Lithium battery packaging machine

Abstract

The utility model relates to a packaging machine, and provides a lithium battery packaging machine which comprises a workbench, a supporting frame, a rotating seat, a rotating platform, a supporting plate and the like, a supporting frame is arranged on the workbench, a rotating seat is arranged on the lower portion in the workbench, a rotating platform is installed on the top of the rotating seat, the rotating seat drives the rotating platform to rotate anticlockwise by 90 degrees intermittently, and four supporting plates are arranged on the rotating platform in the circumferential direction. According to the utility model, through the arrangement of the flexible pressing mechanism, when a battery cell placed between two layers of aluminum plastic films is packaged and a liquid bag in the flexible pressing mechanism presses the battery cell, the surface of the flexible pressing mechanism can completely cover a film material wrapping the battery cell, gas in the two films is exhausted, and the applied pressure in each area is uniform; therefore, the problems of local stress concentration, non-uniform thickness after melting or gas residue caused by traditional rigid pressing are effectively avoided, the packaging sealing performance and the battery cell safety are remarkably improved, and meanwhile, the self-adaptive deformation characteristic of the liquid bag can meet the packaging process requirements of battery cells with different thicknesses.

Description

Technical Field

[0001] This utility model relates to a packaging machine, and more particularly to a lithium battery packaging machine. Background Technology

[0002] Battery encapsulation involves placing the battery cell between two layers of aluminum-plastic film, with the PP sides of the two layers facing each other. Through a pressing component, heat and pressure are applied to melt the PP layers of the aluminum-plastic film, causing them to completely melt together and form a whole, thus achieving the sealing effect of battery cell encapsulation.

[0003] In existing battery heat sealing processes, the pressing components typically employ a rigid, single-point pressurization method. During processing, this often results in severely uneven pressure distribution. The battery edge areas experience insufficient melting due to pressure decay, while the central area suffers from excessive material compression due to pressure concentration. Furthermore, the equipment cannot compensate for the deformation of large-size batteries after heating, causing fluctuations in the sealing layer thickness. These defects not only reduce packaging reliability but also exacerbate the risks of electrolyte leakage and thermal runaway due to localized overheating and pressure imbalance. Utility Model Content

[0004] In order to overcome the shortcomings of the existing technology, the objective is to provide a lithium battery packaging machine.

[0005] The technical solution of this utility model is: a lithium battery packaging machine, including a worktable, a support frame, a rotating seat, a rotating platform, a tray, a current-guiding seat, and an electric cylinder. The worktable is provided with a support frame, and the lower part of the worktable is provided with a rotating seat. The rotating seat is mounted on the top of the rotating seat and the rotating platform is driven to rotate counterclockwise 90 degrees intermittently. The rotating platform is provided with four trays on the circumference, and each tray is provided with a current-guiding seat. The current-guiding seat has a feeding groove, and the current-guiding seat is provided with multiple interfaces for introducing heat flow and multiple heat flow outlets. The current-guiding seat is provided with a current-guiding channel, which connects the interfaces and the heat flow outlets. The heat flow outlets are all facing the feeding groove side. The upper right side of the support frame is vertically provided with an electric cylinder, which is located above the rotation path of the rotating platform. The drive rod of the electric cylinder is provided with a flexible pressing mechanism, which moves up and down with the movement of the electric cylinder drive rod.

[0006] Furthermore, the flexible pressing mechanism includes a fixed base, a frame, a liquid bladder, a sealing frame, and a pressing cylinder. The fixed base is fixedly connected to the lower end of the drive rod of the electric cylinder and moves up and down with the extension and retraction of the electric cylinder. The fixed base is equipped with an injection and drainage module and a pressure control unit. A liquid bladder is installed at the lower part of the fixed base and is connected to the injection and drainage module inside the fixed base. A frame is provided at the lower part of the fixed base and is arranged around the outside of the liquid bladder to maintain the main shape of the liquid bladder. Pressing cylinders are vertically installed on both the front and rear sides of the fixed base. A sealing frame is connected between the lower parts of the moving rods of the pressing cylinders, and the pressing cylinder drives the sealing frame to move up and down.

[0007] Furthermore, it also includes pads, with each material feeding trough equipped with a pad featuring a contour positioning groove.

[0008] Furthermore, it also includes a re-inspection machine, which is located on the upper rear side of the support frame, with the inspection end of the re-inspection machine facing downwards.

