Constant-speed slitting mechanism for lithium battery pole piece

Abstract

The invention relates to a constant-speed slitting mechanism for a lithium battery pole piece, and belongs to the field of lithium battery production equipment.The constant-speed slitting mechanism comprises a rack, an unwinding device, a slitting device and a winding device, the unwinding device, the slitting device and the winding device are sequentially arranged on the rack from right to left, the winding device comprises a winding roller and a transition roller which are arranged left and right, and the winding roller and the transition roller are arranged in the front-back direction; the transition roller is rotatably arranged on the rack, the winding device further comprises a first driving roller arranged above the transition roller, the first driving roller is actively and rotatably arranged on the rack through a driving motor, and the axis of the first driving roller and the axis of the transition roller are located on the same vertical plane; a mounting seat corresponding to the winding roller is arranged on the machine frame, the winding roller is rotatably arranged on the mounting seat, the mounting seat is arranged on the machine frame in a lifting mode through a spring lifting assembly, the winding device further comprises a second driving roller arranged above the winding roller, and the second driving roller is actively and rotatably arranged on the machine frame through a driving motor. The axis of the second driving roller and the axis of the winding roller are located on the same vertical plane. The upper end of the outer side surface of the second driving roller is located below the lower end of the outer side surface of the first driving roller. While the slitting efficiency is ensured, the slitting effect of the positive / negative pole piece of the lithium battery is ensured, and the probability of defective products is reduced.

Description

Technical Field

[0001] The present invention relates to the field of lithium battery production equipment, and particularly to a constant-speed slitting mechanism for lithium battery electrode sheets. Background Art

[0002] Lithium-ion batteries have the advantages of high energy density, no memory effect, long service life, green and pollution-free, and low self-discharge. They have become the preferred power supply devices for various portable electronic products and have gradually extended to fields such as portable power tools, electric vehicles, and energy storage power stations. With the development of lithium-ion batteries, they will surely play a more important role in human production and life. During the production of lithium batteries, it is necessary to wind the strip-shaped positive and negative electrodes together. Among them, the positive and negative electrodes of lithium batteries are cut from strip-shaped aluminum current collectors coated with positive or negative electrode slurries during processing.

[0003] The patent document with the publication number CN112374257A discloses a slitting mechanism for lithium batteries. When cutting a strip-shaped body, the strip-shaped body corresponding to the slitting ring and the annular groove will be pressed and adhered to the slitting ring, and the other parts will be pressed on the surface of the second slitting roller. After slitting, the strip-shaped body corresponding to the slitting ring and the annular groove will be pressed at the bottom of the annular groove. Therefore, the present invention can effectively prevent the edges of the strip-shaped body from deforming during slitting. However, the first winding roller and the second winding roller that drive the movement of the aluminum current collector will cause the moving speed of the aluminum current collector to become faster and faster as the aluminum current collector wound on them increases. An excessively fast winding speed will affect its slitting effect, making its slitting speed unable to keep up with the moving speed, resulting in the aluminum current collector being pulled and deformed, which will lead to the appearance of defective products. If the rotation speeds of the first winding roller and the second winding roller are reduced, the slitting speed will be too low, affecting its slitting efficiency.

[0004] Based on this, the present invention provides a constant-speed slitting mechanism for lithium battery electrode sheets to make the aluminum current collector be slit at a constant speed, thereby ensuring its slitting effect and reducing the probability of defective products. Summary of the Invention

[0005] Based on this, it is necessary to provide a constant-speed slitting mechanism for lithium battery electrode sheets, including a frame. A unwinding device, a slitting device, and a winding device are sequentially arranged on the frame from right to left. The winding device includes a winding roller and a transition roller arranged horizontally. The winding roller and the transition roller are both arranged along the front-back direction. The transition roller is rotatably arranged on the frame. The winding device further includes a first driving roller arranged above the transition roller. The first driving roller is actively rotatably arranged on the frame through a driving motor, and the axis of the first driving roller and the axis of the transition roller are located in the same vertical plane. An installation seat is arranged on the frame corresponding to the winding roller. The winding roller is rotatably arranged on the installation seat. The installation seat is vertically movably arranged on the frame through a spring lifting assembly. The winding device further includes a second driving roller arranged above the winding roller. The second driving roller is actively rotatably arranged on the frame through a driving motor, and the axis of the second driving roller and the axis of the winding roller are located in the same vertical plane. The upper end of the outer surface of the second driving roller is located below the lower end of the outer surface of the first driving roller.

