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Power distribution method for composite power supply system of electric vehicle

A technology of electric vehicle and composite power supply, which is applied in the field of composite power supply system of electric vehicles, to achieve the effect of reducing charging and discharging current and optimal distribution effect

Active Publication Date: 2020-11-13
HANGZHOU DIANZI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention aims at the deficiencies of the existing electric vehicle composite power supply system power distribution control method, and proposes an electric vehicle composite power supply system power distribution method

Method used

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  • Power distribution method for composite power supply system of electric vehicle
  • Power distribution method for composite power supply system of electric vehicle

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Embodiment Construction

[0018] Now in conjunction with accompanying drawing, the patent of the present invention is described in detail as follows:

[0019] as attached figure 1 As shown, the present invention provides a layered fuzzy control method for a composite power supply system of an electric vehicle. Specifically, the method includes a supercapacitor, a storage battery, a bidirectional DC / DC converter, an energy management fuzzy controller and a drive system. The implementation steps are as follows:

[0020] Step 1: Collect relevant data inside the car

[0021] as attached figure 1 As shown, the state of charge of the battery inside the car and the state of charge of the supercapacitor as well as the current of the battery during the operation of the electric car and the required power of the load connected to the drive system are obtained during the operation of the electric vehicle.

[0022] According to the battery current of the electric vehicle running, the battery current target diff...

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Abstract

The invention discloses a power distribution method for a composite power supply system of an electric vehicle. Defects of a single fuzzy controller are overcome. A second-layer fuzzy controller takesa storage battery current target difference value delta Ibat and a storage battery output power initial distribution coefficient alpha 0 as input quantities; the storage battery output power initialdistribution coefficient of a first-layer fuzzy controller can be corrected in real time according to different driving working conditions of the electric vehicle, so that the optimal distribution effect of power between the storage battery and the super capacitor is achieved, and the charging and discharging current of the storage battery is reduced.

Description

technical field [0001] The invention belongs to the field of composite power supply systems of electric vehicles, and in particular relates to a power distribution method of the composite power supply system of electric vehicles. Background technique [0002] In recent years, with the rapid development of the automobile industry and the continuous growth of the global motor vehicle population, environmental issues and energy issues have become the focus of global attention. Electric vehicles are a major development trend in today's automotive industry. In pure electric vehicles, many scholars at home and abroad have proposed a solution to combine batteries and supercapacitors in parallel to form a composite power supply, giving full play to the advantages of high power density of supercapacitors and high energy density of batteries, thereby improving the overall performance of vehicle energy sources. At present, the battery-supercapacitor electric vehicle composite power sy...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60L58/12B60L50/40B60L50/60
CPCB60L58/12B60L50/40B60L50/60Y02T10/70
Inventor 刘栋良杨响攀崔丽丽
Owner HANGZHOU DIANZI UNIV
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