Nail suction assembly and sealing nail welding equipment

Abstract

The utility model discloses a nail suction assembly, which belongs to the field of lithium battery processing, and comprises a negative pressure cavity and a nail suction column, one end of the negative pressure cavity is connected with one end of the nail suction column and internally communicated with the same, the other end of the nail suction column is a profiling groove, the end face of the profiling groove comprises a plurality of nail suction holes, and the nail suction holes are communicated with the interior of the nail suction column. The nail suction assembly and the sealing nail welding equipment adopting the nail suction assembly have the advantages that it can be guaranteed that the sealing nails are completely attached to the whole surface when taken and placed, and meanwhile the welding quality and the appearance effect are guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of lithium battery production technology, and in particular to a sealing nail welding device. Background Technology

[0002] In recent years, the electric vehicle industry has developed rapidly, leading to an increasing demand for battery packs, a crucial component of electric vehicles. As one of the most important components of a battery pack, the stability of the internal structure of the battery cell production equipment is a critical guarantee for cell production. During the production of square aluminum-cased battery cells, electrolyte is added to the cell through an injection hole on the top cover in a dry environment. After injection, the injection hole is sealed with a sealing pin to completely isolate the cell's interior from the external environment.

[0003] In existing square battery cells, the sealing nail suction nozzle is in the form of an accordion-style suction cup when placing the sealing nail into the liquid injection port. Relying on the accordion-style suction cup as a buffer, the suction cup will deform due to aging and wear over time, resulting in crooked nails or nails falling off when picking up the sealing nails. When the sealing nail is crooked, it will cause the sealing nail to be lifted when it is placed into the liquid injection port of the battery cell, which will affect the quality of laser welding of the sealing nail during welding, and thus the weld appearance will not meet the requirements.

[0004] The information disclosed in this background section is intended only to enhance the understanding of the overall background of this utility model and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Utility Model Content

[0005] The technical problem to be solved by this utility model is: how to solve the problem that the sealing nails become crooked or fall off during the nail suction process due to the aging and wear of the suction cup, resulting in the welding quality not meeting the requirements.

[0006] This utility model solves the above-mentioned technical problems through the following technical means:

[0007] The nail suction assembly includes a negative pressure chamber and a nail suction column. One end of the negative pressure chamber is connected to one end of the nail suction column and the two are internally connected. The other end of the nail suction column is a contour groove. The end face of the contour groove includes multiple nail suction holes, which are internally connected to the nail suction column.

[0008] This invention features a contoured groove at the bottom of the nail-attracting post that is compatible with the sealing nail. The groove is filled with nail-attracting holes, which ensures that the sealing nail is completely attached to the entire surface when it is picked up or put down, while also ensuring welding quality and appearance.

[0009] Preferably, the contour of the contoured groove matches the upper contour of the sealing pin.

[0010] Preferably, the contour groove is an annular groove.

[0011] Preferably, the nail-attracting holes are distributed on the end face of the contour groove.

[0012] This utility model also discloses a sealing nail welding device, including a fixing plate, a cylinder assembly, and the aforementioned nail suction assembly; the fixed end of the cylinder assembly is fixedly connected to one side of the fixing plate, and the telescopic end of the cylinder assembly is connected to the top of the negative pressure chamber of the nail suction assembly.

[0013] Preferably, the cylinder assembly includes a cylinder body and a cylinder support plate; the fixed end of the cylinder body is connected to the cylinder support plate, and the cylinder support plate is connected to the top of one side of the mounting plate.

[0014] Preferably, it also includes a buffer mounting assembly, which includes a floating joint, a first mounting component, a spring, and a second mounting component connected in sequence; the top end of the floating joint is connected to the telescopic end of the cylinder assembly, and the bottom end of the second mounting component is provided with a nail suction assembly.

[0015] Preferably, it further includes at least one buffer and at least one buffer mounting plate, the buffer mounting plate being fixedly connected to the fixed plate, the buffer being connected to the buffer mounting plate, and the buffer being positioned on the travel path of the first mounting member.

