A lithium battery copper foil cutting device for electric vehicles

Abstract

The application belongs to the technical field of lithium battery production, and particularly relates to a lithium battery copper foil cutting device for electric vehicles, which comprises a bottom plate, two vertical plates fixedly connected to the top surface of the bottom plate, the two vertical plates being vertically and parallel arranged and respectively located at the two sides of the vertical plate, a copper foil rotationally connected between the two vertical plates, the copper foil sequentially passing through a feeding mechanism and a flattening mechanism and winding around a winding roller, a cutting assembly arranged above the copper foil, the cutting assembly being located between the feeding mechanism and the flattening mechanism, the flattening mechanism comprising two installation rollers rotationally connected between the two vertical plates, the two installation rollers being arranged in an up-down mode, a plurality of ultrasonic generators fixedly connected to the inner side wall of the installation roller in a circumferential and equidistant mode, the ultrasonic generators being located at the middle of the installation roller, and a pulse current conduction assembly arranged on the outer side wall of the installation roller, the copper foil passing between the two installation rollers, and the top surface and the bottom surface of the copper foil being respectively in electrical contact with the two pulse current conduction assemblies. The application flattens the cutting part of the copper foil after the cutting of the copper foil is completed.

Description

Technical Field

[0001] This invention belongs to the field of lithium battery production technology, and in particular relates to a copper foil cutting device for lithium batteries used in electric vehicles. Background Technology

[0002] Electrolytic copper foil is an important material in the manufacture of copper-clad laminates (CCLs), printed circuit boards (PCBs), and lithium-ion batteries. In today's rapidly developing electronics and information industry, electrolytic copper foil is referred to as the "neural network" for signal and power transmission and communication in electronic products.

[0003] Before copper foil can be used, it needs to be cut. When cutting copper foil, the outer edge of the cut copper foil usually has wrinkles, which affects the cutting quality and the winding of the copper foil. Therefore, there is an urgent need for a copper foil cutting device for lithium batteries in electric vehicles. Summary of the Invention

[0004] The purpose of this invention is to provide a copper foil cutting device for lithium batteries used in electric vehicles to solve the above-mentioned problems.

[0005] To achieve the above objectives, the present invention provides the following solution:

[0006] A copper foil cutting device for lithium batteries in electric vehicles includes a base plate, two vertical plates fixedly attached to the top surface of the base plate, the two vertical plates being vertically parallel and located on both sides of the base plate respectively, a copper foil being rotatably connected between the two vertical plates, the copper foil passing through a feeding mechanism and a flattening mechanism in sequence and being wound around a take-up roller, and a cutting assembly being disposed above the copper foil, the cutting assembly being located between the feeding mechanism and the flattening mechanism;

[0007] The flattening mechanism includes two mounting rollers rotatably connected between the two vertical plates. The two mounting rollers are arranged vertically. A plurality of ultrasonic generators are fixedly connected to the inner sidewall of the mounting rollers at equal intervals in the circumferential direction. The ultrasonic generators are located in the middle of the mounting rollers. A pulse current conduction component is provided on the outer sidewall of the mounting rollers.

[0008] The copper foil passes between the two mounting rollers, and the top and bottom surfaces of the copper foil are in electrical contact with the two pulse current conduction components, respectively.

[0009] Preferably, both ends of the mounting roller are coaxially fixed with short shafts, the axis of the short shafts is perpendicular to the vertical plate and rotatably connected to the vertical plate, the pulse current conduction assembly includes a conductive connecting ring sleeved on the outer wall of the short shaft, a conductive slip ring is fixed to the outer side of the conductive connecting ring, the conductive slip ring is electrically connected to a pulse current generating device, the conductive connecting ring is electrically connected to a conductive outer shell, and the conductive outer shell is coaxially fixed to the outer wall of the mounting roller.

