Battery shell sheet automatic rubberizing equipment and rubberizing method

Abstract

The application discloses a kind of battery shell piece automatic rubber sticking equipment and its rubber sticking method, belong to battery manufacturing technical field.The equipment includes rack and install tray feeding and discharging mechanism on rack, feeding manipulator, transfer mechanism, carousel mechanism, visual positioning and foolproof device, pressing device, rubber sticking mechanism, laser cutting rubber mechanism, hot-pressing device, AOI detection mechanism and discharging mechanism.Transfer mechanism transports shell piece from horizontal state to the lower of vertically arranged carousel and is lifted upward, so that shell piece side is adsorbed by carousel, and posture conversion is completed;Carousel rotates counterclockwise and sequentially transports shell piece to visual positioning, rubber sticking rolling, laser cutting and other stations;Hot-pressing device heats and keeps pressure to shell piece after rubber sticking;AOI detection mechanism detects appearance of rubber paper;Discharging mechanism automatically sorts good product and defective product according to detection result.The application realizes the full-process automation integration of battery shell piece rubber sticking, with the advantages of high rubber sticking precision, high production efficiency, stable product quality and the like.

Description

Technical Field

[0001] This application relates to the field of battery processing equipment, and in particular to an automatic adhesive application device and method for battery casings. Background Technology

[0002] Battery casings (such as steel or aluminum sheets) are key structural components for battery encapsulation, and applying insulating or protective tape to their surfaces is an important step in battery manufacturing. The quality of this tape application directly affects the battery's insulation performance, safety, and lifespan.

[0003] Currently, the following technical problems exist in the adhesive application process for battery casings:

[0004] Firstly, existing adhesive application equipment is mostly semi-automatic or stand-alone operation with decentralized processes. Processes such as feeding, adhesive application, cutting, hot pressing, and inspection are typically completed by multiple independent machines, with manual transfers or simple conveyor mechanisms connecting each process. This decentralized production model not only results in large equipment footprints and frequent manual intervention but also severely restricts production efficiency and product yield stability. Especially during the transition from horizontal feeding to vertical adhesive application of the shell, traditional equipment often requires complex flipping mechanisms or multi-station transfers, leading to cumbersome structures and difficulty in guaranteeing handover accuracy.

[0005] Secondly, the accuracy and consistency of adhesive application are difficult to control effectively. Due to the small size, diverse shapes, and difficulty in standardizing positioning references of battery casings, traditional adhesive application methods often result in defects such as tape misalignment, air bubbles, and wrinkles due to inaccurate positioning. Furthermore, tape cutting typically employs mechanical die-cutting, which has limited cutting precision and is ill-suited for processing irregularly shaped tapes, further impacting the application quality. For the post-application heat-curing stage, traditional equipment lacks precise control over process parameters such as pressure and temperature, leading to unstable bonding strength between the adhesive tape and the casing, ultimately resulting in significant fluctuations in product yield. Summary of the Invention

[0006] The purpose of this invention is to provide an automated adhesive application equipment and method for battery casings that can achieve fully automated integrated production of the battery casing adhesive application process, while ensuring high-precision adhesive application and improving production efficiency and yield.

[0007] To achieve the above objectives, this application provides the following technical solution:

[0008] An automatic battery casing adhesive application device includes a frame and the following mechanisms mounted on the frame: a tray loading and unloading mechanism, including a hopper and a tray conveying device for buffering and supplying trays loaded with casings, and for recycling empty trays; a loading robot for picking up casings from the tray loading and unloading mechanism and placing them on a transfer mechanism; a transfer mechanism including at least one vacuum loading platform and a drive module for driving the vacuum loading platform to move along the Y-axis, the vacuum loading platform being used to receive casings placed by the loading robot; and a turntable mechanism including a rotatable, vertically arranged turntable with multiple picking surfaces, each with a vacuum suction hole; when the transfer mechanism moves below the turntable, the vacuum loading platform lifts upward, causing the side of the casing to be sucked up by the suction surface of the turntable, completing the transfer of the casing from a horizontal to a vertical position. The system includes: a direct handover mechanism; a visual positioning and error-proofing device, located at the first station of the turntable, for capturing images of the shell pieces adsorbed by the turntable for precise positioning and error-proofing detection of irregular shapes; a pressing device, located on the side of the turntable, for pressing the shell pieces firmly onto the turntable before applying adhesive; an adhesive application mechanism, including a tape unwinding device and a rolling device, the rolling device for rolling and applying the unwound tape to the surface of the shell pieces on the turntable; a laser cutting adhesive mechanism, located after the adhesive application mechanism, for cutting the tape applied to the shell pieces according to a preset shape; a hot pressing device, including a heatable lower pressure head and an upper pressure block, for heating and pressing the adhesive tape on the shell pieces after applying and cutting; an AOI inspection mechanism, located after the hot pressing device, for visually inspecting the hot-pressed adhesive tape; and a feeding mechanism for feeding qualified shell pieces to a tray and rejecting defective products.