[0016] The buffer can cushion the speed of the first mounting component, thereby reducing impact and component stress.

[0017] Preferably, a guide rail is also connected to one side of the fixed plate mounting cylinder assembly, and both the first mounting component and the second mounting component are slidably connected to the guide rail via sliders.

[0018] In this invention, when picking up and placing sealing nails, the floating joint adjusts the movement angle of the cylinder body within a certain range, and the deformation compensation mechanism generated by the spring prevents scratches on the surface of the sealing nails during the picking up and placing of the sealing nails; the first mounting part and the second mounting part move up and down on the guide rail, which plays a guiding and limiting role, and can ensure the stability during the up and down movement.

[0019] Preferably, it also includes a clamping block, one end of which is connected to the bottom end of the second mounting member, and the other end of which is connected to the nail suction assembly.

[0020] The advantages of this utility model are:

[0021] This invention features a contoured groove at the bottom of the nail-attracting post that is compatible with the sealing nail. The groove is filled with nail-attracting holes, which ensures that the sealing nail is completely attached to the entire surface when it is picked up or put down, while also ensuring welding quality and appearance.

[0022] The buffer can cushion the speed of the first mounting component, thereby reducing impact and component stress.

[0023] In this invention, when picking up and placing sealing nails, the floating joint adjusts the movement angle of the cylinder body within a certain range, and the deformation compensation mechanism generated by the spring prevents scratches on the surface of the sealing nails during the picking up and placing of the sealing nails; the first mounting part and the second mounting part move up and down on the guide rail, which plays a guiding and limiting role, and can ensure the stability during the up and down movement. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of the nail suction assembly according to an embodiment of the present invention;

[0025] Figure 2 This is a schematic diagram of the structure of the nail suction assembly according to an embodiment of the present invention;

[0026] Figure 3 This is a cross-sectional view of the nail suction assembly according to an embodiment of this utility model;

[0027] Figure 4 This is a schematic diagram of the working operation of the nail suction assembly according to an embodiment of this utility model;

[0028] Figure 5 This is a perspective view of the sealing nail welding equipment according to an embodiment of the present invention;

[0029] Figure 6 This is a front view of the sealing nail welding equipment according to an embodiment of this utility model;

[0030] Figure 7 This is a side view of the sealing nail welding equipment according to an embodiment of the present invention;

[0031] Figure 8 This is a schematic diagram of the contact between the first mounting component and the buffer below in an embodiment of this utility model;

[0032] Figure 9 This is a schematic diagram of the contact between the first mounting component and the buffer above in an embodiment of this utility model;

[0033] Numbering on the map:

[0034] 1. Nail suction assembly; 11. Negative pressure chamber; 12. Nail suction post; 121. Contouring groove; 122. Nail suction hole; 13. Fixing post;

[0035] 2. Sealing nails;

[0036] 3. Fixing plate;

[0037] 4. Cylinder assembly; 41. Cylinder body; 42. Cylinder support plate;

[0038] 5. Buffer mounting assembly; 51. Floating joint; 52. First mounting component; 53. Spring; 54. Second mounting component; 55. Slider;

[0039] 6. Clamping block;

[0040] 7 and 7' represent buffers at different positions;

[0041] 8 and 8' represent buffer mounting plates at different positions. Detailed Implementation

[0042] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below in conjunction with the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0043] Example 1:

[0044] like Figure 1 , Figure 2 As shown, the nail suction assembly 1 includes a negative pressure chamber 11 and a nail suction column 12. The bottom of the negative pressure chamber 11 is connected to the top of the nail suction column 12, and the two are internally connected. The side of the negative pressure chamber 11 is connected to the negative pressure system. The bottom end of the nail suction column 12 is a contour groove 121. The end face of the contour groove 121 includes a plurality of nail suction holes 122, and the nail suction holes 122 are internally connected to the nail suction column 12.

