A visualization device for assessing the water drainage capacity of bipolar plates

Abstract

The application discloses a kind of visual devices for evaluating bipolar plate drainage capacity, it is related to fuel cell technology field;In order to be able to intuitively evaluate the influence of flow field shape on drainage effect;The device specifically includes bottom plate, the outer wall of one side of the bottom plate is fixed with transparent plate by bolt, and the outer wall of one side of bottom plate and transparent plate is respectively opened gas guide through-hole and water guide through-hole, and the inner wall of gas guide through-hole and water guide through-hole is respectively inserted with gas guide joint and water supply joint, the outer wall of gas guide joint is provided with gas circulation mechanism, the outer wall of water supply joint is provided with water circulation mechanism, the outer wall of one side of bottom plate is provided with bipolar plate flow channel, and the outer wall of one side of transparent plate is opened with clamping groove.The water is sprayed into water tank by water circulation mechanism, then the surface of porous plate is observed through transparent plate, the gas circulation mechanism is opened when there is bubble generation, and the drainage effect of liquid water of bipolar plate flow channel is observed through transparent plate after the flow in the gas circulation mechanism is stable.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of fuel cells, in particular to a visual device for evaluating water drainage capacity of bipolar plates. BACKGROUND

[0002] Fuel cells are a key technology for carbon neutralization and carbon peak, and play an important role in clean energy and environmental protection. At present, fuel cell technology has met the technical conditions for commercial application, but still needs to solve the problems of performance, durability and cost. The core technology of water and heat management of fuel cell stack is a key factor affecting the cost and life of fuel cells, and how to effectively detect and characterize the transfer of water inside the fuel cell is an important step to improve water management.

[0003] For the core component of fuel cell stack, the bipolar plate is a key component that affects the internal water management of the stack, and the design of the flow field shape plays an important role in the smooth drainage of liquid water. At present, the research on the drainage effect of the flow field mainly focuses on simulation technology, and there are few experimental studies. Direct online detection on the fuel cell can be closest to the actual situation, and generally adopts neutron imaging technology, but its equipment is complex and the cost is high, which is difficult to play a role in rapid iterative development. It is difficult to simulate the water generation process of the membrane electrode by using other offline characterization methods. The present application adopts a porous plate with a characteristic aperture, and adjusts the pressure difference on both sides to control the permeation speed of liquid water, which is similar to the generation of liquid water by the membrane electrode. Therefore, the present application develops a simple and easy-to-use test device that can intuitively evaluate the influence of the flow field shape on the drainage effect. SUMMARY

[0004] The purpose of the present application is to solve the problems existing in the prior art and provide a visual device for evaluating water drainage capacity of bipolar plates.

[0005] In order to achieve the above purpose, the present application adopts the following technical scheme:

[0006] A visual device for evaluating water drainage capacity of bipolar plates, comprising a bottom plate, a transparent plate is fixed on one side of the outer wall of the bottom plate through bolts, a gas guide through hole and a water guide through hole are opened on one side of the outer wall of the bottom plate and the transparent plate respectively, a gas guide connector and a water guide connector are inserted into the inner walls of the gas guide through hole and the water guide through hole respectively, a gas circulation mechanism is arranged on the outer wall of the gas guide connector, a water circulation mechanism is arranged on the outer wall of the water guide connector, a bipolar plate flow channel is arranged on one side of the outer wall of the bottom plate, a clamping groove is opened on one side of the inner wall of the clamping groove, a water inlet groove is opened on one side of the inner wall of the clamping groove, and a porous plate is clamped on the inner wall of the clamping groove.

[0007] Preferably, the gas circulation mechanism comprises a gas guide connector, a gas inlet pipe, a pressure gauge, a flow meter, a gas outlet pipe and a back pressure valve, the gas guide connector is inserted into the inner wall of the gas guide through hole, the gas inlet pipe and the gas outlet pipe are respectively inserted into the outer wall of the gas guide connector, the pressure gauge and the flow meter are respectively arranged on the outer wall of the gas inlet pipe, and the back pressure valve is arranged on the outer wall of the gas outlet pipe.

