Strip threading device and method for splicing strip by adopting strip threading device

Abstract

The embodiment of the invention provides a strip threading device and a method for splicing a strip by adopting the strip threading device, and the strip threading device comprises a sliding rail which is arranged along a conveying path of the strip; the sliding rod device is detachably connected to the sliding track; and the traction body can slide along the sliding track. By adopting the belt threading device, the belt can be spliced after the belt is broken.

Description

Belt threading device and belt splicing method using the same Technical Field

[0001] The present application relates to the field of battery manufacturing, and in particular to a tape threading device and a tape splicing method using the tape threading device. Background Art

[0002] The production process of the battery may include a pole piece manufacturing process; in the pole piece manufacturing process, the strip needs to be transferred from the unwinding device to the rewinding device. During the transfer process, the strip may break, and in this case, the strip needs to be spliced.

[0003] Typically, the devices used to splice the strips use chains, wire ropes, belts, synchronous belts, etc., which are complex in structure and high in cost. Therefore, there is an urgent need to improve the efficiency of battery production.

[0004] Summary of the Invention

[0005] The present application provides a tape threading device and a method for splicing tapes using the tape threading device. The tape threading device has a simple structure and low cost, and the tape splicing operation using the tape threading device is convenient, which can improve the efficiency of battery production.

[0006] In a first aspect, a belt threading device is provided, which includes: a sliding track, which is arranged along the conveying path of the strip; a sliding rod device, which is detachably connected to the sliding track; and a traction body, which can slide along the sliding track.

[0007] In the technical solution of this application, a sliding track is provided along the strip conveying path, a slide rod device is provided that is detachably connected to the slide rail, and a traction body is provided that can slide along the slide rail. This allows the strip to be spliced ​​in the event of a strip break. The slide rail is integrated into the strip conveying path, and the slide rod device can be detachably connected to any position on the slide rail, allowing splicing at any time. This simple structure and easy operation can improve the production efficiency of pole pieces, and further improve the production efficiency of batteries.

[0008] In some possible implementations, the sliding track includes a first track and a second track that are arranged opposite to each other.

[0009] In the above embodiment, the conveying direction of the strip is limited by setting the sliding track including the first track and the second track arranged opposite to each other. The overall structure is symmetrical. When the strip is conveyed, the force on the strip is uniform, which can better achieve the strip connection.

[0010] In some possible implementations, the first track and / or the second track is a hollow sealed track, and the traction body is configured to slide in the sealed track.

[0011] In the above embodiment, the weight of the track is reduced by using the hollow sealed track as the sliding track, and the traction body is arranged in the sealed track, which reduces the space occupied by the belt threading device.

[0012] In some possible implementations, the sealing track is connected to an air pressure control device, so that the traction body slides in the sealing track under the action of an air pressure difference.

[0013] The above embodiment connects the sealing track with the air pressure control device, utilizes the air pressure difference in the sealing track to push the traction body, thereby further pushing the slide rod device to slide along the sliding track, avoiding the setting of an additional traction device, simplifying the structure, and reducing the weight of the belt threading device.

[0014] In some possible implementations, the traction body is magnetically connected to the slide bar device to pull the slide bar device.

[0015] The above embodiment, by providing a magnetic connection between the traction body and the slide rod device, can drive the slide rod device to slide without direct contact between the traction body and the slide rod device, thus avoiding additional connection structure, having a simple structure and being easy to implement.

[0016] In some possible embodiments, when the sealing track is a sealed circular tube, the traction body includes a cylindrical magnetic ball and a sealing ring, the diameter of the magnetic ball is smaller than the inner diameter of the sealed circular tube, and the sealing ring is sleeved on the surface of the magnetic ball to seal the gap between the magnetic ball and the sealed circular tube.

[0017] In the above embodiment, by setting the traction body to include a magnetic ball and a sealing ring, the attraction force between the magnetic ball and the sliding rod device can be made greater, the magnetic connection between the two can be better realized, and the gas at both ends of the traction body can be isolated, so that the air pressure difference at both ends can be different. Under the action of the air pressure difference, the traction body can slide along the sealed circular tube.

[0018] In some possible implementations, the difference between the diameter of the magnetic ball and the inner diameter of the sealed circular tube is 1-3 mm.

[0019] The above embodiment limits the difference between the diameter of the magnetic ball and the inner diameter of the sealed circular tube, so that there is a certain gap between the two. When the magnetic ball passes through a position with a smaller bending radius of the sealed circular tube, it can ensure that the magnetic ball turns smoothly while ensuring that the magnetic force between the magnetic ball and the slide rod device is strong and the magnetic connection is stable, thereby improving the threading / connecting efficiency of the entire threading device.

[0020] In some possible implementations, the length of the magnetic ball along the conveying direction of the strip is 40-100 mm.

[0021] The above embodiment provides an optimized length value of the magnetic ball by limiting the length of the magnetic ball, which can achieve a strong magnetic connection between the magnetic ball and the slide rod device while enabling the magnetic ball to slide smoothly in the sealed circular tube.

[0022] In some possible implementations, both ends of the magnetic ball along the conveying direction of the strip have rounded corners.

[0023] In the above embodiment, by setting the two ends of the magnetic ball to have a rounded structure, it can be ensured that the magnetic ball passes smoothly when it slides through the minimum turning radius in the sliding track.

[0024] In some possible implementations, the sliding rod device includes a connecting rod and a slider mechanism, an end portion of the connecting rod is connected to the slider mechanism, and the slider mechanism is slidably connected to the sliding track.

