Electrode sheet slitting system, control method, and laser focusing method for electrode sheet slitting system

Abstract

An electrode sheet slitting system, comprising an electrode sheet conveying device, which is used for driving an electrode sheet (8) to be conveyed; and a laser cutting device (1), which is configured to be capable of cutting the electrode sheet which is conveyed to a slitting position so as to slit the electrode sheet into a plurality of sub-electrode sheets. Also provided are a control method for the electrode sheet slitting system and a laser focusing method for the electrode sheet slitting system. According to the electrode sheet slitting system, the laser cutting device is used to replace metal cutting tools to cut the electrode sheet, so that the laser cutting device does not need to be frequently maintained, and shutdown is not needed, thus improving the production efficiency.

Description

Pole cutting system, control method and laser focusing method of pole cutting system

[0001] This application claims priority to Chinese patent application No. 202311749548.1 filed on December 18, 2023, entitled “Laser focusing method for pole piece cutting equipment and pole piece cutting equipment”. The entire contents of the above-mentioned Chinese patent application are incorporated into this application by reference. Technical Field

[0002] The present application belongs to the technical field of lithium battery production, and specifically provides a pole piece cutting system, a control method and a laser focusing method for the pole piece cutting system. Background Art

[0003] Currently, lithium battery electrode slitting is primarily done with metal cutters. This involves positioning the cutter according to the desired electrode width and securing it in place. A deviation-correcting device ensures the accurate positioning of both or one side of the incoming wide electrode. After passing through the cutter, the wide electrode is split into narrower electrodes of the desired width.

[0004] However, metal cutters are prone to malfunction after being used for a period of time and need to be maintained or replaced at regular intervals, which affects production efficiency and cutting quality.

[0005] Accordingly, this field requires a new technical solution to solve the above technical problems.

[0006] Summary of the Invention

[0007] The present application aims to solve the above technical problem, that is, to solve the problem that existing hardware cutters require frequent maintenance and thus affect production efficiency.

[0008] In a first aspect, the present application provides a pole piece slitting system, which includes a pole piece slitting device, and the pole piece slitting device includes: a pole piece conveying device, which is used to drive the pole piece to move on a tape; and a laser cutting device, which is configured to cut the pole piece that is moved to a slitting position to cut the pole piece into a plurality of sub-pole pieces.

[0009] When the above technical solution is adopted, the electrode cutting system of the present application uses a laser cutting device to replace the hardware cutter to cut the electrode. The laser cutting device does not require frequent maintenance and does not need to be shut down, which can improve production efficiency.

[0010] In the preferred technical solution of the above-mentioned electrode slitting system, the electrode slitting equipment also includes: a first detection device, which is arranged upstream of the slitting position along the tape-feeding direction of the electrode, and the first detection device is arranged toward the first side of the electrode, and the first detection device is arranged to detect the first electrode information and the first coating area information of the first side of the electrode; and a first control module, which is communicatively connected to the first detection device to receive the information detected by the first detection device, and the first control module is arranged to determine the first optimal cutting point of the first side of the electrode on its width and the first cutting time corresponding to the first optimal cutting point based on the information detected by the first detection device and the first preset parameters, so that the laser of the laser cutting device can move to the first optimal cutting point corresponding to the first cutting time at the first cutting time; the laser cutting device is also arranged to control the laser to move along the width direction of the electrode to change the cutting position of the laser.

[0011] When adopting the above technical solution, the first detection device is used to detect the first pole piece information and the first coating area information of the first side of the pole piece, and transmit the detected information to the first control module. The first control module can determine the first optimal cutting point of the first side of the pole piece on its width according to the information detected by the first detection device, and can determine the first cutting time corresponding to the first optimal cutting point according to the information detected by the first detection device, the detection time, the distance from the first detection device to the cutting position and the tape walking speed of the pole piece 8, so as to facilitate the laser of the laser cutting device to move to the first optimal cutting point at the first cutting time and cut the pole piece, so that the laser can cut at the first optimal cutting point in real time, ensuring that the width of the coating area of ​​the multiple sub-pole pieces after cutting is consistent, so as to ensure the consistency of the capacity of the lithium battery and reduce material waste.

[0012] In the preferred technical solution of the above-mentioned electrode slitting system, the electrode slitting equipment also includes a second detection device communicatively connected to the first control module, and the second detection device is arranged upstream of the slitting position along the tape-walking direction of the electrode, and the second detection device is arranged toward the second side of the electrode, and the second detection device is arranged to detect the second electrode information and the second coating area information of the second side of the electrode, and to transmit the detected information to the first control module, and the first control module is further arranged to determine the second optimal cutting point of the second side of the electrode on its width and the second optimal cutting point according to the information detected by the second detection device and the second preset parameters. Corresponding to the second cutting timing, the first control module is also configured to determine the third optimal cutting point corresponding to the third cutting timing based on the first optimal cutting point and the second optimal cutting point respectively corresponding to the first cutting timing and the second cutting timing at the same moment, so that the laser of the laser cutting device can move to the third optimal cutting point corresponding to the third cutting timing at the third cutting timing, wherein the third cutting timing is the first cutting timing and the second cutting timing at the same moment, and the third optimal cutting point is the midpoint of the line connecting the first optimal cutting point and the second optimal cutting point respectively corresponding to the first cutting timing and the second cutting timing at the same moment.

[0013] When adopting the above-mentioned technical solution, the electrode slitting equipment of the present application includes a first detection device, a second detection device and a first control module. The first detection device is used to detect the first electrode information and the first coating area information of the first side of the electrode, and transmit the detected information to the first control module. The first control module can determine the first optimal cutting point of the first side of the electrode on its width according to the information detected by the first detection device, and can determine the first cutting time corresponding to the first optimal cutting point according to the information detected by the first detection device, the detection time, the distance from the first detection device to the slitting position and the tape speed of the electrode; the second detection device is used to detect the second electrode information and the second coating area information of the second side of the electrode, and transmit the detected information to the first control module. The first control module can determine the first optimal cutting point of the first side of the electrode on its width according to the information detected by the first detection device, the detection time, the distance from the first detection device to the slitting position and the tape speed of the electrode. Determine the second optimal cutting point of the second side of the electrode on its width, and determine the second cutting time corresponding to the second optimal cutting point based on the information detected by the second detection device, the detection time, the distance from the second detection device to the cutting position, and the tape speed of the electrode; the first control module determines the third optimal cutting point corresponding to the third cutting time based on the first optimal cutting point and the second optimal cutting point corresponding to the first cutting time and the second cutting time at the same moment, so that the laser of the laser cutting device can move to the third optimal cutting point corresponding to the third cutting time at the third cutting time and cut the electrode, so that the laser can cut at the third optimal cutting point in real time, ensuring that the width of the coating area of ​​the multiple sub-electrodes after cutting is consistent, so as to ensure the consistency of the capacity of the lithium battery; avoiding secondary cutting and reducing material waste.

[0014] In the preferred technical solution of the above-mentioned pole piece cutting system, the number of the laser cutting devices is N, wherein N≥1 and N is an integer. When N>1, the multiple laser cutting devices are arranged at intervals along the width direction of the pole piece.

[0015] In a preferred technical solution of the above-mentioned electrode slitting system, the first detection device and the second detection device are arranged alternately front and back along the running direction of the electrode.

[0016] In the preferred technical solution of the above-mentioned electrode slitting system, the electrode slitting equipment also includes a third detection device communicatively connected to the first control module. Along the tape-feeding direction of the electrode, the third detection device is arranged downstream of the slitting position. The number of the third detection devices is the same as the number of the sub-electrodes, and multiple third detection devices are respectively arranged toward the first side surfaces of multiple sub-electrodes. The third detection device is configured to detect the first sub-electrode information and the first sub-electrode coating area information of the first side surface of the corresponding sub-electrode, and can transmit the detected information to the first control module.

[0017] In the preferred technical solution of the above-mentioned electrode slitting system, the electrode slitting equipment also includes a third detection device and a fourth detection device communicatively connected to the first control module. Along the tape-walking direction of the electrode, the third detection device and the fourth detection device are both arranged downstream of the slitting position, and the number of the third detection device and the fourth detection device is the same as the number of the sub-electrodes; multiple third detection devices are respectively arranged toward the first side surfaces of multiple sub-electrodes, and the third detection device is arranged to detect the first sub-electrode information and the first sub-electrode coating area information of the first side surfaces of the corresponding sub-electrodes, and to transmit the detected information to the first control module; multiple fourth detection devices are respectively arranged toward the second side surfaces of multiple sub-electrodes, and the fourth detection device is arranged to detect the second sub-electrode information and the second sub-electrode coating area information of the second side surfaces of the corresponding sub-electrodes, and to transmit the detected information to the first control module.

[0018] In the preferred technical solution of the above-mentioned electrode slitting system, the electrode slitting equipment also includes a material cutting device. Along the tape running direction of the electrode, the material cutting device is located downstream of the slitting position. The material cutting device includes a cutting knife and a moving mechanism. The moving mechanism is configured to drive the cutting knife to move between a filling position and a standby position. When the cutting knife is located at the filling position, the cutting knife can cut the electrode. When the cutting knife is located at the standby position, the cutting knife is away from the electrode.

[0019] In the preferred technical solution of the above-mentioned electrode slitting system, the electrode slitting equipment also includes a material head detection device and a second control module. The material head detection device is arranged upstream of the laser cutting device and is communicatively connected to the second control module. The material head detection device is arranged to be able to detect the material head of the electrode and to feedback a signal to the second control module after detecting the material head. The second control module is arranged to be able to determine the timing of the filler knife based on the feedback time of the feedback signal, the distance from the material head detection device to the cutting knife, and the tape running speed of the electrode, so that the moving mechanism drives the cutting knife to move to the filler knife position at the time of the filler knife.

[0020] In the preferred technical solution of the above-mentioned pole piece slitting system, the pole piece slitting equipment also includes a pole piece dust suction device, the dust suction device includes a mounting seat, a first dust suction mechanism, an anti-shake mechanism and a second dust suction mechanism; the first dust suction mechanism, the anti-shake mechanism and the second dust suction mechanism are distributed in sequence along the first direction; the first dust suction mechanism includes a plurality of first dust suction covers, a plurality of the first dust suction covers are mounted on the mounting seat and spaced apart along the second direction; the second dust suction mechanism includes a plurality of second dust suction covers, a plurality of the second dust suction covers are mounted on the mounting seat and spaced apart along the second direction; the anti-shake mechanism includes a partition and a plurality of anti-shake plates, the partition is mounted on the mounting seat, and a plurality of the anti-shake plates are mounted The partition is distributed at intervals along the second direction, and a first through hole is provided on the partition, and a cutting through hole and a plurality of adsorption through holes are provided on the anti-shake plate; the anti-shake plate is located on one side of the partition close to the second dust cover, and there is a running gap between the anti-shake plate and the second dust cover for the pole piece to pass through, and each of the first dust covers is correspondingly provided with an anti-shake plate and a second dust cover, wherein the first dust cover passes through the first through hole and fits with the corresponding anti-shake plate so that the pole piece can be adsorbed on the anti-shake plate, and the first dust cover is arranged opposite to the corresponding second dust cover; wherein, the first direction is the thickness direction of the pole piece, and the second direction is the width direction of the pole piece.

[0021] In the case of adopting the above technical solution, the dust collection device includes a first dust collection mechanism and a second dust collection mechanism located on both sides of the pole piece, the first dust collection mechanism includes a plurality of first dust collection hoods spaced apart along the second direction, and the second dust collection mechanism includes a plurality of second dust collection hoods spaced apart along the second direction, so that dust can be collected from multiple cutting areas of the pole piece on both sides of the pole piece, which is suitable for the case where the pole piece is cut into multiple pole pieces at the same time, and the dust removal effect is good. In addition, an anti-shake mechanism is provided, and the anti-shake mechanism includes a partition and a plurality of anti-shake plates mounted on the partition, the first dust collection hood passes through the first through hole of the partition and fits with the anti-shake plate, so that the vacuum suction force inside the first dust collection hood can adsorb the pole piece to the anti-shake plate through the adsorption through hole and the cutting through hole, so that one side of the pole piece is attached to the anti-shake plate during the tape running process, which can effectively prevent the pole piece from shaking, and is suitable for the case where the pole piece is cut into multiple pole pieces at the same time, and the anti-shake effect is good, which can ensure that each cutting area of ​​the pole piece is always within the cutting focal length of the laser, thereby ensuring the pole piece cutting effect.

[0022] In the preferred technical solution of the above-mentioned pole piece cutting system, the anti-shake mechanism also includes a slide rail assembly, and the partition is slidably connected to the mounting seat through the slide rail assembly. The slide rail assembly can guide the partition during the movement of the partition relative to the mounting seat so that the partition moves linearly along the second direction.

[0023] When adopting the above technical solution, a slide rail assembly is set between the partition and the mounting seat, so that the partition can move relative to the mounting seat along the second direction, thereby facilitating the transfer of the partition between the maintenance position and the working position, and facilitating the pulling of the partition to the maintenance position for maintenance.

[0024] In the preferred technical solution of the above-mentioned pole piece slitting system, the first dust suction mechanism also includes a first connecting plate and a first sliding assembly, the first connecting plate extends along the second direction, the first dust hood is mounted on the first connecting plate, the first connecting plate is connected to the mounting seat through the first sliding assembly, and the first sliding assembly is configured to drive the first connecting plate and the first dust hood to move relative to the mounting seat along the first direction so that the first dust hood approaches or moves away from the anti-shake plate; and / or the second dust suction mechanism also includes a second connecting plate and a second sliding assembly, the second connecting plate extends along the second direction, the second dust hood is mounted on the second connecting plate, the second connecting plate is connected to the mounting seat through the second sliding assembly, and the second sliding assembly is configured to drive the second connecting plate and the second dust hood to move relative to the mounting seat along the first direction so that the second dust hood approaches or moves away from the anti-shake plate.

