An automatic film sleeving device and method for cylindrical lithium batteries

Abstract

The present invention relates to an automatic film sleeving device for cylindrical lithium batteries, which comprises a carrying frame, a preheating conveying mechanism, a film sleeving frame, and a shaping frame. An assembly groove is provided at the rear end face of the carrying frame, and the film sleeving frame is embedded in the assembly groove. The preheating conveying mechanism is embedded in the upper end face of the carrying frame. At the same time, the rear end face of the preheating conveying mechanism is located at the film sleeving frame and is connected to the film sleeving frame. The shaping frame is connected to the outer side face of the rear half of the carrying frame. Its usage method includes four steps: equipment assembly, system pretreatment, film sleeving operation, and covering and shaping. The present invention effectively improves the working efficiency and quality of the film sleeving processing operation of lithium batteries, simplifies the equipment structure, and reduces the operation difficulty; at the same time, it also effectively reduces the equipment operation and maintenance difficulty and cost.

Description

Technical Field

[0001] The present invention belongs to the technology of lithium battery processing equipment, and particularly relates to a cylindrical lithium battery automatic film sleeving device and a using method thereof. Background Art

[0002] Currently, when performing the hot plastic film coating operation on lithium batteries, traditional processing methods often require manual operation by workers, resulting in low production efficiency, high production labor intensity, and great difficulty in product quality control for the film sleeving operation. In response to this problem, numerous film sleeving processing equipment has been developed, such as the "device for sleeving films on lithium batteries" with the patent application number "2023224669977", the "automatic film sleeving device and using method for lithium batteries" with the patent application number "2020106839129", and other processing equipment and methods. Although the working efficiency of the film sleeving operation has been improved to a certain extent, on the one hand, the current processing equipment all have complex structures, difficult operation, poor automation and modularization during the film sleeving processing operation, high equipment usage and maintenance costs, and great difficulty. On the other hand, it is easy to occur that the equipment cannot flexibly adjust the equipment structure according to the usage needs to meet the needs of film sleeving operations for different structural types of lithium batteries, and it is impossible to quickly troubleshoot when the equipment fails, thus affecting the continuity and stability of the production operation.

[0003] Based on the above problems, through research and improvement of the existing problems, a cylindrical lithium battery automatic film sleeving device and a using method thereof are provided, aiming to solve some existing equipment problems through this equipment. Summary of the Invention

[0004] In order to solve the deficiencies in the prior art, the present invention provides a cylindrical lithium battery automatic film sleeving device and a using method thereof.

[0005] In order to achieve the above object, the present invention is realized through the following technical solutions:

[0006] A cylindrical lithium battery automatic film sleeving device, comprising a bearing frame, a preheating conveying mechanism, a film sleeving frame, a shaping frame and a driving circuit. The bearing frame is a frame structure with a rectangular axial cross-section. An assembly groove is provided at the rear end face of the bearing frame, and the film sleeving frame is embedded in the assembly groove. The axis of the film sleeving frame is vertically distributed with the axis of the bearing frame and is parallel to the horizontal plane. The preheating conveying mechanism is embedded in the upper end face of the bearing frame and is parallel to the axis of the bearing frame. At the same time, the rear end face of the preheating conveying mechanism is located at the film sleeving frame and is connected to the film sleeving frame. The shaping frame is connected to the outer side face of the rear half of the bearing frame. At the same time, the shaping frame is parallel to the axis of the film sleeving frame and is connected. The film sleeving frame includes a rotary drive motor, a roller, an electric heating wire, a push rod, a pressing block, a turning mechanism, and a backing plate. Among them, the roller is embedded in the assembly groove, and its axis is vertically distributed with the axis of the bearing frame. At the same time, the roller is connected to the groove wall of the assembly groove through a transmission shaft and is connected to the rotary drive motor through the transmission shaft. A number of positioning grooves evenly distributed around its axis are provided on the roller surface of the roller, and the axis of the positioning groove is parallel to the axis of the roller. A pressing block is provided in the positioning groove. The pressing block is located at the rear half of the positioning groove and is connected to the rear end face of the roller through a push rod, and the pressing block is coaxially distributed with the positioning groove. A backing plate is provided on the front end face of the roller corresponding to the positioning groove. The backing plate is located on the front end face of the roller, is parallel to the front of the roller and is hinged through a turning mechanism. Electric heating wires parallel to the axis of the positioning groove are provided at the positions of the side wall and bottom of the positioning groove corresponding to the roller. The rotary drive motor, the electric heating wire, the push rod, and the turning mechanism are all electrically connected to the driving circuit. The driving circuit is connected to the outer side face of the bearing frame and is electrically connected to the preheating conveying mechanism and the shaping frame respectively.

[0007] Further, a number of universal balls and a temperature sensor are provided in the positioning groove. Among them, the universal balls are evenly distributed along the axis direction of the positioning groove and are connected to the bottom and wall of the positioning groove through elastic pieces. At the same time, the upper end face of the universal ball is at least 3 millimeters above the bottom of the positioning groove. The temperature sensor is electrically connected to the driving circuit.

[0008] Further, the push rod is any one of an electric telescopic rod, a pneumatic telescopic rod and a hydraulic telescopic rod, and the push rod is connected to the pressing block through a pressure sensor. Both the pressing block and the backing plate are closed circular ring structures. Among them, the backing plate can be rotated in the range of 0° - 90° through the turning mechanism. When the rotation angle is 90°, the backing plate is coaxially distributed with the pressing block and the positioning groove and seals the front end face of the positioning groove; when the rotation angle is 0°, the front end face of the positioning groove is opened; at the same time, a guiding break with an inclination angle of 30° - 60° is provided at the edge position of the backing plate. The pressure sensor is electrically connected to the driving circuit.