[0009] Furthermore, the transfer mechanism includes two vacuum loading platforms, namely a first vacuum loading platform and a second vacuum loading platform; a positioning block device is provided on one side of the first vacuum loading platform for coarse positioning of the shell sheet.

[0010] Furthermore, the turntable is a square turntable with four material picking planes; the turntable mechanism also includes a rotary drive device for driving the turntable to rotate counterclockwise, thereby transporting the shell pieces to different processing stations in sequence.

[0011] Furthermore, the loading robot is a multi-axis robotic arm with two sets of material-grabbing suction cup assemblies at its end. The distance between the two sets of material-grabbing suction cup assemblies is adjustable, and each set of material-grabbing suction cup assemblies can be raised and lowered independently to grab two shell pieces at a time.

[0012] Furthermore, the rolling device includes a pressing transverse module, a pressing roller, and a pressing drive cylinder. The pressing transverse module drives the pressing roller to approach the tape on the shell, and the pressing drive cylinder drives the pressing roller to roll the tape onto the shell in the front-back direction.

[0013] Furthermore, the hot pressing device also includes a hot pressing cylinder, a pressure sensor, and a mounting base; the heatable lower pressure head and upper pressure block have built-in heating rods as heating sources.

[0014] Furthermore, the adhesive application mechanism also includes a waste tape winding device, a tape tensioning device, and a tape guide roller, wherein the tape guide roller is provided with a limiting groove.

[0015] Furthermore, the laser cutting mechanism includes a laser cutting head and a laser traversing module. The laser traversing module is used to drive the laser cutting head to move so as to cut a square-shaped piece of tape on the shell.

[0016] An automatic adhesive application method for battery casing includes the following steps:

[0017] S1. The loading robot grabs the shell pieces from the loading and unloading mechanism of the material tray and places the shell pieces on the vacuum loading platform of the transfer mechanism;

[0018] S2. The vacuum loading platform is moved to the bottom of the turntable by the drive module. The vacuum loading platform is lifted up so that the side of the horizontally placed shell is attracted by the vertically set turntable, thus completing the transfer of the shell from a horizontal state to a vertical state.

[0019] S3. Take pictures of the shell pieces adsorbed on the turntable using a visual positioning and error-proofing device to obtain the precise position information and irregular defect information of the shell pieces.

[0020] S4. The pressing device presses the shell sheet onto the turntable. The adhesive applicator drives the tape close to the shell sheet, and then the rolling device of the adhesive applicator rolls and applies the tape to the surface of the shell sheet.

[0021] S5. The tape attached to the shell is cut according to the preset shape by the laser tape cutting mechanism;

[0022] S6. Transfer the glued and cut shell pieces to the hot press device, and use heat and pressure to firmly bond the adhesive paper to the shell pieces;

[0023] S7. Conduct an appearance inspection of the hot-pressed adhesive tape by an AOI inspection agency;

[0024] S8. Based on the test results, the good products and defective products are fed separately through the feeding mechanism.

[0025] The beneficial effects of this application are as follows:

[0026] (1) This invention integrates multiple processes such as tray loading and unloading, shell loading, posture conversion, visual positioning, adhesive rolling, laser cutting, hot pressing and curing, AOI inspection, and good and bad product unloading into one machine. Through reasonable workstation layout and control logic, it realizes full-process automated operation. In particular, the use of a vertically set turntable as the core workstation carrier, with multiple processing workstations arranged around the turntable in a three-dimensional manner, effectively shortens the transfer path and time loss between processes. The transfer mechanism adopts the alternating operation of dual vacuum platforms, combined with the design of the loading robot grabbing two shells at a time, further improving the loading cycle. Compared with the traditional decentralized multi-equipment operation mode, this invention significantly reduces manual intervention and intermediate buffer links, realizing high efficiency and high continuity of battery shell adhesive production.