[0010] Preferably, the feeding mechanism includes two first conveying rollers rotatably connected between the two vertical plates. The two first conveying rollers are horizontally and parallel, and a first conveyor belt is fitted on the two first conveying rollers. The axis of the first conveying rollers is parallel to the axis of the mounting roller. The two first conveying rollers are connected by a chain drive. Each of the first conveying rollers is connected to an upper conveying motor via a chain drive. The upper conveying motor is located above the first conveyor belt and is fixed to the bottom surface of a support plate. The support plate is fixed to the side wall of the vertical plate. A second conveyor belt is arranged below the first conveyor belt. The second conveyor belt is fitted on two second conveying rollers. The two second conveying rollers are horizontal and parallel, and the axis of the second conveying rollers is parallel to the axis of the first conveying rollers. The copper foil passes between the second conveyor belt and the first conveyor belt, and the top and bottom surfaces of the copper foil are in frictional contact with the first conveyor belt and the second conveyor belt, respectively.

[0011] Preferably, an electric telescopic rod is fixedly connected to the top surface of the base plate, a bracket is fixedly connected to the top end of the electric telescopic rod, two second conveying rollers are rotatably connected to the top end of the bracket, a lower conveying motor is fixedly connected inside the bracket, the lower conveying motor is chain-driven connected to either of the second conveying rollers, and the two second conveying rollers are connected by chain drive.

[0012] The bottom end of the bracket has two sliding holes, and each of the two sliding holes is slidably connected to a vertically arranged sliding rod. The top end of the sliding rod extends into the bracket and is fixedly connected to a limit block. The bottom end of the sliding rod is fixedly connected to the top surface of the base plate. The two sliding rods are respectively located on both sides of the electric telescopic rod.

[0013] Preferably, a support rod is fixedly connected between the two upright plates. The axis of the support rod is perpendicular to the side wall of the upright plate. A slip ring is slidably connected to the outer side wall of the support rod. A through bolt hole is opened on the outer side wall of the slip ring. A first bolt is threaded into the bolt hole. One end of the first bolt, which passes through the slip ring, abuts against the support rod. A slider is fixedly connected to the inner side wall of the slip ring. The slider is slidably connected in a groove. The groove is opened on the outer side wall of the support rod and is arranged along the length direction of the support rod.

[0014] The cutting assembly is fixed to the bottom end of the slip ring.

[0015] Preferably, the bottom surface of the copper foil is slidably in contact with an auxiliary plate, the auxiliary plate is fixed between the two vertical plates, the auxiliary plate is located directly below the cutting assembly, the top surface of the auxiliary plate is flush with the top surface of the second conveyor belt, the end of the auxiliary plate near the second conveyor belt is provided with a chamfer, the chamfer is located on the top surface of the auxiliary plate, and the end of the chamfer away from the auxiliary plate is lower than the top surface of the auxiliary plate.

[0016] Preferably, there are several take-up rollers, which are arranged at equal intervals from top to bottom. Adjacent take-up rollers are connected by belt drive, and any one of the take-up rollers passes through the vertical plate and is connected to a take-up motor by chain drive.

[0017] Preferably, one end of the upright plate has a horizontally arranged mounting groove, and a bearing is detachably connected in the mounting groove. The two bearings are coaxially arranged and respectively sleeved on both ends of the first rotating shaft. The copper foil is wound around the outer wall of the first rotating shaft.

[0018] Preferably, one end of the upright plate is connected to a fixing plate by screws. A guide tube is fixed to the side of the fixing plate near the upright plate. The guide tube extends into the mounting groove. A top block is slidably connected inside the guide tube. The end of the top block away from the fixing plate protrudes from the fixing plate and abuts against the outer wall of the bearing. A threaded hole is opened at the end of the top block away from the bearing. A second bolt is threaded into the threaded hole. The end of the second bolt away from the top block protrudes from the fixing plate. A rotating plate is coaxially fixed to the outer wall of the second bolt. The rotating plate is rotatably connected inside a support ring. The support ring is fixed to the fixing plate.

[0019] Compared with the prior art, the present invention has the following advantages and technical effects:

[0020] In this invention, the copper foil passes through the feeding mechanism and the flattening mechanism in sequence and is then wound onto the take-up roller. The feeding mechanism feeds the copper foil to the bottom of the cutting assembly. After being cut by the cutting assembly, the copper foil enters the flattening mechanism for flattening and is then wound up by the take-up roller. This ensures the flatness of the edges of the cut copper foil and thus ensures the quality of the cut copper foil.