[0008] Further, the outer walls of the top and bottom of the bottom plate and the transparent plate are respectively provided with clamping push plates, the outer wall of one side of each clamping push plate is fixedly connected with a connecting block, the outer wall of one side of the connecting block is rotatably connected with a supporting column and an elastic telescopic rod respectively, the bottom outer wall of the supporting column is fixedly connected with a mounting plate, and the top outer wall of the elastic telescopic rod is fixedly connected with a supporting frame.

[0009] Further preferably, the water circulation mechanism comprises a water inlet connector, a circulation pipe, a water inlet pipe, a water pump, a water tank and an exhaust valve, the water tank is fixed to the top outer wall of the mounting plate, the circulation pipe is inserted into the top outer wall of the water tank, the exhaust valve is arranged on the outer wall of one side of the circulation pipe, the water inlet connector is inserted into the inner wall of the water guide through hole, the water pump is arranged on the outer wall of one side of the water tank, the water inlet pipe is inserted into the output port of the water pump, and the outer walls of one side of the water inlet connector are respectively inserted into the outer walls of the circulation pipe and the water inlet pipe.

[0010] As a preferred embodiment of the present application, the top outer wall of the mounting plate is fixedly connected with a first limiting plate and a second limiting plate, the supporting frame is slidably connected to the outer walls of the first limiting plate and the second limiting plate, the top outer wall of the supporting frame is fixedly connected with a guide frame, the top outer wall of the guide frame is fixedly connected with a control panel, and the pressure gauge, the flow meter, the water pump and the exhaust valve are electrically connected with the control panel.

[0011] As a further preferred embodiment of the present application, the inner wall of the guide frame is slidably connected with a counterweight, and the outer wall of the supporting frame is fixedly connected with a fixed frame.

[0012] As a further preferred embodiment of the present application, the outer walls of one side of the bottom plate and the transparent plate are provided with sealing elements, the top outer wall of the supporting frame is inserted into a limiting cylinder, and the circulation pipe is slidably connected to the inner wall of the limiting cylinder.

[0013] Based on the foregoing scheme, the outer wall of one side of the second limiting plate is fixedly connected with a mirror, the outer wall of one side of the first limiting plate is fixedly connected with an LED lamp plate, and the LED lamp plate is electrically connected with the control panel.

[0014] The present application has the following advantages:

[0015] 1. The air side flow field of the designed bipolar plate is processed on the surface of the transparent plate, and a porous plate with a pore size of 5um is inserted into the clamping groove. Then the bottom plate and the transparent plate are fastened and sealed by bolts and nuts, and are connected with the gas circulation mechanism and the water circulation mechanism respectively through pipelines. Water is sprayed into the water tank through the water circulation mechanism, and then the surface of the porous plate is observed through the transparent plate. When bubbles are generated, the gas circulation mechanism is opened. After the flow in the gas circulation mechanism is stable, the drainage effect of the liquid water in the bipolar plate flow channel is observed through the transparent plate, so that the influence of the bipolar plate flow channel on the drainage effect of the bipolar plate can be directly evaluated.

[0016] 2. The staff first opens the exhaust valve to release the gas in the circulating pipe and the water inlet pipe, and then turns on the water pump. The water pump sends the water in the water tank into the water tank through the water inlet pipe. The water pump is set to rotate, and the surface of the porous plate is observed through the transparent plate. When bubbles are generated, the gas circulation mechanism can be opened.

[0017] 3. The staff first fixes the bottom plate and the transparent plate together by bolts, and then places the bottom plate and the transparent plate in the clamping push disc at the top of the supporting column. Then push the supporting frame to move downward as a whole, so that the clamping push disc connected to the bottom of the supporting frame by the elastic expansion rod can clamp and fix the bottom plate and the transparent plate as a whole, improving the stability of the bottom plate and the transparent plate. The elastic expansion rod can push the clamping push disc to extrude the bottom plate and the transparent plate by its own elastic force.

