| 摘要 |
The apparatus for judging deterioration of a battery, of the present invention, comprises: a current detector for detecting output electric current from and regenerative electric current to the battery; a voltage detector for detecting a voltage output from the battery; an integrator for calculating the remaining charge in the battery by integrating the result of detection by the current detector; a threshold voltage calculator for calculating threshold voltage values corresponding to first and second specified values of the remaining charge, based on the electric current value filtered by the filter; a comparator for comparing the threshold voltage value, calculated by the threshold voltage calculator, with the output voltage value from the battery; a corrector for correcting the remaining charge to the first or second specified value when the output voltage value has reached the threshold voltage value; a current integrator for integrating the output current from the battery and the regenerative current after the remaining charge was corrected to the first specified value until the remaining charge is corrected to the second specified value; and a deterioration judgement device for judging the deterioration of the battery when the value obtained from the integration by the current integrator is equal to or below a predetermined deterioration criterion.
|
