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Synergic control method for power allocation of electric vehicle composite power supply

A technology of cooperative control and composite power supply, which is applied in the direction of electric vehicles, battery circuit devices, current collectors, etc., and can solve problems such as difficult multi-objective control and difficult hardware digitalization

Active Publication Date: 2019-04-12
JIANGSU UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these nonlinear control strategies are difficult to achieve multi-objective control, and it is difficult to implement digitally on hardware

Method used

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  • Synergic control method for power allocation of electric vehicle composite power supply
  • Synergic control method for power allocation of electric vehicle composite power supply
  • Synergic control method for power allocation of electric vehicle composite power supply

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Embodiment Construction

[0017] In order to make the content of the present invention clearer and easier to understand, the content of the present invention will be further described below with reference to the accompanying drawings. Of course, the present invention is not limited to this specific embodiment, and general substitutions known to those skilled in the art are also covered within the protection scope of the present invention.

[0018] like figure 1 Shown is a schematic flow chart of an implementation manner of a collaborative control method for power distribution of an electric vehicle composite power supply provided by the present invention. As can be seen from the figure, the collaborative control method includes:

[0019] The S10 processor collects the DC bus voltage in real time;

[0020] The S20 processor formulates a coordinated control strategy according to the real-time acquisition of the DC bus voltage and the DC bus reference voltage, and calculates the reference current of the ...

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Abstract

The invention discloses a synergic control method for power allocation of an electric vehicle composite power supply. The synergic control method comprises the steps of acquiring a DC bus voltage in real time; making a synergic control strategy according to the DC bus voltage acquired in real time and a DC bus reference voltage, and calculating to obtain a reference current of a hysteresis currentcontroller; acquiring a filtering inductance current in a bidirectional boost-buck converter, generating a switch control signal according to the acquired filtering inductor current and the referencecurrent; and generating a pulse signal to control on / off of a first control switch and a second control switch according to the switch control signal so as to achieve synergic control for power allocation of the composite power supply. With a given error band, the filtering inductor current i<L> is controlled to follow the reference current I<r>, a supercapacitor is controlled to charge and discharge, the output DC bus voltage v<0> is maintained constant, the reference current I<r) of a filtering inductor is obtained according to the synergic control strategy, the DC bus voltage v<0> is optimized, the dynamic response of the supercapacitor is improved, and the optimal power balance is maintained between a storage battery and the supercapacitor.

Description

technical field [0001] The invention relates to the technical field of batteries, in particular to a coordinated control method for power distribution of a composite power source of an electric vehicle. Background technique [0002] The rapid development of the automobile industry has driven the development of various technologies of electric vehicles. In the process, the fuel efficiency has been significantly improved, and the emissions have also been significantly reduced. However, electric vehicle technology still faces many challenges. For example, in order to recover as much regenerative braking energy of the vehicle as possible and provide high peak energy on demand during long driving range, long battery operating life and high charge-discharge cycle are required. Rate. During the operation of an electric vehicle, it is critical to predict the battery energy demand for a specific trip. However, random drive cycles and unpredictable power demands require the battery ...

Claims

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Application Information

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IPC IPC(8): H02J7/34
CPCH02J7/345
Inventor 王琪韩晓新诸一琦罗印升
Owner JIANGSU UNIV OF TECH
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