Lithium battery cap pressure welding device

Abstract

The invention provides a lithium battery cap pressure welding device, and relates to the technical field of lithium battery cap machining, the lithium battery cap pressure welding device comprises a cap pressure welding seat, a pressure welding mechanism is mounted on the rear edge of the upper portion of the cap pressure welding seat through a support, a motor placement cavity is formed in the center of the upper surface of the cap pressure welding seat, and a circulating servo motor is fixedly connected to the interior of the motor placement cavity; the assembling tool can be suitable for circular caps and poles of different specifications and sizes, is provided with a self-adaptive adjusting mechanism, and does not need to re-debug equipment tools and positioning groove structures for assembling the lithium battery caps and poles of different product specifications, so that the production cost is reduced, the production efficiency is improved, and the production efficiency is improved. The problems that an existing pressure welding device for the lithium battery caps is poor in adaptability to the lithium battery caps of different specifications, equipment tools and positioning groove structures need to be re-debugged for assembling the lithium battery caps and pole columns of different product specifications, the production cost is increased, and the production efficiency is reduced are solved.

Description

Technical Field

[0001] The invention relates to the technical field of lithium battery cap processing, and in particular to a lithium battery cap pressure welding device. Background Art

[0002] The lithium battery cap is a core component to ensure the safety and sealing of the battery. The welding quality between the cap and the battery pole is not only directly related to the internal sealing performance of the battery and prevents electrolyte leakage, but also profoundly affects the battery's electrical performance, cycle life and overall safety. The battery cap and pole are usually assembled using precise pressure welding technology to achieve the combination between the cap and the pole.

[0003] For the traditional pressure welding assembly device of the cap and the battery pole, it is necessary to select a special positioning groove or assembly tooling according to the specifications of the battery cap and the battery pole to ensure that the cap and the pole have a high coaxiality during pressure welding and reduce the pressure welding error. The existing pressure welding device for lithium battery caps has poor adaptability to lithium battery caps of different specifications. Therefore, for the assembly of lithium battery caps and poles of different product specifications, it is necessary to re-adjust the equipment tooling and positioning groove structure, which increases production costs and reduces production efficiency. Summary of the invention

[0004] The invention relates to a lithium battery cap pressure welding device, so as to solve the problem that for a traditional pressure welding assembly device of a cap and a battery pole, it is necessary to select a special positioning groove or assembly tooling according to the specifications of the battery cap and the battery pole, so as to ensure that the cap and the pole have a high coaxiality during pressure welding and reduce the pressure welding error. However, the existing lithium battery cap pressure welding device has poor adaptability to lithium battery caps of different specifications. Therefore, for the assembly of lithium battery caps and poles of different product specifications, it is necessary to re-adjust the equipment tooling and the positioning groove structure, which increases the production cost and reduces the production efficiency.

[0005] The present invention provides a lithium battery cap pressure welding device, which specifically comprises: a cap pressure welding seat, a pressure welding mechanism is installed on the upper rear edge of the cap pressure welding seat through a bracket, a motor placement cavity is opened at the center of the upper surface of the cap pressure welding seat, a circulating servo motor is fixedly connected inside the motor placement cavity, a rotating pressure welding table is fixedly connected to the upper end of the rotating shaft of the circulating servo motor, a positioning adjustment ring is fixedly connected to the upper surface of the cap pressure welding seat, a cap placement opening is opened on the rotating pressure welding table, a unit support plate is fixedly connected inside the cap placement opening, four support plate slide grooves are opened on the unit support plate, and the center of the lower surface of the rotating pressure welding table is vertically welded There is a support plate guide rod, on which a trigger push block, a cap centering push block and a pole centering push block are slidably sleeved, the cap centering push block is located above the trigger push block, a settlement tension spring is fixedly connected between the trigger push block and the cap centering push block, the pole centering push block is located above the cap centering push block, a compensation tension spring is fixedly connected between the cap centering push block and the pole centering push block, the cap centering push block is hinged with two cap centering connecting rods, the upper end of the cap centering connecting rod is hinged with a cap centering slider, the two cap centering sliders are respectively slidably connected in the two support plate slide grooves, and a cap alignment splint is welded above the cap centering slider.

