Pole piece winding device and pole piece forming equipment

Abstract

The utility model discloses a pole piece winding device and pole piece forming equipment. The pole piece winding device comprises a rack, a winding assembly and a traction assembly, the winding assembly comprises a mounting arm, a first winding drum and a driving mechanism, one end of the mounting arm is connected with the rack, the first winding drum is rotationally arranged at the other end of the mounting arm, and the driving mechanism is connected with the first winding drum; the traction assembly comprises a mounting bracket, an air swelling shaft, a second winding drum and a traction belt, the mounting bracket and the rack are arranged at an interval, the air swelling shaft is rotationally arranged on the mounting bracket, the second winding drum sleeves the air swelling shaft, and the traction belt is at least partially wound on the second winding drum; the pole piece is attached to the traction belt and then conveyed to the first winding drum. The traction belt does not pass through a rolling device, the probability that the traction belt is fractured or fractured is reduced, the winding efficiency of the pole piece is improved, solid loss and scrapping caused by the fact that no traction belt exists in the next procedure are reduced, and then the cost and time for re-splicing the belt in the next procedure are saved.

Description

Technical Field

[0001] The utility model relates to the technical field of battery production, and particularly relates to a pole piece winding device and a pole piece forming device. Background Art

[0002] A lithium-ion battery refers to a lithium-ion battery containing lithium (including metallic lithium, lithium alloy, lithium ions, and lithium polymers) in an electrochemical system. In recent years, due to many advantages such as long cycle life, good safety performance, and fast charge and discharge, lithium-ion batteries have been widely used in fields such as digital products, electric vehicles, and energy storage systems.

[0003] The pole piece is a key component of a lithium-ion battery. The manufacturing process of the pole piece is as follows: First, an electrode slurry is coated on the surface of a current collector by a coater, and the coated electrode slurry is dried to be solidified on the surface of the current collector. Then, the pole piece is rolled by a rolling device to obtain a pole piece with a compact structure. After the pole piece is processed, it needs to be wound up.

[0004] The following problems exist in the winding process of the pole piece in the prior art: The traction belt is generally arranged on the side of the rolling device and the unwinding side of the pole piece. Due to the insufficient ductility of the traction belt and improper setting of the roll pressure of the rolling device, excessive pressure will be exerted on the traction belt passing through the roll, resulting in the traction belt being cracked or broken when passing through the roll. Summary of the Utility Model

[0005] The main purpose of the utility model is to propose a pole piece winding device and a pole piece forming device, aiming to solve the technical problem that the existing traction belt is prone to cracking or breaking when passing through the roll.

[0006] To achieve the above object, the utility model proposes a pole piece winding device for winding the pole piece of a battery, including:

[0007] A frame;

[0008] A winding assembly, the winding assembly is arranged on one side of the frame. The winding assembly includes a mounting arm, a first winding drum, and a driving mechanism. One end of the mounting arm is connected to the frame, the first winding drum is rotatably arranged at the other end of the mounting arm, and the driving mechanism is connected to the first winding drum;

[0009] A traction assembly, the traction assembly is arranged on the other side of the frame. The traction assembly includes a mounting bracket, an air shaft, a second winding drum, and a traction belt. The mounting bracket is arranged at an interval from the frame. The air shaft is rotatably arranged on the mounting bracket. The second winding drum is sleeved on the air shaft, and the traction belt is at least partially wound around the second winding drum;

[0010] The pole piece is located below the traction belt and is conveyed to the first winding drum after being attached to the traction belt.

[0011] The axes of the first reel and the second reel are both parallel to the horizontal plane.

[0012] In some embodiments, the pole piece winding device further includes a first guiding assembly for guiding the traction belt and the pole piece to the first reel. The first guiding assembly is located between the mounting arm and the mounting bracket and includes at least one first guiding roller for pressing the traction belt and the pole piece.

[0013] In some embodiments, at least two first guiding rollers are provided. The at least two first guiding rollers are spaced apart and provided at the top of the frame.

[0014] In some embodiments, the first guiding assembly further includes a second guiding roller that is vertically arranged with the first guiding roller in the horizontal direction.

[0015] In some embodiments, the pole piece winding device further includes a pole piece guiding wheel. The pole piece guiding wheel is provided on the mounting bracket and is located below the second reel.

[0016] In some embodiments, the second reel, the pole piece guiding wheel, the first guiding roller, the second guiding roller, and the first reel are arranged in a gradually decreasing order in the horizontal direction.