[0025] In the above embodiment, the slide rod device is limited to the slide track, and the sliding of the slide rod device can be achieved through the slider mechanism, which has a simple structure and is easy to implement.

[0026] In some possible implementations, the slider mechanism is provided with a mounting groove, and the end of the connecting rod is disposed in the mounting groove to be connected to the slider mechanism.

[0027] In the above embodiment, by providing an installation groove for installing the connecting rod end on the slider mechanism, the connecting rod can be connected to the slider mechanism, and the connecting rod and the slider mechanism are detachable, so that the slide rod device can be easily connected to any position of the slide track, with a simple structure and easy operation.

[0028] In some possible implementations, the slider mechanism includes a pressing block for pressing the end of the connecting rod in the mounting groove after the end of the connecting rod is disposed in the mounting groove.

[0029] In the above embodiment, the connecting rod is pressed by the pressing block, so that the connection between the connecting rod and the slider mechanism is more secure, and this connection method has a simple structure and is easy to operate.

[0030] In some possible implementations, the surface where the end of the connecting rod contacts the pressing block is a plane.

[0031] In the above embodiment, the flat surface enables the pressing block to better press the end of the connecting rod, resulting in a tighter connection.

[0032] In some possible implementations, the slider mechanism further includes a fixing member for fixing the pressing block.

[0033] In the above embodiment, the pressing block is fixed by the fixing member, so that the connecting rod can be fixed to the slider mechanism, and the two can be detached, the structure is simple, and the installation and disassembly operations are easy.

[0034] In some possible implementations, the slider mechanism is provided with a sliding groove, and the slider mechanism is slidably connected to the sliding track through the sliding groove.

[0035] In the above embodiment, the slider mechanism is limited to the slide track by setting the slide groove, and the slide rod device is further limited in the slide track, thereby simplifying the connection method between the slide rod device and the slide track, and the structure is simple and easy to implement.

[0036] In some possible implementations, the slider mechanism includes a guide device. When the sliding track is accommodated in the sliding groove, the guide device abuts against the sliding track to limit the slider mechanism.

[0037] In the above embodiment, by providing a guide device in the slider mechanism, the slider mechanism can be limited, so that the sliding direction of the slider mechanism can be limited, which facilitates the operation of threading or connecting the belt.

[0038] In some possible embodiments, the guide device includes a ball, a spring and an adjusting screw, the ball abuts against the sliding track to enable the slider mechanism to slide along the sliding track, the spring abuts against the ball, and the adjusting screw is used to adjust the deformation of the spring to adjust the relative position of the slider mechanism and the sliding track.

[0039] In the above embodiment, by setting up a guide device including balls, springs and adjusting top screws, there is rolling friction between the slider structure and the sliding track, and the friction force is relatively small. The position of the slider mechanism relative to the sliding track is adjusted by the spring, so that the relative position, friction force, etc. between the slide rod device and the sliding track can be adjusted to better realize the threading or splicing of the strip.

[0040] In some possible implementations, the slider mechanism includes four guide devices, and the four guide devices are symmetrically arranged.

[0041] In the above embodiment, by symmetrically arranging the four guide devices, the slider mechanism can be limited in the three directions of x, y, and z, and the positioning of the slide rod device can be achieved, which facilitates the operation of threading or connecting the belt.

[0042] In some possible implementations, a gap size between the sliding groove and the sliding track is 1-3 mm.

[0043] The above embodiment, by limiting the gap size between the slide groove and the slide track, can ensure that the slide rod device does not get stuck when passing through a position with a smaller bending radius of the slide track, while ensuring the stability of the magnetic connection between the slide rod device and the traction body, thereby improving the threading / connecting efficiency of the threading device.

[0044] In some possible implementations, both ends of the chute along the conveying direction of the strip have rounded corners.

[0045] In the above embodiment, by setting the two ends of the slide groove as a rounded structure, the slide rod device can slide through the smallest turning radius without getting stuck when sliding along the slide track.

[0046] In some possible implementations, the connecting rod is a hollow tube.

[0047] In the above embodiment, by setting the connecting rod as a hollow round tube, the weight of the connecting rod is reduced, thereby reducing the weight of the entire belt threading device, making operations such as belt threading or belt splicing easier.

[0048] In a second aspect, a method for splicing strips using a strip threading device is provided. The method can splice strips using the strip threading device described in the first aspect or any possible embodiment of the first aspect.

[0049] The technical solution of the present application uses the above-mentioned tape threading device to splice the tapes. The splicing method is simple and can quickly achieve the splicing of the tapes, thereby improving the production efficiency of the battery.

[0050] In some possible embodiments, the strip is broken into a first strip and a second strip, and along the conveying direction of the strip, the first strip is upstream of the second strip. The method includes: connecting the slide bar device to the sliding track and connecting the slide bar device to the second strip at the broken end of the second strip; driving the traction body to the broken end of the second strip so that the traction body pulls the slide bar device to slide along the sliding track to the broken end of the first strip; and connecting the first strip and the second strip.

[0051] In the above embodiment, the first strip and the second strip are connected by the sliding track, the slide rod device and the traction body included in the strip threading device, and the broken strip at any position can be quickly connected. The connection operation is simple, thereby improving the battery production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0052] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments of the present application. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the drawings without creative work.

