Hydrogen pressure control system and method for fuel battery backup power supply system

A backup power supply and pressure control technology, applied in the field of control systems, can solve problems such as negative pressure in hydrogen pipelines, wrong fault information, etc.

Active Publication Date: 2014-09-24
KUSN FUERSAI ENERGY
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Problems solved by technology

[0002] In the existing fuel cell backup power system, hydrogen pressure control is indispensable. In the existing fuel cell backup power system, generally only the hydrogen pressure of the control system can be kept within the normal range when the system is running. The diffusion of hydrogen molecules will cause negative pressure in the hydrogen pipeline, the output signal of the pressure sensor will be lower than the zero point signal, and the system will mistakenly believe that the zero point drift of the hydrogen into the pressure sensor (assuming that the zero point signal is 0.5V, set when the output signal is lower than When it is 0.4V, it is judged as the sensor zero drift), and a wrong fault message is generated

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  • Hydrogen pressure control system and method for fuel battery backup power supply system

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Embodiment Construction

[0014] In order to make the technical means, creative features, goals and effects achieved by the present invention easy to understand, the present invention will be further described below in conjunction with specific embodiments.

[0015] Such as figure 1 As shown, a hydrogen pressure control system for a fuel cell backup power supply system of this embodiment includes a hydrogen master valve 1, a hydrogen inlet valve 3 and a hydrogen exhaust valve 5, a hydrogen master valve 1, a hydrogen inlet valve 3 and The hydrogen exhaust valve 5 is connected sequentially through pipelines, and a hydrogen inlet pressure sensor 2 for measuring the pipeline hydrogen pressure is also arranged on the pipeline between the hydrogen main valve 1 and the hydrogen inlet valve 3. The pipeline between the valve 3 and the hydrogen exhaust valve 5 is also connected with an electric stack 4; the hydrogen inlet pressure sensor 2 is also connected with a single-chip microcomputer for cyclically detecti...

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Abstract

The invention relates to a hydrogen pressure control system and a method for a fuel battery backup power supply system. The hydrogen pressure control system comprises a main hydrogen valve, a hydrogen feeding valve and a hydrogen exhaust valve, wherein the main hydrogen valve, the hydrogen feeding valve and the hydrogen exhaust valve are connected in sequence through pipelines; a hydrogen feeding pressure sensor is also arranged on the pipeline between the main hydrogen valve and the hydrogen feeding valve; an electric pile is also connected to the pipeline between the hydrogen feeding valve and the hydrogen exhaust valve; the hydrogen feeding pressure sensor is also connected with a single-chip microcomputer for cyclically detecting a hydrogen feeding pressure output signal; the main hydrogen valve, the hydrogen feeding valve and the hydrogen exhaust valve are connected with the single-chip microcomputer and are controlled to be switched on and switched off through the single-chip microcomputer. When the output signal of the hydrogen feeding pressure sensor is lower than a set value, the hydrogen pressure control system effectively eliminates interference caused by a negative pressure phenomenon of a hydrogen pipeline, and can accurately judge whether the hydrogen feeding pressure sensor has a zero-point drifting problem and effectively avoid the phenomenon that the system reports a failure of the hydrogen feeding pressure sensor by mistake, so that the diagnosis accuracy of the system is improved, and the reliability of the system during standby is guaranteed.

Description

technical field [0001] The invention relates to a control system, more specifically, a gas pressure control system and method related to a fuel cell backup power supply system. Background technique [0002] In the existing fuel cell backup power system, hydrogen pressure control is indispensable. In the existing fuel cell backup power system, generally only the hydrogen pressure of the control system can be kept within the normal range when the system is running. The diffusion of hydrogen molecules will cause negative pressure in the hydrogen pipeline, the output signal of the pressure sensor will be lower than the zero point signal, and the system will mistakenly believe that the zero point drift of the hydrogen into the pressure sensor (assuming that the zero point signal is 0.5V, set when the output signal is lower than When it is 0.4V, it is judged as the sensor zero drift), and a wrong fault message is generated. Contents of the invention [0003] Aiming at the defic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/04H01M8/04298
CPCY02E60/50H01M8/04753Y02P70/50
Inventor 顾荣鑫马天才李胜
Owner KUSN FUERSAI ENERGY
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