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:
Aug. 27, 2013
Filed:
Feb. 13, 2008
Toshiaki Nakanishi, Toyohashi, JP;
Toshiaki Nakanishi, Toyohashi, JP;
Panasonic EV Energy Co., Ltd., Kosai-shi, JP;
Abstract
Provided is an apparatus for detecting state of charge (SOC) of a battery. A voltage of a battery pack () is detected by voltage sensors (-) to (-). A determining unit () samples currents at times when the battery voltage reaches predetermined threshold voltages (Vth, Vth) respectively, and calculates an open end voltage (Vocv), based on representative values (I, I) of the sampled currents and threshold voltages (Vth, Vth). Furthermore, based on a correspondence relationship between the voltage (Vocv) and the state of charge (SOC) which is determined in advance, the state of charge (SOC) that corresponds to the calculated voltage (Vocv) is calculated.