High-speed assembly line for edge and bottom films of batteries

Abstract

The invention relates to a battery edge and bottom membrane high-speed assembly line which comprises a feeding device, a steel shell conveying line used for conveying battery steel shells along an assembly station, a bottom membrane assembly device arranged along the steel shell conveying line, an edge membrane assembly device arranged on the downstream of the bottom membrane assembly device along the steel shell conveying line and a discharging device. The bottom film assembling device comprises a bottom film cutting mechanism and a material taking actuator, the distance between the bottom film cutting mechanism and the material taking actuator can be adjusted synchronously, and the bottom film assembling device is used for cutting the strip-shaped bottom film into single bottom films and assembling the bottom films to steel shells on the steel shell conveying line at the adjustable distance. The edge film assembling device comprises an edge film winding mechanism and a lifting driving mechanism. Through the integrated layout, flexible adjustment and integrated forming technology, the battery steel shell bottom film and side film assembling device has the remarkable advantages in the aspects of improving the production efficiency, adapting to multi-specification production, guaranteeing the assembling precision, reducing manual dependence and the like, and an efficient solution is provided for automatic and high-precision assembling of a battery steel shell bottom film and a side film.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of battery manufacturing equipment, and particularly relates to an automatic assembly equipment for bottom film and edge film of a battery steel shell. BACKGROUND

[0002] In the field of battery manufacturing, the assembly of the bottom film and the edge film of the battery steel shell is a key process affecting the safety, sealing and electrochemical performance of the battery. The bottom film needs to be tightly attached to the bottom of the steel shell to isolate the electrode from the shell, and the edge film needs to form an insulating barrier around the inner wall of the steel shell. The assembly precision and consistency of the two directly relate to the service life and safety performance of the battery.

[0003] At present, the assembly process of the bottom film and the edge film in the industry generally has the following deficiencies: first, the assembly of the bottom film and the edge film is mostly carried out in a step-by-step production mode, and the processes of bottom film cutting, transfer, placement, edge film forming and sleeving are carried out separately, and the material turnover needs to be completed by manual or independent equipment, resulting in a long production process, high logistics cost, and the assembly precision is easily affected by positioning deviation at the process connection. Second, the spacing adjustment flexibility of the bottom film cutting and assembly is insufficient, and the spacing between the cutting mechanism and the material taking part of the traditional equipment is fixed. When facing different specifications of battery steel shells (especially when the spacing of the steel shells changes), special molds need to be replaced or complex mechanical adjustments need to be made, which takes a long time to change, and it is difficult to meet the flexible production demand of multiple varieties and small batches. Third, the continuity of the edge film forming and assembly is poor. In the prior art, the edge film is often preformed into a ring structure before being transferred and sleeved. The preformed ring is prone to deformation or wrinkling during storage or transfer due to external force, resulting in uneven fitting, edge lifting and other problems when sleeving into the steel shell, affecting the insulation effect. In addition, there are many manual intervention links, such as bottom film placement position calibration and edge film sleeving guidance, which rely on manual assistance, not only increasing labor costs, but also easily leading to product quality fluctuations due to operation differences, and it is difficult to meet the consistency requirements of large-scale automated production. SUMMARY

[0004] Therefore, the present application provides a battery edge and bottom film high-speed assembly line, aiming to realize efficient, accurate and flexible automatic assembly of the bottom film and the edge film of the battery steel shell.

[0005] The purpose of the present application is achieved by the following technical solutions: The application discloses a battery edge-bottom film high-speed assembly line, which comprises a feeding device for feeding battery steel shells to a steel shell conveying line, a steel shell conveying line for conveying the battery steel shells along an assembly station, a bottom film assembly device arranged along the steel shell conveying line, an edge film assembly device arranged downstream of the bottom film assembly device along the steel shell conveying line, and a discharging device for moving the assembled battery steel shells out of the conveying line, wherein the bottom film assembly device comprises a bottom film cutting mechanism with adjustable spacing and a material taking executor, which is used for cutting a strip-shaped bottom film into single bottom films and assembling the bottom films to the steel shells on the steel shell conveying line with adjustable spacing; and the edge film assembly device comprises an edge film winding mechanism and a lifting driving mechanism, which are used for winding a strip-shaped edge film into a ring and sleeving the ring into the steel shell with the assembled bottom film.

[0006] The application realizes high integration and automatic continuous production of battery steel shell bottom film and edge film assembly. The feeding device automatically feeds the steel shells to the conveying line, and then the conveying line sequentially conveys the steel shells to the predetermined bottom film assembly station and edge film assembly station, and finally the discharging device moves the finished products out of the line, forming a complete and smooth assembly assembly line. This integrated design effectively eliminates the frequent material turnover and station switching in traditional step-by-step assembly, significantly shortens the production rhythm, and improves the overall operation efficiency and capacity of the equipment. At the same time, continuous automatic operation reduces the dependence on manual operation, reduces the quality fluctuation and operation error risk caused by human factors, and improves the consistency and stability of the production process.

[0007] The core technical innovation lies in the specific design of the bottom film assembly device and the edge film assembly device and their cooperative working mode. The key of the bottom film assembly device lies in the bottom film cutting mechanism with adjustable spacing and the material taking executor. This design gives the equipment strong adaptability and flexibility. When different specifications of battery steel shells (especially different bottom sizes or arrangement spacings) need to be processed, the device can dynamically adjust the size of the bottom film cutting unit and the spacing of the material taking and placing, so as to accurately match the actual layout of the steel shells on the conveying line, thereby avoiding equipment downtime adjustment or tool replacement caused by product specification changes, greatly improving the universality and changeover efficiency of the equipment. The edge film assembly device adopts a unique winding ring and sleeving method, and the edge film winding mechanism and the lifting driving mechanism cooperate to efficiently and accurately form the required ring structure from the soft strip-shaped edge film, and accurately sleeve it into the steel shell with the assembled bottom film. Compared with the pasting or mechanical pressing method, this sleeving assembly method can better ensure the adhesion, uniformity and sealing of the edge film on the inner wall of the steel shell, and reduce the assembly stress, which helps to improve the reliability and safety of the final battery product. The close connection of the two key devices ensures the continuity and high precision of the bottom film and edge film assembly process.

