# US 2021/0242531 A1 · Vehicle with a High-Voltage Accumulator

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- Number: US 2021/0242531 A1
- Document ID: US20210242531A1
- Status: Published application
- Kind: A1
- Application number: 17/053,964
- Filed: 2019-06-13
- Published: 2021-08-05
- Earliest claimed: 2018-07-09
- Assignees: Bayerische Motoren Werke Aktiengesellschaft
- Applicants: Bayerische Motoren Werke Aktiengesellschaft
- Inventors: Jana BECK; Tobias SCHMIEG
- Web page: https://patentgrep.com/patent/US20210242531A1

## CPC

- H01M 10/4207: {for several batteries or cells simultaneously or sequentially}
- H01M 50/383: Flame arresting or ignition-preventing means
- A62C 2/065: {having as the main closure device materials, whose characteristics undergo an irreversible change under high temperatures, e.g. intumescent}
- A62C 3/07: in vehicles, e.g. in road vehicles
- A62C 3/16: in electrical installations, e.g. cableways
- H01M 10/34: Gastight accumulators
- H01M 50/143: Fireproof; Explosion-proof
- H01M 50/522: Inorganic material
- H01M 50/578: in response to pressure
- H01M 2200/00: Safety devices for primary or secondary batteries
- H01M 2220/20: Batteries in motive systems, e.g. vehicle, ship, plane
- Y02E 60/10: Energy storage using batteries
- H01M: PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- A62C: FIRE-FIGHTING (fire-extinguishing compositions, use of chemical substances in extinguishing fires A62D1/00; spraying, applying liquids or other fluent materials to surfaces in general B05; alarm arrangements G08B, e.g. fire alarms actuated by smoke or gases G08B17/10)
- Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION

## Abstract

A vehicle has a high-voltage accumulator which has a high-voltage accumulator housing. At least one accumulator cell is arranged in the high-voltage accumulator housing and has an emergency degassing opening that is closed in a gas-tight manner in a normal state of the accumulator cell and opens when a specified internal pressure in the interior of the accumulator cell is exceeded so that a hot or burning gas can leak out of the accumulator cell into the high-voltage accumulator housing. Granulate which expands when heated by incident hot or burning gas is provided in sub-regions of the high-voltage accumulator. The sub-regions are arranged in the region of the emergency degassing opening of the at least one accumulator cell.

## Claims

### Claim 1

A vehicle having:
a high-voltage accumulator (1), which comprises a high-voltage accumulator housing,
at least one storage cell (5) arranged in the high-voltage accumulator housing, incorporating an emergency degassing opening (6) which, in a normal state of the storage cell (5), is closed in a gas-tight manner and which, in the event of an overshoot of a predefined internal pressure in the interior of the storage cell (5), opens such that hot or burning gas (7) can escape from the storage cell (5) into the high-voltage accumulator housing,
characterized in that, in subregions of the high-voltage accumulator (1), which are arranged in the region of the emergency degassing opening (6) of the at least one storage cell (5), granulates (9) are provided which, in the event of heat-up associated with the application of hot or burning gas (7) thereto, undergo expansion.

### Claim 2 (depends on 1)

The vehicle according to claim 1, characterized in that the granulates (9) contain a volcanic rock, particularly raw perlite.

### Claim 3 (depends on 1, 2)

The vehicle according to claim 1 or 2, characterized in that water is entrapped in the granulates (9) which, in the event of the heat-up of the granulates (9), vaporizes and expands the granulates (9).

### Claim 4 (depends on 1, 2, 3)

The vehicle according to one of claims 1 to 3, characterized in that the granulates (9) are arranged on an inner side of a wall (2) of the high-voltage accumulator housing.

### Claim 5 (depends on 1, 2, 3, 4)

The vehicle according to one of claims 1 to 4, characterized in that the granulates (9) are arranged on a cell contact-connection system (8) or are integrated in a cell contact-connection system (8), by means of which the poles of a plurality of storage cells (5) are electrically interconnected.