Winding needle support assembly, winding device and battery cell processing equipment

Abstract

This invention discloses a needle winding support assembly, comprising a support member for supporting the ends of the first and second needle structures of a variable-diameter needle winding assembly. On the mating surface of the support member, a first needle support hole is formed inwardly at the center, and at least one movable second needle support hole is formed inwardly at a radially spaced position relative to the first needle support hole. The movable second needle support hole provides radial movement space for the end of the movable second needle. The inner wall of the movable second needle support hole, relative to the first needle support hole, is set as a slope at its radially proximal end, and an elastic pressing component is provided on the inner wall of its radially distal end to press the end of the movable second needle against the slope. When the needle winding support assembly of this invention is mated with a variable-diameter needle winding assembly, it can accommodate the radial adjustment of the movable second needle in the variable-diameter needle winding assembly and provide stable support for the end of the movable second needle, preventing vibration of the end of the movable second needle during winding, thereby achieving stable winding.

Description

Technical Field

[0001] This invention belongs to the field of battery processing technology, specifically relating to a winding needle support assembly and corresponding battery winding device and battery processing equipment in the battery cell winding process. Background Technology

[0002] With the development of technology, various types of batteries are widely used in consumer products and industrial production. Among them, wound batteries are widely promoted and used by the industry due to their many outstanding advantages. The cells of wound batteries are processed by a cell winding device. The cell winding device usually separates and unwinds the positive and negative electrode sheets and the separator, and then concentrates them on a winding needle assembly to form a wound cell.

[0003] The needle winding assembly is the core component of a battery cell winding device. A typical needle winding assembly includes a needle holder, a first needle structure, and a second needle structure. The first and second needle structures are arranged in parallel, with their roots both located on the needle holder. The first needle structure is used to clamp the head of the material (positive electrode sheet, separator, and negative electrode sheet laminated composite material). The second needle structure is located outside the first needle structure and is used to control the winding radius. In traditional needle winding assemblies, the second needle structure is fixed on the needle holder, meaning the winding radius cannot be adjusted, resulting in poor compatibility and ease of use. This can also affect the quality of certain battery cells during winding. To address these issues, the industry has developed variable-diameter needle winding assemblies, which can flexibly change the parallel distance between the second needle structure and the first needle structure, thereby adjusting the winding radius (i.e., the winding circumference) in a timely manner to adapt to corresponding processing techniques and improve battery cell quality.

[0004] In addition, in order to make the winding process of the needle coiling assembly more stable, a needle coiling support assembly is usually set on the opposite side of the needle coiling assembly. The needle coiling support assembly is used to connect with the ends (the opposite ends of the roots, i.e. the ends away from the needle seat) of the first needle structure and the second needle structure, thereby providing support for the ends of the first needle structure and the second needle structure.

[0005] For non-variable diameter needle coil assemblies, the needle coil support assembly is easy to implement; it simply requires setting corresponding insertion and positioning structures at the ends of the first and second needle structures on the needle coil support assembly. For example, the applicant can achieve this by... Figure 1 and Figure 2 One solution is provided: on the mating surface of the needle support member 910 of the needle support assembly 900, a first needle support hole 911 is provided inward at the center position, and a second needle support groove 912 is provided inward around the first needle support hole 911. The first needle support hole 911 and the second needle support groove 912 respectively form absolute limits in the radial direction for the ends of the first needle structure and the second needle structure.

[0006] However, for variable diameter winding needle assemblies, because the second needle structure moves radially relative to the first needle structure, current winding needle support assemblies can only support the end of the first needle structure and cannot effectively support the end of the second needle structure. During winding, due to centrifugal force and other factors, the second needle structure, especially its end, is prone to vibration. Without effective support, this can easily lead to poor cell winding and damage to the needle structure. Summary of the Invention

[0007] The present invention aims to provide a needle coil support assembly, a winding device, and a battery cell processing equipment, with the purpose of improving the support performance of the second needle structure of the variable diameter needle coil assembly.

[0008] In a first aspect, the present invention provides a needle coil support assembly, comprising a support member for supporting the ends of a first needle structure and a second needle structure of a variable diameter needle coil assembly, wherein the second needle structure includes at least one movable second needle; and a first needle support hole is provided inwardly at the center position on the mating surface of the support member.

