A winding mechanism, a winding device, and a winding machine

Abstract

This utility model belongs to the technical field of lithium battery manufacturing equipment, and discloses a winding mechanism, a winding device, and a winding machine. The winding mechanism includes a first winding needle, a second winding needle, and a clamping assembly. The second winding needle is arranged opposite to the first winding needle, forming a receiving space. The first and / or second winding needles are movably arranged, and the receiving space has a first side located at the center and a second side located at the edge. The clamping assembly is disposed on the first and / or second winding needles and located within the receiving space. The clamping assembly is used to clamp the material strip and is located near the second side. This utility model can significantly reduce the auxiliary time in the material strip winding process, thereby improving lithium battery production efficiency, reducing the number of winding machines on the production line, and solving production cost issues.

Description

Technical Field

[0001] This utility model relates to the field of lithium battery manufacturing equipment technology, and in particular to a winding mechanism, winding device and winding machine. Background Technology

[0002] In current lithium battery production equipment, wound cells are widely used due to their advantages such as stable performance and high manufacturing efficiency.

[0003] In the production process of wound lithium-ion batteries, the separator and positive and negative electrode sheets need to be wound.

[0004] In existing winding mechanisms, when winding the diaphragm, auxiliary processes require the extension of the winding needle and the clamping action of the inner needle placed in the center position, which results in a relatively long auxiliary time in the diaphragm winding process and low production efficiency. Utility Model Content

[0005] The purpose of this invention is to provide a winding mechanism, winding device, and winding machine that can reduce the auxiliary time in the strip winding process, thereby improving the production efficiency of lithium batteries, reducing the number of winding machines on the production line, and solving the production cost problem.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] The first aspect relates to a winding mechanism, which includes:

[0008] First roll of needles;

[0009] The second coil of needle is disposed opposite to the first coil of needle and forms a receiving space with the first coil of needle. The first coil of needle and / or the second coil of needle are movably disposed. The receiving space has a first side located at the center and a second side located at the edge.

[0010] A clamping assembly is disposed on the first and / or the second needle coil and located within the receiving space, the clamping assembly being used to clamp the material strip, the clamping assembly being close to the second side.

[0011] The second aspect relates to a winding device, which includes a turntable and a winding mechanism. Multiple winding mechanisms are arranged at intervals along the circumference of the turntable, and the turntable is used to drive the winding mechanism to rotate and switch positions.

[0012] The third aspect relates to a winding machine, which includes an adhesive applicator, a feeding device, and the above-mentioned winding device.

[0013] Beneficial effects:

[0014] In the first aspect of this application, the winding mechanism, while performing the basic actions of clamping and winding the material strip, effectively solves the problem of setting an inner needle structure on the first side or near the first side by clamping the material strip through the clamping component, completely eliminating the locking action of the inner needle. Furthermore, by setting the clamping component close to the second side and using the clamping component to effectively ensure the head of the material strip is clamped, it avoids the material strip being guided into the depth of the receiving space, shortens the auxiliary time of the material strip in the clamping operation process, thereby improving the lithium battery production efficiency, reducing the number of winding machines on the production line, and solving the production cost problem.

[0015] In the second aspect of this application, the winding device based on this winding mechanism can ensure production structure, shorten production time, improve efficiency, and reduce costs.

[0016] In the second aspect of this application, the winding machine using the above-mentioned winding device can achieve the integration of multiple processes of the battery cell, thereby improving production efficiency. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the winding mechanism provided in an embodiment of the present invention;

[0018] Figure 2 This is a schematic diagram of the clamping assembly provided in an embodiment of the present utility model;

[0019] Figure 3 This is a schematic diagram of the structure of the mounting base provided in an embodiment of this utility model;

[0020] Figure 4 This is a partial structural schematic diagram of the winding device provided in this utility model embodiment.

