DEVICE FOR PRODUCING AN ENERGY STORE

Abstract

A device for producing an energy store comprises a plurality of modules, the modules comprising a first electrode module, a second electrode module and a stack module. The energy store comprises a cell, the cell containing a first electrode, a second electrode and a separating layer, wherein the separating layer is arranged between the first electrode and the second electrode. The first electrode module comprises a first screen printing device for producing the first electrode and the second electrode module comprises a second screen printing device for producing the second electrode.

Claims

1. A device for producing an energy store comprising a plurality of modules, the plurality of modules comprising a first electrode module, a second electrode module and a stack module, wherein the energy store comprises a cell, wherein the cell comprises a first electrode, a second electrode, and a separating layer, wherein the separating layer is arranged between the first electrode and the second electrode, wherein the first electrode module comprises a first screen printing device for producing the first electrode and the second electrode module comprises a second screen printing device for producing the second electrode.

2. The device of claim 1, wherein the device contains a separating layer module, wherein the separating layer module contains a third screen printing device for producing the separating layer.

3. The device of claim 1, wherein the energy store contains at least one of a first collector and a second collector, wherein the first collector is arranged on an opposite side of the first electrode with respect to the separating layer, wherein the second collector is arranged on an opposite side of the second electrode with respect to the separating layer.

4. (canceled)

5. The device of claim 1, wherein the first screen printing device comprises a first printing pad and a first printing screen, which has a first frame comprising a first lattice structure for receiving a first paste, wherein a first application device is configured for applying the first paste to the first lattice structure, wherein the first lattice structure has recesses or openings which are configured to be filled with the first paste, wherein a first extraction element is provided for extracting the first paste from the openings or recesses in the first lattice structure onto the first printing pad, wherein the first lattice structure can be separated from the first paste after extraction the first paste with the first frame and the first paste remains on the first printing pad, wherein the first electrode is obtainable by drying the first paste in a first drying unit.

6. The device of claim 1, wherein the second screen printing device comprises a second printing pad and a second printing screen, which has a second frame comprising a second lattice structure for receiving a second paste, wherein a second application device is configured for applying the second paste to the second lattice structure, wherein optionally by means of a second distribution device belonging to the second screen printing device, the second paste is distributed on the second lattice structure, wherein the second lattice structure has recesses or openings which can be filled with the second paste, wherein a second extraction element for extracting the second paste is provided from the openings or recesses of the second lattice structure on the second printing pad, wherein the second lattice structure can be separated after extraction of the second paste from the second paste with the frame and the second paste remains on the second printing pad, wherein the second electrode can be obtained by drying the second paste in a second drying unit.

7. The device of claim 1, comprising a third screen printing device for producing the separating layer, wherein the third screen printing device comprises a third printing pad and a third printing screen which has a third frame which contains a third lattice structure for receiving a third paste, wherein at least the third lattice structure is configured to be filled with the third paste in order to form the separating layer, wherein the third paste is configured to be applied by a third application device to the third lattice structure, wherein a third distribution device belonging to the third screen printing device is configured to distribute the third paste on the third lattice structure, wherein the third lattice structure has recesses or openings which can be filled with the third paste, wherein a third extraction element for extracting the third paste from the openings or recesses of the third lattice structure onto the third printing pad is provided, wherein the third lattice structure is separable after extraction of the third paste with the third frame from the third paste and the third paste remains on the third printing pad, wherein the separating layer can be obtainable by drying the third paste in a third drying unit.

8. The device of claim 1, wherein at least one of the first electrodes or the second electrodes consists of a plurality of layers.

9. The device of claim 1, wherein at least one of the first electrode and the second electrode has a thickness of 1 μm up to and including 300 μm.

10. The device of claim 1, wherein the energy store contains a plurality of cells which form at least one cell stack, wherein the cell stack can be provided with least a first and a second cell, wherein an intermediate layer can be arranged between the first and second cells, wherein the intermediate layer separates a first collector for the first electrode of the first cell from a second collector for the second electrode of the second cell, so that a total voltage between the first collector and the second collector results from a sum of the cell voltages of the first and second cell.

11. (canceled)

12. The device of claim 1, wherein the first or second electrode or the separating layer contains a porous material.

13. The device of claim 1, wherein a plurality of corresponding first or second electrodes or separating layers for a plurality of cells are arranged side by side on a first printing pad or on a second printing pad or on a third printing pad.

14. An energy store comprising a housing, a first collector, a first electrode, a separating layer, a second electrode, a second collector, wherein the housing comprises a housing element, wherein the housing element comprises an element from the group consisting of a housing base, a housing lid and at least one housing side element, wherein the first collector is arranged on the housing base, wherein the first electrode is arranged on the first collector, wherein the separating layer is arranged on the first electrode, wherein the second electrode is arranged on the separating layer, wherein the second collector is arranged on the second electrode, wherein the housing lid is arranged on the second collector, characterized in that at least the first electrode is configured as a screen-printed electrode, the separating layer is configured as a screen-printed separating layer and the second electrode is configured as a second screen-printed electrode, wherein the first collector is arranged next to the housing base and is arranged partially within the at least one housing side element, wherein the second collector is arranged adjacently to the housing lid and partially within the at least one housing side element.

15. The energy store of claim 14, wherein at least one of the first or second electrodes contains a plurality of screen-printed electrode sub-layers, wherein a composition of the first screen-printed electrode sub-layer can differ from the composition of a second screen-printed electrode sub-layer.