[0008] Preferably, the bottom film assembly device comprises: a bottom film unwinding mechanism for conveying a belt-shaped bottom film; a cutting assembly comprising four groups of cutting units with adjustable spacing and a driving device; a spacing adjustment mechanism mechanically connected to the four groups of cutting units for synchronously driving the cutting units to change the spacing; a material taking executor arranged at the bottom of the cutting assembly, comprising four groups of negative pressure adsorption assemblies and being synchronously linked with the cutting units; wherein four steel shells arranged in parallel are conveyed in a steel shell conveying line, the spacing adjustment mechanism drives the four groups of cutting units to contract to a first spacing to perform cutting; after cutting is completed, the material taking executor adsorbs the bottom film, and the spacing adjustment mechanism drives the cutting units and the material taking executor to synchronously expand to a second spacing, which matches the spacing of adjacent steel shells on the steel shell conveying line.

[0009] The four-station parallel processing structure of the bottom film assembly device and its dynamic spacing adjustment process are described in detail. The use of four groups of cutting units and corresponding four groups of negative pressure adsorption assemblies can simultaneously cut and pick up four single bottom films from the belt-shaped bottom film, greatly improving the production efficiency of the bottom film assembly link. The core function of the spacing adjustment mechanism is to realize the synchronous spacing change of the cutting units and the material taking executor. In the cutting stage, all units contract to a smaller first spacing, which helps to arrange the cutting positions more compactly within the limited width of the belt-shaped bottom film, reducing the waste of bottom film material. After cutting is completed, the unit groups are synchronously expanded to a second spacing matching the spacing of the four parallel steel shells on the conveying line under the drive of the spacing adjustment mechanism, at which time the material taking executor adsorbing the bottom film can accurately place each single bottom film on the corresponding steel shell. This "first contraction and then expansion" linkage mechanism ingeniously combines the two steps of high-density cutting and placement matching the spacing of the station, ensuring high material utilization rate while realizing high-precision positioning of multi-station parallel assembly, significantly improving the efficiency and adaptability of the equipment, especially suitable for the needs of multi-row parallel production lines.

[0010] Preferably, the spacing adjustment mechanism comprises a linear slide rail assembly and a pneumatic piston mechanism, the four groups of cutting units are slidably installed on the linear slide rail assembly through sliders, and the output ends of the pneumatic piston mechanism are rigidly linked with the sliders.

[0011] The core components of the distance adjustment mechanism and their connection relationship are specifically defined, and its design brings significant mechanical performance advantages. The linear slide rail assembly is used as the guide basis to ensure that the movement trajectory of the 4 cutting units is highly accurate and stable in parallel during the distance change process. The low friction and high rigidity characteristics of the linear slide rail effectively prevent the unit group from deviating, shaking or jamming during movement, which is crucial to ensure cutting accuracy and the accuracy of the final bottom film placement position. The pneumatic piston mechanism serves as the driving source, providing fast, direct and easy-to-control linear motion output. Its output end is rigidly linked to each slider, which means that the movement of all cutting units is strictly synchronized and driven by the same power source, completely eliminating the out-of-sync problem that may be caused by multiple independent driving sources, ensuring the uniformity and consistency of the distance change of all stations. The characteristics of this rigid linkage combined with pneumatic driving make the distance adjustment action respond quickly and position reliably, efficiently completing the switch from the cutting distance to the placement distance to meet the production rhythm requirements. At the same time, the pneumatic system structure is relatively simple and easy to maintain, which helps to reduce the operation and maintenance cost of the equipment. Overall, the mechanism design provides a solid mechanical guarantee for the distance adjustment function of the bottom film assembly device in terms of precision, speed, synchronization and reliability.

[0012] Preferably, the negative pressure suction assembly is directly fixed to the bottom of the base of the cutting unit.

[0013] The specific installation method of the negative pressure suction assembly and the cutting unit is defined. The negative pressure suction assembly is directly fixed to the bottom of the base of the cutting unit, and this integrated design has significant practical advantages. First of all, it ensures that the suction assembly and the cutting unit above it maintain a strict alignment relationship in space. Since the two are rigidly connected as a whole, when the distance adjustment mechanism drives the cutting unit to move, the suction assembly below it must move synchronously and with the same displacement, completely avoiding the relative position deviation or lag that may be caused by independent installation. This inherent positional correlation greatly simplifies the control and calibration process of the equipment, eliminating the need for additional complex compensation mechanisms to ensure that the cut bottom film can be accurately picked up by the suction head directly below it. Secondly, this compact integrated approach reduces additional support structures and moving parts, making the entire material taking executor more compact and robust, reducing potential failure points caused by complex structures, and improving the rigidity and long-term operation stability of the system. Furthermore, direct fixation installation facilitates the centralized arrangement and management of vacuum pipelines, reducing the risk of pipeline entanglement or wear during movement. In summary, this design optimizes space utilization, enhances movement synchronization, and improves system reliability, which is a key detail in achieving seamless integration of cutting and picking.

[0014] Preferably, the first distance is less than the second distance, and the extension stroke of the distance adjustment mechanism covers a continuous variation range from the first distance to the second distance.

[0015] The key working parameter of the distance adjusting mechanism, the stroke range, is determined, and its design brings important flexibility and adaptability advantages. The first distance (cutting distance) is specified to be smaller than the second distance (placement distance), which conforms to the logic of material saving and process optimization: compact arrangement in the cutting stage can reduce the waste of bottom film corner materials; matching the actual distance of the steel shell in the placement stage ensures assembly accuracy. The more core advantage is that the extended stroke of the distance adjusting mechanism is designed to cover the continuous change range from the first distance to the second distance. This means that the mechanism cannot only switch at several fixed preset distance points, but also can realize stepless adjustment and accurate positioning at any distance between the first distance and the second distance. This continuous adjustable feature greatly widens the application range of the equipment. When the production line needs to handle products with different steel shell sizes or different steel shell arrangement distances, only the first distance (cutting size) and the second distance (target placement distance) need to be adjusted accordingly, and the distance adjusting mechanism can smoothly and accurately perform the required contraction and expansion actions. Without the need to replace mechanical parts or make complex mechanical adjustments, it can quickly adapt to the production needs of multiple specifications of products. This flexible design significantly reduces equipment changeover time, improves the utilization rate of the production line and the ability to respond to market changes, and is the key support for the equipment to have good universality and high multi-variety production capacity.

[0016] Preferably, the edge film assembling device comprises an edge film feeding mechanism for conveying the strip-shaped edge film; a winding core shaft arranged beside the edge film feeding mechanism for winding the strip-shaped edge film to form a ring-shaped edge film roll; a cutting mechanism arranged laterally at the connection between the ring-shaped edge film roll and the strip-shaped edge film for cutting the connection; a lifting driving mechanism connected with the winding core shaft for driving the winding core shaft to make lifting movement; and the winding core shaft is sleeved with the ring-shaped edge film roll wound thereon into the battery steel shell when descending.

