A high-precision battery foil slitting device

Abstract

A high-precision battery foil special slitting device, including tool holder, motor, motor pulley, knife shaft, bearing, knife shaft pulley, blade gland, blade, end gland and locking nut; motor is arranged in the outside of each side tool holder; motor pulley is arranged in the inside of each side tool holder; knife shaft is rotatably arranged with tool holder through bearing; knife shaft pulley rotates coaxially with knife shaft; synchronous belt is wrapped in each side knife shaft pulley and motor pulley respectively; blade gland is arranged at the end of knife shaft, blade gland is fixed with knife shaft through bolt, and blade is fixed by pressing together with knife shaft through blade gland; end gland is fitted on the outside of one end of knife shaft; locking nut is fitted on the outside of knife shaft, and locking nut is fixed by pressing together end gland. The motor, knife shaft, blade gland and other structures and installation mode of the application are optimized, and the locking mode of the knife shaft is designed, the slitting device runs stably, reduces the width of the strip, saves the aluminum foil material, the yield is high, and the production cost is low.

Description

Technical Field

[0001] The invention relates to the field of aluminum processing, in particular to a high-precision battery foil special slitting device. Background Art

[0002] China's vigorous development of new energy industries has led to an increasing demand for aluminum foil specifically designed for lithium batteries. A crucial step in battery foil production is slitting the wide aluminum foil from the rolling mill into rolls of desired width. This is then followed by coating, punching, lamination, and packaging to produce lithium batteries. Slitting is the final step in battery foil production, and its quality directly impacts the quality of the finished product. Reducing the width of the strips during slitting can significantly reduce production costs.

[0003] In the original battery foil slitting device, the two knife shafts are driven by motors on both sides to rotate to carry out the battery foil slitting process. Affected by the structural settings of the motors, knife shafts, etc., the minimum setting width of the slitting blades on both sides of the slitting machine is only 78.4mm, and a lot of waste is produced after slitting. It is now necessary to structurally design the slitting device so that the knife shafts can be in a stable rotation state and the battery foil slitting width can be controlled so that the slitting blades on both sides have the narrowest setting width, thereby reducing the waste produced. Summary of the Invention

[0004] In order to solve the above-mentioned problems, the present invention discloses a high-precision battery foil slitting device, and its specific technical solution is as follows: A high-precision battery foil slitting device comprises a knife seat, a motor, a motor pulley, a synchronous belt, a knife shaft, a bearing, a knife shaft pulley, a blade gland, a blade, an end gland and a locking nut;

[0005] The knife seat is arranged on two sides facing each other, and the motor is arranged on the outside of the knife seat on each side. The end face of the motor on each side is embedded in the knife seat and fixed to the knife seat by fasteners; the motor pulley is arranged on the inner side of the knife seat on each side, and is arranged on both sides opposite to each other. The rotating shaft of the motor on each side passes through the corresponding motor pulley and is axially positioned with the rotating shaft of the motor through fasteners, and the motor pulley rotates coaxially with the corresponding motor; the knife shaft is arranged at the end of the knife seat on each side, each knife shaft passes through the knife seat, and the knife shaft is rotatable with the knife seat through a bearing; the knife shaft pulley is arranged at one end of the knife shaft , and is arranged on the inner side of the knife seat, the knife shaft pulley is sleeved on the outer side of the knife shaft, and is axially positioned with the knife shaft through a fastener, and the knife shaft pulley rotates coaxially with the knife shaft; the synchronous belt is respectively wrapped around the knife shaft pulley and the motor pulley on each side, so that the motor drives the knife shaft to rotate; the blade pressure cover is arranged at the end of the knife shaft, the blade pressure cover is fixed to the knife shaft by a bolt, and the blade is pressed on the knife shaft and fixed by the blade pressure cover; the end pressure cover is sleeved on the outside of one end of the knife shaft and is embedded in one side of the knife seat for fixation; the locking nut is sleeved on the outside of the knife shaft and fixed to the knife shaft.

[0006] Furthermore, the motors on both sides are arranged opposite to each other.

