Roll winding device, film winding device and battery processing system

Abstract

This invention discloses a roll, a film winding device, and a battery processing system. The roll includes a cylindrical body and a clamping assembly. The cylindrical body has a first clamping surface. The clamping assembly is movably disposed on the cylindrical body between a closed position and an open position. The clamping assembly has a second clamping surface. When the clamping assembly is in the open position, a gap is formed between the first clamping surface and the second clamping surface for at least a portion of the film to enter between them. When the clamping assembly is in the closed position, the first clamping surface and the second clamping surface are clamped together. This invention achieves mutual fixation of the film and the cylindrical body by clamping and fixing the film between the first and second clamping surfaces. Since no adhesive bonding process is required, the waste caused by using adhesive materials can be avoided.

Description

Technical Field

[0001] This invention relates to a roll, a film winding device, and a battery processing system. Background Technology

[0002] In the manufacturing process of power batteries, a large number of coating or film winding processes are required. Taking the coating process as an example, in order to fix the film layer, it is usually directly glued to the surface of the roll, which wastes a lot of adhesive material. Summary of the Invention

[0003] The main objective of this invention is to provide a roll that addresses the problem of wasted adhesive material in existing film layer fixing processes.

[0004] To achieve the above objectives, the present invention provides a roll for holding a film layer, the roll comprising:

[0005] A cylindrical body, the cylindrical body having a first clamping surface; and

[0006] A clamping assembly is movably disposed on the cylinder between a closed position and an open position; the clamping assembly has a second clamping surface; when the clamping assembly is in the open position, a gap is formed between the first clamping surface and the second clamping surface for allowing at least a portion of the film layer to enter between them; when the clamping assembly is in the closed position, the first clamping surface and the second clamping surface are clamped together.

[0007] By setting the clamping assembly on the cylinder, and utilizing the gap formed between the second clamping surface of the clamping assembly and the first clamping surface of the cylinder when the clamping assembly is in the open position, the membrane layer is inserted into the gap. After the membrane layer is inserted into the gap, the clamping assembly is switched to the closed position, so that the membrane layer is clamped and fixed by the first clamping surface and the second clamping surface, thereby achieving mutual fixation between the membrane layer and the cylinder. Since there is no need to use an adhesive process for connection, the waste caused by using adhesive materials can be avoided.

[0008] In some examples, the clamping component includes:

[0009] Pressure bar, the pressure bar having the second clamping surface; and

[0010] A connecting rod is movably mounted on the cylinder and connected to the pressure bar, so that the connecting rod can drive the pressure bar to move between the closed position and the open position.

[0011] The pressure bar is used to press the membrane layer onto the cylinder so that the membrane layer is limited between the first clamping surface and the second clamping surface; the connecting rod is used to drive the pressure bar to move so that the pressure bar can switch between the closed position and the open position, thereby realizing the clamping and fixing of the membrane layer.

[0012] In some examples, the cylinder is provided with a guide hole, one end of which extends to the outer peripheral wall of the cylinder; the connecting rod passes through the guide hole and is able to reciprocate along the guide hole, so that the connecting rod can drive the pressure bar to move between the closed position and the open position.

[0013] By setting guide holes to guide the connecting rod, the connecting rod can move along the trajectory formed by the guide holes, thereby driving the pressure bar to move along the preset trajectory, thus limiting the pressure bar. At the same time, it can improve the relative constancy of the mating position between the pressure bar and the cylinder, which helps to improve the stability of the clamping assembly when clamping the film layer.

[0014] In some examples, the clamping component further includes:

[0015] A first elastic element is disposed in the guide hole. The first elastic element is connected to the cylinder and the connecting rod respectively, so as to generate an elastic pulling force that pulls the connecting rod into the guide hole.

[0016] The first elastic element is used to traction the connecting rod, so that the connecting rod can be subjected to elastic force, and thus tend to move the pressure bar to the closed position, so that the membrane can be clamped on the cylinder by the pressure bar, and the membrane can be relatively fixed.

[0017] In some examples, the cylinder has a hollow portion;

[0018] The guide hole extends from the outer peripheral wall of the cylinder to the hollow portion;

[0019] The first elastic element is connected to the inner wall surface of the hollow part.

[0020] By connecting one end of the first elastic element to the hollow part, the first elastic element can be easily installed and fixed, giving it a larger installation space.

[0021] In some examples, the first elastic element includes:

[0022] A connector is attached to the inner wall surface of the hollow portion; and

[0023] The first spring has one end connected to the connector and the other end connected to the connecting rod.

[0024] The connector serves as a connecting structure to fix the first spring to the cylinder, thus facilitating the relative fixation of the first spring and the cylinder.

[0025] In some examples, the first spring is sleeved around the periphery of the connecting rod and extends along the length of the connecting rod.

[0026] The first spring has a hollow spiral structure, and the connecting rod is located inside the hollow part of the first spring so that the first spring can be set along the length of the connecting rod, which facilitates the installation and fixation of the first spring, while reducing the space occupied by the first spring.

[0027] In some examples, the connector is sleeved around the periphery of the connecting rod, and the maximum outer circumferential diameter of the connector is greater than the inner diameter of the guide hole.

[0028] The connector is used to fix the first spring. When the maximum outer diameter of the connector is greater than the inner diameter of the guide hole, the connector cannot move into the guide hole, thereby fixing the end of the first spring so that the end of the first spring near the connector is kept in a preset position.

[0029] In some examples, a first limiting groove is recessed on the inner wall surface of the hollow part, and one end of the guide hole away from the outer peripheral wall of the cylinder extends to the bottom of the first limiting groove; the connecting member is disposed in the first limiting groove.

[0030] The first limiting groove is used to limit the connector to prevent it from moving radially along the guide hole, thereby preventing unnecessary misalignment of the clamping assembly.

[0031] In some examples, a limiting protrusion is provided on the outer peripheral wall of the end of the connecting rod near the pressure bar, and the maximum outer peripheral diameter of the limiting protrusion is greater than the inner diameter of the guide hole.

