Cylindrical battery current collector welding clamp and equipment

Abstract

The invention provides a welding clamp and equipment for a cylindrical battery current collector. The welding clamp comprises a reference pressing plate, a first clamping plate and a second clamping plate, the lock sleeve is rotationally mounted on the reference pressing plate, an assembly hole is formed in the lock sleeve, a cylindrical battery can extend into the assembly hole, and a first pressing block is adjustably assembled on the lock sleeve; the floating plate is located on the longitudinal lower side of the reference pressing plate and can be close to or away from the reference pressing plate in the longitudinal direction, and a second pressing block is adjustably assembled on the floating plate; when the cylindrical battery is located in the assembling hole, the first pressing block can move outwards in the radial direction of the assembling hole so as to drive the flanging to be attached to the shell, and the second pressing block can move inwards in the radial direction of the assembling hole so as to clamp the cylindrical battery; and the cylindrical battery is coaxial with the assembly hole. According to the invention, the gap between the flanging structure and the shell can be effectively eliminated, and the possibility of pseudo soldering is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of batteries, and in particular to a cylindrical battery current collector welding fixture and equipment. Background Art

[0002] like Figure 1 The figure shows a cylindrical battery a of a certain model, comprising a shell a1, a current collector a2, and a core a3. A flange structure a21 is provided around the periphery of the current collector a2. The current collector a2 and core a3 are embedded in the shell a1, and the tabs of the core a3 are connected to the current collector a2. The flange structure a21 is attached to the inner wall of the shell a1 and then laser welded to connect the current collector a2 to the shell a1. For ease of assembly, a certain gap is allowed between the flange structure a21 and the inner wall of the shell a1. However, the presence of this gap makes it easy for a cold weld to occur between the flange structure a21 and the inner wall of the shell a1 during the subsequent laser welding process. Therefore, how to eliminate the gap between the flange structure a21 and the inner wall of the shell a1 during the welding process is an urgent problem to be solved. Summary of the Invention

[0003] In view of the shortcomings of the prior art, the first object of the present invention is to provide a cylindrical battery current collector welding fixture, which can effectively eliminate the gap between the flange structure and the shell and reduce the possibility of cold welding.

[0004] The second object of the present invention is to provide a cylindrical battery current collector welding device, which can ensure the welding quality and processing efficiency of the cylindrical battery.

[0005] The embodiments of the present invention are achieved through the following technical solutions:

[0006] A cylindrical battery collector welding fixture comprises: a reference pressure plate; a locking sleeve rotatably mounted on the reference pressure plate, the locking sleeve being provided with an assembly hole into which a cylindrical battery can extend, the locking sleeve being adjustably provided with a first pressure block; a floating plate located on the longitudinal lower side of the reference pressure plate and capable of longitudinally approaching or moving away from the reference pressure plate, the floating plate being adjustably provided with a second pressure block; when the cylindrical battery is in the assembly hole, the first pressure block is capable of moving radially outward along the assembly hole to drive the flange to adhere to the shell, and the second pressure block is capable of moving radially inward along the assembly hole to clamp the cylindrical battery; the cylindrical battery is coaxial with the assembly hole. Here, the cylindrical battery is clamped in a stable spatial position by the second pressure block, while the first pressure block abuts and drives the flange structure to adhere to the inner wall of the shell during the radial outward movement of the cylindrical battery, thereby eliminating the gap between the flange structure and the inner wall of the shell, thereby facilitating laser welding of the shell and the flange structure and reducing the possibility of a cold weld.

[0007] A cylindrical battery current collector welding device includes a frame with a turntable rotatably mounted thereon. The turntable is equipped with a cup for supporting cylindrical batteries. The frame is also equipped with a laser welding mechanism and the aforementioned cylindrical battery current collector welding fixture. The laser welding mechanism projects a laser beam for welding. The cylindrical batteries in the cup are moved by the turntable, and the cylindrical battery current collector welding fixture is positioned in the movement path of the cylindrical batteries in the cup. This cylindrical battery current collector welding device can efficiently and high-quality weld the cylindrical battery casing and current collector, thereby ensuring production efficiency and product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0009] Figure 1 Schematic diagram of the three-dimensional structure of a cylindrical battery in an embodiment of the present invention;

[0010] Figure 2 A schematic diagram of the three-dimensional structure of a cylindrical battery current collector welding device provided in an embodiment of the present invention;

