| 摘要 |
PROBLEM TO BE SOLVED: To shorten the time required for specifying the voltage holding ratio of an electric double layer capacitor.SOLUTION: A voltage holding ratio specification device of an electric double layer capacitor includes a charging section 2 performing constant-voltage charging for an inspection object capacitor 11 charged to a rated voltage with a rated voltage, a current detector 3 for detecting a charging current Ich flowing through the capacitor 11 in a constant-voltage charged state with the rated voltage, and outputting while converting into a voltage signal Vi, and a processing section 5 executing the specification processing for acquiring the features of a transient current waveform in a transient period T1 of the charging current Ich, which makes a transition to a steady period where the current value becomes substantially constant, after passing the transient period where the current value decreases gradually in the constant-voltage charged state, based on the voltage signal Vi, and specifying the voltage holding ratio of the capacitor 11 based on the features thus acquired.SELECTED DRAWING: Figure 1 |
