Pole piece tension adjusting device and tension adjusting method

Abstract

The invention discloses a pole piece tension adjusting device and a tension adjusting method, and belongs to the technical field of tension adjustment. The pole piece tension adjusting device comprises a mounting frame, a fixing frame is arranged outside the mounting frame, a height adjusting mechanism is arranged between the fixing frame and the mounting frame, a passing roller is rotationally arranged below the mounting frame, and angle adjusting mechanisms for adjusting the inclination angle of the passing roller are arranged at the two ends of the mounting frame. The two ends of the passing roller are connected with the angle adjusting mechanism through spherical bearings. According to the pole piece tension adjusting device and the tension adjusting method, the problems that in the winding process of an existing pole piece, belt breakage is likely to happen, winding is uneven, and the winding efficiency is affected due to pole piece slipping can be solved.

Description

Technical Field

[0001] The present invention relates to the technical field of tension adjustment, and in particular to a pole piece tension adjustment device and a tension adjustment method. Background Art

[0002] Lithium batteries are made of positive and negative electrodes and separators. The production process of lithium battery electrodes includes coating conductive slurry on copper foil or aluminum foil. During the coating process, it is necessary to reserve the position of the pole lugs (without coating the conductive slurry). After drying, the solvent in the conductive slurry is removed to form the poles. The coating on the poles is compacted and densified by rollers, and then cut and stripped to form poles of the required specifications, and the pole lugs are cut out. The cut poles are passed through a winding machine to wind the positive poles, negative poles and separators together to form a battery cell.

[0003] Among them, during the compaction process of the pole piece, the material area of ​​the pole piece coated with conductive slurry is relatively thick. During the compaction process by the pressure roller, the pole piece is stretched under the action of the pressure roller. Since the pole ear edge of the pole piece is relatively thin, the pressure of the pressure roller on the pole ear edge is relatively small, and the ductility of the pole ear edge is relatively poor. This leads to different ductility between the pole piece material area and the pole ear edge. When the pole piece is wound by the winding machine, the roller provides tension to the pole piece. Since the ductility of the pole ear is relatively poor, this causes the pole ear to be subjected to relatively large force, while the material area is subjected to relatively small force. During the winding process, the belt is prone to breakage and uneven winding.

[0004] In addition, during the winding process of the winding machine, after the winding of a battery cell is completed, the electrode sheet needs to be cut off and the winding process stops, but the unwinding process of the electrode sheet does not stop, resulting in more electrode sheets being released between the winding of two battery cells. The electrode sheets become loose, affecting the compactness and neatness of the electrode sheet winding. On the other hand, it is easy to cause the electrode sheets to slip off the roller, affecting the winding efficiency of the battery cell. Summary of the invention

[0005] The purpose of the present invention is to provide a pole piece tension adjustment device and a tension adjustment method to solve the problems that the existing pole pieces are prone to tape breakage, uneven winding, and pole piece slippage affecting winding efficiency during the winding process.

[0006] To achieve the above-mentioned purpose, the present invention provides a pole piece tension adjustment device, including a mounting frame, a fixed frame is arranged outside the mounting frame, a height adjustment mechanism is arranged between the fixed frame and the mounting frame, a roller is rotatably arranged below the mounting frame, and angle adjustment mechanisms for adjusting the inclination angle of the roller are arranged at both ends of the mounting frame, and the two ends of the roller are connected to the angle adjustment mechanism through spherical bearings.

[0007] Preferably, the angle adjustment mechanism includes a mounting seat, which is located at both ends of the roller, the mounting seat is rotatably connected to the roller through a spherical bearing, the mounting seat is arranged on a slider, and the slider is provided with a threaded transmission hole for allowing a vertically arranged first screw rod to pass through and be compatible with the first screw rod, the first screw rod is connected to the mounting frame through a mounting structure, the first screw rod is rotatably connected to the mounting structure, an adjustment structure for adjusting the mounting structure is arranged on the mounting frame, and a power structure for driving the first screw rod to rotate is arranged on the mounting structure.