16. (canceled)

17. The energy store of claim 14, wherein at least one of the first or second collectors or the housing contains a screen-printed collector layer or at least one screen printed housing element.

18. (canceled)

19. The energy store of claim 14, wherein the housing contains a liquid electrolyte or at least the separating layer contains a solid electrolyte.

20. A method for producing an energy store, wherein the energy store comprises a cell, a first collector and a second collector, wherein the cell has a first electrode, a second electrode and a separating layer, wherein the separating layer is arranged between the first electrode and the second electrode, wherein the first electrode is produced by means of a first screen printing device, wherein the second electrode is produced by means of a second screen printing device, wherein the first electrode is placed on a first collector, wherein the separating layer is applied on the first electrode, wherein the second electrode is applied on the separating layer and wherein the second collector is placed on the second electrode, wherein the separating layer can be produced by means of a third screen printing device and wherein at least one of the first collector and the second collector can be produced by means of a first collector screen printing device or a second collector screen printing device.

21. (canceled)

22. (canceled)

23. (canceled)

24. The method of claim 20, wherein at least one of a first electrode module, a second electrode module, a separating layer module, a first collector module and a second collector module is provided, wherein the first electrode module contains the first screen printing device, optionally a first drying unit and a first stacking device, by means of which the first electrode is screen printed, optionally dried and placed on the first collector, wherein the second electrode module contains the second screen printing device, optionally a second drying unit, by means of which the second electrode is screen printed, and optionally dried, wherein the separating layer module contains the third screen printing device, optionally a third drying unit and a third stacking device, by means of which the separating layer is screen printed, optionally dried, and placed on the first electrode, wherein the first collector module contains the first collector screen printing device, optionally a first collector drying unit and a first collector stacking device, by means of which the first collector is screen-printed, optionally dried and placed on a housing element, wherein the second collector module contains the second collector screen printing device, optionally a second collector drying unit and a second collector stacking device, by means of which the second collector is screen-printed, optionally dried and placed on the second electrode.

25. (canceled)

26. (canceled)

27. The method of claim 24, wherein the second electrode module contains a second stacking device, by means of which the screen-printed and optionally dried second electrode is placed on the separating layer.

28. (canceled)

29. (canceled)

30. The method of claim 20 wherein a housing element module is provided which contains a housing element screen printing device, by means of which at least one housing element is screen printed, wherein the housing element module can include at least one of a housing element drying device or a housing element stacking device.

31. (canceled)

32. (canceled)

33. The method of claim 20, wherein at least one of the first electrodes, the second electrodes or the separating layers is compressed after drying.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0129] The device according to the invention is illustrated below in a few exemplary embodiments. It is shown in:

[0130] FIG. 1 a view of a cell of an energy store according to a first embodiment,

[0131] FIG. 2 a screen printing device for producing a first electrode of an energy store according to FIG. 1,

[0132] FIG. 3 a screen printing device for producing a second electrode of an energy store according to FIG. 1,

[0133] FIG. 4 a screen printing device for producing a separating layer of an energy store according to FIG. 1.

[0134] FIG. 5 a view of an energy store according to a second embodiment,

[0135] FIG. 6 a schematic illustration of a device for producing an energy store,

[0136] FIG. 7a view of an energy store according to a third embodiment,

[0137] FIG. 7b an exploded view of the individual layers of the energy store shown in FIG. 7a,

[0138] FIG. 8a view of an energy store according to a fourth embodiment,

[0139] FIG. 8b an exploded view of the individual layers of the energy store shown in FIG. 8a,

[0140] FIG. 9 a view of an energy store module,

[0141] FIG. 10 a schematic view of an accumulator containing an energy store module according to a first embodiment,

[0142] FIG. 11 a schematic view of an accumulator containing an energy store module according to a second embodiment,

[0143] FIG. 12 a schematic view of an accumulator containing a plurality of energy store modules according to a third embodiment.

DETAILED DESCRIPTION OF THE DRAWINGS

[0144] FIG. 1 shows an energy store 5 containing a cell 8 according to a first embodiment. The cell 8 comprises a first electrode 1 and a second electrode 2. A separating layer 20 is arranged between the first electrode 1 and the second electrode 2. The first electrode 1 comprises a first collector 40. The second electrode 2 comprises a second collector 50.

[0145] FIG. 2 shows a first screen printing device, which represents an embodiment of a first electrode module for producing a first electrode 1 of an energy store 5 according to FIG. 1. The screen printing device for producing an energy store 5 comprises a first printing pad 3, wherein the first printing pad 3 is configured for applying a first paste 11 for producing a first electrode 1 (see FIG. 1) of the energy store 5. The first screen printing device comprises a first printing screen 4 which has a first frame 6 which contains a first lattice structure 21 for receiving a first paste 11 for the first electrode 1 of the energy store 5. The first paste 11 can be distributed on the first lattice structure 21 by means of a first distribution device 7 belonging to the first screen printing device, and recesses or openings in the first lattice structure 21 can be filled with the first paste 11.

[0146] FIG. 3 shows a second screen printing device for producing a second electrode 2 of an energy store 5 according to FIG. 1. The second screen printing device comprises a second application device 29 containing a second paste 12. The second frame 16 is configured to accommodate a second lattice structure 22, wherein the second paste 12 is configured to be applied to the second lattice structure 22 for the second electrode 2 by means of the second application device 29. The second distribution device 17 is configured to distribute the second paste 12 on the second lattice structure 22 on the second printing pad 13. Recesses or openings in the second lattice structure 22 are configured to be filled with the second paste 12.

