Crimping and pole piece production integrated device for metal lithium negative pole piece
By using the oil injection assembly and tension control assembly in the production process of metal lithium electrodes, the problem of sticking of the cutting blade is solved, and smooth cutting and efficient production of metal lithium electrodes are achieved.
Patent Information
- Application Number
- CN202422956171.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-02
- Publication Date
- 2025-10-17
- Estimated Expiration
- 2034-12-02
AI Technical Summary
During the production process of metal lithium electrodes, the cutting blade is prone to sticking to metal lithium debris, resulting in uneven blade edges and problems such as sticking and being unable to cut.
A device for pressing and producing metal lithium negative electrode sheets was designed. The device includes an oil spray component that regularly sprays oil on the cutting blade surface, and is combined with a tension control component and a deviation correction component to ensure smooth cutting of the metal lithium strip and the electrode tab.
It effectively avoids the adhesion of metallic lithium, ensures the smoothness of the cutting blade surface, and improves the cutting integrity and the production efficiency of the electrode.
Smart Images
Figure CN223442390U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to battery pole piece processing technical field, concretely is a kind of metal lithium negative pole piece crimping pole piece sheet making integrated device. BACKGROUND
[0002] With the high-speed development of new energy automobile industry, the demand of power battery grows rapidly, and the energy density requirement of battery is higher and higher. The negative pole of metal lithium battery uses metal lithium pole piece, and its energy density is high, which can provide longer endurance for equipment. In the production process of metal lithium pole piece, cutting knife is usually used to cut metal lithium strip to form piece-shaped metal lithium pole piece. Because lithium has relatively active chemical properties, it needs to be cut better in a specific environment. However, in the actual cutting process, it is difficult to achieve the specific environment, and the following two situations may occur:
[0003] 1. A large amount of metal lithium debris will adhere to the cutting surface of the cutting knife, and the debris adhering to the cutting surface will form hard protrusions. In the subsequent cutting process, the protrusions destroy the flatness of the cutting edge, and thus the cutting edges of the pole piece are uneven, resulting in a high scrap rate.
[0004] 2. The cutting knife will directly adhere to the metal lithium strip during use, which will prevent normal cutting.
[0005] Based on the above situation, the anti-adhesion property of the metal lithium strip cutting device needs to be improved. UTILITY MODEL CONTENTS
[0006] In order to avoid and overcome the technical problems existing in the prior art, the utility model provides a metal lithium negative pole piece crimping pole piece sheet making integrated device. The utility model can effectively prevent metal lithium from adhering to the cutting knife, thereby ensuring the smooth progress of the metal lithium strip cutting work.
[0007] To achieve the above purpose, the utility model provides the following technical scheme:
[0008] A metal lithium negative pole piece crimping pole piece sheet making integrated device includes a lithium strip feeding assembly for providing a metal lithium strip, a tab feeding assembly for providing a tab for the metal lithium strip, and a crimping assembly for crimping the tab on the metal lithium strip during movement of the metal lithium strip. A cutting knife is installed at the discharge port of the lithium strip feeding assembly for cutting the metal lithium strip after crimping the tab. An oil injection assembly is arranged at the cutting knife for oil injection on the cutting surface of the cutting knife.
[0009] As a further scheme of the utility model, the oil injection assembly includes a transverse guide rail arranged parallel to the cutting knife, and an oil injection nozzle is slidably arranged on the transverse guide rail and communicates with an oil injection pot through a hose to inject oil on the cutting surface of the cutting knife.
[0010] As a further scheme of the utility model: one end of the transverse guide rail is provided with an oil injection telescopic rod, the telescopic direction of the oil injection telescopic rod is same with the guide direction of the guide rail, and an oil injection nozzle is installed on the telescopic end of the oil injection telescopic rod;The cutting knife is driven to move up and down through a crank slider mechanism.
[0011] As a further scheme of the utility model: the lithium ribbon feeding assembly comprises a gas expansion shaft installed on the support frame and provided with a set rotation damping, the gas expansion shaft is arranged horizontally in the axial direction, and a metal lithium ribbon roll is coaxially installed on the gas expansion shaft;Two press rollers arranged side by side and parallel are installed on the moving direction of the metal lithium ribbon, and one of the two press rollers is a driving part driven by a rotation power source;A material passing gap is formed between the two press rollers and the metal lithium ribbon is pulled out under the traction of the driving part;A tension control assembly for adjusting the tension of the metal lithium ribbon is installed between the gas expansion shaft and the press roller.
