Automatic tab positioning mechanism for top sealing of soft package lithium battery

Abstract

The invention belongs to the technical field of lithium battery tab positioning, and particularly relates to an automatic tab positioning mechanism for soft package lithium battery top sealing, which comprises a worktable, a top sealing table arranged on the worktable, a support column fixedly mounted on the worktable, a wheel turntable rotatably mounted at the top end of the support column, and a plurality of brackets fixedly mounted on the wheel turntable, the support is provided with a groove used for containing the soft package lithium battery, clamping plates used for clamping the soft package lithium battery are elastically installed on the support, a pneumatic extrusion table used for positioning the soft package lithium battery is arranged below the support, a rotating rod is rotationally installed on the workbench, a delivery disc is fixedly installed on the rotating rod, and a feeding disc is installed on the rotating rod in a sliding mode. The feeding tray is provided with the material storage box used for containing the soft package lithium battery, the soft package lithium battery is subjected to double positioning, the deviation problem in the transferring process is avoided, meanwhile, it is guaranteed that an aluminum plastic film heat sealing area and a tab are accurately aligned, and the packaging sealing performance and the insulating performance are further improved.

Description

Technical Field

[0001] This invention belongs to the field of lithium battery tab positioning technology, specifically an automatic tab positioning mechanism for the top seal of a soft-pack lithium battery. Background Technology

[0002] Top sealing of pouch lithium batteries refers to the process of sealing the top of the pouch battery. Its main function is to encapsulate the battery tabs (positive and negative leads) with an aluminum-plastic film, forming a sealed structure to prevent electrolyte leakage and external contamination. This process typically involves heat sealing (heating and pressurizing) to fuse the inner PP material of the aluminum-plastic film, while ensuring a tight bond and insulation between the tabs and the encapsulation area. Top sealing must balance sealing performance, insulation, and mechanical strength, making it a critical step affecting battery safety, lifespan, and performance. Its quality directly impacts the battery's short-circuit protection, leakage prevention, and long-term reliability.

[0003] When encapsulating lithium batteries, the tab material (metal foil) is thin and easily deformed, and may shift during the transfer encapsulation process. Traditional mechanical positioning or simple vision systems are unable to track dynamic changes in real time, leading to the accumulation of errors, which in turn reduces the sealing performance of the encapsulation, increases the risk of electrolyte leakage or short circuit, and at the same time, misalignment between the tab and the heat-sealing area of ​​the aluminum-plastic film will also reduce the insulation performance. These problems will directly affect the safety and consistency of the battery.

[0004] Therefore, the present invention provides an automatic positioning mechanism for the tabs of a soft-pack lithium battery top seal. Summary of the Invention

[0005] In order to overcome the shortcomings of the prior art, at least one technical problem raised in the background art is solved.

[0006] The technical solution adopted by the present invention to solve its technical problem is: the present invention provides an automatic positioning mechanism for the tabs of a soft-pack lithium battery top seal, including a worktable, on which a top sealing platform is provided;

[0007] A support column is fixedly installed on the workbench. A turntable is rotatably installed on the top of the support column. Multiple brackets are fixedly installed on the turntable. The brackets are provided with grooves for placing soft-pack lithium batteries. Clamping plates for holding soft-pack lithium batteries are elastically installed on the brackets. A pneumatic extrusion table for positioning soft-pack lithium batteries is provided below the brackets.

[0008] A rotating rod is rotatably mounted on the workbench, a delivery tray is fixedly mounted on the rotating rod, a feeding tray is slidably mounted on the rotating rod, and a storage box for placing soft-pack lithium batteries is provided on the feeding tray.

[0009] The delivery tray has multiple inlets, and a first stop hook is provided below each inlet. A feeding pusher is elastically installed below the delivery tray to push the soft-pack lithium battery that falls into the inlet onto the groove.

[0010] A transmission assembly is installed on the support column to synchronize the rotation of the turntable and the rotating rod.

[0011] A second hook is fixedly installed at one end of the material storage box near the delivery tray. Positioning blocks are fixedly installed on both sides of the inlet. A V-shaped circulation groove is opened on the rotating rod. A guide rod that cooperates with the V-shaped circulation groove is fixedly installed on the inner wall of the feeding tray to control the material storage box to move closer to or away from the inlet. The feeding tray is slidably connected to the worktable through a positioning slide rod.