[0007] Furthermore, the diameter of the motor pulley on each side is adapted to the diameter of the cutter shaft pulley on each side.

[0008] Furthermore, the knife shaft is divided into a pressing section, a rotating section, a positioning section, a locking section and a tail end; the pressing section is arranged at one end of the rotating section and is an integral structure with the rotating section, and the diameter of the pressing section is larger than the diameter of the rotating section; the center of the end face of the pressing section is a blind hole structure, forming a knife shaft assembly hole, and the knife shaft assembly hole is internally threaded; the positioning section is arranged at one end of the rotating section and is an integral structure with the rotating section, and the diameter of the positioning section is smaller than the diameter of the rotating section; the locking section is arranged at one end of the positioning section and is an integral structure with the positioning section, and the diameter of the locking section is smaller than the diameter of the positioning section; the tail end is arranged at the end of the locking section.

[0009] Furthermore, the number of the bearings provided on each side of the tool holder is two, and the bearings on both sides are axially positioned by a limiting cylinder.

[0010] Furthermore, the knife shaft pulley is arranged at one end of the rotating section and at one side of the pressing section, and one end of the knife shaft pulley is pressed against the inner side of one end of the bearing on one side.

[0011] Furthermore, one end of the cutter shaft is in a raised structure, forming a cutter shaft convex ring. The cutter shaft convex ring is fixed to the end face of the cutter shaft and is an integrated structure. The cutter shaft convex ring and the cutter shaft are coaxially arranged. The inner diameter of the blade is adapted to the inner diameter of the cutter shaft convex ring, and the blade is fitted with the outer ring of the cutter shaft convex ring to achieve diameter positioning of the blade and the cutter shaft.

[0012] Furthermore, the blade pressure cover is a disc-shaped structure, and the end face of the blade pressure cover is a planar structure; the outer circumference of the end face of one side of the blade pressure cover is groove-shaped, forming a blade pressure cover slot, and the blade pressure cover slot is a circular ring structure, and the knife shaft convex ring is embedded in the blade pressure cover slot, and the blade pressure cover and the end face of the knife shaft are engaged and limited; the center of the end face of one side of the blade pressure cover is countersunk, forming a blade pressure cover assembly hole, and one side wall of the blade pressure cover assembly hole is sloped; the fastener adopts a pressure cover assembly bolt, and the pressure cover assembly bolt extends into the blade pressure cover assembly hole and the knife shaft assembly hole and is threadedly connected, so that the blade pressure cover is pressed on the end face of the pressing section.

[0013] Furthermore, one end side wall of the end pressure cover is embedded in the tool holder and has an interference fit with the tool holder. The end of the tool holder is in contact with the outer side of the bearing on one side, and one side of the end pressure cover is fixed to the end of the tool holder by bolts.

[0014] Furthermore, a positioning ring is provided at the end of the knife shaft, and the positioning ring has a circular ring structure. The positioning ring is fitted on the outer side of the positioning section, and the end face of the positioning ring is fitted against the inner side of the bearing on one side; a pressing piece is also provided on one side of the positioning ring, and the pressing piece is fitted on the outer side of the locking section, and the pressing piece is fitted against the end face of the positioning ring; the outer circumference of the locking section is in the shape of an external thread, and the locking section is threadedly connected to the locking nut through a thread, and the locking nut presses the pressing piece and the positioning ring to achieve fixation.

[0015] Furthermore, the pressing piece is in a circular ring structure, and the outer ring of the pressing piece is in a bent structure in the circumferential direction and is bent toward one side of the locking nut.

[0016] The beneficial effects of the present invention are:

[0017] The present invention re-arranges the arrangement of the knife seat, motor, motor pulley, knife shaft pulley and synchronous belt. The motors on both sides are relatively arranged at the outer ends of the two sides of the knife seat, and the motor pulley and the knife shaft pulley are rotated in conjunction with the inner side of the knife seat. The original transmission mode is changed, so that the obstruction of the original motor structure is avoided between the knife seats on both sides, and the blades on both sides can have a smaller arrangement spacing; at the same time, the knife shaft pulley is arranged on the side close to the blade, and when the knife shaft is driven to rotate by synchronous drive, the blade has higher cutting stability. The device of the present invention can achieve a narrower strip drawing width. Compared with the original structure, it greatly saves aluminum foil materials when slitting and drawing strips, reduces production costs, has good stability in the slitting process, and improves the yield rate.