[0027] (2) This invention constructs a multi-level positioning system from coarse positioning to fine positioning. The positioning block device set in the transfer mechanism performs preliminary coarse positioning of the shell pieces, solving the problem of inconsistent incoming shell piece posture; the visual positioning and error-proofing device set in the first station of the turntable performs high-precision photographic positioning of the shell pieces adsorbed on the turntable, which can accurately obtain the actual position deviation of the shell pieces and compensate for it. At the same time, it can also detect irregularly shaped shell pieces or incoming material defects, realizing the error-proofing function. This positioning method combining coarse and fine positioning, combined with the high-precision cutting of the tape shape by the laser tape cutting mechanism, ensures the positional accuracy and shape accuracy of the tape, effectively solving the problems of tape offset and wrinkling caused by inaccurate positioning in traditional tape application methods.

[0028] (3) This invention achieves a smooth transition of the shell sheet from a horizontal feeding state to a vertical adhesive application state through the coordinated operation of the transfer mechanism and the vertical turntable. The vacuum feeding platform carries the horizontally placed shell sheet to the bottom of the turntable and then lifts it upward, so that the side of the shell sheet directly contacts the material picking plane of the turntable and is vacuum-adsorbed. The entire handover process does not require a complex flipping robot or additional posture conversion device, and the structure is simple and the operation is reliable. This side-suction handover method effectively avoids the damage to the shell sheet that may be caused by the traditional flipping mechanism, while ensuring the consistency and stability of the handover posture.

[0029] (4) This invention incorporates a hot-pressing device after adhesive application and laser cutting. Heated upper and lower pressure heads heat and press the adhesive paper, ensuring it adheres fully to the shell surface and improving adhesion strength and durability. The hot-pressing device includes a built-in pressure sensor and heating rod, enabling precise control of process parameters and ensuring consistent hot-pressing results. After hot pressing, the AOI inspection mechanism automatically detects defects such as appearance, size, edge distance, and bubbles in the adhesive paper using a vision system. Based on the inspection results, the unloading mechanism automatically distinguishes between good and defective products. This closed-loop design of hot pressing and inspection enables quality control during production and automatic rejection of defective products, effectively preventing defective products from flowing into the next process.

[0030] (5) Several key mechanisms of this invention adopt flexible design. The spacing between the two sets of suction cups of the loading robot is adjustable and they can be raised and lowered independently, which can adapt to shells of different sizes and spacings; the multiple picking planes of the turntable can realize continuous station operation; the laser adhesive cutting mechanism can realize the precise cutting of various shapes of adhesive tape through program control. The above design enables the equipment to quickly switch to produce battery shells of different specifications and models, with a high degree of flexibility, meeting the actual needs of multi-variety small-batch production. Attached Figure Description

[0031] Figure 1 This is a top view of an automatic battery casing adhesive applicator provided in an embodiment of this application;

[0032] Figure 2 This is a three-dimensional structural diagram of a tray loading and unloading mechanism provided in an embodiment of this application;

[0033] Figure 3 A three-dimensional structural diagram of a loading robot provided in an embodiment of this application;

[0034] Figure 4 A three-dimensional structural schematic diagram of a transfer mechanism provided in an embodiment of this application;

[0035] Figure 5 A three-dimensional structural schematic diagram of a turntable mechanism provided in an embodiment of this application;

[0036] Figure 6 A three-dimensional structural schematic diagram of a turntable mechanism provided in one embodiment of this application from another perspective;

[0037] Figure 7 A three-dimensional structural schematic diagram of an adhesive applicator provided in an embodiment of this application;

[0038] Figure 8 A bottom view of a rolling device provided in an embodiment of this application;

[0039] Figure 9 for Figure 7 A partial enlarged view of the pressure-sealing buffer device at point A;

[0040] Figure 10 A three-dimensional structural schematic diagram of a laser cutting mechanism provided in an embodiment of this application;

[0041] Figure 11 A side view of a hot pressing apparatus provided in an embodiment of this application;

[0042] Figure 12 A side view of a turntable provided in an embodiment of this application; Detailed Implementation

[0043] The specific embodiments of this application will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this application, but are not intended to limit the scope of this application.

