Double-roller indentation mechanism and lamination stacking machine
Through the design of the roller indentation mechanism, the synchronous rotation and heating treatment of the upper and lower rollers are used to solve the problem of poor cell alignment caused by the drop of the diaphragm belt, and the precise crease of the diaphragm and the high alignment stack of the cell are achieved.
Patent Information
- Application Number
- CN202422229419.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-11
- Publication Date
- 2025-08-29
- Estimated Expiration
- 2034-09-11
AI Technical Summary
When existing lamination machines are laminated, the diaphragm belt path is prone to fall, resulting in poor alignment of the battery cell, and creases are needed to improve alignment.
The roll indentation mechanism is adopted, and the diaphragm crease is generated by the synchronous rotation of the upper indentation main roller and the lower indentation main roller, and the diaphragm crease is generated by the matching of the projection and the indentation part, and the crease effect is improved by the heating assembly in the case of thermal deformation.
The alignment of the diaphragm belt path is improved, the alignment of the battery cell is ensured, the diaphragm is avoided, and the accuracy of the lamination is enhanced.
Smart Images
Figure CN223285031U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of lithium battery preparation, in particular to a roller indentation mechanism and a laminating machine. Background Art
[0002] The lithium battery manufacturing process includes a lamination step. Currently, lamination usually involves first cutting the strip-shaped electrode into sheets, then laminating the sheets with the diaphragm to form a composite strip, and then folding the composite strip through a lamination device to complete the lamination step.
[0003] In the existing stacking steps, a self-stacking type of electrode stacking machine is usually used for stacking. Although this type of stacking machine has alignment columns to limit the maximum width of the battery cell during stacking, it is inevitable that the diaphragm belt will sag slightly inward when the diaphragm belt falls freely during stacking, which will affect the left-right alignment of the battery cell. Therefore, it is necessary to add creases to each folding position of the diaphragm belt so that the stacking becomes guided when the diaphragm belt falls freely, thereby improving the alignment of the battery cell.
[0004] Therefore, there is an urgent need for a mechanism for producing creases in the diaphragm belt process. Utility Model Content
[0005] In order to overcome the deficiencies of the prior art, the utility model provides a roller creasing mechanism and a stacking machine, which can add creases to the diaphragm strip when the stacking machine is working, so as to improve the alignment during subsequent battery cell stacking.
[0006] The technical solution adopted by the utility model to solve its technical problems is:
[0007] A pair of roller indentation mechanisms, comprising a frame and a pair of roller assemblies mounted on the frame, the pair of roller assemblies comprising an upper indentation main roller and a lower indentation main roller, the lower indentation main roller being connected to a power unit driving the rotation thereof, a transmission mechanism being connected between the upper indentation main roller and the lower indentation main roller, the upper indentation main roller rotating synchronously with the lower indentation main roller via the transmission mechanism;
[0008] The upper indentation main roller has a raised portion on its surface along its length, and the lower indentation main roller has a recessed portion on its surface along its length; or the upper indentation main roller has a recessed portion on its surface along its length, and the lower indentation main roller has a raised portion on its surface along its length;
[0009] When the upper indentation main roller and the lower indentation main roller rotate synchronously, the protrusion can be embedded in the indentation.
[0010] As a further improvement of the above technical solution, the protrusion is a V-shaped protrusion, and the indentation is a V-shaped groove matching the V-shaped protrusion.
[0011] As a further improvement of the above technical solution, a plurality of V-shaped protrusions are evenly distributed on the upper indentation main roller, and a plurality of V-shaped grooves are evenly distributed on the lower indentation main roller, and the number of the V-shaped grooves is the same as the number of the V-shaped protrusions.
[0012] As a further improvement of the above technical solution, the power unit includes a servo motor, a reducer and a coupling. The servo motor is connected to the reducer. The output shaft of the reducer is coaxially connected to the upper indentation main roller through a coupling. The torque of the servo motor is transmitted to the lower indentation main roller through the reducer and the coupling.