[0053] FIG1 is a schematic flow chart of a pole piece manufacturing process disclosed in one embodiment of the present application;

[0054] FIG2 is a schematic structural diagram of a belt threading device disclosed in one embodiment of the present application;

[0055] FIG3 is a schematic structural diagram of a traction body included in a belt threading device disclosed in one embodiment of the present application;

[0056] FIG4 is a structural diagram of a slide bar device included in a belt threading device disclosed in one embodiment of the present application;

[0057] FIG5 is a flow chart of a method for splicing a belt using a belt threading device according to an embodiment of the present application;

[0058] FIG6 is a flow chart of a method for splicing a belt using a belt threading device according to an embodiment of the present application;

[0059] In the drawings, the drawings are not drawn to scale.

[0060] Marking Description:

[0061] 20 Belt threading device

[0062] 21 Sliding Track

[0063] 22 Slider device

[0064] 23 Traction body

[0065] 21a First track

[0066] 21b Second track

[0067] 231 Magnetic Ball

[0068] 232 sealing ring

[0069] 222 connecting rod

[0070] 221 Slider Mechanism

[0071] 2211 mounting slot

[0072] 2212 Briquetting

[0073] 2213 Fixing parts

[0074] 2214 Chute

[0075] 2215 Guide device

[0076] 2215a Ball

[0077] 2215b Spring

[0078] 2215c Adjusting top screw

[0079] 30 Roller mechanism

[0080] 31 Roller DETAILED DESCRIPTION

[0081] The following detailed description of the embodiments of the present application is provided in conjunction with the accompanying drawings and examples. The following detailed description of the embodiments and the accompanying drawings are used to illustrate the principles of the present application, but are not intended to limit the scope of the present application, that is, the present application is not limited to the described embodiments.

[0082] In the description of this application, it should be noted that, unless otherwise specified, "multiple" means more than two; the terms "upper", "lower", "left", "right", "inside", "outside", etc., indicating directions or positional relationships, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on this application. In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. "Vertical" is not strictly perpendicular, but is within the allowable error range. "Parallel" is not strictly parallel, but is within the allowable error range.

[0083] The directional words appearing in the following description are all directions shown in the figures, and do not limit the specific structure of this application. In the description of this application, it should also be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0084] In the embodiments of this application, the same reference numerals represent the same components, and for the sake of brevity, detailed descriptions of the same components in different embodiments are omitted. It should be understood that the thickness, length, width, and other dimensions of the various components in the embodiments of this application, as well as the overall thickness, length, width, and other dimensions of the integrated device shown in the drawings are merely illustrative and should not constitute any limitation on this application.

[0085] In this application, batteries may include lithium-ion batteries, lithium-sulfur batteries, sodium-lithium-ion batteries, sodium-ion batteries, or magnesium-ion batteries, etc., and the embodiments of this application do not limit this. The battery cells encapsulated in the battery may be cylindrical, flat, rectangular, or other shapes, etc., and the embodiments of this application do not limit this. Battery cells are generally divided into three types based on the packaging method: cylindrical battery cells, prismatic battery cells, and soft-pack battery cells, and the embodiments of this application do not limit this.

[0086] The battery referred to in the embodiments of this application refers to a single physical module that includes one or more battery cells to provide higher voltage and capacity. For example, the battery referred to in this application may include a battery module or a battery pack. A battery generally includes a casing that encloses one or more battery cells. The casing prevents liquids or other foreign matter from affecting the charging or discharging of the battery cells.

[0087] A battery cell includes an electrode assembly and an electrolyte. The electrode assembly is composed of a positive electrode sheet, a negative electrode sheet, and a separator. The battery cell mainly relies on the movement of metal ions between the positive electrode sheet and the negative electrode sheet to work. The positive electrode sheet includes a positive electrode collector and a positive electrode active material layer. The positive electrode active material layer is coated on the surface of the positive electrode collector. The positive electrode collector not coated with the positive electrode active material layer protrudes from the positive electrode collector coated with the positive electrode active material layer. The positive electrode collector not coated with the positive electrode active material layer serves as the positive electrode tab. In addition, the electrode assembly can be a wound structure or a laminated structure, and the embodiments of the present application are not limited to this.

[0088] As shown in Figure 1, for example, the pole piece manufacturing process for battery production can be subdivided into processes such as slurry stirring 101, pole piece coating 102, pole piece rolling 103, pole piece stripping 104, and pole piece drying 105. Among them, the purpose of pole piece rolling is to make the active material itself and the current collector more closely assembled and the thickness more uniform, thereby improving the compaction density of the pole piece. As an important component of the battery cell, the pole piece's preparation efficiency is extremely important for the production and manufacturing of the battery cell. It is worth noting that the pole piece is a thin sheet structure, or it can be said that the pole piece is a thin sheet structure. In the preparation process of the pole piece, it is necessary to pass the thin sheet structure through the roller mechanism and gradually implement processes such as pole piece coating and pole piece rolling. However, when passing through the roller mechanism, due to the influence of multiple factors, the pole piece may break, and at this time, the broken strip needs to be connected.

[0089] In the electrode preparation process, a belt splicing device typically uses chains, wire ropes, belts, synchronous belts, etc. to splice or thread the belt. These splicing devices are complex and costly, cannot achieve long-distance closed-loop operation, require segmented setup, and occupy a large space. During operation, they can cause environmental pollution and generate metal particles due to friction. In the embodiments of this application, the splicing device may also be referred to as a threading device.