[0044] like Figure 1 As shown, an automatic battery casing adhesive application device includes a frame 100 and a material tray loading / unloading mechanism 1, a loading robot 2, a transfer mechanism 3, a turntable mechanism 4, a vision positioning and error-proofing device 5, a pressing device 6, an adhesive application mechanism 7, a laser adhesive cutting mechanism 8, a hot pressing device 9, an AOI inspection mechanism 10, and an unloading mechanism 12 mounted on the frame. These mechanisms are arranged sequentially along the process path to form a fully automated adhesive application production line. This application achieves a smooth transition of the casing from a horizontal loading state to a vertical adhesive application state through the coordinated operation of the transfer mechanism 3 and the vertically arranged square turntable mechanism 4. Furthermore, it integrates multiple processes such as vision positioning, adhesive application, and laser cutting around the four material handling planes of the square turntable, thereby maximizing equipment compactness and production efficiency while ensuring high-precision adhesive application.

[0045] like Figure 2 As shown, the tray loading / unloading mechanism 1 includes a hopper 10 and a tray conveying device 11. The hopper is used to stack and store trays loaded with shell pieces and empty trays. The tray conveying device includes a tray transfer device 111 and a tray lifting device 112, used to transport full trays from the hopper to the loading station and to stack and store empty trays. Preferably, the tray loading / unloading mechanism also includes a tray photographing device 113, which is set above the gripping path of the loading robot 2, and is used to take pictures of the shell pieces in the tray before the loading robot grips the shell pieces to determine whether there is material in the tray and the incoming posture of the shell pieces.

[0046] like Figure 3 As shown, the loading robot 2 is a multi-axis robotic arm with two sets of suction cup assemblies 20 at its end. The distance between the two sets of suction cup assemblies is adjustable to accommodate the spacing of shell pieces of different sizes; each set of suction cup assemblies can be raised and lowered independently to compensate for the height difference of the shell pieces during gripping. The loading robot 2 grips two shell pieces at a time from the material tray loading / unloading mechanism 1 and places them on the vacuum loading platform of the transfer mechanism 3.

[0047] like Figure 4As shown, the transfer mechanism 3 includes a first vacuum loading platform 31, a second vacuum loading platform 32, and a drive module 33. The drive module 33 is arranged along the Y-axis and is used to drive the first vacuum loading platform 31 and the second vacuum loading platform 32 to reciprocate along the Y-axis. The first vacuum loading platform 31 is used to receive the shell pieces placed by the loading robot 2. A positioning block device 34 is provided on one side of the platform. The positioning block device 34 includes a positioning block and a positioning cylinder, which is used to coarsely position the shell pieces. The second vacuum loading platform 32 is used to receive the shell pieces that have been unloaded from the turntable mechanism 4 after the adhesive has been applied, realizing the unloading transfer. Both the first vacuum loading platform 31 and the second vacuum loading platform 32 include a lifting device and a vacuum suction cup platform. The lifting device is used to drive the vacuum suction cup platform to perform lifting and lowering movements. The drive module 33 precisely moves the first vacuum loading platform 31 to directly below the turntable mechanism 4, so that the side of the shell piece to be adsorbed is parallel and aligned with the material picking plane of the turntable 42, providing a precise positional basis for subsequent lifting and adsorption.

[0048] like Figure 5 and Figure 12 As shown, the turntable mechanism 4 includes a rotary drive device 41 and a turntable 42. The rotary drive device 41 is preferably a rotary motor, which works in conjunction with a guide slip ring 43 to achieve continuous air supply. The turntable 42 is square, vertically arranged, and has four material picking planes, each with a vacuum adsorption hole 421. Driven by the rotary drive device 41, the turntable 42 rotates counterclockwise, sequentially transporting the shell sheets to different processing stations. The four material picking planes of the square turntable correspond to the loading station, vision positioning station, adhesive application station, and unloading station, respectively. Through the counterclockwise rotation of the turntable, the shell sheets achieve seamless transfer between the stations. Compared with the traditional linear assembly line layout, this three-dimensional, rotary station arrangement significantly reduces the equipment footprint and avoids the accuracy loss caused by multiple handling and posture adjustments.

