A welding mechanism for the positive and negative current collectors of a cylindrical lithium battery

Abstract

The present invention discloses a welding mechanism for the positive and negative current collectors of a cylindrical lithium battery, which relates to the technical field of welding mechanisms. The invention includes an operating table, on both sides of the top surface of the operating table, U-shaped plates are fixedly installed. At the inner bottom ends of the two U-shaped plates, an ultrasonic welder is slidably installed. On both sides of the top surface of the operating table, vertical ring frames are fixedly installed. The two vertical ring frames are located on the side away from each other of the two U-shaped plates. Inside the inner walls of the two vertical ring frames, a round rod is rotatably installed. On both sides of the outer wall of the round rod, spiral grooves are formed. The rotation directions of the two spiral grooves of the round rod are set to be opposite. On both sides of the outer wall of the round rod, triangular rings are rotatably installed. Through the present invention, the positive and negative electrodes of the cylindrical lithium battery can simultaneously weld the current collectors, thus avoiding the problem that when the welding mechanism is welding, the device needs to adjust the positions of the positive and negative electrodes of the cylindrical lithium battery for two weldings, resulting in cumbersome welding.

Description

Technical Field

[0001] The invention relates to the technical field of welding mechanisms, and in particular to a welding mechanism for positive and negative electrode current collectors of a cylindrical lithium battery. Background Art

[0002] The current collector plates of the positive and negative electrodes of cylindrical lithium batteries are important components of the battery. Their main function is to collect and distribute current to ensure the smooth flow of electric energy inside the battery. The welding mechanism of the positive and negative current collector plates of cylindrical lithium batteries refers to the equipment that welds the current collector plates to the positive and negative electrodes of cylindrical lithium batteries during the manufacturing process of cylindrical lithium batteries. This equipment can complete efficient, stable and precise welding work to ensure the normal operation and safe use of the battery.

[0003] The patent number CN209110384U discloses a cylindrical lithium battery cap welding mechanism, wherein an array mirror laser welding machine and a rocker linkage mechanism are arranged on a fixed frame, a guide rail is arranged on the upper surface of the fixed frame, a slider matching the guide rail is fixed on the bottom of the sliding plate, the slider is embedded in the guide rail, a battery positioning seat is arranged on the end of the sliding plate away from the array mirror laser welding machine, when in use, the array mirror laser welding machine is slidably connected to the upper surface of the fixed frame, a bolt adjustment mechanism is arranged on the fixed frame, the bolt adjustment mechanism is used to adjust the distance between the array mirror laser welding machine and the battery positioning seat, when in use, the structure of the patent can automatically position the battery on the jig and then weld it, thereby reducing labor intensity and improving welding safety performance and welding quality; the welding position can be adjusted to improve the quality of automatic welding of lithium batteries.

[0004] However, the current cylindrical lithium battery cap welding mechanism has the following problems: when the cylindrical lithium battery cap welding mechanism is in use, it is necessary to adjust the position of the positive and negative electrodes of the cylindrical lithium battery to weld the current collector plate, which causes the equipment to adjust the position of the positive and negative electrodes of the cylindrical lithium battery for two weldings, resulting in cumbersome welding. Therefore, we propose a welding mechanism for the positive and negative collector plates of cylindrical lithium batteries. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention provides a welding mechanism for positive and negative electrode current collectors of a cylindrical lithium battery, which solves the problems raised in the above-mentioned background technology.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: a welding mechanism for positive and negative collector plates of a cylindrical lithium battery, comprising an operating table, wherein U-shaped plates are fixedly installed on both sides of the top surface of the operating table, and ultrasonic welders are slidably installed on the bottom ends of the two U-shaped plates, and vertical ring frames are fixedly installed on both sides of the top surface of the operating table, and the two vertical ring frames are located on the side where the two U-shaped plates are away from each other, and round rods are rotatably installed on the inner walls of the two vertical ring frames, and spiral grooves are opened on both sides of the outer wall of the round rod, and the two spiral grooves of the round rod have opposite rotation directions, and triangular rings are rotatably installed on both sides of the outer wall of the round rod, and the inner walls of the two triangular rings are meshed with the inner walls of the two spiral grooves of the round rod, and the bottom surfaces of the two triangular rings are fixedly connected to the top surface of the ultrasonic welder, and a driving module is fixedly installed on the left side of the operating table, and the driving module includes a support frame and A servo motor is fixed on the left side of the bottom surface of the operating table, a servo motor is fixedly installed on the top surface of the support frame, the right side of the servo motor shaft of the driving module is fixedly connected to the left side of the round rod, an I-shaped column is fixed in the middle of the outer wall of the round rod, a belt is fixed on the top of the inner wall of the I-shaped column, a base is fixedly installed in the middle of the top surface of the operating table, two slide grooves are provided on the top surface of the base, a pulley is fixed in the middle of the back surface of the base, the inner wall of the pulley is slidably connected to the top surface of the belt, a U-shaped frame is slidably installed on the inner walls of the two slide grooves of the base, the back of the U-shaped frame is fixedly connected to the front surface of the belt, a semi-arc block is fixed at the bottom end of the U-shaped frame, and semicircular groove blocks are fixed on the left and right sides of the semi-arc block, the positive and negative electrodes of the cylindrical lithium battery can be welded to the collector plate at the same time, so that the cylindrical lithium battery can be welded twice without adjusting the position, and a reset component is arranged in the middle of the front of the base;

