Aging device for fuel cell gas diffusion layers

Abstract

The application belongs to the technical field of fuel cell aging test, and particularly relates to an aging device for a fuel cell gas diffusion layer. The aging device for the fuel cell gas diffusion layer comprises an aging container and a support frame. The aging container has an aging cavity for loading an aging reagent. The support frame is arranged in the aging cavity and comprises a frame body and at least two blocking pieces. Each blocking piece is arranged in the height direction of the frame body and connected with the frame body. An accommodating space for accommodating the gas diffusion layer is formed between the adjacent two blocking pieces, and the height of the accommodating space is greater than the thickness of the gas diffusion layer. The upper blocking piece among the adjacent two blocking pieces is used for abutting against the edge of the gas diffusion layer to block the gas diffusion layer from floating out of the liquid surface of the aging reagent. In this way, the gas diffusion layer can be immersed in the aging reagent, and the upper and lower surfaces of the gas diffusion layer can fully contact with the aging reagent, so that the aging efficiency of the gas diffusion layer is greatly improved.

Description

Technical Field

[0001] This application belongs to the field of fuel cell aging testing technology, and in particular relates to an aging device for a fuel cell gas diffusion layer. Background Technology

[0002] To study the chemical degradation mechanism of the gas diffusion layer in fuel cells, it is necessary to accelerate the aging of the gas diffusion layer. This is usually done by placing the gas diffusion layer in a container filled with aging reagents for chemical immersion and corrosion.

[0003] During operation, the gas diffusion layer is often directly immersed in the aging reagent. However, because the density of the gas diffusion layer is less than that of the aging reagent, it floats on the surface of the reagent, preventing sufficient contact. Alternatively, a clamping block or similar component can be used to press the gas diffusion layer firmly against the bottom of the container. While this method ensures complete immersion, the surface of the gas diffusion layer in contact with the container bottom cannot achieve adequate contact with the aging reagent. This lack of sufficient contact leads to poor aging effect and low aging efficiency. Summary of the Invention

[0004] The purpose of this application is to provide an aging device for the gas diffusion layer of a proton exchange membrane fuel cell, which aims to solve the technical problem in the prior art that the gas diffusion layer cannot fully contact the aging reagent during accelerated aging, resulting in poor aging effect and low aging efficiency of the gas diffusion layer.

[0005] To achieve the above objectives, the technical solution adopted in this application is: an aging device for a proton exchange membrane fuel cell gas diffusion layer, comprising an aging container and a support frame. The aging container has an aging chamber for loading aging reagents. The support frame is disposed within the aging chamber and includes a frame body and at least two blocking members. Each blocking member is spaced apart along the height direction of the frame body and connected to the frame body. A receiving space for accommodating the gas diffusion layer is formed between two adjacent blocking members, and the height of the receiving space is greater than the thickness of the gas diffusion layer. The upper blocking member among the two adjacent blocking members is used to abut against the edge of the gas diffusion layer to prevent the gas diffusion layer from floating out of the aging reagents.

[0006] Furthermore, the blocking element is a blocking frame, which is used to abut against the periphery of the gas diffusion layer.

[0007] Furthermore, the blocking frame includes at least three frame strips, which are connected end to end in sequence.

[0008] Furthermore, there are four frame strips, which are divided into a first frame strip, a second frame strip, a third frame strip, and a fourth frame strip connected end to end in sequence. The first frame strip and the third frame strip are arranged in parallel and spaced apart, and the second frame strip and the fourth frame strip are arranged in parallel and spaced apart. The frame includes two connecting plates, which are arranged at intervals. The surfaces of the two connecting plates that face each other are connected to the first frame strip and the third frame strip, respectively.

[0009] Furthermore, the support frame is an acrylic bracket.

[0010] Furthermore, the aging container includes a sealing cap and a body with an opening. The sealing cap is placed over the opening of the body and seals the opening of the body, and the sealing cap and the body together form an aging chamber.

[0011] Furthermore, the aging device for the fuel cell gas diffusion layer also includes a condenser tube, and the sealing cap is provided with a connection hole communicating with the aging chamber, with the condenser tube communicating with the connection hole.