[0009] Further, the shaping frame includes a positioning frame, a conveying groove, a driving roller set, a guiding roller set, electric heating wires, shaping columns, a cutting mechanism, and a position sensor. The positioning frame is a frame structure with a rectangular cross-section. The front end face of the positioning frame is connected to the outer side face of the bearing frame corresponding to the assembly groove. The rear half of the shaping column is located inside the positioning frame, and its front end face is located inside the assembly groove, with a distance of no more than 5 cm from the front end face of the supporting roller. At the same time, the front end face of the shaping column is located, and a position sensor coaxial with it is arranged inside the front end face of the shaping column. The shaping column is coaxially distributed with the assembly groove directly above the bearing frame in the film sleeving frame. There are two guiding roller sets in total, which are embedded in the positioning frame and wrapped around the shaping column. The axis of the guiding roller set located in the rear half of the shaping column is vertically distributed with respect to the horizontal plane, and the axis of the guiding roller set located in the front half of the shaping column is vertically distributed with respect to the horizontal plane. The conveying groove is a groove-shaped structure with a rectangular cross-section, embedded in the upper end face of the positioning frame and parallel to the shaping column. The front end face of the conveying groove is located above the rear half of the shaping column and behind the guiding roller set located at the rear half of the shaping column. At the same time, a driving roller set is arranged at both the front end face and the rear end face of the conveying groove. The driving roller set is connected to the positioning frame. At the same time, the driving roller set located at the front end face of the conveying groove is located between the front end face of the conveying groove and the guiding roller set, and the axis of this driving roller set is located below the axis of the conveying groove. At the same time, the axis of the driving roller set behind the conveying groove is located above the axis of the conveying groove, and the axes of all driving roller sets are parallel to the axis of the conveying groove. The cutting mechanism is connected to the front end face of the positioning frame and is located 0 - 10 mm in front of the front end face of the shaping column. There are at least two electric heating wires, which are respectively embedded in the bottom of the conveying groove and inside the shaping column. The driving roller set, the guiding roller set, the electric heating wires, the cutting mechanism, and the position sensor are all electrically connected to the driving circuit.

[0010] Further, the driving roller set and the guiding roller set both include a roller frame, working rollers, a lifting adjustment mechanism, a driving motor, and a rotation speed sensor. The roller frame is a frame structure with a rectangular axial cross-section. There are two working rollers in total, which are located inside the roller frame and symmetrically distributed on both sides of the center line of the roller frame. At the same time, the working rollers are slidably connected to the inner side face of the roller frame through the lifting adjustment mechanism. The driving motor is connected to the outer side face of the roller frame and is connected to the working rollers and the rotation speed sensor through a transmission shaft. The rotation speed sensor is connected to the roller frame. The lifting adjustment mechanism, the driving motor, and the rotation speed sensor are all electrically connected to the driving circuit.

[0011] Further, the working roller surface of the guiding roller set is provided with a shaping groove coaxially distributed with it and having any one of a "V" shape, a "U" shape, and a semi-circular structure in cross-section.

[0012] Furthermore, the preheating conveying mechanism includes a conveying frame, conveying rollers, preheating crossarms, electric heating wires, a transmission mechanism, a driving motor, a belt conveyor, an assembly block, a positioning sleeve, and an elastic universal ball bearing, wherein the conveying frame is a frame structure with a rectangular axial cross-section, and the conveying rollers are several and embedded in the upper end surface of the conveying frame and distributed along the axis of the conveying frame. The axis of each conveying roller is perpendicular to the axis of the conveying frame. The spacing between two adjacent conveying rollers is 0.3-0.8 times the diameter of the conveying roller, and the upper end surface of the conveying roller exceeds the upper end surface of the conveying frame by at least 5 mm. At the same time, each conveying roller is connected to the driving motor through a transmission mechanism, and the transmission mechanism and the driving motor are connected to the conveying frame. The belt conveyor is embedded in the upper end surface of the conveying frame, and the axis of the belt conveyor is distributed parallel to the axis of the conveying frame and is located on one side of the conveying roller. The assembly blocks are several and connected to the belt conveyor and are evenly distributed along the axis of the conveying frame. The upper end surface of the assembly block is hinged to a positioning sleeve through a hinge, and the positioning sleeve is a cylindrical The hollow tubular structure of the body can be rotated in the range of 0°-180° by a hinge, and when the rotation angle of the positioning sleeve is 0° and 180°, the axis of the positioning sleeve is parallel to the axis of the conveying roller, and at this time the axis of the positioning sleeve is located above the conveying roller, and the distance between the axis of the positioning sleeve and the conveying roller is 0.5-1.5 times the diameter of the conveying roller. At least three elastic universal balls are evenly distributed around its axis, and each elastic universal ball is connected to the inner side of the positioning sleeve. There are at least three preheating cross arms, which are connected to the lower end surface of the top of the conveying frame and evenly distributed along the axis direction of the conveying frame. The axis of the preheating cross arm is perpendicular to the axis of the conveying frame and parallel to the upper end surface of the conveying frame. At the same time, each preheating cross arm is located between two adjacent conveying rollers. The preheating cross arm is a groove-shaped structure with a cross section in the shape of a "凵" character or an inverted isosceles trapezoid. At least one electric heating wire parallel to its axis is arranged in the groove body of the preheating cross arm, and the electric heating wire, the drive motor, and the belt conveyor are all electrically connected to the drive circuit.

[0013] Furthermore, a pushing mechanism is provided at the bottom of the positioning sleeve, and the pushing mechanism includes an elastic insulating plate, a spring column, and a driving mechanism, wherein the driving mechanism is connected to the bottom of the positioning sleeve and is coaxially distributed, and the driving mechanism is connected to the elastic insulating plate through the spring column, and the elastic insulating plate is coaxially distributed with the positioning sleeve and is slidably connected with the side wall of the positioning sleeve, and the elastic insulating plate is located in front of the driving mechanism, and the driving mechanism is also electrically connected to the driving circuit.