[0021] In the picture:

[0022] 100. Storage space; 110. First side; 120. Second side; 200. Material belt; 300. Turntable;

[0023] 1. First roll of needles;

[0024] 2. Second roll of needles;

[0025] 3. Clamping assembly; 31. Clamping piece; 311. Connecting section; 3111. Through hole; 3112. Connecting boss; 312. Clamping section; 3121. Clamping part; 32. Gasket; 33. Mounting base; 331. Slot. Detailed Implementation

[0026] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0027] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0028] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0029] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, 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. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0030] Please see the appendix Figure 1 The first aspect of this embodiment relates to a winding mechanism, which includes a first winding needle 1, a second winding needle 2, and a clamping assembly 3. The second winding needle 2 is disposed opposite to the first winding needle 1, forming a receiving space 100. The first winding needle 1 and / or the second winding needle 2 are movably disposed. The receiving space 100 has a first side 110 located at the center and a second side 120 located at the edge. The clamping assembly 3 is disposed on the first winding needle 1 and / or the second winding needle 2 and located within the receiving space 100. The clamping assembly 3 is used to clamp a strip 200 and is located near the second side 120.

[0031] Specifically, the first spindle 1 and the second spindle 2 are both semi-cylindrical structures, and they can move relative to each other, meaning one of them can move relative to the other to adjust the size of the accommodating space 100. Furthermore, both the first spindle 1 and the second spindle 2 can move to bring them closer together or further apart. Based on the lithium battery manufacturing process, this strip 200 can be a separator, a positive electrode sheet, or a negative electrode sheet.

[0032] Furthermore, a clamping component 3 is provided within the accommodating space 100. The clamping component 3 can be independently mounted on either the first needle coil 1 or the second needle coil 2, or it can be connected to both the first needle coil 1 and the second needle coil 2. The clamping component 3 can be driven independently to clamp the material strip 200. Inside the accommodating space 100 formed by the first needle coil 1 and the second needle coil 2, the clamping component 3 is positioned on the second side 120 near the edge.

[0033] In the winding process, the first and second winding needles 1 and 2 are first moved apart to increase the width of the accommodating space 100, accommodating the operation of the clamping assembly 3 and the feeding action of the strip 200. During the clamping of the strip 200, different sizes of the accommodating space 100 correspond to different winding diameters of the strip 200. Those skilled in the art can adjust the distance between the first and second winding needles 1 and 2 according to the required winding diameter. The head of the strip 200 is then fed into the accommodating space 100, where it is stably clamped by the clamping assembly 3. The first and second winding needles 1 and 2 are then brought closer together and adjusted to a preset position. The strip 200 is then wound around the outside of the first and second winding needles 1 and 2 by driving them to rotate.

[0034] In this embodiment, the clamping component 3 alone can be used to clamp the head of the strip 200. In other embodiments, the clamping component 3 can be used in conjunction with the combined action of the first winding needle 1 or the second winding needle 2 to clamp the head of the strip 200, thereby reducing the complexity of the overall structure.

[0035] In this embodiment, while performing the basic actions of clamping and winding the strip 200, the winding mechanism effectively solves the problem of setting an inner needle structure on the first side 110 or near the first side 110 by clamping the strip 200, and completely eliminates the locking action of the inner needle. Furthermore, by setting the clamping component 3 close to the second side 120 and using the clamping component 3 to clamp the head of the strip 200, the strip 200 is further prevented from being guided into the deep center of the receiving space 100, shortening the auxiliary time of the strip 200 in the clamping operation process, thereby improving the lithium battery production efficiency, reducing the number of winding machines on the production line, and solving the production cost problem.

[0036] According to test data, this winding mechanism can shorten auxiliary time by 4 seconds during the actual winding process. Furthermore, it can reduce the number of non-continuous standard winding machines for 200mm strip by two at conventional winding stations, effectively saving production costs. The elimination of the inner winding needle also avoids the efficiency reduction caused by equipment downtime during inner needle maintenance and cleaning.