[0008] Preferably, the mounting structure includes a base, a sliding seat is arranged above the base, the base and the sliding seat are connected by a connecting plate, a guide block is arranged on one end of the sliding block close to the connecting plate, and a guide groove is arranged on the connecting plate, which is adapted to the guide block and has a guiding function for the up and down sliding of the guide block; a rotating hole for installing a first screw rod is arranged on the base, the bottom end of the first screw rod is rotatably connected to the rotating hole of the base through a bearing, a through hole is arranged on the sliding seat for allowing the top end of the first screw rod to pass through, the first screw rod and the sliding seat are rotatably connected through a bearing, and the sliding seat is arranged on the mounting frame.

[0009] Preferably, a fixing sleeve is provided on the top of the slide seat, and a through hole connected to the through hole on the slide seat is provided on the fixing sleeve, the first screw rod passes through the through hole, and a locking hole is provided on the side wall of the fixing sleeve, the locking hole is connected to the through hole and is perpendicular to the through hole, and a top screw for locking the fixing sleeve and the first screw rod is provided in the locking hole.

[0010] Preferably, the adjusting structure includes a second screw rod, one end of the second screw rod is rotatably connected to the sliding seat, and threaded holes for allowing the second screw rod to pass through and matching with the second screw rod are provided on the first side plates on both sides of the mounting frame, and a force-applying seat for driving the second screw rod to rotate is provided on the other end of the second screw rod; an adjusting groove is provided on the top of the mounting frame, and the sliding seat is located in the adjusting groove, and a horizontal guide rod is fixedly provided in the adjusting groove, and guide holes for matching with the guide rod and allowing the guide rod to pass through are provided on both sides of the sliding seat, and the guide rod is slidably connected to the guide holes; a horizontal support rod is provided on the base, and a support hole for allowing the first support rod to pass through is provided on the first side plate, and the support rod is slidably connected to the support hole.

[0011] Preferably, the mounting seat is an L-shaped structure, the mounting seat is provided with a second connecting hole penetrating therethrough, the slider is provided with a third connecting hole, and the bolts pass through the second connecting hole and the third connecting hole to fix the mounting seat and the slider; a semicircular mounting groove is provided on the stepped surface of the mounting seat, the spherical bearings at both ends of the roller are located in the mounting groove, a pressure block is provided above the stepped surface of the mounting seat, and a semicircular groove matching the mounting groove is provided on the lower surface of the pressure block, and a fixing hole is provided on the mounting seat, and the pressure block is fixedly connected to the mounting seat through bolts and the fixing hole.

[0012] Preferably, the power structure includes a first gear, which is fixedly arranged on the top of the first screw rod, and the first gear is meshed with a second gear fixedly arranged on the rotating shaft. The bottom end of the rotating shaft is located in a second mounting hole arranged on the top of the slide seat, and the rotating shaft is rotatably connected to the second mounting hole. A hexagonal groove is arranged on the top of the rotating shaft to facilitate driving the rotating shaft to rotate, and the diameter of the first gear is greater than the diameter of the second gear.

[0013] Preferably, the height adjustment mechanism includes a sliding rod, which is vertically arranged on the top of the mounting frame, and a sliding hole for the sliding rod to pass through is arranged on the fixing frame, the sliding rod is slidably connected to the sliding hole, and a limiting plate is arranged on the top of the sliding rod to prevent the sliding rod from slipping off the fixing frame, a spring is arranged between the mounting frame and the fixing frame, and the spring sleeve is arranged on the outside of the sliding rod; a positioning structure for positioning the mounting frame is arranged on the second side plates at both ends of the fixing frame.

[0014] Preferably, the positioning structure includes a positioning plate, a second side plate is provided with a vertical limit groove, a protrusion adapted to the limit groove is provided on the positioning plate, the protrusion is located in the limit groove and is slidably connected to the limit groove; anti-slip grooves are provided on both sides of the limit groove, and a locking screw is provided on the positioning plate to lock the positioning plate and the second side plate, and the locking screw is tightened in the anti-slip groove; a first side plate arranged at both ends of the mounting frame is provided with a limit block adapted to the limit groove, the limit block is located in the limit groove and is slidably connected to the limit groove.