[0013] As a further improvement of the above technical solution, the transmission mechanism includes a driving bevel gear and a driven bevel gear that are meshed with each other. The driving bevel gear is arranged at the end of the upper indentation main roller away from the servo motor, and the driven bevel gear is arranged at the end of the upper indentation main roller.
[0014] As a further improvement of the above technical solution, two heating components are provided on the frame, and the two heating components are used to heat the upper indentation main roller and the lower indentation main roller respectively.
[0015] As a further improvement of the above technical solution, the heating assembly includes a heating plate and a heating rod, the heating rod is arranged inside the heating plate, and the heating plates in the two heating assemblies are respectively located above the upper indentation main roller and below the lower indentation main roller.
[0016] As a further improvement of the above technical solution, one side of the two heating plates facing the upper indentation main roller and the lower indentation main roller is an arc-shaped surface.
[0017] As a further improvement of the above technical solution, a cylinder is provided on the frame, the movable end of the cylinder is connected to the heating plate located above the upper indentation main roller, and the cylinder is used to drive the heating plate away from or close to the upper indentation main roller.
[0018] The technical solution of the utility model also includes:
[0019] A laminating machine comprises the roller indentation mechanism in the above technical solution.
[0020] The beneficial effect of the present invention is that when the diaphragm belt passes between the upper and lower indentation main rollers, the upper and lower indentation main rollers rotate synchronously until the raised portion and the indented portion simultaneously rotate between the upper and lower indentation main rollers. At this time, the raised portion drives the diaphragm into the indented portion, thereby forming a fold on the diaphragm. In addition, the upper and lower indentation main rollers are heated by the heating component, so that the diaphragm is folded under thermal deformation, thereby improving the diaphragm folding effect and preventing the diaphragm from being damaged when the fold is formed. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] The present invention will be further described below with reference to the accompanying drawings and embodiments.
[0022] Figure 1 This is a front view of a roller indentation mechanism of the utility model;
[0023] Figure 2 This is a three-dimensional diagram of a roller creasing mechanism of the utility model;
[0024] Figure 3 This is a structural breakdown diagram of a frame in a roller creasing mechanism of the utility model;
[0025] Figure 4 This is a structural breakdown diagram of the upper indentation main roller in a pair of roller indentation mechanisms of the utility model;
[0026] Figure 5 yes Figure 4 A partial enlarged view of middle A;
[0027] Figure 6 This is a structural breakdown diagram of the lower indentation main roller in a pair of roller indentation mechanisms of the utility model;
[0028] Figure 7 yes Figure 6 A partial enlarged view of middle A;
[0029] Figure 8 The utility model is a schematic diagram of the rotation state of the upper indentation main roller and the lower indentation main roller in a pair of roller indentation mechanisms.
[0030] Figure markings: 1. frame; 11. right side plate; 12. bottom plate; 13. top plate; 14. left side plate; 15. gear guard; 2. upper indentation main roller; 21. V-shaped protrusion; 22. upper roller bearing seat; 23. first bearing; 3. lower indentation main roller; 31. V-shaped groove; 32. lower roller bearing seat; 33. second bearing; 4. power unit; 41. servo motor; 42. reducer; 43. motor mounting seat; 44. coupling; 5. first heating component; 51. first heating plate; 52. first heating rod; 53. first heating bracket; 54. solenoid valve; 55. cylinder; 56. cylinder connector; 57. pressure regulating valve; 58. relay; 6. second heating component; 61. second heating plate; 62. second heating rod; 63. second heating bracket; 7. driving helical gear; 8. driven helical gear. DETAILED DESCRIPTION
[0031] The following will clearly and completely describe the concept, specific structure and technical effects of the present invention in combination with the embodiments and drawings, so as to fully understand the purpose, characteristics and effects of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention. In addition, all the connection / connection relationships involved in the patent do not simply refer to the direct connection of components, but refer to the fact that a better connection structure can be formed by adding or reducing connection accessories according to the specific implementation situation. For example, the fixed connection / installation can be connected by screws, bolts and other accessories, or it can be directly connected by welding, bonding and other methods. The various technical features in the creation of the present invention can be combined interactively without conflicting with each other.
