Fuel cell inspection connector with connection auxiliary device

Abstract

The utility model discloses a fuel cell inspection connector with a connection auxiliary device, which comprises a bipolar plate inspection structure and a plugboard, the bipolar plate inspection structure comprises an insertion part, the plugboard comprises clamping jaws, clamping jaw positions are arranged between the clamping jaws, and the inspection connector is provided with a connection slot; a locking structure is arranged at the upper end of the inspection connector, a guide structure is arranged at the bottom end of the clamping jaw, and the fuel cell inspection connector with the connection auxiliary device is high in operation convenience and improves installation efficiency.

Description

Technical Field

[0001] The utility model belongs to the field of fuel cells, and in particular relates to a fuel cell inspection connector with a connection auxiliary device. Background Art

[0002] When a fuel cell is working, hydrogen and oxygen pass through the anode and cathode respectively, and the chemical energy of the gas is directly converted into electrical energy under the action of the catalyst. Usually, the actual output voltage of a single fuel cell is up to about 1V. In order to meet the power requirements of the entire vehicle, dozens or hundreds of fuel cells need to be connected in series to form a battery stack.

[0003] The voltage of a single cell is an important indicator of whether the battery stack can operate normally. Whether the voltage of a single cell is normal has a great impact on the safety and reliability of the entire system. Real-time voltage detection not only helps to diagnose the cause of the battery stack failure, but also can avoid irreversible damage to the battery stack caused by low single cell voltage. Voltage detection requires the use of a patrol structure.

[0004] In the prior art, the fuel cell voltage inspection structure usually uses a plug-in PIN needle or a modular connector to connect the inspection harness to the fuel cell bipolar plate to make the circuit conductive and enable it to have voltage detection capabilities. High-power fuel cells are composed of dozens or hundreds of single-cell batteries, and the corresponding PIN needles also reach dozens or hundreds. Due to their small size and narrow installation space, it is difficult to achieve automated assembly. In the actual production process, they are usually assembled manually. This installation method is inefficient and consistency cannot be guaranteed. Although the use of inspection connectors can solve the problem of assembly consistency, the assembly efficiency is low due to the narrow installation space. In addition, due to the small gap between the bipolar plate and the inspection connector, it is easy to cause problems such as inaccurate guidance and inability to insert. Currently, plug-in PIN needles are rarely used due to their own shortcomings. Inspection connectors have become the mainstream solution. Their structure is reliable, but the shortcomings of poor plug-in convenience need to be solved.

[0005] The utility model patent with announcement number CN214797809U disclosed a terminal block for connecting a fuel cell to an inspection system on November 19, 2021. Although the connection between the plate and the inspection harness is solved, there are many operation steps, and there are certain operational difficulties when plugging the sub-end and the female end.

[0006] Another example is the utility model patent with announcement number CN216792402U, which was published on June 21, 2022. It is a voltage inspection plug-in structure for hydrogen fuel cell plates. During installation, due to the small gap between the bipolar plates and the disadvantage that the plate inspection structure is easy to deform, the plug-in position cannot be aligned during plugging, resulting in poor plugging and conduction, and poor operation convenience. Utility Model Content

[0007] The utility model aims to provide a fuel cell inspection connector with a connection auxiliary device, which has high operation convenience and improved installation efficiency, in view of the deficiencies in the prior art.

[0008] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0009] The fuel cell inspection connector with a connection auxiliary device includes a bipolar plate inspection structure and a plug plate, wherein the bipolar plate inspection structure includes a plug-in portion, the plug plate includes clamping claws, clamping claw positions are provided between the clamping claws, and a connecting slot is provided on the inspection connector; a locking structure is provided at the upper end of the inspection connector, and a guiding structure is provided at the bottom end of the clamping claw.

[0010] The guiding structure includes a clamping jaw head, the size of the clamping jaw head is smaller than the size of the clamping jaw, an X-direction support wall is provided at the bottom end of the clamping jaw head, a guide plate is provided between the plug-in parts, an X-direction sliding wall is provided at the bottom of the guide plate, and the X-direction support wall and the X-direction sliding wall are both inclined; a Z-direction sliding wall is provided between the clamping jaw head and the clamping jaw, a guide plate thrust surface is provided on the side of the guide plate, and the Z-direction sliding wall and the guide plate thrust surface are both vertically arranged.

