A winding device for lithium battery copper foil

Abstract

The utility model provides a kind of winding device for lithium battery copper foil belongs to lithium battery production equipment technical field, the winding device for lithium battery copper foil, including fixed base, the top of fixed base is fixedly connected with two first connecting plates, two first connecting plates are rotatably connected with winding device, the side end of two first connecting plates is fixedly connected with second connecting plate, the top of two second connecting plates is fixedly connected with limit sleeve, when needing to further adjust tension, start second motor drive second screw rod rotation, drive second moving plate to move up and down in limit groove, exert force to copper foil by connecting rod and adjust tension, realize the accurate adjustment of copper foil tension, ensure that copper foil is tightly and neatly wound, avoid problems such as relaxation, wrinkle or breakage, improve copper foil winding quality and efficiency, and then improve the energy density of lithium battery, reduce the risk of copper foil falling off or breaking during subsequent processing and use, protect the performance and service life of lithium battery.

Description

Technical Field

[0001] This utility model belongs to the technical field of lithium battery production equipment, specifically relating to a winding device for lithium battery copper foil. Background Technology

[0002] In the production process of lithium batteries, the copper foil used as the negative electrode current collector directly affects the performance and safety of the lithium battery. Traditional winding equipment for lithium battery copper foil has revealed many problems in practical applications.

[0003] With the rapid growth in demand for lithium batteries, the requirements for the efficiency and quality of copper foil winding are constantly increasing. Existing winding devices are prone to uneven tension on the copper foil during the winding process. When the tension of the copper foil is unstable during winding, it results in the copper foil not being tightly wound on the core, with gaps between layers. This not only affects the energy density of the battery but may also cause the copper foil to fall off or break during subsequent processing and use, thus affecting the overall performance and lifespan of the lithium battery.

[0004] Authorized publication number "CN220041908U" describes lithium battery negative electrode sheets, lithium battery winding products, and cylindrical lithium batteries. The lithium battery winding product includes a layered assembly composed of an inner positive electrode sheet, an intermediate separator, and a negative electrode sheet, which are wound into a cylindrical winding body. The negative electrode sheet includes a lithium foil of equal width and a metal foil of the same width. The metal foil and the lithium foil are stacked side by side to form a long strip. The metal foil is located at the end of the negative electrode sheet and forms the outermost ring of the cylindrical winding body. Negative electrode tabs are welded on the metal foil, with the end of the negative electrode tabs away from the cylindrical winding body extending outward. The outermost ring is set as a non-reactive metal foil to avoid waste of lithium metal, reduce raw material costs, improve the utilization rate of the negative electrode, and make lithium batteries more economical and environmentally friendly.

[0005] The aforementioned patent involves welding a negative electrode tab onto a metal foil, with the end of the negative electrode tab extending outwards away from the cylindrical winding body. The outermost ring is set as a non-reactive metal foil, avoiding the waste of lithium metal, reducing raw material costs, and improving the utilization rate of the negative electrode, making lithium batteries more economical and environmentally friendly. However, the aforementioned patent has certain limitations in its use. During the winding process, the tension of the copper foil is extremely unstable, causing it to wrap loosely on the core, with large gaps between layers. This not only reduces the energy density of the battery but also easily leads to copper foil falling off or breaking during subsequent processing and use, seriously affecting the performance and lifespan of the lithium battery. In addition, the device lacks a limiting function for the winding equipment, and the copper foil is prone to loosening after winding is completed. Utility Model Content

[0006] The purpose of this invention is to provide a winding device for lithium battery copper foil, which aims to solve the problem that the copper foil tension is extremely unstable during the winding process in the prior art, resulting in loose winding on the core and large gaps between layers. This not only reduces the energy density of the battery, but also easily causes the copper foil to fall off or break during subsequent processing and use, seriously affecting the performance and service life of the lithium battery. In addition, the device lacks the function of limiting the winding equipment, and the copper foil is prone to loosening after winding is completed.

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] A winding device for lithium battery copper foil, comprising:

[0009] A fixed base, wherein two first connecting plates are fixedly connected to the top of the fixed base, a winding device is rotatably connected inside the two first connecting plates, a second connecting plate is fixedly connected to one side of each of the two first connecting plates, and a limit sleeve is fixedly connected to the top of the two second connecting plates; and

[0010] The first lead screw is rotatably connected to two second connecting plates. One side of one of the second connecting plates is fixedly connected to a first motor, and the output end of the first motor is fixedly connected to one end of the first lead screw.

