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. 24, 2012
Filed:
Sep. 25, 2008
Keiji Kaita, Nishikamo-gun, JP;
Teruo Ishishita, Nishikamo-gun, JP;
Shinobu Okayama, Nishikamo-gun, JP;
Yuji Nishi, Nagoya, JP;
Daisuke Kuroda, Chiryu, JP;
Keiji Kaita, Nishikamo-gun, JP;
Teruo Ishishita, Nishikamo-gun, JP;
Shinobu Okayama, Nishikamo-gun, JP;
Yuji Nishi, Nagoya, JP;
Daisuke Kuroda, Chiryu, JP;
Toyota Jidosha Kabushiki Kaisha, Toyota, JP;
Denso Corporation, Kariya-Shi, JP;
Abstract
During use of a secondary battery, a concentration change ratio estimating unit estimates a ratio of change in electrolytic solution concentration based on a charging/discharging current. According to the estimated ratio of change, a concentration estimated value calculating unit sequentially calculates an electrolytic solution concentration estimated value during the use of the secondary battery. Based on the estimated electrolytic solution concentration estimated value, a determining unit determines whether or not the electrolytic solution concentration is within a normal range. When the electrolytic solution concentration is outside the normal range, a charging/discharging condition modifying unit modifies a charging/discharging condition of the secondary battery to bring the electrolytic solution concentration back to the normal range, thus avoiding a tendency of overcharge or a tendency of overdischarge.