A plate testing device

Abstract

The application relates to a polar plate testing device, which comprises an air inlet assembly and an air outlet assembly, the air inlet assembly comprises an air inlet upper plate and an air inlet lower plate, the air inlet upper plate is provided with an air inlet, the air inlet upper plate and the air inlet lower plate are detachably connected, and the air inlet upper plate and the air inlet lower plate are used for placing a polar plate; the air outlet assembly comprises an air outlet upper plate and an air outlet lower plate, the air outlet upper plate is provided with an air outlet, the air outlet upper plate and the air outlet lower plate are detachably connected, and the air outlet upper plate and the air outlet lower plate are used for placing a polar plate; wherein the air inlet assembly is arranged at a liquid inlet cavity opening of the polar plate, the air outlet assembly is arranged at a liquid outlet cavity opening of the polar plate, the air inlet assembly is used for injecting gas or liquid into the liquid inlet cavity opening, the air outlet assembly is used for controlling the discharging speed of the liquid outlet cavity opening, and the sealing performance of the polar plate is detected.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of fuel cells, in particular to a polar plate testing device. BACKGROUND

[0002] With the continuous highlighting of the skill source crisis and environmental pollution, fuel cells have become an important research direction of new energy. Fuel cells have extremely high energy utilization rate through the reaction of hydrogen and oxygen, and their reaction products are only water, which will not pollute the environment. However, the safety of fuel cells has always been the focus of research. The polar plate of the fuel cell is usually a double-layer structure, and the two layers have a channel for the flow of cooling liquid. However, due to the connection process or the structure of the material itself, there may be a problem of insufficient sealing. If the sealing of the polar plate is a problem, it will seriously affect the safety of the use of the fuel cell. Therefore, a device for detecting the sealing of the polar plate is needed. SUMMARY

[0003] The present application provides a polar plate testing device for solving the problem of detecting the sealing of the polar plate of the fuel cell.

[0004] The present application provides a polar plate testing device, which comprises:

[0005] An air inlet assembly, which comprises an air inlet upper plate and an air inlet lower plate, the air inlet upper plate has an air inlet port, the air inlet upper plate and the air inlet lower plate are detachably connected, and the air inlet upper plate and the air inlet lower plate are used for placing the polar plate therebetween;

[0006] An air outlet assembly, which comprises an air outlet upper plate and an air outlet lower plate, the air outlet upper plate has an air outlet port, the air outlet upper plate and the air outlet lower plate are detachably connected, and the air outlet upper plate and the air outlet lower plate are used for placing the polar plate therebetween;

[0007] The air inlet assembly is arranged at the liquid inlet cavity port of the polar plate, and the air outlet assembly is arranged at the liquid outlet cavity port of the polar plate, so as to inject gas or liquid into the liquid inlet cavity port through the air inlet assembly and control the discharge speed of the liquid outlet cavity port through the air outlet assembly.

[0008] In a possible implementation, the air inlet upper plate, the air inlet lower plate, the air outlet upper plate and the air outlet lower plate are respectively provided with mounting holes, the mounting holes are used for mounting connecting members, and the air inlet upper plate and the air inlet lower plate, and the air outlet upper plate and the air outlet lower plate are connected through the connecting members respectively.

[0009] In a possible implementation, the inner wall of the mounting hole is provided with threads, and the connecting member is a bolt.

[0010] In a possible implementation, the polar plate testing device comprises a plurality of mounting holes, which are respectively located on both sides of the air inlet and both sides of the air outlet along the width direction of the polar plate testing device.

[0011] In a possible implementation, the air inlet upper plate and the air inlet lower plate have protrusions, and the air outlet upper plate and the air outlet lower plate have recessions, the protrusions being capable of extending into the recessions for mounting and positioning the air inlet upper plate and the air inlet lower plate, and the air outlet upper plate and the air outlet lower plate.

[0012] In a possible implementation, the mounting holes extend through the protrusions and the recessions along the thickness direction of the polar plate testing device.

[0013] In a possible implementation, the air outlet is provided with a control valve for controlling the flow rate of the air outlet.

[0014] In a possible implementation, the air inlet upper plate, the air inlet lower plate, the air outlet upper plate and the air outlet lower plate are flat on the side close to the polar plate, for abutting against the seal of the polar plate.

[0015] In a possible implementation, the air inlet is provided with an air inlet pipe, which protrudes away from the air inlet lower plate.