[0025] When adopting the above technical solution, by setting up a first sliding component, the first connecting plate and the first dust hood can be driven to move along the first direction, so that the first dust hood can be moved away from and close to the anti-shake plate, and the first dust hood can be moved away from the partition before the partition is pulled out; by setting up a second sliding component, the second connecting plate and the second dust hood can be driven to move along the first direction, so that the second dust hood can be moved away from and close to the anti-shake plate, and the second dust hood can be moved away from the partition before the partition is pulled out, thereby avoiding the first dust hood and the second dust hood from affecting the movement of the partition, which is convenient for use.

[0026] In the preferred technical solution of the above-mentioned pole piece cutting system, the second dust suction mechanism also includes a pole piece guide rod, which is installed on the second connecting plate and located above the partition, and the pole piece guide rod and the second dust suction cover are respectively located on both sides of the pole piece.

[0027] When adopting the above technical solution, by arranging a pole piece guide rod on the second connecting plate, and making the pole piece guide rod and the second dust cover respectively located on both sides of the pole piece, when the partition needs to be pulled out for maintenance, the pole piece guide rod can move away from the first dust cover with the second connecting plate, thereby driving the pole piece away from the anti-shake plate, which can avoid damage to the pole piece by the anti-shake plate, thereby protecting the pole piece.

[0028] In the preferred technical solution of the above-mentioned pole piece cutting system, the first sliding assembly includes a first driving member, a first linear guide and a first guide rail slider, the first linear guide is installed on the mounting seat and extends along the first direction, the first guide rail slider is slidably connected to the first linear guide and can slide along the length direction of the first linear guide, the first guide rail slider is connected to the first connecting plate, the first driving member is installed on the mounting seat and connected to the first connecting plate, the first driving member can drive the first connecting plate to move relative to the mounting seat along the first direction; and / or the second sliding assembly includes a second driving member, a second linear guide and a second guide rail slider, the second linear guide is installed on the mounting seat and extends along the first direction, the second guide rail slider is slidably connected to the second linear guide and can slide along the length direction of the second linear guide, the second guide rail slider is connected to the second connecting plate, the second driving member is installed on the mounting seat and connected to the second connecting plate, and the second driving member can drive the second connecting plate to move relative to the mounting seat along the first direction.

[0029] In the preferred technical solution of the above-mentioned pole piece slitting system, the first dust suction mechanism also includes a first spacing adjustment component, the first dust suction hood is connected to the first connecting plate through the first spacing adjustment component, and the first spacing adjustment component is configured to adjust the spacing between two adjacent first dust suction hoods; and / or, the second dust suction mechanism also includes a second spacing adjustment component, the second dust suction hood is connected to the second connecting plate through the second spacing adjustment component, and the second spacing adjustment component is configured to adjust the spacing between two adjacent second dust suction hoods; and / or, the anti-shake mechanism also includes a third spacing adjustment component, the anti-shake plate is connected to the partition through the third spacing adjustment component, and the third spacing adjustment component is configured to adjust the spacing between two adjacent anti-shake plates.

[0030] In the preferred technical solution of the above-mentioned pole piece slitting system, the number of the first dust collection hoods, the second dust collection hoods and the anti-shake plates is the same and both are odd numbers.

[0031] In the preferred technical solution of the above-mentioned pole piece cutting system, the first dust suction hood located in the middle position in the first dust suction mechanism is relatively fixed to the first connecting plate, the second dust suction hood located in the middle position in the second dust suction mechanism is relatively fixed to the second connecting plate, and the anti-shake plate located in the middle position in the anti-shake mechanism is relatively fixed to the partition.

[0032] In the preferred technical solution of the above-mentioned pole piece cutting system, the first spacing adjustment component includes a third linear guide, a plurality of third guide sliders, a plurality of first fixed frames, a connecting rod assembly, a driving rod and a bolt. The third linear guide is mounted on the first connecting plate and extends along the second direction. The plurality of third guide sliders are respectively mounted on the plurality of first fixed frames, and the third guide sliders are slidably connected to the third linear guide and can move along the length direction of the third linear guide. The first dust cover is mounted on the first fixed frame, and the plurality of first fixed frames are connected by the connecting rod assembly. Along the second direction, the first fixed frame located in the middle position is fixedly connected to the first connecting plate, and one of the first fixed frames located at the end is connected to the first end of the driving rod. The second end of the driving rod is provided with a first elongated groove extending along the second direction, and the bolt passes through the first elongated groove and is threadedly connected to the first connecting plate. When the driving rod moves along the second direction, it can drive the first fixed frame connected thereto to move toward or away from the first fixed frame located in the middle position and simultaneously drive the other first fixed frames to move toward or away from the first fixed frame located in the middle position through the connecting rod assembly. The connecting rod assembly The cam is mounted on a second support frame, and the cam is mounted on a second support frame, wherein the cam is mounted on a second support frame and the second support frame is mounted on a third support frame. In the second direction, the second fixing bracket located in the middle position is fixedly connected to the second connecting plate, and two adjacent second fixing brackets are connected by an equal-width block so that the spacing between the two adjacent second fixing brackets is the same; and / or, the third spacing adjustment component includes a limit member and a locking bolt, the limit member is mounted on the partition and extends along the second direction, a limiting surface is formed on the side of the limit member close to the anti-shake plate, the anti-shake plate abuts against the limiting surface, and a second elongated groove extending along the second direction is provided on the partition, and the locking bolt passes through the second elongated groove and is threadedly connected to the anti-shake plate.

[0033] In a second aspect, the present application provides a control method for a pole piece slitting system, the control method comprising: S1: the first detection device detects the first pole piece information and the first coating area information of the first side of the pole piece in real time, and transmits the detected information to the first control module; S2: the first control module determines the first optimal cutting point of the first side of the pole piece on its width based on the first pole piece information and the first coating area information; S3: the first control module obtains the detection time of the first coating area information, the distance from the first detection device to the slitting position and the tape running speed of the pole piece; S4: the first control module determines the first cutting timing corresponding to the first optimal cutting point based on the detection time of the first coating area information, the distance from the first detection device to the slitting position and the tape running speed of the pole piece; S5: the laser cutting device controls the laser to move to the first optimal cutting point corresponding to the first cutting timing at the first cutting timing.

[0034] When adopting the above technical solution, the control method can adjust the cutting position of the laser in real time, so that the laser can be kept at the first optimal cutting point in real time, thereby ensuring that the width of the coating area of ​​the multiple sub-electrode sheets after cutting is consistent, thereby ensuring the quality and performance of the lithium battery.

[0035] In a third aspect, the present application provides another control method for an electrode slitting system, the control method comprising: S1: the first detection device detects the first electrode information and the first coating area information of the first side of the electrode in real time, and transmits the detected information to the first control module; S2: the first control module determines the first optimal cutting point of the first side of the electrode on its width based on the first electrode information and the first coating area information; S3: the first control module obtains the detection time of the first coating area information, the distance from the first detection device to the slitting position and the tape running speed of the electrode; S4: the first control module determines the first cutting timing corresponding to the first optimal cutting point based on the detection time of the first coating area information, the distance from the first detection device to the slitting position and the tape running speed of the electrode; S5: the second detection device detects the second electrode information and the second coating area information of the second side of the electrode in real time, and transmits the detected information to the first control module. to the first control module; S6: the first control module determines the second optimal cutting point of the second side of the electrode on its width according to the second electrode information and the second coating area information; S7: the first control module obtains the detection time of the second coating area information, the distance from the second detection device to the cutting position and the tape running speed of the electrode; S8: the first control module determines the second cutting opportunity corresponding to the second optimal cutting point according to the detection time of the second coating area information, the distance from the second detection device to the cutting position and the tape running speed of the electrode; S9: the first control module determines the third optimal cutting point corresponding to the third cutting opportunity according to the first optimal cutting point and the second optimal cutting point corresponding to the first cutting opportunity and the second cutting opportunity at the same moment; S10: the laser cutting device controls the laser to move to the third optimal cutting point corresponding to the third cutting opportunity at the third cutting opportunity.

[0036] When adopting the above technical solution, the control method can adjust the cutting position of the laser in real time, so that the laser can be kept at the third optimal cutting point in real time, thereby ensuring that the width of the coating area of ​​the multiple sub-electrodes after cutting is consistent, thereby ensuring the consistency of the capacity of the lithium battery, avoiding secondary cutting of the electrode, and reducing material waste.

[0037] In a fourth aspect, the present application provides another control method for a pole piece slitting system, wherein the pole piece slitting system further includes a visual device and a tape detection device, wherein the visual device is located upstream of the cutting position, and the visual device is used to obtain image information of the pole piece in tape; the tape detection device is configured to detect the tape information of the pole piece; the control method includes: the tape detection device detects the tape information of the pole piece in real time; the visual device obtains the image information of the pole piece once every set parameters; based on the image information, determining the optimal cutting point of the pole piece area corresponding to the image information; based on the tape information and the distance from the visual device to the cutting position, determining the cutting timing corresponding to the optimal cutting point; and enabling the laser cutting device to control the laser to move to the optimal cutting point corresponding to the cutting timing at the cutting timing.

[0038] In the case of adopting the above-mentioned technical solution, the control method of the electrode slitting system of the present application is to set a visual device upstream of the laser cutting device to detect the image information of the electrode, and set a tape detection device to detect the tape information of the electrode, so as to determine the optimal cutting point of the electrode and the cutting time corresponding to the optimal cutting point, so that the laser cutting device controls the laser to move to its corresponding optimal cutting point for cutting at the cutting time. This setting method performs position detection before laser cutting, and adjusts the position of the laser cutting point according to the detected position, so that when the electrode is tape-guided to the cutting position, the laser is controlled to cut at the optimal cutting point, realizing position feedback before cutting and adjusting the cutting position of the laser, thereby improving the cutting accuracy and ensuring the yield of the electrode after cutting.

[0039] In the preferred technical solution of the control method of the above-mentioned electrode slitting system, the set parameter is a set tape length or a set time; the step of "the visual device obtains the image information of the electrode once every set parameter" specifically includes: the visual device obtains the image information of the electrode once every set tape length or a set time.

[0040] In the preferred technical solution of the control method of the above-mentioned electrode slitting system, the control method further includes: judging whether the electrode being transported is qualified based on the image information; and selectively issuing an alarm and shutting down the machine according to the judgment result.

[0041] When the above technical solution is adopted, after obtaining the image information, it is further determined whether the electrode on the tape is qualified based on the image information. It is possible to determine whether the incoming electrode is qualified, avoid further processing of unqualified electrodes, avoid the occurrence of more defective products, and avoid wasting energy and time.

[0042] In the preferred technical solution of the control method of the above-mentioned pole piece cutting system, when the laser emitted by the laser cutting device cuts the pole piece, the control method also includes: determining cutting parameters based on the tape running information; and making the laser cutting device emit laser according to the cutting parameters.

[0043] When the above technical solution is adopted, during the laser cutting process, the cutting parameters are determined in real time based on the tape running information so that the laser emitted by the laser cutting device matches the current tape running conditions, thereby ensuring that the pole piece after cutting is free of burrs and other defects.

[0044] In the preferred technical solution of the control method of the above-mentioned electrode slitting system, the electrode slitting system also includes a material head detection device and a hardware cutting device, the material head detection device is used to detect the material head area of ​​the electrode, and the hardware cutting device is configured to be able to move between a standby position and a filler position and to be able to cut the material head area of ​​the electrode running at the filler position, and the filler position is located downstream of the cutting position; the control method also includes: the material head detection device detects the material head area of ​​the electrode in real time to obtain time information of the detection of the material head area; based on the time information, the running information and the distance from the material head detection device to the cutting position, the avoidance timing of the laser cutting device is determined; the laser cutting device stops emitting laser at the avoidance timing or controls the laser to move to the standard cutting point at the avoidance timing; based on the time information, the running information and the distance from the material head detection device to the filler position, the filler timing of the hardware cutting device is determined; the hardware cutting device is moved to the filler position at the filler timing so that the hardware cutting device cuts the material head area.

[0045] When adopting the above technical solution, by real-time detection of the material head area of ​​the electrode, and determining the timing of the metal cutting device to make up the knife and the avoidance timing of the laser cutting device based on the time information and relevant parameters of the material head area detected, the electrode can be smoothly cut, ensuring that the material head area is cut through, avoiding incomplete cutting of the electrode, and being convenient to use and easy to control.

[0046] In the preferred technical solution of the control method of the above-mentioned electrode slitting system, the visual device includes a first visual device and a second visual device, the first visual device is used to obtain the first image information of the first side of the electrode being carried, and the second visual device is used to obtain the second image information of the second side of the electrode being carried; the step of "the visual device obtains the image information of the electrode once every set parameter" specifically includes: the first visual device obtains the first image information of the first side of the electrode once every set parameter; the second visual device obtains the second image information of the second side of the electrode once every set parameter; the step of "based on the image information, determining the optimal cutting point of the electrode area corresponding to the image information" specifically includes: based on the first image information, determining the The first cutting point of the electrode area corresponding to the first image information on the first surface is determined; based on the second image information, the second cutting point of the electrode area corresponding to the second image information is determined on the second surface; based on the first cutting point and the second cutting point corresponding to the same electrode area, the optimal cutting point corresponding to the electrode area is determined; the step of "determining the cutting timing corresponding to the optimal cutting point based on the tape running information and the distance from the visual device to the cutting position" specifically includes: determining the cutting timing corresponding to the optimal cutting point based on the tape running information and the distance from the first visual device to the cutting position; or determining the cutting timing corresponding to the optimal cutting point based on the tape running information and the distance from the second visual device to the cutting position.

