Fuel cell test fixture

Abstract

The utility model discloses a fuel cell test fixture including an upper end plate, a lower end plate, adjusting assemblies and a locking assembly, the upper end plate and the lower end plate are respectively arranged at the upper end and the lower end of a galvanic pile, the plurality of adjusting assemblies are arranged at the two sides of the galvanic pile, each adjusting assembly includes a binding band support and an adjusting block, and the binding band support and the adjusting block are arranged on the binding band support. One end of the bandage support is fixedly connected with the lower end plate, the other end of the bandage support is slidably connected with the adjusting block, the adjusting block is fixedly connected to the top of the upper end plate, and the locking assemblies are connected with the adjusting assemblies in a one-to-one correspondence mode and used for locking the adjusting block. And the distance between the upper end plate and the lower end plate is matched with the length of the electric pile. The fuel cell test fixture solves the technical problems that the size of the existing fuel cell test fixture with a bandage type structure is fixed, the fuel cell test fixture can only be suitable for an electric pile with one specification, the bandage needs to be frequently replaced in the test, and the bandage is greatly wasted.

Description

Technical Field

[0001] The utility model relates to the technical field of fuel cell testing, and particularly relates to a fuel cell testing fixture. Background Art

[0002] As a device capable of generating electricity using hydrogen, a fuel cell can convert the chemical energy of fuel into electrical energy, which is a new energy technology friendly to the environment. Among them, a proton exchange membrane fuel cell is usually stacked by hundreds of single cells to form a high-power battery stack to meet the use requirements. For new fuel cell products, it is usually necessary to first test a short stack with fewer cells to verify the performance of the new product.

[0003] During the existing process of testing a battery stack, the stack is generally fixed and pressed by a screw or a strap structure. For example, the "fuel cell testing fixture" disclosed in the Chinese utility model patent with the authorization announcement number CN220854416U. However, although the fixture with a screw structure can conveniently and quickly adjust the pressure required for assembling the membrane electrode, the applied torque needs to be very precise, and the assembly requirements are relatively high; while the strap structure can accurately apply the pressure required during the design of the membrane electrode, but the existing strap structure fixture does not have a size adjustment function and can only be applicable to one type of test stack. For stacks with different numbers of cells, due to the inconsistent lengths, different lengths of straps are required, which is very inconvenient for actual testing and causes relatively large waste of straps. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a fuel cell testing fixture with an adjustable size function to solve the technical problems that the size of the existing fuel cell testing fixture with a strap structure is fixed and can only be applicable to one specification of stack, resulting in the need to frequently replace straps during testing and relatively large waste of straps.

[0005] The technical solution adopted by the utility model to solve the above technical problems is as follows:

[0006] A fuel cell testing fixture includes:

[0007] An upper end plate and a lower end plate, which are respectively arranged at the upper and lower ends of the stack;

[0008] Adjusting components, a plurality of the adjusting components are arranged on both sides of the stack, and each adjusting component includes a strap bracket and an adjusting block. One end of the strap bracket is fixedly connected to the lower end plate, the other end thereof is slidably connected to the adjusting block, and the adjusting block is fixedly connected to the top of the upper end plate;

[0009] The locking assembly is connected to the adjusting assembly in a one-to-one correspondence and is used to lock the adjusting block so that the distance between the upper end plate and the lower end plate matches the length of the stack.

[0010] Further, a groove for fixedly connecting the locking assembly is formed along the length direction of the strap bracket.

[0011] Further, the groove is of a broken line structure, and the bending angles and lengths of all the broken lines of the broken line structure are the same.

[0012] Further, the locking assembly includes a clamping block and a locking bolt. The clamping block matches the shape of the broken line. The clamping block is inserted into the groove and the adjusting block and is locked by the locking bolt.

[0013] Further, the length of the adjusting block in the vertical direction is equal to the vertical length of the two broken lines.

[0014] Further, an installation groove is formed on one side of the adjusting block connected to the strap bracket, and the installation groove is used to install the clamping block.

[0015] Further, first flanges are respectively formed on both sides of the strap bracket connected to the adjusting block, and second flanges are respectively formed on both sides of the adjusting block connected to the strap bracket. The adjusting block and the strap bracket are slidably connected through the cooperation of the first flanges and the second flanges.

[0016] Further, corresponding openings are respectively formed on both sides of the upper end plate and the lower end plate, and the openings are used to install the strap bracket.

[0017] Further, a plurality of the openings on the same side are arranged at equal intervals.

[0018] Further, the adjusting block is fixedly connected to the top of the upper end plate through a fixing bolt.