[0006] The slitting mechanism of the present invention is used for slitting the positive / negative electrode sheets after the coating operation.

[0007] In the present invention, the unwinding device is used to install the wound positive / negative electrode sheets and unwind them to convey them to the slitting device for slitting. The winding device is used to wind the positive / negative electrode sheets slit by the slitting device to complete the collection of the positive / negative electrode sheets.

[0008] In the present invention, the power for the entire movement process of the positive / negative electrode sheets is provided by the winding device. Specifically, after the positive / negative electrode sheets enter the winding device, they need to pass through the gap between the first driving roller and the transition roller, and then pass between the second driving roller and the winding roller and be fixed on the winding roller. Among them, the first driving roller and the second driving roller are driven by a driving motor to rotate at the same linear speed, which can drive the positive / negative electrode sheets, thereby completing the slitting and winding processes of the positive / negative electrode sheets. Among them, in the winding device, the distance between the first driving roller and the transition roller needs to be set according to the thickness of the positive / negative electrode sheets to ensure that the cooperation between the first driving roller and the transition roller can smoothly drive the positive / negative electrode sheets to move. Similarly, the distance between the second driving roller and the winding roller also needs to be set according to the thickness of the positive / negative electrode sheets to ensure that the cooperation between the second driving roller and the winding roller can smoothly drive the positive / negative electrode sheets to move, so as to smoothly complete the winding of the positive / negative electrode sheets.

[0009] In the present invention, the driving force for the movement of the positive / negative electrode plates is provided by the first driving roller and the second driving roller. The moving speed of the positive / negative electrode plates is determined by the linear speed of the first driving roller. On the premise that the rotation speed of the first driving roller remains unchanged, the speed at which it drives the positive / negative electrode plates to move will not change either. Therefore, the speed at which the positive / negative electrode plates driven by the first driving roller pass through the slitting device is kept constant, which can effectively ensure the cutting efficiency of the slitting device for the positive / negative electrode plates, and can avoid the situation where the slitting speed cannot keep up with the moving speed of the positive / negative electrode plates, resulting in the pulling deformation of the aluminum current collector. In addition, the rotation speed of the second driving roller is the same as that of the first driving roller. During the process of the winding roller gradually winding the positive / negative electrode plates, the winding roller will be gradually pushed downward. Therefore, the winding roller can rotate with a constant linear speed. Therefore, under the drive of the second driving roller, the positive / negative electrode plates can be wound onto the winding roller synchronously and tightly.

[0010] Further, the spring lifting assembly includes a mounting plate fixedly arranged on the frame. A mounting hole penetrating the mounting plate is formed on the mounting plate. The mounting hole is vertically arranged. An installation column is slidably arranged up and down in the mounting hole. The top end of the installation column is fixedly connected to the bottom end of the mounting seat. A cylindrical spring is also sleeved on the installation column. The top end and the bottom end of the cylindrical spring respectively abut against the mounting seat and the mounting plate.

[0011] In the present invention, during the process of the winding roller gradually winding the positive / negative electrode plates, as the thickness of the wound positive / negative electrode plates increases, the cylindrical spring sleeved on the installation column will be gradually compressed, so as to realize the gradual downward movement of the winding roller, and at the same time, it can ensure that the friction force between the winding roller and the second driving roller can smoothly drive the winding roller to rotate.

