Semi-finished product lithium battery paper pasting and film sleeving all-in-one machine

Abstract

The invention discloses a paper pasting and film sleeving all-in-one machine for a semi-finished lithium battery. The paper pasting and film sleeving all-in-one machine comprises a machine box, a linear conveying device, a paper pasting device, a film sleeving device and a hot air tightening device, the paper pasting devices, the film sleeving device and the hot air tightening device are sequentially arranged in the conveying direction of the linear conveying device, and the two paper pasting devices are arranged in a staggered mode in the conveying direction. The equipment further comprises a control system used for controlling all the devices to work cooperatively. The three key procedures of end face paper pasting, peripheral wall film sleeving and hot air tightening of the lithium battery are integrated into one device, continuous automatic production is achieved through linear conveying, the problem of low efficiency caused by circulation and repeated positioning among multiple devices is effectively solved, the production takt is remarkably shortened, the overall occupied area of the device is reduced, and the production efficiency is improved. And the method is particularly suitable for large-scale efficient automatic production of lithium batteries.

Description

Technical Field

[0001] This application relates to the technical field of lithium battery production, and more specifically, it relates to a semi-finished lithium battery sticker and film integrated machine. Background Technology

[0002] With the rapid development of new energy vehicles, energy storage systems, and portable electronic devices, the demand for lithium-ion batteries, as a core power source, is increasing daily, and the requirements for production efficiency and quality consistency are becoming increasingly stringent. In the later stages of lithium battery manufacturing, adding external insulation protection to the lithium batteries is a crucial step. Its main purpose is to prevent short circuits, scratches, or environmental contamination during transportation, assembly, and use.

[0003] Currently, the typical process for external insulation treatment of lithium batteries in the industry usually includes two separate steps:

[0004] 1. End face stickers: Apply insulating tape to the two tab ends (i.e., the ends where the positive and negative electrodes are located) of the lithium battery to isolate the tabs from contact with external metal parts and prevent short circuits.

[0005] 2. Peripheral heat shrink sleeve: An insulating film (such as PVC or PET heat shrink film) is heat-shrinked onto the cylindrical or square peripheral surface of the lithium battery to provide comprehensive insulation protection, mechanical protection, and appearance identification.

[0006] In existing production technologies, the above two steps are mostly completed by independent specialized machines or rely heavily on manual labor. Specifically, this presents the following problems and limitations:

[0007] 1. Dispersed processes and low production efficiency: Lithium batteries need to be transferred, loaded, and positioned between two machines, a sticker machine and a heat shrink wrapping machine, and may even need to be moved between different workstations. This discontinuous and discrete production mode results in long production cycles and low overall efficiency, which cannot meet the requirements of modern large-scale production for high cycle times and high capacity.

[0008] 2. Large equipment footprint and low integration: Two independent devices and their associated conveyor lines occupy a significant amount of cleanroom space, increasing factory costs and layout complexity. Furthermore, the connection and coordinated control between the devices are quite difficult.

[0009] 3. Multiple positioning changes affect product yield: After the end face sticker is applied, the lithium battery needs to be gripped, repositioned, and fed into the heat shrink sleeve machine for heat shrinking. Multiple gripping and repositioning changes can easily cause the already applied end face sticker to shift, lift, wrinkle, or become contaminated. Furthermore, changes in the positioning reference may cause the heat shrink sleeve to become skewed, severely impacting the final product yield.

[0010] Therefore, there is an urgent need in this field for an integrated automated equipment that can efficiently integrate the two key processes of lithium battery end face sticker and peripheral wall heat shrink sleeve film, in order to solve a series of problems existing in the above-mentioned prior art, such as low production efficiency, large equipment footprint, limited product yield, and excessive reliance on manual labor. Summary of the Invention

[0011] To address the issues of low efficiency, high equipment space occupation, and yield reduction caused by the use of separate specialized machines or heavy reliance on manual labor in existing production technologies for applying stickers and sleeves to the end face of lithium batteries, this application provides an integrated machine for applying stickers and sleeves to semi-finished lithium batteries.

[0012] A semi-finished lithium battery sticker and film-coating integrated machine includes a chassis. The chassis is equipped with a linear conveyor for conveying lithium batteries, a sticker-applying device for applying stickers to the end face of the lithium batteries, a film-coating device for fitting the film into the lithium batteries, and a hot air shrinking device for heating the film and pressing it tightly against the peripheral wall surface of the lithium batteries. The sticker-applying device, the film-coating device, and the hot air shrinking device are arranged sequentially along the conveying direction of the linear conveyor. There are two sticker-applying devices, which are staggered along the conveying direction of the linear conveyor.

[0013] It also includes a control system, and the linear conveying device, sticker-applying device, film-coating device and hot air shrinking device are all electrically connected to the control system.

