A lithium sub-battery sectional cover assembly press

Abstract

The utility model provides a kind of lithium sub battery sectional type cover group compression bonding machine, comprising: conveyor, setting is used to carry out the conveying of battery shell with top film;Pushing device, it is set in the conveying path position of conveyor, including with the first moving block and the second moving block of battery shell moving track perpendicular, first moving block and the second moving block between being equipped with the clearance for facilitating battery shell to pass, battery shell can be placed in the clearance;The utility model can position top film before cover group compression bonding by setting the compression ring that can press and limit top film, prevent its deformation problems such as warping or bulging in compression bonding process, to effectively avoid positive pole particle exudation and contact with battery shell, reduce short-circuit risk;In addition, by setting the magnetic attraction piece with magnetic attraction function in punch end portion, cover group can be realized adsorption, film penetration and compression integrated operation, improve compression precision and reliability.

Description

Technical Field

[0001] This utility model belongs to the field of lithium-ion battery production technology, specifically relating to a segmented cover assembly pressing machine for lithium-ion batteries. Background Technology

[0002] Lithium-thionyl chloride (LTC) batteries are high-energy-density, high-voltage-platform, and low-self-discharge-rate primary batteries widely used in long-term power supply applications such as smart meters, oil well logging, national defense, rail transportation, and deep-sea exploration. Because these batteries have extremely high requirements for sealing and internal structural stability, every step in the packaging process directly affects battery performance, safety, and lifespan, especially the assembly and pressing process of the cover assembly. Specifically, during the assembly process of LTC batteries, a bottom film, a side film, and a top film are typically laid sequentially inside the battery casing to cover the positive electrode active particles and isolate them from direct contact with the metal casing. The bottom film is laid at the bottom of the battery casing to prevent contact between the bottom metal casing and the positive electrode; the side film is attached to the inner wall of the casing to form a lateral insulating layer; and the top film covers the top of the positive electrode particles, serving as a sealing layer on the upper surface and isolating the electrode structure. It is a crucial barrier to prevent short circuits caused by puncture of the cover assembly.

[0003] However, the existing technology has flaws in the installation process of the battery casing and cover assembly. Specifically, in the previous process, after the top film is cut, it is placed inside the battery casing near the top of the casing, but no limiting or fixing measures are set. Due to the lack of effective constraints, during the subsequent pressing of the cover assembly (which typically includes a cover plate, a core rod located in the center of the cover plate, and a current collector on it), the punch or other pressing structure is prone to abnormal deformation such as edge lifting, bulging, rolling, and misalignment of the top film during downward pressure. The top film should cover the positive electrode particles and the battery casing to prevent the positive electrode material from contacting the casing and causing a short circuit; however, when the top film is squeezed and deformed or bulges during the pressing process, some positive electrode particles will pass through the top film and fall into the gap between the battery casing and the separator, resulting in direct contact between the positive electrode and the casing. In severe cases, this can cause internal short circuits, leakage, or even thermal runaway, greatly reducing battery safety and assembly yield. Utility Model Content

[0004] This invention provides a segmented cover assembly pressing machine for lithium-ion batteries, which solves the problem mentioned in the background art that the existing top film is prone to deformation during the pressing process, leading to leakage of positive electrode particles and causing short circuits.

[0005] The technical solution adopted in this utility model is: a segmented cover assembly pressing machine for lithium-ion batteries, comprising: A conveyor, configured to transport battery casings with top membranes; The pushing device is set at the conveying path of the conveyor and includes a first moving block and a second moving block perpendicular to the moving trajectory of the battery casing. A gap is provided between the first moving block and the second moving block to facilitate the passage of the battery casing. The battery casing can be placed in the gap and pushed to the working area by the first moving block. After the work in the working area is completed, the battery casing is pushed back onto the conveyor by the second moving block. The pressure ring is movable in both the vertical and horizontal directions, and has an opening on one side. The pressure ring is configured to be placed inside the battery housing and to limit the top film. The lifting and lowering pressing assembly includes a punch that can move up and down. A magnetic suction device is provided below the punch. The magnetic suction device is used to attract the cover assembly and insert the cover assembly into the battery housing during the downward movement of the punch. After breaking through the top film, the cover assembly is pressed into the battery housing.

[0006] It also includes a base plate, on which a conveyor is mounted. The conveyor includes a circulating conveyor belt on which the battery casing is placed and transported horizontally.

