Device for rolling foil area of battery pole piece

Abstract

The utility model relates to a device for rolling a foil area of a battery pole piece. The device comprises a base, a lower roller and an upper roller, wherein the lower roller and the upper roller are arranged on the base and extend horizontally; the lower roller and the upper roller are connected with the base through a mounting frame, and the end of the lower roller and the end of the upper roller are both connected with a power mechanism used for driving the lower roller and the end of the upper roller to rotate. The upper roller is connected with a height adjusting mechanism, and the height adjusting mechanism is used for adjusting the relative position between the upper roller and the lower roller; each of the upper roller and the lower roller comprises a middle roller and end rollers which are arranged at the two ends of the middle roller and detachably connected with the middle roller, and the end rollers are connected with the power mechanism; the outer diameter of the end roller is equal to that of the middle roller, and a shaft shoulder is arranged in the middle of the end roller. The shaft shoulder is arranged on the end roller, the position of the shaft shoulder is matched with the foil area in the rolling process, different extensibility of the foil area and the dressing area caused by suspension of the foil area is avoided, and therefore foil belt breakage is avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of lithium battery production, and in particular relates to a device for rolling a battery pole piece foil area. Background Art

[0002] Lithium batteries are mainly composed of positive and negative electrodes, separators, electrolytes and aluminum-plastic films or aluminum shells, among which positive and negative electrodes are the main components. During the production of electrodes, the electrodes need to be rolled. The electrodes are divided into a dressing area and a foil area, and the thickness of the dressing area is greater than that of the foil area. Since the roller shaft used in rolling has no diameter change, the foil area is in a suspended state during rolling. Therefore, the ductility of the dressing area after rolling is greater than that of the foil area, resulting in easy breakage at the contact point between the dressing area and the foil area. Utility Model Content

[0003] The utility model aims to provide a device for rolling a battery pole sheet foil area to solve the technical problems raised in the background technology.

[0004] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0005] A device for rolling a battery electrode foil area, comprising: a base, and a lower roller and an upper roller arranged on the base and extending horizontally; the lower roller and the upper roller are connected to the base through a mounting frame, and the ends of the lower roller and the upper roller are connected to a power mechanism for driving them to rotate; the upper roller is connected to a height adjustment mechanism, and the height adjustment mechanism is used to adjust the relative position between the upper roller and the lower roller;

[0006] The upper roller and the lower roller each include an intermediate roller and end rollers arranged at both ends of the intermediate roller and detachably connected to the intermediate roller, and the end rollers are connected to the power mechanism; the outer diameter of the end roller is equal to the outer diameter of the intermediate roller, and a shoulder is provided in the middle of the end roller.

[0007] As a further improvement of the utility model, both ends of the intermediate roller are provided with internal threads, the ends of the end rollers are provided with external threads matching the internal threads, and the intermediate roller and the end rollers are detachably connected via threads.

[0008] As a further improvement of the utility model, the intermediate roller is cylindrical, and a tensioning roller is coaxially arranged inside it. A plurality of raised arc-shaped pieces are arranged in the middle of the tensioning roller, and a spring is arranged between the bottom of each arc-shaped piece and the outer wall of the tensioning roller, and the inner wall of the intermediate roller is in contact with the arc-shaped piece.

[0009] As a further improvement of the utility model, the height adjustment mechanism includes two hydraulic cylinders, both of which are installed on both sides of the upper part of the mounting frame through hydraulic cylinder seats, and their output shafts are downwardly connected to the bearing seat of the upper roller.

[0010] As a further improvement of the utility model, the height adjustment mechanism further includes a guide plate and a movable plate;

[0011] The guide plates are vertically arranged on both sides of the upper part of the base, and are provided with vertical slots thereon; the movable plate is connected to the bearing seat of the upper roller and the power mechanism of the upper roller, and is provided with guide slots passing through the guide plates; the slots located at the upper and lower parts of the movable plate are connected with fixing bolts.

[0012] As a further improvement of the present invention, the power mechanism includes a motor coaxially connected to the upper roller and the lower roller via a coupling.

