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Hybrid electric vehicle and power system and power generation control method thereof

A hybrid vehicle and power system technology, applied in the field of vehicles, can solve the problems of low power generation and power generation efficiency of motor generators, low speed of motor generators, and difficulty in low-speed electrical balance, so as to maintain low-speed electrical balance and low-speed smoothness. , the effect of improving the performance of the vehicle

Active Publication Date: 2018-10-16
BYD CO LTD
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  • Claims
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Problems solved by technology

[0003] However, in the related art, the motor-generator of the hybrid electric vehicle acts as a driving motor while also acting as a generator, which results in a low rotation speed of the motor-generator when driving at low speed, and the power and efficiency of the motor-generator are also very low. Low, so that it cannot meet the electricity demand for low-speed driving, and 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 and power generation control method thereof
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Embodiment Construction

[0023] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

[0024] Refer below Figure 1-5 A power system of a hybrid electric vehicle proposed in an embodiment of the present invention will be described. The power system provides sufficient power and electric energy for the normal running of the hybrid electric vehicle.

[0025] figure 1 is a schematic block diagram of a power system of a hybrid electric vehicle according to an embodiment of the present invention. Such as figure 1 As shown, the power system of the hybrid electric vehicle includes: an engine 1 , a power motor 2 , a pow...

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Abstract

The invention discloses a hybrid electric vehicle and a power system and power generation control method thereof. The power system comprises an engine, a power motor, a power battery, a DC-DC converter, a low-voltage storage battery, an auxiliary motor and a control module. 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 low-voltage storage battery is connected with the DC-DC converter. The auxiliary motor is connected to the engine, the auxiliary motor is separately connected to the power motor, the DC-DC converter and the power battery, and the auxiliary motor generates electricity under driving of the engine. The control module is used for obtaining an SOC value of the power battery, an SOC value of the low-voltage storage battery and the maximum permissible generation power of theauxiliary motor, and determining whether the auxiliary motor charges the power battery and / or the low-voltage storage battery or not according to the SOC value of the power battery, the SOC value ofthe low-voltage storage battery and the maximum permissible generation power of the auxiliary motor, thereby maintaining low-speed electric balance and low-speed smoothness of the whole vehicle.

Description

technical field [0001] The invention relates to the technical field of vehicles, in particular to a power system of a hybrid electric vehicle, a hybrid electric vehicle with the system, a power generation control method of the hybrid electric vehicle and a computer-readable storage medium. 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 the related art, the motor-generator of the hybrid vehicle acts as a driving motor while also acting as a generator, which results in a low rotation speed of the motor-generator during low-speed driving, and the power and efficiency of the motor-generator are also very low. Low, so that it cannot meet the electricity demand for low-speed driving, and it is relatively difficult for the whole vehicle to maintain low...

Claims

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Application Information

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IPC IPC(8): B60K6/26B60K6/28
CPCB60K6/26B60K6/28B60K6/387B60K6/48B60K6/485B60K6/52B60K6/547B60K2006/268B60K2006/4808B60L1/00B60L15/2045B60L2210/10B60W10/06B60W10/08B60W2510/085B60W2510/244B60W20/13B60L50/61B60L58/20Y02T10/62Y02T10/64Y02T10/70Y02T10/72Y02T10/92
Inventor 陈新立穆金辉许伯良余俊鑫
Owner BYD CO LTD
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