Fuel cell stacking leakage detection equipment

Abstract

The invention relates to fuel cell stacking leakage detection equipment, which mainly comprises a lifting mechanism, a positioning mechanism, a pressure mechanism, an air tightness detection mechanismand the like; the pressure mechanism comprises an equipment rack, and other mechanisms are respectively arranged in the mechanism. The mechanisms are matched with each other to jointly assist in completing the procedures of electric pile stacking and air tightness detection. The pressure mechanism comprises a press base, a pressure sensor, a press outer frame, a pressure motor, a pressure guide column, a press stand column, a pressure rod, a press support, a pressure contact plate and a pressure sensor. The press base is arranged on the horizontal ground, the press outer frame is erected on the press base, the pressure motor is arranged at the top of the press outer frame and controls the pressure rod to stretch out and draw back, the tail end of the pressure rod is connected with the pressure connecting plate, and the pressure is transmitted to the pressure contact plate through the pressure guide column. In order to monitor the pressure of the pressing machine in real time, the pressure sensor and the press stand column are connected to be arranged on a press base platform and connected with the press support.

Description

technical field [0001] The invention relates to fuel cell stack assembly and quality inspection technology, and belongs to the field of fuel cell production, in particular to a fuel cell stack leak detection device. Background technique [0002] A proton exchange membrane fuel cell (PEMFC) is composed of multiple sub-electrodes stacked, including anode and cathode bipolar plates, membrane electrodes, copper electrodes, mounting plates and other components. The stacking process is more time-consuming and time-consuming. After the stack is assembled, it is necessary to carry out air tightness testing on its anode channel, cathode channel and cooling channel to prevent gas collusion between each channel, which will affect product performance and safety. In the prior art, most of the fuel cells first complete the assembly and packaging of the electric stack, and then carry out the air tightness test on the electric stack. During the process of dismantling and reassembling, its ...

AI Technical Summary

Problems solved by technology

In the prior art, most of the fuel cells first complete the assembly and packaging of the electric stack, and then carry out the air tightness test on the electric stack. During the process of dismantling and reassembling, its parts may be damaged, which will increase the cost

In addition, the electric stack is large in size and heavy, and it is not easy to transfer. It is laborious to carry it between different devices manually. At the same time, collisions and severe vibrations will also affect the performance of the electric stack.

[0003] The publication number is CN201921606866.1 utility model patent, which provides a servo-rotating fuel cell stack assembly machine. The positioning rod needs to be disassembled and assembled many times in the process of stacking and leak detection in the test, and must be packaged before proceeding. For air tightness testing, because each part is aligned with the positioning rod by its own gravity, it is impossible to perform leak detection without removing the positioning rod from the provided solution, otherwise the press will interfere with the positioning rod

In addition, the repeated disassembly and assembly of the positioning rod will affect the stacking accuracy, which cannot meet the actual production needs.

[0004] The publication number is CN201922436019.1 utility model patent, which provides a multi-purpose tooling for fuel cell stack assembly and leak detection. This tooling is only suitable for the stack screw packaging method, and is not compatible with the straps and side plates used in the current mainstream trend. Packaging method, if a strap is added, the jig cannot ensure that the materials are stacked neatly only through the positioning holes and positioning columns, and there will be interference with the actual assembly of the press, and there is no sealing element between the jig and the various inlets and outlets of the stack , the airtightness during the test cannot be guaranteed

The three air intake and exhaust channels on both sides share one air cavity, and the airtightness test of a single channel cannot be performed, which does not meet the needs of actual use

[0005] The above two methods are not suitable for mass production, and require repeated disassembly and assembly of positioning fixtures, which are inconvenient for actual use and also affect the production cycle

[0006] In view of the above problems, the technical problem to be solved by the present invention is to provide a fuel cell stack leak detection device to solve the problem of packaging the fuel cell in a state of ensuring its airtightness; The weight is heavy, and it is difficult to take and place on the equipment; solve the problem of unevenness of parts such as fuel stack plates and membrane electrodes when stacking; solve the problems of improving product consistency and production efficiency in mass production of stacks

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