Current collector coating and winding device

Abstract

The utility model discloses a current collector coating and winding device which comprises a coating and winding workbench, a feeding roller, a deviation rectifying mechanism and a winding roller. A first guide roller, a plurality of tensioning rollers and a second guide roller are sequentially arranged between the feeding roller and the winding roller, the deviation rectifying mechanism comprises a deviation rectifying displacement assembly and a deviation rectifying support connected with the deviation rectifying displacement assembly, and a deviation rectifying roller parallel to the feeding roller is arranged on the deviation rectifying support. The deviation rectifying displacement assembly can drive the deviation rectifying support to move back and forth in the first direction. According to the utility model, automatic deviation correction is realized in a current collector coating and conveying process, so that the winding efficiency of the current collector is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of current collector processing, in particular to a current collector coating winding device. Background Art

[0002] In the field of lithium-ion battery technology, the recently emerged composite current collector has become a strong competitor to metal aluminum and copper foil current collectors due to its light and thin characteristics. It is considered to be one of the preferred solutions to improve the safety and energy density of lithium-ion batteries and reduce production costs.

[0003] The technical solution for composite current collector products is a "sandwich" structure, with a polymer layer as the inner layer and metal conductive layers on both sides of the polymer layer. Since the polymer layer of this composite current collector insulates the metal conductive layers on both sides, in order for the electron transfer area on one side to meet the battery requirements, the thickness of the metal conductive layer needs to reach more than 1μm. The composite copper foil in the current industrial mass production of composite current collectors uses 4.5μm thick PP (polypropylene) as the substrate. First, a 50nm copper layer is magnetron sputtered on both sides of the substrate, and then water electroplating is performed on the surface of the copper layer to thicken the copper layer to about 1μm. The copper layer prepared by this process route has poor purity, which will affect the conductivity index of the current collector. In addition, waste liquid will be generated, polluting the environment. To avoid this problem, the vacuum coating method can also be used to prepare the composite copper foil in one step, that is, it is completed by repeated magnetron sputtering or evaporation.

[0004] During vacuum coating, the current collector can easily go off track during the coating conveying and winding process due to other reasons such as the transmission system, resulting in uneven shoulders of the current collector roll after winding.

[0005] Therefore, it is necessary to provide a current collector coating winding device to solve the above problems. Utility Model Content

[0006] In order to overcome the above shortcomings, the purpose of the present invention is to provide a current collector coating winding device, which automatically corrects the deviation during the current collector coating transportation process to ensure the efficiency of the current collector winding.

[0007] In order to achieve the above purpose, the technical solution adopted by the utility model is: a current collector coating winding device, including a coating winding workbench, a feeding roller, a correction mechanism and a winding roller; a guide roller 1, multiple tensioning rollers and a guide roller 2 are arranged in sequence between the feeding roller and the winding roller, the correction mechanism includes a correction displacement assembly and a correction bracket connected thereto, the correction bracket is provided with a correction roller parallel to the feeding roller, and the correction displacement assembly can drive the correction bracket to move back and forth along the first direction.

[0008] Furthermore, the feed roller and take-up roller are each driven to rotate by a roller drive assembly. The roller drive assembly includes a roller drive bracket fixed to the back of the film coating and winding workbench. A roller drive motor is horizontally mounted on the roller drive bracket. The roller drive motor is connected to a connecting shaft on the feed roller or take-up roller via a belt drive mechanism to drive its rotation. The roller drive motor drives one of the drive wheels on the belt drive mechanism to rotate, thereby driving the connecting shaft connected to the feed roller or take-up roller to rotate. This allows the feed roller or take-up roller to automatically rotate to transport or take up the current collector coating film, eliminating the need for manual winding or loading, effectively improving the efficiency of the current collector coating winding process.

[0009] Furthermore, the deflection correction displacement assembly includes a protective housing and a horizontally positioned deflection correction drive motor located within the housing. A rotatable adjustment screw is disposed within the protective housing, parallel to the feed roller. The bottom of the deflection correction bracket is threadedly connected to the adjustment screw via an adjustment seat. When the deflection correction drive motor is driven, the deflection correction bracket can move back and forth along the adjustment screw. The protective housing protects the deflection correction drive motor and the adjustment screw within the housing, thereby extending the service life of the deflection correction drive motor.