[0012] The bottom of the delivery tray is provided with a mounting block, which is fixedly connected to the workbench via a mounting frame. The feeding pusher is elastically mounted on the mounting block. The bottom of the delivery tray is provided with a circulation guide groove, and one end of the feeding pusher extends into the interior of the circulation guide groove. The circulation guide groove extends toward the inlet.

[0013] A feeding box with an opening at the top is fixedly installed on the workbench. Inside the feeding box, a pouring block with inclined ends is slidably installed. The outer wall of the pouring block is fixedly connected to the feeding tray through a connecting rod.

[0014] A dispensing box is fixedly installed at the bottom of the dispensing box. An adjustment block is fixedly installed on both sides of the inside of the dispensing box. A feeding rail is provided between the two adjustment blocks. The other end of the feeding rail extends to the top of the storage box.

[0015] The bottom end of the pouring block is attached to the inner wall of the feeding box, and the length of the dispensing box is greater than the length of the feeding box.

[0016] A receiving block is fixedly installed inside the feeding rail for receiving soft-pack lithium batteries that slide off the attitude adjustment block. A cam is rotatably installed inside the feeding rail, and a push rod is rotatably installed at the other end of the cam. A locking tooth is fixedly installed at the top of the push rod for conveying the soft-pack lithium batteries that fall on the receiving block toward the storage box by swinging the push rod.

[0017] The bracket has a tensioning roller mounted inside via a torsion spring. A pull rope is fixedly connected to the tensioning roller, and the other end of the pull rope passes through the bracket and is fixedly connected to the clamping plate.

[0018] A sector-shaped gear disk is fixedly installed on the outer wall of the support column. A transmission rod is rotatably installed inside the tightening roller. A rotating gear that meshes with the sector-shaped gear disk is fixedly installed at the bottom end of the transmission rod. A transmission block is rotatably installed inside the bracket. A ratchet is fixedly installed on the outer wall of the transmission block. A ratchet bar for blocking the ratchet is elastically installed inside the bracket. A first locking block is elastically installed on the transmission rod. A first locking groove is opened on the inner wall of the tightening roller. One end of the tightening roller extends into the interior of the transmission block. A second locking block is elastically installed on the outer wall of the tightening roller. A second locking groove is opened on the inner wall of the transmission block.

[0019] The beneficial effects of this invention are as follows:

[0020] 1. The automatic tab positioning mechanism for top sealing of soft-pack lithium batteries described in this invention, through the cooperation of a rotary table, a bracket, a clamping plate, and a pneumatic extrusion table set on the worktable, places the soft-pack lithium battery in the groove, the clamping plate elastically holds it, and when the rotary table rotates to deliver the soft-pack lithium battery to the bottom of the top sealing table, the pneumatic extrusion table accurately positions the electrode part from below, while the top sealing table presses down to complete the sealing. This structure performs dual positioning of the soft-pack lithium battery before sealing, effectively avoiding the offset problem during the transfer process, ensuring the accurate alignment of the aluminum-plastic film heat-sealing area with the tab, improving the sealing and insulation performance of the packaging, and significantly reducing the risk of electrolyte leakage.

[0021] 2. The automatic positioning mechanism for the tabs of the top seal of a soft-pack lithium battery described in this invention utilizes an automatic feeding system consisting of a delivery tray driven by a rotary rod, a storage box, and a feeding pusher. This system, along with a V-shaped circulation groove and a guide rod controlling the reciprocating motion of the storage box, achieves precise transfer of the soft-pack lithium battery from the storage box to the inlet. The feeding pusher pushes the soft-pack lithium battery in the inlet into the groove of the support through the trajectory of the circulation guide groove. The synchronous rotation of the rotary table completes continuous feeding. This design achieves automated conveying through mechanical linkage, saving manpower while ensuring the positioning accuracy of the soft-pack lithium battery feeding process and avoiding deviation problems caused by manual operation. Attached Figure Description

[0022] The invention will now be further described with reference to the accompanying drawings.

