| 摘要 |
<P>PROBLEM TO BE SOLVED: To simply determine the performance of a secondary battery in an arbitrary state of temperature, such as a low temperature. <P>SOLUTION: This apparatus 100 for measuring battery performance includes a temperature measuring part 6 which measures the temperature T1 of the secondary battery, an impedance measuring part 4 which measures an AC resistance value of the secondary battery and a DC resistance value in a first pulse period thereof at the temperature T1, and an estimating part 7 which makes a simple resistance Re1 of the second battery at the temperature T1 be the AC resistance value, while making a reaction resistance Rc1 be a value obtained by subtracting the AC resistance value from the DC resistance value in the first pulse period, and estimates at least the internal resistance of the secondary battery by using the temperature T1, the simple resistance Re1 and the reaction resistance Rc1. <P>COPYRIGHT: (C)2011,JPO&INPIT |
