A wide lithium battery copper foil slitting and winding device

Abstract

The utility model discloses a kind of large width lithium battery copper foil slitting and winding device, it includes slitting machine wallboard, upper winding device and lower winding device. By moving 210mm left to upper winding device motor drive end, moving 210mm right to lower winding device motor drive end, and adjusting transmission gear shaft spacing and speed reducer position, realize the space separation of upper and lower winding, while custom-made lengthened air inflation shaft to meet the winding demand of 1800mm width copper foil. The application can efficiently complete the upper and lower winding of large width lithium battery copper foil while slitting and winding, significantly improve equipment utilization and production efficiency, reduce transformation cost, provide technical support for lithium battery material processing.

Description

Technical Field

[0001] This utility model relates to the technical field of lithium battery material processing equipment, and in particular to a wide-width lithium battery copper foil slitting and winding device. Background Technology

[0002] With the rapid development of the lithium battery industry, the demand for lithium-ion battery copper foil, the negative electrode current collector, is increasing, and its width is gradually increasing. Currently, the width of the winding core FRP tube of lithium-ion battery copper foil has reached about 1800mm, and the width of the slitting master roll of lithium-ion battery copper foil can reach 1680mm to meet customer demand for 724mm*2 roll finished products. However, the winding width of the wall plate of existing slitting machines is usually 2030mm, which cannot achieve the function of simultaneously centering the winding of the 1800mm wide core. As a result, many mainstream slitting machines with a width of 1680mm and below have been discontinued or phased out due to insufficient width. In the prior art, CN209210036U discloses a slitting mechanism and slitting machine, which converts rotary motion into reciprocating linear motion through the cooperation of a worm gear and a worm, thereby driving the slitting roller to adjust and solving the problem of the slitting mechanism being unadjustable; CN110422680B discloses a slitting machine including a wall plate, a feeding mechanism, a correction mechanism, a tension mechanism, a slitting mechanism, and multiple winding mechanisms, which can realize the slitting and stable winding of wide strips. However, these prior technologies still have significant defects, especially in meeting the slitting requirements of wide lithium battery copper foil. Specifically, the equipment structure design limits the expansion capability of the slitting width and fails to achieve the function of simultaneous winding of upper and lower rolls. Therefore, how to improve the winding device of the slitting machine based on the existing equipment to adapt to the slitting requirements of wide lithium battery copper foil has become an urgent technical problem to be solved. This utility model aims to optimize the design of the winding device of the slitting machine to achieve simultaneous top and bottom centering winding of 1800mm wide tube cores, making full use of existing equipment resources, reducing R&D costs and cycle, and providing an innovative solution for industry development. Utility Model Content

[0003] The purpose of this utility model is to provide a wide lithium battery copper foil slitting and winding device, which solves the problems mentioned in the background art.

[0004] This invention is implemented as follows: a wide-width lithium battery copper foil slitting and winding device includes a slitting machine wall plate, an upper winding device, and a lower winding device. The motor drive end of the upper winding device is shifted 210mm to the left, and the motor drive end of the lower winding device is shifted 210mm to the right. This staggered arrangement spatially separates the upper and lower winding devices, thus avoiding interference problems caused by insufficient width.

[0005] Furthermore, to accommodate the aforementioned staggered arrangement, the spacing between the transmission gear shafts on the wall panel side was increased, and the geared motor was moved rearward by extending the support bracket of the transmission geared motor. This design not only ensures the stability of the transmission system but also provides sufficient space for the installation of the synchronous belt. The synchronous belt is used to drive the transmission gear shaft, and its material selection must possess high tensile strength and wear resistance to ensure reliability during long-term use.

[0006] Specifically, to meet the winding requirements of wide lithium-ion battery copper foil, this invention features two extended air shafts, which are installed on the original bearing housing. The length of the extended air shafts is precisely calculated based on actual production needs, and their surfaces undergo special treatment to increase the coefficient of friction, thereby preventing slippage of the copper foil during winding. Furthermore, the expansion mechanism of the air shafts employs a double-sleeve design, with evenly distributed elastic elements between the inner and outer sleeves. When air pressure is applied, the outer sleeve expands evenly and clamps the core, ensuring the stability of the winding process.

