Draw test tooling and draw test system for bipolar plate assemblies

Abstract

The application relates to a tensile force test tool and tensile force test system for a bipolar plate assembly. The tensile force test tool for the bipolar plate assembly comprises two tensile components arranged oppositely, which are used for clamping and bonding the bipolar plate assembly. The tensile component comprises a clamping piece with a first side and a second side arranged oppositely along the thickness direction thereof, a bonding piece arranged on the first side and used for bonding the bipolar plate assembly, a tensile piece arranged on the second side and connected with the clamping piece, and a limiting piece arranged on the end of the tensile piece away from the clamping piece and protruding from the side circumferential surface of the tensile piece along the circumferential direction of the tensile piece. The tensile force test tool and tensile force test system for the bipolar plate assembly provided by the application are simple in structure, simple in assembly process with the bipolar plate assembly, and convenient to operate.

Description

Technical Field

[0001] This application relates to the field of flow battery technology, specifically to a pull-out force testing fixture and system for bipolar plate assemblies. Background Technology

[0002] Bipolar plates are the core components of flow battery stacks, primarily responsible for multiple functions including conductivity, liquid resistance, support, and fluid distribution. After two bipolar plates are bonded together with hot melt adhesive to form a bipolar plate assembly, the assembly needs to be tested for pull-out strength. The test results are used to evaluate the interfacial bonding strength between the bipolar plates and the hot melt adhesive, ensuring that the bipolar plates and hot melt adhesive will not detach or delaminate under specific external forces.

[0003] Existing pull-out force testing fixtures for bipolar plate assemblies are complex in structure and have complicated assembly processes, making them inconvenient to operate. Utility Model Content

[0004] Therefore, it is necessary to provide a simple structure, easy assembly process with bipolar plate assemblies, and convenient operation for testing the pull-out force of bipolar plate assemblies, in order to address the above problems.

[0005] A pull-out force testing fixture for a bipolar plate assembly, the fixture comprising two pull-out components arranged opposite each other, the two pull-out components being used to clamp and bond the bipolar plate assembly, each pull-out component comprising: The clamping member has a first side and a second side disposed opposite to each other along its thickness direction; An adhesive element is disposed on the first side and is used to bond the bipolar plate assembly; A puller, disposed on the second side and connected to the clamping member; and A limiting member is disposed at the end of the pulling member away from the clamping member, and protrudes from the side circumferential surface of the pulling member along the circumferential direction.

[0006] In some embodiments, the pulling member includes an assembly portion and a pulling portion, the assembly portion being stacked and connected to the clamping member, the pulling portion being disposed on the assembly portion and protruding from the side of the assembly portion opposite to the clamping member.

[0007] In some embodiments, the assembly part has a stepped hole, the stepped hole including a first sub-hole and a second sub-hole that are interconnected, the first sub-hole being disposed close to the clamping member relative to the second sub-hole, and the cross-sectional area of ​​the first sub-hole being larger than the cross-sectional area of ​​the second sub-hole; The pulling part includes a connected seat and a rod. The seat is engaged with the first sub-hole, and the rod passes through the second sub-hole and extends to the side of the assembly part opposite to the clamping member.

[0008] In some embodiments, the seat is located within the first sub-hole.

[0009] In some embodiments, the assembly part has a first connecting hole, the clamping member has a second connecting hole, and the pull-out force testing fixture for the bipolar plate assembly further includes a detachable part, which is fastened to the first connecting hole and the second connecting hole.

[0010] In some embodiments, the detachable component is screwed to the first connection hole and the second connection hole.

[0011] In some embodiments, the pull portion is perpendicular to the assembly portion.

[0012] In some embodiments, the side peripheral surface of the drawing part includes two opposing planes and two opposing threaded surfaces, both of which are connected between the two planes, and the two planes are respectively used to fit against the two clamping plates; The limiting component includes a connected nut and a washer. Both the washer and the nut are sleeved on the pulling part, and the washer is positioned close to the assembly part relative to the nut. The nut is screwed to the two threaded surfaces.

