Rotary high speed lamination machine

Abstract

The application provides a rotary disc type high-speed laminating machine, which comprises a rotating disc, a positive electrode sheet warehouse, a first positive electrode sheet positioning assembly, a first laminating assembly, a first negative electrode sheet positioning assembly, a negative electrode sheet warehouse, a second negative electrode sheet positioning assembly, a second positive electrode sheet positioning assembly, a second laminating assembly and a diaphragm unwinding assembly. The rotating disc comprises a servo motor, a swing type divider and an eight-station disc with suction cups. The eight-station disc and the double laminating assemblies operate in parallel, and the laminating speed can reach 0.3-0.5 seconds per sheet, which significantly improves the production capacity. The overall position accuracy of the electrode sheet during the laminating process is ±0.5 mm, and the electrode sheet misregistration rate is greatly reduced. The whole process from the electrode sheet feeding, laminating, rubber bonding to discharging is fully automated, the manual intervention is reduced, and the consistency is high. The mechanical hand, the material box and the secondary positioning mechanism are arranged in a symmetrical and open mode, so that the operation, model change, maintenance and repair are more convenient and fast. The dust removal and deviation correction have a synergistic effect, which avoids the pollution of the electrode sheet and the wrinkling of the diaphragm, and improves the yield.

Description

Technical Field

[0001] This invention relates to the field of battery processing technology, and in particular to a rotary high-speed stacking machine. Background Technology

[0002] The rotary high-speed stacking machine for batteries is a core piece of equipment in the manufacturing of prismatic battery cells. It achieves high-speed, high-precision assembly of the "Z"-shaped cell structure through precise coordination of multiple workstations. It employs an intermittently rotating turntable (typically pausing every 45° rotation), equipped with multiple stacking tables. During each pause cycle, the workstations distributed around the turntable simultaneously perform operations such as electrode gripping, separator folding, electrode stacking, and electrode positioning, thereby achieving parallel operation and greatly improving efficiency.

[0003] However, existing rotary high-speed stacking machines for batteries are prone to electrode misalignment during the stacking process, which affects battery energy density and increases the risk of short circuits. Summary of the Invention

[0004] The purpose of this invention is to provide a rotary high-speed stacking machine to solve the problems of existing rotary high-speed stacking machines.

[0005] This invention provides a rotary high-speed stacking machine, including a rotating disk and a positive electrode hopper, a first positive electrode positioning assembly, a first stacking assembly, a first negative electrode positioning assembly, a negative electrode hopper, a second negative electrode positioning assembly, a second positive electrode positioning assembly, and a second stacking assembly arranged circumferentially around the rotating disk. A diaphragm unwinding assembly is provided on one side of both the first and second stacking assemblies. The rotating disk includes a servo motor, a swing-type divider connected to the servo motor, and a suction cup-type eight-station disk connected to the swing-type divider.

[0006] The aforementioned rotary high-speed stacking machine features an eight-station rotary table and dual stacking assembly operating in parallel, achieving a stacking speed of 0.3-0.5 seconds per piece, significantly increasing production capacity. It boasts active unwinding, tension control, overall module alignment correction, and diaphragm static elimination, ensuring diaphragm alignment accuracy of ±0.3mm. Precise electrode positioning guarantees an overall electrode position accuracy of ±0.5mm during stacking, greatly reducing electrode misalignment. The entire process, from electrode loading, stacking, adhesive application to unloading, is fully automated, minimizing manual intervention and ensuring high consistency. The symmetrical open layout of the robotic arm, material box, and secondary positioning mechanisms facilitates convenient and efficient operation, changeover, maintenance, and repair. Dust removal and alignment correction work synergistically to prevent electrode contamination and diaphragm wrinkles, improving yield.

[0007] Furthermore, the positive electrode material hopper includes a first feeding lifting motor, a first material box located at the upper end of the first feeding lifting motor, a first detection sensor located at the upper edge of the first material box, a plurality of dispensing brushes located at the edge of the first material box, and an ion gas bar located at the edge of the first material box.