[0045] Specifically, in this embodiment, referring to Figure 3 , Figure 4 , Figure 5 As shown, the negative pressure chamber 11 has a rectangular cavity structure. A connection hole is provided on the side of the negative pressure chamber 11, and a connector is connected to the connection hole. The connector can be connected to the negative pressure system. When the negative pressure system is working, the suction column 12 can attract the sealing nail 2 under negative pressure conditions, and the external moving system can move the sealing nail 2, thereby realizing the removal and placement of the sealing nail 2. This embodiment is not limited to the specific structural form of the negative pressure chamber 11. The negative pressure chamber 11 can also be other shapes, such as cylindrical, trapezoidal, or a combination of shapes, or it can be formed by the upward extension of the suction column 12; as long as a good negative pressure effect can be produced. The external moving system and the negative pressure system are existing technologies and will not be described in detail here.

[0046] Also refer to Figure 3 , Figure 4 As shown, in this embodiment, the suction pin 12 is a cylindrical structure, and the contour groove 121 is an annular groove, which matches the upper structure of the sealing pin 2.

[0047] It should be noted that, in this embodiment, the matching of the contour of the contour groove 121 with the upper contour of the sealing nail 2 means that the shape and size of the contour groove 121 are approximately the same as the upper part of the sealing nail 2. For example, in this embodiment, the contour groove 121 is an annular groove, roughly in the shape of a frustum, and the upper part of the sealing nail 2 is also a frustum structure, so the two are consistent in shape. Of course, this embodiment is not limited to the shape of the contour groove 121. If the top of the sealing nail 2 is cylindrical, the contour groove 121 can also be changed to a cylindrical cavity, as long as the two are matched. The two can be the same size or have a small gap (the contour groove 121 is 1-2 mm larger on one side than the upper part of the sealing nail 2). The small gap is to accommodate the process error during the processing of the sealing nail 2. The matching of the contour groove 121 with the sealing nail 2 allows the sealing nail 2 to better match the contour groove 121, making the adsorption process more stable, preventing the sealing nail 2 from tilting or falling off, and ensuring the welding quality in the later stage.

[0048] In this embodiment, the nail-attracting holes 122 are distributed on the end face of the contour groove 121. Preferably, the nail-attracting holes 122 are evenly or dispersedly arranged to ensure uniform adsorption force. The number of nail-attracting holes 122 is multiple, preferably 10-20. The nail-attracting holes 122 are preferably circular holes with a diameter preferably 0.5±0.1mm. The nail-attracting holes 122 are preferably arranged vertically (with the central axis vertical), but can also be arranged at an angle (with the central axis inclined). This embodiment is not limited to the specific number, diameter, and shape of the nail-attracting holes 122; the optimal arrangement can be chosen based on actual usage. Of course, it is important to ensure that the arrangement of the nail-attracting holes 122 does not affect the rigidity of the end face of the contour groove 121, and to avoid the end face deforming under negative pressure conditions, which would prevent the nail-attracting force from being applied.

[0049] The outermost suction hole 122 covers more than 50% of the diameter of the top surface of the sealing nail 2 to ensure the reliability of the suction.

[0050] refer to Figure 3 , Figure 5 As shown, a fixing post 13 is connected to the top of the negative pressure chamber 11. The fixing post 13 can be clamped by the clamping block 6 to fix the entire suction nail assembly 1. In this embodiment, the fixing post 13 is a cylindrical structure. This embodiment is not limited to the specific shape of the fixing post 13, as long as it can maintain a connection with the clamping block 6 or other components.

[0051] In this embodiment, the nail-catching column 12 can be made of steel, which, through surface treatment, is wear-resistant and not easily deformed or aged over long-term use. The nail-catching assembly 1 is manufactured according to the shape of the sealing nail 2, with nail-catching holes 122 covering the entire surface to ensure complete contact with the entire surface when the sealing nail 2 is picked up or placed, while also ensuring welding quality and aesthetic appearance.

