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:
Jan. 07, 2025
Filed:
Mar. 01, 2024
Contemporary Amperex Technology (Hong Kong) Limited, Hong Kong, CN;
Ting Li, Ningde, CN;
Haizu Jin, Ningde, CN;
Shaojun Niu, Ningde, CN;
Huaichao Tang, Ningde, CN;
Longqing Peng, Ningde, CN;
CONTEMPORARY AMPEREX TECHNOLOGY (HONG KONG) LIMITED, Hong Kong, CN;
Abstract
A protection method for a secondary battery includes evacuating the secondary battery through an injection opening of the secondary battery to within 100 kPa, introducing a first reactant into the secondary battery through the injection opening until a pressure of the secondary battery rises by more than 1 Pa and maintaining the pressure for more than 1 ms, evacuating the secondary battery through the injection opening to within 100 kPa, and introducing a second reactant into the secondary battery through the injection opening until the pressure rises by more than 1 Pa and maintaining the pressure for more than 1 ms, thereby forming a protection layer on an internal surface of the secondary battery.