A CCD processing device for lithium battery lamination process

Abstract

The utility model discloses a CCD processing device for a lithium battery lamination process, including a diaphragm unwinding roller, a roller guide assembly, a film pulling assembly and a lamination mechanism, wherein the roller guide assembly includes a front guide roller, a tension mechanism and a rear guide roller arranged in sequence, wherein the front guide roller and the rear guide roller are used for diaphragm guidance, and the tension mechanism is used for adjusting the tightness of the diaphragm; the film pulling assembly includes two adjacent first positioning rollers and two adjacent second positioning rollers, and the diaphragm is positioned between the two first positioning rollers and then enters the two second positioning rollers for positioning. The utility model arranges two CCD cameras, a light source and an infrared sensor, takes pictures of the pole pieces in the positive and negative electrode sheet material areas before the mechanical arm works, and transmits the digital signals to the defect detection and analysis system to judge whether the pole piece has defects and the area of ​​the defects, thereby eliminating the risk of the pole piece being stacked into the stacked core and better ensuring the quality of the product.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium batteries, in particular to a CCD processing device for a lithium battery lamination process. Background Art

[0002] The stacking machine is suitable for the stacking process of square lithium-ion batteries. It adopts a Z-shaped stacking method, and finally forms a multi-layer stacking structure with "diaphragm-positive electrode-diaphragm-negative electrode" as a unit. For lithium-ion batteries, many abnormalities are related to poor control of the Z-type stacking process, such as capacity loss / abnormality, short circuit, abnormal coating of the diaphragm and the negative electrode sheet, and the negative electrode sheet and the positive electrode sheet. The existing stacking machine has three CCD detection systems: the pole piece defect CCD detection system, that is, the computer determines whether it needs to be discharged later by analyzing and calculating the area of ​​defects on the front and back sides of the pole piece; the pole piece size CCD detection system, that is, the computer grabs the measurement edge according to the obvious grayscale difference presented by the different reflective values ​​of the foil and the material area. Various measurement edges can be combined to measure the pole piece size data such as the width and height of the pole ear, so as to discharge the abnormal pole piece; the overhang detection system on the stacking table, that is, by grabbing the required diaphragm edge, negative electrode edge and positive electrode edge to measure the coating of the stacked core. If there is an abnormality, the machine will alarm and discharge the abnormal pole piece. The pole piece defect CCD detection system and the pole piece size CCD detection system are uniformly discharged at the subsequent inverted belt. If the inverted belt has abnormal vacuum absorption or other problems, the abnormal pole piece will not be discharged normally, but will flow to the next stacking process. In this way, even if there is an overhang detection system on the stacking table, only some abnormal pole pieces will be discharged, but some abnormal pole pieces such as large defects in the material area or pole piece folding will be stacked into the stacking core as normal pole pieces, resulting in poor alignment of the pole ears, short circuits, lithium deposition and many other problems. Therefore, a device that can detect large defects in the pole piece material area on the stacking table is needed to ensure the integrity of the stacked pole pieces and reduce unnecessary scrapping. Utility Model Content

[0003] 1. Technical problems to be solved:

[0004] In view of the above technical problems, the utility model provides a CCD processing device for a lithium battery lamination process.

[0005] 2. Technical solution:

[0006] A CCD processing device for a lithium battery lamination process comprises a diaphragm unwinding roller, a roller guide assembly, a film pulling assembly and a lamination mechanism, wherein the roller guide assembly comprises a front guide roller, a tension mechanism and a rear guide roller which are arranged in sequence, wherein the front guide roller and the rear guide roller are used for diaphragm guidance, and the tension mechanism is used for adjusting the tightness of the diaphragm; the film pulling assembly comprises two adjacently arranged first positioning rollers and two adjacently arranged second positioning rollers, wherein the diaphragm is positioned between the two first positioning rollers and then enters the two second positioning rollers for positioning, wherein the second positioning rollers are rotatably connected to a sliding plate, wherein the sliding plate is fixedly connected to a sliding block, wherein the sliding block is slidably connected to a guide rail, and wherein the guide rail It is arranged on a fixed plate, and the sliding plate is connected to a linear drive mechanism; the stacking mechanism includes a stacking platform arranged below the film-pulling assembly, and two sets of knife pressing assemblies are arranged opposite to each other on the stacking platform. When the second positioning clamping roller is located on the left side, the knife pressing assembly on the right side presses the diaphragm onto the stacking platform; when the second positioning clamping roller is located on the right side, the knife pressing assembly on the left side presses the diaphragm onto the stacking platform; a positive electrode sheet material area and a first mechanical arm are arranged on the left side of the stacking platform, and a negative electrode sheet material area and a second mechanical arm are arranged on the right side of the stacking platform; high-frequency CCD cameras for acquiring images of the positive electrode sheet material area and the negative electrode sheet material area are respectively arranged above both sides of the stacking platform, and the high-frequency CCD cameras are connected to the electrode sheet CCD processing system, and light sources are also arranged on both sides of the stacking platform.

[0007] Furthermore, the tension mechanism includes two first guide rollers arranged at the same height, the two first guide rollers are rotatably connected to the base plate, the two base plates are fixed by a connecting rod, the connecting rod is connected to the movable end of the first motor, and a second guide roller and a third guide roller are respectively provided above and below the first guide roller, and the second guide roller and the third guide roller are rotatably connected to the fixed plate.

[0008] Furthermore, the linear drive mechanism includes a driving nut, a screw and a second motor. The driving nut is fixed on the sliding plate. The driving nut is threadedly connected to the screw. The screw is rotatably connected to two supports. The movable end of the second motor is fixedly connected to the screw.

[0009] Furthermore, an infrared sensor is provided on the side of the knife pressing assembly for detecting the movement of the knife pressing assembly and feeding back to the CCD processing system. The CCD processing system controls the high-frequency CCD camera to take pictures after receiving the signal from the infrared sensor.

[0010] 3. Beneficial effects:

[0011] The utility model realizes the left and right swing of the diaphragm relative to the stacking table through a film pulling component, and alternately presses the diaphragm on the stacking table through two sets of pressing knife components on the stacking table, and takes out the positive and negative electrode sheets from the positive and negative electrode sheet material areas through a mechanical arm and stacks them alternately on both sides of the diaphragm to complete the Z-type stacking. By setting two CCD cameras, a light source and an infrared sensor, the electrode sheets in the positive and negative electrode sheet material areas are photographed before the mechanical arm works, and the digital signals are transmitted to the defect detection and analysis system. The defect detection and analysis system selects the position of the electrode sheet through the change of grayscale value before and after the light source is illuminated, and judges whether the electrode sheet has defects and the area of ​​the defects, thereby eliminating the risk of the electrode sheet being stacked into the stacking core, and better ensuring the quality of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the overall structure of the CCD processing device of the lithium battery lamination process of the utility model;

[0013] Figure 2 It is a structural schematic diagram of the tension mechanism of the utility model. DETAILED DESCRIPTION

[0014] The utility model is described in detail below in conjunction with the accompanying drawings.