[0012] As a further scheme of the utility model: the tension control assembly comprises a reversing roller for reversing the winding of the metal lithium ribbon and rotatably installed on the support frame, the axial direction of each reversing roller is parallel to the axial direction of the gas expansion shaft, and each reversing roller is arranged along an S-shaped path;The support frame is further hingedly provided with a swing rod for adjusting and locking the swing angle through a swing power source, the hinge axis of the swing rod is parallel to the axis of the gas expansion shaft, and one of the reversing rollers is rotatably installed on the cantilever end of the swing rod.
[0013] As a further scheme of the utility model: a deviation rectifying assembly for rectifying the deviation of the metal lithium ribbon is arranged between the discharge port of the tension control assembly and the press roller of the lithium ribbon feeding assembly, the deviation rectifying assembly comprises a guide plate arranged horizontally and allowing the metal lithium ribbon to slide, and deviation rectifying plates respectively arranged on the two side surfaces of the metal lithium ribbon and vertically arranged with the metal lithium ribbon, a channel for the metal lithium ribbon to pass through is formed between the two deviation rectifying plates;The bottom of each metal plate is respectively provided with a position adjusting assembly capable of adjusting the deviation rectifying position along the width direction of the metal lithium ribbon.
[0014] As a further scheme of the utility model: the position adjusting assembly comprises a guide rod installed on the support plate, the length direction of the guide rod is parallel to the axial direction of the gas expansion shaft in the lithium ribbon feeding assembly;A guide block is slidably arranged on the guide rod, the deviation rectifying plate is installed on the guide block;The support frame is further provided with a deviation power source for driving the guide block to move and locking the position of the guide block.
[0015] As a further scheme of the utility model: the structure of the tab feeding assembly is same with the structure of the lithium ribbon feeding assembly, and the axis of the gas expansion shaft in the tab feeding assembly is perpendicular to the axis of the gas expansion shaft in the lithium ribbon feeding assembly;The pressure connecting assembly is installed at the discharge port of the press roller in the tab feeding assembly.
[0016] As a further scheme of the utility model: the pressure joint assembly includes the pressure block that the copper band front end that the pole lug supply assembly outputs is pressed at the edge of the metal lithium band on the guide plate, and the cutting knife that cuts the copper band front end after the pressure block is pressed; the pressure block is fixed on the telescopic end of the first telescopic rod, the cutting knife is fixed on the telescopic end of the second telescopic rod, and the axial direction of the first telescopic rod and the axial direction of the second telescopic rod are both vertically arranged.
[0017] As a further scheme of the utility model: the oil injection telescopic rod, the first telescopic rod, the second telescopic rod and the deviation rectifying power source are all telescopic motors;The rotating power source is a servo motor coaxially connected on the driving member.
[0018] Compared with the prior art, the utility model has the beneficial effects that:
[0019] 1、The utility model can spray oil to the cutting knife regularly, so that the cutting knife surface is always smooth, the sticking of metal lithium can be effectively avoided, the cutting knife surface is always flat, the cutting integrity is improved, and the smooth cutting of the pole piece is ensured.
[0020] 2、The tension control assembly can provide a tension for the metal lithium band and the metal copper band, and the metal lithium band and the metal copper band are pulled flat, so that the specified size can be accurately cut. BRIEF DESCRIPTION OF DRAWINGS
[0021] Fig. 1 It is the side view structure schematic diagram of the cutting knife side in the utility model.
[0022] Fig. 2 It is the side view structure schematic diagram of the tension control assembly in the utility model.
[0023] Fig. 3 It is the top view of the utility model.
[0024] In the drawing: 1, lithium band supply assembly;11, gas expansion shaft;12, metal lithium band roll;13, compression roller;2, pole lug supply assembly;21, metal copper band roll;3, pressure joint assembly;31, first telescopic rod;32, second telescopic rod;4, cutting knife;41, crank slider mechanism;5, oil injection assembly;51, transverse guide rail;52, oil injection nozzle;53, oil injection telescopic rod;6, tension control assembly;61, reversing roller;62, swing lever;63, swing power source;7, deviation rectifying assembly;8, support frame. DETAILED DESCRIPTION
[0025] With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all the other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.
[0026] Please refer to Figs. 1-3 The device of the present application comprises a lithium ribbon supply assembly 1 for providing a metal lithium ribbon, a tab supply assembly 2 for providing a tab for the metal lithium ribbon, and a crimping assembly 3 for crimping the tab on the metal lithium ribbon during movement of the metal lithium ribbon. A cutting knife 4 for cutting the metal lithium ribbon after crimping the tab is installed at the discharge port of the lithium ribbon supply assembly 1. An oil injection assembly 5 for injecting oil on the cutting surface of the cutting knife 4 is arranged at the cutting knife 4.
