Lithium battery pole piece slitting equipment
By using a closed-loop control system that combines a slitting tool holder and CCD camera detection in the lithium battery electrode slitting equipment, the problem of large electrode width error is solved and accurate slitting of the electrode width is achieved.
Patent Information
- Application Number
- CN202422964602.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-03
- Publication Date
- 2025-09-23
- Estimated Expiration
- 2034-12-03
AI Technical Summary
Existing lithium battery electrode slitting equipment uses three sets of synchronized cutting heads for cutting, resulting in large errors in electrode width, making it difficult to ensure the accuracy and consistency of the coating area width.
The first and second slitting tool holders are used for slitting respectively, and the width is detected by the first CCD camera and the second CCD camera. The closed-loop control correction system is used to adjust the position of the pole piece to ensure the width accuracy of each pole piece.
It effectively reduces the electrode width error, ensures the consistent width accuracy of the coating area of each electrode, and improves the slitting accuracy.
Smart Images
Figure CN223372410U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field related to lithium battery pole piece cutting, and in particular to a lithium battery pole piece cutting device. Background Art
[0002] There is a typical coating process in the production process of lithium battery pole pieces, in which two strips of coating are coated on a piece of foil. When the pole piece of this process flows into the subsequent slitting process, the pole piece needs to be cut into four parts, and the width accuracy of the coating area on the four pole pieces should be as high as possible and close to equal. However, due to factors such as equipment accuracy and material properties, the width of the coating area of the pole piece that finally flows to the slitting process and the blank width on both sides of the foil area are not necessarily equal and consistent at all times. The slitting tool holder structure of the slitting process determines that it is impossible to move the blade left and right to adjust the position during the slitting process. Therefore, when slitting such pole pieces, they are generally cut directly into four strips. The width error of the four pole pieces obtained in this way is relatively large, and a lithium battery pole piece slitting device is required.
[0003] The existing lithium battery electrode slitting equipment uses three sets of synchronized blades to cut the electrode simultaneously during use, so the width error of the electrode cut out is relatively large. Utility Model Content
[0004] The purpose of the present utility model is to provide a lithium battery pole piece slitting device to solve the problem that the existing lithium battery pole piece slitting device proposed in the above background technology uses three sets of synchronized cutter heads to cut the pole pieces simultaneously during use, so that the width error of the pole pieces cut out is large.
[0005] To achieve the above-mentioned objectives, the utility model provides the following technical solutions: a lithium battery electrode slitting device, including an unwinding device, one end of the unwinding device is wound with an electrode, one end of the electrode is provided with a correction sensor, one end of the electrode passes through a splicing platform, a first tension detection roller is provided on one side of the splicing platform, one end of the electrode passes through a first process correction, one end of the electrode passes through a first traction roller, a first slitting knife holder is provided on one side of the first traction roller, one end of the first slitting knife holder cuts out a first slitting strip, one end of the first slitting strip passes through a first dust removal device, a first CCD camera is provided above one side of the first slitting strip, one end of the first slitting strip passes through a second tension detection roller, an upper labeling machine is provided above the second tension detection roller, one end of the first slitting strip is wrapped and connected to an upper reel, and one end of the upper reel is equipped with an upper reel pressure wheel.
[0006] Preferably, the pole piece is cut into the first slitting strip by the first slitting knife holder, and the remaining pole pieces synchronously pass through the third tension detection roller, the second process correction roller and the second traction roller to enter the second slitting knife holder, the second slitting knife holder is provided with two sets of blade heads, and the second slitting knife holder cuts out the third slitting strip and the second and fourth slitting strips.
[0007] Preferably, the third slitting strip merges with the first slitting strip and enters the first dust removal device, and the widths of the third slitting strip and the first slitting strip are detected by a first CCD camera.
[0008] Preferably, one end of the second and quartered slits passes through a second dust removal device, a second CCD camera is provided above the second and quartered slits, one end of the second and quartered slits passes through a fourth tension detection roller, a lower labeling machine is provided above the fourth tension detection roller, one end of the fourth tension detection roller is wrapped and connected with a lower reel, and one end of the lower reel is installed with a lower reel pressure wheel.
[0009] Preferably, the widths of the second and quartered strips are detected by a second CCD camera.
[0010] Preferably, the first traction roller and the second traction roller have matching structures, and both of them are controlled by motors to rotate their roller shafts.
[0011] Preferably, the upper winding and lower winding structures are consistent.
