Tool for nondestructively detecting series leakage position of membrane electrode

Abstract

The utility model relates to a tool for non-destructively detecting the series leakage position of a membrane electrode, which is suitable for the membrane electrode and comprises a first air tightness detection plate, a second air tightness detection plate and a fastening part, the membrane electrode is placed between the first airtight detection plate and the second airtight detection plate; the first air tightness detection plate, the membrane electrode and the second air tightness detection plate are all arranged in the fastening part; a first detection cavity is formed in one side, close to the membrane electrode, of the first airtight detection plate, and a second detection cavity is formed in one side, close to the membrane electrode, of the second airtight detection plate; the active area, close to one side of the first airtight detection plate, of the membrane electrode is arranged in the first detection cavity, and the active area, close to one side of the second airtight detection plate, of the membrane electrode is arranged in the second detection cavity; the area, corresponding to the second detection cavity, of the second airtightness detection plate is set to be a transparent area. The area, corresponding to the transparent area, of the fastening part is provided with an observation window. According to the invention, rapid testing of the leakage amount of the membrane electrode string can be realized.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and in particular to a tooling for non-destructive testing of the leakage location of membrane electrode series. Background Technology

[0002] Hydrogen fuel cells are a crucial technology for driving global energy transition and achieving dual-carbon goals. The performance and lifespan of fuel cells largely depend on the performance and lifespan of the membrane electrode assembly (MEA); therefore, in-depth research into MEA failure modes is essential.

[0003] Hydrogen-oxygen cross-leakage is one of the most dangerous failure modes of membrane electrode assemblies (MEAs), causing severe consequences such as abnormal MEA performance, localized overheating and combustion, and even hydrogen leakage and explosion. There are many causes of MEA cross-leakage, and the amount and location of the leakage may vary depending on the cause. Based on the leakage amount and location information, the cause of the cross-leakage can be effectively deduced, providing a strong basis for failure analysis.

[0004] There are many methods and devices for detecting fuel cell string leakage. Existing membrane electrode leakage detection technology can only detect the amount of leakage in the membrane electrode string, but it is difficult to detect and identify specific leakage locations (such as specific leakage locations within the active area of ​​the membrane electrode), especially for membrane electrodes without obvious external damage.

[0005] Currently, common methods for identifying cross-leakage locations include CCM transmission and microscopic observation. These methods all require peeling away the gas diffusion layers on both sides of the CCM before inspection. This method causes some damage to the membrane electrode and cannot guarantee 100% detection of minute cross-leakage locations. Utility Model Content

[0006] Based on this, this utility model provides a tooling and method for non-destructive testing of membrane electrode leakage location, aiming to solve the problems of existing fuel cell leakage detection methods, such as the inability to quickly detect the leakage amount and location of the membrane electrode, and the easy damage to the membrane electrode during the testing process. This application can realize the detection of the leakage amount and location of the membrane electrode while ensuring the integrity of the membrane electrode appearance, without affecting subsequent analysis and testing.

[0007] To achieve the above objectives, in one aspect, the present invention proposes the following technical solution: a tooling for non-destructive testing of the leakage position of a membrane electrode, applicable to membrane electrodes, comprising a first airtightness testing plate (i.e., a base plate), a second airtightness testing plate (i.e., a top plate), and a fastening component; the membrane electrode is placed between the first airtightness testing plate and the second airtightness testing plate; the first airtightness testing plate, the membrane electrode, and the second airtightness testing plate are all disposed within the fastening component;

[0008] The first airtight detection plate has a first detection cavity on the side near the membrane electrode, and the second airtight detection plate has a second detection cavity on the side near the membrane electrode; the active region of the membrane electrode on the side near the first airtight detection plate is disposed in the first detection cavity, and the active region of the membrane electrode on the side near the second airtight detection plate is disposed in the second detection cavity.

[0009] The area of ​​the second airtightness detection plate corresponding to the second detection cavity is set as a transparent area; the area of ​​the fastening component corresponding to the transparent area is set as an observation window.