[0007] The reset assembly includes a rectangular plate, which is fixed in the middle of the front of the base, a cylinder is fixedly installed in the middle of the top surface of the rectangular plate, a sliding rod is slidably installed on the inner wall of the cylinder, a spring is arranged between the front of the sliding rod and the back of the inner wall of the cylinder, and the back of the sliding rod is fixedly connected to the front of the U-shaped frame. The spring in the cylinder pulls the sliding rod to move forward, the sliding rod pulls the U-shaped frame to move forward, and the U-shaped frame drives the cylindrical lithium battery in the semi-arc block to move forward, so that the cylindrical lithium battery can quickly return to the initial position after welding is completed;

[0008] Positioning devices are arranged on both sides of the front side of the U-shaped frame, and an anti-deviating device is arranged in the middle of the top surface of the positioning device.

[0009] According to the above technical solution, a welding head is arranged in the middle of the side where the two ultrasonic welders are close to each other, the belt is located above the base, a groove is arranged on the side where the two semicircular groove blocks are close to each other, and the side where the two semicircular groove blocks are far away from each other is on the movement trajectory of the two ultrasonic welders.

[0010] According to the above technical solution, the positioning device includes an L-shaped plate, a support plate, a thin column and a circular block. The L-shaped plate is fixed on both sides of the front side of the U-shaped frame. A strip groove is opened in the middle of the side where the two L-shaped plates are away from each other. Two welding heads of ultrasonic welders are arranged inside the strip grooves of the two L-shaped plates. The support plate is fixed on the front sides of the two L-shaped plates. The thin column is fixed on the side where the two L-shaped plates are close to each other. The two circular blocks are fixed on one end of several thin columns away from the two L-shaped plates. The circular block limits the welding head of the ultrasonic welder so that the welding head of the ultrasonic welder will not shift during welding.

[0011] According to the above technical solution, the two U-shaped plates are on the movement trajectory of the two abutment plates, the two circular blocks are located on the side away from each other of the two semicircular groove blocks, and the welding holes of the two circular blocks are aligned with the inner walls of the two semicircular groove blocks.

[0012] According to the above technical solution, the positioning device also includes a connecting rod, a roller and a concave guide rail. The connecting rod is fixed in the middle of the back side of the two L-shaped plates. The roller is rotatably installed at the bottom of the side where the two connecting rods are close to each other. The concave guide rail is fixed on both sides of the top surface of the operating table. The bottom end of the inner part of the concave guide rail is located below the two rollers. When the L-shaped plate moves backward, the roller on the connecting rod supports the L-shaped plate, allowing the L-shaped plate to move backward stably, thereby reducing the jitter generated when the L-shaped plate moves.

[0013] According to the above technical scheme, the anti-deviation device includes a circular shaft, a pressure plate, a short column, an arc-shaped elastic strip, a U-shaped rod and a baffle. The circular shaft is fixed in the middle of the top surfaces of the two circular blocks, the pressure plate is rotatably installed on the outer walls of the two circular shafts, the short column is fixed on the top surfaces of the two circular blocks, and a groove is provided on the side where the two short columns are close to each other. The arc-shaped elastic strip is embedded in the middle of the inner wall of the grooves of the two short columns, and one end of the two arc-shaped elastic strips away from the two short columns is fixed on the front of the two pressure plates, the U-shaped rod is fixed on both sides of the back of the base, and the baffle is fixed on the front of the two U-shaped rods. The pressure plate is above the cylindrical lithium battery, and the pressure plate limits the cylindrical lithium battery to the semi-arc block.