[0014] Preferably, the linear conveying device includes a support base, a transfer frame, and a transfer drive mechanism. The top surface of the support base is provided with a downward-facing clamping groove that extends along the length of the support base. The top surface of the support base is provided with a plurality of first limiting grooves for limiting the lithium battery. The plurality of first limiting grooves are evenly arranged along the extension direction of the clamping groove. The transfer frame is disposed in the clamping groove. The reciprocating drive mechanism is connected to the transfer frame and is used to drive the transfer frame to move and continuously transfer the lithium battery in the first limiting groove to the adjacent first limiting groove.

[0015] Preferably, the transfer frame includes a push rod extending along the length direction of the clamping groove and a connecting plate disposed at the middle position of the bottom of the push rod. The top of the push rod is recessed with a plurality of second limiting grooves evenly arranged along its length direction, and each second limiting groove has a first limiting groove aligned with it. The distance between two adjacent first limiting grooves is equal to the distance between two adjacent second limiting grooves. The transfer driving mechanism is connected to the connecting plate to drive the connecting plate to perform lateral reciprocating movement along the length direction of the clamping groove and vertical reciprocating movement along the length direction perpendicular to the clamping groove.

[0016] Preferably, the transfer drive mechanism includes a first mounting plate, a second mounting plate, a horizontal drive cylinder, and a vertical drive cylinder. The first mounting plate is provided with a horizontal slide rail extending along the length direction of the clamping groove, and a horizontal slider is slidably disposed on the horizontal slide rail. The second mounting plate is connected and fixedly connected to the horizontal slider. The second mounting plate is provided with a vertical slide rail perpendicular to the length direction of the clamping groove, and a vertical slider is slidably disposed on the vertical slide rail. The connecting plate is connected and fixedly connected to the vertical slider. The horizontal drive cylinder is connected to the second mounting plate to drive the second mounting plate to reciprocate along the length direction of the horizontal slide rail. The vertical drive cylinder is connected to the connecting plate to drive the connecting plate to reciprocate along the length direction of the vertical slide rail.

[0017] Preferably, each of the sticker-feeding devices includes a sticker-feeding mechanism, a punching seat, a punch, a punching drive cylinder, and a pusher drive cylinder. The punching seat is located on one side of the support base. The punching seat has a punch groove that aligns with the first limiting groove. The punch is slidably disposed within the punch groove. The punching seat also has a through-slot that extends through the cross-sectional direction of the punch groove. The sticker-feeding mechanism is used to feed the sticker tape through the through-slot and tension the sticker tape. The pusher drive cylinder is located on the side of the support base away from the punching seat. A push block is provided on the drive shaft of the push core driving cylinder. The push block is aligned with the punch. The push core driving cylinder drives the push block to push the lithium battery in the limiting groove into the punch groove. The punching driving cylinder is connected to the punch. The punching driving cylinder drives the punch to slide in the punch groove, so that the punch cuts the sticker tape and presses the punched sticker onto the end face of the lithium battery while pushing the lithium battery out of the punch groove. The punching seats of the two sticker devices are respectively located on opposite sides of the support base.

[0018] Preferably, the sticker conveying mechanism includes a connecting frame, a combined roll unwinding roller, a protective tape take-up roller, a sticker tape take-up roller, a pressing assembly, a first servo motor, and a second servo motor. The punching seat is fixed to the connecting frame. The combined roll unwinding roller and the sticker tape take-up roller are both rotatably mounted on the connecting frame and are respectively located on opposite sides of the end of the punching seat away from the support base. The protective tape take-up roller is rotatably mounted on the connecting frame and is located on the side of the combined roll unwinding roller away from the sticker tape take-up roller. The first servo motor is connected to the protective tape take-up wheel to drive the protective tape hand-wound wheel to rotate. The second servo motor is connected to the sticker tape take-up wheel to drive the sticker tape take-up wheel to rotate. The combined roll unwinding wheel is used to unwind the combined roll of protective tape and sticker tape bonded together. The protective tape unwinding wheel is connected to the protective tape take-up wheel. The sticker tape unwinding wheel passes through the slot of the punching seat and is connected to the sticker tape take-up wheel. The clamping assembly is located between the punching seat and the combined roll unwinding wheel to clamp the sticker tape.

[0019] Preferably, the pressing assembly includes a powered roller, a non-powered pressure roller, a third servo motor, and a pressure roller drive cylinder. The powered roller is rotatably mounted on the connecting frame. The pressure roller drive cylinder is located on one side of the powered roller, and a wheel frame is mounted on its drive shaft. The non-powered pressure roller is rotatably mounted on the wheel frame. The pressure roller drive cylinder drives the non-powered pressure roller to move closer to or away from the powered roller. The third servo motor is connected to the powered roller to drive its rotation.