[0009] Furthermore, it also includes a feeding platform, with feeding platforms located on both the front and left sides of the workbench.

[0010] Furthermore, it also includes a transmission component, a material-picking cylinder, and a suction cup frame. The transmission component is located on the upper seat side of the support frame, and the material-picking cylinder is located on the transmission component. The suction cup frame is located at the lower end of the movable rod of the material-picking cylinder. The transmission component drives the material-picking cylinder to move left and right, which in turn drives the suction cup frame to move left and right. When the suction cup frame moves to the right, it will pass over the material-discharging platform on the left side.

[0011] The beneficial effects are as follows: By setting up a flexible pressing mechanism, when the battery cell placed between two layers of aluminum-plastic film is being packaged, the surface of the liquid bladder in the flexible pressing mechanism can completely cover the film material covering the battery cell when pressing the battery cell, thus venting the gas inside the two films and applying uniform pressure to each area. This effectively avoids the problems of local stress concentration or gas residue caused by traditional rigid pressing, significantly improving the sealing performance and battery cell safety. At the same time, the adaptive deformation characteristics of the liquid bladder can be compatible with the packaging process requirements of battery cells of different thicknesses.

[0012] This invention features a flexible pad with a contoured positioning groove inside the feeding slot. During feeding and pressing, the contoured structure can accurately position the battery cell. At the same time, the flexible material can buffer the impact of pressing, avoid damage to the battery cell surface, and automatically compensate for the battery cell thickness tolerance, ensuring uniform stress on the film material during the packaging process, effectively improving the packaging yield and product consistency.

[0013] This invention sets up a re-inspection machine on the path of the battery cell moving to the feeding station after it is packaged. The packaging quality is re-inspected online through a vision inspection system, and in conjunction with an automatic feeding mechanism, the finished product is automatically fed, effectively reducing labor costs. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the first three-dimensional structure of this utility model.

[0015] Figure 2 This is a schematic diagram of the second three-dimensional structure of the present invention.

[0016] Figure 3 This is a three-dimensional structural diagram of the rotating seat, rotating platform, and tray of this utility model.

[0017] Figure 4 This is a three-dimensional structural diagram of the components of this utility model, including the tray, the drainage seat, and the pad.

[0018] Figure 5 This is a three-dimensional structural diagram of the flexible pressing mechanism of this utility model.

[0019] Figure 6 This is a three-dimensional structural diagram of the support frame, inspection machine, and unloading mechanism of this utility model.

[0020] In the attached diagram, the following labels are used: 1-Workbench, 2-Support frame, 3-Rotating seat, 4-Rotating platform, 5-Pattern, 6-Drainage seat, 601-Hot flow outlet, 602-Interface, 7-Padded block, 8-Electric cylinder, 81-Fixed seat, 82-Frame, 83-Liquid bladder, 84-Sealing frame, 85-Pressure cylinder, 9-Re-inspection machine, 10-Transmission component, 11-Material handling cylinder, 12-Suction cup frame, 13-Discharging platform. Detailed Implementation

[0021] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0022] Example 1

[0023] This utility model relates to a lithium battery packaging machine, such as... Figure 1-6 As shown, the system includes a workbench 1, a support frame 2, a rotating seat 3, a rotating platform 4, a tray 5, a flow guide seat 6, and an electric cylinder 8. The support frame 2 is fixedly mounted on the workbench 1, with the rotating seat 3 located below it. The rotating seat 3 is driven by a servo motor to rotate the top-connected rotating platform 4 counterclockwise 90 degrees intermittently. Four trays 5 are evenly distributed circumferentially on the rotating platform 4, each tray 5 being bolted to the flow guide seat 6. The top of the flow guide seat 6 is machined with a sunken contoured feeding groove. The stepped structure inside the groove matches the shape of the battery cell wrapped in aluminum-plastic film, ensuring horizontal positioning of the battery cell. Multiple hot air outlets 601 are opened on the side wall of the feeding groove and connected to an external hot air interface 602 through an internal flow channel. The interface 602 is connected to an external hot air generator. The hot air outlets 601 blow high-temperature airflow at a specific angle toward the edge of the aluminum-plastic film, melting the PP layer to achieve initial bonding. The electric cylinder 8 is vertically mounted on the upper right side of the support frame 2, with its drive rod directly above the rotation path of the rotating platform 4. The end of the drive rod is connected to a flexible pressing mechanism.

