A stacked tail winding device

Abstract

This utility model discloses a stacking and winding device, including a winding assembly, a pressure roller assembly, and a flattening assembly. The winding assembly is used to fix and drive the battery cell to be wound. The pressure roller assembly is movably arranged relative to the winding assembly and is used to press the wound diaphragm to the surface of the battery cell during winding. The flattening assembly is used to blow air to flatten the part of the wound diaphragm that is not pressed by the pressure roller assembly. During winding, the flattening assembly first blows air onto the part of the diaphragm that is hanging down after being cut and not pressed by the pressure roller to flatten the diaphragm, avoiding folding and adhesion of the diaphragm. Then the winding assembly starts to rotate, and the pressure roller presses the part of the diaphragm that is not pressed to the surface of the battery cell to complete the winding. The above solution effectively avoids the problems of battery cell consistency and production continuity caused by folding and adhesion of the wound diaphragm during the winding process by setting the flattening assembly, and effectively improves battery cell quality and production efficiency.

Description

Technical Field

[0001] This utility model belongs to the technical field of battery production equipment, specifically, it relates to a stacking tail winding device. Background Technology

[0002] Lithium-ion batteries are characterized by high energy density, high power, and long lifespan, and are widely used in energy storage, 3C, automotive, and even military fields. The production equipment for lithium batteries is also constantly being updated and iterated with the development of lithium battery technology. At present, cell production is mainly carried out in two ways: winding and stacking. When using the stacking method to prepare cells, depending on the stacking process, some cells need to be rolled at the end after stacking. The end roll refers to covering the outermost layer of the cell with a separator after the cells are stacked.

[0003] In current stacking machines, the stacked cells are transferred to the tail winding needle, where they are fixed. A certain length of diaphragm is then cut for tail winding. Because there is a certain gap between the cutting position and the cell, the cut diaphragm hangs down under gravity and may fold and stick due to environmental factors or the friction of the cutter. Consequently, it cannot be smoothly wound onto the cell surface during tail winding. Although the diaphragm is usually pressed onto the cell surface by pressure rollers during tail winding, the pressure rollers cannot unfold the folded and stuck parts, which affects the cell quality and production efficiency.

[0004] In view of the above, this utility model is hereby proposed. Utility Model Content

[0005] In order to solve one of the problems in the prior art, this utility model provides a stacking and tail-winding device. By blowing air to flatten the part of the diaphragm that has not yet been pressed by the tail-winding pressure roller, the diaphragm is prevented from folding and sticking when it is cut, thus ensuring the smooth stacking and tail-winding.

[0006] To solve the above-mentioned technical problems, this utility model provides a stacking tail winding device, comprising,

[0007] Tail winding assembly, used to fix and drive the battery cell to rotate for tail winding;

[0008] The pressure roller assembly is movable relative to the tail winding assembly and is used to press against the surface of the battery cell during tail winding to compress the tail winding diaphragm.

[0009] The flattening assembly is used to blow air to flatten the portion of the tail roll diaphragm that is not pressed by the pressure roller assembly.

[0010] Furthermore, the flattening component moves synchronously with the pressure roller component.

[0011] Furthermore, the flattening assembly includes an air blower, which is a hollow cylinder with one end open, forming an air inlet at the open end. The air blower is arranged parallel to the axis of rotation of the tail roll assembly, and has an air outlet on its peripheral wall arranged along the length direction.

[0012] Furthermore, the airflow from the flattening assembly is tilted toward the side of the tail roll diaphragm that is not compressed.

[0013] Furthermore, the flattening assembly includes a connector that is connected to the pressure roller assembly, and the air blowing rod is detachably connected to the connector.

[0014] Furthermore, the connector is rotatably connected to the pressure roller assembly, and the axis of rotation of the connector is parallel to the air blowing rod. Furthermore, the connector includes a first connecting section and a second connecting section connected at an angle to the first connecting section. The first connecting section is connected to the pressure roller assembly, and the second connecting section has a through-hole that is parallel to the axis of rotation of the tail roll assembly. The air blowing rod is at least partially interference-fitted with the connecting hole.

