Pole welding and pressing device

Abstract

The utility model discloses a pole welding hold-down device which comprises a supporting table top used for positioning a battery top cover and a hold-down mechanism located above the supporting table top, the hold-down mechanism comprises a downward pressing part capable of ascending and descending relative to the supporting table top, and the downward pressing part is provided with a through hole corresponding to a pole mounting hole of the battery top cover. An annular rotating disc is rotationally connected in the through hole, a lower pressing head is arranged in the center of the annular rotating disc, is connected to the annular rotating disc through a connecting arm and rotates along with the annular rotating disc, a cap is arranged between the lower pressing head and the pole in the pole mounting hole, and the lower pressing head is pressed down to the cap, so that the cap covers the pole and isolates a welding area of the pole out of the cap. According to the utility model, high-temperature splashes generated during welding are prevented from being splashed to the post terminal.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and in particular to a terminal welding and clamping device. Background Technology

[0002] Lithium-ion batteries are one of the main power sources for electric vehicles. The top cover of a lithium-ion battery is a crucial component, featuring mounting holes for securing the terminals. After the terminals are installed in these holes, they need to be welded to the top cover. The connection line between the annular bottom of the terminal and the edge of the mounting hole serves as the welding line, and welding is then performed along this line to secure the battery. Because the welding line is close to the protrusion of the terminal, high-temperature spatter generated during welding can splash onto the protrusion and damage the terminal. Furthermore, the strong light generated during welding can easily affect the terminal's performance. Therefore, a device is urgently needed to protect the terminals during the welding process. Utility Model Content

[0003] The purpose of this utility model is to design a pole welding and clamping device to overcome the shortcomings of the above-mentioned technology.

[0004] This utility model designs a terminal welding and clamping device, including a support platform for positioning a battery top cover and a clamping mechanism located above the support platform. The clamping mechanism includes a pressing part that can be raised and lowered relative to the support platform. The pressing part has a through hole corresponding to the terminal on the battery top cover. An annular turntable is rotatably connected in the through hole. A pressing head is provided at the center of the annular turntable. The pressing head is connected to the annular turntable through a connecting arm and rotates with the annular turntable. A cap is provided between the pressing head and the terminal on the battery top cover. The pressing head presses down to the cap, and the cap covers at least a portion of the terminal on the battery top cover to isolate the welding area of ​​the terminal outside the cap.

[0005] Preferably, the pressing head includes a shaft, the top end of which is connected to a connecting arm. The bottom end of the shaft has a first blind hole and a second blind hole. The first blind hole is located at the center of the bottom end of the shaft. At least two second blind holes are distributed circumferentially along the first blind hole. A first pressing post is installed in the first blind hole. The first pressing post has an axial through hole corresponding to the second blind hole. A second pressing post is slidably assembled in each second blind hole. An elastic element is provided between the top end of the second pressing post and the second blind hole. The bottom end of the second pressing post passes through the axial through hole to form a pressing end and presses down onto the cap.

[0006] Preferably, the annular turntable includes a flange, a gear turntable, and a flange fixing plate arranged coaxially. The inner wall of the through hole is provided with an annular protrusion. The two flanges are respectively installed above and below the annular protrusion. The two flange fixing plates are respectively located at the top and bottom of the two flanges to limit the movement of the two flanges. The gear turntable is sleeved inside the flange and connected to the flange fixing plate above it, so that the gear turntable can rotate axially relative to the flange. One end of the connecting arm is connected to the inner wall of the gear turntable, and the other end extends to the center of the through hole to connect to the lower pressure head.

[0007] In a further optimization, the pressing mechanism also includes a rack that is slidably disposed on the pressing part and meshes with the gear of the gear turntable, and the pressing part is also provided with a telescopic drive member for driving the rack to slide back and forth.

[0008] Further optimization involves a protective cover at the bottom of the flange fixing plate located below. The protective cover has openings at both ends, and its top end communicates with the through hole. The bottom end of the protective cover is pressed down by the pressing head to the surface of the battery top cover, covering the cap and welding area together.

[0009] Further optimizations include a support frame and a lifting drive unit located on the support frame. The lifting end of the lifting drive unit is connected to the pressing part to drive the pressing part to move up and down relative to the support platform.

[0010] Further optimization involves providing two through holes in the pressing section, each corresponding to one of the two terminal mounting holes on the battery top cover. Each through hole is equipped with an annular turntable, a pressing head, and a protective cover. There are two racks, telescopic drive components, and lifting drive components.

