Title:
リチウムイオン二次電池システム及び析出判定方法
Document Type and Number:
Japanese Patent JP5699970
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a lithium ion secondary battery system in which precipitation of lithium metal on a negative electrode can be determined precisely.SOLUTION: The lithium ion secondary battery system has a lithium ion secondary battery 1 including a positive electrode, a negative electrode, a nonaqueous electrolyte, and a reference electrode, and a control unit 2 for controlling the lithium ion secondary battery. The control unit 2 charges the lithium ion secondary battery with a current value of 10 C or more for a predetermined time, and discharges the lithium ion secondary battery with the same current value as that during charge for a predetermined time after charge. When a first potential difference, i.e., the difference of the negative electrode potential before and after charge is larger than a second potential difference, i.e., the difference of the negative electrode potential after and before discharge, the control unit 2 determines that lithium metal has precipitated on the negative electrode.
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Inventors:
Iwase Kosuke
Application Number:
JP2012060142A
Publication Date:
April 15, 2015
Filing Date:
March 16, 2012
Export Citation:
Assignee:
TOYOTA JIDOSHA KABUSHIKI KAISHA
International Classes:
H01M10/48; H01M10/0566; H01M10/058; H01M10/42; H01M10/44
Domestic Patent References:
| JP2011171213A | ||||
| JP2010218900A | ||||
| JP2003243048A | ||||
| JP2001015177A | ||||
| JP2009244088A |
Attorney, Agent or Firm:
Ken Ieiri