Pole piece adhesive tape cutting mechanism for lithium battery production

Abstract

The utility model belongs to the technical field of lithium ion batteries, and particularly relates to a pole piece adhesive tape cutting mechanism for lithium battery production, which comprises a conveying mechanism, a cutting mechanism, a pressing mechanism, a support frame and a cutting support seat, the conveying mechanism is mounted on the support frame and used for conveying a pole piece adhesive tape, and the cutting mechanism is used for cutting the adhesive tape. The pressing mechanism is used for pressing the adhesive tape and then cutting off the adhesive tape, and the cutting supporting base is fixed to the supporting frame. The automatic adhesive cutting device can quickly cut adhesive tapes of upper and lower tabs, cut ends cannot be adhered together, continuity of automatic production of the tabs is guaranteed, the number of defective and joints is reduced, product quality and production efficiency are improved, cutting effect is good, cost is low, maintenance is less, the mechanism is simple, operation is convenient, and one blade can be used for more than one year and does not need to be replaced.

Description

Technical Field

[0001] This utility model belongs to the field of lithium-ion battery technology, specifically relating to an electrode tape cutting mechanism for lithium battery production. Background Technology

[0002] Traditional methods for cutting battery tab adhesive include scissor cutting, stamping cutting, and passive cutting via hot pressing. Taking scissor cutting as an example, in actual operation, this method is not only inefficient but also prone to occasional failure to cut the adhesive tape completely. If this occurs, during subsequent feeding, the tape will not be fully separated, causing the upper and lower tapes to stick together, hindering the smooth lateral feeding action across the conductor's upper and lower sides, thus affecting production continuity. Furthermore, after a hot pressing cycle, the scissor cutting method may pull on the tape as it advances, causing it to deform and bulge. When the next cylinder feeds the tape, it is highly likely to bump and damage the conductor, ultimately leading to equipment downtime, significantly reducing production efficiency and increasing production costs.

[0003] While stamping and cutting methods improve cutting efficiency to some extent, they also have significant drawbacks. The impact force generated during stamping is substantial, which can easily damage the electrode sheets, affecting their performance and consequently reducing the overall quality of the lithium battery. Furthermore, the manufacturing cost of stamping dies is high, requiring regular maintenance and replacement, further increasing production costs.

[0004] The hot-pressing synchronous cutting device employs a design where two cutting blades are mounted on the base plates of the upper and lower hot-pressing cylinders, moving synchronously with the upper and lower hot-pressing plates. The cutting pressure is adjusted by an ejector pin to cut the tape. In practical applications, this method involves extremely complex setup, requiring operators with extensive experience to carefully adjust the stroke of the ejector pin or cylinder bit by bit to find the appropriate cutting point. Excessive ejector pin pressure can easily break the blades; insufficient pressure will prevent the tape from cutting. Frequent adjustments not only consume significant time and manpower but also risk product quality instability and increased defect rates due to improper operation. Utility Model Content

[0005] The purpose of this utility model is to provide an electrode tape cutting mechanism for lithium battery production and an automobile, thereby solving the problems existing in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a lithium battery electrode tape cutting mechanism, comprising a conveying mechanism, a cutting mechanism, a pressing mechanism, a support frame, and a cutting support seat. The conveying mechanism is mounted on the support frame and is used to convey the electrode tape. The cutting mechanism is used to cut the tape, and the pressing mechanism is used to press the tape tightly before cutting. The cutting support seat is fixed on the support frame.

[0007] Preferably, the support frame consists of a base plate, a left upright plate, a right upright plate, a rear upright plate, and a front crossbeam. The left and right upright plates are fixed to the left and right sides of the base plate, respectively, the rear upright plate is fixed to the rear side of the base plate, and the front crossbeam is fixed at an upper position between the left and right upright plates.

[0008] Preferably, the conveying mechanism includes a motor, a conveying roller, and a pressure roller. The pressure roller and the conveying roller clamp the tape. The motor is fixed to the inner side of the left upright plate by a motor bracket. The output end of the motor passes through the left upright plate and is connected to the conveying roller located on the outer side of the left upright plate. The motor drives the conveying roller to rotate.

[0009] Preferably, the pressure roller is provided above the conveyor roller. The pressure roller is mounted on the sliding seat via a bearing. The sliding seat slides in cooperation with the guide rail vertically mounted on the left upright plate. A guide rod is connected to the top of the support seat. A spring is sleeved on the guide rod. A connecting block is fixed to the top of the left upright plate. One end of the spring contacts the bottom of the connecting block, and the other end contacts the sliding seat, so that the pressure roller always has a downward pressure.

