Lithium battery pole piece thickness control device

Abstract

The utility model discloses a lithium battery pole piece thickness control device which comprises a base, the upper surface of the base is fixedly connected with a fixing frame, the rear surface of the fixing frame is fixedly connected with a driving motor, the output end of the driving motor is fixedly connected with a driving roller, and the inner surface of the fixing frame is slidably connected with an adjusting block. An extrusion roller is rotatably connected to the inner surface of the adjusting block, a connecting rod is fixedly connected to the upper surface of the adjusting block, a first adjusting frame is fixedly connected to the upper surface of the connecting rod, and through the arrangement of the two guide frames, a pole piece to be compacted can be conveniently guided and accurately guided to the center position of the extrusion roller, and it is guaranteed that the position of the pole piece is accurate; the compaction quality of the pole piece is improved, the surface and structural integrity of the pole piece is protected, the motor drives the two-way screw rod to rotate so as to drive the supporting block to move to adjust the distance between the guide frames, the device can be suitable for guiding the pole pieces of different specifications, and the applicability of the device is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium battery pole piece production, in particular to a lithium battery pole piece thickness control device. Background Art

[0002] A lithium battery pole piece is a lithium battery component consisting of a current collector and an active material coating. The current collector is generally a metal foil. Aluminum foil is usually used for the positive electrode because aluminum is relatively stable under high potentials; copper foil is mostly used for the negative electrode because it has good conductivity. In order to compact the pole piece, increase the bonding force between the active material and the current collector, and further control the thickness and density of the pole piece, a certain pressure needs to be applied to the pole piece by a roller press during the production process of the pole piece to compact the active material coating.

[0003] In the process of compacting the electrode sheets by the existing roller press, the electrode sheets are prone to shifting during the rolling process due to their uneven thickness, and moving left and right between the two squeezing rollers, which can easily lead to uneven thickness of the compacted electrode sheets. At the same time, it will interfere with the distribution of active materials in the electrode sheets, causing uneven distribution of active materials, affecting the charge and discharge performance of the electrode sheets, and ultimately affecting the quality of the lithium battery. Utility Model Content

[0004] The utility model aims to provide a lithium battery pole piece thickness control device, which is convenient for guiding the pole piece to be compacted, accurately guiding the pole piece to the center position of the extrusion roller, ensuring the precise position of the pole piece, improving the pole piece compaction quality, and protecting the pole piece surface and structural integrity.

[0005] The utility model also provides the above-mentioned lithium battery pole piece thickness control device, comprising: a base, the upper surface of the base is fixedly connected to a fixing frame, the rear surface of the fixing frame is fixedly connected to a driving motor, the output end of the driving motor is fixedly connected to a driving roller, the inner surface of the fixing frame is slidably connected to an adjusting block, the inner surface of the adjusting block is rotatably connected to an extrusion roller, the upper surface of the adjusting block is fixedly connected to a connecting rod, the upper surface of the connecting rod is fixedly connected to a first adjusting frame, and the inner surface of the first adjusting frame is threadedly connected to a first adjusting rod;

[0006] The rear surface of the base is fixedly connected to an adjusting motor, an output end of the adjusting motor is fixedly connected to a bidirectional screw, an outer surface of the bidirectional screw is threadedly connected to a supporting block, an upper surface of the supporting block is fixedly connected to a guide frame, a guide roller is provided inside the guide frame, a second adjusting rod is threadedly connected to an inner surface of the guide frame, a second adjusting frame is rotatably connected to a lower surface of the second adjusting rod, a sliding groove is provided on a side wall of the second adjusting frame, a spring is fixedly connected to an upper surface of the sliding groove, a sliding block is fixedly connected to a lower end of the spring, and a roller is rotatably connected to an inner surface of the sliding block.

