Hybrid vehicle energy managing method and system considering service life of battery

Abstract

The invention relates to a hybrid vehicle energy managing method considering the service life of a battery. The method includes the following steps of firstly, collecting current vehicle running state data and battery running state data; secondly, establishing a vehicle model, and predicting the vehicle running state and the battery running state within a period of time in the future according to the vehicle model; thirdly, calculating the sum of battery capacity attenuation cost and the sum of oil consumption cost within a period of time in the future; fourthly, establishing a multi-target control model, and obtaining the optimal control amount meeting the optimization target through a multi-target coordination control algorithm, wherein the multi-target control model comprises a target function J* and a constraint condition C; fifthly, forming a control signal according to the optimal control amount, and controlling the running state of a vehicle. Compared with the prior art, the method has the advantages of being good in control effect, capable of effectively prolonging the service life of the battery, reducing the total use cost of the vehicle, and the like.

Description

Technical field [0001] The present invention relates to the technical field of energy management for hybrid electric vehicles, and in particular to a hybrid electric vehicle energy management method and system considering battery life. Background technique [0002] The rising prices of petrochemical fuels and the emergence of environmental problems have promoted the development of environmentally friendly and energy-saving new green vehicles. Pure electric vehicles, hybrid vehicles and fuel cell vehicles can all be used as new types of green vehicles. Compared with traditional vehicles, they have higher efficiency and lower emissions, which has become a new trend in the development of the automotive industry. Pure electric vehicles are not yet mature enough in power battery technology, such as insufficient endurance, poor battery safety, and battery life, which cannot be widely used in applications; fuel cell vehicles are due to technical obstacles such as fuel storage and energy...

AI Technical Summary

Problems solved by technology

If you only care about fuel consumption in energy management, it will make the battery in an unhealthy operating state and affect its normal use time

[0005] The document Battery State-of-Health Perceptive Energy Management for Hybrid Electric Vehicles (S.Ebbesen, P.Elbert and L.Guzzella,.IEEE Trans.on Vehicular Technology, 2012.61(7):p.2893-2900) proposes to consider battery health state hybrid vehicle energy management strategy, but because it does not consider the impact of battery life cost, it cannot be coordinated with fuel consumption cost, and the control effect is not ideal

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