[0013] In some embodiments, the adhesive is a strong double-sided adhesive.

[0014] A pull-out force testing system for bipolar plate assemblies includes a testing machine and a pull-out force testing fixture for bipolar plate assemblies as described in any of the above embodiments. The testing machine includes two force-applying components, each corresponding to a pull-out component. Each force-applying component includes two clamping plates. In the corresponding force-applying component and the pull-out component, the two clamping plates are clamped to opposite sides of the pull-out component and abut against the side of the limiting component near the clamping component. The two force-applying components are used together to pull the two pull-out components in opposite directions.

[0015] Compared with the prior art, this application has the following beneficial effects: The aforementioned pull-out force testing fixture and system for bipolar plate assemblies comprises clamping components, bonding components, a pull-out component, and limiting components. The fixture has a simple structure and can be connected to the bipolar plate assembly for pull-out force testing solely through bonding. This assembly method is simple and convenient to operate. Furthermore, by limiting the force-applying component, the limiting components prevent the force-applying component from detaching from the pull-out component during the pull-out process, ensuring the smooth execution of the pull-out test and thus improving the convenience and reliability of the pull-out test operation. Attached Figure Description

[0016] Figure 1 This is an exploded view of the clamping plate of the bipolar plate assembly and the force application assembly in one embodiment of this application, showing the pull-out force testing fixture for the bipolar plate assembly. Figure 2 for Figure 1 The diagram shows the structural arrangement of the adhesive component and the clamping component. Figure 3 This is a front view of the bipolar plate assembly and the clamping plate of the bipolar plate assembly and the force application component after the pull-out force testing fixture for the bipolar plate assembly is engaged in one embodiment of this application. Figure 4 for Figure 3 The cross-sectional view shown is taken along the AA direction after the pull-out force testing fixture for the bipolar plate assembly is fitted with the clamping plate of the bipolar plate assembly and the force application component. Figure 5 for Figure 4 The diagram shows an enlarged view of a portion of structure B after the pull-out force testing fixture for bipolar plate assemblies is fitted with the clamping plates of the bipolar plate assemblies and the force application components. Figure 6 This is a schematic diagram of the structure of the drawing part in one embodiment of this application; Figure 7 This is a schematic diagram of the assembly part in one embodiment of this application.

[0017] Icon labels: 1000, Pull-out force testing system for bipolar plate assemblies; 2000, Bipolar plate assemblies; 100. Pull-out force testing fixture for bipolar plate assemblies; 200. Force application assembly; 100a, Pulling assembly; 10. Clamping component; 11. Second connecting hole; 20. Adhesive component; 30. Pulling component; 31. Pulling part; 311. Seat; 312. Rod; 3121. Threaded surface; 3122. Flat surface; 32. Assembly part; 321. First sub-hole; 322. Second sub-hole; 323. First connecting hole; 40. Limiting component; 41. Nut; 42. Washer; 50. Detachable component; 210. Plywood; 2100, bipolar plate; 2200, hot melt adhesive; X, the thickness direction of the clamping component. Detailed Implementation

[0018] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0019] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, 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.

[0020] 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 at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0021] 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.

[0022] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0023] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0024] Bipolar plates are the core components of flow battery stacks, primarily responsible for multiple functions including conductivity, liquid resistance, support, and fluid distribution. After two bipolar plates are bonded together with hot melt adhesive to form a bipolar plate assembly, the assembly needs to be tested for pull-out strength. The test results are used to evaluate the interfacial bonding strength between the bipolar plates and the hot melt adhesive, ensuring that the bipolar plates and hot melt adhesive will not detach or delaminate under specific external forces.

[0025] Existing pull-out force testing fixtures for bipolar plate assemblies are complex in structure and have complicated assembly processes, making them inconvenient to operate.