[0052] Example 2:

[0053] like Figure 5As shown, the sealing nail welding equipment includes a fixed plate 3, a cylinder assembly 4, a buffer mounting assembly 5, and the nail-attracting assembly 1 in the above embodiment 1; the outer cylinder of the cylinder assembly 4 is connected to the fixed plate 3, which can be done by welding or bolting. The telescopic end 411 of the cylinder assembly 4 is connected to the top end of the buffer mounting assembly 5, the bottom end of the buffer mounting assembly 5 is provided with the nail-attracting assembly 1, and the side of the buffer mounting assembly 5 is slidably connected to the fixed plate 3.

[0054] Specifically, such as Figure 5 , Figure 6 , Figure 7 As shown, the fixing plate 3 is vertically arranged, and the cylinder assembly 4 includes a cylinder body 41 and a cylinder support plate 42. The cylinder support plate 42 is an L-shaped support plate. The outer cylinder of the cylinder body 41 is fixedly connected to the horizontal plate of the L-shaped support plate by welding or bolting. The vertical plate of the L-shaped support plate is fixedly connected to the fixing plate 3 by bolts.

[0055] The buffer mounting assembly 5 includes a floating joint 51, a first mounting member 52, a spring 53, and a second mounting member 54; the telescopic end 411 of the cylinder body 41 is connected to the top end of the floating joint 51, the bottom end of the floating joint 51 is connected to the top end of the first mounting member 52, the bottom end of the first mounting member 52 is connected to the top end of the spring 53, the bottom end of the spring 53 is connected to the top end of the second mounting member 54, and the bottom end of the second mounting member 54 is connected to the suction pin assembly 1.

[0056] It should be noted that the bottom of the second mounting component 54 is provided with a nail suction assembly 1. The bottom of the second mounting component 54 can be directly connected to the nail suction assembly 1, or the second mounting component 54 can be indirectly connected to the nail suction assembly 1 through other structures.

[0057] The floating joint 51 allows the piston rod to have a certain degree of offset and angle adjustment during operation, thereby ensuring the normal operation of the system and extending the service life of the equipment.

[0058] During the downward movement of the entire buffer mounting assembly 5, as the nail suction assembly 1 gradually approaches the sealing nail 2 and holds it in place by negative pressure, scratches can easily occur if the contact between the nail suction assembly 1 and the sealing nail 2 is rigid. In this embodiment, a spring 53 is used to buffer this rigid contact. That is, when the nail suction assembly 1 presses against the sealing nail 2, there is an upward reaction force against the rigid contact force, which buffers the impact and reduces the damage to the sealing nail 2 caused by this rigid contact force.

[0059] Additional explanation: In this embodiment, the spring 52 is approximately aligned with the central axis of the nail suction assembly 1. The number of springs 52 can be increased accordingly, but at least one spring 52 that is approximately aligned with the central axis of the nail suction assembly 1 is required. When the number of springs 52 is increased, it is preferable that the positions of the springs 52 are evenly distributed and that each spring 52 has the same specifications to achieve uniform buffering.

[0060] like Figure 7 As shown, the first mounting member 52 is generally a C-shaped structure with an opening on one side. The vertical plate portion of the first mounting member 52 is slidably connected to the fixing plate 3, and the length of the top horizontal plate of the first mounting member 52 is greater than that of the bottom horizontal plate. The second mounting member 54 is an inverted L-shaped structure, and the vertical plate portion of the second mounting member 54 is slidably connected to the fixing plate 3.

[0061] One side of the fixing plate 3 is fixedly connected to the guide rail 31 by bolts. The vertical plate portions of the first mounting member 52 and the second mounting member 54 are both fixedly connected to the slider 55. The slider 55 is slidably connected to the guide rail 31, so that both the first mounting member 52 and the second mounting member 54 can be slidably connected to the guide rail 31 of the fixing plate 3. In this embodiment, the way the guide rail 31 and the slider 55 are slidably connected can refer to the prior art, and this embodiment is not limited to the cross-sectional shape of the guide rail 31.