[0011] Figure 3 A schematic diagram of the three-dimensional structure of a cylindrical battery current collector welding fixture provided by an embodiment of the present invention;

[0012] Figure 4 for Figure 3 A schematic diagram of the structure after the first support plate is removed;

[0013] Figure 5 for Figure 4 a top view of the structure shown;

[0014] Figure 6 for Figure 5 Cross-sectional view of section AA;

[0015] Figure 7 for Figure 6 A partial enlarged schematic diagram of the structure at point B in the middle;

[0016] Figure 8 for Figure 6 A partial enlarged schematic diagram of the structure at position C in the middle;

[0017] Figure 9 for Figure 6 The schematic diagram of the structure after the cylindrical battery is removed;

[0018] Figure 10 A schematic diagram of an exploded structure of an assembly structure of a floating plate, a locking sleeve, and a second unlocking ring provided in an embodiment of the present invention;

[0019] Figure 11 A schematic diagram of the exploded structure of the welding fixture (after removing the first support plate) provided in an embodiment of the present invention;

[0020] Figure 12 A schematic diagram of the three-dimensional structure of a floating plate provided in an embodiment of the present invention;

[0021] Figure 13 A schematic diagram of an exploded structure of an assembly structure of a first pressing block, a locking sleeve, a pressing plate, and an upper cover plate provided in an embodiment of the present invention;

[0022] Figure 14 A schematic diagram of the three-dimensional structure of the upper cover plate provided in an embodiment of the present invention;

[0023] Figure 15 A schematic diagram of the first three-dimensional structure of the cylindrical battery current collector welding fixture provided by an embodiment of the present invention after the reference pressure plate is removed (the upper cover plate and the locking sleeve are separated);

[0024] Figure 16 A schematic diagram of a second three-dimensional structure of the cylindrical battery current collector welding fixture provided by an embodiment of the present invention after the reference pressure plate is removed;

[0025] Figure 17 A top view of the cylindrical battery current collector welding fixture provided by an embodiment of the present invention in an unlocked state.

[0026] Icons: 1. Frame; 2. Laser welding mechanism; 3. Welding fixture; 30. Limit pin; 301. First reset member; 302. Second reset member; 31. First support plate; 32. Lock sleeve; 321. Inner sleeve; 3210. Assembly hole; 3211. First locking surface; 3212. First upper assembly groove; 3213. Second upper assembly groove; 3214. Upper step; 322. Outer sleeve; 3221. Pulley; 3222. Step belt; 33, first pressure block; 331, guide portion; 332, pressure plate; 3320, locking surface; 3321, welding hole; 333, limit plate; 334, second unlocking surface; 34, second pressure block; 341, main body; 342, connecting portion; 343, guide block; 3410, second locking surface; 35, floating plate; 351, first guide shaft; 3511, first limit block; 3512, first spring; 352, avoidance hole ; 3521, second lower assembly groove; 353, first lower assembly groove; 354, lower cover; 3541, baffle; 36, upper cover; 360, first through hole; 361, limiting protrusion; 37, pressing plate; 38, reference pressing plate; 381, second through hole; 382, ​​angular contact bearing; 383, lower fixing ring; 3831, lower step; 384, upper fixing ring; 385, second guide shaft; 3851, guide section; 3852, drive Moving section; 38521, second limit block; 38522, second spring; 386, first driving member; 391, first unlocking part; 3911, first unlocking ring; 3912, first unlocking member; 39121, first unlocking surface; 392, second unlocking part; 3921, second unlocking ring; 4, turntable; 5, support cup; X, longitudinal direction; a, cylindrical battery; a1, shell; a2, current collector; a21, flanging structure; a3, winding core. DETAILED DESCRIPTION

[0027] For better understanding and implementation, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0028] In the description of the present invention, it should be noted that the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limiting the present invention.