[0009] On the mating surface of the support member, at least one movable second needle support hole is provided inward at a position radially spaced from the first needle support hole; the movable second needle support hole provides radial movement space for the end of the movable second needle; the inner wall of the movable second needle support hole near the radial end is set as an inclined surface relative to the first needle support hole, and an elastic pressing component is provided on the inner wall of the movable second needle far the radial end to press the end of the movable second needle against the inclined surface.

[0010] As a preferred technical solution, the elastic clamping component is a ball screw, the threaded portion of which is adjustablely mounted on the inner wall of the radially distal end, and the steel ball of the ball screw presses the end of the movable second pin against the inclined surface under the action of the spring of the ball screw.

[0011] As a preferred technical solution, the support includes a rotating shaft and an annular end sleeve, the annular end sleeve being fixedly sleeved on the periphery of the end of the rotating shaft; the first needle support hole is formed by opening axially inward from the end of the rotating shaft.

[0012] As a preferred technical solution, the movable second needle support hole is formed by opening inward from the end face of the annular end sleeve, and the elastic clamping component is disposed on the wall between the movable second needle support hole and the outer peripheral surface of the annular end sleeve.

[0013] As a preferred technical solution, the movable second needle support hole is formed by radially opening inward from a predetermined position on the outer periphery of the annular end sleeve and being limited by a limiting plate set at the predetermined position. The inner wall of the limiting plate serves as the inner wall of the movable second needle support hole at the radially distal end relative to the first needle support hole. The elastic pressing component is disposed on the limiting plate.

[0014] As a preferred technical solution, the portion of the annular end sleeve located on both sides of the predetermined position is flattened and the limiting plate is fixedly installed.

[0015] As a preferred technical solution, the second needle structure includes two movable second needles, which are respectively located on the radial sides of the first needle structure; there are two movable second needle support holes, which are respectively disposed on the radial sides of the first needle support hole; and each movable second needle support hole is fitted with the elastic clamping component.

[0016] As a preferred technical solution, the second needle structure includes a fixed second needle and a movable second needle, which are located on the radial sides of the first needle structure, respectively; on the mating surface of the support member, a fixed second needle support hole and a movable second needle support hole are respectively opened at a distance from the radial sides of the first needle support hole; the fixed second needle support hole is used for the end of the fixed second needle to be inserted and fixedly confined therein.

[0017] As a preferred technical solution, the needle coiling support assembly further includes a mounting seat and a sliding bushing. The sliding bushing is axially slidably fitted inside the mounting seat, and the main shaft and root of the rotating shaft of the support member are rotatably and axially restricted to sliding within the sliding bushing.

[0018] As a preferred technical solution, a limiting post is provided on the outer periphery of the annular end sleeve, and the mounting seat sleeve has a limiting piece extending toward the annular end sleeve, with a limiting groove axially formed on the limiting piece; when the support member slides forward relative to the mounting seat sleeve with the sliding bushing, the limiting post slides out of the limiting groove, allowing the support member to rotate relative to the sliding bushing; when the support member returns to its original position relative to the mounting seat sleeve with the sliding bushing, the limiting post is embedded in the limiting groove.

[0019] In a second aspect, the present invention provides a battery cell winding device, comprising a variable diameter winding needle assembly and a winding needle support assembly, wherein the variable diameter winding needle assembly comprises a needle holder, a first needle structure and a second needle structure, the second needle structure comprising at least one movable second needle; and the winding needle support assembly adopts the winding needle support assembly described above.

[0020] A third aspect of the present invention provides a battery cell processing apparatus, including a positive electrode unwinding device, a negative electrode unwinding device, a separator unwinding device, and a battery cell winding device; the winding needle support assembly adopts the winding needle support assembly described above.

[0021] In the above-mentioned technical solution of the present invention, when the needle support assembly and the variable diameter needle assembly are connected, the second needle support hole opened on the connection surface of the support member can first provide radial movement space for the end of the movable second needle of the needle support assembly. Moreover, the inclined inner wall of the movable second needle support hole relative to the radially proximal end of the first needle support hole can smoothly adapt to the radial distance adjustment of the movable second needle relative to the first needle structure. Then, the elastic pressing component provided on the inner wall of the movable second needle support hole relative to the radially distal end of the first needle support hole presses the end of the movable second needle onto the inclined surface. In this way, the needle support assembly can not only adapt to the radial adjustment of the movable second needle in the variable diameter needle assembly, but also form a stable support for the end of the movable second needle, avoiding the end of the movable second needle from vibrating during the winding process, and achieving stable winding after the needle circumference changes. Attached Figure Description

[0022] Figure 1 A perspective view of the needle support assembly in the background art provided to the applicant.

