# US 2025/0385341 A1 · Insulation sheet and battery module having the same

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- Number: US 2025/0385341 A1
- Document ID: US20250385341A1
- Status: Published application
- Kind: A1
- Application number: 19/228,150
- Filed: 2025-06-04
- Published: 2025-12-18
- Earliest claimed: 2024-06-13
- Assignees: Samsung SDI Co., Ltd.
- Applicants: Samsung SDI Co., Ltd.
- Inventors: Jae Hyun LEE; Myung Heui WOO; Jung Hyo LEE; Seung Yong YANG; Hye Jin PARK; Ha Na RA; Yun Sung YANG
- Web page: https://patentgrep.com/patent/US20250385341A1

## CPC

- H01M 10/658: by thermal insulation or shielding
- B32B 3/30: characterised by a layer formed with recesses or projections, e.g. {hollows, grooves, protuberances, ribs (apertured layer B32B3/266; layer with cavities or internal voids B32B3/26)}
- H01M 10/647: Prismatic or flat cells, e.g. pouch cells
- H01M 50/209: adapted for prismatic or rectangular cells (H01M50/216 takes precedence)
- H01M 50/211: adapted for pouch cells
- B32B 2250/03: 3 layers
- B32B 2250/40: Symmetrical or sandwich layers, e.g. ABA, ABCBA, ABCCBA
- B32B 2307/304: Insulating
- B32B 2457/10: Batteries
- Y02E 60/10: Energy storage using batteries
- H01M: PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- B32B: LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION

## Abstract

The present disclosure relates to an insulation sheet, and is directed to an insulation sheet improving heat propagation when heat propagation occurs within a battery module. The present disclosure provides an insulating sheet including two first layers, and a second layer located between the two first layers and including an insulation material, wherein at least one surface of the insulation sheet is formed with a bending portion.

## Claims

### Claim 1

An insulation sheet comprising:
two first layers; and
a second layer located between the two first layers and including an insulation material,
wherein at least one surface of the insulation sheet comprises a bending portion.

### Claim 2 (depends on 1)

The insulation sheet of claim 1, wherein the second layer is located in substantially the entire region between the two first layers.

### Claim 3 (depends on 2)

The insulation sheet of claim 2, wherein the bending portion passes through the first layer formed on one surface of the second layer and forms a first groove on one surface of the second layer so that the first groove is exposed to an outside of the insulation sheet.

### Claim 4 (depends on 1)

The insulation sheet of claim 1, wherein the second layer is located in a portion of a region between the two first layers to form a cavity between the two first layers.

### Claim 5 (depends on 4)

The insulation sheet of claim 4, wherein the bending portion passes through the first layer formed on one surface of the second layer so that the cavity is exposed to an outside of the insulation sheet.

### Claim 6 (depends on 4)

The insulation sheet of claim 4, further comprising a filler that substantially fills the cavity.

### Claim 7 (depends on 6)

The insulation sheet of claim 6, wherein the bending portion passes through the first layer formed on one surface of the second layer and forms a second groove on one surface of the filler so that the second groove is exposed to an outside of the insulation sheet.

### Claim 8 (depends on 1)

The insulation sheet of claim 1, wherein the bending portion comprises:
a first bending portion on one surface of the insulation sheet, and
a second bending portion on one surface of the insulation sheet and spaced apart from the first bending portion.

### Claim 9

A battery module comprising:
a plurality of battery cells; and
an insulation sheet surrounding at least a portion of at least one of the plurality of battery cells,
wherein the insulation sheet includes:
two first layers; and
a second layer located between the two first layers and including an insulation material, and
at least one surface of the insulation sheet comprises a bending portion.

### Claim 10 (depends on 9)

The battery module of claim 9, wherein:
at least one of the plurality of battery cells includes a first surface, a second surface adjacent to the first surface, and a corner connecting the first surface to the second surface, and
the insulation sheet has the bending portion provided on the corner to surround the first surface and the second surface.

### Claim 11 (depends on 9)

The battery module of claim 9, wherein the second layer is located in substantially the entire region between the two first layers, and
the bending portion passes through the first layer formed on one surface of the second layer and forms a first groove on one surface of the second layer so that the first groove is exposed to an outside of the insulation sheet.

### Claim 12 (depends on 9)

The battery module of claim 9, wherein the second layer is located in a portion of a region between the two first layers to form a cavity between the two first layers.

### Claim 13 (depends on 12)

The battery module of claim 12, wherein the bending portion passes through the first layer formed on one surface of the second layer so that the cavity is exposed to an outside of the insulation sheet.

### Claim 14 (depends on 12)

The battery module of claim 12, wherein the insulation sheet further comprises a filler that substantially fills the cavity.

### Claim 15 (depends on 14)

The battery module of claim 14, wherein the bending portion passes through the first layer formed on one surface of the second layer, and forms a second groove on one surface of the filler so that the second groove is exposed to an outside of the insulation sheet.