[0020] Preferably, the film-shrinking device includes a fixed frame, a film-shrinking unwinding roller, a film-shrinking rod, an upper traction roller, a lower traction roller, a core-abutting drive cylinder, a cutter drive cylinder, and a traction roller drive assembly. The fixed frame is located on one side of the support base. The upper and lower traction rollers are rotatably mounted on the fixed frame and arranged vertically parallel and symmetrically. The film-shrinking rod is located between the upper and lower traction rollers and aligned with the first limiting groove. The fixed frame is provided with support rods at both ends of the film-shrinking rod. The support rods are rotatably mounted with a left limiting wheel and a right limiting wheel on opposite sides of the film-shrinking rod, respectively. The film-shrinking unwinding roller is rotatably mounted on the fixed frame for unwinding the heat-shrinking film sleeve, and the heat-shrinking film sleeve is sleeved onto the film-shrinking rod from the side away from the support base. The core-abutting drive cylinder is provided with... On the side of the support base away from the fixed frame, a pressing block is provided on the drive shaft of the core-abutting drive cylinder. The pressing block is aligned with the sleeve rod and cooperates with the sleeve rod to clamp the lithium battery. The upper traction roller and the lower traction roller are both connected to the traction roller drive assembly. The traction roller drive assembly drives the upper traction roller and the lower traction roller to rotate synchronously and in opposite directions, causing the sleeve rod and the heat-shrinkable sleeve to move closer to or away from the first limiting groove, and causing the heat-shrinkable sleeve to move along the length direction of the sleeve rod. The cutter drive cylinder is fixed on the fixed frame and located between the support base and the sleeve rod. A cutter holder is provided on the drive shaft of the cutter drive cylinder, and a cutter is provided on the cutter holder. The cutter drive cylinder drives the cutter to reciprocate in a direction perpendicular to the length direction of the sleeve rod.

[0021] Preferably, the film-shrinking device further includes a mouth-supporting assembly, which includes a mouth-supporting plate, a mouth-supporting driving cylinder, and a follow-moving driving cylinder. The drive shaft of the mouth-supporting driving cylinder is provided with a first mounting member. The mouth-supporting plate is disposed on the first mounting member and extends to one end of the film-shrinking rod. The mouth-supporting driving cylinder drives the mouth-supporting plate to lift the end of the heat-shrinkable film sleeve to widen the opening. The follow-moving driving cylinder is fixed on the fixing frame, and its drive shaft is provided with a second mounting member. The mouth-supporting driving cylinder is fixedly mounted on the second mounting member. The follow-moving driving cylinder drives the mouth-supporting driving cylinder to move along the movement direction of the heat-shrinkable film sleeve.

[0022] Preferably, the hot air shrinking device includes a hot air blower and a hot air shrinking drive cylinder. The outlet of the hot air blower is aligned with the first limiting groove and is placed at an angle. The drive shaft of the hot air shrinking drive cylinder is provided with a third mounting component. The hot air blower is mounted and fixed on the third mounting component. The hot air blower is driven by the hot air shrinking cylinder to move along the direction perpendicular to the length extension of the clamping groove.

[0023] In summary, this application includes at least one of the following beneficial technical effects:

[0024] 1. By integrating three key processes—lithium battery end-face labeling, peripheral wall film application, and hot air tightening of the film—into a single machine and using a linear conveyor for continuous transport, a high degree of integration and automation of the production process is achieved. All insulation treatment processes are completed after a single clamping and positioning of the lithium battery, eliminating the cumbersome transfers, loading / unloading, and repetitive positioning time between processes. This significantly shortens the production cycle time for a single lithium battery, effectively meeting the requirements of modern large-scale production for high efficiency and high-speed cycles. Simultaneously, integrating functions that previously required two or more independent machines into a single chassis greatly reduces the overall footprint of the equipment.

[0025] 2. The transfer drive mechanism, through the precise cooperation of the horizontal and vertical cylinders, realizes the smooth and accurate step-by-step transfer of lithium batteries, which not only ensures the conveying efficiency, but also avoids damage to the lithium batteries and attached components. The limiting groove is used to limit the lithium batteries to achieve accurate positioning.

[0026] 3. The sticker applicator integrates punching and applying, with precise and efficient operation. The sticker conveying mechanism is precisely controlled by a servo motor, and together with the clamping components, it ensures stable tension and conveying of the sticker tape, resulting in high punching quality and accurate application positioning.

[0027] 4. The film sleeve device achieves automatic feeding, precise sleeve insertion, and automatic cutting of the film sleeve through the traction roller driving the film material, the automatic expansion of the opening component, the fixed-length cutting of the cutter, and the coordinated action of the core-supporting cylinder. It has a high degree of automation and a high success rate of film sleeve application. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the overall structure of a semi-finished lithium battery sticker and film integrated machine according to this embodiment.

