US 12,316,093 B2
Power supply system having a circuit for detecting a ground fault
Robert Grooms, Farmington Hills, MI (US); and Vibhor Singh, Farmington Hills, MI (US)
Assigned to Sumitomo Wiring Systems, Ltd., Yokkaichi (JP)
Filed by Sumitomo Wiring Systems, Ltd., Yokkaichi (JP)
Filed on Mar. 30, 2023, as Appl. No. 18/193,246.
Prior Publication US 2024/0333278 A1, Oct. 3, 2024
Int. Cl. H02H 3/16 (2006.01); H02J 9/06 (2006.01); B60R 16/033 (2006.01); H03K 17/082 (2006.01)
CPC H02H 3/16 (2013.01) [H02J 9/061 (2013.01); B60R 16/033 (2013.01); H03K 17/0822 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A control circuit for a power supply system, the power supply system including a first battery and a second battery and a first switch having a first source, a first drain and a first gate and a second switch having a second source, a second drain and a second gate configured to turn on and off power supply from the first battery and the second battery respectively, the control circuit comprising:
a third switch having a third source, a third drain and a third gate, wherein the third drain is connected to the first gate and the second gate of the first switch and the second switch and the third source is connected to the first source and the second source of the first switch and the second switch, and wherein the third gate is connected to a ground, wherein in the event of a short caused by a disconnection to ground, a voltage at the third gate and third source of the third switch is the same, turning on the third switch and shorting the first gate, first source, the second gate and the second source of the first switch and the second switch so as to turn off the first switch and the second switch.