[0018] The present invention is designed for the end assembly method of the blade pressure cover and the blade shaft. One side of the blade pressure cover is designed as a card groove structure, and cooperates with the convex ring structure at the end of the blade shaft to achieve card connection and limitation between the blade pressure cover and the blade shaft. Compared with the original blade pressure cover assembly method, the existing assembly method has a larger contact area for the blade pressure cover, a stronger locking force, and a stronger clamping force of the blade pressure cover and the blade shaft on the blade; at the same time, the center of one side of the blade pressure cover is designed as a countersunk hole structure, and when the bolt structure is used to transversely lock the blade pressure cover, the bolt can be sunk into the blade shaft for assembly, reducing the size of the assembly structure of the blade shaft, and allowing the blades on both sides to have a narrower setting interval, further reducing the width of the aluminum foil strip, and achieving the narrowest aluminum foil strip width of 9mm.

[0019] The present invention redesigns the structure of the cutter shaft, and designs the end of the cutter shaft with a positioning ring, a pressing piece and a locking nut. The outer wall surface of the cutter shaft is circumferentially threaded through the locking nut, and the pressing piece and the positioning ring are laterally abutted and axially positioned with the bearing. Compared with the original slitting structure that fails to effectively limit the cutter shaft axially, the slitting device of the present invention can effectively keep the cutter shaft stably positioned and rotated in the cutter seat, prevent the cutter shaft from axially displacing in the cutter seat, improve the stability of the blade during cutting operation, and the cutter shaft and blade are in a stable rotating state to carry out the process flow. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is an overall cross-sectional schematic diagram of the present invention.

[0021] Figure 2 It is an overall cross-sectional schematic diagram of the original cutting structure.

[0022] Figure 3 It is a schematic diagram of the partial assembly of the blade cover and the blade shaft of the present invention.

[0023] Figure 4 It is a schematic diagram of the partial assembly of the locking portion between the knife shaft and the knife seat of the present invention.

[0024] Figure 5 It is a structural schematic diagram of the knife shaft of the present invention.

[0025] Figure 6 It is a schematic cross-sectional view of the blade gland of the present invention.

[0026] List of reference numerals:

[0027] Knife holder 1;

[0028] Motor 2;

[0029] Motor pulley 3;

[0030] Timing belt 4;

[0031] Knife axis 5;

[0032] Pressing section 5-1, rotating section 5-2, positioning section 5-3, locking section 5-4, tail end 5-5, knife shaft assembly hole 5-6, knife shaft convex ring 5-7;

[0033] Bearing 6;

[0034] Knife shaft pulley 7;

[0035] Blade cover 8;

[0036] Blade cover slot 8-1, blade cover assembly hole 8-2;

[0037] Blade 9;

[0038] End gland 10;

[0039] Lock nut 11;

[0040] Limiting cylinder 12;

[0041] Fastener 13;

[0042] Gland assembly bolt 13-1;

[0043] Positioning ring 14;

[0044] Pressing piece 15. DETAILED DESCRIPTION

[0045] To make the technical solution of the present invention clearer and more specific, the present invention is further described below with reference to the accompanying drawings. Any equivalent replacement of the technical features of the technical solution of the present invention and any solution derived from conventional reasoning shall fall within the scope of protection of the present invention. The fixed connection, fixed arrangement, and fixed structure mentioned in this embodiment are all well-known technologies known to those skilled in the art, such as gluing, welding, screw connection, bolt and nut connection, and riveting.