[0012] Furthermore, the sealing cap is provided with an air inlet for communication with an external air duct.

[0013] Furthermore, the aging device for the fuel cell gas diffusion layer also includes a sealing ring, and the fuel cell body and the sealing cover are sealed together by the sealing ring.

[0014] Furthermore, the aging device for the fuel cell gas diffusion layer also includes a sealing clip, and a flange is provided at the end of the body near the opening, with the sealing clip clamping the flange and the edge of the sealing cap.

[0015] The above-mentioned technical solutions of one or more of the fuel cell gas diffusion layer aging devices provided in this application have at least one of the following technical effects: The gas diffusion layer is placed in the receiving space formed between two adjacent blocking members on the support frame. Then, aging reagent is injected into the aging chamber, and the aging reagent flows into the receiving space. Because the density of the gas diffusion layer is less than the density of the aging reagent, and the height of the receiving space is greater than the thickness of the gas diffusion layer, the gas diffusion layer can float upwards within the receiving space. When the aging reagent fills the entire receiving space, the edge of the gas diffusion layer abuts against the upper blocking member. Thus, as the liquid level of the aging reagent continues to rise, the gas diffusion layer can remain within the receiving space and be submerged in the aging reagent due to the obstruction of the upper blocking member, without floating to the surface of the aging reagent. Furthermore, since the gas diffusion layer abuts against the blocking member at the edge, it can ensure that both the upper and lower surfaces of the gas diffusion layer can fully contact the aging reagent, thereby greatly improving the aging efficiency of the gas diffusion layer. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application, 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 application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a structural diagram of an aging device for a fuel cell gas diffusion layer provided in an embodiment of this application.

[0018] Figure 2 for Figure 1 The diagram shows a perspective view of the aging device for the fuel cell gas diffusion layer.

[0019] Figure 3 for Figure 2 The diagram shows the structure of the support frame for the aging device of the fuel cell gas diffusion layer.

[0020] Figure 4 for Figure 3 The diagram shows the structure of the support frame from another angle.

[0021] The following are the labeling elements in the figure:

[0022] 10. Aging container; 20. Support frame; 30. Condenser; 40. Sealing ring;

[0023] 11. Sealing cap; 12. Body; 101. Aging chamber;

[0024] 111. Connecting hole; 112. Air inlet;

[0025] 121, Flange; 1211, Mounting slot;

[0026] 21. Frame; 22. Blocking components; 23. Accommodation space;

[0027] 211. Connecting plate; 2111. Handle hole;

[0028] 221. Blocking frame; 2211. Frame strip; 2212. Cutout area;

[0029] 22111, First frame; 22112, Second frame; 22113, Third frame; 22114, Fourth frame. Detailed Implementation

[0030] The embodiments of this application are described in detail below, with examples of the embodiments provided in the appendix. Figures 1-4As shown, the same or similar reference numerals throughout denote the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application.

[0031] In the description of this application, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0032] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0033] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," 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. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0034] This application provides an aging device for a fuel cell gas diffusion layer, such as... Figures 1 to 3 As shown, the aging device for the gas diffusion layer of a fuel cell includes an aging container 10 and a support frame 20. The aging container 10 has an aging chamber 101 for loading aging reagents. The support frame 20 is disposed in the aging chamber 101. The support frame 20 includes a frame body 21 and at least two blocking members 22. Each blocking member 22 is spaced apart along the height direction of the frame body 21 and connected to the frame body 21. A receiving space 23 for accommodating the gas diffusion layer is formed between two adjacent blocking members 22, and the height of the receiving space 23 is greater than the thickness of the gas diffusion layer. Among the two adjacent blocking members 22, the upper blocking member 22 is used to abut against the edge of the gas diffusion layer to prevent the gas diffusion layer from floating out of the aging reagents.