[0147] FIG. 4 shows a third screen printing device for producing a separating layer 20 of an energy store 5 according to FIG. 1. The third screen printing device comprises a third application device 39 containing a third paste 32.

[0148] The third frame 36 is configured to accommodate a third lattice structure 31, wherein the third paste 32 has been applied to the third lattice structure 31 for the separating layer 20 by means of the third application device 39. The distribution device 37 is configured to distribute the third paste 32 on the third lattice structure 31 on the third printing pad 33. Recesses or openings in the third lattice structure 31 can be filled with the third paste 32.

[0149] FIG. 5 shows a view of an energy store module 30 according to a second embodiment. The energy store module 30 contains a cell stack 9 which includes a plurality of cells 8 and a first collector 40 and a second collector 50. The first and second collector 40, 50 are connected to an electrical circuit, not shown, which contains at least one consumer. The cell stack 9 shown in FIG. 5 contains a plurality of cells 8. According to the embodiment shown in FIG. 5, three cells 8 are provided. Each of the cells 8 consists of a first electrode 1 and a second electrode 2. A separating layer 20 is arranged between the first electrode 1 and the second electrode 2. The first electrode 1 comprises the first paste 11. The second electrode 2 comprises the second paste 12. The separating layer 20 is formed by the third paste 32. The separating layer serves to separate the first paste 11 from the second paste 12 but allows electrons to flow or transport ions from the first paste 11 into the second paste 12. The separating layer 20 is also referred to as a separator layer. The separating layer 20 can in particular be porous or contain a porous material. When the cell 8 is immersed in a liquid electrolyte, the separating layer 20 is permeable to the liquid electrolyte. The separating layer 20 can contain a solid electrolyte or consist of a solid electrolyte.

[0150] An intermediate layer 44 is arranged between adjacent cells 8. The intermediate layer 44 also enables a flow of electrons from one of the cells 8 to the adjacent cell or cells 8. The intermediate layer 44 can comprise at least one electrically conductive material for allowing an electron flow between two adjacent cells 8.

[0151] According to FIG. 5, the first electrode 1 of a second and each additional cell 8 is produced in the same way as the first electrode 1 of the cell 8 arranged at the bottom in FIG. 5. Therefore, at this point, reference should be made to the features of the energy store mentioned in the previous embodiments. The cells 8 are connected in series such that a series connection is obtainable. A series connection can be used if the electrical voltage applied to the first and second collectors 40, 50 is to be increased. Alternatively, the intermediate layer 44 can be configured as a multi-layered intermediate layer, which is shown for an example in FIG. 9. The intermediate layer 44 can also consist of a single, electrically conductive layer, which is shown in FIG. 10.

[0152] A device 10 for producing an energy store 5 according to FIG. 6 comprises a plurality of modules for producing a cell 8 of the energy store 5. The modules comprise a first electrode module, a second electrode module and a stack module. The cell comprises a first collector 40, a first electrode 1, a second electrode 2, a second collector 50 and a separating layer 20. The separating layer 20 is arranged between the first electrode 1 and the second electrode 2, wherein the first collector 40 is arranged on an opposite side of the first electrode 1 with respect to the separating layer 20, wherein the second collector 50 is arranged on an opposite side of the second electrode 2 with respect to the separating layer 20. The first electrode module comprises a first screen printing device 41 for producing the first electrode 1 and the second electrode module comprises a second screen printing device 42 for producing the second electrode 2.

[0153] According to an embodiment, the first screen printing device 41, as shown in in FIG. 2, comprises a first printing pad 3 and a first printing screen 4, which is provided with a first frame 6 containing a first lattice structure 21 for receiving a first paste 11. A first application device 19 is configured to apply the first paste 11 to the first lattice structure 21. If necessary, the first paste 11 is distributed on the first lattice structure 21 by means of a first distribution device 7 belonging to the first screen printing device 41. The first lattice structure 21 is provided with recesses or openings which are configured to be filled with the first paste 11. A first extraction element 18 is provided for extracting the first paste 11 from the openings or recesses in the first lattice structure 21 onto the first printing pad 3. After extraction of the first paste 11 with the first frame 6, the first lattice structure 21 is configured to be separable from the first paste 11 and the first paste 11 can remain on the first printing pad 3.

[0154] In particular, the first electrode 1 is configured to be obtained by drying the first paste 11 in a first drying unit 15.

[0155] According to an embodiment, as shown schematically in FIG. 3, the second screen printing device 42 comprises a second printing pad 13 and a second printing screen 14, which is provided with a second frame 16 containing a second lattice structure 22 for receiving a second paste 12. In particular, a second application device 29 can be configured to apply the second paste 12 to the second lattice structure 22. If necessary, the second paste 12 can be distributed on the second lattice structure 22 by means of a second distribution device 17 belonging to the second screen printing device 42, wherein the second lattice structure 22 is provided with recesses or openings which are configured to be filled with the second paste 12. A second extraction element 28 can be provided for extracting the second paste 12 from the openings or recesses of the second lattice structure 22 onto the second printing pad 13. After extraction of the second paste 12 with the second frame 16, the second lattice structure 22 is configured to be separable from the second paste 12 and the second paste 12 can remain on the second printing pad 13.

[0156] According to an embodiment, the second electrode 2 is obtainable by drying the second paste 12 in a second drying unit 25. In particular, the first paste 11 can differ from the second paste 12.