[0012] Further, at least three support columns are vertically arranged at the bottom end of the mounting seat. The support columns are arranged around the installation column; corresponding to the support columns on the mounting plate, a limiting hole penetrating the mounting plate is formed. The support columns are inserted into the corresponding limiting holes and are slidably matched with the corresponding limiting holes.

[0013] In the present invention, the matching structure of the support columns and the limiting holes can limit the moving direction of the mounting seat to ensure that the mounting seat moves strictly in the up and down direction, so as to ensure that the winding roller always remains horizontal, ensure the stability of the winding process of the winding roller, and further enable the positive / negative electrode plates to be neatly wound on the winding roller.

[0014] Further, the unwinding device includes an unwinding roller rotatably arranged on the frame. The unwinding roller is arranged along the front and back direction.

[0015] In the present invention, the unwinding roller is used to mount the wound positive / negative electrode sheets. When the winding device pulls the positive / negative electrode sheets to move, the unwinding roller can unwind the positive / negative electrode sheets through its rotation.

[0016] Further, the slitting device includes a first slitting roller and a second slitting roller arranged up and down. Both the first slitting roller and the second slitting roller are arranged along the front-rear direction. A plurality of annular cutting blades are equidistantly arranged on the outer surface of the first slitting roller, and the lower ends of the annular cutting blades abut against the outer surface of the second slitting roller.

[0017] In the present invention, the first slitting roller and the second slitting roller are used to slit the positive / negative electrode sheets passing through them. Among them, the height at which the annular cutting blade extends out of the first slitting roller needs to be determined according to the thickness of the positive / negative electrode sheets, for example, the same as or slightly higher than the thickness of the positive / negative electrode sheets, to ensure that the positive / negative electrode sheets can be completely cut.

[0018] Further, the slitting device further includes a limiting roller. The limiting roller is located on the right side of the second slitting roller and is arranged along the front-rear direction. The upper end of the outer surface of the limiting roller is flush with the upper end of the outer surface of the second slitting roller; the horizontal height of the lower end of the outer surface of the winding roller is lower than the horizontal height of the lower end of the outer surface of the limiting roller.

[0019] In the present invention, the installation method of the positive / negative electrode sheets is as follows: wind the positive / negative electrode sheets clockwise on the unwinding roller, and then lead out the positive / negative electrode sheets from the lower end of the winding roller, pass them through the upper end of the limiting roller and then enter between the first slitting roller and the second slitting roller, and then enter between the second driving roller and the winding roller through between the first driving roller and the transition roller, and finally fix them on the winding roller.

[0020] In the present invention, making the upper end of the outer surface of the limiting roller flush with the upper end of the outer surface of the second slitting roller can make the positive / negative electrode sheets enter between the first slitting roller and the second slitting roller horizontally, which can effectively improve the flatness of the slitting of the positive / negative electrode sheets by the first slitting roller and the second slitting roller.

[0021] Further, the slitting device includes a first slitting roller and a second slitting roller arranged up and down. Both the first slitting roller and the second slitting roller are arranged along the front-rear direction. A plurality of annular grooves with equal widths are formed on the outer surface of the first slitting roller, and the distance between adjacent annular grooves is the same as the width of the annular grooves. Annular protrusions are arranged on the outer surface of the second slitting roller corresponding to the annular grooves, and the annular protrusions extend into the corresponding annular grooves.

[0022] In the present invention, a shear structure is formed between the edge of the annular rib and the upper edge of the annular groove. When the positive / negative electrode plate passes through this shear structure, it will be cut by this shear structure, so as to realize the slitting of the positive / negative electrode plate. At the same time, during the process of shearing the positive / negative electrode plate, the annular rib will press the positive / negative electrode plate against the bottom of the annular groove, so as to effectively avoid warping deformation at the cut of the positive / negative electrode plate during the shearing process, thereby improving the flatness of the positive / negative electrode plate obtained by shearing. Among them, in order to make the annular rib press the positive / negative electrode plate during the shearing process, therefore, it is necessary to set the distance between the annular rib and the annular groove according to the thickness of the positive / negative electrode plate.