[0012] Compared with the prior art, the beneficial effects of the present invention are as follows: the lithium battery pole piece slitting equipment is provided with a first slitting knife holder and a second slitting knife holder, and there is a first process correction in front of the first slitting knife holder, and a second process correction in front of the second slitting knife holder, and after the second slitting, a first CCD camera and a second CCD camera are respectively installed, the first CCD camera is used to detect the width dimensions of the first slitting strip and the third slitting strip, and the second CCD camera detects the width dimensions of the second and fourth slitting strips. At the same time, the width value of the first slitting strip detected by the first CCD camera is subtracted from the width value of the second slitting strip detected by the second CCD camera, and the difference is closed-loop controlled with the first process correction; the width value of the third slitting strip detected by the first camera is subtracted from the width value of the fourth slitting strip detected by the second camera, and the difference is closed-loop controlled with the second process correction, which well ensures that the width accuracy of each pole piece cut out is the highest under the correction control. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] Figure 1 This is a schematic diagram of the basic structure of the utility model equipment;
[0014] Figure 2 This is a schematic diagram of the structure of the pole piece cutting principle of the utility model;
[0015] Figure 3 This is a schematic diagram of the structure of the pole piece cutting line position of the utility model.
[0016] In the figure: 1. Unwinding; 2. Pole piece; 3. Correction sensor; 4. Splicing platform; 5. First tension detection roller; 6. First process correction; 7. First traction roller; 8. First slitting knife holder; 9. First slitting strip; 10. First dust removal device; 11. First CCD camera; 12. Second tension detection roller; 13. Upper labeling machine; 14. Upper rewinding; 15. Upper rewinding pressure roller; 16. Third tension detection roller; 17. Second process correction; 18. Second traction roller; 19. Second slitting knife holder; 20. Third slitting strip; 21. Second and fourth slitting strips; 22. Second dust removal device; 23. Second CCD camera; 24. Fourth tension detection roller; 25. Lower labeling machine; 26. Lower rewinding; 27. Lower rewinding pressure roller. DETAILED DESCRIPTION
[0017] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.
[0018] See also Figure 1-3 The utility model provides a technical solution: a lithium battery electrode slitting device, including an unwinding 1, a electrode 2 is wound on one end of the unwinding 1, a correction sensor 3 is provided at one end of the electrode 2, one end of the electrode 2 passes through a splicing platform 4, a first tension detection roller 5 is provided on one side of the splicing platform 4, one end of the electrode 2 passes through a first process correction 6, one end of the electrode 2 passes through a first traction roller 7, a first slitting knife holder 8 is provided on one side of the first traction roller 7, one end of the first slitting knife holder 8 cuts out a first slitting strip 9, one end of the first slitting strip 9 passes through a first dust removal device 10, a first CCD camera 11 is provided above one side of the first slitting strip 9, one end of the first slitting strip 9 passes through a second tension detection roller 12, an upper labeling machine 13 is provided above the second tension detection roller 12, one end of the first slitting strip 9 is wrapped and connected with an upper reel 14, and one end of the upper reel 14 is installed with an upper reel pressure wheel 15.
[0019] Furthermore, the pole piece 2 is cut into the first slitting strip 9 by the first slitting knife holder 8, and the remaining pole piece 2 synchronously passes through the third tension detection roller 16, the second process correction 17 and the second traction roller 18 to enter the second slitting knife holder 19. The second slitting knife holder 19 is provided with two sets of knife heads, and the second slitting knife holder 19 cuts out the third slitting strip 20 and the second and fourth slitting strips 21. Through the setting of the first slitting knife holder 8 and the second slitting knife holder 19, the first slitting knife holder 8 is provided with a set of knife heads, which can cut the pole piece into two parts, the first slitting strip 9 can be rolled up, and the remaining part enters the second slitting knife holder 19 to be cut into three parts. The slitting of different processes is then performed using the first CCD camera 11 and the second CCD camera 23 for width detection and precise adjustment.
[0020] Furthermore, the third slitting strip 20 merges with the first slitting strip 9 and enters the first dust removal device 10. The width of the third slitting strip 20 and the first slitting strip 9 is detected by the first CCD camera 11. Through the setting of the first CCD camera 11, the first CCD camera 11 will detect the width of the third slitting strip 20 and the first slitting strip 9. If the width is out of tolerance, the first process correction 6 and the second process correction 17 will be controlled to move the position of the pole piece 2 in front of the slitting unit until the width of the third slitting strip 20 and the first slitting strip 9 detected by the first CCD camera 11 meets the requirements.
[0021] Furthermore, one end of the second and quarter-cut strips 21 passes through the second dust removal device 22, a second CCD camera 23 is arranged above the second and quarter-cut strips 21, one end of the second and quarter-cut strips 21 passes through the fourth tension detection roller 24, a lower labeling machine 25 is arranged above the fourth tension detection roller 24, one end of the fourth tension detection roller 24 is wrapped and connected with a lower reel 26, and one end of the lower reel 26 is installed with a lower reel pressure wheel 27. Through the setting of the lower labeling machine 25, the surface of the second and quarter-cut strips 21 can be labeled.