[0010] The deflection correction drive motor drives the adjusting screw to rotate, thereby driving the deflection correction bracket located thereon to move toward or away from the vertical plate of the coating winding workbench, thereby correcting the coating of the current collector transported to the deflection correction roller.

[0011] Furthermore, the rotation shaft of the correction drive motor is provided with a correction master gear, and a bearing at one end of the adjustment screw is connected to a correction slave gear, and the correction master gear and the correction slave gear are meshed with each other. The correction master gear and the correction slave gear are meshed with each other. The meshing of the correction master gear and the correction slave gear enables the adjustment screw to rotate when the correction drive motor drives the correction master gear, thereby slightly reducing the space occupied by the protective box in its length direction, and further reducing the space occupied by the entire current collector coating winding device in its width direction, thereby improving the overall applicability.

[0012] Furthermore, a distance sensor is provided above the deflection correction mechanism on the coating winding workbench. The distance sensor senses the distance between the edge of the current collector coating film transported to the deflection correction roller, which is close to the distance sensor, and the vertical plate on the coating winding workbench, to determine whether the deflection correction displacement assembly needs to drive the deflection correction bracket to move for deflection correction.

[0013] Furthermore, the coating winding workbench comprises mutually perpendicular horizontal and vertical plates. The loading roller, winding roller, and deflection correction mechanism are all horizontally mounted on the vertical plates, with the deflection correction mechanism positioned above the multiple tensioning rollers and below the loading and winding rollers. The vertical plates on the coating winding workbench support the loading roller, winding roller, and deflection correction mechanism, while the horizontal plates are equipped with a controller for controlling the various drive components. Placing the deflection correction mechanism above the tensioning rollers reduces the horizontal space occupied by the entire coating winding apparatus, thereby effectively improving the applicability of the coating winding apparatus.

[0014] Furthermore, the vertical plate has two clearance slots along its height, corresponding to the positions of guide roller 1 and guide roller 2, respectively. Guide roller 1 and guide roller 2 are connected to the vertical plate via fixed mounts. The vertical plate has several sets of adjustment holes on both sides of the clearance slots, from top to bottom, to adjust the height of guide roller 1 and guide roller 2 on the vertical plate. Locking screws passing through threaded holes in the fixed mounts and the adjustment holes allow guide roller 1 and guide roller 2 to be removably fixed to the vertical plate. The height of guide roller 1 and guide roller 2 on the vertical plate can be adjusted based on the tension required for current collector coating.

[0015] Furthermore, it also includes a pressure roller assembly arranged above the correction bracket, the pressure roller assembly including a pressure roller bracket fixedly mounted on the film winding workbench, the pressure roller bracket being connected to a connecting plate via a fixed shaft, one end of the connecting plate being connected to a pressure plate via a bearing, the pressure plate having the same rotation direction as the feeding roller and abutting against the surface of the correction roller, a fixed block being provided on the back side of the connecting plate close to the pressure plate, a spring being connected between the fixed block and the fixed shaft. By providing a pressure plate abutting against the correction roller, when the current collector coating is transferred to the correction roller, it passes between the correction roller and the pressure plate. The spring provided on the connecting plate prevents the pressure plate from pressing the current collector coating against the correction roller, i.e., it does not affect the correction roller's transportation of the current collector coating.

[0016] At the same time, the pressure plate can also exert a certain pressure on the surface of the correction roller, so that the current collector coating is in a tensioned state during transportation, thereby reducing fluctuations and movements during operation, thereby reducing the chance of the current collector coating sliding or deviating.

[0017] Beneficial effects of the utility model:

[0018] In the present invention, the feeding roller, the winding roller, the guide roller 1, the tensioning roller and the correction mechanism cooperate with each other. The feeding roller feeds the collector coating, which passes through the guide roller 1 and the tensioning roller in turn. The collector coating after tensioning by the tensioning roller is transferred to the correction roller on the correction bracket. When it is sensed that the position where the collector coating and the next tensioning roller are connected is offset, the correction displacement component can adjust the position of the correction bracket according to the offset direction of the collector coating, so that the edges on both sides of the collector coating on the correction bracket correspond to the next tensioning roller, realizing automatic correction, ensuring the efficiency of subsequent winding of the collector, and avoiding the phenomenon of uneven shoulders after the collector is wound. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is an isometric view of the overall structure of an embodiment of the present utility model;

