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. 07, 2017
Filed:
Apr. 28, 2009
Takeshi Abe, Okazaki, JP;
Akira Tsujiko, Miyoshi, JP;
Tomitaro Hara, Okazaki, JP;
Keiko Wasada, Toyota, JP;
Sachie Yuasa, Okazaki, JP;
Takeshi Abe, Okazaki, JP;
Akira Tsujiko, Miyoshi, JP;
Tomitaro Hara, Okazaki, JP;
Keiko Wasada, Toyota, JP;
Sachie Yuasa, Okazaki, JP;
Toyota Jidosha Kabushiki Kaisha, Toyota-shi, Aichi, JP;
Abstract
An object is to provide a method of charging and maintaining a lithium ion secondary battery which method is capable of preventing a decrease in the capacity of the battery. Another object is to provide a battery system capable of preventing a decrease in battery capacity, and a vehicle and a battery-mounted device which have such a battery system mounted therein. A method of charging and maintaining lithium ion secondary batteriesusing positive active material particlesmade from a two-phase coexistence type positive active material PM in a positive electrode plateincludes an overcharge step Sfor charging the lithium ion secondary batteries to bring their SOC (State of Charge) SC into an overcharge SOC not higher than 100% but higher than a target SOC, a return discharge step Sfor discharging, after the overcharge step, the lithium ion secondary batteries to make their SOC equal to the target SOC, and a maintaining step S