[0090] In view of this, the present application provides a strip threading device, comprising a sliding track, a slide rod device, and a traction body, wherein the sliding track is arranged along the conveying path of the strip, the slide rod device is detachably connected to the sliding track, the traction body can slide along the sliding track, and when the strip breaks, the strip threading device can be used to connect the broken parts of the strip to achieve strip splicing. The strip threading device provided in the present application can be integrated along the conveying path of the strip, and the strip can be spliced ​​when it breaks. The entire strip threading device is easy to use and can improve the production efficiency of the electrode.

[0091] The following is a detailed description of a belt threading device provided in an embodiment of the present application, exemplarily with reference to Figures 2-5.

[0092] Figure 2 shows a structural schematic diagram of a belt threading device provided in an embodiment of the present application, wherein Figure 2 (a) shows a three-dimensional view of a belt threading device provided in an embodiment of the present application, and Figure 2 (b) shows a side view of a belt threading device provided in an embodiment of the present application.

[0093] As shown in Figure 2, the belt threading device 20 includes a sliding track 21, a slide rod device 22 and a traction body 23 (not shown in Figure 2). The sliding track 21 is arranged along the conveying path of the strip, the slide rod device 22 is detachably connected to the sliding track 21, and the traction body 23 can slide along the sliding track.

[0094] It can be understood that one connection method of the various structures included in the above-mentioned belt threading device 20 can be: when the belt is broken into a first belt and a second belt, the slide rod device 22 is connected to the sliding track 21 at the broken belt end of the second belt, and connected to the second belt, the traction body 23 slides to the broken belt end of the second belt, and the traction slide rod device 22 slides along the sliding track 21 to the broken belt end of the first belt, so that the first belt and the second belt are connected, wherein, along the conveying direction of the belt, the first belt is upstream of the second belt.

[0095] Therefore, by providing a slide track 21 along the strip conveying path, providing a slide rod device 22 that can be detachably connected to the slide track 21, and providing a traction body 23 that can slide along the slide track 21, the strip can be spliced ​​in the event of a strip break. Thus, the slide track 21 is integrated along the strip conveying path, and the slide rod device 22 can be detachably connected to any position on the slide track 21, allowing splicing at any time. This simple structure and easy operation can improve the production efficiency of electrode sheets, and further improve the production efficiency of batteries.

[0096] It is worth noting that the sliding track 21 of the above-mentioned belt threading device 20 is set along the conveying path of the strip, and the conveying path of the strip can be achieved by setting a roller mechanism. For example, in Figure 2, the roller mechanism 30 includes multiple rollers 31, and the strip passes over the rollers 31 to achieve the conveyance of the strip from the unwinding device to the rewinding device. Regarding the unwinding device and the rewinding device, Figure 2 does not show them, and this application does not limit the specific structure of the unwinding device and the rewinding device. Optionally, the sliding track can be as close to the roller mechanism as possible, and the minimum turning radius of the sliding track can be 300mm.

[0097] It is also worth noting that the tape threading device 20 provided in the embodiment of the present application can not only be used to connect the tape after it breaks, but can also be used to transfer the tape from the unwinding device to the rewinding device in the initial stage, and the present application does not limit this.

[0098] It is also worth noting that the shape and structure of the strip conveying path can be of various types and are not limited to those shown in Figure 2. Depending on the strip conveying path, the shape of the slide track can also be varied. Furthermore, when the strip is conveyed through the roller mechanism, the rollers included in the roller mechanism can also have various shapes and structures, which is not limited in this application.

[0099] It is also worth noting that when the traction body 23 slides along the sliding track 21, the traction body 23 can be driven by a motor, or by air pressure, or by other driving methods, which is not limited in this application.

[0100] In the embodiment of the present application, the sliding track 21 shown in FIG2(a) may include a first track 21a and a second track 21b arranged opposite to each other. Optionally, the sliding track 21 may include one track or multiple tracks, which is not limited in the present application.

[0101] Therefore, by setting the sliding track 21 including the first track 21a and the second track 21b arranged relatively, the conveying direction of the strip is limited, the overall structure is symmetrical, and the force on the strip is uniform when conveying the strip, which can better achieve the strip connection.

[0102] In an embodiment of the present application, as shown in FIG2(a), the first track 21a and / or the second track 21b are hollow sealed tracks, and the traction body 23 is configured to slide within the sealed tracks. For example, the first track 21a and the second track 21b are both hollow sealed tracks. For another example, the first track 21a is a hollow sealed track, and the second track 21b is a solid sealed track. It is worth noting that when the sealed track is hollow, the inner wall of the sealed track can be circular, arc-shaped, rectangular, etc., and this application does not limit this.

[0103] Therefore, by using a hollow sealed rail as the sliding rail 21, the weight of the rail is reduced, and by arranging the traction body 23 in the sealed rail, the occupied space of the belt threading device is reduced.

[0104] Optionally, the sealing track is an integrated structure spliced ​​with hollow materials. The material of the sealing track can be non-magnetic materials such as stainless steel and Teflon, and this application does not limit this.

[0105] Optionally, the first track 21a and / or the second track 21b may not be a circular tube, but may be other shapes, for example, perpendicular to the sliding direction of the sliding track 21, and the cross-section of the first track 21a and / or the second track 21b may be an elliptical, polygonal or irregular shape, etc., which is not limited in this application.

[0106] In the embodiment of the present application, the sealing track may be connected to an air pressure control device so that the traction body 23 slides in the sealing track under the action of the air pressure difference.