[0023] Figure 1 This is a perspective view of the present invention;

[0024] Figure 2 This is a schematic diagram of the material pouring block in this invention;

[0025] Figure 3 In this invention Figure 2 Enlarged view of point A in the image;

[0026] Figure 4 This is a schematic diagram of the V-shaped circulation groove in this invention;

[0027] Figure 5 is the bottom view of the delivery tray in the application;

[0028] Figure 6 is the schematic diagram of the soft package lithium battery loading in the application;

[0029] Figure 7 is the Figure 6 enlarged view at B in the figure.

[0030] In the figure: 1, workbench; 2, support column; 3, wheel rotating disc; 4, pneumatic extrusion table; 5, top sealing table; 6, clamping plate; 7, support; 8, loading tray; 9, storage box; 10, delivery tray; 11, rotating rod; 12, V-shaped circulating groove; 13, guide rod; 14, feeding inlet; 15, positioning block; 16, loading push block; 17, circulating guide groove; 18, mounting block; 19, recess; 20, pull rope; 21, fan-shaped toothed disc; 22, rotating gear; 23, transmission rod; 24, tightening roller; 25, first clamping block; 26, second clamping block; 27, transmission block; 28, ratchet rod; 29, discharging box; 30, distributing box; 31, discharging block; 32, connecting rod; 33, posture adjusting block; 34, feeding rail; 35, receiving block; 36, push rod; 37, cam. DETAILED DESCRIPTION

[0031] In order to make the technical means, creative features, purposes and effects realized by the application easy to understand, the application is further described below in combination with specific embodiments.

[0032] The workbench 1 is provided with the top sealing table 5;

[0033] The workbench 1 is fixedly provided with the support column 2, the top end of the support column 2 is rotatably provided with the wheel rotating disc 3, the wheel rotating disc 3 is fixedly provided with a plurality of supports 7, the supports 7 are provided with the recess 19 for placing the soft package lithium battery, the supports 7 are elastically provided with the clamping plate 6 for clamping the soft package lithium battery, and the lower portion of the support 7 is provided with the pneumatic extrusion table 4 for positioning the soft package lithium battery;

[0034] The soft package lithium battery to be top sealed is placed on the recess 19, then the soft package lithium battery is limited by the clamping plate 6, then the soft package lithium battery clamped is rotated to the lower portion of the top sealing table 5 (the pneumatic extrusion table 4 is located directly below the top sealing table 5) by the rotation of the wheel rotating disc 3, at this time, the pneumatic extrusion table 4 located below the support 7 slides towards the support 7 and clamps the electrode portion of the soft package lithium battery from below, at the same time, the top sealing table 5 above slides downwards and seals the soft package lithium battery, by positioning the soft package lithium battery before top sealing, the problem of offset during transfer leading to the decline of sealing performance can be solved, the risk of electrolyte leakage is effectively reduced, at the same time, the region of the tab and the aluminum plastic film heat sealing is more accurate, and the insulation performance is improved.

[0035] The workbench 1 is rotatably provided with a rotating rod 11, the rotating rod 11 is fixedly provided with a delivery disc 10, and the rotating rod 11 is slidably provided with a feeding disc 8, and the feeding disc 8 is provided with a material hiding box 9 for placing soft-pack lithium batteries;

[0036] The delivery disc 10 is provided with a plurality of material inlets 14, the material inlets 14 are provided with first blocking hooks below, and the delivery disc 10 is elastically provided with a feeding push block 16 below, for pushing the soft-pack lithium batteries falling into the material inlets 14 to the grooves 19;

[0037] The first blocking hooks provided below the material inlets 14 can block the soft-pack lithium batteries entering the material inlets 14, and the two first blocking hooks are symmetrically provided at two long edges of the material hiding box 9, so that the soft-pack lithium batteries need to be pushed from the wide edges of the material inlets 14 after being blocked by the two first blocking hooks, and the reciprocating sliding track of the feeding push block 16 is at the wide edges of the material inlets 14.