[0015] The tension adjustment method based on the above-mentioned pole piece tension adjustment device comprises the following steps:

[0016] S1. The force-applying seat is rotated by a wrench, and the force-applying seat drives the second screw to rotate. The second screw engages with the threaded hole on the first side plate, and the second screw rotates and slides on the first side plate. The second screw drives the slide to slide in the adjustment groove to adjust the distance between the two mounting seats;

[0017] S2. Install spherical bearings at both ends of the roller, place the spherical bearings in the mounting grooves of the mounting seat, place a pressing block above the mounting seat, the spherical bearings are located in the semicircular groove at the bottom of the pressing block, and lock the pressing block and the mounting seat with bolts;

[0018] S3, the rotating shaft is driven to rotate through the wrench and the hexagonal groove on the rotating shaft, the rotating shaft drives the first gear to rotate through the second gear, the first gear drives the first screw to rotate, the first screw drives the slider to slide up and down, the slider drives one end of the roller to slide up and down through the mounting seat and the pressure block to adjust the inclination angle of the roller;

[0019] S4. During the winding process of the pole piece, the spring provides an upward pulling force for the mounting frame, and the mounting frame provides tension to the pole piece through the roller to keep the pole piece taut; the positioning plate limits the mounting frame through the limit block to maintain the tension of the pole piece.

[0020] The advantages and positive effects of the pole piece tension adjustment device and tension adjustment method described in the present invention are:

[0021] 1. The present invention is provided with an angle adjustment mechanism, which reduces the tension of the roller on the pole piece and the force on the pole piece by adjusting the inclination angle of the roller, thereby reducing the problem of broken belt and uneven winding caused by excessive force on the pole piece. The two ends of the roller are connected to the angle adjustment mechanism through spherical bearings, and the spherical bearings meet the need of the roller to tilt and keep rotating at the same time.

[0022] 2. A slide bar and a spring are provided between the mounting frame and the fixed frame. The spring applies an upward pulling force to the mounting frame, thereby applying an upward pulling force to the roller through the mounting frame to tighten the pole piece to prevent the pole piece from slipping due to looseness, thereby affecting the pole piece winding efficiency.

[0023] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of an embodiment of the present invention;

[0025] Figure 2 A schematic diagram of the angle adjustment mechanism structure of an embodiment of the present invention;

[0026] Figure 3 A schematic diagram of the structure of a fixing frame according to an embodiment of the present invention;

[0027] Figure 4 It is a schematic diagram of the slide structure of an embodiment of the present invention;

[0028] Figure 5 This is a schematic diagram of the mounting base structure of an embodiment of the present invention;

[0029] Figure 6 A schematic diagram of a slider structure according to an embodiment of the present invention;

[0030] Figure 7 For attachment Figure 1 A is an enlarged view.

[0031] Reference numerals

[0032] 1. Mounting frame; 2. Fixing frame; 3. Roller; 4. Mounting seat; 5. Pressing block; 6. Sliding block; 7. First screw rod; 8. Base; 9. Sliding seat; 10. Connecting plate; 11. Second screw rod; 12. Force seat; 13. Support rod; 14. Limiting block; 15. Sliding rod; 16. Limiting plate; 17. Spring; 18. First side plate; 19. Threaded hole; 20. Support hole; 21. First connecting hole; 22. Adjusting slot; 2 3. Second side plate; 24. Sliding hole; 25. Limiting groove; 26. Positioning plate; 27. Anti-slip groove; 28. Locking screw; 29. ​​Fixing sleeve; 30. Locking hole; 31. Through hole; 32. Second mounting hole; 33. Guide hole; 34. Mounting groove; 35. Second connecting hole; 36. Fixing hole; 37. Third connecting hole; 38. Transmission hole; 39. Guide block; 40. First gear; 41. Second gear; 42. Rotating shaft. DETAILED DESCRIPTION

[0033] The technical solution of the present invention is further described below through the accompanying drawings and embodiments.

[0034] Unless otherwise defined, the technical terms or scientific terms used in the present invention should be understood by people with ordinary skills in the field to which the present invention belongs. The words "first", "second" and similar words used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprise" and similar words mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0035] Example

[0036] like Figure 1As shown. A pole piece tension adjustment device comprises a mounting frame 1, a fixing frame 2 is arranged outside the mounting frame 1, and a height adjustment mechanism is arranged between the fixing frame 2 and the mounting frame 1. The height of the mounting frame 1 is automatically adjusted by the height adjustment mechanism, so that the pole piece is tensioned. A roller 3 is rotatably arranged below the mounting frame 1, and angle adjustment mechanisms for adjusting the inclination angle of the roller 3 are arranged at both ends of the mounting frame 1. The pole piece is wound on the roller 3 and bypassed from the roller 3. The angle adjustment mechanism reduces the tension of the roller 3 on the pole ear on the pole piece by adjusting the inclination angle of the roller 3, reduces the force at the pole ear, and thus reduces the problem of broken belt and uneven winding caused by excessive force on the pole ear. The two ends of the roller 3 are connected to the angle adjustment mechanism through spherical bearings, and the spherical bearings meet the need of the roller 3 to tilt and keep rotating at the same time.