[0062] In this embodiment, after the module moves to the nail-removing position, the cylinder body 41 drives the nail-suction assembly 1 to descend to the nail-removing position, vacuum-suctioning the sealing nail 2. The cylinder body 41 rises, the module moves to the sealing nail position on the battery cell, CCD takes a picture, the cylinder body 41 descends, the vacuum is broken, and the sealing nail 2 is placed into the battery cell's electrolyte inlet. The module moves back to the sealing nail 2 removal position, and the above operation is repeated. In this embodiment, the floating joint 51 adjusts the movement angle of the cylinder body 41 within a certain range when removing and placing the sealing nail 2. The deformation compensation mechanism generated by the spring 53 prevents scratches on the surface of the sealing nail 2 when removing and placing the sealing nail 2. The first mounting part 52 and the second mounting part 54 move up and down on the guide rail 31. The guide rail 31 plays a guiding and limiting role, ensuring the stability of the first mounting part 52 and the second mounting part 54 during the up and down movement.

[0063] Example 3:

[0064] like Figure 6 , Figure 7 As shown, in this embodiment, the second mounting member 54 is connected to the nail suction assembly 1 via the clamping block 6. Specifically, the bottom of the second mounting member 54 is connected to the top of the clamping block 6, and the bottom of the clamping block 6 is then connected to the top of the nail suction assembly 1.

[0065] The clamping block 6 has an L-shaped block structure. The vertical plate of the clamping block 6 is connected to the bottom of the second mounting part 54 by bolts. The horizontal plate of the clamping block 6 has a through hole in the vertical direction. An elastic notch 61 is also provided between the through hole and the side of the clamping block 6. A locking threaded hole is also provided along the horizontal direction of the elastic notch 61, which passes through the elastic notch 61. When the fixing post 13 at the top of the nail suction assembly 1 is inserted into the through hole, the bolt is inserted and connected in the locking threaded hole to reduce the elastic notch 61, thereby locking the fixing post 13.

[0066] This embodiment is not limited to the specific way in which the fixing post 13 is fixed to the clamping block 6. As long as it can be fixed, it is acceptable. For example, the fixing post 13 can be directly fixed to the clamping block 6 with bolts, which makes it easy to replace the fixing post 13; or the fixing post 13 can be welded to the clamping block 6 to ensure the reliability of the connection.

[0067] Example 4:

[0068] like Figure 4 , Figure 5 , Figure 6 As shown, based on the above embodiment 2 or embodiment 3, the sealing nail welding equipment further includes at least one buffer 7 and at least one buffer mounting plate 8. The buffer 7 is connected to the buffer mounting plate 8, and the buffer mounting plate 8 is fixedly connected to the fixing plate 3. The buffer 7 is located on the travel path of the first mounting member 52.

[0069] Specifically, this embodiment includes a buffer 7 and a buffer mounting plate 8 located above the first mounting member 52, and a buffer 7' and a buffer mounting plate 8' located below the first mounting member 52. Both buffer mounting plates 8 and 8' are U-shaped bracket structures. Specifically, minor dimensional or structural deformations are permitted on the two buffer mounting plates 8 and 8', provided they can accommodate the buffers 7 and 7' without interfering with the telescopic end 411 and the buffer mounting assembly 5. Both buffer mounting plates 8 and 8' are placed horizontally and are spaced apart vertically. After both buffer mounting plates 8 and 8' are fixedly connected to the fixing plate 3 by bolts or welding, through spaces are formed between the buffer mounting plates 8 and 8' and the fixing plate 3.

[0070] The damper mounting plate 8, located above the first mounting member 52, is installed in the middle of the cylinder body 41. The telescopic rod of the cylinder body 41 can move along the through space without interfering with the damper mounting plate 8. The side of the damper mounting plate 8 away from the fixed plate 3 extends outward to form a rectangular mounting block, and the damper 7 is installed at the rectangular mounting block.