[0026] Please refer to the following: Figures 1 to 5 In view of this, the applicant, after in-depth research, designed a pull-out force testing fixture for a bipolar plate assembly 2000, which includes two pull-out components 100a arranged opposite each other. The two pull-out components 100a are used to clamp and bond the bipolar plate assembly 2000. The bipolar plate assembly 2000 includes two bipolar plates 2100 and hot melt adhesive 2200 bonded between the two bipolar plates 2100. Among them, the pull-out component 100a includes a clamping member 10, an adhesive member 20, a pull-out component 30, and a limiting member 40. The clamping member 10 has a first side and a second side arranged opposite each other along its thickness direction. The adhesive member 20 is disposed on the first side and is used to bond the bipolar plate assembly 2000. The pull-out component 30 is disposed on the second side and connected to the clamping member 10. The limiting member 40 is disposed at the end of the pull-out component 30 away from the clamping member 10 and protrudes from the side circumferential surface of the pull-out component 30 along its circumferential direction.

[0027] As an example, the clamping member 10 has a flat plate structure to facilitate the installation of the adhesive member 20 and the puller member 30. The shape of the clamping member 10 is adapted to the shape of the bipolar plate assembly 2000; for example, both the clamping member 10 and the bipolar plate assembly 2000 are circular.

[0028] As an example, the clamping member 10 is made of a material with good mechanical strength, such as steel plate or copper plate.

[0029] The adhesive 20 is a double-sided adhesive layer. One side is used to bond with the clamping member 10 to fix the adhesive 20, and the other side is used to bond a bipolar plate 2100 of the bipolar plate assembly 2000.

[0030] Preferably, the adhesive 20 is a strong double-sided adhesive, and the adhesive strength of the adhesive 20 is greater than that of the hot melt adhesive 2200, so as to ensure that the pull-out assembly 100a can always be bonded to the bipolar plate 2100 during the pull-out test, and to ensure the smooth progress of the pull-out test.

[0031] The pulling member 30 is connected to the clamping member 10 and pulls the bipolar plate assembly 2000 under the action of the force application component 200 of the testing machine.

[0032] In actual operation, the two clamping parts 10 of the two pulling components 100a clamp the bipolar plate assembly 2000, and the two bonding parts 20 of the two pulling components 100a are respectively bonded to the two bipolar plates 2100 of the two bipolar plate assemblies 2000, so that the bipolar plate assembly 2000 and the two pulling components 100a are bonded to form a whole. Then, the two force-applying components 200 of the testing machine clamp the two pulling parts 30 respectively, and the two force-applying components 200 are abutted between the two limiting parts 40. Then, the two force-applying components 200 pull the two pulling parts 30 in the opposite direction of the thickness X of the clamping parts 10 until the bipolar plate 2100 separates from the hot melt adhesive 2200. The testing machine records the pull force when the bipolar plate 2100 separates from the hot melt adhesive 2200. Based on the pull force, it can be determined whether the interface bonding strength of the bipolar plate 2100 and the hot melt adhesive 2200 after bonding meets the requirements.

[0033] In this application, a pull-out force testing fixture for a bipolar plate assembly 2000, formed by the clamping member 10, the adhesive member 20, the pulling member 30, and the limiting member 40, has a simple structure. It can be connected to the bipolar plate assembly 2000 and used for pull-out force testing simply by adhesive bonding. This assembly method is simple and convenient to operate. Furthermore, by limiting the force-applying component 200 by the limiting member 40, the force-applying component 200 can be prevented from detaching from the pulling component 100a during the pull-out process, ensuring the smooth conduct of the pull-out test and thus improving the convenience and reliability of the pull-out test operation.

[0034] Please see Figure 4 , Figure 6 and Figure 7 In some embodiments, the puller 30 includes an assembly portion 32 and a puller portion 31. The assembly portion 32 is stacked and connected to the clamping member 10. The puller portion 31 is disposed on the assembly portion 32 and protrudes from the side of the assembly portion 32 facing away from the clamping member 10.

[0035] The drawing part 31 and the assembly part 32 can be integrally formed or separately formed and connected by welding, fasteners or other means. The assembly part 32 is connected to the clamping member 10 so that the drawing member 30, the clamping member 10, the bonding member 20 and the bipolar plate assembly 2000 are connected to form a whole. The drawing part 31 is used to draw the bipolar plate assembly 2000 from the opposite direction.