[0015] As attached Figure 1 To Attachment Figure 2 As shown,

[0016] Specific embodiment: A CCD processing device for a lithium battery lamination process, comprising a diaphragm unwinding roller 1, a roller guide assembly 2, a film pulling assembly 3 and a lamination mechanism 4, wherein the roller guide assembly 2 comprises a front guide roller 2-1, a tension mechanism 2-2 and a rear guide roller 2-3 arranged in sequence, the front guide roller 2-1 and the rear guide roller 2-3 are used for diaphragm guidance, and the tension mechanism 2-2 is used for adjusting the tightness of the diaphragm; the film pulling assembly 3 comprises two adjacently arranged first positioning rollers 3-1 and two adjacently arranged second positioning rollers 3-2, the diaphragm is positioned between the two first positioning rollers 3-1 and then enters the two second positioning rollers 3-2 for positioning, the second positioning rollers 3-2 are rotatably connected to the sliding plate 3-3, the sliding plate 3-3 is fixedly connected to the sliding block, the sliding block is slidably connected to the guide rail 3-4, and the guide rail 3-4 is provided On the fixed plate 5, the sliding plate 3-3 is connected to the linear drive mechanism; the stacking mechanism 4 includes a stacking platform 4-1 arranged below the film pulling assembly 3, and two sets of pressing knife assemblies 4-2 are arranged opposite to each other on the stacking platform 4-1. When the second positioning clamping roller 3-2 is located on the left side, the pressing knife assembly 4-2 on the right side presses the diaphragm onto the stacking platform 4-1; when the second positioning clamping roller 3-2 is located on the right side, the pressing knife assembly 4-2 on the left side presses the diaphragm onto the stacking platform 4-1; a positive electrode sheet area and a first mechanical arm (not shown in the figure) are provided on the left side of the stacking platform 4-1, and a negative electrode sheet area and a second mechanical arm (not shown in the figure) are provided on the right side of the stacking platform 4-1; high-frequency CCD cameras 6 for capturing images of the positive electrode sheet area and the negative electrode sheet area are respectively arranged above both sides of the stacking platform 4-1, and the high-frequency CCD camera 6 is connected to the electrode CCD processing system; light sources 7 are also provided on both sides of the stacking platform 4-1.

[0017] The tension mechanism 2-2 includes two first guide rollers 2-21 arranged at the same height. The two first guide rollers 2-21 are rotatably connected to the base plate 2-22. The two base plates 2-22 are fixed by a connecting rod 2-23. The connecting rod 2-23 is connected to the movable end of the first motor. A second guide roller 2-24 and a third guide roller 2-25 are respectively arranged above and below the first guide roller 2-21. The second guide roller and the third guide roller are rotatably connected to the fixed plate 5.

[0018] The linear drive mechanism includes a drive nut 8, a screw 9 and a second motor 10. The drive nut 8 is fixed on the sliding plate 3-3. The drive nut 8 is threadedly connected to the screw 9. The screw 9 is rotatably connected to two supports 11. The movable end of the second motor 10 is fixedly connected to the screw 9.

[0019] An infrared sensor 10 is provided on the side of the knife pressing assembly 4-2 for detecting the movement of the knife pressing assembly 4-2 and feeding back to the CCD processing system. After receiving the signal from the infrared sensor, the CCD processing system controls the high-frequency CCD camera 6 to take a snapshot.

[0020] When the lithium battery stacking device of the utility model is working, the diaphragm unwinding roller 1 retracts and unwinds the diaphragm, and the diaphragm enters the two first positioning rollers 3-1 for positioning after passing through the front guide roller 2-1, the tension mechanism 2-2 and the rear guide roller 2-3, and then enters the two second positioning rollers 3-2. The two second positioning rollers 3-2 are driven to move left and right by the linear drive mechanism, thereby swinging the diaphragm above the stacking platform left and right. Specifically, when the second positioning roller 3-2 is located on the right side ( Figure 1 state), at this time, the knife pressing assembly 4-2 on the right presses the diaphragm downwards onto the stacking table 4-1, and the action of the knife pressing assembly is sensed by the infrared sensor. The high-frequency CCD camera on the left takes a picture of the positive electrode sheet area, and the CCD processing system determines whether the positive electrode sheet to be taken has defects. When the feedback is that there are no defects, the first mechanical arm on the left takes the positive electrode sheet from the positive electrode sheet area and performs the stacking operation. If there are defects, the defective positive electrode sheet is automatically excluded, and the next positive electrode sheet is photographed repeatedly to determine whether there are defects until the next positive electrode sheet is qualified. When the left positive electrode sheet is stacked, the right pressure knife assembly 4-2 remains in a pressed state, the left pressure knife assembly 4-2 is released, and the linear drive mechanism drives the two second positioning rollers 3-2 to move to the left. When the diaphragm is loose, it is adjusted by the tension mechanism. When it reaches a certain position on the left, the left pressure knife assembly 4-2 presses the diaphragm on the stacking table, and the left infrared sensor senses the action of the left pressure knife assembly. The high-frequency CCD camera on the right takes pictures of the negative electrode sheet area. The CCD processing system determines whether the negative electrode sheet to be taken has defects. When there is no defect, the second mechanical arm on the right takes out the negative electrode sheet from the negative electrode sheet area and performs the stacking operation. If there is a defect, the defective negative electrode sheet is automatically excluded, and the next negative electrode sheet is repeatedly photographed and judged whether there is a defect until the next negative electrode sheet is qualified. The second mechanical arm completes the stacking work and repeats the above action to perform Z-type stacking. By repeatedly taking pictures and sampling with two high-frequency CCD cameras, defective positive and negative electrode sheets can be prevented from being stacked into the stacking core. This detection process is added on the basis of the existing technology and solves the technical problems found in the actual production process.