[0157] In particular, the third screen printing device 43 can include a third printing pad 33 and a third printing screen 34, which is provided with a third frame 36 containing a third lattice structure 31 for receiving a third paste 32, wherein at least the third lattice structure 31 is configured to be filled with the third paste 32, to form the separating layer 20, wherein the third paste 32 is applied to the third lattice structure 31 by a third application device 39, wherein the third paste 32 is configured to be distributed on the third lattice structure 31 by means of the third distribution device 37 belonging to the third screen printing device 43.

[0158] The third lattice structure 31 is configured to be provided with recesses or openings which are configured to be filled with the third paste 32. A third extraction element 38 can be provided for extracting the third paste 32 from the openings or recesses of the third lattice structure 31 onto the third printing pad 33. After extraction of the third paste 32 with the third frame 36, the third lattice structure 31 can be separable from the third paste 32 and the third paste 32 can remain on the third printing pad 33. In particular, the separating layer is obtainable by drying the third paste 32 in a third drying unit 35.

[0159] According to an embodiment, at least one of the first electrodes 1 or the second electrodes 2 can consist of a plurality of layers. In particular, according to an embodiment, the first electrode 1 can have a thickness of 10 μm up to and including 300 μm. In particular, according to an embodiment, the second electrode 2 can have a thickness of 10 μm up to and including 300 μm. In particular, according to an embodiment, the separating layer 20 can have a thickness of 1 μm up to and including 50 μm. In particular, according to an embodiment, the first collector 40 can have a thickness of 1 μm up to and including 50 μm. In particular, according to an embodiment, the second collector 50 can have a thickness of 1 μm up to and including 50 μm.

[0160] In particular, according to an embodiment, the first collector 40 can consist of aluminum or an aluminum compound. According to this exemplary embodiment, the first collector 40 is configured as a positive collector. In particular, according to an embodiment, the second collector 50 can be made of copper or a copper compound. According to this exemplary embodiment, the second collector 50 is configured as a negative collector.

[0161] In particular, according to an embodiment, the first paste 11 of the first electrode 1 can have a mass fraction of active mass of 50% up to and including 90%, wherein the remaining mass fraction comprises a binding material and/or a solvent and/or a conductive additive.

[0162] In particular, according to an embodiment, the second paste 12 of the second electrode 2 can have a mass fraction of active mass of 50% up to and including 90%, wherein the remaining mass fraction comprises a binding material and a conductive additive.

[0163] In particular, according to an embodiment, the separating layer 20 can consist of two cover layers made of polypropylene and an intermediate layer made of polyethylene arranged between the two cover layers. According to this embodiment, the thickness of the separating layer 20 can, in particular, amount to 38 μm.

[0164] In particular, according to an embodiment, the separating layer 20 can contain an electrolyte which consists of 50 mol % LiPF.sub.6 and 50 mol % of a mixture of ethylene carbonate (EC) and diethyl carbonate (DEC).

[0165] In particular, according to an embodiment, the energy store 5 can contain a plurality of cells 8 that are configured as at least one cell stack 9, as shown in FIG. 5. In particular, according to an embodiment, the plurality of cells 8 can be arranged in a parallel connection or in a series connection. An operating voltage of at least 12 V may be available for a series connection.

[0166] In particular, according to an embodiment, the cell stack 9 is configured to have at least a first and a second cell 8, wherein an intermediate layer is arranged between the first and second cell 8, wherein the intermediate layer separates the collector for the first electrode of the first cell from the collector for the second electrode of the second cell, so that a total voltage between the first collector 40 and the second collector 50 results from the sum of the cell voltages of the first and second cell 8. In particular, according to an embodiment, the intermediate layer can be electrically conductive, so that a current flow or ion flow can take place from the first cell 8 to the second cell 8.

[0167] In particular, according to an embodiment, the cell 8 is configured to contain an electrolyte. In particular, the electrolyte is configured to be contained in the first or second paste 11, 12 or in the separating layer 20 according to an embodiment.

[0168] In particular, according to an embodiment, the first or second electrode 1, 2 and the separating layer 20 can be stacked in the cell 8 such that the separating layer 20 is arranged above the first electrode 1 and the second electrode 2 is arranged above the separating layer 20. According to this embodiment, the separating layer 20 lies on the first electrode 1.

[0169] In particular, according to an embodiment, the first or second electrode 1, 2 or the separating layer 20 can contain a porous material.

[0170] In particular, the first or second collector 40, 50 according to an embodiment can at least partially form a housing. In particular, according to an embodiment, the first or second collector can at least partially be configured as a cooling element.

[0171] In particular, according to an embodiment, a plurality of corresponding first or second electrodes 1, 2 or separating layers 20 for a plurality of cells 8 can be arranged next to one another on the first printing pad 3 or the second printing pad 13 or the third printing pad 33.

[0172] A method for producing an energy store 5 is described below. The energy store 5 comprises a cell 8, or a plurality of cells 8, wherein the cell 8 comprises a first collector 40, a first electrode 1, a second electrode 2, a second collector 50 and a separating layer 20, wherein the separating layer 20 is arranged between the first electrode 1 and the second electrode 2, wherein the first collector 40 is arranged on a side of the first electrode 1 opposite the separating layer 20, wherein the second collector 50 being arranged on a side of the second electrode 2 opposite the separating layer 20, wherein the first electrode 1 is produced by means of a first screen printing device 41 and the second electrode 2 is produced by means of a second screen printing device 42.

