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:
Jul. 01, 2014
Filed:
Mar. 26, 2010
Shabab Amiruddin, Fremont, CA (US);
Subramanian Venkatachalam, Pleasanton, CA (US);
Herman A. Lopez, Sunnyvale, CA (US);
Sujeet Kumar, Newark, CA (US);
Shabab Amiruddin, Fremont, CA (US);
Subramanian Venkatachalam, Pleasanton, CA (US);
Herman A. Lopez, Sunnyvale, CA (US);
Sujeet Kumar, Newark, CA (US);
Envia Systems, Inc., Newark, CA (US);
Abstract
Improved cycling of high voltage lithium ion batteries is accomplished through the use of a formation step that seems to form a more stable structure for subsequent cycling and through the improved management of the charge-discharge cycling. In particular, the formation charge for the battery can be performed at a lower voltage prior to full activation of the battery through a charge to the specified operational voltage of the battery. With respect to management of the charging and discharging of the battery, it has been discovered that for the lithium rich high voltage compositions of interest that a deeper discharge can preserve the cycling capacity at a greater number of cycles. Battery management can be designed to exploit the improved cycling capacity obtained with deeper discharges of the battery.