Voltage monitoring instrument of single pile piece of fuel cell

A fuel cell stack and single-chip voltage technology, which is applied in the direction of instruments, measuring electronics, and measuring devices, can solve the problems of not being able to meet the industrial application requirements of stack single-chip voltage monitoring, difficult to withstand voltage, etc., and achieve short measurement periods, Large isolation voltage and good real-time measurement effect

Inactive Publication Date: 2018-05-11
WUHAN MARINE ELECTRIC PROPULSION RES INST CHINA SHIPBUILDING IND CORP NO 712 INST
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Problems solved by technology

However, although the voltage of a single battery is not high, the high-power stack is composed of hundreds of single batteries in series, and the cumulative potential of a single battery to the ground reaches hundreds of volts.
The common-mode voltage of conventional operational amplifiers is generally wit

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  • Voltage monitoring instrument of single pile piece of fuel cell
  • Voltage monitoring instrument of single pile piece of fuel cell
  • Voltage monitoring instrument of single pile piece of fuel cell

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Embodiment Construction

[0038] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, but the present invention is not limited thereby.

[0039] refer to figure 1 , figure 2 As shown, the present invention discloses a fuel cell stack monolithic voltage monitor, the hardware is composed of a signal interface circuit board 1 and a signal processing circuit board 2, and the signal interface circuit board 1 and the signal processing circuit board 2 are connected The pin row and the seat row 3 are connected in-line, and the signal interface circuit board 1 is provided with several electrical interfaces 4 .

[0040] The signal interface circuit board 1 is mainly composed of a power conversion circuit, a signal isolation conversion circuit 12 , an analog channel selection circuit 13 , a decoding circuit 14 and an impedance conversion circuit 15 .

[0041] The power conversion circuit is used to supply power to the monitor, and convert...

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Abstract

The invention discloses a voltage monitoring instrument of a single pile piece of a fuel cell. The voltage monitoring instrument is composed of a signal interface circuit board and a signal processingcircuit board that are in connection by direct plugging between pins and a pin base. The signal interface circuit board consists of a power conversion circuit, a signal isolation conversion circuit,an analog channel selection circuit, a decoding circuit and an impedance conversion circuit. The signal processing circuit board includes a DSP minimum system, an externally expanded RAM circuit, an externally extended AD sampling circuit, a reference voltage circuit, and a CAN communication circuit. According to the invention, with a bipolar signal isolation converter on the signal interface circuit board, one-to-one isolation conversion of the single cell voltages of the pile is carried out. The voltage monitoring instrument has characteristics of large isolation voltage, high measurement accuracy, short measurement period, strong anti-electromagnetic interference capability, wide operating temperature range, long service life, and high reliability and the like; and modularization and miniaturization of the monitoring instrument are realized.

Description

technical field [0001] The invention relates to a fuel cell stack performance and safety monitoring device, more specifically, to a fuel cell stack monolithic voltage monitor. Background technique [0002] A high-power fuel cell stack is usually composed of dozens to hundreds of single cells connected in series. Due to the series structure of single cells in the stack, during the operation of the stack, the most serious failure is the failure of one or several single cells, for example, the gas path of any single cell in the stack is blocked by liquid water , the reaction of the battery will slow down or even stop, and the output voltage will decrease or even reverse. important part. [0003] Therefore, it is necessary to monitor the voltage of each monolithic battery in real time, and transmit the voltage of each monolithic battery to the fuel cell controller, so that the controller can take effective measures according to the abnormal situation of the voltage data to ens...

Claims

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Application Information

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IPC IPC(8): G01R19/25G01R31/36
Inventor 张聪范晶夏丰杰孙震余波
Owner WUHAN MARINE ELECTRIC PROPULSION RES INST CHINA SHIPBUILDING IND CORP NO 712 INST
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