[0035] In this embodiment, the gas diffusion layer is placed into the receiving space 23 formed between two adjacent blocking members 22 on the support frame 20. Then, aging reagent is injected into the aging chamber 101, flowing into the receiving space 23. Because the density of the gas diffusion layer is less than that of the aging reagent, and the height of the receiving space 23 is greater than the thickness of the gas diffusion layer, the gas diffusion layer can float upwards within the receiving space 23. When the aging reagent fills the entire receiving space 23, the edge of the gas diffusion layer comes into contact with the upper blocking member 22. Thus, as the liquid level of the aging reagent continues to rise, the gas diffusion layer remains within the receiving space 23 and is submerged in the aging reagent due to the obstruction of the upper blocking member 22, preventing it from floating to the surface of the aging reagent. Furthermore, since the contact point between the gas diffusion layer and the blocking member 22 is at the edge, it ensures that both the upper and lower surfaces of the gas diffusion layer are in full contact with the aging reagent, thereby greatly improving the aging efficiency of the gas diffusion layer.

[0036] Since the height of the containment space 23 is greater than the thickness of the gas diffusion layer, the containment space 23 can contain both the gas diffusion layer and the aging reagent. It should be understood that the containment space 23 is connected to the aging chamber 101, meaning that the aging reagent in the aging chamber 101 can flow into the containment space 23, specifically through the gap between two adjacent baffles 22 or through the interior of the baffles 22. Before injecting the aging reagent, the gas diffusion layer is placed in the containment space 23 formed between the two adjacent baffles 22, and positioned on the lower baffle 22. When the aging reagent is injected into the aging chamber 101, the aging reagent flows into the containment space 23. Due to density, the gas diffusion layer floats upward and separates from the lower baffle 22. Thus, the aging reagent in the containment space 23 can fully contact the lower surface of the gas diffusion layer. As the aging reagent continues to be injected, the gas diffusion layer will continue to float upwards within the containing space 23 until its edge comes into contact with the upper-positioned blocking member 22. Afterwards, the gas diffusion layer will remain at the same height and will not continue to float, thus ensuring that the gas diffusion layer is submerged in the aging reagent. In terms of design, while using the blocking member 22 to prevent the gas diffusion layer from floating upwards, the contact area between the blocking member 22 and the gas diffusion layer should be minimized as much as possible so that the upper surface of the gas diffusion layer can fully contact the aging reagent. In this embodiment, the upper-positioned blocking member 22 is positioned corresponding to the edge of the gas diffusion layer. Here, the edge of the gas diffusion layer refers to either the side surface of the gas diffusion layer or the periphery of its upper surface. The former allows the upper surface of the gas diffusion layer to be in complete contact with the aging reagent, while the latter allows most of the upper surface of the gas diffusion layer to be in contact with the aging reagent, while also providing better fixation of the gas diffusion layer and effectively preventing it from floating upwards.

[0037] In this embodiment, the number of blocking members 22 can be two, three, four, five, or more, and the corresponding number of accommodating spaces 23 can be one, two, three, four, or more. The specific number can be selected according to actual needs. For example, the number of blocking members 22 is three, and the three blocking members 22 are spaced apart along the height direction of the frame 21. An accommodating space 23 is formed between the upper blocking member 22 and the middle blocking member 22, and an accommodating space 23 is also formed between the middle blocking member 22 and the lower blocking member 22. The upper and middle blocking members 22 are positioned at the top and bottom, respectively. The upper blocking member 22 abuts against the edge of the gas diffusion layer to prevent it from floating above the surface of the aging reagent. Similarly, the middle and lower blocking members 22 are positioned at the top and bottom, respectively. The upper middle blocking member 22 abuts against the edge of the gas diffusion layer to prevent it from floating above the surface of the aging reagent. The aging device for fuel cell gas diffusion layers provided in this embodiment allows for the simultaneous aging of multiple gas diffusion layers by using multiple spaced blocking members 22, significantly improving the aging efficiency for batches of gas diffusion layers and preventing adhesion between the gas diffusion layers. Furthermore, during operation, gas diffusion layers can be removed at different times to obtain gas diffusion layers with different degrees of aging.

