ELECTRICAL FEEDTHROUGH GLASS-METAL ELECTRODES

Abstract

An electrical device, having a feedthrough through a housing part which has a material thickness T of the housing of the device and is made of metal. The metal being iron, iron alloys, iron-nickel alloys, iron-nickel-cobalt alloys, KOVAR, steel, high-grade steel, aluminum, aluminum alloys, AlSiC, magnesium, magnesium alloys, titanium or titanium alloys. The housing part having at least one opening, wherein the opening receives a contact element, being a conductor consisting of a conductive material in a glass or glass ceramic material. The housing part has a collar in the region of the opening and thus forms an inner wall of the feedthrough opening having a height H, which is greater than material thickness T, wherein glazing length EL of the glass or glass ceramic material preferably corresponds to height H.

Claims

1. An electrical device, comprising: a housing part; a feedthrough extending through the housing part, the housing part having a material thickness T and is made of metal, the metal being iron, iron alloys, iron-nickel alloys, iron-nickel-cobalt alloys, KOVAR, steel, stainless steel, high-grade steel, aluminum, aluminum alloys, AlSiC, magnesium, magnesium alloys, titanium or titanium alloys, wherein the housing part has at least one opening, wherein the opening receives a contact element consisting of a conductive material in a glass or glass ceramic material, the housing part having a collar in the region of the opening, the collar forms an inner wall of the feedthrough at the opening, the inner wall having a height H which is greater than the material thickness T, wherein a glazing length EL of the glass or the glass ceramic material corresponds to the height H.

2. The electrical device of claim 1, wherein the collar is an upward bulging reshaped collar, the housing part and the collar being a single piece.

3. The electrical device of claim 1, wherein there is a transitional region between the collar and the housing part, the transitional region being rounded on at least one side, the at least one side including the top side, the transitional region being rounded with a radius R.

4. The electrical device of claim 1, wherein material thickness T of the housing part is in a range of 0.02 mm to 1 mm, or in a range of 0.1 mm to 0.3 mm and glazing length EL of the inner wall is in a range of 0.3 mm to 1 mm, a range of 0.4 mm to 0.7 mm, or the glazing length EL is 0.6 mm.

5. The electrical device of claim 1, wherein the housing part has a first thermal coefficient of expansion α.sub.1, the glass and/or glass ceramic material has a second thermal coefficient of expansion α.sub.2 and the contact element, has a third thermal coefficient of expansion α.sub.3 and the thermal coefficients of expansion α.sub.1, α.sub.2 and/or α.sub.3 vary by 2*10.sup.−6 l/K at most, by no more than 1*10.sup.−6 l/K, they are substantially the same, and/or are in the range of 3 to 7*10.sup.−6 l/K, in the range of 4.5 to 5.5*10.sup.−6 l/K or in the range of 9*10.sup.−6 l/K to 11*10.sup.−6 l/K.

6. The electrical device of claim 1, further comprising an insulating element arranged on the glass or the glass ceramic material, the insulating element consisting of a plastic material, a glass or glass ceramic material, the insulating element covering a front face of the collar, a plane of the surface of the collar is located below a plane of the surface of the contact element or a surface of the insulating element is located in one plane with the surface of the contact element.

7. The electrical device of claim 1 wherein the contact element is a cap-shaped element having a thickness in the range of 0.1 mm to 0.3 mm.

8. The electrical device of claim 1, wherein the feedthrough includes a connecting conductor being a tongue which is connected electrically and/or mechanically with the contact element, the contact element being a pin-shaped conductor or a cap-shaped element.

9. The electrical device of claim 8, wherein the contact element is round, with a diameter, the diameter being in a range of 1.5 mm to 5.0 mm, or the diameter is in a range of 2.0 mm to 4.00 mm.

10. The electrical device of claim 1, wherein the electrical device is an electrical storage device having a total height not exceeding 5 mm, not exceeding 4 mm, not exceeding 3 mm, in a range of 1 mm to 5 mm, or in a range of 1 mm to 3 mm.

11. The electrical device, of claim 10, wherein the electrical storage device has a housing which is connected via a flange with the feedthrough, the flange being a flexible flange.

12. The electrical device of claim 11, wherein the flange of the electrical storage device provides a free space F between a raised or lowered region, and a glazing, the flange having a connecting region.

13. The electrical storage device of claim 12, wherein the flexible flange has a tip.

14. The electrical storage device of claim 13, wherein the flange is weakened in the region of the tip.

15. The electrical storage device of claim 14, wherein the tip of the flange has a thickness in the range of 0.05 to 0.2, or a thickness of 0.15 mm.

16. The electrical storage device of claim 11, wherein the flexible flange is connected with a battery housing by welding, laser welding or soldering.

17. The electrical storage device of claim 16, wherein the flange is connected with the battery housing, the connection being substantially gas impermeable having an He leakage rate of less than 1.Math.10.sup.−8 mbar l/sec.

18. The electrical storage device of claim 12 wherein the feedthrough has a plane of a housing region on a surface facing away from a housing interior outside of the feedthrough opening above or below, with an offset to a plane formed by a surface of the conductor facing away from the housing interior and that the inorganic material, in particular the glass or glass ceramic material covers at least one area of a partial surface of a housing component.

19. The electrical storage device of claim 18, wherein the offset measures no more than 1 mm, no more than 0.7 mm, or is in a range of 0.1 mm to 1 mm.

20. The electrical storage device of claim 19, wherein the partial surface of the housing component that is covered by the inorganic material has a wall thickness, the wall thickness being less than 1 mm, less than 0.7 mm, less than 0.5 mm, less than 0.3 mm, less than 0.2 mm, less than 0.1 mm, in a range of 0.02 mm to 1 mm, or in a range of 0.02 mm to 0.1 mm.

21. The electrical storage device of claim 20, wherein a wall of the raised or lowered housing component includes recesses, embossing, fluting or openings.

22. The electrical storage device of claim 21, wherein the opening has a diameter and the diameter of the raised or lowered region decreases or increases in a progression of the raised or lowered region.

23. The electrical storage device of claim 22, wherein the inorganic material, the glass or the glass ceramic material has pores in its volume area, the pores being bubble-shaped pores.

24. The electrical storage device of claim 23, wherein a share of the pores in the volume of the glass or the glass ceramic material is in a range of 10 volume-% to 45 volume-%, or 18 volume-% to 42 volume-%.

25. The electrical storage device of claim 24, wherein the glass or the glass ceramic material forms a glass-metal bond with the end face of the raised or lowered region of the housing region, the bond being free of pores at least in the outside circumferential region of the raised or lowered region.

26. The electrical storage device of claim 25, wherein the surface of the glass or the glass ceramic material is positioned on the surface facing away from the interior of the housing in a plane with the surface of the conductor.

27. The electrical storage device of claim 26, wherein the contact element in the form of a metal pin, a contact pin, or a cap-shaped element includes an indentation.

28. The electrical storage device of claim 27, wherein the raised or lowered region progresses in such a way that a constriction is created.