[0018] 4. When the staff observes the transparent plate, the LED light plate can be turned on through the control panel. At this time, the light of the LED light plate will shine from one side of the bottom plate and the transparent plate, and pass through the transparent plate to shine on the side of the reflector. The light on the side of the reflector will be reflected on the other side of the bottom plate and the transparent plate, so that the inside of the transparent plate can be illuminated more clearly and brightly by the LED light plate, improving the observation effect of the staff on the bipolar plate flow channel on one side of the transparent plate.

[0019] 5. The staff can insert the counterweight into the guide frame, so that the counterweight can extrude the supporting frame as a whole to move downward by its own gravity, so that the clamping push discs on both sides of the bottom plate and the transparent plate can be clamped and fixed more firmly. At the same time, after the supporting frame moves downward to the appropriate position, the staff can fix the fixing frame on the outer wall of the first limiting plate and the second limiting plate by screws. DETAILED DESCRIPTION

[0020] Figure 1 The main view structure schematic diagram of the visualization device for evaluating the drainage capacity of the bipolar plate is provided;

[0021] Figure 2 The side view structure schematic diagram of the visualization device for evaluating the drainage capacity of the bipolar plate is provided;

[0022] Figure 3 A bottom plate structure schematic diagram of a visualization device for evaluating the drainage capacity of a bipolar plate is proposed in the present application;

[0023] Figure 4 A transparent plate structure schematic diagram of a visualization device for evaluating the drainage capacity of a bipolar plate is proposed in the present application;

[0024] Figure 5 An exploded structure schematic diagram of a visualization device for evaluating the drainage capacity of a bipolar plate is proposed in the present application;

[0025] Figure 6 An exploded structure side view schematic diagram of a visualization device for evaluating the drainage capacity of a bipolar plate is proposed in the present application;

[0026] Figure 7 A circuit flow schematic diagram of a visualization device for evaluating the drainage capacity of a bipolar plate is proposed in the present application.

[0027] In the figure: 1 bottom plate, 2 water tank, 3 back pressure valve, 4 air outlet pipe, 5 mounting plate, 6 pressure gauge, 7 air inlet pipe, 8 LED light plate, 9 fixed frame, 10 support frame, 11 first limiting plate, 12 counterweight, 13 control panel, 14 guide frame, 15 exhaust valve, 16 second limiting plate, 17 circulating pipe, 18 limiting cylinder, 19 reflector, 20 transparent plate, 21 water pump, 22 water inlet pipe, 23 support column, 24 clamping push disc, 25 connecting block, 26 elastic telescopic rod, 27 air guide connector, 28 water delivery connector, 29 bipolar plate flow channel, 30 perforated plate, 31 sealing element, 32 air guide through hole, 33 water guide through hole, 34 water inlet groove, 35 clamping groove, 36 flow meter. DETAILED DESCRIPTION

[0028] The technical solutions of the present patent will be further described in detail below in combination with specific embodiments.

[0029] The embodiments of the present patent will be described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference signs represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the accompanying drawings are exemplary and are only used to explain the present patent, and cannot be understood as a limitation on the present patent.

[0030] In the description of the present patent, it should be understood that the orientations or positional relationships indicated by the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present patent and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present patent.

[0031] In the description of this patent, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "setting" should be interpreted broadly. For example, they can refer to a fixed connection or setting, a detachable connection or setting, or an integral connection or setting. Those skilled in the art can understand the specific meaning of the above terms in this patent according to the specific circumstances.