[0071] The buffer mounting plate 8', located below the first mounting member 52, is installed near the spring 53. The first mounting member 52, the spring 53, and the second mounting member 54 can all move along the through space of the buffer mounting plate 8' without interfering with it. The side of the buffer mounting plate 8' away from the fixed plate 3 extends outward to form a rectangular mounting block, and the buffer 7' is installed at the rectangular mounting block.

[0072] The buffer 7 and buffer 7' are arranged opposite each other, meaning that their impact-bearing heads are close together and they are located on the moving path of the first mounting member 52. Both buffer 7 and buffer 7' are arranged approximately perpendicularly. Figure 7 , 8 As shown, when the entire buffer mounting assembly 5 moves downward, the bottom surface of the top horizontal plate of the first mounting member 52 can contact the impact head of the buffer 7', thus achieving buffering; Figure 9 As shown, when the entire buffer mounting assembly 5 moves upward, the top surface of the first mounting member 52 can contact the impact head of the buffer 7 to achieve buffering.

[0073] In this embodiment, buffer 7 is a hydraulic buffer. A hydraulic buffer is a device that utilizes the viscous damping effect generated by fluid flow to convert part of the impact energy through a throttling orifice, thereby reducing rigid collisions. In this embodiment, the number of buffers 7 and 7' can also be increased to achieve a better buffering effect.

[0074] It should be noted that this embodiment is not limited to the specific formation of the buffer mounting plates 8 and 8'. They can also be straight plates, L-shaped plates, etc., as long as they can meet the requirements for mounting the buffers 7 and 7' and do not interfere with other structural components.

[0075] In this embodiment, the speed of the buffers 7 and 7' is gradually reduced after they come into contact with the first mounting component 52, thereby reducing the impact force and component stress.

[0076] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A nail-attracting assembly, characterized in that, It includes a negative pressure chamber and a nail-attracting column. One end of the negative pressure chamber is connected to one end of the nail-attracting column and the two are internally connected. The other end of the nail-attracting column is a contour groove. The end face of the contour groove includes multiple nail-attracting holes, which are internally connected to the nail-attracting column.

2. The nail suction assembly according to claim 1, characterized in that, The contour of the groove matches the upper contour of the sealing pin.

3. The nail suction assembly according to claim 1, characterized in that, The contour groove is an annular groove.

4. The nail suction assembly according to claim 1, characterized in that, The nail-attracting holes are distributed on the end face of the contour groove.

5. A sealing nail welding equipment, characterized in that, It includes a fixing plate, a cylinder assembly, and a nail-suction assembly according to any one of claims 1-4; the fixed end of the cylinder assembly is fixedly connected to one side of the fixing plate, and the telescopic end of the cylinder assembly is connected to the top of the negative pressure chamber of the nail-suction assembly.

6. The sealing nail welding equipment according to claim 5, characterized in that, The cylinder assembly includes a cylinder body and a cylinder support plate; the fixed end of the cylinder body is connected to the cylinder support plate, and the cylinder support plate is connected to the top of one side of the fixed plate.

7. The sealing nail welding equipment according to claim 5, characterized in that, It also includes a buffer mounting assembly, which includes a floating joint, a first mounting component, a spring, and a second mounting component connected in sequence; the top of the floating joint is connected to the telescopic end of the cylinder assembly, and the bottom of the second mounting component is provided with a nail suction assembly.

8. The sealing nail welding equipment according to claim 7, characterized in that, It also includes at least one buffer and at least one buffer mounting plate, the buffer mounting plate being fixedly connected to the fixed plate, the buffer being connected to the buffer mounting plate, and the buffer being positioned on the travel path of the first mounting component.

9. The sealing nail welding equipment according to claim 7, characterized in that, The side of the fixed plate that mounts the cylinder assembly is also connected to a guide rail, and both the first and second mounting parts are slidably connected to the guide rail via sliders.

10. The sealing nail welding equipment according to claim 7, characterized in that, It also includes a clamping block, one end of which is connected to the bottom end of the second mounting component, and the other end of which is connected to the nail suction assembly.

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