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:
Nov. 12, 2013
Filed:
Jan. 12, 2010
Yoshinori Aoshima, Hitachinaka, JP;
Masahiro Ueda, Hitachinaka, JP;
Youhei Kawahara, Hitachi, JP;
Kouji Higashimoto, Hitachinaka, JP;
Yoshinori Aoshima, Hitachinaka, JP;
Masahiro Ueda, Hitachinaka, JP;
Youhei Kawahara, Hitachi, JP;
Kouji Higashimoto, Hitachinaka, JP;
Hitachi Vehicle Energy, Ltd., Hitachinaka-shi, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A plurality of resistance value tables of a battery group with respect to temperature and SOC of the assembled battery, which are measured in advance when currents of different change patterns flow in the assembled battery, are stored. A resistance value for the assembled battery is calculated, based upon its voltage and current. From among the plurality of resistance value tables, a resistance value table is selected so that it corresponds to the change pattern of the current flowing in the assembled battery when the voltage and the current of the assembled battery were measured, and a resistance value is searched for from that resistance value table corresponding to the temperature and the SOC of the assembled battery. Then the calculated resistance value and the one from the table are compared to determine the life of the assembled battery.