[0011] The first movable plate, there are two first movable plates, and both first movable plates are disposed between two second connecting plates;

[0012] An adjustment mechanism is provided inside the first connecting plate, and the adjustment mechanism is used to adjust the tension of the copper foil.

[0013] As a preferred embodiment of this utility model, the adjusting mechanism includes:

[0014] The first nut, there are two first nuts, both of which are sleeved on the outer surface of the two first lead screws, and the two first nuts are respectively fixedly connected to the two first movable plates;

[0015] The photoelectric sensor is provided in two parts, and the two photoelectric sensors are respectively fixedly connected to the close ends of the two first movable plates;

[0016] The limiting groove is provided in two places, and the two limiting grooves are respectively opened at the close ends of the two second connecting plates;

[0017] The second lead screw is rotatably connected to the upper and lower inner walls of one of the limiting grooves;

[0018] The second motor is fixedly connected to the bottom end of one of the second connecting plates;

[0019] A limiting rod, which is fixedly connected to the bottom end of another limiting groove;

[0020] The second movable plate is provided in two parts, and the two second movable plates are slidably connected in two limiting grooves respectively;

[0021] The second nut is fixedly connected inside one of the second movable plates and is threaded to the circumferential surface of the second lead screw;

[0022] A connecting rod, which is fixedly connected to the adjacent ends of the two second movable plates;

[0023] The limiting components are provided in two sets, which are respectively located on both sides of the two first connecting plates. The two sets of limiting components are used to limit the two parts of the winding device.

[0024] In a preferred embodiment of this utility model, one set of the limiting components includes:

[0025] A rotating rod, which is fixedly connected to one side of the winding device;

[0026] A ratchet, which is fixedly connected to the circumferential surface of the rotating rod;

[0027] A positioning seat, which is fixedly connected to one side of the first connecting plate;

[0028] A ratchet tooth, which is rotatably connected to one side of the positioning seat;

[0029] A spring, which is fixedly connected to the adjacent ends of the ratchet and the positioning seat;

[0030] A positioning rod is fixedly connected to one side of the positioning seat.

[0031] In a preferred embodiment of this utility model, the top ends of the two second connecting plates are fixedly connected to limit sleeves, and the two first movable plates are slidably connected within the limit sleeves.

[0032] As a preferred embodiment of this utility model, photoelectric sensors are fixedly connected to the adjacent ends of the two first movable plates, and tension sensors are fixedly connected to the circumferential surface of the connecting rod.

[0033] As a preferred embodiment of this utility model, a plastic sleeve is fixedly connected to the outer surface of the fixing base.

[0034] As a preferred embodiment of this utility model, protective baffles are fixedly connected to the circumferential surfaces of the winding ends of the two winding devices.

[0035] Compared with the prior art, the beneficial effects of this utility model are:

[0036] 1. In this solution, the device is equipped with an adjustment mechanism, including a first lead screw, a first nut, a first moving plate, a second lead screw, a second nut, a second moving plate, a connecting rod, a photoelectric sensor, and a tension sensor. The first motor drives the first lead screw to rotate, which in turn moves the first moving plate, allowing for initial adjustment of the winding device components. The photoelectric sensor monitors the position and state of the copper foil in real time, and the tension sensor detects the tension of the copper foil. When further tension adjustment is needed, the second motor is activated to drive the second lead screw to rotate, which in turn moves the second moving plate up and down within the limiting groove. The connecting rod applies force to the copper foil to adjust the tension, achieving precise adjustment of the copper foil tension. This ensures that the copper foil is wound tightly and neatly, avoiding problems such as looseness, wrinkles, or breakage, thus improving the quality and efficiency of copper foil winding, thereby increasing the energy density of the lithium battery, reducing the risk of copper foil falling off or breaking during subsequent processing and use, and ensuring the performance and service life of the lithium battery.

