Degassing device, battery, and motor vehicle

Patent metadata

Field	Value
Publication number	US-2022255184-A1
Application number	US-202217666011-A
Country	US
Kind code	A1
Filing date	Feb 7, 2022
Priority date	Feb 9, 2021
Publication date	Aug 11, 2022
Grant date	—

Abstract

A degassing device for discharging gases from a battery for a motor vehicle, which battery includes at least one first battery cell with an at least releasable first degassing opening. The degassing device has at least one first gas space which can be fluidically coupled to the releasable first degassing opening of the at least one first battery cell, so that gas exiting the degassing opening can be introduced into the at least one first gas space, and has a particle trap device for separating particles from the gas flowing through the particle trap device. The particle trap device is fluidically connected to the at least one first gas space.

First claim

1 . A degassing device for discharging gases from a battery of a motor vehicle, comprising:
at least one first gas space which can be fluidically coupled to a releasable first degassing opening of at least one first battery cell, so that gas exiting the first degassing opening can be introduced into the at least one first gas space, and a particle trap device for separating particles from the gas flowing through the particle trap device, wherein the particle trap device is fluidically connected to the at least one first gas space,
wherein the degassing device provides a first flow path from the at least one first gas space into the particle trap device, the cross-section of which is larger within at least one area of the particle trap device than in the at least one first gas space.

2 . The degassing device according to claim 1 , wherein the at least one first gas space is designed as a first degassing channel, which has a length (L) in a longitudinal direction of extension (x) of the first degassing channel that is greater than a width (B) and a height of the first degassing channel, wherein the first flow path extends along the longitudinal direction of extension (x) of the first degassing channel.

3 . The degassing device according to claim 1 , wherein the particle trap device is designed to cool a gas flow passing through the particle trap device as it passes through.

4 . The degassing device according to claim 1 , wherein the particle trap device has at least one inlet area and one outlet area, wherein the particle trap device is designed in such a way that the first flow path is deflected several times from at least one inlet area to the outlet area.

5 . The degassing device according to claim 1 , wherein the particle trap device has a particle filter arranged in the first flow path, in particular made of steel wool.

6 . The degassing device according to claim 1 , further comprising at least one second degassing channel, spatially separated from the first, which is fluidically coupled to the particle trap device and which can be fluidically coupled to a releasable second degassing opening of at least one second battery cell of the battery, so that the gas exiting the second degassing opening can be introduced into the at least one second degassing channel and guided into the particle trap device along a second flow path.

7 . A battery for a motor vehicle, comprising: a degassing device having at least one first gas space which can be fluidically coupled to a releasable first degassing opening of at least one first battery cell, so that gas exiting the first degassing opening can be introduced into the at least one first gas space, and a particle trap device for separating particles from the gas flowing through the particle trap device, wherein the particle trap device is fluidically connected to the at least one first gas space, wherein the degassing device provides a first flow path from the at least one first gas space into the particle trap device, the cross-section of which is larger within at least one area of the particle trap device than in the at least one first gas space.

8 . The battery according to claim 7 , further comprising a first battery area with at least one first row of cells with several first battery cells arranged next to one another in a first direction (x), which battery cells each have releasable first degassing openings, and a second battery area with at least one second row of cells with several second battery cells arranged next to one another in the first direction, which battery cells each have releasable second degassing openings, wherein the particle trap device is arranged between the first battery area and the second battery area with respect to the first direction (x), wherein the first degassing channel is coupled to the releasable first degassing openings of the first battery cells and extends in the first direction (x) with respect to the particle trap device, and the second degassing channel is coupled to the releasable second degassing openings of the second battery cells and extends opposite the first direction (x) with respect to the particle trap device.

9 . The battery according to claim 8 , further comprising a cooling base on which the at least one first battery cell is arranged, and the degassing device has an exhaust gas channel which is coupled to the outlet opening of the particle trap device, wherein the exhaust gas channel is arranged on a side of the cooling base facing away from the at least one battery cell, in particular wherein the exhaust gas channel is provided by a spatial region between the cooling base and the underbody protection.

10 . A motor vehicle comprising: a battery with a degassing device having at least one first gas space which can be fluidically coupled to a releasable first degassing opening of at least one first battery cell, so that gas exiting the first degassing opening can be introduced into the at least one first gas space, and a particle trap device for separating particles from the gas flowing through the particle trap device, wherein the particle trap device is fluidically connected to the at least one first gas space, wherein the degassing device provides a first flow path from the at least one first gas space into the particle trap device, the cross-section of which is larger within at least one area of the particle trap device than in the at least one first gas space.

11 . The degassing device according to claim 2 , wherein the particle trap device is designed to cool a gas flow passing through the particle trap device as it passes through.

12 . The degassing device according to claim 2 , wherein the particle trap device has at least one inlet area and one outlet area, wherein the particle trap device is designed in such a way that the first flow path is deflected several times from at least one inlet area to the outlet area.

13 . The degassing device according to claim 3 , wherein the particle trap device has at least one inlet area and one outlet area, wherein the particle trap device is designed in such a way that the first flow path is deflected several times from at least one inlet area to the outlet area.

14 . The degassing device according to claim 2 , wherein the particle trap device has a particle filter arranged in the first flow path, in particular made of steel wool.

15 . The degassing device according to claim 3 , wherein the particle trap device has a particle filter arranged in the first flow path, in particular made of steel wool.

16 . The degassing device according to claim 4 , wherein the particle trap device has a particle filter arranged in the first flow path, in particular made of steel wool.

17 . The degassing device according to claim 2 , further comprising at least one second degassing channel, spatially separated from the first, which is fluidically coupled to the particle trap device and which can be fluidically coupled to a releasable second degassing opening of at least one second battery cell of the battery, so that the gas exiting the second degassing opening can be introduced into the at least one second degassing channel and guided into the particle trap device along a second flow path.

18 . The degassing device according to claim 3 , further comprising at least one second degassing channel, spatially separated from the first, which is fluidically coupled to the particle trap device and which can be fluidically coupled to a releasable second degassing opening of at least one second battery cell of the battery, so that the gas exit

Assignees

• Audi Ag

Inventors

• Czech Marvin
• Schüssler Martin
• Wittenschläger Thomas

Classifications

• B01D39/2041

  the material being filamentary or fibrous · CPC title

• H01M50/249

  specially adapted for aircraft or vehicles, e.g. cars or trains (constructional details of batteries specially adapted for electric vehicles B60L50/64) · CPC title

• H01M50/30 Primary

  Arrangements for facilitating escape of gases · CPC title

• H01M10/613

  Cooling or keeping cold · CPC title

• H01M10/6563

  with forced flow, e.g. by blowers · CPC title