[0014] A method for using a cylindrical lithium battery automatic film covering device comprises the following steps:

[0015] S1. Equipment assembly: First, assemble the bearing frame, preheating conveyor mechanism, film sleeving frame, shaping frame, and drive circuit to obtain the finished film sleeving equipment. Then, install and fix the finished film sleeving equipment at the specified working position through the bearing frame. At the same time, connect the front end face of the preheating conveyor mechanism to the feeding equipment, connect the shaping frame to the thermoplastic film supply equipment, connect the film sleeving frame to the subsequent processing equipment for lithium batteries, and finally connect the drive circuit to the external control circuit system and power supply system to complete the system configuration.

[0016] S2. System preprocessing: On the one hand, convey the lithium battery to be processed to the preheating conveyor mechanism through the feeding equipment. The preheating conveyor mechanism clamps and positions the lithium battery to be processed and conveys it to the film sleeving frame, and preheats the lithium battery to be processed during the conveying process. On the other hand, the shaping frame processes the strip-shaped thermoplastic film conveyed by the thermoplastic film supply equipment into a hollow cylindrical tubular structure for standby.

[0017] S3. Film sleeving operation: First, the preheating conveyor mechanism conveys a lithium battery to be processed to the film sleeving frame and drops it into a positioning groove of the roller in the film sleeving frame, and rotates the roller to transfer the lithium battery to be processed directly above the bearing frame. Then, the shaping frame drives the processed hollow cylindrical tubular structure of the thermoplastic film to be pushed into the positioning groove where the lithium battery to be processed is located and wraps it around the lithium battery to be processed. At the same time, the cutting mechanism of the shaping frame cuts the thermoplastic film of the hollow cylindrical tubular structure, and after cutting, the shaping frame returns to the standby state again to complete the film sleeving operation.

[0018] S4. Wrapping and shaping: After completing step S3, first drive the flipping mechanism of the film sleeving frame to operate, rotate the driving backing plate through the flipping mechanism, and block the front end face of the positioning groove that has completed step S3. Then drive the push rod to operate, and the push rod drives the pressing plate to extrude the lithium battery. On the one hand, it improves the positioning stability of the lithium battery; on the other hand, through extrusion, the thermoplastic film at both ends of the lithium battery is made to wrap the end face of the lithium battery. Finally, on the one hand, drive the electric heating wire of the roller to heat the thermoplastic film, and through heating, the thermoplastic film is wrapped and positioned outside the lithium battery. When the lithium battery completed with thermoplastic wrapping rotates to the lowest position of the roller, release the extrusion of the lithium battery through the push rod, so that the lithium battery is discharged from the positioning groove under the action of gravity and conveyed to the subsequent processing equipment for subsequent processing operations. On the other hand, drive the roller to rotate, convey another lithium battery to be processed to the film sleeving frame, and perform cyclic operations on the newly conveyed lithium battery to be processed in the film sleeving frame according to step S2 to achieve continuous cyclic wrapping and shaping operations.

[0019] The structure of the present invention has good versatility, high levels of system integration, automation, and modularity. It effectively improves the working efficiency and quality of the lithium battery film wrapping operation, simplifies the equipment structure, and reduces the operation difficulty. At the same time, it effectively reduces the equipment operation and maintenance difficulty and cost. It can achieve rapid replacement of equipment parts and can also flexibly adjust the equipment structure according to the needs of the production process to meet the needs of the film wrapping operation for lithium batteries of different structural types, thereby greatly improving the versatility of the equipment and enhancing the stability and troubleshooting rate of equipment use. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present invention will be described in detail below in conjunction with the drawings and specific embodiments;

[0021] Figure 1 is a schematic top view structure diagram of the present invention;

[0022] Figure 2 is a schematic partial axial sectional structure diagram of the idler roller;

[0023] Figure 3 is a schematic partial cross-sectional sectional structure diagram of the idler roller;

[0024] Figure 4 is a schematic partial side view structure diagram of the shaping frame;

[0025] Figure 5 is a schematic partial axial distribution structure diagram of the connection relationship between the shaping column and the guide roller group;

[0026] Figure 6 is a schematic partial cross-sectional distribution structure diagram of the connection relationship between the shaping column and the guide roller group;

[0027] Figure 7 is a schematic partial axial sectional structure diagram of the preheating cross bar;

[0028] Figure 8 is a schematic diagram of the connection relationship and structure of the assembly block and the positioning sleeve;

[0029] Figure 9 is a schematic diagram of the method flow of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0030] To make the technical means, creative features, achieved purposes, and effects of the present invention easy to implement, the present invention will be further described below in conjunction with specific embodiments.

[0031] Such as Figures 1-8As shown in the figure, an automatic film sleeving device for cylindrical lithium batteries includes a bearing frame 1, a preheating conveying mechanism 2, a film sleeving frame 3, a shaping frame 4 and a drive circuit 5. The bearing frame 1 is a frame structure with a rectangular axial cross-section. An assembly groove 6 is provided at the rear end face of the bearing frame 1, and the film sleeving frame 3 is embedded in the assembly groove 6. The axis of the film sleeving frame 5 is vertically distributed with respect to the axis of the bearing frame 1 and is parallel to the horizontal plane. The preheating conveying mechanism 2 is embedded in the upper end face of the bearing frame 1 and is parallel to the axis of the bearing frame 1. At the same time, the rear end face of the preheating conveying mechanism 2 is located at the film sleeving frame 3 and is connected to the film sleeving frame 3. The shaping frame 4 is connected to the outer side face of the rear half of the bearing frame 1. At the same time, the shaping frame 4 is parallel to the axis of the film sleeving frame 3 and is connected.

