| 摘要 |
<P>PROBLEM TO BE SOLVED: To easily and accurately detect the characteristics of a secondary battery of a hybrid vehicle. <P>SOLUTION: MG44 is controlled from an MG control processing part 101 of CPU40 by way of a motor controller 74, and by changing the frequency of a state sensing current flowing in the secondary battery 10, the current and voltage of the cell 10 are detected. Based on a plurality of detected results, an impedance is calculated with an impedance calculating part 100. Remaining quantity is calculated with a remaining quantity operator 102, from the obtained impedance and the cell characteristics contained in a memory 80. Furthermore, an integrated current during impedance measurement is added to the remaining quantity, in a remaining quantity variation correction part 104 for correction and weighting factor is determined, based on a standard deviation from the correction value and the remaining quantity, in order to average with a weighting average part 106. Then, by using the remaining quantity calculation, lifetime calculation and lifetime correction calculation are conducted, to average with the weight similarly to the remaining quantity. <P>COPYRIGHT: (C)2006,JPO&NCIPI |