[0036] The method of forming the drawing part 30 by connecting the assembly part 32 and the drawing part 31 is simple, convenient and easy to form.

[0037] In some embodiments, the assembly part 32 has a stepped hole, which includes a first sub-hole 321 and a second sub-hole 322 that are interconnected. The first sub-hole 321 is disposed close to the clamping member 10 relative to the second sub-hole 322, and the cross-sectional area of ​​the first sub-hole 321 is larger than the cross-sectional area of ​​the second sub-hole 322. The pulling part 31 includes a seat 311 and a rod 312 connected to each other. The seat 311 is engaged with the first sub-hole 321, and the rod 312 passes through the second sub-hole 322 and extends to the side of the assembly part 32 facing away from the clamping member 10.

[0038] Specifically, the cross-sectional area of ​​the base 311 is larger than the cross-sectional area of ​​the second sub-hole 322, the shape and size of the base 311 are adapted to the first sub-hole 321, and the shape and size of the rod 312 are adapted to the second sub-hole 322.

[0039] In actual operation, the seat 311 abuts against the groove wall of the first sub-hole 321 and acts on the bipolar plate assembly 2000 in sequence through the assembly part 32, the clamping part 10 and the adhesive part 20 to pull the bipolar plate assembly 2000.

[0040] By providing stepped holes on the assembly part 32, with the seat 311 engaging with the first sub-hole 321 of the stepped hole and the rod 312 engaging with the second sub-hole 322 of the stepped hole, the seat 311 and the assembly part 32 can fit tightly together during the drawing process. This allows the force to be stably transmitted to the bipolar plate assembly 2000 via the assembly part 32, the clamping member 10, and the bonding member 20, thus improving the stability and reliability of the drawing process. Furthermore, this design also prevents the seat 311 from separating from the assembly part 32 during the drawing process.

[0041] Furthermore, in some embodiments, the seat 311 is located within the first sub-hole 321. This design avoids the situation where the seat 311 protrudes outside the first sub-hole 321, causing the assembly part 32 to fail to fit with the clamping member 10, thus ensuring a more secure connection between the assembly part 32 and the clamping member 10.

[0042] Please continue reading. Figure 4 , Figure 6 and Figure 7 In some embodiments, the assembly part 32 has a first connecting hole 323, the clamping member 10 has a second connecting hole 11, and the pull-out force testing fixture for the bipolar plate assembly 2000 also includes a detachable member 50, which is fastened to the first connecting hole 323 and the second connecting hole 11.

[0043] As an example, the assembly part 32 has a plurality of first connecting holes 323 along its circumference, the clamping member 10 has a plurality of second connecting holes 11, and there are a plurality of detachable members 50. The first connecting holes 323 and the second connecting holes 11 correspond one-to-one with the detachable members 50, and the detachable members 50 are fastened to the corresponding first connecting holes 323 and second connecting holes 11.

[0044] Specifically, the detachable part 50 is fastened to the first connecting hole 323 and the second connecting hole 11 to achieve the connection between the clamping part 10 and the pulling part 30. When either the pulling part 30 or the clamping part 10 is deformed or damaged, the pulling part 30 or the clamping part 10 can be replaced by disassembling the detachable part 50, so that the undeformed or undamaged components of the pull-out force testing fixture for the bipolar plate assembly 2000 can be reused.

[0045] In some embodiments, the detachable part 50 is a screw, and the first connecting hole 323 and the second connecting hole 11 are both threaded holes. The detachable part 50 is screwed to the first connecting hole 323 and the second connecting hole 11 to achieve a detachable connection between the detachable part 50 and the first connecting hole 323 and the second connecting hole 11, and the assembly and disassembly are convenient.

[0046] Of course, the specific forms of the detachable part 50, the first connecting hole 323 and the second connecting hole 11 are not limited to the above embodiments. In some other embodiments, the detachable part 50 may also be a pin, and the first connecting hole 323 and the second connecting hole 11 may be through holes.