29. The electrical storage device of claim 29, wherein the raised or lowered region has a glazing length L.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0102] The above-mentioned and other features and advantages of this invention, and the manner of attaining them, will become more apparent and the invention will be better understood by reference to the following description of embodiments of the invention taken in conjunction with the accompanying drawings, wherein:

[0103] FIG. 1 illustrates a cross section through a housing part, in particular a battery cover with an embodiment of a feedthrough according to the present invention, with a cap-shaped element as the conductor;

[0104] FIG. 2 shows further detail of the feedthrough according to the present invention in an area noted as section X of FIG. 1;

[0105] FIG. 3 illustrated further detail of part of the battery cover of FIG. 1 in an area noted as section Y in FIG. 1;

[0106] FIG. 4 is a perspective top view onto a feedthrough according to the present invention used in the battery cover of FIG. 1;

[0107] FIG. 5 is a top view of the feedthrough of FIG. 1 with two intersecting stampings;

[0108] FIG. 6 is a cross sectional view through a housing part, in particular a battery cover with another embodiment of a feedthrough according to the present invention and an insulating element, covering the front face of the collar;

[0109] FIG. 7 is a detail view of the feedthrough of FIG. 6 focusing on area X2 identified in FIG. 6 with the insulating element shown in part;

[0110] FIG. 8 is a cross sectional view through a housing part of the battery cover of FIGS. 1 and 6, in particular a battery cover with a raised edge and an altered thickness in a connecting region due to the offset;

[0111] FIG. 9 is a cross sectional view through a housing part of the battery cover of FIGS. 1 and/or 6 with a raised edge and a flange with a reduced flange thickness;

[0112] FIG. 10 is a cross sectional view through a housing part of the battery cover of FIGS. 1 and/or 6 with a raised edge and a flexible flange;

[0113] FIG. 11 is a cross sectional view through a housing part of the battery cover of FIGS. 1 and/or 6 with a feedthrough, wherein protruding glass material serves as insulating material;

[0114] FIG. 12 illustrates further detail of the feedthrough of FIG. 11 associated with section Y of FIG. 11;

[0115] FIG. 13a illustrates one type of the proposed recesses on the wall of the raised or lowered region and/or on the glazed conductor of the feedthrough of FIGS. 1 and/or 6;

[0116] FIG. 13b illustrates another type of the proposed recesses on the wall of the raised or lowered region and/or on the glazed conductor of the feedthrough of FIGS. 1 and/or 6;

[0117] FIG. 13c illustrates yet another type of the proposed recesses on the wall of the raised or lowered region and/or on the glazed conductor of the feedthrough of FIGS. 1 and/or 6;

[0118] FIG. 13d illustrates still yet another type of the proposed recesses on the wall of the raised or lowered region and/or on the glazed conductor of the feedthrough of FIGS. 1 and/or 6;

[0119] FIG. 14 illustrates a section in the region of the glazing with a glass and/or glass ceramic material in the feedthrough of FIGS. 1 and/or 6;

[0120] FIG. 15 is a cross sectional view through a housing part according to FIG. 11 with a contact device, in particular a contact flag being illustrated;

[0121] FIG. 16 is a cross sectional view through a housing part according to FIG. 11 with a flexible flange; and

[0122] FIG. 17 illustrates a micro-battery with a feedthrough according to at least one of the previous figures of the present invention.

[0123] Corresponding reference characters indicate corresponding parts throughout the several views. The exemplifications set out herein illustrate embodiments of the invention and such exemplifications are not to be construed as limiting the scope of the invention in any manner.

DETAILED DESCRIPTION OF THE INVENTION

[0124] Referring now to the drawings, and more particularly to FIG. 1 there is shown a sectional depiction of a feedthrough according to the present invention for a storage device, in particular an electrical storage device. The housing part, in particular the cover, preferably the battery cover is identified with reference number 1. Battery cover 1 having a width of D3 is reshaped or respectively drawn upward, so that an opening with an edge is created. A glass or glass ceramic material, reference number 2, is inserted into the opening with the edge. Thickness T of the battery cover is preferably only 0.1 mm to 0.3 mm. The drawn-up edge with radius R provides a suitable glazing length, in spite of the possible low material thickness of cover 1. Cover 1 of a capacitor can be designed essentially the same or at least very similar. The presence of a radius contributes to the mechanical stability and reliability of the housing part—in particular in the case of thin material thicknesses—because formation of cracks in the material is thereby suppressed. According to FIG. 1, radius R is positioned on the top and bottom side of the drawn-up edge. In other drawings radius R is only on one side, in particular the top side. The drawings are exemplary, and the teaching science of the invention is interchangeable between the drawings. This means that the embodiments with the radii on either the top or bottom sides can also be designed such, that radii are present on the top and bottom side.

[0125] The substantially circular opening with an edge has a diameter which is identified with D2 in FIG. 1. For one thing, the glass or glass ceramic material is inserted into the opening with diameter D2, and secondly, a conductor, in a first embodiment preferably a cap-shaped element which is identified with reference number 3. Cap-shaped element 3 is inserted in the glass material and is preferably an element obtained by deep drawing. The material of element 3 is preferably a nickel-iron alloy, in particular a nickel-iron-cobalt alloy.

[0126] Like the opening, cap-shaped element 3 in this embodiment is also essentially round and has a diameter D1. As shown in FIG. 1, cap-shaped element 3 has thin side walls 10 (see FIG. 2) with a thickness in the range of, for example 0.1 mm to 0.3 mm and has a hollow space in the cap which normally faces the interior of the housing. The side walls 10 of cap-shaped element 3 and the connecting surface preferably have the substantially same material thickness as cover 1.

[0127] Thin side walls 10 of cap-shaped element 3 whose thickness is coordinated with the thickness of cover 1—preferably a thickness in the range of 0.1 to 0.3 mm—have the advantage that, in contrast to solid pins, they can absorb mechanical transverse loads which occur under thermal stresses. Thus, in contrast to a solid pin the comparatively thin metal yields under transverse loads, especially advantageously in a flexibly resilient manner, whereas a solid pin presses onto the glass where it can result in damage. Another reduction in the load upon the glass is preferably achieved in that all components, namely the housing part with the opening, the glass material and the cap-shaped element 3 have substantially the same thermal coefficient of expansion, namely in the range of 3 to 7*10.sup.−6 l/K.

[0128] Preferred materials for cap 3 are KOVAR, nickel-iron-cobalt alloys but also iron, iron alloys, iron-nickel alloys, iron-nickel-cobalt alloys, titanium, titanium alloys, steel, stainless steel, high-grade steel, magnesium, magnesium alloys, aluminum, aluminum alloys, or AlSiC.

[0129] Also clearly shown in FIG. 1 is the hollow space in cap 3 according to the invention. The hollow space in cap 3 can serve to accommodate various safety devices, for example temperature and/or pressure gauges. With the inventive solution, these can be effectively integrated into the housing. It is preferred if cap 3 is provided with its described base stamping by means of which the pressure release, in the event of a stress situation, can be realized, in particular in the case of battery failure.

[0130] It is especially preferred if contacting of a conductor occurs in the interior of the housing with cap 3 via tongues, which are two-dimensionally connected in particular with cap 3 in the region of the hollow space of cap 3. Contacting by means of tongues has the advantage over contacting by means of a pin, in that the contact areas are larger, along with which there is a lesser contact resistance. The connection with tongues can furthermore be permanently more resistant to shear stresses.