[0049] like Figure 5As shown, the visual positioning and error prevention device 5 is set at the first station of the turntable 42, preferably a CCD camera. When the turntable 42 rotates the shell sheet to this station, the CCD camera takes a picture of the shell sheet adsorbed on the turntable, obtaining the precise position and contour information of the shell sheet. The image processing algorithm is used for precise positioning and error prevention detection of irregular shapes. If the shell sheet is detected to be irregular or defective, the equipment issues an alarm signal and removes the shell sheet from the subsequent station. In this step, the visual positioning and error prevention device 5 directly detects the shell sheet adsorbed on the turntable 42, which has the following advantages: First, the shell sheet's posture is stable after being adsorbed by the turntable 42, and the visual inspection can obtain an accurate position reference; second, after the inspection is completed, the shell sheet does not need to be moved again and can directly enter the subsequent adhesive application station, avoiding the secondary positioning error caused by the traditional solution of first inspecting, then moving and then applying adhesive; third, the precise position information obtained by visual positioning can be used for rolling path compensation of the subsequent adhesive application mechanism, further improving the adhesive application accuracy. This step achieves high-precision closed-loop control of "detection equals positioning, positioning equals compensation" through deep integration of visual positioning and rotary table station.

[0050] like Figure 6 As shown, the pressing device 6 is located on the side of the turntable 42, before the adhesive application station. The pressing device 6 includes a pressing plate 61 and a pressing drive cylinder 62, which are used to press the shell sheet firmly onto the material picking plane of the turntable 42 before adhesive application, to prevent the shell sheet W from shaking during the adhesive application process.

[0051] like Figure 7 As shown, the adhesive applicator 7 includes an adhesive applicator lateral drive device 71, an adhesive applicator lateral plate 72, an adhesive applicator lateral guide rail 73, and an adhesive tape unwinding device 74, a waste adhesive tape winding device 75, an adhesive tape tensioning device 76, an adhesive tape guide roller 77, a rolling device 78, and an adhesive pressing buffer device 79 mounted on the adhesive applicator lateral plate 72.

[0052] The adhesive application transverse plate 72 is slidably mounted on the adhesive application transverse guide rail 73. The adhesive application transverse drive device 71 drives the adhesive application transverse plate 72 to move in a direction closer to or away from the turntable 42, so that the adhesive tape approaches the shell. The adhesive pressure buffer device 79 is mounted on the adhesive application transverse plate 72. When the adhesive application transverse drive device 71 drives the adhesive application transverse plate 72 to move, the adhesive pressure buffer device 79 provides buffering to absorb the impact during the movement and ensure the smooth operation of the adhesive application mechanism.

[0053] The belt guide roller 77 is provided with a limiting groove 771 to prevent the belt E from deviating during conveying. The belt tensioning device 76 is used to maintain the belt tension stably during conveying.

[0054] like Figure 8As shown, the rolling device 78 includes a pressure-pressing transverse module 781, a pressure-pressing roller 782, and a pressure-pressing drive cylinder 783. The pressure-pressing transverse module 781 drives the pressure-pressing roller 782 to approach the tape on the shell, and the pressure-pressing drive cylinder 783 drives the pressure-pressing roller 782 to roll and adhere the tape to the surface of the shell in the front-back direction (i.e., the direction perpendicular to the tape's travel direction).

[0055] like Figure 9 As shown, the adhesive application buffer device 79 includes a fixed mounting plate 791, a buffer moving block 792, a buffer spring, and an angle adjusting block 794. The buffer moving block 792 is slidably mounted on the fixed mounting plate 791 via a slide rail. The buffer spring (not shown) is connected between the fixed mounting plate 791 and the buffer moving block 792 to provide elastic buffering force to the buffer moving block 792. A buffer roller 795 is rotatably connected to the end of the buffer moving block 792 via the angle adjusting block 794. When the adhesive application transverse plate 72 moves towards the turntable 42, the buffer roller 795 contacts the shell or turntable before the adhesive tape, absorbing the impact energy through the elastic deformation of the buffer spring, thus achieving the buffering function.