[0038] In this embodiment, the support frame 20 and the aging container 10 can be integrally formed or be separate structures. Preferably, the support frame 20 and the aging container 10 are separate structures, which facilitates separate cleaning of the support frame 20 and the aging container 10, and also facilitates the placement and removal of the gas diffusion layer on the support frame 20. During the experiment, the gas diffusion layer is first placed into the receiving space 23 formed between two adjacent blocking members 22 on the support frame 20, and then the support frame 20 together with the gas diffusion layer is placed into the aging chamber 101 of the aging container 10. Subsequently, aging reagents can be injected into the aging chamber 101 to age the gas diffusion layer. When it is necessary to remove the gas diffusion layer, the support frame 20 is first removed from the aging chamber 101, and then the gas diffusion layer can be easily removed. The support frame 20 can be placed directly on the bottom surface of the aging container 10, or it can be fixed to the bottom or side surface of the aging container 10 by means of snap-fit, screw-fit, or plug-in.

[0039] In this embodiment, the frame 21 provides support for each blocking element 22 and spaces them apart. The frame 21 and the blocking elements 22 can be fixedly connected; preferably, the frame 21 and the blocking elements 22 are integrally formed, offering advantages such as simple and robust structure. Alternatively, the blocking elements 22 can be movably connected to the frame 21, specifically moving along the height of the frame 21. This allows adjustment of the spacing between adjacent blocking elements 22, i.e., the height of the accommodating space 23, to accommodate gas diffusion layers of different thicknesses.

[0040] In this embodiment, the aging effect of the aging agent on the gas diffusion layer refers to the corrosion of the gas diffusion layer by the aging agent, which reduces the mechanical properties and hydrophobicity of the gas diffusion layer, leading to a decrease in the supporting effect of the gas diffusion layer and failure of water management. The aging agent can be a corrosive solution such as dilute sulfuric acid or hydrogen peroxide. The aging container 10 is made of a corrosion-resistant material; preferably, it is made of quartz, which has advantages such as high temperature resistance, acid and alkali resistance, and easy cleaning, thereby ensuring that the aging container 10 has good reliability and service life.

[0041] In another embodiment of this application, such as Figures 2 to 4 As shown, the blocking component 22 of the aging device for the fuel cell gas diffusion layer is a blocking frame 221, which is used to abut against the periphery of the gas diffusion layer. On the one hand, the blocking frame 221 abuts against the periphery of the gas diffusion layer, and the blocking frame 221 has good blocking stability for the gas diffusion layer, making it difficult for the gas diffusion layer to float out of the aging reagent, ensuring that the gas diffusion layer can be completely and stably immersed in the aging reagent. In addition, the blocking frame 221 abuts against the periphery of the gas diffusion layer, so that the gas diffusion layer is subjected to uniform force and is in a flat state, avoiding phenomena such as edge flipping or curling of the gas diffusion layer due to uneven force, which is conducive to the full contact between the gas diffusion layer and the aging reagent, thereby improving the aging efficiency. On the other hand, the blocking component 22 adopts a frame structure, so the hollow area 2212 formed in the blocking frame 221 will allow the gas diffusion layer to be fully exposed and in contact with the aging reagent, increasing the contact area between the aging reagent and the gas diffusion layer, and improving the aging efficiency.

[0042] In another embodiment of this application, such as Figure 4As shown, the blocking frame 221 of the aging device for the fuel cell gas diffusion layer includes at least three frame strips 2211, which are connected end to end in sequence. Specifically, the number of frame strips 2211 can be three, four, or more than five, and the specific number can be selected according to actual needs, which is not limited here. In addition, each frame strip 2211 abuts against the edge of the gas diffusion layer. On the one hand, it can prevent the gas diffusion layer from floating upward. On the other hand, the hollow area 2212 formed by each frame strip 2211 allows the gas diffusion layer, except for the edge, to be completely exposed and in contact with the aging reagent. This further increases the contact area between the aging reagent and the gas diffusion layer, thereby improving the aging efficiency. In specific applications, the shape of the blocking frame 221 needs to be adapted to the peripheral shape of the gas diffusion layer to ensure that it can stably prevent the gas diffusion layer from floating upward.