[0023] Figure 2 A longitudinal cross-sectional view of the needle support assembly in the background art provided to the applicant.

[0024] Figure 3 This is a longitudinal cross-sectional assembly diagram of an exemplary needle coil assembly provided in a specific embodiment of the present invention.

[0025] Figure 4 This is an exploded longitudinal cross-sectional view of an exemplary needle coiling assembly provided in a specific embodiment of the present invention.

[0026] Figure 5 This is a perspective view of the needle coil support assembly provided in a specific embodiment of the present invention.

[0027] Figure 6 This is a frontal projection view of the mating surface of the needle support assembly provided in a specific embodiment of the present invention.

[0028] Figure 7 This is a side view of the needle support assembly provided in a specific embodiment of the present invention.

[0029] Figure 8 for Figure 6 The diagram shows a cross-sectional view (AA) of the needle coil support assembly.

[0030] Figure 9This is a cross-sectional view of the needle winding support assembly and the needle winding assembly after docking in a specific embodiment of the present invention.

[0031] Figure 10 for Figure 9 A magnified view of the S-shaped section. Detailed Implementation

[0032] The technical solutions of the embodiments of the present invention will be explained and described below with reference to the accompanying drawings. However, the following embodiments are only preferred embodiments of the present invention and not all of them. Other embodiments obtained by those skilled in the art based on the embodiments in the implementation methods without creative effort are all within the protection scope of the present invention.

[0033] In the description of this invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise", "front", "back", etc., indicating the orientation or positional relationship, are all based on the orientation or relative positional relationship shown in the accompanying drawings, and are intended to facilitate a clear description of the structure of the product or device, and are not intended to limit the actual orientation of the product or device during production, use, sales, etc.

[0034] Furthermore, the terms "first" and "second" are used only for distinguishing purposes in the description and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more, unless otherwise expressly defined.

[0035] It should be noted that the axial and radial directions mentioned in the embodiments of the present invention are based on the rotation axis of the coiling needle. That is, the axial direction refers to the direction parallel to the rotation axis of the coiling needle, and the radial direction refers to the direction perpendicular to the rotation axis of the coiling needle.

[0036] This invention provides a needle winding support assembly and related battery cell winding device and battery cell processing equipment, with the aim of improving the support performance of the second needle structure of a variable diameter needle winding assembly. Since the needle winding support assembly is used in conjunction with the needle winding assembly, before describing the needle winding support assembly, this paper first introduces a variable diameter needle winding assembly by way of example.

[0037] Combination Figure 3 and Figure 4As shown, the variable diameter needle winding assembly 800 includes a needle holder 810, a first needle structure 820, and a second needle structure 830. The first needle structure 820 and the second needle structure 830 are arranged in parallel, and their roots are both located on the needle holder 810. The first needle structure 820 is used to clamp the head of the material (positive electrode sheet, separator, and negative electrode sheet laminated composite material). The second needle structure 830 includes a movable second needle 831 and a fixed second needle 832, which are respectively located on both radial sides of the first needle structure 820.

[0038] The second active needle 831 is radially movable on the needle holder 810, and its radial movement is finely adjusted by a drive mechanism on the needle holder (see [link]). Figure 4 (As indicated by the middle arrow line); the fixed second needle 832 is fixedly disposed on the needle holder 810. Based on this, the second needle structure 830 can realize the adjustment of the winding radius. Of course, the fixed second needle can also be replaced by a movable second needle, that is, the second needle structure 830 includes two movable second needles. The two movable second needles can be finely adjusted radially by their respective independent drive mechanisms, or they can be finely adjusted radially simultaneously by a single drive mechanism. The drive mechanism can be implemented by existing technology and is not within the scope of protection of this invention, and will not be described in detail here.