[0016] The polar plate testing device provided by the present application comprises an air inlet assembly and an air outlet assembly, the air inlet assembly comprises an air inlet upper plate and an air inlet lower plate, the air inlet upper plate is provided with an air inlet, the air inlet upper plate and the air inlet lower plate are detachably connected, and the air inlet upper plate and the air inlet lower plate are used for placing a polar plate, the air outlet assembly comprises an air outlet upper plate and an air outlet lower plate, the air outlet upper plate is provided with an air outlet, the air outlet upper plate and the air outlet lower plate are detachably connected, and the air outlet upper plate and the air outlet lower plate are used for placing a polar plate, wherein the air inlet assembly is arranged at the liquid inlet cavity opening of the polar plate, the air outlet assembly is arranged at the liquid outlet cavity opening of the polar plate, the air inlet assembly is used for injecting gas or liquid into the liquid inlet cavity opening, the air outlet assembly is used for controlling the discharge speed of the liquid outlet cavity opening, and the sealing performance of the polar plate is detected.

[0017] It should be understood that the foregoing general description and the following detailed description are only exemplary and do not limit the present application. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 An exploded view of an embodiment of the polar plate testing device provided by the present application;

[0019] Figure 2 An exploded view of an embodiment of the air inlet assembly provided by the present application;

[0020] Figure 3 An exploded view of one embodiment of the air outlet assembly provided in the present application.

[0021] Reference signs:

[0022] 1 - air inlet assembly;

[0023] 11 - air inlet upper plate;

[0024] 12 - air inlet lower plate;

[0025] 13 - air inlet;

[0026] 14 - air inlet pipe;

[0027] 2 - air outlet assembly;

[0028] 21 - air outlet upper plate;

[0029] 22 - air outlet lower plate;

[0030] 23 - air outlet;

[0031] 24 - control valve;

[0032] 3 - polar plate;

[0033] 31 - liquid inlet cavity opening;

[0034] 32 - liquid outlet cavity opening;

[0035] 33 - sealing element;

[0036] 34 - oxygen cavity opening;

[0037] 35 - hydrogen cavity opening;

[0038] 4 - mounting hole;

[0039] 41 - protrusion;

[0040] 42 - recess;

[0041] 5 - connecting element.

[0042] The accompanying drawings, which are incorporated herein and constitute part of this specification, illustrate embodiments consistent with the present application and serve to explain the principles of the present application together with the description herein. DETAILED DESCRIPTION

[0043] In order to better understand the technical solutions of the present application, the embodiments of the present application are described in detail below in conjunction with the drawings.

[0044] It should be noted that the described embodiments are merely some of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of protection of the present application.

[0045] The terms used in the embodiments of the present application are merely for the purpose of describing the particular embodiments and are not intended to limit the present application. The singular forms "a", "an" and "the" used in the embodiments of the present application and the appended claims are also intended to include the plural forms, unless the context clearly indicates otherwise.

[0046] It should be understood that the term "and / or" used herein is merely to describe an association relationship of associated objects, which means that there can be three relationships, for example, A and / or B can mean that A exists alone, A and B exist together, and B exists alone. In addition, the character " / " herein generally represents an "or" relationship between the front and rear associated objects.

[0047] It should be noted that the "up", "down", "left", "right" and other directional words described in the embodiments of the present application are described from the angle shown in the drawings, and should not be understood as a limitation on the embodiments of the present application. In addition, in the context, it should also be understood that when referring to an element connected "on" or "under" another element, it can be directly connected "on" or "under" another element, or indirectly connected "on" or "under" another element through an intermediate element.