[0023] The principle and effect of the present invention will be further described below in combination with the above technical solutions and the accompanying drawings: In the present invention, the power for the movement of the positive / negative electrode plate is provided by the first driving roller and the second driving roller. The moving speed of the positive / negative electrode plate is determined by the linear speed of the first driving roller. On the premise that the rotation speed of the first driving roller remains unchanged, the speed at which it drives the positive / negative electrode plate to move will not change either. Therefore, the speed at which the positive / negative electrode plate driven by the first driving roller passes through the slitting device is constant, which can effectively ensure the cutting efficiency of the slitting device for the positive / negative electrode plate, and can avoid the situation that the slitting speed cannot keep up with the moving speed of the positive / negative electrode plate, resulting in the pulling deformation of the aluminum current collector. Brief Description of the Drawings

[0024] Figure 1 is a schematic structural diagram of the constant-speed slitting mechanism for lithium battery electrode plates according to an embodiment of the present invention; Figure 2 is a schematic installation structure diagram of the winding roller according to an embodiment of the present invention; Figure 3 is a schematic cooperation structure diagram of the first slitting roller and the second slitting roller according to an embodiment of the present invention Figure 1 ; Figure 4 is a schematic cooperation structure diagram of the first slitting roller and the second slitting roller according to an embodiment of the present invention Figure 2 。 Drawings

[0025] 1-unwinding device, 11-unwinding roller, 2-slitting device, 21-second slitting roller, 211-annular rib, 22-first slitting roller, 221a-annular cutting tool, 221b-annular groove, 23-limiting roller, 3-winding device, 31-transition roller, 32-first driving roller, 33-winding roller, 34-second driving roller, 35-mounting seat, 36-mounting column, 37-mounting plate, 38-cylindrical spring, 39-supporting column, 4-positive / negative electrode plate. Embodiment

[0026] For the convenience of those skilled in the art to understand, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments: As Figures 1-4 , a constant-speed slitting mechanism for lithium battery electrode sheets includes a frame (not shown in the figure). A unwinding device 1, a slitting device 2, and a winding device 3 are sequentially arranged on the frame from right to left. The winding device 3 includes a winding roller 33 and a transition roller 31 arranged left and right. The winding roller 33 and the transition roller 31 are both arranged along the front-back direction. The transition roller 31 is rotatably arranged on the frame. The winding device 3 further includes a first driving roller 32 arranged above the transition roller 31. The first driving roller 32 is actively rotatably arranged on the frame through a driving motor, and the axis of the first driving roller 32 and the axis of the transition roller 31 are located in the same vertical plane. An installation seat 35 is arranged on the frame corresponding to the winding roller 33. The winding roller 33 is rotatably arranged on the installation seat 35. The installation seat 35 is vertically movably arranged on the frame through a spring lifting assembly. The winding device 3 further includes a second driving roller 34 arranged above the winding roller 33. The second driving roller 34 is actively rotatably arranged on the frame through a driving motor, and the axis of the second driving roller 34 and the axis of the winding roller 33 are located in the same vertical plane. The upper end of the outer surface of the second driving roller 34 is located below the lower end of the outer surface of the first driving roller 32.

[0027] The slitting mechanism of the present invention is used to slit the positive / negative electrode sheets 4 that have completed the coating operation.

[0028] In the present invention, the unwinding device 1 is used to install the wound positive / negative electrode sheets 4 and unwind them to convey them to the slitting device 2 for slitting. The winding device 3 is used to wind the positive / negative electrode sheets 4 slit by the slitting device 2 to complete the collection of the positive / negative electrode sheets 4.