[0007] The feeding device includes a fixed plate fixed in the middle of the conveyor. The fixed plate is horizontally arranged and has six fixed blocks installed on its upper surface. The six fixed blocks are divided into two groups of three, which are evenly arranged on both sides of the conveying track. The fixed blocks in each group are arranged at equal intervals along the conveying direction and are spaced apart from each other. A feeding channel is formed between the two groups of fixed blocks, and the feeding channel coincides with the conveying path of the battery casing.

[0008] The first and second movable blocks are respectively disposed in the gap between two fixed blocks near the front of the feeding channel, and a third movable block is also included, which is disposed in the gap between two fixed blocks near the rear of the feeding channel.

[0009] The pushing device also includes a pushing cylinder mounted on a fixed plate. The telescopic rod of the pushing cylinder is connected to a movable seat, and a movable plate is connected to the movable seat. The movable plate is fixedly connected to a first movable block, a second movable block, and a third movable block, and is configured such that when the movable plate moves, it can simultaneously drive the first movable block, the second movable block, and the third movable block to move. In the first working state, the third movable block is located at the feeding channel, and the gap between the first movable block and the second movable block coincides with the feeding channel. In the second working state, the first movable block and the second movable block move horizontally, so that the first movable block is located at the feeding channel, and the third movable block moves away from the feeding channel.

[0010] It also includes a clamping cylinder installed on one of the fixed blocks. The telescopic rod of the clamping cylinder can pass through the fixed block. The area between the fixed block and the adjacent fixed blocks in the same group is the working area. The battery casing can be pushed to the working area and clamped by the clamping cylinder.

[0011] A first optical axis is fixed on the upper surface of the base plate. An intermediate plate is installed on the top of the first optical axis. A limit cylinder is installed above the intermediate plate. The lower end of the limit cylinder is connected to a second lifting plate that is slidably connected to the first optical axis. A clearance cylinder is installed below the second lifting plate. The working path of the clearance cylinder is arranged in the horizontal direction. A connecting frame is connected to the end of the telescopic rod of the clearance cylinder. A pressure ring is installed on the connecting frame.

[0012] A second optical axis is installed above the intermediate plate, and a top plate is installed on the top of the second optical axis. A pressing cylinder is installed on the surface of the top plate. A first lifting plate is slidably connected to the second optical axis. A pre-pressing cylinder is installed on the surface of the first lifting plate. The pre-pressing cylinder is connected to the telescopic rod of the pressing cylinder above, and a pressing rod is connected below the telescopic rod of the pre-pressing cylinder. A punch is installed at the lower end of the pressing rod. When the pre-pressing cylinder is working, it can drive the pressing rod and the punch to move down initially. Then, the pressing cylinder drives the pre-pressing cylinder, the first lifting plate, the pressing rod, and the punch to move down simultaneously, thereby pressing the cover assembly onto the battery casing.

[0013] It also includes a conveying device for conveying the cover assembly. The conveying device includes a feeding block that can move horizontally. The feeding block has an inlet on its side and an outlet on its end face. The outlet and the inlet are connected to each other, and the top of the feeding block at the point where the two are connected has a groove. The cover assembly can enter the feeding block through the inlet, and after being horizontally conveyed to a designated position, it can be discharged from the outlet.

[0014] The beneficial effects of this utility model are as follows: This invention, by setting a pressure ring that can press and limit the top film, can position the top film before the cover assembly is pressed together, preventing deformation problems such as warping or bulging during the pressing process. This effectively avoids the leakage of positive electrode particles and their contact with the battery casing, reducing the risk of short circuit. In addition, by setting a magnetic suction component with magnetic attraction function at the end of the punch, the adsorption, film insertion and pressing of the cover assembly can be integrated into one operation, improving the pressing accuracy and reliability. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is an installation structure diagram of the conveyor and pushing device of this utility model; Figure 3 This is a plan view of the feeding device of this utility model in the first working state; Figure 4 This is a plan view of the feeding device of this utility model in the second working state; Figure 5 This is a front view of the overall structure of this utility model in the concealed conveyor state; Figure 6 The mounting structure of the pressure ring of this utility model is three-dimensional. Figure 1 ; Figure 7 The mounting structure of the pressure ring of this utility model is three-dimensional. Figure 2 ; Figure 8 This is a cross-sectional view of the connection structure of the punch part of this utility model; Figure 9 This is a three-dimensional structural diagram of the cover assembly conveying device of this utility model; Figure 10 This is a perspective view of the feeding block of this utility model; Figure 11 A schematic diagram illustrating the conveying of the cover assembly of this utility model; Figure 12 This is a schematic diagram of the pressing of the cover assembly and the battery casing of this utility model.