[0131] In the illustrated embodiment cap 3 is preferably round with a diameter D1. Diameter D1 of cap 3 is in the range of, for example 1.5 mm to 5 mm, and preferably between 2.0 mm and 4.0 mm. Exemplary diameter D2 of the opening is substantially larger and is in the range of between 8 mm and 4.0 mm, in particular around 5 mm. Glazing length H of the inventive cap 3 in the opening is preferably between 0.4 mm and 1 mm, preferably 0.6 mm. All stated dimensions are exemplary and do not represent a limitation.

[0132] FIG. 2 is a section X from FIG. 1, here in the embodiment with a base stamping 50. Clearly recognizable are bent cover 1 which leads to the opening with the edge and provides the glazing length H, inventive cap 3 as well as glass or glass ceramic material 2. All three components together create a so-called matched feedthrough, wherein the thermal coefficient of expansion of the housing part 1 as well as that of the glass and/or glass ceramic material 2 and cap 3 is substantially the same.

[0133] Also shown in FIG. 2 base stamping 50 is introduced into metal 40 of cap 3. The strength, or respectively thickness of cap-shaped element 3 is in the range of 0.1 to 0.3 in this embodiment.

[0134] The material thickness in the region of stamping 50 is greatly reduced and is preferably in the μm range, depending on the requirements regarding at what pressure a pressure release is to occur. Exemplary material strengths, that is the thicknesses of the metal 40 in the region of stamping 50 are in the range of 10 μm to 50 μm as used in this embodiment, however, without restriction thereto. The material thicknesses in the region of stamping 50 are thus the remaining material thicknesses.

[0135] FIG. 3 illustrates detail Y of cover 1 from FIG. 1. Exemplary cover 1 has a gradation with which it can be welded or soldered onto other housing parts. Such a gradation is advantageous, however not necessary. Designs without gradation are also conceivable. By means of welding or soldering the feedthrough is connected with the rest of the housing of the electrical device, in particular the storage device in a hermetically sealed manner, that is with the He leakage rate of less than 1.Math.10.sup.−8 mbar l/s at 1 bar pressure difference.

[0136] FIG. 4 is a perspective view of the inventive feedthrough having a round outer shape. Same components as in FIGS. 1 to 3 are identified with the same reference numbers. FIG. 4 shows the entire cover 1 with cap 3 in a glass material 2.

[0137] FIG. 5 is a top view of inventive cap 3 in a glass material 2. Same components are again identified with the same reference numbers. The two base stampings 50.1, 50.2 which are introduced into the metal can be clearly seen in FIG. 5. Base stampings 50.1, 50.2 progress over the entire diameter of cap 3. The example—without limitation thereto—shows two base stampings 50.1, 50.2 which intersect at right angles, in particular in a cross-like manner.

[0138] FIG. 6 shows an alternative arrangement of the embodiment of a feedthrough according to FIG. 1. In the arrangement according to FIG. 6 an insulating element 200 is provided which covers the drawn-up edge which creates a collar 100. Collar 100 is created by pulling upward, that is reshaping of the thin housing part, in particular the battery cover 1. If collar 100 is created by reshaping the thin housing part 1, then the collar is generally one piece. Material thickness T of housing part 1 is preferably between 0.1 mm to 0.3 mm. The glazing length provided by the drawn-up region with a height H which is identified in FIG. 8 with EL is between 0.3 mm and 1 mm in the illustrated embodiment. Thickness S of the insulating element can for example be 0.1 mm to 0.5 mm but can be selected according to the application. As insulating material a plastic material or a glass or glass ceramic material can be used. Height B is equal to height H of the drawn-up region and thickness S of the insulating element. The diameter of the opening into which the conductor or respectively cap-shaped element 3 is inserted or respectively glazed is D2. The diameter of cap-shaped element 3 is D1.

[0139] Insulating material 200 consisting in particular of plastic or glass or ceramic is arranged on glass or glass ceramic material 2 and covers in particular the front face of collar 100 or respectively of the drawn-up region. The collar is thus electrically insulated from the conductor 3. The plane of the surface of collar 100 is preferably located below the plane of the surface of contact element 3 or respectively conductor 3. It is especially preferred if the surface of insulating element 200 is located in one plane with the surface of the contact element or respectively the conductor, in this case cap-shaped element 3. FIG. 7 shows a detailed view of FIG. 6 according to detail X2. Same components as in FIG. 6 are assigned the same reference numbers. Insulating element 200 which insulates the protruding collar and thereby the housing component safely from the conductor is clearly recognizable in FIG. 7.

[0140] FIG. 8 shows a housing part 1 with a drawn-up edge 300 which provides a glazing length EL. Edge 300 forms a collar. Glazing length EL is preferably between 0. 3 mm and 1 mm. Thickness D of the bent metal which provides the collar, or drawn-up edge is in this case for example in the range of 0.1 mm to 0.3 mm. Housing part 1 moreover includes a flange 310 with which the housing part 1, in particular the cover 1 including the feedthrough is being connected with another part of the housing, for example by means of welding. To provide a tight connection between the housing part 1 in the form of a feedthrough and the rest of the housing it is provided in the embodiment shown in FIG. 8 that, at the end of flange 310 in region 320 the material is not stamped, but is offset to a thickness of 0.15 mm. Since the material in the region in which it is connected with the rest of the housing, for example by means of laser welding, is in fact changed in its thickness by offsetting but not weakened, cracks in the glass can be avoided and a tight connection of housing part 1 with the feedthrough in the housing, for example the battery cover can be provided. “Tight” in the current example means the He leakage rate is less than 1.Math.10.sup.−8 mbar l/s at 1 bar pressure difference. In order to avoid tearing of the offset region provision can be made to provide the offset region with a radius R which can advantageously be at least 0.05 mm.

[0141] FIG. 9 illustrates an alternative arrangement of a housing part 1 with drawn-up edge 300 and flange 310. Same components as in FIG. 8 are identified with the same reference numbers. Drawn-up edge 300 provides a glazing length EL. In the arrangement according to FIG. 7 a solid conductor 400 in a glass material 2 instead of a cap-shaped element 3 is glazed into opening 410 with drawn-up edge 300 of the housing component over length E.

[0142] Instead of solid conductor 400 a cap-shaped element, as shown in FIGS. 1 to 7, with the therein described advantages can of course also be glazed. The arrangement according to FIG. 9 also includes a flange 310 which serves to connect the feedthrough or respectively the housing component with the feedthrough with the housing of, for example, a storage device, for example by means of laser welding. In order to improve the permeability in a connection of the housing component or respectively of the feedthrough with the rest of the battery housing it is provided the reduce the thickness of flange 310 in region 350—for example by means of embossing—from 0.2 mm to 0.15 mm or 0.1 mm.

[0143] The flange is hereby reduced in its thickness, in other words made thinner and has then better elasticity in particular for laser welding, which again provides better impermeability.

[0144] An arrangement is shown in FIG. 10 where flange 310 of the feedthrough for an electrical storage device is a flexible flange. Flange 310 includes a connecting region 380 which serves to connect the feedthrough with conductor 400 glazed into the glass or glass ceramic material 2 with a housing, for example a housing of a storage device. The connection of the feedthrough with the housing can occur through welding, in particular laser welding, but also soldering. The connection is made so that the He leakage rate is less than 1.Math.10.sup.−8 mbar l/s at 1 bar pressure difference. This makes the He leakage rate identical to that for the glazed conductor and a hermetically sealed housing for a storage device, in particular a battery is provided. On account of free space F between the drawn-up region, that is edge 300 which provides glazing length EL and connecting region 380, pressures acting upon the glass can be reliable compensated for. The flexibility of flange 310 prevents for example the breaking of the glass during temperature fluctuations.

