US 11,982,574 B2
Protection system for electromagnetic relay
Yukio Karasawa, Tokyo (JP)
Assigned to SUBARU CORPORATION, Tokyo (JP)
Filed by SUBARU CORPORATION, Tokyo (JP)
Filed on Jul. 27, 2022, as Appl. No. 17/875,039.
Claims priority of application No. 2021-149651 (JP), filed on Sep. 14, 2021.
Prior Publication US 2023/0081030 A1, Mar. 16, 2023
Int. Cl. G01K 3/00 (2006.01); H02H 5/04 (2006.01)
CPC G01K 3/005 (2013.01) [H02H 5/042 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A protection system for an electromagnetic relay mounted on a vehicle, the protection system being configured to protect the electromagnetic relay from causing a coupling failure due to freezing of the electromagnetic relay, the protection system comprising:
a temperature detector configured to sequentially measure an ambient temperature of a location in which the electromagnetic relay is disposed and output information on a change in the ambient temperature;
a cooler configured to cool an electric power line coupled to a fixing terminal of the electromagnetic relay; and
a control unit configured to activate the cooler to cool the electric power line in a case where the control unit determines that the electromagnetic relay has a possibility of freezing on a basis of the information on the change in the ambient temperature from the temperature detector.