Lithium battery aluminum foil coating processing production line

Abstract

The invention discloses a lithium battery aluminum foil coating processing production line, which relates to the field of lithium battery processing and comprises an unwinding machine, a coating machine, a detection and correction all-in-one machine, a winding machine and a control device which are sequentially arranged from upstream to downstream, according to the device, the detection mechanism needing to be adjusted in the X direction and the Y direction in the opposite side detection device is combined with the mechanism capable of moving in the X direction and the Y direction in the feeding correction device, input of extra power devices and electric power is omitted, the two opposite side detection devices are arranged on the front side of the unfolding mechanism, the fault type is judged more strictly, and the fault detection efficiency is improved. The carbon-coated aluminum foil processed by the invention is high in yield, good in product consistency, low in technical requirement on coating equipment, small in occupied area, relatively low in equipment manufacturing cost and energy-saving, and has remarkable technical progress in the field.

Description

Technical Field

[0001] The present invention relates to the field of lithium battery processing, and in particular to a lithium battery aluminum foil coating processing production line. Background Art

[0002] Carbon-coated foil is mainly used in the field of batteries, especially in lithium-ion batteries with high energy density silicon-based negative electrodes. The coverage rate of the carbon-coated layer on the surface of the carbon-coated foil is extremely high. At present, the quality inspection method mainly used for the coverage rate of the carbon-coated layer on the surface of the carbon-coated foil in the printing production of domestic carbon-coated foil is to conduct sampling inspection after printing or not to monitor it at all, and only to conduct inspection when new products are promoted. The printing production of carbon-coated foil is usually continuous production with a high printing speed, a production volume of tens of thousands of meters per day, and a single roll length in kilometers. The first and last pieces of conventional inspection only take a section of finished foil before the start of the machine and after the printing is completed. In the actual printing process, only the human eye is used to measure and inspect the printing appearance, such as: wrinkles on the substrate roller, printing leakage, printing size, etc., and it is impossible to monitor the printing coverage rate of the carbon-coated foil. Simply analyzing from the printing quality, the monitoring strength of the printing effect monitoring by manual inspection is not enough. The inspection time is relatively long during the actual production process and it is impossible to monitor the whole process. At the same time, the printing coverage rate of the actual foil cannot be monitored.

[0003] Application No. CN201920760900.4 proposes an online appearance image detection device for carbon-coated foil printing, which uses CCD cameras located on the upper and lower sides of the foil to detect defects on both sides of the carbon coating. However, the device cannot detect other faults caused by the carbon-coated aluminum foil during the transportation process.

[0004] Application No. CN201320089961.5 proposes an automatic edge alignment and correction device for lithium battery roller pressing, which uses a photoelectric sensor to align the foil being conveyed, and then adjusts the rear receiving roller for correction. However, it can only detect and process the offset of the foil, and cannot detect and process other abnormal conditions such as wrinkles, missing edges, and warping of the foil.

[0005] To solve the above problems, our company has developed a lithium battery aluminum foil carbon-coated CCD edge detection device for detecting conveying faults, and a lithium battery foil feeding correction device for correcting faults. However, in actual use, the following defects still exist: 1. Since the two devices are two sets of equipment, they occupy a large area and are far apart. After the front CCD edge detection device detects a fault, the correction time point and position of the lithium battery foil feeding correction device calculated by using the distance between the two and the feeding speed are inevitably biased; 2. Also, because the two are two sets of equipment, more positioning devices will be used to realize the movement of the detection mechanism and the correction mechanism, which will increase the cost and increase the possibility of system errors; 3. The lithium battery foil feeding correction device uses two large-diameter flattening rollers, one in front and one in the back, to unfold the wrinkled foil. It must use a lifting mechanism to lower the flattening rollers when unfolding is needed and then raise them for standby. It not only consumes electricity, but also has a large static friction force, which may cause the foil to break; 4. The lithium battery aluminum foil carbon coated CCD edge detection device is prone to false alarms due to mechanical jitter, jump and other unexpected conditions. Summary of the invention

[0006] In order to solve the above problems existing in the existing production line at one time in the lithium battery aluminum foil coating process, the present invention proposes a lithium battery aluminum foil coating process production line, comprising: an unwinder, a coating machine, a detection and correction integrated machine, a winding machine, and a control device connected and controlled by the above devices, which are arranged in sequence from upstream to downstream; the detection and correction integrated machine comprises: a processing platform, a guide roller A and a guide roller B are arranged at the front end of the processing platform, and a guide roller C is arranged at the rear end, wherein the bottoms of the guide rollers B and C are tangent to the upper surface of the processing platform; a through groove perpendicular to the feeding direction is arranged on the upstream side of the processing platform, and a telescopic device is arranged at each end of the through groove, each telescopic device drives a slider A to slide in the through groove, and a backlight is arranged on the side of the slider A close to the edge of the processing platform, and two plug-in edge detection components are arranged on the side close to the center line of the processing platform, one of which is close to the upstream and the other is close to the downstream; a gantry is arranged in the middle section of the processing platform, and an inverted T-shaped frame is arranged on each side of the crossbeam of the gantry, and a motor A is arranged at each end of the lower part of one of the T-shaped frames, and each motor A drives an unfolding roller group The other end of the roll group is movably connected to the two ends of the lower part of the T-shaped frame on the other side of the gantry; the gantry is also provided with a pair of connecting rods extending upstream on the inner side of the two T-shaped frames, and each pair of connecting rods is fixed with an X-axis guide rail; the upper end of the Y-axis guide rail slides and positions in the X-axis guide rail, and the trimming correction mechanism is fixed on the clamping claw, and the clamping claw slides up and down and positions in the Y-axis guide rail; a detection mechanism mounting plate is fixed on one side of the trimming correction mechanism, and four plug-in edge detection components are installed at the bottom of the detection mechanism mounting plate, which can be made to The two plug-in edge detection components are located directly above the two plug-in edge detection components on the slider A, and form a one-to-one corresponding relationship. At the same time, the other two plug-in edge detection components on the detection mechanism mounting plate are located directly above the backlight. The processing platform is also provided with two opposing photoelectric switches, which are arranged in an upstream and downstream relationship, and the line connecting one of them and the plug-in edge detection component on the slider A near the upstream is perpendicular to the feeding direction, and the line connecting the other plug-in edge detection component on the slider A near the downstream is also perpendicular to the feeding direction.