[0029] In the present invention, the power for the entire movement process of the positive / negative electrode sheet 4 is provided by the winding device 3. Specifically, after the positive / negative electrode sheet 4 enters the winding device 3, it needs to pass through the gap between the first driving roller 32 and the transition roller 31, and then pass between the second driving roller 34 and the winding roller 33 and be fixed on the winding roller 33. Among them, the first driving roller 32 and the second driving roller 34 are driven by a driving motor and rotate at the same linear speed, which can drive the positive / negative electrode sheet 4, thereby completing the slitting and winding processes of the positive / negative electrode sheet 4. Among them, in the winding device 3, the distance between the first driving roller 32 and the transition roller 31 needs to be set according to the thickness of the positive / negative electrode sheet 4 to ensure that the cooperation between the first driving roller 32 and the transition roller 31 can smoothly drive the positive / negative electrode sheet 4 to move. Similarly, the distance between the second driving roller 34 and the winding roller 33 also needs to be set according to the thickness of the positive / negative electrode sheet 4 to ensure that the cooperation between the second driving roller 34 and the winding roller 33 can smoothly drive the positive / negative electrode sheet 4 to move, thereby smoothly completing the winding of the positive / negative electrode sheet 4.

[0030] In the present invention, the power for the movement of the positive / negative electrode sheet 4 is provided by the first driving roller 32 and the second driving roller 34. The movement speed of the positive / negative electrode sheet 4 is determined by the linear speed of the first driving roller 32. On the premise that the rotation speed of the first driving roller 32 remains unchanged, the speed at which it drives the positive / negative electrode sheet 4 to move will not change either. Therefore, the speed at which the positive / negative electrode sheet 4 driven by the first driving roller 32 passes through the slitting device 2 is kept constant, which can effectively ensure the cutting efficiency of the slitting device 2 for the positive / negative electrode sheet 4, and can avoid the situation where the slitting speed cannot keep up with the movement speed of the positive / negative electrode sheet 4, resulting in the pulling deformation of the aluminum current collector. In addition, the rotation speed of the second driving roller 34 is the same as that of the first driving roller 32. During the process of the winding roller 33 gradually winding the positive / negative electrode sheet 4, the winding roller 33 will be gradually pushed downward. Therefore, the winding roller 33 can rotate at a constant linear speed. Therefore, under the drive of the second driving roller 34, the positive / negative electrode sheet 4 can be wound onto the winding roller 33 synchronously and tightly.

[0031] In one embodiment, the spring lifting assembly includes a mounting plate 37 fixedly arranged on the frame. A mounting hole penetrating the mounting plate 37 is formed on the mounting plate 37. The mounting hole is vertically arranged. An installation column 36 is slidably arranged up and down in the mounting hole. The top end of the installation column 36 is fixedly connected to the bottom end of the mounting seat 35. A cylindrical spring 38 is also sleeved on the installation column 36. The top end and the bottom end of the cylindrical spring 38 respectively abut against the mounting seat 35 and the mounting plate 37.

[0032] In this embodiment, during the process of the winding roller 33 gradually winding the positive / negative electrode sheet 4, as the thickness of the wound positive / negative electrode sheet 4 increases, the cylindrical spring 38 sleeved on the mounting post 36 will be gradually compressed, so as to realize the gradual downward movement of the winding roller 33, and at the same time, it can ensure that the frictional force between the winding roller 33 and the second driving roller 34 can smoothly drive the winding roller 33 to rotate.

[0033] In one embodiment, at least three support columns 39 are vertically arranged at the bottom end of the mounting seat 35, and the support columns 39 are arranged around the mounting post 36; corresponding to the support columns 39 on the mounting plate 37, limiting holes penetrating through the mounting plate 37 are provided, and the support columns 39 are inserted into the corresponding limiting holes and are slidably matched with the corresponding limiting holes.

[0034] In this embodiment, the matching structure of the support column 39 and the limiting hole can limit the moving direction of the mounting seat 35, so as to ensure that the mounting seat 35 moves strictly in the up and down direction, thereby ensuring that the winding roller 33 always remains horizontal, ensuring the stability of the winding process of the winding roller 33, and further enabling the positive / negative electrode sheet 4 to be neatly wound on the winding roller 33.

[0035] In one embodiment, the unwinding device 1 includes an unwinding roller 11 rotatably arranged on the frame, and the unwinding roller 11 is arranged along the front-back direction.