[0145] In particular, any tensile or compressive stress, which occurs, for example with laser welding, is avoided due to the flexibility of flange 310. Thus, tensile and compressive tensions can be deflected from the welded cap to the ring. Same components as in FIGS. 8 and 9 are identified with the same reference numbers. In all arrangements of a feedthrough according to FIGS. 8 to 10 no glass material protruding over the edge of the drawn-up region is provided for insulation of the housing and the conductor which is fed through the housing component in the feedthrough. In such an arrangement an electrical insulation can be provided by introducing an additional insulating material, as shown in FIG. 6 and FIG. 7.

[0146] FIG. 11 shows a cross sectional view of an alternative arrangement of a feedthrough 1 for an electrical storage device. Housing component 1002 through which the feedthrough leads is in particular a part of a housing for an electrical storage device, in particular a battery cover. This housing part is identified with reference number 1002. In the illustrated embodiment housing part 1002, in particular the battery cover is obtained by a reshaping process and has a width B. The housing part in this example has a drawn-up region 1003, in other words, the battery cover is raised or drawn upward, so that a wall 1004 is created in the region of feedthrough opening 1005. The raised region is also referred to as a collar. Instead of the raised region a lowered region of the housing component in the region of feedthrough opening would also be possible in order to provide wall 1004 with a corresponding glazing length EL or H in the region of the opening. Reshaping, or respectively raising or lowering of the housing component or battery cover in the region of feedthrough opening 1005 is important in the current example, because thickness T of the housing component or respectively the battery cover is very thin. Wall thickness T of the housing component or respectively the battery cover is preferably less than 1 mm, preferably less than 0.7 mm, in particular less than 0.5 mm, especially preferably less than 0.3 mm, in particular less than 0.2 mm, particularly preferably less than 0.1 mm. To provide sufficient stability of the housing component it is necessary to provide a minimum thickness of 0.02 mm. An especially preferred range which on the one hand has the necessary stability, on the other hand provides a housing or housing component with relatively small dimensions which in turn results in a compact storage housing, is in a thickness range of 0.02 mm to 1 mm, preferably 0.02 mm to 0.1 mm. Such a thickness for the housing component is however not sufficient for glazing. To provide the necessary glazing length EL or H, raised or lowered regions of the metal which form the housing component, for example the battery cover, are necessary. For this purpose, the thin metal is bent upward or downward or respectively reshaped, resulting in raised or lowered region 1003 which is also referred to as a collar.

[0147] In contrast to a solid plate as used in the current state of the art which, based on its thickness provides the necessary glazing length, an especially thin and thus compact housing part with a feedthrough opening having a sufficient glazing length EL or H of preferably 0.3 mm to 1 mm, preferably approximately 0.6 mm is provided with the inventive arrangement with a relatively thin housing component and raised or lowered regions which are for example created by reshaping. The diameter of opening 1005 is between 2 mm and 5 mm, in particular 2.5 mm to 4 mm.

[0148] In addition, also illustrated in the drawing is metal pin 1010 which is inserted in feedthrough opening 1005 and which, in the current example is in the embodiment of a solid pin. Instead of solid metal pin 1010, the conductor may also consist of a cap-shaped element (not illustrated). The cap-shaped element compared to the solid metal pin has the advantage that it is also manufactured from a comparatively thin metal which yields in the event of a transverse load, especially advantageously in a flexibly resilient manner, whereas, in contrast a solid metal pin presses on the glass where it can cause damage.

[0149] The invention provides that the conductor, in particular metal pin 1010 is glazed into the feedthrough opening which is created by the raised or lowered region 1003 of the metal, preferably in an inorganic material, in particular in a glass or a glass ceramic material. The glass or glass ceramic material of the glazing is identified with reference number 1020 in the current example. According to the present invention it is provided that the inorganic material, in particular the glass or glass ceramic material covers a partial area of the housing component outside wall 1004, which supports the glazing. This protruding section of the glass that covers the housing component or respectively the battery cover is identified in the current example with reference number 1050. The fact that the glazing covers end 1052 of the raised region with a glass or glass ceramic material ensures that metal pin 1010 is electrically insulated from the housing component that is also made of metal. Instead of the glass material protruding over the edge of the raised region, an insulation can also be provided by a separate insulating material, as shown in FIG. 6 and FIG. 7. In contrast to housing component 1002 which is covered by glass or respectively glass ceramic material 1020 in order to provide an electrical insulation, the conductor, in particular the metal pin or the cap-shaped element is not covered by glass and is merely on a plane with the glazing in order to provide sufficient contact. As shown in FIG. 11 an offset V exists between planes 1100 in which the end of metal pin 1010 comes to rest and plane 1110 in which upper end 1052 of the raised region is located. The offset measures no more than 1 mm, preferably no more than 0.7 mm to 1 mm. The height of the offset also determines thickness D of glass cover 1050 which covers the raised region 1052 and ensures electrical insulation.

[0150] The glass that is used is a swelling glass with a share of bubbles or pores in the glass. This applies especially to the volume range. The share of bubbles or respectively a pore share is preferably 18 to 42 weight percent. To create the bubbles or respectively pores 1101, gas is added to the glass, which is outgassed again during melting and results in pores 1101. The glass ceramic material is alumoborate glass with the following main components: Al.sub.2O.sub.3, B.sub.2O.sub.3, BaO and SiO.sub.2. The coefficient of expansion of the glass material is in the range α.sub.glass of 9.0 to 9.5*10.sup.−6/K.

[0151] The preferred materials for the housing component as well as for the conductor in the embodiment of a metal pin are iron, an iron alloy, an iron-nickel alloy, an iron-nickel-cobalt alloy, Kovar, steel, stainless steel, high-grade steel, aluminum, an aluminum alloy, AlSiC, magnesium, a magnesium alloy, titanium or a titanium alloy. It is especially preferred if the material of the housing component, as well as of the conductor, is a high-grade steel, in particular an alloyed high-grade steel according to EN 10020, preferably a high-grade steel containing chromium, in particular a high-grade steel selected from the group of ferritic high-grade steels and/or hardened high-grade steels. It is especially preferred if AISI446 or AISI430 are used as the ferritic high-grade steel materials. The metal pins used as the conductor are made of a ferritic high-grade steel and can be furnished with a nickel and/or gold cover, so that easy contacting is provided. The chromium content of the ferritic high-grade steels is in the range of 10 weight percent chromium to 30 weight percent chromium. The thermal coefficient of expansion is preferably in the range of 9.0 to 10.0 ppm/K, for example for high-grade steel AISI443 at 9.9*10.sup.−6/K.