[0007] Preferably, the plug-in edge detection assembly comprises: a columnar main body, a socket is provided at the bottom of the main body for docking with the plug on the slider A or the detection mechanism mounting plate, a CCD camera is provided at the top of the main body for receiving light intensity information and converting it into an electrical signal, an oblique spotlight is provided on one side of the upper part of the main body for illuminating the carbonized area and blank area of ​​the aluminum foil above or below the adjacent plug-in edge detection assembly, and the power supply line and signal line of the CCD camera and the spotlight are electrically connected to the socket from the inner side of the main body; the plug-in edge detection assembly may also include: a columnar main body, a socket is provided at the bottom of the main body for docking with the plug on the slider A or the detection mechanism mounting plate, a CCD camera is provided at the top of the main body for receiving light intensity information and converting it into an electrical signal, a square table is provided at the outer periphery of the CCD camera on the upper part of the main body, and a ring-shaped LED light strip is provided on the top of the square table and the outer circle of the CCD camera, and the top of the LED light strip is tilted inwardly to facilitate the light to illuminate the carbonized area and blank area of ​​the aluminum foil directly above or below the CCD camera.

[0008] Preferably, the telescopic device includes: a motor B, the shaft end of the motor B drives the screw to rotate, the screw passes through the through hole on the slider A and is movably connected to the baffle, the screw nut is sleeved on the outside of the screw and is fixed to one end of the slider A by a bolt; a groove is provided on the side of the slider A away from the motor B, two plugs are provided in the groove according to the upstream and downstream directions, and the bottoms of two plug-in opposite edge detection components are inserted into the two plugs to achieve installation; a socket A is provided on the side of the slider A close to the motor B, and the socket A and the plug are electrically connected through the internal wiring of the slider A; a socket B is provided on the inner wall of the through groove, and a socket C is provided on the side of the processing platform, socket B is electrically connected to socket C, socket A and socket B are electrically connected through pluggable wires, and socket C is electrically connected to the control device.

[0009] Preferably, the unfolding roller group includes: mounting plates arranged at both ends, three adjacent support rods with an angle of 120° are arranged on the outer circumference of the mounting plates, the shaft of the mounting plates is fixed to the rotating shaft of the motor A or is movably connected to the two ends of the T-shaped frame; a flattening roller is fixed to one end of the shaft of the support rod far from the mounting plate, the flattening roller itself does not rotate, and a 1-2 cm thick rubber layer is arranged on the outside of the flattening roller, when the flattening roller rotates to the lowest point, the rubber layer is squeezed by the processing platform, so that the thickness of the squeezed part is reduced by 0.5-1 cm; the two motors A are both stepping motors, and the rotation directions are opposite when working.

[0010] Preferably, the transmitting end and the receiving end of the opposing-beam photoelectric switch are both arranged on the top of the motor B, and the laser emitted by it is tangent to the upper surface of the processing platform.

[0011] Preferably, the four plug-in edge detection components installed at the bottom of the detection mechanism mounting plate are divided into two groups, upstream and downstream, with two in each group, wherein the two upstream plug-in edge detection components and the transmitting end and the receiving end of the upstream opposing photoelectric switch, and the upstream plug-in edge detection component on the slider A are in plane A; the two downstream plug-in edge detection components and the transmitting end and the receiving end of the downstream opposing photoelectric switch, and the downstream plug-in edge detection component on the slider A are in plane B, and plane A and plane B are parallel and plane A and plane B are perpendicular to the feeding direction.

[0012] Preferably, a strip-shaped notch is provided at the front end of the processing platform, a guide roller A is installed in the notch, a guide roller B is installed on the downstream side of the notch, and the top of the guide roller A is higher than the bottom of the guide roller B.

[0013] Preferably, the processing platform is further provided with a friction layer below the unfolding roller set, the friction layer is made of rubber material, and the friction layer is embedded, and its upper surface is at the same level as the upper surface of the processing platform.

[0014] Preferably, the control device receives information from the plug-in edge detection component and the beam photoelectric switch, and analyzes the feedback information to issue corresponding control instructions to the unwinder, the coating machine, the integrated detection and correction machine, and the winder. All detection devices in plane A are regarded as a set of edge detection devices, and all detection devices in plane B are regarded as a set of edge detection devices. The control device judges the fault as follows: a. Within 0.5s-1s after the edge detection device in plane A detects the fault code, the edge detection device in plane B detects normal, and the control device determines that the operation is normal; b. Within 0.5s-1s after the edge detection device in plane A detects the fault code, the detection result of the edge detection device in plane B is the same as the former, and the control device determines that the edge detection device in plane A detects the fault code; c. Within 0.5s-1s after the edge detection device in plane A detects the fault code, the detection result of the edge detection device in plane B is different from the previous one and is abnormal. The control equipment controls the production line to stop and manual inspection is carried out to determine the specific fault.

