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. 20, 2020
Filed:
Feb. 01, 2017
Vehicle Energy Japan Inc., Hitachinaka-shi, Ibaraki-ken, JP;
Masahiro Yonemoto, Tokyo, JP;
Kei Sakabe, Tokyo, JP;
Ryohhei Nakao, Hitachinaka, JP;
Keiichiro Ohkawa, Hitachinaka, JP;
Daiki Komatsu, Tokyo, JP;
Vehicle Energy Japan Inc., Hitachinaka-shi, JP;
Abstract
The state of internal resistance is appropriately expressed for a battery being energized. A battery management system includes a battery information acquisition section, a voltage calculation section, a current fluctuation amount calculation sectionand a resistance correction amount calculation section. The battery information acquisition section acquires a voltage value V of a storage battery being energized. The voltage calculation section acquires a predicted battery voltage value Vof the storage battery being energized by a method different from that of the battery information acquisition section. The current fluctuation amount calculation section calculates a current fluctuation amount dI/dt of the storage battery per unit time. Based on the comparison result of the voltage value V and the predicted battery voltage value Vand the current fluctuation amount dI/dt, the resistance correction amount calculation section corrects an equivalent circuit model expressing the internal state of the storage battery including a DC resistance component Rand a polarization resistance component R.