[0152] Based on the thin component thickness of the component housing, it is preferred that the feedthrough is not a compression seal with different coefficients of expansion for the pin material, the glass material and the housing material, but that the coefficients of expansion are substantially the same and that the feedthrough is a matched feedthrough. This means that α.sub.glass α.sub.pin α.sub.housing show a difference in their coefficients of expansion which is maximally 2 ppm/K, preferably maximally 1 ppm/K. Based on the coefficient of expansion for the pin material α.sub.pin of 9.9 ppm/K or respectively 9.9*10.sup.−6/K for ferritic high-grade steel AISI443 it is advantageous if the alumoborate glass has a coefficient of expansion of 9.1 ppm/K or respectively 9.1*10.sup.−6/K. The thin housing material is selected in regard to the coefficient of expansion to be approximately the same as that of the glass and material of the conductor. The material of the housing component is preferably also a ferritic high-grade steel, for example AISI443. However, the material of the housing is in no way restricted thereto. Other materials as specified in the application are also possible if the coefficient of expansion does not differ greatly from that of the glass and conductor material.

[0153] As illustrated in FIG. 11, the housing component is arranged outside the raised or lowered region in a first plane 1060, and the raised or lowered region in a second plane 1070. In the illustrated embodiment first plane 1060 is angled relative to second plane 1070. In the illustrated embodiment first and second plane 1060, 1070 are arranged substantially vertical on top of one another however, this does not necessarily have to be the case. It is also possible that the raised or lowered region are not arranged completely vertical on top of another, but at an angle of 80° and thus slightly tilted so that a conical progression of wall 1004 of feedthrough opening exists which results in a constriction of the feedthrough opening, resulting in improved adhesion of the glass or glass ceramic material.

[0154] To improve adhesion for the glass material in feedthrough opening 1005 provision can be made that the material, in particular the metal that provides the inside wall of the feedthrough opening includes recesses and/or openings, as illustrated in FIGS. 13a-13d. To create space for the swelling glass material which will be inserted into the feedthrough opening provision can be made that the raised or lowered region is equipped not only with recesses but also with lateral openings. In addition to providing space for the swelling glass material said lateral openings also lead to improved glass adhesion. If the interconnection of the glass material is to be further improved, it is provided that the lateral openings in the raised or lowered region have different diameters, wherein the diameters become smaller in the progression of the raised region.

[0155] An additional improvement in the adhesion can be achieved if the conductor, in particular the metal pin, preferably the contact pin, but also the cap-shaped element has an indentation which is not illustrated in the current example. Whereas the glass has a share of 18-42% of pores in the feedthrough opening, the glass or glass ceramic material is largely pore-free at the faces 1052 of the raised or lowered region which identified with 1003. The glass or glass ceramic material which has pores 1101 in the volume region thus forms a pore-free unbroken surface in its surface area, in particular a glass or glass ceramic skin which coats the housing component in particular on the boundary surface to the air.

[0156] FIG. 12 is a detailed illustration of the region of the edge or respectively end 1052 of the raised region in FIG. 11, in particular the drawn-up region of the metal, wall 1004 for the feedthrough opening 1005 and a collar, as well as glass material 1020 which covers the upper region or respectively upper end 1052 of drawn-up region 1003 in the form of a glass skin and thus provides for sufficient electrical insulation of metal pin 1010. Clearly visible is offset V which denotes the height difference of plane 1100 in which metal pin 1010 comes to rest and plane 1110 in which the end of the protruding region is located. The offset which is in the range of 0.1 mm to 1 mm also determines the thickness of glass layer 1050 which covers the protruding region and provides the electrical insulation. Same components as in FIG. 11 are identified with the same reference numbers in FIG. 12.

[0157] FIGS. 13a-13d show different types of recesses on the interior wall of the drawn-up housing component and/or the glazed metal pin or respectively the cap-shaped element. FIG. 13a shows in principle detail Y from FIG. 11, wherein recesses 1200 are introduced into inside wall 1004 of drawn-up region 1003 as well as into cap wall 1300. The recesses serve to improve adhesion and according to FIG. 13a are introduced into the metal of inside wall 1004 as also of cap 1302 by means of stamping prior to the reshaping process, for example drawing.

[0158] FIG. 13b shows a variation of the invention. Same components as in FIG. 13a are identified with the same reference numbers. In the embodiment according to FIG. 13b the conductor is not designed as a cap-shaped element as in FIG. 13a, but instead as a metal pin 1010 made a solid material. In the embodiment according to FIG. 13b recess 1202 is introduced into the inside wall of the drawn-up region 1003 the same way as there is a recess 1202 in the wall of metal pin 1010 consisting of solid material facing glass material 1020.

[0159] FIG. 13c shows a third variation to introduce the recesses. The conductor in FIG. 13c is a cap-shaped element 1302 as per FIG. 13a. Recesses 1204 were introduced by means of compression, preferably penetration during the reshaping process for the drawn-up region 1003 of the component as well as into cap-shaped element 1302. Recesses 1204 can be indentations or convexities. In the current example the recesses are illustrated as convexities.

[0160] FIG. 13d shows an additional variation for introducing the recesses. In the variation according to FIG. 13d a fluting 1312 with various patterns is introduced—preferably by stamping of the metal—into inside wall 1004 of raised region 1003 as well as onto cap-shaped element 1302. Same components as in the previous drawings are identified with the same reference numbers.

[0161] FIG. 14 shows a cut through view of an inventive component in the region of the glazing. The reference numbers are taken from FIGS. 11 and 12. Clearly visible are pores 1101 in the volume of glass material 1004. Also shown is raised region 1003 of the housing component. As can be seen in FIG. 14, glass material 1050 coats an upper end or respectively an end face 1052 of raised region 1003. In contrast to the volume of the glass material with pores 1101, the glass material at the interface with the air indicates no presence of pores 1101. Instead, a pore-free glass film or respectively glass skin is formed. From FIG. 14 it is also evident that the glass skin does not necessarily need to develop at the interface to the metal. Surprisingly, in spite of this, a hermetically sealed feedthrough is achieved. It can be assumed that at least the glass skin at the interface to the air is an effective barrier. Naturally, the invention also provides glazing variations where a glass skin is also formed at the interface with the metal.

[0162] FIG. 15 shows the feedthrough according to FIG. 11 or 12, wherein with the conductor or respectively with metal pin 1010 a contact device, in this example a contact flag 1400 is electrically and mechanically connected. The electrical connection occurs with conductor 1010 in the embodiment of a metal pin on top side 1402 by flat contact of inside 1404 of contact flag 1400. Based on offset V of surface 1100 of top side 1402 of the metal pin and the surface or respectively plane 1110 of top side 1052 of raised region 1003, glass material can cover end 1050 or respectively the surface of the raised region in said thickness, so that an electrical insulation from drawn-up component 1003—in this example consisting of ferritic high-grade steel—and contact flag 1400 consisting of a metal is achieved. The glass material, in particular the swelling glass material enters the gap between the raised region and the contact flag and ensures electrical insulation of the contact flag which can be connected to other electrical consumers or devices, in particular to the battery interior, as shown in FIG. 17, and the housing. The electrical insulation could also be achieved through a separate insulating element, as shown in FIGS. 6 and 7.