[0021] Inside the rolling mechanism, ultrasonic waves and pulsed currents are used simultaneously to act on the copper foil, changing the crystal structure of the metal crystals inside the copper foil, thereby rolling the cut copper foil flat. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly described below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is the front view of the present invention;

[0024] Figure 2 for Figure 1 A magnified view of a section at point A in the middle;

[0025] Figure 3 This is a top view of the present invention;

[0026] Figure 4 This is a schematic diagram of the internal structure of the present invention;

[0027] Figure 5 This is a schematic diagram of the mounting roller structure in this invention;

[0028] Figure 6 for Figure 4 A magnified view of a section at point B in the middle;

[0029] Figure 7 for Figure 4 A magnified view of a section at point C;

[0030] The components are as follows: 1. Base plate; 2. Vertical plate; 3. Copper foil; 4. First rotating shaft; 5. Support plate; 6. Support rod; 7. Slip ring; 8. First bolt; 9. First conveyor belt; 10. First conveyor roller; 11. Upper conveyor motor; 12. Bracket; 13. Slide rod; 14. Electric telescopic rod; 15. Lower conveyor motor; 16. Second conveyor roller; 17. Second conveyor belt; 18. Auxiliary plate; 19. Rewinding roller; 20. Short shaft; 21. Conductive housing; 22. Mounting roller; 23. Ultrasonic generator; 24. Conductive slip ring; 25. Bearing; 26. Top block; 27. Guide tube; 28. Fixed plate; 29. ​​Support ring; 30. Second bolt; 31. Rotating plate; 32. Laser cutting machine; 33. Rewinding motor. Detailed Implementation

[0031] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0032] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0033] Reference Figures 1 to 7 The present invention provides a copper foil cutting device for lithium batteries of electric vehicles, including a base plate 1, two vertical plates 2 fixedly connected to the top surface of the base plate 1, the two vertical plates 2 being arranged vertically and parallel and located on both sides of the base plate respectively, and a copper foil 3 being rotatably connected between the two vertical plates 2. The copper foil 3 passes through a feeding mechanism and a flattening mechanism in sequence and is wound on a take-up roller 19. A cutting assembly is arranged above the copper foil 3, and the cutting assembly is located between the feeding mechanism and the flattening mechanism.

[0034] The leveling mechanism includes two mounting rollers 22 rotatably connected between two vertical plates 2. The two mounting rollers 22 are arranged vertically. Several ultrasonic generators 23 are fixedly connected to the inner side wall of the mounting rollers 22 at equal intervals in the circumferential direction. The ultrasonic generators 23 are located in the middle of the mounting rollers 22. A pulse current conduction component is provided on the outer side wall of the mounting rollers 22.

[0035] The copper foil 3 passes between the two mounting rollers 22, and the top and bottom surfaces of the copper foil 3 are in electrical contact with the two pulse current conduction components, respectively.

[0036] The ultrasonic generator 23 consists of three parts: a power supply, an ultrasonic generating part, and an ultrasonic vibration head. The ultrasonic vibration head applies vibration on the inner wall of the mounting roller 22. The amount and position of vibration can be adjusted according to the process.

[0037] In this invention, the copper foil 3 passes through the feeding mechanism and the flattening mechanism in sequence and is then wound around the take-up roller 19. The feeding mechanism feeds the copper foil 3 to the bottom of the cutting assembly. After being cut by the cutting assembly, it enters the flattening mechanism for flattening and is then wound up by the take-up roller 19. This ensures the flatness of the edges of the cut copper foil 3 and thus ensures the quality of the cut copper foil 3.

[0038] Inside the rolling mechanism, the copper foil is simultaneously subjected to ultrasonic waves and pulsed currents to change the grain structure of the metal crystals within the copper foil 3, thereby rolling the cut copper foil 3 flat.