[0013] The beneficial effects of adopting the above technical solution are:

[0014] The upper roller and the lower roller of the utility model both include a detachably connected intermediate roller and an end roller, and a shoulder is provided on the end roller, and the diameter at the shoulder is larger than the diameter at other positions of the end roller; it is equivalent to the roller shaft having a variable diameter adapted to the thickness of the foil area, and the distance between the upper roller and the lower roller shoulders during rolling is adapted to the foil area, and the distance between other positions is adapted to the dressing area, so as to avoid different ductility of the foil area and the dressing area caused by the suspension of the foil area during rolling, thereby avoiding belt breakage. In addition, the end roller and the intermediate roller are detachably connected, so that the end rollers with different diameter shoulders and different position shoulders can be replaced to adapt to different pole pieces. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of the utility model;

[0016] Figure 2 It is a structural schematic diagram of the roller of the utility model;

[0017] Markings in the figure: 1 base, 2 upper roller, 3 lower roller, 4 mounting frame, 5 middle roller, 6 end roller, 7 shoulder, 8 tensioning roller, 9 arc plate, 10 spring, 11 hydraulic cylinder, 12 hydraulic cylinder seat, 13 bearing seat, 14 guide plate, 15 movable plate, 16 notch, 17 guide groove, 18 fixing bolt, 19 motor. DETAILED DESCRIPTION

[0018] In order to better understand the purpose, structure and function of the present invention, the present invention is described clearly and completely below in conjunction with the accompanying drawings.

[0019] like Figure 1-Figure 2The device shown is used for rolling the battery electrode foil area, which includes: a base 1, and a lower roller 3 and an upper roller 2 arranged horizontally on the base 1. The upper roller 2 and the lower roller 3 are used in combination to roll the electrode foil passing therebetween. The lower roller 3 and the upper roller 2 are connected to the base 1 through a mounting frame 4. The ends of the lower roller 3 and the upper roller 2 are both connected to a power mechanism for driving them to rotate. In this embodiment, the power mechanism includes a motor 19 coaxially connected to the upper roller 2 and the lower roller 3 through a coupling, and bearings and bearing seats 13 are provided at the connection between the upper roller 2 and the lower roller 3 and the mounting frame 4 to support the rollers.

[0020] The upper roller 2 and the lower roller 3 both include an intermediate roller 5 and end rollers 6 disposed at both ends of the intermediate roller 5 and detachably connected to the intermediate roller 5. The end rollers 6 are connected to the power mechanism, that is, the end rollers 6 are coaxially connected to the motor 19; the outer diameter of the end roller 6 is equal to the outer diameter of the intermediate roller 5, and a shoulder 7 is disposed in the middle of the end roller 6, and the diameter at the shoulder 7 is greater than the diameter at other positions of the end roller 6. The distance between the intermediate roller 5 of the upper roller 2 and the lower roller 3 and other positions of the end roller 6 is adapted to the thickness of the foil area, and the distance between the shoulders 7 is adapted to the thickness of the dressing area, that is, it is equivalent to the roller shaft having a variable diameter adapted to the thickness of the foil area, avoiding the different ductility of the foil area and the dressing area caused by the suspension of the foil area during rolling, thereby avoiding the foil strip from breaking. The end rollers 6 are detachably connected to the intermediate roller 5, so the end rollers 6 with different diameter shoulders 7 and different positions of shoulders 7 can be replaced to adapt to different foils.

[0021] In this embodiment, both ends of the intermediate roller 5 are provided with internal threads, and the ends of the end rollers 6 are provided with external threads adapted to the internal threads, and the intermediate roller 5 and the end rollers 6 are detachably connected through threads; the direction of rotation of the motor 19 is opposite to the direction of tightening the threads, so as to avoid releasing the threaded connection between the intermediate roller 5 and the end rollers 6 when the rollers rotate. In a possible implementation, the intermediate roller 5 is cylindrical, and a tensioning roller 8 is coaxially arranged inside it, and a plurality of raised arc-shaped pieces 9 are arranged in the middle of the tensioning roller 8, and a spring 10 is arranged between the bottom of each arc-shaped piece 9 and the outer wall of the tensioning roller 8, and the inner wall of the intermediate roller 5 contacts the arc-shaped piece 9; when the intermediate roller 5 is sleeved on the tensioning roller 8, the inner part of the intermediate roller 5 is expanded and tightened under the action of the arc-shaped piece 9 and the spring 10. Under this structure, intermediate rollers 5 with different outer diameters can be replaced, and then the distance between the two intermediate rollers 5 can be adjusted to adapt to the thickness of the dressing area.