[0010] Preferably, the top of the guide rod is connected to the piston rod of the clamping cylinder, and the clamping cylinder is fixed on the connecting block.

[0011] Preferably, the cutting mechanism includes a transverse moving cylinder, a longitudinal moving cylinder, and a cutter. The cutter is fixed to the piston rod of the longitudinal moving cylinder via a cutter connecting plate. The longitudinal cylinder is fixed to the piston rod of the transverse moving cylinder. The transverse moving cylinder is fixed to the front crossbeam. The longitudinal cylinder is used to adjust the vertical position of the cutter. The transverse moving cylinder drives the cutter to move left and right to achieve the cutting action.

[0012] Preferably, the clamping mechanism includes a clamping cylinder, a clamping frame, a clamping rubber seat, and a connecting block. The connecting block is fixed to the upper outer side of the upright plate, the clamping cylinder is fixed to one side of the connecting block, the piston rod of the clamping cylinder is fixed to the top of the clamping frame, and the clamping rubber seat is divided into two groups, which are respectively fixed to the bottom two sides of the clamping frame.

[0013] Preferably, the clamping frame has an inverted U-shaped structure.

[0014] Preferably, the cutting support is located below the clamping mechanism, the cutting support is fixed on the left upright plate, and a cutting groove is provided on the cutting support at the position corresponding to the cutter.

[0015] Preferably, the clamping adhesive base is located on both sides of the cutting groove.

[0016] The beneficial effects of this invention are as follows: Through the coordinated operation of the conveying mechanism, cutting mechanism, and clamping mechanism, the upper and lower tab tapes can be cut quickly. The lateral and longitudinal moving cylinders precisely control the cutter's movement, and the cutter quickly completes the cut after being positioned above the tape, greatly shortening the time for a single cutting operation. The clamping mechanism clamps the tape before cutting, working in conjunction with the conveying mechanism to maintain tape tension, preventing tape displacement during cutting and effectively preventing the cut ends from sticking together. This ensures the continuity of automatic tab production, reduces production stoppages caused by tape cutting problems, and significantly improves production efficiency. This mechanism can accurately cut the tape, reducing the number of defective products caused by incomplete cutting or tape adhesion. The cutting process is stable and does not cause additional damage to the electrode sheets, ensuring electrode quality and thus improving the overall quality of the lithium battery. Simultaneously, reducing the number of joints reduces the impact of poor contact at joints on battery performance, resulting in more stable and reliable lithium battery performance. Attached Figure Description

[0017] Figure 1 This is a perspective view of the present utility model;

[0018] Figure 2 This is the front view of the present invention;

[0019] Figure 3 This is a side view of the present invention;

[0020] Explanation of reference numerals in the attached drawings: 1. Conveying mechanism; 11. Motor; 12. Conveying roller; 13. Pressure roller; 14. Motor bracket; 15. Sliding seat; 16. Guide rail; 17. Guide rod; 18. Spring; 19. Connecting block; 10. Pressing cylinder; 2. Cutting mechanism; 21. Lateral movement cylinder; 22. Longitudinal movement cylinder; 23. Cutter; 24. Cutter connecting plate; 25. Cylinder connecting plate; 3. Pressing mechanism; 31. Pressing cylinder; 32. Pressing frame; 33. Pressing rubber seat; 4. Support frame; 41. Base plate; 42. Left upright plate; 43. Right upright plate; 44. Rear upright plate; 45. Front crossbeam; 5. Cutting support seat; 51. Cutting groove. Detailed Implementation

[0021] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other.

[0022] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this invention. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0023] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," "fixed connection," and "fixed connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0024] The specific embodiments of this utility model are described in detail below with reference to the accompanying drawings and preferred embodiments.

[0025] like Figures 1-3 As shown, an electrode tape cutting mechanism for lithium battery production includes a conveying mechanism 1, a cutting mechanism 2, a pressing mechanism 3, a support frame 4, and a cutting support base 5. The conveying mechanism is used to convey the electrode tape, the cutting mechanism is used to cut the tape, and the pressing mechanism is used to press the tape tightly before cutting it.

[0026] The support frame consists of a base plate 41, a left upright plate 42, a right upright plate 43, a rear upright plate 44, and a front crossbeam 45. The left and right upright plates are fixed to the left and right sides of the base plate, respectively, the rear upright plate is fixed to the rear side of the base plate, and the front crossbeam is fixed at an upper position between the left and right upright plates.

