# US 2022/0285784 A1 · Battery arrangement, motor vehicle, and method for discharging gases from a battery

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- Number: US 2022/0285784 A1
- Document ID: US20220285784A1
- Status: Published application
- Kind: A1
- Application number: 17/679,333
- Filed: 2022-02-24
- Published: 2022-09-08
- Earliest claimed: 2021-03-02
- Assignees: Audi AG
- Applicants: Audi AG
- Inventors: Carsten LORENZ; Thomas MILDE; Martin SCHUESSLER; Thomas WITTENSCHLAEGER
- Web page: https://patentgrep.com/patent/US20220285784A1

## CPC

- H01M 50/3425: {in the form of rupturable membranes or weakened parts, e.g. pierced with the aid of a sharp member}
- B60K 1/04: of the electric storage means for propulsion
- B60K 13/04: concerning exhaust
- H01M 10/613: Cooling or keeping cold
- H01M 10/625: Vehicles
- H01M 10/6556: Solid parts with flow channel passages or pipes for heat exchange (closed pipes H01M10/6552)
- H01M 50/249: specially adapted for aircraft or vehicles, e.g. cars or trains (constructional details of batteries specially adapted for electric vehicles B60L50/64)
- H01M 50/358: External gas exhaust passages located on the battery cover or case
- B60K 2001/0438: {Arrangement under the floor}
- 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
- B60K: ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION

## Abstract

A battery arrangement for a motor vehicle, which has a battery having at least one battery cell which has at least one releasable degassing opening, and a degassing device which is fluidically coupled to the degassing opening of the at least one battery cell and is designed to lead gases escaping from the at least one releasable degassing opening of the battery cell and entering the degassing device out of the battery. The degassing device has at least one exhaust gas duct arranged outside the battery, which is fluidically coupled to the battery and which is designed in such a way that a gas flowing into the exhaust gas duct via the coupling point can be conducted to an outlet opening of the exhaust gas duct.

## Claims

### Claim 1

A battery arrangement for a motor vehicle, comprising: a battery having at least one battery cell which has at least one releasable degassing opening, and a degassing device which is fluidically coupled to the degassing opening of the at least one battery cell and is designed, in the case that gas escapes from the at least one releasable degassing opening of the battery cell and enters the degassing device, to lead the gas out of the battery, wherein the degassing device has at least one exhaust gas duct arranged outside the battery, which is fluidically coupled to the battery via a coupling point of the battery arrangement and which is designed in such a way that a gas flowing into the exhaust gas duct via the coupling point can be conducted to an outlet opening of the exhaust gas duct, which, when the battery arrangement is arranged on the motor vehicle as intended, opens into a motor vehicle region which is at least different from a region of an underbody of the motor vehicle which is arranged directly below the battery.

### Claim 2

A motor vehicle having a battery arrangement, the battery arrangement comprising: a battery having at least one battery cell which has at least one releasable degassing opening, and a degassing device which is fluidically coupled to the degassing opening of the at least one battery cell and is designed, in the case that gas escapes from the at least one releasable degassing opening of the battery cell and enters the degassing device, to lead the gas out of the battery, wherein the degassing device has at least one exhaust gas duct arranged outside the battery, which is fluidically coupled to the battery via a coupling point of the battery arrangement and which is designed in such a way that a gas flowing into the exhaust gas duct via the coupling point can be conducted to an outlet opening of the exhaust gas duct, which, when the battery arrangement is arranged on the motor vehicle as intended, opens into a motor vehicle region which is at least different from a region of an underbody of the motor vehicle which is arranged directly below the battery.

### Claim 3 (depends on 2)

The motor vehicle as claimed in claim 2, wherein the outlet opening is arranged in a rear region of the motor vehicle.

### Claim 4 (depends on 2)

The motor vehicle as claimed in claim 2, wherein the outlet opening is arranged in a front region of the motor vehicle and/or in a roof region of the motor vehicle.

### Claim 5 (depends on 2)

The motor vehicle as claimed in claim 2, wherein the motor vehicle has a body having a support structure, which has a support structure component designed as a hollow profile, wherein at least part of the exhaust gas duct is provided by at least one part of the support structure component.

