Phase change flame retardant fiber material and preparation method for thermal management of lithium-ion battery in enclosed space

Patent metadata

Field	Value
Publication number	US-12522953-B2
Application number	US-202318115357-A
Country	US
Kind code	B2
Filing date	Feb 28, 2023
Priority date	Apr 21, 2022
Publication date	Jan 13, 2026
Grant date	Jan 13, 2026

Abstract

The present disclosure discloses a phase-change flame-retardant fiber material for thermal management of a lithium ion battery in a closed space and a preparation method. The phase-change flame-retardant fiber material is prepared in a coaxial electrostatic spinning manner and includes a composite phase-change fiber material PASA-TPU at a core part and a flame-retardant fiber material TB-PAN wrapping a surface of the core part. The composite phase-change fiber material is well wrapped with the flame-retardant fiber material, and the lithium ion battery wrapping the whole phase-change flame-retardant fiber material in the closed space is subjected to charge-discharge cycle; the result shows that the surface temperature of the battery can be effectively reduced by about 20° C. by the material, and the material can effectively play a role in multiple cycle processes; the whole material has an excellent and stable heat absorption effect, and has no leakage and collapse; and the phase-change flame-retardant fiber material only has thermal shrinkage and blackening phenomena and is not combusted after being ignited by open fire for over 20 s. Therefore, the phase-change flame-retardant fiber material of the present disclosure has a relatively good flame-retardant effect compared with other phase-change materials.

First claim

The invention claimed is:

1 . A phase-change flame-retardant fiber material for thermal management of a lithium ion battery in a closed space, prepared in a coaxial electrostatic spinning manner, comprising a composite phase-change fiber material PASA-TPU at a core part and a flame-retardant fiber material TB-PAN wrapping a surface of the core part;
the composite phase-change fiber material PASA-TPU comprises the following components: palmitic acid powder, stearic acid powder and thermoplastic polyurethane elastomer rubber particles; and a mass ratio of the palmitic acid powder to the stearic acid powder to the thermoplastic polyurethane elastomer rubber particles is 3:2:1; the flame-retardant fiber material TB-PAN comprises the following components: polyacrylonitrile, boron nitride and triphenyl phosphate based on a mass ratio of 2:2:3.

Assignees

• Nanjing University Of Technology

Inventors

• Wang Zhirong
• Zhou Yuxin
• Wang Junling
• Xia Yuhui
• Yang Haoze
• Wang Wenxi
• Dong Peng
• Yi Fan

Classifications

• H01M10/0525

  Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries · CPC title

• D10B2505/00

  Industrial · CPC title

• D10B2401/04

  Heat-responsive characteristics · CPC title

• D10B2331/10

  polyurethanes · CPC title

• D10B2321/10

  polymers of unsaturated nitriles, e.g. polyacrylonitrile, polyvinylidene cyanide · CPC title