Device and method for testing single-channel fluid of bipolar plate flow field for fuel cell
A fuel cell and testing device technology, applied in fuel cells, fuel cell additives, fuel cell control, etc., can solve the problems of not testing the law of the initial movement of the liquid, unable to accurately control the amount of injected liquid, etc., to achieve convenient observation, The effect of easy experimental results and simple operation methods
Active Publication Date: 2012-10-03
SUNRISE POWER CO LTD
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Problems solved by technology
The disadvantage of this method is that the amount of liquid injected cannot be precisely controlled, and the law of the initial movement of the liquid is not tested.
Method used
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[0025] Taking an actual measurement as an example, the present invention will be further described.
[0026] The cover plate 7 is a transparent plexiglass flat plate, and the cover plate 7 is provided with an air inlet 3 and three droplet injection holes 4; the aperture of the air inlet is 1mm, and the aperture of the droplet injection hole is 0.8mm. , the base plate 6 is provided with an air outlet 9, the inlet pressure gauge 2 and the outlet pressure gauge are both precision pressure gauges, and the stainless steel plate 5 is provided with a single flow field flow channel, the groove depth of the single flow field flow channel is 0.4mm, and the groove depth is 0.4 mm. The width is 0.54mm. The stainless steel plate 5 with a single flow field channel is sandwiched between the transparent cover plate 7 and the bottom plate 6 and fixed with fastening bolts 8 . The syringe 12 is fixed on the bracket 11 after being filled with deionized water. The micro-injection controller 12 c...
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Abstract
The invention relates to a device and method for testing a single-channel fluid of a bipolar plate flow field for a fuel cell, wherein a single flow channel for the flow filed is arranged on a stainless steel plate which is clamped between a transparent cover plate and a bottom plate and hermetically fastened; the cover plate is provided with an air inlet hole and a liquid droplet injection hole;the bottom plate is provided with an air outlet; the air inlet hole is communicated with the front end of the flow channel; the liquid droplet injection hole is communicated with the intermediate portion of the flow channel; the air outlet is communicated with the rear end of the flow channel; an injection head for an injector is connected with the liquid droplet injection hole in the cover plate; a pipeline where the air inlet hole and an air outlet hole are connected is connected with a pressure gauge and an inlet valve; and a control system controls the liquid droplet injection of the injector. The testing method comprises the following steps of: adjusting the inlet pressure; controlling the injection rate of liquid droplets through a trace injection pump control system; observing the motion state of the liquid droplets in the channel; and recording the pressure of an air inlet for the cover plate and the pressure of the air outlet for the bottom plate under different motion states. By the adoption of the method, the injection of the liquid droplets into the flow channel can be conveniently and accurately controlled; the motion state of the liquid droplets can be observed in real time; and the properties of the fluid can be tested in real time.
Description
technical field [0001] The invention relates to the field of fuel cell test methods, in particular to the fuel cell bipolar plate flow field test technology. Background technique [0002] The flow field is the processing of grooves of various shapes on the bipolar plate to provide passages for reactants and reaction products. It is the key to the fuel cell. The flow field structure must be designed according to the law of fluid motion. During the working process of the proton exchange membrane fuel cell, there will be liquid water, which mainly comes from the water produced in the reaction process and the humidified water brought in by the gas. If the liquid water cannot be discharged in time, liquid droplets will accumulate inside the flow field channel, or a layer of water film will be formed on the surface of the channel, which will greatly reduce the channel size, increase the pressure difference of the gas passing through the channel, and seriously affect the performanc...
Claims
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IPC IPC(8): H01M8/04H01M8/04298H01M8/04313H01M8/0438
CPCY02E60/50
Inventor 付宇王红梅窦永香徐洪峰侯中军明平文
Owner SUNRISE POWER CO LTD