[0032] Example 1:

[0033] A visualization device for evaluating the drainage capacity of bipolar plates, such as Figures 1-7 As shown, the device includes a base plate 1. A transparent plate 20 is fixed to one outer wall of the base plate 1 by bolts. Air guide holes 32 and water guide holes 33 are respectively opened on one outer wall of the base plate 1 and the transparent plate 20. Air guide connectors 27 and water supply connectors 28 are respectively inserted into the inner walls of the air guide holes 32 and the water supply holes 33. A gas circulation mechanism is provided on the outer wall of the air guide connector 27, and a water circulation mechanism is provided on the outer wall of the water supply connector 28. A bipolar plate flow channel 29 is provided on one outer wall of the base plate 1. A slot 35 is opened on one outer wall of the transparent plate 20. A water inlet groove 34 is opened on one inner wall of the slot 35. A perforated plate 30 is snapped into the inner wall of the slot 35.

[0034] The air-side flow field of the bipolar plate is fabricated on one side surface of the transparent plate 20, and a porous plate 30 with a pore size of 5 μm is placed inside the slot 35. The base plate 1 and the transparent plate 20 are then secured with bolts and nuts. They are connected to a gas circulation mechanism and a water circulation mechanism via pipelines. Water is sprayed into the inlet tank 34 through the water circulation mechanism. The surface of the porous plate 30 is then observed through the transparent plate 20. When bubbles are generated, the gas circulation mechanism is activated. After the flow rate inside the gas circulation mechanism stabilizes, the drainage effect of the liquid water in the bipolar plate flow channel 29 is observed through the transparent plate 20, thus allowing for a direct evaluation of the impact of the bipolar plate flow channel 29 on the bipolar plate drainage effect.

[0035] like Figures 1-4 As shown, the gas circulation mechanism includes a gas guide connector 27, an inlet pipe 7, a pressure gauge 6, a flow meter 36, an outlet pipe 4, and a back pressure valve 3. The gas guide connector 27 is inserted into the inner wall of the gas guide hole 32. The inlet pipe 7 and the outlet pipe 4 are respectively inserted into the outer wall of the gas guide connector 27. The pressure gauge 6 and the flow meter 36 are respectively set on the outer wall of the inlet pipe 7. The back pressure valve 3 is set on the outer wall of the outlet pipe 4. The operator connects the outlet pipe 4 and the inlet pipe 7 to an external air pump, then turns on the air pump, sets the air pump flow rate to 50L / min and the pressure to 120kPa, and introduces air through the inlet pipe 7 into the space between the perforated plate 30 and the bipolar plate channel 29, and then discharges it through the outlet pipe 4. The pressure gauge 6 can detect the air pressure flowing through the inlet pipe 7, and the flow meter 36 can detect the gas flow rate flowing through the inlet pipe 7.

[0036] As Figures 1-2 shown, the bottom plate 1 and transparent plate 20 top and bottom outer wall are provided with clamping push plate 24 respectively, clamping push plate 24 one side outer wall is fixed with connecting block 25, connecting block 25 one side outer wall is rotatably connected with support column 23 and elastic telescopic rod 26 respectively, support column 23 bottom outer wall is fixed with mounting plate 5, elastic telescopic rod 26 top outer wall is fixed with support frame 10; support column 23 through clamping push plate 24 to the fixed together after the bottom plate 1 and transparent plate 20 are clamped and fixed, staff can through support column 23 conveniently to the bottom plate 1 and transparent plate 20 are rotated, so as to facilitate staff to observe the condition of the transparent plate 20 one side bipolar plate flow channel 29.

