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:
Mar. 13, 2018
Filed:
Oct. 02, 2013
Toyota Jidosha Kabushiki Kaisha, Toyota-shi, Aichi, JP;
Hisataka Fujimaki, Nisshin, JP;
Hiroshi Kawadu, Toyota, JP;
TOYOTA JIDOSHA KABUSHIKI KAISHA, Toyota-Shi, Aichi, JP;
Abstract
Provided are a secondary battery having a configuration with which localized metal contaminant precipitation at the negative electrode can be reliably inhibited in less time, and a method for producing a secondary battery that allows reliable deactivation of metal contaminant in less time. The battery comprises a positive electrode, a negative electrode, and a separator placed between the two electrodes. The separator has an air resistance Rp≦100 sec in an in-plane direction vertical to its thickness direction and an air resistance Rt>Rp in the thickness direction. The method comprises a minimal charging step where the cell is charged to 0.01% to 0.5% capacity over at least one hour to obtain a state of charge where the positive and negative electrode potentials are at or above the oxidation and reduction potentials of a probable metal contaminant, respectively; and a step of performing initial conditioning charging.