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. 21, 2018
Filed:
Nov. 01, 2013
Nec Corporation, Tokyo, JP;
Kenji Kobayashi, Tokyo, JP;
NEC Corporation, Tokyo, JP;
Abstract
An object of the present invention is to accurately perform deterioration determination of a lithium ion secondary battery. In order to attain the object, in a deterioration determination method of the present invention, first, measurement processing of charging a deterioration determination target which is a battery cell or a battery module connecting a plurality of battery cells with each other up to a predetermined voltage value, discharging, and measuring a charge voltage value (a charge voltage value after the start of the discharge) within a predetermined period of time from the start of the discharge is repeated a plurality of times. Then, a deterioration state of the deterioration determination target is determined in consideration of a change mode of the charge voltage value after the start of the discharge due to the repetition of the charge and discharge.