[0043] In one embodiment, the blocking frame 221 can be a triangular frame, a square frame, a rectangular frame, a pentagonal frame, or other polygonal frame structures. Of course, in other embodiments, the blocking frame 221 can also be a circular frame, an elliptical frame, a grid frame, or other types of frame structures, which are not limited here. It should be understood that the frame strips 2211 in this embodiment are straight lines. When the blocking frame 221 is a circular frame, it can be understood that the blocking frame 221 is formed by connecting numerous straight frame strips 2211 end to end. In summary, the arc-shaped frame strips 2211 can be considered as being formed by connecting multiple straight frame strips 2211, and all should be included within the protection scope of this application.

[0044] In another embodiment of this application, such as Figure 4As shown, the aging device for the fuel cell gas diffusion layer has four frame bars 2211. The four frame bars 2211 are divided into a first frame bar 22111, a second frame bar 22112, a third frame bar 22113, and a fourth frame bar 22114 connected end to end in sequence. The first frame bar 22111 and the third frame bar 22113 are arranged in parallel and spaced apart, and the second frame bar 22112 and the fourth frame bar 22114 are arranged in parallel and spaced apart. The frame body 21 includes two connecting plates 211, which are arranged at intervals. The surfaces of the two connecting plates 211 that face each other are connected to the first frame bar 22111 and the third frame bar 22113, respectively. Specifically, the support frame 20 adopts a structure of frame bars 2211 and connecting plates 211, which is simple in structure and easy to process and manufacture. In addition, in specific applications, the gas diffusion layer is usually rectangular in structure. The first frame bar 22111, the second frame bar 22112, the third frame bar 22113 and the fourth frame bar 22114 respectively abut against the four sides of the gas diffusion layer, ensuring that the middle area of ​​the gas diffusion layer can fully contact the aging reagent, increasing the contact area between the aging reagent and the gas diffusion layer, and improving the aging efficiency. In addition, the opposing surfaces of the two connecting plates 211 are connected to the first frame bar 22111 and the third frame bar 22113 respectively. In this way, an opening gap is formed between the two adjacent second frame bars 22112 and the two adjacent fourth frame bars 22114, which can facilitate the aging reagent to flow into the containing space 23 and fill the entire containing space 23, so that the aging reagent can fully contact the gas diffusion layer and improve the aging efficiency.

[0045] In another embodiment of this application, such as Figure 3 As shown, both connecting plates 211 have handle holes 2111 above the uppermost blocking member 22.

[0046] In this embodiment, both connecting plates 211 are provided with handle holes 2111, making it easier to pick up and put down the support frame 20. Furthermore, during the experiment, when injecting the aging reagent, it is only necessary to submerge the uppermost blocking member 22. Since the height of the handle hole 2111 in the aging chamber 101 is greater than the height of the uppermost blocking member 22, contact between the hand and the aging reagent can be avoided when removing the support frame 20, effectively protecting the skin of the hand.

[0047] In another embodiment of this application, the support frame 20 is an acrylic bracket. The support frame 20 is made of acrylic material, which has advantages such as corrosion resistance, easy processing, and low cost, thereby ensuring that the support frame 20 has good reliability and service life, while being simple to manufacture and inexpensive to produce.

[0048] In another embodiment of this application, such as Figure 1As shown, the aging container 10 includes a sealing cap 11 and a body 12 with an opening. The sealing cap 11 covers the opening of the body 12 and seals the opening of the body 12. The sealing cap 11 and the body 12 together form an aging chamber 101.

[0049] In this embodiment, the sealing cap 11 is placed over the opening of the body 12 and seals the opening. This reduces the evaporation or volatilization of the aging reagent, effectively extending the aging time and making it suitable for long-term aging of batch gas diffusion layers. To reduce the corrosion of the body 12 and the sealing cap 11 by the aging reagent, the body 12 and the sealing cap 11 should be made of corrosion-resistant materials. Preferably, the body 12 and the sealing cap 11 are made of quartz, which has advantages such as high temperature resistance, acid and alkali resistance, and easy cleaning, thereby ensuring that the body 12 and the sealing cap 11 have good reliability and service life.