[0037] 2. In this solution, two sets of limiting components are set. Each set of limiting components includes a rotating rod, a ratchet, a positioning seat, a ratchet tooth, a spring, and a positioning rod. The rotating rod is fixed to one end of the winding device, the ratchet is fixed to the circumferential surface of the rotating rod, and the ratchet tooth is rotatably connected to one end of the positioning seat. The spring keeps the ratchet tooth in contact with the ratchet, and the positioning rod limits the rotation range of the ratchet tooth. During the copper foil winding process, when winding in the forward direction, the ratchet tooth slides between the ratchet teeth without hindering the rotation. When the winding device tends to rotate in the reverse direction, the ratchet tooth is locked by the spring force, and the positioning rod ensures that the ratchet tooth works normally, effectively limiting the reverse rotation of the winding device, preventing the copper foil from loosening, ensuring the stability and neatness of the copper foil winding, and reducing the risks in the lithium battery production process. Attached Figure Description

[0038] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0039] Figure 1 This is a perspective view of the present utility model;

[0040] Figure 2 This is a first-view sectional perspective view of the present invention;

[0041] Figure 3 In this utility model Figure 2 A magnified view of part A;

[0042] Figure 4 This is a first-person side view of the present invention.

[0043] Figure 5 In this utility model Figure 4 A magnified view of section B.

[0044] In the diagram: 1. First connecting plate; 2. Ratchet; 3. Positioning seat; 4. Rotating rod; 5. Protective baffle; 6. Winding device; 7. Second connecting plate; 8. Limiting sleeve; 9. First motor; 10. Second motor; 11. First lead screw; 12. Limiting groove; 13. First nut; 14. First moving plate; 15. Photoelectric sensor; 16. Plastic sleeve; 17. Second lead screw; 18. Spring; 19. Connecting rod; 20. Tension sensor; 21. Second moving plate; 22. Second nut; 23. Positioning rod; 24. Ratchet; 25. Fixed seat. Detailed Implementation

[0045] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0046] Example 1

[0047] Please see Figures 1-5 The present invention provides the following technical solution:

[0048] A winding device for lithium battery copper foil, comprising:

[0049] A fixed base 25 has two first connecting plates 1 fixedly connected to its top end. A winding device 6 is rotatably connected within each of the two first connecting plates 1. A second connecting plate 7 is fixedly connected to one side end of each of the two first connecting plates 1. A limit sleeve 8 is fixedly connected to the top end of each of the two second connecting plates 7.

[0050] The first lead screw 11 is rotatably connected to two second connecting plates 7. One side of one of the second connecting plates 7 is fixedly connected to a first motor 9, and the output end of the first motor 9 is fixedly connected to one end of the first lead screw 11.

[0051] Two first movable plates 14 are provided, and both first movable plates 14 are disposed between two second connecting plates 7;

[0052] An adjustment mechanism is located inside the first connecting plate 1 and is used to adjust the tension of the copper foil.

[0053] In a specific embodiment of this utility model, the fixed base 25 serves as the basic support component of the entire winding device, providing a stable mounting platform for other components of the device, ensuring that the device remains stable during operation, and reducing the adverse effects on the winding process caused by shaking or displacement.

[0054] The first connecting plate 1 is fixedly connected to the top of the fixed base 25, serving as a bridge connecting the fixed base 25 and the winding device 6.

[0055] The winding device 6 is provided with a rotational support, which allows the winding device 6 to rotate freely between the two first connecting plates 1 to realize the winding operation of copper foil.

[0056] Provides installation space for the adjustment mechanism, facilitating its adjustment of the copper foil tension.

[0057] The winding device 6 is one of the core components of the winding device. By rotating within the two first connecting plates 1, the lithium battery copper foil is wound and collected, realizing the orderly storage of the copper foil, which facilitates subsequent storage, transportation and use.

[0058] The second connecting plate 7 is fixedly connected to one side of the two first connecting plates 1, and serves to connect the first connecting plate 1 with components such as the limiting sleeve 8 and the first lead screw 11.

[0059] It provides support for the limiting sleeve 8, ensuring the stability of the position of the limiting sleeve 8 and playing a limiting role in the winding of the copper foil.

[0060] Provide rotational support for the first lead screw 11, so that the first lead screw 11 can rotate smoothly within the two second connecting plates 7.

[0061] The limiting sleeve 8 is fixedly connected to the top of the two second connecting plates 7. During the copper foil winding process, it restricts the position of the copper foil to prevent the copper foil from shifting or shaking during the winding process, and ensures the neatness and tightness of the copper foil winding.

[0062] The first lead screw 11 is rotatably connected to the two second connecting plates 7. When the first motor 9 drives it to rotate, the first lead screw 11 will drive the first moving plate 14 that cooperates with it to move, thereby realizing the adjustment of the position of certain components of the winding device, which may be used to adjust the width or position of the copper foil winding, etc.