[0017] The working process and core component functions of the edge film assembly device are described in detail. The design realizes the integration and automation of edge film forming and assembly. The edge film feeding mechanism stably supplies the strip-shaped edge film to the winding station. The core component winding mandrel is responsible for accurately winding the strip-shaped edge film one turn to form a ring-shaped roll of the required size and shape, which is a key forming step to ensure that the edge film is correctly fitted in the steel shell. The cutting mechanism quickly and accurately cuts off the connection between the ring-shaped roll and the strip-shaped raw material after the ring-shaped roll is formed, preparing for independent assembly. The most characteristic advantage of the entire device is the combination of the lifting drive mechanism and the winding mandrel: after the ring-shaped edge film roll is formed on the mandrel, it is not removed first and then assembled, but is directly lowered by the lifting drive mechanism. During the descent, the mandrel directly sleeves the ring-shaped edge film roll carried on it into the battery steel shell below which has been assembled with the bottom film. This continuous action design of "directly sleeving after winding and forming" avoids the operation of secondary transfer of the soft ring-shaped edge film roll. Secondary transfer is prone to cause deformation, displacement or damage of the edge film, affecting the assembly quality and efficiency. The direct sleeving method maximizes the protection of the formed state of the edge film, ensures that it can accurately enter the inside of the steel shell in the preset shape and size, greatly improves the success rate, precision and speed of assembly, and simplifies the mechanism and reduces potential failure links.

[0018] Preferably, the lifting drive mechanism includes a linear actuator and a support frame, the linear actuator is fixed on the support frame, the output end of the linear actuator is connected with the top of the winding mandrel, the support frame is provided with a lifting guide rail, and the winding mandrel or the output end of the linear actuator is in sliding fit with the lifting guide rail.

[0019] The composition of the lifting drive mechanism is embodied, and the design focuses on ensuring the stability and precision of the lifting motion. The support frame provides a solid and stable mounting base for the entire lifting mechanism, effectively resisting vibration and load changes during operation. The linear actuator (such as a pneumatic cylinder, hydraulic cylinder or electric push rod) serves as the power source, responsible for generating the linear motion required to drive the lifting of the winding mandrel. Fixing the linear actuator on the support frame makes its working state more stable. The core of precision guarantee lies in the setting of the lifting guide rail. The guide rail usually has a high-precision guide surface, and the output end of the winding mandrel or the actuator is in sliding fit with it through a slider or a guide block. This guide rail guiding method forcibly restricts the direction of the lifting motion, making it strictly maintain a vertical or pre-set straight line path, effectively preventing the winding mandrel from tilting, deviating or shaking during lifting. This is crucial to ensuring the accuracy of the sleeving action: the mandrel must be accurately centered with the battery steel shell below to smoothly sleeve the ring-shaped edge film roll without scratching, jamming or damaging the edge film. The presence of the guide rail greatly improves the rigidity and precision of the motion, maintaining stable and reliable operation even at high speed or under load changes, which is a key mechanical structure to ensure high success rate and high consistency of the edge film sleeving process.

[0020] Preferably, the cutting mechanism comprises a driving cylinder and a cutter, the cutting edge of the cutter is arranged towards the strip edge film conveying path between the winding mandrel and the edge film feeding mechanism.

[0021] The specific implementation of the cutting mechanism is defined, and the design pursues efficient, reliable and accurate cutting action. The driving cylinder as an actuator provides the required fast, direct linear driving force for cutting, with fast response speed, easy control, and is suitable for such actions that need instantaneous force. The cutter is the core component to realize the cutting function. The cutting edge of the cutter is arranged towards the strip edge film conveying path between the winding mandrel and the edge film feeding mechanism, which means that the cutter is accurately positioned at the position where cutting is needed, i.e. the connection between the just completed annular edge film roll and the strip edge film raw material conveyed by the feeding mechanism. This targeted position design ensures that the cutting action can accurately act on the target point, avoiding cutting other parts or incomplete cutting. The driving cylinder pushes the cutter to quickly and cleanly cut the strip edge film at the connection. This mechanical cutting method usually has less heat impact on the edge film material than heat cutting, and is especially suitable for heat-sensitive materials. The cutter structure driven by the cylinder is relatively simple, easy to maintain, reliable in action and sufficient in cutting force, which can effectively cope with strip edge films of different materials and thicknesses, ensuring the stability and efficiency of the cutting process in continuous production, and is a necessary link to ensure that the annular edge film roll can smoothly proceed to the subsequent sleeving step.

[0022] Preferably, the edge film feeding mechanism comprises a unwinding roller and at least one tensioning roller, and the strip edge film extends to the winding mandrel after passing through the unwinding roller and the tensioning roller in turn.

[0023] The basic composition of the edge film feeding mechanism is described, and the core of the design is to ensure the stability and tension control of the strip edge film conveying. The unwinding roller carries the strip edge film material, which is the supply source of the raw material. The setting of at least one tensioning roller is the key advantage of the mechanism. The strip edge film needs to pass through the tensioning roller during the conveying process from the unwinding roller to the winding mandrel. The function of the tensioning roller is to change the wrap angle path of the edge film and to apply a certain tension to the edge film during its working process (which can be fixed or equipped with a tension adjusting mechanism). This tension control is crucial: appropriate tension can avoid the edge film from relaxing, sagging or wrinkling during conveying, ensuring that the edge film can be flat and smooth into the winding mandrel for winding. Flat and wrinkle-free edge film is a prerequisite for winding into a regular and uniform annular roll. If the edge film is relaxed or wrinkled, the shape of the annular roll will be irregular, directly affecting the quality and success rate of the subsequent sleeving into the steel shell. The presence of the tensioning roller, even the simplest fixed type, can provide basic path constraint and moderate tension, significantly improving the conveying state of the edge film and laying the foundation for high-quality winding formation. This structure is simple and effective, and is a basic design to ensure stable and reliable edge film feeding.

[0024] Preferably, the linear drive is a hydraulic cylinder, a pneumatic cylinder or an electric push rod.