[0039] In a further optimized design, short shafts 20 are coaxially fixed to both ends of the mounting roller 22. The axis of the short shafts 20 is perpendicular to the vertical plate 2 and rotatably connected to it. The pulse current conduction assembly includes a conductive connecting ring sleeved on the outer wall of the short shafts 20. A conductive slip ring 24 is fixed to the outer side of the conductive connecting ring. The conductive slip ring 24 is electrically connected to a pulse current generating device. A conductive housing 21 is electrically connected to the conductive connecting ring. The conductive housing 21 is coaxially fixed to the outer wall of the mounting roller 22. The conductive housing 21 moves synchronously with the mounting roller 22. The pulse current generating device is existing technology and will not be described in detail here. A 24V single pulse current is electrically connected to the conductive slip ring 24. A 2KΩ resistor is connected in series between the conductive slip ring 24 and the single pulse current. Another conductive slip ring 24 is electrically connected to the single pulse power supply, thereby forming a conductive circuit between the two conductive slip rings 24, the two conductive housings 21, the copper foil 3, and the pulse current generating device, thus applying a pulse current to the copper foil 3.

[0040] A pulsed current is applied to the copper foil 3, causing the copper foil 3 to heat up. Under the rolling action of the conductive shell 21, the copper foil 3 undergoes grain elongation, grain refinement, and recrystallization, effectively reducing the residual stress after rolling. At the same time, the electroplastic effect can effectively reduce the deformation resistance of the copper foil 3. Meanwhile, the ultrasonic generator 23 generates ultrasonic waves, which are transmitted to the conductive shell 21 through the mounting roller 22, and then to the copper foil 3, thereby refining the grains and making the metal grains in the copper foil 3 uniformly distributed. Finally, the copper foil 3 is rolled flat under the action of the conductive shell 21.

[0041] The feeding mechanism is further optimized by including two first conveyor rollers 10 rotatably connected between two vertical plates 2. The two first conveyor rollers 10 are horizontally and parallelly arranged, and a first conveyor belt 9 is fitted on the two first conveyor rollers 10. The axis of the first conveyor rollers 10 is parallel to the axis of the mounting roller 22. The two first conveyor rollers 10 are connected by chain drive. Each first conveyor roller 10 is connected to an upper conveyor motor 11 via chain drive. The upper conveyor motor 11 is located above the first conveyor belt 9 and is fixed to the bottom surface of the support plate 5. The support plate 5 is fixed to the side wall of the vertical plate 2. A second conveyor belt 17 is arranged below the first conveyor belt 9. The second conveyor belt 17 is fitted on two second conveyor rollers 16. The two second conveyor rollers 16 are horizontally and parallelly arranged, and the axis of the second conveyor rollers 16 is parallel to the axis of the first conveyor rollers 10. The copper foil 3 passes between the second conveyor belt 17 and the first conveyor belt 9. The top and bottom surfaces of the copper foil 3 are in frictional contact with the first conveyor belt 9 and the second conveyor belt 17, respectively.

[0042] In a further optimized scheme, an electric telescopic rod 14 is fixedly connected to the top surface of the base plate 1, and a bracket 12 is fixedly connected to the top of the electric telescopic rod 14. Two second conveying rollers 16 are rotatably connected to the top of the bracket 12. A lower conveying motor 15 is fixedly connected inside the bracket 12. The lower conveying motor 15 is connected to any of the second conveying rollers 16 by chain drive, and the two second conveying rollers 16 are connected by chain drive.

[0043] The bottom end of the bracket 12 is provided with two sliding holes, and vertically arranged sliding rods 13 are slidably connected to both sliding holes. The top end of the sliding rod 13 extends into the bracket 12 and is fixed to a limit block. The bottom end of the sliding rod 13 is fixed to the top surface of the base plate 1. The two sliding rods 13 are located on both sides of the electric telescopic rod 14.

[0044] A first sprocket is fixedly connected to the output shaft of the upper conveyor motor 11. The first sprocket is connected to a second sprocket via a first chain drive. The second sprocket is coaxially fixed to one end of any of the first conveyor rollers 10, thereby driving the first conveyor rollers 10 to rotate via the upper conveyor motor 11. A third sprocket is also fixedly connected to the end of the first conveyor roller 10. The two third sprockets are connected via a second chain drive, thereby driving the first conveyor belt 9 to move.