[0037] As Figures 1-2 shown, the water circulation mechanism includes water inlet joint 28, circulating pipe 17, water inlet pipe 22, water pump 21, water tank 2 and exhaust valve 15, water tank 2 is fixed on the top outer wall of mounting plate 5 by screw, circulating pipe 17 is inserted on the top outer wall of water tank 2, exhaust valve 15 is arranged on one side outer wall of circulating pipe 17, water inlet joint 28 is inserted on the inner wall of water guide through hole 33, water pump 21 is arranged on one side outer wall of water tank 2, water inlet pipe 22 is inserted on the output port of water pump 21, water inlet joint 28 one side outer wall is inserted on the outer wall of circulating pipe 17 and water inlet pipe 22 respectively; staff first opens exhaust valve 15 to discharge the gas inside circulating pipe 17 and water inlet pipe 22, then opens water pump 21, water pump 21 sends the water inside water tank 2 into water inlet groove 34 through water inlet pipe 22, sets the rotating speed of water pump 21 to 1000 revolutions, observes the surface of perforated plate 30 through transparent plate 20, when the bubbles are generated, the gas circulation mechanism can be opened.

[0038] As Figures 1-2 shown, the top outer wall of mounting plate 5 is fixed with first limiting plate 11 and second limiting plate 16 by screw, support frame 10 is slidingly connected to the outer wall of first limiting plate 11 and second limiting plate 16, support frame 10 top outer wall is fixed with guide frame 14 through screw, guide frame 14 top outer wall is fixed with control panel 13 through screw, pressure gauge 6, flowmeter 36, water pump 21 and exhaust valve 15 are electrically connected with control panel 13 respectively; staff first fixes the bottom plate 1 and transparent plate 20 together through bolt, then can place the bottom plate 1 and transparent plate 20 into the clamping push plate 24 on the top of support column 23, then pushes the support frame 10 to move downward as a whole, so that the support frame 10 bottom is clamped and fixed to the bottom plate 1 and transparent plate 20 as a whole through the clamping push plate 24 connected by elastic telescopic rod 26, improves the stability of the bottom plate 1 and transparent plate 20 as a whole, the elastic telescopic rod 26 can push the clamping push plate 24 to extrude the bottom plate 1 and transparent plate 20 through its own elastic force.

[0039] As Figures 1-2As shown, the inner wall of the guide frame 14 is slidingly connected with the counterweight 12, the outer wall of the support frame 10 is fixed with the fixed frame 9, and the fixed frame 9 is fixed on the outer wall of the first limiting plate 11 and the second limiting plate 16 by screws; the staff can insert the counterweight 12 into the guide frame 14, so that the counterweight 12 can extrude the support frame 10 as a whole to move downward by its own gravity, so that the clamping push disc 24 on both sides of the bottom plate 1 and the transparent plate 20 can be clamped and fixed more firmly, and at the same time, after the support frame 10 moves to the appropriate position, the staff can fix the fixed frame 9 on the outer wall of the first limiting plate 11 and the second limiting plate 16 by screws.

[0040] As shown in Figure 2 , Figure 5 and Figure 6 , the outer wall of one side of the bottom plate 1 and the transparent plate 20 is provided with a sealing element 31, the top outer wall of the support frame 10 is inserted into a limiting cylinder 18, and a circulating pipe 17 is slidingly connected to the inner wall of the limiting cylinder 18; the sealing element 31 can improve the sealing performance of the connecting part between the bottom plate 1 and the transparent plate 20, wherein the flowmeter 36 can be one of a mass flowmeter and a rotor flowmeter, the material of the sealing element 31 can be one of silicone rubber, fluororubber and olefin rubber, the multi-hole plate 30 is a multi-hole plate material with a characteristic pore size of 1-100um, and the material can be metal, graphite and other high polymer materials; the multi-hole plate 30 is fixed in the inner wall of the clamping groove 35 by sealing glue, and the material of the transparent plate 20 is organic glass.

