Device for monitoring operating voltage of each cell in fuel cells and making safety alarming as well as its method

A technology of safety alarm device and working voltage, applied in the direction of measurement device, measurement of electricity, measurement of electric variables, etc., can solve the problem of increasing the complexity of fuel cell power generation system, very high requirements for circuit board withstand voltage, and difficulty in circuit board design and production, etc. problems, to achieve the effect of reliable measurement value, low withstand voltage requirements, and simple measurement and monitoring

Inactive Publication Date: 2004-03-10
SHANGHAI MUNICIPAL ELECTRIC POWER CO +2
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  • Abstract
  • Description
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AI Technical Summary

Problems solved by technology

However, there are some shortcomings in this monitoring and measurement technology: 1. When the number of fuel cell cells is large, the voltage difference between the first measurement line and the last measurement line is very large, which affects signal processing and digital conversion. The circuit board withstand voltage requirements are very high, which increases the difficulty of circuit board design and production; and the differential amplification method also affects the measurement accuracy
2. This technology is composed of many circuit boards, which is bulky and complicated in wiring, which increases the complexity of the fuel cell power generation system

Method used

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  • Device for monitoring operating voltage of each cell in fuel cells and making safety alarming as well as its method
  • Device for monitoring operating voltage of each cell in fuel cells and making safety alarming as well as its method
  • Device for monitoring operating voltage of each cell in fuel cells and making safety alarming as well as its method

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Embodiment Construction

[0013] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0014] Such as figure 2 As shown in the schematic diagram, the fuel cell operating voltage monitoring and safety alarm device of the present invention includes: a single-chip microcomputer 1 , an A / D converter 2 , and several switching devices 3 . The switch device 3 may be a plurality of photoelectric isolation relays (S1, S2...), and is connected to a plurality of single cells (fc1, fc2...) of the fuel cell stack 4 under test in a one-to-one correspondence. The output signal circuit controls the conduction or closure of the corresponding photoelectric isolation relay 3, and the A / D converter 2 is connected to the output terminal of each single battery to collect and detect the output voltage of the corresponding single battery, and transmit the collected value to Microcontroller1. When S1S2 is closed, the A / D converter 2 collects the sig...

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Abstract

The device includes several batteries to be monitored, single chip unit, an A/D convertor and some switch units. The output signal of the single chip unit controls on/off of corresponding switch unit in cycle, and controls on/off of single battery circuit further. Data of output voltage of corresponding single battery collected by the A/D convertor are sent to the single chip unit. Advantages of the invention are: simple measuring and monitoring method, reliable measured data and low requirement of withstand voltage for signal processing and digital conversion circuit board.

Description

technical field [0001] The invention relates to a device and a method for monitoring and safety alarming of single-cell working voltage of a proton exchange membrane fuel cell. Background technique [0002] A proton exchange membrane fuel cell stack is generally composed of several single cells connected in series or in parallel, which is particularly important for the fuel cell operating voltage, especially the monitoring and automatic control of the operating voltage of all single cells and safety alarms. Because any abnormal situation of the entire fuel cell power generation system, such as overcurrent, exceeding the normal operating temperature, etc., will show that the operating voltage of some single cells is in an abnormal state. Especially when electrode breakdown occurs, the output voltage of the single cell where the electrode is located will reach an abnormal value, such as close to zero, or even a negative value, while the output voltage of other normal single ce...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/36
Inventor 傅明竹胡里清
Owner SHANGHAI MUNICIPAL ELECTRIC POWER CO
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