[0045] A fourth sprocket is coaxially fixed to the output shaft of the lower conveyor motor 15. The fourth sprocket is connected to a fifth sprocket via a third chain drive. The fifth sprocket is coaxially fixed to the end of any of the second conveyor rollers 16. A sixth sprocket is also fixed to the end of the second conveyor roller 16. The two sixth sprockets are connected by a fourth chain drive. The lower conveyor motor 15 drives any of the second conveyor rollers 16 to rotate, which in turn drives the second conveyor belt 17 to move. The first conveyor belt 9 and the second conveyor belt 17 move synchronously, thereby sending the copper foil 3 below the cutting assembly.

[0046] The height of the second conveyor belt 17 is adjusted by the electric telescopic rod 14, thereby adjusting the distance between the first conveyor belt 9 and the second conveyor belt 17. This arrangement makes it convenient for workers to insert one end of the copper foil 3 between the first conveyor belt 9 and the second conveyor belt 17.

[0047] In a further optimized design, a support rod 6 is fixedly connected between the two upright plates 2. The axis of the support rod 6 is perpendicular to the side wall of the upright plate 2. A slip ring 7 is slidably connected to the outer side wall of the support rod 6. A through bolt hole is opened on the outer side wall of the slip ring 7. A first bolt 8 is threaded into the bolt hole. One end of the first bolt 8, which passes through the slip ring 7, abuts against the support rod 6. A slider is fixedly connected to the inner side wall of the slip ring 7. The slider is slidably connected in a groove. The groove is opened on the outer side wall of the support rod 6 and is set along the length of the support rod 6.

[0048] The cutting assembly is fixed to the bottom end of the slip ring 7.

[0049] The slip ring 7 is slidably connected to the outer wall of the support rod 6. The sliding groove allows the slip ring 7 to slide only along the length of the support rod 6. The first bolt 8 is used to fix the slip ring 7 and prevent it from moving. Multiple slip rings 7 can be used to cut copper foil of various widths at once. The cutting assembly is preferably a laser cutter 32.

[0050] In a further optimized design, the bottom surface of the copper foil 3 is in sliding contact with an auxiliary plate 18, which is fixed between the two vertical plates 2. The auxiliary plate 18 is located directly below the cutting assembly, and the top surface of the auxiliary plate 18 is flush with the top surface of the second conveyor belt 17. A chamfer is provided at one end of the auxiliary plate 18 near the second conveyor belt 17, and the chamfer is located on the top surface of the auxiliary plate 18. The end of the chamfer away from the auxiliary plate 18 is lower than the top surface of the auxiliary plate 18.

[0051] The auxiliary plate 18 is used to support the copper foil 3 and prevent the copper foil 3 from bending during cutting, which would affect the cutting effect. The bottom surface of the auxiliary plate 18 near the second conveyor belt 17 is rounded and the top surface is chamfered to facilitate the copper foil 3 to fall smoothly onto the auxiliary plate 18 after it comes out of the second conveyor belt 17.

[0052] Further optimization of the scheme involves several take-up rollers 19, arranged at equal intervals from top to bottom. Adjacent take-up rollers 19 are connected by belt drive. Each take-up roller 19 extends out of the vertical plate 2 and is connected to a take-up motor 33 via chain drive. Each take-up roller 19 is detachably connected to the end of the vertical plate 2 furthest from the copper foil 3. A seventh sprocket is fixed to one end of each take-up roller 19, and adjacent seventh sprockets are connected by a fifth chain drive. An eighth sprocket is fixed to the end of each take-up roller 19 extending out of the vertical plate 2. The eighth sprocket is connected to a ninth sprocket via a sixth chain drive. The ninth sprocket is fixed to the output shaft of the take-up motor 33, thereby driving the take-up rollers 19 to rotate and take up the cut copper foil.

[0053] To further optimize the design, a horizontally positioned mounting groove is provided at one end of the upright plate 2. A bearing 25 is detachably connected in the mounting groove. The two bearings 25 are coaxially arranged and respectively fitted onto the two ends of the first rotating shaft 4. Copper foil 3 is wrapped around the outer wall of the first rotating shaft 4.