### Claim 6 (depends on 5)

The motor vehicle as claimed in claim 5, wherein a particle trap for separating particles from the gas flowing through the part of the support structure component is arranged in an interior space of at least one part of the support structure component.

### Claim 7 (depends on 2)

The motor vehicle as claimed in claim 2, wherein the support structure component represents a tubular structure of an axle support and/or rear axle subframe of the body and/or a side member and/or side sill.

### Claim 8 (depends on 2)

The motor vehicle as claimed in claim 2, wherein at least part of the exhaust gas duct is provided by at least part of an underbody cladding of the motor vehicle and/or tension struts and/or metal sheets in the region of an underbody of the motor vehicle.

### Claim 9 (depends on 2)

The motor vehicle as claimed in claim 2, wherein the exhaust gas duct has a first section, the interior of which is arranged through a space between a cooling base of the battery for cooling the at least one battery cell and an underride guard of the motor vehicle, wherein the underride protection is arranged below the cooling base in relation to a motor vehicle vertical direction and the cooling base is arranged below the at least one battery cell.

### Claim 10

A method for discharging a gas escaping from at least one battery cell of a battery of a motor vehicle by a degassing device which is fluidically coupled to at least one releasable degassing opening of the battery cell, wherein if gas escapes from the at least one releasable degassing opening of the battery cell, the gas at least partially enters the degassing device and is guided out of the battery by means of the degassing device, wherein the degassing device has at least one exhaust gas duct arranged outside the battery, which is fluidically coupled to the battery via a coupling point of the battery and which conducts the gas flowing into the exhaust gas duct via the coupling point to an outlet opening of the exhaust gas duct, which opens into a motor vehicle region which is at least different from a region of an underbody of the motor vehicle which is arranged directly below the battery.

### Claim 11 (depends on 3)

The motor vehicle as claimed in claim 3, wherein the outlet opening is arranged in a front region of the motor vehicle and/or in a roof region of the motor vehicle.

### Claim 12 (depends on 3)

The motor vehicle as claimed in claim 3, wherein the motor vehicle has a body having a support structure, which has a support structure component designed as a hollow profile, wherein at least part of the exhaust gas duct is provided by at least one part of the support structure component.

### Claim 13 (depends on 4)

The motor vehicle as claimed in claim 4, wherein the motor vehicle has a body having a support structure, which has a support structure component designed as a hollow profile, wherein at least part of the exhaust gas duct is provided by at least one part of the support structure component.

### Claim 14 (depends on 3)

The motor vehicle as claimed in claim 3, wherein the support structure component represents a tubular structure of an axle support and/or rear axle subframe of the body and/or a side member and/or side sill.

### Claim 15 (depends on 4)

The motor vehicle as claimed in claim 4, wherein the support structure component represents a tubular structure of an axle support and/or rear axle subframe of the body and/or a side member and/or side sill.

### Claim 16 (depends on 5)

The motor vehicle as claimed in claim 5, wherein the support structure component represents a tubular structure of an axle support and/or rear axle subframe of the body and/or a side member and/or side sill.

### Claim 17 (depends on 6)

The motor vehicle as claimed in claim 6, wherein the support structure component represents a tubular structure of an axle support and/or rear axle subframe of the body and/or a side member and/or side sill.

### Claim 18 (depends on 3)

The motor vehicle as claimed in claim 3, wherein at least part of the exhaust gas duct is provided by at least part of an underbody cladding of the motor vehicle and/or tension struts and/or metal sheets in the region of an underbody of the motor vehicle.

### Claim 19 (depends on 4)

The motor vehicle as claimed in claim 4, wherein at least part of the exhaust gas duct is provided by at least part of an underbody cladding of the motor vehicle and/or tension struts and/or metal sheets in the region of an underbody of the motor vehicle.

### Claim 20 (depends on 5)

The motor vehicle as claimed in claim 5, wherein at least part of the exhaust gas duct is provided by at least part of an underbody cladding of the motor vehicle and/or tension struts and/or metal sheets in the region of an underbody of the motor vehicle.