[0050] In another embodiment of this application, such as Figure 1 As shown, the aging device for the fuel cell gas diffusion layer also includes a condenser tube 30, and the sealing cover 11 is provided with a connection hole 111 that communicates with the aging chamber 101. The condenser tube 30 is connected to the connection hole 111.

[0051] In this embodiment, the condenser tube 30 is connected to the aging chamber 101 via the connecting hole 111. When the aging reagent in the aging chamber 101 evaporates upwards, it enters the condenser tube 30 through the connecting hole 111. Then, under the condensing action of the condenser tube 30, it changes from a gaseous state back to a liquid state and flows back into the aging chamber 101. This achieves the recycling of the aging reagent, reduces its evaporation, and effectively extends the aging time, making it suitable for long-term aging of batch gas diffusion layers. Preferably, the condenser tube 30 is a spherical condenser tube 30. Compared to a straight condenser tube 30, the spherical condenser tube 30 has a larger condensation area, resulting in better condensation and effectively reducing the evaporation of the aging reagent, thus effectively extending the aging time.

[0052] In another embodiment of this application, such as Figure 1 As shown, the sealing cover 11 is provided with an air inlet 112 for communicating with an external air duct.

[0053] In this embodiment, an external gas conduit is connected to the aging chamber 101 via a gas inlet 112. This allows the gas required for the aging process to be injected into the aging chamber 101 through the external gas conduit, thereby improving the aging efficiency of the gas diffusion layer. For example, when the aging reagent is dilute sulfuric acid, injecting oxygen or air into the aging chamber 101 keeps the oxygen in the aging reagent saturated, which helps accelerate the aging of the gas diffusion layer and improves the aging efficiency. When the aging reagent is hydrogen peroxide, injecting oxygen or air into the aging chamber 101 promotes the reverse decomposition reaction of hydrogen peroxide, slowing down its decomposition and accelerating the aging of the gas diffusion layer, extending the aging time, and improving the aging efficiency.

[0054] In another embodiment of this application, such as Figure 1 As shown, the aging device for the fuel cell gas diffusion layer also includes a sealing ring 40, and the body 12 and the sealing cover 11 are sealed together by the sealing ring 40.

[0055] In this embodiment, the body 12 and the sealing cap 11 are sealed together by a sealing ring 40, which improves the airtightness of the aging chamber 101, reduces the evaporation or volatilization of the aging reagent, and effectively extends the aging time, making it suitable for long-term aging of batch gas diffusion layers. To reduce the corrosive effect of the aging reagent on the sealing ring 40, the sealing ring 40 should be made of a corrosion-resistant material. Preferably, the sealing ring 40 is made of fluororubber, which has advantages such as corrosion resistance and high temperature resistance.

[0056] In another embodiment of this application, the aging device for the fuel cell gas diffusion layer further includes a sealing clip (not shown), and a flange 121 is provided at the end of the body 12 near the opening. The sealing clip is clamped to the edge of the flange 121 and the sealing cover 11.

[0057] In this embodiment, the two clamping ends of the sealing clip act on the upper surface of the edge of the sealing cap 11 and the lower surface of the flange 121, respectively. This allows the sealing cap 11 and the flange 121 to fit tightly together, improving the airtightness of the aging container 10 and effectively reducing the leakage of aging reagent from the gap between the sealing cap 11 and the container body 12. This extends the aging time and is suitable for long-term aging of batch gas diffusion layers. The sealing clip can be used in conjunction with the sealing ring 40 to further improve the airtightness of the aging container 10. The upper surface of the flange 121 may have a mounting groove 1211. The sealing ring 40 is disposed in the mounting groove 1211 and clamped between the flange 121 and the periphery of the sealing cap 11 to achieve sealing of the aging chamber 101.

[0058] In another embodiment of this application, the aging device for the fuel cell gas diffusion layer further includes a water bath heating device (not shown), and the aging container 10 is disposed in the water bath heating device.

[0059] In this embodiment, the aging container 10 is placed in a water bath heating device to increase the temperature of the aging reagent by water bath heating, thereby accelerating the aging of the gas diffusion layer and improving the aging efficiency.

