Multi-flow-field test fixture for fuel cell

Abstract

The invention discloses a multi-flow-field test fixture for a fuel cell and belongs to the technical field of cell testing. The multi-flow-field test fixture comprises a cathode plate and an anode plate; two grooves are formed in the opposite side surfaces of the cathode plate and the anode plate respectively; one end surface of each groove is provided with a power source interface; two vent holesare formed in the two opposite side surfaces of each groove; a plurality of through holes are correspondingly formed in the upper surfaces of the cathode plate and the anode plate; a fixing bolt is mounted in each through hole; and the cathode plate and the anode plate are fixed by the fixing bolts through nuts. According to the multi-flow-field test fixture for the fuel cell of the invention, anend plate, a collector plate and a bipolar plate are integrated, so that the cathode plate and the anode plate can be formed; the test grooves and the vent holes are directly formed in the cathode plate and the anode plate, and the power source interfaces are directly arranged on the cathode plate and the anode plate; the cathode plate and the anode plate are fixed through the bolts; the disassembly and assembly of the multi-flow-field test fixture are convenient; the resistance values of the cathode plate and the anode plate are small, so that errors caused by testing the performance of a battery through a groove clamp during use can be reduced; and the multi-flow-field test fixture can be arranged in different types of flow fields so as to test the influence of the performance of the flow fields on the performance of fuel cells.

Description

technical field [0001] The invention belongs to the technical field of battery testing, in particular to a multi-flow field testing fixture for fuel cells. Background technique [0002] Because proton exchange membrane fuel cells are not limited by the Carnot cycle, the energy conversion efficiency is high; the product produced is only water, and there is no emission to the environment; the structure is simple; the operation is convenient; and it can be quickly started at low temperature, etc. preferred energy source. Today, when energy resources are scarce and environmental problems are frequent, proton exchange membrane fuel cells, which are environmentally friendly new energy sources, have attracted the attention of many researchers. [0003] Among them, the test of the flow field of the proton exchange membrane fuel cell is particularly important. At present, the proton exchange membrane fuel cells are mainly straight channel and serpentine. In order to make the reacta...

AI Technical Summary

Problems solved by technology

Traditional battery performance test fixtures and test methods have roughly similar structures, mainly composed of bipolar plates, flow fields, and membrane electrodes. In the process of installing porous flow fields, the porous flow fields need to be placed in the middle groove of the fixture , be careful to avoid squeezing the metal foam. When the pore size is small, the mechanical properties of the metal foam are small, which will easily cause the flow field of the metal foam to be squeezed, affect the gas transmission, and increase the error of the test results; the disassembly and assembly are complicated. In addition, due to The superposition of multi-layer materials leads to an increase in the contact area, and also increases the contact resistance of the test fixture, which increases the error of the test results

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