[0063] The first motor 9 is fixedly connected to one side of one of the second connecting plates 7, and its output end is fixedly connected to one end of the first lead screw 11. The first motor 9 provides power for the rotation of the first lead screw 11. By controlling the rotation direction and speed of the first motor 9, the rotation of the first lead screw 11 can be precisely controlled, thereby achieving precise control of the movement of the first moving plate 14.

[0064] Two first movable plates 14 are disposed between two second connecting plates 7 and cooperate with the first lead screw 11. When the first lead screw 11 rotates, the first movable plates 14 will move under the drive of the lead screw, which may be used to adjust the position of certain components of the winding device to adapt to the winding requirements of copper foil of different specifications, or to fine-tune the position of the copper foil during the winding process.

[0065] The adjustment mechanism is located within the first connecting plate 1, and its main function is to adjust the tension of the copper foil during the winding process. Appropriate tension during copper foil winding ensures the tightness and neatness of the winding, preventing problems such as looseness, wrinkles, or breakage, thus improving the quality and efficiency of copper foil winding.

[0066] It should be noted that the specific models of the first motor 9, the second motor 10, the photoelectric sensor 15, and the tension sensor 20 used shall be selected by those skilled in the art. Furthermore, the first motor 9, the second motor 10, the photoelectric sensor 15, and the tension sensor 20 mentioned above are all existing technologies and will not be elaborated upon in this solution.

[0067] Please refer to the details. Figures 1-5 The regulating mechanism includes:

[0068] Two first nuts 13 are provided, and the two first nuts 13 are sleeved on the outer surface of the two first lead screws 11. The two first nuts 13 are respectively fixedly connected to the two first moving plates 14.

[0069] Two photoelectric sensors 15 are provided, and the two photoelectric sensors 15 are respectively fixedly connected to the close ends of the two first moving plates 14.

[0070] There are two limiting grooves 12, which are respectively opened at the close ends of the two second connecting plates 7.

[0071] The second lead screw 17 is rotatably connected to the upper and lower inner walls of one of the limiting grooves 12;

[0072] The second motor 10 is fixedly connected to the bottom end of one of the second connecting plates 7;

[0073] A limiting rod is fixedly connected to the bottom end of another limiting groove 12;

[0074] Two second movable plates 21 are provided, and the two second movable plates 21 are slidably connected to the two limiting grooves 12 respectively.

[0075] The second nut 22 is fixedly connected inside one of the second movable plates 21, and the second nut 22 is threadedly connected to the circumferential surface of the second lead screw 17;

[0076] Connecting rod 19 is fixedly connected to the adjacent ends of the two second movable plates 21;

[0077] The limiting components are provided in two sets, which are respectively located on both sides of the two first connecting plates 1. The two sets of limiting components are used to limit the two parts of the winding device 6.

[0078] In this embodiment: when it is necessary to adjust the winding process of the lithium battery copper foil, the first motor 9 is started first, driving the first lead screw 11 to rotate. Since the first nut 13 is threadedly engaged with the first lead screw 11 and fixed inside the first moving plate 14, the rotation of the first lead screw 11 will drive the first moving plate 14 to move along the lead screw direction. During the movement of the first moving plate 14, the photoelectric sensor 15 on it monitors the position and status information of the copper foil in real time and feeds the signal back to the control system.

[0079] If further adjustment of the copper foil tension is required, the second motor 10 is activated. The second motor 10 drives the second lead screw 17 to rotate. The second lead screw 17 engages with the second nut 22, causing the second moving plate 21 to move up and down within the limiting groove 12. Since the connecting rod 19 connects the two second moving plates 21, the movement of the second moving plates 21 applies a certain force to the copper foil through the connecting rod 19, thereby achieving adjustment of the copper foil tension.

[0080] Meanwhile, the limiting component constantly limits the winding device 6, ensuring that it maintains a stable position during the winding process and guaranteeing the quality and stability of the copper foil winding. The entire adjustment process, through the coordinated work of all components, achieves precise adjustment of the position and tension during the lithium-ion battery copper foil winding process.