[0029] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used in the specification of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0030] Please refer to Figures 3 to 17 A cylindrical battery current collector welding fixture includes a first support plate 31, a reference pressure plate 38, a locking sleeve 32, and a floating plate 35. The reference pressure plate 38 is L-shaped. The short side of the reference pressure plate 38 is slidably assembled on the first support plate 31 along the longitudinal X direction through a slide rail slider assembly and is driven by a linear module or cylinder provided on the first support plate 31 to achieve its longitudinal height adjustment; the long side of the reference pressure plate 38 is parallel to the horizontal plane, and the locking sleeve 32 is rotatably mounted on the long side of the reference pressure plate 38 through an angular contact bearing 382. The locking sleeve 32 is provided with an assembly hole 3210. Cylindrical battery a It can be extended into the assembly hole 3210, and the locking sleeve 32 is adjustably equipped with a first pressure block 33; the floating plate 35 is located on the longitudinal lower side of the reference pressure plate 38, and can be moved closer to or away from the reference pressure plate 38 in the longitudinal direction, and the floating plate 35 is adjustably equipped with a second pressure block 34; when the cylindrical battery a is in the assembly hole 3210, the first pressure block 33 can move radially outward along the assembly hole 3210 to drive the flange to fit to the shell a1, and the second pressure block 34 can move radially inward along the assembly hole 3210 to clamp the cylindrical battery a; the cylindrical battery a is coaxial with the assembly hole 3210. In this embodiment, the cylindrical battery a is coaxially assembled into the assembly hole 3210, and the first pressure block 33 and the second pressure block 34 are both radially along the assembly hole 3210, that is, the first pressure block 33 and the second pressure block 34 move along the radial direction of the cylindrical battery a, thereby ensuring the stability and higher position accuracy of the cylindrical battery a in the assembly hole 3210 during the clamping process, which is beneficial to improving the welding quality; when in use, the cylindrical battery a is clamped in a stable spatial position by the second pressure block 34, while the first pressure block 33 abuts and drives the flange structure a21 to fit to the inner wall of the shell a1 during the radial outward movement of the cylindrical battery a, so as to eliminate the gap between the flange structure a21 and the inner wall of the shell a1, thereby facilitating the laser welding operation of the shell a1 and the flange structure, reducing the possibility of producing cold welds.

[0031] It is understandable that if Figure 4 As shown, at least a portion of the flange structure a21 clamped by the first pressing block 33 can be exposed toward the upper space in the longitudinal direction X through the assembly hole 3210 , and the exposed portion of the flange structure a21 can meet the welding strength requirements.

[0032] like Figures 6 to 8As shown, the welding fixture 3 also includes a first reset member 301 and a second reset member 302. The first reset member 301 acts on the first pressure block 33 so that the first pressure block 33 has a tendency to move radially outward along the assembly hole 3210; the second reset member 302 acts on the second pressure block 34 so that the second pressure block 34 has a tendency to move radially outward along the assembly hole 3210. Preferably, the first reset member 301 and the second reset member 302 are both springs. Here, the first reset member 301 and the second reset member 302 are used to realize the automatic reset of the first pressure block 33 and the second pressure block 34 respectively. Among them, the first reset member 301 enables the first pressure block 33 to be in a locked state to realize the self-locking of the first pressure block 33 to the flange structure a21; the second reset member 302 acts on the second pressure block 34 so that the second pressure block 34 can quickly unlock the cylindrical battery a, that is, the shell a1.

[0033] like Figure 6 and Figure 8 As shown, the locking sleeve 32 is provided with a first locking surface 3211, and the second pressing block 34 is provided with a second locking surface 3410. When the floating plate 35 moves longitudinally toward the reference pressing plate 38, the first locking surface 3211 can act on the second locking surface 3410, causing the second pressing block 34 to move radially inward along the assembly hole 3210 to achieve a locked state. In this embodiment, the first locking surface 3211 is provided on the inner wall of the assembly hole 3210, and the structure provided with the second locking surface 3410 on the second pressing block 34 is embedded in the assembly hole 3210. Figure 8 and Figure 9 As shown, in this embodiment, preferably, the first locking surface 3211 is a conical surface, and correspondingly, the second locking surface 3410 is a conical surface that matches the first locking surface 3211. In this embodiment, the second pressing block 34 is embedded in the assembly hole 3210 from bottom to top. That is, when the second pressing block 34 moves upward along the longitudinal direction X, the first locking surface 3211 acts on the second locking surface 3410 to cause the second pressing block 34 to move radially inward along the assembly hole 3210, thereby clamping and fixing the cylindrical battery a, that is, the shell a1.

[0034] like Figure 10As shown, the locking sleeve 32 is equipped with a first guide shaft 351 extending in the longitudinal direction X. The first guide shaft 351 passes through the floating plate 35. A first stopper 3511 is disposed at the end of the first guide shaft 351 away from the locking sleeve 32. A first spring 3512 is disposed on the outer sleeve of the first guide shaft 351 and positioned between the floating plate 35 and the first stopper 3511. The first spring 3512 acts on the floating plate 35, causing it to move longitudinally toward the reference pressure plate 38. In this embodiment, the second pressure block 34 is mounted on the floating plate 35, and the two move synchronously in the longitudinal direction. Therefore, as the first spring 3512 acts on the floating plate 35 to move longitudinally upward toward the reference pressure plate 38, the second pressure block 34 simultaneously moves longitudinally upward, thereby achieving self-locking of the cylindrical battery a through the interaction of the first locking surface 3211 and the second locking surface 3410.