[0037] like Figure 2 , Figure 5 , Figure 6 As shown. The angle adjustment mechanism includes a mounting seat 4, which is located at both ends of the roller 3. The mounting seat 4 is rotatably connected to the roller 3 through a spherical bearing. The mounting seat 4 is fixedly arranged on the slider 6. The mounting seat 4 is an L-shaped structure, and a second connecting hole 35 is provided on the mounting seat 4, and a third connecting hole 37 is provided on the slider 6. Bolts pass through the second connecting hole 35 and the third connecting hole 37 to fix the mounting seat 4 and the slider 6. A semicircular mounting groove 34 is provided on the stepped surface of the mounting seat 4, and the spherical bearings at both ends of the roller 3 are located in the mounting groove 34. A pressing block 5 is provided above the stepped surface of the mounting seat 4, and a semicircular groove matching the mounting groove 34 is provided on the lower surface of the pressing block 5. The spherical bearing is located in a circular groove surrounded by the mounting groove 34 and the semicircular groove. A fixing hole 36 is provided on the mounting seat 4, and the pressing block 5 is fixedly connected to the mounting seat 4 through bolts and the fixing hole 36. The arrangement of the mounting seat 4 and the pressing block 5 facilitates the installation of the roller 3 and the spherical bearing.

[0038] The slider 6 is provided with a threaded transmission hole 38 through which the vertically arranged first screw rod 7 passes and is adapted to the first screw rod 7. The first screw rod 7 is connected to the mounting frame 1 through a mounting structure, and the first screw rod 7 is rotatably connected to the mounting structure.

[0039] The mounting structure includes a base 8, a slide 9 is arranged above the base 8, and the base 8 and the slide 9 are fixedly connected by a connecting plate 10. A guide block 39 is arranged on one end of the slider 6 close to the connecting plate 10, and a guide groove adapted to the guide block 39 is arranged on the connecting plate 10, and the guide block 39 is located in the guide groove and slidably connected with the guide groove. The guide groove has a guiding effect on the up and down sliding of the guide block 39. A rotating hole for installing the first screw rod 7 is arranged on the base 8, and the bottom end of the first screw rod 7 is rotatably connected to the rotating hole of the base 8 through a bearing. A through hole is arranged on the slide 9 for the top end of the first screw rod 7 to pass through, and the first screw rod 7 is rotatably connected to the slide 9 through a bearing. The slide 9 is arranged on the mounting frame 1.

[0040] like Figure 4 As shown. A fixing sleeve 29 is fixedly arranged on the top of the slide 9, and a through hole 31 is arranged on the fixing sleeve 29 and communicated with the through hole on the slide 9, and the first screw rod 7 passes through the through hole 31. A locking hole 30 is arranged on the side wall of the fixing sleeve 29, and the locking hole 30 is communicated with the through hole 31 and is perpendicular. A top screw for locking the fixing sleeve 29 and the first screw rod 7 is arranged in the locking hole 30. The fixing sleeve 29 and the top screw are used to lock the first screw rod 7, so as to improve the stability of the roller 3 during the pole piece winding process.

[0041] The mounting frame 1 is provided with an adjustment structure for adjusting the slide 9. The adjustment structure includes a second screw rod 11, one end of which is rotatably connected to one end of the slide 9 through a bearing. The first side plates 18 on both sides of the mounting frame 1 are provided with threaded holes 19 for the second screw rod 11 to pass through and to match the second screw rod 11. The other end of the second screw rod 11 is provided with a force application seat 12 for driving the second screw rod 11 to rotate, and the force application seat 12 is a hexagonal seat, which is convenient for driving the second screw rod 11 to rotate. The top of the mounting frame 1 is provided with an adjustment groove 22, and the slide 9 is located in the adjustment groove 22. A horizontal guide rod is fixedly provided in the adjustment groove 22, and guide holes 33 are provided on both sides of the slide 9 to match the guide rod and allow the guide rod to pass through, and the guide rod is slidably connected to the guide hole 33. The guide rod has a guiding and supporting function for the sliding of the slide 9. A horizontal support rod 13 is fixedly provided on the base 8, and a support hole 20 is provided on the first side plate 18 for the first support rod 13 to pass through, and the support rod 13 is slidably connected to the support hole 20. The support rod 13 supports the base 8 to improve the stability of the base 8 .