[0081] Please refer to the details. Figures 1-3 One set of limiting components includes:

[0082] Rotating rod 4 is fixedly connected to one side of winding device 6;

[0083] Ratchet 2 is fixedly connected to the circumferential surface of the rotating rod 4;

[0084] Positioning seat 3 is fixedly connected to one side of the first connecting plate 1;

[0085] Ratchet 24 is rotatably connected to one side of the positioning seat 3;

[0086] Spring 18 is fixedly connected to the adjacent ends of ratchet 24 and positioning seat 3;

[0087] Positioning rod 23 is fixedly connected to one side of positioning seat 3.

[0088] In this embodiment: During the winding process of the lithium battery copper foil, the winding device 6 begins to wind the copper foil in the forward direction. At this time, the rotating rod 4 rotates in the forward direction along with the winding device 6, causing the ratchet 2 fixed on its circumferential surface to also rotate in the forward direction. Due to the action of the spring 18, the ratchet 24 remains in contact with the teeth of the ratchet 2. However, when the ratchet 2 rotates in the forward direction, the ratchet 24 will slide between the teeth of the ratchet 2 and will not hinder the rotation of the ratchet 2. Therefore, the winding device 6 can smoothly perform forward winding.

[0089] When the winding device 6 tends to rotate in the opposite direction due to some reason, such as external force or system failure, the ratchet 2 will also tend to rotate in the opposite direction. At this time, under the elastic force of the spring 18, the ratchet 24 will quickly lock onto the teeth of the ratchet 2, preventing the ratchet 2 from rotating in the opposite direction, thereby limiting the reverse rotation of the winding device 6. The positioning rod 23 ensures that the ratchet 24 will not rotate excessively during operation, so that it can always accurately engage with the ratchet 2, realizing a reliable one-way limiting function and ensuring the stability and neatness of the copper foil during the winding process.

[0090] Please refer to the details. Figure 2 The top ends of the two second connecting plates 7 are fixedly connected to the limiting sleeves 8, and the two first moving plates 14 are slidably connected inside the limiting sleeves 8.

[0091] In this embodiment, the limiting sleeves 8 fixed to the top of the two second connecting plates 7 provide a precise sliding track for the two first moving plates 14. When the first lead screw 11 rotates under the drive of the first motor 9, driving the first nut 13 and the first moving plate 14 connected thereto to move, the limiting sleeves 8 ensure that the first moving plate 14 can only slide smoothly along a specific direction.

[0092] Please refer to the details. Figures 1-5 Photoelectric sensors 15 are fixedly connected to the close ends of the two first moving plates 14, and tension sensors 20 are fixedly connected to the circumferential surface of the connecting rod 19.

[0093] In this embodiment, photoelectric sensors 15 fixed at the near ends of the two first moving plates 14 are mainly responsible for real-time monitoring of the position and running status of the copper foil during the winding process. When abnormalities such as positional deviation occur in the copper foil, the photoelectric sensors 15 can quickly capture the signal and feed it back to the control system. Meanwhile, the tension sensor 20 fixed on the circumferential surface of the connecting rod 19 focuses on detecting the current tension on the copper foil. The two sensors work together to provide comprehensive data support for the system's precise control of the copper foil winding process.

[0094] Please refer to the details. Figures 1-3 A plastic sleeve 16 is fixedly connected to the outer surface of the fixing base 25.

[0095] In this embodiment, the plastic sleeve 16 fixed to the outer surface of the mounting base 25 plays multiple roles during the operation of the entire device. On the one hand, the plastic sleeve 16 has good insulation properties, which can effectively prevent leakage that may occur during electrical connection or operation of the device, ensuring the personal safety of operators and the normal operation of electrical components inside the device.

[0096] Please refer to the details. Figures 1-5 Protective baffles 5 are fixedly connected to the circumferential surfaces of the winding ends of the two winding devices 6.

[0097] In this embodiment, the protective baffles 5 fixed to the circumferential surfaces of the winding ends of the two winding devices 6 are mainly used to provide safety protection during the copper foil winding process. During the winding operation, the copper foil is wound at high speed onto the winding device 6. Without protective measures, if the copper foil breaks or splashes, it may cause injury to the operator or damage the surrounding equipment.