[0036] In this embodiment, the unwinding roller 11 is used to mount the wound positive / negative electrode sheet 4. When the winding device 3 pulls the positive / negative electrode sheet 4 to move, the unwinding roller 11 can unwind the positive / negative electrode sheet 4 through its rotation.

[0037] In one embodiment, the slitting device 2 includes a first slitting roller 22 and a second slitting roller 21 arranged up and down. The first slitting roller 22 and the second slitting roller 21 are both arranged along the front-back direction. A plurality of annular cutting blades 221a are equidistantly arranged on the outer surface of the first slitting roller 22, and the lower ends of the annular cutting blades 221a abut against the outer surface of the second slitting roller 21.

[0038] In this embodiment, the first slitting roller 22 and the second slitting roller 21 are used for slitting the positive / negative electrode sheet 4 passing through them. Among them, the height at which the annular cutting blade 221a extends out of the first slitting roller 22 needs to be determined according to the thickness of the positive / negative electrode sheet 4, for example, the same as or slightly higher than the thickness of the positive / negative electrode sheet 4, so as to ensure that the positive / negative electrode sheet 4 can be completely cut.

[0039] In one embodiment, the slitting device 2 further includes a limiting roller 23. The limiting roller 23 is located on the right side of the second slitting roller 21 and is arranged in the front-rear direction. The upper end of the outer surface of the limiting roller 23 is flush with the upper end of the outer surface of the second slitting roller 21; the horizontal height of the lower end of the outer surface of the winding roller 33 is lower than the horizontal height of the lower end of the outer surface of the limiting roller 23.

[0040] In this embodiment, the installation method of the positive / negative electrode plate 4 is as follows: The positive / negative electrode plate 4 is installed on the unwinding roller 11 in a clockwise winding manner. Then, the positive / negative electrode plate 4 is led out from the lower end of the winding roller 33, passes through the upper end of the limiting roller 23, enters between the first slitting roller 22 and the second slitting roller 21, and then enters between the second driving roller 34 and the winding roller 33 via between the first driving roller 32 and the transition roller 31, and is finally fixed on the winding roller 33.

[0041] In this embodiment, making the upper end of the outer surface of the limiting roller 23 flush with the upper end of the outer surface of the second slitting roller 21 can enable the positive / negative electrode plate 4 to enter horizontally between the first slitting roller 22 and the second slitting roller 21, and can effectively improve the flatness of the slitting of the positive / negative electrode plate 4 by the first slitting roller 22 and the second slitting roller 21.

[0042] In one embodiment, the slitting device 2 includes a first slitting roller 22 and a second slitting roller 21 arranged vertically. The first slitting roller 22 and the second slitting roller 21 are both arranged in the front-rear direction. A plurality of annular grooves 221b with equal widths are formed on the outer surface of the first slitting roller 22, and the distance between adjacent annular grooves 221b is the same as the width of the annular groove 221b. An annular rib 211 is provided on the outer surface of the second slitting roller 21 corresponding to the annular groove 221b, and the annular rib 211 extends into the corresponding annular groove 221b.

[0043] In this embodiment, a shearing structure will be formed between the edge of the annular rib 211 and the upper edge of the annular groove 221b. When the positive / negative electrode plate 4 passes through this shearing structure, it will be cut open by this shearing structure, thereby realizing the slitting of the positive / negative electrode plate 4. At the same time, during the shearing process of the positive / negative electrode plate 4, the annular rib 211 will press the positive / negative electrode plate 4 against the bottom of the annular groove 221b, thereby effectively avoiding warping deformation at the cut of the positive / negative electrode plate 4 during the shearing process, and thus improving the flatness of the positive / negative electrode plate 4 obtained by shearing. Among them, in order to enable the annular rib 211 to press the positive / negative electrode plate 4 during the shearing process, therefore, the distance between the annular rib 211 and the annular groove 221b needs to be set according to the thickness of the positive / negative electrode plate 4.