[0039] In addition, a coiled outer sleeve 840 is provided on the outside of the movable second needle 831 and the fixed second needle 832 or the two movable outer needles respectively. The shape of the coiled outer sleeve 840 matches the shape of the wound battery cell. For example, when winding a cylindrical battery cell, the two coiled outer sleeves 840 are usually arc-shaped shells. This part is also prior art and will not be described in detail here.

[0040] Based on the above-described variable diameter needle coil assembly 800 or a similar needle coil assembly, the needle coil support assembly provided in the specific embodiments of the present invention will be described in detail below.

[0041] Combination Figure 5 , Figure 6 , Figure 7 and Figure 8 As shown, in a basic embodiment, the needle support assembly 100 includes a support member 10 for supporting the ends of the first needle structure 820 and the second needle structure 830 of the variable diameter needle assembly 800. The support member 10 has a mating surface 11 opposite to the variable diameter needle assembly.

[0042] As one specific implementation, for the case where the second needle structure 830 of the variable diameter needle assembly 800 includes a movable second needle 831 and a fixed second needle 832, the structural design of the support member 10 is as follows:

[0043] On the mating surface 11 of the support member 10, a first needle support hole 12 is provided inward at the center position; at the same time, on the mating surface 11 of the support member 10, a movable second needle support hole 13 and a fixed second needle support hole 14 are respectively provided at radial intervals on both sides of the first needle support hole 12.

[0044] The movable second needle support hole 13 provides radial movement space for the end of the movable second needle 831; the inner wall 131 of the radially proximal end of the movable second needle support hole 13 is set as a slope relative to the first needle support hole 12 (see...). Figure 8 As shown), preferably, the end of the movable second needle 831 that mates with the bevel is also provided with a bevel 8311 (see...). Figure 3 (As shown); In addition, the inner wall 132 at the radially distal end of the movable second pin support hole 13 relative to the first pin support hole 12 is provided with an elastic clamping component 15 that presses the end of the movable second pin 831 against the inclined surface (i.e., the inner wall 131). The fixed second pin support hole 14 is used for inserting and fixing the end of the fixed second pin 832 within it. The fixing and limiting here means that the end of the fixed second pin 832 will not move radially, circumferentially, or rotate relative to the support member 10.

[0045] As another specific implementation, for the case where the second needle structure 830 of the variable diameter needle assembly 800 includes two movable second needles, the structural design of the support member 10 is as follows:

[0046] On the mating surface 11 of the support member 10, a first needle support hole 12 is provided inwardly at the center position; at the same time, since the two movable second needles are respectively located on both radial sides of the first needle structure 820, correspondingly, there are two movable second needle support holes provided on the mating surface 11, respectively located on both radial sides of the first needle support hole 12. This specific embodiment does not provide corresponding drawings. The structure of the movable second needle support hole is the same as the structure of the movable second needle support hole 13 described above, and each of the movable second needle support holes is fitted with the elastic clamping assembly 15 described above.

[0047] See Figure 8As shown in the above embodiments, the elastic clamping assembly 15 is a ball screw, including a threaded portion 151 with a nut, a spring 153 disposed in the inner cavity of the threaded portion, and a steel ball 152 that can extend or retract from the port of the inner cavity of the threaded portion; the threaded portion 151 is adjustablely mounted on the inner wall 132 of the movable second pin support hole 13, so that the size of the space for the movable second pin 831 to move radially can be adjusted as a whole; the nut of the threaded portion 151 extends out of the outer periphery of the end of the support member 10, which facilitates the adjustment of the depth of the threaded portion; under the action of the spring 153, the steel ball 152 presses the end of the movable second pin 831 against the inclined surface (i.e., the inner wall 131 of the movable second pin support hole 13).

[0048] See also Figures 5 to 8 As shown in the above embodiments, the support member 10 includes a rotating shaft 16, a limiting flange 17, and an annular end sleeve 18. The limiting flange 17 is fixedly disposed on the front periphery of the rotating shaft 16, and the annular end sleeve 18 is fixedly sleeved on the end periphery of the rotating shaft 16. The first needle support hole 12 is formed by opening axially inward from the end of the rotating shaft 16. The movable second needle support hole 13 is formed by opening radially inward from a predetermined position on the outer periphery of the annular end sleeve 18 and being limited by a limiting plate 19 disposed at the predetermined position. The inner wall of the limiting plate 19 serves as the inner wall (i.e., inner wall 132) of the movable second needle support hole 13 relative to the radially distal end of the first needle support hole 12. In addition, an elastic pressing assembly 15 is disposed on the limiting plate 19.

