DETERIORATION DETECTING METHOD FOR ELECTROCHEMICAL ELEMENT, RESIDUAL CAPACITY DETECTING METHOD, AND CHARGER AND DISCHARGE CONTROL DEVICE USING THEM

Japanese Patent JP3669673

B2

PROBLEM TO BE SOLVED: To accurately detect a degree of deterioration and a residual capacity by detecting the electrochemical characteristics of an electrochemical element, and comparing the value obtained with the standard electrochemical characteristics.
SOLUTION: In order to detect deterioration of an electrochemical element 1, a means of detecting electrochemical characteristics 2, a means of memorizing standard electrochemical characteristics 3, a means of comparing the electrochemical characteristics with the standard electrochemical characteristics 4 and a means of judging a degree of deterioration based on the calculated result of the means of comparing 4 are provide. A means of estimating the residual capacity 6 of the deteriorated electrochemical element 1 compensates the capacity of the electrochemical element 1, based on degree of deterioration calculated by the means of judging deterioration 5. In addition, a residual capacity is calculated, based on the integrated value of the output current of the electrochemical element 1 obtained by a signal from the means of detecting 2 and the compensated capacity. Preferably, the capacity of the electrochemical element is estimated, based on a degree of deterioration obtained by a deterioration detecting method for the electrochemical element, and the residual capacity is calculated by the capacity value obtained.

Masaya Uga
Kayama Miho
Kenichi Takeyama

JP17306999A

July 13, 2005

June 18, 1999

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Matsushita Electric Industrial Co., Ltd

H01M10/42; H01M10/44; H01M10/48; H01M10/34; (IPC1-7): H01M10/48; H01M10/44

JP2236473A
JP2000100479A
JP1114717A

Kazuo Ishii

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