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A fuel cell hybrid power system, power supply unit and charging control method

A technology of hybrid power system and charging control method, which is applied in the field of power supply unit and charging control, fuel cell hybrid power system, can solve the problems of shortened life of fuel cells, etc., and achieve simple and reliable energy management strategy of the whole vehicle, extended life, and guaranteed use The effect of longevity

Active Publication Date: 2021-03-02
ZHENGZHOU YUTONG BUS CO LTD
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Problems solved by technology

[0009] The purpose of the present invention is to provide a fuel cell hybrid power system, a power supply unit and a charging control method to solve the problem in the prior art that the fuel cell life is shortened when the power of the fuel cell needs to follow the change of the power of the vehicle

Method used

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  • A fuel cell hybrid power system, power supply unit and charging control method
  • A fuel cell hybrid power system, power supply unit and charging control method
  • A fuel cell hybrid power system, power supply unit and charging control method

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Embodiment Construction

[0049] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0050] The method of the present invention is now applied as Figure 1-2 Shown is an indirect fuel cell hybrid system.

[0051]The auxiliary power unit includes a power battery pack and a supercapacitor pack. The fuel cell is connected to a step-up DC / DC converter through the power main wiring, the output end of the step-up DC / DC converter is connected to the anode of a diode, the cathode of the diode is connected to the motor inverter, and the output end of the motor inverter is connected to motor. A power battery pack is parallelly connected to the power main line between the step-up DC / DC converter and the diode. A supercapacitor group is parallelly connected to the power main line between the diode cathode and the motor inverter.

[0052] T...

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Abstract

The invention relates to a fuel cell hybrid power system, a power supply unit and a charging control method. The method first detects the state of charge value of the power battery, and then judges whether it is greater than the set state of charge value: if it is greater than the set state of charge value, Then control the DC / DC between the fuel cell and the power battery so that the fuel cell does not charge the power battery; otherwise, control the DC / DC between the fuel cell and the power battery so that the fuel cell charges the power battery with a constant current in stages; The stages are divided according to the state of charge value of the power battery, and the charging current of each stage is different, and the charging current of the stage with a small state of charge value of the power battery is greater than that of the stage with a large state of charge value of the power battery. The control method of the present invention is simple, reliable and effective, so that the fuel cell does not need to follow the power change of the vehicle, thereby prolonging the service life of the fuel cell and ensuring the service life of the power battery, and at the same time, making the energy management strategy of the vehicle simple and reliable.

Description

technical field [0001] The invention belongs to the technical field of fuel cell vehicles, and in particular relates to a fuel cell hybrid power system, a power supply unit and a charging control method. Background technique [0002] In recent years, the problem of environmental pollution has become increasingly serious. In order to cope with the global energy shortage and environmental pollution and other issues, the vigorous development of energy-based vehicles has been advocated, and more and more people have turned their attention to zero-emission fuel cell vehicles. [0003] The power system of fuel cell vehicles is the main symbol that distinguishes fuel cell vehicles from other types of vehicles (including internal combustion engine vehicles, battery electric vehicles and oil-electric hybrid vehicles). Under normal circumstances, the dynamic characteristics of the fuel cell are difficult to meet the frequent changes in vehicle load, so the fuel cell is not the only p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60L58/24
CPCB60L58/40Y02T10/72Y02T10/70
Inventor 位跃辉苏常军王辉程晓龙陈炳酉
Owner ZHENGZHOU YUTONG BUS CO LTD
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