[0098] The working principle and usage process of this utility model are as follows: After the winding device is turned on, the first motor 9 drives the first lead screw 11 to rotate, which in turn drives the first moving plate 14, connected to it by the first nut 13, to move smoothly under the guidance of the limiting sleeve 8, initially adjusting the position of the winding device components to meet the copper foil winding requirements. During the winding process, the photoelectric sensor 15 on the first moving plate 14 monitors the position and running status of the copper foil in real time, and the tension sensor 20 on the connecting rod 19 detects the tension of the copper foil. Once an abnormality occurs, the sensor feeds back the signal to the control system. If tension adjustment is required, the second motor 10 is started, which drives the second lead screw 17 to rotate, which drives the second moving plate 21 to move up and down in the limiting groove 12 through the second nut 22, and then applies a force to the copper foil through the connecting rod 19 to adjust the tension. Meanwhile, the limiting component limits the winding device 6. When winding in the forward direction, the ratchet 2 drives the ratchet 24 to slide. When the reverse rotation trend appears, the ratchet 24 is locked by the spring 18. The positioning rod 23 ensures that the ratchet 24 works normally, prevents the winding device 6 from rotating in the reverse direction, avoids the copper foil from loosening, ensures that the copper foil is wound tightly and neatly, and improves the production quality of lithium batteries.

[0099] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A winding device for lithium battery copper foil, characterized in that, include: A fixed base (25) is provided, the top of which is fixedly connected to two first connecting plates (1). A winding device (6) is rotatably connected within each of the two first connecting plates (1). A second connecting plate (7) is fixedly connected to one side of each of the two first connecting plates (1). A limit sleeve (8) is fixedly connected to the top of each of the two second connecting plates (7). The first lead screw (11) is rotatably connected to two second connecting plates (7). One side of one of the second connecting plates (7) is fixedly connected to a first motor (9). The output end of the first motor (9) is fixedly connected to one end of the first lead screw (11). The first movable plate (14) is provided in two, and the two first movable plates (14) are both provided between the two second connecting plates (7); An adjustment mechanism is provided inside the first connecting plate (1) and is used to adjust the tension of the copper foil.

2. The winding device for lithium battery copper foil according to claim 1, characterized in that: The adjustment mechanism includes: The first nut (13) is provided in two parts. The two first nuts (13) are sleeved on the outer surface of the two first lead screws (11) and the two first nuts (13) are respectively fixedly connected to the two first moving plates (14). Two photoelectric sensors (15) are provided, and the two photoelectric sensors (15) are respectively fixedly connected to the close ends of the two first moving plates (14); Two limiting grooves (12) are provided, and the two limiting grooves (12) are respectively opened at the close ends of the two second connecting plates (7); The second lead screw (17) is rotatably connected to the upper and lower inner walls of one of the limiting grooves (12); The second motor (10) is fixedly connected to the bottom end of one of the second connecting plates (7); A limiting rod, which is fixedly connected to the bottom end of another limiting groove (12); The second movable plate (21) is provided in two parts, and the two second movable plates (21) are slidably connected in two limiting grooves (12); The second nut (22) is fixedly connected to one of the second movable plates (21) and threadedly connected to the circumferential surface of the second lead screw (17); A connecting rod (19) is fixedly connected to the adjacent ends of two second movable plates (21); The limiting components are provided in two sets, which are respectively located on both sides of the two first connecting plates (1) and are used to limit the two parts of the winding device (6).

3. The winding device for lithium battery copper foil according to claim 2, characterized in that: One set of the limiting components includes: Rotating rod (4), the rotating rod (4) is fixedly connected to one side end of the winding device (6); Ratchet (2), which is fixedly connected to the circumferential surface of the rotating rod (4); Positioning seat (3), which is fixedly connected to one side of the first connecting plate (1); A ratchet (24) is rotatably connected to one side of the positioning seat (3); A spring (18) is fixedly connected to the adjacent ends of the ratchet (24) and the positioning seat (3); Positioning rod (23), which is fixedly connected to one side of positioning seat (3).

4. The winding device for lithium battery copper foil according to claim 3, characterized in that: The top ends of the two second connecting plates (7) are fixedly connected to the limiting sleeves (8), and the two first moving plates (14) are slidably connected inside the limiting sleeves (8).

5. The winding device for lithium battery copper foil according to claim 4, characterized in that: Photoelectric sensors (15) are fixedly connected to the close ends of the two first moving plates (14), and tension sensors (20) are fixedly connected to the circumferential surface of the connecting rod (19).

6. The winding device for lithium battery copper foil according to claim 5, characterized in that: A plastic sleeve (16) is fixedly connected to the outer surface of the fixing base (25).

7. A winding device for lithium battery copper foil according to claim 6, characterized in that: Protective baffles (5) are fixedly connected to the circumferential surfaces of the winding ends of the two winding devices (6).

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