[0025] Having identified the alternative types of linear drive in the lifting drive mechanism, the advantage lies in providing the device with diversified driving scheme options to adapt to different application scenarios and requirements. Listing hydraulic cylinders, pneumatic cylinders and electric push rods as alternative options means that device designers or users can make optimal choices according to specific working conditions. Pneumatic cylinders utilize compressed air, usually with the advantages of simple structure, low cost, fast action speed, easy maintenance and clean working environment (no oil), suitable for occasions requiring fast response and general load. Hydraulic cylinders utilize hydraulic oil, can provide greater driving force and smoother movement, have excellent load capacity and speed control characteristics, suitable for heavy load applications that need to overcome greater resistance or require precise speed control. Electric push rods adopt motor drive (usually with screw or gear rack, etc.), can realize precise position control and programmable motion curve, have the advantages of relatively low noise, no fluid leakage risk, easy to realize complex control, suitable for occasions with high requirements for positioning accuracy and intelligent control. Providing these three mature and widely used driving technology options enhances the flexibility of device design and the adaptability to different user site conditions (such as air supply, power supply, load requirements, control accuracy, cost budget), helping the device to be deployed and used in a wider range of production environments.

[0026] Preferably, the feeding device includes a linear feeding track and a pneumatic manipulator, and the discharging device includes a rotating gripper and a translational slide.

[0027] The core component of the feeding and discharging device is embodied, and the design focuses on realizing efficient and reliable automatic handling of the steel shell. The feeding device adopts a combination of a linear feeding track and a pneumatic manipulator. The linear feeding track (such as a vibrating disc discharge track or a belt / chain conveyor) can arrange and orient the scattered or stacked battery steel shells at a fixed distance and continuously convey them to the predetermined pickup position, providing a stable source for automatic feeding. The pneumatic manipulator is responsible for accurately grabbing individual or grouped steel shells from the end or designated position of the track, and placing them quickly and smoothly at the starting position of the steel shell conveying line. Pneumatic drive is fast in response, low in cost and compact in structure, and is very suitable for this repetitive point-to-point handling operation. The discharging device adopts a combination of a rotating gripper and a translational slide. When the assembled battery steel shell reaches the end of the conveying line, the rotating gripper is responsible for reliably grabbing the finished product. The translational slide (usually driven by a motor or air cylinder) provides horizontal movement capability, moving the gripper and the grabbed finished product out of the main area of the conveying line. The design of the rotating gripper usually allows it to adjust the posture of the finished product (such as rotating by a certain angle) during handling, facilitating the placement of the finished product on the tray, conveyor belt or other subsequent processing equipment in the appropriate orientation. This combination realizes the automatic transfer of the finished product from the end of the production line to the designated discharging point. This structural design of the feeding and discharging device ensures the automatic and efficient flow of the steel shell at the inlet and outlet of the equipment, seamlessly connects with the main assembly line, reduces manual intervention, improves the degree of automation and production rhythm of the whole line, and is an indispensable part of the complete automated production line.

[0028] The beneficial effects of the present application compared to the prior art are: The battery edge and bottom film high-speed assembly line provided by the present application effectively solves the problems of low efficiency, poor flexibility, insufficient precision and the like in traditional processes through integrated design and core mechanism innovation, and has the following specific advantages: 1. Realize full-process automatic continuous production, significantly improve production efficiency. The device integrates complete processes such as feeding, steel shell conveying, bottom film assembly, edge film assembly and discharging, forming a coherent assembly line. The steel shell is automatically fed into the steel shell conveying line by the feeding device, sequentially passes through the bottom film assembly station and the edge film assembly station, and is finally removed by the discharging device, without manual intervention or material turnover between processes. This integrated design greatly shortens the production rhythm, avoids time waste caused by waiting and transfer in step-by-step operation, realizes continuous assembly of bottom film and edge film, and effectively improves the overall productivity and operating efficiency of the device.

[0029] 2. The bottom film assembly device has flexible spacing adjustment capability to adapt to the production requirements of multiple specifications. The bottom film assembly device uses a cutting mechanism with synchronous spacing adjustment and a material taking executor. The two are mechanically linked to achieve dynamic adjustment of the spacing. In the cutting stage, the cutting mechanism is retracted to a compact spacing to efficiently utilize the strip-shaped bottom film material and reduce waste. After cutting is completed, the material taking executor adsorbs the bottom film and expands synchronously with the cutting mechanism to a position matching the spacing of the steel shell on the steel shell conveying line, accurately completing the placement of the bottom film. This "cutting-material taking-spacing adjustment" linkage mechanism enables the device to adapt to different steel shell spacing production requirements without changing molds, significantly shortening product changeover time, improving the device's adaptability to multiple battery steel shell varieties, and meeting the practical application scenarios of flexible production.

[0030] 3. The edge film is wound and formed in an integrated manner to improve assembly precision and reliability. The edge film assembly device innovatively uses a process of directly sleeving after winding into a ring. The strip-shaped edge film transported by the edge film feeding mechanism is wound into a ring-shaped structure by the winding mechanism. After forming, the lifting driving mechanism drives the winding core shaft to descend, directly sleeving the ring-shaped edge film roll into the steel shell with the assembled bottom film. This design eliminates the secondary transfer step of the ring-shaped edge film in the traditional process, avoiding deformation, wrinkles or positioning deviation that may occur during the transfer process, ensuring that the edge film adheres to the inner wall of the steel shell in a regular shape. At the same time, the guiding effect of the winding core shaft makes the edge film sleeving process stable and controllable, effectively improving the adhesion and sealing of the edge film and the inner wall of the steel shell, providing protection for the insulation performance and structural reliability of the battery.

[0031] 4. High degree of automation, reduces dependence on manual operation and improves product consistency. The device uses automatic control for each mechanism. The feeding device achieves directional conveying of the steel shell through mechanical structure. The synchronous linkage of bottom film cutting and material taking, and the precise cooperation of edge film winding and sleeving are completed by program control, reducing manual operation throughout. This not only reduces labor costs, but also avoids random errors that may be introduced by manual operation, significantly improving the consistency of key parameters such as bottom film placement position and edge film sleeving depth, effectively reducing product quality fluctuations, and providing stable process protection for large-scale standardized production.

[0032] In summary, the present application uses integrated layout, flexible adjustment and integrated forming technology to improve production efficiency, adapt to multiple specifications, ensure assembly precision and reduce dependence on manual operation, etc., and provides an efficient solution for the automatic and high-precision assembly of battery steel shell bottom film and edge film. BRIEF DESCRIPTION OF DRAWINGS

[0033] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments. It should be understood that the following drawings only show some of the embodiments of the present application, and therefore should not be regarded as limiting the scope. For those skilled in the art, other related drawings can also be obtained without creative labor on the basis of these drawings.

[0034] Figure 1 The structural diagram of the battery edge and bottom film high-speed assembly line according to an embodiment of the present application.

[0035] Figure 2 The structural diagram of the bottom film assembly device according to an embodiment of the present application.

[0036] Figure 3 The structural diagram of the edge film assembly device according to an embodiment of the present application.