[0015] In the lithium battery aluminum foil coating processing production line of the present invention, a set of edge detection devices in plane A or plane B is used to perform edge detection on the carbon-coated aluminum foil, including the following steps: S1. Use light to illuminate the edge of the carbonized area of ​​the aluminum foil being transported from the upper and lower sides, and set a certain point in the irradiated area as a collection point. Use CCD detection equipment to monitor the voltage generated by the pixels excited by the reflection of the collection point from the upper and lower sides of the aluminum foil. The collection point is set to include half of the carbonized area and half of the blank area when the aluminum foil is normally transported and coated; At the same time, light is irradiated upward from the lower side of the edge line of the aluminum foil being transported, and a certain point in the irradiated area is set as a collection point. A CCD detection device set closely to the above-mentioned CCD detection device is used to monitor the voltage generated by the pixel excited by the backlight at the collection point from the upper side of the aluminum foil. The collection point is set to include half of the aluminum foil shielding area and half of the backlight area when the aluminum foil is normally transported, and the line connecting the two collection points on the upper surface of the aluminum foil is perpendicular to the conveying direction of the aluminum foil; At the same time, the transmitter and receiver of the opposing photoelectric switch are placed on both sides of the aluminum foil. The laser beam emitted by the transmitter is tangent to the upper surface of the aluminum foil. The laser beam is perpendicular to the conveying direction of the aluminum foil and is directly above the collection point. The position of the CCD detection equipment and the opposing photoelectric switch is set to synchronize the monitoring results. S2. The monitoring information of CCD detection equipment and the beam photoelectric switch is transmitted to the control equipment, which analyzes the running status and coating quality of the aluminum foil conveying according to the detection information, issues warnings and controls the operation of subsequent correction and deviation correction equipment.

[0016] Preferably, in step S2, the control device analyzes the running status and coating quality of the aluminum foil conveying according to the aluminum foil detection information, including the following steps: A1. Take a section of normally coated aluminum foil and let it pass through the collection point in time t. Monitor and record the voltage values ​​fed back by each CCD detection device. The interval between the maximum and minimum voltage values ​​in time t is taken as the normal value. The control device assigns a value of 0. If the voltage is less than the normal value and lasts for more than 0.1s, it is assigned a value of 1. If the voltage is greater than the normal value and lasts for more than 0.1s, it is assigned a value of 2. The assigned values ​​of the three CCD detection devices in plane A or plane B are used as the first, second, and third check bits respectively. If the receiver receives light, it is set to 0, and if it does not receive light, it is set to 1. The assigned value of the receiver is used as the fourth check bit. A2. The control device determines the operating status of the coating system according to the check bit generated in step A1. The determination method is as follows: 0000: Carbon coating is normal and transportation is normal; 0001: Carbon coating is normal, and the aluminum foil surface has arches or wrinkles; 0010: Carbon coating is normal, and there is lateral bulge on the edge of the aluminum foil; 0020: Carbon coating is normal, and there is a gap on the aluminum foil surface; 1000, 0100, 1100: There is too much carbon coating in the carbon coating area and the transportation is normal; 1010, 0110, 1110: The carbonized area is over-coated and the edge of the aluminum foil has lateral protrusions; 1020, 0120, 1120: There is too much coating in the carbonized area and there are gaps on the edge of the aluminum foil; 1001, 0101, 1101: The carbonized area is over-coated and the aluminum foil surface is arched or wrinkled; 2000, 0200, 2200: less carbonization in the carbonized area and normal transportation; 2010, 0210, 2210: less carbonized area and lateral bulges on the edge of the aluminum foil; 2020, 0220, 2220: The carbonized area is less coated and there is a gap on the edge of the aluminum foil; 2001, 0201, 2201: The carbonized area is less coated, and the aluminum foil surface is arched or wrinkled; 2100, 1200: One side of the carbonized area is less coated and the other side is more coated, and the transportation is normal; 2110, 1210: The carbonized area has less coating on one side and more coating on the other side, and the edge of the aluminum foil has lateral protrusions; 2100, 1200: The carbonized area has less coating on one side and more coating on the other side, and there is a gap on the edge of the aluminum foil; 2101, 1201: The carbonized area has less coating on one side and more coating on the other side, and the aluminum foil surface has arches or wrinkles; 1110, 2220: The aluminum foil conveying is offset; The last two digits are 11 and 21: one side of the aluminum foil is lifted or bent, and if there is an abnormality in the carbonized area, it is not certain whether the specific factor causing the abnormal carbonization is due to offset or the aluminum foil is not in the same plane, so manual inspection and analysis is required.

[0017] The control device control detection and correction integrated machine has the following working modes when correcting feeding failures: 1. Dealing with wrinkles and folds: The trimming and correction mechanism installed in the Y-axis guide rail is in the initial retracted state, located above the foil. The two motors A are turned on to drive the two unfolding rollers to rotate in opposite directions to simulate the operation of flattening the foil from both sides of the crease by hand. To achieve this operation, the linear speed of the downstream roller group must be greater than the foil feeding speed, and the linear speed of the upstream roller group should be low enough to establish reverse tension. After a short period of flattening by the two roller groups in reverse operation, the motor A drives the unfolding roller group to rotate to an angle where the flattening rollers are not in contact with the processing platform, thus achieving separation, eliminating the need for additional lifting devices; 2. Dealing with excess carbon coating: The Y-axis guide rail installed in the X-axis guide rail is adjusted to a matching position according to the width of the carbon coating area of ​​the foil, and only one or both sides of the trimming and correction mechanism are lowered, and the exhaust fan connected to the trimming and correction mechanism on that side is turned on, and the excess carbon coating is scraped off and sucked away with its scraper, and then the exhaust fan is turned off and the trimming and correction mechanism is folded to complete the operation; 3. Dealing with missing carbon coating: The Y-axis guide rail will retract the trimming correction mechanism to the preset height, and the Y-axis guide rail in the X-axis guide rail is adjusted to a matching position according to the width of the carbon-coated area of ​​the foil. Only one or both sides of the trimming correction mechanism are lowered, and the hot air blower and nozzle connected to the trimming correction mechanism on that side are turned on. After coating and drying, stop spraying and turn off the hot air blower, and retract the trimming correction mechanism to complete the operation.

