# US 12,191,468 B2 · Battery module, and battery pack and power storage device including same

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- Number: US 12,191,468 B2
- Document ID: US12191468B2
- Status: Granted
- Kind: B2
- Application number: 17/620,037
- Filed: 2020-07-02
- Published: 2022-08-18
- Granted: 2025-01-07
- Earliest claimed: 2019-07-03
- Assignees: LG Energy Solution, Ltd.
- Applicants: LG Energy Solution, Ltd.
- Inventors: Hun Cha; Jong-Seung Na; Sang-Jun Park
- Web page: https://patentgrep.com/patent/US12191468B2

## CPC

- H01M 10/6568: characterised by flow circuits, e.g. loops, located externally to the cells or cell casings
- H01M 10/613: Cooling or keeping cold
- H01M 10/653: characterised by electrically insulating or thermally conductive materials
- H01M 10/6555: arranged between the cells
- H01M 10/6567: Liquids
- H01M 10/658: by thermal insulation or shielding
- H01M 50/224: Metals
- H01M 50/273: characterised by the material
- A62C 3/07: in vehicles, e.g. in road vehicles
- A62C 3/16: in electrical installations, e.g. cableways
- 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
- 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 battery module includes a plurality of battery cells assemblies, each having a plurality of battery cells stacked on each other; and at least one cooling unit provided between the plurality of battery cells assemblies and filled with a predetermined coolant therein, the at least one cooling unit having at least one membrane member provided at one end thereof to be opened or closed according to a change of an internal pressure thereof.

## Claims

### Claim 1

A battery module, comprising:
a plurality of battery cells assemblies, each battery cells assembly of the plurality of battery cells assemblies having a plurality of battery cells stacked on each other; and
at least one cooler provided between the plurality of battery cells assemblies and filled with a coolant therein, the at least one cooler having a main case having at least one membrane hole and a cover case having a membrane filter covering the at least one membrane hole to seal the at least one membrane hole to be opened or closed according to a change of an internal pressure of the cooler.

### Claim 2 (depends on 1)

The battery module according to claim 1, wherein the at least one membrane hole is opened to communicate the inside of the at least one cooler with the outside when the internal pressure of the cooler is a predetermined pressure or above.

### Claim 3 (depends on 1)

The battery module according to claim 1, wherein
the main case is filled with the coolant.

### Claim 4 (depends on 3)

The battery module according to claim 3, wherein the membrane filter seals the main case when the internal pressure of the cooler is smaller than a predetermined pressure and communicates the inside of the main case with the outside of the cover case when the internal pressure of the cooler is the predetermined pressure or above.

### Claim 5 (depends on 3)

The battery module according to claim 3, wherein the main case is made of a metal material.

### Claim 6 (depends on 3)

The battery module according to claim 3, wherein the cover case is made of an insulator.

### Claim 7 (depends on 1)

The battery module according to claim 1, wherein the at least one membrane hole is a plurality of membrane holes, and
wherein the plurality of membrane holes are disposed to be spaced apart from each other by a predetermined distance.

### Claim 8 (depends on 1)

A battery pack, comprising:
at least one battery module as defined in claim 1; and
a pack case configured to package the at least one battery module.

### Claim 9 (depends on 8)

An energy storage system, comprising:
at least one battery pack as defined in claim 8.

### Claim 10 (depends on 1)

The battery module according to claim 1, wherein the at least one cooler completely encircles one of the plurality of battery cells assemblies.

### Claim 11 (depends on 1)

The battery module according to claim 1, wherein the at least one cooler is a plurality of coolers, and
wherein each of the plurality of battery cells assemblies is completely encircled by one of the plurality of coolers.