[0047] In the preferred technical solution of the control method of the above-mentioned electrode slitting system, the step of "determining the first cutting point of the electrode area corresponding to the first image information on the first surface based on the first image information" specifically includes: identifying the first image information, determining the edge position of the first electrode, the width of the first electrode, the edge position of the first coating area and the width of the first coating area; determining the first cutting point of the electrode area corresponding to the first image information on the first surface based on the edge position of the first electrode, the width of the first electrode, the edge position of the first coating area and the width of the first coating area; the step of "determining the second cutting point of the electrode area corresponding to the second image information on the second surface based on the second image information" specifically includes: identifying the second image information, determining the edge position of the second electrode, the width of the second electrode, the edge position of the second coating area and the width of the second coating area; determining the second cutting point of the electrode area corresponding to the second image information on the second surface based on the edge position of the second electrode, the width of the second electrode, the edge position of the second coating area and the width of the second coating area.

[0048] In the preferred technical solution of the control method of the above-mentioned electrode slitting system, the tape information includes the tape speed of the electrode; the step of "determining the cutting timing corresponding to the optimal cutting point based on the tape information and the distance from the first visual device to the cutting position" specifically includes: determining the first preset time required for the first cutting point to reach the cutting position based on the tape speed and the distance from the first visual device to the cutting position; adding the first preset time to the detection time of the first image information corresponding to the first cutting point to obtain the cutting timing corresponding to the optimal cutting point determined by the first cutting point; or, "determining the cutting timing corresponding to the optimal cutting point based on the tape information and the distance from the second visual device to the cutting position" specifically includes: determining the second preset time required for the second cutting point to reach the cutting position based on the tape speed and the distance from the second visual device to the cutting position; adding the second preset time to the detection time of the second image information corresponding to the second cutting point to obtain the cutting timing corresponding to the optimal cutting point determined by the second cutting point.

[0049] In the preferred technical solution of the control method of the above-mentioned electrode slitting system, the tape information includes the tape length of the electrode; the step of "determining the cutting timing corresponding to the optimal cutting point based on the tape information and the distance from the first visual device to the cutting position" specifically includes: calculating the first length difference between the current tape length and the tape length corresponding to when the first image information is detected; calculating the second length difference between the distance from the first visual device to the cutting position and the first length difference; judging whether the second length difference is equal to 0. When the second length difference is equal to 0, the current moment is determined as the first cutting point. The cutting timing corresponding to the optimal cutting point; or, the step of "determining the cutting timing corresponding to the optimal cutting point based on the tape information and the distance from the second visual device to the cutting position" specifically includes: calculating the third length difference between the current tape length and the tape length corresponding to when the second image information is detected; calculating the fourth length difference between the distance from the second visual device to the cutting position and the third length difference; judging whether the fourth length difference is equal to 0, when the fourth length difference is equal to 0, the current moment is the cutting timing corresponding to the optimal cutting point determined by the second cutting point.

[0050] In a fifth aspect, the present application provides a laser focusing method for a pole piece cutting system, wherein the pole piece cutting system further includes a sensor, a pole piece and a moving device, the laser cutting device is installed on the moving device, and the moving device is configured to drive the laser cutting device toward and away from the pole piece to adjust the distance from the laser cutting device to the pole piece, and the sensor is used to detect the distance from the laser cutting device to the pole piece; the laser focusing method includes the following steps: S1: obtaining the laser working distance a, the laser cutting floating distance b and the sensor detection error d; S2: based on the laser working distance a, the laser cutting floating distance b and the sensor detection error d, determining the maximum test distance L of the focusing test max and minimum test distance L min ; S3: The sensor detects the distance c from the laser cutting device to the pole piece in real time; S4: The distance c from the laser cutting device to the pole piece is adjusted, and the laser cutting device is started once every set moving distance e, so that the laser cutting device emits laser and cuts a preset feature on the pole piece, wherein c∈[L min , L max ], each time the distance c from the laser cutting device to the pole piece is adjusted or before the laser cutting device cuts the preset feature, the pole piece is made to travel a preset length l, so that the distance between two adjacent preset features to be cut is l; S5: Determine the farthest cutting distance c based on all the preset features cut max and the closest cutting distance c min ; S6: based on c max and c min , determine the optimal cutting distance c 焦 ; S7: Make the moving device drive the laser cutting device to move until the distance c between the laser cutting device and the pole piece is equal to the optimal cutting distance c 焦 .

[0051] When adopting the above-mentioned technical solution, the laser focusing method of the present application controls the operation of the mobile device to adjust the distance from the laser cutting device to the pole piece, realizes automatic distance adjustment, cutting and recording, and performs recognition based on the preset features after cutting, and determines the preset features with good cutting effect. According to the position of the corresponding preset features and the corresponding distance from the laser cutting device to the pole piece, the optimal cutting distance is determined. When the image recognition module is used for recognition operation, automatic focusing can be achieved without manual intervention. When manual recognition is used, there is no need for multiple people to intervene, and one person can complete the recognition operation, with high focusing efficiency and higher accuracy.

[0052] In the preferred technical solution of the laser focusing method of the above-mentioned pole piece cutting system, step S4 specifically includes the following steps: S41: the moving device drives the laser cutting device to move, and adjusts the distance c from the laser cutting device to the pole piece to c=c1=L max ; S42: Start the laser cutting device, so that the laser cutting device emits laser and cuts a preset feature on the pole piece; S43: Make the pole piece move a preset length l; S44: Make the moving device drive the laser cutting device to move again, move the laser cutting device toward the pole piece by a set distance e, so that the distance c from the laser cutting device to the pole piece is c = c n =L max -(n-1)×e, where n is the number of times the laser cutting device is adjusted; S45: start the laser cutting device again, so that the laser cutting device emits laser and cuts a preset feature on the pole piece; S46: repeat steps S43, S44 and S45 until L max -(n-1)×e≤L min Then execute step S5.

[0053] In the preferred technical solution of the laser focusing method of the above-mentioned pole piece cutting system, step S5 specifically includes the following steps: S51: identifying all the preset features of the cutting; S52: determining the preset feature of the first cutting through the pole piece, and based on the preset feature of the first cutting through the pole piece, determining the farthest cutting distance c max ; S53: Determine the preset feature of the last cut through the pole piece, and based on the preset feature of the last cut through the pole piece, determine the closest cutting distance c min .

[0054] In the preferred technical solution of the laser focusing method of the above-mentioned pole piece cutting system, step S4 specifically includes the following steps: S41: the moving device drives the laser cutting device to move, and adjusts the distance c from the laser cutting device to the pole piece to c=c1=L min ; S42: Start the laser cutting device, so that the laser cutting device emits laser and cuts a preset feature on the pole piece; S43: Make the pole piece move a preset length l; S44: Make the moving device drive the laser cutting device to move again, move the laser cutting device away from the pole piece by a set distance e, so that the distance c from the laser cutting device to the pole piece is c = c n =L min+(n-1)×e, where n is the number of times the laser cutting device is adjusted; S45: start the laser cutting device again, so that the laser cutting device emits laser and cuts a preset feature on the pole piece; S46: repeat steps S43, S44 and S45 until L min +(n-1)×e≥L max Then execute step S5.

[0055] In the preferred technical solution of the laser focusing method of the above-mentioned pole piece cutting system, step S5 specifically includes the following steps: S51: identifying all the preset features of the cutting; S52: determining the preset feature of the first cutting through the pole piece, and based on the preset feature of the first cutting through the pole piece, determining the closest cutting distance c min ; S53: Determine the preset characteristics of the last cut through the pole piece, and based on the preset characteristics of the last cut through the pole piece, determine the farthest cutting distance c max .

[0056] In the preferred technical solution of the laser focusing method of the above-mentioned electrode cutting system, in step S2, L max =a+b+d, L min =abd; and / or, in step S6, c 焦 =(c max +c min )÷2.

[0057] In the preferred technical solution of the laser focusing method of the above-mentioned pole piece cutting system, the number of the laser cutting devices is multiple, each of the laser cutting devices is installed on one of the moving devices, and the multiple laser cutting devices are distributed at equal intervals along the fourth direction. The sensor includes a first sensor and a second sensor, the first sensor is arranged on one of the laser cutting devices located at one end thereof, and the second sensor is arranged on the other laser cutting device, and the first sensor and the second sensor respectively detect the distance from the corresponding laser cutting device to the pole piece; the laser focusing method comprises the following steps: S1: the first sensor detects the first initial distance c from the first laser cutting device to the pole piece. 1初始 ; S2: The second sensor detects the nth initial distance c from the corresponding nth laser cutting device to the pole piece n初始 ; S3: Based on the first initial distance c 1初始 and the nth initial distance c n初始, determine the distance arithmetic change rate k; S4: obtain the laser working distance a, the laser cutting floating distance b and the sensor detection error d; S5: based on the laser working distance a, the laser cutting floating distance b and the sensor detection error d, determine the maximum test distance L of the focusing test max and minimum test distance L min ; S6: The first sensor detects the distance c1 between the first laser cutting device and the pole piece in real time; S7: Adjust the distance c1 between the first laser cutting device and the pole piece, and start the first laser cutting device once every set moving distance e, so that the first laser cutting device emits laser and cuts a preset feature on the pole piece, wherein c1∈[L min , L max ], each time the distance c1 between the first laser cutting device and the pole piece is adjusted or before the first laser cutting device cuts the preset feature, the pole piece is made to travel a preset length l so that the distance between two adjacent preset features to be cut is l; S8: Determine the farthest cutting distance c according to all the preset features cut max1 and the closest cutting distance c min1 ; S9: based on c max1 and c min1 , determine the optimal cutting distance c corresponding to the laser cutting device 焦1 ; S10: based on c 1初始 and c 焦1 , determine the moving distance Z1 of the moving device corresponding to the first laser cutting device; S11: based on Z1 and the distance arithmetic change rate k, determine the moving distance Z of the moving device corresponding to the mth laser cutting device m ; S12: Move each of the moving devices according to the corresponding moving distance to adjust the distance c from each of the laser cutting devices to the pole piece to the corresponding optimal cutting distance.

[0058] In the preferred technical solution of the laser focusing method of the above-mentioned pole piece cutting system, in step S3,

[0059] In the preferred technical solution of the laser focusing method of the above-mentioned electrode cutting system, in step S10, Z1=c 1初始 -c 焦1 ; In step S11, Z m = Z1+(m-1)×k, wherein m is the mth laser cutting device starting from the first laser cutting device; when Z m When Z is a negative number, the moving direction of the moving device is away from the pole piece. mWhen it is a positive number, the moving direction of the moving device is toward the pole piece.

[0060] Specifically, the laser focusing method of the present application continuously changes the distance from the laser cutting device to the pole piece between the maximum test distance and the minimum test distance, and cuts a preset feature at each position, determines the farthest cutting distance and the closest cutting distance through multiple preset features, and determines the optimal cutting distance based on the farthest cutting distance and the closest cutting distance, thereby determining the position of the laser cutting device relative to the pole piece (i.e., the focal length). Before actual cutting, the laser cutting device is moved to a position where the distance between the laser cutting device and the pole piece is the optimal cutting distance. In addition, the distance c from the laser cutting device to the pole piece is detected in real time by a sensor. The sensor detects the distance in real time, which can ensure that each adjustment of the position of the laser cutting device can be accurate. BRIEF DESCRIPTION OF THE DRAWINGS

[0061] The preferred embodiments of the present application are described below with reference to the accompanying drawings, in which:

[0062] FIG1 is a front view of the pole piece cutting system of the present application, showing the pole piece.

[0063] FIG2 is a schematic diagram of the three-dimensional structure of the electrode cutting system of the present application.

[0064] FIG3 is a schematic diagram of the exploded structure of the dust collecting device of the present application.

[0065] FIG4 is a first schematic diagram of the three-dimensional structure of the dust collecting device of the present application.

[0066] FIG5 is a second schematic diagram of the three-dimensional structure of the dust collection device of the present application, in which a portion of the first dust collection hood and the second dust collection hood are hidden.

[0067] FIG6 is a top view of the dust collection device of the present application, in which a portion of the first dust collection hood and the second dust collection hood are hidden.

[0068] FIG7 is an enlarged structural diagram of point A in FIG6 .

[0069] FIG8 is a cross-sectional view taken along the AA direction in FIG7 .

[0070] FIG9 is a first schematic diagram of the three-dimensional structure of the first dust collection mechanism of the present application.

[0071] FIG10 is a second schematic diagram of the three-dimensional structure of the first dust collection mechanism of the present application.

[0072] FIG11 is a top view of the first dust collection mechanism of the present application.

[0073] FIG12 is a cross-sectional view taken along line BB in FIG11 .

[0074] FIG13 is a schematic diagram of the three-dimensional structure of the second dust suction mechanism of the present application.

[0075] FIG14 is a top view of the second dust collection mechanism of the present application.

[0076] FIG15 is a cross-sectional view taken along the CC direction in FIG14 .

[0077] FIG16 is a schematic diagram of the three-dimensional structure of the anti-shake mechanism of the present application.

[0078] FIG17 is an enlarged structural diagram of point B in FIG16 .