[0018] The present invention combines the detection mechanism that needs to be adjusted in the X and Y directions in the edge detection device with the moving mechanism that can be moved in the X and Y directions in the feeding correction device, thereby eliminating the need for additional power devices and electricity, and two sets of edge detection devices are arranged on the front side of the unfolding mechanism to more rigorously judge the fault type and filter out the false alarm of the fault. At the same time, the present invention adopts a new unfolding mechanism in view of the need for a lifting mechanism in the existing correction mechanism to realize the contact and separation between the unfolding mechanism and the processing platform, namely, three flattening rollers installed on the support rods of the mounting plate with an angle of 120° to each other, and the flattening roller is only rotated to the bottom. When the end is pulled up and down, its bottom contacts the processing platform, and the rubber layer on its surface is squeezed, forming a static friction force on the aluminum foil to achieve flattening. This design reduces power consumption and cost investment, and the static friction during the flattening operation will not cause potential damage to the aluminum foil. Compared with the existing equipment, the detection result of the present invention is more accurate, and it is convenient to cooperate with the feeding correction device to realize the automatic error correction of the aluminum foil carbon coating processing. The carbon-coated aluminum foil processed by the present invention has a high yield rate, good product consistency, and low technical requirements for the coating equipment. In addition, it occupies a small area, has a low equipment cost, and saves energy, which is a significant technical progress in this field. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A three-dimensional image of the integrated machine for inspection and calibration.

[0020] Figure 2 Schematic diagram of the detection mechanism installation plate.

[0021] Figure 3 The front view of the integrated machine for inspection and calibration.

[0022] Figure 4 The top view of the all-in-one machine for inspection and calibration.

[0023] Figure 5 It is a three-dimensional diagram of the telescopic device.

[0024] Figure 6 It is a three-dimensional diagram of the unfolded roller set.

[0025] Figure 7 The present invention is a stereoscopic diagram of a plug-in type edge detection component.

[0026] Figure 8 The figure is a front view of a plug-in edge detection component.

[0027] Fig. 9 It is a schematic diagram of the structure of the present invention.

[0028] In the figure: 1. Processing platform; 2. Gantry; 3. Notch; 4. Through slot; 5. Guide roller A; 6. Guide roller B; 7. Motor B; 8. Opposed photoelectric switch; 9. Socket C; 10. Screw; 11. Slider A; 12. Backlight; 13. Baffle; 14. Plug-in edge detection assembly; 15. Detection mechanism mounting plate; 16. Socket B; 17. Trimming correction mechanism; 18. Gripper; 19. Y-axis guide rail; 20 , X-axis guide rail; 21. Connecting rod; 22. T-shaped frame; 23. Motor A; 24. Flattening roller; 25. Guide roller C; 26. CCD camera; 27. Spotlight; 28. Support rod; 29. ​​Groove; 30. Screw nut; 31. Socket A; 32. Square table; 33. LED light strip; 34. Socket; 35. Unwinder; 36. Coating machine; 37. Control equipment; 38. All-in-one detection and correction machine; 39. Winder. DETAILED DESCRIPTION

[0029] Embodiment 1, as Figure 1-Figure 9As shown, the lithium battery aluminum foil coating processing production line of the present invention includes: an unwinder 35, a coating machine 36, a detection and correction integrated machine 38, a winder 39, and a control device 37 connected to and controlling the above-mentioned devices, which are arranged in sequence from upstream to downstream. In the following azimuth description, upstream refers to the direction close to the unwinder 35, and downstream refers to the direction close to the winder 39; the detection and correction integrated machine 38 includes: a processing platform 1, the front end of the processing platform 1 is provided with a guide roller A5 and a guide roller B6, and the rear end is provided with a guide roller C25, wherein the bottom of the guide roller B6 and the guide roller C25 are tangent to the upper surface of the processing platform 1, which can ensure that the aluminum foil is attached to the upper surface of the processing platform 1 and travels; the upstream side of the processing platform 1 is provided with a guide roller perpendicular to the feeding direction A through slot 4 is provided at each end of the through slot 4, and a telescopic device is provided at each end of the through slot 4. Each telescopic device drives a slider A11 to slide in the through slot 4. A backlight 12 is provided on the slider A11 on the side close to the edge of the processing platform 1, and two plug-in edge detection components 14 are provided on the side close to the center line of the processing platform 1, one of which is close to the upstream, and the other is close to the downstream. This design allows the plug-in edge detection component 14 to adjust the X-axis position according to the width of the aluminum foil and the width of the carbonized area to ensure that the backlight 12 is below the edge of the aluminum foil and the plug-in edge detection component 14 is below the carbonized edge, so that edge detection can be performed. In this case, the X-axis refers to the axis horizontally and perpendicular to the feeding direction, and the Y The axial direction refers to the axial direction perpendicular to the upper surface of the processing platform 1; a gantry 2 is provided in the middle section of the processing platform 1, and an inverted T-shaped frame 22 is provided on each side of the crossbeam of the gantry 2, wherein a motor A23 is installed at each end of the lower part of one of the T-shaped frames 22, and each motor A23 drives an unfolding roller group to rotate, and the other end of the unfolding roller group is movably connected to the lower ends of the T-shaped frame 22 on the other side of the gantry 2. In this example, the movable connection adopts a bearing connection to reduce wear; the gantry 2 is also provided with a pair of connecting rods 21 extending upstream on the inner side of the two T-shaped frames 22, and each pair of connecting rods 21 is fixed with an X-axis guide rail 20; the upper end of the Y-axis guide rail 19 slides and is positioned in the X-axis guide rail 20, that is, it is fixed under the slider B of the X-axis guide rail 20 The trimming and correction mechanism 17 is fixed on the clamping jaw 18, and the clamping jaw 18 slides up and down and is positioned in the Y-axis guide rail 19, that is, the clamping jaw 18 is fixed on the slider C of the Y-axis guide rail 19; a detection mechanism mounting plate 15 is fixed on one side of the trimming and correction mechanism 17, and four plug-in edge detection components 14 are installed at the bottom of the detection mechanism mounting plate 15. After adjusting the horizontal position, that is, adjusting the position of the X-axis guide rail 20, two of the plug-in edge detection components 14 can be located directly above the two plug-in edge detection components 14 on the slider A11, and form a one-to-one corresponding relationship. At the same time, the other two plug-in edge detection components 14 of the detection mechanism mounting plate 15 are located directly above the backlight 12, which are used to detect the edge of the aluminum foil;The processing platform 1 is also provided with two opposite-beam photoelectric switches 8, which are arranged in an upstream and downstream relationship, and the line connecting one of them with the plug-in type edge detection component 14 on the slider A11 near the upstream is perpendicular to the feeding direction, and the line connecting the other with the plug-in type edge detection component 14 on the slider A11 near the downstream is also perpendicular to the feeding direction. ;