[0017] In some embodiments, the pole piece winding device further includes a tension adjusting mechanism. The tension adjusting mechanism is provided on the mounting bracket and includes an adjusting wheel that contacts the pole piece and is used to adjust the tension of the pole piece.

[0018] In some embodiments, a mounting plate is horizontally provided at the bottom of the frame, and the mounting bracket is connected to the mounting plate.

[0019] In some embodiments, the diameter of the first reel is larger than the diameter of the second reel.

[0020] The present utility model further provides a pole piece forming device, including:

[0021] A unwinding device for winding and releasing the pole piece to be roll-pressed;

[0022] A roll-pressing device for roll-pressing the pole piece conveyed by the unwinding device;

[0023] And the pole piece winding device as described above, which is used to wind the roll-pressed pole piece.

[0024] The pole piece winding device provided by this application is equipped with a traction assembly. The traction assembly includes a mounting bracket, an air shaft, a second reel, and a traction belt. The air shaft is rotatably arranged on the mounting bracket, the second reel is sleeved on the air shaft, and the traction belt is at least partially wound around the second reel. The pole piece is located below the traction belt and is conveyed to the first reel after being attached to the traction belt. That is, the traction belt of this application is used to attach to the pole piece after rolling, without passing through the rollers of the rolling device, reducing the probability of the traction belt being cracked or broken, improving the winding efficiency of the pole piece. At the same time, the first reel is covered by the traction belt, reducing the uneven points and wrinkling abnormalities on the periphery of the first reel, reducing the solid waste scrapping caused by the absence of the traction belt in the next process, and thus saving the cost and time of reconnecting the belt in the next process. Description of the Drawings

[0025] Figure 1 It is a schematic structural diagram of an embodiment of the pole piece winding device of the present utility model;

[0026] Figure 2 It is a structural block diagram of an embodiment of the pole piece forming equipment of the present utility model.

[0027] Explanation of the reference numerals in the drawings:

[0028] Label Name Label Name 100 Pole piece winding device 10 Frame 20 Winding assembly 21 Mounting arm 22 First reel 31 Mounting bracket 30 Traction assembly 33 Second reel 32 Air shaft 40 First guiding assembly 34 Traction belt 50 Pole piece guiding wheel 41 First guiding roller 200 Pole piece forming equipment 42 Second guiding roller 202 Rolling device 201 Unwinding device 300 Pole piece 60 Tension adjustment mechanism 61 Adjusting wheel 11 Mounting plate

[0029] The realization, functional characteristics, and advantages of the object of the present utility model will be further described in conjunction with the embodiments and with reference to the drawings. Detailed Embodiments

[0030] Next, the solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

[0031] It should be noted that all the directional indications (such as up, down, left, right, front, back...) in the embodiments of the present utility model are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the drawings). If the specific posture changes, the directional indications will also change accordingly.

[0032] It should also be noted that when an element is referred to as being "fixed to" or "arranged on" another element, it can be directly on the other element or there may be an intermediate element at the same time. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intermediate element at the same time.

[0033] In addition, the descriptions involving "first", "second", etc. in the present utility model are only for descriptive purposes and should not be construed as indicating or implying their relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions between various embodiments may be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0034] Please refer to Figure 1 , an embodiment of the present application provides a pole piece winding device 100, which includes a frame 10, a winding assembly 20 and a traction assembly 30; the winding assembly 20 is arranged on one side of the frame 10, and the winding assembly 20 includes a mounting arm 21, a first reel 22 and a driving mechanism. One end of the mounting arm 21 is connected to the frame 10, the first reel 22 is rotatably arranged at the other end of the mounting arm 21, and the driving mechanism is connected to the first reel 22 for driving the first reel 22 to rotate relative to the mounting arm 21;

[0035] The traction assembly 30 is arranged on the other side of the frame 10. The traction assembly 30 includes a mounting bracket 31, an air shaft 32, a second reel 33 and a traction belt 34. The mounting bracket 31 is arranged at an interval from the frame 10. The air shaft 32 is rotatably arranged on the mounting bracket 31. The second reel 33 is sleeved on the air shaft 32, and the traction belt 34 is at least partially wound around the second reel 33;

[0036] The pole piece 300 is located below the traction belt 34 and is conveyed to the first reel 22 after being attached to the traction belt 34;

[0037] The axes of the first reel 22 and the second reel 33 are both parallel to the horizontal plane.

[0038] In this embodiment, after the pole piece 300 is roll-pressed, the end of the pole piece 300 is attached (e.g., adhered) to the traction belt 34, and then the pole piece 300 and the traction belt 34 are jointly wound on the first reel 22. The driving mechanism drives the first reel 22 to rotate, so as to wind the pole piece 300 and the traction belt 34 on the first reel 22, thereby completing the winding of the pole piece 300.