[0107] Optionally, the air pressure control device may include a proportional valve and an air circuit control panel.

[0108] Therefore, the air pressure difference is used in the sealed track to push the traction body 23, thereby further pushing the slide rod device 22 to slide along the slide track 21, avoiding the provision of an additional traction device, simplifying the structure, and reducing the weight of the belt threading device.

[0109] Optionally, the sealing track may be a sealing circular tube. Optionally, the outer diameter of the sealing circular tube may be 20-50 mm, such as 20 mm, 25 mm, 30 mm, 35 mm, 40 mm, 45 mm, and 50 mm, and the inner diameter may be 16-46 mm, such as 16 mm, 21 mm, 26 mm, 31 mm, 36 mm, 41 mm, and 46 mm. By limiting the size of the sealing circular tube, it is possible to ensure that the sealing circular tube has a certain strength while not occupying too much space.

[0110] The structure of the traction body 23 included in the belt threading device 20 provided in the embodiment of the present application is described below by way of example with reference to FIG3 , wherein FIG3 (a) shows a stereoscopic view of the traction body 23 , and FIG3 (b) shows a front view of the traction body 23 .

[0111] In the embodiment of the present application, the traction body 23 is magnetically connected to the slide bar device 22 to pull the slide bar device 22. As shown in FIG3 , the second track 21 b is a hollow, sealed track, and the traction body 23 can be disposed in the second track 21 b and magnetically connected to the slide bar device 22, so that the slide bar device 22 can slide when the traction body 23 slides.

[0112] Optionally, the sliding rod device and the traction body may be connected in other ways, which is not limited in this application.

[0113] Therefore, by setting up a magnetic connection between the traction body 23 and the slide rod device 22, the traction body 23 and the slide rod device 22 do not need to be in direct contact, and the slide rod device 22 can be driven to slide, avoiding an additional connection structure, and the structure is simple and easy to implement.

[0114] In an embodiment of the present application, as shown in Figure 3, when the sealing track is a sealed circular tube, the traction body 23 may include a cylindrical magnetic ball 231 and a sealing ring 232. The diameter of the magnetic ball 231 is smaller than the inner diameter of the sealed circular tube. The sealing ring 232 is sleeved on the surface of the magnetic ball 231 to seal the gap between the magnetic ball 231 and the sealed circular tube.

[0115] Optionally, an arc-shaped groove may be provided on the surface of the magnetic ball 231, and at least a portion of the sealing ring 232 is placed in the arc-shaped groove, thereby making the connection between the sealing ring 232 and the magnetic ball 231 tighter, thereby avoiding the situation where the sealing ring 232 and the magnetic ball 231 are separated when the traction body 23 slides.

[0116] Therefore, by setting the traction body 23 to include a magnetic ball 231 and a sealing ring 232, the attraction force between the magnetic ball 231 and the sliding rod device 22 can be made greater, the magnetic connection between the two can be better realized, and the gas at both ends of the traction body 23 can be isolated, so that the air pressure difference at the two ends can be different. Under the action of the air pressure difference, the traction body 23 can slide along the sealed circular tube.

[0117] Optionally, the difference between the diameter of the magnetic ball 231 and the inner diameter of the sealed circular tube is 1-3 mm, and the difference can be 1 mm, 1.5 mm, 2 mm, 2.5 mm, or 3 mm. Therefore, by limiting the difference between the diameter of the magnetic ball 231 and the inner diameter of the sealed circular tube, a certain gap is provided between the two. This ensures that the magnetic ball 231 can smoothly turn at a position where the bending radius of the sealed circular tube is small, while also ensuring that the magnetic force between the magnetic ball 231 and the slide rod device 22 is strong and the magnetic connection is stable, thereby improving the threading / connecting efficiency of the entire threading device 20.

[0118] Optionally, the length of the magnetic ball 231 along the conveying direction of the strip is 40-100 mm, for example, 60 mm. Therefore, by limiting the length of the magnetic ball 231, an optimized length value of the magnetic ball 231 is provided, which can achieve a strong magnetic connection between the magnetic ball 231 and the slide rod device 22 while allowing the magnetic ball 231 to slide smoothly within the sealed circular tube.

[0119] Optionally, the material of the magnetic ball 231 can be a strong magnetic material, such as a neodymium iron boron magnet, and the surface magnetic field strength can be 10,000-15,000 gauss, with the north pole and the south pole along the cylindrical axis of the magnetic ball 231.

[0120] Optionally, both ends of the magnetic ball 231 along the conveying direction of the strip have rounded corners, thereby ensuring that the magnetic ball 231 passes smoothly when it slides through the minimum turning radius in the sliding track 21 .

[0121] The following is an exemplary description of the slide bar device 22 provided in an embodiment of the present application with reference to FIG4 . FIG4 is a schematic structural diagram of the slide bar device 22 included in the belt threading device 20 provided in an embodiment of the present application, wherein FIG4 (a) shows a front view of the slide bar device 22, and FIG4 (b) shows a side view of the slide bar device 22.

[0122] In the embodiment of the present application, as shown in FIG4 , the slide rod device 22 includes a connecting rod 222 and a slider mechanism 221 . The end of the connecting rod 222 is connected to the slider mechanism 221 , and the slider mechanism 221 is slidably connected to the slide rail 21 .

[0123] Therefore, the slide rod device 22 is limited to the slide track 21, and the sliding of the slide rod device 22 can be achieved through the slider mechanism 221, which has a simple structure and is easy to implement.

