A positive and negative electrode sheet coating equipment for lithium ion batteries

Abstract

The utility model relates to electrode film coating technical field discloses a kind of positive and negative electrode sheet film coating equipment for lithium ion battery, including shell, the inside fixedly connected with pneumatic cylinder of shell, the drive end fixedly connected with telescopic column of pneumatic cylinder, the outside fixedly connected with connecting rod of telescopic column, the rear end fixedly connected with fixed column one of connecting rod, the bottom end fixedly connected with extruding disc of fixed column one, the bottom end rotationally connected with rotating rod of connecting rod, the bottom end rotationally connected with rotating shaft of rotating rod, the outside rotationally connected with central shaft of rotating shaft, the bottom end rotationally connected with driven rod of central shaft, the inside fixedly connected with sputtering chamber of shell.In the utility model, start electric field generator, high voltage electric field is applied to shell, ion is generated, ion is high-speed bombardment target material under the action of electric field, so that target material surface atom sputtering is deposited with electrode sheet surface contact and forms uniform film.

Description

Technical Field

[0001] This utility model relates to the field of electrode coating technology, and in particular to a coating equipment for positive and negative electrodes for lithium-ion batteries. Background Technology

[0002] The coating equipment for positive and negative electrodes of lithium-ion batteries is mainly used for coating the positive and negative electrodes of lithium-ion batteries. Through precise control of film thickness and uniform coating structure, it ensures that the electrodes maintain good electrochemical performance and structural stability during the coating process. It is suitable for manufacturing scenarios in lithium-ion battery production where functional coating of positive and negative electrodes is performed to improve battery performance.

[0003] The coating equipment for positive and negative electrodes of lithium-ion batteries mainly consists of a conveying mechanism and a coating assembly. Its working principle is that the conveying mechanism transports the positive and negative electrodes to be coated to the coating area, and the coating assembly uniformly deposits functional materials on the surface of the electrode through vacuum evaporation or magnetron sputtering, thereby realizing a high-efficiency and high-quality coating process for positive and negative electrodes of lithium-ion batteries.

[0004] Traditional lithium-ion battery positive and negative electrode coating equipment suffers from vibrations during machine operation and resonance caused by the linkage of various mechanical components during the coating process. This can lead to displacement or misalignment of the positive and negative electrodes in the coating state, resulting in deviations in the relative positions of the electrodes and the coating components. Consequently, the film deposition is uneven and the thickness fluctuates excessively. To address these issues, a new lithium-ion battery positive and negative electrode coating equipment is proposed. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides a coating equipment for positive and negative electrode sheets of lithium-ion batteries, which aims to improve the problem in the prior art where vibrations generated during machine operation cause the positive and negative electrode sheets in the coating state to shift or become misaligned.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A coating device for positive and negative electrodes of lithium-ion batteries includes a housing. A cylinder is fixedly connected inside the housing. A telescopic column is fixedly connected to the driving end of the cylinder. A connecting rod is fixedly connected to the outside of the telescopic column. A fixing column is fixedly connected to the rear end of the connecting rod. An extrusion plate is fixedly connected to the bottom end of the fixing column. A rotating rod is rotatably connected to the bottom end of the connecting rod. A rotating shaft is rotatably connected to the bottom end of the rotating rod. A central shaft is rotatably connected to the outside of the rotating shaft. A driven rod is rotatably connected to the bottom end of the central shaft. A sputtering chamber is fixedly connected inside the housing. A fixing plate is fixedly connected inside the housing. A target material is fixedly connected to the right end of the fixing plate. A cleaning component is provided on the outside of the target material.

[0008] As a further description of the above technical solution:

[0009] The cleaning assembly includes a motor, which is externally fixedly connected to the inside of the target material. A rotating column is fixedly connected to the drive end of the motor. A cleaning outer plate is fixedly connected to the outside of the rotating column. A cleaning inner plate is slidably connected to the inside of the cleaning outer plate. A fixing column two is fixedly connected to the bottom end of the cleaning inner plate.

[0010] As a further description of the above technical solution:

[0011] An air pump is fixedly connected to the bottom of the housing, and an electric field generator is fixedly connected to the top of the housing.

[0012] As a further description of the above technical solution:

[0013] An air inlet is fixedly connected to the top of the housing, and an electrode plate is provided inside the sputtering chamber;

[0014] As a further description of the above technical solution:

[0015] The bottom end of the extrusion disc is in contact with the outside of the electrode sheet, and the fixing column is slidably connected to the inside of the sputtering chamber;

[0016] As a further description of the above technical solution:

[0017] The target material has a groove inside, and the second fixing column is slidably connected to the inside of the groove.