[0008] Furthermore, the first negative electrode positioning assembly includes a negative electrode positioning cylinder, four negative electrode positioning blocks connected to the negative electrode positioning cylinder, and a negative electrode dust collection device disposed between the four negative electrode positioning blocks. An ultrasonic sensor is provided in the middle of the first negative electrode positioning assembly.

[0009] Furthermore, the first positive electrode positioning assembly includes a positive electrode positioning cylinder, four positive electrode positioning blocks connected to the positive electrode positioning cylinder, and a positive electrode dust collection device disposed between the four positive electrode positioning blocks. It also includes an ultrasonic sensor to prevent multiple positive electrode sheets from being located on the processing platform. The first positive electrode positioning assembly moves inward and outward during operation.

[0010] Furthermore, the first stacking assembly includes a servo module, a stacking platform disposed on the upper end of the servo module, two left-side pressing cylinders, two right-side pressing cylinders disposed on the stacking platform, and inner and outer displacement cylinders.

[0011] Furthermore, the diaphragm unwinding assembly includes an unwinding motor, a web guiding device, a left-right swaying device, and a web guiding sensor.

[0012] Furthermore, the rotary high-speed stacking machine also includes a material unloading rotary robot assembly, which includes a first shifting module, a first rotating module, and a first clamping device to pick up the battery cell from the stacking platform and place it on the adhesive application platform.

[0013] Furthermore, it also includes an adhesive application platform assembly and an adhesive application mechanism. The adhesive application platform assembly includes a second shifting module, a second rotating module, and a second clamping device for clamping the battery cells when applying adhesive to the battery side surfaces.

[0014] Furthermore, the adhesive application mechanism includes an X-axis module, a Y-axis module, a tensioning device, and an adhesive application head device, used for applying adhesive to the sides of the battery cell.

[0015] Furthermore, it also includes a discharge assembly, which further includes a stepper motor, a discharge conveyor belt, and a material handling cylinder. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of a rotary high-speed stacker according to the first embodiment of the present invention from a first perspective.

[0017] Figure 2 for Figure 1A three-dimensional structural diagram of a rotary high-speed stacker from a second perspective.

[0018] Figure 3 for Figure 1 A three-dimensional structural diagram of the rotating disk in a rotary high-speed stacking machine;

[0019] Figure 4 for Figure 1 A three-dimensional structural diagram of the positive electrode sheet hopper in a rotary high-speed stacking machine;

[0020] Figure 5 for Figure 1 A three-dimensional structural diagram of the first negative electrode positioning component in a rotary high-speed stacking machine;

[0021] Figure 6 for Figure 1 A three-dimensional structural diagram of the first positive electrode positioning component in a rotary high-speed stacking machine;

[0022] Figure 7 for Figure 1 A three-dimensional structural diagram of the first stacking assembly in a rotary high-speed stacking machine;

[0023] Figure 8 for Figure 1 A three-dimensional structural diagram of the diaphragm unwinding assembly in a rotary high-speed stacker;

[0024] Figure 9 for Figure 1 A three-dimensional structural diagram of a rotary high-speed stacking machine for unloading a rotating robotic arm assembly.

[0025] Figure 10 for Figure 1 A three-dimensional structural diagram of the adhesive application platform component in a rotary high-speed stacking machine;

[0026] Figure 11 for Figure 1 A three-dimensional structural diagram of the adhesive application mechanism in a rotary high-speed stacking machine;

[0027] Figure 12 for Figure 1 A three-dimensional structural diagram of the discharge assembly in a rotary high-speed stacking machine; Explanation of main component symbols:

[0028] Rotating disk 10 Left side clamping cylinder 43 First shifting module 111 Servo motor 11 Right side clamping cylinder 44 First rotating module 112 Swing divider 12 First negative electrode positioning component 50 First clamping device 113 Suction Cup Type Eight-Station Disc 13 Negative positioning cylinder 51 Adhesive application platform components 120 Positive electrode material bin 20 Negative electrode positioning block 52 Second shifting module 121 First feeding lifting motor 21 Negative electrode dust collection device 53 Second rotating module 122 First box 22 Negative electrode wafer silo 60 Second clamping device 123 First detection sensor 23 Second negative electrode positioning component 70 Adhesive application mechanism 130 Material separating brush 24 Second positive electrode positioning component 80 X-axis module 131 First positive electrode positioning component 30 Second stack assembly 90 Y-axis module 132 Positive positioning cylinder 31 Diaphragm unwinding assembly 100 tensioning device 133 Positive positioning block 32 Unwinding motor 101 Adhesive applicator 134 Positive electrode dust collection device 33 Correction device 102 Discharge assembly 140 First stack assembly 40 left and right swing device 103 Stepper motor 141 Servo Module 41 Correction sensor 104 discharge conveyor belt 142 Stacking platform 42 Rotary unloading robot 110

[0029] The following detailed description, in conjunction with the accompanying drawings, will further illustrate the present invention. Detailed Implementation

[0030] To facilitate understanding of the present invention, a more complete description will be given below with reference to the accompanying drawings. Several embodiments of the invention are shown in the drawings. However, the invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

[0031] It should be noted that when a component is said to be "fixed to" another component, it can be directly on the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0032] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the specification of this invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0033] Please see Figures 1 to 12 The present invention provides a rotary high-speed stacking machine, including a rotating disk 10, and a positive electrode hopper 20, a first positive electrode positioning assembly 30, a first stacking assembly 40, a first negative electrode positioning assembly 50, a negative electrode hopper 60, a second negative electrode positioning assembly 70, a second positive electrode positioning assembly 80, and a second stacking assembly 90 arranged circumferentially around the rotating disk 10. A diaphragm unwinding assembly 100 is provided on one side of the first stacking assembly 40 and the second stacking assembly 90. The rotating disk 10 includes a servo motor 11, a swing-type divider 12 connected to the servo motor 11, and a suction cup-type eight-station disk 13 connected to the swing-type divider 12.

[0034] The aforementioned rotary high-speed stacking machine features an eight-station rotary table and dual stacking assembly operating in parallel, achieving a stacking speed of 0.3-0.5 seconds per piece, significantly increasing production capacity. It boasts active unwinding, tension control, overall module alignment correction, and diaphragm static elimination, ensuring diaphragm alignment accuracy of ±0.3mm. Precise electrode positioning guarantees an overall electrode position accuracy of ±0.5mm during stacking, greatly reducing electrode misalignment. The entire process, from electrode loading, stacking, adhesive application to unloading, is fully automated, minimizing manual intervention and ensuring high consistency. The symmetrical open layout of the robotic arm, material box, and secondary positioning mechanisms facilitates convenient and efficient operation, changeover, maintenance, and repair. Dust removal and alignment correction work synergistically to prevent electrode contamination and diaphragm wrinkles, improving yield.

[0035] This machine is suitable for the stacking process of square lithium-ion batteries. It adopts a Z-shaped stacking method. The positive and negative electrode boxes are manually pushed into the stacking machine's hopper (space and mounting holes are reserved for the hardware installation structure of the automatic loading and unloading box function). The separator is automatically corrected by the motor's active unwinding. After passing through the tension mechanism, correction sensor, and ion electrostatic removal device, it is introduced into the stacking table. When the disc picks up the material, it drives the separator to move back and forth on the stacking platform. When the disc picks up the material and places the electrode sheet, the separator covers the previous electrode sheet and moves back and forth. The disc picks up the material and suction cup mechanism takes the positive and negative electrode sheets out of the box respectively. After being accurately positioned by the secondary positioning platform, they are stacked on the stacking table. Four sets of pressing knife mechanisms on the stacking table cross-act to press the electrode sheet stack (completing two battery stacks at the same time). After completion, the cell is removed by the cell transfer mechanism, the separator is cut, and it is transferred to the adhesive application station. The adhesive application station applies adhesive to the side of the battery on the adhesive application platform. The transfer robot picks up the battery on the adhesive application platform and puts it onto the discharge conveyor belt.