[0011] The locking structure includes a back-stop buckle, a groove is provided at the top of the plug-in part, a locking groove is provided at the upper end of the inspection connector, the back-stop buckle is arranged at the upper end of the inspection connector, and the groove and the locking groove are both adapted to the back-stop buckle.

[0012] A guiding surface and a clamping jaw thrust surface are respectively arranged on both sides of the clamping jaw head, and the guiding surface and the clamping jaw thrust surface are both arranged vertically.

[0013] The clamping claw extends between the plug-in parts, the plug-in parts are inserted into the clamping claw position, the X-direction supporting wall contacts the X-direction sliding wall, and the guiding surface is parallel to the side of the plug-in part.

[0014] A positioning block is also arranged at the bottom of the stop buckle, and a positioning groove is also arranged at the upper end of the inspection connector, and the positioning block is matched with the positioning groove.

[0015] The plugboard also includes a handle, which is located at the upper end of the plugboard.

[0016] The handle is evenly distributed with knurled grooves, and the knurled grooves divide the surface of the handle to form plane convex blocks.

[0017] The clamping jaws are arranged at equal intervals.

[0018] The technical effect of the utility model is: the fuel cell inspection connector with connection auxiliary device of the utility model solves the problem of low assembly efficiency due to inaccurate guide and inability to insert during installation caused by narrow installation space and small gap between bipolar plate and modular inspection connector. By using the plug plate, the deformation of the plug-in part on the inspection structure of the bipolar plate can be corrected. On the other hand, the convenience of the inspection connector during the plug-in process is effectively improved, and the inspection line cannot be turned on due to poor plug-in, which improves the installation efficiency and ensures the consistency of plug-in. This ensures the normal conduction of the voltage test, which is conducive to maintaining the safety and reliability of the entire battery system. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] This specification includes the following drawings, which show the following contents:

[0020] Figure 1 It is a structural schematic diagram of a fuel cell inspection connector with a connection auxiliary device of the utility model;

[0021] Figure 2-1 and Figure 2-2 It is a front view and a side view of the plug board of the utility model;

[0022] Figure 3 It is a structural schematic diagram of the bipolar plate inspection structure of the utility model;

[0023] Figure 4-1 and Figure 4-2 It is a schematic diagram of the installation of the inspection connector and the backstop of the utility model;

[0024] Figure 5-1 to Figure 5-4 It is a three-dimensional schematic diagram of the installation operation process of the inspection connector of the utility model;

[0025] Figure 6-1 to Figure 6-4 It is a side schematic diagram of the installation operation process of the inspection connector of the utility model;

[0026] Figure 7 The utility model is a schematic diagram of the structure of the patrol inspection connector after connection.

[0027] Markings in the figure are: 1. plug-in plate; 11. handle; 111. knurled groove; 112. flat protrusion; 12. clamping jaw; 121. clamping jaw position; 13. clamping jaw head; 14. Z-direction sliding wall; 15. X-direction supporting wall; 16. guide surface; 17. clamping jaw thrust surface; 2. bipolar plate inspection structure; 21. plug-in part; 22. guide plate; 23. X-direction sliding wall; 24. guide plate thrust surface; 25. groove; 3. inspection connector; 31. inspection wiring harness; 32. stop buckle; 33. connection slot; 34. locking groove; 35. positioning block; 36. positioning groove. DETAILED DESCRIPTION

[0028] The specific implementation methods of the utility model are further explained in detail below with reference to the accompanying drawings through the description of embodiments, with the aim of helping those skilled in the art to have a more complete, accurate and in-depth understanding of the inventive concept and technical solution of the present invention and to facilitate their implementation.