[0018] As a further description of the above technical solution:

[0019] The rotating column is rotatably connected to the top of the target material, and the cleaning outer plate is slidably connected to the top of the target material.

[0020] As a further description of the above technical solution:

[0021] The outer surface of the cleaning inner plate is slidably connected to the top of the target material, and the interior of the sputtering chamber is provided with a cavity.

[0022] This utility model has the following beneficial effects:

[0023] 1. In this utility model, the electrode sheet is placed on the top of the extrusion plate. The cylinder is started, and the cylinder drives the telescopic column to move the connecting rod. After reaching the designated position, the extrusion plate contacts the electrode sheet. At the same time, the connecting rod drives the rotating rod to rotate, causing the driven rod to rotate. This causes the extrusion plate at the other end of the electrode sheet to move upward and contact it, thus fixing the position of the electrode sheet and avoiding changes in position due to machine vibration, which would affect the coating effect. After the position is fixed, the vacuum pump is started to extract the air from the shell, and then inert gas is introduced from the air inlet. Subsequently, the electric field generator is started to apply a high-voltage electric field to the shell, generating ions. Under the action of the electric field, the ions bombard the target material at high speed, causing the atoms on the target material surface to sputter and contact the surface of the electrode sheet and deposit, forming a uniform thin film.

[0024] 2. In this utility model, the motor is started, and the motor drives the rotating column to rotate, so that the cleaning outer plate and the cleaning inner plate scrape the surface of the target material. Through repeated scraping by the cleaning outer plate and the cleaning inner plate, the agglomerated crystals remaining on the surface of the electrode sheet after coating are removed, avoiding uneven distribution of sputtered particles, thereby improving the uniformity and purity of coating, reducing defects such as thickness fluctuation during electrode sheet coating, and ensuring that the target material works continuously in a more uniform state. Attached Figure Description

[0025] Figure 1 This is a three-dimensional schematic diagram of a coating device for positive and negative electrodes of a lithium-ion battery proposed in this utility model.

[0026] Figure 2 This is a schematic diagram of the central shaft of a lithium-ion battery positive and negative electrode coating equipment proposed in this utility model.

[0027] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0028] Figure 4 This is a schematic diagram of the target material for a lithium-ion battery positive and negative electrode coating equipment proposed in this utility model.

[0029] Legend:

[0030] 1. Housing; 2. Cylinder; 3. Telescopic column; 4. Connecting rod; 5. Fixed column one; 6. Extrusion plate; 7. Electrode sheet; 8. Rotating rod; 9. Rotating shaft; 10. Central shaft; 11. Driven rod; 12. Sputtering chamber; 13. Fixing plate; 14. Target material; 15. Motor; 16. Rotating column; 17. Cleaning outer plate; 18. Cleaning inner plate; 19. Fixed column two; 20. Air pump; 21. Electric field generator; 22. Air inlet. Detailed Implementation

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

[0032] Reference Figures 1 to 3 This utility model provides an embodiment of a lithium-ion battery positive and negative electrode coating equipment, including a housing 1. The housing 1 provides a stable mounting base for a cylinder 2. The cylinder 2 is fixedly connected inside the housing 1. The cylinder 2 provides power for the movement of a telescopic column 3. The drive end of the cylinder 2 is fixedly connected to the telescopic column 3. The telescopic column 3 can transmit the power output by the cylinder 2 to a connecting rod 4. The telescopic column 3 is fixedly connected to the outside of the connecting rod 4. The connecting rod 4 can synchronously transmit the movement of the telescopic column 3 to a fixed column 5 and a rotating rod 8. The rear end of the connecting rod 4 is fixedly connected to the fixed column 5. The fixed column 5 can slide in the sputtering chamber 12 with the movement of the connecting rod 4. The bottom end of the fixed column 5 is fixedly connected to an extrusion plate 6. The extrusion plate 6 contacts the electrode sheet 7 and can apply pressure to the electrode sheet 7 to limit its position.