[0049] Specifically, the portions of the annular end sleeve 18 located on both sides of the predetermined position are flattened and fixedly fitted with limiting plates 19. This structure makes it easier to create the movable second pin support hole 13 and to install the elastic clamping assembly 15.

[0050] As an alternative implementation, the movable second needle support hole is formed by opening the end face of the annular end sleeve 18 inward, and the elastic clamping component 15 is disposed on the wall between the movable second needle support hole and the outer peripheral surface of the annular end sleeve 18.

[0051] See also Figures 5 to 8 As shown, the needle coil support assembly 100 provided in the specific embodiment of the present invention further includes a mounting sleeve 20, a sliding bushing 30, and a return spring 40. The sliding bushing 30 is axially slidably sleeved inside the mounting sleeve 20, and the return spring 40 is provided between the mounting sleeve 20 and the sliding bushing 30. When the rear end of the sliding bushing 30 is subjected to force and slides forward relative to the mounting sleeve 20, the return spring 40 is compressed. When the force at the rear end is removed, the return spring 40 resets the sliding bushing 30 relative to the mounting sleeve 20.

[0052] Meanwhile, the main shaft of the rotating shaft 16 of the support member 10 is rotatably disposed within the sliding sleeve 30. Specifically, the main shaft of the rotating shaft 16 is rotatably disposed within the sliding sleeve 30 via a first bearing 31 and a second bearing 32. Furthermore, the rear end of the limiting flange 17 of the support member 10 abuts against the front end of the sliding sleeve 30, and the root (end) of the main shaft of the rotating shaft 16 is stopped by a locking nut 33 at the rear end of a stop member 34 disposed within the sliding sleeve 30, thereby restricting the axial sliding of the rotating shaft 16 of the support member 10 relative to the sliding sleeve 30.

[0053] See also Figures 5 to 8 As shown, a limiting post 181 is provided on the outer periphery of the annular end sleeve 18, and the mounting seat sleeve 20 has a limiting piece 21 extending toward the annular end sleeve 18, with a limiting groove 211 axially formed on the limiting piece 21. When the support member 10 slides forward relative to the mounting seat sleeve 20 with the sliding bushing 30, the limiting post 181 slides out of the limiting groove 211, allowing the support member 10 to rotate relative to the sliding bushing 30. When the support member 10 returns to its original position relative to the mounting seat sleeve 20 with the sliding bushing 30, the limiting post 181 is embedded in the limiting groove 211.

[0054] Combination Figure 9 and Figure 10 As shown, when the aforementioned needle support assembly 100 is docked with the variable diameter needle assembly 800, the second needle support hole 13 can first provide radial movement space for the end of the movable second needle 831. Moreover, the inclined inner wall 131 of the movable second needle support hole 13 relative to the radially proximal end of the first needle support hole can smoothly adapt to the radial distance adjustment of the movable second needle 831 relative to the first needle structure. Then, using the elastic pressing component 15 provided on the inner wall 132 of the movable second needle support hole 13 relative to the radially distal end of the first needle support hole, the end of the movable second needle 831 is pressed against the inclined inner wall 131. In this way, the needle support assembly 100 can adapt to the radial adjustment of the movable second needle 831 in the variable diameter needle assembly 800, and can also form a stable support for the end of the movable second needle 831, providing support both radially outward and radially inward. This avoids the end of the movable second needle 831 from vibrating during the winding process, achieving stable winding after the needle circumference changes.

[0055] See Figures 5 to 8 As shown, a specific embodiment of the present invention also provides a battery cell winding device, including a variable diameter winding needle assembly 800 and a winding needle support assembly 100. The variable diameter winding needle assembly 800 includes a needle holder 810, a first needle structure 820 and a second needle structure 830. The second needle structure 830 includes at least one movable second needle 831. The winding needle support assembly adopts the winding needle support assembly described above.

