| 摘要 |
PROBLEM TO BE SOLVED: To provide a method of calculating the remaining capacity rate of a battery capable of detecting the remaining capacity or the remaining capacity rate with a high precision, and to provide a battery pack. SOLUTION: At the beginning of discharge, the remaining capacity rate by an integration method is used, then gradually transferred to the remaining capacity rate by a voltage method, at the vicinity of the end of discharge the remaining capacity is detected by the voltage method and at the end of the discharge the detection method is completely replaced by the voltage method. At the switching between the voltage method and integration method (current integration or voltage integration), the remaining capacity rate is calculated by the weighted addition of the remaining capacity rate by voltage method and the remaining capacity rate by integration method using a parameter of reliability of voltage method provided previously. COPYRIGHT: (C)2006,JPO&NCIPI
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