公开(公告)号：US20230340702A1

公开(公告)日：2023-10-26

申请号：US18115357

申请日：2023-02-28

Applicant: NANJING TECH UNIVERSITY

Inventor： ZHIRONG WANG ,  YUXIN ZHOU ,  JUNLING WANG ,  YUHUI XIA ,  HAOZE YANG ,  WENXI WANG ,  PENG DONG ,  FAN YI

IPC: D01F8/16 ,  D01D5/34 ,  D01F8/08 ,  D01D1/02 ,  D01F1/07 ,  D01D7/00 ,  D01D5/00 ,  H01M10/0525 ,  H01M50/383 ,  H01M10/653

CPC classification number: D01F8/16 ,  D01D5/34 ,  D01F8/08 ,  D01D1/02 ,  D01F1/07 ,  D01D7/00 ,  D01D5/0038 ,  H01M10/0525 ,  H01M50/383 ,  H01M10/653 ,  D10B2401/04 ,  D10B2331/10 ,  D10B2321/10 ,  D10B2505/00

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.