[0038] The rotating rod 11 drives the delivery disc 10 to rotate when rotating, the material inlets 14 are provided with four, when the soft-pack lithium batteries in the material hiding box 9 enter one of the material inlets 14, the soft-pack lithium batteries falling into the material inlets 14 are sent to the position of the support 7 through the rotation of the material inlets 14, at this time, the feeding push block 16 provided at the bottom of the delivery disc 10 can push the soft-pack lithium batteries to the grooves 19, the soft-pack lithium batteries on the grooves 19 are clamped by the elastically provided clamping plates 6, the positioning before the top sealing of the soft-pack lithium batteries can solve the problem of deviation in the transfer process, causing the sealing performance of the sealing to decrease, effectively reducing the risk of electrolyte leakage, and making the area of the tab and the aluminum plastic film heat sealing more accurate and improving the insulation performance.

[0039] The support 2 is provided with a transmission assembly for synchronizing the rotation of the wheel rotating disc 3 and the rotating rod 11.

[0040] The transmission assembly is a common belt wheel transmission, which can synchronize the rotation of the wheel rotating disc 3 and the rotating rod 11, so that the delivery disc 10 on the rotating rod 11 has the same rotation track as the wheel rotating disc 3, so when the wheel rotating disc 3 rotates 90°, the delivery disc 10 also rotates 90°, since the position of the material hiding box 9 is fixed, when the delivery disc 10 rotates 90°, the material inlet 14 corresponding to the material hiding box 9 can be put into a soft-pack lithium battery, and the continuous rotation of the delivery disc 10 can rotate the material inlet 14 with the soft-pack lithium battery to the end close to the support 7, and finally the soft-pack lithium battery can be pushed to the groove 19 by the feeding push block 16.

[0041] As the preferred embodiment in the application, the second hook is fixedly installed on one end of the storage box 9 close to the delivery disc 10, the positioning block 15 is fixedly installed on both sides of the inlet 14, the V-shaped circulating groove 12 is opened on the rotating rod 11, the guide rod 13 matched with the V-shaped circulating groove 12 is fixedly installed on the inner wall of the feeding disc 8, and the feeding disc 8 is slidably connected with the workbench 1 through the positioning slide rod.

[0042] The second hook is symmetrically arranged at the wide edge of the bottom of the storage box 9, which is used for limiting the falling of the soft-pack lithium battery in the storage box 9, and the soft-pack lithium battery can be pushed out by pushing from the long edge of the storage box 9.

[0043] When the rotating rod 11 rotates, the feeding disc 8 drives the storage box 9 to reciprocate on the outer wall of the rotating rod 11, when the feeding disc 8 slides upwards, the storage box 9 moves away from the delivery disc 10, and when the feeding disc 8 slides downwards, the storage box 9 moves close to the delivery disc 10.

[0044] When the storage box 9 moves close to the delivery disc 10 and the second hook is attached to the delivery disc 10, the positioning block 15 arranged on both sides of the inlet 14 below the storage box 9 is blocked on both sides of the soft-pack lithium battery, the soft-pack lithium battery is taken off from the storage box 9 by rotating the delivery disc 10, and is retained in the inlet 14 for subsequent feeding with the feeding push block 16, the automatic feeding is realized by the synchronous rotation of the rotating rod 11 and the rotating disc 3, and the problems of deviation in the transfer process and the decline of the sealing performance of the package are solved.

[0045] As the preferred embodiment in the application, the bottom end of the delivery disc 10 is provided with the mounting block 18, the mounting block 18 is fixedly connected with the workbench 1 through the mounting frame, the feeding push block 16 is elastically installed on the mounting block 18, the bottom end of the delivery disc 10 is provided with the circulating guide groove 17, one end of the feeding push block 16 extends into the circulating guide groove 17, and the circulating guide groove 17 extends in the direction of the inlet 14.

[0046] The installation of the mounting block 18 makes the feeding push block 16 always face the direction of the support 7, since the feeding inlet 14 is provided with four, the circulating guide groove 17 also has four extension positions, which correspond to each feeding inlet 14, when the delivery disc 10 rotates, the feeding push block 16 will slide in the circulating guide groove 17, when sliding to the position corresponding to the feeding inlet 14, under the action of the extension of the circulating guide groove 17, at this time the feeding push block 16 will slide from the wide edge of the feeding inlet 14 to the direction away from the mounting block 18, and then push the soft pack lithium battery in the feeding inlet 14 to the groove 19 on the support 7, and through the rotation of the delivery disc 10 and the wheel rotating disc 3, the continuous feeding of the soft pack lithium battery can be realized, the packaging efficiency is improved, and the problem of offset during transfer is solved, which leads to the problem of reduced packaging sealing.