[0015] Preferably, the angle between the first connecting segment and the second connecting segment is a right angle.

[0016] Furthermore, the first connecting section has a slide rail arranged along its length, and the pressure roller assembly has a protruding rotating shaft that cooperates with the slide rail; the rotating shaft also includes a locking mechanism for fixing the relative position of the rotating shaft and the slide rail.

[0017] Furthermore, the pressure roller assembly is provided with threaded holes, and the drive shaft is configured as a screw that mates with the threaded holes.

[0018] Furthermore, the pressure roller assembly is located above the tail roll assembly and can be moved horizontally relative to the tail roll assembly in the vertical direction. During tail roll, the part of the diaphragm that is not pressed by the pressure roller and the flattening assembly are located on both sides of the moving plane of the pressure roller assembly, respectively. The pressure roller assembly includes a support member and several pressure rollers that are spaced apart on the support member and can rotate freely. Channels for airflow are formed between adjacent pressure rollers and between the pressure rollers and the support member.

[0019] By adopting the above technical solution, this utility model has the following beneficial effects compared with the prior art.

[0020] 1. The flattening airflow blown by the flattening component flattens the tail-wound diaphragm, avoiding folding and sticking caused by the inertia and friction generated by the cutter when the diaphragm falls naturally. This ensures the smooth progress of the tail-wound process and effectively improves the quality of the battery cells and production efficiency.

[0021] 2. The flattening assembly is connected to the pressure roller assembly and is configured to be rotatable and / or slidable relative to the pressure roller assembly, which improves the adjustment flexibility of the flattening assembly, can adapt to the diaphragm flattening requirements under different process conditions, and improves the versatility of the tail winding device.

[0022] 3. The flattening assembly is located on the side of the pressure roller assembly away from the unpressed diaphragm, so that the flattening airflow is blown out from the gap between the pressure rollers of the pressure roller assembly and between the pressure roller and the support, avoiding excessive airflow intensity that could cause the diaphragm to wrinkle and stick, and also avoiding damage to the diaphragm caused by strong airflow; and, compared to the side closer to the unpressed diaphragm, it has a larger adjustment space. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the first structure of the stacking tail winding device of this utility model;

[0024] Figure 2 yes Figure 1 Side view of the stacking tail winding device shown;

[0025] Figure 3 This is a schematic diagram of the second structure of the stacking tail winding device described in this utility model;

[0026] Figure 4 This is a schematic diagram of the third structure of the stacking tail winding device of this utility model;

[0027] Figure 5 for Figure 4 Enlarged view of the structure at point A in the middle;

[0028] Figure 6 This is a schematic diagram of the fourth structure of the stacking tail winding device of this utility model;

[0029] Figure 7 for Figure 6 Enlarged view of the structure at point B.

[0030] In the diagram: 1. Tail roll assembly; 2. Pressure roller assembly; 21. Pressure roller; 22. Support component; 23. Rotating shaft; 24. Sliding component; 241. First sliding column; 242. Second sliding column; 3. Flattening assembly; 31. Air blowing rod; 32. Connecting component; 321. First connecting section; 322. Second connecting section; 323. Slide rail. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate this utility model, but are not intended to limit the scope of this utility model.

