Lamination device

Abstract

The utility model relates to the technical field of battery lamination, and provides a lamination device which comprises a lamination table assembly, the lamination table assembly comprises a base table and at least one extension block, the extension block is detachably arranged on the side edge of the base table, a diaphragm assembly is used for laying a diaphragm on the lamination table assembly, and the diaphragm assembly can reciprocate relative to the lamination table assembly to expose or cover the lamination table assembly. The extension blocks are connected to the side edges of the base station, so that the area of the base station is increased in the transverse direction and / or the longitudinal direction, through combination of different forms, the size of the lamination table can meet the lamination requirements of pole pieces of different sizes, the difficulty of equipment remodeling due to size change is avoided, and the research and development time and the research and development cost are saved. The first driving assembly drives the diaphragm assembly to move along the first preset path, the diaphragm is automatically laid on the stacking table assembly in the moving process, manpower is reduced, and the stacking efficiency and quality are improved.

Description

Technical Field

[0001] This utility model relates to the field of battery stacking technology, and in particular to a stacking device. Background Technology

[0002] In the research and development of lithium batteries, the stacking process is one of the key steps in cell manufacturing. Compared to the winding process, stacked cells have higher energy density, more stable structure, and longer cycle life. However, existing automated stacking machines are mainly designed for mass production and face many challenges during the research and development phase:

[0003] 1. Insufficient compatibility: During the R&D stage, it is often necessary to adjust the electrode size or switch the same-side / opposite-side electrode tab design, but the compatibility range of standard stacking machines is limited and it is difficult to adapt to large size changes.

[0004] 2. High changeover cost: Equipment changeover requires adjustment of tooling fixtures, which is time-consuming, costly, and may even fail to adapt to new specifications.

[0005] 3. Difficult debugging: Frequent model changes can easily lead to a shift in the reference point, affecting the stability and consistency of batch trial production.

[0006] While some current wafer stacking equipment offers a degree of flexibility, it remains production-oriented and struggles to meet the demands of small-batch, multi-specification R&D. Therefore, there is an urgent need to develop a wafer stacking device suitable for pilot production lines. Utility Model Content

[0007] The purpose of this invention is to provide a stacking device to solve the problems in the prior art, which can support rapid model changeover, wide-range electrode compatibility and efficient debugging, thereby accelerating the cell development process.

[0008] This utility model provides a stacking device, comprising:

[0009] A stacking assembly includes a base and at least one extension block, the extension block being detachably disposed on the side of the base;

[0010] A diaphragm assembly is disposed above the stacking assembly and is used to lay a diaphragm onto the stacking assembly. The diaphragm assembly can reciprocate relative to the stacking assembly to expose or cover the stacking assembly.

[0011] The first drive component is used to drive the diaphragm component to reciprocate.

[0012] In the stacking apparatus described above, preferably, the stacking apparatus further includes a worktable, on which the stacking assembly, the diaphragm assembly, and the first drive assembly are all mounted.

[0013] In the stacking device described above, preferably, the stacking device further includes a holding component and a second driving component. The holding component is symmetrically disposed at the four corners of the stacking assembly. The holding component can move relative to the stacking assembly to move closer to or further away from the stacking assembly. The second driving component is used to drive the holding component to move.

[0014] In the stacking device described above, preferably, the pressing assembly includes a pressure plate and a first driving unit, the pressure plate is connected to the output shaft of the first driving unit, and the first driving unit drives the pressure plate to move up and down relative to the stacking assembly.

[0015] In the stacking device described above, preferably, the second driving component includes a first lead screw and a first motor, the pressing component is threadedly connected to the first lead screw, and the first motor is drivenly connected to the first lead screw to drive the pressing component to reciprocate on the first lead screw.

[0016] In the stacking device described above, preferably, the stacking device further includes a third driving component for driving the stacking assembly to move relative to the diaphragm assembly.

[0017] In the stacking device described above, preferably, the third drive assembly includes a second lead screw and a second motor. The second lead screw is connected to both sides of the stacking assembly, and the second motor is driven by the second lead screw to drive the stacking assembly to reciprocate along the second lead screw.