[0029] Figure 2 This is a schematic diagram of the linear conveying device in this embodiment.

[0030] Figure 3 This is a schematic diagram of the sticker device in this embodiment.

[0031] Figure 4 This is a schematic diagram of the clamping assembly in this embodiment.

[0032] Figure 5 This is a schematic diagram of the structure of the film-coating device in this embodiment.

[0033] Figure 6 This is a schematic diagram of the connection structure of the upper traction roller, lower traction roller, and traction roller drive assembly in this embodiment.

[0034] Figure 7 This is a schematic diagram of the hot air shrinkage device in this embodiment.

[0035] Figure 8 This is a schematic diagram of the insulation detection device in this embodiment.

[0036] Reference numerals: 1. Chassis; 2. Linear conveyor; 21. Support base; 211. Grip groove; 212. First limiting groove; 22. Transfer frame; 221. Push rod; 2211. Second limiting groove; 222. Connecting plate; 23. Transfer drive mechanism; 231. First mounting plate; 2311. Horizontal slide rail; 2312. Horizontal slider; 232. Second mounting plate; 2321. Vertical slide rail; 2322. Vertical slider; 233. Horizontal drive cylinder; 234. Vertical drive cylinder; 3. Sticker device; 31. Sticker conveying mechanism; 311, connecting frame; 312, connecting roll unwinding roller; 313, protective tape take-up roller; 314, sticker tape take-up roller; 315, pressing assembly; 3151, powered roller; 3152, unpowered pressure roller; 3153, third servo motor; 3154, pressure roller drive cylinder; 3155, wheel frame; 316, first servo motor; 317, second servo motor; 318, horizontal support roller; 32, punching seat; 321, grooving; 322, slotting; 33, punch; 34, punching drive cylinder; 35. Pusher cylinder; 351. Push block; 4. Film covering device; 41. Fixing frame; 411. Support rod; 412. Left limit wheel; 413. Right limit wheel; 42. Film unwinding wheel; 43. Film covering rod; 431. Roller; 44. Upper traction roller; 45. Lower traction roller; 46. Pusher cylinder; 461. Pressing block; 47. Cutter drive cylinder; 471. Cutter holder; 472. Cutter; 48. Traction roller drive assembly; 481. Fourth servo motor; 482. Fifth servo motor; 483. First driven gear ; 484, First driving gear; 485, Second driven gear; 486, Second driving gear; 49, Support assembly; 491, Support plate; 492, Support drive cylinder; 4921, First mounting component; 493, Follow-up drive cylinder; 4931, Second mounting component; 5, Hot air shrinkage device; 51, Hot air blower; 52, Hot air shrinkage drive cylinder; 521, Third mounting component; 6, Control system; 7, Insulation detection device; 71, Detection drive cylinder; 72, Detection block; 73, Conductive probe; 8, Belt conveyor; Detailed Implementation

[0037] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0038] Reference Figure 1 A semi-finished lithium battery sticker and sleeve integrated machine includes a chassis 1, on which a linear conveyor 2, a sticker applicator 3, a sleeve device 4, a hot air shrinking device 5, and a control system 6 are installed. The linear conveyor 2 continuously conveys lithium batteries; the sticker applicator 3 affixes insulating stickers to the end faces of the lithium batteries; the sleeve device 4 automatically sleeves the heat-shrink film onto the periphery of the lithium battery; and the hot air shrinking device 5 shrinks the film and presses it tightly against the surface of the lithium battery using hot air. All these devices are arranged sequentially along the conveying direction of the linear conveyor 2, achieving process integration. Two sticker applicators 3 are staggered along the conveying direction, each used for applying stickers to the two tab ends of the lithium battery, ensuring that the insulation treatment is completed simultaneously at both ends of the lithium battery. The control system 6 is electrically connected to the linear conveyor 2, the sticker applicator 3, the sleeve device 4, and the hot air shrinking device 5, coordinating the action sequence and timing of each part to achieve automated production.