[0047] In some embodiments, the pulling portion 31 is perpendicular to the assembly portion 32. Specifically, the assembly portion 32 is perpendicular to the thickness direction X of the clamping member 10, and the pulling portion 31 extends along the thickness direction X of the clamping member 10. Therefore, during the pulling process, the bipolar plate assembly 2000 can be pulled along the thickness direction X of the clamping member 10, making the pulling process less strenuous.

[0048] Please see Figure 4 and Figure 6 In some embodiments, the side peripheral surface of the pulling part 31 includes two opposing planes 3122 and two opposing threaded surfaces 3121. The two threaded surfaces 3121 are connected between the two planes 3122. The two planes 3122 are used to fit against the two clamping plates 210 respectively. The limiting member 40 includes a connected nut 41 and a washer 42. The washer 42 and the nut 41 are both sleeved on the pulling part 31. The washer 42 is disposed near the assembly part 32 relative to the nut 41. The nut 41 is screwed to the two threaded surfaces 3121.

[0049] Understandably, the nut 41 is screwed onto the threaded surface 3121 to install the limiting component 40. The two flat surfaces 3122 are used to fit against the two clamping plates 210 of the force application component 200, which can facilitate the clamping of the pulling component 30 by the two clamping plates 210. The washer 42 is used to block the two clamping plates 210 to prevent the force application component 200 from moving relative to the pulling component 30 in the first direction and separating from the pulling component 30 during the pulling process, thus effectively improving the reliability of the pulling test.

[0050] Please see Figure 1 , Figure 3 and Figure 4 This application also provides a pull-out force testing system for a bipolar plate assembly 2000, which includes a testing machine and a pull-out force testing fixture for the bipolar plate assembly 2000 as described in any of the above embodiments. The testing machine includes two force-applying components 200, each corresponding to a pull-out assembly 100a. Each force-applying component 200 includes two clamping plates 210. In the corresponding force-applying component 200 and pull-out assembly 100a, the two clamping plates 210 are clamped to opposite sides of the pull-out member 30 and abut against the side of the limiting member 40 near the clamping member 10. The two force-applying components 200 are used together to pull the two pull-out assemblies 100a in opposite directions.

[0051] Specifically, the two clamping plates 210 are respectively attached to the two flat surfaces 3122 on the drawing part 31 to facilitate the clamping of the drawing part 30 by the two clamping plates 210.

[0052] In actual operation, the two clamping parts 10 of the two pulling components 100a clamp the bipolar plate assembly 2000, and the two bonding parts 20 of the two pulling components 100a are respectively bonded to the two bipolar plates 2100 of the two bipolar plate assemblies 2000, so that the bipolar plate assembly 2000 and the two pulling components 100a are bonded to form a whole. Then, the two force-applying components 200 of the testing machine clamp the two pulling parts 30 respectively, and the two force-applying components 200 are abutted between the two gaskets 42. Then, the two pulling parts 30 are pulled in the opposite direction of the thickness X of the clamping parts 10 until the bipolar plate 2100 separates from the hot melt adhesive 2200. The testing machine records the pull force when the bipolar plate 2100 separates from the hot melt adhesive 2200. Based on the pull force, it can be determined whether the interfacial bonding strength of the bipolar plate 2100 and the hot melt adhesive 2200 meets the requirements.

[0053] The aforementioned pull-out force testing fixture and system for the bipolar plate assembly 2000, formed by the cooperation of clamping member 10, adhesive member 20, pull-out member 30, and limiting member 40, has a simple structure. It can be connected to the bipolar plate assembly 2000 and perform pull-out force testing solely through adhesive bonding. This assembly method is simple and convenient to operate. Furthermore, by limiting the force-applying member 200 by the limiting member 40, the force-applying member 200 can be prevented from detaching from the pull-out member 100a during the pull-out process, ensuring the smooth conduct of the pull-out test and thus improving the convenience and reliability of the pull-out test operation.