[0079] The reference numerals in Figures 1 to 17 are as follows: 1. laser cutting device; 2. first detection device; 3. second detection device; 4. material cutting device; 5. material detection device; 6. main drive device; 7. dust collection device; 71. mounting base; 72. first dust collection mechanism; 721. first dust collection hood; 722, first connecting plate; 723, first sliding assembly; 7231, first driving member; 7232, first linear guide rail; 7233, first guide rail slider; 724, first position limiting assembly; 725, first spacing adjustment assembly; 7251, third linear guide rail; 7252, third guide rail slider; 7253, first fixing bracket; 7254, connecting rod assembly; 7255, driving rod; 72551, first oblong groove; 72552, first reading mark; 7256, first measuring ruler; 7257, balancing spring; 73, second dust collection mechanism; 731, second dust collection cover; 732, second connecting plate; 733, second sliding assembly; 7331, second driving member; 7332, second linear guide rail; 7333, second guide rail slider; 734, pole piece guide rod; 735, second limit assembly; 736, second spacing adjustment assembly; 7361, fourth linear guide rail; 7362, fourth guide rail slider; 7363, second fixing frame; 7364, equal width block; 74, anti-shake mechanism; 741, partition; 7411, first through hole; 7412, handle; 7413, second oblong groove; 742, anti-shake plate; 7421, cutting through hole; 7422, adsorption through hole; 7423, second reading mark; 743, slide rail assembly; 7431, linear rail; 7432, rail slider; 744, third spacing adjustment assembly; 7441, limiter; 7442, second ruler; 745, locking assembly; 7451, locking cylinder; 7452, locking member; 8, pole piece.

[0080] FIG18 is a flow chart of a control method of the first pole piece cutting system of the present application.

[0081] FIG19 is a flow chart of a control method of a second pole piece cutting system of the present application.

[0082] FIG20 is a schematic structural diagram of a pole piece cutting system according to the fourth aspect of the present application.

[0083] 20 are denoted as follows: 1. visual device; 11. first visual device; 12. second visual device; 2. laser cutting device; 3. tape detection device; 4. material head detection device; 5. hardware cutting device.

[0084] FIG21 is a flow chart of the main steps of the control method of the third pole piece cutting system of the present application;

[0085] FIG22 is a flow chart of a first embodiment of a control method for a third pole piece cutting system of the present application;

[0086] FIG23 is a flow chart of a second embodiment of a control method for a third pole piece cutting system of the present application;

[0087] FIG24 is a flow chart of a third embodiment of a control method for a third pole piece cutting system of the present application;

[0088] FIG25 is a main flow chart of the laser focusing method of the pole piece cutting system of the present application;

[0089] FIG26 is a flow chart of a first embodiment of a laser focusing method for a pole piece cutting system of the present application;

[0090] FIG27 is a flow chart of a second embodiment of the laser focusing method of the pole piece cutting system of the present application;

[0091] FIG28 is a flow chart of a third embodiment of the laser focusing method of the pole piece cutting system of the present application. DETAILED DESCRIPTION

[0092] The preferred embodiments of the present application are described below with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are only used to explain the technical principles of the present application and are not intended to limit the scope of protection of the present application.

[0093] It should be noted that in the description of this application, terms such as "upper," "lower," "front," and "rear" indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings. This is merely for ease of description and does not indicate or imply that the device or element must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, it should not be understood as limiting this application. In addition, the terms "first," "second," "third," and "fourth" are used for descriptive purposes only and should not be understood as indicating or implying relative importance.

[0094] Furthermore, it should be noted that, in the description of this application, unless otherwise expressly specified or limited, the terms "installed," "set," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to direct connections or indirect connections through other components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0095] 1. First Aspect

[0096] In the first aspect, the present application provides a pole piece slitting system, which includes a pole piece slitting device, and the pole piece slitting device includes a pole piece conveying device and a laser cutting device. The pole piece conveying device is used to drive the pole piece to move on the tape, and the laser cutting device is configured to cut the pole piece that is moved to the slitting position, and one pole piece is cut into multiple sub-poles.

[0097] The electrode slitting system of the present application uses a laser cutting device to replace a metal cutter to cut the electrode. The laser cutting device does not require frequent maintenance or downtime, and can improve production efficiency.

[0098] The structure of the electrode cutting system of the present application is specifically described below through five embodiments (embodiments 1-5).

[0099] Example 1

[0100] Specifically, please refer to Figures 1 and 2 at the same time. The electrode slitting system of the present application includes an electrode slitting device, and the electrode slitting device includes an electrode conveying device (not marked in the figure), a laser cutting device 1, a first detection device 2 and a first control module (not shown in the figure).

[0101] Among them, the electrode conveying device is used to drive the electrode 8 to travel on a tape, and the laser cutting device 1 is configured to cut the electrode 8 that is traveled to the cutting position to cut the electrode 8 into multiple sub-electrode sheets; the laser cutting device 1 is also configured to control the laser to move in the width direction of the electrode 8 to change the cutting position of the laser; specifically, the cutting position is the position of the electrode 8 that is directly facing the laser of the laser cutting device 1, and the laser cutting device 1 can move the laser in the width direction of the electrode 8, so that the cutting point of the laser can be moved to the position of the optimal cutting point at any time, and can ensure that the width of the coating area of ​​the multiple sub-electrode sheets after cutting is consistent, thereby ensuring the consistency of the capacity of the lithium battery and ensuring the battery performance.

[0102] Along the running direction of the electrode 8, the first detection device 2 is arranged upstream of the slitting position, and the first detection device 2 is arranged toward the first side (front) of the electrode 8. The first detection device 2 is arranged to be able to detect the first electrode information and the first coating area information of the first side of the electrode 8, and to transmit the detected information to the first control module. The first detection device 2 is used to detect the first electrode information and the first coating area information of the first side (front) of the electrode 8, so as to obtain the front coating area information of the electrode 8 before the electrode 8 is run to the slitting position, so that the first control module can determine the front cutting point corresponding to the front coating area of ​​the electrode 8 according to the information detected by the first detection device 2, and then determine the first optimal cutting point. Specifically, the first electrode information includes the first electrode width information and the first electrode position information; the first coating area information includes the first coating area width information and the first coating area position information.

[0103] The first control module is in communication with the first detection device 2 to receive information detected by the first detection device 2. The first control module is configured to determine the first optimal cutting point of the first side of the electrode 8 on its width and the first cutting timing corresponding to the first optimal cutting point based on the information detected by the first detection device 2 and the first preset parameters, so that the laser of the laser cutting device 1 can move to the first optimal cutting point corresponding to the first cutting timing at the first cutting timing. Specifically, the first preset parameters include the distance between the first detection device 2 and the slitting position, the tape speed of the electrode 8, and the detection time of the first coating area information. The first cutting timing is the time point when the first optimal cutting point reaches the slitting position.

[0104] The electrode slitting system of the present application includes a first detection device 2 and a first control module. The first detection device 2 is used to detect the first electrode information and the first coating area information of the first side of the electrode 8, and transmit the detected information to the first control module. The first control module can determine the first optimal cutting point of the first side of the electrode 8 on its width according to the information detected by the first detection device 2, and can determine the cutting time corresponding to the first optimal cutting point according to the information detected by the first detection device 2, the detection time, the distance from the first detection device 2 to the slitting position and the tape speed of the electrode 8, so as to facilitate the laser of the laser cutting device 1 to move to the first optimal cutting point and cut the electrode 8 at the cutting time, so that the laser can cut at the first optimal cutting point in real time, ensuring that the width of the coating area of ​​the multiple sub-electrodes after slitting is consistent, with higher slitting accuracy to ensure the consistency of the capacity of the lithium battery; and avoiding secondary cutting and reducing material waste.

[0105] It should be noted that this application does not impose any restrictions on the specific structure of the laser cutting device 1 and the method for adjusting the position of the laser on the width of the pole piece. In actual applications, those skilled in the art can set the specific structure of the laser cutting device 1 and the method for adjusting the position of the laser on the width of the pole piece according to actual needs. For example, the laser cutting device 1 includes a laser generator, a galvanometer and a field mirror. The laser emitted by the laser generator passes through the galvanometer and the field mirror in sequence and then irradiates toward the pole piece 8, so that the position of the laser in the width direction of the pole piece 8 can be adjusted by the galvanometer; or the laser cutting device 1 includes a moving mechanism, a laser generator and a field mirror. The laser generator and the field mirror are connected to the moving mechanism, and the field mirror is relatively fixed to the laser generator. The laser emitted by the laser generator passes through the field mirror and irradiates toward the pole piece 8. The moving mechanism is configured to drive the laser generator and the field mirror to move along the width direction of the pole piece 8, so that the position of the laser in the width direction of the pole piece 8 is adjusted by driving the laser generator to move by the moving mechanism; etc. Such adjustments and changes to the specific structure of the laser cutting device 1 do not deviate from the basic principles of this application and should be limited to the scope of protection of this application.

[0106] In one embodiment, the first detection device 2 is a CCD camera.

[0107] In another embodiment, the first detection device 2 is a line laser sensor.

[0108] In another embodiment, the first detection device 2 is a radio frequency sensor.

[0109] It should be noted that this application does not impose any restrictions on the specific structure of the first detection device 2, as long as the first detection device 2 can normally detect the relevant information of the first side of the electrode (first electrode information and first coating area information). In actual applications, those skilled in the art can customize the specific structure of the first detection device 2 according to actual needs. The specific implementation of the first detection device 2 in the above embodiment should not limit the scope of protection of this application.

[0110] Preferably, referring to FIG2 , the number of laser cutting devices 1 is N, where N≥1 and N is an integer. When N>1, multiple laser cutting devices 1 are spaced apart along the width direction of the pole piece 8. One laser cutting device 1 can cut the pole piece 8 into two sub-pole pieces, and N laser cutting devices 1 can simultaneously cut the pole piece 8 into N+1 sub-pole pieces.

[0111] For example, there are five laser cutting devices 1, and the five laser cutting devices 1 correspond to five cutting points, which are spaced apart along the width direction of the pole piece 8. There are five first optimal cutting points, each corresponding to one of the five laser cutting devices 1.

[0112] In a preferred embodiment, the electrode slitting system of the present application also includes a third detection device that is communicatively connected to the first control module, and the third detection device is arranged downstream of the slitting position along the tape-walking direction of the electrode 8. The number of the third detection devices is the same as the number of the sub-pole pieces, and the plurality of third detection devices are respectively arranged toward the first side (front) of the plurality of sub-pole pieces, and the third detection device is arranged to be able to detect the first sub-pole piece information and the first sub-pole piece coating area information of the first side (front) of the corresponding sub-pole piece, and to be able to transmit the detected information to the first control module. Wherein, the first sub-pole piece information includes the first sub-pole piece width information, and the first sub-pole piece coating area information includes the first sub-pole piece coating area width information and the first sub-pole piece coating area position information.

[0113] By providing a third detection device, it is possible to detect the information of the sub-electrode sheets after slitting and feed the information back to the first control module, so that the first control module can determine whether there is an error in the slitting process, determine a compensation value based on the error amount, and adjust the position of the first optimal cutting point at any time. The third detection device, as a post-checking tool, can improve the accuracy of slitting, better ensure the quality of the slitting sub-electrode sheets, and thus ensure the performance of the lithium battery.

[0114] In one embodiment, the third detection device is a CCD camera.

[0115] In another embodiment, the third detection device is a line laser sensor.

[0116] In yet another embodiment, the third detection device is a radio frequency sensor.

[0117] It should be noted that this application does not impose any restrictions on the specific structure of the third detection device, as long as the third detection device can normally detect the relevant information of the first side of the sub-pole piece (the first sub-pole piece information and the first sub-pole piece coating area information). In practical applications, those skilled in the art can set the specific structure of the third detection device according to actual needs. The specific implementation form of the third detection device in the above embodiment should not constitute a limitation on the scope of protection of this application.

[0118] Example 2

[0119] Specifically, please refer to Figure 1 and Figure 2 at the same time. The electrode slitting system of this embodiment includes an electrode slitting device, and the electrode slitting device includes an electrode conveying device (not marked in the figure), a laser cutting device 1, a first detection device 2, a second detection device 3 and a first control module. The first detection device 2 and the second detection device 3 are both communicatively connected to the first control module.

[0120] Among them, the electrode conveying device is used to drive the electrode 8 to travel on a tape, and the laser cutting device 1 is configured to cut the electrode 8 that is traveled to the cutting position to cut the electrode 8 into multiple sub-electrode sheets; the laser cutting device 1 is also configured to control the laser to move in the width direction of the electrode 8 to change the cutting position of the laser; the laser cutting device 1 can move the laser in the width direction of the electrode 8, so that the cutting point of the laser can be moved to the position of the optimal cutting point at any time, thereby ensuring that the width of the coating area of ​​the multiple sub-electrode sheets after cutting is consistent, thereby ensuring the consistency of the capacity of the lithium battery.

[0121] Along the running direction of the electrode 8, the first detection device 2 is arranged upstream of the slitting position, and the first detection device 2 is arranged toward the first side (front) of the electrode 8. The first detection device 2 is arranged to be able to detect the first electrode information and the first coating area information of the first side of the electrode 8, and to transmit the detected information to the first control module. The first detection device 2 is used to detect the first electrode information and the first coating area information of the first side (front) of the electrode 8, so as to obtain the front coating area information of the electrode 8 before the electrode 8 is run to the slitting position, so that the first control module can determine the front cutting point corresponding to the front coating area of ​​the electrode 8 according to the information detected by the first detection device 2, and then determine the first optimal cutting point. Specifically, the first electrode information includes the first electrode width information and the first electrode position information; the first coating area information includes the first coating area width information and the first coating area position information.