[0006] Furthermore, the pole centering push block is hinged with two pole centering connecting rods, the upper ends of the pole centering connecting rods are hinged with pole centering sliders, the two pole centering sliders are respectively slidably connected in the two support plate slide grooves, and the upper ends of the pole centering sliders are welded with pole alignment clamps.

[0007] Furthermore, a visual inspection mechanism is installed on the upper side of the cap pressure welding seat through a bracket.

[0008] Furthermore, the positioning adjustment ring is a circular plate, and the positioning adjustment ring is coaxial with the rotary pressure welding table.

[0009] Furthermore, the positioning adjustment ring is divided into three parts: a front arc plate, a sloped arc plate, and a rear arc plate. The front arc plate and the rear arc plate are parallel to each other, and the front arc plate is higher than the rear arc plate.

[0010] Furthermore, the front arc plate is located at the front half of the positioning and adjusting ring, and the rear arc plate is located at the rear half of the positioning and adjusting ring. The front arc plate and the rear arc plate are connected by an inclined bevel arc plate.

[0011] Furthermore, there are a total of sixteen cap placement openings, and the sixteen cap placement openings are grouped in pairs to form eight cap placement groups, and the eight cap placement groups are radially distributed on the rotary pressure welding table.

[0012] Furthermore, a guide rod convex strip is provided on the outer surface of the support plate guide rod, and a sliding groove slidably connected to the guide rod convex strip is provided on the central guide hole wall of the trigger push block, the cap centering push block and the pole centering push block.

[0013] Furthermore, the bottom of the trigger push block is rotatably connected to a lifting push wheel through a bracket and a bearing. The lifting push wheel is made of a magnet. The lifting push wheel is rollingly connected to the lower surface of the positioning adjustment ring, and the lifting push wheel and the lower surface of the positioning adjustment ring form a magnetic connection.

[0014] Furthermore, the four pallet slots in the unit pallet are distributed in a "cross" shape, and the two cap centering sliders are respectively slidably connected in two of the four pallet slots facing oppositely, and the two cap alignment clamps are in a "V" shape, and the openings of the cap alignment clamps are facing the center direction of the unit pallet.

[0015] Furthermore, the two pole centering sliders are respectively slidably connected in the other two support plate sliding grooves, and the two pole alignment clamps are in a "V" shape, with the openings of the pole alignment clamps facing the center direction of the unit support plate.

[0016] The present invention provides a lithium battery cap pressure welding device, which has the following beneficial effects: The present invention improves the pole and cap welding station for lithium battery cap welding, has a built-in mechanical auxiliary positioning structure, and is provided with an auxiliary alignment structure in the unit support plate, so that the cap and the pole can be automatically aligned to the center position of the unit support plate after being placed on the unit support plate, so that the cap and the pole remain coaxial before welding, ensuring high precision and high quality of the product after welding is completed.

[0017] The present invention has an automatic centering function for the pole and the cap, so that the pole and the cap placed inside the cap placement opening are automatically centered and kept coaxial, and this function can be applied to circular caps and poles of different specifications and sizes, and has an adaptive adjustment mechanism. For the assembly of lithium battery caps and poles of different product specifications, there is no need to re-adjust the equipment tooling and positioning groove structure, thereby reducing production costs and improving production efficiency.

[0018] The automatic centering function of the pole and the cap in the present invention is achieved through the cooperation of a series of transmission mechanisms. There is no need to set components such as electric push cylinders and electromagnetic push cylinders in the rotary pressure welding table. The equipment has low manufacturing and operating costs, and is easy to maintain and operate. It can automatically complete the centering and fixation of the cap and the pole when they approach the pressure welding mechanism, and automatically release the clamping of the workpiece after the pressure welding is completed, which is convenient for robot or manual loading and unloading. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solution of the embodiment of the present invention, the drawings of the embodiment are briefly introduced below.