[0007] According to the lithium battery pole piece thickness control device, the front surface of the fixed frame is fixedly connected to a transmission box, a limiting groove is provided on the transmission box, the outer surface of the driving roller is fixedly connected to a driving gear, the outer surface of the squeezing roller is fixedly connected to a driven gear, the outer surface of the driving gear is meshingly connected to a fixed gear, the inner surface of the fixed gear is fixedly connected to a fixed shaft, the outer surface of the fixed shaft is rotatably connected to a first connecting frame, the inner surface of the end of the first connecting frame away from the fixed shaft is rotatably connected to a connecting shaft, the end of the connecting shaft away from the first connecting frame is fixedly connected to a connecting gear, and the outer surface of the connecting shaft is rotatably connected to a second connecting frame, so as to facilitate the connection of the driving roller with the squeezing roller, and facilitate the synchronous rotation of the two rollers driven by a motor to extrude the pole piece.

[0008] According to the lithium battery pole piece thickness control device, the outer surface of the connecting shaft is slidably connected to the limit groove, the outer surface of the driven gear is meshingly connected to the connecting gear, the outer surface of the connecting gear is meshingly connected to the fixed gear, the inner surface of the end of the second connecting frame away from the connecting shaft is rotatably connected to the extrusion roller, the outer surface of the fixed shaft is rotatably connected to the transmission box, and the outer surface of the driving roller is rotatably connected to the transmission box, which facilitates the rotation of multiple gears and ensures that the multiple gears can always remain connected for transmission.

[0009] According to the lithium battery pole piece thickness control device, the outer surface of the bidirectional screw is rotatably connected to the base, and the outer surface of the support block is slidably connected to the base, so that the bidirectional screw rotates to drive the support block to move, thereby driving the guide frame to move and adjust the spacing of the guide frames.

[0010] According to the lithium battery pole piece thickness control device, a guide rod is fixedly connected to the upper surface of the second adjustment frame, the outer surface of the guide rod is slidably connected to the guide frame, and the outer surface of the slider is slidably connected to the slide groove, so as to guide the moving direction of the second adjustment frame, improve the stability of the movement of the second adjustment frame, and prevent the second adjustment frame from rotating. The pressure of the spring on the slider can ensure that the roller can always be in contact with the pole piece, so as to avoid the uneven thickness of the pole piece affecting the use of the roller.

[0011] According to the lithium battery pole piece thickness control device, the end of the bidirectional screw away from the adjusting motor is fixedly connected to a synchronous wheel, and the two synchronous wheels are driven by a synchronous belt, which is convenient for connecting the two bidirectional screws so that the two bidirectional screws can rotate synchronously.

[0012] According to the lithium battery pole piece thickness control device, the outer surface of the connecting rod is slidably connected to the fixing frame, and the outer surface of the first adjusting rod is rotatably connected to the fixing frame.

[0013] According to the lithium battery pole piece thickness control device, the outer surface of the driving roller is rotatably connected to the fixing frame, the driving motor and the regulating motor are both electrically connected to an external power source, and the lower surface of the base is fixedly connected to a bracket.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] 1. The two guide frames are arranged to facilitate the guidance of the pole piece to be compacted, and accurately guide the pole piece to the center position of the extrusion roller, thereby ensuring the precise position of the pole piece, improving the compaction quality of the pole piece, and protecting the surface and structural integrity of the pole piece.

[0016] 2. The motor drives the bidirectional screw to rotate, thereby driving the support block to move and adjust the spacing of the guide frame. It can be suitable for guiding pole pieces of different specifications and improve the applicability of the device.

[0017] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The utility model is further described below in conjunction with the accompanying drawings and embodiments;

[0019] Figure 1 This is the overall structure diagram of the lithium battery pole piece thickness control device of the utility model;

[0020] Figure 2 This is a cross-sectional view of the overall bidirectional screw of the lithium battery pole piece thickness control device of the utility model;

[0021] Figure 3 for Figure 2 The enlarged schematic diagram at A in the middle;

[0022] Figure 4 This is a cross-sectional view of the overall fixing frame of the lithium battery pole piece thickness control device of the utility model;

[0023] Figure 5 This is a cross-sectional view of the transmission box of the lithium battery pole piece thickness control device of the utility model.