[0037] Optionally, the winding mechanism includes a drive member (not shown in the figure), which is connected to the clamping assembly 3 in a transmission manner. The drive member is used to drive the clamping assembly 3 to clamp the material strip 200.

[0038] In this embodiment, the driving component can be a drive motor or a drive cylinder, and the clamping assembly 3 is directly driven to the driving component. This direct drive connection reduces or eliminates intermediate transmission links, resulting in a more compact internal structure and saving space. Furthermore, the clamping assembly 3 can be directly integrated into the driving component, forming a clamping module capable of independently performing clamping actions, further enhancing the structural compactness.

[0039] It should be noted that in this winding mechanism, the drive source for the clamping assembly 3 is different from the drive source for the relative movement of the first winding needle 1 and the second winding needle 2. The independent control of their movements ensures that the relative movement and rotation between the first winding needle 1 and the second winding needle 2, as well as the clamping action of the clamping assembly 3, do not interfere with each other.

[0040] Optionally, the distance between the clamping component 3 and the first side 110 is at least 0.9 times the radius of the first coil needle 1 or the second coil needle 2.

[0041] In this embodiment, the clamping component 3 should be positioned as close to the edge as possible to ensure the effectiveness of reducing auxiliary working time. Adaptively, the distance between the clamping component 3 and the first side 110 is at least 0.9 times the radius of the first coil needle 1 or the second coil needle 2. When the clamping component 3 is positioned within this range relative to the first side 110, the full utilization of the head size of the strip 200 can be ensured, while also guaranteeing the effective reduction of auxiliary working time.

[0042] Please see the appendix Figure 2 and attached Figure 3 Optionally, the clamping assembly 3 includes two opposing clamping pieces 31, which are close to each other to clamp the strip 200.

[0043] Specifically, the clamping piece 31 is a long strip-shaped plate structure. Two clamping pieces 31 are arranged opposite to each other. The driving member can drive either clamping piece 31 individually to move closer to or away from the other clamping piece 31, or it can drive both clamping pieces 31 to move closer to or away from each other at the same time, thereby achieving the clamping of the material strip 200.

[0044] Optionally, the clamping assembly 3 includes a mounting base 33, which is connected to the drive component, and the clamping piece 31 is detachably connected to the mounting base 33.

[0045] Specifically, the mounting base 33 has a split structure, with each of its two parts connected to a corresponding clamping piece 31. Multiple slots 331 are provided along the length of the mounting base 33, and multiple connecting bosses 3112 are formed on the clamping pieces 31. The clamping pieces 31 are sequentially inserted into the slots 331 via the connecting bosses 3112, using an interference fit connection to facilitate the installation and removal of the clamping pieces 31. A driving component drives the mounting base 33 to bring the two clamping pieces 31 closer together and achieve a clamping action.

[0046] Optionally, the clamp 31 includes a connecting section 311 and a clamping section 312. The clamping section 312 is used to clamp the material strip 200. The clamping section 312 is connected to one end of the connecting section 311, and the other end of the connecting section 311 is detachably connected to the mounting base 33.

[0047] Specifically, the overhanging portion of the clamping piece 31 forms a clamping section 312, with two opposing clamping sections 312 positioned close to each other to clamp the head of the strip 200. A connecting boss 3112 is located at the other end of the connecting section 311 and is inserted into the mounting base 33.

[0048] In this embodiment, the clamping piece 31 is an integral plate, manufactured by integral molding, which avoids the need for additional connection processes or additional connection components between the connecting section 311 and the clamping section 312, thereby ensuring cost reduction.

[0049] Optionally, the clamping section 312 extends into the receiving space 100 along the material strip 200 with a dimension of 10mm to 15mm.