[0020] The drawings described below are only related to some embodiments of the present invention, but are not intended to limit the present invention.

[0021] In the attached picture: Figure 1 A schematic diagram showing the overall structure of the present application; Figure 2 The structural diagram at the bottom of this application is shown; Figure 3 A schematic diagram of the structure of the positioning and adjusting ring of the present application is shown; Figure 4 The structural schematic diagram of the rotary welding station of the present application is shown; Figure 5 A schematic diagram of the structure of the bottom of the rotary welding table of the present application is shown; Figure 6 It shows a schematic diagram of the structure when the cap alignment clamping plate and the pole alignment clamping plate of the present application are not clamping the workpiece; Figure 7 It shows a schematic diagram of the structure of the cap alignment clamping plate and the pole alignment clamping plate of the present application when clamping a workpiece; Figure 8 Shows this application Figure 6 A schematic diagram of the structure at the bottom of FIG. Fig. 9 Shows this application Figure 7 A schematic diagram of the structure at the bottom of FIG. Fig.10 Shows this application Figure 7 A schematic diagram of the front view of the structure; Fig.11 A schematic diagram of the structure of the clamping structure of the present application is shown; Fig.12 This application shows Figure 5 A schematic diagram of the partially enlarged structure at point A in the middle; Fig.13 This application shows Figure 5 Schematic diagram of the partially enlarged structure at point B in the middle.