[0039] The traction belt 34 of the present application is used to connect with the roll-pressed pole piece 300, that is, the traction belt 34 does not pass through the rollers of the roll-pressing device 202. Therefore, the probability of the traction belt 34 being cracked or broken is reduced, the winding efficiency of the pole piece 300 is improved. At the same time, the first reel 22 is covered by the traction belt 34, reducing the peripheral uneven points and wrinkling abnormalities of the first reel 22, and reducing the solid waste scrapping caused by the absence of the traction belt 34 in the next process, thereby saving the cost and time of reconnecting the belt in the next process.

[0040] In this embodiment, the air shaft 32 is used to expand when inflated to firmly fix the second reel 33, and quickly contract when deflated to facilitate unloading. Its working principle depends on air pressure. By inflating the shaft, the keys, aluminum tiles or rubber on the outer surface of the shaft expand evenly, thus tightly locking the second reel 33. During the winding process of the pole piece 300, the air shaft 32 expands by inflating to support the inner wall, preventing the traction belt 34 from rotating or sliding, thereby ensuring the smooth progress of the traction winding work.

[0041] In this application, by increasing the cooperation between the traction belt 34 and the air shaft 32, the step of separately preparing an empty reel for winding the traction belt 34 during the traditional winding process of the pole piece 300 can be omitted, thus simplifying the winding process of the pole piece 300 and improving production efficiency. In addition, by using the air shaft 32 and the corresponding control system, the rapid replacement and adjustment of the traction belt 34 can be realized, further adapting to different production requirements.

[0042] In this application, the axes of both the first reel 22 and the second reel 33 are parallel to the horizontal plane, which is to ensure the stability and consistency of the pole piece 300 during the winding process. Specifically, the axes parallel to the horizontal plane can reduce the friction and stress of the pole piece 300 during the winding process, thus avoiding deformation or damage of the pole piece 300. In addition, this design also helps to improve production efficiency because the winding process is smoother, reducing the need for production pauses or adjustments caused by non-parallel axes.

[0043] In this embodiment, the driving mechanism can be a motor, and the rotational motion of the motor is used to realize the winding of the pole piece 300. During the winding process of the pole piece 300, the method of using a motor drive has the following significant advantages:

[0044] 1. Improve production efficiency: The pole piece winding device 100 driven by a motor can provide stable and efficient power output, ensuring the speed and efficiency of the winding of the pole piece 300, thereby increasing the overall production speed.

[0045] 2. Ensure product consistency: Through the precise control of the motor, the winding tension of the pole piece 300 can be ensured to be uniform, avoiding the situation of uneven tightness during the winding process of the pole piece 300, thereby ensuring the overall consistency of the product.

[0046] 3. Improve the finished product rate: The use of a motor can reduce the damage of the pole piece 300 caused by improper manual operation. At the same time, by precisely controlling the winding tension, the breakage or deformation of the pole piece 300 during the winding process can be reduced, thereby increasing the qualified rate of the finished product.

[0047] 4. Achieve automated control: The pole piece winding device 100 driven by a motor can be combined with a modern control system to achieve automated control, adjust the winding speed and tension according to production requirements, and improve the flexibility and intelligence level of production.

[0048] In summary, the application of the motor in the winding of the pole piece 300 not only improves production efficiency and the finished product rate, but also ensures product consistency, and at the same time realizes automated control.

[0049] In some embodiments, the diameter of the first reel 22 is larger than the diameter of the second reel 33. Such a design helps to improve the winding efficiency and ensure the neat arrangement of the pole piece 300. Specifically, by using the first reel 22 and the second reel 33 with different diameters, the tension of the pole piece 300 can be better controlled during the winding process, avoiding the pole piece 300 from being slack or distorted during winding, thereby improving the quality and consistency of the pole piece 300. In addition, this design can also adapt to the winding requirements of pole pieces 300 of different specifications, increasing the flexibility and applicability of the device. By reasonably setting the diameters of the first reel 22 and the second reel 33, the working efficiency can be improved while ensuring the winding quality.

[0050] Please continue to refer to Figure 1 , the pole piece winding device 100 further includes a first guiding assembly 40 for guiding the traction belt 34 and the pole piece 300 to the first reel 22. The first guiding assembly 40 is located between the mounting arm 21 and the mounting bracket 31 and includes at least one first guiding roller 41 for pressing the traction belt 34 and the pole piece 300.