[0173] According to an embodiment, the first screen printing device 41 can comprise a first printing pad 3 and a first printing screen 4, which has a first frame 6, which contains a first lattice structure 21 for receiving a first paste 11, wherein the first paste can be applied to the first lattice structure 21 by means of a first application device 19. If necessary, the first paste 11 can be distributed on the first lattice structure 21 by means of a first distribution device 7 belonging to the first screen printing device 41, wherein the first lattice structure 21 is provided with recesses or openings which are filled with the first paste 11. The first paste 11 is removed from the openings or recesses of the first lattice structure 21, in particular by means of a first extraction element 18, and applied to the first printing pad 3, wherein the lattice structure 21 is separated from the paste 11 with the first frame 6 after the first paste 11 has been extracted and the first paste 11 remains on the first printing pad 3. According to an embodiment, the first electrode 1 can be obtained by drying the first paste 11 in a first drying unit 15.

[0174] According to an embodiment, the second screen printing device 42 can comprise a second printing pad 13 and a second printing screen 14, which has a second frame 16 that contains a second lattice structure 22 for receiving a second paste 12, wherein the second paste 12 can be applied by means of a second application device 29 to the second lattice structure 22, wherein the second paste 12 is optionally distributed on the second lattice structure 22 by means of a second distribution device 17 belonging to the second screening device 42, wherein the second lattice structure 22 is provided with recesses or openings which are filled with the second paste 12. The second paste 12 can be removed from the openings or recesses of the second lattice structure 22 by means of a second extraction element 28 and applied to the second printing pad 13. After extraction of the second paste 12 with the second frame 16, the second lattice structure 22 can be separated from the second paste 12 and the second paste 12 remains on the second printing pad 13.

[0175] According to an embodiment, the second electrode 2 can be obtained by drying the second paste 12 in a second drying unit 25. In particular, the first paste 11 can differ from the second paste 12.

[0176] According to an embodiment, the separating layer 20 can be produced by means of a third screen printing device 43. According to an embodiment, the third screen printing device 43 can include a third printing pad 33 and a third printing screen 34, which has a third frame 36 that contains a third lattice structure 31 for receiving a third paste 32, wherein at least the third lattice structure 31 is filled with the third paste 32 to form the separating layer 20. According to an embodiment, the third paste 32 can be applied to the third lattice structure 31 by means of a third application device 39. According to an embodiment, the third paste 32 can be distributed on the third lattice structure 31 by means of the third distribution device 37 belonging to the third screen printing device 43. According to an embodiment, the third lattice structure 31 can be provided with recesses or openings which are filled with the third paste 32. According to an embodiment, the third paste 32 can be removed from the openings or recesses in the third lattice structure 31 by means of a third extraction element 38 and applied to the third printing pad 33. According to an embodiment, the third lattice structure 31 can be separated from the third paste 32 with the third frame 36 after the third paste 32 has been extracted and the third paste 32 can remain on the third printing pad 33.

[0177] FIG. 7a shows a view of an energy store according to a third embodiment. The energy store comprises a housing 60, a first collector 40, a first electrode 1, a separating layer 20, a second electrode 2, a second collector 50. The housing 60 comprises a housing element, wherein the housing element comprises an element from the group consisting of a housing base 61, a housing lid 62 and at least one housing side element 63, 64, 65, 66, 67, wherein the first collector 40 is arranged on the housing base 61, wherein the first electrode 1 is arranged on the first collector 40, wherein the separating layer 20 is arranged on the first electrode 1, wherein the second electrode 2 is arranged on the separating layer 20, wherein the second collector 50 is arranged on the second electrode 2, wherein the housing lid 62 is arranged on the second collector 50. At least the first electrode 1 is configured as a screen-printed electrode, the separating layer 20 is configured as a screen-printed separating layer and the second electrode 2 is configured as a second screen-printed electrode. The first electrode 1 is surrounded by the housing side element 64. After the first electrode 1 has been produced, the housing side element 64 can be placed on the first electrode and slipped over the first electrode 1. The housing side element 64 surrounds the first electrode 1 to form the periphery of the first electrode 1. In particular, the housing side element 64 can have a ring shape, wherein the ring can have a rectangular or circular shape.

[0178] The first collector 40 is disposed adjacent to the housing base 61 and partially disposed within the housing side element 63. The second collector 50 is formed adjacent to the housing lid 62 and is partially arranged inside a housing side element 67. At least one of the first or second collectors 40, 50 may contain a screen-printed collector layer. The housing 60 may include at least one screen-printed housing element. The energy store 5 can contain a liquid electrolyte. At least the separating layer 20 can contain a solid electrolyte. The first electrode 1 and/or the second electrode 2 can contain a solid electrolyte.

[0179] FIG. 7b shows an exploded drawing of the individual layers of the energy store 5 shown in FIG. 7a. An exemplary method for producing an energy store 5 is described using the exploded view according to FIG. 7b. The energy store 5 comprises a cell 8, a first collector and a second collector, wherein the cell 8 contains a first electrode 1, a second electrode 2 and a separating layer 20. The separating layer 20 is arranged between the first electrode 1 and the second electrode 2. The first electrode 1 is produced by means of a first screen printing device 41, the second electrode 2 is produced by means of a second screen printing device. The production of the first and second electrodes 1, 2 can take place simultaneously. The first electrode 1 is attached to a first collector 40. The separating layer 20 is applied to the first electrode 1. The second electrode 2 is arranged on the separating layer 20 and the second collector 50 is arranged on the second electrode 2.