[0022] Reference numerals list 1. Cap welding seat; 101. Motor placement cavity; 2. Welding mechanism; 3. Visual inspection mechanism; 4. Circular servo motor; 5. Positioning adjustment ring; 501. Front arc plate; 502. Inclined arc plate; 503. Rear arc plate; 6. Rotary welding table; 601. Cap placement opening; 602. Unit support plate; 603. Support plate slide groove; 604. Support plate guide rod; 605. Guide rod convex strip; 7. Trigger push block; 701. Lifting push wheel; 702. Settling spring; 8. Cap centering push block; 801. Cap centering connecting rod; 802. Cap centering slider; 9. Pole centering push block; 901. Pole centering connecting rod; 902. Pole centering slider; 903. Compensating spring; 10. Cap alignment clamp; 11. Pole alignment clamp. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solution and advantages of the embodiment of the present invention clearer, the technical solution of the embodiment of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiment of the present invention. Obviously, the described embodiment is a part of the embodiment of the present invention, not all of the embodiments. Based on the described embodiment of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] Example 1: Please refer to Figures 1 to 13 : The present invention proposes a lithium battery cap pressure welding device, comprising: a cap pressure welding seat 1, a pressure welding mechanism 2 is installed on the upper rear edge of the cap pressure welding seat 1 through a bracket, a motor placement cavity 101 is opened at the center of the upper surface of the cap pressure welding seat 1, a circulating servo motor 4 is fixedly connected inside the motor placement cavity 101, a rotary pressure welding platform 6 is fixedly connected to the upper end of the rotating shaft of the circulating servo motor 4, a positioning adjustment ring 5 is fixedly connected to the upper surface of the cap pressure welding seat 1, a cap placement opening 601 is opened on the rotary pressure welding platform 6, a unit support plate 602 is fixedly connected inside the cap placement opening 601, four support plate slide grooves 603 are opened on the unit support plate 602, a support plate guide rod 604 is vertically welded to the center of the lower surface of the rotary pressure welding platform 6, a trigger push block 7, a cap centering push block 8 and a pole centering push block 9 are slidably sleeved on the support plate guide rod 604, and the cap centering push block 8 is located at the trigger push block. 7, a sinking tension spring 702 is fixedly connected between the trigger push block 7 and the cap centering push block 8, the pole centering push block 9 is located above the cap centering push block 8, a compensation tension spring 903 is fixedly connected between the cap centering push block 8 and the pole centering push block 9, the cap centering push block 8 is hinged with two cap centering connecting rods 801, the upper end of the cap centering connecting rod 801 is hinged with a cap centering slider 802, and the two cap centering sliders 80 2 are respectively slidably connected in the two support plate slide grooves 603, a cap alignment clamping plate 10 is welded above the cap centering slider 802, the pole centering push block 9 is hinged with two pole centering connecting rods 901, the upper end of the pole centering connecting rod 901 is hinged with a pole centering slider 902, the two pole centering sliders 902 are respectively slidably connected in the two support plate slide grooves 603, and the upper end of the pole centering slider 902 is fixedly connected with a pole alignment clamping plate 11;The circulating servo motor 4 drives the rotary welding table 6 to rotate counterclockwise, and the worker or the manipulator is located in front of the rotary welding table 6, and the lithium battery cap and the pole are placed inside the cap placement port 601 in front of the rotary welding table 6, and as the rotary welding table 6 rotates counterclockwise, it slowly approaches the welding mechanism 2. In the unit support plate 602 located in front of the rotary welding table 6, the compensation tension spring 903 and the sinking tension spring 702 are in a contracted state, and the lifting push wheel 701 is attached to the positioning adjustment ring 5 under the action of magnetic force. There is enough space between the two cap alignment clamps 10 and the two pole alignment clamps 11, and the space between the two cap alignment clamps 10 is larger than the space between the two pole alignment clamps 11. After the pole and the cap are placed, as the circulating servo motor 4 drives the rotating pressure welding table 6 to rotate under the support pressure welding mechanism 2, the lifting push wheel 701 rolls through the inclined arc plate 502 and enters under the rear end arc plate 503, pulling the trigger push block 7 downward, and the cap centering push block 8 and the pole centering push block 9 follow and move downward The cap centering link 801 and the pole centering link 901 are moved, and the cap centering slider 802 and the pole centering slider 902 are pulled toward the middle, so that the two pole alignment clamps 11 first fit the edge of the pole and push it toward the middle, and the pole is pushed to the center of the unit support plate 602 through the pole alignment clamps 11 of the "V" shape structure. At this time, the spacing of the pole alignment clamps 11 is fixed, the pole centering push block 9 is stationary, and as the rotary pressure welding table 6 continues to rotate, the trigger push block 7 continues to The pole and the cap are continuously pulled down, and the sinking tension spring 702 is stretched while exerting tension on the cap centering push block 8, so that the cap centering push block 8 continues to move downward and lengthens the compensation tension spring 903, and the cap centering slider 802 pulls the cap centering slider 802 toward the middle, so that the cap alignment clamping plate 10 fits with the edge of the cap, and pushes the cap to the center position of the unit support plate 602, so that the pole and the cap remain coaxial, and the two metal discs in the coaxial fitting state are pressure-welded by the pressure welding mechanism 2, so that the pressure welding of the pole and the cap can be completed. ;

[0025] In the disclosed embodiment, a visual inspection mechanism 3 is installed on the upper side of the cap welding seat 1 through a bracket. The visual inspection mechanism 3 is connected to a computer. The image is captured by the visual inspection mechanism 3 and transmitted to the computer, so that the workpiece can be visually inspected. The centering accuracy and position accuracy of the battery cap and the battery pole located inside the cap placement port 601 can be detected by the visual inspection mechanism 3. If the workpiece has deviations such as tilt or flipping, it can be discovered and handled in time.