[0163] An embodiment is shown in FIG. 16, wherein flange 1500 of feedthrough 1001 is a flexible flange 1500. Flange 1500 includes a connecting region 1502 which serves to connect feedthrough 1001 together with conductor 1010 which is glazed into glass or glass ceramic material 20 with a housing, for example a housing of a storage device. Connection of the feedthrough with the housing can occur by means of welding, in particular laser welding, but also soldering. The connection is made so that the He leakage rate is less than 1.Math.10.sup.−8 mbar l/s at 1 bar pressure difference. This makes the He leakage rate identical to that for the glazed conductor, and a hermetically sealed housing for a storage device, in particular a battery is provided. On account of free space F between the raised or lowered region 1003 which provides glazing length EL or respectively H and connecting region 1502 pressures acting upon the glass can be reliable compensated for. The flexibility of the flange as shown in FIG. 16 prevents, for example, the breaking of the glass during temperature fluctuations. Therefore, tensile and compressive stresses which occur, for example, during laser welding can be securely avoided. Laser welding of the illustrated housing component with the remaining housing occurs at tip 1504 of flexible flange 1502. The thickness of the flange is weakened in the region of tip 1504 and is only 0.15 mm. Flange 1502 of the feedthrough which is weakened in the region of tip 1504 can be connected directly with the remaining housing of the electrical storage device by means of laser welding, resulting in an electrical storage device with a feedthrough 1001 as described in FIG. 16. Because the feedthrough is very compact due to the very thin material thickness of the housing part or respectively the battery cover of only 0.1 mm to 1 mm, a very compact storage device, in particular a micro-battery can be provided by means of installation of such a feedthrough into a battery housing—for example by means of a welding connection in the region of tip 1504 of the feedthrough with the remaining storage device housing.

[0164] In FIG. 17 an inventive electrical device, in particular a micro-battery with an inventive feedthrough is shown. The electrical device or respectively the micro-battery is identified with 10000. Feedthrough 1001 is designed as shown in FIG. 16. The same components of the feedthrough as in FIGS. 16 and 15 are identified with the same reference numbers in FIG. 17. Feedthrough 1001 or respectively the battery cover with the feedthrough is tightly sealed in region 1504 with a flange 10001 of the housing of the electrical device or respectively the micro-battery by means of welding, in particular laser welding. A contact flag 1400 as in FIG. 15 is connected to conductor 1010 which is sealed in a glass material 1020 into the opening in feedthrough 1001. Via contact flag 1400 which protrudes into housing 10010 the battery in housing 10010 is electrically connected. The pressure-tight connection of the housing cover with the feedthrough with the remaining housing of the battery, which is designed in cylindrical form and which connects directly to feedthrough 1001 can occur through welding. Welding occurs preferably between feedthrough 1001 and the cylindrical housing part which accommodates the battery, in the region of tip 1504 of the feedthrough. The height of the region that is welded to tip 1504 is 5 mm at most, preferably 3 mm at most, in particular it is in the range of 1 mm to 5 mm and determines the height of the micro-battery. Pressure sealed means that the He leakage rate is less than 1.Math.10.sup.−8 mbar l/s at 1 bar pressure difference. The flexible flange provides sufficient flexibility, even after welding the feedthrough in the housing or with the remaining housing part.

[0165] On the basis of the compact feedthrough, the height of the entire micro-battery is at most 5 mm, preferably at most 3 mm, in particular it is in the range of 1 mm to 5 mm. The dimensions in the region of the feedthrough with the flexible flange according to FIGS. 15, 16, and 17 are as follows: the diameter of conductor 1010 is 1 mm to 2 mm, preferably 1.5 mm. The diameter of the opening is in the range of 1 mm to 4 mm, preferably 2.5 mm to 3.0 mm. The region covered by the glass material for the purpose of insulation is around 0.2 mm. The width of the entire feedthrough which is inserted into the housing is between 4.0 mm and 6.0 mm, preferably 4.5 mm. Same as in FIGS. 11 to 15, the embodiment according to FIGS. 16 and 17 is also characterized in that an area of a partial surface 1052 of the housing part is covered by an inorganic material, in particular a glass material or a glass ceramic material in order to provide an electrical insulation, for example, for a contact flag 1400 against the housing with the inserted feedthrough.

[0166] The feedthrough according to the invention is used for housings for electrical storage devices, in particular batteries of capacitors. On the basis of the very flat inventive feedthrough for an electrical storage device an electrical storage device can be provided having a total height of at most 5 mm, in particular at most 4 mm, preferably at most 3 mm, in particular in the range of 1 mm to 5 mm, preferably 1 mm to 3 mm.

[0167] Thus, a very flat feedthrough is specified for the first time, which allows for very compact components with electrical storage devices, in particular batteries or capacitors.

[0168] In addition, a feedthrough or respectively an electrical device is provided, in particular a storage device which is characterized by greater stability in regard to mechanical and/or pressure related transverse loads. The inventive feedthrough moreover has the advantage that it can be produced efficiently, that it offers an increased inside housing volume and thus greater battery or capacitor capacities and at the same time contributes to weight reduction due to reduced material use.

[0169] In addition the feedthrough can be designed in such a manner that the cap provides a safety function, in particular in regard to the battery or capacitor internal pressure.

[0170] In an alternative embodiment of the invention a feedthrough for a housing component or respectively a housing component is provided which includes a flange and which is characterized in that the feedthrough, or respectively the housing component can be tightly sealed with the housing, for example a storage device and it absorbs tensile and compressive stresses.

[0171] The invention comprises aspects which are recorded in the following propositions, which are part of the description, but which are not claims

Propositions

[0172] 1. Feedthrough, in particular through a housing part (1) of a housing, in particular a storage device, preferably a battery or a capacitor, consisting of metal, in particular iron, iron alloys, iron-nickel alloys, iron-nickel-cobalt alloys, KOVAR, steel, stainless steel, high-grade steel, aluminum, an aluminum alloy, AlSiC, magnesium, a magnesium alloy, titanium or a titanium alloy, wherein the housing part has at least one opening, wherein the opening receives a conductive material in a glass or glass ceramic material (2), characterized in that [0173] the conductive material is a cap-shaped element (3), in particular having a thickness or wall strength in the range of 0.1 mm to 0.3 mm.

[0174] 2. Feedthrough according to proposition 1, [0175] characterized in that [0176] cap-shaped element (3) comprises side walls (10), preferably thin side walls, and/or a hollow space in the cap.

[0177] 3. Feedthrough according to one of the propositions 1 to 2, [0178] characterized in that [0179] cap-shaped element (3) is a drawn component.

[0180] 4. Feedthrough according to one of the propositions 1 to 3, [0181] characterized in that [0182] in addition the feedthrough comprises a conductor, in particular in the embodiment of a tongue which is connected electrically and/or mechanically with cap-shaped element (3), preferably inside cap-shaped element (3), preferably inside the hollow space of the cap.

[0183] 5. Feedthrough according to proposition 3, [0184] characterized in that [0185] in the hollow space the cap of cap-shaped element (3) sensor devices, in particular temperature and/or pressure gauges are arranged.

[0186] 6. Feedthrough according to one of the propositions 1 to 5, [0187] characterized in that [0188] cap-shaped element (3) includes at least one region with locally reduced thickness, in particular a base stamping (50), in particular having a thickness in the range of 10 μm to 50 μm, acting as a safety release in the event of a pressure overload.

[0189] 7. Feedthrough according to one of the propositions 1 to 6, [0190] characterized in that [0191] the side wall of cap-shaped element (3) is designed conically.