[0056] See Figures 5 to 8As shown, a specific embodiment of the present invention also provides a battery cell processing device, including a positive electrode unwinding device, a negative electrode unwinding device, a diaphragm unwinding device, and a battery cell winding device; wherein, the winding needle support assembly adopts the winding needle support assembly described above.

Claims

1. A needle coil support assembly, comprising a support member for supporting the ends of a first needle structure and a second needle structure of a variable diameter needle coil assembly, the second needle structure including at least one movable second needle; a first needle support hole is provided inwardly at the center of the mating surface of the support member; characterized in that: On the mating surface of the support member, at least one movable second needle support hole is provided inward at a radially spaced position relative to the first needle support hole; the movable second needle support hole provides radial movement space for the end of the movable second needle; the inner wall of the movable second needle support hole near the radial end relative to the first needle support hole is set as an inclined surface, and an elastic pressing component is provided on the inner wall of the radially distal end to press the end of the movable second needle against the inclined surface; The support includes a rotating shaft and an annular end sleeve. The annular end sleeve is fixedly sleeved on the periphery of the end of the rotating shaft. The first needle support hole is formed by opening axially inward from the end of the rotating shaft. The movable second needle support hole is formed by opening inward from the end face of the annular end sleeve. The elastic clamping component is disposed on the wall between the movable second needle support hole and the outer peripheral surface of the annular end sleeve.

2. The needle coil support assembly according to claim 1, characterized in that: The elastic clamping assembly is a ball screw, the threaded portion of which is adjustablely mounted on the inner wall of the radially distal end. Under the action of the spring in the ball screw, the steel ball of the ball screw presses the end of the movable second pin against the inclined surface.

3. The needle coil support assembly according to claim 1, characterized in that: The movable second needle support hole is formed by radially opening inward from a predetermined position on the outer periphery of the annular end sleeve and being limited by a limiting plate set at the predetermined position. The inner wall of the limiting plate serves as the inner wall of the movable second needle support hole at the radially distal end relative to the first needle support hole. The elastic clamping assembly is disposed on the limiting plate.

4. The needle coil support assembly according to claim 3, characterized in that: The portion of the annular end sleeve located on both sides of the predetermined position is flattened and the limiting plate is fixedly installed.

5. The needle coil support assembly according to any one of claims 1-4, characterized in that: The second needle structure includes two movable second needles, which are located on the radial sides of the first needle structure respectively; there are two movable second needle support holes, which are respectively located on the radial sides of the first needle support hole; each movable second needle support hole is fitted with the elastic clamping component.

6. The needle coil support assembly according to any one of claims 1-4, characterized in that: The second needle structure includes a fixed second needle and a movable second needle, which are located on the radial sides of the first needle structure, respectively; on the mating surface of the support member, a fixed second needle support hole and a movable second needle support hole are respectively opened at a distance from the radial sides of the first needle support hole; the fixed second needle support hole is used for the end of the fixed second needle to be inserted and fixedly confined therein.

7. The needle coil support assembly according to claim 1, characterized in that: It also includes a mounting seat and a sliding bushing, wherein the sliding bushing is axially slidably fitted inside the mounting seat, and the main shaft and root of the rotating shaft of the support member are rotatably and axially restricted to sliding within the sliding bushing.

8. The needle coil support assembly according to claim 7, characterized in that: A limiting post is provided on the outer periphery of the annular end sleeve, and the mounting seat sleeve has a limiting piece extending toward the annular end sleeve, with a limiting groove axially formed on the limiting piece; when the support member slides forward relative to the mounting seat sleeve with the sliding bushing, the limiting post slides out of the limiting groove, allowing the support member to rotate relative to the sliding bushing; when the support member returns to its original position relative to the mounting seat sleeve with the sliding bushing, the limiting post is embedded in the limiting groove.

9. A battery cell winding device, comprising a variable diameter winding needle assembly and a winding needle support assembly, wherein the variable diameter winding needle assembly includes a needle holder, a first needle structure, and a second needle structure, the second needle structure including at least one movable second needle; characterized in that, The needle coil support assembly is the needle coil support assembly according to any one of claims 1-8.

10. A battery cell processing device, comprising a positive electrode unwinding device, a negative electrode unwinding device, a separator unwinding device, and a battery cell winding device; wherein the battery cell winding device is the battery cell winding device according to claim 9.

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