Battery cell helium detection jig based on eccentric rotation

Abstract

The utility model relates to a cell helium detection tool based on eccentric rotation, and the tool comprises a placement box which comprises at least one test cavity for placing a to-be-detected cell; the cover plate is configured to be slidable, and the cover plate detachably covers the placing box; the eccentric moving assembly comprises an eccentric rotating part capable of eccentrically rotating; the eccentric rotating piece can apply force to the cover plate so as to drive the cover plate to slide in a reciprocating mode, and therefore the cover plate and the containing box can be closed or separated. The cover plate is driven to slide on the placing box through the eccentric moving assembly, the overall occupied space of the jig can be effectively reduced, the overall structure of the jig is more compact, and the space utilization rate is increased.

Description

Technical Field

[0001] This utility model relates to the field of battery manufacturing technology, and more specifically, to a cell helium inspection fixture based on eccentric rotation. Background Technology

[0002] After the battery cells are welded to their casings, the sealing effect needs to be tested. Currently, battery production lines typically use helium gas testing equipment for this purpose. Helium testing fixtures usually consist of a cell placement box and a cover plate. The cell placement box has an opening at the top and a sealed cavity inside. The cover plate is used to open or close the opening of the placement box. In practice, the welded cells are first placed into the sealed cavity through the opening of the placement box. Then, the cover plate is moved to the opening of the sealed cavity using a motor or cylinder to seal the interior. Helium gas is then introduced for testing.

[0003] Current helium testing fixtures typically employ the following methods to control the movement of the sealing cover: Firstly, the drive unit and the sealing cover are placed on the same horizontal plane. In this method, due to the size of the cover, the drive unit's stroke is relatively long, and the cover's movement path and the drive unit's stroke are in the same direction on the horizontal plane, resulting in a large space occupied by the fixture in the horizontal area and creating a lot of empty space, leading to low space utilization and compactness. Secondly, the drive unit is placed above the placement box opening, and the sealing cover is placed on the opening by lifting. In this method, the drive unit and the sealing cover are directly above the placement box opening, making it inconvenient for external material handling mechanisms to place battery cells into the placement box. This obstruction is even more severe in automated production lines, resulting in poor flexibility and practicality of the fixture. Thirdly, a combination of the above two methods is used, employing two sets of drive units to drive the sealing cover in the horizontal and vertical directions respectively, thus avoiding the drive unit being directly above the opening. However, this method further increases the complexity of the fixture and occupies even more space. Utility Model Content

[0004] In view of this, the purpose of this utility model is to provide a battery cell helium inspection and treatment fixture with a compact overall structure, high space utilization, and small footprint.

[0005] The objective of this utility model is achieved through the following technical solution.

[0006] A cell helium testing fixture based on eccentric rotation includes: a placement box including at least one test cavity for placing the cell to be tested; a cover plate configured to slide, the cover plate being separable from and able to close onto the placement box; and an eccentric moving assembly including an eccentric rotating member capable of eccentric rotation; the eccentric rotating member can apply force to the cover plate to drive the cover plate to reciprocate and slide, thereby causing the cover plate to close or separate from the placement box.

[0007] In the above technical solution, the cover plate can slide independently of the placement box. The eccentric rotation of the eccentric rotating component in the eccentric moving assembly drives the cover plate to slide on the opening of the placement box, thereby opening and closing the placement box and allowing the test chamber inside the placement box to be in an open or sealed state. In specific implementation, since the cover plate is driven to slide by eccentric rotation, compared to using a linear drive component to directly drive the cover plate, the stroke of the drive component can be shortened, improving the overall compactness of the fixture. Furthermore, the eccentric moving assembly does not need to be set on the same horizontal plane as the cover plate; it can be set above or below the side of the placement box, significantly reducing the overall footprint of the fixture in the horizontal area. It also effectively utilizes the empty areas above and below the placement box, improving space utilization and making the overall structure more compact. In addition, the eccentric moving assembly of this fixture uses eccentric drive, which does not need to pass through the area facing the opening of the placement box, facilitating avoidance of external material handling structures. This allows for better application in automated production lines and automated equipment, offering greater flexibility and practicality during use.