[0035] In this embodiment, optionally, the number of each of the first pressing blocks 33 and the second pressing blocks 34 is four, and the four first pressing blocks 33 and the four second pressing blocks 34 are evenly distributed along the circumference of the assembly hole 3210 .

[0036] Optionally, the first guide shaft 351 is a threaded shaft that is threadedly connected to the locking sleeve 32. In some embodiments, the first guide shaft 351 is slidably connected to the floating plate 35 via a linear bearing. In other embodiments, the floating plate 35 has a hole for accommodating the first guide shaft 351, with the inner diameter of the hole slightly larger than the diameter of the area of ​​the first guide shaft 351 that fits within the hole. This facilitates relative movement between the floating plate 35 and the first guide shaft 351.

[0037] like Figure 11 and Figure 12As shown, the floating plate 35 is provided with an avoidance hole 352, which is coaxial with the assembly hole 3210 and the two are connected. The cylindrical battery a passes through the avoidance hole 352 and enters the assembly hole 3210, and the four second pressing blocks 34 surround the cylindrical battery a. Furthermore, the lower side surface of the floating plate 35 is provided with a first lower assembly groove 353, and the groove wall of the avoidance hole 352 is provided with a second lower assembly groove 3521, which is connected to the first lower assembly groove 353. The lower surface of the floating plate 35 is provided with a lower cover plate 354, and the lower cover plate 354 is provided with a baffle 3541; the second pressing block 34 includes a main body 341 and a guide block 343, which are connected by a connecting portion 342. The guide block 343 is slidably embedded in the first lower assembly groove 353, and the main body 341 is on the upper side of the floating plate 35. Above the surface, the second lower assembly groove 3521 is used to accommodate the connecting portion 342, the lower cover plate 354 is used to block the first lower assembly groove 353, the baffle 3541 is closer to the center of the avoidance hole 352 than the guide block 343, and the second reset member 302, that is, the spring is pressed between the guide block 343 and the baffle 3541, and is used to act on the second pressure block 34 during the downward movement of the floating plate 35, that is, the second pressure block 34 along the longitudinal direction X, so that it moves radially outward along the assembly hole 3210 in the first lower assembly groove 353, so as to unlock the cylindrical battery a.

[0038] In this embodiment, there are four first lower assembly grooves 353 , which are arranged in one-to-one correspondence with the four second pressing blocks 34 , and are used to limit the movement path of the guide block 343 , ie, the second pressing block 34 , in the radial direction of the assembly hole 3210 .

[0039] like Figures 13 to 15As shown, the top of the locking sleeve 32 is provided with a first upper assembly groove 3212, and the number of the first upper assembly grooves 3212 here is four, which correspond to the four first pressure blocks 33 one by one; the first upper assembly groove 3212 is extended along the radial direction of the assembly hole 3210; the first pressure block 33 includes a guide portion 331, which is slidably embedded in the first upper assembly groove 3212, and the end of the guide portion 331 facing the center of the assembly hole 3210 is provided with a clamping plate 332, which extends into the assembly hole 3210 along the axial direction of the assembly hole 3210, and the other end of the guide portion 331 is provided with a limiting plate 333, and the top of the locking sleeve 32 is provided with an upper cover plate 36, and the upper cover plate 36 is provided with a limiting protrusion 361 facing the side of the locking sleeve 32, and the first return member 301, that is, the spring, is provided between the limiting protrusion 361 and the limiting plate 333. In this embodiment, the limiting protrusion 361 is closer to the center of the assembly hole 3210 than the limiting plate 333. It should be noted that in order to facilitate welding, a first through hole 360 ​​is provided on the upper cover plate 36 that is coaxial with and connected to the assembly hole 3210. With this arrangement, the upper cover plate 36 can block the first upper assembly groove 3212 in the longitudinal direction to prevent the first pressure block 33 from escaping from the locking sleeve 32. The first reset member 301 acts on the limiting plate 333 so that the pressing plate 332 self-locks the flange structure a21 to the inner wall of the shell a1. It should be noted that the cylindrical battery a assembled in the assembly hole 3210, the flange structure a21 of the current collector a2 and the shell a1 of the battery are located between the inner wall of the assembly hole 3210 and the pressing plate 332.