[0041] In use, the air side flow field of the bipolar plate is processed on one side surface of the transparent plate 20, and the multi-hole plate 30 with a pore size of 5um is placed in the clamping groove 35. Then the bottom plate 1 and the transparent plate 20 are fastened and sealed by bolts and nuts, and are connected with the gas circulation mechanism and the water circulation mechanism through pipelines respectively. Water is sprayed into the water tank 34 through the water circulation mechanism, and then the surface of the multi-hole plate 30 is observed through the transparent plate 20. When bubbles are generated, the gas circulation mechanism is opened, and after the flow in the gas circulation mechanism is stabilized, the drainage effect of the liquid water in the bipolar plate flow channel 29 is observed through the transparent plate 20. The staff connects the gas outlet pipe 4 and the gas inlet pipe 7 with the external air pump, and then opens the air pump, sets the air pump flow to 50L / min and the pressure to 120kPa, and then passes the air through the gas inlet pipe 7 into the space between the multi-hole plate 30 and the bipolar plate flow channel 29, and then discharges through the gas outlet pipe 4. The pressure gauge 6 can detect the gas pressure flowing through the gas inlet pipe 7, and the flowmeter 36 can detect the gas flow flowing through the gas inlet pipe 7.

[0042] The support column 23 clamps and fixes the fixed bottom plate 1 and the transparent plate 20 through the clamping push disc 24, and the staff can conveniently rotate the bottom plate 1 and the transparent plate 20 through the support column 23. The staff first opens the exhaust valve 15 to discharge the gas in the circulating pipe 17 and the water inlet pipe 22, and then opens the water pump 21. The water pump 21 sends the water in the water tank 2 into the water inlet groove 34 through the water inlet pipe 22. The rotating speed of the water pump 21 is set to 1000 rpm. The surface of the perforated plate 30 is observed through the transparent plate 20. When bubbles are generated, the gas circulation mechanism can be opened.

[0043] The staff first fixes the bottom plate 1 and the transparent plate 20 together through bolts, and then places the bottom plate 1 and the transparent plate 20 into the clamping push disc 24 at the top of the support column 23. Then the support frame 10 is pushed to move downward as a whole, so that the support frame 10 at the bottom is clamped and fixed to the bottom plate 1 and the transparent plate 20 through the clamping push disc 24 connected by the elastic telescopic rod 26.

[0044] Embodiment 2:

[0045] A kind of visual device for evaluating the drainage capacity of bipolar plate, as shown in Figures 1-2 The second limiting plate 16 is fixed with a mirror 19 on one side of the outer wall, and the first limiting plate 11 is fixed with an LED lamp plate 8 on one side of the outer wall. The LED lamp plate 8 is electrically connected with the control panel 13. When the staff observes the transparent plate 20, the LED lamp plate 8 can be turned on through the control panel 13. At this time, the light of the LED lamp plate 8 will shine from one side of the bottom plate 1 and the transparent plate 20, and will pass through the transparent plate 20 to shine on the side of the mirror 19. The light on the side of the mirror 19 will be reflected on the other side of the bottom plate 1 and the transparent plate 20, so that the inside of the transparent plate 20 can be illuminated more clearly and brightly by the LED lamp plate 8, and the observation effect of the staff on the bipolar plate flow channel 29 on one side of the transparent plate 20 is improved.

[0046] In use, when the staff observes the transparent plate 20, the LED lamp plate 8 can be turned on through the control panel 13. At this time, the light of the LED lamp plate 8 will shine from one side of the bottom plate 1 and the transparent plate 20, and will pass through the transparent plate 20 to shine on the side of the mirror 19. The light on the side of the mirror 19 will be reflected on the other side of the bottom plate 1 and the transparent plate 20, so that the inside of the transparent plate 20 can be illuminated more clearly and brightly by the LED lamp plate 8.

[0047] The above is only the preferred specific implementation of the present application, but the protection scope of the present application is not limited to this. Any person skilled in the art can make equivalent replacement or change within the technical range disclosed by the present application according to the technical solution and the inventive concept of the present application, which should be covered within the protection scope of the present application.