[0050] In this embodiment, the specific dimensions of the clamping segment 312 extending into the receiving space 100 along the material strip 200 should match the length of the clamped portion of the material strip 200 head, and need to be determined according to the design dimensions required to be clamped at the head of the material strip 200, typically 10mm to 15mm. This dimension needs to balance the clamping reliability of the material strip 200 and the structural compactness of the entire clamping piece 31. Within this range, the larger the clamping size, the longer the material strip 200 is clamped by the clamping segment 312, resulting in more reliable clamping, but significantly increasing the size of the clamping piece 31, leading to a decrease in structural compactness. Those skilled in the art can determine the specific value within this dimension range by comprehensively considering clamping reliability and structural compactness; this embodiment does not limit the specific value.

[0051] Optionally, a gasket 32 ​​is provided on one side of each of the two clamping sections 312 that faces each other.

[0052] In this embodiment, the body of the clamping piece 31 is typically made of metal to ensure that it has stable rigidity and support, and that it does not deform or is not easily deformed when the clamping action is applied, thus ensuring the stability of the clamping of the strip 200. Additionally, the gasket 32 ​​should be made of a material that increases friction during the clamping of the strip 200 head, or have micro-textures formed on its surface to enhance friction. This ensures that the strip 200 receives greater friction during the winding of the first and second needle coils, thereby guaranteeing clamping stability.

[0053] Optionally, the connecting segment 311 has an array of through holes 3111.

[0054] Specifically, the through hole 3111 is a circular hole. The through hole 3111 can directly reduce the material used in the clamping piece 31 and reduce the weight of the clamping piece 31 without affecting the connection strength.

[0055] Optionally, at least one clamping segment 312 includes a plurality of clamping portions 3121 arranged sequentially at intervals along the extending direction of the clamping piece 31.

[0056] In this embodiment, a plurality of clamping parts 3121 arranged at intervals in sequence constitute a clamping section 312, so that the clamping section 312 is formed as a non-continuous comb structure, and gaps are formed between the clamping parts 3121. During the clamping process of the material strip 200, the gaps allow the material strip 200 to be tensioned in segments along its width direction, effectively avoiding wrinkles in the material strip 200 during the clamping process.

[0057] In this embodiment, the extension length of the clamping piece 31 needs to be greater than the width of the strip 200 so that the strip 200 is clamped by the clamping piece 31 along the width direction.

[0058] Optionally, the winding mechanism also includes a pressure roller that squeezes the material strip 200 and conveys the material strip 200 into the clamping assembly 3.

[0059] Specifically, the pressure roller adopts a roller-feeding method. Before the strip 200 enters the winding mechanism, the pressure roller provides a defined and stable contact point for the strip 200, thereby ensuring the accuracy of the delivery position. In addition, the moderate pressure applied by the pressure roller forms a small tension control point on the path of the strip 200, which helps to absorb any small fluctuations in the upstream unwinding tension, smoothly transmits the tension, and provides a relatively stable tension environment before the strip 200 enters the clamping assembly 3.

[0060] By squeezing the material belt 200 and tensioning it, it is conveyed between the two clamps 31, which eliminates the pushing action of the first and second needle rolls 1 and 2, further shortening the auxiliary working time.

[0061] Please see the appendix Figure 4The second aspect of this embodiment also relates to a winding device, which includes a turntable 300 and more winding mechanisms. Multiple winding mechanisms are arranged at intervals along the circumference of the turntable 300. The turntable 300 is used to drive the winding mechanisms to rotate and switch positions.

[0062] Specifically, the turntable 300 integrates a drive source for rotating the turntable 300. A connecting arm is arranged at regular angles along the circumference of the turntable 300, with the end of the connecting arm furthest from the turntable 300 used to connect to the winding mechanism. In this embodiment, three sets of winding mechanisms are arranged on the same turntable 300, with a connecting arm arranged every 120° to connect the winding mechanisms. The first winding needle 1 and / or the second winding needle 2 are adjustablely positioned on the connecting arm. Simultaneously, the first winding needle 1, the second winding needle 2, and the clamping assembly 3 can rotate relative to the connecting arm. Furthermore, the connecting arm can also be connected to the drive source used to drive the rotation of the first winding needle 1 and the second winding needle 2.