[0008] In one embodiment, the eccentric moving component includes a fixed shaft and an opening / closing drive member; the fixed shaft passes through the eccentric rotating member, which is rotatable about the axis of the fixed shaft; one end of the eccentric rotating member is connected to the output end of the opening / closing drive member, and the other end is connected to the cover plate.

[0009] In the above technical solution, the eccentric rotating component can rotate eccentrically around the axis of the fixed shaft under the drive of the opening and closing drive component. During the rotation, it can apply force to the cover plate, thereby causing the cover plate to slide, so as to open and close the box.

[0010] In one embodiment, the eccentric rotating component includes a rotating wheel and an eccentric rotating block; the rotating wheel is rotatably mounted on the fixed shaft; the eccentric rotating block is sleeved on the rotating wheel, one end of the eccentric rotating block is connected to the output end of the opening and closing drive component, and the other end is provided with an insertion rod; the cover plate has a limit groove, and the insertion rod is slidably inserted into the limit groove.

[0011] In the above technical solution, the eccentric rotating block rotates on a fixed shaft through a rotating wheel under the force of the opening and closing drive component. The insert rod of the eccentric rotating block can slide in the limiting slide groove. The push force of the insert rod on the inner wall of the limiting slide groove drives the cover plate to slide. The insert rod and the limiting slide groove are slidably connected, and no other connecting parts are needed to connect the eccentric rotating block and the cover plate, which reduces the structural complexity and makes it easy to assemble and maintain.

[0012] In one embodiment, the device further includes a frame with opposing upright plates, and a mounting groove for accommodating the placement box is formed between the upright plates. The mounting groove has a hollow portion, and the fixing shaft is installed in the hollow portion.

[0013] In the above technical solution, by setting a hollow part in the mounting groove, the rotating wheel can rotate in the hollow part, thus achieving a higher space utilization rate.

[0014] In one embodiment, the frame is provided with a guide rail and a lifting limit assembly; the guide rail is mounted on the upright plate, and the cover plate is slidably mounted on the guide rail; the lifting limit assembly is located on one side of the guide rail, and the lifting limit assembly includes a lifting drive and a lifting push block connected to the output end of the lifting drive.

[0015] In the above technical solution, the guide rail is used to guide the cover plate, making its sliding more stable; the lifting push block can abut against the cover plate under the drive of the lifting drive component. When the cover plate is closed on the placement box, the lifting push block limits the cover plate to ensure the sealing effect.

[0016] In one embodiment, the test chamber is provided with a placement block, and the placement block has a limiting groove for placing the battery cell under test.

[0017] In the above technical solution, the limiting groove is located at the edge of the placement block, thereby exposing a set of adjacent sides of the battery cell. After the battery cell is placed in the limiting groove, it can be clamped and fixed in the limiting groove by applying force to the two exposed sides of the battery cell.

[0018] In one embodiment, the device further includes a clamping assembly for clamping the battery cell. The clamping assembly includes a first slide rail, a first clamping block, a telescopic push rod, and a push drive. The first slide rail is disposed within the test cavity, and the first clamping block is slidably mounted on the first slide rail. An elastic element that can extend and retract along the direction of the first slide rail is installed between the first clamping block and the inner wall of the test cavity. The telescopic push rod slidably passes through the placement box, with one end of the telescopic push rod extending into the test cavity and the other end connected to the output end of the push drive. The movement path of the telescopic push rod is perpendicular to the movement path of the first clamping block.

[0019] In the above technical solution, the first clamping block is perpendicular to the moving direction of the telescopic push rod. The first clamping block and the telescopic push rod can respectively abut against the adjacent long and short sides of the battery cell, and apply force to the battery cell from two directions to ensure the clamping effect of the battery cell.

[0020] In one embodiment, a push block is installed on the portion of the telescopic push rod located inside the test cavity. The first clamping block is provided with a first push groove, which has an inclined wall that is inclined relative to the sliding path of the first clamping block. One end of the push block is located in the first push groove.

[0021] In the above technical solution, the push block moves within the test chamber via a telescopic push rod. The first push groove has an inclined wall, through which the push block can drive the first clamping block to slide along the first slide rail, thereby achieving synchronous clamping and unclamping of the adjacent sides of the battery cell by the telescopic push rod and the first clamping block. Furthermore, by setting the push block to drive the first clamping block to move, the clamping and unclamping work on the adjacent sides of the battery cell can be controlled by only one driving component, which reduces the number of driving components and simplifies the fixture structure while ensuring the clamping effect.