[0032] In this embodiment, the film sleeving frame 3 includes a rotary drive motor 31, a roller 32, an electric heating wire 33, a push rod 34, a pressing block 35, a flipping mechanism 36, and a backing plate 37. The roller 32 is embedded in the assembly groove 6, and its axis is vertically distributed with respect to the axis of the bearing frame 1. At the same time, the roller 32 is connected to the groove wall of the assembly groove 6 through a transmission shaft and is connected to the rotary drive motor 31 through the transmission shaft. A plurality of positioning grooves 38 evenly distributed around its axis are provided on the roller surface of the roller 32, and the axis of the positioning groove 38 is parallel to the axis of the roller 32. A pressing block 35 is provided in the positioning groove 38. The pressing block 35 is located at the rear half of the positioning groove 38 and is connected to the rear end face of the roller 32 through a push rod 34, and the pressing block 35 is coaxially distributed with the positioning groove 38. A backing plate 37 is provided on the front end face of the roller 32 corresponding to the positioning groove 38. The backing plate 37 is located on the front end face of the roller 32, is parallel to the front of the roller 3 and is hinged through a flipping mechanism 36. An electric heating wire 33 parallel to the axis of the positioning groove is provided at the position of the roller corresponding to the side wall and bottom of the positioning groove 38. The rotary drive motor 31, the electric heating wire 33, the push rod 34, and the flipping mechanism 36 are all electrically connected to the drive circuit 5. The drive circuit 5 is connected to the outer side face of the bearing frame 1 and is electrically connected to the preheating conveying mechanism 2 and the shaping frame 4 respectively.

[0033] Among them, the drive motor 31 is connected to the outer side face of the bearing frame 1 corresponding to the assembly groove 6.

[0034] Among them, a plurality of universal balls 381 and a temperature sensor 382 are provided in the positioning groove 38. The universal balls 381 are evenly distributed along the axis direction of the positioning groove 38 and are connected to the bottom and side walls of the positioning groove 38 through elastic pieces 383. The temperature sensor 382 is electrically connected to the drive circuit 5.

[0035] The provided temperature sensor can accurately control the working temperature during the film sleeving operation, prevent damage to the lithium battery and the protective film structure caused by high temperature; and at the same time prevent quality defects such as poor connection and positioning stability between the protective film and the lithium battery due to insufficient temperature;

[0036] The provided universal ball bearings and the elastic pieces that cooperate with the universal ball bearings can, on the one hand, effectively achieve basic clamping and positioning of the lithium battery through the elastic deformation ability of the elastic pieces, and prevent the risk of structural damage caused by the direct collision between the lithium battery and the positioning groove when the lithium battery falls into the positioning groove; on the other hand, during the film covering operation, the elastic deformation ability of the elastic pieces is utilized to improve the convenience of covering the outer surface of the lithium battery with the film; at the same time, the provided universal ball bearings can effectively reduce the contact area between the lithium battery and the positioning groove, and reserve a certain gap between the lithium battery and the positioning groove, thereby effectively reducing the friction between the protective film and the groove wall of the positioning groove during the film covering operation and improving the flexibility and reliability of the film covering.

[0037] In this embodiment, the push rod 34 is any one of an electric telescopic rod, a pneumatic telescopic rod, and a hydraulic telescopic rod, and the push rod 34 is connected to the pressing block 35 through a pressure sensor 39. Both the pressing block 35 and the backing plate 37 are closed circular ring structures. Among them, the backing plate 37 can rotate within a range of 0° - 90° through a flipping mechanism 36. When the rotation angle is 90°, the backing plate 37, the pressing block 35, and the positioning groove 38 are coaxially distributed and block the front end face of the positioning groove 38; when the rotation angle is 0°, the front end face of the positioning groove 38 is opened; at the same time, a guiding break 371 with an inclination angle of 30° - 60° is provided at the edge position of the backing plate 37, and the pressure sensor 39 is electrically connected to the driving circuit 5.

[0038] Setting the pressing block and the backing plate as circular ring structures can prevent damage to the electrodes of the lithium battery during the film covering operation and the lithium battery positioning operation, and the driving force is detected by the pressure sensor to prevent damage to the battery structure due to excessive pressure.

[0039] At the same time, the provided guiding break can assist in cutting the film covering.

[0040] Specifically, the shaping frame 4 includes a positioning frame 41, a conveying groove 42, a driving roller set 43, a guiding roller set 44, an electric heating wire 33, a shaping column 46, a cutting mechanism 47, and a position sensor 45. The positioning frame 41 has a frame structure with a rectangular cross-section. The front end face of the positioning frame 41 is connected to the outer side face of the bearing frame 1 corresponding to the assembly groove 6. The rear half of the shaping column 46 is located inside the positioning frame 41, and its front end face is located inside the assembly groove 6, with a distance from the front end face of the supporting roller 32 not greater than 5 cm. At the same time, a position sensor 45 coaxial with it is provided on the front end face of the shaping column 46, and the shaping column 46 is coaxially distributed with the assembly groove 6 above the bearing frame 1 in the film sleeving frame 3. There are two guiding roller sets 44 in total, embedded in the positioning frame 41 and covering the outside of the shaping column 46. The axes of the guiding roller sets 43 located at the rear half of the shaping column 46 are vertically distributed with respect to the horizontal plane, and the axes of the guiding roller sets 44 located at the front half of the shaping column 46 are vertically distributed with respect to the horizontal plane. The conveying groove 42 has a groove-shaped structure with a rectangular cross-section, embedded in the upper end face of the positioning frame 41 and parallel to the shaping column 46. The front end face of the conveying groove 42 is located above the rear half of the shaping column 46 and behind the guiding roller set 43 at the position of the rear half of the shaping column 46. At the same time, a driving roller set 43 is provided at both the front end face and the rear end face of the conveying groove 42. The driving roller set 43 is connected to the positioning frame 41. At the same time, the driving roller set 43 at the front end face of the conveying groove 42 is located between the front end face of the conveying groove 42 and the guiding roller set 43, and the axis of this driving roller set 43 is located below the axis of the conveying groove 42. At the same time, the axis of the driving roller set 43 behind the conveying groove 42 is located above the axis of the conveying groove, and the axes of each driving roller set 43 are parallel to the axis of the conveying groove 42. The cutting mechanism 47 is connected to the front end face of the positioning frame 41, and the cutting mechanism 47 is located 0 - 10 mm in front of the front end face of the shaping column 46. There are at least two electric heating wires 33, respectively embedded in the bottom of the conveying groove 42 and inside the shaping column 46. The driving roller set 43, the guiding roller set 44, the electric heating wire 33, the cutting mechanism 47, and the position sensor 45 are all electrically connected to the driving circuit 5.