[0018] In the stacking device described above, preferably, the stacking assembly further includes a pad, the base is disposed on the pad, the two sides of the pad extend to the outer side of the base, and the second lead screw passes through the pad.

[0019] In the stacking device described above, preferably, the diaphragm assembly includes a support frame, an unwinding shaft, a diaphragm roll, a tension roller, a guide roller, and a smoothing roller. The support frame is disposed on both sides of the stacking assembly, the diaphragm roll is threaded onto the unwinding shaft, and the unwinding shaft, tension roller, guide roller, and smoothing roller are sequentially installed between the two support frames from top to bottom.

[0020] In the stacking device described above, preferably, the first driving component includes a third lead screw and a third motor. The third lead screw is threadedly connected to the bottom of the support frame, and the third motor is drivenly connected to the third lead screw to drive the support frame to reciprocate on the third lead screw.

[0021] Compared with existing technologies, this invention increases the area of ​​the base in the horizontal and / or vertical directions by connecting extension blocks to the side of the base. Through different combinations, the stacking platform size can meet the stacking requirements of electrode sheets of different sizes, avoiding the difficulty of equipment replacement due to size changes, and saving R&D time and costs. The diaphragm assembly is driven by the first drive component to move along the first preset path, and the diaphragm is automatically laid onto the stacking platform assembly during the movement, reducing manpower and improving stacking efficiency and quality. Attached Figure Description

[0022] Figure 1 This is a perspective view of Embodiment 1 provided by the present utility model;

[0023] Figure 2 This is a schematic diagram of the base connecting the horizontal extension block provided in an embodiment of this utility model;

[0024] Figure 3 This is a schematic diagram of the base connecting the longitudinal extension block provided in an embodiment of this utility model;

[0025] Figure 4 This is a cross-sectional view of the pressing component and the second driving component of this utility model;

[0026] Figure 5 This is a perspective view of Embodiment 2 provided by this utility model;

[0027] Figure 6 This is a perspective view of the third drive component of this utility model.

[0028] Explanation of reference numerals in the attached figures:

[0029] 10 - Stacking assembly, 11 - Base, 12 - Longitudinal extension block, 13 - Lateral extension block, 14 - Pad block;

[0030] 20 - Diaphragm assembly, 21 - Support frame, 22 - Unwinding shaft, 23 - Diaphragm roll, 24 - Tension roller, 25 - Guide roller, 26 - Smoothing roller;

[0031] 30 – First drive assembly; 31 – Third lead screw; 32 – Third motor;

[0032] 40 - Holding assembly, 41 - Pressure plate, 42 - First drive unit;

[0033] 50 – Second drive assembly; 51 – First lead screw; 52 – First motor; 53 – Support block;

[0034] 60 – Third drive assembly; 61 – Second lead screw; 62 – Second motor;

[0035] 70 - Workbench, 71 - Control buttons. Detailed Implementation

[0036] The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0037] During the research and development stage of batteries, there is a need to stack electrodes of different sizes. Existing stacking machines have a limited compatibility range and cannot meet the stacking requirements of cells with large variations in electrode size. Furthermore, they suffer from long changeover times and high costs. Therefore, this application provides a stacking device that is compatible with stacking cells of different sizes. It includes a stacking platform assembly 10, a separator assembly 20, and a first driving assembly 30, wherein:

[0038] Example 1

[0039] See Figure 1 As shown in Figure 3, the stacking assembly 10 includes a base 11 and at least one extension block, which is detachably disposed on the side of the base 11. The base 11 has extensions around its perimeter, with a preset distance between the extensions. The extension blocks can be connected to the extensions from the length direction and / or width direction of the base 11. By freely combining these extensions, the area of ​​the base 11 can be increased. This application allows the stacking assembly 10 to meet the stacking requirements of different sizes of electrode sheets by combining the base 11 in different forms, avoiding the difficulty of equipment replacement due to size changes, and saving R&D time and costs. The extension blocks can be longitudinal extension blocks 12 adapted to the base 11, or transverse extension blocks 13 adapted to the extensions. When the base 11 is extended by the transverse extension blocks 13, extension blocks should be connected to each extension on the same side of the base 11 to avoid gaps during stacking and affecting the stacking effect.