[0032] In the description of this utility model, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0033] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0034] This utility model provides a stacking tail winding device, such as Figures 1 to 7 As shown, the assembly includes a tail winding assembly 1, a pressure roller assembly 2, and a flattening assembly 3. The pressure roller assembly 2 is positioned above the tail winding assembly 1. The tail winding assembly has a rotating shaft 23 parallel to the rotating shaft of the pressure roller assembly 2, used to fix the battery cell and drive its rotation. The pressure roller assembly 2 can approach the tail winding assembly 1 and press against the surface of the battery cell during tail winding, pressing the tail winding diaphragm tightly against the surface of the battery cell as the tail winding assembly drives the battery cell to rotate. The flattening assembly 3 is also positioned above the tail winding assembly 1, located on one side of the pressure roller assembly 2, with its air outlet facing the unpressed portion of the tail winding diaphragm. It is used to blow air during tail winding to flatten the unpressed portion of the diaphragm. Figure 1 As shown, the pressure roller assembly 2 includes a support member 22 and a plurality of pressure rollers 21 that are spaced apart on the support member 22 and can rotate freely. The support member 22 includes a support plate that is perpendicular to the moving direction of the pressure roller assembly 2, and support arms that are spaced apart and extend outward from one side surface of the support plate along the moving direction of the pressure roller assembly 2. The support arms form a mounting area for mounting the pressure rollers 21. Typically, the pressure roller assembly 2 is as follows: Figure 2 As shown, the pressure roller 21 is positioned directly above the tail winding assembly 1. At this time, the rotation axis 23 of the pressure roller 21 is parallel to the rotation axis of the tail winding assembly 1. It is configured to move in a direction that is closer to or farther away from the tail winding assembly 1 in a vertical plane. Thus, during tail winding, the pressure roller 21 in the pressure roller assembly 2 can press the tail winding diaphragm tightly onto the surface of the battery cell. The pressure roller assembly 2 can be provided with only one pressure roller 21 with a relatively wide axial width, or multiple narrower pressure rollers 21 can be arranged side by side along the axial direction.

[0035] The working process of the stacking and tail-winding device is as follows: After the battery cells are stacked, they are transferred to the tail-winding assembly 1 by a robotic arm and fixed by the tail-winding assembly 1. Then, the pressure roller assembly 2 moves closer to the battery cells and presses the uncut diaphragm onto the surface of the battery cells. After that, the tail-winding assembly 1 starts to rotate and winds the diaphragm onto the surface of the battery cells. The pressure roller assembly 2 adjusts its position in real time as the tail-winding assembly 1 rotates and continuously presses the diaphragm wound onto the surface of the battery cells. After the diaphragm is cut, the part of the diaphragm that has not yet been wound onto the surface of the battery cells hangs down naturally due to gravity. However, it may fold and stick due to the friction of the cutter. At this time, the flattening assembly 3 blows air onto this part of the diaphragm to flatten it, effectively preventing the diaphragm from folding and sticking, and ensuring the stable and continuous operation of the stacking and tail-winding. In order to improve the flattening effect, the angle between the flattening airflow blown by the flattening assembly 3 and the side of the tail-winding diaphragm that has not been pressed is _____. Figure 2 The acute angle shown.

[0036] In the above scheme, the pressure roller assembly 2 and the flattening assembly 3 can move synchronously or independently. When moving synchronously, they can be connected to each other and moved by a single drive device, or they can be connected to two separate drive devices and moved separately. This utility model does not impose any restrictions on this.

[0037] The technical solution of this utility model will now be described in detail with reference to specific embodiments.

[0038] Example 1

[0039] As an embodiment of the present invention, this embodiment provides a stacking tail winding device, wherein the pressure roller assembly 2 is located directly above the tail winding assembly 1 and can be translatably arranged relative to the tail winding assembly 1 in the vertical direction, and the flattening assembly 3 is independently arranged with the pressure roller assembly 2 and connected to the driving device, and can be synchronously moved up and down with the pressure roller assembly 2 according to actual needs.

[0040] Specifically, such as Figure 1 and Figure 2 As shown, the flattening component 3 in this embodiment includes an air blowing rod 31. The air blowing rod 31 is a hollow straight rod parallel to the rotating shaft of the tail roll component 1. One end of the hollow straight rod is closed, and the other end is open and formed into an air inlet connected to the air supply device. The peripheral wall of the hollow straight rod has a plurality of air outlets spaced apart along the length of the hollow straight rod. The internal space of the hollow straight rod is connected to the outside through the air outlets, so that air can be blown outward from the side with the air outlets to form a flattening airflow. In this embodiment, the air outlets are evenly distributed along the axial direction of the air blowing rod 31. Alternatively, only one air outlet may be provided. The air outlet is rectangular, pill-shaped, or other shapes that can form a stable air curtain. It is located in the middle of the air blowing rod 31 and extends to both ends along the length direction.

