# US 2025/0096366 A1 · Battery module

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- Number: US 2025/0096366 A1
- Document ID: US20250096366A1
- Status: Published application
- Kind: A1
- Application number: 18/707,477
- Filed: 2022-10-28
- Published: 2025-03-20
- Earliest claimed: 2021-11-04
- Assignees: LG Energy Solution, Ltd.
- Applicants: LG Energy Solution, Ltd.
- Inventors: Seongyeon WON; Taekyeong LEE; Hyoungsuk LEE
- Web page: https://patentgrep.com/patent/US20250096366A1

## CPC

- H01M 10/658: by thermal insulation or shielding
- H01M 50/211: adapted for pouch cells
- H01M 10/653: characterised by electrically insulating or thermally conductive materials
- H01M 10/6555: arranged between the cells
- H01M 50/204: Racks, modules or packs for multiple batteries or multiple cells
- H01M 50/289: characterised by spacing elements or positioning means within frames, racks or packs (spacing elements inside cells other than separators, membranes or diaphragms H01M50/471)
- H01M 50/293: characterised by the material
- H01M 50/507: comprising an arrangement of two or more busbars within a container structure, e.g. busbar modules
- H01M 50/588: outside the batteries, e.g. incorrect connections of terminals or busbars
- H01M 50/593: Spacers; Insulating plates
- 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

There is disclosed a battery module including a first heat insulator formed in an insulation pad shape and disposed between battery cells; and a second heat insulator disposed between electrode leads and made of a material having a higher coefficient of thermal expansion than that of the first heat insulator, thereby blocking heat and high-temperature particles from moving between the respective battery cells and a bus bar plate and effectively reducing a risk of fires and explosions.

## Claims

### Claim 1

A battery module comprising:
a battery cell layered body formed by layering a first battery cell and a second battery cell that are adjacent to each other;
a plurality of electrode leads electrically connected to the first battery cell and the second battery cell, respectively;
a first heat insulator disposed between the first battery cell and the second battery cell; and
a second heat insulator disposed between the plurality of electrode leads,
wherein the second heat insulator is made of a material having a higher coefficient of thermal expansion than that of the first heat insulator.

### Claim 2 (depends on 1)

The battery module of claim 1, wherein the second heat insulator is made of a thermally expandable material of which a volume increases when a predetermined critical temperature is reached.

### Claim 3 (depends on 2)

The battery module of claim 2, wherein the thermally expandable material comprises an expanding paper.

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

The battery module of claim 1 or 3, wherein the first heat insulator is made of a silicon-based material.

### Claim 5 (depends on 2)

The battery module of claim 2, further comprising:
a bus bar plate configured to electrically connect the plurality of electrode leads with each other,
wherein the second heat insulator is formed in a pad shape with one side fixed to the bus bar plate.

### Claim 6 (depends on 5)

The battery module of claim 5, wherein the second heat insulator is separated from the first heat insulator before the expansion starts.

### Claim 7 (depends on 6)

The battery module of claim 6, wherein other side of the second heat insulator comes into contact with the first heat insulator, when the expansion starts after the predetermined critical temperature is reached.

### Claim 8 (depends on 5, 6, 7)

The battery module of one of claims 5 to 7, wherein the second heat insulator is separated from each of the plurality of electrode leads, before the expansion starts.

### Claim 9 (depends on 8)

The battery module of claim 8, wherein when the expansion starts after the predetermined critical temperature is reached, both lateral surfaces of the second heat insulator come into contact with the plurality of electrode leads, respectively.

### Claim 10 (depends on 6)

The battery module of claim 6, wherein once the expansion of the second heat insulator is completed, a space formed between the plurality of electric leads is closed.