[0029] like Figures 1 to 7 As shown, the fuel cell inspection connector with a connection auxiliary device includes a bipolar plate inspection structure 2 and a plug-in plate 1, the bipolar plate inspection structure 2 includes a plug-in portion 21, the plug-in plate 1 includes a clamping jaw 12, and a clamping jaw position 121 is provided between the clamping jaws 12. A connecting slot 33 is provided on the inspection connector 3, a locking structure is provided at the upper end of the inspection connector 3, and a guiding structure is provided at the bottom end of the clamping jaw 12.

[0030] like Figure 1 to Figure 2-2 As shown, the plug board 1 is composed of a handle 11 and a clamping claw 12. When in use, the handle 11 is located at the upper part of the plug board 1. Due to the holding or clamping operation, the clamping claw position 121 is located at the lower part of the plug board 1. By inserting the plug-in portion 21 between the bipolar plate inspection structure 2, the shape of the plug-in portion 21 is corrected, and the plug-in portion 21 is supported, and the shape and spacing of the plug-in portion 21 can be maintained. The clamping claw position 121 and the connection slot 33 are both adapted to the plug-in portion 21, which can ensure that each clamping claw position 121 corresponds to the plug-in portion 21. During installation, it can ensure that each plug-in portion 21 can accurately correspond to the connection slot 33, guiding the inspection connector 3 to be inserted, thereby achieving the effect of improving the convenience of plugging. The plug-in portion 21 is inserted into the connection slot 33 to realize the connection between the inspection connector 3 and the bipolar plate inspection structure 2.

[0031] When installing the modular inspection connector 3, first insert the plug-in board 1 into the gap between the bipolar plates of the battery stack. The plug-in board 1 is smaller than the bipolar plate inspection structure 2, so it can move in a small range in the inspection structure. Initially, the main surface of the plug-in board 1 is a certain distance away from the end surface of the bipolar plate inspection structure 2. At this time, the deformation of the inspection structure can be corrected, and the inspection connector 3 is aligned with the plug-in part 21 to prepare for plugging; during the insertion process, the plug-in board 1 retreats, and when the guide plate thrust surface 24 of the plug-in board 1 contacts the clamp thrust surface 17, the plug-in board 1 moves upward until it exits, and the inspection connector 3 is plugged in place. Complete the installation between the inspection harness 31 of the inspection connector 3 and the bipolar plate inspection harness 31.

[0032] like Figure 1 to Figure 2-2As shown, the guiding structure includes a jaw head 13, the size of the jaw head 13 is smaller than that of the jaw 12, an X-direction support wall 15 is provided at the bottom end of the jaw head 13, a guide plate 22 is provided between the plug-in parts 21, an X-direction sliding wall 23 is provided at the bottom of the guide plate 22, and both the X-direction support wall 15 and the X-direction sliding wall 23 are inclined; a Z-direction sliding wall 14 is provided between the jaw head 13 and the jaw 12, a guide plate thrust surface 24 is provided on the side of the guide plate 22, and both the Z-direction sliding wall 14 and the guide plate thrust surface 24 are vertically arranged. In order to ensure that the clamp head 13 can be smoothly inserted into the bipolar plate inspection structure 2, a Z-direction sliding wall 14 is provided on the side wall of the clamp 12 to reduce the resistance of the clamp 12 when inserted, so that the plug-in plate 1 can be smoothly inserted into the bipolar plate inspection structure 2. At the same time, an X-direction support wall 15 is provided at the end of the clamp head 13, so that when the plug-in plate 1 is fully inserted into the bipolar plate inspection structure 2, the X-direction support wall 15 contacts the X-direction sliding wall 23, so that the next step of the inspection connector 3 is inserted into the bipolar plate inspection structure 2. The X-direction support wall 15 and the X-direction sliding wall 23 are made into an inclined structure to ensure that the inspection connector 3 can slide on the X-direction sliding wall 23 when pushing the plug-in plate 1, thereby improving the convenience of installation.