[0016] in: 1. Base plate; 2. Conveyor; 201. Conveyor belt; 3. Fixed plate; 4. Pushing cylinder; 5. Moving plate; 6. First fixed block; 7. Second fixed block; 8. Third fixed block; 9. Fourth fixed block; 901. Arc surface; 10. Fifth fixed block; 11. Sixth fixed block; 12. First moving block; 13. Second moving block; 14. Third moving block; 15. Moving seat; 16. Clamping cylinder; 17. Feeding channel; 18. First optical axis; 19. Punch; 20. Intermediate plate; 2 1. Pressure rod; 22. Connector; 23. Second optical axis; 24. Pre-pressure cylinder; 25. Pressing cylinder; 26. Top plate; 27. First lifting plate; 28. Limiting cylinder; 29. ​​Second lifting plate; 30. Connecting frame; 31. Pressure ring; 32. Displacement cylinder; 33. Magnetic suction component; 34. Feeding block; 3401. Feed inlet; 3402. Discharge outlet; 3403. Groove; 35. Vertical plate; 36. Slide groove; 37. Cover plate; 38. Core rod; 39. Current collector; 40. Battery casing. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] As shown in the figure, a segmented cover assembly pressing machine for lithium-ion batteries includes a base plate 1, which serves as the foundation for the equipment and is used for placement or installation on an automated production line; it also includes... The conveyor 2 is configured to transport the battery casing 40 with the top film. The conveyor 2 is installed above the base plate 1. The conveyor 2 includes a circulating conveyor belt 201. The battery casing 40 is placed on the conveyor belt 201 and transported in a horizontal direction. Specifically, the conveyor 2 is driven by a motor to achieve feeding. Its specific structure and principle are conventional settings in the prior art and will not be described in detail here. The pushing device is set at the conveying path of the conveyor 2 and includes a first moving block 12 and a second moving block 13 perpendicular to the moving trajectory of the battery housing 40. A gap is provided between the first moving block 12 and the second moving block 13 to facilitate the passage of the battery housing 40. The battery housing 40 can be placed in the gap and pushed to the working area by the first moving block 12. After the work in the working area is completed, the battery housing 40 is pushed back onto the conveyor 2 by the second moving block 13. The pressure ring 31 is movable in both the vertical and horizontal directions. The pressure ring 31 has an opening on one side and is configured to be placed inside the battery housing 40 and to limit the top film. The lifting and lowering pressing assembly includes a punch 19 that can move up and down. A magnetic suction component 33 is provided below the punch 19. The magnetic suction component 33 is used to attract the cover assembly. The magnetic suction component 33 is a magnetic ring. During the downward movement of the punch 19, the cover assembly is inserted into the battery housing 40 and after penetrating the top film, the pressing with the battery housing 40 is completed.

[0019] Specifically, the feeding device includes a fixed plate 3 fixed in the middle of the conveyor 2. The fixed plate 3 is horizontally arranged and has six fixed blocks installed on its upper surface. The six fixed blocks are divided into two groups of three, which are evenly arranged on both sides of the conveying track. The fixed blocks in each group are arranged at equal intervals along the conveying direction and are spaced apart from each other. A feeding channel 17 is formed between the two groups of fixed blocks. The feeding channel 17 coincides with the conveying path of the battery casing 40.

[0020] In this example, the six fixing blocks are designated as first fixing block 6, second fixing block 7, third fixing block 8, fourth fixing block 9, fifth fixing block 10, and sixth fixing block 11. First fixing block 6, third fixing block 8, and fifth fixing block 10 form one group, arranged sequentially and at intervals along the conveying direction of conveyor belt 201. Second fixing block 7, fourth fixing block 9, and fifth fixing block 10 form another group, also arranged sequentially and at intervals along the conveying direction of conveyor belt 201. A feeding channel 17 connects the two groups, aligning with the conveying path of conveyor belt 201. During operation, conveyor belt 201 can pass over the upper surface of fixing plate 3, thus conveying the battery casing 40 onto fixing plate 3. First moving block 12 and second moving block 13 are respectively positioned in the gap between two fixing blocks near the front of the feeding channel 17. A third moving block 14 is also included, positioned in the gap between two fixing blocks near the rear of the feeding channel 17.

