US 12,272,942 B2
Power supply system
Tetsuo Morita, Kariya (JP)
Assigned to DENSO CORPORATION, Kariya (JP)
Filed by DENSO CORPORATION, Kariya (JP)
Filed on Apr. 6, 2023, as Appl. No. 18/131,501.
Application 18/131,501 is a continuation of application No. PCT/JP2021/037131, filed on Oct. 7, 2021.
Claims priority of application No. 2020-180039 (JP), filed on Oct. 27, 2020.
Prior Publication US 2023/0283066 A1, Sep. 7, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. H02H 7/00 (2006.01); B60R 16/023 (2006.01); H02H 7/20 (2006.01)
CPC H02H 7/20 (2013.01) [B60R 16/0232 (2013.01); B60R 16/0238 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A power supply system comprising:
a first system which serves to deliver electrical power from a first power supply to an electrical load through a first power feeding path;
a second system which serves to deliver electrical power from a second power supply to the electrical load through a second power feeding path;
a system-to-system switch which is disposed in a connecting path which connects the first power feeding path and the second power feeding path together;
an in-system switch which is disposed between a junction and the second power supply, the junction connecting between the second power feeding path and the connecting path;
a malfunction determiner which determines whether a malfunction has occurred in the second system when the system-to-system switch and the in-system switch are placed in a closed state;
a condition controller which works to open the system-to-system switch when the malfunction is determined by the malfunction determiner to have occurred; and
a voltage drop controller which works to control an opening-closing operation of the in-system switch when the condition controller opens the system-to-system switch, thereby limiting flow of an electrical current from the second power supply to the second system, the voltage drop controller also working to avoid an excessive drop in voltage, as applied to the system-to-system switch, which arises from a surge voltage generated in the second system due to limitation of the flow of the electrical current.