[0040] Optionally, a locking surface 3320 is configured on one side of the pressing plate 332 facing the inner wall of the assembly hole 3210 , and the locking surface 3320 is an arc surface adapted to the outer shape of the flanging structure a21 .

[0041] Furthermore, in order to facilitate welding, a welding hole 3321 is provided through the pressing plate 332 , and the welding hole 3321 is used to expose the welding area of ​​the flanging structure a21 .

[0042] Furthermore, in order to prevent the current collector a2 from shifting during the locking process of the flange structure a21, a pressing plate 37 is mounted on the locking sleeve 32. When the cylindrical battery a is assembled in the assembly hole 3210, the pressing plate 37 is attached to the current collector a2. Figure 7 As shown, in the longitudinal direction X, the lower side surface of the pressing plate 37 is lower than the lower end surface of the pressing plate 332 to avoid interference.

[0043] like Figure 13 As shown, the top of the locking sleeve 32 is further provided with a second upper assembly groove 3213 , which is staggered with the first upper assembly groove 3212 , and the pressing plate 37 is provided with an extension arm, and the extension wall is installed in the second upper assembly groove 3213 by screws or bolts.

[0044] like Figure 7 、 Figure 10 and Figure 11 As shown, a second through hole 381 is provided on the reference pressure plate 38, and the locking sleeve 32 includes an inner sleeve 321 and an outer sleeve 322. The outer sleeve 322 is sleeved on the outside of the inner sleeve 321, and the first pressure block 33 is assembled on the top end of the outer sleeve 322. The outer sleeve 322 and the inner sleeve 321 are fixedly connected by bolts. An upper step 3214 is provided on the outer wall of the inner sleeve, and the upper step 3214 cooperates with the upper end face of the outer sleeve to assemble and fix the inner ring of the angular contact bearing 382; a lower fixing ring 383 is assembled in the second through hole 381, and an upper fixing ring 384 is provided on the upper side surface of the lower fixing ring 383 in the longitudinal direction X, and a lower step 3831 is provided on the lower fixing ring 383, and the lower step 3831 cooperates with the upper fixing ring 384 to assemble and fix the outer ring of the angular contact bearing 382.

[0045] In this embodiment, the first guide shaft 351 is assembled to the outer sleeve 322 .

[0046] In this embodiment, the locking sleeve 32, specifically the outer sleeve 322, is equipped with a pulley 3221. The synchronous belt 3222 cooperates with the pulley 3221 to drive the locking sleeve 32 and the components assembled on the locking sleeve 32 to rotate, thereby realizing the self-rotation of the cylindrical battery a, so as to improve the welding efficiency.

[0047] In this embodiment, the reference pressure plate 38 is provided with a first unlocking portion 391. The first unlocking portion 391 can act on the first pressure block 33 to cause the first pressure block 33 to move radially inwardly of the assembly hole 3210. Furthermore, the reference pressure plate 38 is provided with a second unlocking portion 392. The second unlocking portion 392 can act on the floating plate 35 to cause the floating plate 35 to move longitudinally away from the reference pressure plate 38, thereby allowing the second locking surface 3410 to disengage from the first locking surface 3211. Preferably, the first unlocking portion 391 and the second unlocking portion 392 are linked. This linkage can reduce the number of drive mechanisms, thereby lowering production costs.

[0048] like Figure 11 、 Figure 15 and Figure 16As shown, the reference pressure plate 38 is located between the first unlocking portion 391 and the second unlocking portion 392; the first unlocking portion 391 includes a first unlocking ring 3911, on which is mounted a first unlocking member 3912 corresponding to the first pressure block 33, a first unlocking surface 39121 is arranged on the first unlocking member 3912, and a second unlocking surface 334 is arranged on the first pressure block 33. When the first unlocking ring 3911 moves in the longitudinal direction X toward the direction close to the reference pressure plate 38, the first unlocking surface 39121 can act on the second unlocking surface 334, so that the first pressure block 33 moves radially inward along the assembly hole 3210. In this embodiment, preferably, the first unlocking member 3912 is a roller, which is rotatably mounted with the first unlocking ring 3911, and the second unlocking surface 334 is an inclined plane. When unlocking, as shown in FIG. Figure 17 As shown, the locking sleeve 32 rotates to the first pressure block 33 corresponding to the first unlocking member 3912, and the first unlocking ring 3911 moves downward in the longitudinal direction, that is, moves in the direction close to the reference pressure plate 38. The first unlocking member 3912, that is, the roller, acts on the second unlocking surface 334, that is, the inclined plane, to drive the first pressure block 33 to move radially inward along the assembly hole 3210 to achieve unlocking of the flanging structure a21.