[0192] 8. Feedthrough according to one of the propositions 1 to 7, [0193] characterized in that [0194] cap-shaped element (3) is preferably round, with a diameter, wherein the diameter is in particular a diameter in the range of 1.5 mm to 5.0 mm, in particular 2.0 mm to 4.00 mm.

[0195] 9. Feedthrough according to one of the propositions 1 to 8, [0196] characterized in that [0197] housing (1) has a first coefficient of expansion α.sub.1, the glass [0198] or glass ceramic material (2) has a second coefficient of expansion α.sub.2 and cap-shaped element (3) has a third coefficient of expansion α.sub.3 and [0199] thermal coefficients of expansions α.sub.1, α.sub.2, α.sub.3 are substantially the same and are preferably in the range of 3 to 7*10.sup.−6 l/K, preferably 4.5 to 5.5*10.sup.−6 l/K.

[0200] 10. A housing, in particular a housing for an electrical storage device, in particular a battery or capacitor having a feedthrough according to one of the propositions 1 to 9.

[0201] 11. A storage device, in particular a battery or capacitor with a housing or housing part according to proposition 10.

[0202] 12. A feedthrough, in particular through a housing part (1001) of a housing, in particular of a housing, in particular a storage device, preferably a battery or a capacitor, made of metal, in particular iron, iron alloy, iron-nickel alloy, iron-nickel-cobalt alloy, KOVAR, steel, stainless steel, high-grade steel, aluminum, an aluminum alloy, AlSiC, magnesium, a magnesium alloy, titanium or a titanium alloy, wherein the housing part has at least one opening, wherein the opening receives a conductive material, preferably a conductor in a glass or glass ceramic material, [0203] characterized in that [0204] the housing part is drawn upward so that the opening is formed with a drawn-up edge (100, 300, 1003).

[0205] 13. Feedthrough according to proposition 12, [0206] characterized in that [0207] drawn-up edge (100, 300, 1003) provides a glazing length (EL)

[0208] 14. Feedthrough according to one of the propositions 12 to 13, [0209] characterized in that [0210] the housing part has a thickness, and the thickness is in the range of 0.1 mm to 0.3 mm.

[0211] 15. Feedthrough according to one of the propositions 12 to 14, [0212] characterized in that [0213] glazing length EL is 0.3 mm to 1 mm.

[0214] 16. Feedthrough according to one of the propositions 12 to 14, [0215] characterized in that [0216] the conductor is a solid conductor, preferably a pin, in particular a solid pin.

[0217] 17. Feedthrough according to one of the propositions 12 to 16, [0218] characterized in that [0219] the conductor consists of a metal, in particular iron, an iron alloy, an iron-nickel alloy, an iron-nickel-cobalt alloy, KOVAR, titanium, a titanium alloy, steel, stainless steel, high-grade steel, aluminum, an aluminum alloy, AlSiC, magnesium and a magnesium alloy.

[0220] 18. Feedthrough according to one of the propositions 12 to 17, [0221] characterized in that [0222] housing component (2, 1002) has a first coefficient of expansion α.sub.housing, conductor (5, 1005), in particular the metal pin, preferably the contact pin has a second coefficient of expansion α.sub.pin and the glass or glass ceramic material (20) has a third coefficient of expansion α.sub.glass and that the difference of first, second and third coefficient of expansion is 2 ppm/K maximum, preferably 1 ppm/K maximum.

[0223] 19. Feedthrough according to one of the propositions 12 to 18, [0224] characterized in that [0225] the first, second and third coefficients of expansion (α.sub.pin, α.sub.glass, α.sub.housing) is in the range of 9 ppm/K to 11 ppm/K.

[0226] 20. Feedthrough according to one of the propositions 12 to 19, [0227] characterized in that [0228] the wall of the drawn-up edge comprises recesses, in particular embossing, fluting or openings.

[0229] 21. Feedthrough according to one of the propositions 12 to 20, [0230] characterized in that [0231] the housing component with raised edge (100, 300, 1003) includes a flange, in particular a flexible flange, or connects to a flexible flange (1110).

[0232] 22. Feedthrough according to one of the propositions 12 to 21, [0233] characterized in that [0234] flexible flange (1110) includes a connecting region (1180) for connecting the flange to a housing part, in particular a battery housing part.

[0235] 23. Housing, in particular a housing for an electrical storage device, in particular a battery or capacitor with a feedthrough according one of the propositions 12 to 22.

[0236] 24. Storage device, in particular a battery or capacitor, with a housing or housing part according to proposition 23.

[0237] 25. Storage device, in particular electrical storage device according to proposition 24, [0238] characterized in that [0239] the electrical storage device has a total height not exceeding 5 mm, in particular not exceeding 4 mm, preferably not exceeding 3 mm, in particular in the range of 1 mm to 5 mm, preferably 1 mm to 3 mm.

[0240] 26. Electrical storage device according to one of the propositions 24 to 25, [0241] characterized in that [0242] the electrical storage device includes a contact device (1400), in particular a contact flag.

[0243] 27. Electrical storage device according to one of the propositions 24 to 26, [0244] characterized in that [0245] the electrical storage device has a housing which is connected via a flange (1110), in particular a flexible flange with the feedthrough according to one of the propositions 21 to 22.

[0246] 28. Electrical storage device according to proposition 27, [0247] characterized in that [0248] flange (1110), in particular the flexible flange is connected with the battery housing by means of welding, in particular laser welding or soldering.

[0249] 29. Electrical storage device according to proposition 28, [0250] characterized in that [0251] flange (1110) is connected with the battery housing in such a way, the connection is substantially gas impermeable, and that the He leakage rate is preferably less than 1.Math.10.sup.−8 mbar l/s at 1 bar pressure difference.

[0252] 30. Feedthrough (1001) through a housing component (1002), preferably an annular housing component with a feedthrough opening (1005) of an electrical storage device, preferably a battery or a capacitor, with at least one conductor (1010), in particular a metal pin, preferably a contact pin, in particular preferably a cap-shaped element which, by means of an inorganic material, in particular a glass or glass ceramic material (1020) is insulated in the housing feedthrough opening (1005), preferably electrically insulated from the housing component, [0253] characterized in that [0254] a plane (1110) of the housing region is arranged on the surface facing away from the housing interior outside the feedthrough opening above or below, with an offset (V) to a plane (1100) which is formed by the surface of the conductor facing away from the housing interior and that the inorganic material, in particular the glass or glass ceramic material (1020) covers at least one area of a partial surface of housing component (1052).

[0255] 31. Feedthrough according to proposition 30, [0256] Characterized in that [0257] offset (V) measures no more than 1 mm, preferably no more than 0.7 mm, and is in particular in the range of 0.1 mm to 1 mm.

[0258] 32. Feedthrough according to one of the proposition 30 or 31, [0259] characterized in that [0260] housing component (1002) has a first coefficient of expansion α.sub.housing, conductor (1005), in particular the metal pin, preferably the contact pin has a second coefficient of expansion α.sub.pin and the glass or glass ceramic material (1020) has a third coefficient of expansion α.sub.glass and that the difference of first, second and third coefficient of expansion is 2 ppm/K maximum, preferably 1 ppm/K maximum.