[0010] In a preferred embodiment, one side of the first airtightness detection plate is provided with a first inlet and a first outlet, which are respectively connected to the first detection chamber. The first inlet and the first outlet allow the detection gas and detection liquid to enter and exit; the first inlet and the first outlet connect inward to the first detection chamber and outward to pipes, valves, and instruments for ventilation and water supply.

[0011] In a preferred embodiment, one side of the second airtightness detection plate is provided with a second inlet and a second outlet, which are respectively connected to the second detection chamber; the second inlet, the second outlet, the first inlet, and the first outlet are arranged on the same side. The second inlet and the second outlet allow for the introduction and discharge of detection gas and detection liquid; the second inlet and the second outlet connect inward to the second detection chamber and outward to pipes, valves, and instruments for ventilation and water supply.

[0012] In a preferred embodiment, the depth of the first detection chamber is 0.5 mm to 5 mm; the depth of the second detection chamber is 0.5 mm to 5 mm. By providing the first and second detection chambers, they can be used to store the detection gas and the detection liquid.

[0013] In a preferred embodiment, the transparent area is a transparent acrylic sheet or a transparent PC sheet. The membrane electrode can be clearly observed through the observation window and the transparent area.

[0014] In a preferred embodiment, a first sealing groove is provided on the side of the first airtightness testing plate near the second airtightness testing plate; a second sealing groove is provided on the side of the second airtightness testing plate near the first airtightness testing plate; the first sealing groove and the second sealing groove are arranged opposite to each other, and the first sealing groove and the second sealing groove have the same size.

[0015] In a preferred embodiment, sealant is provided in both the first and second sealing grooves, and the sealant abuts against the membrane electrode. The sealant is applied by means of a sealing ring, a sealing gasket, or dispensing. The first and second sealing grooves and the sealant together achieve a seal between the first and second airtightness detection plates and the membrane electrode. The area between the outer edge of the membrane electrode GDL (gas diffusion layer) and the edge of the frame is the sealing area, and the area within the sealing ring is the airtightness detection area. The airtightness detection area is located inside the sealing area, and the observation window covers the entire airtightness detection area.

[0016] In a preferred embodiment, the first airtightness detection plate and the membrane electrode, and the first airtightness detection plate and the second airtightness detection plate are fixedly connected by internal positioning, external positioning or mixed positioning.

[0017] In a preferred embodiment, when the first airtightness detection plate and the membrane electrode, and the first airtightness detection plate and the second airtightness detection plate are fixedly connected by internal positioning, a protrusion is provided on the side of the first airtightness detection plate near the membrane electrode, and a recess is provided on the side of the second airtightness detection plate near the membrane electrode, and the protrusion is engaged in the recess; the end of the membrane electrode near the protrusion abuts against the protrusion.

[0018] In a preferred embodiment, the protrusion is disposed on the outer side of the first sealing groove; the protrusion is adapted to the recess; and the protrusion is integrally formed with the first airtightness detection plate. This arrangement ensures both mutual sealing and effectively saves space consumed by fixing, and is easy to assemble and disassemble.

[0019] In a preferred embodiment, the fastening components are used to fix the first and second airtightness testing plates by means of cylinder pressure fastening, screw fixing, strap fixing, quick clamp fixing, or external press fixing.

[0020] In a preferred embodiment, when the fastening component fixes the first airtightness detection plate and the second airtightness detection plate by means of cylinder pressurization, the pressure of the cylinder pressurization is 0.1MPa to 5MPa.

[0021] In a preferred embodiment, the fastening component includes a first fastening plate, a second fastening plate, and a plurality of fastening screws; the first fastening plate is disposed in abutment against the first airtightness detection plate, and the second fastening plate is disposed in abutment against the second airtightness detection plate; the plurality of fastening screws are evenly disposed on the outer side of the first airtightness detection plate (second airtightness detection plate); one end of each fastening screw is connected to the first fastening plate, and the other end is connected to the second fastening plate.