[0037] Label explanation: 1000 bottom film assembly device, 1100 bottom film unwinding mechanism, 1200 cutting assembly, 1210 cutting unit, 1300 spacing adjustment mechanism, 1310 linear slide rail assembly, 1320 pneumatic piston mechanism, 1400 material taking executor, 1410 negative pressure adsorption assembly. 2000 edge film assembly device, 2100 edge film feeding mechanism, 2110 unwinding roller, 2120 tensioning roller, 2200 winding core shaft, 2300 cutting mechanism, 2310 driving cylinder, 2320 cutter, 2400 lifting driving mechanism, 2410 linear driver, 2420 support frame. 3000 feeding device, 3100 linear feeding track, 3200 pneumatic manipulator. 4000 discharging device, 4100 rotating clamping jaw, 4200 translation slide. 5000 steel shell conveying line. DETAILED DESCRIPTION

[0038] In order to make the purpose, technical solutions and advantages of the embodiments of the present application more clear, the following will combine the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are some of the embodiments of the present application, not all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0039] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0040] It should be noted that similar reference numbers and letters represent similar items in the following drawings, and therefore, once an item is defined in one drawing, it need not be further defined and explained in subsequent drawings. In the description of the embodiments of the present application, it should be understood that the terms "upper", "lower", "left", "right", "vertical", "horizontal", and the like, indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship commonly understood by those skilled in the art, and are only for the convenience of describing the present application and simplifying the description, and are not intended to indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0041] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict.

[0042] The technical solutions in the present application will be described below with reference to the drawings.

[0043] The present embodiment provides a battery side and bottom film high-speed assembly line, which comprises a feeding device 3000 for conveying battery steel shells to a steel shell conveying line 5000, the steel shell conveying line 5000 for conveying the battery steel shells along an assembly station, a bottom film assembly device 1000 arranged along the steel shell conveying line 5000, a side film assembly device 2000 arranged downstream of the bottom film assembly device 1000 along the steel shell conveying line 5000, and a discharging device 4000 for moving the assembled battery steel shells out of the conveying line, the bottom film assembly device 1000 comprises a bottom film cutting mechanism 1200 and a material taking executor 1400 with adjustable spacing, for cutting a strip-shaped bottom film into single bottom films and assembling the bottom films to the steel shells on the steel shell conveying line 5000 with adjustable spacing; the side film assembly device 2000 comprises a side film winding mechanism 2200 and a lifting driving mechanism 2400, for winding a strip-shaped side film into a ring and sleeving it into the steel shell with the assembled bottom film.

[0044] The height integration and automatic continuous production of the assembly of the bottom film and the side film of the battery steel shell are realized. The steel shells are automatically supplied to the conveying line by the feeding device 3000, and then the steel shells are sequentially conveyed to the predetermined bottom film assembly station and the side film assembly station by the conveying line, and finally the finished products are moved out by the discharging device 4000, forming a complete and smooth assembly assembly line. This integrated design effectively eliminates the frequent material turnover and station switching in the traditional step-by-step assembly, significantly shortens the production rhythm, and improves the overall operation efficiency and capacity of the equipment. At the same time, the continuous automatic operation reduces the dependence on manual operation, reduces the quality fluctuation and operation error risk caused by human factors, and improves the consistency and stability of the production process.

[0045] The core technology innovation lies in the specific design of the bottom film assembly device 1000 and the edge film assembly device 2000 and their cooperative working mode. The key of the bottom film assembly device 1000 lies in the bottom film cutting mechanism 1200 and the material taking executor 1400, whose spacing can be adjusted synchronously. This design gives the equipment strong adaptability and flexibility. When different specifications of battery steel shells need to be processed (especially different bottom sizes or arrangement spacings), the device can dynamically adjust the size of the cutting bottom film unit and the spacing of the material taking and placing, so as to accurately match the actual layout of the steel shells on the conveying line, thereby avoiding equipment downtime adjustment or tooling replacement due to product specification changes, greatly improving the universality and changeover efficiency of the equipment. The edge film assembly device 2000 adopts a unique winding into a ring and sleeving method. The edge film winding mechanism 2200 and the lifting driving mechanism 2400 cooperate to efficiently and accurately form the soft strip-shaped edge film into the required ring structure and accurately sleeve it into the steel shell that has been assembled with the bottom film. Compared with the pasting or mechanical pressing methods, this sleeving assembly method can better ensure the adhesion, uniformity and sealing of the edge film on the inner wall of the steel shell, while reducing the assembly stress, which helps to improve the reliability and safety of the final battery product. The close connection of the two key devices ensures the continuity and high precision of the bottom film and edge film assembly process.

[0046] In the embodiment, the bottom film assembly device 1000 comprises a bottom film unwinding mechanism 1100 for conveying a strip-shaped bottom film; a cutting assembly 1200 comprising four groups of cutting units 1210 with adjustable spacing and a driving device; a spacing adjustment mechanism 1300 mechanically connected with the four groups of cutting units 1210 for synchronously driving the cutting units 1210 to change the spacing; and a material taking executor 1400 arranged at the bottom of the cutting assembly 1200, comprising four groups of negative pressure adsorption assemblies 1410 and being synchronously linked with the cutting units 1210. In the steel shell conveying line 5000, four parallel arranged steel shells are conveyed, the spacing adjustment mechanism 1300 drives the four groups of cutting units 1210 to contract to a first spacing for cutting; after the cutting is completed, the material taking executor 1400 adsorbs the bottom film, and the spacing adjustment mechanism 1300 drives the cutting units 1210 and the material taking executor 1400 to expand synchronously to a second spacing, which matches the spacing of the adjacent steel shells on the steel shell conveying line 5000.

[0047] The four-station parallel processing structure of the bottom film assembly device 1000 and its dynamic spacing adjustment process are described in detail. The use of four sets of cutting units 1210 and corresponding four sets of negative pressure suction assemblies 1410 enables simultaneous cutting and picking up of four single bottom films from the strip-shaped bottom film, greatly improving the production efficiency of the bottom film assembly link. The core function of the spacing adjustment mechanism 1300 is to achieve synchronous spacing changes of the cutting units 1210 and the material taking actuators 1400. In the cutting stage, all units are contracted to a smaller first spacing, which helps to arrange the cutting positions more compactly within the limited width of the strip-shaped bottom film, reducing the waste of bottom film material. After cutting is completed, the unit groups are synchronously expanded to a second spacing matching the spacing of the four parallel steel shells on the conveying line under the drive of the spacing adjustment mechanism 1300, at which point the material taking actuators 1400 with the suctioned bottom film can accurately place each single bottom film onto the corresponding steel shell. This "first contraction and then expansion" linkage mechanism ingeniously combines high-density cutting with placement at a matching station spacing, ensuring high material utilization while achieving high-precision positioning for multi-station parallel assembly, significantly improving the efficiency and adaptability of the equipment, especially suitable for the needs of multi-column parallel production lines.

