Heat Conduction Device for an Electric Energy Storage of a Motor Vehicle

Abstract

A heat conduction device for an electrical energy storage of an at least partially electric motor vehicle includes a heat conduction element that is configured to be in contact with a battery cell of the electrical energy storage and to dissipate heat from the battery cell. A spring element is configured to exert a defined spring force between the battery cell and the heat conduction element. The heat conduction element is rotatably disposed on a holding device of the heat conduction device and the spring element is disposed on the heat conduction element and/or on the holding device such that a rotational movement of the heat conduction element is cushioned.

Claims

1.-10. (canceled)

11. A heat conduction device (14) for an electrical energy storage (10) of an at least partially electric motor vehicle (12), comprising: a heat conduction element (16) that is configured to be in contact with a battery cell of the electrical energy storage (10) and to dissipate heat (Wy) from the battery cell; a first spring element (20) that is configured to exert a defined spring force between the battery cell and the heat conduction element (16); and a holding device (24); wherein the heat conduction element (16) is rotatably disposed on the holding device (24) and wherein the first spring element (20) is disposed on the heat conduction element (16) and/or on the holding device (24) such that a rotational movement (26) of the heat conduction element (16) is cushioned.

12. The heat conduction device (14) according to claim 11, wherein the heat conduction element (16) is aluminum.

13. The heat conduction device (14) according to claim 11, wherein the holding device (24) is plastic.

14. The heat conduction device (14) according to claim 11, wherein the holding device (24) is a plastic injection-moulded part.

15. The heat conduction device (14) according to claim 11, wherein the heat conduction element (16) is formed in an S-shape when viewed in a cross-section of the heat conduction element (16).

16. The heat conduction device (14) according to claim 11, wherein the heat conduction device (14) has a plurality of respectively rotatably mounted heat conduction elements (16).

17. The heat conduction device (14) according to claim 16, wherein the plurality of respectively rotatably mounted heat conduction elements (16) are disposed in layers.

18. The heat conduction device (14) according to claim 11, wherein the first spring element (20) is plastic.

19. The heat conduction device (14) according to claim 11, wherein the first spring element (20) is a leaf spring.

20. The heat conduction device (14) according to claim 11, further comprising a second spring element (20) disposed on the heat conduction element (16) and/or the holding device (24).

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0025] FIG. 1 shows a schematic side view of an embodiment of an electrical energy storage having an embodiment of a heat conduction device; and

[0026] FIG. 2 shows a schematic perspective view of an embodiment of the heat conduction device.

DETAILED DESCRIPTION OF THE DRAWINGS

[0027] The same elements, or elements that have the same function, are provided with the same reference numerals in the figures.

[0028] FIG. 1 shows an embodiment of an electric energy storage 10 for an at least partially electric motor vehicle 12 that is depicted purely schematically in a schematic side view. The motor vehicle 12 can in particular be operated completely electrically.

[0029] FIG. 1 further shows a heat conduction device 14 for the electrical energy storage 10. The heat conduction device 14 has at least one heat conduction element 16, here in particular three heat conduction elements 16. The heat conduction element 16 is formed to be in contact with at least one battery cell of the electrical energy storage 10, and to dissipate heat Wy from the battery cell. It can in particular be provided that the electrical energy storage 10 has a plurality of battery cells. The battery cells can be formed as prismatic battery cells, for example. The electrical energy storage 10 can thus be formed as a high-voltage battery.

[0030] The heat conduction device 14 further has at least one spring element 20, here a plurality of spring elements 20. A respective installation direction in the motor vehicle 12 is further shown by the respective axes x, y and z. The z-axis here describes in particular a vertical direction of the vehicle, the y-axis a transverse direction of the vehicle, and the x-axis a longitudinal direction of the vehicle. The electrical energy storage 10 further has a housing wall 22 that is in contact with the at least one heat conduction element 16. The housing wall 22 can in particular be in contact with a cooling device of the electrical energy storage 12 in turn, whereby heat Wy generated by the battery cell can be delivered to the housing wall 22 via the heat conduction element 16, and then to the cooling device in turn. The housing wall 22 is in particular a lower housing wall 22 of the housing.

[0031] It is in particular shown that the heat conduction element 16 is arranged rotatably on a holding device 24 of the heat conduction device 14, and the spring element 20 is arranged on the heat conduction element 16 in such a way that a rotational movement 26 of the heat conduction element 16 is cushioned. The heat conduction element 16 can in particular be rotatably mounted around a point of rotation 28.

[0032] It can in particular be seen that the heat conduction element 16 is formed as an S-shape when viewed in a cross-section of the heat conduction element 16. FIG. 1 further shows that the heat conduction device 14 has a plurality of respectively rotatably mounted heat conduction elements 16.

[0033] It is further shown in FIG. 1 that the spring element 20 is in particular formed as a leaf spring, wherein it is further shown that two spring elements 20 are respectively arranged on the heat conduction element 16.

[0034] FIG. 2 shows a schematic perspective view of a further embodiment of the heat conduction device 14. It is in particular shown here that the plurality of respectively rotatably mounted heat conduction elements 16 is arranged in layers. The heat conduction elements 16 thus in particular overlap at least partially.

[0035] It can in particular be provided that the heat conduction element 20 is formed from aluminum. The holding device 24 can in particular be formed from plastic, the holding device 24 can in particular be a plastic injection-moulded part. The spring element 20 can also in particular be formed from plastic.

[0036] It is thus in particular shown in FIG. 2 that the heat conduction elements 20 are formed as small individual leaves, in particular as thermal transfer elements that serve the heat conduction and can be formed from a heat-conducting material, e.g., aluminum, for example. These heat conduction elements 16 are received in the holding device 24, which simultaneously rotatably mounts these heat conduction elements in a spring-loaded manner, and which can also be formed from plastic, for example.

[0037] Compared with a sheet-metal plate known from the prior art, this has the advantage that the thermal transfer elements can be arranged in layers, and thus the number of the thermal transfer elements selected can be significantly higher. The plastic springs, in other words the spring elements 20, can further be relatively freely arranged in the holding device 24, whereby low spring rates are also possible.

[0038] It is in particular thus enabled that the components of the heat conduction device 14 or the electrical energy storage 10 can be produced in a very cost-effective manner. The heat conduction plates are very easy to mount and dismount in the motor vehicle 12 or in the electrical energy storage 10. A very simple and reversion-friendly battery construction can thus further be provided, whereby the battery construction is cost-effective and has a good recyclability. Construction weight can also be saved, as the heat conduction elements 20 in particular have a lower weight than the heat conduction paste, for example.

[0039] Overall, the figures show a heat conduction plate for usage in HV batteries.

LIST OF REFERENCE CHARACTERS

[0040] 10 electrical energy storage [0041] 12 motor vehicle [0042] 14 heat conduction device [0043] 16 heat conduction element [0044] 20 spring element [0045] 22 housing wall [0046] 24 holding device [0047] 26 rotational movement [0048] 28 point of rotation [0049] x x-axis [0050] y y-axis [0051] z z-axis [0052] Wy heat