[0014] According to the above technical solution, the top surfaces of the two pressure plates are in an eight-shaped shape, the two short columns are arranged on the front sides of the two pressure plates, the baffle is located above the belt, and the baffle is on the movement trajectory of the two pressure plates.

[0015] According to the above technical solution, the anti-deviation device also includes a U-shaped frame, an arc-shaped spring sheet and a rubber block. The U-shaped frame is fixed to the bottom surfaces of the two pressure plates, the arc-shaped spring sheet is fixed to the inner walls of the two U-shaped frames, and the rubber block is slidably installed on the inner walls of the two U-shaped frames. The two rubber blocks are located below the two arc-shaped spring sheets. Under the elastic force of the arc-shaped spring sheets, the rubber blocks are against the top of the cylindrical lithium-ion battery.

[0016] The present invention provides a welding mechanism for positive and negative collector plates of cylindrical lithium batteries. It has the following beneficial effects:

[0017] (1) The present invention uses a vertical ring frame, a round rod, a triangular ring, a driving module, an I-shaped column, a belt, a base, a pulley, a U-shaped frame, a semi-arc block, a semi-circular groove block, a rectangular plate and a cylinder in conjunction with a slide rod, so that the positive and negative electrodes of the cylindrical lithium battery can be welded to the collecting plate at the same time, so that the cylindrical lithium battery does not need to adjust its position for two weldings, thereby preventing the welding mechanism from adjusting the position of the positive and negative electrodes of the cylindrical lithium battery for two weldings during welding, which causes cumbersome welding. In addition, the spring in the cylinder pulls the slide rod forward, and the slide rod pulls the U-shaped frame forward. The U-shaped frame drives the cylindrical lithium battery in the semi-arc block to move forward, so that the cylindrical lithium battery can quickly return to its initial position after welding is completed, thereby preventing the cylindrical lithium battery from staying in the device when the welding mechanism completes welding, which causes inconvenience in discharging the device.

[0018] (2) The present invention arranges the positioning device so that the positioning device, the L-shaped plate, the abutment plate, the thin column, the circular block, the connecting rod and the roller cooperate with the concave guide rail. The circular block limits the welding head of the ultrasonic welder so that the welding head of the ultrasonic welder will not shift during welding, thereby preventing the welding head in the welding mechanism from shifting and causing poor welding effect of the cylindrical lithium-ion battery collector. In addition, when the L-shaped plate moves backward, the roller on the connecting rod supports the L-shaped plate, allowing the L-shaped plate to move backward stably, reducing the jitter generated when the L-shaped plate moves, thereby preventing the jitter in the welding mechanism from causing poor equipment operation effect during welding.

[0019] (3) The present invention sets an anti-deviating device so that the round shaft, the pressure plate, the short column, the arc spring bar, the U-shaped rod, the baffle, the U-shaped frame and the arc spring sheet cooperate with the rubber block. The pressure plate is above the cylindrical lithium battery. The pressure plate limits the cylindrical lithium battery to the semi-arc block, thereby preventing the cylindrical lithium-ion battery from being shifted during welding by the welding mechanism, resulting in poor welding effect. In addition, under the elastic force of the arc spring sheet, the rubber block is pressed against the top of the cylindrical lithium-ion battery, thereby preventing the equipment parts of the welding mechanism from scratching the cylindrical lithium-ion battery shell and causing damage to the cylindrical lithium-ion battery shell during welding. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A schematic diagram of the present invention as a whole;

[0021] Figure 2 is a cross-sectional schematic diagram of a U-shaped plate of the present invention;

[0022] Figure 3 It is a cross-sectional schematic diagram of the vertical ring frame of the present invention;

[0023] Figure 4 For the present invention Figure 3 A local enlarged schematic diagram of the middle A;

[0024] Figure 5 is a cross-sectional schematic diagram of a positioning device of the present invention;

[0025] Figure 6 For the present invention Figure 5 A partial enlarged schematic diagram of point B in the middle;

[0026] Figure 7 is a cross-sectional schematic diagram of the anti-deviating device of the present invention;

[0027] Figure 8 For the present invention Figure 7 A partial enlarged schematic diagram of point C in the middle.