[0024] Legend:

[0025] 1. Base; 2. Fixed frame; 3. Driving motor; 4. Driving roller; 5. Adjusting block; 6. Extrusion roller; 7. Connecting rod; 8. First adjusting frame; 9. First adjusting rod; 10. Driving gear; 11. Fixed gear; 12. Fixed shaft; 13. First connecting frame; 14. Connecting shaft; 15. Connecting gear; 16. Second connecting frame; 17. Driven gear; 18. Transmission box; 19. Limiting groove; 20. Adjusting motor; 21. Bidirectional screw; 22. Support block; 23. Guide frame; 24. Guide roller; 25. Second adjusting rod; 26. Second adjusting frame; 27. Slide groove; 28. Sliding block; 29. ​​Spring; 30. Roller; 31. Guide rod; 32. Bracket; 33. Synchronous wheel; 34. Synchronous belt. DETAILED DESCRIPTION

[0026] This section will describe in detail the specific embodiments of the utility model. The preferred embodiments of the utility model are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the utility model, but it cannot be understood as a limitation on the protection scope of the utility model.

[0027] Reference Figure 1-5 The lithium battery pole piece thickness control device of the utility model embodiment comprises: a base 1, a bracket 32 ​​is fixedly connected to the lower surface of the base 1, a fixing frame 2 is fixedly connected to the upper surface of the base 1, a driving motor 3 is fixedly connected to the rear surface of the fixing frame 2, a driving roller 4 is fixedly connected to the output end of the driving motor 3, the outer surface of the driving roller 4 is rotatably connected to the fixing frame 2, an adjusting block 5 is slidably connected to the inner surface of the fixing frame 2, an extrusion roller 6 is rotatably connected to the inner surface of the adjusting block 5, a connecting rod 7 is fixedly connected to the upper surface of the adjusting block 5, the outer surface of the connecting rod 7 is slidably connected to the fixing frame 2, a first adjusting frame 8 is fixedly connected to the upper surface of the connecting rod 7, a first adjusting rod 9 is threadedly connected to the inner surface of the first adjusting frame 8 for easy rotation, driving the first adjusting frame 8 to move and driving the extrusion roller 6 to move through the connecting rod 7, so as to adjust the distance between the extrusion roller 6 and the driving roller 4, and the outer surface of the first adjusting rod 9 is rotatably connected to the fixing frame 2.

[0028] An adjusting motor 20 is fixedly connected to the rear surface of the base 1. The driving motor 3 and the adjusting motor 20 are both electrically connected to an external power supply. A bidirectional screw 21 is fixedly connected to the output end of the adjusting motor 20, so as to drive the support block 22 to move and adjust the spacing between the two guide frames 23, so as to ensure that the pole piece can be at the center position of the extrusion roller 6 and the driving roller 4. A synchronous wheel 33 is fixedly connected to the end of the bidirectional screw 21 away from the adjusting motor 20. The two synchronous wheels 33 are driven by a synchronous belt 34 so that the two bidirectional screws 21 can rotate synchronously. The outer surface of the bidirectional screw 21 is rotatably connected to the base 1. The outer surface of the bidirectional screw 21 is threadedly connected to the support block 22. The outer surface of the support block 22 is slidably connected to the base 1. The upper surface of the support block 22 is fixedly connected to the guide frame 23. A guide roller 24 is arranged inside the guide frame 23 to reduce the friction between the pole piece and the guide frame 23. At the same time, the guide rollers arranged vertically on both sides 24 can limit the position of the pole piece under the action of the guide frame 23 to prevent the pole piece from being easily displaced during the rolling process, reduce the energy consumption of the drive motor 3 while protecting the pole piece, and prevent damage caused by friction between the pole piece and the guide frame 23. The inner surface of the guide frame 23 is threadedly connected with a second adjusting rod 25, and the lower surface of the second adjusting rod 25 is rotatably connected with the second adjusting frame 26. The upper surface of the second adjusting frame 26 is fixedly connected with a guide rod 31, and the outer surface of the guide rod 31 is slidably connected to the guide frame 23. The side wall of the second adjusting frame 26 is provided with a slide groove 27, and the upper surface of the slide groove 27 is fixedly connected with a spring 29, which can buffer the force generated by the uneven pole piece on the roller 30, and can ensure that the roller 30 is always in contact with the pole piece. The outer surface of the slider 28 is slidably connected to the slide groove 27, and the lower end of the spring 29 is fixedly connected with the slider 28, and the inner surface of the slider 28 is rotatably connected with the roller 30.