[0024] Among them, such as Figure 1 and Figure 5As shown, the flexible pressing mechanism includes a fixed base 81, a frame 82, a liquid bladder 83, a sealing frame 84, and a pressing cylinder 85. The fixed base 81 is rigidly connected to the drive rod of the electric cylinder 8 via a flange. It integrates an injection / discharge module and a pressure control unit. The pressure control unit dynamically adjusts the hydraulic pressure inside the liquid bladder 83 through a pressure sensor and a proportional valve. The liquid bladder 83, made of silicone material, is installed at the bottom of the fixed base 81. The injection / discharge module is connected to the liquid bladder 83 through a pipeline to realize hydraulic filling and discharging. The liquid bladder 83 is covered with a metal frame 82. The frame 82 has a ring frame structure, which restricts the lateral expansion of the liquid bladder 83 but allows its bottom to deform freely to fit the surface of the battery cell. A pressing cylinder 85 is installed on each of the front and rear sides of the fixed base 81. The piston rod end is connected to the sealing frame 84 through a hinge. The sealing frame 84 has a built-in heating element. When pressing, it is energized and heated to the heat sealing temperature of the aluminum-plastic film.

[0025] During operation, the battery cell covered with aluminum-plastic film is placed in the feeding trough. The rotating platform 4 rotates intermittently to deliver the battery cell to the pressing station. The electric cylinder 8 drives the liquid bladder 83 to press down. The pressure control unit gradually increases the internal pressure of the liquid bladder 83, causing its bottom to expand flexibly, completely adhering to the surface of the battery cell and evenly expelling the gas between the aluminum-plastic film. Subsequently, the hot air outlet 601 blows out hot air to melt the PP layer. The pressing cylinder 85 drives the preheated sealing frame 84 to press down, applying high temperature pressure to the edge of the aluminum-plastic film to complete the seal. The flexible adaptive pressing of the liquid bladder 83 eliminates the influence of battery cell thickness tolerance. Combined with the constraint of the skeleton 82, it ensures that the pressing surface is flat and wrinkle-free. At the same time, the stepped feeding trough and the precise indexing of the rotating platform improve the packaging yield. Furthermore, the directional blowing of the hot air outlet 601 ensures that the PP layer melts evenly, avoiding the problems of local over-melting or poor soldering caused by traditional hot pressing.

[0026] Example 2

[0027] Based on Example 1, such as Figure 3 and Figure 4 As shown, each of the feeding slots of the drain seat 6 is equipped with a pad 7. The pad 7 is made of flexible materials such as silicone or polyurethane. Its surface is processed with a contour positioning groove that precisely matches the shape of the battery cell. When the battery cell is placed, it is positioned by the buffer of the flexible material to avoid hard contact and damage to the coating on the surface of the battery cell. At the same time, it adaptively compensates for the dimensional tolerance of battery cells of different thicknesses during the pressing process to ensure that the packaging pressure is evenly distributed on the surface of the aluminum-plastic film.

[0028] Among them, such as Figure 2 and Figure 6 As shown, the upper rear side of the support frame 2 is equipped with a re-inspection machine 9. The re-inspection machine 9 adopts a high-resolution CCD vision inspection system. Its inspection end faces downward and is directly opposite the inspection station of the rotating platform 4. It can perform online inspection of defects such as the integrity of the aluminum-plastic film sealing edge, the width of the heat sealing line and surface wrinkles. The inspection data is uploaded to the MES system in real time to realize quality traceability and form a complete production data chain.

[0029] In the specific layout, the front of the workbench 1 is set as the loading station, where the battery cells covered with aluminum-plastic film are accurately placed into the feeding trough by manual labor or robotic arms; the right side is the pressing station, the rear is the inspection station, and the left side is the unloading station, which is divided into qualified and defective product sorting areas. The rotating seat 3 drives the rotating platform 4 to rotate intermittently with a step angle of 90°, so that the battery cells pass through the pressing station to complete heat sealing, the inspection station to perform quality judgment, and the unloading station to perform automatic sorting before returning to the loading station, forming a closed-loop production cycle.

[0030] In addition, a feeding platform 13 is provided on the front and left sides of the workbench 1. The surface of the front feeding platform 13 is covered with an anti-static mat for stacking the battery cells to be packaged, and the left feeding platform 13 is used to place the packaged battery cells.