[0056] like Figure 10 As shown, the laser tape cutting mechanism 8 is located after the tape application mechanism 7, and includes a laser tape cutting head 81 and a laser traversing module 82. The laser traversing module 82 is used to drive the laser tape cutting head 81 to move along a preset trajectory, and precisely cut the tape applied to the shell according to a preset shape (such as a square). After cutting, the waste material around the tape is wound up and recycled by the waste tape winding device 75.

[0057] like Figure 11 As shown, the hot pressing device 9 is located on the side of the turntable mechanism 4, and includes a mounting base 91, a hot pressing cylinder 92, a pressure sensor 93, an upper pressing block 94, and a hot pressing support base 95. The hot pressing support base 95 is equipped with a heatable lower pressing head 96. The upper pressing block 94 is mounted on the output end of the hot pressing cylinder 92, and the hot pressing cylinder 92 drives the upper pressing block 94 to move downwards to cooperate with the lower pressing head 96 for pressing. Both the lower pressing head 96 and the upper pressing block 94 have built-in heating rods as heating sources. The pressure sensor 93 is used to monitor the pressing force in real time to ensure that the hot pressing pressure is within the set range.

[0058] A handling robot is provided between the turntable mechanism 4 and the hot pressing device 9. The handling robot takes the shell piece that has been glued and cut from the turntable 42 and sends it between the lower pressure head 96 and the upper pressure block 94 of the hot pressing device 9 for heating and pressure holding, so that the adhesive paper and the shell piece are more firmly bonded.

[0059] The AOI inspection unit 10 is located after the hot pressing device 9 and includes a vision inspection camera and a light source. After hot pressing, the shell sheet is transferred to the AOI inspection station by a conveyor belt or a robot. The vision inspection camera takes pictures of the adhesive tape on the shell sheet and uses image processing algorithms to detect appearance defects such as the size, edge distance, bubbles, and wrinkles of the adhesive tape.

[0060] The unloading mechanism 11 includes a good product unloading robot, a defective product rejection device, a good product tray, and a defective product collection area. The unloading mechanism 11 receives the detection result signal from the AOI inspection mechanism 10, picks up qualified shells and places them into the good product tray, and picks up unqualified shells and places them into the defective product collection area. When the good product tray is full, the tray transport device moves the full tray to the empty tray buffer area and automatically loads a new empty tray.

[0061] The working process of the automatic adhesive applicator for battery casings of the present invention will be described in detail below with reference to the above structure.

[0062] After the equipment starts, the material tray loading and unloading mechanism 1 transports a full tray containing shell pieces to the loading station. The material tray photographing device takes pictures of the shell pieces in the tray to determine whether there is material in the tray and the incoming posture of the shell pieces. The loading robot 2 moves above the material tray, and the two sets of material-grabbing suction cups descend simultaneously, grabbing two shell pieces at a time, and then placing the shell pieces on the first vacuum loading platform 31 of the transfer mechanism 3. The positioning cylinder of the positioning block device 34 drives the positioning block to move, performing coarse positioning of the shell pieces. The vacuum suction hole of the first vacuum loading platform 31 opens, adsorbing and fixing the shell pieces.

[0063] The drive module 33 drives the first vacuum loading platform 31 to move along the Y-axis to below the turntable 42. The lifting device of the first vacuum loading platform 31 lifts upward, so that the side of the horizontally placed shell plate contacts the material picking plane of the turntable 42, and the vacuum suction hole of the turntable 42 opens, adsorbing the shell plate onto the turntable 42. Subsequently, the lifting device of the first vacuum loading platform 31 lowers and resets, completing the transfer of the shell plate from a horizontal state to a vertical state.

[0064] The rotary drive device 41 drives the turntable 42 to rotate counterclockwise, transporting the shell sheet to the first station, which is below the vision positioning and error-proofing device 5. The vision positioning and error-proofing device 5 takes pictures of the shell sheet to obtain its precise position information and irregularity defect information. If a defect is detected in the shell sheet, the equipment records it as a defective product and removes it from the subsequent unloading station.