[0048] In this embodiment, the spacing adjustment mechanism 1300 includes a linear slide rail assembly 1310 and a pneumatic piston mechanism 1320, and the four sets of cutting units 1210 are slidably installed on the linear slide rail assembly 1310 through sliders, and the output end of the pneumatic piston mechanism 1320 is rigidly linked with each slider.

[0049] The core components of the spacing adjustment mechanism 1300 and their connection relationship are specifically defined, and their design brings significant mechanical performance advantages. The linear slide rail assembly 1310 is used as the guiding basis, ensuring that the movement trajectory of the four sets of cutting units 1210 is highly accurate and stable in parallel during spacing changes. The low-friction and high-rigidity characteristics of the linear slide rail 1310 effectively prevent the unit groups from shifting, shaking or jamming during movement, which is crucial for ensuring cutting accuracy and the accuracy of the final bottom film placement position. The pneumatic piston mechanism 1320 serves as the driving source, providing fast, direct and easy-to-control linear motion output. The design of its output end rigidly linked with each slider means that the movement of all cutting units 1210 is strictly synchronized and driven by the same power source, completely eliminating the out-of-sync problem that may be caused by multiple independent driving sources, ensuring the uniformity and consistency of spacing changes of all stations. The characteristics of rigid linkage combined with pneumatic driving make the spacing adjustment action responsive and positioning reliable, efficiently completing the switching from the cutting spacing to the placement spacing to meet the production rhythm requirements. At the same time, the pneumatic system structure is relatively simple and easy to maintain, which helps to reduce the operation and maintenance costs of the equipment. Overall, the mechanism design provides a solid mechanical guarantee for the spacing adjustment function of the bottom film assembly device 1000 in terms of accuracy, speed, synchronization and reliability.

[0050] In the present embodiment, the negative pressure suction assembly 1410 is directly fixed to the base bottom of the cutting unit 1210.

[0051] The specific mounting manner of the negative pressure suction assembly 1410 and the cutting unit 1210 is defined. Directly fixing the negative pressure suction assembly 1410 to the base bottom of the cutting unit 1210 has significant practical advantages. First, it ensures that the suction assembly and the cutting unit 1210 above it maintain a strict alignment relationship in spatial position. Since the two are rigidly connected as a whole, when the spacing adjustment mechanism 1300 drives the cutting unit 1210 to move, the suction assembly 1410 below it must follow the movement synchronously and with the same displacement, completely avoiding the relative position deviation or lag that may be caused by independent installation. This inherent positional correlation greatly simplifies the control and calibration process of the equipment, and there is no need for additional complex compensation mechanisms to ensure that the cut bottom film can be accurately picked up by the suction head directly below it. Second, this compact integrated approach reduces additional support structures and moving parts, making the entire material taking executor 1400 more compact and robust in structure, reducing potential failure points caused by complex structure, and improving the rigidity and long-term operation stability of the system. Third, direct fixation and installation facilitate the centralized arrangement and management of vacuum pipelines, reducing the risk of pipeline entanglement or wear during movement. In summary, this design optimizes space utilization, strengthens movement synchronization, and improves system reliability, and is a key detail in realizing seamless connection between cutting and picking.

[0052] In the present embodiment, the first spacing is smaller than the second spacing, and the extended stroke of the spacing adjustment mechanism 1300 covers the continuous variation range from the first spacing to the second spacing.

[0053] The key working parameter of the distance adjusting mechanism 1300, the stroke range, is determined, and its design brings important flexibility and adaptability advantages. The first distance (cutting distance) is less than the second distance (placement distance), which meets the logic of material saving and process optimization: compact arrangement in the cutting stage can reduce the waste of bottom film corner materials; matching the actual distance of the steel shell in the placement stage ensures assembly accuracy. The more core advantage is that the extended stroke design of the distance adjusting mechanism 1300 covers a continuous change range from the first distance to the second distance. This means that the mechanism cannot only switch at several fixed preset distance points, but also can realize stepless adjustment and accurate positioning at any distance between the first distance and the second distance. This continuous adjustable feature greatly widens the application range of the equipment. When the production line needs to handle products with different steel shell sizes or different steel shell arrangement distances, only the first distance (cutting size) and the second distance (target placement distance) need to be adjusted accordingly, and the distance adjusting mechanism 1300 can smoothly and accurately perform the required contraction and expansion actions. Without the need to replace mechanical parts or make complex mechanical adjustments, it can quickly adapt to the production needs of multiple specifications of products. This flexible design significantly reduces equipment changeover time, improves the utilization rate of the production line and the ability to respond to market changes, and is the key support for the equipment to have good universality and high multi-variety production capacity.

[0054] In the embodiment, the edge film assembly device 2000 comprises an edge film feeding mechanism 2100 for conveying the strip-shaped edge film; a winding core shaft 2200 arranged beside the edge film feeding mechanism 2100 for winding the strip-shaped edge film to form an annular edge film roll; a cutting mechanism 2300 arranged laterally at the connection between the annular edge film roll and the strip-shaped edge film for cutting the connection; a lifting driving mechanism 2400 connected with the winding core shaft 2200 for driving the winding core shaft 2200 to make lifting movement; and the winding core shaft 2200 is lowered to put the annular edge film roll wound thereon into the battery steel shell.

[0055] The working flow and core component functions of the edge film assembly device 2000 are described in detail, and the design realizes the integration and automation of edge film forming and assembly. The edge film feeding mechanism 2100 stably supplies the strip-shaped edge film to the winding station. The core component winding mandrel 2200 is responsible for accurately winding the strip-shaped edge film one turn to form a ring-shaped roll of the required size and shape, which is a key forming step to ensure that the edge film is correctly fitted in the steel shell. The cutting mechanism 2300 quickly and accurately cuts the connection between the ring-shaped roll and the strip-shaped raw material after the ring-shaped roll is formed, preparing for independent assembly. The most characteristic advantage of the whole device is the combination of the lifting drive mechanism 2400 and the winding mandrel 2200: after the ring-shaped edge film roll is formed on the mandrel 2200, the mandrel 2200 is not removed first and then assembled, but the whole mandrel 2200 is directly lowered by the lifting drive mechanism 2400. During the descending process, the mandrel 2200 directly sleeves the ring-shaped edge film roll carried thereon into the battery steel shell below which has been assembled with the bottom film. This continuous action design of "directly sleeving after winding and forming" avoids the operation of secondary transfer of the soft ring-shaped edge film roll. Secondary transfer is prone to cause deformation, displacement or damage of the edge film, affecting the assembly quality and efficiency. The direct sleeving method maximizes the protection of the formed state of the edge film, ensures that it can accurately enter the inside of the steel shell with the preset shape and size, greatly improves the success rate, precision and speed of assembly, and simplifies the mechanism and reduces potential failure links.