[0040] The diaphragm assembly 20 is disposed above the stack assembly 10 and is used to lay the diaphragm onto the stack assembly 10. The diaphragm assembly 20 can move relative to the stack assembly 10 to expose or cover the stack assembly 10. In this embodiment, the relative movement of the separator assembly 20 and the stacking assembly 10 is such that the separator assembly 20 moves along the width direction of the stacking assembly 10. When the projection of the separator assembly 20 does not coincide with the projection of the stacking assembly 10, the stacking assembly 10 is exposed. At this time, positive and negative electrode sheets can be placed on the stacking assembly 10. When the projection of the separator assembly 20 covers the projection of the stacking assembly 10, the separator on the separator assembly 20 is stacked on the electrode sheet of the stacking assembly 10. By reciprocating the separator assembly 20 relative to the stacking assembly 10, the electrode sheet and separator are stacked in sequence to finally form the required battery cell. In the embodiment provided in this application, the orthogonal projection range of the separator assembly 20 is larger than the orthogonal projection range of the stacking assembly 10. When the stacking assembly 10 is combined into any shape, separators of different sizes can be correspondingly set on the separator assembly 20 to achieve compatibility with battery cell stacks of different sizes.

[0041] The first drive assembly 30 is used to drive the diaphragm assembly 20 to reciprocate. This application uses a freely combinable stacking assembly 10 to meet the needs of cells of different sizes. The first drive assembly 30 drives the diaphragm assembly 20 to reciprocate relative to the stacking assembly 10 to stack the diaphragms. It is convenient to use, low in cost, and suitable for use in pilot production lines.

[0042] The worktable 70 serves as the supporting component of the entire stacking device, and the stacking assembly 10, the diaphragm assembly 20, and the first drive assembly 30 are all mounted on the worktable 70.

[0043] To ensure accuracy during electrode installation, please refer to [link / reference]. Figure 4 As shown, the stacking device also includes a pressing component 40 and a second driving component 50. The pressing components 40 are symmetrically arranged at the four corners of the stacking assembly 10. The pressing components 40 can move relative to the stacking assembly 10 to move closer to or further away from the stacking assembly 10. The second driving component 50 is used to drive the pressing components 40 to move. In this embodiment, the pressing components 40 are used to press the diaphragm or electrode on the base 11 to fix it in a certain shape. The pressing components 40 are arranged at the four corners of the stacking assembly 10 so that the size of the cell can be adapted to the size of the stacking assembly 10. When the pressing components 40 move to the preset position of the stacking assembly 10, they press the diaphragm or electrode on the stacking assembly 10. In this embodiment, the two pressing components 40 along the width direction of the base 11 move synchronously, and the two pressing components 40 opposite each other along the length direction of the base 11 press alternately. This pressing method can make the four corners of the electrode flat and avoid curling.

[0044] See Figure 4 As shown, the pressing assembly 40 includes a pressing plate 41 and a first driving part 42. The pressing plate 41 is connected to the output shaft of the first driving part 42, and the first driving part 42 drives the pressing plate 41 to move up and down relative to the stacking assembly 10. The pressing plate 41 is used to control the position of the electrode and the separator during stacking. When the pressing plate 41 reaches the preset position, the first driving part 42 drives the pressing plate 41 to press down to press the separator or electrode. When the two pressing plates 41 on one side of the base 11 press the upper layer, the two pressing plates 41 on the other side move out from the lower layer, thereby pressing the electrode or separator in a cross manner in sequence, so that it is precisely pressed onto the base 11 in sequence, improving the pressing speed. In addition, the movable ends of the two pressing plates 41 along the length of the base 11 are arranged opposite each other, so that when one pressing plate 41 is pressed, the other pressing plate 41 can be moved out from the pressing point of the previous electrode or separator without affecting each other. In this embodiment, the first driving part can be a cylinder or a hydraulic telescopic rod, preferably a cylinder.