[0036] It should also be noted that the swing-type divider 12 can swing up and down, and the two sets of diaphragm unwinding assemblies 100 can be used independently.

[0037] Specifically, the servo motor 11 and the swing-type divider 12 constitute a high-precision intermittent indexing drive system. The servo motor 11 provides precise angular displacement control, which the swing-type divider converts into precise intermittent rotations with buffering, each at 45° intervals. The suction cup-type eight-station disc 13 is the execution carrier of this system. Each station is equipped with a vacuum suction cup for adsorbing the fixture or diaphragm frame carrying the electrode sheet. With each rotation of the disc (45°), the eight stations synchronously switch positions, allowing the corresponding electrode sheet or semi-finished cell to move precisely to the next processing station. Compared with traditional cam dividers, the swing-type divider has less impact during start-up and stop, runs more smoothly, significantly improves indexing and positioning accuracy (up to ±0.05°), and reduces wear during long-term operation, ensuring equipment lifespan and reliability. The eight-station design enables one-to-many material flow, allowing processes such as feeding, positioning, and stacking to be spatially separated and temporally overlapped, greatly improving processing efficiency.

[0038] In one embodiment of the present invention, the positive electrode material hopper 20 includes a first feeding and lifting motor 21, a first material box 22 located above the first feeding and lifting motor 21, a first detection sensor 23 located at the upper edge of the first material box 22, a plurality of distributing brushes 24 located at the edge of the first material box 22, and an ionizing gas bar located at the edge of the first material box. The first feeding and lifting motor 21 gradually lifts the electrode stack in the first material box 22 according to instructions, and the first detection sensor 23 monitors the height of the uppermost electrode in real time to achieve closed-loop control. When the material handling robot picks up the electrode, the ionizing gas bar blows ionized gas to assist in separation, physically separating the electrode that may be stuck together due to static electricity or oil, ensuring that only one electrode is picked up at a time. Specifically, the negative electrode material hopper 60 has a basically the same structure as the positive electrode material hopper 20.

[0039] In one embodiment of the present invention, the first negative electrode positioning assembly 50 includes a negative electrode positioning cylinder 51, four negative electrode positioning blocks 52 connected to the negative electrode positioning cylinder 51, and a negative electrode dust collection device 53 disposed between the four negative electrode positioning blocks 52, and an ultrasonic sensor in the middle of the first negative electrode positioning assembly 50. The second negative electrode positioning assembly 70 is exactly the same as the first negative electrode positioning assembly 50. Specifically, after the material handling robot initially places the electrode into the first negative electrode positioning assembly 50, the negative electrode positioning cylinder 51 drives the four negative electrode positioning blocks 52 to move synchronously from both sides to precisely position the electrode in the XY direction. At the same time, the built-in negative electrode dust collection device 53 is activated to blow and suck away dust and debris from the surface of the electrode during the positioning process. The combination of the material distribution brush 24 and the first detection sensor 23 effectively prevents fatal errors in picking up two or more electrodes. Positioning and dust removal are carried out simultaneously, ensuring the cleanliness of the electrode in the most important alignment stage, reducing the risk of short circuits in the battery cell caused by impurities from the source, and improving safety and yield.

[0040] In one embodiment of the present invention, the first positive electrode positioning assembly 30 includes a positive electrode positioning cylinder 31, four positive electrode positioning blocks 32 connected to the positive electrode positioning cylinder 31, and a positive electrode dust collection device 33 disposed between the four positive electrode positioning blocks 32. An ultrasonic sensor is provided in the middle of the first positive electrode positioning assembly 30. After the material handling robot initially places the electrode sheet into the first positive electrode positioning assembly 30, the positive electrode positioning cylinder 31 drives the four positive electrode positioning blocks 32 to move synchronously from both sides to precisely position the electrode sheet in the XY direction. At the same time, the built-in positive electrode dust collection device 33 is activated to blow and suck away dust and debris from the surface of the electrode sheet during the positioning process. Specifically, it also includes an ultrasonic sensor to prevent multiple positive electrode sheets from being placed on the processing platform.

