JP2007124883A5 - - Google Patents

Claims (10)

A plurality of capacitors connected in series or in parallel or in series and parallel;
A deterioration progress detection means for determining the deterioration progress of the capacitor;
A balanced voltage adjusting means connected before Kiki Yapashita,
The deterioration progress detection means and the balance voltage adjustment means are connected, and comprises a control unit with a built-in microcomputer,
From the mean value of the control unit the deterioration degree of the crisis Yapashita before detected by the deterioration degree detecting means determines variation width of the deterioration degree of the front hear Yapashita is a balanced voltage as decreases respectively,
With a voltage applied across both capacitors connected,
Power storage device across voltage before crisis Yapashita controls the balance voltage adjusting means so that the balanced voltage. Deterioration degree detecting means electric storage device main body of the starting current at the time of charging the key Yapashita when, the voltage, and the internal resistance of the crisis Yapashita before the temperature data obtained based on from the temperature sensor provided in said capacitor near The power storage device according to claim 1, wherein the deterioration progress of the capacitor is obtained from a correlation between the value and the deterioration progress. Deterioration degree detecting means and a constant voltage source connected in parallel to the key Yapashita,
Current detection means connected in series between the capacitor and the constant voltage source;
The switch is connected between the capacitor and the current detection means, and switches to either one of the balance voltage adjustment means or the current detection means,
When detecting the degree of deterioration, the switch determines the leakage current of the capacitor by selecting the current detection means side,
The power storage device according to claim 1 for determining the deterioration degree of the front-handed Yapashita from the correlation of the leakage current and deterioration degree. The power storage device according to claim 1, wherein the control of the balance voltage adjusting means is performed every predetermined period. Provide a temperature controller to keep the temperature of the entire capacitor constant,
The power storage device according to claim 1 for obtaining a balance voltage before crisis Yapashita the temperature before crisis Yapashita while constant. The power storage device according to claim 1, wherein the balance voltage adjusting means and the microcomputer are electrically insulated by providing an electrical indirect connection means in the control unit. The power storage device according to claim 1, wherein the balance voltage adjusting means is a digital potentiometer including a nonvolatile memory whose resistance value can be adjusted by a signal from the control unit. · The Yapashita respectively provided temperature sensors in the vicinity of power storage device according to balance voltage prior handed Yapashita to claim 1, determined by temperature compensation. Balanced voltage adjusting means, a power storage device according to claim 1 for controlling so as the voltage across the key Yapashita does not exceed the specified voltage. The power storage device according to claim 1, wherein when the deterioration progress detection unit detects that all the capacitors are deteriorated, the information is output.