[0044] The above embodiments merely represent several implementation manners of the present invention. The description thereof is relatively specific and detailed, but it should not be construed as a limitation on the scope of the invention patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several variations and improvements can still be made, and these all fall within the protection scope of the present invention. Therefore, the protection scope of the present invention patent shall be subject to the appended claims.

Claims

1. An equal-speed slitting mechanism for lithium battery electrode sheets, comprising a frame, on which a unwinding device, a slitting device and a winding device are sequentially arranged from right to left. It is characterized in that the winding device includes a winding roller and a transition roller arranged horizontally, and both the winding roller and the transition roller are arranged along the front-rear direction; the transition roller is rotatably arranged on the frame, and the winding device further includes a first driving roller arranged above the transition roller, the first driving roller is actively rotatably arranged on the frame through a driving motor, and the axis of the first driving roller and the axis of the transition roller are located in the same vertical plane; a mounting seat is arranged on the frame corresponding to the winding roller, the winding roller is rotatably arranged on the mounting seat, the mounting seat is vertically arranged on the frame through a spring lifting assembly, and the winding device further includes a second driving roller arranged above the winding roller, the second driving roller is actively rotatably arranged on the frame through a driving motor, and the axis of the second driving roller and the axis of the winding roller are located in the same vertical plane; the upper end of the outer surface of the second driving roller is located below the lower end of the outer surface of the first driving roller.

2. An equal-speed slitting mechanism for lithium battery electrode sheets according to claim 1, It is characterized in that the spring lifting assembly includes a mounting plate fixedly arranged on the frame, a mounting hole penetrating through the mounting plate is opened on the mounting plate, the mounting hole is vertically arranged, a mounting column is slidably arranged up and down in the mounting hole, the top end of the mounting column is fixedly connected with the bottom end of the mounting seat, and a cylindrical spring is further sleeved on the mounting column, and the top end and the bottom end of the cylindrical spring respectively abut against the mounting seat and the mounting plate.

3. An equal-speed slitting mechanism for lithium battery electrode sheets according to claim 2, It is characterized in that at least three support columns are vertically arranged at the bottom end of the mounting seat, and the support columns are arranged around the mounting column; limiting holes penetrating through the mounting plate are opened on the mounting plate corresponding to the support columns, and the support columns are inserted into the corresponding limiting holes and are slidably matched with the corresponding limiting holes.

4. An equal-speed slitting mechanism for lithium battery electrode sheets according to claim 3, It is characterized in that the unwinding device includes an unwinding roller rotatably arranged on the frame, and the unwinding roller is arranged along the front-rear direction.

5. An equal-speed slitting mechanism for lithium battery electrode sheets according to claim 4, It is characterized in that the slitting device includes a first slitting roller and a second slitting roller arranged vertically, both the first slitting roller and the second slitting roller are arranged along the front-rear direction, a plurality of annular cutting knives are equidistantly arranged on the outer surface of the first slitting roller, and the lower ends of the annular cutting knives abut against the outer surface of the second slitting roller.

6. An equal-speed slitting mechanism for lithium battery electrode sheets according to claim 5, It is characterized in that The slitting device further includes a limiting roller, which is located on the right side of the second slitting roller and arranged along the front-back direction. The upper end of the outer surface of the limiting roller is flush with the upper end of the outer surface of the second slitting roller; the horizontal height of the lower end of the outer surface of the winding roller is lower than the horizontal height of the lower end of the outer surface of the limiting roller.

7. An equal-speed slitting mechanism for lithium battery electrodes according to claim 4, characterized in that the slitting device includes a first slitting roller and a second slitting roller arranged vertically. Both the first slitting roller and the second slitting roller are arranged along the front-back direction. A plurality of annular grooves with equal widths are formed on the outer surface of the first slitting roller, and the distance between adjacent annular grooves is the same as the width of the annular grooves. Annular ridges are arranged on the outer surface of the second slitting roller corresponding to the annular grooves, and the annular ridges extend into the corresponding annular grooves.

Images