[0063] The turntable 300 enables the transfer of multiple winding mechanisms between processes. For example, specific stations include a winding station, an adhesive application station, and a material unloading station. When the turntable 300 drives the winding mechanism to the winding station, the winding mechanism can clamp and wind the material strip 200.

[0064] The winding device based on this winding mechanism can ensure production structure, shorten production time, improve efficiency, and reduce costs.

[0065] The third aspect of this embodiment also relates to a winding machine, which includes an adhesive applicator, a feeding device, and the above-mentioned winding device.

[0066] Specifically, the adhesive application device is set at the adhesive application station, and the unloading device is set at the unloading station. The turntable 300 can be used to complete the winding, adhesive application and unloading of the battery cells in sequence.

[0067] This winding machine enables the integration of multiple processes in battery cell production, thereby improving production efficiency.

[0068] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A winding mechanism characterized by, include: First roll of needles (1); The second coil needle (2) is disposed opposite to the first coil needle (1) and forms a receiving space (100) with the first coil needle (1). The first coil needle (1) and / or the second coil needle (2) are movably disposed. The receiving space (100) has a first side (110) located at the center and a second side (120) located at the edge. A clamping assembly (3) is disposed on the first coil needle (1) and / or the second coil needle (2) and located within the receiving space (100). The clamping assembly (3) is used to clamp the strip (200) and is located near the second side (120).

2. The winding mechanism according to claim 1, characterized in that, The distance between the clamping assembly (3) and the first side (110) is at least 0.9 times the radius of the first coil needle (1) or the second coil needle (2).

3. The winding mechanism according to claim 1, characterized in that, The winding mechanism includes a driving member, which is connected to the clamping assembly (3) for driving the clamping assembly (3) to clamp the strip (200).

4. The winding mechanism according to claim 3, characterized in that The clamping assembly (3) includes two opposing clamping pieces (31), and the driving member drives the two clamping pieces (31) to move closer to each other to clamp the strip (200).

5. The winding mechanism according to claim 4, characterized in that The clamping assembly (3) includes a mounting base (33), the driving member is driven to the mounting base (33), and the clamping piece (31) is detachably connected to the mounting base (33).

6. The winding mechanism according to claim 5, characterized in that, The clamp (31) includes a connecting section (311) and a clamping section (312). The clamping section (312) is used to clamp the material strip (200). The clamping section (312) is connected to one end of the connecting section (311), and the other end of the connecting section (311) is detachably connected to the mounting base (33).

7. The winding mechanism according to claim 6, characterized in that The connecting segment (311) has multiple through holes (3111) arranged in an array.

8. The winding mechanism of claim 6, wherein, A pad (32) is provided on one side of the two clamping sections (312) facing each other.

9. The winding mechanism of claim 6, wherein, The clamping section (312) extends into the receiving space (100) along the material strip (200) with a dimension of 10mm to 15mm.

10. The winding mechanism of claim 6, wherein, At least one clamping section (312) includes a plurality of clamping portions (3121) arranged sequentially at intervals along the extending direction of the clamping piece (31).

11. A winding mechanism according to any one of claims 4-9, characterized in that The winding mechanism further includes a pressure roller that squeezes the strip (200) and conveys the strip (200) into the clamping assembly (3).

12. A winding device, characterized by The device includes a turntable (300) and a winding mechanism as described in any one of claims 1-11, wherein a plurality of the winding mechanisms are arranged at circumferential intervals along the turntable (300), and the turntable (300) is used to drive the winding mechanisms to rotate and switch work positions.

13. A winding machine, characterized in that, It includes an adhesive applicator, a feeding device, and a winding device as described in claim 12.

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