ELECTROLYTE SOLUTION, SECONDARY BATTERY, BATTERY MODULE, BATTERY PACK AND POWERED DEVICE

Abstract

The present application discloses an electrolyte solution, a secondary battery, a battery module, a battery pack and a powered device. The electrolyte solution comprises an organic solvent and an additive, the organic solvent comprises a first organic solvent shown in Formula 1, and the additive comprises a first additive selected from one or more of compounds represented by Formula 2A and Formula 2B. In Formula 1, R 1 and R 2 are each independently one of C1-C3 alkyl and C1-C3 haloalkyl; in Formula 2A, R 21 , R 22 , R 23 , and R 24 are each independently one of single bond and methylene; in Formula 2B, R 31 , R 32 , R 33 , and R 34 are each independently one of a single bond and methylene, and R 4 is one of a single bond, -O-, C1-C3 alkylene, C1-C3 haloalkylene, and C1-C3 oxaalkylene. The secondary battery of the present application has good fast charging performance while ensuring long cycle life and storage life.

Inventors

ZHANG, Limei
CHEN, PEIPEI
LI, Liye

Assignees

Contemporary Amperex Technology (Hong Kong) Limited

Dates

Publication Date: 20260506
Application Date: 20210730