Energy storage device, motor vehicle, and method for producing an energy storage device

Patent metadata

Field	Value
Publication number	US-2023339364-A1
Application number	US-202318187956-A
Country	US
Kind code	A1
Filing date	Mar 22, 2023
Priority date	Apr 21, 2022
Publication date	Oct 26, 2023
Grant date	—

Abstract

An energy storage device with at least one battery cell and a cooling device for cooling the at least one battery cell. The battery cell has a first side, which is facing a first side of the cooling device, and a releasable degassing opening arranged on the first side, wherein the energy storage device has a thermal interface material, which is arranged between the first side the battery cell and the first side of the cooling device. The energy storage device has at least one degassing channel, into which a gas emerging from the releasable degassing opening can be introduced. A flow path from the releasable degassing opening to the at least one degassing channel is sealed off from an area surrounding the at least one battery cell by a seal, which is provided by the thermal interface material.

First claim

1 . An energy storage device, comprising:
at least one battery cell and a cooling device for cooling the at least one battery cell, the battery cell has a first side facing a first side of the cooling device, and a releasable degassing opening which is arranged on the first side of the battery cell; and the energy storage device has a thermal interface material which is arranged between the first side of the battery cell and the first side of the cooling device, wherein the energy storage device has at least one degassing channel, into which a gas emerging from the releasable degassing opening can be introduced, wherein a flow path from the releasable degassing opening to the at least one degassing channel is sealed off from an area surrounding the at least one battery cell by a seal, which is provided by the thermal interface material.

2 . The energy storage device according to claim 1 , wherein the at least one battery cell is designed as a prismatic battery cell.

3 . The energy storage device according to claim 1 , wherein the at least one battery cell has two cell poles which are arranged on a side different from the first side of the battery cell, in particular wherein one pole each is arranged on a second side and a third side of the battery cell, which are opposite one another with respect to a first direction.

4 . The energy storage device according to claim 1 , wherein the energy storage device has a cell stack with several of the at least one battery cell, wherein the several battery cells are arranged next to one another in a second direction, wherein the releasable degassing openings are arranged in the second direction on an imaginary straight line in a first region of the cell stack, which represents a partial region of a first cell stack side facing the first side of the cooling device and comprising the first sides of the battery cells.

5 . The energy storage device according to claim 4 , wherein the thermal interface material is arranged between the first cell stack side and the first side of the cooling device in such a way that the first region of the cell stack, in which the respective releasable degassing opening s are arranged, is recessed.

6 . The energy storage device according to claim 1 , wherein the thermal interface material is arranged in the form of at least one layer between the first side of the at least one battery cell, in particular the first cell stack side, and the first side of the cooling device, in particular wherein the at least one layer has a layer thickness of at most 2 mm in a third direction.

7 . The energy storage device according to claim 1 , wherein a free region is formed between the first region of the cell stack and the first side of the cooling device, which free region represents a first degassing channel as the at least one degassing channel.

8 . The energy storage device according to claim 1 , wherein the energy storage device has a second degassing channel as the at least one degassing channel on a second side of the cooling device facing away from the battery cell.

9 . A motor vehicle having an energy storage device of claim 1 .

10 . A method for producing at least a part of an energy storage device, comprising the steps:
providing at least one battery cell, which has a first side and a releasable degassing opening arranged on the first side, and a cooling device, which has a first side, for cooling the at least one battery cell, providing a thermal interface material in a viscous state; arranging the at least one battery cell, the thermal interface material, and the cooling device relative to one another in such a way that the first side of the battery cell faces the first side of the cooling device and the thermal interface material is arranged between the first side of the battery cell and the first side of the cooling device, wherein at least one degassing channel is provided such that a gas emerging from the releasable degassing opening can be introduced, wherein a flow path from the releasable degassing opening to the at least one degassing channel is sealed off from an area surrounding the at least one battery cell by a seal, which is provided by the thermal interface material.

11 . The energy storage device according to claim 2 , wherein the at least one battery cell has two cell poles which are arranged on a side different from the first side of the battery cell, in particular wherein one pole each is arranged on a second side and a third side of the battery cell, which are opposite one another with respect to a first direction.

12 . The energy storage device according to claim 2 , wherein the energy storage device has a cell stack with several of the at least one battery cell, wherein the several battery cells are arranged next to one another in a second direction, wherein the releasable degassing openings are arranged in the second direction on an imaginary straight line in a first region of the cell stack, which represents a partial region of a first cell stack side facing the first side of the cooling device and comprising the first sides of the battery cells.

13 . The energy storage device according to claim 3 , wherein the energy storage device has a cell stack with several of the at least one battery cell, wherein the several battery cells are arranged next to one another in a second direction, wherein the releasable degassing openings are arranged in the second direction on an imaginary straight line in a first region of the cell stack, which represents a partial region of a first cell stack side facing the first side of the cooling device and comprising the first sides of the battery cells.

14 . The energy storage device according to claim 2 , wherein the thermal interface material is arranged in the form of at least one layer between the first side of the at least one battery cell, in particular the first cell stack side, and the first side of the cooling device, in particular wherein the at least one layer has a layer thickness of at most 2 mm in a third direction.

15 . The energy storage device according to claim 3 , wherein the thermal interface material is arranged in the form of at least one layer between the first side of the at least one battery cell, in particular the first cell stack side, and the first side of the cooling device, in particular wherein the at least one layer has a layer thickness of at most 2 mm in a third direction.

16 . The energy storage device according to claim 4 , wherein the thermal interface material is arranged in the form of at least one layer between the first side of the at least one battery cell, in particular the first cell stack side, and the first side of the cooling device, in particular wherein the at least one layer has a layer thickness of at most 2 mm in a third direction.

17 . The energy storage device according to claim 5 , wherein the thermal interface material is arranged in the form of at least one layer between the first side of the at least one battery cell, in particular the first cell stack side, and the first side of the cooling device, in particular wherein the at least one layer has a layer thickness of at most 2 mm in a third direction.

18 . The energy storage device according to claim 2 , wherein a free region is formed between the first region of the cell stack and the first side of the cooling device, which free region represents a first degassing channel as the at least one degassing channel.

19 . The energy storage device according to claim 3 , wherein a free region is formed between the fi

Assignees

• Audi Ag

Inventors

• Rieblinger Martin
• Schüssler Martin

Classifications

• B60L58/26 Primary

  by cooling · CPC title

• H01M10/613 Primary

  Cooling or keeping cold · CPC title

• H01M10/625

  Vehicles · CPC title

• H01M10/6557

  arranged between the cells · CPC title

• H01M2220/20

  Batteries in motive systems, e.g. vehicle, ship, plane · CPC title