[0065] Turntable 42 continues to rotate, transporting the shell sheet to the pressing station. The pressing device 6 activates, pressing the shell sheet firmly onto the material picking plane of turntable 42, ensuring the shell sheet remains stable during the adhesive application process.

[0066] The adhesive application mechanism 7's adhesive application lateral drive device 71 drives the adhesive application lateral plate 72 to move closer to the turntable 42, bringing the adhesive tape closer to the shell surface. As the tape approaches the shell, the pressure buffer device 79 absorbs the impact during the approach process through the elastic deformation of the buffer spring. Subsequently, the pressure roller 782 is driven by the pressure lateral module 781 to approach the tape, and the pressure roller 782 is driven by the pressure drive cylinder 783 to move in the back-and-forth direction, rolling and bonding the tape to the shell surface. After adhesive application is completed, the tape unwinding device 74 and the waste tape winding device 75 work together to complete the tape step-feeding.

[0067] The laser cutting head 81 of the laser adhesive cutting mechanism 8 is activated according to a preset cutting trajectory (such as a square shape). The laser traverse module 82 drives the laser cutting head 81 to move, precisely cutting the adhesive tape attached to the shell. After cutting, the waste adhesive tape is wound up and recycled by the waste adhesive tape winding device 75.

[0068] The turntable 42 rotates the cut shell sheet to the unloading station. A handling robot removes the shell sheet from the turntable 42 and feeds it between the lower pressure head 96 and the upper pressure block 94 of the hot pressing device 9. The hot pressing cylinder 92 drives the upper pressure block 94 downwards to engage with the lower pressure head 96 for pressing. Simultaneously, a heating rod heats the shell sheet to a set temperature, heating and maintaining pressure on the adhesive tape. After the pressure holding time is completed, the upper pressure block 94 resets. The pressure sensor 93 monitors the pressing force in real time to ensure stable hot pressing pressure.

[0069] After hot pressing, the shell sheet is transferred to the inspection station of the AOI inspection mechanism 10 via a conveyor belt or robotic arm. The visual inspection camera takes pictures of the adhesive tape on the shell sheet, and the image processing algorithm detects appearance defects such as the size, edge distance, bubbles, and wrinkles of the adhesive tape, and generates inspection result signals.

[0070] The unloading mechanism 11 receives the detection result signal from the AOI inspection mechanism 10. If the shell sheet passes the inspection, the good product unloading robot picks up the shell sheet and places it into the good product tray; if the shell sheet fails the inspection, the defective product rejection device picks up the shell sheet and places it into the defective product collection area. After the good product tray is full, the tray transport device moves the full tray to the empty tray buffer area and automatically loads a new empty tray.

[0071] This completes a full cycle of automated adhesive application for battery casings. The above steps are executed cyclically to achieve continuous, automated production of battery casing adhesive application.

[0072] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. For those skilled in the art, the present invention can have various modifications and variations. For example, the number of material-picking planes on the turntable 42 can be set to three, five, or more according to actual workstation requirements; the visual positioning and error-proofing device 5 can employ a combination of multiple cameras to achieve multi-angle positioning; the hot pressing device 9 can be configured for multi-station parallel hot pressing to improve efficiency, etc. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

[0073] The embodiments described above are merely preferred embodiments of this application. It should be noted that those skilled in the art can make several improvements and substitutions without departing from the technical principles of this application, and these improvements and substitutions should also be considered within the scope of protection of this application.