[0028] In the figure: 1, operating table; 2, U-shaped plate; 3, ultrasonic welder; 4, vertical ring frame; 5, positioning device; 51, L-shaped plate; 52, abutment plate; 53, thin column; 54, circular block; 55, connecting rod; 56, roller; 57, concave guide rail; 6, anti-deviating device; 61, round shaft; 62, pressure plate; 63, short column; 64, arc spring bar; 65, U-shaped rod; 66, baffle; 67, U-shaped frame; 68, arc spring sheet; 69, rubber block; 7, round rod; 8, triangular ring; 9, driving module; 10, I-shaped column; 11, belt; 12, base; 13, pulley; 14, U-shaped frame; 15, semi-arc block; 16, semi-circular groove block; 17, rectangular plate; 18, cylinder; 19, slide rod. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0030] See also Figure 1-Figure 8 , one embodiment of the present invention is: a welding mechanism for positive and negative collector plates of cylindrical lithium batteries, comprising an operating table 1, U-shaped plates 2 are fixedly installed on both sides of the top surface of the operating table 1, ultrasonic welders 3 are slidably installed at the bottom ends of the two U-shaped plates 2, and a welding head is arranged in the middle of the side where the two ultrasonic welders 3 are close to each other;

[0031] Vertical ring frames 4 are fixedly installed on both sides of the top surface of the operating table 1. The two vertical ring frames 4 are located on the side where the two U-shaped plates 2 are away from each other. Round rods 7 are rotatably installed on the inner walls of the two vertical ring frames 4. Spiral grooves are opened on both sides of the outer wall of the round rod 7. The rotation directions of the two spiral grooves of the round rod 7 are set to be opposite. Triangular rings 8 are rotatably installed on both sides of the outer wall of the round rod 7. The inner walls of the two triangular rings 8 are meshed with the inner walls of the two spiral grooves of the round rod 7. The bottom surfaces of the two triangular rings 8 are fixedly connected to the top surface of the ultrasonic welder 3. A driving module 9 is fixedly installed on the left side of the operating table 1. The driving module 9 includes a supporting frame and a servo motor. The supporting frame is fixed to the left side of the bottom surface of the operating table 1, and a servo motor is fixedly installed on the top surface of the supporting frame. The right side of the servo motor shaft of the driving module 9 is fixedly connected to the left side of the round rod 7. An I-shaped column 10 is fixed in the middle of the outer wall of the round rod 7, and a belt 11 is fixed on the top of the inner wall of the I-shaped column 10. A base 12 is fixedly installed in the middle of the surface, and two slide grooves are provided on the top surface of the base 12. A pulley 13 is fixed in the middle of the back of the base 12. The inner wall of the pulley 13 is slidably connected to the top surface of the belt 11. A U-shaped frame 14 is slidably installed on the inner walls of the two slide grooves of the base 12. The back of the U-shaped frame 14 is fixedly connected to the front of the belt 11. A semi-arc block 15 is fixed at the bottom end of the U-shaped frame 14. Semicircular groove blocks 16 are fixed on the left and right sides of the semi-arc block 15. The belt 11 is located above the base 12. A groove is provided on the side where the two semicircular groove blocks 16 are close to each other, and the side where the two semicircular groove blocks 16 are away from each other is on the movement trajectory of the two ultrasonic welders 3. The positive and negative electrodes of the cylindrical lithium battery can be welded to the collector plate at the same time, so that the cylindrical lithium battery does not need to adjust the position for two weldings, and avoids the welding mechanism. When welding, the equipment needs to adjust the position of the positive and negative electrodes of the cylindrical lithium battery for two weldings, which makes the welding complicated;

[0032] A reset assembly is provided in the middle of the front side of the base 12, and the reset assembly includes a rectangular plate 17, which is fixed in the middle of the front side of the base 12, and a cylinder 18 is fixedly installed in the middle of the top side of the rectangular plate 17, and a slide bar 19 is slidably installed on the inner wall of the cylinder 18, and a spring is provided between the front side of the slide bar 19 and the back side of the inner wall of the cylinder 18, and the back side of the slide bar 19 is fixedly connected to the front side of the U-shaped frame 14, and the spring in the cylinder 18 pulls the slide bar 19 to move forward, and the slide bar 19 pulls the U-shaped frame 14 to move forward, and the U-shaped frame 14 drives the cylindrical lithium battery in the semi-arc block 15 to move forward, so that the cylindrical lithium battery can quickly return to the initial position after welding is completed, so as to avoid the cylindrical lithium battery staying in the equipment when the welding mechanism completes welding, causing inconvenience in equipment discharge.

