Patent ID: 11965938
Assignee: SANYO ELECTRIC CO., LTD.
Field: nan (nan)
Classification: CPC nan | IPC B  G

Claim 6:
7. A leakage detection device comprising:
in a state of being insulated from a ground, a coupling capacitor including a first end connected to a current path of a power storage unit connected to a load;
a voltage output unit configured to generate a periodic voltage that periodically changes to apply the periodic voltage to a second end of the coupling capacitor via an impedance element;
a voltage measurement unit configured to measure a voltage at a node between the coupling capacitor and the impedance element; and
a leakage determination unit configured to determine whether or not a leakage has occurred between a current path of the power storage unit and the ground based on a peak-to-peak value between an upper peak value and a lower peak value of a voltage waveform of the voltage measured by the voltage measurement unit,
wherein the leakage determination unit estimates at least one of a virtual upper peak value and a virtual lower peak value at a time to calculate the peak-to-peak value, and calculates the peak-to-peak value between the virtual upper peak value or the upper peak value at the time to calculate the peak-to-peak value, and the virtual lower peak value or the lower peak value to calculate the peak-to-peak value.