[0046] As can be seen from the accompanying drawings, a high-precision battery foil slitting device includes a knife seat 1, a motor 2, a motor pulley 3, a synchronous belt 4, a knife shaft 5, a bearing 6, a knife shaft pulley 7, a blade pressure cover 8, a blade 9, an end pressure cover 10 and a locking nut 11;

[0047] The knife seat 1 is arranged with two sides facing each other, and the motor 2 is arranged on the outside of the knife seat 1 on each side. The end face of the motor 2 on each side is embedded in the knife seat 1 and fixed to the knife seat 1 by a fastener 13; the motor pulley 3 is arranged on the inner side of the knife seat 1 on each side, and is arranged opposite to each other on both sides. The rotating shaft of the motor 2 on each side passes through the corresponding motor pulley 3 and is axially positioned with the rotating shaft of the motor 2 by the fastener 13. The motor pulley 3 rotates coaxially with the corresponding motor 2; the knife shaft 5 is arranged at the end of the knife seat 1 on each side, and each knife shaft 5 passes through the knife seat 1. The knife shaft 5 is rotatable with the knife seat 1 through a bearing 6; the knife shaft pulley 7 is arranged at one end of the knife shaft 5. It is arranged on the inner side of the knife seat 1, the knife shaft pulley 7 is fitted on the outer side of the knife shaft 5, and is axially positioned with the knife shaft 5 by the fastener 13, and the knife shaft pulley 7 rotates coaxially with the knife shaft 5; the synchronous belt 4 is respectively wrapped around the knife shaft pulley 7 and the motor pulley 3 on each side, so that the motor 2 drives the knife shaft 5 to rotate; the blade pressure cover 8 is arranged at the end of the knife shaft 5, and the blade pressure cover 8 is fixed to the knife shaft 5 by bolts, and the blade 9 is pressed on the knife shaft 5 by the blade pressure cover 8 and fixed; the end pressure cover 10 is fitted on the outside of one end of the knife shaft 5, and is embedded in one side of the knife seat 1 for fixation; the locking nut 11 is fitted on the outside of the knife shaft 5 and fixed to the knife shaft 5.

[0048] Furthermore, the motors 2 on both sides are arranged opposite to each other.

[0049] Furthermore, the diameter of the motor pulley 3 on each side is adapted to the diameter of the cutter shaft pulley 7 on each side.

[0050] Furthermore, the knife shaft 5 is divided into a pressing section 5-1, a rotating section 5-2, a positioning section 5-3, a locking section 5-4 and a tail end 5-5; the pressing section 5-1 is arranged at one end of the rotating section 5-2, and is an integral structure with the rotating section 5-2, and the diameter of the pressing section 5-1 is larger than the diameter of the rotating section 5-2; the center of the end face of the pressing section 5-1 is a blind hole structure, forming a knife shaft assembly hole 5-6, and the knife shaft assembly hole 5-6 is an internal thread; the positioning section 5-3 is arranged at one end of the rotating section 5-2, and is an integral structure with the rotating section 5-2, and the diameter of the positioning section 5-3 is smaller than the diameter of the rotating section 5-2; the locking section 5-4 is arranged at one end of the positioning section 5-3, and is an integral structure with the positioning section 5-3, and the diameter of the locking section 5-4 is smaller than the diameter of the positioning section 5-3; the tail end 5-5 is arranged at the end of the locking section 5-4.

[0051] Furthermore, the number of the bearings 6 provided on each side of the tool holder 1 is two, and the bearings 6 on both sides are axially positioned by a limiting cylinder 12 .

[0052] Furthermore, the knife shaft pulley 7 is arranged at one end of the rotating section 5 - 2 and at one side of the pressing section 5 - 1 , and one end of the knife shaft pulley 7 abuts against the inner side of one end of the bearing 6 on one side.

[0053] Furthermore, one end of the cutter shaft 5 is in a raised structure, forming a cutter shaft convex ring 5-7, and the cutter shaft convex ring 5-7 is fixed to the end face of the cutter shaft 5 to form an integrated structure, and the cutter shaft convex ring 5-7 is coaxially arranged with the cutter shaft 5; the inner diameter of the blade 9 is adapted to the inner diameter of the cutter shaft convex ring 5-7, and the blade 9 is fitted with the outer ring of the cutter shaft convex ring 5-7 to realize the positioning of the blade 9 and the cutter shaft 5.