[0180] The separating layer 20 can be produced by means of a third screen printing device 43. The first collector 40 can be produced by means of a first collector screen printing device. The second collector 50 can be produced by means of a second collector screen printing device. A first electrode module can be provided, which contains the first screen printing device 41, optionally a first drying unit 15 and a first stacking device, by means of which the first electrode is screen printed, optionally dried, and placed on the first collector 40.

[0181] A second electrode module can be provided, which contains the second screen printing device 42 and optionally a second drying unit 25, by means of which the second electrode 2 is screen printed and optionally dried. A separating layer module can be provided which contains the third screen printing device 43, optionally a third drying unit 35 and a third stacking device, by means of which the separating layer 20 is screen printed, optionally dried, and deposited on the first electrode 1. The second electrode module can contain a second stacking device, by means of which the screen-printed and optionally dried second electrode 2 and is deposited on the separating layer 20.

[0182] A first collector module can be provided, which contains the first collector screen printing device, optionally a first collector drying unit and a first collector stacking device, by means of which the first collector 40 is screen-printed, optionally dried, and placed on a housing element. A second collector module can be provided, which contains the second collector screen printing device, optionally a second collector drying unit and a second collector stacking device, by means of which the second collector is screen-printed, optionally dried, and placed on the second electrode 2. A housing element module can be provided which contains a housing element screen printing device, by means of which at least one housing element is screen printed. The housing element module may include a housing element drying device. The housing element module may include a housing element module stacking device.

[0183] FIG. 8a shows a view of an energy store according to a fourth embodiment. The energy store comprises a housing 60, a first collector 40, a first electrode 1, a separating layer 20, a second electrode 2, a second collector 50. The housing 60 comprises a housing element, wherein the housing element comprises an element from the group consisting of a housing base 61, a housing lid 62 and at least one housing side element 63, 64, 65, 66, 67, wherein the first collector 40 is arranged on the housing base 61, wherein the first electrode 1 is arranged on the first collector 40, wherein the separating layer 20 is arranged on the first electrode 1, wherein the second electrode 2 is arranged on the separating layer 20, wherein the second collector 50 is arranged on the second electrode 2, wherein the housing lid 62 is arranged on the second collector 50.

[0184] According to this embodiment, the first electrode 1 consists of a plurality of electrode sub-layers. Three electrode sub-layers are shown as an example, but two or more than three electrode sub-layers could also be provided. At least one of the electrode sub-layers, which form the first electrode 1, is configured as a screen-printed electrode sub-layer. The first electrode 1 is surrounded by the housing side element 64. After the first electrode 1 has been produced, the housing side element 64 can be placed on the first electrode and slipped over the first electrode 1. The housing side element 64 surrounds the first electrode 1 to form the periphery of the first electrode 1. In particular, the first housing side element 64 can have a ring shape, wherein the ring may have a rectangular or circular shape.

[0185] According to this embodiment, the separating layer 20 consists of a plurality of separating sub-layers. Two separating sub-layers are shown as an example, but three or more than three separating sub-layers could also be provided. The composition of each of the separating sub-layers may differ. The thickness of each of the separating sub-layers may differ from the thickness of another separating sub-layer. At least one of the separating sub-layers forming the separating layer 20 is configured as a screen-printed separating sub-layer. The housing side element 65 can be placed on the separating layer 20 after the production of the separating layer 20 and slipped over the separating layer 20. The housing side element 65 surrounds the separating layer 20 to form the perimeter of the separating layer 20. In particular, the housing side element 65 can have a ring shape, wherein the ring may have a rectangular or round shape.

[0186] According to this embodiment, the second electrode 2 consists of a plurality of electrode sub-layers. Two electrode sub-layers are shown as an example, but three or more than three electrode sub-layers could also be provided. At least one of the electrode sub-layers, which forms the second electrode 2, is configured as a second screen-printed electrode. After the second electrode 2 has been produced, the housing side element 66 can be placed on the second electrode 2 and slipped over the second electrode 2. The housing side element 66 surrounds the second electrode 2 to form the periphery of the second electrode 2. In particular, the housing side element 66 may have a ring shape, wherein the ring can have a rectangular or circular shape. An associated housing side element sub-layer can also be produced separately for each of the electrode sub-layers, which is not shown in the drawing.

[0187] The first collector 40 is disposed adjacently to the housing base 61 and partially arranged within the housing side element 63. The second collector 50 is disposed adjacent to the housing lid 62 and is partially arranged inside a housing side element 67.

[0188] At least one of the first or second electrodes 1, 2 can contain a first screen-printed electrode sub-layer, the composition of which differs from a second screen-printed electrode sub-layer. At least one of the first or second collectors 40, 50 may contain a screen-printed collector layer. The housing 60 can include at least one screen-printed housing element. The energy store 5 can contain a liquid electrolyte. At least the separating layer 20 can contain a solid electrolyte. The first electrode 1 and/or the second electrode 2 can contain a solid electrolyte.

[0189] FIG. 8b shows an exploded view of the individual layers of the energy store 5 shown in FIG. 8a. An exemplary method for producing an energy store 5 is described using the exploded view according to FIG. 8b. The energy store 5 comprises a cell 8, a first collector and a second collector, wherein the cell 8 contains a first electrode 1, a second electrode 2 and a separating layer 20. The separating layer 20 is arranged between the first electrode 1 and the second electrode 2. The first electrode 1 is produced by means of a first screen printing device 41, the second electrode 2 is produced by means of a second screen printing device. The production of the first and second electrodes 1, 2 can take place simultaneously. Each of the electrode sub-layers of the first electrode 1 can be produced sequentially by means of the first screen printing device 41. Each of the electrode sub-layers of the second electrode 2 can be produced sequentially by means of the second screen printing device 42. The first electrode 1 is attached to a first collector 40. The separating layer 20 is applied to the first electrode 1. The second electrode 2 is attached to the separating layer 20 and the second collector 50 is attached to the second electrode 2.