[0022] In one embodiment, the clamping assembly further includes a second slide rail and a second clamping block; the second slide rail is disposed within the test cavity and is perpendicular to the direction of the first slide rail, and the second clamping block is slidably mounted on the second slide rail; an elastic element that can extend and retract along the direction of the second slide rail is installed between the second clamping block and the inner wall of the test cavity; the second clamping block is provided with a second push groove, and one end of the push block away from the first clamping block is disposed in the second push groove.

[0023] In the above technical solution, the second clamping block abuts against the side of the battery cell through the elastic force of the elastic element. The side of the second clamping block abutting is adjacent to the side of the first clamping block abutting, thereby clamping the two adjacent sides of the battery cell and ensuring the fixing effect of the battery cell. The push block can drive the second clamping block to slide along the second slide rail through the second push groove, so that the second clamping block and the telescopic push rod simultaneously approach or move away from the battery cell, ensuring that the clamping and opening actions are carried out synchronously.

[0024] In one embodiment, the placement box is connected to an air inlet pipe and an air extraction pipe, both of which are connected to the test chamber.

[0025] In the above technical solution, the inlet pipe is connected to an external helium gas mechanism for transporting helium gas, and the extraction pipe is connected to an external vacuum mechanism for evacuating the test chamber.

[0026] The beneficial effects of this utility model's cell helium inspection fixture based on eccentric rotation are as follows:

[0027] This invention uses eccentric rotation to drive the cover plate to slide. Compared with using a linear drive to directly drive the cover plate, this shortens the stroke of the drive component and improves the overall compactness of the fixture. In addition, the eccentric moving component does not need to be set on the same horizontal plane as the cover plate; it can be set above or below the side of the placement box, thereby significantly reducing the overall footprint of the fixture in the horizontal area. It can also effectively utilize the empty areas above and below the placement box, improving space utilization and making the overall structure more compact. Furthermore, the eccentric moving component of this fixture uses eccentric drive, which does not need to pass through the area facing the opening of the placement box, which is beneficial for avoiding external material handling structures. It can be better applied to automated production lines and automated equipment, and has greater flexibility and practicality in use. Attached Figure Description

[0028] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 This is a perspective view of a cell helium inspection fixture based on eccentric rotation, according to an embodiment of the present invention.

[0030] Figure 2 This is a schematic diagram showing the connection between the cover plate and the eccentric moving component in an embodiment of the present invention.

[0031] Figure 3 This is a schematic diagram showing the connection between the placement box and the clamping assembly in an embodiment of the present invention.

[0032] Figure 4 for Figure 3 A magnified view of area A in the middle.

[0033] Figure 5 This is a perspective view of the cell helium testing fixture according to an embodiment of the present invention.

[0034] Figure 6 This is a schematic diagram of the internal structure of the test chamber in an embodiment of the present invention.

[0035] Figure 7 for Figure 6 A magnified view of area B in the middle.

[0036] Explanation of the reference numerals in the figure:

[0037] 1-Frame; 11-Upright plate; 12-Mounting slot; 121-Clearing part; 13-Guide rail; 2-Placement box; 21-Test chamber; 22-Placement block; 221-Limiting groove; 3-Cover plate; 31-Limiting block; 311-Limiting slide; 4-Eccentric moving assembly; 41-Fixed shaft; 42-Eccentric rotating component; 421-Rotating wheel; 422-Eccentric rotating block; 4221-Insertion rod; 43-Opening and closing drive component; 5-Lifting and limiting assembly ; 51-Lifting drive component; 52-Lifting push block; 6-Clamping assembly; 61-First slide rail; 62-First clamping block; 621-First push groove; 6211-Inclined wall; 622-Extrusion section; 63-Second slide rail; 64-Second clamping block; 641-Second push groove; 65-Elastic component; 66-Telescopic push rod; 67-Push block; 68-Pushing drive component; 7-Air inlet pipe; 71-Air inlet; 8-Extraction pipe; 81-Extraction port. Detailed Implementation

[0038] To facilitate understanding of this invention, a more comprehensive description will be provided below with reference to the accompanying drawings. The drawings illustrate preferred embodiments of the invention. However, this invention can be implemented in many different forms and is not limited to the embodiments described herein.