[0048] As shown in FIG. 1, Figure 1 As shown in FIG. 1,

[0049] The polar plate 3 of the fuel cell is one of the core components of the fuel cell, and the polar plate 3 has a cooling cavity for containing cooling water inside. The cooling cavity is provided with an inlet cavity opening 31 and an outlet cavity opening 32 at two ends respectively, for circulating cooling liquid to achieve the functions of cooling and heat dissipation. The sealing performance of the cooling cavity determines the safety of the fuel cell. If the cooling liquid leaks during use, it will seriously affect the use effect and safety of the fuel cell. Therefore, the sealing performance of the polar plate 3 needs to be detected. The polar plate testing device provided in the embodiments of the present application is used to test the sealing performance of the polar plate 3. The polar plate 3 has a cooling liquid channel, and the two ends of the cooling liquid channel are respectively provided with an inlet cavity opening 31 and an outlet cavity opening 32. The gas inlet assembly 1 is arranged at the inlet cavity opening 31. Specifically, the gas inlet upper plate 11 and the gas inlet lower plate 12 are arranged on the two sides of the polar plate 3 along the thickness direction of the polar plate 3. The gas inlet upper plate 11 and the gas inlet lower plate 12 are connected to each other and clamp the polar plate 3. The gas inlet opening 13 is in communication with the inlet cavity opening 31. The gas outlet assembly 2 is arranged at the outlet cavity opening 32. Specifically, the gas outlet upper plate 21 and the gas outlet lower plate 22 are arranged on the two sides of the polar plate 3 along the thickness direction of the polar plate 3. The gas outlet upper plate 21 and the gas outlet lower plate 22 are connected to each other and clamp the polar plate 3. The gas outlet opening 23 is in communication with the inlet cavity opening 31. The polar plate 3 has a sealing element 33. When the gas inlet assembly 1 and the gas outlet assembly 2 are installed on the polar plate 3, the sealing element 33 can play a sealing role between the polar plate 3 and the polar plate testing device. When the polar plate testing device is installed on the polar plate 3, gas is injected through the gas inlet opening 13, and the exhaust speed of the gas outlet opening 23 is controlled. Specifically, the exhaust speed can be controlled by closing the gas outlet opening 23 or changing the size of the gas outlet opening 23, so as to control the pressure inside the polar plate 3, and reduce the possibility of the polar plate 3 being cracked due to excessive pressure. When the gas injection test is performed, the polar plate testing device and the polar plate 3 can be placed in water, so as to facilitate observation of the gas leakage position. The polar plate testing device provided in the present application adopts a split design. The gas inlet assembly 1 and the gas outlet assembly 2 are arranged at the two ends of the polar plate 3 respectively, and do not block or cover the relative middle position of the polar plate 3. Therefore, whether bubbles appear on the surface of the polar plate 3 and the position of the bubbles can be used to judge the sealing performance or the leakage position of the polar plate 3. Alternatively, the polar plate testing device can inject liquid into the polar plate 3 to detect the sealing performance of the polar plate 3. The colored liquid is selected to facilitate observation of whether the liquid leaks and the leakage position, so as to judge the sealing performance of the polar plate 3.

[0050] As shown in Figure 1 In a possible implementation, the gas inlet upper plate 11, the gas inlet lower plate 12, the gas outlet upper plate 21 and the gas outlet lower plate 22 are respectively provided with mounting holes 4 for mounting connecting pieces 5. The gas inlet upper plate 11 and the gas inlet lower plate 12, and the gas outlet upper plate 21 and the gas outlet lower plate 22 are connected by the connecting pieces 5 respectively.

[0051] The air inlet upper plate 11 and the air inlet lower plate 12, and the air outlet upper plate 21 and the air outlet lower plate 22 are respectively provided with mounting holes 4, which are used to install connecting members 5, through which the air inlet upper plate 11 and the air inlet lower plate 12, and the air outlet upper plate 21 and the air outlet lower plate 22 are connected, and the air inlet assembly 1 and the air outlet assembly 2 are installed on the polar plate 3.

[0052] In a possible implementation, the inner wall of the mounting hole 4 is provided with threads, and the connecting member 5 is a bolt.

[0053] The bolt can pass through the mounting hole 4 and connect the air inlet upper plate 11 and the air inlet lower plate 12, and the bolt can cooperate with the threads in the mounting hole 4 to achieve a fastening effect, and the air outlet upper plate 21 and the air outlet lower plate 22 can be connected in the same way. By threads, it is also convenient to control the tightness of the connection of the air inlet upper plate 11 and the air inlet lower plate 12, so as to facilitate the cooperation of the polar plate testing device and the sealing member 33 of the polar plate 3 to maintain the sealing property, and improve the accuracy of the test results.

[0054] As shown in Figure 1 , in a possible implementation, the polar plate testing device includes a plurality of mounting holes 4, which are respectively located on both sides of the air inlet 13 and on both sides of the air outlet 23 along the width direction of the polar plate testing device.

[0055] The air inlet assembly 1 and the air outlet assembly 2 respectively have two mounting holes 4, which are respectively arranged on both sides of the air inlet 13 and on both sides of the air outlet 23, wherein the air inlet 13 and the air outlet 23 are respectively arranged corresponding to the liquid inlet cavity opening 31 and the liquid outlet cavity opening 32, and the polar plate 3 is further provided with a hydrogen cavity opening 35 and an oxygen cavity opening 34 on both sides of the liquid inlet cavity opening 31 and on both sides of the liquid outlet cavity opening 32, respectively. The mounting holes 4 are arranged corresponding to the hydrogen cavity opening 35 and the oxygen cavity opening 34, and the connecting members 5 installed in the mounting holes 4 can respectively pass through the hydrogen cavity opening 35 or the oxygen cavity opening 34, so as to avoid interference with the polar plate 3. The plurality of connecting members 5 cooperates with the mounting holes 4, which can improve the stability of the installation of the polar plate testing device.

