Search International and National Patent Collections

1. (WO2018177358) HYBRID ELECTRIC VEHICLE, POWER SYSTEM THEREOF, AND POWER GENERATION CONTROL METHOD THEREFOR

Pub. No.:    WO/2018/177358    International Application No.:    PCT/CN2018/081044
Publication Date: Fri Oct 05 01:59:59 CEST 2018 International Filing Date: Fri Mar 30 01:59:59 CEST 2018
IPC: B60K 6/28
B60K 6/40
Applicants: BYD COMPANY LIMITED
比亚迪股份有限公司
Inventors: CHEN, Xinli
陈新立
MU, Jinhui
穆金辉
XU, Boliang
许伯良
YU, Junxin
余俊鑫
Title: HYBRID ELECTRIC VEHICLE, POWER SYSTEM THEREOF, AND POWER GENERATION CONTROL METHOD THEREFOR
Abstract:
A power system of a hybrid electric vehicle, comprising: an engine (1) used for outputting power to wheels (7) of the hybrid electric vehicle by means of a clutch (6); a power motor (2) used for outputting driving force to the wheels (7) of the hybrid electric vehicle; a power battery (3) used for powering the power motor (2); a DC-DC converter (4); a low-voltage storage battery (20) connected to the DC-DC converter (4); a secondary motor (5) connected to the engine (1), the secondary motor (5) being connected to the power motor (2), the DC-DC converter (4), and the power battery (3) separately, and the secondary motor (5) being driven by the engine (1) to generate power; and a control module (101) used for obtaining an SOC value of the power battery (3), an SOC value of the low-voltage storage battery (20), and the maximum allowable generated output of the secondary motor (5), and determining whether to charge the power battery (3) and/or the low-voltage storage battery (20) or not according to the SOC value of the power battery (3), the SOC value of the low-voltage storage battery (20), and the maximum allowable generated output of the secondary motor (5). The power system of the hybrid electric vehicle can maintain the low-speed electric balance and low-speed smoothness of the vehicle, ensure that the power motor drives the vehicle to run normally and ensure power demands of the low-voltage electric devices, as well as ensure that the vehicle can drive in a pure fuel mode to increase the vehicle mileage when the secondary motor stops power generation and the power battery fails or is of low power. Also provided are a hybrid electric vehicle, a power generation control method therefor, and a computer readable storage medium.