[0033] When in use, the operating table 1 supports the U-shaped plate 2, and the U-shaped plate 2 supports the ultrasonic welder 3. Since it is necessary to adjust the position of the positive and negative poles of the cylindrical lithium battery to weld the current collector plate, it is easy to cause cumbersome welding of the cylindrical lithium battery collector plate. At this time, the operating table 1 supports the base 12, and the base 12 supports the U-shaped frame 14. The cylindrical lithium battery is placed in the semi-arc block 15 on the U-shaped frame 14, and the current collector plate is placed in the groove of the semi-circular groove block 16. The driving module 9 on the operating table 1 is started, and the servo motor shaft in the driving module 9 starts to reverse. The servo motor shaft drives the round rod 7 to reverse, and the round rod 7 is reversed in the vertical ring frame 4. At the same time, the round rod 7 drives the triangular ring 8 to reverse. The triangular ring 8 is restricted by the ultrasonic welder 3, and the triangular ring 8 moves toward the middle on the spiral groove of the round rod 7. The ultrasonic welder 3 slides toward the middle in the U-shaped plate 2. At the same time, the round rod 7 drives the I-shaped column 10 is reversed, the I-shaped column 10 reverses and rolls the belt 11, the belt 11 slides upward on the pulley 13, the belt 11 pulls the U-shaped frame 14 backward, the U-shaped frame 14 slides backward in the slide groove of the base 12, the U-shaped frame 14 drives the cylindrical lithium battery in the semi-arc block 15 to move backward, the semi-arc block 15 drives the current collecting plate in the semi-circular groove block 16 to move backward, when the current collecting plate moves to the middle of the welding head of the ultrasonic welder 3, the ultrasonic welder 3 is started, and the welding head of the ultrasonic welder 3 welds the cylindrical lithium battery and the current collecting plate, so that the positive and negative electrodes of the cylindrical lithium battery can be welded to the current collecting plate at the same time, so that the cylindrical lithium battery does not need to adjust the position for two weldings, and prevents the cylindrical lithium battery from needing to adjust the position for two weldings when welding the current collecting plate, thereby avoiding the problem of cumbersome welding caused by the welding mechanism needing to adjust the position of the positive and negative electrodes of the cylindrical lithium battery for two weldings during welding.

[0034] When the U-shaped frame 14 slides backward in the slide groove of the base 12, the U-shaped frame 14 drives the slide bar 19 to move backward. At the same time, the operating table 1 supports the rectangular plate 17, the rectangular plate 17 supports the cylinder 18, and the slide bar 19 moves backward in the cylinder 18. The spring in the cylinder 18 is pulled up by the slide bar 19. When the cylindrical lithium battery is welded, the servo motor shaft in the drive module 9 starts to rotate forward and reset. Under the action of the spring force of the cylinder 18, the spring in the cylinder 18 pulls the slide bar 19 to move forward, and the slide bar 19 pulls the U-shaped frame 14 forward. The U-shaped frame 14 drives the cylindrical lithium battery in the semi-arc block 15 to move forward, so that the cylindrical lithium battery can quickly return to the initial position after welding is completed, preventing the cylindrical lithium battery from staying in the equipment after welding is completed, thereby avoiding the problem that the cylindrical lithium battery stays in the equipment when the welding mechanism completes welding, causing inconvenience in equipment discharging.

[0035] See also Figure 1-Figure 8On the basis of the above embodiment, in another embodiment of the present invention, a positioning device 5 is provided on both sides of the front of the U-shaped frame 14, and the positioning device 5 includes an L-shaped plate 51, a stop plate 52, a thin column 53 and a round block 54. The L-shaped plate 51 is fixed on both sides of the front of the U-shaped frame 14, and a strip groove is provided in the middle of one side of the two L-shaped plates 51 away from each other. Two welding heads of ultrasonic welders 3 are provided inside the strip grooves of the two L-shaped plates 51, the stop plate 52 is fixed on the front of the two L-shaped plates 51, and the thin column 53 is fixed on the two L-shaped plates 51. On the close side, two circular blocks 54 are fixed on one end of a number of thin columns 53 away from the two L-shaped plates 51, the two U-shaped plates 2 are on the movement trajectory of the two abutment plates 52, the two circular blocks 54 are located on the side where the two semicircular groove blocks 16 are away from each other, the welding holes of the two circular blocks 54 are aligned with the inner walls of the two semicircular groove blocks 16, the circular blocks 54 limit the welding head of the ultrasonic welder 3, so that the welding head of the ultrasonic welder 3 will not shift during welding, avoiding the welding head shift in the welding mechanism causing poor welding effect of the cylindrical lithium-ion battery collector.