[0041] To achieve synchronous movement of the air-blowing rod 31 with the pressure roller assembly 2, the flattening assembly 3 also includes a connector 32. The connector 32 has a fixing member for securing the air-blowing rod 31, and the driving device is connected to the connector 32. In this embodiment, the connector 32 includes a connecting plate. One side of the connecting plate is connected to the driving device, and the other side has a fixing member. The end of the fixing member away from the connecting plate forms a fixing hole for the air-blowing rod 31 to pass through. To ensure stable installation of the air-blowing rod 31, the inner circumferential wall of the fixing hole is provided with a rubber layer. During tail winding, the driving device... The device drives the air blowing rod 31 to move synchronously with the pressure roller assembly 2, so that the air outlet of the air blowing rod 31 faces the part of the tail-wound diaphragm that is not pressed by the pressure roller assembly 2. The diaphragm is flattened by the flattening airflow blown out by the air blowing rod 31 and then pressed by the pressure roller assembly 2, so as to achieve tight winding of the diaphragm to the battery cell. The number of fixing parts can be set to one or more. When set to one, it is preferred to be connected to the middle of the air blowing rod 31. When set to two or more, it is preferred to be evenly distributed from both ends of the air blowing rod 31 along the length direction toward the middle.

[0042] In this embodiment, the air blowing rod 31 and the pressure roller assembly 2 are also arranged above the tail winding assembly 1, located on the side of the pressure roller assembly 2 facing the part of the diaphragm that has not been pressed. The air outlet on the air blowing rod 31 is set vertically downward, blowing air towards the front side of the diaphragm's hanging position, so that the hanging part of the diaphragm floats up and flattens under the influence of the airflow, and then is pressed onto the surface of the cell by the pressure roller 21 as the tail winding assembly 1 rotates.

[0043] Example 2

[0044] As another embodiment of the present invention, the difference between this embodiment and the first embodiment is that the flattening component 3 is connected to the pressure roller component 2.

[0045] In this embodiment, the flattening assembly 3 includes a connector 32, an air blowing rod 31 connected to the connector 32, and the connector 32 is then connected to the pressure roller assembly 2. In order to facilitate the replacement and adjustment of the air blowing rod 31, the connector 32 and the air blowing rod 31, as well as the connector 32 and the pressure roller assembly 2, are all detachably connected.

[0046] Specifically, such as Figure 3As shown, the connector 32 in this embodiment is generally L-shaped, including a first connecting segment 321 and a second connecting segment 322 that are connected in sequence and perpendicular to each other. The end of the first connecting segment 321 away from the second connecting segment 322 is provided with a connecting structure that cooperates with the pressure roller assembly 2. The second connecting segment 322 has a connecting hole that is arranged through the first connecting segment 321 in a direction perpendicular to it. When the connector 32 is connected to the pressure roller assembly 2, the second connecting segment 322 is arranged parallel to the rotation axis 23 of the pressure roller 21 in the pressure roller assembly 2. The air blowing rod 31 is inserted into the connecting hole to achieve fixation. In this embodiment, in order to facilitate the installation and adjustment of the blowing direction of the air blowing rod 31, the air blowing rod 31 is interference-fitted with the connecting hole, that is, the diameter of the part of the air blowing rod 31 that extends into and stays in the connecting hole is slightly larger than the diameter of the connecting hole. In other embodiments, the included angle between the first connecting segment 321 and the second connecting segment 322 can also be adjusted according to actual needs, so as to keep the air blowing rod 31 parallel to the rotation axis 23 of the tail roll assembly 1; the air blowing rod 31 and the connecting hole can also be fixedly connected by mortise and tenon, insertion, snap-fit, integral molding, adhesive or other methods.