[0039] Please refer to Figures 1 to 3 In a preferred embodiment, taking the helium testing of a square battery cell as an example, the battery cell helium testing fixture of this utility model mainly includes a frame 1, a placement box 2, a cover plate 3, and an eccentric moving assembly 4. The placement box 2 is placed on the frame 1 and includes two test chambers 21 for placing the battery cell to be tested. The cover plate 3 is configured to slide, and the cover plate 3 can be separated from and closed onto the placement box 2. The eccentric moving assembly 4 includes an eccentric rotating member 42 that can rotate eccentrically. The eccentric rotating member 42 can apply force to the cover plate 3 to drive the cover plate 3 to slide back and forth, thereby causing the cover plate 3 to close or separate from the placement box 2.

[0040] It is worth mentioning that the number of test chambers 21 can be one or more. During the test, a cell to be tested is placed in each test chamber 21. When the cover plate 3 moves, all test chambers 21 are opened or sealed at the same time.

[0041] In this embodiment, the top of the placement box 2 is provided with an opening for placing the battery cell to be tested into the test chamber 21. By rotating the eccentric rotating member 42, the cover plate 3 can be driven to slide on the opening of the placement box 2 to open and close the placement box 2, thereby putting the test chamber 21 inside the placement box 2 into an open or sealed state. Specifically, when conducting the test, the cover plate 3 is first driven to move away from the placement box 2, and the battery cell to be tested is placed into the test chamber 21 through the opening at the top of the placement box 2. Then, the cover plate 3 is driven to move above the placement box 2 to seal the test chamber 21.

[0042] It should be noted that the eccentric moving component 4 drives the cover plate 3 to slide through eccentric rotation. Compared with using a linear drive component to directly drive the cover plate 3, this can shorten the stroke of the drive component and improve the overall compactness of the fixture. In addition, the eccentric moving component 4 does not need to be set on the same horizontal plane as the cover plate 3. It can be set on the upper or lower side of the placement box 2, thereby significantly reducing the overall footprint of the fixture in the horizontal area. At the same time, it can effectively utilize the empty areas above and below the placement box 2, improve space utilization, and make the overall structure more compact. Furthermore, the eccentric moving component 4 of this fixture adopts eccentric drive, which does not need to pass through the area facing the opening of the placement box 2. This is beneficial for avoiding external material handling structures and can be better applied to automated production lines and automated equipment, with greater flexibility and practicality in use.

[0043] Please refer to Figure 1 and Figure 2The frame 1 is provided with two opposing upright plates 11, and an installation groove 12 is formed between the upright plates 11 to accommodate the box 2.

[0044] Furthermore, each of the two upright plates 11 is provided with a guide rail 13 on the side away from the mounting groove 12. The two sides of the cover plate 3 are slidably mounted on the guide rail 13. The guide rail 13 can make the sliding of the cover plate 3 more stable. A lifting and limiting component 5 is provided below the guide rail 13. The lifting and limiting component 5 includes a lifting drive component 51 and a lifting push block 52 connected to the output end of the lifting drive component 51. When the cover plate 3 is closed on the placement box 2 to seal the test chamber 21, the lifting push block 52 can abut against the cover plate 3 under the drive of the lifting drive component 51 to limit the cover plate 3, prevent the cover plate 3 from sliding during the test, and ensure the sealing effect.

[0045] Please refer to Figure 1 and Figure 2 The eccentric moving component 4 includes a fixed shaft 41 and an opening and closing drive component 43. The fixed shaft 41 passes through the eccentric rotating component 42, which can rotate around the axis of the fixed shaft 41. One end of the eccentric rotating component 42 is connected to the output end of the opening and closing drive component 43, and the other end is connected to the cover plate 3. The opening and closing drive component 43 can apply a vertical force to the end of the eccentric rotating component 42, causing it to rotate eccentrically around the axis of the fixed shaft 41. During the rotation, it can apply force to the cover plate 3, thereby driving the cover plate 3 to slide.

[0046] The opening and closing drive component 43 can be a cylinder, a linear motor, or other structures with linear drive function.

