US 11,984,758 B2
In-vehicle backup power source control apparatus and in-vehicle backup power source apparatus
Hisanori Kambara, Yokkaichi (JP)
Assigned to AutoNetworks Technologies, Ltd., Yokkaichi (JP); Sumitomo Wiring Systems, Ltd., Yokkaichi (JP); and Sumitomo Electric Industries, Ltd., Osaka (JP)
Appl. No. 17/299,617
Filed by AUTONETWORKS TECHNOLOGIES, LTD., Yokkaichi (JP); SUMITOMO WIRING SYSTEMS, LTD., Yokkaichi (JP); and SUMITOMO ELECTRIC INDUSTRIES, LTD., Osaka (JP)
PCT Filed Nov. 27, 2019, PCT No. PCT/JP2019/046262
§ 371(c)(1), (2) Date Jun. 3, 2021,
PCT Pub. No. WO2020/116260, PCT Pub. Date Jun. 11, 2020.
Claims priority of application No. 2018-226488 (JP), filed on Dec. 3, 2018.
Prior Publication US 2022/0021233 A1, Jan. 20, 2022
Int. Cl. H02J 9/06 (2006.01); B60L 50/60 (2019.01); H01M 10/44 (2006.01); H01M 10/48 (2006.01); H02J 7/00 (2006.01); H02J 7/34 (2006.01)
CPC H02J 9/061 (2013.01) [B60L 50/60 (2019.02); H01M 10/44 (2013.01); H01M 10/48 (2013.01); H02J 7/0063 (2013.01); H02J 7/34 (2013.01); H01M 2220/20 (2013.01)] 7 Claims
OG exemplary drawing
 
1. An in-vehicle backup power source control apparatus that controls power supply from a power storage unit that is an in-vehicle battery, in an in-vehicle power source system that includes a power source unit and the power storage unit and in which power from the power source unit is supplied to a power supply target via a power path, the apparatus comprising:
a first discharge unit that performs a first discharge operation of supplying a discharge current that is based on power supply from the power storage unit, to the power path via a first discharge path;
a second discharge unit that performs a second discharge operation of supplying a discharge current that is based on power supply from the power storage unit, toward the power supply target via a second discharge path that is different from the first discharge path;
a first control unit that causes the first discharge unit to perform the first discharge operation only when power supply that is based on the power source unit enters a failure state; and
a second control unit that causes the second discharge unit to perform the second discharge operation only when power supply that is based on the power source unit enters the failure state or the first discharge operation performed by the first discharge unit is in an abnormal state,
a switch unit that is disposed on the power path and interposed between a connection portion of the first discharge path and the power supply target,
wherein the switch unit switches between an on-state and an off-state, and permits power supply from the power source unit side to the power supply target side in the on-state, and shuts off power supply from the power source unit side to the power supply target side in the off-state,
the second discharge path is electrically connected on the power supply target side relative to the switch unit on the power path, and
wherein the second control unit is connected to the power path at a node interposed between the connection portion and the switch unit so as to detect the discharge current from the first discharge unit and power supply from the power source unit; and
wherein the second control unit switches the switch unit to the off-state only when power supply that is based on the power source unit enters the failure state and at least the first discharge operation that is performed by the first discharge unit is in the abnormal state.