[0047] As a preferred embodiment of the present application, the workbench 1 is fixedly provided with a feeding box 29 with an open top, and two ends of the feeding box 29 are provided with a tilting arrangement. The outer wall of the feeding block 31 is fixedly connected with the feeding disc 8 through the connecting rod 32.

[0048] The bottom end of the feeding box 29 is fixedly provided with a distribution box 30, and the inside of the distribution box 30 is fixedly provided with a posture adjusting block 33 on both sides. The feeding track 34 is arranged between the two posture adjusting blocks 33, and the other end of the feeding track 34 extends above the hidden box 9.

[0049] The bottom end of the feeding block 31 is attached to the inner wall of the feeding box 29, and the length of the distribution box 30 is greater than the length of the feeding box 29.

[0050] When the soft pack lithium battery is placed in the feeding box 29, the plurality of soft pack lithium batteries will be divided into two parts and slide downward under the action of the feeding block 31. Since the feeding block 31 is fixedly connected with the feeding disc 8 through the connecting rod 32, when the feeding disc 8 drives the hidden box 9 to slide up and down on the outer wall of the rotating rod 11, the feeding block 31 will also slide up and down in the feeding box 29. When the feeding block 31 slides downward in the feeding box 29 and slides into the inside of the distribution box 30, a gap is formed between the bottom end of the feeding block 31 and the inner cavity of the distribution box 30. At this time, the soft pack lithium batteries retained on both sides of the feeding block 31 will fall into the inside of the distribution box 30. Since the cell in the soft pack lithium battery is heavy, the weight of the cell will assist the soft pack lithium battery to turn and complete the correction of the posture during the falling process. The soft pack lithium battery slides into the inside of the feeding track 34 under the slope of the posture adjusting block 33. Since the sliding of the feeding disc 8 is intermittent, the soft pack lithium battery can be intermittently transported towards the distribution box 30 through the continuous reciprocating sliding of the feeding block 31.

[0051] As a preferred embodiment in the present application, the inside of the feeding rail 34 is fixedly provided with a receiving block 35 for receiving the soft-pack lithium battery falling from the posture adjusting block 33, the inside of the feeding rail 34 is rotatably provided with a cam 37, the other end of the cam 37 is rotatably provided with a pushing rod 36, the top end of the pushing rod 36 is fixedly provided with a clamping tooth for conveying the soft-pack lithium battery falling on the receiving block 35 to the direction of the material hiding box 9 through the swing of the pushing rod 36.

[0052] The inside of the support 7 is rotatably provided with a tightening roller 24 through a torsion spring, the tightening roller 24 is fixedly connected with a pull rope 20, the other end of the pull rope 20 is fixedly connected with the clamping plate 6 through the support 7.

[0053] The soft-pack lithium battery falling to the feeding rail 34, the cell part will be clamped in the inside of the receiving block 35, the bottom end of the receiving block 35 is provided with an opening, by controlling the rotation of the cam 37, the pushing rod 36 will be swung at the bottom of the receiving block 35, through the eccentric rotation, the clamping tooth provided above the pushing rod 36 can move the soft-pack lithium battery to the direction of the material hiding box 9, until the soft-pack lithium battery falls into the inside of the material hiding box 9 in turn.

[0054] Under normal circumstances, the support 7 is in an open state under the action of elasticity, when the tightening roller 24 rotates and winds the pull rope 20, the clamping plate 6 can be pulled down until the soft-pack lithium battery on the support 7 is clamped.