[0032] Reference Figure 1 and Figure 2 An embodiment of the utility model provides a pair of roller indentation mechanism, including a frame 1 and a pair of roller components installed on the frame 1, the pair of roller components including an upper indentation main roller 2 and a lower indentation main roller 3 arranged upper and lower, the lower indentation main roller 3 is connected to a power unit 4 for driving it to rotate, a transmission mechanism is connected between the upper indentation main roller 2 and the lower indentation main roller 3, the upper indentation main roller 2 rotates synchronously with the lower indentation main roller 3 through the transmission mechanism, thereby realizing the function of the pair of rollers.
[0033] In some embodiments, reference Figure 4-Figure 8 , a raised portion is provided on the roller surface of the upper indentation main roller 2 along its length direction, and a recessed portion is provided on the roller surface of the lower indentation main roller 3 along its length direction. When the upper indentation main roller 2 and the lower indentation main roller 3 rotate synchronously, the raised portion can be embedded in the recessed portion. Furthermore, the raised portion is a V-shaped protrusion 21, and the recessed portion is a V-shaped groove 31 that matches the V-shaped protrusion 21. When the diaphragm belt passes between the upper indentation main roller 2 and the lower indentation main roller 3, the V-shaped protrusion 21 will drive the diaphragm into the V-shaped groove 31, thereby generating creases on the diaphragm, thereby improving the alignment during subsequent battery cell stacking.
[0034] Furthermore, the upper indentation roller 2 is evenly distributed with a plurality of V-shaped protrusions 21, and the lower indentation roller 3 is evenly distributed with a plurality of V-shaped grooves 31, and the number of the V-shaped grooves 31 is the same as the number of the V-shaped protrusions 21. By setting the number of the V-shaped protrusions 21 and the V-shaped grooves 31, it is possible to match pole pieces of different widths. In other words, the spacing between adjacent folds on the separator matches the width of the pole piece, thereby improving the alignment of the positive and negative pole pieces and the separator when the battery cells are stacked.
[0035] In other embodiments, a concave portion is provided on the roller surface of the upper indentation main roller 2 along its length direction, and a convex portion is provided on the roller surface of the lower indentation main roller 3 along its length direction, that is, the V-shaped convexity 21 and the V-shaped groove 31 are respectively provided on the lower indentation main roller 3 and the upper indentation main roller 2, which can also achieve the effect of producing creases on the diaphragm.
[0036] In some embodiments, reference Figure 2 、 Figure 4 and Figure 6 Both ends of the upper indentation main roller 2 are rotatably connected to the frame 1 through the first bearing 23. Specifically, the first bearing 23 is fixedly sleeved on both ends of the upper indentation main roller 2, and the left side plate 14 and the right side plate 11 of the frame 1 are respectively installed with an upper roller bearing seat 22, and the first bearing 23 is installed in the upper roller bearing seat 22.
[0037] Similarly, both ends of the lower indentation main roller 3 are rotatably connected to the frame 1 through second bearings 33. Specifically, the second bearings 33 are fixedly sleeved on both ends of the lower indentation main roller 3, and the left side plate 14 and the right side plate 11 of the frame 1 are respectively installed with two lower roller bearing seats 32, and the second bearings 33 are installed in the lower roller bearing seats 32.
[0038] In some embodiments, reference Figure 6 The power unit 4 includes a servo motor 41, a reducer 42 and a coupling 44. The servo motor 41 and the reducer 42 are integrally connected and installed. The reducer 42 is fixed to the right side plate 11 of the frame 1 through a motor mounting seat 43. The output shaft of the reducer 42 is coaxially connected to the upper indentation main roller 2 through a coupling 44. The torque of the servo motor 41 is transmitted to the lower indentation main roller 3 through the reducer 42 and the coupling 44, thereby driving the lower indentation main roller 3 to rotate when the servo motor 41 is running.
