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

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...

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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

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