[0055] As a preferred embodiment in the present application, the outer wall of the support column 2 is fixedly provided with a sector tooth disc 21, the inside of the tightening roller 24 is rotatably provided with a transmission rod 23, the bottom end of the transmission rod 23 is fixedly provided with a rotating gear 22 engaged with the sector tooth disc 21, the inside of the support 7 is rotatably provided with a transmission block 27, the outer wall of the transmission block 27 is fixedly provided with a ratchet wheel, the inside of the support 7 is elastically provided with a ratchet rod 28 for blocking the ratchet wheel, the transmission rod 23 is elastically provided with a first clamping block 25, the inner wall of the tightening roller 24 is provided with a first clamping groove, one end of the tightening roller 24 extends to the inside of the transmission block 27, the outer wall of the tightening roller 24 is elastically provided with a second clamping block 26, the inner wall of the transmission block 27 is provided with a second clamping groove.

[0056] The first clamping block 25 and the second clamping block 26 are both provided in an inclined manner, the inclined surface provided on the first clamping block 25 (the elastic force of the top pressing spring provided in the inside of the first clamping block 25 is greater than that of the coil spring) can be fitted with the first clamping groove when rotating counterclockwise, the inclined surface provided on the second clamping block 26 can be fitted with the second clamping groove when rotating clockwise.

[0057] When the rotating disc 3 rotates counterclockwise, the support 7 rotates circumferentially, at this time, the transmission rod 23 arranged inside the tightening roller 24 will rotate counterclockwise at the same time under the cooperation of the rotating gear 22 and the sector gear 21, the first clamping block 25 can drive the tightening roller 24 to rotate counterclockwise, at the same time, the second clamping block 26 drives the ratchet wheel to rotate counterclockwise (the ratchet rod 28 only blocks the clockwise rotation of the ratchet wheel), and the torsional spring arranged on the tightening roller 24 also deforms and stores elastic potential energy, when the clamping plate 6 and the support 7 are attached, at this time, the transmission rod 23 cannot drive the tightening roller 24 to continue to wind the pull rope 20 through the first clamping block 25, until the support 7 drives the soft pack lithium battery to be packaged, at this time, the rotating gear 22 will be in contact with the vacancy on the sector gear 21, the rotating gear 22 is disengaged, the torsional spring releases the elastic potential energy, drives the tightening roller 24 to rotate clockwise, at this time, the second clamping block 26 also rotates inside the ratchet wheel under the action of the inclined surface, and is not blocked by the ratchet rod 28, so that the tightening roller 24 releases the winding of the pull rope 20, the clamping plate 6 is away from the support 7, which is convenient for the installation of the soft pack lithium battery next time, through the positioning of the soft pack lithium battery, the problem of deviation in the transfer process is solved, the sealing performance of the packaging is reduced, the risk of electrolyte leakage is effectively reduced, and the hot sealing area of the tab and the aluminum plastic film is more accurate, and the insulation performance is improved.

[0058] The above-mentioned front, rear, left, right, up and down are based on the drawings of the specification Figure 1 As a standard, the side of the device facing the observer is defined as the front, the left side of the observer is defined as the left, and so on.

[0059] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the scope of protection of the present application.

[0060] The basic principles, main features and advantages of the present application are shown and described above. Those skilled in the art should understand that the present application is not limited to the above-mentioned embodiments, and the above-mentioned embodiments and descriptions in the specification are only to illustrate the principles of the present application, and various changes and improvements can be made to the present application without departing from the spirit and scope of the present application, and these changes and improvements all fall within the scope of the present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. A soft pack lithium battery top sealing tab automatic positioning mechanism, comprising a workbench (1), wherein a top sealing table (5) is arranged on the workbench (1); characterized in that A support column (2) is fixedly installed on the workbench (1), a wheel rotating disc (3) is rotatably installed at the top end of the support column (2), a plurality of supports (7) are fixedly installed on the wheel rotating disc (3), a groove (19) for placing a soft pack lithium battery is formed in each support (7), a clamping plate (6) for clamping the soft pack lithium battery is elastically installed on the support (7), and a pneumatic extrusion table (4) for positioning the soft pack lithium battery is arranged below the support (7); A rotating rod (11) is rotatably installed on the workbench (1), a delivery disc (10) is fixedly installed on the rotating rod (11), and a feeding disc (8) is slidably installed on the rotating rod (11); a material storage box (9) for placing the soft pack lithium battery is arranged on the feeding disc (8); A plurality of feeding openings (14) are formed in the delivery disc (10), a first blocking hook is arranged below each feeding opening (14), and an upper feeding push block (16) is elastically installed below the delivery disc (10) and used for pushing the soft pack lithium battery falling into the feeding opening (14) to the groove (19); A transmission assembly is arranged on the support column (2) and used for synchronizing the rotation of the wheel rotating disc (3) and the rotating rod (11).