[0045] In this embodiment, see Figure 4As shown, the second drive assembly 50 includes a first lead screw 51 and a first motor 52. The pressing assembly 40 is connected to the first lead screw 51, and the first motor 52 is driven by the first lead screw 51 to drive the pressing assembly 40 to reciprocate on the first lead screw 51. The bottom of the first drive part 42 is threaded to the first lead screw 51 or threaded to the first lead screw 51 through other connecting parts. The four first drive parts 42 are driven by the four first motors 52 to perform reciprocating motion, so that each pressure plate 41 or the pressure plate 41 on the same side can move independently, reducing interference. In this embodiment, the two first lead screws 51 along the length direction of the base 11 are on the same extension line, and a support block 53 is provided between the two first lead screws 51. The two first lead screws 51 are independently connected to the support block 53, that is, the two first motors 52 on one side share the same support block 53. In another embodiment, the second drive component 50 may also be the first motor 52 and the linear guide rail. The holding component 40 is mounted on the linear guide rail and is driven by the first motor 52 to reciprocate on the linear guide rail. In addition, the second drive component 50 may also be other drive devices that satisfy linear motion, which are not limited here.

[0046] In this embodiment, see Figure 1 and Figure 5 As shown, the diaphragm assembly 20 includes a support frame 21, an unwinding shaft 22, a diaphragm roll 23, a tension roller 24, a guide roller 25, and a smoothing roller 26. The support frames 21 are arranged on both sides of the stacking assembly 10. The diaphragm roll 23 is threaded onto the unwinding shaft 22. The unwinding shaft 22, tension roller 24, guide roller 25, and smoothing roller 26 are sequentially installed between the two support frames 21 from top to bottom. The unwinding shaft 22 supports the diaphragm roll 23, allowing it to rotate smoothly and release the diaphragm. The diaphragm is wound in a roll onto the diaphragm roll 23. One side of the unwinding shaft 22 is connected to one of the support frames 21. By lifting this side, the diaphragm roll 23 can be installed on the unwinding shaft 22. The unwinding shaft 22 is also equipped with positioning marks for quick installation and positioning.

[0047] The tension roller 24 is a rectangular frame with a fixed shaft on the short side and a rotatable roller on the long side. The roller is installed between the fixed shafts, and the fixed shaft of the tension roller 24 is connected to the support frame 21. Through its structure and movement, the tension roller 24 applies appropriate tension to the diaphragm, maintaining a stable tension state during transport and preventing the diaphragm from becoming loose or overly tight. This ensures the positional accuracy and stability of the diaphragm during subsequent processing. The guide roller 25 guides and changes the direction of diaphragm transport. Simultaneously, the guide roller 25 also provides some support to the diaphragm, preventing sagging or swaying during transport. The smoothing roller 26 smooths the diaphragm by applying uniform pressure to its surface.

[0048] Furthermore, two smoothing rollers 26 are arranged parallel to each other along the length of the base 11, and the distance between the two smoothing rollers 26 is less than 1 mm. The two parallel smoothing rollers 26 can perform two compression and smoothing operations on the diaphragm. When the diaphragm passes through the two very closely spaced smoothing rollers 26, wrinkles, bumps, or unevenness on the diaphragm surface can be eliminated more effectively, resulting in higher flatness of the diaphragm and smoother operation during diaphragm oscillation.

[0049] See Figure 1 As shown, the first drive assembly 30 includes a third lead screw 31 and a third motor 32. The third lead screw 31 is disposed at the bottom of the support frame 21, and the third motor 32 is driven by the third lead screw 31 to drive the support frame 21 to reciprocate on the third lead screw 31. In this embodiment, the third lead screw 31 is disposed along the width direction of the base 11, and the bottom of the support frame 21 is threadedly connected to the third lead screw 31, or threadedly connected to the third lead screw 31 through other connecting parts. The rotation of the third motor 32 drives the third lead screw 31 to rotate, and the support frame 21 moves linearly along the third lead screw 31, thereby causing the diaphragm assembly 20 to move back and forth relative to the stacking assembly 10. The first drive assembly 30 and the second drive assembly 40 can be other linear motion devices, which are not limited here.