[0039] Reference Figure 1 and Figure 2The linear conveying device 2 includes a support base 21, a transfer frame 22, and a transfer drive mechanism 23. The support base 21 is connected to the chassis 1. A clamping groove 211 extending along the length of the support base 21 is formed on its top surface. Multiple first limiting grooves 212 are arranged on the top surfaces of both sides of the clamping groove 211. These grooves are evenly distributed and used for temporary positioning and supporting lithium batteries. The transfer frame 22 is installed in the clamping groove 211 and is driven by the transfer drive mechanism 23 to perform horizontal and vertical reciprocating movements. The transfer frame 22 includes a push rod 221 and a connecting plate 222. Multiple second limiting grooves 2211 are provided on the top of the push rod 221. Each second limiting groove 2211 aligns with a first limiting groove 212, and the distance between adjacent first limiting grooves 212 is equal to the distance between adjacent second limiting grooves 2211. The transfer drive mechanism 23 includes a first mounting plate 231, a second mounting plate 232, a horizontal drive cylinder 233, and a vertical drive cylinder 234. The first mounting plate 231 is provided with a horizontal slide rail 2311, and a horizontal slider 2312 is slidably connected to the horizontal slide rail 2311. The second mounting plate 232 is slidably connected to the horizontal slide rail 2311 via the horizontal slider 2312. A horizontal drive cylinder 233 drives the second mounting plate 232 to move horizontally. The second mounting plate 232 is provided with a vertical slide rail 2321, and a vertical slider 2322 is slidably connected to the vertical slide rail 2321. A connecting plate 222 is slidably connected to the vertical slide rail 2321 via the vertical slider 2322. A vertical drive cylinder 234 drives the connecting plate 222 to move vertically. During operation, the transfer frame 22 first rises, causing the second limiting groove 2211 to lift the lithium battery. Then it moves horizontally one station and then descends to place the lithium battery into the adjacent first limiting groove 212. This cycle is repeated to achieve a step-by-step transfer of the lithium battery. This design ensures that the lithium battery is positioned accurately and stably during transportation, avoiding sticker displacement or damage caused by repeated clamping. Furthermore, a belt conveyor 8 is provided at one end of the chassis 1 and the support base 21 to automatically unload the processed lithium battery.

[0040] Reference Figure 3The sticker-feeding device 3 includes a sticker-feeding mechanism 31, a punching seat 32, a punch 33, a punching drive cylinder 34, and a pusher drive cylinder 35. The punching seat 32 is located on one side of the support base 21 and has a punching groove 321 aligned with the first limiting groove 212 and a through groove 322 penetrating the cross-section of the punching groove 321. The sticker-feeding mechanism 31 feeds the sticker tape through the through groove 322 and maintains it under tension. The pusher drive cylinder 35 is located on the other side of the support base 21, and its drive shaft is equipped with a push block 351. The push block 351 is aligned with the punch 33 and can push the lithium battery into the punching groove 321. The punching drive cylinder 34 drives the punch 33 to slide within the punching groove 321. The punch 33 first punches the sticker tape to form a sticker sheet, then presses the sticker onto the end face of the lithium battery, simultaneously pushing the lithium battery out of the punching groove 321. The punching seats 32 of the two sticker devices 3 are located on opposite sides of the support base 21 to process the two end faces of the lithium battery.

[0041] Reference Figure 3 and Figure 4The sticker conveying mechanism 31 includes a connecting frame 311, a bonding roll unwinding roller 312, a protective tape take-up roller 313, a sticker tape take-up roller 314, a pressing assembly 315, a first servo motor 316, a second servo motor 317, and two horizontal support rollers 318. The connecting frame 311 is connected to the housing 1. The bonding roll unwinding roller 312 and the sticker tape take-up roller 314 are rotatably mounted on the connecting frame 311 and are located on opposite sides of the end of the punching seat 32 away from the support base 21. The protective tape take-up roller 313 is located outside the bonding roll unwinding roller 312. The first servo motor 316 is fixed to the connecting frame 311 and connected to the protective tape take-up roller 313 to drive the protective tape take-up roller 313 to rotate. The second servo motor 317 is fixed to the connecting frame 311 and connected to the sticker tape take-up roller 314 to drive the sticker tape take-up roller 314 to rotate. The unwinding roller 312 unwinds a roll of material consisting of protective tape and sticker tape bonded together. The protective tape is guided to the protective tape take-up roller 313, while the sticker tape passes through the slot 322 of the punching seat 32 and is guided to the sticker tape take-up roller 314. The clamping assembly 315 is located between the punching seat 32 and the unwinding roller 312, and includes a powered roller 3151, a non-powered pressure roller 3152, a third servo motor 3153, and a pressure roller drive cylinder 3154. The power roller 3151 is rotatably mounted on the connecting frame 311 and driven to rotate by the third servo motor 3153, which is fixed to the connecting frame 311. The pressure roller drive cylinder 3154 is connected and fixed to the connecting frame 311. The pressure roller drive cylinder 3154 is equipped with a wheel frame 3155. The unpowered pressure roller 3152 is rotatably mounted on the wheel frame 3155. The pressure roller drive cylinder 3154 drives the unpowered pressure roller 3152 to move closer to or away from the power roller 3151 to press or loosen the sticker tape, ensuring smooth conveying. Two horizontal support rollers 318 are respectively located on opposite sides of the support base 21 and aligned with the opening of the through slot 322. They support the sticker tape to keep it horizontal at the through slot 322, preventing the sticker tape from sagging or shifting, thereby improving the punching accuracy and sticker quality.