[0033] like Figure 4-1 As shown, the locking structure includes a back-stop buckle 32, a groove 25 is provided at the top of the plug-in part 21, a locking groove 34 is provided at the upper end of the inspection connector 3, and the back-stop buckle 32 is provided at the upper end of the inspection connector 3, and the groove 25 and the locking groove 34 are both adapted to the back-stop buckle 32. The inspection connector 3 is a modular connector. In order to prevent the inspection connector 3 from being separated from the bipolar plate inspection structure 2 after installation, a groove 25 is designed on the plug-in part 21, and the width of the groove 25 is the same as the locking groove 34. After the inspection connector 3 is installed, the back-stop buckle 32 cooperates with the locking groove 34 and the groove 25 at the same time, so that the back-stop buckle 32, the inspection connector 3 and the bipolar plate inspection structure 2 form an integrated structure, which effectively ensures the stability of the installation of the inspection connector 3. The back-stop buckle 32 has a T-shaped cross-section, and its upper end is adapted to the size of the inspection connector 3, so the installation of the back-stop buckle 32 will not interfere with other components.

[0034] like Figure 2-2 As shown, the two sides of the clamp head 13 are respectively provided with a guide surface 16 and a clamp thrust surface 17, and the guide surface 16 and the clamp thrust surface 17 are both arranged vertically. The guide surface 16 is used to contact the inspection connector 3. When the clamp thrust surface 17 contacts the guide plate thrust surface 24, it can be judged that the inspection connector 3 is installed in place, and then the plugboard 1 can be taken out.

[0035] like Figure 5-1 to Figure 5-3 As shown, the clamping jaws 12 extend between the plug-in parts 21 , the plug-in parts 21 are inserted into the clamping jaw positions 121 , the X-direction support walls 15 are in contact with the X-direction sliding walls 23 , and the guide surfaces 16 are parallel to the sides of the plug-in parts 21 .

[0036] like Figure 4-1As shown, a positioning block 35 is also set at the bottom of the anti-retraction buckle 32, and a positioning groove 36 is also provided at the upper end of the inspection connector 3, and the positioning block 35 is adapted to the positioning groove 36. The positioning block 35 can facilitate the downward movement and locking process of the anti-retraction buckle 32, ensuring that the anti-retraction buckle 32 can be fully installed in place.

[0037] like Figure 1 As shown, the plugboard 1 also includes a handle 11, which is located at the upper end of the plugboard 1. The handle 11 is designed on the plugboard 1 to serve as a clamping end of a machine or a holding end of a human hand.

[0038] like Figure 1 and Figure 2-1 As shown, the handle 11 is evenly distributed with knurled grooves 111, and the knurled grooves 111 divide the surface of the handle 11 to form a plane convex block 112. The gripping surface of the handle 11 is knurled to form transversely and longitudinally distributed knurled grooves 111, and the knurled grooves 111 divide the gripping surface of the handle 11 to form an evenly distributed plane convex block 112 structure, which can increase the friction of the machine clamping or the operator's hand grip, thereby improving the operation stability.

[0039] like Figure 1 and Figure 2-1 As shown, the clamping jaws 12 are arranged at equal intervals. The clamping jaws 12 arranged at equal intervals are adapted to the bipolar plate inspection structure 2 to ensure that each bipolar plate plug-in portion 21 can be supported by the clamping jaws 12 to ensure the consistency of the plug-in.

[0040] Reference Figure 5-1 to Figure 5-4 as well as Figure 6-1 to Figure 6-4 , the connection process of the inspection connector 3 is as follows: when in use, first insert the plug-in board 1 into the bipolar plate inspection structure 2, so that the guide surface 16 is basically flush with the plug-in part 21, at this time, the X-axis support wall 15 is in contact with the X-axis sliding wall 23; align the connection slot 33 in the inspection connector 3 with the plug-in part 21 and slowly insert the inspection connector 3 into the bipolar plate inspection structure 2; during the insertion process, the plug-in board 1 slides by relying on the moving pair generated by the contact between the X-axis support wall 15 and the X-axis sliding wall 23. When the jaw thrust surface 17 contacts the guide plate thrust surface 24 and the plug-in board 1 can no longer slide, pull the plug-in board 1 upward along the Z-axis direction. Then continue to slowly insert the inspection connector 3 into the bipolar plate inspection structure 2 until it cannot be pushed, install it in place, install the stop buckle 32 into the inspection connector 3, so that the stop buckle 32 cooperates with the groove 25 and the locking groove 34 at the same time, and complete the installation of the inspection connector 3.

