Electricity: battery or capacitor charging or discharging – One cell or battery charges another – Vehicle battery charging
Reexamination Certificate
2006-04-11
2006-04-11
Tibbits, Pia (Department: 2838)
Electricity: battery or capacitor charging or discharging
One cell or battery charges another
Vehicle battery charging
Reexamination Certificate
active
07026788
ABSTRACT:
The present provides a leakage detection circuit for an electric vehicle, and so on, capable of calculating a leakage resistance. The leakage detection circuit for an electric vehicle detects a current Ig11(t1) that flows in leakage resistances Raand Rbwhen one leakage detection switch SW1is closed at t1and the other leakage detection switch SW2is opened, and detects a current Ig12(t2) when the switch SW1is opened at t2and the switch SW2is closed. In addition, the circuit detects voltages Vl11(t1, t2) and Vl12(t1, t2) of portions where these leakage detection resistances Raare connected. A combined value Rlof the leakage resistances is calculated by a leakage calculator based on the following equation 34Rl=RaVl12(t2)Vg11(t2)-Vg12(t2)-Vl11(t1)Vg11(t1)-Vg12(t1)-(Ra+Rb).Equation34
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Osawa Takeshi
Yano Junya
Sanyo Electric Co,. Ltd.
Tibbits Pia
Wenderoth , Lind & Ponack, L.L.P.
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