Electric automobile compound energy management method based on rule and nonlinear prediction control

A non-linear prediction, composite energy technology, applied in electric vehicles, vehicle energy storage, control devices, etc.

Active Publication Date: 2019-04-02
NINGBO INST OF TECH ZHEJIANG UNIV ZHEJIANG
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the energy distribution problem of the electric vehicle hybrid power system. This paper proposes a compound energy management method based on rules and nonlinear predictive control. According to the power demand of the vehicle at each moment, the lithium battery and super Capacitor SOC status for energy management

Method used

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  • Electric automobile compound energy management method based on rule and nonlinear prediction control
  • Electric automobile compound energy management method based on rule and nonlinear prediction control
  • Electric automobile compound energy management method based on rule and nonlinear prediction control

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Embodiment

[0149] This method is used on the electric vehicle and bidirectional electric energy conversion research experimental platform to carry out experiments using ECE (Economic Commission of Europe) driving conditions. The structure diagram of the experimental platform is as follows: figure 1 As shown, the entire research and experiment platform is uniformly managed by industrial computer 1, which controls the charger, inverter, battery management system, and bidirectional DC / DC converter through the CAN network, and communicates with the power dynamometer system industrial computer 2 through Ethernet. communication, thus the motor as well as the frequency converter. ECE driving conditions such as figure 2 shown.

[0150]In the composite energy management method, the energy management strategy based on nonlinear predictive control is combined with the rule-based energy management strategy to complete the energy distribution of the hybrid system. When the power required by the c...

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Abstract

The invention discloses an electric automobile compound energy management method based on a rule and nonlinear prediction control. By the adoption of the method, energy management is conducted according to the power requirement of a vehicle at every moment and the SOCs of a lithium battery and a super capacitor. In a nonlinear prediction control strategy, a controller will predict the speed in a certain period in the future, the speed is converted into power through a vehicle running speed and power model, the output current of the lithium battery is optimized with the minimum power consumption as an index through a quadratic programming effective set method, and power distribution of the lithium battery and the super capacitor is finished. By the adoption of the method, on the basis thatthe required power is met, system energy loss can be reduced, use of the lithium battery is reduced, the service life of the lithium battery is prolonged, and the efficiency of a hybrid power system is improved.

Description

technical field [0001] The invention relates to an electric vehicle energy management method based on rules and nonlinear predictive control. Background technique [0002] The current car's high reliance on non-renewable fuels is not in line with the theme of sustainable development of the global environment. In order to solve the problems of air pollution and resource depletion caused by traditional vehicles, the research of electric vehicles has been highly valued by people. For the energy storage system of electric vehicles, lithium batteries are widely used due to their light weight, large energy storage, high power, and no pollution, but using lithium batteries alone may cause the battery pack to overheat and shorten its life. The supercapacitor has the advantages of long life and high instantaneous power, which has a very good auxiliary effect on the battery power system. In addition, supercapacitors operate over a wide temperature range and can completely absorb the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60L58/12B60L58/10B60L50/40
CPCB60L2240/54Y02T10/70
Inventor 陶吉利韩凯马龙华蔡卫明
Owner NINGBO INST OF TECH ZHEJIANG UNIV ZHEJIANG
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