[0124] In the embodiment of the present application, the slider mechanism 221 is provided with a mounting groove 2211 , and the end of the connecting rod 222 is disposed in the mounting groove 2211 to be connected to the slider mechanism 221 .

[0125] Therefore, by setting an installation groove 2211 for installing the end of the connecting rod 222 on the slider mechanism 221, the connecting rod 222 can be connected to the slider mechanism 221, and the connecting rod 222 and the slider mechanism are detachable, so that the slide rod device 22 can be easily connected to any position of the sliding track 21, with a simple structure and easy operation.

[0126] In the embodiment of the present application, the slider mechanism 221 may further include a pressing block 2212 , which is used to press the end of the connecting rod 222 in the mounting groove 2211 after the end of the connecting rod 222 is set in the mounting groove 2211 .

[0127] Therefore, the connecting rod 222 is pressed by the pressing block 2212, so that the connection between the connecting rod 222 and the slider mechanism 221 is more firmly connected, and this connection method has a simple structure and is easy to operate.

[0128] In the embodiment of the present application, the surface where the end of the connecting rod 222 contacts the pressing block 2212 is a plane. Thus, the pressing block 2212 can better press the end of the connecting rod 222 through the plane, and the combination is tighter.

[0129] In the embodiment of the present application, the slider mechanism 221 may further include a fixing member 2213 for fixing the pressure block 2212. For example, the fixing member 2213 may be a bolt that passes through the fixing member 2213 to fix the pressure block 2212 to the slider mechanism 221. This allows the connecting rod 222 to be fixed to the slider mechanism 221, and the two to be detachable, resulting in a simple structure and easy installation and removal operations.

[0130] In the embodiment of the present application, the slider mechanism 221 is provided with a slide groove 2214, through which the slider mechanism is slidably connected to the slide track 21. The provision of the slide groove 2214 thereby confines the slider mechanism 221 to the slide track 21, and further confines the slide rod device 22 to the slide track 21, thereby simplifying the connection between the slide rod device 22 and the slide track 21, resulting in a simple structure and ease of implementation.

[0131] Optionally, the diameter of the chute 2214 can be 21-53 mm, for example, 21 mm, 27 mm, 30 mm, 32 mm, 37 mm, 40 mm, 42 mm, 47 mm, 50 mm, 52 mm, or 53 mm. Alternatively, the difference between the diameter of the chute 2214 and the outer diameter of the sealing tube can be 1-3 mm. By limiting the diameter of the chute 2214, the stability of the magnetic connection between the chute 22 and the traction body 23 can be ensured while ensuring that the slide rod device 22 does not get stuck at locations with a small bending radius of the sealing tube, thereby improving the threading and splicing efficiency of the belt threading device 20.

[0132] In the embodiment of the present application, the slider mechanism 221 may further include a guide device 2215 . When the sliding rail 21 is accommodated in the sliding groove 2214 , the guide device 2215 abuts against the sliding rail 21 to limit the slider mechanism 221 .

[0133] Therefore, by providing a guide device 2215 in the slider mechanism 221, the slider mechanism 221 can be limited, so that the sliding direction of the slider mechanism 221 is limited, which facilitates the operation of threading or connecting the belt.

[0134] In an embodiment of the present application, the guide device 2215 includes a ball 2215a, a spring 2215b and an adjusting screw 2215c. The ball 2215a abuts against the sliding track 21 so that the slider mechanism 221 slides along the sliding track 21. The spring 2215b abuts against the ball 2215a. The adjusting screw 2215c is used to adjust the deformation of the spring 2215b to adjust the relative position of the slider mechanism 221 and the sliding track 21.

[0135] Therefore, by setting up the guide device 2215 to include a ball 2215a, a spring 2215b and an adjusting top screw 2215c, rolling friction is created between the slider structure 221 and the sliding track 21, and the friction force is relatively small. By adjusting the position of the slider mechanism 221 relative to the sliding track 21 through the spring 2215b, the relative position, friction force, etc. between the slide rod device 22 and the sliding track 21 can be adjusted, so as to better realize the threading or splicing of the strip.

[0136] It is worth noting that the material of the ball 2215a can be ceramic, so as to prevent metal particles from being generated by friction.

[0137] In the implementation of the present application, the slider mechanism 221 may include four guide devices 2215, and the four guide devices 2215 are symmetrically arranged.

[0138] Therefore, by symmetrically arranging the four guide devices 2215, the slider mechanism 221 can be limited in the three directions of x, y, and z, and the positioning of the slide rod device 22 can be achieved, which facilitates the operation of threading or connecting the belt.

[0139] Optionally, the gap between the chute 2214 and the slide track 21 may be 1-3 mm. By limiting the gap between the chute 2214 and the slide track 21, the stability of the magnetic connection between the chute 22 and the traction body 23 can be ensured while ensuring that the slide bar 22 does not get stuck when passing through a position with a small bending radius of the slide track 21, thereby improving the threading and splicing efficiency of the belt threading device 20.

[0140] Optionally, both ends of the chute 2214 along the conveying direction of the strip have rounded corners, so that the slide bar device 22 can slide through the minimum turning radius without getting stuck when sliding along the slide track 21.