[0033] A rotating rod 8 is rotatably connected to the bottom end of the connecting rod 4. The movement of the rotating rod 8 drives the driven rod 11 to move. A rotating shaft 9 is rotatably connected to the bottom end of the rotating rod 8. The rotating shaft 9 rotates under the drive of the rotating rod 8, providing power for the movement of the central shaft 10. The central shaft 10 is rotatably connected to the outside of the rotating shaft 9. The central shaft 10 transmits the movement of the rotating rod 8 to the driven rod 11. The driven rod 11 is rotatably connected to the bottom end of the central shaft 10. The driven rod 11 rotates under the drive of the rotating rod 8, enabling the extrusion disc 6 at the other end of the electrode sheet 7 to move synchronously. The housing 1... The internal sputtering chamber 12 is fixedly connected, providing an independent space for the coating process of the electrode sheet 7. The internal fixing plate 13 is fixedly connected to the housing 1, which can fix and support the target material 14, ensuring that the target material 14 remains stable during ion bombardment. The right end of the fixing plate 13 is fixedly connected to the target material 14. The atoms on the surface of the target material 14 will be sputtered out under ion bombardment and can be used to form a thin film on the surface of the electrode sheet 7. The external part of the target material 14 is provided with a cleaning component, which can clean the surface of the target material 14 to avoid residual impurities affecting the sputtering effect.

[0034] A vacuum pump 20 is fixedly connected to the bottom of the housing 1. The vacuum pump 20 can extract the air inside the housing 1 to create a vacuum environment suitable for coating. An electric field generator 21 is fixedly connected to the top of the housing 1. The electric field generator 21 can generate a high voltage electric field to ionize the inert gas and form ions. An air inlet 22 is fixedly connected to the top of the housing 1. The inert gas enters the interior of the housing 1 through the air inlet 22. An electrode plate 7 is provided inside the sputtering chamber 12. The atoms sputtered by the target material 14 will be deposited on the surface of the electrode plate 7 to form a thin film. The bottom end of the extrusion disk 6 is in contact with the outside of the electrode plate 7. The contact can apply pressure to the electrode plate 7 to prevent it from shifting due to vibration during equipment operation. A fixing column 5 is slidably connected inside the sputtering chamber 12. Through the slidable connection between the fixing column 5 and the sputtering chamber 12, the fixing column 5 can drive the extrusion disk 6 to move inside the sputtering chamber 12, thereby fixing the position of the electrode plate 7.

[0035] Reference Figure 1 and Figure 4 The cleaning assembly includes a motor 15, which provides power for the rotation of the rotating column 16. The motor 15 is externally fixedly connected to the inside of the target material 14, and the target material 14 provides a mounting platform for the motor 15. The drive end of the motor 15 is fixedly connected to the rotating column 16. The movement of the rotating column 16 drives the outer cleaning plate 17 to move. The outer cleaning plate 17 is fixedly connected to the outside of the rotating column 16. The outer cleaning plate 17 rotates with the rotating column 16 and can scrape and clean the surface of the target material 14. The inner cleaning plate 18 is slidably connected inside the outer cleaning plate 17. The inner cleaning plate 18 can slide inside the outer cleaning plate 17 to expand the cleaning range and improve the cleaning effect. The bottom end of the inner cleaning plate 18 is fixedly connected to a second fixing column 19, which can limit the movement trajectory of the inner cleaning plate 18 and make it move along a specific path. The target material 14 has a sliding groove inside, which provides a channel for the sliding of the second fixing column 19, so that the inner cleaning plate 18 moves along a specified trajectory.

[0036] The external of the fixed column 19 is slidably connected to the inside of the slide groove. Through the slid connection, the fixed column 19 can drive the inner cleaning plate 18 to slide in the slide groove. The external of the rotating column 16 is rotatably connected to the top of the target material 14. The rotating column 16 can provide a fulcrum for the rotation of the outer cleaning plate 17. The external of the outer cleaning plate 17 is slidably connected to the top of the target material 14. By sliding the outer cleaning plate 17 on the top of the target material 14, the surface of the target material 14 is scraped to remove residual agglomerated crystals. The external of the inner cleaning plate 18 is slidably connected to the top of the target material 14. The inner cleaning plate 18 slides on the top of the target material 14. The inner cleaning plate 18 and the outer cleaning plate 17 cooperate to expand the cleaning range. The sputtering chamber 12 has a cavity inside, which facilitates the sputtering of atoms from the surface of the target material 14 to contact the surface of the electrode sheet 7 and deposit on its surface.

