Hybrid power vehicle and control method thereof

Abstract

The invention discloses a hybrid power vehicle. The hybrid power vehicle comprises a power battery system, a range extender system, an electric driving system electrically connected with each of the power battery system the range extender system and capable of driving the vehicle to move by utilizing the electric energy, and an electric power coupling system for realizing the current control amongthe power battery system, the range extender system and the electric driving system. The hybrid power vehicle disclosed by the embodiment of the invention can reduce the complexity degree of the power system of the hybrid power vehicle, and correspondingly improves the energy utilization efficiency of the vehicle.

Description

technical field [0001] The invention relates to the field of engineering vehicles, in particular to a hybrid vehicle and a control method thereof. Background technique [0002] With people's increasingly stringent requirements for environmental protection, it is imperative to develop low-emission and low-pollution electric vehicles. However, due to the lack of breakthroughs in power battery technology, the battery module is difficult to miniaturize, and the short mileage and long charging time limit the development of pure electric vehicles. At this time, the gasoline-electric hybrid vehicle combines the existing internal combustion engine with a certain capacity energy storage device (mainly a power battery or a super capacitor) through a corresponding control method, so that the vehicle has lower fuel consumption and higher energy efficiency. The energy efficiency is increasingly favored by people. [0003] The existing power schemes of gasoline-electric hybrid vehicles ...

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Problems solved by technology

[0003] The existing power schemes of gasoline-electric hybrid vehicles are mainly divided into two types. One is the dual-motor mechanical coupling method, that is, the motor used in the range extender system and the motor driven by the power battery are mechanically coupled through a planetary row structure. , this power coupling method requires a mechanical structure coupler, resulting in high vehicle processing costs, a large power system, making the layout of the vehicle inconvenient, and with the change of the speed of the range extender, the engine efficiency and fuel economy cannot be guaranteed, making the overall efficiency lower

The second is to use the range extender system in series with the power battery system to drive the motor. This way makes the power battery often in the working state of alternate charge and discharge, which easily affects the life of the power battery. Charging the power battery to reduce the cruising range of the vehicle

[0004] In addition, for engineering vehicles, due to the variety of driving operation scenarios and the large variation of vehicle loads, it is difficult for related gasoline-electric hybrid vehicles to meet the energy requirements of engineering vehicles, and cannot be used in extreme scenarios such as climbing and heavy loads of engineering vehicles. Provide sufficient power under

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