2. The automatic tab positioning mechanism for the top seal of a soft-pack lithium battery according to claim 1, characterized in that: A second blocking hook is fixedly installed at one end of the material storage box (9) close to the delivery disc (10), positioning blocks (15) are fixedly installed on the two sides of each feeding opening (14), a V-shaped circulating groove (12) is formed in the rotating rod (11), guide rods (13) matched with the V-shaped circulating groove (12) are fixedly installed on the inner wall of the feeding disc (8) and used for controlling the material storage box (9) to approach or move away from the feeding opening (14), and the feeding disc (8) is slidably connected with the workbench (1) through a positioning sliding rod.

3. The automatic tab positioning mechanism for the top seal of a soft-pack lithium battery according to claim 2, characterized in that: An installation block (18) is arranged at the bottom end of the delivery disc (10), the installation block (18) is fixedly connected with the workbench (1) through a mounting frame, the upper feeding push block (16) is elastically installed on the installation block (18), a circulating guide groove (17) is formed at the bottom end of the delivery disc (10), one end of the upper feeding push block (16) extends into the circulating guide groove (17), and the circulating guide groove (17) extends in the direction towards the feeding opening (14).

4. The automatic tab positioning mechanism for the top sealing of a soft-pack lithium battery according to claim 3, characterized in that: A material placing box (29) with an open top is fixedly installed on the workbench (1), two ends of an inverted material block (31) are slidably installed in the material placing box (29), and the outer wall of the inverted material block (31) is fixedly connected with the feeding disc (8) through a connecting rod (32); A material distribution box (30) is fixedly installed at the bottom end of the material placing box (29), and two posture adjusting blocks (33) are fixedly installed in the material distribution box (30); a feeding rail (34) is arranged between the two posture adjusting blocks (33), and the other end of the feeding rail (34) extends above the material storage box (9); The bottom end of the inverted material block (31) is attached to the inner wall of the material placing box (29), and the length of the material distribution box (30) is greater than the length of the material placing box (29).

5. The automatic tab positioning mechanism for the top seal of a soft-pack lithium battery according to claim 4, characterized in that: The inside of the feeding rail (34) is fixedly provided with a receiving block (35) for receiving the soft-pack lithium battery falling from the posture adjusting block (33), the inside of the feeding rail (34) is rotatably provided with a cam (37), the other end of the cam (37) is rotatably provided with a pushing rod (36), the top end of the pushing rod (36) is fixedly provided with a clamping tooth for conveying the soft-pack lithium battery falling on the receiving block (35) to the direction of the material hiding box (9) through the swing of the pushing rod (36).

6. The automatic tab positioning mechanism for the top seal of a soft-pack lithium battery according to claim 5, characterized in that: The inside of the support (7) is rotatably provided with a tightening roller (24) through a torsion spring, the tightening roller (24) is fixedly connected with a pull rope (20), the other end of the pull rope (20) is fixedly connected with the clamping plate (6) through the support (7).

7. The automatic tab positioning mechanism for the top seal of a soft-pack lithium battery according to claim 6, characterized in that: The outer wall of the support column (2) is fixedly provided with a sector tooth disc (21), the inside of the tightening roller (24) is rotatably provided with a transmission rod (23), the bottom end of the transmission rod (23) is fixedly provided with a rotating gear (22) engaged with the sector tooth disc (21), the inside of the support (7) is rotatably provided with a transmission block (27), the outer wall of the transmission block (27) is fixedly provided with a ratchet wheel, the inside of the support (7) is elastically provided with a ratchet rod (28) for blocking the ratchet wheel, the transmission rod (23) is elastically provided with a first clamping block (25), the inner wall of the tightening roller (24) is provided with a first clamping groove, one end of the tightening roller (24) extends to the inside of the transmission block (27), the outer wall of the tightening roller (24) is elastically provided with a second clamping block (26), the inner wall of the transmission block (27) is provided with a second clamping groove.

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