[0054] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0055] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A pull-out force testing fixture for bipolar plate assemblies, characterized in that, The pull-out force testing fixture for the bipolar plate assembly includes two pull-out assemblies (100a) arranged opposite each other. The two pull-out assemblies (100a) are used to clamp and bond the bipolar plate assembly (2000). Each pull-out assembly (100a) includes: The clamping member (10) has a first side and a second side disposed opposite to each other along its thickness direction; An adhesive (20) is disposed on the first side and is used to bond the bipolar plate assembly (2000). A puller (30) is disposed on the second side and connected to the clamping member (10); and A limiting member (40) is disposed at one end of the pulling member (30) away from the clamping member (10) and protrudes from the side circumferential surface of the pulling member (30) along the circumferential direction.

2. The pull-out force testing fixture for bipolar plate assemblies according to claim 1, characterized in that, The pulling member (30) includes an assembly part (32) and a pulling part (31). The assembly part (32) is stacked and connected with the clamping member (10). The pulling part (31) is disposed on the assembly part (32) and protrudes from the side of the assembly part (32) facing away from the clamping member (10).

3. The pull-out force testing fixture for bipolar plate assemblies according to claim 2, characterized in that, The assembly part (32) has a stepped hole, which includes a first sub-hole (321) and a second sub-hole (322) that are connected to each other. The first sub-hole (321) is located close to the clamping member (10) relative to the second sub-hole (322), and the cross-sectional area of ​​the first sub-hole (321) is larger than the cross-sectional area of ​​the second sub-hole (322). The pulling part (31) includes a connected seat (311) and a rod (312). The seat (311) is engaged with the first sub-hole (321), and the rod (312) passes through the second sub-hole (322) and extends to the side of the assembly part (32) opposite to the clamping member (10).

4. The pull-out force testing fixture for bipolar plate assemblies according to claim 3, characterized in that, The seat (311) is located inside the first sub-hole (321).

5. The pull-out force testing fixture for bipolar plate assemblies according to claim 2, characterized in that, The assembly part (32) has a first connecting hole (323), the clamping member (10) has a second connecting hole (11), and the pull-out force testing fixture for the bipolar plate assembly also includes a detachable part (50), which is fastened to the first connecting hole (323) and the second connecting hole (11).

6. The pull-out force testing fixture for bipolar plate assemblies according to claim 5, characterized in that, The detachable part (50) is screwed to the first connecting hole (323) and the second connecting hole (11).

7. The pull-out force testing fixture for bipolar plate assemblies according to claim 2, characterized in that, The pulling part (31) is perpendicular to the assembly part (32).

8. The pull-out force testing fixture for bipolar plate assemblies according to claim 2, characterized in that, The side peripheral surface of the drawing part (31) includes two planes (3122) and two threaded surfaces (3121) arranged opposite to each other. The two threaded surfaces (3121) are connected between the two planes (3122), and the two planes (3122) are used to fit against the two clamping plates (210) respectively. The limiting member (40) includes a connected nut (41) and a washer (42). The washer (42) and the nut (41) are both sleeved on the pull-out part (31), and the washer (42) is positioned relative to the nut (41) and close to the assembly part (32). The nut (41) is screwed to the two threaded surfaces (3121).

9. The pull-out force testing fixture for bipolar plate assemblies according to claim 1, characterized in that, The adhesive (20) is a strong double-sided adhesive.

10. A pull-out force testing system for bipolar plate assemblies, characterized in that, Includes a testing machine and a pull-out force testing fixture for bipolar plate assemblies as described in any one of claims 1 to 9 above; The testing machine includes two force-applying components (200), which correspond one-to-one with the pulling component (100a). Each force-applying component (200) includes two clamping plates (210). In the corresponding force-applying component (200) and the pulling component (100a), the two clamping plates (210) are clamped on opposite sides of the pulling member (30) and abut against the side of the limiting member (40) near the clamping member (10). The two force-applying components (200) are used together to pull the two pull-out components (100a) in opposite directions.

Images