[0020] Figure 2 This is a front view of the overall structure of an embodiment of the utility model;

[0021] Figure 3 This is a schematic structural diagram of a correction mechanism according to an embodiment of the present invention;

[0022] Figure 4 This is an isometric view of the overall structure of a roller assembly according to an embodiment of the present invention;

[0023] In the figure: 1. Coating winding workbench; 2. Feeding roller; 3. Winding roller; 4. Roller drive assembly; 41. Roller drive bracket; 42. Roller drive motor; 43. Connecting shaft; 5. Guide roller 1; 6. Tensioning roller; 7. Correction mechanism; 71. Correction bracket; 72. Correction roller; 73. Correction displacement assembly; 731. Correction drive motor; 732. Adjustment screw; 732. Correction main gear; 733. Correction slave gear; 74. Connecting seat; 75. Protective box; 8. Distance sensor; 9. Guide roller 2; 10. Gap slot; 11. Fixed seat; 12. Adjustment hole. DETAILED DESCRIPTION

[0024] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more precise definition of the protection scope of the present invention.

[0025] See attached Figures 1 to 4As shown, a current collector coating winding device in this embodiment includes a coating winding workbench 1, a feeding roller 2, a correction mechanism 7, and a winding roller 3; a guide roller 1 5, a plurality of tensioning rollers 6, and a guide roller 2 9 are sequentially arranged between the feeding roller 2 and the winding roller 3. The feeding roller 2 conveys and feeds the current collector coating film, and the guide roller 1 5 can guide the loaded current collector to the tensioning roller 6 near the guide roller 1 5. After being tensioned by the tensioning roller 6, it is transferred to the correction mechanism 7;

[0026] The deflection correction mechanism 7 includes a deflection correction displacement assembly 73 and a deflection correction bracket 71 connected thereto. The deflection correction bracket 71 is provided with a deflection correction roller 72 parallel to the feeding roller 2. The deflection correction displacement assembly 73 can drive the deflection correction bracket 71 to move back and forth along the first direction. After being tensioned by the tensioning roller 6, the current collector coating is transferred to the deflection correction roller 72 on the deflection correction bracket 71. When it is sensed that the position where the current collector coating is docked with the next tensioning roller 6 is offset, the deflection correction displacement assembly 73 can adjust the position of the deflection correction bracket 71 according to the offset direction of the current collector coating, so that the edges of the current collector coating on the deflection correction bracket 71 correspond to the next tensioning roller 6, thereby achieving automatic deflection correction, ensuring the efficiency of subsequent current collector winding, and avoiding the phenomenon of uneven shoulders after the current collector is wound.

[0027] It should be noted that the first direction here refers to a direction parallel to the length direction of the feeding roller 2 .

[0028] The feeding roller 2 and the winding roller 3 are each driven to rotate by a roller drive assembly 4. The roller drive assembly 4 includes a roller drive bracket 41 fixed to the back of the film coating and winding workbench 1. A roller drive motor 42 is horizontally mounted on the roller drive bracket 41. The roller drive motor 42 is connected to a connecting shaft 43 on the feeding roller 2 or the winding roller 3 via a belt drive mechanism to drive the same. The roller drive motor 42 drives one of the drive wheels on the belt drive mechanism to rotate, thereby driving the connecting shaft 43 connected to the feeding roller 2 or the winding roller 3 to rotate. This allows the feeding roller 2 or the winding roller 3 to automatically rotate to transport or wind up the current collector coating film, eliminating the need for manual winding or loading, effectively improving the efficiency of the current collector coating winding process.

[0029] It should be noted that the belt transmission mechanism here is a combination structure of two transmission wheels and a transmission belt. One end of the connecting shaft 43 is fixedly connected to the loading roller 2 or the winding roller 3, and the other end is connected to one of the bearings of the two transmission wheels. The other unconnected transmission wheel is fixed on the roller drive motor 42.