[0019] Compared with the prior art, the beneficial effects of the present utility model mainly include:

[0020] A fuel cell test fixture provided by the present utility model has a dimension adjustable function. Specifically, the matching dimension between the fixture and the fuel cell stack is adjusted by adjusting the position of the adjusting block on the strap bracket. When the adjusting block moves to a position where the distance between the upper end plate and the lower end plate matches the length of the fuel cell stack to be tested, the adjusting block is locked at the current position through the locking assembly. When the length of the fuel cell stack to be tested changes, the position of the adjusting block on the strap bracket is readjusted and locked. Therefore, the present utility model can connect the upper and lower end plates of the fuel cell stack through the adjustable-length adjusting assembly, so as to apply accurate set pressure to fuel cell stacks with different numbers of cells, avoid waste of straps during the test, save test costs and time, and can apply the correct pressure to the fuel cell stack, improving the assembly accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is an overall structural schematic diagram of the fuel cell test fixture of the present utility model;

[0022] Figure 2 is a structural schematic diagram of the adjusting assembly of the present utility model;

[0023] Figure 3 is a cross-sectional view of the adjusting assembly of the present utility model;

[0024] Figure 4 is a top view of the adjusting block of the present utility model;

[0025] Figure 5 is a structural schematic diagram of the locking assembly of the present utility model.

[0026] The descriptions of the reference numerals are as follows:

[0027] 1. Upper end plate, 2. Lower end plate, 3. Adjusting assembly, 31. Strap bracket, 311. Groove, 312. First flanging, 32. Adjusting block, 321. Installation groove, 322. Second flanging, 4. Locking assembly, 41. Clamping block, 42. Locking bolt, 5. Fuel cell stack. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0028] In order to make the objectives, technical solutions and advantages of the present utility model clearer, the present utility model will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0029] Please refer to Figures 1 to 5 as shown. The present utility model provides a fuel cell test fixture. The fuel cell test fixture has a dimension adjustable function to be applicable to fuel cell stacks with different numbers of cells, providing a convenient, simple to operate and low-cost fixture for the test of fuel cells.

[0030] As shown Figure 1 in the figure, the fuel cell test fixture includes an upper end plate 1, a lower end plate 2, an adjustment assembly 3 and a locking assembly 4. The upper end plate 1 and the lower end plate 2 are respectively arranged at the upper and lower ends of the fuel cell stack 5. A plurality of the adjustment assemblies 3 are arranged on both sides of the fuel cell stack 5. Among them, each adjustment assembly 3 includes a strap bracket 31 and an adjustment block 32. One end of the strap bracket 31 is fixedly connected to the lower end plate 2, and the other end of the strap bracket 31 is a free end. The adjustment block 32 is slidably connected to the strap bracket 31 and can move up and down on the strap bracket 31, and finally the adjustment block 32 is fixedly connected to the top of the upper end plate 1. The locking assembly 4 corresponds to and is fixedly connected to the adjustment assembly 3 one by one. When the distance between the adjustment block 32 moving to the upper end plate 1 and the lower end plate 2 matches the length of the fuel cell stack 5 (in the present invention, it refers to the length of the fuel cell stack 5 in the vertical direction), the adjustment block 32 is fixedly locked by the locking assembly 4.

[0031] The fuel cell test fixture provided by the present invention can adjust the matching size between the fixture and the fuel cell stack 5 by adjusting the position of the adjustment block 32 on the strap bracket 31. When the distance between the adjustment block 32 moving to the upper end plate 1 and the lower end plate 2 matches the length of the fuel cell stack 5 to be tested, the adjustment block 32 is locked at the current position by the locking assembly 4. When the length of the fuel cell stack to be tested changes, the position of the adjustment block 32 on the strap bracket 31 is readjusted and locked. It can be seen that the present invention can be used for fixing fuel cell stacks with different numbers of cells during the test. Compared with the prior art, it has strong applicability and avoids waste caused by repeatedly replacing straps during the test. Moreover, the present invention can apply precise set pressure to fuel cell stacks with different numbers of cells, saving test costs and time and improving the assembly accuracy.

[0032] In one embodiment, as shown Figure 2 in the figure, the strap bracket 31 is formed with a groove 311 for fixedly connecting the locking assembly 4 along its length direction.

[0033] In one embodiment, the groove 311 is a broken line structure, and the bending angles and lengths of all the broken lines in the broken line structure are kept consistent. In this embodiment, designing the groove 311 as a broken line structure can prevent displacement between the clamping block 41 and the strap bracket 31, realizing the size fixation of the adjustment assembly 3.

[0034] In one embodiment, as shown Figure 3 and Figure 5As shown, the locking assembly 4 includes a clamping block 41 and a locking bolt 42. The clamping block 41 is matched with the shape of the broken line. The clamping block 41 is inserted into the groove 311 and the adjusting block 32 and locked by the locking bolt 42.