[0032] The limiting protrusion protrudes from the outer peripheral wall of the connecting rod. The maximum outer peripheral diameter of the limiting protrusion is greater than the inner diameter of the guide hole, so that the limiting protrusion can be used to limit the maximum depth of the connecting rod inserted into the guide hole.

[0033] In some examples, a second limiting groove is provided on the outer peripheral wall of the cylinder, and one end of the guide hole away from the outer peripheral wall of the cylinder extends to the bottom of the second limiting groove; when the pressure bar is in the closed position, the limiting protrusion is embedded in the second limiting groove.

[0034] By providing a second limiting groove, a space is formed to accommodate the limiting protrusion, thereby confining the limiting protrusion to a portion recessed into the outer peripheral wall of the cylinder. When the pressure bar is in the closed position, the second clamping surface and the first clamping surface are at least partially in contact with each other, and the limiting protrusion does not obstruct the movement of the pressure bar.

[0035] In some examples, the end of the first spring away from the connector is connected to the limiting protrusion.

[0036] Since the limiting protrusion is set on the outer peripheral wall of the connecting rod, the end of the first spring away from the connecting member can extend along the extension direction of the connecting rod to the limiting protrusion and then connect with the limiting protrusion. This facilitates the mutual fixation of the first spring and the connecting rod, so that the connecting rod can be subjected to the elastic force of the first spring.

[0037] In some examples, the clamping assembly further includes a first drive member that is driven to the end of the link away from the pressure bar, for driving the link to move the pressure bar between the closed position and the open position.

[0038] The first driving component is used to drive the connecting rod to move relative to each other, so that the connecting rod can pull the pressure bar during the axial movement along the guide hole, so that the pressure bar can switch between the closed position and the open position, thereby realizing the automatic switching of the pressure bar position.

[0039] In some examples, the first drive element is a cylinder or an air shaft.

[0040] A cylinder or air shaft is used to push the connecting rod to move axially, thereby achieving synchronous movement of the pressure lever so that the pressure lever can switch positions.

[0041] In some examples, a positioning groove is recessed on the outer peripheral wall of the cylinder, and the first clamping surface is formed in the positioning groove.

[0042] By setting a positioning groove, when the pressure bar moves to the closed position, the pressure bar can be at least partially located in the positioning groove, thereby preventing the pressure bar from protruding outside the roll and causing damage to the film layer wound on the roll.

[0043] In some examples, the guide hole extends through the positioning groove.

[0044] The guide hole is used to guide the connecting rod. By making the guide hole pass through the positioning groove, the end of the connecting rod away from the drum axis is also located in the positioning groove, so as to avoid interference with the film layer wound on the drum when the connecting rod protrudes on the outer peripheral wall of the drum.

[0045] In some examples, the link has a proximal end for connecting to the lever and a distal end away from the lever;

[0046] The cylinder is provided with a positioning shaft, and the connecting rod is rotatably connected to the positioning shaft. The positioning shaft is located between the proximal end and the distal end of the connecting rod.

[0047] The drum also includes a second elastic element; the distal end of the connecting rod is connected to the drum body through the second elastic element, so that the second elastic element generates a pulling force that pulls the proximal end of the connecting rod and the pressure bar toward the first clamping surface.

[0048] The connecting rod is rotatably connected to the positioning shaft so that the connecting rod and the positioning shaft cooperate to form a lever-like mechanism. When the distal end of the connecting rod presses the second elastic element, the second elastic element can exert an elastic force on the connecting rod, thereby causing the distal end of the connecting rod to rotate relative to the positioning shaft and drive the pressure bar to move synchronously, realizing the position switching of the pressure bar.

[0049] In some examples, the clamping assembly further includes a second drive member, which is driven to the distal end of the link for driving the link to rotate about the positioning axis.

[0050] By setting a second driving component to drive the connecting rod to rotate relative to the positioning shaft, the relative movement of the connecting rod is achieved, so that the connecting rod can drive the pressure bar to move between the open position and the closed position.

[0051] In some examples, the clamping assembly further includes a third drive member disposed on the cylinder;

[0052] The link includes:

[0053] The joystick is driven and connected to the third driving component;

[0054] The active lever is rotatably connected to the end of the rocker arm away from the third drive member; and

[0055] The driven rod has one end rotatably connected to the cylinder body and the other end connected to the pressure bar and the end of the driving rod away from the rocker arm; the third driving member is used to drive the rocker arm, the driving rod and the rocker arm so that the pressure bar moves between the open position and the closed position.

[0056] The rocker arm, the driving rod, and the driven rod form a linkage mechanism. The third driving member is used to drive the relative motion of the linkage mechanism, thereby enabling the linkage mechanism to move the pressure lever between the open and closed positions.

[0057] In some examples, the cylinder is recessed with a third limiting groove, and the inner wall surface of the third limiting groove forms the first clamping surface; the connecting rod is located at both ends of the cylinder in the axial direction.

[0058] The third limiting groove is used to form a concave area for accommodating the pressure bar. When the pressure bar is in the closed position, the pressure bar is at least partially located in the third limiting groove, thereby preventing damage to the film layer when the pressure bar protrudes on the outer peripheral wall of the cylinder.

[0059] Based on the above example of a roll, this example also provides an example of a film winding device for winding a film layer, the film winding device comprising:

[0060] Main winding member, used to wind the film layer;

[0061] The reel as described in any of the examples above is disposed adjacent to the main winding member; and

[0062] An auxiliary shaft is movably disposed between the main winding member and the drum; the auxiliary shaft is used to push the film layer output by the main winding member against the drum body so that the film layer can be embedded in the gap between the first clamping surface and the second clamping surface.

[0063] The film layer is wound on the main winding member. When the auxiliary shaft pushes the film layer against the cylinder, the film layer can be pressed onto the cylinder by the clamping assembly, thereby fixing the film layer onto the roll.