[0054] Furthermore, the blade pressure cover 8 is a disc-shaped structure, and the end face of the blade pressure cover 8 is a planar structure; the outer side of the end face of one side of the blade pressure cover 8 is circumferentially grooved to form a blade pressure cover slot 8-1, and the blade pressure cover slot 8-1 is a circular ring structure, and the knife shaft convex ring 5-7 is embedded in the blade pressure cover slot 8-1, and the blade pressure cover 8 is engaged with the end face of the knife shaft 5 to limit the position; the center of the end face of one side of the blade pressure cover 8 is countersunk to form a blade pressure cover assembly hole 8-2, and the side wall of the blade pressure cover assembly hole 8-2 is sloped; the fastener 13 adopts a pressure cover assembly bolt 13-1, and the pressure cover assembly bolt 13-1 extends into the blade pressure cover assembly hole 8-2 and the knife shaft assembly hole 5-6 and is threadedly connected to realize the pressing of the blade pressure cover 8 on the end face of the pressing section 5-1.

[0055] Furthermore, one end side wall of the end pressure cover 10 is embedded in the tool holder 1 and has an interference fit with the tool holder 1. The end of the tool holder 1 is in contact with the outer side of the bearing 6 on one side. One side of the end pressure cover 10 is fixed to the end of the tool holder 1 by bolts.

[0056] Furthermore, a positioning ring 14 is provided at the end of the knife shaft 5. The positioning ring 14 has a circular ring structure. The positioning ring 14 is fitted on the outer side of the positioning section 5-3, and the end face of the positioning ring 14 is fitted against the inner side of the bearing 6 on one side; a pressing piece 15 is also provided on one side of the positioning ring 14. The pressing piece 15 is fitted on the outer side of the locking section 5-4, and the pressing piece 15 is fitted against the end face of the positioning ring 14; the outer circumference of the locking section 5-4 is in the shape of an external thread, and the locking section 5-4 is threadedly connected to the locking nut 11 through a thread, and the locking nut 11 presses the pressing piece 15 and the positioning ring 14 to achieve fixation.

[0057] Furthermore, the compression piece 15 is in a circular ring structure, and the outer ring of the compression piece 15 is in a bent structure in the circumferential direction and is bent toward one side of the locking nut 11 .

[0058] The structural principle of the present invention is:

[0059] After the locking nut is assembled with the cutter shaft, the pressing piece and the positioning ring are fixed to one side of the bearing, and the cutter shaft is laterally limited to one end of the cutter seat and is axially limited; the blade pressure cover is buckled on the end of the cutter shaft, and the cutter shaft convex ring is embedded in the blade pressure cover slot, and the blade pressure cover is pressed together with the blade and the cutter shaft through the pressure cover assembly bolts; the starting motor drives the motor pulley to rotate, and the electric belt drives the cutter shaft pulley to rotate through the synchronous belt, and the cutter shaft rotates in the cutter seat.

[0060] The beneficial effects of the present invention are:

[0061] The present invention re-arranges the arrangement of the knife seat, motor, motor pulley, knife shaft pulley and synchronous belt. The motors on both sides are relatively arranged at the outer ends of the two sides of the knife seat, and the motor pulley and the knife shaft pulley are rotated in conjunction with the inner side of the knife seat. The original transmission mode is changed, so that the obstruction of the original motor structure is avoided between the knife seats on both sides, and the blades on both sides can have a smaller arrangement spacing; at the same time, the knife shaft pulley is arranged on the side close to the blade, and when the knife shaft is driven to rotate by synchronous drive, the blade has higher cutting stability. The device of the present invention can achieve a narrower strip drawing width. Compared with the original structure, it greatly saves aluminum foil materials when slitting and drawing strips, reduces production costs, has good stability in the slitting process, and improves the yield rate.