[0026] In the disclosed embodiment, the positioning adjustment ring 5 is a circular plate body, the positioning adjustment ring 5 is made of iron material, the positioning adjustment ring 5 is coaxial with the rotary pressure welding table 6, and the positioning adjustment ring 5 is divided into three parts: a front arc plate 501, a bevel arc plate 502, and a rear end arc plate 503. The front arc plate 501 and the rear end arc plate 503 are parallel to each other, and the front arc plate 501 is higher than the rear end arc plate 503. The front arc plate 501 is located in the front half of the positioning adjustment ring 5, and the rear end arc plate 503 is located in the rear half of the positioning adjustment ring 5. The front arc plate 501 and the rear end arc plate 503 are connected by the inclined bevel arc plate 502. The bottom of the trigger push block 7 is rotatably connected with a lifting push wheel 701 through a bracket and a bearing. The lifting push wheel 701 is made of a magnet. The lifting push wheel 701 is rollingly connected to the lower surface of the positioning adjustment ring 5. The lifting push wheel 701 forms a magnetic connection with the lower surface of the positioning adjustment ring 5. The rolling connection and magnetic connection on the lower surface of the positioning adjustment ring 5, when the trigger push block 7 moves along the positioning adjustment ring 5 driven by the rotation of the rotary welding table 6, when the lifting push wheel 701 is located at the front arc plate 501, the sinking tension spring 702 and the compensation tension spring 903 are not stretched, and there is enough spacing between the two cap alignment clamps 10 and the two pole alignment clamps 11, and the poles and caps can be placed above the unit support plate 602 by a manipulator or manually, which is convenient for loading and unloading. As the rotary welding table 6 rotates, the lifting push wheel 701 enters the inclined arc plate 502, and as the lifting push wheel 701 rolls on the lower surface of the inclined arc plate 502, the trigger push block 7 is pulled downward, so that the cap centering push block 8 and the pole centering push block 9 move downward synchronously, and the cap alignment clamp 10 and the pole alignment clamp 11 are gradually controlled to move toward the middle direction of the unit support plate 602, so as to align and fix the poles and caps.

[0027] In the disclosed embodiment, there are a total of sixteen cap placement openings 601, and the sixteen cap placement openings 601 are grouped in pairs to form eight cap placement groups. The eight cap placement groups are radially distributed on the rotary welding table 6, so that multiple groups of caps and poles can be assembled synchronously.

[0028] In the disclosed embodiment, a guide rod protrusion 605 is provided on the outer surface of the support plate guide rod 604, and sliding grooves slidably connected to the guide rod protrusion 605 are provided on the walls of the central guide holes of the trigger push block 7, the cap centering push block 8 and the pole centering push block 9, thereby achieving a guiding effect, keeping the cap centering push block 8 and the pole centering push block 9 vertically lifted and lowered, and avoiding unnecessary errors.

[0029] Embodiment 2, on the basis of embodiment 1, the four tray slots 603 in the unit tray 602 are arranged in a "cross" shape, the two cap centering sliders 802 are respectively slidably connected in two of the four tray slots 603 facing oppositely, the two cap alignment clamps 10 are in a "V" shape, and the openings of the cap alignment clamps 10 are facing the center direction of the unit tray 602; the two pole centering sliders 902 are respectively slidably connected in the other two tray slots 603, the two pole alignment clamps 11 are in a "V" shape, and the pole alignment clamps The opening of 11 faces the center direction of the unit support plate 602; the "V"-shaped cap alignment clamp 10 and the pole alignment clamp 11 clamp the cap located above and the pole located below respectively. As the cap alignment clamp 10 and the pole alignment clamp 11 move toward the center direction of the unit support plate 602, their inner surfaces fit with the outer edge of the circular metal sheet, and the circular metal sheet can be moved to the center of the unit support plate 602, so that circular metal sheets of different sizes and specifications are coaxially arranged, ensuring coaxial welding of the pole and the cap, which is suitable for the assembly of poles and caps of different specifications.

