Electric stored energy source

Abstract

An electric stored energy source for a motor vehicle has a housing that defines an inner chamber in which electrochemical components of an energy storage cell are accommodated, and a line extending through the inner chamber and via which a coolant or a heating medium can be guided through the inner chamber.

Claims

1. An electrical energy storage cell, comprising: two poles; a housing, which defines an interior of the housing, in which electrochemical components of the electrical energy storage cell of a motor vehicle are held; and a line that runs through the interior of the housing and via which a cooling or heating medium, wherein the housing has a multiplicity of outer faces, the line is conductible through the interior of the housing adjacent to the outer faces, the multiplicity of outer faces define a cuboid, the two poles are on the same outer surface, and the electrochemical components wrap around the line.

2. The electrical energy storage cell according to claim 1, wherein the line runs through the interior in a straight line or in a bent manner.

3. The electrical energy storage cell according to claim 1, wherein the line is made of an electrically non-conductive material or a material with an electrical conductivity lower than 2.8*10{circumflex over ( )}6 S/m.

4. The electrical energy storage cell according to claim 1, wherein the one outer face is formed by a cover, which closes the housing.

5. The electrical energy storage cell according to claim 1, wherein the outer face at which the line enters the housing is formed by a cover, which closes the housing.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) FIGS. 1A and 1B show a first preferred embodiment of an energy storage cell according to the invention, wherein FIG. 1A illustrates a sectional view along a sectional line 1a-1a shown in FIG. 1B;

(2) FIGS. 2A and 2B show a second preferred embodiment of an energy storage cell according to the invention, wherein FIG. 2B illustrates a sectional view along a sectional line 2A-2A shown in FIG. 2B;

(3) FIGS. 3A and 3B show a third preferred embodiment of an energy storage cell according to the invention, wherein FIG. 3A illustrates a sectional view along a sectional plane 3a-3a shown in FIG. 3B.

DETAILED DESCRIPTION OF THE DRAWINGS

(4) FIGS. 1A and 1B show a first preferred embodiment of an energy storage cell 1 according to the invention, wherein said energy storage cell has a housing 2.

(5) The housing 2 preferably comprises a cover 21 and a housing container 22, which is closed by the cover 21. The cover 21 and/or the housing container 22 may be made from a metal or a plastic.

(6) The housing 2 defines an interior 23, in which electrochemical components of the energy storage cell 1 according to the invention are held.

(7) The energy storage cell is preferably a lithium ion energy storage cell and contains a first electrode strip (transition metal structure) and a second electrode strip (carbon structures), wherein the two electrode strips are isolated from one another by way of a separator. The two electrode strips are wound together with the separator to form a wound structure 3 and are each electrically connected to an electrode 31, 32.

(8) Furthermore, the interior of the housing 2 is filled with a nonaqueous electrolyte solution, which makes it possible for the lithium ions to migrate during charging/discharging of the electrical energy storage cell.

(9) The housing 2 is formed overall as a cuboid, wherein the cover 21 forms an outer face of a multiplicity of outer faces that define the cuboid.

(10) On the outer face formed by the cover 21 sit a first contact-making pole 4 and a second contact-making pole 5 at which the energy storage cell 1 according to the invention is contact-connected or connected as intended. If the cover is made from a metal, the first contact-making pole 4 and the second contact-making pole 5 are secured to the cover with the interposition of isolators and are each electrically connected through to the electrodes 31, 32 by way of corresponding passages.

(11) According to the invention, a line 6 pierces through the first contact-making pole 4, runs in the interior 3 in a straight line up to a side opposite the cover 21, from there along the opposite side, and, from a certain point, back in a straight line in the direction of the cover 21, where it likewise pierces through the second contact-making pole 5 and leads to the outside. The course is selected in this embodiment so that the line 6 runs in the interior 23 on an outer surface of the wound structure 3 and not through it.

(12) The course of the line 6 in the interior 23 could also be different.

(13) The line 6 is preferably made of an electrically isolating material or at least of a material with poor electrical conductivity, such as titanium, for example.

(14) FIG. 1B shows that the line 6 pierces in each case through the center of the first contact-making pole 4 and the second contact-making pole 5.

(15) The line 6 can be connected to a cooling and/or heating system (not shown) as intended such that a liquid can pump through the line 6 for the purpose of cooling/heating the energy storage cell 1.

(16) Owing to the inventive arrangement of the line 6, installation space outside of the energy storage cell 1 can be saved and at the same time the area where it is necessary can be cooled or heated very well.

(17) FIGS. 2A and 2B show a second preferred embodiment of an energy storage cell 1′ according to the invention. Such elements that are identical to those of the first preferred embodiment have the same reference signs and are not explained again.

(18) The second preferred embodiment differs from the first in particular in the design of the line 6′, which, as shown in FIG. 2, pierces through the center of the cover 21 and runs in a straight line to a side opposite the cover 21, where it in turn pierces through the housing 2 and leads to the outside.

(19) As can be seen in the corresponding figure, the line 6′ does not pierce through any of the contact-making poles 4′, 5′, which therefore do not have any openings and are contact-connected to the respective electrodes by way of a very small aperture in the cover 21.

(20) FIG. 2B furthermore shows that in said second preferred embodiment the line 6′ runs through the wound structure 3.

(21) FIGS. 3A and 3B show a third preferred embodiment of an electrical energy storage cell 1″ according to the invention. Such elements that are identical to those of the first and second preferred embodiment again have the same reference signs and are not explained again.

(22) The essential difference of the third preferred embodiment consists in the shape of the housing 2″, which, as shown in FIG. 3, is designed as a pipe. The electrochemical components 3 are in this preferred embodiment likewise designed as a wound structure, so that they are inserted into the pipe in a flush manner.

(23) In this preferred embodiment, the line 6 will likewise pass through the center of the wound structure 3, wherein the line 6″ enters the pipe at a first end side 24 and exits the pipe at a second end side 25.

(24) In all of the preferred embodiments, the respective line can be connected to the already mentioned cooling and/or heating system in such a way that a liquid can be pumped through the line for cooling/heating the energy storage cell. A corresponding method for operating the energy storage cells mentioned can be carried out depending on the ambient temperature of the corresponding energy storage cell.

(25) The ambient temperature is preferably detected by a temperature sensor (not shown), which is arranged, for example, on the cover 21 or the pipe.

(26) Depending on the level of the measured ambient temperature, a decision can be made as to whether the corresponding energy storage cell is to be cooled or heated.

(27) The foregoing disclosure has been set forth merely to illustrate the invention and is not intended to be limiting. Since modifications of the disclosed embodiments incorporating the spirit and substance of the invention may occur to persons skilled in the art, the invention should be construed to include everything within the scope of the appended claims and equivalents thereof.