[0054] In a further optimized design, a fixing plate 28 is connected to one end of the upright plate 2 by screws. A guide tube 27 is fixed to the side of the fixing plate 28 near the upright plate 2. The guide tube 27 extends into the mounting groove. A top block 26 is slidably connected inside the guide tube 27. The end of the top block 26 away from the fixing plate 28 protrudes from the fixing plate 28 and abuts against the outer wall of the bearing 25. A threaded hole is opened at the end of the top block 26 away from the bearing 25. A second bolt 30 is threadedly connected inside the threaded hole. The end of the second bolt 30 away from the top block 26 protrudes from the fixing plate 28. A rotating piece 31 is coaxially fixed to the outer wall of the second bolt 30. The rotating piece 31 is rotatably connected inside the support ring 29. The support ring 29 is fixed to the fixing plate 28.

[0055] The mounting slots on the two upright plates 2 are set accordingly. First, the fixing plate 28 is fixed to the upright plate 2 with screws. The guide tube 27 is inserted into the mounting slot. Then, the second bolt 30 is rotated so that the end of the top block 26 extends out of the guide tube 27 and abuts against the outer side wall of the bearing 25, thereby fixing the bearing 25 to the upright plate 2.

[0056] The end of the vertical plate 2 away from the first rotating shaft 4 has several mounting grooves from top to bottom, and the winding roller 19 is mounted on the vertical plate 2 in the same structure.

[0057] In the description of this invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this invention, and are not intended to 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 of this invention.

[0058] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Various modifications and improvements made by those skilled in the art to the technical solutions of the present invention without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.

Claims

1. A copper foil cutting device for lithium batteries in electric vehicles, comprising a base plate (1), wherein two vertical plates (2) are fixedly connected to the top surface of the base plate (1), the two vertical plates (2) are vertically parallel and respectively located on both sides of the base plate (1), characterized in that: A copper foil (3) is rotatably connected between the two upright plates (2). The copper foil (3) passes through the feeding mechanism and the flattening mechanism in sequence and is wound on the winding roller (19). A cutting assembly is provided above the copper foil (3). The cutting assembly is located between the feeding mechanism and the flattening mechanism. The flattening mechanism includes two mounting rollers (22) rotatably connected between the two vertical plates (2). The two mounting rollers (22) are arranged vertically. A plurality of ultrasonic generators (23) are fixedly connected to the inner sidewall of the mounting rollers (22) at equal intervals in the circumferential direction. The ultrasonic generators (23) are located in the middle of the mounting rollers (22). A pulse current conduction component is provided on the outer sidewall of the mounting rollers (22). The copper foil (3) passes between the two mounting rollers (22), and the top and bottom surfaces of the copper foil (3) are in electrical contact with the two pulse current conduction components respectively; Both ends of the mounting roller (22) are coaxially fixed with short shafts (20), the axis of the short shafts (20) is perpendicular to the vertical plate (2) and rotatably connected to the vertical plate (2); The pulse current conduction assembly includes a conductive connecting ring sleeved on the outer wall of the short shaft (20), a conductive slip ring (24) fixed to the outer side of the conductive connecting ring, a pulse current generating device electrically connected to the conductive slip ring (24), a conductive outer shell (21) electrically connected to the conductive connecting ring, and the conductive outer shell (21) coaxially fixed to the outer wall of the mounting roller (22).

2. The electric vehicle lithium battery copper foil cutting device according to claim 1, characterized in that: The feeding mechanism includes two first conveying rollers (10) rotatably connected between the two vertical plates (2). The two first conveying rollers (10) are arranged horizontally and parallel. A first conveyor belt (9) is sleeved on the two first conveying rollers (10). The axis of the first conveying rollers (10) is parallel to the axis of the mounting roller (22). The two first conveying rollers (10) are connected by chain drive. Each of the first conveying rollers (10) is connected to an upper conveying motor (11) by chain drive. The upper conveying motor (11) is located above the first conveyor belt (9) and is fixed to the support plate. On the bottom surface of (5), the support plate (5) is fixed to the side wall of the upright plate (2). A second conveyor belt (17) is provided below the first conveyor belt (9). The second conveyor belt (17) is sleeved on two second conveyor rollers (16). The two second conveyor rollers (16) are arranged horizontally and parallel. The axis of the second conveyor roller (16) is parallel to the axis of the first conveyor roller (10). The copper foil (3) passes between the second conveyor belt (17) and the first conveyor belt (9). The top and bottom surfaces of the copper foil (3) are in frictional contact with the first conveyor belt (9) and the second conveyor belt (17), respectively.

