Title:
リチウムイオン二次電池システム、リチウムイオン二次電池の検査方法、リチウムイオン二次電池の制御方法
Document Type and Number:
Japanese Patent JP5568583
Kind Code:
B2
Abstract:
Provided is a secondary battery system adapted to immediately detect that a lithium-ion secondary battery has entered a region in which the battery deteriorates in accordance with the t-law. The lithium-ion secondary battery system includes: a lithium-ion secondary battery; an acoustic emission (AE) sensor that detects an AE signal occurred in the lithium-ion secondary battery; an AE signal detector that detects the AE signal sent from the AE sensor; and a controller to which a signal from the AE signal detector is input. When a count of AE events which occur in a low-voltage region of one charge/discharge cycle of the lithium-ion secondary battery equals or exceeds a threshold value, the controller outputs a signal denoting a start of the deterioration of the lithium-ion secondary battery.
Inventors:
Tsunenori Yamamoto
Application Number:
JP2012051132A
Publication Date:
August 06, 2014
Filing Date:
March 08, 2012
Export Citation:
Assignee:
株式会社日立製作所
International Classes:
H01M10/48; G01R31/36; H01M10/44; H02J7/00
Domestic Patent References:
| JP2006147513A | ||||
| JP2007250545A | ||||
| JP7006795A | ||||
| JP7085892A | ||||
| JP2005291832A | ||||
| JP2010040318A |
Attorney, Agent or Firm:
Manabu Inoue
Yuji Toda
Shigemi Iwasaki
Yuji Toda
Shigemi Iwasaki