[0021] Although the present invention has been disclosed as above in terms of preferred embodiments, they are not intended to limit the present invention. Anyone skilled in the art can make various changes or modifications without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be based on the scope of protection defined by the claims of this application.

Claims

1. A CCD processing device for a lithium battery lamination process, characterized in that: It includes a diaphragm unwinding roller, a roller guide assembly, a film pulling assembly and a laminating mechanism, the roller guide assembly includes a front guide roller, a tension mechanism and a rear guide roller which are arranged in sequence, the front guide roller and the rear guide roller are used for diaphragm guidance, the tension mechanism is used for adjusting the tightness of the diaphragm; the film pulling assembly includes two adjacently arranged first positioning clamping rollers and two adjacently arranged second positioning clamping rollers, the diaphragm is positioned between the two first positioning clamping rollers and then enters the two second positioning clamping rollers for positioning, the second positioning clamping rollers are rotatably connected to a sliding plate, the sliding plate is fixedly connected to a sliding block, the sliding block is slidably connected to a guide rail, the guide rail is arranged on a fixed plate, and ... The moving plate is connected to the linear drive mechanism; the stacking mechanism includes a stacking platform arranged below the film pulling assembly, and two sets of pressing knife assemblies are arranged opposite to each other on the stacking platform. When the second positioning clamping roller is located on the left side, the pressing knife assembly on the right side presses the diaphragm onto the stacking platform; when the second positioning clamping roller is located on the right side, the pressing knife assembly on the left side presses the diaphragm onto the stacking platform. A positive electrode sheet material area and a first mechanical arm are arranged on the left side of the stacking platform, and a negative electrode sheet material area and a second mechanical arm are arranged on the right side of the stacking platform. High-frequency CCD cameras for acquiring images of the positive electrode sheet material area and the negative electrode sheet material area are respectively arranged above both sides of the stacking platform, and the high-frequency CCD cameras are connected to the electrode sheet CCD processing system. Light sources are also arranged on both sides of the stacking platform.

2. A CCD processing device for a lithium battery lamination process according to claim 1, characterized in that: The tension mechanism includes two first guide rollers arranged at the same height, the two first guide rollers are rotatably connected to the base plate, the two base plates are fixed by a connecting rod, the connecting rod is connected to the movable end of the first motor, and a second guide roller and a third guide roller are respectively arranged above and below the first guide roller, and the second guide roller and the third guide roller are rotatably connected to the fixed plate.

3. A CCD processing device for a lithium battery lamination process according to claim 1 or 2, characterized in that: The linear drive mechanism comprises a driving nut, a screw rod and a second motor. The driving nut is fixed on the sliding plate. The driving nut is threadedly connected to the screw rod. The screw rod is rotatably connected to two supports. The movable end of the second motor is fixedly connected to the screw rod.

4. A CCD processing device for a lithium battery lamination process according to claim 3, characterized in that: An infrared sensor is arranged on the side of the knife pressing assembly to detect the movement of the knife pressing assembly and provide feedback to the CCD processing system. The CCD processing system controls the high-frequency CCD camera to take snapshots after receiving the signal from the infrared sensor.

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