The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 24, 2026
Filed:
Aug. 12, 2025
Contemporary Amperex Technology Co., Limited, Ningde, CN;
Feng Liu, Ningde, CN;
Yulei Fan, Ningde, CN;
Wenhao Guan, Ningde, CN;
Wei Zhong, Ningde, CN;
Xiaoming Ge, Ningde, CN;
Chuying Ouyang, Ningde, CN;
CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED, Ningde, CN;
Abstract
A separator, a battery cell, a battery, and an electric device are described. The separator comprises a porous base material and a ferroelectric coating located on at least one surface of the porous base material. The ferroelectric coating comprises a ferroelectric material. The ferroelectric material comprises an inorganic ferroelectric and a ferroelectric polymer. The ferroelectric polymer comprises polyvinylidene fluoride and a copolymer thereof, the ferroelectric polymer comprises β-phase polyvinylidene fluoride, and the content of the β-phase polyvinylidene fluoride in the ferroelectric polymer is greater than or equal to 60%. The separator can slow the continuous growth of dendrites in a direction perpendicular to an electrode sheet, reduce internal short circuits of the battery and improve the reliability of the battery, and can further improve the coulombic efficiency and rate performance of the battery.