[0022] In a preferred embodiment, the observation window is disposed on the second fastening plate; a sliding rod is disposed within the observation window, and the sliding rod is slidably connected to the side of the observation window. By providing the sliding rod, the strength of the second airtightness detection plate can be enhanced, facilitating flexible observation. In this embodiment, two sliding rods are provided, and the two sliding rods are arranged parallel to each other.

[0023] In a preferred embodiment, the tooling for detecting leakage at the non-destructive testing membrane electrode has a temperature resistance range of -10℃ to 120℃. In this embodiment, the airtightness testing plate, sealant, and other components of the tooling are all made of heat-resistant materials, effectively ensuring that the temperature resistance range of the tooling is -10℃ to 120℃.

[0024] On the other hand, embodiments of this application also provide a method for non-destructive testing of the leakage location of a membrane electrode, the method being implemented using a tooling for non-destructive testing of the leakage location of the membrane electrode.

[0025] The beneficial effects achieved by this utility model are as follows: The structure of this application enables rapid testing of membrane electrode leakage, and is compatible with both flow rate and pressure holding methods. This application can simulate high and low temperature environments, enabling the detection of membrane electrode leakage location and leakage amount within the range of 1℃ to 99℃. The structure of this application is applicable to membrane electrodes of any active area, causing no external or structural damage to the membrane electrode, and can quickly identify the leakage location. This application has a simple structure, is easy to assemble and disassemble, facilitates maintenance, effectively extends battery life, and has high practicality and economy. It has a wide range of applications and can be used as a general-purpose product in production and use. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0027] Figure 1 This is a schematic diagram of the overall structure of a tooling for non-destructive testing of the leakage position of a membrane electrode according to an embodiment of the present invention.

[0028] Figure 2 for Figure 1 A top view of the fixture for non-destructive testing of membrane electrode leakage locations;

[0029] Figure 3 for Figure 1 A partial structural diagram of a tooling for non-destructive testing of membrane electrode leakage locations;

[0030] Figure 4 for Figure 3 A cross-sectional schematic diagram of the core structure of the structure (not to scale).

[0031] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0032] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0033] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, top, bottom, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0034] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0035] It should be noted that when a component is described as "fixed to" or "set on" another component, it can be directly on the other component or there may be an intervening component. When a component is described as "connected to" another component, it can be directly connected to the other component or there may be an intervening component.

[0036] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of indicated technical features. Therefore, features defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. If the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0037] The structure described in this application enables the testing of membrane electrode leakage and the detection of membrane electrode leakage location, while ensuring the integrity of the membrane electrode appearance and not affecting subsequent analysis and testing.

[0038] Specifically, such as Figures 1 to 3 As shown, in one aspect, the present invention proposes the following technical solution: a tooling for non-destructive testing of the leakage position of a membrane electrode, applicable to a membrane electrode 100, comprising a first airtightness testing plate 10 (i.e., a base plate), a second airtightness testing plate 20 (i.e., a top plate), and a fastening component 30; the membrane electrode 100 is placed between the first airtightness testing plate 10 and the second airtightness testing plate 20; the first airtightness testing plate 10, the membrane electrode 100, and the second airtightness testing plate 20 are all disposed within the fastening component 30;

[0039] The first airtightness detection plate 10 has a first detection cavity 11 on the side near the membrane electrode 100, and the second airtightness detection plate 20 has a second detection cavity 21 on the side near the membrane electrode 100; the active area of ​​the membrane electrode 100 on the side near the first airtightness detection plate 10 is disposed in the first detection cavity 11, and the active area of ​​the membrane electrode 100 on the side near the second airtightness detection plate 20 is disposed in the second detection cavity 21.

[0040] The area of ​​the second airtightness detection plate 20 corresponding to the second detection cavity 21 is set as a transparent area; the area of ​​the fastening component 30 corresponding to the transparent area is set as an observation window 31.

[0041] In a preferred embodiment, one side of the first airtightness detection plate 10 is provided with a first inlet 12 and a first outlet 13, which are respectively connected to the first detection chamber 11. The first inlet 12 and the first outlet 13 allow the introduction and discharge of detection gas and detection liquid; the first inlet 12 and the first outlet 13 are internally connected to the first detection chamber 11 and externally connected to air and water pipes, valves, and instruments.