[0049] In another embodiment, the first unlocking member 3912 is a protruding structure integrated on the first unlocking ring 3911 , and the first unlocking surface 39121 is an inclined plane adapted to the second unlocking surface 334 .

[0050] like Figure 10 and Figure 11 As shown, the second unlocking portion 392 includes a second unlocking ring 3921. When the second unlocking ring 3921 moves in the longitudinal direction X in a direction away from the reference pressure plate 38, the second unlocking ring 3921 can drive the floating plate 35 to move in the longitudinal direction X in a direction away from the reference pressure plate 38. That is, during the process of the second unlocking ring 3921 moving downward in the longitudinal direction, the second unlocking ring 3921 drives the floating plate 35 to move downward in the longitudinal direction. The floating plate 35 slides relative to the first guide shaft 351 and moves downward in the longitudinal direction relative to the locking sleeve 32. During this process, the first spring 3512 is compressed, and the second pressure block 34 moves downward in the longitudinal direction with the floating plate 35. The second return member 302 acts on the second pressure block 34 to move radially outward along the assembly hole 3210, thereby unlocking the cylindrical battery a.

[0051] like Figure 11 、 Figure 15 and Figure 16As shown, the reference pressure plate 38 is equipped with a second guide shaft 385, which extends in the longitudinal direction X and penetrates the reference pressure plate 38 and is slidably connected thereto. A first unlocking ring 3911 and a second unlocking ring 3921 are both mounted on the second guide shaft 385. A first driving member 386 is mounted on the reference pressure plate 38, which is used to drive the second guide shaft 385 in the longitudinal direction. The second guide shaft 385 is slidably connected to the reference pressure plate 38 via a linear bearing. The first unlocking ring 3911 and the second unlocking ring 3921 are linked by the second guide shaft 385, thereby achieving linkage between the first unlocking portion 391 and the second unlocking portion 392. Optionally, the first driving member 386 is a pneumatic cylinder. Its cylinder barrel is mounted on the reference pressure plate 38, and the free end of its piston rod is connected to the first unlocking ring 3911.

[0052] Furthermore, the second guide shaft 385 includes a guide section 3851 and a driving section 3852 that are interconnected. The diameter of the guide section 3851 is larger than the diameter of the driving section 3852. The guide section 3851 is slidably connected to the reference pressure plate 38. A driving hole is provided through the second unlocking ring 3921. The driving section 3852 is inserted into the driving hole. The inner diameter of the driving hole is smaller than the diameter of the guide section 3851. A second limit block 38521 is provided at the end of the driving section 3852 away from the guide section 3851. A second spring 38522 is provided on the outer sleeve of the driving section 3852. The second spring 38522 is located between the second limit block 38521 and the second unlocking ring 3921. When the cylindrical battery current collector welding fixture is in a locked state, the second spring 38522 acts on the second unlocking ring 3921 to cause the second unlocking ring 3921 to detach from the floating plate 35. With this arrangement, during the welding process, when the floating plate 35 rotates following the locking sleeve 32 , the second unlocking ring 3921 and the floating plate 35 do not interfere with each other.

[0053] like Figure 11 As shown, the second unlocking ring 3921 and the first unlocking ring 3911 are both equipped with limit pins 30, and the limit pins 30 cooperate with the reference pressure plate 38 to correspondingly limit the extreme movement positions of the second unlocking ring 3921 and the first unlocking ring 3911.