[0050] Example 2

[0051] See Figure 5 As shown in Figure 6, the difference between this embodiment and Embodiment 1 is that the stacking device further includes a third driving component 60, which is used to drive the stacking assembly 10 to move relative to the diaphragm assembly 20. In Embodiment 1, the stacking assembly 10 is stationary, and stacking is performed by driving the diaphragm assembly 20 to move. In Embodiment 2, the diaphragm assembly 20 is stationary, and stacking is performed by driving the stacking assembly 10 to move.

[0052] In this embodiment, see Figure 6 As shown, the third drive assembly 60 includes a second lead screw 61 and a second motor 62. The second lead screw 61 is respectively disposed on both sides of the stacking assembly 10, and the second motor 62 is drivenly connected to the second lead screw 61 to drive the stacking assembly 10 to reciprocate on the second lead screw 61. In this embodiment, the second motor 62 drives the stacking assembly 10 to move synchronously on the second lead screw 61 on both sides, and the third drive assembly 60 is disposed on the worktable 70. The third drive assembly 60 and the second drive assembly 40 can be other linear motion devices, which are not limited here.

[0053] To facilitate the movement of the third drive assembly 60 driving the stack assembly 10, see [link / reference] Figure 1 , 4As shown in Figure 6, the stacking assembly 10 also includes a pad 14. The base 11 is mounted on the pad 14, and both sides of the pad 14 extend to the outer sides of the base 11. The second lead screw 61 passes through the pad 14. The movement of the pad 14 on the second lead screw 61 drives the stacking assembly 10 to move. Since the third drive assembly 60 does not directly contact the stacking assembly 10, the stacking assembly 10 can still freely combine the base 11 and the extension blocks. The pad 14 needs to have a certain height to facilitate the installation of the second drive assembly 50 and the third drive assembly 60.

[0054] See Figure 1 and Figure 5 As shown, the worktable 70 is also equipped with multiple control buttons 71, which are used to control the first drive component 30, the holding component 40, the second drive component 50 and the third drive component 60 respectively. The control principle can adopt existing technology and is not limited here.

[0055] Based on the above embodiments, the working process of this application is as follows:

[0056] Before stacking, the extension block is spliced ​​and combined with the base 11 to form the required stacking size. The fourth motor is driven to move the support frame 21 to one end along the width direction of the worktable 70, exposing the stacking assembly 10. The diaphragm is stretched manually and stretched onto the base 11. The first motor 52 on the left side is driven to rotate, so that the two first drive parts 42 on the left side move from the left side of the base 11 to the middle along the first lead screw 51 on the left side. When the end of the pressure plate 41 on the left side enters the edge of the diaphragm mm, the movement stops. The first drive part 42 on the left side is driven to lower the pressure plate 41 on the left side to press the diaphragm on the base 11.

[0057] After the operator picks up the negative electrode sheet using a portable electromagnetic chuck and places it on the laid diaphragm, the operator drives a set of first motors 52 on the right to rotate, so that the first drive unit 42 on the right moves along the first lead screw 51 on the right from the right side of the base 11 to the middle. When the end of the pressure plate 41 on the right enters the edge of the diaphragm mm, the movement stops, and the two first drive units 424 on the right drive the pressure plate 41 to press down on the negative electrode sheet.

[0058] The two first motors 52 on the left side are driven to move the first drive unit 42 on the left side along the first lead screw 51 on the left side from the middle of the base 11 to the left. When the end of the pressure plate 41 on the left side exceeds the edge of the diaphragm by mm, the movement stops. The first drive unit 42 on the left side is driven to raise the pressure plate 41 on the left side.

[0059] The third motor 32 is driven to move the support frame 21 to the other end along the width of the worktable 70, exposing the stacking assembly 10. During the movement, the diaphragm covers the negative electrode sheet. The operator uses a portable electromagnetic chuck to pick up the positive electrode sheet and places it on the diaphragm.

[0060] Drive the first motor 52 on the left side to make the first drive part 42 on the left side move from the left side of the base 11 to the middle along the first lead screw 51 on the left side. When the end of the pressure plate 41 on the left side enters the edge of the diaphragm mm, stop moving. Drive the first drive part 42 on the left side to make the pressure plate 41 on the left side drop and press the positive electrode sheet.

