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Title:
HYBRID ELECTRIC VEHICLE AND POWER SYSTEM THEREOF, AND POWER GENERATION CONTROL METHOD
Document Type and Number:
WIPO Patent Application WO/2018/177356
Kind Code:
A1
Abstract:
Provided is a power system of a hybrid electric vehicle. The power system comprises: an engine (1) for outputting power to wheels (7) of a hybrid electric vehicle by means of a clutch (6); a power electric motor (2) for outputting a driving force to the wheels (7) of the hybrid electric vehicle; a power battery (3) for supplying power to the power electric motor (2); a DC-DC converter (4); a low-voltage storage battery (20) connected to the DC-DC converter (4); a secondary electric motor (5) connected to the engine (1), the secondary electric motor (5) being respectively connected to the power electric motor (2), the DC-DC converter (4) and the power battery (3), and the secondary electric motor (5) being driven by the engine (1) to generate power; and a control module (101) for controlling the secondary electric motor (5) so that same enters a generation power regulation mode according to an SOC value of the power battery (3), and the speed of the hybrid electric vehicle, so that the engine (1) operates in a pre-set best economic area, wherein after the secondary electric motor (5) enters the generation power regulation mode, the generation power of the secondary electric motor (5) is also regulated according to an SOC value of the low-voltage storage battery (20). The power system of the hybrid electric vehicle can maintain the low-speed electric power balance and low-speed ride comfort of a whole vehicle and improve the economical efficiency of the operation of the whole vehicle. Further provided are a hybrid electric vehicle, a power generation control method for the hybrid electric vehicle, and a computer-readable storage medium.

Inventors:
XIE WU (CN)
CHEN XINLI (CN)
LIU XUELI (CN)
LI JIALIN (CN)
Application Number:
PCT/CN2018/081042
Publication Date:
October 04, 2018
Filing Date:
March 29, 2018
Export Citation:
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Assignee:
BYD CO LTD (CN)
International Classes:
B60K6/26; B60K6/40
Foreign References:
CN206678765U2017-11-28
CN206983710U2018-02-09
CN104955699A2015-09-30
CN101402360A2009-04-08
CN105730438A2016-07-06
JP2009234359A2009-10-15
JP2010143310A2010-07-01
JP2016155410A2016-09-01
Attorney, Agent or Firm:
UNITALEN ATTORNEYS AT LAW (CN)
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