[0011] Preferably, the system also includes a fixed frame, on which the support platform is mounted. A guide rail is provided below the fixed frame, and a slider that slides with the guide rail is provided at the bottom of the fixed frame, so that the support platform can be adjusted along the extension direction of the guide rail.

[0012] Further optimization involves a mounting plate on the support platform, with the battery top cover placed on the surface of the mounting plate. The surface of the mounting plate has protrusions for supporting the battery top cover. The mounting plate has multiple positioning blocks along the edge of the battery top cover, which abut against the side of the battery top cover to position it.

[0013] Further optimization involves providing a mounting block for the pressing part, a sliding groove on the mounting block, a sliding part for the rack that slides into the sliding groove, and a telescopic drive connected to one end of the rack to drive the rack to slide back and forth along the sliding groove.

[0014] The technical advantages of this invention are as follows: By covering the terminal post with a cap, and having a pressing part above the cap, the pressing head of the pressing part presses the cap tightly from top to bottom. The bottom opening of the cap abuts against the annular bottom of the terminal post, thus isolating the welding line formed between the outer wall of the annular bottom of the terminal post and the inner wall of the mounting hole of the battery top cover. This prevents high-temperature spatter generated during welding from splashing onto the terminal post and causing damage, and also prevents laser irradiation onto the terminal post. A protective cover is provided at the bottom of the pressing head, and both the cap and the welding line are covered by the protective cover, allowing the welding fumes to be discharged through the through hole along the protective cover. This enables the fumes to be centrally discharged into the smoke exhaust system, preventing the fumes from spreading into the working environment and avoiding health risks to workers due to fumes in the working environment. Attached Figure Description

[0015] Figure 1 It is a three-dimensional overall structure Figure 1 .

[0016] Figure 2 It is a three-dimensional overall structure Figure 2 .

[0017] Figure 3 It was a structural explosion between the pressure section and the support platform. Figure 1 .

[0018] Figure 4 It was a structural explosion between the pressure section and the support platform. Figure 2 .

[0019] Figure 5 This is a structural diagram of the pressure head.

[0020] Figure 6 This is an exploded view of the structure of the annular turntable.

[0021] Figure 7 This is a cross-sectional view of the structure when the pressure head presses the cap tightly.

[0022] In the diagram: 1. Battery top cover; 11. Terminal mounting hole; 12. Terminal; 2. Support platform; 21. Mounting plate; 22. Boss; 23. Positioning block; 3. Clamping mechanism; 31. Pressing part; 311. Through hole; 312. Ring protrusion; 32. Annular turntable; 321. Flange; 322. Gear turntable; 323. Flange fixing plate; 324. Connecting arm; 33. Pressing head; 331. Shaft; 33 2. First blind hole; 333. Second blind hole; 334. First pressing post; 335. Axial through hole; 336. Second pressing post; 337. Elastic element; 34. Rack; 341. Sliding part; 4. Cap; 5. Welding area; 6. Telescopic drive component; 7. Protective cover; 8. Support frame; 9. Lifting drive component; 10. Fixing frame; 13. Guide rail; 14. Slider; 15. Mounting block; 151. Slide groove. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model are within the protection scope of the present utility model.