[0064] Based on the above-described film winding apparatus, this example also proposes a battery processing system, including the film winding apparatus as described in the above example. Attached Figure Description

[0065] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0066] Figure 1 This is a front view of an example of the roll of the present invention;

[0067] Figure 2 This is a left view of an example of the roll of the present invention;

[0068] Figure 3 for Figure 2 A sectional view along line 2a-2a;

[0069] Figure 4 for Figure 3 A magnified view of part 3b in the middle;

[0070] Figure 5 This is a front view of an example of the cylindrical body of the present invention;

[0071] Figure 6 This is a left view of an example of the cylindrical body of the present invention;

[0072] Figure 7 for Figure 6 A sectional view along line 6a-6a;

[0073] Figure 8 This is a schematic diagram illustrating an example of the engagement state of the pressure bar and connecting rod according to the present invention.

[0074] Figure 9This is a schematic diagram of an example of the first elastic element of the present invention;

[0075] Figure 10 This is a schematic diagram of another example of the structure of the reel of the present invention;

[0076] Figure 11 for Figure 10 The main view;

[0077] Figure 12 for Figure 10 The right view;

[0078] Figure 13 This is a schematic diagram of another example of the cylindrical body of the present invention;

[0079] Figure 14 for Figure 13 The right view;

[0080] Figure 15 This is a schematic diagram of another example of the engagement state of the pressure bar and connecting rod of the present invention;

[0081] Figure 16 This is a schematic diagram of another example of the roll clamping assembly of the present invention in the open position;

[0082] Figure 17 for Figure 16 The main view;

[0083] Figure 18 for Figure 16 The right view;

[0084] Figure 19 This is a schematic diagram of an example of the film winding device of the present invention;

[0085] Figure 20 This is a schematic diagram of another example of the film winding device of the present invention;

[0086] Figure 21 This is a schematic diagram of an example of the clamping assembly of the film winding device of the present invention in the open position;

[0087] Figure 22 This is a schematic diagram of an example of the clamping assembly of the film winding device of the present invention in the closed position.

[0088] Explanation of icon numbers:

[0089]

[0090]

[0091] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0092] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0093] It should be noted that if the embodiments of the present invention involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0094] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. If the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0095] Power batteries can be categorized into primary batteries and rechargeable batteries based on whether they are rechargeable. Common types of rechargeable batteries include lead-acid batteries, nickel-metal hydride batteries, and lithium-ion batteries. Lithium-ion batteries are currently widely used in pure electric vehicles and hybrid vehicles. While lithium-ion batteries used in these applications have relatively lower capacity, they offer higher output and charging current, as well as a longer lifespan.

[0096] A lithium-ion battery is a complex system, comprising a casing and internal components such as the positive electrode, negative electrode, separator, current collector, binder, and conductive agent. The battery casing has injection holes for injecting electrolyte into the battery; the electrolyte conducts ions between the positive and negative electrodes. During charging and discharging, the reactions involved include electrochemical reactions at the positive and negative electrodes, lithium-ion and electron conduction, and heat dissipation. The manufacturing process of lithium batteries is lengthy, involving multiple steps.

[0097] Lithium batteries can be classified into cylindrical batteries, prismatic batteries, and pouch batteries according to their shape. Their manufacturing processes differ to some extent. Overall, the lithium battery manufacturing process can be divided into the front-end process (electrode manufacturing), the middle-end process (cell synthesis), and the back-end process (formation and packaging).

[0098] The lithium battery manufacturing process involves several steps requiring coating or film winding. These include external coating processes on the outer casing and film winding processes such as electrode winding during cell manufacturing. For ease of description, the aforementioned coatings or electrode materials with thin-film structures will be collectively referred to as films.

[0099] To facilitate the winding of the film, in some scenarios, workers need to bond and fix the ends of the film to the roll so that the ends of the film can be fixed on the roll, and then wind the film onto the roll.

[0100] When using adhesive bonding processes, a large amount of adhesive or tape is required to fix the film layer, resulting in waste of bonding materials. Because the film layer needs to be connected to the roll, the total length of the bonding area using adhesive materials such as tape cannot be too short to prevent the film layer from detaching. This results in the adhesive occupying a large portion of the film layer, leading to waste. Furthermore, since the tape contains glue, the glue adheres to the roll, easily causing roll contamination.

[0101] Please see Figure 1 and Figure 2 This invention addresses the problem of waste of adhesive material and film layer 100 caused by the adhesive bonding method used in existing rolls for fixing the film layer 100, and proposes a roll for clamping the film layer 100. The roll includes a cylinder 20 and a clamping assembly 30 disposed on the cylinder 20. The cylinder 20 has a first clamping surface 21. The clamping assembly 30 is movable between a closed position and an open position. The clamping assembly 30 has a second clamping surface 32. When the clamping assembly 30 is in the open position, a gap is formed between the first clamping surface 21 and the second clamping surface 32 for at least part of the film layer 100 to enter between them. When the clamping assembly 30 is in the closed position, the first clamping surface 21 and the second clamping surface 32 are clamped together.

[0102] The cylinder 20 is cylindrical, and the cylinder 20 has the following characteristics: Figure 2 The circular outer peripheral wall shown is such that when the film layer 100 is wound around the cylinder 20, the film layer 100 is wound around the axis of the cylinder 20. The cylinder 20 is provided with a first clamping surface 21. When the film layer 100 is wound around the cylinder 20, at least part of the end of the film layer 100 is pressed against the first clamping surface 21 by the action of the second clamping surface 32.

[0103] The clamping assembly 30 is connected to the cylinder 20 and is movable between an open position and a closed position. The clamping assembly 30 has a second clamping surface 32. The film layer 100 has an end portion for engaging with the clamping assembly 30. The open position refers to a gap between the second clamping surface 32 of the clamping assembly 30 and the first clamping surface 21 of the cylinder 20, the width of which is slightly greater than the thickness of the end portion of the film layer 100, allowing the film layer 100 to enter between the first clamping surface 21 and the second clamping surface 32. The closed position refers to a small distance between the first clamping surface 21 and the second clamping surface 32, allowing them to clamp tightly together; or, a gap exists between the first clamping surface 21 and the second clamping surface 32, the thickness of which is less than the thickness of the film layer 100.

