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Patent Searching and Data


Title:
HYBRID ELECTRIC VEHICLE, POWER SYSTEM THEREOF, AND POWER GENERATION CONTROL METHOD THEREFOR
Document Type and Number:
WIPO Patent Application WO/2018/177358
Kind Code:
A1
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.

Inventors:
CHEN XINLI (CN)
MU JINHUI (CN)
XU BOLIANG (CN)
YU JUNXIN (CN)
Application Number:
PCT/CN2018/081044
Publication Date:
October 04, 2018
Filing Date:
March 29, 2018
Export Citation:
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Assignee:
BYD CO LTD (CN)
International Classes:
B60K6/28; B60K6/40
Foreign References:
CN206678765U2017-11-28
CN206983710U2018-02-09
CN104955699A2015-09-30
CN101346251A2009-01-14
JP2002152913A2002-05-24
US20040006414A12004-01-08
Other References:
See also references of EP 3604011A4
Attorney, Agent or Firm:
UNITALEN ATTORNEYS AT LAW (CN)
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