US 11,923,719 B2
Energy recovery control method, system, and vehicle
Yinlei Wang, Baoding (CN); Tong Kang, Baoding (CN); Gengnan Zhang, Baoding (CN); Zhenmin Jiang, Baoding (CN); Baogang Wang, Baoding (CN); and Xiu Liu, Baoding (CN)
Assigned to GREAT WALL MOTOR COMPANY LIMITED, Baoding (CN)
Appl. No. 17/790,152
Filed by GREAT WALL MOTOR COMPANY LIMITED, Baoding (CN)
PCT Filed Jan. 11, 2021, PCT No. PCT/CN2021/071104
§ 371(c)(1), (2) Date Jun. 30, 2022,
PCT Pub. No. WO2021/169633, PCT Pub. Date Sep. 2, 2021.
Claims priority of application No. 202010113378.8 (CN), filed on Feb. 24, 2020.
Prior Publication US 2023/0040763 A1, Feb. 9, 2023
Int. Cl. H02J 7/14 (2006.01); B60L 7/10 (2006.01); B60L 58/15 (2019.01)
CPC H02J 7/1469 (2013.01) [B60L 7/10 (2013.01); B60L 58/15 (2019.02); H02J 7/1446 (2013.01); B60L 2240/423 (2013.01); B60L 2240/54 (2013.01)] 16 Claims
OG exemplary drawing
 
1. An energy recovery controlling method, applied to a vehicle, the vehicle comprising a driving electric motor and a battery electrically connected to the driving electric motor, wherein the vehicle is pre-configured with a first energy-recovery-torque curve for the driving electric motor, the first energy-recovery-torque curve is used to indicate a correspondence relationship between an energy-recovery torque of the driving electric motor and a vehicle speed, and the method comprises the steps of:
by one or more processors, determining a first target-recovery-power upper-limit value according to the first energy-recovery-torque curve;
by one or more processors, determining an available-charging-power upper-limit value of the battery;
by one or more processors, when the available-charging-power upper-limit value is less than the first target-recovery-power upper-limit value, determining an inflection-point vehicle speed according to the available-charging-power upper-limit value and the first energy-recovery-torque curve, wherein the inflection-point vehicle speed refers to a vehicle speed that corresponds to a torque point in the first energy-recovery-torque curve where an energy-recovery power is equal to the available-charging-power upper-limit value;
by one or more processors, detecting an energy-recovery signal and a current vehicle speed of the vehicle, and determining a reduction proportion of the first energy-recovery-torque curve according to a result of the detection of the energy-recovery signal, the current vehicle speed, the inflection-point vehicle speed, the available-charging-power upper-limit value, and the first target-recovery-power upper-limit value;
by one or more processors, performing a reducing adjustment to the first energy-recovery-torque curve according to the reduction proportion, to form a second energy-recovery-torque curve; and
by one or more processors, when the available-charging-power upper-limit value is less than the first target-recovery-power upper-limit value, according to the second energy-recovery-torque curve, controlling the driving electric motor to recover energy, and charging the battery when the energy-recovery signal is detected.