[0051] In this embodiment, the first guiding roller 41 can ensure that the traction belt 34 and the pole piece 300 can move stably and accurately during the transmission process, realizing the pressing and guiding of the traction belt 34 and the pole piece 300, thereby ensuring the smooth operation and high-efficiency production of the entire device. Specifically, the first guiding roller 41 can closely fit the surfaces of the traction belt 34 and the pole piece 300, providing the necessary pressure to prevent them from shifting or sliding during the transmission process. Moreover, the first guiding roller 41 is also responsible for guiding the traction belt 34 and the pole piece 300 to move along a predetermined path, ensuring that they can maintain a straight line or a specific curve trajectory during the transmission process.

[0052] In some embodiments, at least two first guiding rollers 41 are provided, and the at least two first guiding rollers 41 are spaced apart and arranged on the top of the frame 10.

[0053] In this embodiment, by providing a plurality of first guiding rollers 41 and maintaining a certain interval, the pressure and traction force can be effectively dispersed, avoiding excessive pressure on a single point resulting in damage or a decrease in production efficiency, and ensuring the stability of the pole piece 300 and the traction belt 34 during the transmission process.

[0054] It should be noted that the first guiding roller 41 is provided with one, two, three or more than three, and the embodiments of the present application do not limit this here.

[0055] In some embodiments, the first guiding assembly further includes a second guiding roller 42 which is arranged at a different height from the first guiding roller 41 in the horizontal direction.

[0056] In this embodiment, the combination of the first guiding roller 41 and the second guiding roller 42 can guide and change the traveling directions of the traction belt 34 and the pole piece 300, and precisely control the transmission paths of the traction belt 34 and the pole piece 300, so as to meet various requirements during the winding process of the pole piece 300.

[0057] Specifically, by setting the first guiding roller 41 and the second guiding roller 42, the directions and speeds of the pole piece 300 and the traction belt 34 can be effectively controlled, and the pole piece 300 and the traction belt 34 can be prevented from shifting or jamming during the transmission process, thereby improving the operation efficiency and reliability of the entire device. In addition, this design can also adapt to pole pieces 300 and traction belts 34 of different sizes and weights. By adjusting the positions and angles of the first guiding roller 41 and the second guiding roller 42, various transmission requirements can be met, ensuring that the pole piece 300 and the traction belt 34 can be smoothly transmitted.

[0058] In some embodiments, the pole piece winding device 100 further includes a pole piece guiding wheel 50, and the pole piece guiding wheel 50 is arranged on the mounting bracket 31 and is located below the second winding drum 33.

[0059] In this embodiment, the pole piece guiding wheel 50 can effectively guide the transmission of the pole piece 300. Specifically, by arranging the pole piece guiding wheel 50 on the mounting bracket 31, the direction and speed of the pole piece 300 can be effectively controlled, and the pole piece 300 can be prevented from shifting or jamming during the transmission process, thereby improving the operation efficiency and reliability of the entire device. In addition, this design can also adapt to pole pieces 300 of different sizes and weights. By adjusting the position and angle of the pole piece guiding wheel 50, various transmission requirements can be met, ensuring that the pole piece 300 can be smoothly transmitted.

[0060] In some embodiments, the second winding drum 33, the pole piece guiding wheel 50, the first guiding roller 41, the second guiding roller 42, and the first winding drum 22 are arranged in a gradually decreasing manner in the horizontal direction, which helps the pole piece 300 and the traction belt 34 to gradually reduce their heights during the transmission process, so as to maintain a stable transmission path and tension, reduce the fluctuations and jumps of the pole piece 300 and the traction belt 34 during the transmission process, and improve the smoothness and accuracy of the transmission. In addition, by arranging these components in a gradually decreasing manner in the horizontal direction, the device space can be more effectively utilized, unnecessary material bending and folding can be reduced, and energy consumption and wear can be lowered.

[0061] In some embodiments, the pole piece winding device 100 further includes a tension adjustment mechanism 60. The tension adjustment mechanism 60 is disposed on the mounting bracket 31 and includes an adjustment wheel 61 that contacts the pole piece 300 and is used to adjust the tension of the pole piece 300.

[0062] In this embodiment, by adjusting the adjustment wheel 61, the tension of the pole piece 300 can be adjusted in real time to ensure that the pole piece 300 maintains an appropriate tension during the winding process, neither breaking due to excessive tightness nor misaligning due to excessive looseness, thereby ensuring the quality and efficiency of winding. This design not only improves the applicability and reliability of the pole piece winding device 100, but also increases the stability and safety of the winding of the pole piece 300.