[0104] The clamping assembly 30 is movable relative to the cylinder 20, allowing the distance between the second clamping surface 32 of the clamping assembly 30 and the first clamping surface 21 of the cylinder 20 to be adjustable. The clamping assembly 30 can switch between an open position and a closed position, allowing the gap between the first clamping surface 21 and the second clamping surface 32 to change as the clamping assembly 30 moves. When the clamping assembly 30 is in the open position, the gap between the first clamping surface 21 and the second clamping surface 32 is sufficient for the film layer 100 to be placed between them. When the clamping assembly 30 moves the film layer 100 synchronously to the closed position, the distance between the second clamping surface 32 and the first clamping surface 21 decreases until the film layer 100 is clamped between the first clamping surface 21 and the second clamping surface 32.

[0105] When the film layer 100 is not wound on the cylinder 20, the clamping assembly 30 is in the closed position, the first clamping surface 21 and the second clamping surface 32 are in close contact with each other, or the width of the gap between the first clamping surface 21 and the second clamping surface 32 is at its minimum.

[0106] Because the movable clamping assembly 30 limits the position of the film layer 100, the film layer 100 is clamped to the outer wall of the cylinder 20, eliminating the need for additional adhesive structures such as tape to fix the film layer 100, thus avoiding waste of materials such as tape. Since only a partial structure at the end of the film layer 100 needs to be clamped between the first clamping surface 21 and the second clamping surface 32, the parts of the film layer 100 that are not in contact with the clamping assembly 30 remain unaffected, thus avoiding waste of the film layer 100 caused by existing long-distance tape bonding processes. Since materials containing adhesive are not required, contamination of the roll or the film layer 100 can be avoided.

[0107] In some examples, the clamping assembly 30 is used to clamp partial structures at the ends of the film layer 100. For example, the clamping assembly 30 clamps and fixes both ends of the film layer 100 in the width direction between the first clamping surface 21 and the second clamping surface 32, or the clamping assembly 30 clamps the middle portion of the film layer 100 in the width direction between the first clamping surface 21 and the second clamping surface 32. In some examples, the clamping assembly 30 clamps the entire end of the film layer 100 between the first clamping surface 21 and the second clamping surface 32. The first clamping surface 21 and the second clamping surface 32 extend along the width direction of the film layer 100 so that the entire end of the film layer 100 is located between the first clamping surface 21 and the second clamping surface 32.

[0108] In some examples, the first clamping surface 21 is a local location on the circular outer peripheral wall of the cylinder 20. In some examples, a groove is recessed on the outer peripheral wall of the cylinder 20, and the first clamping surface 21 is formed in the groove. In some examples, a protruding structure is protruding on the outer peripheral wall of the cylinder 20, and the first clamping surface 21 is a portion of the surface of the protruding structure.

[0109] In some examples, a groove is recessed on the outer peripheral wall of the cylinder 20, and a first clamping surface 21 is formed in the groove. When the clamping assembly 30 is in the closed position, the second clamping surface 32 of the clamping assembly 30 is located in the groove. When projected in a plane perpendicular to the axial direction of the cylinder 20, the clamping assembly 30 can be located inside the outer peripheral edge of the cylinder 20 so that the clamping assembly 30 does not protrude outside the outer peripheral wall of the cylinder 20.

[0110] In some examples, the cylinder 20 has a hollow structure to reduce its weight and the amount of material required. The hollow portion of the cylinder 20 can be located in the middle of the cylinder 20, i.e., as shown below. Figure 2 As shown, the cylinder 20 is provided with a hollow part 23. In order to keep the center of gravity of the cylinder 20 consistent with its axis, the length direction of the hollow part 23 extends along the axial direction of the cylinder 20, and the hollow part 23 coincides with the axis of the cylinder 20.

[0111] Please see Figure 2 , Figure 3 and Figure 4 In some examples, the clamping assembly 30 includes a pressure bar 31 and a connecting rod 33. The pressure bar 31 has a second clamping surface 32. The connecting rod 33 is movably disposed in the cylinder 20 and connected to the pressure bar 31 so that the connecting rod 33 can drive the pressure bar 31 to move between a closed position and an open position.

[0112] The pressure bar 31 is used to cooperate with the cylinder 20 to clamp the film layer 100; the connecting rod 33 is used to drive the pressure bar 31 to move relative to the cylinder 20 so that the pressure bar 31 can move between the closed position and the open position, thereby enabling the pressure bar 31 to clamp the film layer 100 and fix the film layer 100 on the roll.

[0113] The connecting rod 33 is movably connected to the cylinder 20 so that the connecting rod 33 can move along a preset trajectory. When the connecting rod 33 moves along the preset trajectory, the connecting rod 33 drives the pressure bar 31 to move synchronously so that the pressure bar 31 can switch between the open position and the closed position along the preset trajectory.

[0114] The preset trajectory can be the radial direction of the cylinder 20, that is, the preset trajectory is a straight line; for example... Figure 2 As shown in the example, the pressure bar 31 moves from the outer peripheral wall of the drum along the radial direction of the drum body 20 away from the outer peripheral wall of the drum body 20 to switch to the open position, and moves along the radial direction of the drum body 20 towards the outer peripheral wall of the drum body 20 to switch to the closed position. In some examples, the preset trajectory can also be a curve or a broken line, so that the pressure bar 31 can move relatively closer to or away from the outer peripheral wall of the drum body 20.

[0115] In some examples, a drive device is provided on the cylinder 20 for driving the connecting rod 33 to move along a preset trajectory. When the connecting rod 33 moves relative to the cylinder 20, a cylinder, a motor, or other structure capable of driving the movement of the connecting rod 33 can be used as the drive device.

