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:
Oct. 23, 2001
Filed:
Nov. 09, 2000
Applicant:
Inventor:
Hidenori Yokoyama, Toyota, JP;
Assignee:
Toyota Jidosha Kabushiki Kaisha, Toyota, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01M 1/044 ; H01M 1/046 ;
U.S. Cl.
CPC ...
H01M 1/044 ; H01M 1/046 ;
Abstract
A device for determining a state of charge of a battery with high precision regardless of deterioration of the battery. After fully charging the battery, the device sets the battery to an arbitrary state of charge. The device then detects the charging voltage and the charging current occurring at that time. Based on the detected charging voltage and the detected charging current, the device corrects a pre-stored relationship among the charging voltage, the charging current, and the state of charge. After that, based on the corrected relationship, the device determines a state of charge of the battery.