[0022] In addition, the upper roller 2 is connected to a height adjustment mechanism, which is used to adjust the relative position between the upper roller 2 and the lower roller 3, as another structure that can adjust the distance between the two intermediate rollers 5 to adapt to foils of different thicknesses in the dressing area. Further, the height adjustment mechanism includes two hydraulic cylinders 11, both of which are installed on both sides of the upper part of the mounting frame 4 through hydraulic cylinder seats 12, and their output shafts are connected downward to the bearing seat 13 of the upper roller 2. The hydraulic cylinder 11 drives the bearing seat 13 to move up and down when it works, thereby driving the upper roller 2 to move up and down, and adjusting the height of the upper roller 2. In addition, the height adjustment mechanism also includes a guide plate 14 and a movable plate 15; the movement of the upper roller 2 is guided to ensure that the upper roller 2 moves linearly up and down; the guide plate 14 is vertically arranged on both sides of the upper part of the base 1, and a vertical notch 16 is provided on it; the movable plate 15 is connected to the bearing seat 13 of the upper roller 2 and the power mechanism of the upper roller 2, and a guide groove 17 passing through the guide plate 14 is provided on the movable plate 15; the notch 16 located at the upper and lower parts of the movable plate 15 is connected with a fixing bolt 18. The guide groove 17 is used to slide on the guide plate 14 for guidance. When the hydraulic cylinder 11 drives the upper roller 2 to the specified position, a fixing bolt 18 can be set at the notch 16 at the upper and lower positions of the movable plate 15 to limit the movable plate 15.

[0023] It is understood that the present invention is described by some embodiments, and those skilled in the art are aware that various changes or equivalent substitutions may be made to these features and embodiments without departing from the spirit and scope of the present invention. In addition, under the teachings of the present invention, these features and embodiments may be modified to adapt to specific circumstances and materials without departing from the spirit and scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the scope of protection of the present invention.

Claims

1. A device for rolling a battery pole sheet foil area, characterized in that: It includes: A base (1), and a lower roller (3) and an upper roller (2) which are arranged on the base (1) and extend horizontally; The lower roller (3) and the upper roller (2) are connected to the base (1) via a mounting frame (4); the ends of the lower roller (3) and the upper roller (2) are connected to a power mechanism for driving them to rotate; the upper roller (2) is connected to a height adjustment mechanism, and the height adjustment mechanism is used to adjust the relative position between the upper roller (2) and the lower roller (3); The upper roller (2) and the lower roller (3) both include an intermediate roller (5) and end rollers (6) arranged at both ends of the intermediate roller (5) and detachably connected to the intermediate roller (5), and the end rollers (6) are connected to the power mechanism; the outer diameter of the end roller (6) is equal to the outer diameter of the intermediate roller (5), and a shoulder (7) is provided in the middle of the end roller (6).

2. The device for rolling a battery electrode foil area according to claim 1, characterized in that: Both ends of the intermediate roller (5) are provided with internal threads, and the ends of the end rollers (6) are provided with external threads matching the internal threads. The intermediate roller (5) and the end rollers (6) are detachably connected via threads.

3. The device for rolling a battery electrode foil area according to claim 1, characterized in that: The intermediate roller (5) is cylindrical, and a tensioning roller (8) is coaxially arranged inside the intermediate roller (5). A plurality of raised arc-shaped pieces (9) are arranged in the middle of the tensioning roller (8). A spring (10) is arranged between the bottom of each arc-shaped piece (9) and the outer wall of the tensioning roller (8). The inner wall of the intermediate roller (5) is in contact with the arc-shaped piece (9).

4. The device for rolling a battery electrode foil area according to claim 1, characterized in that: The height adjustment mechanism comprises two hydraulic cylinders (11), both of which are mounted on both sides of the upper part of the mounting frame (4) via hydraulic cylinder seats (12), and their output shafts are downwardly connected to the bearing seats (13) of the upper roller (2).

5. The device for rolling a battery electrode foil area according to claim 4, characterized in that: The height adjustment mechanism also includes a guide plate (14) and a movable plate (15); The guide plates (14) are vertically arranged on both sides of the upper part of the base (1), and are provided with vertical notches (16); the movable plate (15) is connected to the bearing seat (13) of the upper roller (2) and the power mechanism of the upper roller (2), and the movable plate (15) is provided with a guide groove (17) passing through the guide plate (14); the notches (16) located at the upper and lower parts of the movable plate (15) are connected with fixing bolts (18).

6. The device for rolling a battery pole sheet foil area according to claim 1, characterized in that: The power mechanism comprises a motor (19) which is coaxially connected to the upper roller (2) and the lower roller (3) via a coupling.

Images