[0041] The fuel cell inspection connector with connection auxiliary device solves the problem of low assembly efficiency due to inaccurate guidance and inability to insert during installation caused by narrow installation space and small gap between bipolar plate and modular inspection connector 3. By using the plug plate 1, the deformation of the plug-in part 21 on the bipolar plate inspection structure 2 can be corrected. On the other hand, the convenience of the inspection connector 3 during the plug-in process is effectively improved, and the inspection line cannot be connected due to poor plug-in, which improves the installation efficiency and ensures the consistency of plug-in. This ensures the normal conduction of the voltage test, which is conducive to maintaining the safety and reliability of the entire battery system.

[0042] The above is an exemplary description of the utility model in conjunction with the accompanying drawings. Obviously, the specific implementation of the utility model is not limited to the above-mentioned method. As long as various non-substantial improvements are made using the method concept and technical solution of the utility model; or the above concept and technical solution of the utility model are directly applied to other occasions without improvement, they are all within the protection scope of the utility model.

Claims

1. A fuel cell inspection connector with a connection auxiliary device, characterized in that: The invention comprises a bipolar plate inspection structure (2) and a plug plate (1), wherein the bipolar plate inspection structure (2) comprises a plug-in portion (21), the plug plate (1) comprises a clamping jaw (12), a clamping jaw position (121) is provided between the clamping jaws (12), and a connecting slot (33) is provided on the inspection connector (3); a locking structure is provided at the upper end of the inspection connector (3), and a guiding structure is provided at the bottom end of the clamping jaw (12); the guiding structure comprises a clamping jaw head (13), and the size of the clamping jaw head (13) is smaller than that of the clamping jaw. (12) size, an X-direction support wall (15) is provided at the bottom end of the clamping jaw head (13), a guide plate (22) is provided between the plug-in parts (21), an X-direction sliding wall (23) is provided at the bottom of the guide plate (22), and the X-direction support wall (15) and the X-direction sliding wall (23) are both inclined; a Z-direction sliding wall (14) is provided between the clamping jaw head (13) and the clamping jaw (12), a guide plate thrust surface (24) is provided on the side of the guide plate (22), and the Z-direction sliding wall (14) and The guide plate thrust surface (24) is vertically arranged; the locking structure includes a back-stop buckle (32); a groove (25) is arranged at the top of the plug-in portion (21); a locking groove (34) is arranged at the upper end of the inspection connector (3); the back-stop buckle (32) is arranged at the upper end of the inspection connector (3); the groove (25) and the locking groove (34) are both matched with the back-stop buckle (32); the two sides of the clamping claw head (13) are respectively provided with a guide surface (16) and a clamping claw thrust surface (17); the guide surface (16) and the jaw thrust surface (17) are vertically arranged; the jaw (12) extends between the plug-in portion (21), the plug-in portion (21) is inserted into the jaw position (121), the X-direction support wall (15) contacts the X-direction sliding wall (23), and the guide surface (16) is parallel to the side of the plug-in portion (21); a positioning block (35) is also set at the bottom of the stop buckle (32), and a positioning groove (36) is also set at the upper end of the inspection connector (3), and the positioning block (35) is adapted to the positioning groove (36).

2. The fuel cell inspection connector with a connection auxiliary device according to claim 1, characterized in that: The plug board (1) further comprises a handle (11), and the handle (11) is located at the upper end of the plug board (1).

3. The fuel cell inspection connector with a connection auxiliary device according to claim 2, characterized in that: The handle (11) is evenly distributed with knurled grooves (111), and the knurled grooves (111) divide the surface of the handle (11) to form plane convex blocks (112).

4. The fuel cell inspection connector with connection auxiliary device according to claim 3, characterized in that: The clamping jaws (12) are arranged at equal intervals.

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