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A real-time optimal control method for planetary hybrid electric vehicle considering battery life

A technology for battery life and optimal control, applied in hybrid vehicles, motor vehicles, transportation and packaging, etc., can solve problems such as large amount of calculation, difficult to apply online and real-time, and achieve the effect of reducing costs

Active Publication Date: 2022-03-25
JILIN UNIV
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  • Application Information

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Problems solved by technology

The dynamic programming strategy is a global optimization method that can optimally solve the power distribution problem of hybrid electric vehicles, but its reverse calculation characteristics make its calculation amount huge, and it needs to know the driving conditions, so it is difficult to apply online in real time

Method used

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  • A real-time optimal control method for planetary hybrid electric vehicle considering battery life
  • A real-time optimal control method for planetary hybrid electric vehicle considering battery life
  • A real-time optimal control method for planetary hybrid electric vehicle considering battery life

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Embodiment Construction

[0049] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0050] (1) Establish a multi-objective control model that comprehensively considers vehicle fuel consumption and battery life attenuation. The model includes objective functions and constraints, and uses an equivalent fuel consumption minimization control strategy for online real-time optimization;

[0051] (2) According to the mileage information obtained from the on-board interconnection equipment, plan the reference battery state of charge (SOC) curve, so that the SOC of the power battery reaches the battery SOC target value of the power retention mode at the end of the operation, that is, the whole vehicle always works in the power consumption mode , make full use of electric energy and make the engine always work in the high-efficiency zone. As the driving mileage increases, the SOC decreases linearly, and the reference SOC trajectory is a...

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Abstract

The invention relates to a real-time optimization control method for a planetary hybrid electric vehicle considering battery life, comprising the following steps: according to the working mode and usage characteristics of a plug-in hybrid electric vehicle, establishing a balanced consideration of the vehicle's equivalent fuel consumption and battery life loss cost The multi-objective optimization control strategy uses the state of charge (SOC) of the power battery as the state variable, and the battery power as the control variable. By introducing the weight coefficient, the sum of the equivalent fuel consumption of the car and the battery life loss is used as the objective function. Form a multi-objective optimization problem; obtain the mileage information according to the vehicle-mounted interconnection equipment, plan the reference SOC curve, use the PI control algorithm to correct the equivalent factor, and then use the adaptive equivalent fuel consumption minimum strategy (ECMS) to solve the problem, and realize every instant Optimum demand torque distribution. On the basis of ensuring fuel economy, the invention can effectively slow down battery life attenuation, reduce the total cost of automobile use, and realize online real-time optimization.

Description

technical field [0001] The invention belongs to the technical field of hybrid electric vehicle energy management, in particular to a real-time optimization control method for a planetary hybrid electric vehicle considering battery life. Background technique [0002] The increase in automobile production and ownership has greatly increased the burden on energy and the environment, limiting the consumption and emissions of automobiles, and developing new energy vehicles has become a worldwide consensus. Among them, the plug-in hybrid electric vehicle not only has the advantages of low emission and low energy consumption, but also can meet the needs of a longer mileage of the vehicle, and has received more and more attention. [0003] Hybrid electric vehicles are composed of multiple energy sources. How to coordinate the work of multiple energy sources through reasonable energy management and control strategies, and give full play to their respective advantages to achieve optim...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60W20/11
Inventor 曾小华宋美洁杜邵峰王振伟牛超凡马涛
Owner JILIN UNIV
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