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Cooperative control method for power distribution of electric vehicle composite power supply

A collaborative control and composite power supply technology, applied in electric vehicles, battery circuit devices, current collectors, etc., can solve problems such as difficult hardware digitalization and difficult multi-target control

Active Publication Date: 2020-07-28
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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  • Cooperative control method for power distribution of electric vehicle composite power supply
  • Cooperative control method for power distribution of electric vehicle composite power supply
  • Cooperative control method for power distribution 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 in conjunction with the accompanying drawings. Of course, the present invention is not limited to this specific embodiment, and general replacements known to those skilled in the art are also covered within the protection scope of the present invention.

[0018] Such as figure 1 Shown is a schematic flow chart of an embodiment of the cooperative control method for electric vehicle composite power supply power distribution provided by the present invention. It can be seen from the figure that the cooperative control method includes:

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

[0020] The S20 processor formulates a cooperative control strategy based on the real-time collected DC bus voltage and DC bus reference voltage, and calculates the reference current of the hysteresis current controlle...

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Abstract

The invention discloses a cooperative control method for power distribution of a composite power supply of an electric vehicle, comprising: collecting DC bus voltage in real time; formulating a cooperative control strategy according to the real-time collected DC bus voltage and DC bus reference voltage, and calculating a hysteresis current controller The reference current; collect the filter inductor current in the bidirectional buck-boost converter in real time, and generate a switch control signal according to the collected filter inductor current and reference current; generate a pulse signal according to the switch control signal to control the first control switch and the second control switch. On and off, to realize the coordinated control of the power distribution of the composite power supply. Within a given error band, control the filter inductor current i L follow the reference current I r , control the charging and discharging of the supercapacitor, and maintain the output DC bus voltage v 0 constant; the reference current I of the filter inductor is obtained according to the cooperative control strategy r , to optimize the DC bus voltage v 0 , which improves the dynamic response of the supercapacitor and maintains an optimal power balance between the battery and the supercapacitor.

Description

technical field [0001] The invention relates to the technical field of batteries, in particular to a method for cooperative control of electric vehicle compound power supply power distribution. Background technique [0002] The rapid development of the automobile industry has led to the development of various technologies for electric vehicles. In the process, the fuel utilization rate has been significantly improved, and 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 life and high charge and discharge cycles are required Rate. During the operation of electric vehicles, it is critical to predict the battery energy demand for a specific trip. However, random drive cycles and unpredictable power demands require batteries to be charged an...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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