[0035] In one embodiment, the length of the adjusting block 32 in the vertical direction is equal to the vertical length of the two broken lines, so as to ensure that when the strap bracket 31 of the adjusting assembly 3 is adjusted to any length, the clamping block 41 can be placed into the groove 311 of the strap bracket 31 and the adjusting block 32, and two clamping blocks 41 can be exactly placed simultaneously at special positions.

[0036] In one embodiment, an installation groove 321 is formed on one side of the adjusting block 32 connected to the strap bracket 31, and the installation groove 321 is used for installing the clamping block 41.

[0037] In one embodiment, first flanges 312 are respectively formed on both sides of the strap bracket 31 connected to the adjusting block 32, and second flanges 322 are respectively formed on both sides of the adjusting block 32 connected to the strap bracket 31. The adjusting block 32 and the strap bracket 31 are slidably connected through the cooperation of the first flanges 312 and the second flanges 322. This dovetail groove - type structure can ensure that the adjusting block 32 moves back and forth along the strap bracket 31, and at the same time prevent the strap bracket 31 from sliding out along the direction perpendicular to the length of the strap bracket 31.

[0038] In one embodiment, corresponding openings are respectively formed on both sides of the upper end plate 1 and the lower end plate 2, and the openings are used for installing the strap bracket 31.

[0039] In one embodiment, a plurality of the openings on the same side are arranged at equal intervals.

[0040] In one embodiment, the adjusting block 32 is fixedly connected to the top of the upper end plate 1 through a fixing bolt.

[0041] The using process of the fuel cell test fixture provided by the present utility model is as follows:

[0042] After the fuel cell stack 5 is installed, first, the strap bracket 31 is installed on the lower end plate 2 through bolts; then, the adjusting block 32 is placed at the corresponding position on the strap bracket 31, so that the length of the adjusting assembly 3 formed by the adjusting block 32 and the strap bracket 31 is equal to the designed length of the fuel cell stack 5; then, the clamping block 41 is placed into the strap bracket 31 and the adjusting block 32, and the clamping block 41 and the adjusting block 32 are connected by the locking bolt 42 to fix the strap bracket 31; finally, the adjusting block 32 is installed in the upper end plate 1 through the fixing bolt to ensure that the fuel cell stack 5 is pressed tightly.

[0043] The specific implementation manners of the present utility model described above do not constitute a limitation to the protection scope of the present utility model. Any other corresponding changes and deformations made according to the technical concept of the present utility model shall be included within the protection scope of the claims of the present utility model.

Claims

1. A fuel cell test fixture, characterized in that: include: The upper end plate and the lower end plate are respectively arranged at the upper and lower ends of the stack; An adjustment assembly, wherein a plurality of the adjustment assemblies are arranged on both sides of the battery stack, and each adjustment assembly comprises a strap bracket and an adjustment block, wherein one end of the strap bracket is fixedly connected to the lower end plate, and the other end thereof is slidably connected to the adjustment block, and the adjustment block is fixedly connected to the top of the upper end plate; A locking assembly is connected to the adjustment assembly in a one-to-one correspondence and is used to lock the adjustment block so that the distance between the upper end plate and the lower end plate matches the length of the battery stack.

2. The fuel cell test fixture according to claim 1, characterized in that: The strap bracket is formed with a groove along its length direction for fixedly connecting with the locking assembly.

3. The fuel cell test fixture according to claim 2, characterized in that: The groove is a fold line structure, and the bending angles and lengths of all fold lines of the fold line structure are consistent.

4. The fuel cell test fixture according to claim 3, characterized in that: The locking assembly comprises a clamping block and a locking bolt. The clamping block matches the shape of the folding line. The clamping block is inserted into the groove and the adjusting block and is locked by the locking bolt.

5. The fuel cell test fixture according to claim 4, characterized in that: The length of the adjusting block in the vertical direction is equal to the vertical length of the two fold lines.

6. The fuel cell test fixture according to claim 5, characterized in that: A mounting groove is formed on one side of the adjusting block connected to the strap bracket, and the mounting groove is used to mount the clamping block.

7. The fuel cell test fixture according to claim 1, characterized in that: The strap bracket is connected to the adjustment block at two sides respectively formed with first flanges, the adjustment block is connected to the strap bracket at two sides respectively formed with second flanges, and the adjustment block and the strap bracket are slidably connected through the cooperation of the first flange and the second flange.

8. The fuel cell test fixture according to claim 1, characterized in that: Corresponding openings are formed on both sides of the upper end plate and the lower end plate, respectively, and the openings are used to install the strap bracket.

9. The fuel cell test fixture according to claim 8, characterized in that: The plurality of openings located on the same side are arranged at equal intervals.

10. The fuel cell test fixture according to claim 1, characterized in that: The adjusting block is fixedly connected to the top of the upper end plate by fixing bolts.

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