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. 29, 2025
Filed:
Jul. 19, 2019
Mitsubishi Electric Corporation, Tokyo, JP;
Takahito Ida, Tokyo, JP;
MITSUBISHI ELECTRIC CORPORATION, Tokyo, JP;
Abstract
Provided is a charging/discharging control device which, for an assembled battery including a plurality of storage batteries connected in series, detects capacity variation among the storage batteries and controls charging/discharging of the assembled battery. The charging/discharging control device includes a charging/discharging controller which calculates an electric-charge-quantity corresponding value which is a value corresponding to an electric charge quantity of the assembled battery, on the basis of a current value of the assembled battery, and calculates, as a voltage second-order derivative value, a value obtained through second-order differentiation of open-circuit voltage of the assembled battery with respect to the electric-charge-quantity corresponding value. When a predetermined charging-stop condition is satisfied, the charging/discharging controller performs control to stop charging, and determines whether or not there is capacity variation among the plurality of storage batteries in the assembled battery, on the basis of the voltage second-order derivative value when the charging-stop condition is satisfied.