[0030] Embodiment 2, the plug-in type edge detection assembly 14 of the present invention comprises: Figure 2 As shown in , it has a columnar main body, a socket 34 is provided at the bottom of the main body for docking with the plug on the slider A11 or the detection mechanism mounting plate 15, a CCD camera 26 is provided on the top of the main body for receiving light intensity information and converting it into an electrical signal, and an oblique spotlight 27 is provided on one side of the upper part of the main body for illuminating the aluminum foil carbonized area and the blank area above or below the adjacent plug-in edge detection component 14. The power supply line and signal line of the CCD camera 26 and the spotlight 27 are electrically connected to the socket 34 from the inside of the main body. Of course, in order to save space, the spotlight 27 may not protrude from the surface of the main body; the plug-in edge detection component 14 may also include: Figure 7 , Figure 8 As shown, it has a columnar body, a socket 34 is provided at the bottom of the body for docking with the plug on the slider A11 or the detection mechanism mounting plate 15, a CCD camera 26 for receiving light intensity information and converting it into an electrical signal is provided at the top of the body, a square table 32 is provided at the outer periphery of the CCD camera 26 at the upper part of the body, a ring-shaped LED light strip 33 is provided at the top of the square table 32, and a ring-shaped LED light strip 33 is provided at the outer circle of the CCD camera 26, and the top of the LED light strip 33 is tilted inwardly, and the square table 32 is provided to facilitate the inward tilting and gathering of the irradiation direction of the surrounding light strip, so that the light can illuminate the carbonized area and the blank area of ​​the aluminum foil directly above or below the CCD camera 26. Figure 7 , Figure 8 Since the solution shown illuminates directly above or below, the irradiation position will not deviate when the Y-axis guide rail 19 adjusts the height of the detection mechanism mounting plate 15.

[0031] Embodiment 3, as Figure 1 , Figure 5As shown, the telescopic device of the present invention includes: a motor B7, the shaft end of the motor B7 drives the screw 10 to rotate, the screw 10 passes through the through hole on the slider A11, and is movably connected with the baffle 13, the screw nut 30 is sleeved on the outside of the screw 10, and is fixed to one end of the slider A11 by bolts; a groove 29 is provided on the side of the slider A11 away from the motor B7, and two plugs are provided in the groove 29 according to the upstream and downstream directions, and the bottoms of the two plug-in side detection components 14 are inserted into the two plugs to realize installation; the slider A11 close to the motor B7 is provided with a groove 29, and the two plugs are inserted into the bottoms of the two plugs to realize installation. A socket A31 is provided on one side of 7, and the socket A31 and the plug are electrically connected through the internal wiring of the slider A11; a socket B16 is provided on the inner wall of the through groove 4, and a socket C9 is provided on the side of the processing platform 1, the socket B16 is electrically connected to the socket C9, the socket A31 and the socket B16 are electrically connected through a pluggable wire, and the socket C9 is electrically connected to the control device 37, forming a control path through the control device 37, the socket C9, the socket B, the socket A31, the plug, and the plug-in edge detection component 14, which reduces the exposed wires and is more beautiful and safe.

[0032] Embodiment 4, as Figure 1 , Figure 3 , Figure 4 As shown, the unfolding roller group of the present invention includes: mounting plates arranged at both ends, the outer circumference of the mounting plates is provided with three adjacent support rods 28 with an angle of 120°, the shaft of the mounting plates is fixed to the rotating shaft of the motor A23 or is movably connected to the two ends of the T-shaped frame 22; a flattening roller 24 is fixed to one end of the shaft of the support rod 28 far from the mounting plate, the flattening roller 24 itself does not rotate, and a 1-2 cm thick rubber layer is provided on the outer side of the flattening roller 24, when the flattening roller 24 rotates to the lowest point, the rubber layer is squeezed by the processing platform 1, so that the thickness of the squeezed part is reduced by 0.5-1 cm; the two motors A23 are both stepping motors, and the rotation directions are opposite when working.

[0033] In Example 5, the transmitting end and the receiving end of the opposing photoelectric switch 8 are both arranged on the top of the motor B7, and the laser emitted by it is tangent to the upper surface of the processing platform 1.

[0034] In Example 6, the four plug-in edge detection components 14 installed at the bottom of the detection mechanism mounting plate 15 are divided into two groups, upstream and downstream, with two in each group. The two plug-in edge detection components 14 located upstream and the transmitting end and receiving end of the upstream photoelectric switch 8, as well as the plug-in edge detection components 14 located upstream on the slider A11 are in plane A, which is equivalent to the coplanarity of the five points; the two plug-in edge detection components 14 located downstream and the transmitting end and receiving end of the downstream photoelectric switch 8, as well as the plug-in edge detection components 14 located upstream on the slider A11 are in plane A, which is equivalent to the coplanarity of the five points. The downstream plug-in edge detection component 14 is in plane B, which is equivalent to five points being coplanar. Plane A and plane B are parallel and both plane A and plane B are perpendicular to the feeding direction, so as to form two sets of edge detection devices to filter out the judgment errors caused by mechanical accidents of a single set of edge detection devices. In actual applications, if the distance between plane A and plane B is too close, there will be almost no deviation in the judgment results of the two. If the distance is too far, it will affect the positioning of the defect position by the correction mechanism. In this example, the distance between plane A and plane B is set to 30 cm, which can achieve better results.