[0116] Please refer to the following: Figure 5 , Figure 6 as well as Figure 7 In some examples, the cylinder 20 is provided with a guide hole 22, one end of which extends through to the outer peripheral wall of the cylinder 20; the connecting rod 33 is provided through the guide hole 22 and can reciprocate along the guide hole 22 so that the connecting rod 33 can drive the pressure bar 31 to move between the closed position and the open position.

[0117] The guide hole 22 has a first end that extends to the outer peripheral wall of the cylinder 20. The connecting rod 33 is inserted into the guide hole 22 from the first end of the guide hole 22 and can reciprocate along the axial direction of the guide hole 22 so as to drive the pressure bar 31 to switch between the open position and the closed position.

[0118] The guide hole 22 can be a blind hole or a through hole formed on the cylinder 20. When the cylinder 20 has the hollow portion 23 described in the above example, the guide hole 22 can communicate with the hollow portion 23.

[0119] By setting the guide hole 22, the connecting rod 33 can be limited so that the connecting rod 33 can move along the trajectory formed by the guide hole 22, thereby limiting the trajectory of the pressure bar 31, so that the pressure bar 31 can better cooperate with the cylinder 20, avoid misalignment between the first clamping surface 21 and the second clamping surface 32, and thus help improve the docking accuracy between the first clamping surface 21 and the second clamping surface 32.

[0120] Please see Figure 4 , Figure 8 as well as Figure 9 In some examples, the clamping assembly 30 also includes a first elastic element 35 disposed in the guide hole 22. The first elastic element 35 is connected to the cylinder 20 and the connecting rod 33 respectively, so as to generate an elastic pulling force for the connecting rod 33 into the guide hole 22.

[0121] One end of the first elastic element 35 is confined to the cylinder 20, and the other end of the first elastic element 35 is connected to the connecting rod 33, so that when the connecting rod 33 moves along the guide hole 22, the first elastic element 35 can generate an elastic traction force on the connecting rod 33. Under the elastic traction force of the first elastic element 35, the connecting rod 33 tends to move along the guide hole 22 towards the interior of the cylinder 20. Under the elastic traction force of the first elastic element 35, the pressure bar 31 tends to move towards the closed position, so that the second clamping surface 32 tends to clamp towards the first clamping surface 21, thereby enabling the pressure bar 31 to press the film layer 100 onto the cylinder 20.

[0122] Please continue reading. Figure 4 In some examples, the cylinder 20 has a hollow portion 23; one end of the guide hole 22 away from the outer peripheral wall of the cylinder 20 extends into the hollow portion 23; and the first elastic element 35 is connected to the inner wall surface of the hollow portion 23.

[0123] The guide hole 22 is a through hole formed on the cylinder 20, allowing the end of the connecting rod 33 away from the pressure bar 31 to extend to the hollow portion 23. The first elastic member 35 is connected to the inner wall surface of the hollow portion 23 for easy fixation. To avoid affecting the normal function of the cylinder 20, the inner diameter of the guide hole 22 on the cylinder 20 should not be too large. In some examples, the first elastic member 35 partially extends into the guide hole 22 and is connected to the connecting rod 33. By connecting the first elastic member 35 to the inner wall surface of the hollow portion 23, the first elastic member 35 can be fixed. Furthermore, by allowing the first elastic member 35 to partially extend along the guide hole 22 and connect to the connecting rod 33, the internal space of the guide hole 22 can be fully utilized. In some examples, the first elastic member 35 is connected to the end of the connecting rod 33 away from the pressure bar 31 to provide elastic traction for the connecting rod 33, and the first elastic member 35 does not occupy the internal space of the guide hole 22.

[0124] Please see Figure 4 and Figure 9 In some examples, the first elastic element 35 includes a connector 352 and a first spring 351 connected to the connector 352. The connector 352 is connected to the inner wall surface of the hollow part 23. One end of the first spring 351 is connected to the connector 352, and the other end is connected to the connecting rod 33.

[0125] The connector 352 is used to connect to the cylinder 20, and the first spring 351 is used to connect to the connecting rod 33 to facilitate the fixing of the first spring 351. Since the first spring 351 is telescopic and has a certain degree of flexibility, the connector 352 is provided on the inner wall of the hollow part 23 of the cylinder 20 to facilitate the fixing of the first spring 351 with variable properties.

[0126] When installing the first spring 351, the first spring 351 can be set along the axial direction of the guide hole 22 to make full use of the internal space of the guide hole 22; or the first spring 351 can be set on the inner wall surface of the hollow part 23 for easy installation.

[0127] Please see Figure 4 , Figure 8 and Figure 9 Furthermore, in some examples, the first spring 351 is sleeved on the periphery of the connecting rod 33 and extends along the length of the connecting rod 33.

[0128] The first spring 351 is sleeved on the outside of the connecting rod 33, so that the first spring 351 occupies the gap between the outer peripheral wall of the connecting rod 33 and the inner wall of the guide hole 22, thereby making full use of the internal space of the guide hole 22. Since the first spring 351 is sleeved on the periphery of the connecting rod 33, it can extend along the axial direction of the connecting rod 33, thereby limiting the first spring 351 and preventing the first spring 351 from being misaligned.

[0129] Please see Figure 4 In some examples, the connector 352 is sleeved on the periphery of the connecting rod 33, and the maximum outer diameter of the connector 352 is greater than the inner diameter of the guide hole 22.

[0130] The connector 352 has a through hole through which the connecting rod 33 passes. The inner diameter of the through hole in the connector 352 is larger than the outer diameter of the connecting rod 33, allowing the connecting rod 33 to move axially relative to the connector 352. By fitting the connector 352 onto the connecting rod 33, the connector 352 and the first spring 351 can be easily fixed. Because the maximum outer diameter of the connector 352 is larger than the inner diameter of the guide hole 22, the connector 352 cannot move into the guide hole 22, thus limiting the movement of the connector 352.