[0024] like Figure 1 and 2As shown, this utility model includes a support platform 2 and a pressing mechanism 3. The support platform 2 is used to position the battery top cover 1. The pressing mechanism 3 is located above the support platform 2 and includes a pressing part 31 that can be raised and lowered relative to the support platform 2, so that the pressing part 31 can press down onto the battery top cover 1. The pressing part 31 has a through hole 311 corresponding to the terminal mounting hole 11 of the battery top cover 1. An annular turntable 32 is rotatably connected inside the through hole 311. The annular turntable 32 includes a flange 321, a gear turntable 322 and a flange fixing plate 323 arranged on the same central axis. The inner wall of the through hole 311 has an annular protrusion 312. Two flanges 321 are respectively sleeved and installed above and below the annular protrusion 312. Two flange fixing plates 323 are respectively located on top of the two flanges 321. The top and bottom of the device limit the movement of two flanges 321. A gear disc 322 is fitted inside the flange 321 and connected to the upper flange fixing disc 323. The upper flange fixing disc 323 is fixedly connected to the gear disc 322 by fasteners, and the lower flange fixing disc 323 is fixedly connected to the pressing part 31 by fasteners. The two flange fixing discs 323 limit the movement of the flange 321 and gear disc 322, allowing the gear disc 322 to rotate axially relative to the flange 321. One end of the connecting arm 324 is connected to the inner wall of the gear disc 322, and the other end extends to the center of the through hole 311, connecting to the pressing head 33. The pressing part 31 drives the annular disc 32 to rise and fall, causing the pressing head 33 to press down onto the terminal post 12 of the battery top cover 1. At this location, the flange 321, gear turntable 322, and flange fixing plate 323 are all axially penetrating structures, allowing the welding energy emitted by the welding equipment, such as the welding laser, to pass through the flange 321, gear turntable 322, and flange fixing plate 323 from top to bottom before reaching the welding area 5 to weld the electrode 12. It should be noted that, since the electrode 12 is cylindrical, the welding area 5 between the annular bottom outer wall of the electrode 12 and the inner wall of the electrode mounting hole 11 on the battery top cover 1 is a circular seam. The welding equipment moves along the trace of the welding area 5 to perform laser welding. The lower pressure head 33 is located in the center of the through hole 311 and requires a connecting arm 324 for fixed connection. The connecting arm 324 will interfere with the circular welding; therefore, a gear turntable is required. The connecting arm 324 is fixed to the gear turntable 322. As the gear turntable 322 rotates, the connecting arm 324 can also rotate, thus avoiding interference with the circular welding. A cap 4 is provided between the pressing head 33 and the pole 12 in the pole mounting hole 11. The pole 12 is first placed in the pole mounting hole 11. The cap 4 is placed on the pole 12 before the pressing head 33 presses down. The pressing head 33 presses down to the cap 4 to press it down. A welding line, i.e., the welding area 5, is formed between the annular bottom edge of the pole 12 and the top edge of the pole mounting hole 11. After the cap 4 covers the pole 12, the welding line is outside the cap 4, that is, the welding area 5 is isolated outside the cap 4, so that the spatter particles generated during welding will not splash onto the pole 12, avoiding damage to the pole 12.Furthermore, it can isolate the high temperatures generated during welding from the electrode post 12 to a certain extent, while also isolating the intense light produced during welding.

[0025] Furthermore, the pressing head 33 includes a shaft 331, the top end of which is fixedly connected to the connecting arm 324. The shaft 331 is axially arranged along the through hole 311. A first blind hole 332 and a second blind hole 333 are formed at the bottom end of the shaft 331. The first blind hole 332 is located at the center of the bottom end of the shaft 331. At least two second blind holes 333 are circumferentially distributed along the first blind hole 332. A first pressing post 334 is installed in the first blind hole 332. The first pressing post 334 has axial through holes 335 corresponding to the second blind holes 333. A second pressing post 336 is assembled in each second blind hole 333. An elastic element 337 is provided between the top end of the second pressing post 336 and the second blind hole 333. The elastic element 337 can be a spring. Figure 5 and 7 As shown, the bottom end of the second pressing post 336 passes through the axial through hole 335 to form a pressing end and presses down onto the cap 4. The second pressing post 336 forms an elastic pressing end through the elastic element 337 to avoid damaging the cap 4 when pressing down. It can also adapt to various situations where there is a height difference between the top surface of the cap 4 and the top surface of the pole post 12.

[0026] Furthermore, the cap 4 is a cylindrical cap structure with an open end at the bottom. The open end of the cap 4 abuts against the annular bottom surface of the pole post 12. In this embodiment, an opening is also provided at the center of the top of the cap 4. The middle part of the bottom end of the first pressing post 334 is protruding and passes through the top opening of the cap 4 to abut against the top of the pole post 12, which can play a certain positioning role for the pole post 12.

[0027] Furthermore, such as Figure 6 As shown, the clamping mechanism 3 also includes a rack 34 disposed on the pressing part 31 and meshing with the gear of the gear turntable 322. A mounting block 15 is fixed to the bottom of the pressing part 31. A sliding groove 151 is provided on the mounting block 15. The rack 34 is provided with a sliding part 341. The sliding part 341 has teeth that mesh with the gear turntable 322 along the direction of the sliding groove 151. The sliding part 341 and the sliding groove 151 form a sliding fit, such as... Figure 4 As shown, the pressing part 31 is also provided with a telescopic drive member 6. The telescopic end of the telescopic drive member 6 is connected to one end of the rack 34, thereby driving the rack 34 to slide back and forth along the slide groove 151. The rack 34 controls the rotation of the gear turntable 322, and finally realizes the rotation of the connecting arm 324, thereby avoiding interference welding.

