| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a battery state measurement apparatus capable of predicting in advance a stable open circuit voltage without waiting for stabilisation of the open circuit voltage. <P>SOLUTION: The battery state measurement apparatus comprises: a voltage detection unit 10 for detecting a transient open circuit voltage V<SB POS="POST">C</SB>of a secondary battery 201 at a point of time elapsed for a certain period X1 after the stopping of charging/discharging the secondary battery 201; a state quantity detection unit (a temperature detection unit 20, a charge rate calculation unit 41 and a deterioration rate calculation unit 42) for detecting a certain state quantity S (a charge rate, a deterioration rate and temperature) of the secondary battery 201 before the point of time elapsed for the certain period X1; a prediction unit (a voltage difference calculation unit 43 and a voltage calculation unit 44) for predicting a stable open circuit voltage V<SB POS="POST">S</SB>corresponding to the transient open circuit voltage V<SB POS="POST">C</SB>detected by the voltage detection unit 10 and the state quantity S detected by the state quantity detection unit, on the basis of the relation between the transient open circuit voltage V<SB POS="POST">C</SB>, the certain state quantity S and the stable open circuit voltage V<SB POS="POST">S</SB>of the secondary battery after the point of time elapsed for the certain period X1. <P>COPYRIGHT: (C)2013,JPO&INPIT |