[0027] The conveying mechanism 1 includes a motor 11, a conveying roller 12, and a pressure roller 13. The motor drives the conveying roller to rotate, and the pressure roller and conveying roller clamp the tape to make the tape taut for easy cutting. The motor is fixed to the inside of the left vertical plate 42 by a motor bracket 14, and the rear side of the motor is fixed to the inside of the right vertical plate by bolts. In this way, the motor is more firmly fixed to the support frame and the operation is more stable. The output end of the motor passes through the side plate of the support frame and is connected to the conveyor roller 12 located outside the side plate of the support frame. The motor drives the conveyor roller to rotate. Furthermore, in order to give the electrode tape a certain tension for cutting, the pressure roller 13 is set on the upper part of the conveyor roller. The pressure roller is mounted on the sliding seat 15 through the bearing. The sliding seat slides with the guide rail 16 vertically set on the side of the support frame. A guide rod 17 is connected to the top of the support seat. A spring 18 is sleeved on the guide rod. A connecting block 19 is fixed on the top of the support frame. One end of the spring contacts the bottom of the connecting block and the other end contacts the sliding seat, so that the pressure roller always has a downward pressure. The electrode tape passes through the conveyor roller 12 and the pressure roller 13. Under the action of the spring, the pressure roller always presses the electrode tape downward, so that the tape is always in an open state for subsequent cutting. Furthermore, the top of the guide rod is connected to the piston rod of the clamping cylinder 10. The clamping cylinder is fixed on the connecting block. The real purpose of the clamping cylinder is to lift the pressure roller. Initially, the electrode needs to be inserted between the conveyor roller and the pressure roller. Since the pressure roller is always pressing down on the conveyor roller under the action of the spring, it is difficult to insert the electrode between them at the beginning. By setting up the clamping cylinder, the clamping cylinder lifts the pressure roller to a certain height to overcome the pressure of the spring, thereby facilitating the insertion of the electrode.

[0028] Specifically, the cutting mechanism 2 includes a transverse moving cylinder 21, a longitudinal moving cylinder 22, and a cutter 23. The cutter is fixed to the piston rod of the longitudinal moving cylinder via a cutter connecting plate 24, and the longitudinal moving cylinder is fixed to the piston rod of the transverse moving cylinder via a cylinder connecting plate 25. The longitudinal moving cylinder is used to adjust the vertical position of the cutter, and the transverse moving cylinder drives the cutter to move left and right to achieve the cutting action. When cutting is required, the transverse moving cylinder drives the cutter to extend above the electrode tape, and then the longitudinal moving cylinder drives the cutter to move down to the edge of the electrode tape. Finally, the transverse moving cylinder retracts to retract the cutter, and the electrode tape is cut during the retraction process.

[0029] Furthermore, to ensure that the electrode tape does not move during the cutting process, a clamping mechanism 3 is added to this device. This clamping mechanism includes a clamping cylinder 31, a clamping frame 32, and a clamping seat 33. The clamping cylinder 31 is fixed to one side of the connecting block 19, and the piston rod of the clamping cylinder is fixed to the top of the clamping frame. The clamping frame has an inverted U-shaped structure, and the clamping seats 33 are divided into two groups, which are fixed to the bottom two sides of the clamping frame respectively. The clamping cylinder drives the clamping frame to move up and down, and the clamping seats 33 clamp the electrode tape. The cutter passes through the middle of the clamping frame and cuts the tape.

[0030] Specifically, the cutting support 5 is located below the pressing mechanism 3. The cutting support 5 has a cutting groove 51 at the position corresponding to the cutter, so that the cutting blade can easily cut into it. The pressing adhesive seat 33 presses the electrode tape onto the cutting support, so that the cutter can easily cut the electrode tape. Since the electrode has a certain tension under the drive of the conveying mechanism, and the pressing mechanism can press the electrode tape tightly, the cutter will not stick during the cutting process.

[0031] Working principle:

[0032] During the initial feeding process, the clamping cylinder 10 is activated, and the piston rod lifts the guide rod 17, causing the pressure roller 13 to rise against the pressure of the spring 18, facilitating the feeding of the electrode tape between the two rollers. After feeding is completed, the clamping cylinder 10 returns to its original position, and the pressure roller 13 presses the tape under the action of the spring 18. As the conveyor roller 12 rotates, the tape continues to be conveyed forward.

[0033] When the tape is conveyed to the cutting position, the clamping mechanism 3 starts to work. The clamping cylinder 31 is activated, the piston rod extends, and pushes the clamping frame 32 downward, so that the clamping seat 33 presses the electrode tape tightly onto the cutting support seat 5, preventing the tape from shifting during the cutting process and ensuring cutting accuracy.

