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:
Dec. 02, 2014
Filed:
Sep. 14, 2012
Etsuzo Sato, Tokyo, JP;
Noriyasu Iwane, Tokyo, JP;
Etsuzo Sato, Tokyo, JP;
Noriyasu Iwane, Tokyo, JP;
Furukawa Electric Co., Ltd., Tokyo, JP;
Furukawa Automotive Systems Inc., Inukami-gun, JP;
Abstract
There is provided a state-of-charge estimation method, a state-of-charge estimation device, and a secondary-battery power system that may quickly and stably determine the convergence value of an adjustment parameter of a voltage characteristic formula that may approximate change over time of an open-circuit voltage of a secondary battery with high precision by appropriately setting the initial value of the adjustment parameter. At step S, a selected voltage measurement values V, VMbi ((i=1 to (n−1)), and VMare used to calculate an initial value A(i=1 to n) of an adjustment parameter A(i=1 to n). In addition, at step S, an integer string bi (i=1 to (n−1)) and a real number C are used to calculate an initial value B(i=1 to n) of an adjustment parameter B(i=1 to n).