[0041] During operation, through the cooperation of the conveying groove and the driving roller set, while driving and conveying the strip-shaped film sleeve, the strip-shaped film sleeve can be flattened to prevent the wrinkles of the strip-shaped film sleeve from affecting the working quality of the subsequent film sleeving operation.

[0042] At the same time, the provided guiding roller set and shaping column can coil the strip-shaped film sleeve and cover it outside the shaping column to form a cylindrical hollow tubular film sleeve coaxially distributed with the shaping column. At the same time, under the driving force of the driving roller set and the guiding roller set, the hollow tubular film sleeve is covered on the lithium battery.

[0043] The set positioning sensor serves as a detection unit for detecting lithium batteries. After detecting that a lithium battery is placed in the positioning slot, the driving roller group and the guiding roller group are driven to perform the film sleeving operation on the lithium battery.

[0044] The set electric heating wire 33 is used to preheat the sleeved film to improve the processing efficiency of subsequent thermoplastic forming.

[0045] Further optimized, the in-place sensor 45 is any one or a combination of two of a magnetic sensor and a photosensitive sensor.

[0046] Further described, the driving roller group 43 and the guiding roller group 44 each include a roller frame 441, a working roller 442, a lifting adjustment mechanism 443, a driving motor 31, and a rotational speed sensor 444. Among them, the roller frame 441 is a frame structure with a rectangular axial cross-section. There are two working rollers 442 in total, which are located inside the roller frame 441 and symmetrically distributed on both sides of the midline of the roller frame 441. At the same time, the working roller 442 is slidably connected to the inner side surface of the roller frame 441 through the lifting adjustment mechanism 443. The driving motor 31 is connected to the outer side surface of the roller frame 441 and is connected to the working roller 442 and the rotational speed sensor 444 through a transmission shaft. And the rotational speed sensor 444 is connected to the roller frame 441. The lifting adjustment mechanism 443, the driving motor 31, and the rotational speed sensor 444 are all electrically connected to the driving circuit 5.

[0047] It should be noted specifically that the working roller surface of the guiding roller group is provided with a shaping groove 445 that is coaxially distributed with it and has any one of a "V" shape, a "U" shape, and a semi-circular structure in the cross-section.

[0048] The bending and shaping operation on the strip-shaped sleeved film is realized through the provided shaping groove.

[0049] In addition, it is necessary to explain that the preheating conveying mechanism 2 includes a conveying frame 21, a conveying roller 22, a preheating cross arm 23, an electric heating wire 33, a transmission mechanism 25, a driving motor 31, a belt conveyor 27, an assembly block 28, a positioning sleeve 26, and an elastic universal ball 24, wherein the conveying frame 21 is a frame structure with a rectangular axial section, and a plurality of conveying rollers 22 are embedded in the upper end surface of the conveying frame 21 and distributed along the axis direction of the conveying frame 21, and the axis of each conveying roller 22 is perpendicular to the axis of the conveying frame 21, and the distance between two adjacent conveying rollers 22 is 0. 3-0.8 times, and the upper end surface of the conveying roller 22 exceeds the upper end surface of the conveying frame 21 by at least 5 mm, and each conveying roller 22 is connected to the drive motor 31 through the transmission mechanism 25, and the transmission mechanism 25 and the drive motor 31 are connected to the conveying frame 21, and the belt conveyor 27 is embedded in the upper end surface of the conveying frame 21, and the axis of the belt conveyor 27 is parallel to the axis of the conveying frame 21 and is located on one side of the conveying roller 22, and the assembly blocks 28 are connected to the belt conveyor 27 and are evenly distributed along the axis direction of the conveying frame 21, and the upper end surface of the assembly block 28 is connected to a positioning sleeve 2 through a hinge 6 hinged, the positioning sleeve 26 is a cylindrical hollow tubular structure, which can rotate within a range of 0°-180° through the hinge, and when the positioning sleeve 26 rotates at an angle of 0° and 180°, the axis of the positioning sleeve 26 is parallel to the axis of the conveying roller 22, and at this time the axis of the positioning sleeve 26 is located above the conveying roller 22, and the distance between the axis of the positioning sleeve 26 and the conveying roller 22 is 0.5-1.5 times the diameter of the conveying roller 22. At least three elastic universal balls 24 are evenly distributed around the axis of the positioning sleeve 26, and each elastic universal ball 24 is connected to the inner side of the positioning sleeve 26. The preheating cross arm 23 has at least three , connected to the lower end surface of the top of the conveying frame 21 and evenly distributed along the axis direction of the conveying frame 21, the axis of the preheating cross arm 23 is perpendicular to the axis of the conveying frame 21, and is parallel to the upper end surface of the conveying frame 21, and each preheating cross arm 23 is located between two adjacent conveying rollers 22, and the preheating cross arm 23 is a groove-shaped structure with a cross section in the shape of a "凵" character or an inverted isosceles trapezoid. At least one electric heating wire 33 parallel to its axis is arranged in the groove body of the preheating cross arm 23, and the electric heating wire 33, the drive motor 31, and the belt conveyor 27 are all electrically connected to the drive circuit 5.

[0050] During operation, the preheating cross arm and electric heating wire are used to preheat the lithium battery in the conveying state.

[0051] During operation, insert the lithium battery into the positioning sleeve, and then flip the positioning sleeve so that the axis of the lithium battery is parallel to and abuts against the conveying roller. Then, on the one hand, drive the belt conveyor to run, so as to convey the assembled lithium battery along the axis direction of the bearing frame to the film sleeving frame; on the other hand, cooperate with the transmission mechanism and the driving motor to drive each conveying roller to rotate. Through the rotation state of the conveying roller, the lithium battery passing through the conveying roller is also driven to rotate synchronously, thereby improving the preheating uniformity of the lithium battery.