[0030] The working principle of this embodiment is as follows: first, the rotary welding table 6 is driven to rotate counterclockwise by the circulating servo motor 4, and the worker or the manipulator is located in front of the rotary welding table 6, and the lithium battery cap and the pole are placed inside the cap placement port 601 in front of the rotary welding table 6, and slowly approach the welding mechanism 2 as the rotary welding table 6 rotates counterclockwise. In the unit support plate 602 located in front of the rotary welding table 6, the compensation tension spring 903 and the sinking tension spring 702 are in a contracted state, and the lifting push wheel 701 is fitted with the positioning adjustment ring 5 under the action of magnetic force, and there is enough space between the two cap alignment clamps 10 and the two pole alignment clamps 11, and the two cap alignment clamps The spacing between the plates 10 is greater than the spacing between the two pole alignment clamps 11. After the pole and the cap are placed, as the circulating servo motor 4 drives the rotating pressure welding table 6 to rotate under the support pressure welding mechanism 2, the lifting push wheel 701 rolls over the inclined arc plate 502 and enters under the rear end arc plate 503, pulling the trigger push block 7 downward, and the cap centering push block 8 and the pole centering push block 9 follow and move downward, and under the action of the cap centering connecting rod 801 and the pole centering connecting rod 901, the cap centering slider 802 and the pole centering slider 902 are lowered and pulled toward the middle, so that the two pole alignment clamps 11 first fit with the edge of the pole and push it toward the middle, through the "V" shape. The pole alignment clamp 11 of the structure pushes the pole to the center of the unit support plate 602. At this time, the spacing of the pole alignment clamp 11 is fixed, and the pole centering push block 9 is stationary. As the rotary pressure welding table 6 continues to rotate, the trigger push block 7 continues to be pulled down, and the settlement tension spring 702 is stretched while applying tension to the cap centering push block 8, so that the cap centering push block 8 continues to move downward and lengthens the compensation tension spring 903. The cap centering slider 802 pulls the cap centering slider 802 to the middle, so that the cap alignment clamp 10 fits the edge of the cap, and pushes the cap to the center position of the unit support plate 602, so that the pole and the cap remain coaxial, and the coaxial fit is achieved through the pressure welding mechanism 2. The two metal discs in the state are pressure-welded to complete the pressure welding of the pole and the cap. After the pressure welding is completed, with the continuous counterclockwise rotation of the rotary pressure welding table 6, the lifting and lowering push wheel 701 below the unit support plate 602 with the finished cap fixed thereon rolls over the inclined arc plate 502 and moves to the part of the front arc plate 501, and the trigger push block 7 is lifted up under the magnetic attraction of the lifting and lowering push wheel 701 and the positioning adjustment ring 5, and the sinking tension spring 702 and the compensation tension spring 903 are contracted, and the cap centering push block 8 and the pole centering push block 9 are moved up and reset, so that the cap alignment clamping plate 10 and the pole alignment clamping plate 11 are moved outward, and the welded cap can be removed manually or by a robot.

[0031] In this article, there are a few points to note: 1. The drawings of the embodiments of the present disclosure only involve structures related to the embodiments of the present disclosure, and other structures may refer to general designs.

[0032] 2. In the absence of conflict, the embodiments of the present disclosure and the features therein may be combined with each other to obtain new embodiments.

[0033] The above are only specific embodiments of the present disclosure, but the protection scope of the present disclosure is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present disclosure, which should be included in the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure should be based on the protection scope of the claims.