[0036] The positioning device 5 also includes a connecting rod 55, a roller 56 and a concave guide rail 57. The connecting rod 55 is fixed in the middle of the back of the two L-shaped plates 51. The roller 56 is rotatably installed at the bottom of the side where the two connecting rods 55 are close to each other. The concave guide rail 57 is fixed on both sides of the top surface of the operating table 1. The bottom end of the inner side of the concave guide rail 57 is located below the two rollers 56. When the L-shaped plate 51 moves backward, the roller 56 on the connecting rod 55 supports the L-shaped plate 51, allowing the L-shaped plate 51 to move backward stably, reducing the jitter generated when the L-shaped plate 51 moves, and avoiding the jitter in the welding mechanism during welding, which causes poor equipment operation.

[0037] An anti-deviating device 6 is provided in the middle of the top surface of the positioning device 5, and the anti-deviating device 6 includes a circular shaft 61, a pressure plate 62, a short column 63, an arc-shaped elastic strip 64, a U-shaped rod 65 and a baffle 66. The circular shaft 61 is fixed in the middle of the top surface of the two round-shaped blocks 54, the pressure plate 62 is rotatably mounted on the outer wall of the two circular shafts 61, the short column 63 is fixed on the top surface of the two round-shaped blocks 54, and a groove is provided on the side where the two short columns 63 are close to each other. The arc-shaped elastic strip 64 is embedded in the middle of the inner wall of the groove of the two short columns 63, and the two arc-shaped elastic strips 64 are away from the two short columns 63. The ends are fixed on the front of the two pressure plates 62, the U-shaped rods 65 are fixed on both sides of the back of the base 12, the baffles 66 are fixed on the front of the two U-shaped rods 65, the top surfaces of the two pressure plates 62 are in an eight-shaped shape, two short columns 63 are arranged on the front of the two pressure plates 62, the baffles 66 are located above the belt 11, and the baffles 66 are on the movement trajectory of the two pressure plates 62. The pressure plates 62 are above the cylindrical lithium batteries. The pressure plates 62 limit the cylindrical lithium batteries to the semi-arc blocks 15 to avoid the poor welding effect caused by the displacement of the cylindrical lithium-ion batteries during welding by the welding mechanism.

[0038] The anti-deviation device 6 also includes a U-shaped frame 67, an arc-shaped spring sheet 68 and a rubber block 69. The U-shaped frame 67 is fixed to the bottom surfaces of the two pressure plates 62, the arc-shaped spring sheet 68 is fixed to the inner walls of the two U-shaped frames 67, and the rubber block 69 is slidably installed on the inner walls of the two U-shaped frames 67. The two rubber blocks 69 are located below the two arc-shaped spring sheets 68. Under the elastic force of the arc-shaped spring sheets 68, the rubber block 69 rests on top of the cylindrical lithium-ion battery to prevent the welding mechanism from scratching the cylindrical lithium-ion battery casing and causing damage to the cylindrical lithium-ion battery casing when welding.

[0039] When the U-shaped frame 14 slides backward in the slide groove of the base 12, the U-shaped frame 14 drives the L-shaped plate 51 to move backward, and the L-shaped plate 51 drives the support plate 52 to move backward. At the same time, the L-shaped plate 51 drives the thin column 53 to move backward, and the thin column 53 drives the circular block 54 to move backward. In the process of the support plate 52 moving backward, the support plate 52 contacts the U-shaped plate 2, and the U-shaped plate 2 restricts the support plate 52 from continuing to move backward. At the same time, the welding head of the ultrasonic welder 3 slides into the circular block 54, so that the circular block 54 limits the welding head of the ultrasonic welder 3, so that the welding head of the ultrasonic welder 3 will not shift during welding, thereby preventing the welding head position of the ultrasonic welder 3 in the equipment from shifting, thereby avoiding the problem of poor welding effect of the cylindrical lithium-ion battery collector caused by the welding head shift in the welding mechanism.