[0054] like Figure 2As shown, this embodiment also provides a cylindrical battery collector welding device, including a frame 1, a turntable 4 is rotatably mounted on the frame 1, and a cup 5 for supporting the cylindrical battery a is mounted on the turntable 4. The frame 1 is also provided with a laser welding mechanism 2 and a cylindrical battery collector welding fixture as described above. The laser welding mechanism 2 is used to project a laser beam for welding. The cylindrical battery a in the cup 5 can move under the action of the turntable 4, and the cylindrical battery collector welding fixture is on the movement path of the cylindrical battery a in the cup 5. During use, when the cylindrical battery a moves to the bottom of the cylindrical battery collector welding fixture, the reference pressure plate 38 moves downward along the longitudinal direction X so that the cylindrical battery a is embedded in the assembly hole 3210. Then, the cylindrical battery a is clamped and fixed by the first pressure block 33 and the second pressure block 34 to carry out the welding work; after the welding is completed, the first pressure block 33 and the second pressure block 34 are each unlocked, and the reference pressure plate 38 moves upward along the longitudinal direction, and the cylindrical battery a is separated from the assembly hole 3210. After the turntable 4 rotates, the welded cylindrical battery a can be unloaded by the mechanical gripper. Specifically, the first support plate 31 is installed on the frame 1. The cylindrical battery collector welding equipment can efficiently and high-quality complete the welding work of the cylindrical battery a shell a1 and the collector a2.

[0055] The technical means disclosed in the solutions of the present invention are not limited to those disclosed in the above-mentioned embodiments, but also include technical solutions composed of any combination of the above-mentioned technical features. It should be noted that those skilled in the art may make various improvements and modifications without departing from the principles of the present invention, and such improvements and modifications are also considered to be within the scope of protection of the present invention.

Claims

1. A cylindrical battery current collector welding fixture, characterized in that: include: Reference plate; A locking sleeve is rotatably mounted on the reference pressure plate, the locking sleeve is provided with an assembly hole into which the cylindrical battery can extend, and the locking sleeve is adjustably equipped with a first pressure block; a floating plate located at the longitudinal lower side of the reference pressing plate and capable of approaching or moving away from the reference pressing plate in the longitudinal direction, wherein the floating plate is adjustably equipped with a second pressing block; When the cylindrical battery is in the assembly hole, the first pressing block can move radially outward along the assembly hole to drive the flange to fit onto the shell, and the second pressing block can move radially inward along the assembly hole to clamp the cylindrical battery; The cylindrical battery is coaxial with the assembly hole.

2. The cylindrical battery current collector welding fixture according to claim 1, characterized in that: The welding fixture further includes a first resetting member and a second resetting member, wherein the first resetting member acts on the first pressing block so that the first pressing block has a tendency to move radially outward along the assembly hole; The second restoring member acts on the second pressing block so that the second pressing block has a tendency to move outward in the radial direction of the assembly hole.

3. The cylindrical battery current collector welding fixture according to claim 1, characterized in that: The locking sleeve is provided with a first locking surface, and the second pressing block is provided with a second locking surface; When the floating plate moves longitudinally toward the reference pressure plate, the first locking surface can act on the second locking surface to cause the second pressure block to move radially inwardly of the assembly hole to reach a locked state.

4. The cylindrical battery current collector welding fixture according to claim 1, characterized in that: The locking sleeve is provided with a first guide shaft extending in the longitudinal direction, the first guide shaft passes through the floating plate, a first limit block is provided at one end of the first guide shaft away from the locking sleeve, a first spring is provided on the outer sleeve of the first guide shaft, and the first spring is located between the floating plate and the first limit block; The first spring acts on the floating plate to cause the floating plate to move in a longitudinal direction toward the reference pressure plate.

5. The cylindrical battery current collector welding fixture according to claim 1, characterized in that: The reference pressing plate is provided with a first unlocking portion, which can act on the first pressing block to enable the first pressing block to move inwardly in the radial direction of the assembly hole.

6. The cylindrical battery current collector welding fixture according to claim 3, characterized in that: The reference pressure plate is provided with a second unlocking portion, which can act on the floating plate to move the floating plate in a longitudinal direction away from the reference pressure plate, thereby allowing the second locking surface to be separated from the first locking surface.

7. The cylindrical battery current collector welding fixture according to claim 6, characterized in that: The reference pressure plate is further provided with a first unlocking portion, which can act on the first pressure block to make the first pressure block move inwardly along the radial direction of the assembly hole; The first unlocking portion and the second unlocking portion are linked together.

8. The cylindrical battery current collector welding fixture according to claim 7, characterized in that: The reference pressure plate is located between the first unlocking portion and the second unlocking portion; The first unlocking portion includes a first unlocking ring, on which is assembled a first unlocking piece corresponding to the first pressure block, a first unlocking surface is arranged on the first unlocking piece, and a second unlocking surface is arranged on the first pressure block. When the first unlocking ring moves longitudinally toward the direction close to the reference pressure plate, the first unlocking surface can act on the second unlocking surface to make the first pressure block move radially inward along the assembly hole.