[0039] Further, refer to Figure 2 、 Figure 4 and Figure 6 The transmission mechanism includes a mutually meshing driving bevel gear 7 and a driven bevel gear 8. The driving bevel gear 7 is disposed at the end of the upper indentation main roller 2 away from the servo motor 41, and the driven bevel gear 8 is disposed at the end of the upper indentation main roller 2. Due to the meshing of the driving bevel gear 7 and the driven bevel gear 8, when the servo motor 41 drives the lower indentation main roller 3 to rotate, the driving bevel gear 7 rotates synchronously, thereby driving the driven bevel gear 8 to rotate, and thus driving the upper indentation main roller 2 to rotate synchronously. Through the synchronous rotation of the upper indentation main roller 2 and the lower indentation main roller 3, it is ensured that the V-shaped protrusion 21 can be precisely embedded in the matching V-shaped groove 31, ensuring the continuous and stable operation of generating folds on the diaphragm.
[0040] Preferably, a gear shield 15 is provided on the left side plate 14 of the frame 1, and the gear shield 15 is used to cover the driving helical gear 7 and the driven helical gear 8 to prevent debris from entering between the driving helical gear 7 and the driven helical gear 8 and affecting the transmission of the two.
[0041] In some embodiments, reference Figure 1-Figure 3 The frame 1 is equipped with two heating assemblies, designated as a first heating assembly 5 and a second heating assembly 6. The first heating assembly 5 is used to heat the upper indentation roller 2, while the second heating assembly 6 is used to heat the lower indentation roller 3. Both the upper and lower indentation rollers 2 and 3 are made of S45C steel, which has a high thermal conductivity. During the diaphragm crease formation process, the upper and lower indentation rollers 2 and 3 are heated, causing the diaphragm to crease under thermal deformation. This improves the quality of the diaphragm crease formation and prevents damage such as cracks during the crease formation process.
[0042] Specifically, the first heating assembly 5 includes a first heating plate 51, a first heating rod 52 and a first heating bracket 53. The first heating plate 51 is installed on the first heating bracket 53. A heating hole is provided in the first heating plate 51. The first heating rod 52 is located in the heating hole of the first heating plate 51, and the side of the first heating plate 51 facing the upper indentation main roller 2 is an arc surface, thereby improving the heating effect of the first heating plate 51 on the upper indentation main roller 2. Since the upper indentation main roller 2 is provided with a V-shaped protrusion 21, in order to further improve the heating effect of the upper indentation main roller 2, a cylinder 55 is installed on the top plate 13 of the frame 1, and the piston rod of the cylinder 55 is connected to the first heating bracket 53 through the cylinder connector 56, so that the first heating plate 51 can be driven to rise and fall by the cylinder 55, thereby adjusting the distance between the first heating plate 51 and the upper indentation main roller 2. When the V-shaped protrusion 21 is about to rotate to between the first heating plate 51 and the upper indentation main roller 2, the first heating plate 51 is driven away from the upper indentation main roller 2 by the cylinder 55. When the V-shaped protrusion 21 leaves between the first heating plate 51 and the upper indentation main roller 2, the first heating plate 51 is driven close to the upper indentation main roller 2 by the cylinder 55.
[0043] The second heating assembly 6 includes a second heating plate 61, a second heating rod 62 and a second heating bracket 63. The second heating plate 61 is installed on the second heating bracket 63, and the second heating bracket 63 is fixed on the bottom plate 12 of the frame 1. A heating hole is also provided in the second heating plate 61. The second heating rod 62 is located in the heating hole of the second heating plate 61, and the two sides of the second heating plate 61 facing the upper indentation main roller 2 are arc surfaces, thereby improving the heating effect of the second heating plate 61 on the upper indentation main roller 2.