[0061] Drive the first motor 52 on the right side to move the first drive unit 42 on the right side along the first lead screw 51 on the right side from the middle of the base 11 to the side. When the end of the pressure plate 41 on the right side exceeds the edge of the diaphragm by mm, stop moving. Drive the first drive unit 42 on the right side to raise the pressure plate 41 on the right side. Repeat the above operation steps until the required number of stacked layers is completed. The top electrode of the stacked core is the negative electrode. After completing the last negative electrode stack and diaphragm coverage, manually cut the diaphragm, apply adhesive to complete the material cutting, and thus complete the production of one stacked core.

[0062] Another working process of this application differs from the above working process in that the diaphragm assembly 20 is stationary, and the stacking assembly 10 is controlled to reciprocate along the second lead screw 61 by driving the second motor 62 to complete the laying of the diaphragm.

[0063] It should be noted that the left and right sides in the above work process are only for the purpose of illustrating the work process. Figure 1 or Figure 5 The direction shown in the figure is used as an example for illustration. This application does not limit whether the second drive component 50 on the left side or the second drive component 50 on the right side is operated first.

[0064] The above description, based on the embodiments shown in the drawings, details the structure, features, and effects of this utility model. The above description is only a preferred embodiment of this utility model, but the scope of implementation of this utility model is not limited to what is shown in the drawings. Any changes made in accordance with the concept of this utility model, or modifications to equivalent embodiments, that do not exceed the spirit covered by the specification and drawings, shall be within the protection scope of this utility model.

Claims

1. A stacking device, characterized in that, include: A stacking assembly includes a base and at least one extension block, the extension block being detachably disposed on the side of the base; A diaphragm assembly is disposed above the stacking assembly and is used to lay a diaphragm onto the stacking assembly. The diaphragm assembly can reciprocate relative to the stacking assembly to expose or cover the stacking assembly. The first drive component is used to drive the diaphragm component to reciprocate.

2. The stacking device according to claim 1, characterized in that: The stacking device also includes a worktable, on which the stacking assembly, the diaphragm assembly, and the first drive assembly are all mounted.

3. The stacking device according to claim 1, characterized in that, The stacking device further includes a holding component and a second driving component. The holding component is symmetrically arranged at the four corners of the stacking assembly. The holding component can move relative to the stacking assembly to move closer to or further away from the stacking assembly. The second driving component is used to drive the holding component to move.

4. The stacking device according to claim 3, characterized in that, The pressing assembly includes a pressure plate and a first driving part. The pressure plate is connected to the output shaft of the first driving part, and the first driving part drives the pressure plate to move up and down relative to the stacking assembly.

5. The stacking apparatus according to claim 3, characterized in that, The second drive assembly includes a first lead screw and a first motor. The holding assembly is threadedly connected to the first lead screw, and the first motor is drivenly connected to the first lead screw to drive the holding assembly to reciprocate on the first lead screw.

6. The stacking apparatus according to claim 1, characterized in that, The stacking device further includes a third driving component for driving the stacking assembly to move relative to the diaphragm assembly.

7. The stacking apparatus according to claim 6, characterized in that, The third drive assembly includes a second lead screw and a second motor. The second lead screw is connected to both sides of the stacking assembly, and the second motor is driven by the second lead screw to drive the stacking assembly to reciprocate along the second lead screw.

8. The stacking apparatus according to claim 7, characterized in that, The stacking assembly also includes a pad block, the base is disposed on the pad block, the two sides of the pad block extend to the outer side of the base, and the second lead screw passes through the pad block.

9. The stacking apparatus according to claim 1, characterized in that, The diaphragm assembly includes a support frame, an unwinding shaft, a diaphragm roll, a tension roller, a guide roller, and a smoothing roller. The support frame is disposed on both sides of the stacking assembly. The diaphragm roll is threaded onto the unwinding shaft. The unwinding shaft, tension roller, guide roller, and smoothing roller are sequentially installed between the two support frames from top to bottom.

10. The stacking apparatus according to claim 9, characterized in that, The first drive assembly includes a third lead screw and a third motor. The third lead screw is threadedly connected to the bottom of the support frame, and the third motor is driven by the third lead screw to drive the support frame to reciprocate on the third lead screw.

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