Laminate

By using a laminated body structure composed of resin and fibers between the battery cells, the chain explosion problems caused by thermal runaway and fire of lithium-ion batteries are solved, and excellent thermal insulation and flame isolation performance are achieved, ensuring the safety and reliability of the battery.

CN120051372APending Publication Date: 2025-05-27SEKISUI CHEMICAL CO LTD
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Patent Information

Application Number
CN202380075630.2
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Priority Date
2022-12-28
Filing Date
2023-10-12
Publication Date
2025-05-27

AI Technical Summary

Technical Problem

During use, thermal runaway and fire caused by internal short circuits or external shocks, such as batteries, pose a risk of chain explosions, and the prior art is difficult to effectively prevent.

Method used

A laminated body structure is adopted, which includes A and B layers of resin and fibers. A layer has excellent thermal insulation and flame insulation properties, and B layers has good elasticity and thermal conductivity. Through this structure, the transmission of heat and flame can be effectively blocked when components between the cells.

Benefits of technology

Excellent heat insulation and flame isolation performance when components between the battery cells are achieved, effectively preventing chain explosions and ensuring the safety and reliability of the battery.

✦ Generated by Eureka AI based on patent content.

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Abstract

Provided is a laminate which has excellent stretchability, also has excellent heat-shielding performance and flame-shielding performance during combustion, and is capable of preventing chain explosion by blocking the transfer of heat and flame to adjacent battery cells during fire or thermal runaway, in particular, when used as an inter-cell member for a vehicle-mounted battery. The present invention is a laminate provided with: a layer A containing a resin and fibers; and a layer B, the total of the layers A and B being three or more, the laminate being not penetrated by a flame when irradiated with a burner flame for 2 minutes, and being V-0 or more in a UL94 combustion test.
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Claims

1. A laminate comprising: an A layer containing a resin and fibers; and a B layer, wherein the total of the A layer and the B layer is three or more layers, and the laminate is not penetrated by a burner flame when irradiated for 2 minutes and is V-0 or higher in the UL94 combustion test.

2. The laminate according to claim 1, wherein in the compression test, the stress at 20% compression of the B layer is 0.01 MPa or more and 5.00 MPa or less.

3. The laminate according to claim 1 or 2, wherein the thermal conductivity obtained by measuring the B layer according to JIS A1412-2 is 0.1 W / mK or less.

4. The laminate according to any one of claims 1 to 3, wherein the B layer contains at least one selected from resin foams, inorganic foams, and fibers.

5. The laminate according to any one of claims 1 to 4, wherein the resin constituting the A layer is a thermoplastic resin.

6. The laminate according to claim 5, wherein the thermoplastic resin contains at least one selected from chlorinated polyvinyl chloride resins and polyvinyl chloride resins.

7. The laminate according to any one of claims 1 to 6, wherein the A layer further contains an inorganic filler.

8. The laminate according to claim 7, wherein the inorganic filler is aluminum hydroxide.

Citation Information

Patent Citations

  • Battery heat insulation material and battery

    JP2021140968A

  • Composite heat insulation material and method of manufacturing the same

    JP2022059782A

  • Composite insulation and manufacturing method thereof

    JP2022059783A

  • Refractory member

    CN111417674A

  • Laminate and method for using laminate

    WO2022071087A1