[0047] Furthermore, in order to achieve more precise adjustment of the blowing direction, the first connecting section 321 is configured to be hinged to the pressure roller assembly 2. That is, the first connecting section 321 is configured to be rotatable relative to the pressure roller assembly 2 with a rotating shaft parallel to the direction of the second connecting section 322. Thus, while the blowing angle of the blowing rod 31 is adjustable, the blowing height can also be adjusted by the relative rotation between the first connecting section 321 and the pressure roller assembly 2, which can more smoothly adapt to the diaphragm flattening requirements under different production conditions.

[0048] Similar to Embodiment 1, in this embodiment, one or more connectors 32 can be provided according to actual conditions. When one connector is provided, the connector 32 is preferably connected to the pressure roller assembly 2 from the side, that is, the blowing range of the blowing rod 31 will not be blocked by the connector 32, which can form a more uniform airflow and improve the flattening effect on the diaphragm.

[0049] Furthermore, in this embodiment, the air blowing rod 31 is also located on the side of the pressure roller assembly 2 facing the uncompressed portion of the diaphragm. Before starting the tail roll, the technician needs to install the air blowing rod 31 and adjust the blowing direction of the air blowing rod 31 by rotating the air blowing rod 31 and adjusting the angle between the connecting piece 32 and the pressure roller assembly 2, so as to smoothly flatten the diaphragm during the tail roll. In other embodiments, the angle between the pressure roller assembly 2 and the connecting piece 32 and the angle between the connecting piece 32 and the air blowing rod 31 can also be automatically adjusted in real time according to the detected diaphragm state.

[0050] Example 3

[0051] As another embodiment of the present invention, the difference between this embodiment and embodiment two is that the connection method between the connector 32 and the pressure roller assembly 2 is different.

[0052] In this embodiment, as Figure 4 As shown, the connector 32 is provided with a slide rail 323 arranged along the length direction, and the pressure roller assembly 2 has a sliding member 24 that cooperates with the slide rail 323. The two cooperate to realize that the connector 32 can be slidably arranged relative to the pressure roller assembly 2 along the slide rail 323.

[0053] In this embodiment, the slider 24 is disposed on the side of the pressure roller assembly 2 and is connected to the slide rail 323 from the side of the pressure roller assembly 2. It can be slidably disposed along the length of the slide rail 323. By adjusting the position of the slider 24 in the slide rail 323, the extension and retraction adjustment of the flattening assembly 3 in the length of the slide rail 323 can be realized, thereby enabling the selection of a more suitable blowing direction according to the actual situation.

[0054] In order to further improve the adjustability of the flattening component 3, such as Figure 5 As shown, the sliding member 24 in this embodiment includes a first sliding column 241 connected to the pressure roller assembly 2, and a second sliding column 242 connected to the end of the first sliding column 241 away from the pressure roller assembly 2. The cross-sectional shape of the first sliding column 241 and the second sliding column 242 is rectangular. They are coaxially arranged, and the cross-sectional area of ​​the second sliding column 242 perpendicular to the axial direction is larger than the cross-sectional area of ​​the first sliding column 241 perpendicular to the axial direction. The cross-sectional shape of the slide rail 323 is adapted to the first sliding column 241 and the second sliding column 242. When the two are engaged, the second sliding column 242 and at least part of the first sliding column 241 extend into the slide rail 323. While realizing the sliding connection between the two, it can prevent the connector 32 from falling off. In order to realize the mutual locking between the sliding member 24 and the slide rail 323, the sliding member 24 also includes a locking member that is retractably provided protruding from the surface of the second sliding column 242. The locking member increases the friction between the locking member and the slide rail 323, thereby realizing the relative static position of the connector 32 and the pressure roller assembly 2 when no adjustment is required.