[0035] In Example 7, a strip-shaped notch 3 is provided at the front end of the processing platform 1, a guide roller A5 is installed in the notch 3, and a guide roller B6 is installed on the downstream side of the notch 3, and the top of the guide roller A5 is higher than the bottom of the guide roller B6.

[0036] In Example 8, the processing platform 1 is further provided with a friction layer below the unfolding roller group. The friction layer is made of rubber material and is embedded. The upper surface of the friction layer is in the same horizontal plane as the upper surface of the processing platform 1.

[0037] Embodiment 9, in the lithium battery aluminum foil coating processing production line of the present invention, a set of edge detection devices in plane A or plane B are used to perform edge detection on the carbon-coated aluminum foil, comprising the following steps: S1. Use light to illuminate the edge of the carbonized area of ​​the aluminum foil being transported from the upper and lower sides, and set a certain point in the irradiated area as a collection point. Use CCD detection equipment to monitor the voltage generated by the pixels excited by the reflection of the collection point from the upper and lower sides of the aluminum foil. The collection point is set to include half of the carbonized area and half of the blank area when the aluminum foil is normally transported and coated; At the same time, light is irradiated upward from the lower side of the edge line of the aluminum foil being transported, and a certain point in the irradiated area is set as a collection point. A CCD detection device set closely to the above-mentioned CCD detection device is used to monitor the voltage generated by the pixel excited by the backlight at the collection point from the upper side of the aluminum foil. The collection point is set to include half of the aluminum foil shielding area and half of the backlight area when the aluminum foil is normally transported, and the line connecting the two collection points on the upper surface of the aluminum foil is perpendicular to the conveying direction of the aluminum foil; At the same time, the transmitter and receiver of the opposing photoelectric switch are placed on both sides of the aluminum foil. The laser beam emitted by the transmitter is tangent to the upper surface of the aluminum foil. The laser beam is perpendicular to the conveying direction of the aluminum foil and is directly above the collection point. The position of the CCD detection equipment and the opposing photoelectric switch is set to synchronize the monitoring results. S2. The monitoring information of CCD detection equipment and the beam photoelectric switch is transmitted to the control equipment, which analyzes the running status and coating quality of the aluminum foil conveying according to the detection information, issues warnings and controls the operation of subsequent correction and deviation correction equipment.

[0038] Embodiment 10: The control device 37 receives information from the plug-in edge detection component 14 and the beam photoelectric switch 8, and analyzes the feedback information to issue corresponding control instructions to the unwinder 35, the coating machine 36, the detection and correction integrated machine 38, and the winder 39. All detection devices in plane A are regarded as a set of edge detection devices, and all detection devices in plane B are regarded as a set of edge detection devices. The control device 37 judges the fault as follows: a. Within 0.5s-1s after the edge detection device in plane A detects the fault code, this time is determined according to the distance between plane A and plane B and the feeding speed. The edge detection device in plane B detects normally, and the control device 37 determines that the operation is normal to filter out the influence of occasional changes; b. Within 0.5s-1s after the edge detection device in plane A detects the fault code, the detection result of the edge detection device in plane B is the same as the former, and the control device 37 determines that the edge detection device in plane A detects the fault code. The double determination of the fault is more accurate; c. Within 0.5s-1s after the edge detection device in plane A detects the fault code, the detection result of the edge detection device in plane B is different from the former and abnormal. The control device 37 controls the production line to stop and manually detect the specific fault. Since the edge detection device at the downstream has a higher weight, it is more necessary to use manual judgment when it is uncertain whether the fault is caused by an accidental change.

[0039] Embodiment 11, in step S2 described in embodiment 9, the control device analyzes the running status and coating quality of the aluminum foil conveying according to the aluminum foil detection information, including the following steps: A1. Take a section of normally coated aluminum foil and let it pass through the collection point in time t. Monitor and record the voltage values ​​fed back by each CCD detection device. The interval between the maximum and minimum voltage values ​​in time t is taken as the normal value. The control device assigns a value of 0. If the voltage is less than the normal value and lasts for more than 0.1s, it is assigned a value of 1. If the voltage is greater than the normal value and lasts for more than 0.1s, it is assigned a value of 2. The assigned values ​​of the three CCD detection devices in plane A or plane B are used as the first, second, and third check bits respectively. If the receiver receives light, it is set to 0, and if it does not receive light, it is set to 1. The assigned value of the receiver is used as the fourth check bit. A2. The control device determines the operating status of the coating system according to the check bit generated in step A1. The determination method is as follows: 0000: Carbon coating is normal and transportation is normal; 0001: Carbon coating is normal, and the aluminum foil surface has arches or wrinkles; 0010: Carbon coating is normal, and there is lateral bulge on the edge of the aluminum foil; 0020: Carbon coating is normal, and there is a gap on the aluminum foil surface; 1000, 0100, 1100: There is too much carbon coating in the carbon coating area and the transportation is normal; 1010, 0110, 1110: The carbonized area is over-coated and the edge of the aluminum foil has lateral protrusions; 1020, 0120, 1120: There is too much coating in the carbonized area and there are gaps on the edge of the aluminum foil; 1001, 0101, 1101: The carbonized area is over-coated and the aluminum foil surface is arched or wrinkled; 2000, 0200, 2200: less carbonization in the carbonized area and normal transportation; 2010, 0210, 2210: less carbonized area and lateral bulges on the edge of the aluminum foil; 2020, 0220, 2220: The carbonized area is less coated and there is a gap on the edge of the aluminum foil; 2001, 0201, 2201: The carbonized area is less coated, and the aluminum foil surface is arched or wrinkled; 2100, 1200: One side of the carbonized area is less coated and the other side is more coated, and the transportation is normal; 2110, 1210: The carbonized area has less coating on one side and more coating on the other side, and the edge of the aluminum foil has lateral protrusions; 2100, 1200: The carbonized area has less coating on one side and more coating on the other side, and there is a gap on the edge of the aluminum foil; 2101, 1201: The carbonized area has less coating on one side and more coating on the other side, and the aluminum foil surface has arches or wrinkles; 1110, 2220: The aluminum foil conveying is offset; The last two digits are 11 and 21: one side of the aluminum foil is lifted or bent, and if there is an abnormality in the carbonized area, it is not certain whether the specific factor causing the abnormal carbonization is due to offset or the aluminum foil is not in the same plane, so manual inspection and analysis is required.