[0028] Furthermore, such as Figure 7As shown, a protective cover 7 is provided at the bottom of the flange fixing plate 323 located below. The protective cover 7 has openings at both ends. The top of the protective cover 7 communicates with the through hole 311. After the bottom of the protective cover 7 is pressed down to the surface of the battery top cover 1 by the pressing head 33, it covers the cap 4 and the welding area 5 together, so that the welding fumes can flow out along the through hole 311 instead of spreading along the battery top cover 1, thereby preventing the fumes particles from adhering to the surface of the battery top cover 1. In this embodiment, the cross-sectional shape of the protective cover 7 is circular. The protective cover 7 has a trumpet-shaped cylindrical structure with a small bottom and a large top, which plays a certain guiding role for the fumes.

[0029] This utility model also includes a support frame 8 and a lifting drive component 9 located on the support frame 8. The lifting end of the lifting drive component 9 is connected to the pressing part 31 to drive the pressing part 31 to lift relative to the support platform 2. In this embodiment, the lifting drive component 9 includes a cylinder or hydraulic cylinder fixed on the support frame 8. The telescopic end of the cylinder or hydraulic cylinder is set upward to form a lifting end. The pressing part 31 is a horizontally arranged plate structure. The two ends of the pressing part 31 are respectively provided with the support frame 8 and the lifting drive component 9. The lifting ends of the two lifting drive components 9 are connected to the bottom horizontal sides of the pressing part 31. The pressing part 31 is lifted and lowered under the drive of the two lifting drive components 9, so that the pressing part 31 can rise and fall horizontally.

[0030] Furthermore, the pressing part 31 has two through holes 311, which correspond one-to-one with the two terminal mounting holes 11 on the battery top cover 1. Each through hole 311 is equipped with an annular turntable 32, a pressing head 33, and a protective cover 7. There are two racks 34, telescopic drive 6, and lifting drive 9. This allows the two terminals 12 on the same battery top cover 1 to be pressed simultaneously, thereby enabling simultaneous welding and improving work efficiency.

[0031] This utility model also includes a fixing frame 10, a support platform 2 is disposed on the fixing frame 10, a guide rail 13 is provided below the fixing frame 10, and a slider 14 is provided at the bottom of the fixing frame 10 to form a sliding engagement with the guide rail 13, so that the support platform 2 can be displaced and adjusted along the extension direction of the guide rail 13, thereby facilitating welding.

[0032] Furthermore, such as Figure 3 As shown, a mounting plate 21 is provided on the support platform 2, and the battery top cover 1 is placed on the surface of the mounting plate 21. The surface of the mounting plate 21 is provided with a boss 22 for supporting the battery top cover 1. The mounting plate 21 is provided with a plurality of positioning blocks 23 along the edge of the battery top cover 1. The positioning blocks 23 abut against the side of the battery top cover 1 to position the battery top cover 1. The boss 22 can support battery top covers 1 of different sizes.

[0033] Furthermore, the telescopic drive component 6 and the lifting drive component 9 can be cylinders, hydraulic cylinders, or electric telescopic rods.

[0034] This utility model is not limited to the above-described preferred embodiments. Anyone can derive other forms of products under the guidance of this utility model. However, regardless of any changes made in their shape or structure, any technical solution that is the same as or similar to this application falls within the protection scope of this utility model.

Claims

1. A pole welding and compression device, characterized in that, The application relates to a battery top cover positioning device, which comprises a supporting table (2) for positioning a battery top cover (1) and a pressing mechanism (3) above the supporting table (2), wherein the pressing mechanism (3) comprises a lower pressing part (31) capable of ascending and descending relative to the supporting table (2), the lower pressing part (31) is provided with a through hole (311) corresponding to a pole (12) on the battery top cover (1), a ring-shaped rotating disc (32) is rotatably connected in the through hole (311), a lower pressing head (33) is arranged at the center of the ring-shaped rotating disc (32), the lower pressing head (33) is connected to the ring-shaped rotating disc (32) through a connecting arm (324) and rotates with the ring-shaped rotating disc (32), a cap (4) is arranged between the lower pressing head (33) and the pole (12) on the battery top cover (1), the lower pressing head (33) presses the cap (4), and the cap (4) covers at least part of the pole (12) on the battery top cover (1) to isolate a welding area (5) of the pole (12) from the cap (4).