Claims

1. A visualization device for assessing the water drainage capacity of bipolar plates, comprising a base plate (1), characterized in that, The bottom plate (1) one side outer wall is fixed with transparent plate (20) through bolt, and the bottom plate (1) and transparent plate (20) one side outer wall is opened with gas guide through hole (32) and water guide through hole (33) respectively, and the inner wall of gas guide through hole (32) and water guide through hole (33) is inserted with gas guide joint (27) and water supply joint (28) respectively, the outer wall of gas guide joint (27) is provided with gas circulation mechanism, the outer wall of water supply joint (28) is provided with water circulation mechanism, the one side outer wall of bottom plate (1) is provided with bipolar plate flow channel (29), the one side outer wall of transparent plate (20) is opened with clamping groove (35), the one side inner wall of clamping groove (35) is opened with water inlet groove (34), and the inner wall of clamping groove (35) is clamped with porous plate (30); The gas circulation mechanism includes gas guide joint (27), air inlet pipe (7), pressure gauge (6), flowmeter (36), air outlet pipe (4) and back pressure valve (3), the inner wall of gas guide through hole (32) is inserted with gas guide joint (27), the outer wall of gas guide joint (27) is inserted with air inlet pipe (7) and air outlet pipe (4) respectively, the outer wall of air inlet pipe (7) is provided with pressure gauge (6) and flowmeter (36) respectively, and the outer wall of air outlet pipe (4) is provided with back pressure valve (3); The top and bottom outer walls of the bottom plate (1) and the transparent plate (20) are respectively provided with clamping push disc (24), the one side outer wall of the clamping push disc (24) is fixed with connecting block (25), the one side outer wall of the connecting block (25) is rotatably connected with support column (23) and elastic telescopic rod (26) respectively, the bottom outer wall of the support column (23) is fixed with mounting plate (5), and the top outer wall of the elastic telescopic rod (26) is fixed with support frame (10); The water circulation mechanism includes water supply joint (28), circulating pipe (17), water inlet pipe (22), water pump (21), water tank (2) and exhaust valve (15), the top outer wall of the water tank (2) is fixed on the mounting plate (5), the top outer wall of the water tank (2) is inserted with the circulating pipe (17), the one side outer wall of the circulating pipe (17) is provided with the exhaust valve (15), the inner wall of the water guide through hole (33) is inserted with the water supply joint (28), the one side outer wall of the water tank (2) is provided with the water pump (21), the output port of the water pump (21) is inserted with the water inlet pipe (22), and the one side outer wall of the water supply joint (28) is respectively inserted with the outer walls of the circulating pipe (17) and the water inlet pipe (22); The top outer wall of the mounting plate (5) is fixed with first limiting plate (11) and second limiting plate (16), the support frame (10) is slidably connected to the outer walls of the first limiting plate (11) and the second limiting plate (16), the top outer wall of the support frame (10) is fixed with guide frame (14), the top outer wall of the guide frame (14) is fixed with control panel (13), and the pressure gauge (6), the flowmeter (36), the water pump (21) and the exhaust valve (15) are electrically connected with the control panel (13) respectively.

2. A visualisation device for assessing the water drainage capacity of a bipolar plate according to claim 1, characterised in that, The inner wall of the guide frame (14) is slidably connected with counterweight (12), and the outer wall of the support frame (10) is fixed with fixed frame (9), and the fixed frame (9) is fixed on the outer walls of the first limiting plate (11) and the second limiting plate (16).

3. A visualisation device for assessing the water drainage capacity of a bipolar plate according to claim 1, characterised in that, The bottom plate (1) and the transparent plate (20) are provided with sealing elements (31) on one side of the outer wall, the support frame (10) is inserted into the limiting cylinder (18) on the top of the outer wall, and the circulating pipe (17) is slidably connected to the inner wall of the limiting cylinder (18).

4. A visualisation device for assessing the water drainage capacity of a bipolar plate according to claim 2, characterised in that, The second limiting plate (16) is fixed with a reflector (19) on one side of the outer wall, and the first limiting plate (11) is fixed with an LED lamp plate (8) on one side of the outer wall, and the LED lamp plate (8) is electrically connected with the control panel (13).

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