[0029] The front surface of the fixed frame 2 is fixedly connected to a transmission box 18 to protect the internal transmission structure. The outer surface of the driving roller 4 is rotatably connected to the transmission box 18. A limiting groove 19 is provided on the transmission box 18 to guide the movement of the connecting shaft 14. The outer surface of the driving roller 4 is fixedly connected to a driving gear 10. The outer surface of the squeezing roller 6 is fixedly connected to a driven gear 17. The outer surface of the driving gear 10 is meshingly connected to a fixed gear 11. The inner surface of the fixed gear 11 is fixedly connected to a fixed shaft 12. The outer surface of the fixed shaft 12 is rotatably connected to the transmission box 18. The outer surface of the fixed shaft 12 is rotatably connected to a first connecting frame 13, which connects the fixed shaft 12 to the connecting shaft 14 to ensure that the fixed gear 11 is in contact with the connecting shaft 14. The connecting gears 15 are always connected, the inner surface of the end of the first connecting frame 13 away from the fixed shaft 12 is rotatably connected to the connecting shaft 14, the outer surface of the connecting shaft 14 is slidably connected to the limiting groove 19, the end of the connecting shaft 14 away from the first connecting frame 13 is fixedly connected to the connecting gear 15, the outer surface of the connecting gear 15 is meshed and connected with the fixed gear 11, the outer surface of the driven gear 17 is meshed and connected with the connecting gear 15, the outer surface of the connecting shaft 14 is rotatably connected to the second connecting frame 16, the connecting shaft 14 is connected to the extrusion roller 6 to ensure that the driven gear 17 and the connecting gear 15 are always connected, and the inner surface of the end of the second connecting frame 16 away from the connecting shaft 14 is rotatably connected to the extrusion roller 6.

[0030] Working principle: Start the adjusting motor 20 to drive the bidirectional screw 21 to rotate, and the two bidirectional screws 21 are synchronously rotated through the connection between the synchronous wheel 33 and the synchronous belt 34. The rotation of the bidirectional screw 21 drives the support block 22 to move, thereby driving the guide frame 23 to move to adjust the spacing between the two guide frames 23, and rotating the second adjusting rod 25 drives the second adjusting frame 26 to move so that the roller 30 presses the pole piece. Under the action of the spring 29, the slider 28 can drive the roller 30 to always fit with the pole piece to avoid the uneven thickness of the pole piece affecting the use of the roller 30. The setting of the guide roller 24 can reduce the friction between the pole piece and the guide frame 23 to avoid damage to the pole piece. At the same time, the guide rollers 24 arranged vertically on both sides can limit the position of the pole piece under the action of the guide frame 23 to avoid the pole piece on the roller If displacement occurs during the pressing process, the pole piece can be rotated by the first adjusting rod 9 to drive the first adjusting frame 8 to move, thereby driving the adjusting block 5 to move through the connecting rod 7 to adjust the distance between the squeezing roller 6 and the driving roller 4, and starting the driving motor 3 to drive the driving roller 4 to rotate. The driving roller 4 rotates and drives the driving gear 10 to rotate. Through the meshing connection between the fixed shaft 12, the connecting gear 15, and the driven gear 17, the driving gear 10 rotates and drives the driven gear 17 to rotate, thereby realizing the synchronous rotation of the driving roller 4 and the squeezing roller 6 to compact the pole piece. When the squeezing roller 6 moves, the connecting shaft 14 is driven by the second connecting frame 16 to slide along the limiting groove 19. The first connecting frame 13 and the second connecting frame 16 can ensure that the fixed gear 11, the connecting gear 15, and the driven gear 17 are always connected for transmission.

[0031] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments. Various changes can be made within the knowledge scope of ordinary technicians in the technical field without departing from the purpose of the present invention.