[0021] The pushing device also includes a pushing cylinder 4 mounted on a fixed plate 3. The telescopic rod of the pushing cylinder 4 is connected to a movable seat 15. A movable plate 5 is connected to the movable seat 15. The movable plate 5 is fixedly connected to a first movable block 12, a second movable block 13, and a third movable block 14. It is configured that when the movable plate 5 moves, it can simultaneously drive the first movable block 12, the second movable block 13, and the third movable block 14 to move. In the first working state, the third movable block 14 is located at the feeding channel 17, and the gap between the first movable block 12 and the second movable block 13 coincides with the feeding channel 17. In the second working state, the first movable block 12 and the second movable block 13 move horizontally, so that the first movable block 12 is located at the feeding channel 17, and the third movable block 14 moves away from the position of the feeding channel 17.

[0022] More specifically, there is a gap between the first fixing block 6 and the third fixing block 8. Similarly, there is also a gap between the corresponding second fixing block 7 and the fourth fixing block 9. The two gaps are connected, and the first moving block 12 and the second moving block 13 are arranged in the channel connected by the two gaps. There is a gap between the third fixing block 8 and the fifth fixing block 10. Similarly, there is also a gap between the corresponding fourth fixing block 9 and the sixth fixing block 11. The two gaps are connected, and the third moving block 14 is located in the channel connected by the two gaps.

[0023] In operation, the feeding device uses a conveyor belt 201 to sequentially place and transport the battery casings 40 forward. When the casings reach the feeding device, the third moving block 14 first blocks them. At this point, there are three battery casings 40 above the fixed plate 3: the foremost battery casing 40 closest to the third moving block 14 (also between the third fixed block 8 and the fourth fixed block 9), the middle battery casing 40 between the first moving block 12 and the second moving block 13, and the rear battery casing 40 between the first fixed block 6 and the second fixed block 7. Then, the feeding cylinder 4 moves, causing the moving base 15 and the moving plate 5 to move backward, resulting in the first moving block 12, the second moving block 13, and the third moving block 14 moving backward simultaneously. This moves the middle battery casing 40 between the first moving block 12 and the second moving block 13 to the working area (located between the second fixed block 8 and the fourth fixed block 9). (between 7 and the fourth fixed block 9), at the same time, the foremost battery housing 40, which was originally blocked by the third moving block 14, is conveyed forward by the conveyor belt 201. The rear battery housing 40, which is between the first fixed block 6 and the second fixed block 7, is blocked by the first moving block 12. At this time, the middle battery housing 40, which moves to the working area, is pressed and assembled. After the pressing is completed, the pusher cylinder 4 is activated, which drives the three moving blocks to return to their initial state, so that the middle battery housing 40 returns to the conveyor belt 201 and continues to be conveyed until it contacts the reset third moving block 14 and is blocked. The rear battery housing 40, which was originally between the first fixed block 6 and the second fixed block 7, moves to the space between the first moving block 12 and the second moving block 13 and waits to be pushed to the working area. The battery housing 40 behind it fills the gap between the first fixed block 6 and the second fixed block 7. Then the above pushing work is repeated to achieve repeated pushing work.

[0024] It also includes a clamping cylinder 16 mounted on one of the fixed blocks. The telescopic rod of the clamping cylinder 16 can pass through the fixed block. The area between the fixed block and the adjacent fixed blocks in the same group is the working area. The battery casing 40 can be pushed into the working area and clamped by the clamping cylinder 16. Specifically, in this example, the working area is the position between the second fixed block 7 and the fourth fixed block 9. The clamping cylinder 16 is mounted on the second fixed block 7. When the battery casing 40 is pushed into the working area, the telescopic rod of the clamping cylinder 16 extends to clamp the battery casing 40. In addition, in this example, in order to improve the clamping effect of the battery casing 40, an arc surface 901 is provided on the side of the fourth fixed block 9 near the battery casing 40. The curvature of the arc surface matches the outer diameter of the battery casing 40, making the battery clamping more stable. The purpose of clamping the battery casing 40 is to prevent the battery casing 40 from shifting or shaking during the pressing process.