[0190] The separating layer 20 can be produced by means of a third screen printing device 43. Each of the separating sub-layers of the separating layer 20 can be produced sequentially by means of the third screen printing device 43. The first collector 40 can be produced by means of a first collector screen printing device. The second collector 50 can be produced by means of a second collector screen printing device. A first electrode module can be provided, which contains the first screen printing device 41, optionally a first drying unit 15 and a first stacking device, by means of which the first electrode 1 is screen printed, optionally dried and placed on the first collector 40.

[0191] A second electrode module can be provided, which contains the second screen printing device 42 and optionally a second drying unit 25, by means of which the second electrode 2 is screen printed and optionally dried. A separating layer module can be provided which contains the third screen printing device 43, optionally a third drying unit 35 and a third stacking device, by means of which the separating layer 20 is screen printed, optionally dried and deposited on the first electrode 1. The second electrode module can contain a second stacking device, by means of which the screen-printed and optionally dried second electrode 2 is deposited on the separating layer 20.

[0192] A first collector module can be provided, which contains the first collector screen printing device, optionally a first collector drying unit and a first collector stacking device, by means of which the first collector 40 is screen-printed, optionally dried and placed on a housing element. A second collector module can be provided, which contains the second collector screen printing device, optionally a second collector drying unit and a second collector stacking device, by means of which the second collector is screen-printed, optionally dried and placed on the second electrode 2. A housing element module can be provided which contains a housing element screen printing device, by means of which at least one housing element is screen printed. The housing element module can include a housing element drying device. The housing element module can include a housing element stacking device.

[0193] FIG. 9 shows a schematic view of an energy store module 30. The energy store module 30 comprises a plurality of energy stores 5. The energy stores 5 of the energy store module 30 are arranged in series with one another. For example, in FIG. 9, four energy stores 5, each containing a cell 8, are thus arranged one above the other. Only one of the energy stores 5, namely the energy store 5 located at the bottom in the drawing, is indicated in FIG. 9. Each of the energy stores 5 consists of a first collector 40, a first electrode 1 arranged above the first collector, a separating layer 20 arranged on the first electrode 1, a second electrode 2 arranged on the separating layer 20 and a second collector 50 arranged on the second electrode 2.

[0194] According to this embodiment, the intermediate layer 44 contains three electrically conductive layers, a first conductive layer for connection to the second electrode 2, a second conductive middle layer for connection of the first conductive layer to a third conductive layer, which in turn is connected to the first electrode 1 there above. With regard to the concept of the energy store 5 introduced earlier, the intermediate layer 44 thus forms its second collector. In other words, the energy store module according to FIG. 9 consists of four cells 8 and three intermediate layers 44 and a first collector 40, which forms the bottom layer, and a second collector 50, which forms the top layer. The energy store module is usually accommodated in a housing, which is omitted from this illustration. Any contacts of the first and second collectors, which enable a current to flow in an electric circuit containing at least one consumer, are also omitted in this illustration for the sake of simplicity.

[0195] The number of energy stores 5 can be chosen to be as large as desired, wherein the energy stores 5 of the energy store module 30 are arranged in a series connection with one another. Such a series connection of energy stores 5 can advantageously be used when a larger voltage is required.

[0196] FIG. 10 shows a schematic view of an accumulator containing an energy store module 30. The energy store module 30 comprises a plurality of energy stores 5. The energy stores 5 of the energy store module 30 are arranged in series with one another. As in FIG. 9, four energy stores 5, each containing a cell 8, are arranged one above the other. Each of the energy stores 5 consists of a first collector 40, a first electrode 1 arranged thereupon, a separating layer 20 arranged on the first electrode 1, a second electrode 2 arranged on the separating layer 20 and a second collector 50 arranged on the second electrode 2.

[0197] The intermediate layer 44 according to this exemplary embodiment consists of a single, electrically conductive layer. In other words, the energy store module according to FIG. 10 consists of four cells 8 and three intermediate layers 44 and a first collector 40, which forms the bottom layer, and a second collector 50, which forms the top layer. The energy store module 30 is accommodated in a housing 60. The housing 60 comprises a housing base 61, a housing lid 62 and at least one housing side element 63. A first contact 51 is also shown, which is configured to receive current from the first collector 40. A second contact 51, which is configured to receive current from the second collector 50, is also shown. The direction of the current flow depends on whether the first electrode is a positive or a negative electrode. Therefore, depending on the type of electrode, the first contact 51 can be in the form of a positive pole or a negative pole. The second contact 52 accordingly forms the opposite pole. The first and second contacts 51, 52 can be arranged on opposite sides of the housing 60, they can also be formed on the same side of the housing 60 according to the embodiments shown in FIG. 7a or FIG. 8a.

[0198] FIG. 11 shows a schematic view of an accumulator containing an energy store module 70. The energy store module 70 comprises a plurality of energy stores 5. The energy stores 5 of the energy store module 70 are arranged parallel to one another. As in FIG. 9, four energy stores 5, each containing a cell 8, are arranged one above the other. Each of the energy stores 5 consists of a first collector 40, a first electrode 1 arranged thereupon, a separating layer 20 arranged on the first electrode 1, a second electrode 2 arranged on the separating layer 20 and a second collector 50 arranged on the second electrode 2. As described in the previous embodiments, each of the first electrodes 1, second electrodes 2 or the separating layers 20 can contain a plurality of sub-layers.