[0040] While the U-shaped frame 14 drives the L-shaped plate 51 to move backward, the L-shaped plate 51 drives the connecting rod 55 to move backward, the connecting rod 55 drives the roller 56 to move backward, and the roller 56 moves backward in the concave guide rail 57. Under the action of friction, the roller 56 rolls backward in the concave guide rail 57, and the concave guide rail 57 limits the roller 56, so that when the L-shaped plate 51 moves backward, the roller 56 on the connecting rod 55 supports the L-shaped plate 51, allowing the L-shaped plate 51 to move backward stably, reducing the jitter generated when the L-shaped plate 51 moves, thereby avoiding the problem of poor equipment operation caused by jitter in the welding mechanism during welding.

[0041] When the thin column 53 drives the circular block 54 to move backward, the circular block 54 drives the circular shaft 61 to move backward, the circular shaft 61 drives the pressure plate 62 to move backward, the circular block 54 drives the short column 63 to move backward, and the short column 63 drives the arc spring strip 64 to move backward. At the same time, the base 12 supports the U-shaped rod 65, and the U-shaped rod 65 supports the baffle 66. In the process of the pressure plate 62 moving backward, the pressure plate 62 contacts the baffle 66. Under the action of the extrusion force, the pressure plate 62 rotates forward on the circular shaft 61, and the arc spring strip 64 on the pressure plate 62 is deformed, so that when the equipment is welding, the pressure plate 62 is above the cylindrical lithium battery. The pressure plate 62 restricts the cylindrical lithium battery to the semi-arc block 15 to prevent the cylindrical lithium battery in the equipment from shifting during welding, thereby avoiding the problem of poor welding effect caused by the position shift of the cylindrical lithium-ion battery when the welding mechanism is welding.

[0042] When the pressing plate 62 rotates forward on the circular shaft 61, the pressing plate 62 drives the U-shaped frame 67 to rotate forward, the U-shaped frame 67 drives the arc spring sheet 68 to rotate, and the U-shaped frame 67 drives the rubber block 69 to rotate forward, so that the rubber block 69 contacts the cylindrical lithium-ion battery in the semi-arc block 15 during the forward rotation. Under the elastic force of the arc spring sheet 68, the rubber block 69 is against the top of the cylindrical lithium-ion battery to prevent the equipment parts from scratching the cylindrical lithium-ion battery shell when the cylindrical lithium-ion battery is limited, thereby avoiding the problem of the cylindrical lithium-ion battery shell being damaged by the equipment parts when the welding mechanism is welding.