[0025] The upper surface of the base plate 1 is fixed with a first optical axis 18. In this example, there are four first optical axes 18. A middle plate 20 is installed on the top of the first optical axis 18. A limit cylinder 28 is installed above the middle plate 20. The lower end of the limit cylinder 28 is connected to a second lifting plate 29 that is slidably connected to the first optical axis 18. A clearance cylinder 32 is installed below the second lifting plate 29. The working path of the clearance cylinder 32 is arranged in the horizontal direction. The end of the telescopic rod of the clearance cylinder 32 is connected to a connecting frame 30. A pressure ring 31 is installed on the connecting frame 30.

[0026] Specifically, a guide rail slider assembly is provided on the lower surface of the second lifting plate 29, and a connecting frame 30 is installed on the slider to allow the connecting frame 30 to move smoothly. The working process of the pressure ring 31 is as follows: when the battery casing 40 is pushed into the working area, the battery casing 40 has a top film inside. At this time, the limiting cylinder 28 moves down, which can drive the second lifting plate 29 and the connecting frame 30 and pressure ring 31 on it to move down. The pressure ring 31 presses and limits the top film so that the subsequent cover assembly can pass through the top film for pressing. Specifically, after the cover assembly passes through the top film for preliminary pre-pressing, the limiting cylinder 28 rises and the yielding cylinder 32 is activated to move the pressure ring 31 away from the working area. Then the cover assembly continues to be pressed down until the pressing work is completed. The yielding cylinder 32 is mainly set to carry the pressure ring 31 away from the working area to prevent interference during the pressing process.

[0027] A second optical axis 23 is installed above the intermediate plate 20. A top plate 26 is installed on the top of the second optical axis 23. A pressing cylinder 25 is installed on the surface of the top plate 26. A first lifting plate 27 is slidably connected to the second optical axis 23. A pre-pressing cylinder 24 is installed on the surface of the first lifting plate 27. The pre-pressing cylinder 24 is connected to the telescopic rod of the upper pressing cylinder 25. A pressing rod 21 is connected below the telescopic rod of the pre-pressing cylinder 24. The pressing rod 21 is connected to the telescopic rod of the pre-pressing cylinder 24 through a connector 22. A punch 19 is installed at the lower end of the pressing rod 21. When the pre-pressing cylinder 24 is working, it can drive the pressing rod 21 and the punch 19 to move down initially. Then, the pressing cylinder 25 drives the pre-pressing cylinder 24, the first lifting plate 27, the pressing rod 21, and the punch 19 to move down simultaneously, thereby pressing the cover assembly onto the battery casing 40.

[0028] Specifically, the pressing operation is as follows: the magnetic suction component 33 at the lower end of the punch 19 attracts the cover assembly. After the pressure ring 31 presses and limits the top film, the pre-pressing cylinder 24 starts first, driving the punch 19 to move down, thereby piercing the core rod 38 and current collector 39 on the cover assembly through the top film and inserting them into the positive electrode particles inside the battery housing 40. Then, after the pressure rod 21 moves away from the battery housing 40, the pressing cylinder 25 starts and drives the pressure rod 21 and the punch 19 to press the cover assembly further until the cover assembly is pressed onto the battery housing 40. Since the pressing force between the cover assembly and the battery housing 40 is greater than the magnetic force, the punch 19 moves up, and the pressed battery assembly is pushed back onto the conveyor belt 201, thus completing the pressing operation.

[0029] In addition to removing the pressure ring 31 from the working area, the pre-pressing cylinder 24 and the pre-pressing process described above also serve the following purposes: by controlling the slow downward movement of the punch 19 through the pre-pressing cylinder 24 to pierce the top membrane first, the severe impact on the top membrane caused by the high-intensity single pressing of the cover assembly is effectively avoided, thereby reducing the risk of the top membrane bulging, tearing or misalignment, and improving the controllability and stability of the membrane insertion process; in addition, since the core rod 38 and the current collector 39 need to be inserted into the positive electrode particle area, the pre-pressing action can achieve gradual insertion, preventing the positive electrode particles from being stirred up, causing particle overflow, membrane breakage or positional displacement when forcefully pressed in at one time, and ensuring that the internal structure of the battery cell is uniform and reliable.