[0041] In one embodiment of the present invention, the first stacking assembly 40 includes a servo module 41, a stacking platform 42 disposed on the upper end of the servo module 41, and two left-side clamping cylinders 43, two right-side clamping cylinders 44, and an inner and outer displacement cylinder disposed on the stacking platform 42. The servo module 41 drives the stacking platform 42 to perform precise lifting and lowering movements. When the eight-station disc 13 rotates the workpiece carrying the diaphragm to the first stacking assembly 40, the stacking platform 42 rises to receive it. Specifically, for each electrode sheet placed, the stacking platform 42 is lowered by the servo module 41 to ensure that the height of the stacking platform 42 is consistent each time the sheets are stacked. The bottom layer is the separator, which is pressed by the left and right pressing cylinders 43 and 44 in the front row. Then, a positive electrode sheet is placed and pressed by the left and right pressing cylinders 43 and 44 in the rear row. The separator is then swung and placed on top of the positive electrode sheet and pressed by the left and right pressing cylinders 43 and 44 in the front row. Then, a negative electrode sheet is placed and pressed by the left and right pressing cylinders 43 and 44 in the rear row. The separator is then swung and placed on top of the negative electrode sheet and pressed by the left and right pressing cylinders 43 and 44 in the front row. This stacking process is repeated until a certain number of sheets are stacked. The separator is then heat-cut, and the unloading robot removes the battery.

[0042] In one embodiment of the present invention, the diaphragm unwinding assembly 100 includes an unwinding motor 101, a web guiding device 102, a left-right swaying device 103, and a web guiding sensor 104. Specifically, the unwinding motor 101 provides constant tension unwinding. The web guiding device 102 detects and adjusts the lateral position deviation of the diaphragm during travel in real time using an edge sensor. The left-right swaying device 103 moves precisely left and right according to a program during stacking, cooperating with the stacking platform to form a "Z" shaped fold. The web guiding sensor 104 is used to detect the degree of offset of the diaphragm roll.

[0043] It should be noted that the second negative electrode positioning component 70 has the same structure and working principle as the first negative electrode positioning component 50, so it will not be described again here. The second positive electrode positioning component 80 has the same structure and working principle as the first positive electrode positioning component 30, and the second stacking component 90 has the same structure and working principle as the first stacking component 40, so it will not be described again here.

[0044] In one embodiment of the present invention, the rotary high-speed stacking machine further includes a feeding rotary robot assembly 110, which includes a first shifting module 111, a first rotating module 112 and a first clamping device 113, for picking up the battery cell from the stacking platform and placing it on the adhesive application platform.

[0045] In one embodiment of the present invention, an adhesive application platform assembly 120 and an adhesive application mechanism 130 are further included. The adhesive application platform assembly 120 includes a second shifting module 121, a second rotating module 122, and a second clamping device 123 for clamping the battery cells when applying adhesive to the side surfaces of the battery.

[0046] In one embodiment of the present invention, the adhesive application mechanism 130 includes an X-axis module 131, a Y-axis module 132, a tensioning device 133, and an adhesive application head device 134, for applying adhesive to the side of the battery cell.

[0047] In one embodiment of the present invention, a discharge assembly 140 is further included, which includes a stepper motor 141, a discharge conveyor belt 142, and a material picking cylinder.

[0048] Specifically, the unwinding motor 101 provides constant tension unwinding. The web-aligning device 102 detects and adjusts the lateral position deviation of the diaphragm in real time during travel using an edge sensor. The left-right swaying device 103 moves precisely left and right according to a program during stacking, cooperating with the stacking platform to form a "Z" shaped fold. The web-aligning sensor 104 eliminates the high static charge generated by friction on the diaphragm, preventing it from attracting dust or sticking itself. The X-axis module 131 and Y-axis module 132 drive the adhesive applicator 134 to perform planar motion. The tensioning device 133 ensures that the tension of the tape remains constant during peeling and bonding. The adhesive applicator flatly applies the protective tape to the side of the battery cell according to a preset trajectory. After the adhesive is applied, the picking cylinder picks up the battery cell and places it onto the discharge conveyor belt 142. The stepper motor 141 drives the conveyor belt to send the finished battery cell into the buffer bin or to the next assembly process.