[0022] Furthermore, the width of the second and quarter-cut strips 21 is detected by the second CCD camera 23. Through the setting of the second CCD camera 23, the second CCD camera 23 will detect the width of the second and quarter-cut strips 21. If the width is out of tolerance, the first process correction 6 and the second process correction 17 will be controlled to move the position of the pole piece 2 in front of the cutting unit until the width of the second and quarter-cut strips 21 detected by the second CCD camera 23 meets the requirements.
[0023] Furthermore, the first traction roller 7 and the second traction roller 18 have the same structure, and both of them control the rotation of the roller shaft through motors.
[0024] Furthermore, the structures of the upper reel 14 and the lower reel 26 are consistent.
[0025] Working principle: First, the pole piece 2 material is wound onto the unwinding 1, and then the pole piece 2 passes through the correction sensor 3, the splicing platform 4, the first tension detection roller 5, the first process correction 6, the first traction roller 7 and enters the first slitting knife frame 8. After the pole piece 2 passes through the first slitting knife frame 8, it is cut into the first slitting strip 9 of the finished product, and the remaining part passes through the third tension detection roller 16, the second process correction 17, the second traction roller 18 and enters the second slitting knife frame 19. The second slitting knife frame 19 cuts out the third slitting strip 20 of the finished product and the second and fourth slitting strips. The cut strip 21, the third cut strip 20 merges with the first cut strip 9 and passes through the first dust removal device 10, and then the width is detected by the first CCD camera 11, and then passes through the upper labeling machine 13 and is wound by the upper reel 14. The second and quarter cut strips 21 pass through the second CCD camera 23 to detect the width, and then pass through the lower labeling machine 25 and are wound by the lower reel 26. While the first CCD camera 11 and the second CCD camera 23 detect the width, they control the first process correction 6 and the second process correction 17 to control the conveying position of the electrode 2 in real time.
[0026] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A lithium battery electrode slitting device, comprising an unwinding machine (1), characterized in that: One end of the unwinding (1) is wound with a pole piece (2), one end of the pole piece (2) is provided with a deviation correction sensor (3), one end of the pole piece (2) passes through a tape connection platform (4), one side of the tape connection platform (4) is provided with a first tension detection roller (5), one end of the pole piece (2) passes through a first process deviation correction (6), one end of the pole piece (2) passes through a first traction roller (7), one side of the first traction roller (7) is provided with a first slitting knife holder (8), one end of the first slitting knife holder (8) is provided with a first slitting knife holder (8), and one end of the first slitting knife holder (8) is provided with a first slitting knife holder (8). A first slitting strip (9) is cut out, one end of the first slitting strip (9) passes through a first dust removal device (10), a first CCD camera (11) is arranged above one side of the first slitting strip (9), one end of the first slitting strip (9) passes through a second tension detection roller (12), an upper labeling machine (13) is arranged above the second tension detection roller (12), one end of the first slitting strip (9) is wound and connected to an upper reel (14), and one end of the upper reel (14) is installed with an upper reel pressure wheel (15).
2. The lithium battery electrode cutting device according to claim 1, characterized in that: The pole piece (2) is cut into a first slit strip (9) by a first slit blade holder (8), and the remaining pole pieces (2) synchronously pass through a third tension detection roller (16), a second process deviation correction roller (17) and a second traction roller (18) to enter a second slit blade holder (19), wherein the second slit blade holder (19) is provided with two groups of blade heads, and the second slit blade holder (19) cuts out a third slit strip (20) and a second and fourth slit strips (21).
3. The lithium battery electrode cutting device according to claim 2, characterized in that: The third slitting strip (20) and the first slitting strip (9) merge into a first dust removal device (10), and the widths of the third slitting strip (20) and the first slitting strip (9) are detected by a first CCD camera (11).
4. The lithium battery electrode cutting device according to claim 2, characterized in that: One end of the second and quartered slit strip (21) passes through a second dust removal device (22), a second CCD camera (23) is arranged above the second and quartered slit strip (21), one end of the second and quartered slit strip (21) passes through a fourth tension detection roller (24), a lower labeling machine (25) is arranged above the fourth tension detection roller (24), one end of the fourth tension detection roller (24) is wound and connected with a lower reel (26), and one end of the lower reel (26) is installed with a lower reel pressure wheel (27).
5. The lithium battery electrode cutting device according to claim 4, characterized in that: The width of the second and quartered strips (21) is detected by a second CCD camera (23).
6. The lithium battery electrode cutting device according to claim 1, characterized in that: The first traction roller (7) and the second traction roller (18) have the same structure, and both of them control the rotation of the roller shaft through motors.
7. The lithium battery electrode cutting device according to claim 1, characterized in that: The upper winding (14) and lower winding (26) structures are consistent.