[0060] The following describes the usage method and steps of the aging device for the fuel cell gas diffusion layer provided in the embodiments of this application:

[0061] Step 1: Select 5 blocking components 22 for the support frame 20. All 5 blocking components 22 are blocking frames 221. The interval between each blocking frame 221 is 5mm, that is, the height of the accommodating space 23 is 5mm. The area of ​​the hollow area 2212 in each blocking frame 221 is 9mm*14cm. Prepare 4 gas diffusion layers with an area of ​​10cm*15cm. Insert the 4 gas diffusion layers into the 4 accommodating spaces 23 formed by the 5 blocking frames 221 respectively. Then put the support frame 20 into the aging chamber 101 and place it on the bottom surface of the aging container 10.

[0062] Step 2: Prepare the aging reagent, which is a 0.5 mol / L sulfuric acid solution. Inject the aging reagent into the aging chamber 101 until the support frame 20 is submerged. Place the sealing ring 40 into the mounting groove 1211 of the flange 121 of the body 12, then cover the body 12 with the sealing cap 11. Then, clamp multiple sealing clips on the edges of the flange 121 and the sealing cap 11, and distribute them evenly around the circumference of the sealing cap 11 to ensure that the aging container 10 is sealed from all sides.

[0063] Step 3: Place the aging container 10 in a water bath heating device. Connect the external air inlet pipe to the air inlet 112 of the sealing cap 11, and continuously inject air into the aging chamber 101. Connect the condenser pipe 30 to the connection hole 111 of the sealing cap 11, and connect the condenser pipe 30 to the external circulating condensate. Seal the water bath heating device to reduce liquid evaporation. Maintain the water bath temperature at 70°C, and the aging time is 96 hours. Take out one gas diffusion layer every 24 hours. After 96 hours, four gas diffusion layers with different aging degrees can be obtained.

[0064] The above-described method and steps for using the aging device for fuel cell gas diffusion layers can, on the one hand, effectively ensure that each gas diffusion layer is immersed in the aging reagent and does not float on the surface of the aging reagent, that each gas diffusion layer is spaced apart and does not stick together, and that the upper and lower surfaces of each gas diffusion layer can be in full contact with the aging reagent; on the other hand, it can effectively reduce the volatilization or evaporation of the aging reagent and can age a batch of gas diffusion layers for a long time.

[0065] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. An aging apparatus for a gas diffusion layer of a fuel cell, characterized by comprising: a gas diffusion layer; a gas diffusion layer aging device; and a gas diffusion layer aging device control unit. The application relates to a fuel cell gas diffusion layer aging device. The application relates to a fuel cell gas diffusion layer aging device. The application relates to a fuel cell gas diffusion layer aging device. The application relates to a fuel cell gas diffusion layer aging device.

2. The device for aging a gas diffusion layer of a fuel cell according to claim 1, characterized by: The application relates to a fuel cell gas diffusion layer aging device.

3. The device for aging a gas diffusion layer of a fuel cell according to claim 2, characterized by: The application relates to a fuel cell gas diffusion layer aging device. The application relates to a fuel cell gas diffusion layer aging device.

4. The device for aging a gas diffusion layer of a fuel cell according to any one of claims 1 to 3, characterized by: The application relates to a fuel cell gas diffusion layer aging device.

5. The device for aging a gas diffusion layer of a fuel cell according to claim 1, characterized by: The application relates to a fuel cell gas diffusion layer aging device.

6. The device for aging a gas diffusion layer of a fuel cell according to claim 1, characterized by: The application relates to a fuel cell gas diffusion layer aging device. The application relates to a fuel cell gas diffusion layer aging device. The application relates to a fuel cell gas diffusion layer aging device. The application relates to a fuel cell gas diffusion layer aging device. The application relates to a fuel cell gas diffusion layer aging device. The application relates to a fuel cell gas diffusion layer aging device. The application relates to a fuel cell gas diffusion layer aging device. The application relates to a fuel cell gas diffusion layer aging device. The application relates to a fuel cell gas diffusion layer aging device. The application relates to a fuel cell gas diffusion layer aging device. The application relates to a fuel cell gas diffusion layer aging device. The application relates to a fuel cell gas diffusion layer aging device. 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