US 12,322,562 B2
Protective device, energy storage apparatus, and method for reducing contact resistance of relay
Akihito Umeda, Kyoto (JP); and Takeyuki Shiraishi, Kyoto (JP)
Assigned to GS YUASA INTERNATIONAL LTD., Kyoto (JP)
Appl. No. 17/641,738
Filed by GS Yuasa International Ltd., Kyoto (JP)
PCT Filed Aug. 18, 2020, PCT No. PCT/JP2020/031048
§ 371(c)(1), (2) Date Mar. 9, 2022,
PCT Pub. No. WO2021/039482, PCT Pub. Date Mar. 4, 2021.
Claims priority of application No. 2019-155690 (JP), filed on Aug. 28, 2019.
Prior Publication US 2022/0301795 A1, Sep. 22, 2022
Int. Cl. H01H 47/00 (2006.01); G01R 31/327 (2006.01); H01H 47/22 (2006.01)
CPC H01H 47/002 (2013.01) [G01R 31/3274 (2013.01); H01H 47/22 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A protective device comprising:
a relay including a contact that opens and closes a current path of a cell;
a bypass circuit connected in parallel to the relay; and
a control device that controls the relay and the bypass circuit,
wherein the control device executes a reduction processing of reducing a contact resistance of the relay, and
wherein the control device executes the reduction processing when a current of the cell is equal to or less than a predetermined value and a CLOSE state of the contact continues for a predetermined period.