[0141] Optionally, the connecting rod 222 is a hollow tube. For example, the outer diameter of the connecting rod 222 can be 30 mm, the inner diameter can be 20 mm, and the material of the connecting rod 222 can be carbon steel, stainless steel, aluminum alloy, fiberglass, etc., so as to reduce the weight of the connecting rod while ensuring the strength of the connecting rod.

[0142] It is worth noting that the material of at least a portion of the structure of the slider mechanism can be magnetic steel.

[0143] The above describes the structure of a tape threading device provided in an embodiment of the present application. The tape threading device 20 provided in an embodiment of the present application can be used to splice tapes, that is, the tape threading device 20 shown in the above Figures 2-4 can be used to splice tapes.

[0144] The following exemplarily describes the method for splicing a belt using a belt threading device provided in an embodiment of the present application with reference to Figures 5 and 6.

[0145] As shown in FIG5 , a method 300 for splicing a belt using a belt threading device includes:

[0146] 301. The strip is broken into a first strip and a second strip. When the first strip is upstream of the second strip along the strip conveying direction, the sliding rod device 22 is connected to the sliding track 21 at the broken end of the second strip, and the sliding rod device 22 is connected to the second strip.

[0147] In the embodiment of the present application, since the slide rod device 22 is detachably connected to the slide rail 21, the slide rod device 22 can be connected to any position of the slide rail 21, such as the position of the slide rail 21 corresponding to the broken end of the second strip. Then, after the slide rod device 22 is fixed, the slide rod device 22 and the second strip can be connected, for example, the second strip can be connected to the slide rod device by tape.

[0148] 302 , driving the traction body 23 to the broken end of the second strip, so that the traction body 23 pulls the slide bar device 22 to slide along the slide track 21 to the broken end of the first strip.

[0149] In an embodiment of the present application, the traction body 23 can be driven to the broken end of the second strip by means of air pressure difference, etc., so that the traction body 23 can be connected to the sliding rod device 22 located at the broken end of the second strip, and the subsequent traction body 23 can pull the sliding rod device 22 to move, such as pulling the sliding rod device 22 to slide along the sliding track 21 to the broken end of the first strip.

[0150] 303 , splicing the first strip and the second strip.

[0151] In the embodiment of the present application, the sliding rod device 22 drives the broken end of the second strip to slide to the broken end of the first strip, and the broken end of the first strip is close to the broken end of the second strip. The two broken ends can be connected by tape, etc., so that the first strip and the second strip can be connected.

[0152] Therefore, the strips are spliced ​​by the strip threading device 20 . The splicing method is simple and can quickly achieve the splicing of the strips, thereby improving the production efficiency of the battery.

[0153] As shown in FIG6 , a method 400 for splicing a belt using a belt threading device includes:

[0154] 401, confirm the position of the broken strip. For example, the position of the broken strip can be manually determined so that the strip can be reconnected at the confirmed position.

[0155] At 402, the slide bar device 22 is installed on the slide rail 21 at the location where the strip breaks, and one end of the broken strip is secured to the slide bar device 22 using adhesive tape. For example, after confirming the location of the broken strip, the slide bar device 22 is manually installed at the confirmed location, and then the broken strip end is secured to the slide bar device 22. This allows the slide bar device 22 to pull the strip from one end of the broken strip to the other end of the broken strip.

[0156] It is worth noting that, in the conveying direction of the strip, the broken strip end fixed to the slide bar device 22 is located downstream of the broken strip end not fixed to the slide bar device 22 .

[0157] 403, the traction body 23 is pushed by the air pressure difference, so that the traction body 23 moves on the slide track 21 to the position where the slide bar device 22 is located, and is attracted to the slide bar device 22. For example, when the traction body 23 includes the magnetic ball 231 described in Figure 5, and the traction body 23 is located in a sealed circular tube, the traction body 23 can be pushed to slide in the sealed circular tube, and when it slides to the installation position of the slide bar device 22, it is magnetically attracted to the slide bar device 22.

[0158] Optionally, a driving force may be applied to the traction body 23. When the driving force is greater than the friction between the traction body 23 and the slide rail 21, the traction body 23 may slide within the sealed circular tube of the slide rail 21 and reach the installation position of the slide bar device 22, where it is magnetically attracted to the slide bar device 22. For example, a driving force greater than the friction force of 50-20N, such as 5N, may be applied to the traction body 23 to cause the traction body 23 to slide within the sealed circular tube until it stops sliding after magnetically attracting the slide bar device 22.

[0159] 404 , the unwinding device is turned on, and the traction body 23 is driven so that the traction body 23 pulls the slide bar device 22 to slide along the slide track 21 to the other end of the broken strip.

[0160] Optionally, the driving force required to drive the traction body 23 may be greater than the friction force by 20-100 N, such as 30 N, so that the traction body 23 can pull the slide bar device 22 and further pull the belt material to achieve belt splicing.

[0161] It is worth noting that opening the unwinding device and driving the traction body can be performed simultaneously or successively, but the time delay between the two operations should be limited to a certain time to ensure that the strip moves along the sliding track.

[0162] It is also worth noting that, in the conveying direction of the strip, the other end of the broken strip is located upstream of the one end of the broken strip.

[0163] 405, connect the strip at the broken position, remove the slide rod device 22 installed on the slide track 21, and return the traction body 23 to its original position.

[0164] In the embodiment of the present application, after the strips are connected, the slide rod device 22 connected to the slide track 21 is manually removed, and pressure is applied to the traction body 23 so that the traction body 23 slides to its original position, that is, returns to its original position.