[0122] Along the running direction of the electrode 8, the second detection device 3 is arranged upstream of the slitting position, and the second detection device 3 is arranged toward the second side (reverse side) of the electrode 8. The second detection device 3 is arranged to be able to detect the second electrode information and the second coating information of the second side of the electrode 8, and to transmit the detected information to the first control module. The second detection device 3 is used to detect the second electrode information and the second coating area information of the second side (reverse side) of the electrode 8, so as to obtain the reverse coating area information of the electrode 8 before the electrode 8 is run to the slitting position, so that the first control module can determine the reverse cutting point corresponding to the reverse coating area of ​​the electrode 8 according to the information detected by the second detection device 3, and then determine the second optimal cutting point. Specifically, the second electrode information includes the second electrode width information and the second electrode position information; the second coating area information includes the second coating area width information and the second coating area position information.

[0123] The first control module is further configured to determine a second optimal cutting point on the width of the second side of the electrode piece 8 and a second cutting timing corresponding to the second optimal cutting point based on the information detected by the second detection device 3 and second preset parameters. Specifically, the second preset parameters include the distance between the second detection device 3 and the slitting position, the tape speed of the electrode piece 8, and the detection time of the second coating area information. The second cutting timing is the time point when the second optimal cutting point reaches the slitting position.

[0124] The first control module is further configured to determine a third optimal cutting point corresponding to the third cutting opportunity based on the first optimal cutting point and the second optimal cutting point respectively corresponding to the first cutting opportunity and the second cutting opportunity at the same moment, so that the laser of the laser cutting device 1 can move to the third optimal cutting point corresponding to the third cutting opportunity at the third cutting opportunity. The first control module obtains the first optimal cutting point and the second optimal cutting point respectively corresponding to the first cutting opportunity and the second cutting opportunity at the same moment to determine the third optimal cutting point corresponding to the third cutting opportunity. The width of the front coating area and the width of the back coating area of ​​the multiple sub-electrode sheets obtained by cutting at the third optimal cutting point can be kept consistent, thereby better ensuring the consistency of the width of the coating area of ​​the multiple sub-electrode sheets and ensuring the consistency of the capacity of the lithium battery.

[0125] Among them, the third cutting opportunity is the first cutting opportunity and the second cutting opportunity at the same moment, and the third optimal cutting point is the midpoint of the line connecting the first optimal cutting point corresponding to the first cutting opportunity at the same moment and the second optimal cutting point corresponding to the second cutting opportunity at the same moment.

[0126] The electrode slitting system of the present application includes a first detection device 2, a second detection device 3 and a first control module. The first detection device 2 is used to detect the first electrode information and the first coating area information of the first side of the electrode 8, and transmit the detected information to the first control module. The first control module can determine the first optimal cutting point of the first side of the electrode 8 on its width according to the information detected by the first detection device 2, and can determine the first cutting time corresponding to the first optimal cutting point according to the information detected by the first detection device 2, the detection time, the distance from the first detection device 2 to the slitting position and the tape running speed of the electrode 8; the second detection device 3 is used to detect the second electrode information and the second coating area information of the second side of the electrode 8, and transmit the detected information to the first control module. The first control module can determine the second optimal cutting point of the second side of the electrode 8 on its width according to the information detected by the second detection device 3, and can determine the first cutting time corresponding to the first optimal cutting point according to the information detected by the second detection device 3, the detection time, the distance from the second detection device 3 to the slitting position and the tape running speed of the electrode 8 The distance between the cutting positions and the tape speed of the electrode 8 are used to determine the second cutting time corresponding to the second optimal cutting point; the first control module determines the third optimal cutting point corresponding to the third cutting time based on the first optimal cutting point and the second optimal cutting point corresponding to the first cutting time and the second cutting time at the same moment, so that the laser of the laser cutting device 1 can move to the third optimal cutting point corresponding to the third cutting time at the third cutting time and cut the electrode 8, so that the laser can cut at the third optimal cutting point in real time, ensuring that the width of the coating area of ​​the multiple sub-electrodes after cutting is consistent, so as to ensure the consistency of the capacity of the lithium battery; and avoid cutting the electrode twice to reduce material waste.

[0127] The electrode sheet cutting system of this embodiment can ensure that the double-sided coated electrode sheet 8 is cut with equal coating width, thereby ensuring that the width of the coating area of ​​the multiple sub-electrode sheets after cutting is consistent, and ensuring the consistency of the capacity of the lithium battery.

[0128] It should be noted that this application does not impose any restrictions on the specific structure of the laser cutting device 1 and the method for adjusting the position of the laser on the width of the pole piece. In actual applications, those skilled in the art can set the specific structure of the laser cutting device 1 and the method for adjusting the position of the laser on the width of the pole piece according to actual needs. For example, the laser cutting device 1 includes a laser generator, a galvanometer and a field mirror. The laser emitted by the laser generator passes through the galvanometer and the field mirror in sequence and then irradiates toward the pole piece 8, so that the position of the laser in the width direction of the pole piece 8 can be adjusted by the galvanometer; or the laser cutting device 1 includes a moving mechanism, a laser generator and a field mirror. The laser generator and the field mirror are connected to the moving mechanism, and the field mirror is relatively fixed to the laser generator. The laser emitted by the laser generator passes through the field mirror and irradiates toward the pole piece 8. The moving mechanism is configured to drive the laser generator and the field mirror to move along the width direction of the pole piece 8, so that the position of the laser in the width direction of the pole piece 8 is adjusted by driving the laser generator to move by the moving mechanism; etc. Such adjustments and changes to the specific structure of the laser cutting device 1 do not deviate from the basic principles of this application and should be limited to the scope of protection of this application.

[0129] In one embodiment, the first detection device 2 and the second detection device 3 are CCD cameras.

[0130] In another embodiment, the first detection device 2 and the second detection device 3 are line laser sensors.

[0131] In another embodiment, the first detection device 2 and the second detection device 3 are radio frequency sensors.

[0132] It should be noted that this application does not impose any restrictions on the specific structures of the first detection device 2 and the second detection device 3, as long as the first detection device 2 and the second detection device 3 can respectively detect relevant information on the first side surface and the second side surface of the electrode. In actual applications, those skilled in the art can customize the specific structures of the first detection device 2 and the second detection device 3 according to actual needs. The specific implementation of the first detection device 2 and the second detection device 3 in the above-mentioned embodiment should not limit the scope of protection of this application.

[0133] Preferably, referring to FIG2 , the number of laser cutting devices 1 is N, where N≥1 and N is an integer. When N>1, multiple laser cutting devices 1 are spaced apart along the width direction of the pole piece 8. One laser cutting device 1 can cut the pole piece 8 into two sub-pole pieces, and N laser cutting devices 1 can simultaneously cut the pole piece 8 into N+1 sub-pole pieces.

[0134] For example, there are five laser cutting devices 1, and the five laser cutting devices 1 correspond to five cutting points, which are spaced apart along the width direction of the pole piece 8. There are five first optimal cutting points, five second optimal cutting points, and five third optimal cutting points, each corresponding to five laser cutting devices 1.

[0135] In a preferred embodiment, referring to FIG. 1 , along the running direction of the pole piece 8 , the first detection device 2 and the second detection device 3 are arranged in a staggered manner front to back.

[0136] The first detection device 2 and the second detection device 3 are staggered so that there is a certain distance between the first detection device 2 and the second detection device 3, which can better utilize the space for assembly and reduce the difficulty of assembly.

[0137] In another preferred embodiment, the first detection device 2 and the second detection device 3 are arranged opposite each other. The first detection device 2 and the second detection device 3 are arranged opposite each other, so that the front and back information of the same area of ​​the electrode piece 8 can be detected at the same time, which can reduce the processing difficulty, but increase the installation difficulty.

[0138] In a preferred embodiment, the electrode slitting system of the present application further includes a third detection device and a fourth detection device communicatively connected to the first control module. The third detection device and the fourth detection device are both arranged downstream of the cutting position along the tape running direction of the electrode 8. The number of the third detection device and the fourth detection device is the same as the number of the sub-electrode sheets.

[0139] A plurality of third detection devices are respectively arranged toward the first side surfaces (front surfaces) of the plurality of sub-pole pieces, and the third detection devices are configured to detect first sub-pole piece information and first sub-pole piece coating area information of the first side surfaces (front surfaces) of the corresponding sub-pole pieces, and to transmit the detected information to the first control module. The first sub-pole piece information includes first sub-pole piece width information, and the first sub-pole piece coating area information includes first sub-pole piece coating area width information and first sub-pole piece coating area position information.

[0140] The plurality of fourth detection devices are respectively arranged toward the second side surfaces (reverse surfaces) of the plurality of sub-pole pieces, and the fourth detection devices are configured to detect the second sub-pole piece information and the second sub-pole piece coating area information of the second side surfaces of the corresponding sub-pole pieces, and to transmit the detected information to the first control module. The second sub-pole piece information includes the second sub-pole piece width information, and the second sub-pole piece coating area information includes the second sub-pole piece coating area width information and the second sub-pole piece coating area position information.

[0141] By providing a third detection device and a fourth detection device, the sub-electrode sheet information on the front and back sides of the slit sub-electrode sheet can be detected respectively, and the sub-electrode sheet information is fed back to the first control module so that the first control module can determine whether there is an error in the slitting process, determine a compensation value based on the error amount, and adjust the position of the third optimal cutting point at any time. The third and fourth detection devices can serve as post-review tools to improve the accuracy of slitting, better ensure the quality of the slit sub-electrode sheet, and thus ensure the performance of the lithium battery.

[0142] In one embodiment, the third detection device and the fourth detection device are CCD cameras.

[0143] In another embodiment, the third detection device and the fourth detection device are line laser sensors.

[0144] In yet another embodiment, the third detection device and the fourth detection device are radio frequency sensors.

[0145] It should be noted that this application does not impose any restrictions on the specific structures of the third and fourth detection devices. In practical applications, those skilled in the art may customize the specific structures of the third and fourth detection devices based on actual needs. The specific implementations of the third and fourth detection devices in the above embodiments should not limit the scope of protection of this application.

[0146] Example 3

[0147] On the basis of Example 1 and Example 2, the electrode slitting equipment of this embodiment further includes a stub cutting device 4. Along the electrode tape running direction, the stub cutting device 4 is located downstream of the slitting position.

[0148] Preferably, the material cutting device 4 includes a cutting knife (not shown in the figure) and a moving mechanism (not shown in the figure). The moving mechanism is configured to drive the cutting knife to move between the filling position and the standby position. When the cutting knife is located at the filling position, the cutting knife can cut the pole piece 8. When the cutting knife is located at the standby position, the cutting knife is away from the pole piece 8.

[0149] Among them, the number of cutting knives is the same as the number of laser cutters. When the number of cutting knives is greater than or equal to 2, multiple cutting knives are equally spaced along the width direction of the pole piece 8, that is, the cutting position is the preset cutting position of the pole piece 8, so that the cutting position is the corresponding cutting position where the pole piece 8 is equally divided into multiple sub-pole pieces.

[0150] The electrode slitting system of this embodiment is provided with a material head cutting device 4, which can cut the material head to avoid the situation where the laser cutting is not thorough, and ensure that the electrode 8 is smoothly cut into multiple sub-electrodes. A moving mechanism is provided therein to drive the cutting knife to move between the filling position and the standby position, so that when the cutting knife is needed for cutting, the cutting knife is driven to move to the filling position to cut the electrode 8, and when the cutting knife is not needed for cutting, the cutting knife is driven to move to the standby position, so that the cutting knife is away from the electrode 8 and does not contact the electrode 8, so as to avoid accidentally cutting the electrode 8, so as to ensure that the width of the coating area between the available sub-electrodes after cutting is consistent.

[0151] In a preferred embodiment, please continue to refer to Figure 1. The electrode slitting system of this embodiment also includes a material head detection device 5 and a second control module (not shown in the figure). The material head detection device 5 is arranged upstream of the laser cutting device 1 and is communicatively connected to the second control module.

[0152] The material end detection device 5 is configured to detect the material end of the electrode 8 and to provide a feedback signal to the second control module after detecting the material end. The second control module is configured to determine the timing of the supplementary cutting based on the feedback time of the feedback signal, the distance between the material end detection device 5 and the cutting knife, and the tape running speed of the electrode 8, so that the moving mechanism drives the cutting knife to the supplementary cutting position at the time of the supplementary cutting. Specifically, the supplementary cutting timing is the time when the material end is fed to the cutting position.

[0153] By providing the material head detection device 5 and the second control module, the cutting knife can be better able to reach the filling position at the filling time, so as to smoothly cut the material head and be more convenient to control.

[0154] It should be noted that the first control module and the second control module can be the same control module or different control modules. In actual applications, those skilled in the art can set them according to actual needs.

[0155] In a preferred embodiment, the material end detection device 5 includes a laser emitter and a laser receiver respectively arranged on both sides of the pole piece 8. The laser emitter and the laser receiver are arranged opposite each other. The laser emitter can emit laser light, and the laser receiver can receive the laser light emitted by the laser emitter. The pole piece is not transparent to laser light. After the tape is used to stick the two pole pieces together at their ends, there is a gap between the two pole pieces. The laser light can pass through the tape and the gap, and thus be received by the laser receiver. Therefore, when the laser receiver receives the laser light, it indicates that the material end has been detected, that is, the end of the previous pole piece has been brought to the material end detection device 5.

[0156] Example 4

[0157] Based on Example 1, Example 2 and Example 3, please refer to Figures 1 and 2. The pole piece slitting system of this embodiment also includes a main drive device 6, which is arranged upstream of the slitting position, and the main drive device 6 is configured to change the running direction of the pole piece 8 and to cut off the tension of the pole piece 8.

[0158] Setting up the main drive device 6 can cut off the tension of the pole piece 8, avoid the pole piece 8 being controlled by tension in the cutting area, improve the slitting effect, and change the tape running direction of the pole piece 8, so that the pole piece 8 moves smoothly toward the slitting position for smooth slitting.