[0040] Embodiment 12, the control device controls the detection and correction integrated machine to have the following working modes when correcting a feeding failure: 1. Dealing with wrinkles and folds: The trimming and correction mechanism installed in the Y-axis guide rail is in the initial retracted state, located above the foil. The two motors A are turned on to drive the two unfolding rollers to rotate in opposite directions to simulate the operation of flattening the foil from both sides of the crease by hand. To achieve this operation, the linear speed of the downstream roller group must be greater than the foil feeding speed, and the linear speed of the upstream roller group should be low enough to establish reverse tension. After a short period of flattening by the two roller groups in reverse operation, the motor A drives the unfolding roller group to rotate to an angle where the flattening rollers are not in contact with the processing platform, thus achieving separation, eliminating the need for additional lifting devices; 2. Dealing with excess carbon coating: The Y-axis guide rail installed in the X-axis guide rail is adjusted to a matching position according to the width of the carbon coating area of ​​the foil, and only one or both sides of the trimming and correction mechanism are lowered, and the exhaust fan connected to the trimming and correction mechanism on that side is turned on, and the excess carbon coating is scraped off and sucked away with its scraper, and then the exhaust fan is turned off and the trimming and correction mechanism is folded to complete the operation; 3. Dealing with missing carbon coating: The Y-axis guide rail will retract the trimming correction mechanism to the preset height, and the Y-axis guide rail in the X-axis guide rail is adjusted to a matching position according to the width of the carbon-coated area of ​​the foil. Only one or both sides of the trimming correction mechanism are lowered, and the hot air blower and nozzle connected to the trimming correction mechanism on that side are turned on. After coating and drying, stop spraying and turn off the hot air blower, and retract the trimming correction mechanism to complete the operation.

[0041] It should also be noted that the trimming and correction mechanism involved in the present invention is a prior art, which includes auxiliary equipment that can realize its spraying, drying and suction functions. These auxiliary equipment and the plug-in edge detection components and motor A installed on the detection mechanism mounting plate are electrically connected to the control device and controlled by it.

[0042] The present invention combines the detection mechanism that needs to be adjusted in the X and Y directions in the edge detection device with the moving mechanism that can be moved in the X and Y directions in the feeding correction device, thereby eliminating the need for additional power devices and electricity, and two sets of edge detection devices are arranged on the front side of the unfolding mechanism to more rigorously judge the fault type and filter out the false alarm of the fault. At the same time, the present invention adopts a new unfolding mechanism in view of the need for a lifting mechanism in the existing correction mechanism to realize the contact and separation between the unfolding mechanism and the processing platform, namely, three flattening rollers installed on the support rods of the mounting plate with an angle of 120° to each other, and the flattening roller is only rotated to the bottom. When the end is pulled up and down, its bottom contacts the processing platform, and the rubber layer on its surface is squeezed, forming a static friction force on the aluminum foil to achieve flattening. This design reduces power consumption and cost investment, and the static friction during the flattening operation will not cause potential damage to the aluminum foil. Compared with the existing equipment, the detection result of the present invention is more accurate, and it is convenient to cooperate with the feeding correction device to realize the automatic error correction of the aluminum foil carbon coating processing. The carbon-coated aluminum foil processed by the present invention has a high yield rate, good product consistency, and low technical requirements for the coating equipment. In addition, it occupies a small area, has a low equipment cost, and saves energy, which is a significant technical progress in this field.

[0043] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A lithium battery aluminum foil coating production line, characterized by: include: An unwinder, a coating machine, an integrated detection and correction machine, a winder, and a control device that connects and controls the above devices are arranged in sequence from upstream to downstream; The detection and correction integrated machine comprises: a processing platform, a guide roller A and a guide roller B are arranged at the front end of the processing platform, and a guide roller C is arranged at the rear end, wherein the bottoms of the guide rollers B and C are tangent to the upper surface of the processing platform; a through groove perpendicular to the feeding direction is arranged on the upstream side of the processing platform, and a telescopic device is arranged at each end of the through groove, each telescopic device drives a slider A to slide in the through groove, and a backlight is arranged on the side of the slider A close to the edge of the processing platform, and two plug-in edge detection components are arranged on the side close to the center line of the processing platform, one of which is close to the upstream, and the other is close to the downstream; a gantry is arranged in the middle section of the processing platform, and an inverted T-shaped frame is arranged on each side of the crossbeam of the gantry, and motors A are arranged at each end of the lower part of one of the T-shaped frames, and each motor A drives an unfolding roller group to rotate, and the other end of the unfolding roller group is movably connected to the lower ends of the T-shaped frame on the other side of the gantry; the gantry is also provided with a plurality of inverted T-shaped frames on the inner side of the two T-shaped frames. A pair of connecting rods extending upstream, each pair of connecting rods is fixed with an X-axis guide rail; the upper end of the Y-axis guide rail slides and is positioned in the X-axis guide rail, the trimming correction mechanism is fixed on the clamping claw, and the clamping claw slides up and down and is positioned in the Y-axis guide rail; a detection mechanism mounting plate is fixed on one side of the trimming correction mechanism, and four plug-in edge detection components are installed at the bottom of the detection mechanism mounting plate. After adjusting the horizontal position, two of the plug-in edge detection components can be located directly above the two plug-in edge detection components on the slider A, and form a one-to-one corresponding relationship. At the same time, the other two plug-in edge detection components of the detection mechanism mounting plate are located directly above the backlight; the processing platform is also provided with two opposing photoelectric switches, the two opposing photoelectric switches are arranged in an upstream and downstream relationship, and the line connecting one of them with the plug-in edge detection component on the slider A close to the upstream is perpendicular to the feeding direction, and the line connecting the other with the plug-in edge detection component on the slider A close to the downstream is also perpendicular to the feeding direction.