[0052] Meanwhile, when the lithium battery is installed and positioned in the positioning sleeve, the elastic universal ball bearings provided can clamp and position the lithium battery, and at the same time, the elastic universal ball bearings can also assist the rotation operation of the lithium battery.

[0053] In this embodiment, at least two air outlets 8 are arranged at the bottom of the groove of the preheating cross bar 23 and are evenly distributed along its axis. Each air outlet 8 is communicated with a hot air blower 9 through a diversion pipe, and the hot air blower 9 is connected to the outer side surface of the bearing frame 1 and is electrically connected to the driving circuit 5, so as to further improve the preheating ability of the lithium battery.

[0054] Specifically, a pushing mechanism 7 is arranged at the bottom of the positioning sleeve 26. The pushing mechanism 7 includes an elastic insulating plate 71, a spring column 72, and a driving mechanism 73. The driving mechanism 73 is connected to the bottom of the positioning sleeve 26 and is coaxially distributed. The driving mechanism 73 is connected to the elastic insulating plate 71 through the spring column 72. The elastic insulating plate 71 is coaxially distributed with the positioning sleeve 26 and is slidably connected to the side wall of the positioning sleeve 26. At the same time, the elastic insulating plate 71 is located in front of the driving mechanism 73, and the driving mechanism 73 is also electrically connected to the driving circuit 5.

[0055] When the lithium battery is conveyed to the position of the film sleeving frame, the pushing mechanism arranged can push the lithium battery out of the positioning sleeve, so that the preheated lithium battery falls into the positioning groove of the film sleeving frame for subsequent processing operations.

[0056] Further optimized, the driving mechanism 5 is an electric telescopic mechanism, specifically a linear reciprocating motion mechanism such as an electric telescopic column or an electric telescopic pin.

[0057] In this embodiment, the driving circuit is a circuit system based on a programmable controller, and the driving circuit is also provided with a serial communication circuit.

[0058] As Figure 9 shown, a method for using a cylindrical lithium battery automatic film sleeving device includes the following steps:

[0059] S1. Equipment assembly: First, assemble the bearing frame, preheating conveyor mechanism, film sleeving frame, shaping frame and drive circuit to obtain the finished film sleeving equipment. Then, install and fix the finished film sleeving equipment at the specified working position through the bearing frame. At the same time, connect the front end face of the preheating conveyor mechanism to the feeding equipment, connect the shaping frame to the thermoplastic film supply equipment, connect the film sleeving frame to the subsequent lithium battery processing equipment, and finally connect the drive circuit to the external control circuit system and power supply system, thus completing the system configuration.

[0060] S2. System pre-treatment: On the one hand, convey the lithium battery to be processed to the preheating conveyor mechanism through the feeding equipment. The preheating conveyor mechanism clamps and positions the lithium battery to be processed and conveys it to the film sleeving frame, and preheats the lithium battery to be processed during the conveying process. On the other hand, the shaping frame processes the strip-shaped thermoplastic film conveyed by the thermoplastic film supply equipment into a hollow cylindrical tubular structure for standby.

[0061] S3. Film sleeving operation: First, the preheating conveyor mechanism conveys a lithium battery to be processed to the film sleeving frame and drops it into a positioning groove of the roller in the film sleeving frame, and rotates the roller to transfer the lithium battery to be processed directly above the bearing frame. Then, the shaping frame drives the processed hollow cylindrical tubular structure of the thermoplastic film to be pushed into the positioning groove where the lithium battery to be processed is located and wraps it around the lithium battery to be processed. At the same time, the cutting mechanism of the shaping frame cuts the hollow cylindrical tubular structure of the thermoplastic film, and after cutting, the shaping frame returns to the standby state again, thus completing the film sleeving operation.

[0062] S4. Coating and shaping: After completing step S3, first drive the flipping mechanism of the film sleeving frame to operate, rotate the driving backing plate through the flipping mechanism, and block the front end face of the positioning groove after completing step S3. Then drive the push rod to operate, and the push rod drives the pressing plate to extrude the lithium battery. On the one hand, it improves the positioning stability of the lithium battery; on the other hand, through extrusion, the thermoplastic film at both ends of the lithium battery is made to wrap the end face of the lithium battery. Finally, on the one hand, drive the electric heating wire of the roller to heat the thermoplastic film. Through heating, the thermoplastic film is wrapped and positioned outside the lithium battery. When the lithium battery completed with thermoplastic coating rotates to the lowest position of the roller, release the extrusion of the lithium battery through the push rod, so that the lithium battery is discharged from the positioning groove under the action of gravity and conveyed to the subsequent processing equipment for subsequent processing operations. On the other hand, drive the roller to rotate, convey another lithium battery to be processed to the film sleeving frame, and perform cyclic operations on the newly conveyed lithium battery to be processed according to step S2, thus realizing continuous cyclic coating and shaping operations.

[0063] The structure of the present invention has good versatility, high degrees of system integration, automation, and modularization, effectively improving the working efficiency and quality of the lithium battery film sleeving operation, simplifying the equipment structure, and reducing the operation difficulty. At the same time, it also effectively reduces the equipment operation and maintenance difficulty and cost. It can achieve rapid replacement of equipment components, and can also flexibly adjust the equipment structure according to the needs of the production process to meet the needs of the lithium battery film sleeving operation of different structural types, thus greatly improving the versatility of the equipment and enhancing the stability and troubleshooting rate of the equipment use.