[0159] Preferably, the main drive device 6 includes an active roller, a driving member (for example, a servo motor or a stepping motor) that drives the active roller to rotate, and a passive clamping roller. The driving member is connected to the active roller and can drive the active roller to rotate. There is a gap between the passive clamping roller and the active roller. The pole piece 8 is located in the gap. The passive clamping roller contacts the active roller through the pole piece 8. When the active roller rotates, it can drive the pole piece 8 to move and drive the passive clamping roller to rotate synchronously.

[0160] Example 5

[0161] Based on Example 1, Example 2, Example 3 and Example 4, please refer to Figure 1 and Figure 2 at the same time. The electrode cutting equipment of this embodiment also includes a dust suction device 7. The dust suction device 7 is configured to prevent the electrode 8 from shaking when the laser cutting device 1 cuts the electrode 8, and to remove the dust generated by the cutting.

[0162] The present application sets a dust suction device 7 to remove dust during the cutting process of the pole piece 8 to prevent dust from adhering to the surface of the pole piece 8, thereby ensuring battery performance. In addition, it can effectively prevent the pole piece 8 from shaking, so that the pole piece 8 is always located within the focal length of the laser cutting, ensuring the cutting effect of the pole piece 8.

[0163] Specifically, please refer to Figures 3 to 17 at the same time. The dust suction device 7 includes a mounting base 71 and a first dust suction mechanism 72, an anti-shake mechanism 74, and a second dust suction mechanism 73 installed on the mounting base 71, wherein the first dust suction mechanism 72, the anti-shake mechanism 74, and the second dust suction mechanism 73 are distributed in sequence along the first direction, and there is a tape running gap between the anti-shake mechanism 74 and the second dust suction mechanism 73, and the pole piece 8 is tape-running through the tape running gap. The pole piece cutting system is used to cut the pole piece to cut the pole piece into multiple sub-pole pieces of equal width. The dust suction device removes dust when the pole piece is cut to avoid dust adhering to the surface of the pole piece, thereby ensuring battery performance. It should be noted that the first direction in this application is the thickness direction of the pole piece, the second direction is the width direction of the pole piece, and the third direction is the tape running direction of the pole piece.

[0164] Specifically, please refer to Figures 3 to 17 at the same time. The first dust suction mechanism 72 includes multiple first dust suction covers 721. The multiple first dust suction covers 721 are installed on the mounting base 71 and are spaced apart along the second direction. The multiple first dust suction covers 721 correspond to multiple cutting areas respectively, so as to remove dust on one side of the electrode in the corresponding cutting area during the electrode cutting process.

[0165] The second dust collection mechanism 73 includes a plurality of second dust collection covers 731, which are installed on the mounting base 71 and spaced apart along the second direction; a plurality of second dust collection covers 731 are provided corresponding to a plurality of cutting areas respectively, so as to remove dust on the other side of the electrode in the cutting area corresponding thereto during the electrode cutting process.

[0166] The anti-shake mechanism 74 includes a partition 741 and multiple anti-shake plates 742. The partition 741 is installed on the mounting base 71, and the multiple anti-shake plates 742 are installed on the partition 741 and spaced apart along the second direction. The partition 741 is provided with a first through hole 7411, and the anti-shake plate 742 is provided with a cutting through hole 7421 and multiple adsorption through holes 7422; the multiple anti-shake plates 742 correspond to multiple cutting areas respectively, wherein the cutting point of the pole piece is located in the cutting through hole 7421, and the cutting through hole 7421 facilitates the laser to pass through and cut the pole piece. The vacuum suction force in the first dust cover 721 forms an adsorption force through the cutting through hole 7421 and the adsorption through holes 7422, so that the pole piece can be adsorbed on the anti-shake plate 742, so that the pole piece is attached to the anti-shake plate 742 for tape transport, thereby effectively preventing the pole piece from shaking, ensuring that the pole piece is always within the focal length of the laser cutting, and thus ensuring the pole piece cutting effect.

[0167] Please refer to Figure 8. The anti-shake plate 742 is located on one side of the partition plate 741 close to the second dust hood 731, and there is a running gap between the anti-shake plate 742 and the second dust hood 731 for the pole piece 8 to run through. The pole piece 8 runs through the running gap between the anti-shake plate 742 and the second dust hood 731. Each first dust hood 721 is correspondingly provided with an anti-shake plate 742 and a second dust hood 731, wherein the first dust hood 721 passes through the first through hole 7411 and fits with its corresponding anti-shake plate 742, so as to provide sufficient vacuum adsorption force for the anti-shake plate 742, so that the pole piece can be adsorbed on the anti-shake plate 742, and the first dust hood 721 is arranged opposite to its corresponding second dust hood 731; the first dust hood 721 and the second dust hood 731 are arranged opposite to each other, and the dust generated during the pole piece cutting process is sucked away and removed on both sides of the pole piece 8.

[0168] In addition, the first dust hood 721 and the second dust hood 731 are both connected to a vacuum device through a pipeline, and the vacuum device is used for vacuuming to form suction in the first dust hood 721 and the second dust hood 731, thereby extracting dust.

[0169] The dust suction device 7 of the present application includes a first dust suction mechanism 72 and a second dust suction mechanism 73 located on both sides of the pole piece, and the first dust suction mechanism 72 includes a plurality of first dust suction covers 721 spaced apart along the second direction, and the second dust suction mechanism 73 includes a plurality of second dust suction covers 731 spaced apart along the second direction, so that the plurality of cutting areas of the pole piece can be dusted on both sides of the pole piece, which is suitable for the situation where the pole piece is cut into multiple pole pieces at the same time, and can ensure the dust removal effect. In addition, an anti-shake mechanism 74 is provided, and the anti-shake mechanism 74 includes a partition 741 and a plurality of dust suction covers installed on the partition 741. An anti-shake plate 742 is provided, and the first dust cover 721 passes through the first through hole 7411 of the partition 741 and fits with the anti-shake plate 742, so that the vacuum adsorption force inside the first dust cover 721 can adsorb the electrode onto the anti-shake plate 742 through the adsorption through hole 7422 and the cutting through hole 7421, so that one side of the electrode is attached to the anti-shake plate 742 during the tape running process, which effectively avoids the shaking of the electrode. It is suitable for the situation where the electrode is cut into multiple electrode pieces at the same time, has a good anti-shake effect, and can ensure that each cutting area of ​​the electrode is always within the cutting focal length of the laser, thereby ensuring the electrode cutting effect.

[0170] It should be noted that this application does not impose any restrictions on the specific number of the first dust hood 721, the second dust hood 731, and the anti-shake plate 742. As long as the number of the first dust hood 721, the second dust hood 731, and the anti-shake plate 742 is the same, it is sufficient. In actual applications, those skilled in the art can adjust the number of the first dust hood 721, the second dust hood 731, and the anti-shake plate 742 based on actual needs (splitting requirements). For example, the number of the first dust hood 721, the second dust hood 731, and the anti-shake plate 742 can all be three; or the number of the first dust hood 721, the second dust hood 731, and the anti-shake plate 742 can all be five. Such adjustments and changes to the specific number of the first dust hood 721, the second dust hood 731, and the anti-shake plate 742 do not deviate from the basic principles of this application and are within the scope of protection of this application.

[0171] Preferably, the gap between the pole piece and the anti-shake plate 742 is smaller than the gap between the pole piece and the second dust cover 731. This arrangement allows the pole piece to be smoothly adsorbed on the anti-shake plate 742 and prevents the pole piece from being adsorbed on the cover opening of the second dust cover 731.

[0172] In a preferred embodiment, the number of the first dust collection covers 721 , the second dust collection covers 731 and the anti-shake plates 742 is the same and is an odd number.

[0173] In a preferred embodiment, referring to Figures 16 and 17, the anti-shake mechanism 74 also includes a slide rail assembly 743, and the partition 741 is slidably connected to the mounting seat 71 through the slide rail assembly 743, so that the partition 741 can be transferred between the working position and the maintenance position. The slide rail assembly 743 can guide the partition 741 during the movement of the partition 741 relative to the mounting seat 71, so that the partition 741 moves linearly along the second direction.

[0174] A slide rail assembly 743 is provided between the partition 741 and the mounting seat 71, so that the partition 741 can move relative to the mounting seat 71 along the second direction, thereby facilitating the conversion of the partition 741 between the maintenance position and the working position, and facilitating the partition 741 to be pulled out to the maintenance position for maintenance.

[0175] In a preferred embodiment, referring to Figures 16 and 17 , the rail assembly 743 includes a linear rail 7431 and a rail slider 7432. The linear rail 7431 is mounted on the partition 741 and extends along the second direction. The rail slider 7432 is mounted on the mounting base 71 and is capable of sliding along the linear rail 7431. The rail assembly 743 is configured to include the linear rail 7431 and the rail slider 7432, with the linear rail 7431 mounted on the partition 741 and the rail slider 7432 mounted on the mounting base 71. The structure is simple and easy to assemble and use.

[0176] In another embodiment, the slide rail assembly 743 includes a linear rail 7431 and a rail slider 7432. The linear rail 7431 is installed on the mounting seat 71 and extends along the second direction. The rail slider 7432 is installed on the partition 741 and can slide along the linear rail 7431.

[0177] It should be noted that this application does not impose any restrictions on the specific structure of the slide rail assembly 743. In actual applications, those skilled in the art can customize the structure of the slide rail assembly 743 according to actual needs. The specific implementation of the slide rail assembly 743 in the above embodiment should not limit the scope of protection of this application.

[0178] 16 , a handle 7412 is provided on the partition 741 so that the partition 741 can be pulled relative to the mounting base 1 by the handle 7412. The handle 7412 is provided to facilitate manual pulling of the partition 741 from the working position to the maintenance position for maintenance.

[0179] In a preferred embodiment, referring to FIG16 , the anti-shake mechanism 74 further includes a locking assembly 745 mounted on the mounting base 71. The locking assembly 745 is configured to lock the partition 741 in the working position along a first direction. The locking assembly 745 is provided to lock the partition 741 in the first direction, thereby preventing the partition 741 from swaying or vibrating in the first direction due to device oscillation, thereby preventing the partition 741 from swaying due to device oscillation, and further preventing the pole piece from shaking, thereby ensuring a good slitting effect.

[0180] In a preferred embodiment, referring to FIG. 16 , the locking assembly 745 includes a locking cylinder 7451 and a locking member 7452 mounted on the mounting base 71. The locking cylinder 7451 and the locking member 7452 are respectively located on opposite sides of the partition 741 and are arranged in a facing relationship. The locking member 7452 contacts one side of the partition 741. The locking cylinder 7451 can move toward and away from the locking member 7452 in a first direction to abut and separate from the locking member 7452, thereby clamping and releasing the partition 741. The locking assembly 745 comprising the locking cylinder 7451 and the locking member 7452 provides a simple structure, is easy to assemble and use, and has a good locking effect.

[0181] In a preferred embodiment, please refer to Figures 10 to 12 at the same time. The first dust suction mechanism 72 also includes a first connecting plate 722 and a first sliding assembly 723. The first connecting plate 722 extends along the second direction. The first dust suction hood 721 is installed on the first connecting plate 722. The first connecting plate 722 is connected to the mounting seat 71 through the first sliding assembly 723. The first sliding assembly 723 is configured to drive the first connecting plate 722 and the first dust suction hood 721 to move relative to the mounting seat 71 along the first direction to make the first dust suction hood 721 close to or away from the anti-shake plate 742.

[0182] By setting up the first sliding component 723, the first connecting plate 722 and the first dust hood 721 can be driven to move along the first direction so that the first dust hood 721 is moved away from the anti-shake plate 742 and close to the anti-shake plate 742. Before pulling out the partition 741, the first dust hood 721 can be moved away from the partition 741 first, so as not to affect the movement of the partition 741, which is convenient for use.

[0183] In a preferred embodiment, please continue to refer to Figure 12. The first sliding assembly 723 includes a first driving member 7231 (for example, a pneumatic cylinder or an electric cylinder), a first linear guide rail 7232 and a first guide rail slider 7233. The first linear guide rail 7232 is installed on the mounting seat 71 and extends along the first direction. The first guide rail slider 7233 is slidingly connected to the first linear guide rail 7232 and can slide along the length direction of the first linear guide rail 7232; the first guide rail slider 7233 is connected to the first connecting plate 722, and the first driving member 7231 is installed on the mounting seat 71 and connected to the first connecting plate 722. The first driving member 7231 can drive the first connecting plate 722 to move relative to the mounting seat 71 along the first direction.

[0184] The first sliding assembly 723 is configured to include a first driving member 7231 , a first linear guide rail 7232 and a first guide rail slider 7233 , which has a simple structure and is convenient for assembly and use.

[0185] Although the first sliding assembly 723 is set as the first driving member 7231, the first linear guide 7232 and the first guide rail slider 7233 in the above embodiment, this should not limit the protection scope of this application. In actual applications, those skilled in the art can set the specific structure of the first sliding assembly 723 according to actual needs. For example, the first sliding assembly 723 can also be set to a structural form in which the first motor is matched with the first ball screw. Such adjustments and changes to the specific structure of the first sliding assembly 723 do not deviate from the basic principles of this application and should be limited to the protection scope of this application. Of course, it is preferred to set the first sliding assembly 723 to the first driving member 7231, the first linear guide 7232 and the first guide rail slider 7233, which has a simple structure, is easy to assemble and use, and has a small size.

[0186] In a preferred embodiment, there are two first sliding assemblies 723, and the two first sliding assemblies 723 are spaced apart along the second direction. The two first sliding assemblies 723 are arranged to simultaneously drive the first connecting plate 722 to move at two positions, thereby ensuring stable movement of the first connecting plate 722.

