US 11,843,315 B2
In-vehicle backup power supply device
Koki Uchida, Yokkaichi (JP)
Assigned to AutoNetworks Technologies, Ltd., Yokkaichi (JP); Sumitomo Wiring Systems, Ltd., Yokkaichi (JP); and Sumitomo Electric Industries, Ltd., Osaka (JP)
Appl. No. 17/612,615
Filed by AutoNetworks Technologies, Ltd., Yokkaichi (JP); Sumitomo Wiring Systems, Ltd., Yokkaichi (JP); and Sumitomo Electric Industries, Ltd., Osaka (JP)
PCT Filed May 11, 2020, PCT No. PCT/JP2020/018760
§ 371(c)(1), (2) Date Nov. 19, 2021,
PCT Pub. No. WO2020/241214, PCT Pub. Date Dec. 3, 2020.
Claims priority of application No. 2019-098237 (JP), filed on May 27, 2019.
Prior Publication US 2022/0224147 A1, Jul. 14, 2022
Int. Cl. B60R 16/033 (2006.01); H02M 3/00 (2006.01); H02J 7/00 (2006.01); H02J 9/06 (2006.01)
CPC H02M 3/00 (2013.01) [B60R 16/033 (2013.01); H02J 7/0016 (2013.01); H02J 7/0063 (2013.01); H02J 9/061 (2013.01); H02J 2207/20 (2020.01)] 8 Claims
OG exemplary drawing
 
1. An in-vehicle backup power supply device in an in-vehicle power supply system, the in-vehicle backup power supply device comprising:
a battery unit in which a plurality of unit batteries are connected in series;
a discharge circuit configured to perform a first discharge operation for supplying power to a conductive path on a load side based on a charge accumulated in the battery unit;
a balance circuit configured to perform a cell balancing operation on the battery unit; and
a control unit configured to control the balance circuit,
wherein the balance circuit is configured to perform a second discharge operation for supplying power to the conductive path on the load side based on a charge accumulated in a plurality of power storage elements, and
the control unit performs a first control for causing the balance circuit to perform the cell balancing operation and a second control for causing the balance circuit to perform the second discharge operation, and if a failure occurs in which the first discharge operation is not normally performed, performs the second control.