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:
Aug. 10, 2021
Filed:
Feb. 07, 2019
Hitachi Construction Machinery Co., Ltd., Tokyo, JP;
Hitachi Construction Machinery Co., Ltd., Tokyo, JP;
Abstract
A storage battery () is configured of a plurality of cells (A) to (N) series-connected to each other. A battery controller () receives power supplied from a lead battery (). The battery controller () executes balancing control that reduces variation in cell voltages (VcA) to (VcN) of the plurality of cells (A) to (N). The battery controller () executes the balancing control in a time range during which a voltage of the lead battery () becomes equal to or more than a predetermined given voltage value (V) and a charging rate of the storage battery () becomes equal to or more than a predetermined given charging rate value (SOC) after a key switch () is switched from an on state to an off state.