[0042] By rotating the second screw rod 11 , the position of the slide seat 9 in the adjustment slot 22 can be adjusted, thereby adjusting the distance between the mounting seats 4 to facilitate the installation of rollers 3 of different lengths.

[0043] like Figure 7 As shown. A power structure for driving the first screw rod 7 to rotate is provided on the slide 9. The power structure includes a first gear 40, and the first gear 40 is fixedly arranged on the top of the first screw rod 7. The first gear 40 is meshed with a second gear 41 fixedly arranged on the rotating shaft 42. The diameter of the first gear 40 is larger than the diameter of the second gear 41, so that the first screw rod 7 can be adjusted more accurately through the second gear 41 and the first gear 40. The bottom end of the rotating shaft 42 is located in the second mounting hole 32 set at the top of the slide 9, and the rotating shaft 42 is rotatably connected to the second mounting hole 32 through a bearing. A hexagonal groove is provided on the top of the rotating shaft 42 for facilitating the rotation of the rotating shaft 42. After loosening the top screw on the fixing sleeve 29, the first screw rod 7 can be driven to rotate through the first gear 40 and the second gear 41.

[0044] like Figure 1 , Figure 3As shown. The height adjustment mechanism includes a slide bar 15, and the slide bar 15 is vertically fixed on the top of the mounting frame 1. The fixed frame 2 is provided with a slide hole 24 for the slide bar 15 to pass through, and the slide bar 15 is slidably connected to the slide hole 24. The slide hole 24 has a guiding function for the up and down sliding of the slide bar 15. A limit plate 16 is fixedly provided at the top of the slide bar 15 to prevent the slide bar 15 from slipping off the fixed frame 2. A spring 17 is provided between the mounting frame 1 and the fixed frame 2, and the spring 17 is sleeved on the outside of the slide bar 15. The two ends of the spring 17 are fixedly connected to the mounting frame 1 and the fixed frame 2 respectively. The spring 17 applies an upward pulling force to the mounting frame 1, thereby applying an upward pulling force to the roller 3 through the mounting frame 1 to tighten the pole piece.

[0045] The second side plates 23 at both ends of the fixing frame 2 are provided with positioning structures for positioning the mounting frame 1. The positioning structure includes a positioning plate 26, and a vertical limiting groove 25 is provided on the second side plate 23. A protrusion adapted to the limiting groove 25 is fixedly provided on the positioning plate 26, and the protrusion is located in the limiting groove 25 and is slidably connected with the limiting groove 25. The limiting groove 25 is configured as a T-slot or a dovetail groove. Anti-skid grooves 27 are provided on both sides of the limiting groove 25, and a locking screw 28 is provided on the positioning plate 26 to lock the positioning plate 26 with the second side plate 23, and the locking screw 28 is tightened in the anti-skid groove 27. By loosening the locking screw 28, the position of the positioning plate 26 in the limiting groove 25 can be adjusted, so that the roller 3 can be positioned at different heights, and the stability of the tensioning of the roller 3 on the pole piece is improved. The first side plate 18 is fixedly provided with a limit block 14 adapted to the limit groove 25, and the limit block 14 is fixedly connected to the first side plate 18 through a bolt and a first connecting hole 21. The limit block 14 is located in the limit groove 25 and is slidably connected to the limit groove 25. The positioning plate 26 positions the mounting frame 1 through the limit block 14.

[0046] The tension adjustment method based on the above-mentioned pole piece tension adjustment device comprises the following steps:

[0047] S1. Use a wrench to rotate the force-applying seat 12, which drives the second screw rod 11 to rotate. The second screw rod 11 engages with the threaded hole on the first side plate 18, and the second screw rod 11 rotates and slides on the first side plate 18. The second screw rod 11 drives the slide seat 9 to slide in the adjustment groove 22 to adjust the distance between the two mounting seats 4.