[0049] The aforementioned stacking machine operates without manual handling or intervention throughout the entire process, from the completion of bare cell stacking to the final secure application of adhesive and delivery. This achieves a closed-loop process within a single unit. This not only significantly reduces labor costs but also completely avoids quality fluctuations and potential damage caused by manual operation, ensuring the structural stability of the cells in their pouch form.

[0050] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention. Therefore, the scope of protection of this patent should be determined by the appended claims.

Claims

1. A rotary high-speed stacking machine, characterized in that, The device includes a rotating disc and a positive electrode hopper, a first positive electrode positioning assembly, a first stacking assembly, a first negative electrode positioning assembly, a negative electrode hopper, a second negative electrode positioning assembly, a second positive electrode positioning assembly, and a second stacking assembly arranged in sequence around the rotating disc. A diaphragm unwinding assembly is provided on one side of the first stacking assembly and the second stacking assembly. The rotating disc includes a servo motor, a swing-type divider connected to the servo motor, and a suction cup-type eight-station disc connected to the swing-type divider.

2. The rotary high-speed stacking machine according to claim 1, characterized in that, The positive electrode hopper includes a first feeding lifting motor, a first material box located at the upper end of the first feeding lifting motor, a first detection sensor located at the upper edge of the first material box, a plurality of dispensing brushes located at the edge of the first material box, and an ion gas bar located at the edge of the first material box.

3. The rotary high-speed stacking machine according to claim 1, characterized in that, The first negative electrode positioning assembly includes a negative electrode positioning cylinder, four negative electrode positioning blocks connected to the negative electrode positioning cylinder, and a negative electrode dust collection device disposed between the four negative electrode positioning blocks. An ultrasonic sensor is provided in the middle of the first negative electrode positioning assembly.

4. The rotary high-speed stacking machine according to claim 1, characterized in that, The first positive electrode positioning assembly includes a positive electrode positioning cylinder, four positive electrode positioning blocks connected to the positive electrode positioning cylinder, and a positive electrode dust collection device disposed between the four positive electrode positioning blocks. The first positive electrode positioning assembly moves inward and outward when it is in operation.

5. The rotary high-speed stacking machine according to claim 1, characterized in that, The first stacking assembly includes a servo module, a stacking platform located on the upper end of the servo module, two left-side pressing cylinders, two right-side pressing cylinders, and inner and outer displacement cylinders located on the stacking platform.

6. The rotary high-speed stacking machine according to claim 1, characterized in that, The diaphragm unwinding assembly includes an unwinding motor, a correction device, a left-right swaying device, and a correction sensor.

7. The rotary high-speed stacking machine according to claim 1, characterized in that, The rotary high-speed stacking machine also includes a material unloading rotary robot assembly, which includes a first shifting module, a first rotating module, and a first clamping device to pick up the battery cells from the stacking platform and place them on the adhesive application platform.

8. The rotary high-speed stacking machine according to claim 1, characterized in that, It also includes an adhesive application platform assembly and an adhesive application mechanism. The adhesive application platform assembly includes a second shifting module, a second rotating module, and a second clamping device for clamping the battery cells when applying adhesive to the side of the battery.

9. The rotary high-speed stacking machine according to claim 8, characterized in that, The adhesive application mechanism includes an X-axis module, a Y-axis module, a tensioning device, and an adhesive application head device, used for applying adhesive to the sides of the battery cells.

10. The rotary high-speed stacking machine according to claim 1, characterized in that, It also includes a discharge assembly, which further includes a stepper motor, a discharge conveyor belt, and a material handling cylinder.

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