[0007] Furthermore, this invention optimizes the structure of the upper and lower winding devices, arranging them in a staggered manner to achieve simultaneous winding of the upper and lower rolls. Specifically, the upper winding roller is staggered 350mm to the left through the wall plate, and the lower winding roller is staggered 350mm to the right through the wall plate. This design not only solves the problem of insufficient width but also improves the overall compactness of the equipment through reasonable space utilization. The slitting machine wall plate has a width of 2030mm, a dimension rigorously calculated to ensure simultaneous centered winding of 1800mm wide lithium-ion battery copper foil while minimizing modification costs.

[0008] This invention also includes multiple functional components to improve the quality and efficiency of slitting and winding. The proximity roller automatically senses the slitting and winding size and maintains a constant gap by adjusting the distance from the roller surface. The proximity roller is designed based on the principle of photoelectric sensors, with a detection accuracy of ±0.1mm, thus enabling real-time monitoring of the winding diameter. The lower winding roller is suitable for centering the slitting of wide cores and copper foils. Its surface is coated with an anti-static coating to reduce the accumulation of static electricity generated by the copper foil during high-speed operation. The upper and lower slitting and winding pressure rollers are used to flatten the foil surface and remove soft wrinkles. Their pressure is adjustable from 0.5N to 5N, which can be flexibly adjusted according to different copper foil materials. The extended bearing seat of the winding roller is used for the loading and unloading sliding of the roller. It has a self-lubricating bearing inside, significantly reducing the labor intensity of the operator. The edge material winding shaft is used to collect edge material, and its rotation speed is synchronized with the main winding shaft, avoiding edge material accumulation or breakage.

[0009] The technical advantages of this invention are mainly reflected in the following aspects: First, by adjusting the position of the winding device and optimizing the transmission system, simultaneous slitting and winding of wide lithium-ion battery copper foil from top to bottom is achieved, significantly improving production efficiency. Second, the device makes full use of existing slitting machine wall panels and equipment, eliminating the need to develop a new wide-width slitting machine, thus greatly reducing equipment modification costs and time. Third, the improvement of the transmission system enhances the precision of the electronic control configuration, resulting in a significant improvement in both the efficiency of slitting finished products and the operating precision of the slitting machine. Finally, this invention solves the problem of existing slitting machines being phased out due to insufficient width, extending equipment lifespan and improving resource utilization.

[0010] In particular, this invention is highly operable in its implementation. For example, the increase in the transmission gear shaft spacing and the relocation of the geared motor are both modifications based on the existing equipment structure, eliminating the need for additional large-scale processing equipment. The selection of the synchronous belt also fully considers common specifications on the market, facilitating procurement and replacement. Furthermore, the customized solution for the extended air shaft incorporates a standardized production process, ensuring product quality while shortening the delivery cycle.

[0011] In summary, this utility model, through a series of technological innovations and structural optimizations, successfully solves the technical problem that existing slitting machines cannot meet the demand for slitting and winding of wide lithium battery copper foil due to insufficient width. The proposed solution not only represents a significant technological advancement but also demonstrates excellent economic benefits and environmental performance, providing new technical support for the development of the lithium battery material processing field. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of a wide-format lithium battery copper foil slitting and winding device.

[0013] Figure label:

[0014] 9. Approach roller; 10. Lower take-up roller; 11. Upper slitting and take-up pressure roller; 12. Lower slitting and take-up pressure roller; 13. Extended bearing seat for take-up roller; 14. Edge take-up shaft. Detailed Implementation

[0015] This invention provides a wide-width lithium-ion battery copper foil slitting and winding device. Its core lies in optimizing and modifying the structure of existing slitting machines to enable simultaneous slitting and winding of 1800mm wide lithium-ion battery copper foil from both the top and bottom. The specific embodiments of this invention are described in detail below with reference to the accompanying drawings and specific examples.

[0016] like Figure 1As shown, the overall structure of this utility model includes a slitting machine wall panel, an upper winding device, and a lower winding device. The slitting machine wall panel forms the basic frame of the equipment, with a width of 2030mm. This dimension has been rigorously calculated to ensure simultaneous centered winding of 1800mm wide lithium-ion battery copper foil from both the upper and lower sections while minimizing modification costs. To achieve the above functions, the positions of the upper and lower winding devices have been staggered, and the transmission system has been optimized. Specifically, the motor drive end of the upper winding device is shifted 210mm to the left, and the motor drive end of the lower winding device is shifted 210mm to the right. This staggered arrangement spatially separates the upper and lower winding devices, thus avoiding interference problems caused by insufficient width.

