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. 25, 2008
Filed:
Dec. 02, 2002
Yusai Murakami, Hamamatsu, JP;
Yusai Murakami, Hamamatsu, JP;
Panasonic EV Energy Co., Ltd., Shizouka, JP;
Abstract
There is provided a battery pack system with enhanced estimation accuracies of a polarization voltage and a remaining capacity of a secondary battery. A polarization voltage calculation sectioncalculates a polarization voltage Vpol from a filtered variation LPF (ΔQ) of an accumulated capacity with reference to a look-up table (LUT). An electromotive force calculation sectionsubtracts the polarization voltage Vpol from an effective no-load voltage V0to determine a battery electromotive force Veq. A remaining capacity estimation sectionestimates a remaining capacity SOC from the battery electromotive force Veq with reference to a look-up table (LUT)