[0042] In a preferred embodiment, one side of the second airtightness detection plate 20 is provided with a second inlet 22 and a second outlet 23, which are respectively connected to the second detection chamber 21; the second inlet 22, the second outlet 23, the first inlet 12, and the first outlet 13 are arranged on the same side. The second inlet 22 and the second outlet 23 allow the detection gas and detection liquid to enter and exit; the second inlet 22 and the second outlet 23 are internally connected to the second detection chamber 21 and externally connected to air and water pipes, valves, and instruments.

[0043] In a preferred embodiment, the depth of the first detection cavity 11 is 0.5 mm to 5 mm; the depth of the second detection cavity 21 is 0.5 mm to 5 mm. By providing the first detection cavity 11 and the second detection cavity 21, they can be used to store the detection gas and the detection liquid.

[0044] In a preferred embodiment, the transparent area is a transparent acrylic sheet or a transparent PC sheet. The membrane electrode can be clearly observed through the observation window and the transparent area.

[0045] In a preferred embodiment, the first airtightness testing plate 10 is provided with a first sealing groove 14 on the side near the second airtightness testing plate 20; the second airtightness testing plate 20 is provided with a second sealing groove 24 on the side near the first airtightness testing plate 10; the first sealing groove 14 and the second sealing groove 24 are arranged opposite to each other, and the first sealing groove 14 and the second sealing groove 24 have the same size.

[0046] In a preferred embodiment, sealant 40 is provided in both the first sealing groove 14 and the second sealing groove 24, and the sealant 40 abuts against the membrane electrode 30. The sealant 40 is applied by means of sealing rings, sealing gaskets, or dispensing. The first sealing groove 14, the second sealing groove 24, and the sealant 40 achieve sealing between the first airtightness detection plate 10, the second airtightness detection plate 20, and the membrane electrode 100. The area between the outer edge of the membrane electrode GDL (gas diffusion layer) and the edge of the frame is the sealing area, and the area inside the sealing ring is the airtightness detection area. The airtightness detection area is located inside the sealing area, and the observation window covers the entire airtightness detection area.

[0047] In a preferred embodiment, the first airtightness detection plate 10 and the membrane electrode 100, and the first airtightness detection plate 10 and the second airtightness detection plate 20 are fixedly connected by internal positioning, external positioning or mixed positioning.

[0048] As a preferred embodiment, in the embodiments of this application, such as Figure 4As shown, when the first airtightness detection plate 10 and the membrane electrode 100, and the first airtightness detection plate 10 and the second airtightness detection plate 20 are fixedly connected by internal positioning, a protrusion 15 is provided on the side of the first airtightness detection plate 10 near the membrane electrode, and a recess 25 is provided on the side of the second airtightness detection plate 20 near the membrane electrode 100. The protrusion 15 is engaged in the recess 25; the end of the membrane electrode 100 near the protrusion 15 abuts against the protrusion 15. The protrusion and the recess are interference-fitted to ensure good sealing between them.

[0049] In a preferred embodiment, the protrusion 15 is disposed on the outer side of the first sealing groove 14; the protrusion 15 is adapted to the recess 25; the protrusion 15 is integrally formed with the first airtightness detection plate 10. The distance between the inner edge of the sealing groove and the outer edge of the GDL (gas diffusion layer) is 1 mm. This arrangement ensures the sealing performance between them, effectively saves space consumed by fixing, and is easy to disassemble and assemble.

[0050] In a preferred embodiment, the fastening component 30 secures the first airtightness detection plate 10 and the second airtightness detection plate 20 by means of cylinder pressure fastening, screw fixing, strap fixing, quick clamp fixing or external press fixing.

[0051] In a preferred embodiment, when the fastening component 30 fixes the first airtightness detection plate 10 and the second airtightness detection plate 20 by means of cylinder pressurization, the pressure of the cylinder pressurization is 0.1MPa to 5MPa (it can be 0.1MPa, 0.5MPa, 1.0MPa, 1.5MPa, 3MPa, 5MPa, etc., depending on the actual needs of use).

