Connecting method of inspecting lines of metal bipolar plate fuel cell stack

Abstract

The invention discloses a connecting method of inspecting lines of a metal bipolar plate fuel cell stack. The method includes the following steps that metal bipolar plates with inspection jacks are formed through sheet metal stamping, and the metal bipolar plates are used for assembling the fuel cell stack; the distance between adjacent inspection jacks is calculated according to the thicknesses of the metal bipolar plates; a flat cable connector is formed through press fit according to the distance between the adjacent inspection jacks, and pins of the flat cable connector are matched with the inspection jackets; the pins of the flat cable connector are inserted into the inspection jacks of the metal bipolar plates of the fuel cell stack; and flat cables of the flat cable connector are connected with a cell inspection system. According to the connecting method of the inspecting lines of the metal bipolar plate fuel cell stack, the connection mode is safe and reliable, the monitoring is accurate, and the cell stack can be conveniently and rapidly detached; and work efficiencies of voltage monitoring of a fuel cell are improved, and the problem brought by welding leads which are connected with the inspection system on the metal bipolar plates by means of traditional connecting methods of inspecting lines of metal bipolar plate fuel cell stacks is solved.

Description

technical field [0001] The invention relates to a method for connecting metal bipolar plate fuel cell stack inspection lines. Background technique [0002] A fuel cell is a power generation device that converts the chemical energy stored in fuel and oxidant into electrical energy through an electrochemical reaction. The battery inspection system is a device used to monitor the battery voltage and ensure the normal operation of the battery. Usually, the fuel cell passes The bipolar plate combines multiple single cells in series to form a fuel cell stack as its application form. Metal bipolar plates are widely used in fuel cell stacks due to their high strength, excellent electrical and thermal conductivity, and good gas barrier properties. , the battery stack voltage is obtained by accumulating the voltage of multiple single cells, then accurate monitoring of the voltage of each single cell of the battery stack is the premise to ensure the safe and reliable operation of the o...

AI Technical Summary

Problems solved by technology

[0002] A fuel cell is a power generation device that converts the chemical energy stored in fuel and oxidant into electrical energy through an electrochemical reaction. The battery inspection system is a device used to monitor the battery voltage and ensure the normal operation of the battery. Usually, the fuel cell passes The bipolar plate combines multiple single cells in series to form a fuel cell stack as its application form. Metal bipolar plates are widely used in fuel cell stacks due to their high strength, excellent electrical and thermal conductivity, and good gas barrier properties. , the battery stack voltage is obtained by accumulating the voltage of multiple single cells, then accurate monitoring of the voltage of each single cell of the battery stack is the premise to ensure the safe and reliable operation of the overall battery stack, and the battery inspection system The effective connection with each single cell of the fuel cell stack plays a key role. In the prior art, the single fuel cell and battery inspection system mainly welds the lead wires connected to the inspection interface on the metal bipolar plate. Connecting, this connection method has the following problems: using welding, because the thickness of the metal bipolar plate is very small, the distance between each metal bipolar plate is also very small, then the improper size of the solder joint at the welding site will cause metal The bipolar plates are short-circuited with each other and damage the fuel cell; due to the defects of the welding process itself, the solder joints are prone to fall off, and after the metal bipolar plates with a small distance from each other are connected to form a battery stack, it will be difficult for welding tools to enter. Re-welding is not only very difficult, but also easily damages other components in the fuel cell stack; in addition, when the fuel cell stack needs to be disassembled again, it is necessary to open the welding part, which is not only labor-intensive and time-consuming, but also easily causes damage to the components

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