2. According to claim 1, the lithium battery aluminum foil coating processing production line is characterized in that: The plug-in edge detection assembly comprises: a columnar main body, a socket is provided at the bottom of the main body for docking with the plug on the slider A or the detection mechanism mounting plate, a CCD camera is provided at the top of the main body for receiving light intensity information and converting it into an electrical signal, an oblique spotlight is provided on one side of the upper part of the main body for illuminating the carbonized area and blank area of ​​the aluminum foil above or below the adjacent plug-in edge detection assembly, and the power supply line and signal line of the CCD camera and the spotlight are electrically connected to the socket from the inner side of the main body; the plug-in edge detection assembly may also comprise: a columnar main body, a socket is provided at the bottom of the main body for docking with the plug on the slider A or the detection mechanism mounting plate, a CCD camera is provided at the top of the main body for receiving light intensity information and converting it into an electrical signal, a square table is provided at the outer periphery of the CCD camera at the upper part of the main body, and a ring-shaped LED light strip is provided at the top of the square table and the outer circle of the CCD camera, and the top of the LED light strip is inclined inwardly to facilitate the light to illuminate the carbonized area and blank area of ​​the aluminum foil directly above or below the CCD camera.

3. The lithium battery aluminum foil coating processing production line according to claim 2 is characterized in that: The telescopic device includes a motor B, the shaft end of which drives a screw to rotate, the screw passes through a through hole on a slider A and is movably connected to a baffle, a screw nut is sleeved on the outside of the screw, and is fixed to one end of the slider A by a bolt; a groove is provided on the side of the slider A away from the motor B, two plugs are provided in the groove in the upstream and downstream directions, and the bottoms of two plug-in opposite edge detection components are inserted into the two plugs for installation; a socket A is provided on the side of the slider A close to the motor B, and the socket A is electrically connected to the plug through wiring inside the slider A; a socket B is provided on the inner wall of the through groove, a socket C is provided on the side of the processing platform, socket B is electrically connected to socket C, socket A is electrically connected to socket B through a pluggable wire, and socket C is electrically connected to a control device.

4. The lithium battery aluminum foil coating processing production line according to claim 3 is characterized in that: The unfolding roller group includes: mounting plates arranged at both ends, three adjacent support rods with an angle of 120° are arranged on the outer circumference of the mounting plates, the shaft of the mounting plates is fixed to the rotating shaft of the motor A or is movably connected to the two ends of the T-shaped frame; a flattening roller is fixed to one end of the shaft of the support rod far from the mounting plate, the flattening roller itself does not rotate, and a 1-2 cm thick rubber layer is arranged on the outer side of the flattening roller, when the flattening roller rotates to the lowest point, the rubber layer is squeezed by the processing platform, so that the thickness of the squeezed part is reduced by 0.5-1 cm; the two motors A are both stepping motors, and the rotation directions are opposite when working.

5. The lithium battery aluminum foil coating processing production line according to claim 4 is characterized in that: The transmitting end and the receiving end of the beam-type photoelectric switch are both arranged on the top of the motor B, and the laser emitted by the switch is tangent to the upper surface of the processing platform.

6. The lithium battery aluminum foil coating processing production line according to claim 5, characterized in that: The four plug-in edge detection components installed at the bottom of the detection mechanism mounting plate are divided into two groups, upstream and downstream, with two in each group. The two upstream plug-in edge detection components and the transmitting end and receiving end of the upstream opposing photoelectric switch, as well as the upstream plug-in edge detection component on the slider A are in plane A; the two downstream plug-in edge detection components and the transmitting end and receiving end of the downstream opposing photoelectric switch, as well as the downstream plug-in edge detection component on the slider A are in plane B, and plane A and plane B are parallel and both plane A and plane B are perpendicular to the feeding direction.

7. The lithium battery aluminum foil coating processing production line according to claim 6, characterized in that: A strip-shaped notch is provided at the front end of the processing platform, and a guide roller A is installed in the notch. A guide roller B is installed on the downstream side of the notch, and the top of the guide roller A is higher than the bottom of the guide roller B.

8. The lithium battery aluminum foil coating processing production line according to claim 7, characterized in that: The processing platform is also provided with a friction layer below the unfolding roller group. The friction layer is made of rubber material and is embedded. The upper surface of the friction layer is at the same level as the upper surface of the processing platform.

9. The lithium battery aluminum foil coating processing production line according to claim 8, characterized in that: The control device receives information from the plug-in edge detection component and the beam photoelectric switch, and analyzes the feedback information to issue corresponding control instructions to the unwinder, coating machine, integrated detection and correction machine, and winder. All detection devices in plane A are regarded as a set of edge detection devices, and all detection devices in plane B are regarded as a set of edge detection devices. The control device judges the fault as follows: a. Within 0.5s-1s after the edge detection device in plane A detects the fault code, the edge detection device in plane B detects normal, and the control device determines that the operation is normal; b. Within 0.5s-1s after the edge detection device in plane A detects the fault code, the detection result of the edge detection device in plane B is the same as the former, and the control device determines that the edge detection device in plane A detects the fault code; c. Within 0.5s-1s after the edge detection device in plane A detects the fault code, the detection result of the edge detection device in plane B is different from the previous one and is abnormal. The control equipment controls the production line to stop and manual inspection is carried out to determine the specific fault.

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