[0052] In a preferred embodiment, the fastening component 30 includes a first fastening plate 32, a second fastening plate 33, and a plurality of fastening screws 34; the first fastening plate 32 is disposed in abutment with the first airtightness detection plate 10, and the second fastening plate 33 is disposed in abutment with the second airtightness detection plate 20; the plurality of fastening screws 34 are evenly disposed on the outer side of the first airtightness detection plate 10 (second airtightness detection plate); one end of each fastening screw 34 is connected to the first fastening plate 32, and the other end is connected to the second fastening plate 33.

[0053] In a preferred embodiment, the observation window 31 is disposed on the second fastening plate 33; a sliding rod 311 is disposed within the observation window 31, and the sliding rod 311 is slidably connected to the side of the observation window 31. By providing the sliding rod 311, the strength of the second airtightness detection plate 20 can be enhanced, facilitating flexible observation. In this embodiment, two sliding rods 311 are provided, and the two sliding rods 311 are arranged parallel to each other.

[0054] In a preferred embodiment, the tooling for detecting leakage at the non-destructive testing membrane electrode has a temperature resistance range of -10℃ to 120℃. In this embodiment, the airtightness testing plate, sealant, and other components of the tooling are all made of heat-resistant materials, effectively ensuring that the temperature resistance range of the tooling is -10℃ to 120℃. Within this temperature range, all components can maintain their original physical and chemical properties and will not experience failure modes such as cracking or hardening.

[0055] A flow meter and a valve are installed on the inlet pipe of the first airtightness testing plate; a valve is installed on the outlet pipe of the first airtightness testing plate; a three-way valve is installed on the inlet pipe of the second airtightness testing plate, and the three-way valve is connected to the inlet, funnel and pressure gauge of the second airtightness testing plate respectively; a valve is installed on the outlet pipe of the second airtightness testing plate.

[0056] On the other hand, embodiments of this application also provide a method for non-destructive testing of the leakage location of a membrane electrode, the method being implemented using a tooling for non-destructive testing of the leakage location of the membrane electrode.

[0057] The method for non-destructive testing of membrane electrodes using the aforementioned fixture for detecting leakage locations specifically includes the following steps:

[0058] (a) Non-destructive testing of membrane electrode series leakage:

[0059] The fixture for non-destructive testing of membrane electrode leakage locations provided in this application can be used for detecting leakage in conventional membrane electrodes, and is applicable to both flow rate and pressure holding methods. During the testing process, it can be equipped with an airtightness testing station or pressure gauges as needed.

[0060] During leakage testing, the membrane electrode is first positioned on the first airtightness testing plate, then the second airtightness testing plate is placed on top, and the first and second airtightness testing plates are pressed together using fastening components. The applied pressure can be set based on experience and subsequent testing requirements.

[0061] Depending on the test direction requirements (e.g., leakage from cathode to anode or leakage from anode to cathode), select one of the first or second airtightness testing plates. Introduce a test gas into the inlet, typically air, nitrogen, argon, helium, or a helium-nitrogen mixture, while simultaneously closing the outlet valve of that testing plate. According to the test requirements, maintain the pressure within the testing chamber on the vented side of the membrane electrode at a stable value between 20 kPa and 3 MPa. The testing chamber on the other side of the membrane electrode is connected to the atmosphere.

[0062] The leakage of the membrane electrode is detected according to the testing requirements of the flow rate method or the pressure holding method.

[0063] For example, 1.1, detection of leakage from the top to the bottom of the membrane electrode:

[0064] (1) Position the membrane electrode on the first airtightness detection plate, cover it with the second airtightness detection plate, and use fastening components to pressurize and fasten the first airtightness detection plate and the second airtightness detection plate together. Introduce high-pressure gas into the cylinder of the fastening components so that the pressure applied to the airtightness detection plate is constant at 1.5MPa±0.1MPa.

