| 摘要 |
<p>DC blocking capacitor (11) and resistor (13) are coupled in series with electricity storing section (1) at its both ends, and ON/OFF circuit (17) is coupled in parallel with resistor (13). Peak voltage holding circuit (19) is coupled in parallel with ON/OFF circuit (17), and current sensing section (15) is coupled in series with storing section (1), and an output from current sensing section (15) is supplied to peak current holding circuit (16). In the structure of the storage device discussed above, a flowing direction of an electric current from a positive electrode to a negative electrode of storing section (1) is referred to as a positive direction. ON/OFF circuit (17) is controlled such that circuit (17) is turned on when the current flows in a negative direction, and such that it is turned off when the current flows in the positive direction. An internal resistor of storing section (1) can be found based on a peak voltage resulting from the control and held by circuit (19) and a peak current resulting from the control and held by circuit (16). A degree of degradation of electricity storing section (1) is determined with this internal resistor.</p> |
