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A method for judging the flow rate of hydrogen entering a fuel cell

A fuel cell and hydrogen technology, applied in the direction of fuel cell, battery/fuel cell control device, battery/battery traction, etc., can solve the problems of poor control accuracy and fluctuation of fuel cell output power, and achieve the effect of improving maintainability

Active Publication Date: 2021-05-14
中极氢能汽车(长治)有限公司
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  • Description
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  • Application Information

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Problems solved by technology

The electronically controlled proportional valve in the fuel cell hydrogen supply system controls the hydrogen flow into the fuel cell. If the control accuracy of the hydrogen flow is poor, the output power of the fuel cell will fluctuate.

Method used

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  • A method for judging the flow rate of hydrogen entering a fuel cell
  • A method for judging the flow rate of hydrogen entering a fuel cell
  • A method for judging the flow rate of hydrogen entering a fuel cell

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Embodiment Construction

[0030] In order to make the purpose, technical solution and advantages of the present invention clearer, the embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0031] Fuel cell hydrogen supply system such as figure 1 As shown, wherein, the fuel cell hydrogen supply system includes a hydrogen bottle, a bottle valve (the bottle valve here is the bottle valve that comes with the hydrogen bottle, and is controlled by the FCU control system), a pressure reducing valve, a check valve, and an electronically controlled proportional valve. Valve, fuel cell anode flow channel, hydrogen circulation pump, heat exchanger, three-way solenoid valve. High-pressure hydrogen gas (up to 70MPa) is in the pipeline passing through the hydrogen cylinder and bottle valve to the pressure reducing valve, and medium-pressure hydrogen gas is in the pipeline passing through the pressure reducing valve, check valve and electronically contro...

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Abstract

A method for judging the flow rate of hydrogen gas entering a fuel cell, which mainly includes the following steps: S1, using the VCU control system to send a command to start the fuel cell to the FCU control system; S2, the system detects whether the medium pressure value in the fuel cell hydrogen supply system is between within the pressure range of the hydrogen cylinder; S3. If the medium pressure value is not within the pressure range of the hydrogen cylinder, the FCU control system will broadcast a fault code, and the fuel cell start command will stop; if the medium pressure in the hydrogen supply system of the fuel cell The pressure value is within the pressure range of the hydrogen cylinder in S2, calculate the required hydrogen flow and the actual hydrogen flow into the fuel cell; S4, calculate the absolute value of the difference between the required hydrogen flow and the actual hydrogen flow obtained in S3, and compare Calibrate the threshold to judge whether the actual hydrogen flow into the fuel cell meets the requirements.

Description

technical field [0001] The invention relates to the field of fuel cell vehicles, in particular to a method for judging the flow of hydrogen gas entering a fuel cell. Background technique [0002] A hydrogen fuel cell system requires a precise match between the oxygen content in the cathode and the hydrogen in the anode. When the required power of a fuel cell vehicle changes with the external environment, the air-fuel ratio required by the fuel cell in the fuel cell hydrogen supply system will also change accordingly. The electronically controlled proportional valve in the fuel cell hydrogen supply system controls the hydrogen flow into the fuel cell. If the control accuracy of the hydrogen flow is poor, the output power of the fuel cell will fluctuate. Therefore, it is particularly important to judge the accuracy of the hydrogen flow rate entering the fuel cell hydrogen supply system. Contents of the invention [0003] In view of this, the present invention provides a me...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60L50/70B60L58/30H01M8/0438
CPCB60L50/70B60L58/30H01M8/0438Y02E60/50Y02T90/40
Inventor 张雅郝义国
Owner 中极氢能汽车(长治)有限公司
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