[0030] The deflection correction displacement assembly 73 includes a protective box 75 and a horizontally disposed deflection correction drive motor 731 located therein. A rotatable adjustment screw 732 is disposed within the protective box 75, parallel to the feed roller 2. The bottom of the deflection correction bracket 71 is threadedly connected to the adjustment screw 732 via an adjustment seat. When the deflection correction drive motor 731 is driven, the deflection correction bracket 71 can move back and forth along the adjustment screw 732. The protective box 75 protects the deflection correction drive motor 731 and the adjustment screw 732 housed therein, thereby extending the service life of the deflection correction drive motor 731.

[0031] The correction drive motor 731 drives the adjusting screw 732 to rotate, thereby driving the correction bracket 71 located thereon to move toward or away from the vertical plate of the coating winding workbench 1, thereby correcting the coating of the current collector transported to the correction roller 72.

[0032] In some embodiments, the protection box 75 is fixedly connected to the vertical plate on the coating winding workbench 1 through the connecting seat 74. The protection box 75 is fixed on the coating winding workbench 1 through the connecting seat 74.

[0033] The rotation shaft of the correction drive motor 731 is provided with a correction main gear 732, and one end of the adjustment screw 732 is connected to a correction slave gear 733 with a bearing. The correction main gear 732 and the correction slave gear 733 are meshed with each other. The correction main gear 732 and the correction slave gear 733 are meshed with each other. The meshing of the correction main gear 732 and the correction slave gear 733 enables the adjustment screw 732 to rotate when the correction drive motor 731 drives the correction main gear 732, thereby slightly reducing the space occupied by the protective box 75 in its length direction, and thus reducing the space occupied by the entire collector coating winding device in its width direction, so as to improve the overall applicability.

[0034] The coating winding workbench 1 is provided with a distance sensor 8 located above the deflection correction mechanism 7. The distance sensor 8 can sense the distance between the edge of the current collector coating film transported to the deflection correction roller 72, which is close to the distance sensor 8, and the vertical plate on the coating winding workbench 1, so as to determine whether the deflection correction displacement assembly 73 needs to drive the deflection correction bracket 71 to move for deflection correction.

[0035] When the distance sensor 8 senses that the distance between the above-mentioned current collector coating and the vertical plate is greater than the set value, it means that the current collector coating as a whole is offset in the direction away from the distance sensor 8. At this time, the correction drive motor 731 on the correction displacement assembly 73 drives the adjustment screw 732 to rotate, so that the correction bracket 71 moves toward the direction close to the distance sensor 8, ensuring that the distance between the current collector coating and the vertical plate returns to the set value range; otherwise, the adjustment screw 732 is rotated in the opposite direction to adjust the position of the correction bracket 71.

[0036] The coating winding workbench 1 comprises mutually perpendicular horizontal and vertical plates. The loading roller 2, winding roller 3, and corrective mechanism 7 are all horizontally arranged on the vertical plates. The corrective mechanism 7 is positioned above the plurality of tensioning rollers 6 and below the loading roller 2 and winding roller 3. The vertical plates on the coating winding workbench 1 support the loading roller 2, winding roller 3, and corrective mechanism 7. The horizontal plates are provided with controllers for controlling the various drive components. The corrective mechanism 7, positioned above the tensioning roller 6, reduces the horizontal space occupied by the entire coating winding apparatus, thereby effectively improving the applicability of the coating winding apparatus.

[0037] The vertical plate has two clearance slots 10 defined along its height, corresponding to the positions of guide roller 1 (5) and guide roller 2 (9). Guide roller 1 (5) and guide roller 2 (9) are connected to the vertical plate via fixed mounts 11. Several sets of adjustment holes 12 are defined on both sides of the vertical plate, located in the height direction of the clearance slots 10, to adjust the height of guide roller 1 (5) and guide roller 2 (9) on the vertical plate. Locking screws passing through threaded holes in the fixed mounts 11 and the adjustment holes 12 allow guide roller 1 (5) and guide roller 2 (9) to be removably fixed to the vertical plate. The height of guide roller 1 (5) and guide roller 2 (9) on the vertical plate can be adjusted based on the tension required for current collector coating.

[0038] The screw connection makes it easier to disassemble the guide roller 1 5 and the guide roller 2 9, thereby increasing the adjustment speed.