[0055] Example 4

[0056] As another embodiment of the present invention, the difference between this embodiment and embodiment three is that the structure of the sliding member 24 is different; in this embodiment, the sliding member 24 is configured to cooperate with the slide rail 323 to achieve a slidable connection, while also enabling the connecting member 32 to be rotatably set relative to the pressure roller assembly 2 with the sliding member 24 as the axis.

[0057] Specifically, such as Figure 6 and Figure 7As shown, the sliding member 24 is an integrally cylindrical sliding column. While slidably connected to the slide rail 323, the slide rail 323 can rotate around the sliding column, further expanding the adjustment range of the blowing rod 31. The sliding column includes a first sliding column 241 connected to the pressure roller assembly 2, and a second sliding column 242 connected to the end of the first sliding column 241 away from the pressure roller assembly 2. Both the first sliding column 241 and the second sliding column 242 are cylindrical and coaxially arranged. The diameter of the second sliding column 242 is larger than the diameter of the first sliding column 241. The cross-sectional shape of the slide rail 323 is similar to that of the first sliding column 241 and the second sliding column 242. The two sliding posts 242 are adapted to each other. When they cooperate with each other, the second sliding post 242 and at least part of the first sliding post 241 extend into the slide rail 323. While realizing the sliding connection between the two, it can prevent the connector 32 from falling off. In this embodiment, the sliding post is a screw that is screwed to the pressure roller assembly 2. The threaded section and the screw head of the screw serve as the first sliding post 241 and the second sliding post 242, respectively. The side of the slide rail 323 opposite to the screw head is hollowed out. This setting can realize the locking and unlocking of the pressure roller assembly 2 and the connecting rod by adjusting the screw. In turn, it can realize the free adjustment of the blowing direction of the blowing rod 31.

[0058] In other embodiments, an independent locking mechanism can also be provided, which locks the connecting rod to the pressure roller assembly 2 after the connecting rod is adjusted to the correct position.

[0059] Example 5

[0060] As another embodiment of the present invention, the difference between this embodiment and embodiment four is that the flattening component 3 is positioned differently.

[0061] In this embodiment, the flattening component 3 is located on the side of the pressure roller assembly 2 away from the unpressed portion of the diaphragm, that is, with the moving plane of the pressure roller assembly 2 as the interface, the unpressed portion of the diaphragm and the flattening component 3 are located on opposite sides of the interface.

[0062] Specifically, when the pressure roller 21 is installed in place, there are gaps between it and the two adjacent support arms and the support plate. As a result, the airflow blown out by the flattening component 3 can pass through the gap between the pressure roller 21 and the support member 22 and flatten the part of the diaphragm that has not been compressed. Moreover, compared to blowing the airflow directly to the part of the diaphragm that has not been compressed in the form of a stable air curtain, the airflow passing through the gap between the pressure roller 21 and the support member 22 is blocked and forms turbulence, which causes the part of the diaphragm that has not been compressed to generate stronger disturbance. Even if the diaphragm has been folded and stuck together, it can be unfolded more smoothly, and the flattening effect is better.

[0063] The solution described in this embodiment not only has a superior flattening effect, but also ensures that the installation of the flattening component 3 is not affected by other devices. Typically, a cutting component is provided on the front side of the pressure roller assembly 2 near the unpressed portion of the diaphragm to clamp and cut the diaphragm. In order to ensure that the tail roll diaphragm length is appropriate, the interval between the cutting component and the pressure roller assembly 2 is usually small. It is difficult to set the flattening component 3 between the two, and mutual interference is likely to occur, affecting the normal stacking process. Furthermore, the adjustment space of the flattening component 3 is limited, and it cannot achieve fully free adjustment. However, by setting the flattening component 3 on the side of the pressure roller assembly 2 away from the unpressed portion of the diaphragm, mutual interference is avoided, and a wider space is provided for the adjustment of the flattening component 3, which is conducive to the flattening of the diaphragm and the smooth tail roll.

