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Hybrid electric vehicle and power system thereof

A hybrid electric vehicle and power system technology, applied in the field of vehicles, can solve the problems of low motor speed, low power generation and power generation efficiency, and inability to meet the electricity demand for low-speed driving, so as to maintain low-speed electric balance and low-speed ride comfort, The effect of improving vehicle performance

Pending Publication Date: 2018-10-16
BYD CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, in related technologies, the front motor of a hybrid electric vehicle acts as a driving motor while also acting as a generator, which results in a low speed of the front motor during low-speed driving, and very low power generation and power generation efficiency, which cannot meet the needs of low-speed driving. It is relatively difficult for the whole vehicle to maintain low-speed electric balance

Method used

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  • Hybrid electric vehicle and power system thereof
  • Hybrid electric vehicle and power system thereof
  • Hybrid electric vehicle and power system thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0117] In some embodiments of the present invention, the control module 101 is used to obtain the SOC value (State of Charge, state of charge, also called remaining power) of the power battery 3, the SOC value of the low-voltage storage battery 20 and the maximum allowable generating power of the auxiliary motor 5 , and according to the SOC value of the power battery 3, the SOC value of the low-voltage battery 20 and the maximum allowable generating power of the auxiliary motor 5, it is judged whether the auxiliary motor 5 charges the power battery 3 and / or the low-voltage battery 20.

[0118] It should be noted that the SOC value of the power battery 3 and the SOC value of the low-voltage storage battery 20 can be collected by the battery management system of the hybrid electric vehicle, so that the battery management system will collect the SOC value of the power battery 3 and the SOC value of the low-voltage storage battery 20 Send to the control module 101, so that the cont...

Embodiment 2

[0142] In some embodiments of the present invention, the control module 101 is used to acquire the SOC value (State of Charge, state of charge, also called remaining power) of the power battery 3 and the vehicle speed V of the hybrid vehicle, and according to the SOC value of the power battery 3 and the vehicle speed V of the hybrid vehicle to control the auxiliary motor 5 to enter the generating power regulation mode, so that the engine 1 operates in the preset optimal economic zone. Wherein, the generating power adjustment mode is a mode for adjusting the generating power of the engine. In the generating power adjusting mode, the generating power of the auxiliary motor 5 can be adjusted by controlling the engine 1 to drive the auxiliary motor 5 to generate electricity.

[0143] It should be noted that the SOC value of the power battery 3 can be collected by the battery management system of the hybrid electric vehicle, so that the battery management system can send the collect...

Embodiment 3

[0206] In some embodiments of the present invention, the power system of the hybrid electric vehicle also includes a control module 101. During the running of the hybrid electric vehicle, the control module 101 is used to obtain the SOC value (State of Charge, state of charge) of the power battery 3 , also called the remaining power) and the vehicle speed V of the hybrid electric vehicle, and control the generated power P1 of the auxiliary motor 5 according to the SOC value of the power battery 3 and the vehicle speed V of the hybrid electric vehicle, and obtain the engine 1 according to the generated power P1 of the auxiliary motor 5 The generated power P0 is used to control the engine 1 to operate in the preset optimal economical area.

[0207] It should be noted that the SOC value of the power battery 3 can be collected by the battery management system of the hybrid electric vehicle, so that the battery management system can send the collected SOC value of the power battery ...

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Abstract

The invention discloses a hybrid electric vehicle and a power system thereof. The power system comprises an engine, a power motor, a power battery, DC-DC convertors and a vice motor. The engine outputs power to wheels of the hybrid electric vehicle through a clutch. The power motor is used for outputting driving force to the wheels of the hybrid electric vehicle. The power battery is used for supplying power to the power motor. The vice motor is connected with the power motor, the DC-DC convertors and the power battery. When generating power under driving of the engine, the vice motor chargesthe power battery and supplies the power to the power battery and the one or more DC-DC convertors, and thus vehicle low-speed electric balance and low-speed smoothness can be maintained.

Description

technical field [0001] The invention relates to the technical field of vehicles, in particular to a power system of a hybrid electric vehicle and a hybrid electric vehicle with the system. Background technique [0002] With the continuous consumption of energy, the development and utilization of new energy vehicles has gradually become a trend. As one of the new energy vehicles, a hybrid vehicle is driven by an engine and / or an electric motor. [0003] However, in related technologies, the front motor of a hybrid electric vehicle acts as a driving motor while also acting as a generator, which results in a low speed of the front motor during low-speed driving, and very low power generation and power generation efficiency, which cannot meet the needs of low-speed driving. It is relatively difficult for the whole vehicle to maintain low-speed electric balance. Contents of the invention [0004] The present invention aims to solve one of the technical problems in the related...

Claims

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Application Information

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IPC IPC(8): B60K6/24B60K6/26B60K6/28B60L11/12B60L3/00
CPCB60W20/00B60K6/24B60K6/26B60K6/28B60L3/00B60L50/15Y02T10/62
Inventor 杨冬生王春生白云辉
Owner BYD CO LTD
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