[0063] In some embodiments, a mounting plate 11 is horizontally provided at the bottom of the frame 10, and the mounting bracket 31 is connected to the mounting plate 11.

[0064] In this embodiment, by connecting the mounting bracket 31 to the mounting plate 11, the frame 10 and the mounting bracket 31 are connected as a whole, with better structural stability and a more convenient and rapid installation process.

[0065] It should be noted that the connection method between the mounting bracket 31 and the mounting plate 11 can be various, such as bolt connection, welding connection, snap connection, etc. Preferably, in this embodiment, the mounting bracket 31 and the mounting plate 11 are bolt-connected, which is both convenient and reliable and can be easily disassembled and reinstalled.

[0066] Please refer to Figure 2 , this application embodiment also provides a pole piece forming device 200, including an unwinding device 201, a rolling device 202, and a pole piece winding device 100. The unwinding device 201 is used to wind and release the pole piece 300 to be rolled; the rolling device 202 is used to roll the pole piece 300 conveyed by the unwinding device 201; the pole piece winding device 100 is used to wind the rolled pole piece 300.

[0067] Since the pole piece forming device 200 adopts all the technical solutions of all the embodiments of the above-mentioned pole piece winding device 100, the pole piece forming device 200 of the present utility model also has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be elaborated herein one by one.

[0068] The above embodiments of the present utility model are merely examples for clearly illustrating the present utility model and are not limitations on the implementation manners of the present utility model. For those of ordinary skill in the art, other different forms of changes or variations can be made based on the above description. It is impossible to enumerate all the implementation manners here. Any obvious changes or variations derived from the technical solutions of the present utility model still fall within the protection scope of the present utility model.

Claims

1. A pole piece winding device for winding the pole pieces of a battery, characterized in that, Comprising: Frame; Rewinding assembly, the rewinding assembly is arranged on one side of the frame, the rewinding assembly includes a mounting arm, a first reel and a driving mechanism, one end of the mounting arm is connected to the frame, the first reel is rotatably arranged at the other end of the mounting arm, and the driving mechanism is connected to the first reel; Traction assembly, the traction assembly is arranged on the other side of the frame, the traction assembly includes a mounting bracket, an air shaft, a second reel and a traction belt, the mounting bracket is arranged at an interval from the frame, the air shaft is rotatably arranged on the mounting bracket, the second reel is sleeved on the air shaft, and the traction belt is at least partially wound around the second reel; The pole piece is located below the traction belt and is conveyed to the first reel after being attached to the traction belt; The axes of the first reel and the second reel are both parallel to the horizontal plane.

2. The pole piece winding device according to claim 1, characterized in that, The pole piece rewinding device further includes a first guiding assembly for guiding the traction belt and the pole piece to the first reel, the first guiding assembly is located between the mounting arm and the mounting bracket, and includes at least one first guiding roller for pressing the traction belt and the pole piece.

3. The pole piece winding device according to claim 2, characterized in that, There are at least two first guiding rollers, and at least two first guiding rollers are arranged at intervals on the top of the frame.

4. The pole piece winding device according to claim 3, characterized in that, The first guiding assembly further includes a second guiding roller which is arranged at a different height from the first guiding roller in the horizontal direction.

5. The pole piece winding device according to claim 4, characterized in that, The pole piece rewinding device further includes a pole piece guiding wheel, and the pole piece guiding wheel is arranged on the mounting bracket and is located below the second reel.

6. The pole piece winding device according to claim 5, characterized in that, The second reel, the pole piece guiding wheel, the first guiding roller, the second guiding roller, and the first reel are arranged in a gradually decreasing order in the horizontal direction.

7. The pole piece winding device according to claim 5, wherein, The pole piece rewinding device further includes a tension adjusting mechanism, the tension adjusting mechanism is arranged on the mounting bracket, and includes an adjusting wheel that contacts the pole piece and is used for adjusting the tension of the pole piece.

8. The pole piece winding device according to any one of claims 1 to 7, characterized in that, A mounting plate is horizontally arranged at the bottom of the frame, and the mounting bracket is connected to the mounting plate.

9. The pole piece winding device according to claim 8, characterized in that, The diameter of the first reel is larger than the diameter of the second reel.

10. A pole piece forming device, characterized in that, Comprising: Unwinding device, used for winding and releasing the pole piece to be roll-pressed; Rolling device, used for rolling the pole piece conveyed by the unwinding device; And the pole piece rewinding device according to any one of claims 1 to 9, the pole piece rewinding device is used for rewinding the roll-pressed pole piece.

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