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:
Nov. 19, 2019
Filed:
Sep. 25, 2013
Hitachi, Ltd., Tokyo, JP;
Kohei Honkura, Tokyo, JP;
Yutaka Okuyama, Tokyo, JP;
HITACHI, LTD., Tokyo, JP;
Abstract
To accurately determine a deterioration state of a secondary battery with respect to a practical current value. Provided are a state determination device of a secondary battery, a state determination method of a secondary battery, a secondary battery system, and a charge and discharge control apparatus having the state determination device. In the state determination device of the secondary battery having a positive electrode and a negative electrode, a capacity reduction parameter group A is determined based on charge and discharge characteristics per reference quantity of the positive electrode and the negative electrode and a current value A, and a resistance increase parameter group B is determined based on the charge and discharge characteristics per reference quantity of the positive electrode and the negative electrode, the capacity reduction parameter group A, and a current value B which is larger than the current value A.