[0048] S2. Install spherical bearings at both ends of the roller 3, place the spherical bearings in the mounting grooves 34 of the mounting seat 4, place a pressing block 5 above the mounting seat 4, the spherical bearings are located in the semicircular groove at the bottom of the pressing block 5, and lock the pressing block 5 and the mounting seat 4 with bolts.

[0049] S3, loosen the top screw on the fixing sleeve 29, drive the rotating shaft 42 to rotate through the wrench and the hexagonal groove on the rotating shaft 42, the rotating shaft 42 drives the first gear 40 to rotate through the second gear 41, the first gear 40 drives the first screw rod 7 to rotate, the first screw rod 7 drives the slider 6 to slide up and down, the slider 6 drives one end of the roller 3 to slide up and down through the mounting seat 4 and the pressure block 5, and adjust the inclination angle of the roller 3. After the adjustment is completed, tighten the top screw.

[0050] S4. During the winding process of the pole piece, the spring 17 provides an upward pulling force for the mounting frame 1, and the mounting frame 1 provides tension to the pole piece through the roller 3 to keep the pole piece taut. The positioning plate 26 limits the mounting frame 1 through the limit block 14 to maintain the tension of the pole piece.

[0051] Therefore, the use of the pole piece tension adjustment device and tension adjustment method described in the present invention can solve the problems of the existing pole piece being prone to tape breakage, uneven winding, and pole piece slippage affecting winding efficiency during the winding process.

[0052] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that they can still modify or replace the technical solution of the present invention with equivalents, and these modifications or equivalent replacements cannot cause the modified technical solution to deviate from the spirit and scope of the technical solution of the present invention.

Claims

1. A pole piece tension adjustment device, characterized in that: It includes a mounting frame, a fixing frame is arranged outside the mounting frame, a height adjustment mechanism is arranged between the fixing frame and the mounting frame, a roller is rotatably arranged below the mounting frame, angle adjustment mechanisms for adjusting the inclination angle of the roller are arranged at both ends of the mounting frame, and both ends of the roller are connected to the angle adjustment mechanism through spherical bearings.

2. A pole piece tension adjustment device according to claim 1, characterized in that: The angle adjustment mechanism includes a mounting seat, which is located at both ends of the roller, and the mounting seat is rotatably connected to the roller through a spherical bearing. The mounting seat is arranged on a slider, and the slider is provided with a threaded transmission hole for allowing a vertically arranged first screw rod to pass through and be compatible with the first screw rod. The first screw rod is connected to the mounting frame through a mounting structure, and the first screw rod is rotatably connected to the mounting structure. An adjustment structure for adjusting the mounting structure is arranged on the mounting frame, and a power structure for driving the first screw rod to rotate is arranged on the mounting structure.

3. A pole piece tension adjustment device according to claim 2, characterized in that: The mounting structure includes a base, a sliding seat is arranged above the base, the base and the sliding seat are connected by a connecting plate, a guide block is arranged on one end of the sliding block close to the connecting plate, and a guide groove is arranged on the connecting plate, which is adapted to the guide block and has a guiding function for the up and down sliding of the guide block; a rotating hole for installing a first screw rod is arranged on the base, the bottom end of the first screw rod is rotatably connected to the rotating hole of the base through a bearing, a through hole is arranged on the sliding seat for allowing the top end of the first screw rod to pass through, the first screw rod and the sliding seat are rotatably connected through a bearing, and the sliding seat is arranged on the mounting frame.

4. A pole piece tension adjustment device according to claim 3, characterized in that: A fixing sleeve is arranged on the top of the slide seat, a through hole connected to the through hole on the slide seat is arranged on the fixing sleeve, the first screw rod passes through the through hole, a locking hole is arranged on the side wall of the fixing sleeve, the locking hole is connected to the through hole and is perpendicular to the through hole, and a top screw for locking the fixing sleeve and the first screw rod is arranged in the locking hole.