[0047] Furthermore, the eccentric rotating component 42 includes a rotating wheel 421 and an eccentric rotating block 422. The rotating wheel 421 is rotatably mounted on the fixed shaft 41, and the eccentric rotating block 422 is sleeved on the rotating wheel 421. One end of the eccentric rotating block 422 is connected to the output end of the opening and closing drive component 43, and the other end is provided with a rod 4221. The bottom of the cover plate 3 is provided with a protruding limiting block 31, and the limiting block 31 has a limiting groove 311 in the vertical direction. The rod 4221 is slidably inserted into the limiting groove 311. When the eccentric rotating block 422 rotates, the cover plate 3 can be driven to slide by the pushing force of the rod 4221 against the inner wall of the limiting groove 311. The rod 4221 and the limiting groove 311 are slidably inserted, eliminating the need for other connecting components to connect the eccentric rotating block 422 and the cover plate 3, which reduces structural complexity and facilitates assembly and maintenance.

[0048] Preferably, such as Figure 3 , Figure 5 and Figure 6As shown, a hollow section 121 is provided at the mounting groove 12 on one side of the placement box 2. The fixed shaft 41 is installed in the hollow section 121 by bolts or other fasteners. The rotating wheel 421 can rotate in the hollow section 121 to improve space utilization.

[0049] Specifically, when the opening and closing drive 43 applies a downward force to the end of the eccentric rotating block 422, the eccentric rotating block 422 rotates, and the insertion rod 4221 slides upward along the limiting slide groove 311, causing the cover plate 3 to move away from the placement box 2; when the opening and closing drive 43 applies an upward force to the end of the eccentric rotating block 422, the eccentric rotating block 422 rotates, and the insertion rod 4221 slides downward along the limiting slide groove 311, causing the cover plate 3 to move closer to the placement box 2.

[0050] It should be noted that, in order to make full use of the bottom space of the frame 1 and make the fixture layout more reasonable, the opening and closing drive component 43 in this embodiment is located below the mounting slot 12 and is installed in a vertical state. In specific implementation, the specific position of the opening and closing drive component 43 can be adjusted according to the actual needs of the site.

[0051] For example, in another embodiment of this application, the opening and closing drive member 43 can be installed horizontally below the mounting groove 12 and connected to the bottom of the eccentric rotating block 422. It can apply a horizontal force to the eccentric rotating block 422, which can also make the eccentric rotating block 422 rotate, thereby achieving the technical effect of controlling the movement of the cover plate 3.

[0052] Please refer to Figure 3 and Figure 4 The test chamber 21 is provided with a placement block 22. The placement block 22 is provided with a limiting groove 221 for placing the battery cell to be tested. The limiting groove 221 is located at the edge of the placement block 22, so that a set of adjacent sides of the battery cell are exposed. After the battery cell is placed in the limiting groove 221, it can be clamped and fixed in the limiting groove 221 by applying force to the two exposed sides of the battery cell.

[0053] Please refer to this simultaneously. Figure 3 , Figure 4 , Figure 6 and Figure 7 The helium inspection fixture also includes a clamping assembly 6, which includes a first slide rail 61, a first clamping block 62, a second slide rail 63, and a second clamping block 64.

[0054] The first slide rail 61 and the second slide rail 63 are both located inside the test cavity 21 and are perpendicular to each other. The first clamping block 62 and the second clamping block 64 are slidably installed on the first slide rail 61. An elastic element 65 is provided between the first clamping block 62 and the second clamping block 64 and the inner wall of the test cavity 21. Both ends of the elastic element 65 are fixedly connected to the inner wall of the test cavity 21 and the clamping block. Under the elastic force of the elastic element 65, the first clamping block 62 abuts against one side of the battery cell, and the second clamping block 64 abuts against the adjacent other side, thereby clamping and fixing the battery cell to be tested in the limiting groove 221. By clamping the battery cell in two directions, the fixing effect of the battery cell can be effectively guaranteed.

