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. 09, 1999
Filed:
Jul. 22, 1996
Applicant:
Inventor:
Huanyu Mao, Burnaby, CA;
Assignee:
NEC Moli Energy (Canada) Ltd., Maple Ridge, CA;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01M / ;
U.S. Cl.
CPC ...
429197 ; 429194 ;
Abstract
Non-aqueous rechargeable lithium batteries can be protected against overcharge abuse by incorporating small amounts of suitable aromatic additives into the electrolyte. The additives are electrochemically polymerized at abnormally high voltages, thereby increasing the internal resistance of the battery and thus protecting it. Aromatic additives such as biphenyl, 3-chlorothiophene, and furan are particularly suitable for certain lithium ion batteries. The additives need not and may preferably not polymerize during overtemperature abuse.