[0017] To accommodate the aforementioned misaligned arrangement, the spacing between the transmission gear shafts on the wall panel side was increased, and the geared motor was moved backward using an extended support bracket. In practice, the original transmission system's synchronous belt and related components were first removed, and then the extended transmission gear shafts were reinstalled according to the new design requirements. The length of the transmission gear shafts needed to meet the distance requirements after the misalignment of the upper and lower winding devices, and high-strength alloy steel was selected to ensure long-term stability. Furthermore, the support bracket for the geared motor was custom-made, with its length increased by 150mm to accommodate the rearward movement of the geared motor. The support bracket has internal reinforcing ribs that effectively disperse vibrations generated during motor operation, thereby improving the overall system stability.

[0018] Synchronous belts are used to drive the transmission gear shaft. Their selection should fully consider commonly available specifications for ease of purchase and replacement. The synchronous belts are made of high-tensile-strength and wear-resistant polyurethane, with an embedded steel wire reinforcement layer to enhance load-bearing capacity. During installation, it is crucial to ensure the synchronous belt tension is appropriate. Excessive tension may cause the belt to break, while insufficient tension will affect transmission efficiency. Therefore, this invention features an adjustable tensioning pulley on the side of the wall panel. Operators can adjust the tension of the synchronous belt by rotating the adjusting bolt on the tensioning pulley, thereby ensuring the smooth operation of the transmission system.

[0019] To meet the winding requirements of wide lithium-ion battery copper foil, this invention features two extended air shafts, which are installed on the original bearing housing. The length of the extended air shafts is precisely calculated based on actual production needs, and their surfaces undergo special treatment to increase the coefficient of friction and prevent slippage of the copper foil during winding. The expansion mechanism of the air shafts employs a double-sleeve design, with evenly distributed elastic elements between the inner and outer sleeves. When air pressure is applied, the outer sleeve expands evenly and clamps the core, ensuring the smoothness of the winding process. In practice, after inserting the air shaft into the bearing housing, the operator injects compressed air into the air shaft through the air circuit system, setting the pressure between 0.6 MPa and 0.8 MPa to ensure that the air shaft can firmly clamp the core.

[0020] Furthermore, this invention optimizes the structure of the upper and lower winding devices, arranging them in a staggered manner to achieve simultaneous winding of the upper and lower rolls. Specifically, the upper winding roller is staggered 350mm to the left through the wall plate, and the lower winding roller is staggered 350mm to the right through the wall plate. This design not only solves the problem of insufficient width but also improves the overall compactness of the equipment through reasonable space utilization. In practical applications, the upper and lower winding rollers are used to wind 724mm wide finished rolls, and their operating speeds are kept consistent to ensure the flatness and consistency of the copper foil after slitting.

[0021] The proximity roller 9 is designed based on the principle of photoelectric sensors, with a detection accuracy of ±0.1mm. It is used to automatically sense the size of the slitting and winding, and maintain a constant gap by adjusting the distance between itself and the roller surface. During actual operation, the photoelectric sensor of the proximity roller 9 monitors changes in the winding diameter in real time and transmits the signal to the control system. The control system automatically adjusts the distance between the proximity roller 9 and the winding roller based on the received signal, thereby ensuring that the tension of the copper foil remains stable throughout the winding process. This design significantly improves the quality and efficiency of slitting and winding.

[0022] The lower take-up roller 10 is suitable for centering and slitting wide cores and copper foils. Its surface is coated with an antistatic coating to reduce static electricity accumulation during high-speed operation. The antistatic coating uses a conductive polymer material with a surface resistivity controlled between 10^6 Ω and 10^8 Ω, effectively eliminating the influence of static electricity on the copper foil slitting process. The upper and lower slitting and take-up rollers 11 and 12 are used to flatten the foil surface and remove wrinkles. Their pressure is adjustable from 0.5 N to 5 N, allowing for flexible adjustment based on the copper foil material. In actual operation, operators can adjust the cylinder pressure of the rollers to change the force exerted on the copper foil, thus meeting the slitting requirements of copper foils of different thicknesses.

[0023] The extended bearing housing 13 of the take-up roller is used for the roller's loading and unloading sliding. It contains a self-lubricating bearing, significantly reducing the operator's workload. The self-lubricating bearing uses a graphite-filled composite material, which maintains a low coefficient of friction during long-term operation, thus extending the bearing's service life. The edge material take-up shaft 14 is used to collect edge material. Its rotation speed is synchronized with the main take-up shaft, preventing edge material accumulation or breakage. In practice, the edge material take-up shaft 14 is controlled by an independent drive motor, with its rotation speed set to a 1:1 ratio with the main take-up shaft to ensure a smooth and efficient edge material collection process.

