US 11,881,740 B2
Backup power supply system for shift-by-wire system and non-transitory storage medium
Youichi Kageyama, Osaka (JP); and Hiroki Kato, Saitama (JP)
Assigned to PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD., Osaka (JP); and HONDA MOTOR CO., LTD., Tokyo (JP)
Appl. No. 17/431,022
Filed by PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD., Osaka (JP); and HONDA MOTOR CO., LTD., Tokyo (JP)
PCT Filed Dec. 24, 2019, PCT No. PCT/JP2019/050449
§ 371(c)(1), (2) Date Aug. 13, 2021,
PCT Pub. No. WO2020/166210, PCT Pub. Date Aug. 20, 2020.
Claims priority of application No. 2019-025634 (JP), filed on Feb. 15, 2019.
Prior Publication US 2022/0123585 A1, Apr. 21, 2022
Int. Cl. H02J 9/06 (2006.01); H02J 7/34 (2006.01)
CPC H02J 9/061 (2013.01) [H02J 7/342 (2020.01); H02J 2207/10 (2020.01)] 7 Claims
OG exemplary drawing
 
1. A backup power supply system for a shift-by-wire system, the backup power supply system comprising:
a power storage unit configured to, when a mains power supply that supplies power to the shift-by-wire system goes out of order, supply power to the shift-by-wire system; and
a control unit configured to, when at least one of a first condition or a second condition is satisfied, output an instruction signal to the shift-by-wire system, the instruction signal instructing that a shift range of an automatic transmission be changed into a parking range,
the first condition requiring that duration for which output voltage of the mains power supply remains equal to or less than a first voltage threshold value be longer than a first duration,
the second condition requiring that duration for which the output voltage of the mains power supply remains equal to or less than a second voltage threshold value be longer than a second duration, the second voltage threshold value being smaller than the first voltage threshold value, the second duration being shorter than the first duration.