[0062] The present invention is designed for the end assembly method of the blade pressure cover and the blade shaft. One side of the blade pressure cover is designed as a card groove structure, and cooperates with the convex ring structure at the end of the blade shaft to achieve card connection and limitation between the blade pressure cover and the blade shaft. Compared with the original blade pressure cover assembly method, the existing assembly method has a larger contact area for the blade pressure cover, a stronger locking force, and a stronger clamping force of the blade pressure cover and the blade shaft on the blade; at the same time, the center of one side of the blade pressure cover is designed as a countersunk hole structure, and when the bolt structure is used to transversely lock the blade pressure cover, the bolt can be sunk into the blade shaft for assembly, reducing the size of the assembly structure of the blade shaft, and allowing the blades on both sides to have a narrower setting interval, further reducing the width of the aluminum foil strip, and achieving the narrowest aluminum foil strip width of 9mm.

[0063] The present invention redesigns the structure of the cutter shaft, and designs the end of the cutter shaft with a positioning ring, a pressing piece and a locking nut. The outer wall surface of the cutter shaft is circumferentially threaded through the locking nut, and the pressing piece and the positioning ring are laterally abutted and axially positioned with the bearing. Compared with the original slitting structure that fails to effectively limit the cutter shaft axially, the slitting device of the present invention can effectively keep the cutter shaft stably positioned and rotated in the cutter seat, prevent the cutter shaft from axially displacing in the cutter seat, improve the stability of the blade during cutting operation, and the cutter shaft and blade are in a stable rotating state to carry out the process flow.

Claims

1. A high-precision battery foil slitting device, comprising a knife seat (1), a motor (2), a motor pulley (3), a synchronous belt (4), a knife shaft (5), a bearing (6), a knife shaft pulley (7), a blade pressure cover (8), a blade (9), an end pressure cover (10) and a locking nut (11); It is characterized by: The knife seat (1) is arranged on two sides facing each other, the motor (2) is arranged on the outside of the knife seat (1) on each side, the end face of the motor (2) on each side is embedded in the knife seat (1), and is fixed to the knife seat (1) by a fastener (13); the motor pulley (3) is arranged on the inside of the knife seat (1) on each side, and is arranged opposite to each other on both sides, the rotating shaft of the motor (2) on each side passes through the corresponding motor pulley (3), and is axially positioned with the rotating shaft of the motor (2) by a fastener (13), and the motor pulley (3) rotates coaxially with the corresponding motor (2); the knife shaft (5) is arranged at the end of the knife seat (1) on each side, each knife shaft (5) passes through the knife seat (1), and the knife shaft (5) is rotatable with the knife seat (1) through a bearing (6); the knife shaft pulley (7) is arranged at one end of the knife shaft (5), and The blade cover (8) is provided on the inner side of the blade seat (1), the blade shaft pulley (7) is fitted on the outer side of the blade shaft (5), and is axially positioned with the blade shaft (5) through a fastener (13), and the blade shaft pulley (7) rotates coaxially with the blade shaft (5); the synchronous belt (4) is respectively wrapped around the blade shaft pulley (7) and the motor pulley (3) on each side, so that the motor (2) drives the blade shaft (5) to rotate; the blade cover (8) is provided at the end of the blade shaft (5), the blade cover (8) is fixed to the blade shaft (5) by a bolt, and the blade (9) is pressed on the blade shaft (5) by the blade cover (8) and fixed; the end cover (10) is fitted on the outer side of one end of the blade shaft (5) and is embedded in one side of the blade seat (1) for fixing; the locking nut (11) is fitted on the outer side of the blade shaft (5) and fixed to the blade shaft (5); The knife shaft (5) is divided into a pressing section (5-1), a rotating section (5-2), a positioning section (5-3), a locking section (5-4) and a tail end (5-5); the pressing section (5-1) is arranged at one end of the rotating section (5-2) and forms an integrated structure with the rotating section (5-2); the diameter of the pressing section (5-1) is larger than the diameter of the rotating section (5-2); the center of the end face of the pressing section (5-1) is a blind hole structure, forming a knife shaft assembly hole (5-6), and the knife shaft assembly hole (5-6) is internally threaded. The positioning section (5-3) is arranged at one end of the rotating section (5-2) and forms an integral structure with the rotating section (5-2), and the diameter of the positioning section (5-3) is smaller than the diameter of the rotating section (5-2); the locking section (5-4) is arranged at one end of the positioning section (5-3) and forms an integral structure with the positioning section (5-3), and the diameter of the locking section (5-4) is smaller than the diameter of the positioning section (5-3); the tail end (5-5) is arranged at the end of the locking section (5-4); The blade pressure cover (8) is in a disc-shaped structure, and the end face of the blade pressure cover (8) is in a plane structure; the outer side of the end face of one side of the blade pressure cover (8) is in a groove shape in the circumferential direction, forming a blade pressure cover card slot (8-1); the blade pressure cover card slot (8-1) is in a circular ring structure, and the blade shaft convex ring (5-7) is embedded in the blade pressure cover card slot (8-1), and the blade pressure cover (8) and the end face of the blade shaft (5) are engaged and limited; the blade pressure cover (8) The center of one side end face is in a countersunk shape, forming a blade pressure cover assembly hole (8-2), and one side wall of the blade pressure cover assembly hole (8-2) is in a slope shape; the fastener (13) adopts a pressure cover assembly bolt (13-1), and the pressure cover assembly bolt (13-1) extends into the blade pressure cover assembly hole (8-2) and the knife shaft assembly hole (5-6) to be threadedly connected, so that the blade pressure cover (8) is pressed on the end face of the pressing section (5-1).