[0056] As shown in Figure 2 and Figure 3 , in a possible implementation, the air inlet upper plate 11 and the air outlet upper plate 21 have protruding portions 41, and the air inlet lower plate 12 and the air outlet lower plate 22 have recessed portions 42, the protruding portions 41 can extend into the recessed portions 42, for positioning the air inlet upper plate 11 and the air inlet lower plate 12, and the air outlet upper plate 21 and the air outlet lower plate 22.

[0057] The protruding part 41 is arranged on the side of the air inlet upper plate 11 close to the air inlet lower plate 12 and protrudes towards the air inlet lower plate 12. The protruding part 41 is also arranged on the side of the air outlet upper plate 21 close to the air outlet lower plate 22 and protrudes towards the air outlet lower plate 22. When the air outlet upper plate 21 and the air outlet lower plate 22 are matched with each other, the protruding part 41 can extend into the recessed part 42 to achieve a positioning effect, thereby facilitating the installation of the air inlet assembly 1 and the air outlet assembly 2 on the polar plate 3. When the protruding part 41 extends into the recessed part 42, the bottom wall of the protruding part 41 and the recessed part 42 abut to support the air inlet upper plate 11 and the air inlet lower plate 12, thereby reducing the possibility that the polar plate 3 is damaged due to the air inlet upper plate 11 and the air inlet lower plate 12 being connected too tightly. The same effect can be achieved for the air outlet upper plate 21 and the air outlet lower plate 22.

[0058] In a possible implementation, the mounting hole 4 extends through the protruding part 41 and the recessed part 42 along the thickness direction of the polar plate testing device.

[0059] When the protruding part 41 and the recessed part 42 are matched with each other, the mounting holes 4 of the air inlet upper plate 11 and the air inlet lower plate 12 can be positioned and aligned, and the mounting holes 4 of the air outlet upper plate 21 and the air outlet lower plate 22 can be positioned and aligned, thereby facilitating the cooperation between the connecting member 5 and the mounting hole 4.

[0060] As shown in FIG. 1, in a possible implementation, the air outlet 23 is provided with a control valve 24 for controlling the flow rate of the air outlet 23. Figure 3

[0061] The control valve 24 is used to control the flow rate of the air outlet 23. When the polar plate testing device tests the sealing performance of the polar plate 3, the control valve 24 can be adjusted to control the flow rate of the gas or liquid, thereby controlling the pressure inside the polar plate 3 and keeping the pressure inside the polar plate 3 at a proper value to detect the leakage point. In addition, the risk that the polar plate 3 is cracked due to excessive internal pressure can be reduced. By controlling the flow rate of the air outlet 23 through the control valve 24, the pressure inside the polar plate 3 can be kept at a relatively high level, and the pressure gas or liquid can be continuously introduced into the air inlet 13 until the polar plate 3 is damaged and leaks. In this way, the failure mode and position of the polar plate 3 can be effectively observed, and the weak position of the connection and structure of the polar plate 3 can be further analyzed and confirmed, thereby facilitating the design and problem analysis of the polar plate 3. The control valve 24 can be a threaded valve.

[0062] In a possible implementation, the side of the air inlet upper plate 11, the air inlet lower plate 12, the air outlet upper plate 21 and the air outlet lower plate 22 close to the polar plate 3 is a plane and can abut against the sealing member 33 of the polar plate 3.

[0063] ​The two sides of the polar plate 3 have sealing members 33, which are used for sealing when the polar plate 3 is installed. When the polar plate 3 is tested, the upper inlet plate 11 and the lower inlet plate 12 are arranged on the two sides of the polar plate 3 and abut against the sealing members 33, and the upper outlet plate 21 and the lower outlet plate 22 also abut against the sealing members 33. The positions and sizes of the liquid inlet openings 31 and the liquid outlet openings 32 of different types of polar plates 3 can be different. The side of the upper inlet plate 11, the lower inlet plate 12, the upper outlet plate 21 and the lower outlet plate 22 close to the polar plate 3 is a plane, so that the different polar plates 3 can abut against each other, thereby being compatible with different types of polar plates 3, and having good compatibility.

[0064] In a possible implementation, the gas inlet 13 has a gas inlet pipe 14, which protrudes away from the lower inlet plate 12.

