Extended-range electric vehicle energy distribution method based on dual-voltage composite energy storage system

A technology of energy distribution and composite energy storage, which is applied in the direction of electric vehicles, control drives, vehicle components, etc., can solve problems such as battery damage and impact on battery life, and achieve the goals of increasing service life, improving energy transfer efficiency, and reducing fuel consumption. Effect

Inactive Publication Date: 2012-06-20
HUNAN CSR TIMES ELECTRIC VEHICLE
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AI Technical Summary

Problems solved by technology

[0007] Existing range-extended electric vehicles use a relatively simple structure of the energy storage system. When the battery is fully charged, since the vehicle is in pure electric mode and the battery is the only energy source for the power system, the vehicle is in the process of driving or braking. It may cause the battery to be in the state of high current charging and discharging for a long time, which will cause great damage to the battery and affect the life of the battery

Method used

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  • Extended-range electric vehicle energy distribution method based on dual-voltage composite energy storage system
  • Extended-range electric vehicle energy distribution method based on dual-voltage composite energy storage system
  • Extended-range electric vehicle energy distribution method based on dual-voltage composite energy storage system

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Embodiment Construction

[0021] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0022] The energy distribution method of extended-range electric vehicles based on the dual-voltage composite energy storage system, a diode is set between the battery and the supercapacitor, and the conduction direction of the diode makes the energy only flow from the battery to the supercapacitor. Running state, APU system running state, battery voltage and supercapacitor voltage, control the energy flow of the engine, APU system, battery and supercapacitor, and determine the energy distribution of the whole vehicle.

[0023] Such as figure 1 As shown, the vehicle is running in the driving state, and it is detected that the voltage of the supercapacitor is higher than the voltage of the battery, then the supercapacitor provides all the energy required by the power system, the vehicle runs in pure electric mode, and the APU system is in idle o...

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Abstract

The invention discloses an extended-range electric vehicle energy distribution method based on a dual-voltage composite energy storage system. A diode is arranged between a storage battery and a super capacitor; the conduction direction of the diode enables that energy only can flow from the storage battery to the super capacitor; and by detecting the operation state of the whole vehicle, the operation state of an engine, the operation state of an APU (auxiliary power unit) system, the voltage of the storage battery and the voltage of the super capacitor, the energy flow of the engine, the APU system, the storage battery and the super capacitor is controlled, and the energy distribution of the whole vehicle is determined.

Description

technical field [0001] The present invention relates to an electric vehicle, especially a range-extended electric vehicle based on a dual-voltage composite energy storage system, and more particularly, an energy distribution method for an extended-range electric vehicle based on a dual-voltage composite energy storage system. Background technique [0002] Pure electric vehicles have outstanding advantages such as energy saving, low noise, and zero emissions, and are one of the important directions for the development of electric vehicles. However, due to the limitations of charging station construction at the current stage, pure electric vehicles are restricted by the driving range, and it is difficult to gain market recognition. . The state encourages the development of hybrid electric vehicles, and range-extended electric vehicles are an important direction for hybrid electric vehicles. The range-extended electric vehicle is a special pure electric vehicle, which uses the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60L15/00B60L7/10
Inventor 王文明刘凌张斌斌蒋时军王坤俊裴海灵李晟刘文洲
Owner HUNAN CSR TIMES ELECTRIC VEHICLE
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