Battery with a deactivation device, and motor vehicle

Patent metadata

Field	Value
Publication number	US-11764439-B2
Application number	US-202117796974-A
Country	US
Kind code	B2
Filing date	Mar 8, 2021
Priority date	Apr 7, 2020
Publication date	Sep 19, 2023
Grant date	Sep 19, 2023

Abstract

A battery for a motor vehicle includes at least one cell assembly with a large number of battery cells, wherein the battery cells each have a cell housing with a degassing element for discharging a hot gas produced in the cell housing in the event of a fault, a battery housing with housing walls which enclose a receiving space for receiving the at least one cell assembly, and a deactivation device which is arranged in the receiving space of the battery housing and has at least one sleeve which is filled with a combustion-promoting agent, wherein the sleeve, when it is acted on by the hot gas discharged from at least one battery cell, is configured to release the combustion-promoting agent.

First claim

What is claimed is:

1. A battery for a vehicle, the battery comprising:
at least one cell assembly having a multitude of battery cells, wherein each of the battery cells has a cell housing with a degassing element for discharging any hot gas that forms in an event of a fault in the cell housing,
a battery housing having housing walls that surround an accommodation space for accommodating the at least one cell assembly, and
a deactivating device which is disposed in the accommodation space of the battery housing and comprises at least one shell filled with a combustion promoter,
wherein the shell, upon contact with hot gas discharged by the degassing element of at least one of the battery cells, is configured to release the combustion promoter, and
wherein the combustion promoter is configured to promote controlled burnoff of the hot gas within the accommodation space for deactivation of the hot gas, and hence to prevent ignition of the hot gas outside the accommodation space in an environment of the battery.

2. The battery according to claim 1 , wherein the battery housing has at least one degassing unit disposed in one of the housing walls for discharge of the hot gas deactivated by the burnoff from the accommodation space into the environment of the battery.

3. The battery according to claim 1 , wherein the battery housing is configured to keep the burnoff of the hot gas that has been brought about in a controlled manner within the accommodation space.

4. The battery according to claim 1 , wherein the battery housing is formed from a refractory material.

5. The battery according to claim 1 , wherein the combustion promoter is an oxidizing agent in a form of at least one of a powder or a liquid.

6. The battery according to claim 5 , wherein the oxidizing agent is at least one of a permanganate, sodium percarbonate, hydrogen peroxide, or sodium perborate.

7. The battery according to claim 1 , wherein the shell is a film.

8. The battery according to claim 7 , wherein the film is a polymer film.

9. A vehicle comprising the battery according to claim 1 .

Assignees

• Bayerische Motoren Werke Ag

Inventors

• Asanin Savo
• Baer Amelie
• Varga Aron

Classifications

• H01M50/233 Primary

  characterised by physical properties of casings or racks, e.g. dimensions · CPC title

• H01M50/383 Primary

  Flame arresting or ignition-preventing means · CPC title

• H01M2220/20

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

• H01M50/22

  of the casings or racks · 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