Title:
BATTERY DETERIORATION EVALUATION DEVICE, RESISTANCE VALUE CALCULATION DEVICE, BATTERY DETERIORATION EVALUATING METHOD AND PROGRAM
Document Type and Number:
WIPO Patent Application WO/2014/054548
Kind Code:
A1
Abstract:
A battery deterioration evaluation device provided with: a time detecting unit that detects a first time, at which the rate of change of a measured value, namely the current value and/or the voltage value of a secondary battery, reaches or falls below a prescribed rate of change, and a second time, at which the rate of change of the measured value reaches or falls below the prescribed rate of change, and the amount of change to the measured value since the first time reached or surpassed a prescribed amount of change; a resistance value calculating unit that calculates the internal resistance value of the secondary battery on the basis of the current value and the voltage value of the secondary battery at the first time, and the current value and the voltage value of the secondary battery at the second time; and a battery deterioration state evaluation unit that evaluates the deterioration state of the secondary battery on the basis of the internal resistance value of the secondary battery.
Inventors:
OZAKI KAZUKI (JP)
WAKASUGI KAZUYUKI (JP)
MORITA KATSUAKI (JP)
SHIGEMIZU TETSURO (JP)
HASHIMOTO MASAYUKI (JP)
WAKASUGI KAZUYUKI (JP)
MORITA KATSUAKI (JP)
SHIGEMIZU TETSURO (JP)
HASHIMOTO MASAYUKI (JP)
Application Number:
PCT/JP2013/076400
Publication Date:
April 10, 2014
Filing Date:
September 27, 2013
Export Citation:
Assignee:
MITSUBISHI HEAVY IND LTD (JP)
International Classes:
G01R31/36; H01M10/48; H02J7/00
Foreign References:
| JPH10197613A | 1998-07-31 | |||
| JP2010093875A | 2010-04-22 |
Attorney, Agent or Firm:
MORI Ryuichirou et al. (JP)
Woods Ryuichiro (JP)
Woods Ryuichiro (JP)
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