[0037] Working principle: When the operator uses the lithium-ion battery positive and negative electrode coating equipment, the electrode sheet 7 is placed on the top of the extrusion plate 6. The cylinder 2 is started, and the cylinder 2 drives the telescopic column 3 to move the connecting rod 4. When it moves to the designated position, the extrusion plate 6 contacts the electrode sheet 7. At the same time, the connecting rod 4 moves and drives the rotating rod 8 to rotate. The rotating rod 8 drives the driven rod 11 to rotate, so that the extrusion plate 6 at the other end of the electrode sheet 7 moves upward and contacts the electrode sheet 7, thus fixing the position of the electrode sheet 7. This prevents the position of the electrode sheet 7 from constantly changing due to the vibration generated by the machine during operation, which would affect the final coating effect. After the position of the electrode sheet 7 is fixed, the air pump 20 is started to extract the air from the inside of the housing 1, and inert gas is introduced into the inside of the housing 1 through the air inlet 22. The electric field generator 21 is started to apply a high voltage electric field to the inside of the housing 1, so that the gas is ionized to generate plasma. The ions bombard the target material 14 at high speed under the action of the electric field, so that the atoms on the surface of the target material 14 are sputtered out and come into contact with the surface of the electrode sheet 7 and are deposited on its surface to form a uniform thin film.

[0038] When the lithium-ion battery positive and negative electrode coating equipment is used, the motor 15 is started. The motor 15 drives the rotating column 16 to rotate. The rotation of the rotating column 16 causes the cleaning outer plate 17 and the cleaning inner plate 18 to scrape the surface of the target material 14. Through the repeated scraping of the cleaning outer plate 17 and the cleaning inner plate 18 on the surface of the target material 14, the agglomerated crystals remaining on the surface of the electrode sheet 7 after coating are removed, avoiding uneven distribution of sputtered particles caused by agglomerated crystals. This improves the uniformity and purity of the coating, reduces defects such as thickness fluctuations in the coating process of the electrode sheet 7, and allows the target material 14 to work continuously in a more uniform state.

[0039] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A coating apparatus for positive and negative electrodes for lithium-ion batteries, comprising a housing (1), characterized in that: A cylinder (2) is fixedly connected inside the housing (1). A telescopic column (3) is fixedly connected to the drive end of the cylinder (2). A connecting rod (4) is fixedly connected to the outside of the telescopic column (3). A fixing column (5) is fixedly connected to the rear end of the connecting rod (4). An extrusion plate (6) is fixedly connected to the bottom end of the fixing column (5). A rotating rod (8) is rotatably connected to the bottom end of the connecting rod (4). A rotating shaft (9) is rotatably connected to the bottom end of the rotating rod (8). A central shaft (10) is rotatably connected to the outside of the rotating shaft (9). A driven rod (11) is rotatably connected to the bottom end of the central shaft (10). A sputtering chamber (12) is fixedly connected inside the housing (1). A fixing plate (13) is fixedly connected inside the housing (1). A target material (14) is fixedly connected to the right end of the fixing plate (13). A cleaning component is provided on the outside of the target material (14).

2. The lithium-ion battery positive and negative electrode coating equipment according to claim 1, characterized in that: The cleaning assembly includes a motor (15), which is externally fixedly connected to the inside of the target material (14). A rotating column (16) is fixedly connected to the drive end of the motor (15). A cleaning outer plate (17) is fixedly connected to the outside of the rotating column (16). A cleaning inner plate (18) is slidably connected to the inside of the cleaning outer plate (17). A fixing column two (19) is fixedly connected to the bottom end of the cleaning inner plate (18).

3. The coating equipment for positive and negative electrodes of lithium-ion batteries according to claim 1, characterized in that: An air pump (20) is fixedly connected to the bottom end of the housing (1), and an electric field generator (21) is fixedly connected to the top end of the housing (1).

4. The coating equipment for positive and negative electrodes of lithium-ion batteries according to claim 1, characterized in that: An air inlet (22) is fixedly connected to the top of the housing (1), and an electrode plate (7) is provided inside the sputtering chamber (12).

5. The coating equipment for positive and negative electrodes of lithium-ion batteries according to claim 4, characterized in that: The bottom end of the extrusion disc (6) is in contact with the outside of the electrode sheet (7), and the fixing column (5) is slidably connected to the inside of the sputtering chamber (12).

6. The coating equipment for positive and negative electrodes of lithium-ion batteries according to claim 2, characterized in that: The target material (14) has a groove inside, and the fixed column 2 (19) is slidably connected to the inside of the groove.

7. The coating equipment for positive and negative electrodes of lithium-ion batteries according to claim 2, characterized in that: The rotating column (16) is externally rotatably connected to the top of the target material (14), and the cleaning outer plate (17) is externally slidably connected to the top of the target material (14).

8. The coating equipment for positive and negative electrodes of lithium-ion batteries according to claim 2, characterized in that: The outer side of the cleaning inner plate (18) is slidably connected to the top of the target material (14), and the interior of the sputtering chamber (12) is provided with a cavity.

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