[0027] The lithium ribbon supply assembly 1 comprises an air expansion shaft 11 installed on a support frame 8. The air expansion shaft 11 is connected with a stepping motor through a shaft coupling. The speed of the air expansion shaft 11 is controlled by controlling the stepping motor, so that the air expansion shaft 11 can rotate at a set rotational damping to avoid excessive unwinding speed. A metal lithium ribbon roll 12 is coaxially sleeved on the air expansion shaft 11, and the diameter of the air expansion shaft 11 is expanded at the same time, so that the metal lithium ribbon roll 12 is fixed on the air expansion shaft 11.
[0028] Then the metal lithium ribbon is manually pulled and sequentially passes through each reversing roller 61 in the tension control assembly 6. Then the metal lithium ribbon is pulled through the passage between the two correction plates, and finally the metal lithium ribbon passes through the compression roller 13 in the lithium ribbon supply assembly 1. Then the servo motor as a rotating power source is started. At this time, the metal lithium ribbon starts to continuously move to the right below the cutting knife 4 under the driving of the compression roller 13.
[0029] During the movement of the metal lithium ribbon, the extension motor as a swing power source 63 pulls the swing rod 62 by adjusting the extension motor. The swing rod 62 pulls the metal lithium ribbon tightly to make the metal lithium ribbon in a proper taut state, which is convenient for cutting. After the metal lithium ribbon moves through the tension control assembly 6, it slides along the upper plate surface of the guide plate. Before the metal lithium ribbon slides along the guide plate, it will first pass through the correction assembly 7 for correction. The extension motor as a correction power source is used to independently adjust the positions of the two correction plates, so that the vertical planes in which the two side surfaces of the metal lithium ribbon lie are coplanar with the vertical planes in which the two side surfaces of the metal lithium ribbon roll 12 lie.
[0030] The structure of the tab supply assembly 2 and the structure of the lithium strip supply assembly 1 are the same, and the tab supply assembly 2 is also arranged with the tension control assembly 6 and the deviation correction assembly 7 in cooperation. The tab supply assembly 2 provides a copper metal strip roll 21. The copper metal strip pulled out by the compression roller 13 and the metal lithium strip are arranged vertically to each other, and the lower strip surface of the copper metal strip and the upper strip surface of the metal lithium strip are attached to each other, so that under the action of the expansion motor as the first expansion rod 31, the compression block can physically compress the front end of the copper strip on the edge of the metal lithium strip. Then the cutter cuts off the front end of the copper strip under the action of the expansion motor as the second expansion rod 32 to form a tab. The continuous movement of the metal lithium strip and the front end of the copper metal strip are sequentially compressed on the metal lithium strip at a set time interval.
[0031] The metal lithium strip with the tab compressed thereon continuously runs to the position directly below the cutting knife 4 under the action of the compression roller 13, at which time the cutting knife 4 installed on the driving end of the crank slider mechanism 41 moves up and down at a set frequency to cut the metal lithium strip, and the cut tab falls onto the negative pressure conveying belt and is conveyed to the next process by the negative pressure conveying belt. According to the working condition of the cutting knife 4 and the sticking condition of the metal lithium strip, the nozzle along the transverse guide rail 51 sprays oil on the cutting knife 4 surface by the expansion motor as the oil spraying expansion rod 53. In order to further improve the anti-sticking effect, the oil nozzle 52 is arranged on both sides of the cutting knife 4.
[0032] The above is only a preferred specific embodiment of the present application, but the protection scope of the present application is not limited thereto, and any person skilled in the art can make equivalent replacement or change according to the technical scheme and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered within the protection scope of the present application.
Claims
1. A device for producing metal lithium negative electrode sheets by pressing and bonding the negative electrode sheets, characterized in that: The invention comprises a lithium strip feeding assembly (1) for providing a lithium metal strip, a tab feeding assembly (2) for providing a tab for the lithium metal strip, and a pressing assembly (3) for pressing the tab onto the lithium metal strip during movement of the lithium metal strip; a cutting knife (4) for cutting the lithium metal strip after the tab is pressed is installed at the discharge port of the lithium strip feeding assembly (1), and an oil spraying assembly (5) for spraying oil on the blade surface of the cutting knife (4) is arranged at the cutting knife (4).
2. The device for producing a metal lithium negative electrode sheet by pressing and bonding the electrode sheet according to claim 1, characterized in that: The oil spray assembly (5) comprises a transverse guide rail (51) arranged parallel to the cutting knife (4), and an oil spray nozzle (52) is slidably arranged on the transverse guide rail (51) and is connected to an oil spray pot through a hose for spraying oil on the blade surface of the cutting knife (4).