[0042] Reference Figure 1 , Figure 5 and Figure 6The film-shrinking device 4 includes a fixed frame 41, a film-shrinking unwinding roller 42, a film-shrinking rod 43, an upper traction roller 44, a lower traction roller 45, a core-supporting drive cylinder 46, a cutter drive cylinder 47, a traction roller drive assembly 48, and a support assembly 49. The fixed frame 41 is located on one side of the support base 21. There are two upper traction rollers 44 and two lower traction rollers 45, each rotatably mounted on the fixed frame 41, arranged symmetrically in parallel. The film-shrinking rod 43 is located between the upper and lower traction rollers 45 and aligned with the first limiting groove 212. The fixed frame 41 has support rods 411 at both ends of the film-shrinking rod 43. Each support rod 411 is rotatably mounted with a left limiting wheel 412 and a right limiting wheel 413 for guiding and limiting the heat-shrinkable film sleeve. The film-shrinking unwinding roller 42 is used to unwind the heat-shrinkable film sleeve, which is inserted from the end of the film-shrinking rod 43 away from the support base 21. The core-supporting cylinder 46 is located on the other side of the support base 21. Its drive shaft is equipped with a pressing block 461, which aligns with the diaphragm rod 43 to clamp the lithium battery. The traction roller drive assembly 48 includes a fourth servo motor 481 and a fifth servo motor 482. Both ends of the two upper traction rollers 44 are equipped with first driven gears 483. The drive shaft of the fourth servo motor 481 is equipped with a first driving gear 484, which meshes with all the first driven gears 483, driving the two upper traction rollers 44 to rotate synchronously. Both ends of the two lower traction rollers 45 are equipped with second driven gears 485. The drive shaft of the fifth servo motor 482 is equipped with a second driving gear 486, which meshes with all the second driven gears 485, driving the two lower traction rollers 45 to rotate synchronously in opposite directions. The rotation of the upper and lower traction rollers 45 drives the film sleeve rod 43 and the heat shrink film sleeve to move along the length direction, so that the film sleeve moves closer to or away from the lithium battery. Furthermore, rollers 431 are provided on both the upper and lower sides of the film sleeve rod to make the heat shrink film sleeve move more smoothly on the film sleeve rod. The cutter drive cylinder 47 is fixed on the fixed frame 41 and is located between the support base 21 and the film sleeve rod 43. A cutter holder 471 is provided on its drive shaft. The cutter holder 471 is equipped with a cutter 472, which can move vertically reciprocating to cut the film sleeve.

[0043] Reference Figure 5 The flaring assembly 49 includes a flaring plate 491, a flaring drive cylinder 492, and a follow-up drive cylinder 493. A first mounting member 4921 is mounted on the drive shaft of the flaring drive cylinder 492, on which the flaring plate 491 is fixed and extends to one end of the membrane sleeve rod 43, allowing the membrane sleeve port to be lifted for flaring. The follow-up drive cylinder 493 is fixed on the mounting bracket 41, and a second mounting member 4931 on its drive shaft mounts the flaring drive cylinder 492, enabling the flaring assembly 49 to move synchronously with the membrane sleeve's movement direction, ensuring a stable flaring process.

[0044] Reference Figure 7The hot air shrinking device 5 includes a hot air blower 51 and a hot air shrinking drive cylinder 52. The outlet of the hot air blower 51 is aligned with the first limiting groove 212 and is placed at an angle to uniformly heat the peripheral wall of the lithium battery. A third mounting part 521 is mounted on the drive shaft of the hot air shrinking drive cylinder 52, on which the hot air blower 51 is fixed. The cylinder drives the hot air blower 51 to move perpendicular to the conveying direction, adjusting the heating position to ensure uniform shrinkage of the film sleeve.

[0045] Reference Figure 8 In addition, the equipment includes an insulation detection device 7, located between the film covering device 4 and the hot air shrinking device 5. The insulation detection device 7 includes two detection drive cylinders 71, located on opposite sides of the support base 21 and fixedly connected to it. Each detection drive cylinder 71 has a detection block 72 mounted on its drive shaft. The detection block 72 has conductive probes 73, with the two probes aligned with the same first limiting groove 212. The two detection drive cylinders 71 are driven synchronously, causing the probes to move closer to or further away from the lithium battery end face. The probes are connected to an alarm via wires. When the lithium battery end face is detected as not being covered with adhesive or being poorly covered, the circuit is activated, triggering an alarm to achieve insulation quality detection.

[0046] The entire equipment workflow is as follows: Lithium batteries are conveyed by a linear conveyor 2 in a step-by-step manner. When passing through the first sticker-applying device 3, one end face is stickered; then, passing through the second sticker-applying device 3, the other end face is stickered; then, entering the sleeve-applying device 4, the sleeve is automatically fitted onto the periphery of the lithium battery; next, the integrity of the sticker is checked by the insulation detection device 7; finally, in the hot air shrinking device 5, the sleeve is heated and shrinks tightly against the surface of the lithium battery. All processes are completed in a single positioning, improving production efficiency, reducing equipment footprint, and avoiding yield problems caused by multiple positioning steps.

