Static electricity removing and winding device for lithium battery diaphragm
By designing a lithium battery separator winding device including guide rollers, open-web rollers and electrostatic elimination devices, the problems of insufficient flatness and excessive static electricity in separator winding are solved, and high-quality and safe winding of the separator are achieved.
Patent Information
- Application Number
- CN202422146857.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-02
- Publication Date
- 2025-06-27
- Estimated Expiration
- 2034-09-02
AI Technical Summary
The lithium battery separator is poorly flat during the winding process, which is prone to wrinkles and creases, and has a large amount of static electricity, which can easily lead to air discharge, electric shock or fire, affecting product quality and safety.
A lithium battery separator electrostatic winding device is designed, including a winding frame, a first guide roller, a second guide roller, an open-web roller, an electrostatic elimination rod and an electrostatic elimination rope. Through the coordination of the guide roller and an open-web roller, the diaphragm is ensured to be smoothly and winding, and at the same time, the static elimination rod and rope eliminate static electricity on the diaphragm.
It effectively solves the problem of insufficient flatness during diaphragm winding, significantly reduces the static electricity of the diaphragm, avoids air discharge and fire risks, and improves the quality and safety of the product.
Smart Images
Figure CN223032598U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of lithium battery separator production, and particularly relates to an electrostatic eliminating and winding device for lithium battery separators. Background Art
[0002] In the structure of a lithium battery, the separator is one of the key inner components. The performance of the separator determines the interface structure, internal resistance, etc. of the battery, and directly affects the characteristics such as the capacity, cycle, and safety performance of the battery. The main function of the separator is to separate the positive and negative electrodes of the battery to prevent the two electrodes from contacting and short-circuiting. In addition, it also has the function of allowing electrolyte ions to pass through. However, in the production of traditional lithium battery separators, the winding of the separator often has poor flatness, resulting in problems such as wrinkles and creases. And the separator has a large amount of static electricity, which is likely to cause air discharge, resulting in electric shock or fire, and leading to the adsorption of dust and impurities, ultimately affecting the product quality and safety.
[0003] Therefore, it is urgent to design an electrostatic eliminating and winding device for lithium battery separators to improve the problems of winding and static electricity. Summary of the Utility Model
[0004] The main purpose of the utility model is to provide an electrostatic eliminating and winding device for lithium battery separators to overcome or improve at least one technical problem of the existing technology, or to provide a useful alternative solution.
[0005] To solve the above technical problems, the utility model adopts the following technical solutions:
[0006] An electrostatic eliminating and winding device for lithium battery separators includes a winding frame. Along the running direction of the separator, a first guide roller, a second guide roller, and a core are sequentially arranged on the winding frame. The first guide roller, the second guide roller, and the core are all rotatably arranged on the winding frame. An unwinding roller is arranged above the winding frame, and the unwinding roller is located between the first guide roller and the second guide roller. An electrostatic eliminating bar is arranged below the first guide roller on the winding frame, and an electrostatic eliminating rope is arranged below the second guide roller on the winding frame. A driving mechanism is installed on the winding frame, and the driving mechanism is connected to the core through a transmission mechanism.
[0007] Further, the driving mechanism adopts a servo motor. The transmission mechanism includes a first gear, a second gear, and an air shaft. The first gear is connected to the output end of the servo motor, the second gear meshes with the first gear, the air shaft is fixedly sleeved outside the gear shaft of the second gear, the core is fixedly sleeved outside the air shaft, and the gear shaft of the second gear is rotatably installed on the winding frame.
[0008] Further, the servo motor is externally connected to a control box through a cable.
[0009] Further, the transmission reduction ratio of the first gear and the second gear is 2:1 or 3:1.
[0010] Further, the designed wrap angle of the spreading roller is greater than 180 degrees.
[0011] Further, the distance between the static eliminator bar and the diaphragm on the first guide roller is 1 - 2 cm, and the distance between the static eliminator cord and the diaphragm on the second guide roller is 1 - 2 cm.
[0012] Compared with the prior art, the present utility model has the following beneficial effects:
[0013] By providing the first guide roller and the second guide roller to play a guiding role, by providing the spreading roller to unfold the unrolled part of the diaphragm to make it flat, and by providing the static eliminator bar and the static eliminator cord to eliminate static electricity, finally, the problems of poor flatness, wrinkles and creases in the winding of the diaphragm in the traditional production of lithium battery diaphragms are solved, and the static electricity amount of the diaphragm is significantly reduced, and the static electricity amount is less than the standard value, avoiding the problems of electric shock or fire caused by air discharge, and adsorbing dust and impurities, which affect the product quality and safety. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 It is a schematic diagram of the overall structure of the present utility model.
[0015] Among them, 1. winding frame, 2. static eliminator bar, 3. first guide roller, 4. spreading roller, 5. static eliminator cord, 6. second guide roller, 7. core, 8. air shaft, 9. first gear, 10. servo motor, 11. control box. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0016] The technical solutions of the present utility model will be further described below with reference to the drawings and embodiments.
[0017] Combined with Figure 1 , this embodiment provides a static eliminator winding device for lithium battery diaphragms, including a winding frame 1, on which a first guide roller 3, a second guide roller 6 and a core 7 are sequentially arranged along the running direction of the diaphragm. The first guide roller 3, the second guide roller 6 and the core 7 are all rotatably arranged on the winding frame 1. Above the winding frame 1, there is a spreading roller 4, and the spreading roller 4 is located between the first guide roller 3 and the second guide roller 6. Below the first guide roller 3 on the winding frame 1, there is a static eliminator bar 2, and below the second guide roller 6 on the winding frame 1, there is a static eliminator cord 5. A driving mechanism is installed on the winding frame 1, and the driving mechanism is connected to the core 7 through a transmission mechanism.
