| 摘要 |
PROBLEM TO BE SOLVED: To provide a full charge capacity estimation system capable of precisely calculating the estimation value of full charge capacity even during the generation of an offset in the measurement value of a current sensor, while considering that in the integration value of the charge discharge currents errors are integrated, the full charge current cannot be calculated when the measurement value of the current sensor is offset in the constitution estimating the full charge current from the rate of charge current and the integration value of the charge and discharge current. SOLUTION: The full charge capacity estimation device is constituted that the full charged capacity Q<SB>max</SB>is calculated from the ratio of the measured current I to the differential value of the estimated charge current without using the integration value of charge and discharge current. This system is so constituted that it is capable of estimating full charge capacity without using the integration value of charge current and discharge current as used in conventional ones, the error doesn't be accumulated even during the measurement value of the current sensor is offset. Consequently, the estimated value of the full charge capacity is effective in correct calculation and improved estimated precision. COPYRIGHT: (C)2007,JPO&INPIT
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