Power control method of combined hybrid electric vehicle

Abstract

The invention provides a power control method of a combined hybrid electric vehicle, belonging to the technical field of hybrid electric vehicles. The power control method comprises the following steps of: setting vehicle speed when an engine is accessed to a driving system, comparing the vehicle speed with actual vehicle speed in real time, calculating and comparing vehicle power demand and power which can be continuously provided by a power battery in real time, and according to the comparison result, determining the vehicle to work in a pure electric power state, a series hybrid power state or a parallel hybrid power state. When the vehicle works in the series hybrid power state, one of the engine and the power battery is determined to be used as a main power source according to a calibrated power source distribution function, and the other one of the engine and the power battery is used for compensating the rest vehicle power demand. Compared with the traditional control method, the power control method of the combined hybrid electric vehicle has the advantages that the method is simpler, the performance of the engine, the power battery and the driving motor is fully considered, and the power performance and the economy of the entire vehicle are improved.

Description

technical field [0001] The invention belongs to the technical field of hybrid electric vehicles, and in particular relates to a power control method of electric vehicles. Background technique [0002] Hybrid electric vehicle has multiple power sources, combines the advantages of traditional drive system and electric drive system, can greatly reduce emissions and reduce fuel consumption, and can achieve a larger range. Before there is no breakthrough in battery technology, and the problems of low mileage and high cost of pure electric vehicles are solved, hybrid power is the best technical solution. [0003] Since there are multiple power sources, the cooperative work between the power components is the key to the control of the whole vehicle. At the same time, the power battery is the main part of the cost of new energy vehicles. When formulating control strategies, attention should be paid to protecting the power battery and improving the performance of the power battery. ...

AI Technical Summary

Problems solved by technology

This control strategy takes into account the optimization of the performance and efficiency of the engine, drive motor and power battery under various working conditions. It is a more scientific and reasonable control strategy for the hybrid power system, but this strategy involves steady-state and dynamic The optimization and correction of the two aspects are more complicated, the development cost is high, and it is difficult to realize

[0007] At present, various power control methods or control parameters are insufficient, and the advantages of each power component cannot be fully utilized; or the control method is too complicated, the amount of calculation is too large, and the requirements for vehicle control stability are too high, so it is difficult to truly realize industrialization; Insufficient consideration is given to the factors affecting battery life, which will greatly damage the life of the power battery while obtaining the corresponding performance

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