[0064] The above shows and describes the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. An automatic film sleeving device for cylindrical lithium batteries, characterized in that, The cylindrical lithium battery automatic film sleeving device includes a bearing frame, a preheating conveying mechanism, a film sleeving frame, a shaping frame and a drive circuit. The bearing frame is a frame structure with a rectangular axial cross-section. An assembly groove is provided at the rear end face of the bearing frame, and the film sleeving frame is embedded in the assembly groove. The axis of the film sleeving frame is vertically distributed with respect to the axis of the bearing frame and is parallel to the horizontal plane. The preheating conveying mechanism is embedded in the upper end face of the bearing frame and is parallel to the axis of the bearing frame. At the same time, the rear end face of the preheating conveying mechanism is located at the film sleeving frame and is connected to the film sleeving frame. The shaping frame is connected to the outer side face of the rear half of the bearing frame. At the same time, the shaping frame is parallel to and connected to the axis of the film sleeving frame. The film sleeving frame includes a rotary drive motor, a roller, an electric heating wire, a push rod, a pressing block, a flipping mechanism, and a backing plate. Among them, the roller is embedded in the assembly groove, and its axis is vertically distributed with respect to the axis of the bearing frame. At the same time, the roller is connected to the groove wall of the assembly groove through a transmission shaft and is connected to the rotary drive motor through the transmission shaft. A number of positioning grooves evenly distributed around its axis are provided on the roller surface of the roller, and the axis of the positioning groove is parallel to the axis of the roller. A pressing block is provided in the positioning groove. The pressing block is located at the rear half of the positioning groove and is connected to the rear end face of the roller through a push rod, and the pressing block is coaxially distributed with the positioning groove. A backing plate is provided on the front end face of the roller corresponding to the positioning groove. The backing plate is located on the front end face of the roller, is parallel to the front of the roller and is hinged through a flipping mechanism. An electric heating wire parallel to the axis of the positioning groove is provided at the position of the roller corresponding to the side wall and the bottom of the positioning groove. The rotary drive motor, the electric heating wire, the push rod, and the flipping mechanism are all electrically connected to the drive circuit. The shaping frame includes a positioning frame, a conveying groove, a driving roller group, a guiding roller group, an electric heating wire, a shaping column, a cutting mechanism, and a position sensor. Among them, the positioning frame is a frame structure with a rectangular cross-section. The front end face of the positioning frame is connected to the outer side face of the bearing frame corresponding to the assembly groove. The rear half of the shaping column is located in the positioning frame, and its front end face is located in the assembly groove. The distance between its front end face and the front end face of the roller is not greater than 5 cm. At the same time, the front end face of the shaping column is located, and a position sensor coaxial with it is provided in the front end face of the shaping column. The shaping column is coaxially distributed with the assembly groove directly above the bearing frame in the film sleeving frame;There are two sets of guide rollers in total, which are embedded in the positioning frame and wrapped around the shaping column. The axis of the guide roller set located in the second half of the shaping column is vertically distributed with respect to the horizontal plane, and the axis of the guide roller set located in the first half of the shaping column is vertically distributed with respect to the horizontal plane. The conveying groove is a trough-shaped structure with a rectangular cross-section, which is embedded in the upper end face of the positioning frame and is parallel to the shaping column. The front end face of the conveying groove is located above the second half of the shaping column and behind the guide roller set located in the second half of the shaping column. At the same time, a driving roller set is provided at both the front end face and the rear end face of the conveying groove. The driving roller set is connected to the positioning frame. At the same time, the driving roller set located at the front end face of the conveying groove is located between the front end face of the conveying groove and the guide roller set, and the axis of this driving roller set is located below the axis of the conveying groove. At the same time, the axis of the driving roller set behind the conveying groove is located above the axis of the conveying groove, and the axes of each driving roller set are parallel to the axis of the conveying groove. The cutting mechanism is connected to the front end face of the positioning frame, and the cutting mechanism is located 0-10 millimeters in front of the front end face of the shaping column. There are at least two electric heating wires, which are respectively embedded in the bottom of the conveying groove and in the shaping column. The driving roller set, the guide roller set, the electric heating wire, the cutting mechanism, and the in-place sensor are all electrically connected to the driving circuit. The driving circuit is connected to the outer side of the bearing frame and is respectively electrically connected to the preheating conveying mechanism and the shaping frame.; 2. The automatic film sleeving device for a cylindrical lithium battery according to claim 1, characterized in that, A number of universal balls and a temperature sensor are arranged in the positioning groove. The universal balls are evenly distributed along the axis of the positioning groove and are connected to the bottom and the wall of the positioning groove through elastic pieces. At the same time, the upper end surface of the universal ball is at least 3 millimeters above the bottom of the positioning groove. The temperature sensor is electrically connected to the driving circuit.

3. The automatic film sleeving device for a cylindrical lithium battery according to claim 1, wherein, The push rod is any one of an electric telescopic rod, a pneumatic telescopic rod and a hydraulic telescopic rod. The push rod is connected to the pressing block through a pressure sensor. Both the pressing block and the backing plate are closed circular ring structures. The backing plate can be rotated within the range of 0°-90° through a flipping mechanism. When the rotation angle is 90°, the backing plate is coaxially distributed with the pressing block and the positioning groove and seals the front end surface of the positioning groove. When the rotation angle is 0°, the front end surface of the positioning groove is opened. At the same time, a guiding break with an inclination angle of 30°-60° is arranged at the edge position of the backing plate. The pressure sensor is electrically connected to the driving circuit.

4. A cylindrical lithium battery automatic film sleeving device according to claim 1, characterized in that, Both the driving roller group and the guiding roller group include a roller frame, working rollers, a lifting adjustment mechanism, a driving motor and a rotational speed sensor. The roller frame is a frame structure with a rectangular axial cross section. There are two working rollers, which are located inside the roller frame and symmetrically distributed on both sides of the center line of the roller frame. At the same time, the working rollers are slidably connected to the inner side surface of the roller frame through the lifting adjustment mechanism. The driving motor is connected to the outer side surface of the roller frame and is connected to the working rollers and the rotational speed sensor through a transmission shaft. The rotational speed sensor is connected to the roller frame. The lifting adjustment mechanism, the driving motor and the rotational speed sensor are all electrically connected to the driving circuit.

5. The automatic film sleeving device for cylindrical lithium batteries according to claim 4, wherein, The working roller surface of the guiding roller group is provided with a shaping groove that is coaxially distributed with it and has any one of a "V" shape, a "U" shape and a semi-circular structure in cross section.