2. A high-precision battery foil slitting device according to claim 1, characterized in that: The diameter of the motor pulley (3) on each side is adapted to the diameter of the knife shaft pulley (7) on each side.

3. The high-precision battery foil slitting device according to claim 1, characterized in that: The number of the bearings (6) provided on each side of the knife seat (1) is two, and the bearings (6) on both sides are axially positioned by a limiting cylinder (12).

4. The high-precision battery foil slitting device according to claim 1, characterized in that: The knife shaft pulley (7) is arranged at one end of the rotating section (5-2) and at one side of the pressing section (5-1), and one end of the knife shaft pulley (7) is pressed against the inner side of one end of the bearing (6) on one side.

5. The high-precision battery foil slitting device according to claim 1, characterized in that: One end of the cutter shaft (5) is in a convex structure, forming a cutter shaft convex ring (5-7), the cutter shaft convex ring (5-7) is fixedly arranged with the end face of the cutter shaft (5), forming an integrated structure, and the cutter shaft convex ring (5-7) and the cutter shaft (5) are coaxially arranged; the inner diameter of the blade (9) is adapted to the inner diameter of the cutter shaft convex ring (5-7), and the blade (9) is fitted with the outer ring of the cutter shaft convex ring (5-7) to achieve positioning of the blade (9) and the cutter shaft (5).

6. The high-precision battery foil slitting device according to claim 1, characterized in that: One end side wall of the end pressure cover (10) is embedded in the knife seat (1) and is interference fit with the knife seat (1). The end of the knife seat (1) is in contact with the outer side of the bearing (6) on one side. One side of the end pressure cover (10) is fixed to the end of the knife seat (1) by bolts.

7. The high-precision battery foil slitting device according to claim 1, characterized in that: The end of the knife shaft (5) is also provided with a positioning ring (14), which is a circular ring structure, and is fitted on the outer side of the positioning section (5-3), and the end face of the positioning ring (14) is fitted on the inner side of the bearing (6) on one side; one side of the positioning ring (14) is also provided with a pressing piece (15), and the pressing piece (15) is fitted on the outer side of the locking section (5-4), and the pressing piece (15) is fitted on the end face of the positioning ring (14); the outer circumference of the locking section (5-4) is in the shape of an external thread, and the locking section (5-4) is threadedly connected to the locking nut (11) through a thread, and the locking nut (11) presses the pressing piece (15) and the positioning ring (14) to achieve fixation.

8. The high-precision battery foil slitting device according to claim 7, characterized in that: The pressing piece (15) is in a circular ring structure, and the outer ring of the pressing piece (15) is in a bent structure in the circumferential direction and is bent toward one side of the locking nut (11).

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