3. The device for producing a metal lithium negative electrode sheet by pressing and bonding the electrode sheet according to claim 2, characterized in that: An oil-spraying telescopic rod (53) is installed at one end of the transverse guide rail (51). The telescopic direction of the oil-spraying telescopic rod (53) is the same as that of the guide rail, and an oil-spraying nozzle (52) is installed on the telescopic end of the oil-spraying telescopic rod (53). The cutting knife (4) is driven to move up and down by a crank slider mechanism (41).
4. The device for producing a metal lithium negative electrode sheet by pressing and bonding the negative electrode sheet according to claim 1, 2 or 3, characterized in that: The lithium strip feeding assembly (1) comprises an air-expanding shaft (11) mounted on a support frame (8) and having a set rotational damping, wherein the axial direction of the air-expanding shaft (11) is arranged horizontally, and a metal lithium strip roll (12) is coaxially mounted on the air-expanding shaft (11); two pressure rollers (13) arranged side by side and in parallel are mounted in the moving direction of the metal lithium strip, and one of the pressure rollers is an active component driven by a rotating power source; a feeding gap is formed between the two pressure rollers (13) for clamping and pulling the metal lithium strip out under the traction of the active component; and a tension control assembly (6) for adjusting the tension of the metal lithium strip is mounted between the air-expanding shaft (11) and the pressure roller (13).
5. The device for producing a metal lithium negative electrode sheet by pressing and bonding the electrode sheet according to claim 4, characterized in that: The tension control assembly (6) includes a reversing roller (61) rotatably mounted on a support frame (8) for winding and reversing the direction of the metal lithium strip, the axial direction of each reversing roller (61) being parallel to the axial direction of the air-expansion shaft (11), and each reversing roller (61) being arranged along an S-shaped path; a swing rod (62) is also hingedly mounted on the support frame (8) for adjusting and locking the swing angle through a swing power source (63), the hinge axis of the swing rod (62) being parallel to the axis of the air-expansion shaft (11), and one of the reversing rollers (61) is rotatably mounted on the cantilever end of the swing rod (62).
6. The device for producing a metal lithium negative electrode sheet by pressing and bonding the electrode sheet according to claim 5, characterized in that: A correction component (7) for correcting the deviation of the metal lithium strip is arranged between the discharge port of the tension control component (6) and the pressure roller (13) of the lithium strip feeding component (1). The correction component (7) includes a guide plate with a horizontally arranged plate surface for the metal lithium strip to slide on, and correction plates respectively arranged on both sides of the metal lithium strip and with the plate surfaces perpendicular to the metal lithium strip surface. A channel for the metal lithium strip to pass through is formed between the two correction plates; and a position adjustment component capable of adjusting the correction position along the width direction of the metal lithium strip is respectively arranged at the bottom of the two metal plates.
7. The device for producing a metal lithium negative electrode sheet by pressing and bonding the electrode sheet according to claim 6, characterized in that: The position adjustment assembly comprises a guide rod mounted on a support plate, wherein the rod length direction of the guide rod is parallel to the axial direction of the air expansion shaft (11) in the lithium strip feeding assembly (1); a guide block is slidably arranged on the guide rod, and the correction plate is mounted on the guide block; and a correction power source for driving the guide block to move and locking the position of the guide block is also arranged on the support frame (8).
8. The device for producing a metal lithium negative electrode sheet by pressing and bonding the electrode sheet according to claim 7, characterized in that: The structure of the tab feeding assembly (2) is the same as that of the lithium strip feeding assembly (1), and the axis of the air expansion shaft (11) in the tab feeding assembly (2) and the axis of the air expansion shaft (11) in the lithium strip feeding assembly (1) are perpendicular to each other; the pressing assembly (3) is installed at the discharge port of the pressure roller (13) in the tab feeding assembly (2).
9. The device for producing a metal lithium negative electrode sheet by pressing and bonding the electrode sheet according to claim 8, characterized in that: The crimping assembly (3) comprises a pressing block for crimping the front end of the copper strip output by the tab feeding assembly (2) onto the edge of the metal lithium strip located on the guide plate, and a cutter for cutting the front end of the copper strip after the pressing block is crimped; the pressing block is fixed to the telescopic end of the first telescopic rod (31), the cutter is fixed to the telescopic end of the second telescopic rod (32), and the axial direction of the first telescopic rod (31) and the axial direction of the second telescopic rod (32) are both arranged vertically.
10. The device for producing a metal lithium negative electrode sheet by pressing and bonding the electrode sheet according to claim 9, characterized in that: The oil-injection telescopic rod (53), the first telescopic rod (31), the second telescopic rod (32) and the deviation correction power source are all telescopic motors; the rotation power source is a servo motor coaxially connected to the active component.