[0043] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A welding mechanism for positive and negative collector plates of a cylindrical lithium battery, comprising an operating table (1), U-shaped plates (2) being fixedly mounted on both sides of the top surface of the operating table (1), and ultrasonic welders (3) being slidably mounted on the bottom ends of the two U-shaped plates (2), characterized in that: Vertical ring frames (4) are fixedly installed on both sides of the top surface of the operating table (1), and the two vertical ring frames (4) are located on the side of the two U-shaped plates (2) that are away from each other. Round rods (7) are rotatably installed on the inner walls of the two vertical ring frames (4), and spiral grooves are opened on both sides of the outer wall of the round rod (7). The two spiral grooves of the round rod (7) are arranged to rotate in opposite directions. Triangular rings (8) are rotatably installed on both sides of the outer wall of the round rod (7), and the inner walls of the two triangular rings (8) are meshed with the inner walls of the two spiral grooves of the round rod (7). The bottom surfaces of the two triangular rings (8) are fixedly connected to the top surface of the ultrasonic welder (3). A driving module (9) is fixedly installed on the left side of the operating table (1), and the right side of the rotating shaft of the driving module (9) is fixedly connected to the left side of the round rod (7). An I-shaped column (10) is fixed in the middle of the outer wall of the round rod (7), a belt (11) is fixed on the top of the inner wall of the I-shaped column (10), a base (12) is fixedly installed in the middle of the top surface of the operating table (1), two slide grooves are provided on the top surface of the base (12), a pulley (13) is fixed in the middle of the back of the base (12), the inner wall of the pulley (13) is slidably connected to the top surface of the belt (11), a U-shaped frame (14) is slidably installed on the inner walls of the two slide grooves of the base (12), the back of the U-shaped frame (14) is fixedly connected to the front of the belt (11), a semi-arc block (15) is fixed at the bottom end of the U-shaped frame (14), and semicircular groove blocks (16) are fixed on the left and right sides of the semi-arc block (15), and a reset component is provided in the middle of the front of the base (12); The reset assembly comprises a rectangular plate (17), the rectangular plate (17) being fixed in the middle of the front face of the base (12), a cylinder (18) being fixedly mounted in the middle of the top face of the rectangular plate (17), a slide rod (19) being slidably mounted on the inner wall of the cylinder (18), a spring being arranged between the front face of the slide rod (19) and the back face of the inner wall of the cylinder (18), and the back face of the slide rod (19) being fixedly connected to the front face of the U-shaped frame (14); Positioning devices (5) are provided on both sides of the front surface of the U-shaped frame (14), and an anti-deviating device (6) is provided in the middle of the top surface of the positioning device (5); A welding head is arranged in the middle of the side where the two ultrasonic welders (3) are close to each other, the belt (11) is located above the base (12), a groove is arranged on the side where the two semicircular groove blocks (16) are close to each other, and the side where the two semicircular groove blocks (16) are far away from each other is located on the movement trajectory of the two ultrasonic welders (3); The positioning device (5) comprises an L-shaped plate (51), a stop plate (52), a thin column (53) and a circular block (54); the L-shaped plate (51) is fixed on both sides of the front of the U-shaped frame (14); a strip groove is provided in the middle of the two L-shaped plates (51) on the side away from each other; two welding heads of an ultrasonic welder (3) are provided inside the strip grooves of the two L-shaped plates (51); the stop plate (52) is fixed on the front of the two L-shaped plates (51); the thin column (53) is fixed on the side of the two L-shaped plates (51) close to each other; and the two circular blocks (54) are fixed on one end of the plurality of thin columns (53) away from the two L-shaped plates (51); The two U-shaped plates (2) are located on the movement tracks of the two abutment plates (52), the two round-shaped blocks (54) are located on the side of the two semicircular groove blocks (16) that are away from each other, and the welding holes of the two round-shaped blocks (54) are aligned with the inner walls of the two semicircular groove blocks (16); The positioning device (5) further comprises a connecting rod (55), a roller (56) and a concave guide rail (57), wherein the connecting rod (55) is fixed in the middle of the back of the two L-shaped plates (51), the roller (56) is rotatably mounted on the bottom of one side of the two connecting rods (55) close to each other, and the concave guide rail (57) is fixed on both sides of the top surface of the operating table (1), and the inner bottom end of the concave guide rail (57) is located below the two rollers (56).

2. The welding mechanism for positive and negative current collectors of a cylindrical lithium battery according to claim 1, characterized in that: The anti-deviating device (6) comprises a circular shaft (61), a pressure plate (62), a short column (63), an arc-shaped elastic strip (64), a U-shaped rod (65) and a baffle (66); the circular shaft (61) is fixed in the middle of the top surfaces of the two circular blocks (54); the pressure plate (62) is rotatably mounted on the outer walls of the two circular shafts (61); the short column (63) is fixed on the top surfaces of the two circular blocks (54); a groove is provided on the side of the two short columns (63) close to each other; the arc-shaped elastic strip (64) is embedded in the middle of the inner wall of the groove of the two short columns (63); one end of the two arc-shaped elastic strips (64) away from the two short columns (63) is fixed on the front of the two pressure plates (62); the U-shaped rod (65) is fixed on both sides of the back of the base (12); and the baffle (66) is fixed on the front of the two U-shaped rods (65).

3. The welding mechanism for the positive and negative current collectors of a cylindrical lithium battery according to claim 2, characterized in that: The top surfaces of the two pressing plates (62) are in an eight-shaped shape, the two short columns (63) are arranged on the front sides of the two pressing plates (62), the baffle plate (66) is located above the belt (11), and the baffle plate (66) is located on the movement trajectory of the two pressing plates (62).

4. The welding mechanism for positive and negative current collectors of a cylindrical lithium battery according to claim 3 is characterized in that: The anti-deviating device (6) further comprises a U-shaped frame (67), an arc-shaped spring sheet (68) and a rubber block (69), wherein the U-shaped frame (67) is fixed to the bottom surfaces of the two pressure plates (62), the arc-shaped spring sheet (68) is fixed to the inner walls of the two U-shaped frames (67), and the rubber block (69) is slidably mounted on the inner walls of the two U-shaped frames (67), and the two rubber blocks (69) are located below the two arc-shaped spring sheets (68).

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