[0187] In a preferred embodiment, referring to Figures 10 and 11 , the first dust collection mechanism 72 further includes a first limiting assembly 724. The first limiting assembly 724 is capable of limiting the position of the first connecting plate 722 as the first connecting plate 722 moves along the first direction toward the second dust collection hood 731. The first limiting assembly 724 is configured to limit the position of the first connecting plate 722 to prevent the first connecting plate 722 from excessive movement, thereby facilitating the positioning of the first dust collection hood 721 in the operating position.

[0188] Exemplarily, the first limiting assembly 724 includes a first limiting column and a first limiting plate. The first limiting plate is installed on the mounting seat 71. The first limiting column is installed on the first connecting plate 722 and is arranged toward the first limiting plate. The first limiting column is located on the side of the first limiting plate away from the second dust hood 731. After the first limiting column abuts against the first limiting plate, it can limit the first connecting plate 722 from continuing to move toward the second dust hood 731.

[0189] In a preferred embodiment, referring to FIG. 10 , the first dust collecting mechanism 72 further includes a first spacing adjustment component 725 , and the first dust collecting hood 721 is connected to the first connecting plate 722 via the first spacing adjustment component 725 . The first spacing adjustment component 725 is configured to be able to adjust the spacing between two adjacent first dust collecting hoods 721 .

[0190] A first spacing adjustment component 725 is further provided to adjust the spacing between two adjacent first dust hoods 721, so that the first dust collection mechanism 72 can be adapted to the cutting of pole pieces of different widths, making the dust collection device more convenient to use and applicable to a variety of usage scenarios.

[0191] In a preferred embodiment, the first dust collection cover 721 located in the middle of the first dust collection mechanism 72 is fixed relative to the first connecting plate 722. The position of the first dust collection cover 721 located in the middle is fixed, and when adjusting the distance between two adjacent first dust collection covers 721, the adjustment is made based on the first dust collection cover 721 located in the middle, which facilitates adjustment operations and facilitates positioning and calculation.

[0192] In a preferred embodiment, please refer to Figures 9 and 10 at the same time. The first spacing adjustment assembly 725 includes a third linear guide rail 7251, a plurality of third guide rail sliders 7252, a plurality of first fixing frames 7253, a connecting rod assembly 7254, a driving rod 7255 and a bolt (not shown in the figure).

[0193] The third linear guide rail 7251 is mounted on the first connecting plate 722 and extends along the second direction. A plurality of third guide rail sliders 7252 are respectively mounted on a plurality of first fixing frames 7253. The third guide rail sliders 7252 are slidably connected to the third linear guide rail 7251 and can move along the length direction of the third linear guide rail 7251. The first dust cover 721 is mounted on the first fixing frame 7253. The plurality of first fixing frames 7253 are connected by a connecting rod assembly 7254. Along the second direction, the first fixing frame 7253 located in the middle position is fixedly connected to the first connecting plate 722. A first fixing frame 7253 located at the end is connected to the first end of the driving rod 7255. The second end of the driving rod 7255 A first elongated groove 72551 extending along the second direction is provided, and a bolt passes through the first elongated groove 72551 and is threadedly connected to the first connecting plate 722; when the driving rod 7255 moves along the second direction, it can drive the first fixing frame 7253 connected thereto to move toward or away from the first fixing frame 7253 located in the middle position, and at the same time drive the other first fixing frames 7253 to move toward or away from the first fixing frame 7253 located in the middle position through the connecting rod assembly 7254, so as to adjust the distance between two adjacent first fixing frames 7253, and the connecting rod assembly 7254 is configured to keep the distance between two adjacent first fixing frames 7253 at an equal interval when driving the first fixing frames 7253 to move.

[0194] The first spacing adjustment assembly 725 is configured as a third linear guide rail 7251, a plurality of third guide rail sliders 7252, a plurality of first fixing brackets 7253, a connecting rod assembly 7254, a drive rod 7255, and bolts. Its structure is simple, easy to assemble and use, and low in cost. To adjust the spacing between two adjacent first dust hoods 721, the bolts are loosened, the drive rod 7255 is moved into position along the second direction, and the bolts are tightened again, making adjustment easy.

[0195] In other embodiments, the first spacing adjustment component 725 includes a first linear motor, which includes a first stator and multiple first movers cooperating with the first stator. The first stator is installed on the first connecting plate 722 and extends along the second direction. Multiple first dust hoods 721 are respectively installed on the multiple first movers, thereby enabling electric adjustment.

[0196] It should be noted that this application does not impose any restrictions on the specific structure of the first spacing adjustment component 725. In actual applications, those skilled in the art can independently determine the specific structure of the first spacing adjustment component 725 according to actual needs. The specific implementation of the first spacing adjustment component 725 in the above embodiment should not limit the scope of protection of this application.

[0197] In a preferred embodiment, referring to Figures 9 and 10 , the first spacing adjustment assembly 725 further includes a first ruler 7256 mounted on the first connecting plate 722 and extending in the second direction. A first reading mark 72552 is provided at the second end of the driving rod 7255. The first reading mark 72552 corresponds to the scale value of the first ruler 7256. The first reading mark 72552 and the first ruler 7256 allow the position of the first dust hood 721 to be determined by the scale value of the first ruler 7256 corresponding to the first reading mark 72552, thereby determining whether the first dust hood 721 is properly adjusted, which is more convenient for use.

[0198] In a preferred embodiment, referring to Figure 10 , the first spacing adjustment assembly 725 further includes a plurality of equal-length balancing springs 7257. Each balancing spring 7257 is positioned between two adjacent first fixing brackets 7253. The ends of the balancing springs 7257 are connected to the two first fixing brackets 7253, respectively, and the balancing springs 7257 are always in a compressed state. By providing the balancing springs 7257 and maintaining them in a compressed state, the gap at the connection of the connecting rod assembly 7254 can be compensated, thereby maintaining a constant distance between two adjacent first fixing brackets 7253.

[0199] In a preferred embodiment, please refer to Figures 12 to 14 at the same time. The second dust suction mechanism 73 also includes a second connecting plate 732 and a second sliding assembly 733. The second connecting plate 732 extends along the second direction. The second dust suction hood 731 is installed on the second connecting plate 732. The second connecting plate 732 is connected to the mounting base 71 through the second sliding assembly 733. The second sliding assembly 733 is configured to drive the second connecting plate 732 and the second dust suction hood 731 to move relative to the mounting base 71 along the first direction to make the second dust suction hood 731 close to or away from the anti-shake plate 742.

[0200] By setting up the second sliding component 733, the second connecting plate 732 and the second dust hood 731 can be driven to move along the first direction so that the second dust hood 731 is moved away from the anti-shake plate 742 and close to the anti-shake plate 742. Before pulling out the partition 741, the second dust hood 731 can be moved away from the partition 741 first, so as not to affect the movement of the partition 741, which is convenient for use.

[0201] In a preferred embodiment, please refer to Figures 13 to 15 at the same time. The second sliding assembly 733 includes a second driving member 7331 (for example, a pneumatic cylinder or an electric cylinder), a second linear guide rail 7332 and a second guide rail slider 7333. The second linear guide rail 7332 is installed on the mounting seat 71 and extends along the first direction. The second guide rail slider 7333 is slidingly connected to the second linear guide rail 7332 and can slide along the length direction of the second linear guide rail 7332. The second guide rail slider 7333 is connected to the second connecting plate 732. The second driving member 7331 is installed on the mounting seat 71 and connected to the second connecting plate 732. The second driving member 7331 can drive the second connecting plate 732 to move relative to the mounting seat 71 along the first direction.

[0202] The second sliding assembly 733 is configured to include a second driving member 7331 , a second linear guide rail 7332 and a second guide rail slider 7333 , which has a simple structure and is easy to assemble and use.

[0203] Although the second sliding assembly 733 is set as the second driving member 7331, the second linear guide rail 7332 and the second guide rail slider 7333 in the above embodiment, this should not limit the scope of protection of this application. In actual applications, those skilled in the art can set the specific structure of the second sliding assembly 733 according to actual needs. For example, the second sliding assembly 733 can also be set to a structural form in which the second motor is matched with the second ball screw. Such adjustments and changes to the specific structure of the second sliding assembly 733 do not deviate from the basic principles of this application and should be limited to the scope of protection of this application. Of course, it is preferred to set the second sliding assembly 733 as the second driving member 7331, the second linear guide rail 7332 and the second guide rail slider 7333, which has a simple structure, is easy to assemble and use, and has a small size.

[0204] In a preferred embodiment, there are two second sliding assemblies 733, and the two second sliding assemblies 733 are spaced apart along the second direction. The two second sliding assemblies 733 are arranged to simultaneously drive the second connecting plate 732 to move at two positions, thereby ensuring stable movement of the second connecting plate 732.

[0205] In a preferred embodiment, referring to Figures 13 and 14 , the second dust collection mechanism 73 further includes a second limiting assembly 735. The second limiting assembly 735 is capable of limiting the position of the second connecting plate 732 during its movement along the first direction toward the first dust collection hood 721. The second limiting assembly 735 is provided to limit the position of the second connecting plate 732 to prevent excessive movement of the second connecting plate 732, thereby facilitating the positioning of the second dust collection hood 731 in the operating position.

[0206] Exemplarily, the second limiting assembly 735 includes a second limiting column and a second limiting plate, the second limiting plate is installed on the mounting seat 71, the second limiting column is installed on the second connecting plate 732, and is arranged toward the second limiting plate, the second limiting column is located on the side of the second limiting plate away from the first dust hood 721, and after the second limiting column abuts against the second limiting plate, it can limit the second limiting plate from continuing to move toward the first dust hood 721.

[0207] In a preferred embodiment, please refer to Figure 8 and Figures 13 to 15 at the same time. The second dust suction mechanism 73 also includes a pole piece guide rod 734. The pole piece guide rod 734 is installed on the second connecting plate 732 and is located above the partition 741. The pole piece guide rod 734 and the second dust suction cover 731 are respectively located on both sides of the pole piece.

[0208] By setting up the pole piece guide rod 734, when the partition 741 needs to be pulled out for maintenance, the pole piece guide rod 734 can move away from the first dust cover 721 along with the second connecting plate 732, so that the pole piece is away from the anti-shake plate 742, which can avoid the anti-shake plate 742 from causing damage to the pole piece when it is pulled out along with the partition 741, thereby protecting the pole piece.

[0209] In a preferred embodiment, referring to FIG. 11 , the second dust collecting mechanism 3 further includes a second spacing adjustment component 36 , and the second dust collecting hood 31 is connected to the second connecting plate 32 via the second spacing adjustment component 36 , and the second spacing adjustment component 36 is configured to be able to adjust the spacing between two adjacent second dust collecting hoods 31 .

[0210] A second spacing adjustment component 736 is further provided to adjust the spacing between two adjacent second dust hoods 731, so that the second dust collection mechanism 73 can be suitable for cutting pole pieces of different widths, making the dust collection device more convenient to use and suitable for a variety of usage scenarios.

[0211] In a preferred embodiment, the second dust collection cover 731 in the middle of the second dust collection mechanism 73 is fixed relative to the second connecting plate 732. The position of the second dust collection cover 731 in the middle is fixed, and when adjusting the distance between two adjacent second dust collection covers 731, the second dust collection cover 731 in the middle is used as a reference for adjustment, which facilitates adjustment operation, positioning, and calculation.

[0212] In a preferred embodiment, referring to FIG. 13 , the second spacing adjustment assembly 736 includes a fourth linear guide rail 7361 , a plurality of fourth guide rail sliders 7362 , a plurality of second fixing brackets 7363 , and a plurality of equal-width blocks 7364 of the same size.

[0213] The fourth linear guide rail 7361 is installed on the second connecting plate 732 and extends along the second direction. Multiple fourth guide rail sliders 7362 are respectively installed on multiple second fixed frames 7363, and the fourth guide rail sliders 7362 are slidably connected to the fourth linear guide rail 7361 and can move along the length direction of the fourth linear guide rail 7361; the second dust hood 731 is installed on the second fixed frame 7363, and along the second direction, the second fixed frame 7363 located in the middle position is relatively fixed to the second connecting plate 732, and the two adjacent second fixed frames 7363 are connected by an equal-width block 7364 so that the distance between the two adjacent second fixed frames 7363 is the same.

[0214] The second spacing adjustment assembly 736 is configured as a fourth linear guide 7361, a plurality of fourth guide rail sliders 7362, a plurality of second fixing brackets 7363, and a plurality of uniform width blocks 7364 of the same size. Its structure is simple, easy to assemble and use, and low in cost. When the spacing between two adjacent second dust hoods 731 needs to be adjusted, the uniform width blocks 7364 can be simply replaced with uniform width blocks 7364 of different lengths, making the adjustment convenient.

[0215] In other embodiments, the second spacing adjustment assembly 736 includes a second linear motor, which includes a second stator and a plurality of second movers cooperating with the second stator. The second stator is mounted on the second connecting plate 732 and extends along the second direction. The plurality of second dust hoods 731 are respectively mounted on the plurality of second movers, thereby enabling electric adjustment.

[0216] It should be noted that this application does not impose any restrictions on the specific structure of the second spacing adjustment component 736. In actual applications, those skilled in the art can customize the specific structure of the second spacing adjustment component 736 according to actual needs. The specific implementation of the second spacing adjustment component 736 in the above embodiment should not limit the scope of protection of this application.

[0217] In a preferred embodiment, please continue to refer to Figures 16 and 17. The anti-shake mechanism 74 also includes a third spacing adjustment component 744. The anti-shake plate 742 is connected to the partition 741 through the third spacing adjustment component 744. The third spacing adjustment component 744 is configured to adjust the spacing between two adjacent anti-shake plates 742.