[0039] It also includes a pressure roller assembly arranged above the deflection correction bracket 71, and the pressure roller assembly includes a pressure roller bracket fixedly mounted on the film winding workbench 1, the pressure roller bracket is connected to a connecting plate via a fixed shaft, and one end of the connecting plate is connected to a pressure plate via a bearing, the pressure plate has the same rotation direction as the feeding roller 2, and is in contact with the surface of the deflection correction roller 72, and a fixed block is provided on the back side of the connecting plate close to the pressure plate, and a spring is connected between the fixed block and the fixed shaft. By providing a pressure plate in contact with the deflection correction roller 72, when the current collector coating is transferred to the deflection correction roller 72, it passes between the deflection correction roller 72 and the pressure plate. A spring is provided on the connecting plate, so the pressure plate will not press the current collector coating onto the deflection correction roller 72, that is, it will not affect the transportation of the current collector coating by the deflection correction roller 72;

[0040] At the same time, the pressure plate can also apply a certain pressure to the surface of the correction roller 72, so that the current collector coating is in a tensioned state during transportation, thereby reducing fluctuations and movements during operation, thereby reducing the chance of the current collector coating sliding or deviating.

[0041] The above implementation methods are only for illustrating the technical concept and features of the utility model. Its purpose is to enable people familiar with this technology to understand the content of the utility model and implement it. It cannot be used to limit the scope of protection of the utility model. Any equivalent changes or modifications made according to the spirit of the utility model should be included in the scope of protection of the utility model.

Claims

1. A current collector coating winding device, characterized in that: It includes a coating winding workbench, a feeding roller, a correction mechanism and a winding roller; a guide roller 1, multiple tensioning rollers and a guide roller 2 are arranged in sequence between the feeding roller and the winding roller, and the correction mechanism includes a correction displacement component and a correction bracket connected thereto, and a correction roller parallel to the feeding roller is arranged on the correction bracket, and the correction displacement component can drive the correction bracket to move back and forth along the first direction.

2. A current collector coating winding device according to claim 1, characterized in that: The feeding roller and the winding roller are respectively driven to rotate by a roller drive assembly, and the roller drive assembly includes a roller drive bracket fixed on the back of the coating winding workbench, and a roller drive motor is horizontally arranged on the roller drive bracket. The roller drive motor is connected to the connecting shaft on the feeding roller or the winding roller through a belt transmission mechanism to drive it to rotate.

3. The current collector coating winding device according to claim 1, characterized in that: The correction displacement assembly includes a protective box and a correction drive motor located therein and arranged horizontally. A rotatable adjustment screw is arranged in the protective box parallel to the feeding roller. The bottom of the correction bracket is threadedly connected to the adjustment screw through an adjustment seat. When the correction drive motor is driven, the correction bracket can move back and forth along the adjustment screw.

4. A current collector coating winding device according to claim 3, characterized in that: The rotation shaft of the correction driving motor is connected to a correction main gear, and a bearing at one end of the adjusting screw is connected to a correction slave gear, and the correction main gear and the correction slave gear are meshed with each other.

5. The current collector coating winding device according to claim 1, characterized in that: The coating winding workbench is provided with a distance sensor located above the deviation correcting mechanism.

6. The current collector coating winding device according to claim 1, characterized in that: The coating winding workbench includes a horizontal plate and a vertical plate that are perpendicular to each other. The feeding roller, winding roller and correction mechanism are all horizontally arranged on the vertical plate, and the correction mechanism is located above multiple tensioning rollers and below the feeding roller and winding roller.

7. The current collector coating winding device according to claim 6, characterized in that: The vertical plate is provided with two clearance grooves corresponding to the positions of guide roller 1 and guide roller 2 along its height direction. The guide roller 1 and guide roller 2 are connected to the vertical plate through fixed seats respectively. The vertical plate is provided with several groups of adjustment holes from top to bottom on both sides of the clearance grooves in the height direction to adjust the height of guide roller 1 and guide roller 2 on the vertical plate.

8. The current collector coating winding device according to claim 1, characterized in that: It also includes a pressure roller assembly arranged above the correction bracket, the pressure roller assembly includes a pressure roller bracket fixed on the coating winding workbench, the pressure roller bracket is connected to a connecting plate through a fixed shaft, one end of the connecting plate is connected to a pressure plate through a bearing, the pressure plate has the same rotation direction as the feeding roller, and is in contact with the surface of the correction roller, a fixed block is provided on the back side of the connecting plate close to the pressure plate, and a spring is connected between the fixed block and the fixed shaft.

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