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. 07, 2020
Filed:
Dec. 14, 2016
Rohm Co., Ltd., Ukyo-Ku, Kyoto, JP;
Takahiro Shimizu, Kyoto, JP;
ROHM CO., LTD., Kyoto, JP;
Abstract
The present invention improves the detection accuracy of the state of charge of a battery. A coulomb count value CC is generated by integrating a charge/discharge current Iof a battery (S). An SOC value SOCis calculated (S). Based on an SOC-OCV characteristic predetermined for the battery, an OCV value OCVcorresponding to the value SOCis generated (S). A voltage Vof the battery is detected (S). A voltage drop Vbetween OCVand a detected value Vof the voltage Vis generated (S). A value OCVgreater than the minimum operating voltage of the system by ΔV, which corresponds to the voltage drop V, is generated (S). Based on the SOC-OCV characteristic, an SOC value SOCcorresponding to OCVis generated (S). Based on the value SOC, at least one of the values SOC, CC, CC, and SOC-OCV characteristics is corrected.