[0131] Furthermore, in some examples, a first limiting groove 24 is recessed on the inner wall surface of the hollow part 23, and one end of the guide hole 22 away from the outer peripheral wall of the cylinder 20 extends to the bottom of the first limiting groove 24; the connecting member 352 is provided in the first limiting groove 24.

[0132] The first limiting groove 24 is a recessed groove on the inner wall surface of the hollow portion 23. After the connector 352 is placed in the first limiting groove 24, the first limiting groove 24 blocks the connector 352, preventing the connector 352 from moving radially along the guide hole 22, thereby preventing misalignment of the connector 352. The connector 352 is fixed in the first limiting groove 24, preventing unnecessary movement of the connector 352 under the action of the first spring 351, thereby preventing the first elastic member 35 from falling off.

[0133] Please see Figure 4 and Figure 8 A limiting protrusion 334 is provided on the outer peripheral wall of the end of the connecting rod 33 near the pressure bar 31. The maximum outer peripheral diameter of the limiting protrusion 334 is greater than the inner diameter of the guide hole 22.

[0134] A limiting protrusion 334 protrudes from the outer peripheral wall of the connecting rod 33 so that when the connecting rod 33 is inserted into the guide hole 22, the limiting protrusion 334 cannot enter the guide hole 22. By limiting the maximum depth of the connecting rod 33 inserted into the guide hole 22 by the limiting protrusion 334, the connecting rod 33 cannot continue to move into the guide hole 22 when the second clamping surface 32 of the pressure bar 31 and the first clamping surface 21 of the cylinder 20 are clamped together, thus limiting the connecting rod 33 and the pressure bar 31.

[0135] The limiting protrusion 334 can be a protrusion provided on the outer peripheral wall of the connecting rod 33, or it can be a protruding ring surrounding the outer wall of the connecting rod 33.

[0136] Please see Figure 4 and Figure 7 In some examples, a second limiting groove 25 is provided on the outer peripheral wall of the cylinder 20, and one end of the guide hole 22 away from the outer peripheral wall of the cylinder 20 extends to the bottom of the second limiting groove 25; when the pressure bar 31 is in the closed position, the limiting protrusion 334 is embedded in the second limiting groove 25.

[0137] The second limiting groove 25 is recessed into the outer peripheral wall of the cylinder 20. Since the limiting protrusion 334 is located at the end of the connecting rod 33 near the pressure bar 31, the second limiting groove 25 is used to accommodate the limiting protrusion 334. When the second clamping surface 32 of the pressure bar 31 and the first clamping surface 21 of the cylinder 20 are clamped together, the limiting protrusion 334 is located in the second limiting groove 25 so that the limiting protrusion 334 will not affect the pressure bar 31.

[0138] Furthermore, in some examples, the end of the first spring 351 away from the connector 352 is connected to the limiting protrusion 334.

[0139] Since the spring can extend axially along the guide hole 22, the end of the first spring 351 away from the connector 352 can be fixed by the limiting protrusion 334, which facilitates the mutual fixation between the first spring 351 and the connecting rod 33 and facilitates the installation of the first elastic member 35.

[0140] In some examples, the clamping assembly 30 also includes a first drive member (not shown) that is driven to the end of the link 33 away from the pressure bar 31 for driving the link 33 to move the pressure bar 31 between a closed position and an open position.

[0141] In some examples, the first driving element is a cylinder or an air shaft, which drives the connecting rod 33 to move axially along the guide hole 22, thereby enabling the pressure bar 31 to move between the closed position and the open position.

[0142] The first driving member can be disposed in the hollow portion 23 of the cylinder 20, or at any position on the cylinder 20 that can be driven and connected to the connecting rod 33. When the connecting rod 33 is driven to move by the first driving member, the connecting rod 33 stretches the first elastic member 35, so that the connecting rod 33 is subjected to the elastic traction force of the first elastic member 35, thereby causing the connecting rod 33 and the pressure bar 31 to tend to move towards the closed position. When the force exerted by the first driving member on the connecting rod 33 disappears, under the action of the first elastic member 35, the connecting rod 33 drives the pressure bar 31 to move towards the closed position, thereby elastically clamping the film layer 100 between the first clamping surface 21 and the second clamping surface 32 to achieve the fixation of the film layer 100.

[0143] When the connecting rod 33 has the limiting protrusion 334 described in the above example, the force exerted by the first driving member on the connecting rod 33 disappears, and the connecting rod 33 moves into the guide hole 22 under the elastic force of the first elastic member 35. When the limiting protrusion 334 abuts against the bottom of the second limiting groove 25, the pressure bar 31 reaches the closed position, and the first clamping surface 21 and the second clamping surface 32 clamp the film layer 100.

[0144] Please see Figure 5 , Figure 6 and Figure 7 Furthermore, in some examples, a positioning groove 27 is recessed on the outer peripheral wall of the cylinder 20, and a first clamping surface 21 is formed in the positioning groove 27.

[0145] In such Figure 2In the illustrated state, the distance between the end of the pressure bar 31 furthest from the axis of the cylinder 20 and the axis of the cylinder 20 is the first distance. The positioning groove 27 is a recessed groove on the outer peripheral wall of the cylinder 20. When the pressure bar 31 is in the closed position, the pressure bar 31 is at least partially located in the positioning groove 27, so that the difference between the first distance and the radius of the annular surface where the outer peripheral wall of the cylinder 20 is located is relatively smaller. Since the film layer 100 is wound on the outer peripheral wall of the cylinder 20, by setting the positioning groove 27, when the pressure bar 31 is in the closed position, the portion of the pressure bar 31 protruding onto the outer peripheral wall of the cylinder 20 is less, thereby avoiding pushing out the film layer 100 wound on the cylinder 20 and avoiding damage to the film layer 100 wound on the cylinder 20.

