A test method for instantaneous efficiency of composite power supply system in vehicle environment

Abstract

The invention discloses a method for testing the instantaneous efficiency of a composite power supply system in a vehicle environment. The method comprises first determining the test condition, the number of test times and the load demand power set of a test vehicle in a vehicle environment; subjecting all load demand power in the set to a cyclic working condition test, recording the data at eachtest sampling moment to obtain a total sampling matrix; using a single sampling matrix as an input, successively determining the operating mode of the sampling data by using the state vectors at all sampling moments, and calculating the sampling data at different operating modes by using different instantaneous efficiency formulas to obtain the instantaneous efficiency mean value of three operating modes under the load demand power; finally, obtaining a test output matrix. The invention improves the method for testing the instantaneous efficiency of the composite power supply system, thereby realizing a purpose of quantifying the instantaneous efficiency, and providing an important basis for the formulation of subsequent relevant control strategy of the composite vehicle power supply system.

Description

technical field [0001] The invention belongs to the field of vehicle energy management, and mainly relates to a test method for the instantaneous efficiency of a composite power supply system in a vehicle environment. Background technique [0002] With the increase of automobile bus technology and vehicle-mounted electrical equipment, the proportion of electric energy consumption in the energy consumption of the whole vehicle is also increasing. The research on the composite power supply system of the whole vehicle has also become a hot issue in the field of vehicle energy management. [0003] The hybrid power system was only used in electric vehicles at first, and with the popularization of power management technology, it was gradually applied in hybrid and traditional vehicles. Based on the traditional automotive power system, it adds components such as smart generators, battery sensors and super capacitors, and uses the partition management of batteries to monitor electr...

AI Technical Summary

Problems solved by technology

However, due to the complexity and variability of vehicle driving conditions, the simulation results can only partially reflect the efficiency of the composite power system, and there is a lack of specific test methods for instantaneous efficiency under vehicle test conditions

At present, most of the research on the energy efficiency of the composite power system stays in the field of electric vehicles, but there are few studies on the traditional vehicle composite power system. Although the working mode is divided, the specific influencing factors are not divided, which is not conducive to the control of the power system. strategy formulation

In addition, although the existing research has built a composite power system test platform, it is only for testing its stability and related performance, and does not give a test method for instantaneous efficiency, so it is impossible to measure the instantaneous efficiency of the composite power system from a numerical level

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