Claims

1. An automatic adhesive applicator for battery casings, characterized in that, Includes the rack and the following mechanisms mounted on the rack: The material tray loading and unloading mechanism includes a material bin and a material tray conveying device, used for buffering and supplying material trays loaded with shell pieces, and for recovering empty material trays; A loading robot is used to grab shell pieces from the loading / unloading mechanism of the material tray and place them on the transfer mechanism; The transfer mechanism includes at least one vacuum loading platform and a drive module that drives the vacuum loading platform to move along the Y-axis. The vacuum loading platform is used to receive the shell pieces placed by the loading robot. The turntable mechanism includes a rotatable, vertically arranged turntable with multiple material picking surfaces, each of which is provided with a vacuum adsorption hole. When the transfer mechanism moves to the area below the turntable, the vacuum feeding platform lifts upward, so that the side of the shell is picked up by the adsorption surface of the turntable, completing the transfer of the shell from a horizontal state to a vertical state. A visual positioning and error-proofing device is set at the first station of the turntable to photograph the shell pieces adsorbed by the turntable for precise positioning and error-proofing detection of irregular shapes. A pressing device is located on the side of the turntable and is used to press the shell sheet firmly onto the turntable before applying adhesive. The adhesive applicator includes an adhesive tape unwinding device and a rolling device, wherein the rolling device is used to roll the unwound adhesive tape and apply it to the surface of the shell on the turntable. A laser tape cutting mechanism is located after the tape application mechanism and is used to cut the tape applied to the shell sheet according to a preset shape. A hot pressing device, including a heatable lower pressure head and an upper pressure block, is used to heat and press the adhesive paper on the shell sheet that has been glued and cut. An AOI inspection mechanism is located after the hot pressing device and is used to perform appearance inspection on the hot-pressed adhesive tape. The feeding mechanism is used to feed qualified shell pieces into the material tray and reject defective products.

2. The automatic adhesive applicator for battery casings according to claim 1, characterized in that, The transfer mechanism includes two vacuum loading platforms, namely a first vacuum loading platform and a second vacuum loading platform; a positioning block device is provided on one side of the first vacuum loading platform for coarse positioning of the shell sheet.

3. The automatic adhesive applicator for battery casings according to claim 1, characterized in that, The turntable is a square turntable with four material picking planes; the turntable mechanism also includes a rotary drive device for driving the turntable to rotate counterclockwise and sequentially transport the shell pieces to different processing stations.

4. The automatic adhesive applicator for battery casings according to claim 1, characterized in that, The loading robot is a multi-axis robotic arm with two sets of material-grabbing suction cups at its end. The distance between the two sets of material-grabbing suction cups is adjustable, and each set of material-grabbing suction cups can be raised and lowered independently to grab two shell pieces at a time.

5. The automatic adhesive applicator for battery casings according to claim 1, characterized in that, The rolling device includes a pressing transverse module, a pressing roller, and a pressing drive cylinder. The pressing transverse module drives the pressing roller to approach the tape on the shell, and the pressing drive cylinder drives the pressing roller to roll the tape onto the shell in the front-back direction.

6. The automatic adhesive applicator for battery casings according to claim 1, characterized in that, The hot pressing device also includes a hot pressing cylinder, a pressure sensor, and a mounting base; the heatable lower pressure head and upper pressure block have built-in heating rods as heating sources.

7. The automatic adhesive applicator for battery casings according to claim 1, characterized in that, The adhesive application mechanism also includes a waste tape winding device, a tape tensioning device, and a tape guide roller, wherein the tape guide roller is provided with a limiting groove.

8. The automatic adhesive applicator for battery casings according to claim 1, characterized in that, The laser cutting mechanism includes a laser cutting head and a laser traverse module. The laser traverse module is used to drive the laser cutting head to move so as to cut a square-shaped piece of tape on the shell.

9. An automatic adhesive application method for battery casings, characterized in that, Includes the following steps: S1. The loading robot grabs the shell pieces from the loading and unloading mechanism of the material tray and places the shell pieces on the vacuum loading platform of the transfer mechanism; S2. The vacuum loading platform is moved to the bottom of the turntable by the drive module. The vacuum loading platform is lifted up so that the side of the horizontally placed shell is attracted by the vertically set turntable, thus completing the transfer of the shell from a horizontal state to a vertical state. S3. Take pictures of the shell pieces adsorbed on the turntable using a visual positioning and error-proofing device to obtain the precise position information and irregular defect information of the shell pieces. S4. The pressing device presses the shell sheet onto the turntable. The adhesive applicator drives the tape close to the shell sheet, and then the rolling device of the adhesive applicator rolls and applies the tape to the surface of the shell sheet. S5. The tape attached to the shell is cut according to the preset shape by the laser tape cutting mechanism; S6. Transfer the glued and cut shell pieces to the hot press device, and use heat and pressure to firmly bond the adhesive paper to the shell pieces; S7. The appearance of the hot-pressed adhesive tape is inspected by an AOI inspection agency. S8. Based on the test results, the good products and defective products are fed separately through the feeding mechanism.

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