[0064] In other embodiments, the pressure roller assembly 2 can also be configured with other similar structures. For example, two support arms are vertically extended downwards at both ends of the support plate on the side facing the tail roll assembly 1. The ends of the two support arms away from the support plate are connected to the shaft of the pressure roller 21. The shaft of the pressure roller 21 has detachable limiting blocks spaced at intervals. When the pressure roller 21 is installed in place, any two adjacent pressure rollers 21 and the pressure roller 21 and the support arm are separated by the limiting blocks to form a certain gap.

[0065] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to preferred embodiments, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-described technical content to create equivalent embodiments without departing from the scope of the present utility model. The implementation schemes in the above embodiments can also be further combined or replaced. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A stacking tail winding device, characterized in that, include, Tail winding assembly (1) is used to fix and drive the battery cell to rotate for tail winding; The pressure roller assembly (2) is movably configured relative to the tail winding assembly (1) and is used to press against the surface of the battery cell during tail winding to compress the tail winding diaphragm. The flattening assembly (3) is used to blow air to flatten the portion of the tail roll diaphragm that is not pressed by the pressure roller assembly (2).

2. The stacking tail winding device according to claim 1, characterized in that, The flattening component (3) moves synchronously with the pressure roller component (2).

3. The stacking tail winding device according to claim 1, characterized in that, The flattening assembly (3) includes an air blower (31), which is a hollow cylinder with one end open. An air inlet is formed at the open end. The air blower (31) is arranged parallel to the shaft of the tail roll assembly (1), and an air outlet is arranged along the length direction on the peripheral wall.

4. The stacking tail winding device according to claim 3, characterized in that, The airflow from the flattening component (3) is tilted toward the side of the tail roll diaphragm that is not compressed.

5. The stacking tail winding device according to claim 3, characterized in that, The flattening assembly (3) includes a connector (32), which is connected to the pressure roller assembly (2), and the air blowing rod (31) is detachably connected to the connector (32).

6. The stacking tail winding device according to claim 5, characterized in that, The connector (32) is rotatably connected to the pressure roller assembly (2), and the rotation axis (23) of the connector (32) is parallel to the air blowing rod (31).

7. The stacking tail winding device according to claim 6, characterized in that, The connector (32) includes a first connecting section (321) and a second connecting section (322) connected to the first connecting section (321) at an angle. The first connecting section (321) is connected to the pressure roller assembly (2). The second connecting section (322) has a through connecting hole that is parallel to the shaft of the tail roll assembly (1). The air blowing rod (31) is at least partially interference-fitted with the connecting hole.

8. The stacking tail winding device according to claim 7, characterized in that, The angle between the first connecting segment (321) and the second connecting segment (322) is a right angle.

9. The stacking tail winding device according to claim 7, characterized in that, The first connecting section (321) has a slide rail (323) arranged along the length direction, and the pressure roller assembly (2) has a protruding rotating shaft (23) that cooperates with the slide rail (323); the rotating shaft (23) also includes a locking mechanism that fixes the relative position of the rotating shaft (23) and the slide rail (323).

10. The stacking tail winding device according to claim 9, characterized in that, The pressure roller assembly (2) has a threaded hole, and the drive shaft is configured as a screw that mates with the threaded hole.

11. The stacking tail winding device according to any one of claims 1-10, characterized in that, The pressure roller assembly (2) is located above the tail roll assembly (1) and can be moved horizontally relative to the tail roll assembly (1) in the vertical direction. When the tail roll is performed, the part of the diaphragm that is not pressed by the pressure roller (21) and the flattening assembly (3) are located on both sides of the moving plane of the pressure roller assembly (2). The pressure roller assembly (2) includes a support member (22) and several pressure rollers (21) that are spaced apart on the support member (22) and can rotate freely. A channel for airflow is formed between adjacent pressure rollers (21) and between the pressure rollers (21) and the support member (22).

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