[0261] 33. Feedthrough according to one of the propositions 30 to 32, [0262] characterized in that [0263] the first, second and third coefficients of expansion (α.sub.pin, α.sub.glass, α.sub.housing) is in the range of 9 ppm/K to 11 ppm/K.

[0264] 34. Feedthrough according to one of the proposition 30 to 33, [0265] characterized in that [0266] the partial surface of housing component (1052) that is covered by the inorganic material, in particular the glass or glass ceramic material (1020) has a wall thickness wherein the wall thickness is less than 1 mm, preferably less than 0.7 mm, in particular less than 0.5 mm, especially preferably less than 0.3 mm, in particular less than 0.2 mm, particularly preferably less than 0.1 mm. preferably in the range of 0.02 mm to 1 mm, in particular in the range of 0.02 mm to 0.1 mm.

[0267] 35. Feedthrough according to one of the proposition 30 to 34, [0268] characterized in that [0269] housing component (1002) and/or metal pin (1005) consist of one of the following materials: [0270] iron, [0271] an iron alloy, [0272] an iron-nickel alloy, [0273] an iron-nickel-cobalt alloy, [0274] Kovar, [0275] steel, [0276] stainless steel, [0277] high-grade steel, [0278] ferritic high-grade steel, [0279] austenitic high-grade steel, [0280] Duplex high-grade steel [0281] aluminum [0282] an aluminum alloy, [0283] AlSiC, [0284] magnesium, [0285] a magnesium alloy, [0286] titanium, [0287] a titanium alloy.

[0288] 36. Feedthrough according to one of the proposition 30 to 35, [0289] characterized in that [0290] housing component (1002) includes a raised or lowered region (1003) in the region of the feedthrough opening, in such a manner that a wall (1004) is created in the region of the feedthrough opening.

[0291] 37. Feedthrough according to one of the proposition 30 to 36, [0292] characterized in that [0293] that the housing component outside raised or lowered region (1003) has a first plane (1060) and the raised or lowered region is located in a second plane (1070) and the first plane, and the first plane is angled toward the second plane, in particular vertically angled.

[0294] 38. Feedthrough according to one of the proposition 30 to 37, [0295] characterized in that [0296] the glass or glass ceramic material covers an end face (1052) of the raised or lowered region.

[0297] 39. Feedthrough according to one of the proposition 30 to 38, [0298] characterized in that [0299] wall (1004) of the raised or lowered housing component comprises recesses (1200, 1202, 1204) in particular embossing, fluting or openings.

[0300] 40. Feedthrough according to proposition 39, [0301] characterized in that [0302] the opening has a diameter and the diameter of the raised or lowered region decreases or increased in the progression of the raised or lowered region.

[0303] 41. Feedthrough according to one of the proposition 30 to 40, [0304] characterized in that [0305] the inorganic material, in particular the glass or glass ceramic material has pores (1101) in its volume area, in particular bubble-shaped pores (1101).

[0306] 42. Feedthrough according to proposition 41, [0307] characterized in that [0308] the share of pores (1101) in the volume of the inorganic glass or glass ceramic material is in the range of 10 volume-% to 45 volume-%, preferably 18 volume-% to 42 volume-%.

[0309] 43. Feedthrough according to one of the proposition 30 to 42, [0310] characterized in that [0311] glass or glass ceramic material (1020) forms a glass-metal bond with end face (1052) of the raised or lowered region of the housing region, said bond being free of pores at least in the outside circumferential region of the lowered region.

[0312] 44. Feedthrough according to one of the proposition 30 to 43, [0313] characterized in that [0314] the surface of the glass or glass ceramic material (1020) is positioned on the surface facing away from the interior of the housing, in a plane with the surface of the conductor.

[0315] 45. Feedthrough according to one of the proposition 30 to 44, [0316] characterized in that [0317] the conductor (1005), in particular the metal pin, preferably the contact pin, in particular the cap-shaped element includes an indentation.

[0318] 46. Feedthrough according to one of the proposition 30 to 45, [0319] characterized in that [0320] raised or lowered region (1003) progresses in a such a way that a constriction is created.

[0321] 47. Feedthrough according to one of the proposition 30 to 46, [0322] characterized in that [0323] the raised or lowered region provides a glazing length L.

[0324] 48. Feedthrough according to one of the proposition 30 to 47, [0325] characterized in that [0326] the raised or lowered region includes a flexible flange or connects to a flexible flange.

[0327] 49. Feedthrough according to proposition 48, [0328] characterized in that [0329] the flexible flange includes a connection region to connect the flange to a housing part, in particular to a battery housing part.

[0330] 50. Electrical storage device, in particular a battery or capacitor, in particular a micro-battery, comprising at least one feedthrough according to one of the propositions 30 to 49.

[0331] 51. Electrical storage device according to proposition 50, [0332] characterized in that [0333] the electrical storage device has a total height not exceeding 5 mm, in particular not exceeding 4 mm, preferably not exceeding 3 mm, in particular in the range of 1 mm to 5 mm, preferably 1 mm to 3 mm.

[0334] 52. Electrical storage device according to one of the propositions 50 to 51, [0335] characterized in that [0336] the electrical storage device includes a contact device (1400), in particular a contact flag.

[0337] 53. Electrical storage device according to one of the propositions 50 to 52, [0338] characterized in that [0339] contact device (1400), in particular the contact flag, is electrically connected [0340] with the conductor, in particular with metal pin (1010), and is electrically insulated from the housing via the inorganic material, in particular the glass or glass ceramic material which covers a partial surface of the housing component.

[0341] 54. Electrical storage device according to proposition 53, [0342] characterizes in that [0343] that the thickness of the glass or glass ceramic material between the contact device, in particular contact flag (1400) and the partial surface of the housing component is in the region of 0.1 mm to 1.0 mm, in particular 0.1 mm to 0.7 mm.

[0344] 55. Electrical storage device according to one of the propositions 50 to 54, [0345] characterized in that [0346] the electrical storage device has a housing which is connected via a flange, in particular a flexible flange with the feedthrough according to one of the propositions 30 to 49.

[0347] 56. Electrical storage device according to proposition 55, [0348] characterizes in that [0349] the flange, in particular the flexible flange is connected with the battery housing by means of welding, in particular laser welding or soldering.

[0350] 57. Electrical storage device according to proposition 56, [0351] characterizes in that [0352] the flange is connected with the battery housing in such a way, the connection is substantially gas impermeable, and that the He leakage rate is preferably less than 1.Math.10.sup.−8 mbar l/s at 1 bar pressure difference.

[0353] 58. Electrical storage device according to one of the propositions 50 to 57, [0354] characterized in that [0355] the material of the storage device—at least for the housing region which is in contact with the inorganic material, in particular the glass or glass ceramic material—is a metal, in particular iron, an iron alloy, an iron-nickel alloy, an iron-nickel-cobalt alloy, Kovar, steel, stainless steel, high-grade steel, ferritic high-grade steel, aluminum, an aluminum alloy, AlSiC, magnesium, a magnesium alloy, titanium or a titanium alloy.

[0356] While this invention has been described with respect to at least one embodiment, the present invention can be further modified within the spirit and scope of this disclosure. This application is therefore intended to cover any variations, uses, or adaptations of the invention using its general principles. Further, this application is intended to cover such departures from the present disclosure as come within known or customary practice in the art to which this invention pertains and which fall within the limits of the appended claims.