[0047] Although embodiments of this application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A semi-finished lithium battery sticker and film integrated machine, characterized in that: The device includes a chassis, on which are mounted a linear conveyor for conveying lithium batteries, a sticker applicator for applying stickers to the end face of the lithium batteries, a film sleeve applicator for fitting a film sleeve into the lithium batteries, and a hot air shrinking device for heating the film sleeve and pressing it tightly against the peripheral wall surface of the lithium batteries. The sticker applicator, film sleeve applicator, and hot air shrinking device are arranged sequentially along the conveying direction of the linear conveyor, and there are two sticker applicators, which are staggered along the conveying direction of the linear conveyor. It also includes a control system, and the linear conveying device, sticker-applying device, film-coating device and hot air shrinking device are all electrically connected to the control system.

2. The semi-finished lithium battery sticker and film integrated machine according to claim 1, characterized in that: The linear conveying device includes a support base, a transfer frame, and a transfer drive mechanism. The top surface of the support base is provided with a downward-facing clamping groove that extends along the length of the support base. The top surface of the support base is provided with a plurality of first limiting grooves for limiting lithium batteries. The plurality of first limiting grooves are evenly arranged along the extension direction of the clamping groove. The transfer frame is disposed in the clamping groove. The reciprocating drive mechanism is connected to the transfer frame and is used to drive the transfer frame to move and continuously transfer the lithium batteries in the first limiting grooves forward to adjacent first limiting grooves.

3. The semi-finished lithium battery sticker and film integrated machine according to claim 2, characterized in that: The transfer frame includes a push rod extending along the length of the clamping groove and a connecting plate disposed at the middle position of the bottom of the push rod. The top of the push rod is recessed with a plurality of second limiting grooves evenly arranged along its length, and each second limiting groove has a first limiting groove aligned with it. The distance between two adjacent first limiting grooves is equal to the distance between two adjacent second limiting grooves. The transfer drive mechanism is connected to the connecting plate to drive the connecting plate to move laterally reciprocating along the length of the clamping groove and to move vertically reciprocating along the length perpendicular to the clamping groove.

4. The semi-finished lithium battery sticker and film integrated machine according to claim 3, characterized in that: The transfer drive mechanism includes a first mounting plate, a second mounting plate, a horizontal drive cylinder, and a vertical drive cylinder. The first mounting plate is provided with a horizontal slide rail extending along the length direction of the clamping groove, and a horizontal slider is slidably disposed on the horizontal slide rail. The second mounting plate is connected and fixed to the horizontal slider. The second mounting plate is provided with a vertical slide rail perpendicular to the length direction of the clamping groove, and a vertical slider is slidably disposed on the vertical slide rail. A connecting plate is connected and fixed to the vertical slider. The horizontal drive cylinder is connected to the second mounting plate to drive the second mounting plate to reciprocate along the length direction of the horizontal slide rail. The vertical drive cylinder is connected to the connecting plate to drive the connecting plate to reciprocate along the length direction of the vertical slide rail.

5. The semi-finished lithium battery sticker and film integrated machine according to claim 2, characterized in that: Each of the aforementioned sticker-feeding devices includes a sticker-feeding mechanism, a punching seat, a punch, a punching drive cylinder, and a pusher drive cylinder. The punching seat is located on one side of the support base. The punching seat has a punch groove that aligns with the first limiting groove. The punch is slidably disposed within the punch groove. The punching seat also has a through-slot extending through the cross-section of the punch groove. The sticker-feeding mechanism is used to feed the sticker tape through the through-slot and tension the sticker tape. The pusher drive cylinder is located on the side of the support base away from the punching seat. A push block is provided on the drive shaft of the push cylinder. The push block is aligned with the punch. The push cylinder drives the push block to push the lithium battery in the limiting groove into the punch groove. The punching drive cylinder is connected to the punch. The punching drive cylinder drives the punch to slide in the punch groove, so that the punch cuts the sticker tape and presses the cut sticker onto the end face of the lithium battery while pushing the lithium battery out of the punch groove. The two sticker devices are respectively located on opposite sides of the support base.