[0044] In the above embodiment, the cylinder 55 is connected to a solenoid valve 54 and a pressure regulating valve 57. The solenoid valve 54 drives the cylinder 55, and the pressure regulating valve 57 adjusts the air pressure in the cylinder 55. In addition, the heating of the first heating rod 52 and the second heating rod 62 are controlled by a relay 58. The heat is then transferred to the upper indentation main roller 2 and the lower indentation main roller 3 through the first heating plate 51 and the second heating plate 61.
[0045] An embodiment of the present invention further provides a laminating machine, which includes the roller indentation mechanism in the above embodiment. The roller indentation mechanism is added to the laminating machine to produce evenly spaced folds on the diaphragm, thereby improving the alignment of the pole pieces during lamination.
[0046] The above is a specific description of the preferred implementation of the present invention, but the invention of the present invention is not limited to the embodiments. Those skilled in the art can make various equivalent modifications or substitutions without violating the spirit of the present invention. These equivalent modifications or substitutions are all included in the scope defined by the claims of this application.
Claims
1. A roller creasing mechanism, characterized in that: The invention comprises a frame and a pair of rollers mounted on the frame, wherein the pair of rollers comprises an upper indentation main roller and a lower indentation main roller, wherein the lower indentation main roller is connected to a power unit driving the rotation thereof, and a transmission mechanism is connected between the upper indentation main roller and the lower indentation main roller, wherein the upper indentation main roller rotates synchronously with the lower indentation main roller through the transmission mechanism; The upper indentation main roller has a raised portion on its surface along its length, and the lower indentation main roller has a recessed portion on its surface along its length; or the upper indentation main roller has a recessed portion on its surface along its length, and the lower indentation main roller has a raised portion on its surface along its length; When the upper indentation main roller and the lower indentation main roller rotate synchronously, the protrusion can be embedded in the indentation.
2. The roller creasing mechanism according to claim 1, characterized in that: The protrusion is a V-shaped protrusion, and the indentation is a V-shaped groove matching the V-shaped protrusion.
3. The roller creasing mechanism according to claim 2, characterized in that: The upper indentation main roller is evenly provided with a plurality of the V-shaped protrusions, and the lower indentation main roller is evenly provided with a plurality of the V-shaped grooves, and the number of the V-shaped grooves is the same as the number of the V-shaped protrusions.
4. The roller creasing mechanism according to claim 1, characterized in that: The power unit includes a servo motor, a reducer and a coupling. The servo motor is connected to the reducer. The output shaft of the reducer is coaxially connected to the upper indentation main roller through the coupling. The torque of the servo motor is transmitted to the lower indentation main roller through the reducer and the coupling.
5. The roller creasing mechanism according to claim 4, characterized in that: The transmission mechanism includes a driving helical gear and a driven helical gear meshing with each other. The driving helical gear is arranged at one end of the upper indentation main roller away from the servo motor, and the driven helical gear is arranged at the end of the upper indentation main roller.
6. The roller creasing mechanism according to any one of claims 1 to 5, characterized in that: Two heating components are provided on the frame, and the two heating components are used to heat the upper indentation main roller and the lower indentation main roller respectively.
7. The roller creasing mechanism according to claim 6, characterized in that: The heating assembly includes a heating plate and a heating rod, wherein the heating rod is arranged inside the heating plate, and the heating plates in the two heating assemblies are respectively located above the upper indentation main roller and below the lower indentation main roller.
8. The roller creasing mechanism according to claim 7, characterized in that: The two heating plates have arc-shaped surfaces facing the upper indentation main roller and the lower indentation main roller.
9. The roller creasing mechanism according to claim 7, characterized in that: A cylinder is provided on the frame, and a movable end of the cylinder is connected to a heating plate located above the upper indentation main roller. The cylinder is used to drive the heating plate away from or close to the upper indentation main roller.
10. A laminating machine, characterized in that: The invention comprises the roller indentation mechanism according to any one of claims 1 to 9.