A hybrid electric vehicle energy matching method and system

Abstract

The invention applies to the technical field of hybrid electric vehicles, and provides a hybrid electric vehicle energy source matching method. The hybrid electric vehicle energy source matching method includes: receiving assigned specification consideration ranges of two energy sources which conform to the specification of the hybrid electric vehicle to be designed; screening matching combinations of energy sources in the specification consideration ranges according to requirements of vehicle driving performance, and selecting an effective matching combination; selecting the best energy source matching from the selected effective matching combination according to matching criteria. According to the hybrid electric vehicle energy source matching method, power system quality discrepancy caused by different energy source matching modes is considered, or in other words, different constraint conditions are used to judge effectiveness of the different energy source matching modes. The hybrid electric vehicle energy source matching method uses a hybrid electric vehicle energy management strategy based on optimal control theory when evaluates matched fuel economy, and then can obtain an optimal fuel consumption result for each energy source matching mode, and thereby fairly compares all the matched fuel consumption results, and furthermore can save a large amount of simulation time.

Description

technical field [0001] The invention belongs to the technical field of hybrid electric vehicles, and in particular relates to a method and system for energy matching of hybrid electric vehicles. Background technique [0002] Energy matching is the first stage of hybrid vehicle design, and the subsequent design work can only be carried out after the matching is completed. Energy matching results directly affect the performance of hybrid vehicles, such as drivability and factors such as fuel economy and total cost. The standard of energy matching of hybrid electric vehicles is usually to find out the matching with the best fuel economy or the lowest total cost or satisfying other conditions, among which, the most commonly used matching standard is fuel economy. The fuel consumption of hybrid vehicles is largely affected by energy management strategies. If different energy management strategies are used to obtain different optimal energy matching, the meaning of matching will ...

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Problems solved by technology

[0004] The purpose of the present invention is to provide a hybrid electric vehicle energy matching method and system, aiming at solving the problem in the prior art that the quality difference of the power system caused by different energy matching is not considered when selecting an effective energy matching combination. problems; and when selecting the best energy match according to the matching criteria related to fuel consumption, the energy management strategy that considers the range of battery use was used to compare the energy matches, but this method may cause problems when other hybrids are used. Possible changes in optimal energy matching when powering vehicle energy management strategies

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