[0065] (2) Close the outlet valve of the second airtightness test plate, and connect the three-way valve on the inlet pipeline of the second airtightness test plate to the inlet of the second airtightness test plate and the pressure gauge. Introduce air into the inlet of the second airtightness test plate to make the pressure in the second test chamber reach 50 kPa.

[0066] (3) If the flow rate method is used to detect leakage, the pressure in the second detection chamber should be maintained at 50 kPa throughout the test. Close the outlet valve of the first airtightness detection plate, and use a flow meter at the inlet of the first airtightness detection plate to measure the gas flow rate from the inlet. The outlet of the flow meter is connected to the atmosphere. After the reading stabilizes, read the gas flow rate from the first airtightness detection plate, which is the leakage of the membrane electrode.

[0067] (4) If the pressure holding method is used to detect leakage, open the valves at the inlet and outlet of the first airtightness detection plate to connect the first detection chamber to the atmosphere. After the pressure in the second detection chamber reaches 50 kPa, stop the gas supply, close the valves at the inlet and outlet of the second airtightness detection plate, and start recording the time and pressure changes in the second detection chamber. After 20 minutes, the difference between the remaining pressure in the second detection chamber and 50 kPa is the leakage of the membrane electrode.

[0068] 1.2 Detection of leakage from the bottom to the top of the membrane electrode:

[0069] Introduce 50 kPa gas into the first airtightness testing plate, connect the second airtightness testing plate to the atmosphere, and perform other operations similar to 1.1.

[0070] (II) Non-destructive testing of membrane electrode leakage locations:

[0071] When detecting leakage points, first position the membrane electrode on the first airtightness detection plate, then cover it with the second airtightness detection plate, and use fastening components to pressurize and secure the first and second airtightness detection plates together. The applied pressure can be set based on experience and subsequent testing requirements (e.g., 1.5MPa ± 0.1MPa).

[0072] The three-way valve on the inlet pipe of the second airtightness detection plate connects the inlet of the second airtightness detection plate to the funnel. Open the outlet valve of the second airtightness detection plate. Introduce deionized water at a certain temperature into the second airtightness detection plate from the funnel. The temperature range of the deionized water is 1℃~99℃ (e.g., 25℃). Ensure that the second detection chamber is completely filled with deionized water.

[0073] A detection gas at a certain pressure is introduced into the first airtightness detection plate. This gas is typically air, nitrogen, argon, helium, or a helium-nitrogen mixture. Simultaneously, the outlet valve of the first airtightness detection plate is closed. According to the testing requirements, the pressure inside the first detection chamber is maintained at a stable value between 20 kPa and 3 MPa (e.g., 50 kPa).

[0074] The pressure inside the first detection chamber is maintained for a period of time. At the same time, the presence of air bubbles is observed through the observation window and the transparent area to see if any bubbles are formed on the membrane electrode in the detection area. The location and speed of bubble formation are recorded to analyze and determine the location and rate of leakage of the membrane electrode.

[0075] If a flow meter is connected to the inlet of the first airtightness detection plate, the leakage of the membrane electrode can be measured at the same time as detecting the leakage location.

[0076] This application's structure enables rapid testing of membrane electrode leakage, and is compatible with both flow rate and pressure holding methods. It can simulate high and low temperature environments, detecting the location and amount of membrane electrode leakage within a temperature range of 1℃ to 99℃. The structure is applicable to membrane electrodes of any active area, causing no visible or structural damage, and allows for rapid identification of leakage locations. This application's simple structure facilitates assembly and disassembly, simplifying maintenance and effectively extending battery life. It offers high practicality and economy, has a wide range of applications, and can be used as a general-purpose product in production and application.

[0077] In the description of this specification, references to terms such as "an embodiment," "example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example.