[0030] The system also includes a conveying device for transporting the cover assembly. The conveying device includes a horizontally movable feeding block 34. The feeding block 34 has an inlet 3401 on its side and an outlet 3402 on its end face. The outlet 3402 communicates with the inlet 3401, and a groove 3403 is provided on the top of the feeding block 34 at the point of communication. The cover assembly can enter the feeding block 34 through the inlet 3401, be horizontally transported to a designated position, and then exit through the outlet 3402. In this example, the movement of the feeding block 34 is controlled by a cylinder, which is not shown in the figure. The structure of the cover assembly mainly includes a cover plate 37, a core rod 38 set in the center of the cover plate 37 and a collection net 39 on it. The cover assembly is arranged and conveyed in a specified order on a vibratory feeder (vibratory feeding mechanism). It first enters the feeding block 34 from the feed port 3401. Then the feeding block 34 conveys the cover assembly to the working area (specifically located directly below the punch 19). After the punch 19 moves down to adsorb the cover assembly, the feeding block 34 resets. During the reset process, the cover assembly is discharged from the discharge port 3402 of the feeding block 34, completing the feeding process of the entire cover assembly.

[0031] The structure and working principle of the vibratory feeder are conventional settings in the existing technology, and will not be elaborated on here. After the cover assembly is discharged from the vibratory feeder, it is conveyed with the cover plate 37 facing upward and the core rod 38 and the collecting net 39 facing downward. Specifically, in this example, there are two upright plates 35 on one side above the fixed plate 3. The upper part of the upright plate 35 is an inclined structure. There are two upright plates 35. There is a sliding groove 36 between the two upright plates 35 to facilitate the passage of the cover assembly. The cover assembly moves from top to bottom in the sliding groove 36 and finally moves into the feeding block 34.

[0032] This lithium-ion battery segmented cover assembly pressing machine achieves an integrated automatic assembly process through structural coordination, including precise positioning of the battery casing 40, limiting the pressing film, and segmented pressing of the cover assembly.

[0033] In actual operation, the battery casing 40 is first conveyed sequentially by the conveyor belt 201 to the top of the fixed plate 3. When the battery casing 40 enters the area where the fixed block is located, the third moving block 14 acts as a blocking force, so that the battery casing 40 is positioned sequentially in the feeding channel 17 between the two sets of fixed blocks. After the pushing cylinder 4 is started, it drives the moving seat 15 and the moving plate 5 to move backward, and the first moving block 12 and the second moving block 13 are linked to push the middle battery casing 40 into the working area between the second fixed block 7 and the fourth fixed block 9. After the battery casing 40 is positioned in the working area, the clamping cylinder 16 set on the second fixed block 7 is started. Its telescopic rod extends out and works together with the arc surface 901 set on the fourth fixed block 9 to achieve stable clamping of the battery casing 40 and prevent shaking or displacement in the subsequent pressing process.

[0034] Subsequently, the limiting cylinder 28 drives the pressure ring 31 to descend. The pressure ring 31 is inserted into the battery housing 40 and presses and limits the top film to prevent the top film from lifting, bulging or shifting during the pressing process. At this time, the cover assembly is sent by the feeding block 34 to the bottom of the punch 19 and is attracted by the magnetic suction part 33 at the lower end of the punch 19.

[0035] Next, the pre-pressing cylinder 24 is activated, causing the punch 19 and the cap assembly adsorbed at its lower end to slowly descend. The core rod 38 and the current collector 39 pass through the top film and insert into the positive electrode particles inside the battery casing 40, completing the pre-penetration and pre-positioning operation. Subsequently, the limiting cylinder 28 rises, allowing the positioning cylinder 32 to move the pressure ring 31 horizontally away from the working area to avoid interference. Then, the pressing cylinder 25 is activated, driving the pre-pressing cylinder 24, the first lifting plate 27, the pressure rod 21, and the punch 19 to continue pressing downwards, so that the cap assembly and the battery casing 40 complete a stable and uniform pressing connection. After pressing is completed, the punch 19 rises while the cap assembly remains inside the casing. The pressed battery casing 40 returns to the conveyor belt 201 under the action of the pushing cylinder 4 and continues to be conveyed backwards.

[0036] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A segmented cover assembly pressing machine for lithium-ion batteries, characterized in that, include: A conveyor, configured to transport battery casings with top membranes; The pushing device is set at the conveying path of the conveyor and includes a first moving block and a second moving block perpendicular to the moving trajectory of the battery casing. A gap is provided between the first moving block and the second moving block to facilitate the passage of the battery casing. The battery casing can be placed in the gap and pushed to the working area by the first moving block. After the work in the working area is completed, the battery casing is pushed back onto the conveyor by the second moving block. The pressure ring is movable in both the vertical and horizontal directions, and has an opening on one side. The pressure ring is configured to be placed inside the battery housing and to limit the top film. The lifting and lowering pressing assembly includes a punch that can move up and down. A magnetic suction device is provided below the punch. The magnetic suction device is used to attract the cover assembly and insert the cover assembly into the battery housing during the downward movement of the punch. After breaking through the top film, the cover assembly is pressed into the battery housing.