6. The semi-finished lithium battery sticker and film integrated machine according to claim 5, characterized in that: The sticker conveying mechanism includes a connecting frame, a combined roll unwinding roller, a protective tape take-up roller, a sticker tape take-up roller, a pressing assembly, a first servo motor, and a second servo motor. The punching seat is fixed to the connecting frame. The combined roll unwinding roller and the sticker tape take-up roller are both rotatably mounted on the connecting frame and are located on opposite sides of the end of the punching seat away from the support base. The protective tape take-up roller is rotatably mounted on the connecting frame and is located on the side of the combined roll unwinding roller away from the sticker tape take-up roller. The first servo motor... A servo motor is connected to the protective tape take-up wheel to drive the protective tape take-up wheel to rotate. A second servo motor is connected to the sticker tape take-up wheel to drive the sticker tape take-up wheel to rotate. The combined roll unwinding wheel is used to unwind the combined roll of protective tape and sticker tape bonded together. The protective tape unwinding wheel is connected to the protective tape take-up wheel. The sticker tape unwinding wheel passes through the slot of the punching seat and is connected to the sticker tape take-up wheel. The clamping assembly is located between the punching seat and the combined roll unwinding wheel to clamp the sticker tape.

7. The semi-finished lithium battery sticker and film integrated machine according to claim 6, characterized in that: The clamping assembly includes a powered rotating wheel, a non-powered pressure wheel, a third servo motor, and a pressure wheel drive cylinder. The powered rotating wheel is rotatably mounted on the connecting frame. The pressure wheel drive cylinder is located on one side of the powered rotating wheel, and a wheel frame is mounted on its drive shaft. The non-powered pressure wheel is rotatably mounted on the wheel frame. The pressure wheel drive cylinder drives the non-powered pressure wheel to move closer to or away from the powered rotating wheel. The third servo motor is connected to the powered rotating wheel to drive its rotation.

8. The semi-finished lithium battery sticker and film integrated machine according to claim 2, characterized in that: The film-shrinking device includes a fixed frame, a film-shrinking unwinding roller, a film-shrinking rod, an upper traction roller, a lower traction roller, a core-abutting drive cylinder, a cutter drive cylinder, and a traction roller drive assembly. The fixed frame is located on one side of the support base. The upper and lower traction rollers are rotatably mounted on the fixed frame and arranged vertically parallel and symmetrically. The film-shrinking rod is located between the upper and lower traction rollers and aligned with the first limiting groove. The fixed frame has support rods at both ends of the film-shrinking rod. The support rods have left and right limiting wheels rotatably mounted on opposite sides of the film-shrinking rod. The film-shrinking unwinding roller is rotatably mounted on the fixed frame for unwinding the heat-shrinking film sleeve, and the heat-shrinking film sleeve is fitted onto the film-shrinking rod from the side away from the support base. The core-abutting drive cylinder is located on the fixed frame. On the side of the support base away from the fixed frame, a pressing block is provided on the drive shaft of the core-abutting drive cylinder. The pressing block is aligned with the sleeve rod and cooperates with the sleeve rod to clamp the lithium battery. The upper traction roller and the lower traction roller are both connected to the traction roller drive assembly. The traction roller drive assembly drives the upper traction roller and the lower traction roller to rotate synchronously and in opposite directions, causing the sleeve rod and the heat-shrinkable sleeve to move closer to or away from the first limiting groove, and causing the heat-shrinkable sleeve to move along the length direction of the sleeve rod. The cutter drive cylinder is fixed on the fixed frame and located between the support base and the sleeve rod. A cutter holder is provided on the drive shaft of the cutter drive cylinder, and a cutter is provided on the cutter holder. The cutter drive cylinder drives the cutter to reciprocate in a direction perpendicular to the length direction of the sleeve rod.

9. A semi-finished lithium battery sticker and film integrated machine according to claim 8, characterized in that: The film-shrinking device further includes a mouth-supporting assembly, which includes a mouth-supporting plate, a mouth-supporting driving cylinder, and a follow-moving driving cylinder. The drive shaft of the mouth-supporting driving cylinder is provided with a first mounting member. The mouth-supporting plate is disposed on the first mounting member and extends to one end of the film-shrinking rod. The mouth-supporting driving cylinder drives the mouth-supporting plate to lift the end of the heat-shrinkable film sleeve to widen the opening. The follow-moving driving cylinder is fixed on the fixed frame, and its drive shaft is provided with a second mounting member. The mouth-supporting driving cylinder is fixedly mounted on the second mounting member. The follow-moving driving cylinder drives the mouth-supporting driving cylinder to move along the movement direction of the heat-shrinkable film sleeve.

10. A semi-finished lithium battery sticker and film integrated machine according to claim 2, characterized in that: The hot air shrinking device includes a hot air blower and a hot air shrinking drive cylinder. The outlet of the hot air blower is aligned with the first limiting groove and is placed at an angle. The drive shaft of the hot air shrinking drive cylinder is provided with a third mounting component. The hot air blower is mounted and fixed on the third mounting component. The hot air blower is driven by the hot air shrinking cylinder to move along the direction perpendicular to the length extension of the clamping groove.

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