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Energy control method and device for tandem distributed vehicle driving composite energy storage systems

A composite energy storage and energy control technology, used in battery/fuel cell control devices, electric vehicles, vehicle energy storage, etc., can solve the problems of heavy weight, affecting battery life, and large volume

Inactive Publication Date: 2019-08-02
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Limited to the current technical level, power batteries are expensive, bulky, heavy, and low in power density
However, the current off-road vehicles have rigid requirements for the convenience of energy supply and the quickness of power response. When the conventional hybrid system meets the extreme power demand of off-road vehicles, the long-term high-current discharge of the power battery will easily cause the battery to over-discharge and affect the battery. Therefore, the matching of conventional hybrid systems cannot meet the power requirements of off-road vehicles in all road conditions

Method used

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  • Energy control method and device for tandem distributed vehicle driving composite energy storage systems
  • Energy control method and device for tandem distributed vehicle driving composite energy storage systems
  • Energy control method and device for tandem distributed vehicle driving composite energy storage systems

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Embodiment Construction

[0113] figure 1 It shows a flow chart of an energy control method for a series distributed drive vehicle compound energy storage system provided by an embodiment of the present disclosure, and the control method includes the following steps.

[0114] Step 11, calculate the vehicle power requirement P_req.

[0115] The embodiment of the present disclosure does not limit the specific calculation method of the power demand. The vehicle power demand P_req can be calculated by analyzing the opening degree and speed change rate of the electronic pedal (acceleration, braking) through the vehicle controller VCU.

[0116] Step 12, obtain the status information of the APU power generation system, the power battery and the supercapacitor.

[0117] The state information includes super capacitor state of charge SOC_c, voltage U_c, current I_c; power battery state of charge SOC_b, voltage U_c, current I_c; generator output voltage U_g, current I_c.

[0118] The APU power generation system...

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Abstract

The invention relates to an energy control method and device for tandem distributed vehicle driving composite energy storage systems. The energy control method comprises the steps: the vehicle power demand P_req is calculated; state information of an APU power generation system, a power battery and a supercapacitor is obtained; and according to the power demand P_req and the state information, vehicle power flows are distributed, and the efficiency of the APU power generation system, the supercapacitor and the power battery is balanced. The vehicle endurance mileage is extended, the vehicle power response speed is increased, meanwhile fuel economy is improved, and the service life of a storage battery is prolonged.

Description

technical field [0001] The invention belongs to the technical field of new energy vehicles, and in particular relates to an energy control method and device for a composite energy storage system of a series distributed driving vehicle. Background technique [0002] New energy vehicles generally use pure electric power, or a combination of a smaller engine and generator, equipped with a larger power battery. Limited to the current technical level, power batteries are expensive, bulky, heavy, and low in power density. However, the current off-road vehicles have rigid requirements for the convenience of energy supply and the quickness of power response. When the conventional hybrid system meets the extreme power demand of off-road vehicles, the long-term high-current discharge of the power battery will easily cause the battery to over-discharge and affect the battery. Therefore, the matching of the conventional hybrid power system cannot meet the power requirements of off-road...

Claims

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Application Information

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IPC IPC(8): B60L58/12B60L50/61B60L50/40B60L7/10B60L50/60
CPCB60L58/12B60L50/61B60L50/40B60L7/10B60L50/60Y02T10/62Y02T10/70
Inventor 秦训鹏周岩刘信凡
Owner WUHAN UNIV OF TECH
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