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. 17, 2015
Filed:
May. 22, 2013
Nissan Motor Co., Ltd., Yokohama-shi, Kanagawa, JP;
Wataru Ogihara, Zushi, JP;
Hideaki Tanaka, Yokohama, JP;
Nissan Motor Co., Ltd., Yokohama, JP;
Abstract
A method for controlling charging of a secondary cell including a positive electrode containing a positive-electrode active substance having that increases resistance in accordance with an increase in the SOC, a negative electrode; and a non-aqueous electrolyte includes performing constant-current charging at a set current value to a prescribed upper-limit voltage, performing constant-voltage charging at the upper-limit voltage after the upper-limit voltage Vhas been reached, and terminating charging of the secondary cell when the charging current in the constant-voltage charging has decreased to a cutoff current value, the cutoff current value being set to a current value that complies with the relationships in formulas (I) and (II):Cutoff current value A≧set current value A×X  (I)X=(cell resistance Rof secondary cell in target SOC [Ω]×set current value A[A])/upper-limit voltage V[V].  (II)