Range-extending electric vehicle energy management method and system capable of achieving on-line self-regulation

Abstract

The invention relates to a range-extending electric vehicle energy management method and system capable of achieving on-line self-regulation. The range-extending electric vehicle energy management method includes the first step that a control end vehicle controller VMS measures corresponding energy source parameters under different SOC parameter values in the real vehicle driving process, the second step that according to the energy source parameters, the condition that energy source charge and discharge efficiency changes along with power is obtained, and according to a minimum power loss calculation method of a power system of a range-extending electric vehicle and by using a BP neural network fitting method, an energy management control rule is fitted and regulated so as to achieve on-line updating of the energy management control rule, and the third step that the VMS combines with the energy management control rule to control the power output distribution of a hybrid power system in real time according to the SOC parameters of the hybrid power system and vehicle demand power. Compared with the prior art, the range-extending electric vehicle energy management method and system improve the accuracy of electric vehicle energy management control and the fuel economy of the hybrid power system, and have good engineering practical value.

Description

technical field [0001] The invention relates to the technical field of energy saving of environmentally friendly vehicles, in particular to an energy management method and system for an extended-range electric vehicle that can be self-adjusted online and based on the minimum power loss. Background technique [0002] With its good economy and environmental protection, electric vehicles have become the main trend of future automobile development. At present, the research and development directions of electric vehicles are roughly divided into three categories: pure electric vehicles (Electric Vehicle, EV), hybrid electric vehicles (Hybrid Electric Vehicle, HEV) and fuel cell electric vehicles (Fuel Cell Electric Vehicle, FCEV). Judging from the current technological development trend, pure electric vehicles have the advantages of diversified energy sources and simple structure, but due to the constraints of battery performance, there are problems such as long charging time and...

AI Technical Summary

Problems solved by technology

If the fixed control rules formulated by the off-line method are always used, the distribution relationship between the power output of the battery and the fuel cell will not be optimal, and the power loss at each point will not be minimized, and there will be a large difference compared with the actual situation, or even May cause energy management algorithms to fail

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