6. The automatic film sleeving device for cylindrical lithium batteries according to claim 1, wherein, The preheating conveying mechanism includes a conveying frame, conveying rollers, preheating crossarms, electric heating wires, a transmission mechanism, a driving motor, a belt conveyor, an assembly block, a positioning sleeve, and an elastic universal ball. The conveying frame is a frame structure with a rectangular axial cross-section. The conveying rollers are embedded in the upper end surface of the conveying frame and distributed along the axis of the conveying frame. The axis of each conveying roller is perpendicular to the axis of the conveying frame. The spacing between two adjacent conveying rollers is 0.3-0.8 times the diameter of the conveying roller, and the upper end surface of the conveying roller exceeds the upper end surface of the conveying frame by at least 5 mm. At the same time, each conveying roller is connected to the driving motor through a transmission mechanism. The transmission mechanism and the driving motor are connected to the conveying frame. The belt conveyor is embedded in the upper end surface of the conveying frame, and the axis of the belt conveyor is parallel to the axis of the conveying frame and is located on one side of the conveying roller. The assembly blocks are connected to the belt conveyor and are evenly distributed along the axis of the conveying frame. The upper end surface of the assembly block is hinged to a positioning sleeve through a hinge, and the positioning sleeve is a hollow cylinder. The tubular structure can be rotated in the range of 0°-180° by a hinge, and when the rotation angle of the positioning sleeve is 0° and 180°, the axis of the positioning sleeve is parallel to the axis of the conveying roller, and at this time the axis of the positioning sleeve is located above the conveying roller, and the distance between the axis of the positioning sleeve and the conveying roller is 0.5-1.5 times the diameter of the conveying roller. At least three elastic universal balls are evenly distributed around its axis, and each elastic universal ball is connected to the inner side of the positioning sleeve. There are at least three preheating cross arms, which are connected to the lower end surface of the top of the conveying frame and evenly distributed along the axis direction of the conveying frame. The axis of the preheating cross arm is perpendicular to the axis of the conveying frame and parallel to the upper end surface of the conveying frame. At the same time, each preheating cross arm is located between two adjacent conveying rollers. The preheating cross arm is a groove-shaped structure with a cross section in the shape of a "凵" character or an inverted isosceles trapezoid. At least one electric heating wire parallel to its axis is arranged in the groove body of the preheating cross arm, and the electric heating wire, the driving motor, and the belt conveyor are all electrically connected to the driving circuit.

7. An automatic film sleeving device for cylindrical lithium batteries according to claim 6, characterized in that, A pushing mechanism is also provided at the bottom of the positioning sleeve, and the pushing mechanism includes an elastic insulating plate, a spring column, and a driving mechanism, wherein the driving mechanism is connected to the bottom of the positioning sleeve and is coaxially distributed, and the driving mechanism is connected to the elastic insulating plate through the spring column, and the elastic insulating plate is coaxially distributed with the positioning sleeve and is slidably connected with the side wall of the positioning sleeve, and the elastic insulating plate is located in front of the driving mechanism, and the driving mechanism is also electrically connected to the driving circuit.

8. The usage method of an automatic film sleeving device for cylindrical lithium batteries according to claim 1, characterized in that, The method for using the cylindrical lithium battery automatic film covering device comprises the following steps: S1, equipment assembly, first assemble the carrying frame, preheating and conveying mechanism, film covering frame, shaping frame and driving circuit to obtain the finished film covering equipment, and fix the finished film covering equipment at the designated working position through the carrying frame, connect the front end surface of the preheating and conveying mechanism with the feeding equipment, connect the shaping frame with the thermoplastic film supply equipment, connect the film covering frame with the lithium battery subsequent processing equipment, and finally connect the driving circuit with the external control circuit system and power supply system to complete the system configuration; S2. System preprocessing: On the one hand, the lithium battery to be processed is conveyed to the preheating conveying mechanism by the feeding device, and the preheating conveying mechanism clamps and positions the lithium battery to be processed and conveys it to the film sleeving rack, and at the same time preheats the lithium battery to be processed during the conveying process; on the other hand, the shaping rack processes the strip-shaped thermoplastic film supplied by the thermoplastic film supply device into a hollow cylindrical tubular structure for standby; S3. Film sleeving operation: First, the preheating conveying mechanism conveys a lithium battery to be processed to the film sleeving rack and drops it into a positioning groove of the roller on the film sleeving rack, and rotates the roller to transfer the lithium battery to be processed directly above the bearing rack; then the shaping rack drives the processed hollow cylindrical tubular structure of the thermoplastic film to be pushed into the positioning groove where the lithium battery to be processed is located and wraps it around the lithium battery to be processed. At the same time, the cutting mechanism of the shaping rack cuts the thermoplastic film of the hollow cylindrical tubular structure, and after cutting, the shaping rack returns to the standby state again, and the film sleeving operation can be completed; S4. Wrapping and shaping: After completing step S3, first drive the flipping mechanism of the film sleeving rack to operate, rotate the driving backing plate through the flipping mechanism, and block the front end face of the positioning groove that has completed step S3; then drive the push rod to operate, and the push rod drives the pressing plate to extrude the lithium battery. On the one hand, it improves the positioning stability of the lithium battery; on the other hand, the thermoplastic film at both ends of the lithium battery is extruded through the extrusion, so that the thermoplastic film wraps the end face of the lithium battery; finally, on the one hand, drive the electric heating wire of the roller to heat the thermoplastic film, and through heating, the thermoplastic film is wrapped and positioned outside the lithium battery. When the lithium battery completed with heat shrinkage wrapping rotates to the lowest position of the roller, loosen the extrusion of the lithium battery through the push rod, so that the lithium battery is discharged from the positioning groove under the action of gravity and conveyed to the subsequent processing equipment for subsequent processing operations; on the other hand, drive the roller to rotate, convey another lithium battery to be processed to the film sleeving rack, and perform cyclic operations on the newly conveyed lithium battery to be processed according to step S2, and continuous cyclic wrapping and shaping operations can be achieved.

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