[0065] The gas inlet pipe 14 protrudes relative to the gas inlet 13, and the gas inlet pipe 14 and the gas inlet 13 are in communication with each other. Other external devices can be connected through the gas inlet pipe 14, thereby facilitating injection of liquid or gas into the gas inlet 13.

[0066] The polar plate testing device provided by the embodiment of the present application includes a gas inlet assembly 1 and a gas outlet assembly 2. The gas inlet assembly 1 includes an upper inlet plate 11 and a lower inlet plate 12. The upper inlet plate 11 has a gas inlet 13. The upper inlet plate 11 and the lower inlet plate 12 are detachably connected. The upper inlet plate 11 and the lower inlet plate 12 are used for placing a polar plate 3 therebetween. The gas outlet assembly 2 includes an upper outlet plate 21 and a lower outlet plate 22. The upper outlet plate 21 has a gas outlet 23. The upper outlet plate 21 and the lower outlet plate 22 are detachably connected. The upper outlet plate 21 and the lower outlet plate 22 are used for placing the polar plate 3 therebetween. The gas inlet assembly 1 is arranged at a liquid inlet opening 31 of the polar plate 3. The gas outlet assembly 2 is arranged at a liquid outlet opening 32 of the polar plate 3. The gas inlet assembly 1 is used for injecting gas or liquid into the liquid inlet opening 31. The gas outlet assembly 2 is used for controlling the discharge speed of the liquid outlet opening 32, thereby detecting the sealing property of the polar plate.

[0067] The above only describes the preferred embodiments of the present application and is not used to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A plate testing device, characterized in that, The electrode testing device includes: An air intake assembly (1) includes an upper air intake plate (11) and a lower air intake plate (12). The upper air intake plate (11) has an air intake port (13). The upper air intake plate (11) and the lower air intake plate (12) are detachably connected. An electrode plate (3) is placed between the upper air intake plate (11) and the lower air intake plate (12). The gas outlet assembly (2) includes an upper gas outlet plate (21) and a lower gas outlet plate (22). The upper gas outlet plate (21) has a gas outlet (23). The upper gas outlet plate (21) and the lower gas outlet plate (22) are detachably connected. The upper gas outlet plate (21) and the lower gas outlet plate (22) are used to place the electrode plate (3). The air intake assembly (1) and the air outlet assembly (2) are respectively disposed at both ends of the electrode plate (3). The air intake assembly (1) is disposed at the liquid inlet (31) of the electrode plate (3), and the air outlet assembly (2) is disposed at the liquid outlet (32) of the electrode plate (3). The air intake assembly (1) is used to inject gas or liquid into the liquid inlet (31), and the air outlet assembly (2) is used to control the discharge speed of the liquid outlet (32).

2. The electrode plate testing device according to claim 1, characterized in that, The upper intake plate (11), the lower intake plate (12), the upper exhaust plate (21), and the lower exhaust plate (22) are each provided with mounting holes (4). The mounting holes (4) are used to install connectors (5). The upper intake plate (11), the lower intake plate (12), the upper exhaust plate (21), and the lower exhaust plate (22) are connected by the connectors (5).

3. The electrode plate testing device according to claim 2, characterized in that, The mounting hole (4) has threads on its inner wall, and the connector (5) is a bolt.

4. The electrode testing device according to claim 2, characterized in that, The electrode plate testing device includes a plurality of mounting holes (4), which are located on both sides of the air inlet (13) and the air outlet (23) along the width direction of the electrode plate testing device.

5. The electrode testing device according to claim 4, characterized in that, The upper intake plate (11) and the upper exhaust plate (21) have protrusions (41), and the lower intake plate (12) and the lower exhaust plate (22) have recesses (42). The protrusions (41) can extend into the recesses (42) to install and position the upper intake plate (11) and the lower intake plate (12), as well as the upper exhaust plate (21) and the lower exhaust plate (22).

6. The electrode testing device according to claim 5, characterized in that, The mounting hole (4) extends through the protrusion (41) and the recess (42) along the thickness direction of the electrode testing device.

7. The electrode testing apparatus according to any one of claims 1 to 6, characterized in that, The outlet (23) has a control valve (24) for controlling the flow rate of the outlet (23).

8. The electrode testing apparatus according to any one of claims 1 to 6, characterized in that, The upper intake plate (11), the lower intake plate (12), the upper exhaust plate (21), and the lower exhaust plate (22) are flat on the side near the electrode plate (3) for contacting the sealing element (33) of the electrode plate (3).

9. The electrode testing apparatus according to any one of claims 1 to 6, characterized in that, The air inlet (13) has an air inlet pipe (14) that protrudes in a direction away from the lower air inlet plate (12).

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