[0056] In the present embodiment, the lifting drive mechanism 2400 includes a linear actuator 2410 and a support frame 2420, the linear actuator 2410 is fixed on the support frame 2420, the output end of the linear actuator 2410 is connected with the top of the winding mandrel 2200, the support frame 2420 is provided with a lifting guide rail, and the winding mandrel 2200 or the output end of the linear actuator 2410 is in sliding fit with the lifting guide rail.

[0057] The composition of the lifting drive mechanism 2400 is embodied, and its design focuses on ensuring the stability and precision of the lifting movement. The support frame 2420 provides a solid and stable mounting base for the entire lifting mechanism, effectively resisting vibration and load changes during work. The linear drive 2410 (such as a pneumatic cylinder, hydraulic cylinder, or electric push rod) serves as the power source, responsible for generating the linear motion required to drive the winding mandrel 2200 to lift. The linear drive 2410 is fixed to the support frame 2420 to make its working state more stable. The core of precision lies in the setting of the lifting guide rail. The guide rail usually has a high-precision guide surface, and the output end of the winding mandrel 2200 or the linear drive 2410 is slidably connected with it through a slider or a guide block. This guide rail guiding method forcibly restricts the direction of the lifting movement, making it strictly maintain a vertical or pre-set straight line path, effectively preventing the winding mandrel 2200 from tilting, deviating or shaking during lifting. This is crucial to ensure the accuracy of the sleeving action: the mandrel 2200 must be accurately centered with the battery steel shell below to smoothly sleeve the annular edge film without scratching, jamming or damaging the edge film. The presence of the guide rail greatly improves the rigidity of the movement and the accuracy of the guide, maintaining smooth and reliable operation even at high speed or under load changes, and is the key mechanical structure to ensure high success rate and high consistency of the edge film sleeving process.

[0058] In this embodiment, the cutting mechanism 2300 includes a driving cylinder 2310 and a cutter 2320, and the cutting edge of the cutter 2320 is arranged towards the belt-shaped edge film conveying path between the winding mandrel 2200 and the edge film feeding mechanism 2100.

[0059] The specific implementation of the cutting mechanism 2300 is designed to pursue efficient, reliable and precise cutting action. The driving cylinder 2310 serves as an actuator, providing the required fast and direct linear driving force for cutting, with fast response speed and easy control, suitable for such actions that require instantaneous force. The cutting knife 2320 is the core component that realizes the cutting function. The cutting knife 2320 is positioned at the location where the cutting is needed, i.e. the connection between the just completed winding of the annular edge film roll and the raw material of the strip-shaped edge film delivered by the feeding mechanism. This targeted position design ensures that the cutting action can accurately act on the target point, avoiding cutting other parts or incomplete cutting. The driving cylinder 2310 pushes the cutting knife 2320 to quickly and cleanly cut the strip-shaped edge film at the connection. This mechanical cutting method generally has less heat impact on the edge film material than heat cutting, and is particularly suitable for heat-sensitive materials. The cylinder-driven cutting knife 2320 structure is relatively simple, easy to maintain, reliable in action and sufficient in cutting force, which can effectively deal with edge film of different materials and thicknesses, ensuring the stability and efficiency of the cutting process in continuous production, and is a necessary link to ensure the smooth independent of the annular edge film roll in the subsequent sleeving step.

[0060] In this embodiment, the edge film feeding mechanism 2100 includes a unwinding roller 2110 and at least one tensioning roller 2120, and the strip-shaped edge film extends to the winding mandrel 2200 after passing through the unwinding roller 2110 and the tensioning roller 2120 in turn.

[0061] The basic structure of the edge film feeding mechanism 2100 is described, and the core of the design is to ensure the stability and tension control of the strip-shaped edge film delivery. The unwinding roller 2110 carries the strip-shaped edge film material, which is the raw material supply source. The provision of at least one tensioning roller 2120 is a key advantage of the mechanism. The strip-shaped edge film needs to pass through the tensioning roller 2120 during the delivery from the unwinding roller 2110 to the winding mandrel 2200. The tensioning roller 2120 changes the wrapping angle path of the edge film and applies a certain tension to the edge film during its operation (which can be fixed or equipped with a tension adjusting mechanism). This tension control is crucial: appropriate tension can prevent the edge film from relaxing, sagging or wrinkling during delivery, ensuring that the edge film can be wound smoothly and evenly into the winding mandrel 2200. Smooth and wrinkle-free edge film is a prerequisite for winding into a regular and uniform annular roll. If the edge film is loose or wrinkled, the shape of the annular roll will be irregular, directly affecting the quality and success rate of the subsequent sleeving into the steel shell. The presence of the tensioning roller 2120, even the simplest fixed type, can provide basic path constraint and moderate tension, significantly improving the delivery state of the edge film and laying the foundation for high-quality winding formation. This structure is simple and effective, and is a basic design to ensure stable and reliable edge film feeding.

[0062] In this embodiment, the linear drive 2410 is a hydraulic cylinder, a pneumatic cylinder, or an electric push rod.

[0063] Having identified the alternative types of linear drive 2410 in the lifting drive mechanism 2400, the advantage lies in providing the device with diversified driving scheme options to adapt to different application scenarios and requirements. Listing hydraulic cylinders, pneumatic cylinders, and electric push rods as alternative options means that device designers or users can make optimal choices according to specific working conditions. Pneumatic cylinders utilize compressed air, usually with the advantages of simple structure, low cost, fast action speed, easy maintenance, and clean working environment (no oil), suitable for occasions requiring fast response and general load. Hydraulic cylinders utilize hydraulic oil, can provide greater driving force and smoother motion, have excellent load capacity and speed control characteristics, suitable for heavy load applications that need to overcome greater resistance or require precise speed control. Electric push rods adopt motor drive (usually with screw or rack and pinion, etc.), can realize precise position control and programmable motion curve, have the advantages of relatively low noise, no fluid leakage risk, easy to realize complex control, suitable for occasions with high requirements for positioning accuracy and intelligent control. Providing these three mature and widely used driving technology options enhances the flexibility of device design and the adaptability to different user site conditions (such as air supply, power supply, load requirements, control accuracy, cost budget), helping the device to be deployed and used in a wider range of production environments.