[0024] The operating principle of this utility model is as follows: S1 After the slitting machine is started, the feeding mechanism feeds the wide lithium-ion battery copper foil into the correction mechanism. The correction mechanism detects the edge position of the copper foil through a photoelectric sensor and automatically adjusts the lateral position of the copper foil to ensure the accuracy of the slitting process. S2 The copper foil after correction enters the tension mechanism. The tension mechanism controls the tension of the copper foil by adjusting the current of the magnetic powder brake to keep it within the set range. S3 The copper foil then enters the slitting mechanism. The slitting mechanism cuts the wide copper foil into two finished rolls with a width of 724mm through the cooperation of the upper and lower blades. S4 The slitting copper foil enters the upper winding device and the lower winding device respectively. The upper winding roller and the lower winding roller wind the two finished rolls respectively. During this process, the proximity roller 9 monitors the change in winding diameter in real time and adjusts the distance between itself and the winding roller through the control system to ensure the stability of the winding process. S5 The edge material winding shaft 14 collects the edge material generated during the slitting process simultaneously to avoid edge material accumulation or breakage.

[0025] The technical advantages of this invention are mainly reflected in the following aspects: First, by adjusting the position of the winding device and optimizing the transmission system, simultaneous slitting and winding of wide lithium-ion battery copper foil from top to bottom is achieved, significantly improving production efficiency. Second, the device makes full use of existing slitting machine wall panels and equipment, eliminating the need to develop a new wide-width slitting machine, thus greatly reducing equipment modification costs and time. Third, the improvement of the transmission system enhances the precision of the electronic control configuration, resulting in a significant improvement in both the efficiency of slitting finished products and the operating precision of the slitting machine. Finally, this invention solves the problem of existing slitting machines being phased out due to insufficient width, extending equipment lifespan and improving resource utilization.

[0026] In particular, this invention is highly operable in its implementation. For example, the increase in the transmission gear shaft spacing and the relocation of the geared motor are both modifications based on the existing equipment structure, eliminating the need for additional large-scale processing equipment. The selection of the synchronous belt also fully considers common specifications on the market, facilitating procurement and replacement. Furthermore, the customized solution for the extended air shaft incorporates a standardized production process, ensuring product quality while shortening the delivery cycle.

[0027] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A wide-format lithium battery copper foil slitting and winding device, comprising a slitting machine wall plate, an upper winding device, and a lower winding device, characterized in that... The motor drive end of the upper winding device is shifted 210mm to the left, and the motor drive end of the lower winding device is shifted 210mm to the right. The width of the slitting machine wall panel is 2030mm. It also includes an approach roller (9), a lower winding roller (10), an upper slitting and winding pressure roller (11), a lower slitting and winding pressure roller (12), an extended bearing seat for the winding roller (13), and an edge material winding shaft (14).

2. The wide-format lithium battery copper foil slitting and winding device as described in claim 1, characterized in that, The upper winding device and the lower winding device are staggered to enable simultaneous winding of the upper and lower rolls. The upper winding roller is staggered 350mm to the left through the wall plate, and the lower winding roller is staggered 350mm to the right through the wall plate.

3. The wide lithium copper foil slitting and winding apparatus according to claim 2, wherein The upper and lower take-up rollers are used to take up finished rolls with a width of 724mm, and their operating speeds are consistent.

4. The wide-format lithium battery copper foil slitting and winding device as described in claim 3, characterized in that, The proximity roller (9) is designed based on the principle of photoelectric sensor, with a detection accuracy of ±0.1mm. It is used to automatically sense the size of the slitting and winding and adjust the distance from the roller surface to maintain a constant gap.

5. The wide lithium copper foil slitting and winding apparatus according to claim 4, wherein The proximity roller (9) adjusts the distance between itself and the winding roller through the control system to ensure that the tension of the copper foil remains stable during the winding process.

6. The wide-format lithium battery copper foil slitting and winding device as described in claim 5, characterized in that, The surface of the lower take-up roller (10) is coated with an antistatic coating, the surface resistivity of which is 10^6Ω to 10^8Ω.

7. The wide lithium copper foil slitting and winding apparatus according to claim 6, wherein The edge material take-up shaft (14) is controlled by an independent drive motor, and its speed ratio with that of the main take-up shaft is set to 1:1.

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