Patent · US Active

Electrolytes for lithium ion secondary batteries

US7833661B2 · kind B2 · utility

3Cited by

4References

3Claims

0Family size

Assignee

BYD Company Limited · CN

Inventors

Feng Xiao · Xuchang, CN
Mingxia Wang · Beijing, CN

Key dates

Filing date	Dec 29, 2005
Grant date	Nov 16, 2010
Priority date	—
Expiry date	Aug 4, 2027

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02E60/10
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

The present invention relates to additives for electrolytes of lithium ion secondary batteries that include one or more of the following: 1,3-propane sultone, succinic anhydride; ethenyl sulfonyl benzene, and halobenzene. It can also include biphenyl, cyclohexylbenzene; and vinylene carbonate. The weight of said 1,3-propane sultone is between 0.5 wt. % and 96.4 wt. %, said succinic anhydride is between 0.5 wt. % and 96.4 wt. %; said ethenyl sulfonyl benzene is between 0.5 wt. % and 95.2 wt. %; and said halobenzene is between 0.5 wt. % and 95.2 wt. % of the weight of the additive. Batteries with electrolytes containing said additives have improved over-charge characteristics and low temperature properties, and reduced gas generation during charging and discharging.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.