An energy management control method for extended-range electric vehicles based on intelligent optimization

Abstract

The invention discloses an energy management control method for an extended-range electric vehicle based on multi-objective optimization. The engine output power corresponding to the operating point is P1, P2, and P3 respectively; set two battery SOC trigger points and two vehicle speed trigger points, and adjust the engine operating point according to different power battery SOC values ​​and current vehicle speed values. switch, and distribute energy to the whole vehicle under different loads; use the genetic algorithm with non-dominated sorting with elite strategy to optimize the output power of the engine operating point with multi-objective; bring the optimized operating point parameters into the original In the multi-operating point control strategy, the purpose of better fuel and emission performance has been achieved.

Description

technical field [0001] The invention belongs to the technical field of new energy vehicles, and particularly relates to an energy management and control method for an extended-range electric vehicle. Background technique [0002] In recent years, countries around the world have vigorously developed new energy vehicles in order to reduce the impact of air pollution and the greenhouse effect on the environment. Among them, pure electric vehicles are affected by the low energy density of their power batteries, high cost and short driving range, and are currently hindered in the process of promotion. However, the extended-range electric vehicle, because of its small power battery, low cost, and considerable driving range, is called the current research hotspot of new energy vehicles. [0003] The core components of the power system of the extended-range electric vehicle include auxiliary power unit (APU), power battery system, drive motor and its control system, thermal managem...

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problems of power battery life attenuation and low engine efficiency in the existing control technology of range-extended electric vehicles, the present invention provides an energy management control method for range-extended electric vehicles based on multi-objective optimization. On the basis of the multi-point control strategy, the multi-objective optimization method is applied to optimize the output power of the set engine operating point, and the optimized operating point parameters are brought into the original multi-operating point control strategy. The purpose of better fuel and emission performance can improve the fuel economy and emission performance of extended-range electric vehicles, and improve urban air quality to a certain extent

Images