2. A pole clamp welding and compression device according to claim 1, wherein, The lower pressing head (33) comprises a shaft body (331), the top end of the shaft body (331) is connected to the connecting arm (324), the bottom end of the shaft body (331) is provided with a first blind hole (332) and a second blind hole (333), the first blind hole (332) is arranged at the center of the bottom end of the shaft body (331), at least two second blind holes (333) are distributed in a ring shape along the first blind hole (332), a first lower pressing column (334) is arranged in the first blind hole (332), the first lower pressing column (334) is provided with an axial through hole (335) corresponding to the second blind hole (333), a second lower pressing column (336) is slidably arranged in each second blind hole (333), an elastic element (337) is arranged between the top end of the second lower pressing column (336) and the second blind hole (333), and the bottom end of the second lower pressing column (336) penetrates through the axial through hole (335) to form a lower pressing end which presses the cap (4).

3. A pole clamp welding press according to claim 1, wherein The ring-shaped rotating disc (32) comprises a flange disc (321), a gear rotating disc (322) and a flange fixing disc (323) arranged on the same center axis, the inner wall of the through hole (311) is provided with a ring protrusion (312), two flange discs (321) are arranged above and below the ring protrusion (312) respectively, two flange fixing discs (323) are arranged at the top and bottom of the two flange discs (321) to limit the two flange discs (321), the gear rotating disc (322) is sleeved in the flange disc (321) and connected with the upper flange fixing disc (323), so that the gear rotating disc (322) can axially rotate relative to the flange disc (321), one end of the connecting arm (324) is connected to the inner wall of the gear rotating disc (322), and the other end extends to the central position of the through hole (311) to connect the lower pressing head (33).

4. A pole clamp welding press according to claim 3, wherein The pressing mechanism (3) further comprises a rack (34) slidably arranged on the lower pressing part (31) and engaged with the gear of the gear rotating disc (322), and the lower pressing part (31) is further provided with a telescopic driving element (6) for driving the rack (34) to reciprocatingly slide.

5. A pole clamp welding press according to claim 4, wherein The bottom of the flange fixing disc (323) is provided with a protective cover (7), the two ends of the protective cover (7) are open, the top end of the protective cover (7) is communicated with the through hole (311), and the bottom end of the protective cover (7) covers the cap (4) and the welding area (5) together after the lower pressing head (33) is pressed to the surface of the battery top cover (1).

6. A pole clamp welding press according to claim 5, wherein The support frame (8) and the lifting driving element (9) on the support frame (8) are further included, the lifting end of the lifting driving element (9) is connected with the lower pressing part (31), so that the lower pressing part (31) is driven to perform the lifting action relative to the support table top (2).

7. A pole clamp welding press according to claim 6, wherein The lower pressing part (31) is provided with two through holes (311), the two through holes (311) correspond to the two pole post mounting holes (11) on the battery top cover (1) one by one, each through hole (311) is provided with an annular rotating disc (32), a lower pressing head (33) and a protective cover (7) correspondingly, and the rack (34), the telescopic driving element (6) and the lifting driving element (9) are all two.

8. A pole clamp welding press according to claim 1 wherein, The fixing frame (10) is further included, the support table top (2) is arranged on the fixing frame (10), the fixing frame (10) is provided with a guide rail (13) below, the bottom of the fixing frame (10) is provided with a sliding block (14) in sliding fit with the guide rail (13), so that the support table top (2) can be adjusted in displacement along the extension direction of the guide rail (13).

9. A pole clamp welding press according to claim 8, wherein The support table top (2) is provided with a mounting plate (21), the battery top cover (1) is placed on the surface of the mounting plate (21), the surface of the mounting plate (21) is provided with a boss (22) for supporting the battery top cover (1), and a plurality of positioning blocks (23) are arranged on the mounting plate (21) along the edge of the battery top cover (1), and the positioning blocks (23) abut against the side surface of the battery top cover (1) to position the battery top cover (1).

10. A pole clamp welding press according to claim 4, wherein The lower pressing part (31) is provided with a mounting block (15), the mounting block (15) is provided with a sliding groove (151), the rack (34) is provided with a sliding part (341) and is in sliding fit with the sliding groove (151), and the telescopic end of the telescopic driving element (6) is connected with one end of the rack (34), so that the rack (34) is driven to reciprocate along the sliding groove (151).

Images