[0199] Adjacent energy stores 5 are separated from one another by an insulation layer 23. The insulation layer 23 according to this embodiment consists of a single, electrically non-conductive layer. In other words, the energy store module according to FIG. 10 consists of four energy stores 5 and three insulation layers, wherein each of the energy stores 5 has a cell 8, a first collector 40, which forms the bottom layer, and a second collector 50, which forms the top layer of the energy store 5. The energy store module 70 is accommodated in a housing 60. The housing 60 comprises a housing base 61, a housing lid 62 and at least one housing side element 63. A first contact 51 is also shown, which is configured to receive current from the first collector 40. A second contact 51, which is configured to receive current from the second collector 50, is also shown. The direction of the current flow depends on whether the first electrode is a positive or a negative electrode. Therefore, depending on the type of electrode, the first contact 51 can be in the form of a positive pole or a negative pole. The second contact 52 accordingly forms the opposite pole. The first and second contacts 51, 52 can be arranged on opposite sides of the housing 60, they can also be configured to be arranged on the same side of the housing 60 according to the embodiments shown in FIG. 7a or FIG. 8a.

[0200] FIG. 12 shows a view of an accumulator containing a plurality of energy stores 5 according to a third embodiment in a parallel arrangement. Each of the energy stores 5 comprises a housing 60, a first collector 40, a first electrode 1, a separating layer 20, a second electrode 2, a second collector 50. The housing 60 comprises a housing element, wherein the housing element comprises an element from the group consisting of a housing base 61, a housing lid 62 and at least one housing side element 63, 64, 65, 66, 67, wherein the first collector 40 is arranged on the housing base 61, wherein the first electrode 1 is arranged on the first collector 40, wherein the separating layer 20 is arranged on the first electrode 1, wherein the second electrode 2 is arranged on the separating layer 20, wherein the second collector 50 is arranged on the second electrode 2, wherein the housing lid 62 is arranged on the second collector 50.

[0201] At least the first electrode 1 is configured as a screen-printed electrode, the separating layer is configured as a screen-printed separating layer and the second electrode 2 is configured as a second screen-printed electrode. The first electrode 1 is surrounded by the case side member 64. After the first electrode 1 has been produced, the housing side element 64 can be placed on the first electrode and slipped over the first electrode 1. The housing side element 64 surrounds the first electrode 1 to form the periphery of the first electrode 1. In particular, the housing side element 64 can have a ring shape, wherein the ring can have a rectangular or circular shape. The housing side element 65 can be placed on the separating layer 20 after the production of the separating layer 20 and slipped over the separating layer 20. The housing side element 65 surrounds the separating layer 20 to form the perimeter of the separating layer 20. In particular, the housing side element 65 can have a ring shape, wherein the ring can have a rectangular or circular shape. After the second electrode 2 has been produced, the housing side element 66 can be placed on the second electrode 2 and slipped over the second electrode 2. The housing side element 66 surrounds the second electrode 2 to form the periphery of the second electrode 2. In particular, the housing side element 66 can have a ring shape, where the ring can have a rectangular or circular shape.

[0202] The first collector 40 is disposed adjacent to the housing base 61 and partially disposed within the housing side element 63. The second collector 50 is formed adjacent to the housing lid 62 and is partially arranged inside a housing side element 67. At least one of the first or second collectors 40, 50 can contain a screen-printed collector layer. A first contact 51 is provided for current collection from the first collector 40. A second contact 51 is configured to receive current from the second collector 50. The housing 60 can include at least one screen-printed housing element. Each of the energy stores 5 can contain a liquid electrolyte. At least the separating layer 20 can contain a solid electrolyte. The first electrode 1 and/or the second electrode 2 can contain a solid electrolyte.

Example

[0203] A lithium-ion cell with the following structure was used to determine the energy density. The cell consists of a copper negative collector, an anode layer arranged thereon, a separating layer, a cathode layer disposed on the separating layer, and an aluminum layer disposed on the cathode layer. The collector made of copper has a thickness of 20 μm. The anode layer consists of 85% by weight active mass, 5% binder material and 10% of a conductive additive. The porosity of the anode layer is 30%. The active mass consists of graphite. The binding material consists of PVDF. The conductive additive consists of Super C65 conductive carbon black with a BET surface area of 62 m.sup.2/g, an ash content of 0.01% maximum and an iron content of 2 ppm maximum.

[0204] The separating layer has a thickness of 38 μm. The separating layer contains an electrolyte consisting of 1 mol LiPF6 and a 1:1 mixture of ethylene carbonate/diethyl carbonate.

[0205] It is obvious to a person skilled in the art that many other variants are possible in addition to the exemplary embodiments described, without departing from the inventive concept. The subject of the invention is thus not limited by the foregoing description and is to be determined by the scope of protection defined by the claims. For the interpretation of the claims or the description, the broadest possible reading of the claims is decisive. In particular, the terms “comprise” or “include” shall be construed as referring to elements, components, or steps in a non-exclusive sense, thereby indicating that the elements, components or steps may be present or used that they can be combined with other elements, components or steps that are not explicitly mentioned. When the claims relate to an element or component from a group that may consist of A, B, C to N elements or components, this language should be interpreted as requiring only a single element of that group, and not one combination of A and N, B and N or any other combination of two or more elements or components of this group.