[0031] Among them, such as Figure 2 and Figure 6 As shown, it also includes a transmission component 10, a picking cylinder 11, and a suction cup frame 12: The transmission component 10, which adopts a linear module, is installed on the upper left side of the support frame 2. The picking cylinder 11 is slidably installed on the transmission component 10. The end of the cylinder's movable rod is connected to the suction cup frame 12. The bottom of the suction cup frame 12 is equipped with an array of silicone suction cups and a vacuum generator. When the battery cell arrives at the unloading station, the transmission component 10 drives the picking cylinder 11 to move to the right along the X-axis, dividing the good / defective sorting area on the unloading platform 13. The different movement strokes of the suction cup frame after picking up the battery cell achieve rapid classification by partitioning. Specifically, the picking cylinder 11 drives the suction cup frame 12 to descend and contact the battery cell. After vacuum adsorption, it is lifted up, and then the transmission component 10 moves to the left to transfer the battery cell to the corresponding area of ​​the unloading platform 13 on the left. The sorting logic is controlled in real time by the detection signal of the re-inspection machine 9 to achieve fully automatic sorting and unloading.

[0032] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A lithium battery packaging machine, comprising a worktable (1); Its features are: It also includes a support frame (2), a rotating seat (3), a rotating platform (4), a tray (5), a flow guide seat (6), and an electric cylinder (8). The support frame (2) is provided on the workbench (1). The rotating seat (3) is provided in the lower part of the workbench (1). The rotating platform (4) is installed on the top of the rotating seat (3). The rotating seat (3) drives the rotating platform (4) to rotate 90 degrees counterclockwise intermittently. The rotating platform (4) has four trays (5) arranged circumferentially. Each tray (5) is provided with a flow guide seat (6). The flow guide seat (6) has a discharge chute. 6) It is provided with multiple interfaces (602) for introducing heat flow and multiple heat flow outlets (601). The heat flow seat (6) is provided with a heat flow channel inside. The heat flow channel connects the interface (602) and the heat flow outlet (601). The heat flow outlets (601) all face the side of the discharge trough. The upper right side of the support frame (2) is provided with an electric cylinder (8). The electric cylinder (8) is located above the rotation path of the rotating platform (4). The drive rod of the electric cylinder (8) is provided with a flexible pressing mechanism. The flexible pressing mechanism moves up and down with the action of the drive rod of the electric cylinder (8).

2. The lithium battery packaging machine as described in claim 1, characterized in that: The flexible pressing mechanism includes a fixed base (81), a frame (82), a liquid bladder (83), a sealing frame (84), and a pressing cylinder (85). The fixed base (81) is fixedly connected to the lower end of the drive rod of the electric cylinder (8) and moves up and down with the extension and retraction of the electric cylinder (8). The fixed base (81) is equipped with an injection and drainage module and a pressure control unit. The liquid bladder (83) is installed at the lower part of the fixed base (81). The liquid bladder (83) is connected to the injection and drainage module inside the fixed base (81). The frame (82) is provided at the lower part of the fixed base (81). The frame (82) is arranged around the outside of the liquid bladder (83) to maintain the main shape of the liquid bladder (83). The pressing cylinder (85) is vertically provided on both the front and rear sides of the fixed base (81). The sealing frame (84) is connected between the lower parts of the movable rod of the pressing cylinder (85). The pressing cylinder (85) drives the sealing frame (84) to move up and down.

3. A lithium battery packaging machine as described in claim 2, characterized in that: It also includes pads (7), and each material feeding trough is provided with pads (7) with contour positioning grooves.

4. A lithium battery packaging machine as described in claim 3, characterized in that: It also includes a re-inspection machine (9), which is provided on the upper rear side of the support frame (2), with the detection end of the re-inspection machine (9) facing downwards.

5. A lithium battery packaging machine as described in claim 4, characterized in that: It also includes a feeding platform (13), with feeding platforms (13) provided on the front and left sides of the workbench (1).

6. A lithium battery packaging machine as described in claim 5, characterized in that: It also includes a transmission component (10), a material picking cylinder (11), and a suction cup frame (12). The upper seat side of the support frame (2) is provided with a transmission component (10), and a material picking cylinder (11) is provided on the transmission component (10). The lower end of the movable rod of the material picking cylinder (11) is provided with a suction cup frame (12). The transmission component (10) drives the material picking cylinder (11) to move left and right, which in turn drives the suction cup frame (12) to move left and right. When the suction cup frame (12) moves to the right, it will pass over the material feeding platform (13) on the left side.

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