# US 2019/0173068 A1 · Battery module with thermal runaway and gas exhaust management system

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- Number: US 2019/0173068 A1
- Document ID: US20190173068A1
- Status: Published application
- Kind: A1
- Application number: 16/270,790
- Filed: 2019-02-08
- Published: 2019-06-06
- Earliest claimed: 2015-03-06
- Assignees: TTB Holding Company Limited
- Applicants: Ttb Holding Company Limited
- Inventors: Johannes Christian KRUGER
- Web page: https://patentgrep.com/patent/US20190173068A1

## CPC

- H01M 50/317: Re-sealable arrangements
- H01M 10/0525: Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
- H01M 10/52: Removing gases inside the secondary cell, e.g. by absorption (vent plugs or other mechanical arrangements for facilitating escape of gases H01M50/30)
- H01M 10/625: Vehicles
- H01M 10/653: characterised by electrically insulating or thermally conductive materials
- H01M 10/655: Solid structures for heat exchange or heat conduction
- H01M 10/658: by thermal insulation or shielding
- H01M 50/325: comprising deformable valve members, e.g. elastic or flexible valve members
- H01M 50/358: External gas exhaust passages located on the battery cover or case
- H01M 50/367: Internal gas exhaust passages forming part of the battery cover or case; Double cover vent systems
- H01M 50/209: adapted for prismatic or rectangular cells (H01M50/216 takes precedence)
- 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 2200/20: Pressure-sensitive devices
- Y02E 60/10: Energy storage using batteries
- H01M: PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION

## Abstract

Apparatus, methods and systems are provided for thermal runaway and gas exhaust management for high power batteries. A battery module has a plurality of cell-containing carriers stacked on top of one another to form a cell stack having a front end and a rear end. A duct extends through the cell stack between the front end and the rear end for collecting escaped gases from the battery cells. A self-closing one-way pressure relief valve is located in the duct toward the rear end of the cell stack. The pressure relief valve connects to a piping system for carrying the gases to a remote location where the gases can be safely released and dispersed.

## Claims

### Claim 1

A battery module comprising:
a plurality of carriers stacked on top of one another to form a cell stack having a front end and a rear end, each of the carriers containing a battery cell;
a duct extending through the cell stack between the front end and the rear end for collecting escaped gases from the battery cells; and
a pressure relief valve placed in the duct toward the rear end of the cell stack.

### Claim 2 (depends on 2)

The battery module of claim 2 wherein the pressure relief valve connects to a piping system for carrying the gases to a remote location.

### Claim 3 (depends on 1)

The battery module of either one of claim 1 wherein the pressure relief valve is a self-closing, one-way valve.

### Claim 4 (depends on 1)

The battery module of any one of claim 1 wherein the pressure relief valve has an operating pressure of 7 kPa.

### Claim 5 (depends on 1)

The battery module of any one of claim 1 comprising a top plate placed over the cell stack, the top plate having a slot extending between front and rear ends of the cell stack for receiving the duct.

### Claim 6 (depends on 5)

The battery module of claim 5 wherein the top plate is sealed to the cell stack by a gasket.

### Claim 7 (depends on 1)

The battery module of any one of claim 1 wherein each carrier is sealed to an adjacent carrier by way of an inter-carrier gasket.

### Claim 8 (depends on 1)

The battery module of any one of claim 1 wherein the duct is sealed to the cell stack by a duct gasket.

### Claim 9 (depends on 1)

The battery module of any one of claim 1 wherein the battery cell of each carrier comprises a flat battery cell.

### Claim 10 (depends on 9)

The battery module of claim 9 wherein the battery cell of each carrier comprises a lithium-ion pouch cell.

### Claim 11 (depends on 1)

The battery module of any one of claim 1 wherein the cell stack comprises 24 battery cells.

### Claim 12 (depends on 1)

A battery system comprising:
a battery module in accordance with claim 1; and
a gas exhaust piping subsystem connected to the pressure relief valve of the battery module.