2. The lithium-ion battery segmented cover assembly pressing machine according to claim 1, characterized in that, It also includes a base plate, on which a conveyor is mounted. The conveyor includes a circulating conveyor belt on which the battery casing is placed and transported horizontally.

3. The lithium-ion battery segmented cover assembly pressing machine according to claim 1, characterized in that, The feeding device includes a fixed plate fixed in the middle of the conveyor. The fixed plate is arranged horizontally and has six fixed blocks installed on its upper surface. The six fixed blocks are divided into two groups of three, which are evenly arranged on both sides of the conveying track. The fixed blocks in each group are arranged at equal intervals along the conveying direction and are spaced apart from each other. A feeding channel is formed between the two groups of fixed blocks, and the feeding channel coincides with the conveying path of the battery casing.

4. A segmented cover assembly pressing machine for lithium-ion batteries according to claim 3, characterized in that, The first and second movable blocks are respectively located in the gap between two fixed blocks near the front of the feeding channel. The system also includes a third movable block, which is located in the gap between two fixed blocks near the rear of the feeding channel.

5. A segmented cover assembly pressing machine for lithium-ion batteries according to claim 4, characterized in that, The pushing device also includes a pushing cylinder mounted on a fixed plate. The telescopic rod of the pushing cylinder is connected to a movable seat, and a movable plate is connected to the movable seat. The movable plate is fixedly connected to a first movable block, a second movable block, and a third movable block, and is configured to simultaneously drive the first movable block, the second movable block, and the third movable block to move when the movable plate moves. In the first working state, the third movable block is located at the feeding channel, and the gap between the first movable block and the second movable block coincides with the feeding channel. In the second working state, the first movable block and the second movable block move horizontally, so that the first movable block is located at the feeding channel, and the third movable block moves away from the feeding channel.

6. A segmented cover assembly pressing machine for lithium-ion batteries according to claim 5, characterized in that, It also includes a clamping cylinder installed on one of the fixed blocks. The telescopic rod of the clamping cylinder can pass through the fixed block. The area between the fixed block and the adjacent fixed blocks in the same group is the working area. The battery casing can be pushed to the working area and clamped by the clamping cylinder.

7. A segmented cover assembly pressing machine for lithium-ion batteries according to claim 2, characterized in that, A first optical axis is fixed on the upper surface of the base plate. An intermediate plate is installed on the top of the first optical axis. A limit cylinder is installed above the intermediate plate. The lower end of the limit cylinder is connected to a second lifting plate that is slidably connected to the first optical axis. A clearance cylinder is installed below the second lifting plate. The working path of the clearance cylinder is arranged in the horizontal direction. A connecting frame is connected to the end of the telescopic rod of the clearance cylinder. A pressure ring is installed on the connecting frame.

8. A segmented cover assembly pressing machine for lithium-ion batteries according to claim 7, characterized in that, A second optical axis is installed above the middle plate, and a top plate is installed on the top of the second optical axis. A pressing cylinder is installed on the surface of the top plate. A first lifting plate is slidably connected to the second optical axis. A pre-pressing cylinder is installed on the surface of the first lifting plate. The pre-pressing cylinder is connected to the telescopic rod of the pressing cylinder above, and a pressure rod is connected below the telescopic rod of the pre-pressing cylinder. A punch is installed at the lower end of the pressure rod. When the pre-pressing cylinder is working, it can drive the pressure rod and the punch to move down initially. Then, the pressing cylinder drives the pre-pressing cylinder, the first lifting plate, the pressure rod, and the punch to move down simultaneously, thereby pressing the cover assembly onto the battery casing.

9. A segmented cover assembly pressing machine for lithium-ion batteries according to claim 1, characterized in that, It also includes a conveying device for conveying the cover assembly. The conveying device includes a feeding block that can move horizontally. The feeding block has an inlet on its side and an outlet on its end face. The outlet and the inlet are connected to each other, and the top of the feeding block at the point where the two are connected has a groove. The cover assembly can enter the feeding block through the inlet, and after being horizontally conveyed to a designated position, it can be discharged from the outlet.

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