[0055] Furthermore, the clamping assembly 6 also includes a telescopic push rod 66, a push block 67, and a push drive 68. The telescopic push rod 66 slides through the placement box 2, with one end inserted into the test cavity 21. The push drive 68 is installed in the mounting slot 12 on the frame 1. The portion of the telescopic push rod 66 located outside the placement box 2 is connected to the output end of the push drive 68. The moving direction of the telescopic push rod 66 is the same as the moving direction of the second clamping block 64. The push block 67 is installed on the portion of the telescopic push rod 66 located inside the test cavity 21. The first clamping block 62 has a first push groove 621, and the second clamping block 64 has a second push groove 641. The two ends of the telescopic push rod 66 are respectively installed in the first push groove 621 and the second push groove 641, and move and abut against the first clamping block 62 and the second clamping block 64 through the first push groove 621 and the second push groove 641. The first push groove 621 has an inclined wall 6211 that is inclined relative to the sliding path of the first clamping block 62. The push block 67 can push the inclined wall 6211 to make the first clamping block 62 obtain a component force along the length direction of the first slide rail 61, thereby moving the first slide rail 61. Through the above design, the clamping and opening of the adjacent two sides of the battery cell can be controlled by only one drive unit. While effectively ensuring the clamping effect, the number of drive units is reduced and the fixture structure is simplified.

[0056] When it is necessary to place a battery cell into the limiting groove 221, or to open and place a battery cell already in the limiting groove 221, the telescopic push rod 66 moves away from the limiting groove 221. Under the abutment of the push block, the first clamping block 62 and the second clamping block 64 move along the first slide rail 61 and the second slide rail 63 respectively, moving away from the limiting groove 221 simultaneously. At this time, both elastic elements 65 are in a compressed state. After the first clamping block 62 and the second clamping block 64 move away from the limiting groove 221, the battery cell can be removed or placed in. When it is necessary to clamp the placed battery cell, the telescopic push rod 66 moves towards the limiting groove 221, the compressed elastic elements 65 gradually return to their original position, and the first clamping block 62 and the second clamping block 64 abut against the placed battery cell again, clamping the battery cell. The above cyclic action realizes the synchronous clamping and opening of the battery cell.

[0057] In this process, when clamping the battery cell, the end of the telescopic push rod 66 moves to contact the side of the battery cell, thereby also clamping the battery cell. Specifically, the telescopic push rod 66 and the second clamping block 64 abut against the same side of the battery cell.

[0058] It should be noted that the dimensions of the first push groove 621 and the second push groove 641 are longer than the dimensions of the push block. When the first clamping block 62 and the second clamping block 64 clamp the battery cell, the push block does not apply force to the first clamping block 62 and the second clamping block 64. This ensures that the first clamping block 62 and the second clamping block 64 are in full contact with the battery cell under the action of the elastic member 65, avoids the relevant errors of the push block from affecting the clamping effect of the first clamping block 62 and the second clamping block 64 on the battery cell, and improves the reliability of clamping.

[0059] Preferably, the elastic element 65 is a spring, and the first clamping block 62 and the second clamping block 64 have protruding pressing parts 622 on the side facing the limiting groove 221 to ensure full contact with the battery cell and improve the clamping effect.

[0060] Preferably, the end of the push block 67 installed in the first push groove 621 has an inclined surface, which is parallel to the inclined wall 6211 of the first push groove 621, so that the push block 67 and the first clamping block 62 form a straight surface contact, avoiding scratching the first clamping block 62.

[0061] In another embodiment, the limiting groove 221 can be rotated 90° and set on the edge of the placement block 22. When the battery cell to be tested is placed, the sides clamped by the first clamping block 62 and the second clamping block 64 are swapped, which can also achieve the same technical effect.

[0062] It should be noted that each test chamber 21 of the placement box 2 is provided with a set of clamping components 6.

[0063] Please refer to Figure 5 and Figure 7 The placement box 2 is connected to an air inlet pipe 7 and an air extraction pipe 8. The bottom of the test chamber 21 is provided with an air inlet 71 and an air extraction port 81 that communicate with the outside. The air inlet pipe 7 and the air extraction pipe 8 are connected to the test chamber 21 through the air inlet 71 and the air extraction port 81, respectively. The air inlet pipe 7 is connected to an external helium gas mechanism to supply helium gas to the battery cell. The air extraction pipe 8 is connected to an external vacuum pumping mechanism to evacuate the test chamber 21 to provide a test environment.

[0064] Specifically, each test chamber 21 is connected to an air inlet pipe 7 and an air extraction pipe 8.