[0078] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style of the specification is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0079] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A tooling for non-destructive testing of the leakage location of a membrane electrode, characterized in that, Applicable to membrane electrodes, including a first airtightness detection plate, a second airtightness detection plate, and a fastening component; the membrane electrode is placed between the first airtightness detection plate and the second airtightness detection plate; the first airtightness detection plate, the membrane electrode, and the second airtightness detection plate are all disposed within the fastening component; The first airtight detection plate has a first detection cavity on the side near the membrane electrode, and the second airtight detection plate has a second detection cavity on the side near the membrane electrode; the active region of the membrane electrode on the side near the first airtight detection plate is disposed in the first detection cavity, and the active region of the membrane electrode on the side near the second airtight detection plate is disposed in the second detection cavity. The area of ​​the second airtightness detection plate corresponding to the second detection cavity is set as a transparent area; the area of ​​the fastening component corresponding to the transparent area is set as an observation window.

2. The tooling for non-destructive testing of the leakage location of membrane electrodes according to claim 1, characterized in that, One side of the first airtightness detection plate is provided with a first inlet and a first outlet, and the first inlet and the first outlet are respectively connected to the first detection cavity; The second airtightness detection plate has a second inlet and a second outlet on one side, and the second inlet and the second outlet are respectively connected to the second detection cavity; the second inlet, the second outlet, the first inlet and the first outlet are located on the same side.

3. The tooling for non-destructive testing of the leakage location of membrane electrodes according to claim 1, characterized in that, The depth of the first detection cavity is 0.5mm to 5mm; the depth of the second detection cavity is 0.5mm to 5mm. The transparent area is a transparent acrylic sheet or a transparent PC sheet; The first airtightness testing plate has a first sealing groove on its side near the second airtightness testing plate; the second airtightness testing plate has a second sealing groove on its side near the first airtightness testing plate; the first sealing groove and the second sealing groove are arranged opposite to each other, and the first sealing groove and the second sealing groove have the same size.

4. The tooling for non-destructive testing of the leakage location of membrane electrodes according to claim 3, characterized in that, Both the first sealing groove and the second sealing groove are provided with sealant, which is in contact with the membrane electrode; the sealant is applied by means of sealing rings, sealing gaskets, or dispensing.

5. The tooling for non-destructive testing of the leakage location of membrane electrodes according to claim 3, characterized in that, The first airtightness detection plate and the membrane electrode, and the first airtightness detection plate and the second airtightness detection plate are fixedly connected by internal positioning, external positioning or mixed positioning.

6. The tooling for non-destructive testing of the leakage location of membrane electrodes according to claim 5, characterized in that, When the first airtightness detection plate and the membrane electrode, and the first airtightness detection plate and the second airtightness detection plate are fixedly connected by internal positioning, a protrusion is provided on the side of the first airtightness detection plate near the membrane electrode, and a recess is provided on the side of the second airtightness detection plate near the membrane electrode, and the protrusion is engaged in the recess; the end of the membrane electrode near the protrusion abuts against the protrusion.

7. The tooling for non-destructive testing of the leakage location of a membrane electrode according to claim 6, characterized in that, The protrusion is disposed on the outside of the first sealing groove; the protrusion is adapted to the concave hole; the protrusion is integrally formed with the first airtightness detection plate.

8. The tooling for non-destructive testing of the leakage location of membrane electrodes according to claim 1, characterized in that, The fastening components are used to fix the first and second airtightness testing plates by means of cylinder pressure fastening, screw fixing, strap fixing, quick clamp fixing or external press fixing. When the fastening component fixes the first airtightness detection plate and the second airtightness detection plate by means of cylinder pressurization, the pressure of the cylinder pressurization is 0.1MPa to 5MPa.

9. The tooling for non-destructive testing of the leakage location of a membrane electrode according to claim 1, characterized in that, The fastening components include a first fastening plate, a second fastening plate, and several fastening screws; the first fastening plate is abutting against the first airtightness detection plate, and the second fastening plate is abutting against the second airtightness detection plate; the several fastening screws are evenly arranged on the outer side of the first airtightness detection plate; one end of each fastening screw is connected to the first fastening plate, and the other end is connected to the second fastening plate.

10. The tooling for non-destructive testing of the leakage location of a membrane electrode according to claim 9, characterized in that, The observation window is disposed on the second fastening plate; a sliding rod is disposed inside the observation window, and the sliding rod is slidably connected to the side of the observation window.

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