5. A pole piece tension adjustment device according to claim 3, characterized in that: The adjusting structure includes a second screw rod, one end of which is rotatably connected to the sliding seat, and the first side plates on both sides of the mounting frame are provided with threaded holes for the second screw rod to pass through and match with the second screw rod, and the other end of the second screw rod is provided with a force-applying seat for driving the second screw rod to rotate; an adjusting groove is provided on the top of the mounting frame, and the sliding seat is located in the adjusting groove, and a horizontal guide rod is fixedly provided in the adjusting groove, and guide holes that are adapted to the guide rod and allow the guide rod to pass through are provided on both sides of the sliding seat, and the guide rod is slidably connected to the guide holes; a horizontal support rod is provided on the base, and a support hole for the first support rod to pass through is provided on the first side plate, and the support rod is slidably connected to the support hole.

6. A pole piece tension adjustment device according to claim 2, characterized in that: The mounting seat is an L-shaped structure, with a second connecting hole penetrating therethrough being provided on the mounting seat, and a third connecting hole being provided on the slider, and bolts passing through the second connecting hole and the third connecting hole fix the mounting seat to the slider; a semicircular mounting groove is provided on the stepped surface of the mounting seat, and the spherical bearings at both ends of the roller are located in the mounting groove, a pressure block is provided above the stepped surface of the mounting seat, and a semicircular groove matching the mounting groove is provided on the lower surface of the pressure block, and a fixing hole is provided on the mounting seat, and the pressure block is fixedly connected to the mounting seat through bolts and the fixing hole.

7. A pole piece tension adjustment device according to claim 3, characterized in that: The power structure includes a first gear, which is fixedly arranged on the top of the first screw rod. The first gear is meshed with a second gear fixedly arranged on the rotating shaft. The bottom end of the rotating shaft is located in a second mounting hole arranged on the top of the slide seat. The rotating shaft is rotatably connected to the second mounting hole. A hexagonal groove is arranged on the top of the rotating shaft to facilitate driving the rotating shaft to rotate. The diameter of the first gear is greater than the diameter of the second gear.

8. A pole piece tension adjustment device according to claim 1, characterized in that: The height adjustment mechanism includes a sliding rod, which is vertically arranged on the top of the mounting frame, a sliding hole for the sliding rod to pass through is arranged on the fixing frame, the sliding rod is slidably connected to the sliding hole, a limiting plate is arranged on the top of the sliding rod to prevent the sliding rod from slipping off the fixing frame, a spring is arranged between the mounting frame and the fixing frame, and the spring sleeve is arranged on the outside of the sliding rod; and a positioning structure for positioning the mounting frame is arranged on the second side plates at both ends of the fixing frame.

9. A pole piece tension adjustment device according to claim 8, characterized in that: The positioning structure includes a positioning plate, a second side plate is provided with a vertical limit groove, a positioning plate is provided with a protrusion adapted to the limit groove, the protrusion is located in the limit groove and is slidably connected to the limit groove; anti-slip grooves are provided on both sides of the limit groove, and the positioning plate is provided with a locking screw for locking the positioning plate and the second side plate, and the locking screw is tightened in the anti-slip groove; the first side plates arranged at both ends of the mounting frame are provided with a limit block adapted to the limit groove, the limit block is located in the limit groove and is slidably connected to the limit groove.

10. A tension adjustment method based on a pole piece tension adjustment device according to any one of claims 1 to 9, characterized in that: The following steps are involved: S1. The force-applying seat is rotated by a wrench, and the force-applying seat drives the second screw to rotate. The second screw engages with the threaded hole on the first side plate, and the second screw rotates and slides on the first side plate. The second screw drives the slide to slide in the adjustment groove to adjust the distance between the two mounting seats; S2. Install spherical bearings at both ends of the roller, place the spherical bearings in the mounting grooves of the mounting seat, place a pressing block above the mounting seat, the spherical bearings are located in the semicircular groove at the bottom of the pressing block, and lock the pressing block and the mounting seat with bolts; S3, the rotating shaft is driven to rotate through the wrench and the hexagonal groove on the rotating shaft, the rotating shaft drives the first gear to rotate through the second gear, the first gear drives the first screw to rotate, the first screw drives the slider to slide up and down, the slider drives one end of the roller to slide up and down through the mounting seat and the pressure block to adjust the inclination angle of the roller; S4. During the winding process of the pole piece, the spring provides an upward pulling force for the mounting frame, and the mounting frame provides tension to the pole piece through the roller to keep the pole piece taut; the positioning plate limits the mounting frame through the limit block to maintain the tension of the pole piece.

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