[0064] In this embodiment, the feeding device 3000 includes a linear feeding track 3100 and a pneumatic manipulator 3200, and the discharging device 4000 includes a rotating gripper 4100 and a translation slide 4200.

[0065] The core components of the feeding and discharging device are embodied, and the design focuses on achieving efficient and reliable automated handling of steel shells. The feeding device 3000 adopts a combination of a linear feeding track 3100 and a pneumatic manipulator 3200. The linear feeding track 3100 (such as a vibrating disc discharge track or a belt / chain conveyor) can arrange and orient the scattered or stacked battery steel shells, and continuously convey them to the predetermined pickup position at a fixed distance, providing a stable source for automated feeding. The pneumatic manipulator 3200 is responsible for accurately grabbing individual or grouped steel shells from the end or designated position of the track, and placing them quickly and smoothly at the starting position of the steel shell conveying line 5000. Pneumatic drive is fast in response, low in cost and compact in structure, and is very suitable for this repetitive point-to-point handling operation. The discharging device 4000 adopts a combination of a rotating gripper 4100 and a translation slide 4200. When the assembled battery steel shell reaches the end of the conveying line, the rotating gripper 4100 is responsible for reliably grabbing the finished product. The translation slide 4200 (usually driven by a motor or air cylinder) provides horizontal movement capability, moving the gripper and the grabbed finished product out of the main area of the conveying line. The design of the rotating gripper 4100 usually allows it to adjust the attitude of the finished product (such as rotating by a certain angle) during handling, facilitating the placement of the finished product on the tray, conveyor belt or other subsequent processing equipment in the appropriate orientation. This combination realizes the automated transfer of the finished product from the end of the production line to the designated discharging point. This structural design of the feeding and discharging device ensures the automated and efficient flow of steel shells at the inlet and outlet of the equipment, seamlessly connects with the main assembly line, reduces manual intervention, and improves the degree of automation and production rhythm of the entire line. It is an indispensable part of a complete automated production line.

[0066] Although embodiments of the present application have been shown and described, it is to be understood that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A battery edge underfilm high-speed assembly line, characterized by, The application relates to a battery steel shell assembly device, which comprises an upper feeding device (3000) for feeding battery steel shells to a steel shell conveying line, a steel shell conveying line (5000) for conveying the battery steel shells along an assembly station, a bottom film assembling device (1000) arranged along the steel shell conveying line (5000), an edge film assembling device (2000) arranged downstream of the bottom film assembling device along the steel shell conveying line (5000), and a lower feeding device (4000) for moving the assembled battery steel shells out of the conveying line, wherein the bottom film assembling device (1000) comprises a bottom film cutting mechanism and a material taking executor (1400) with adjustable intervals, which are used for cutting a strip-shaped bottom film into single bottom films and assembling the bottom films on the steel shells on the steel shell conveying line with adjustable intervals; and the edge film assembling device (2000) comprises an edge film winding mechanism and a lifting driving mechanism (2400), which are used for winding a strip-shaped edge film into a ring and sleeving the ring into the steel shells with assembled bottom films.

2. The battery edge-bottom film high-speed assembly line according to claim 1, wherein, The bottom film assembling device (1000) comprises: a bottom film unwinding mechanism (1100) for conveying a strip-shaped bottom film; a cutting assembly (1200) comprising four groups of cutting units (1210) with adjustable intervals and a driving device; an interval adjusting mechanism (1300) mechanically connected with the four groups of cutting units (1210) and used for synchronously driving the cutting units to change the intervals; a material taking executor (1400) arranged at the bottom of the cutting assembly (1200) and comprising four groups of negative pressure adsorption assemblies (1410) and being synchronously linked with the cutting units (1210).

3. The battery edge-bottom film high-speed assembly line according to claim 2, characterized in that, The interval adjusting mechanism (1300) comprises a linear slide rail assembly (1310) and a pneumatic piston mechanism (1320), the four groups of cutting units (1210) are slidably installed on the linear slide rail assembly (1310) through sliders, and the output end of the pneumatic piston mechanism (1320) is rigidly linked with each slider.

4. The battery edge-bottom film high-speed assembly line according to claim 2, wherein, The negative pressure adsorption assembly (1410) is directly fixed on the bottom of the base of the cutting unit (1210).

5. The battery edge-bottom film high-speed assembly line according to claim 2, wherein, The first interval is smaller than the second interval, and the expansion stroke of the interval adjusting mechanism (1300) covers the continuous change range from the first interval to the second interval.

6. The battery edge-bottom film high-speed assembly line according to claim 1, wherein, The edge film assembling device (2000) comprises an edge film feeding mechanism (2100) for conveying a strip-shaped edge film; a winding mandrel (2200) arranged beside the edge film feeding mechanism (2100) and used for winding the strip-shaped edge film for one turn to form a ring-shaped edge film roll; a cutting mechanism (2300) arranged at the side of the connection between the ring-shaped edge film roll and the strip-shaped edge film and used for cutting the connection; a lifting driving mechanism (2400) connected with the winding mandrel (2200) and used for driving the winding mandrel (2200) to move up and down.

7. The battery edge-bottom film high-speed assembly line according to claim 6, wherein, The lifting driving mechanism (2400) comprises a linear driver (2410) and a support frame (2420), the linear driver (2410) is fixed on the support frame (2420), the output end of the linear driver (2410) is connected with the top of the winding mandrel (2200), the support frame (2420) is provided with lifting guide rails, and the output end of the winding mandrel (2200) or the linear driver (2410) is slidably matched with the lifting guide rails.

8. The battery edge-bottom film high-speed assembly line according to claim 6, wherein, The cutting mechanism (2300) comprises a driving cylinder (2310) and a cutter (2320), and the cutting edge of the cutter (2320) is arranged towards the strip-shaped edge film conveying path between the winding core shaft (2200) and the edge film feeding mechanism (2100).

9. The battery edge-bottom film high-speed assembly line according to claim 6, wherein, The edge film feeding mechanism (2100) comprises a pay-off roller (2110) and at least one tensioning roller (2120), and the strip-shaped edge film extends to the winding core shaft (2200) after sequentially passing through the pay-off roller (2110) and the tensioning roller (2120).

10. The battery edge-bottom film high-speed assembly line according to claim 1, wherein, The feeding device (3000) comprises a linear feeding track (3100) and a pneumatic manipulator (3200), and the discharging device (4000) comprises a rotating gripper (4100) and a translational slide (4200).

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