Claims

1. A lithium battery pole piece thickness control device, characterized in that: include: A base (1), wherein the upper surface of the base (1) is fixedly connected to a fixing frame (2), the rear surface of the fixing frame (2) is fixedly connected to a driving motor (3), the output end of the driving motor (3) is fixedly connected to a driving roller (4), the inner surface of the fixing frame (2) is slidably connected to an adjusting block (5), the inner surface of the adjusting block (5) is rotatably connected to a squeezing roller (6), the upper surface of the adjusting block (5) is fixedly connected to a connecting rod (7), the upper surface of the connecting rod (7) is fixedly connected to a first adjusting frame (8), and the inner surface of the first adjusting frame (8) is threadedly connected to a first adjusting rod (9); The rear surface of the base (1) is fixedly connected to an adjusting motor (20), the output end of the adjusting motor (20) is fixedly connected to a bidirectional screw (21), the outer surface of the bidirectional screw (21) is threadedly connected to a supporting block (22), the upper surface of the supporting block (22) is fixedly connected to a guide frame (23), a guide roller (24) is arranged inside the guide frame (23), the inner surface of the guide frame (23) is threadedly connected to a second adjusting rod (25), the lower surface of the second adjusting rod (25) is rotatably connected to a second adjusting frame (26), a side wall of the second adjusting frame (26) is provided with a slide groove (27), the upper surface of the slide groove (27) is fixedly connected to a spring (29), the lower end of the spring (29) is fixedly connected to a sliding block (28), and the inner surface of the sliding block (28) is rotatably connected to a roller (30).

2. The lithium battery pole piece thickness control device according to claim 1, characterized in that: The front surface of the fixed frame (2) is fixedly connected to a transmission box (18), and a limiting groove (19) is provided on the transmission box (18); the outer surface of the driving roller (4) is fixedly connected to a driving gear (10), and the outer surface of the squeezing roller (6) is fixedly connected to a driven gear (17); the outer surface of the driving gear (10) is meshingly connected to a fixed gear (11), and the inner surface of the fixed gear (11) is fixedly connected to a fixed shaft (12); the outer surface of the fixed shaft (12) is rotatably connected to a first connecting frame (13); the inner surface of an end of the first connecting frame (13) away from the fixed shaft (12) is rotatably connected to a connecting shaft (14); the end of the connecting shaft (14) away from the first connecting frame (13) is fixedly connected to a connecting gear (15), and the outer surface of the connecting shaft (14) is rotatably connected to a second connecting frame (16).

3. The lithium battery pole piece thickness control device according to claim 2, characterized in that: The outer surface of the connecting shaft (14) is slidably connected to the limiting groove (19), the outer surface of the driven gear (17) is meshingly connected to the connecting gear (15), the outer surface of the connecting gear (15) is meshingly connected to the fixed gear (11), the inner surface of one end of the second connecting frame (16) away from the connecting shaft (14) is rotationally connected to the squeezing roller (6), the outer surface of the fixed shaft (12) is rotationally connected to the transmission box (18), and the outer surface of the driving roller (4) is rotationally connected to the transmission box (18).

4. The lithium battery pole piece thickness control device according to claim 1, characterized in that: The outer surface of the bidirectional screw (21) is rotatably connected to the base (1), and the outer surface of the support block (22) is slidably connected to the base (1).

5. The lithium battery pole piece thickness control device according to claim 1, characterized in that: A guide rod (31) is fixedly connected to the upper surface of the second adjustment frame (26); an outer surface of the guide rod (31) is slidably connected to the guide frame (23); and an outer surface of the sliding block (28) is slidably connected to the sliding groove (27).

6. The lithium battery pole piece thickness control device according to claim 1, characterized in that: One end of the bidirectional screw (21) away from the adjustment motor (20) is fixedly connected to a synchronous wheel (33), and the two synchronous wheels (33) are driven by a synchronous belt (34).

7. The lithium battery pole piece thickness control device according to claim 1, characterized in that: The outer surface of the connecting rod (7) is slidably connected to the fixing frame (2), and the outer surface of the first adjusting rod (9) is rotationally connected to the fixing frame (2).

8. The lithium battery pole piece thickness control device according to claim 1, characterized in that: The outer surface of the driving roller (4) is rotatably connected to the fixing frame (2), the driving motor (3) and the regulating motor (20) are both electrically connected to an external power source, and the lower surface of the base (1) is fixedly connected to a bracket (32).

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