9. The cylindrical battery current collector welding fixture according to claim 8, characterized in that: The second unlocking portion includes a second unlocking ring. When the second unlocking ring moves longitudinally away from the reference pressure plate, the second unlocking ring can drive the floating plate to move longitudinally away from the reference pressure plate.

10. The cylindrical battery current collector welding fixture according to claim 9, characterized in that: The reference pressure plate is provided with a second guide shaft, the second guide shaft is longitudinally extended, the second guide shaft passes through the reference pressure plate and is slidably connected to the reference pressure plate; The first unlocking ring and the second unlocking ring are both assembled on the second guide shaft. The reference pressure plate is assembled with a first driving member, and the first driving member is used to drive the second guide shaft to move longitudinally.

11. The cylindrical battery current collector welding fixture according to claim 10, characterized in that: The second guide shaft includes a guide section and a driving section connected to each other, the diameter of the guide section is larger than the diameter of the driving section, the guide section is slidably connected to the reference pressure plate, the second unlocking ring is provided with a driving hole, the driving section is inserted into the driving hole, and the inner diameter of the driving hole is smaller than the diameter of the guide section; The end of the driving section away from the guiding section is provided with a second limiting block, and the outer sleeve of the driving section is provided with a second spring, and the second spring is located between the second limiting block and the second unlocking ring; When the cylindrical battery current collector welding fixture is in a locked state, the second spring acts on the second unlocking ring to separate the second unlocking ring from the floating plate.

12. The cylindrical battery current collector welding fixture according to claim 2, characterized in that: The floating plate is provided with an avoidance hole, the avoidance hole is coaxial with the assembly hole, and the two are connected; The lower side of the floating plate is provided with a first lower assembly groove, the groove wall of the avoidance hole is provided with a second lower assembly groove, the second lower assembly groove is connected to the first lower assembly groove, the lower surface of the floating plate is provided with a lower cover plate, and the lower cover plate is provided with a baffle; The second pressure block includes a main body and a guide block, which are connected by a connecting portion. The guide block is slidably embedded in the first lower assembly groove. The main body is located above the upper side of the floating plate. The second lower assembly groove is used to accommodate the connecting portion. The lower cover plate is used to block the first lower assembly groove. The baffle is closer to the center of the avoidance hole than the guide block. The second reset member is arranged between the guide block and the baffle.

13. The cylindrical battery current collector welding fixture according to claim 2, characterized in that: The top end of the lock sleeve is provided with a first upper assembly groove, and the first upper assembly groove is extended along the radial direction of the assembly hole; The first pressing block includes a guide portion, which is slidably embedded in the first upper assembly groove. A pressing plate is provided at one end of the guide portion facing the center of the assembly hole, and the pressing plate extends into the assembly hole along the axial direction of the assembly hole. A limiting plate is provided at the other end of the guide portion. An upper cover plate is provided at the top end of the locking sleeve, and a limiting protrusion is provided on the upper cover plate facing the side of the locking sleeve. The first reset member is provided between the limiting protrusion and the limiting plate. The limiting protrusion is closer to the center position of the assembly hole than the limiting plate.

14. The cylindrical battery current collector welding fixture according to claim 13, characterized in that: A locking surface is provided on one side of the pressing plate facing the inner wall of the assembly hole, and the shape of the locking surface is adapted to the shape of the flanging structure.

15. The cylindrical battery current collector welding fixture according to claim 13, characterized in that: The pressing plate is provided with a welding hole extending therethrough, and the welding hole is used to expose the flanging structure.

16. The cylindrical battery current collector welding fixture according to claim 13, characterized in that: The locking sleeve is equipped with a pressing plate, and when the cylindrical battery is assembled in the assembly hole, the pressing plate is attached to the current collector; In the longitudinal direction, the lower side surface of the pressing plate is lower than the lower end surface of the pressure plate.

17. A cylindrical battery current collector welding device, characterized in that: It includes a frame on which a turntable is rotatably mounted, and the turntable is equipped with a cup for holding cylindrical batteries. The frame is also provided with a laser welding mechanism and a cylindrical battery collector welding fixture as described in any one of claims 1 to 16. The laser welding mechanism is used to project a laser beam for welding. The cylindrical battery in the cup can move under the action of the turntable, and the cylindrical battery collector welding fixture is located on the movement path of the cylindrical battery in the cup.

Images