[0146] Furthermore, in some examples, the guide hole 22 extends through the positioning groove 27. The connecting rod 33 is inserted into the cylinder 20 through the positioning groove 27 and the guide hole 22 in sequence, so that the connecting rod 33 can drive the pressure bar 31 to switch between the closed and open positions. When the guide hole 22 extends through the positioning groove 27, the pressure bar 31 is in the closed position, and the connecting rod 33 is completely hidden in the positioning groove 27, thereby preventing the connecting rod 33 from affecting the membrane layer 100 wound on the cylinder 20, preventing mutual interference between the connecting rod 33 and the membrane layer 100, and thus preventing damage to the membrane layer 100. When installing the first driving member, the driving end of the first driving member can be inserted into the guide hole 22 and then connected to the connecting rod 33; or, the end of the connecting rod 33 away from the pressure bar 31 can protrude outside the end of the guide hole 22 away from the positioning groove 27 and be connected to the first driving member; when using a structure such as an air expansion shaft, the driving of the connecting rod 33 can be easily realized.

[0147] Please see Figure 10 , Figure 11 as well as Figure 12 In some examples, the connecting rod 33 has a proximal end for connecting to the pressure bar 31 and a distal end away from the pressure bar 31; a positioning shaft (not shown) is provided on the cylinder 20, and the connecting rod 33 is rotatably connected to the positioning shaft, which is located between the proximal and distal ends of the connecting rod 33; the drum also includes a second elastic element 36; the distal end of the connecting rod 33 is connected to the cylinder 20 through the second elastic element 36 so that the second elastic element 36 generates a pulling force that pulls the proximal end of the connecting rod 33 and the pressure bar 31 toward the first clamping surface 21.

[0148] Please refer to the following: Figure 13 , Figure 14 and Figure 15The positioning shaft is connected to the cylinder 20, and the connecting rod 33 is rotatably connected to the positioning shaft so that the connecting rod 33 can rotate around the positioning shaft. "Near" and "far" refer to the distance between any part of the connecting rod and the pressure bar 31. The near end of the connecting rod 33 is used to connect to the pressure bar 31, and the far end of the connecting rod 33 is used to connect to the second elastic element 36. Under the action of the positioning shaft, the connecting rod 33 forms a lever-like structure with the positioning shaft as the rotation center. When the connecting rod 33 performs a squeezing or stretching operation on the second elastic element 36, under the elastic action of the second elastic element 36, the connecting rod 33 rotates around the positioning shaft, causing the pressure bar 31 installed at the far end of the connecting rod 33 to move synchronously, thereby realizing the switching of the pressure bar 31 between the closed and open positions.

[0149] The second elastic element 36 can be a compression spring, which achieves relative rotation of the connecting rod 33 through elastic deformation. In this example, a drive mechanism can be provided on the cylinder 20 to drive the connecting rod 33 to rotate around the positioning axis.

[0150] Since the connecting rod 33 can drive the pressure bar 31 to move relative to each other, the pressure bar 31 can move towards the closed position under the action of the second elastic member 36, thereby clamping the film layer 100 between the second clamping surface 32 and the first clamping surface 21.

[0151] Furthermore, in some examples, the clamping assembly 30 also includes a second drive member (not shown in the figure), which is driven to the distal end of the connecting rod 33 and is used to drive the connecting rod 33 to rotate around the positioning axis. The second drive member can be a motor, cylinder, electric cylinder, or other device capable of driving the connecting rod 33 to rotate around the positioning axis. By driving the distal end of the connecting rod 33 to move relative to each other, the connecting rod 33 can drive the pressure lever 31 to move synchronously, realizing the movement switching of the pressure lever 31 between the open and closed positions, and at the same time realizing the automatic control of the pressure lever 31.

[0152] In some examples, the positioning shaft and the connecting rod 33 are positioned at both ends of the cylinder 20 in the axial direction so that the connecting rod 33 does not interfere with the membrane 100, thereby avoiding damage to the membrane 100 caused by the connecting rod 33 lifting the membrane 100.

[0153] Please see Figure 13 and Figure 14 Furthermore, in some examples, a third limiting groove 26 is recessed on the outer peripheral wall of the cylinder 20. When the pressure bar 31 moves to the closed position under the action of the connecting rod 33, the pressure bar 31 is at least partially embedded in the third limiting groove 26, thereby preventing the pressure bar 31 from protruding too much from the outside of the cylinder 20 and causing damage to the film layer 100. The third limiting groove 26 can be a through groove that runs radially through the outer peripheral wall of the cylinder 20, or it can be an inner groove recessed on the surface of the cylinder 20.

[0154] Please see Figure 16 , Figure 17 and Figure 18 In some examples, the clamping assembly 30 also includes a third driving member (not shown) disposed on the cylinder 20; the connecting rod 33 includes a rocker arm 331, a driving rod 332 and a driven rod 333, the rocker arm 331 being drivenly connected to the third driving member; the driving rod 332 being rotatably connected to the end of the rocker arm 331 away from the third driving member; one end of the driven rod 333 being rotatably connected to the cylinder 20, and the other end being connected to the pressure bar 31 and the end of the driving rod 332 away from the rocker arm 331; the third driving member is used to drive the rocker arm 331, the driving rod 332 and the rocker arm 331 to move the pressure bar 31 between an open position and a closed position.

[0155] The rocker arm 331, the driving lever 332, and the driven lever 333 are combined to form a multi-link mechanism. When the rocker arm 331 is driven to rotate by the third driving member, the multi-link mechanism moves synchronously, enabling the multi-link mechanism to drive the pressure lever 31 to move and switch between the open and closed positions.

[0156] In this example, the third driving component can be a motor, a cylinder, or other device capable of driving the rocker arm 331 to rotate relative to each other. By using the third driving component to drive the pressure bar 31 to move relative to each other, the pressure bar 31 can move relative to each other along a preset trajectory, thereby achieving the positioning and clamping of the film layer 100.

[0157] Furthermore, in some examples, the cylinder 20 is recessed with a third limiting groove 26, and the inner wall surface of the third limiting groove 26 forms a first clamping surface 21; the connecting rod 33 is located at both ends of the cylinder 20 in the axial direction.