[0034] During cutting, the lateral movement cylinder 21 actuates first, causing the cutter 23 to extend above the electrode tape. Next, the longitudinal movement cylinder 22 actuates, adjusting the cutter 23 to move downwards to a suitable position at the edge of the electrode tape. Finally, the lateral movement cylinder 21 retracts, causing the cutter 23 to return, cutting the tape during the return process. After cutting, the cutter 23 returns to its initial position under the action of the two cylinders, awaiting the next cutting command. The cutting support 5 is equipped with a cutting groove 51 corresponding to the cutter 23, facilitating the cutter 23's entry and preventing direct contact between the cutter and the support, thus avoiding wear. The clamping base 33 is located on both sides of the cutting groove 51, further ensuring the stability of the tape during cutting.

[0035] For those skilled in the art, several improvements and modifications can be made without departing from the principle of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model.

Claims

1. A lithium battery electrode tape cutting mechanism, characterized in that: It includes a conveying mechanism, a cutting mechanism, a pressing mechanism, a support frame, and a cutting support base. The conveying mechanism is mounted on the support frame and is used to convey electrode tape. The cutting mechanism is used to cut the tape. The pressing mechanism is used to press the tape tightly before cutting it. The cutting support base is fixed on the support frame.

2. The electrode tape cutting mechanism for lithium battery production according to claim 1, characterized in that: The support frame consists of a base plate, a left upright plate, a right upright plate, a rear upright plate, and a front crossbeam. The left and right upright plates are fixed to the left and right sides of the base plate, respectively. The rear upright plate is fixed to the rear side of the base plate. The front crossbeam is fixed at an upper position between the left and right upright plates.

3. The electrode tape cutting mechanism for lithium battery production according to claim 2, characterized in that: The conveying mechanism includes a motor, a conveying roller, and a pressure roller. The pressure roller and the conveying roller clamp the tape. The motor is fixed to the inside of the left vertical plate by a motor bracket. The output end of the motor passes through the left vertical plate and is connected to the conveying roller located on the outside of the left vertical plate. The motor drives the conveying roller to rotate.

4. The electrode tape cutting mechanism for lithium battery production according to claim 3, characterized in that: The pressure roller is installed on the upper part of the conveyor roller. The pressure roller is mounted on the sliding seat through the bearing. The sliding seat slides in cooperation with the guide rail vertically set on the left upright plate. A guide rod is connected to the top of the support seat. A spring is sleeved on the guide rod. A connecting block is fixed on the top of the left upright plate. One end of the spring contacts the bottom of the connecting block and the other end contacts the sliding seat, so that the pressure roller always has a downward pressure.

5. The electrode tape cutting mechanism for lithium battery production according to claim 4, characterized in that: The top of the guide rod is connected to the piston rod of the clamping cylinder, and the clamping cylinder is fixed on the connecting block.

6. The electrode tape cutting mechanism for lithium battery production according to claim 2, characterized in that: The cutting mechanism includes a transverse moving cylinder, a longitudinal moving cylinder, and a cutter. The cutter is fixed to the piston rod of the longitudinal moving cylinder via a cutter connecting plate. The longitudinal moving cylinder is fixed to the piston rod of the transverse moving cylinder. The transverse moving cylinder is fixed to the front crossbeam. The longitudinal moving cylinder is used to adjust the vertical position of the cutter. The transverse moving cylinder drives the cutter to move left and right to achieve the cutting action.

7. The electrode tape cutting mechanism for lithium battery production according to claim 2, characterized in that: The clamping mechanism includes a clamping cylinder, a clamping frame, a clamping rubber seat, and a connecting block. The connecting block is fixed to the upper outer side of the left upright plate. The clamping cylinder is fixed to one side of the connecting block. The piston rod of the clamping cylinder is fixed to the top of the clamping frame. The clamping rubber seat is divided into two groups and is fixed to the bottom two sides of the clamping frame respectively.

8. The electrode tape cutting mechanism for lithium battery production according to claim 7, characterized in that: The clamping frame has an inverted U-shaped structure.

9. The electrode tape cutting mechanism for lithium battery production according to claim 7, characterized in that: The cutting support is located below the clamping mechanism and is fixed to the left upright plate. A cutting groove is provided on the cutting support at the position corresponding to the cutter.

10. The electrode tape cutting mechanism for lithium battery production according to claim 9, characterized in that: The clamping rubber seat is located on both sides of the cutting groove.

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