[0065] It is worth mentioning that the driving component described in the embodiments of this utility model can be a cylinder or a motor, which can be selected according to actual needs.

[0066] Finally, it should be noted that in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0067] The various embodiments in this specification are described in a progressive manner. Each embodiment focuses on the differences from other embodiments. The various embodiments can be combined as needed, and the same or similar parts can be referred to each other.

[0068] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A cell helium inspection fixture based on eccentric rotation, characterized in that, include: The placement box includes at least one test chamber for placing the battery cell under test; A cover plate, configured to be slidable, is detachable and fits onto the placement box; An eccentric moving assembly, including an eccentrically rotatable eccentric rotating element; The eccentric rotating component can apply force to the cover plate to drive the cover plate to slide back and forth, thereby closing or separating the cover plate from the box.

2. The cell helium inspection fixture based on eccentric rotation according to claim 1, characterized in that, The eccentric moving component includes a fixed shaft and an opening / closing drive component; The fixed shaft passes through the eccentric rotating member, and the eccentric rotating member can rotate about the axis of the fixed shaft. One end of the eccentric rotating component is connected to the output end of the opening and closing drive component, and the other end is connected to the cover plate.

3. The cell helium inspection fixture based on eccentric rotation according to claim 2, characterized in that, The eccentric rotating component includes a rotating wheel and an eccentric rotating block; The rotating wheel is rotatably mounted on the fixed shaft; The eccentric rotating block is sleeved on the rotating wheel, one end of the eccentric rotating block is connected to the output end of the opening and closing drive component, and the other end is provided with a plug rod; The cover plate has a limiting groove, and the insertion rod is slidably inserted into the limiting groove.

4. The cell helium inspection fixture based on eccentric rotation according to claim 2, characterized in that, It also includes a frame, which has opposing upright plates, and a mounting groove is formed between the upright plates to accommodate the placement box. The mounting groove has a hollowed-out portion, and the fixing shaft is installed in the hollowed-out portion.

5. The cell helium inspection fixture based on eccentric rotation according to claim 4, characterized in that, The frame is equipped with guide rails and a lifting limit assembly; The guide rail is mounted on the vertical plate, and the cover plate is slidably mounted on the guide rail; The lifting and limiting assembly is located on one side of the guide rail. The lifting and limiting assembly includes a lifting drive and a lifting push block connected to the output end of the lifting drive.

6. The cell helium inspection fixture based on eccentric rotation according to claim 1, characterized in that, The test chamber is equipped with a placement block, which has a limiting groove for placing the battery cell under test.

7. The cell helium inspection fixture based on eccentric rotation according to claim 1, characterized in that, It also includes a clamping assembly for clamping the battery cell, the clamping assembly comprising a first slide rail, a first clamping block, a telescopic push rod, and a push drive component; The first slide rail is disposed inside the test cavity, and the first clamping block is slidably mounted on the first slide rail; An elastic element that can extend and retract along the length of the first slide rail is installed between the first clamping block and the inner wall of the test cavity. The telescopic push rod is slidably inserted through the placement box, with one end of the telescopic push rod extending into the test chamber and the other end connected to the output end of the push drive component; The movement path of the telescopic push rod is perpendicular to the movement path of the first clamping block.

8. The cell helium inspection fixture based on eccentric rotation according to claim 7, characterized in that, The portion of the telescopic push rod located within the test chamber is equipped with a push block. The first clamping block is provided with a first push groove, which has an inclined wall that is inclined relative to the sliding path of the first clamping block. One end of the push block is located within the first push groove.

9. The cell helium inspection fixture based on eccentric rotation according to claim 8, characterized in that, The clamping assembly further includes a second slide rail and a second clamping block; The second slide rail is disposed inside the test cavity and is perpendicular to the direction of the first slide rail; the second clamping block is slidably mounted on the second slide rail. An elastic element that can extend and retract along the direction of the second slide rail is installed between the second clamping block and the inner wall of the test cavity; The second clamping block is provided with a second push groove, and the end of the push block away from the first clamping block is located in the second push groove.

10. The cell helium inspection fixture based on eccentric rotation according to any one of claims 1-9, characterized in that, The placement box is connected to an air inlet pipe and an air extraction pipe, both of which are connected to the test chamber.

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