3. The electric vehicle lithium battery copper foil cutting device according to claim 2, characterized in that: An electric telescopic rod (14) is fixedly connected to the top surface of the base plate (1). A bracket (12) is fixedly connected to the top end of the electric telescopic rod (14). Two second conveying rollers (16) are rotatably connected to the top end of the bracket (12). A lower conveying motor (15) is fixedly connected inside the bracket (12). The lower conveying motor (15) is chain-driven connected to any of the second conveying rollers (16). The two second conveying rollers (16) are connected by chain drive. The bottom end of the bracket (12) is provided with two sliding holes, and each of the two sliding holes is slidably connected to a vertically arranged sliding rod (13). The top end of the sliding rod (13) extends into the bracket (12) and is fixedly connected to a limit block. The bottom end of the sliding rod (13) is fixedly connected to the top surface of the base plate (1). The two sliding rods (13) are respectively located on both sides of the electric telescopic rod (14).

4. The electric vehicle lithium battery copper foil cutting device according to claim 1, characterized in that: A support rod (6) is fixedly connected between the two upright plates (2). The axis of the support rod (6) is perpendicular to the side wall of the upright plate (2). A slip ring (7) is slidably connected to the outer side wall of the support rod (6). A through bolt hole is opened on the outer side wall of the slip ring (7). A first bolt (8) is threaded into the bolt hole. One end of the first bolt (8) passes into the slip ring (7) and abuts against the support rod (6). A slider is fixedly connected to the inner side wall of the slip ring (7). The slider is slidably connected in a groove. The groove is opened on the outer side wall of the support rod (6) and is arranged along the length direction of the support rod (6). The cutting assembly is fixed to the bottom end of the slip ring (7).

5. The electric vehicle lithium battery copper foil cutting device according to claim 2, characterized in that: The bottom surface of the copper foil (3) is in sliding contact with an auxiliary plate (18). The auxiliary plate (18) is fixed between the two vertical plates (2). The auxiliary plate (18) is located directly below the cutting assembly. The top surface of the auxiliary plate (18) is flush with the top surface of the second conveyor belt (17). The auxiliary plate (18) has a chamfer at one end near the second conveyor belt (17). The chamfer is located on the top surface of the auxiliary plate (18). The end of the chamfer away from the auxiliary plate (18) is lower than the top surface of the auxiliary plate (18).

6. The electric vehicle lithium battery copper foil cutting device according to claim 1, characterized in that: The winding rollers (19) are provided in a plurality of manner, and the winding rollers (19) are arranged at equal intervals from top to bottom. Adjacent winding rollers (19) are connected by belt drive. Any winding roller (19) passes through the vertical plate (2) and is connected to a winding motor (33) by chain drive.

7. The electric vehicle lithium battery copper foil cutting device according to claim 1, characterized in that: One end of the upright plate (2) is provided with a horizontally arranged mounting groove, and a bearing (25) is detachably connected in the mounting groove. The two bearings (25) are coaxially arranged and respectively sleeved on both ends of the first rotating shaft (4). The copper foil (3) is wrapped around the outer wall of the first rotating shaft (4).

8. The electric vehicle lithium battery copper foil cutting device according to claim 7, characterized in that: One end of the upright plate (2) is connected to a fixing plate (28) by screws. A guide tube (27) is fixed to the side of the fixing plate (28) near the upright plate (2). The guide tube (27) extends into the mounting groove. A top block (26) is slidably connected inside the guide tube (27). The end of the top block (26) away from the fixing plate (28) protrudes from the fixing plate (28) and abuts against the outer wall of the bearing (25). A threaded hole is opened at the end of the top block (26) away from the bearing (25). A second bolt (30) is threadedly connected inside the threaded hole. The end of the second bolt (30) away from the top block (26) protrudes from the fixing plate (28). A rotating piece (31) is coaxially fixed to the outer wall of the second bolt (30). The rotating piece (31) is rotatably connected inside the support ring (29). The support ring (29) is fixed to the fixing plate (28).

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