[0018] With this solution, the first guide roller 3 and the second guide roller 6 play a guiding role. The function of the unwinding roller 4 is to unwind the unrolled part of the diaphragm, making the diaphragm flat, wrinkle-free, and not overstretched. The static eliminator bar 2 uses a high-voltage power supply to actively eliminate most of the static electricity. The static eliminator cord 5 uses a passive elimination method. After grounding, the remaining static electricity is conducted out. Finally, the problems of poor flatness, wrinkles, and creases in the winding of the diaphragm in the traditional production of lithium battery diaphragms are solved, and the static electricity amount of the diaphragm is significantly reduced, with the static electricity amount less than the standard value, avoiding the problems of electric shock or fire caused by easy air discharge, resulting in the adsorption of dust and impurities, and affecting product quality and safety.
[0019] In this embodiment, the driving mechanism uses a servo motor 10. The transmission mechanism includes a first gear 9, a second gear, and an air shaft 8. The first gear 9 is connected to the output end of the servo motor 10. The second gear meshes with the first gear 9. The air shaft 8 is fixedly sleeved outside the gear shaft of the second gear. The core 7 is fixedly sleeved outside the air shaft 8. The gear shaft of the second gear is rotatably installed on the winding frame 1.
[0020] With this solution, the servo motor 10 is used for winding, with high tension control accuracy and appropriate winding hardness. The transmission reduction ratio of the first gear 9 and the second gear is 2:1 or 3:1, which further facilitates the precise control of the tension of the lithium battery diaphragm.
[0021] In this embodiment, the servo motor 10 is externally connected to a control box 11 through a cable. The control box 11 can control the opening and closing of the servo motor 10.
[0022] In this embodiment, the designed wrap angle of the unwinding roller 4 is greater than 180 degrees. With this solution, the stability of the lithium battery diaphragm can be guaranteed, which is more conducive to the unwinding of the diaphragm.
[0023] In this embodiment, the distance between the static eliminator bar 2 and the diaphragm on the first guide roller 3 is 1 - 2 cm, and the distance between the static eliminator cord 5 and the diaphragm on the second guide roller 6 is 1 - 2 cm. The closer the static eliminator bar 2 and the static eliminator cord 5 are installed to the lithium battery diaphragm, the better the effect. Without affecting the smooth winding of the diaphragm, it is best to be 1 - 2 cm away from the diaphragm, so that the static electricity on the lithium battery diaphragm can be fully eliminated.
[0024] During operation, the control box 11 uses a programmable controller to calculate and control the servo motor 10. The servo motor 10 has high torque control accuracy. It is transmitted to the air shaft 8 through the first gear 9 and the second gear. The air shaft 8 drives the core 7 to wind the lithium battery diaphragm.
[0025] Specifically, the lithium battery separator enters the winding rack 1 through the production line drive. The separator passes through the first guide roller 3, and an electrostatic eliminator bar 2 is installed below it. The electrostatic eliminator bar 2 actively eliminates most of the static electricity using a high-voltage power supply. Subsequently, the separator passes through the unwinding roller 4, whose function is to unwind the unrolled parts of the separator to make it flat. And it passes through the second guide roller 6, and an electrostatic elimination cord 5 is installed below it. The electrostatic elimination cord 5 uses a passive elimination method and conducts the remaining static electricity to the ground after being grounded. Finally, it passes through the air shaft 8 and is evenly wound on the core 7.
[0026] As described above, it is only a preferred embodiment of the present invention, and it does not impose any limitation on the technical scope of the present invention. Therefore, any minor modification, equivalent change, and modification made to the above embodiments based on the technical essence of the present invention still fall within the scope of the technical solution of the present invention.
Claims
1. A lithium battery diaphragm anti-static winding device, characterized in that: The invention comprises a winding frame, on which a first guide roller, a second guide roller and a winding core are sequentially arranged along the running direction of the diaphragm, the first guide roller, the second guide roller and the winding core are all rotatably arranged on the winding frame, an opening roller is arranged above the winding frame, the opening roller is located between the first guide roller and the second guide roller, a static elimination rod is arranged below the first guide roller on the winding frame, a static elimination rope is arranged below the second guide roller on the winding frame, a driving mechanism is installed on the winding frame, and the driving mechanism is connected to the winding core through a transmission mechanism.
2. A lithium battery separator anti-static winding device as claimed in claim 1, characterized in that: The driving mechanism adopts a servo motor, and the transmission mechanism includes a first gear, a second gear and an inflatable shaft. The first gear is connected to the output end of the servo motor, the second gear is meshed with the first gear, the inflatable shaft is fixedly sleeved on the outside of the gear shaft of the second gear, the winding core is fixedly sleeved on the outside of the inflatable shaft, and the gear shaft of the second gear is rotatably installed on the winding frame.
3. A lithium battery separator anti-static winding device as claimed in claim 2, characterized in that: The servo motor is externally connected to a control box via a cable.
4. A lithium battery separator anti-static winding device as claimed in claim 2, characterized in that: The transmission reduction ratio between the first gear and the second gear is 2:1 or 3:
1.
5. A lithium battery separator anti-static winding device as claimed in claim 1, characterized in that: The design wrap angle of the opening roll is greater than 180 degrees.
6. A lithium battery separator anti-static winding device as claimed in claim 1, characterized in that: The distance between the static elimination bar and the diaphragm on the first guide roller is 1-2 cm, and the distance between the static elimination rope and the diaphragm on the second guide roller is 1-2 cm.