[0165] Although the present application has been described with reference to preferred embodiments, various modifications may be made thereto and components may be substituted with equivalents without departing from the scope of the present application. In particular, the various technical features described in the various embodiments may be combined in any manner as long as there are no structural conflicts. The present application is not limited to the specific embodiments disclosed herein, but encompasses all technical solutions within the scope of the claims.

Claims

1. A belt threading device, characterized in that: The belt threading device (20) comprises: A sliding track (21), wherein the sliding track (21) is arranged along a conveying path of the strip; A slide rod device (22), wherein the slide rod device (22) is detachably connected to the slide track (21); A traction body (23) is provided, wherein the traction body (23) can slide along the sliding track (21).

2. The belt threading device according to claim 1, characterized in that: The sliding track (21) comprises a first track (21a) and a second track (21b) which are arranged opposite to each other.

3. The belt threading device according to claim 2, characterized in that: The first track (21a) and / or the second track (21b) are hollow sealed tracks, and the traction body (23) is configured to slide in the sealed track.

4. The belt threading device according to claim 3, characterized in that: The sealing track is connected to an air pressure control device so that the traction body (23) slides in the sealing track under the action of air pressure difference.

5. The belt threading device according to claim 3 or 4, characterized in that: The traction body (23) is magnetically connected to the slide rod device (22) to pull the slide rod device (22).

6. The belt threading device according to any one of claims 3 to 5, characterized in that: When the sealing track is a sealing circular tube, the traction body (23) comprises a cylindrical magnetic ball (231) and a sealing ring (232); the diameter of the magnetic ball (231) is smaller than the inner diameter of the sealing circular tube; and the sealing ring (232) is sleeved on the surface of the magnetic ball (231) to seal the gap between the magnetic ball (231) and the sealing circular tube.

7. The belt threading device according to claim 6, characterized in that: The difference between the diameter of the magnetic ball (231) and the inner diameter of the sealed circular tube is 1-3 mm.

8. The belt threading device according to claim 6 or 7, characterized in that: The length of the magnetic ball (231) along the conveying direction of the strip is 40-100 mm.

9. The belt threading device according to any one of claims 6 to 8, characterized in that: Both ends of the magnetic ball (231) along the conveying direction of the strip have rounded corner structures.

10. The belt threading device according to any one of claims 1 to 9, characterized in that: The slide rod device (22) comprises a connecting rod (222) and a slider mechanism (221), the end of the connecting rod (222) is connected to the slider mechanism (221), and the slider mechanism (221) is slidably connected to the slide track (21).

11. The belt threading device according to claim 10, characterized in that: The slider mechanism (221) is provided with a mounting groove (2211), and the end of the connecting rod (222) is arranged in the mounting groove (2211) to be connected to the slider mechanism (221).

12. The belt threading device according to claim 11, characterized in that: The slider mechanism (221) includes a pressing block (2212) for pressing the end of the connecting rod (222) in the mounting groove (2211) after the end of the connecting rod (222) is arranged in the mounting groove (2211).

13. The belt threading device according to claim 12, characterized in that: The surface where the end of the connecting rod (222) contacts the pressing block (2212) is a plane.

14. The belt threading device according to claim 12 or 13, characterized in that: The slider mechanism (221) further includes a fixing member (2213) for fixing the pressing block (2212).

15. The belt threading device according to any one of claims 10 to 14, characterized in that: The slider mechanism (221) is provided with a sliding groove (2214), and the slider mechanism (221) is slidably connected to the sliding track (21) via the sliding groove (2214).

16. The belt threading device according to claim 15, characterized in that: The slider mechanism (221) includes a guide device (2215). When the sliding track (21) is accommodated in the sliding groove (2214), the guide device (2215) abuts against the sliding track (21) to limit the slider mechanism (221).

17. The belt threading device according to claim 16, characterized in that: The guide device (2215) includes a ball (2215a), a spring (2215b) and an adjusting screw (2215c); the ball (2215a) abuts against the sliding track (21) so that the slider mechanism (221) slides along the sliding track (21); the spring (2215b) abuts against the ball (2215a); and the adjusting screw (2215c) is used to adjust the deformation of the spring (2215b) so as to adjust the relative position of the slider mechanism (221) and the sliding track (21).

18. The belt threading device according to claim 16 or 17, characterized in that: The slider mechanism (221) includes four guide devices (2215), and the four guide devices (2215) are symmetrically arranged.

19. The belt threading device according to any one of claims 15 to 18, characterized in that: The gap size between the slide groove (2214) and the slide track (21) is 1-3 mm.

20. The belt threading device according to any one of claims 15 to 19, characterized in that: Both ends of the chute (2214) along the conveying direction of the strip have a rounded corner structure.

21. The belt threading device according to any one of claims 10 to 20, characterized in that: The connecting rod (222) is a hollow circular tube.

22. A method for splicing a belt using a belt threading device, characterized in that: The strip material is spliced ​​using the strip threading device (20) described in any one of claims 1 to 21.

23. The method according to claim 22, characterized in that The strip is broken into a first strip and a second strip, the first strip being upstream of the second strip along a conveying direction of the strip, and the method comprising: At the broken end of the second strip, the slide rod device (22) is connected to the slide track (21), and the slide rod device (22) is connected to the second strip; Driving the traction body (23) to the broken end of the second strip, so that the traction body (23) pulls the slide bar device (22) to slide along the slide track (21) to the broken end of the first strip; The first tape and the second tape are spliced.

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