[0158] The third limiting groove 26 forms a space for accommodating the pressure bar 31, so that when the pressure bar 31 is in the closed position, the pressure bar 31 is at least partially located within the third limiting groove 26. This reduces the height of the pressure bar 31 protruding from the outer peripheral wall of the cylinder 20, thereby preventing damage to the membrane layer 100 caused by the pressure bar 31 lifting the membrane layer 100 when it protrudes from the outer peripheral wall of the cylinder 20. Since the connecting rod 33 is located at both ends of the axial direction of the cylinder 20, it can improve the stability of the pressure bar 31, while avoiding interference between the connecting rod 33 and the membrane layer 100, thus preventing the connecting rod 33 from damaging the membrane layer 100.

[0159] Please see Figure 19 and Figure 20Based on the above example of a roll, this example also proposes an example of a film winding device. The film winding device is used to wind a film layer 100 and includes a main winding member 10, an auxiliary shaft 11, and a roll as described in any of the above examples. The main winding member 10 is used to wind the film layer 100; the roll is disposed adjacent to the main winding member 10 as described in any of the above examples; the auxiliary shaft 11 is movably disposed between the main winding member 10 and the roll; the auxiliary shaft 11 is used to push the film layer 100 output from the main winding member 10 against the cylinder 20, so that the film layer 100 can be fitted into the gap between the first clamping surface 21 and the second clamping surface 32.

[0160] The film layer 100 to be processed is wound on the main winding member 10, and the conveying direction of the film layer 100 is controlled by the auxiliary shaft 11. There can be multiple auxiliary shafts 11 to adjust the conveying direction of the film layer 100.

[0161] When the auxiliary shaft 11 moves to a position close to the cylinder 20, the auxiliary shaft 11 drives the membrane layer 100 to move synchronously to the cylinder 20, so as to push the membrane layer 100 against the cylinder 20. When the clamping assembly 30 moves to the open position, along as... Figure 21 The cutting position shown cuts the film layer 100. Under the pressure of the auxiliary shaft 11, the end of the film layer 100 extends into the gap between the first clamping surface 21 and the second clamping surface 32. The clamping assembly 30 is switched to the closed position so that the film layer 100 is clamped between the first clamping surface 21 and the second clamping surface 32, thereby fixing the end of the film layer 100 on the cylinder 20. After the end of the film layer 100 is fixed on the cylinder 20, the cylinder 20 can be rotated by other equipment, thereby winding the film layer 100 onto the cylinder 20.

[0162] It is worth noting that since the examples of the film winding device of the present invention are based on the above-mentioned examples of the roll, the examples of the film winding device of the present invention include all the technical solutions of all the above-mentioned examples of the roll, and the technical effects achieved are exactly the same, so they will not be repeated here.

[0163] Based on the above-described film winding apparatus, this example also provides an example of a battery processing system, which includes the film winding apparatus as described in the above example.

[0164] Please refer to the following: Figures 1 to 22In some examples, the reel has a body 20 and a clamping assembly 30, which includes a link 33 and a drive mechanism for moving the link 33 along a preset trajectory. The clamping assembly 30 is movable between an open position and a closed position, such that when the clamping assembly 30 is in the open position, the end of the film layer 100 can extend between the first clamping surface 21 and the second clamping surface 32; when the clamping assembly 30 is switched to the closed position, the first clamping surface 21 and the second clamping surface 32 clamp each other, so that the film layer 100 is clamped and fixed in the gap between the first clamping surface 21 and the second clamping surface 32, thereby fixing the end of the film layer 100 to the body 20. Since the clamping assembly 30 is used to fix the membrane layer 100, there is no need to use existing devices such as tape for fixation, thereby reducing the use of tape and other resources. Since the tape contains adhesive, the adhesive adheres to the outer peripheral wall of the cylinder 20, which can easily affect the surface of the cylinder 20 and affect the secondary use of the cylinder 20. In this example, the clamping assembly 30 is used to clamp and fix the membrane layer 100, which can reduce the impact on the cylinder 20 and prevent the cylinder 20 from being contaminated by adhesive and other impurities.

[0165] The above description is merely a preferred example of the present invention and does not limit the patent scope of the present invention. All equivalent structural transformations made using the contents of the present invention's specification and drawings under the inventive concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A roll for holding a film layer, characterized in that, The reel includes: A cylindrical body, the cylindrical body having a first clamping surface; and A clamping assembly is movably disposed on the cylinder between a closed position and an open position; the clamping assembly has a second clamping surface; when the clamping assembly is in the open position, a gap is formed between the first clamping surface and the second clamping surface for allowing at least a portion of the film layer to enter between them; when the clamping assembly is in the closed position, the first clamping surface and the second clamping surface are clamped together. The clamping assembly includes a pressure bar, a connecting rod, and a third driving member disposed on the cylinder. The pressure bar forms the second clamping surface. The connecting rod is movably disposed on the cylinder and includes a rocker arm, a driving rod, and a driven rod. The rocker arm is drivenly connected to the third driving member. The driving rod is rotatably connected to the end of the rocker arm away from the third driving member. One end of the driven rod is rotatably connected to the cylinder, and the other end is connected to the pressure bar and the end of the driving rod away from the rocker arm. The third driving member is used to drive the rocker arm, the driving rod, and the rocker arm to move the pressure bar between the open position and the closed position.

2. The reel as described in claim 1, characterized in that, The cylinder is recessed with a third limiting groove, and the inner wall surface of the third limiting groove forms the first clamping surface; the connecting rod is located at both ends of the cylinder in the axial direction.

3. A film winding device for winding a film, characterized in that, The film winding device includes: Main winding member, used to wind the film layer; The reel as described in claim 1 or 2, disposed adjacent to the main winding member; and An auxiliary shaft is movably disposed between the main winding member and the drum; the auxiliary shaft is used to push the film layer output by the main winding member against the drum body so that the film layer can be embedded in the gap between the first clamping surface and the second clamping surface.

4. A battery processing system, characterized in that, Includes the film winding device as described in claim 3.

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