Claims

1. A lithium battery cap welding device, comprising: A cap pressure welding seat (1), wherein a pressure welding mechanism (2) is installed on the upper rear edge of the cap pressure welding seat (1) through a bracket, characterized in that a motor placement cavity (101) is opened at the center of the upper surface of the cap pressure welding seat (1), a circulating servo motor (4) is fixedly connected inside the motor placement cavity (101), a rotary pressure welding platform (6) is fixedly connected to the upper end of the rotating shaft of the circulating servo motor (4), a positioning adjustment ring (5) is fixedly connected to the upper surface of the cap pressure welding seat (1), a cap placement opening (601) is opened on the rotary pressure welding platform (6), a unit support plate (602) is fixedly connected inside the cap placement opening (601), four support plate slide grooves (603) are opened on the unit support plate (602), a support plate guide rod (604) is vertically welded at the center of the lower surface of the rotary pressure welding platform (6), and a trigger push block (7), a cap centering push block (8) and a pole centering push block (9) are slidably sleeved on the support plate guide rod (604) A sinking tension spring (702) is fixedly connected between the trigger push block (7) and the cap centering push block (8), a compensation tension spring (903) is fixedly connected between the cap centering push block (8) and the pole centering push block (9), the cap centering push block (8) is hinged with two cap centering connecting rods (801), the upper end of the cap centering connecting rod (801) is hinged with a cap centering slider (802), and the two cap centering sliders (802) are respectively slidably connected to the two support plates. In the slide groove (603), a cap alignment clamp (10) is welded above the cap centering slider (802); the pole centering push block (9) is hinged with two pole centering connecting rods (901); the upper end of the pole centering connecting rod (901) is hinged with a pole centering slider (902); the two pole centering sliders (902) are respectively slidably connected in the two support plate slide grooves (603); and the upper end of the pole centering slider (902) is welded with a pole alignment clamp (11).

2. A lithium battery cap pressure welding device according to claim 1, characterized in that: A visual inspection mechanism (3) is installed on the upper side of the cap pressure welding seat (1) via a bracket.

3. A lithium battery cap pressure welding device according to claim 1, characterized in that: The positioning adjustment ring (5) is a circular plate body, and the positioning adjustment ring (5) is coaxial with the rotary pressure welding table (6).

4. A lithium battery cap pressure welding device according to claim 3, characterized in that: The positioning adjustment ring (5) is divided into three parts: a front arc plate (501), a sloped arc plate (502), and a rear arc plate (503); the front arc plate (501) and the rear arc plate (503) are parallel to each other, and the front arc plate (501) is higher than the rear arc plate (503).

5. A lithium battery cap pressure welding device according to claim 4, characterized in that: The front arc plate (501) is located at the front half of the positioning and adjusting ring (5), and the rear arc plate (503) is located at the rear half of the positioning and adjusting ring (5). The front arc plate (501) and the rear arc plate (503) are connected via an inclined bevel arc plate (502).

6. A lithium battery cap pressure welding device according to claim 1, characterized in that: The cap placement openings (601) are provided with sixteen in total, and the sixteen cap placement openings (601) are grouped in pairs to form eight cap placement groups, and the eight cap placement groups are radially distributed and opened on the rotary pressure welding table (6).

7. A lithium battery cap pressure welding device according to claim 1, characterized in that: The outer surface of the support plate guide rod (604) is provided with a guide rod convex strip (605), and the central guide hole walls of the trigger push block (7), the cap centering push block (8) and the pole centering push block (9) are all provided with a sliding groove slidably connected to the guide rod convex strip (605).

8. A lithium battery cap pressure welding device according to claim 5, characterized in that: The bottom of the trigger push block (7) is rotatably connected to a lifting push wheel (701) via a bracket and a bearing. The lifting push wheel (701) is made of a magnet. The lifting push wheel (701) is rollingly connected to the lower surface of the positioning adjustment ring (5). The lifting push wheel (701) and the lower surface of the positioning adjustment ring (5) form a magnetic attraction connection.

9. A lithium battery cap pressure welding device according to claim 1, characterized in that: The four tray slide grooves (603) in the unit tray (602) are arranged in a "cross" shape, and the two cap centering sliders (802) are respectively slidably connected in two of the four tray slide grooves (603) facing opposite directions. The two cap alignment clamps (10) are in a "V" shape, and the openings of the cap alignment clamps (10) face the center direction of the unit tray (602).

10. A lithium battery cap pressure welding device according to claim 9, characterized in that: The two pole centering sliders (902) are respectively slidably connected in the other two support plate sliding grooves (603), and the two pole alignment clamps (11) are in a "V"-shaped structure, with the openings of the pole alignment clamps (11) facing the center direction of the unit support plate (602).

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