[0218] In a preferred embodiment, the anti-shake plate 742 located in the middle of the anti-shake mechanism 74 is fixed relative to the partition plate 741. The position of the anti-shake plate 742 located in the middle is fixed, and when adjusting the distance between two adjacent anti-shake plates 742, the anti-shake plate 742 located in the middle is used as a reference for adjustment, which facilitates the adjustment operation.

[0219] In a preferred embodiment, referring to Figures 16 and 17, the third spacing adjustment assembly 744 includes a limit member 7441 and a locking bolt (not shown in the figure), the limit member 7441 is installed on the partition 741 and extends along the second direction, and a limiting surface is formed on the side of the limit member 7441 close to the anti-shake plate 742, and the anti-shake plate 742 abuts against the limiting surface. A second elongated groove 7413 extending along the second direction is provided on the partition 741, and the locking bolt passes through the second elongated groove 7413 and is threadedly connected to the anti-shake plate 742.

[0220] The third spacing adjustment assembly 744 is configured as a stopper 7441 and a locking bolt, which has a simple structure, is easy to assemble and use, and is low-cost. When adjustment is required, the anti-shake plate 742 is moved along the stopper surface to change the position of the locking bolt within the second elongated circular groove 7413, and the locking bolt is then tightened, making adjustment convenient.

[0221] Illustratively, the limiting member 7441 is a limiting plate extending along the second direction, and forms a limiting surface close to a side surface of the anti-shake plate 742 .

[0222] Illustratively, the limiting member 7441 is a plurality of limiting posts spaced apart along the second direction, and end surfaces of the plurality of limiting posts close to one end of the anti-shake plate 742 jointly form a limiting surface.

[0223] In a preferred embodiment, referring to Figures 16 and 17, the third spacing adjustment assembly 744 also includes a second ruler 7442, which is installed on the partition 741 and extends along the second direction. The second ruler 7442 is located on the side of the anti-shake plate 742 away from the limit member 7441, and a second reading mark 7423 is provided on the anti-shake plate 742. The second reading mark 7423 is set corresponding to the scale value of the second ruler 7442.

[0224] The second reading mark 7423 and the second scale 7442 are set, and the position of the anti-shake plate 742 can be determined by the scale value of the second scale 7442 corresponding to the second reading mark 7423, so as to judge whether the anti-shake plate 742 is adjusted in place, which is more convenient to use.

[0225] 2. Second Aspect

[0226] In the second aspect, the present application also provides a control method for a first pole piece cutting system to better control the pole piece cutting system to cut the pole piece. The control method for the pole piece cutting system is applicable to the pole piece cutting systems of the above-mentioned embodiments 1, 3, 4 and 5.

[0227] Specifically, referring to FIG18 , the control method of the electrode slitting system of the present application includes the following steps:

[0228] S1: The first detection device 2 detects first electrode piece information and first coating area information of a first side surface of the electrode piece 8 in real time, and transmits the detected information to the first control module.

[0229] Exemplarily, the first detection device 2 is a CCD camera, which captures an image of the first side of the electrode 8, which has first electrode information and first coating area information, and transmits the image to the first control module. The first control module can recognize the image and obtain the first electrode width information, first electrode position information, first coating area width information and first coating area position information in the first electrode information.

[0230] Exemplarily, the first detection device 2 is a line laser sensor, which can measure the distance to different points on a straight line in the width direction of the pole piece 8, and determine the first pole piece information and the first coating area information based on multiple different distances, that is, determine the first pole piece width information, the first pole piece position information, the first coating area width information and the first coating area position information; and transmit the determined information to the first control module.

[0231] S2: The first control module determines a first optimal cutting point of the first side surface of the electrode piece 8 along its width according to the first electrode piece information and the first coating area information.

[0232] Exemplarily, when there is only one laser cutting device 1, there is only one first optimal cutting point, which is the midpoint of the width of the first coating area.

[0233] Exemplarily, when the number of laser cutting devices 1 is 5, the number of first optimal cutting points is 5, and there are three spaced-apart first coating areas on the pole piece 8, wherein the three first optimal cutting points are the midpoints of the width of the three first coating areas, and the two first optimal cutting points are the midpoints of the width of the area between two adjacent first coating areas.

[0234] S3: The first control module obtains the detection time of the first coating area information, the distance from the first detection device 2 to the slitting position, and the tape travel speed of the electrode 8.

[0235] Specifically, the first detection device 2 transmits its detection time (detection time of the first coating area information) to the first control module while transmitting its detection information to the first control module; the distance from the first detection device 2 to the slitting position is a fixed value, which is stored in the first control module; the first control module is communicated with the electrode conveying device and can obtain the tape travel speed of the electrode 8 in real time.

[0236] S4: The first control module determines a first cutting timing corresponding to the first optimal cutting point based on the detection time of the first coating area information, the distance between the first detection device 2 and the slitting position, and the tape running speed of the electrode 8. The first cutting timing is the specific time point when the first optimal cutting point reaches the slitting position.

[0237] Specifically, the first control module can calculate the time required for the first optimal cutting point to reach the cutting position based on the tape speed of the pole piece 8 and the distance from the first detection device 2 to the cutting position, and then add this time to the detection time to obtain the first cutting time corresponding to the first optimal cutting point.

[0238] S5: The laser cutting device 1 controls the laser to move to a first optimal cutting point corresponding to the first cutting timing at the first cutting timing.

[0239] The laser can cut the pole piece 8 at the first optimal cutting point in real time, ensuring that the width of the coating area of ​​each sub-pole piece after cutting is consistent.

[0240] The control method of the present application can adjust the cutting position of the laser in real time, so that the laser can be kept at the first optimal cutting point in real time, thereby ensuring that the width of the coating area of ​​the multiple sub-electrode sheets after cutting is consistent, thereby ensuring the quality and performance of the lithium battery.

[0241] 3. The third aspect

[0242] In the third aspect, the present application also provides a second control method for a pole piece cutting system to better control the pole piece cutting system to cut the pole piece. The control method for the pole piece cutting system is applicable to the pole piece cutting systems of the above-mentioned embodiments 2, 3, 4 and 5.

[0243] Specifically, referring to FIG19 , the control method of the electrode cutting system of the present application includes the following steps:

[0244] S1: The first detection device 2 detects first electrode piece information and first coating area information of a first side surface of the electrode piece 8 in real time, and transmits the detected information to the first control module.

[0245] Exemplarily, the first detection device 2 is a CCD camera, which captures an image of the first side of the electrode 8, which has first electrode information and first coating area information, and transmits the image to the first control module. The first control module can recognize the image and obtain the first electrode width information, first electrode position information, first coating area width information and first coating area position information in the first electrode information.

[0246] Exemplarily, the first detection device 2 is a line laser sensor, which can measure the distance to different points on a straight line in the width direction of the pole piece 8, and determine the first pole piece information and the first coating area information based on multiple different distances, that is, determine the first pole piece width information, the first pole piece position information, the first coating area width information and the first coating area position information; and transmit the determined information to the first control module.

[0247] S2: The first control module determines a first optimal cutting point of the first side surface of the electrode piece 8 on its width according to the first electrode piece information and the first coating area information.

[0248] Exemplarily, when there is only one laser cutting device 1, there is only one first optimal cutting point, which is the midpoint of the width of the first coating area.

[0249] Exemplarily, when the number of laser cutting devices 1 is 5, the number of first optimal cutting points is 5, and there are three spaced-apart first coating areas on the pole piece 8, wherein the three first optimal cutting points are the midpoints of the width of the three first coating areas, and the two first optimal cutting points are the midpoints of the width of the area between two adjacent first coating areas.

[0250] S3: The first control module obtains the detection time of the first coating area information, the distance from the first detection device 2 to the slitting position, and the tape travel speed of the electrode 8.

[0251] Specifically, the first detection device 2 transmits its detected information to the first control module and simultaneously transmits its detection time (detection time of the first coating area information) to the first control module; the distance from the first detection device 2 to the slitting position is a fixed value, which is stored in the first control module; the first control module is communicated with the electrode conveying device and can obtain the tape travel speed of the electrode 8 in real time.

[0252] S4: The first control module determines a first cutting timing corresponding to the first optimal cutting point based on the detection time of the first coating area information, the distance between the first detection device 2 and the slitting position, and the tape running speed of the electrode 8. The first cutting timing is the specific time point when the first optimal cutting point reaches the slitting position.

[0253] Specifically, the first control module can calculate the time required for the first optimal cutting point to reach the cutting position based on the tape speed of the pole piece 8 and the distance from the first detection device 2 to the cutting position, and then add this time to the detection time to obtain the first cutting time corresponding to the first optimal cutting point.

[0254] S5: The second detection device 3 detects the second electrode piece information and the second coating area information of the second side surface of the electrode piece 8 in real time, and transmits the detected information to the first control module.

[0255] Exemplarily, the second detection device 3 is a CCD camera, which captures an image of the second side of the electrode 8, which has second electrode information and second coating area information, and transmits the image to the first control module. The first control module can recognize the image and obtain the second electrode width information, second electrode position information, second coating area width information and second coating area position information in the second electrode information.

[0256] Exemplarily, the second detection device 3 is a line laser sensor, which can measure the distance to different points on a straight line in the width direction of the pole piece 8, and determine the second pole piece information and the second coating area information based on multiple different distances, that is, determine the second pole piece width information, the second pole piece position information, the second coating area width information and the second coating area position information; and transmit the determined information to the first control module.

[0257] S6: The first control module determines a second optimal cutting point of the second side surface of the electrode piece 8 on its width according to the second electrode piece information and the second coating area information.

[0258] For example, when there is only one laser cutting device 1 , there is only one second optimal cutting point, which is the midpoint of the width of the second coating area.

[0259] Exemplarily, when the number of laser cutting devices 1 is 5, the number of second optimal cutting points is 5, and there are three spaced-apart second coating areas on the pole piece 8, wherein the three second optimal cutting points are the midpoints of the width of the three second coating areas, and the two second optimal cutting points are the midpoints of the width of the area between two adjacent second coating areas.

[0260] S7: The first control module obtains the detection time of the second coating area information, the distance from the second detection device 3 to the slitting position, and the tape travel speed of the electrode 8.

[0261] Specifically, the second detection device 3 transmits its detected information to the first control module and simultaneously transmits its detection time (detection time of the second coating area information) to the first control module; the distance from the second detection device 3 to the slitting position is a fixed value, which is stored in the first control module; the first control module is communicated with the electrode conveying device and can obtain the tape travel speed of the electrode 8 in real time.

[0262] S8: The first control module determines a second cutting timing corresponding to the second optimal cutting point based on the detection time of the second coating area information, the distance between the second detection device 3 and the slitting position, and the tape running speed of the electrode 8. The second cutting timing is the specific time point when the second optimal cutting point reaches the slitting position.

[0263] Specifically, the first control module can calculate the time required for the second optimal cutting point to reach the cutting position based on the tape speed of the pole piece 8 and the distance from the second detection device 3 to the cutting position, and then add this time to the detection time to obtain the second cutting time corresponding to the second optimal cutting point.

[0264] S9: The first control module determines a third optimal cutting point corresponding to a third cutting opportunity based on the first optimal cutting point and the second optimal cutting point corresponding to the first cutting opportunity and the second cutting opportunity at the same moment, respectively. The third cutting opportunity is the first cutting opportunity and the second cutting opportunity at the same moment, and the third optimal cutting point is the midpoint of a line connecting the first optimal cutting point corresponding to the first cutting opportunity and the second optimal cutting point corresponding to the second cutting opportunity at the same moment.

[0265] S10: The laser cutting device 1 controls the laser to move to a third optimal cutting point corresponding to the third cutting timing at the third cutting timing.

[0266] The laser can cut the several pieces at the third optimal cutting point in real time, ensuring that the width of the coating area of ​​each sub-electrode piece after cutting is consistent.

[0267] The control method of the present application can adjust the cutting position of the laser in real time, so that the laser can be kept at the third optimal cutting point in real time, thereby ensuring that the width of the coating area of ​​the multiple sub-electrode sheets after cutting is consistent, thereby ensuring the consistency of the capacity of the lithium battery, avoiding secondary cutting of the electrode sheets, and reducing material waste.

[0268] In addition, it should be noted that the order of steps in the above-mentioned control method only represents the order of description and does not limit its execution order. During the specific execution process, please refer to Figure 16. Step S1 and step S5 are executed synchronously, and step S9 is executed after step S4 and step S8 are executed. Steps S1 to S4 are executed in sequence, and steps S5 to S8 are executed in sequence.

[0269] 4. The fourth aspect

[0270] In the fourth aspect, the present application provides a third control method for a pole piece cutting system, wherein, please refer to Figure 18, the pole piece cutting system includes a visual device 1, a laser cutting device 2, a tape detection device 3 and a processor (not shown in the figure).

[0271] Among them, the processor is communicatively connected with the visual device 1, the laser cutting device 2 and the tape detection device 3. The processor can receive signals from each device and can transmit control signals to each device so as to control the operation of each device, and the processor is configured to be able to execute the control method of this application.

[0272] The laser cutting device 2 is configured to emit a laser to cut the electrode piece (not marked in the figure) brought to the cutting position. The laser cutting device 2 is also configured to control the laser it emits to move along the width direction of the electrode piece so as to change the position of the cutting point. The laser cutting device 2 can control the laser it emits to move along the width direction of the electrode piece, thereby changing the position of the laser cutting point and further controlling the width of the electrode piece after cutting.

[0273] The visual device 1 is located upstream of the cutting position and is used to obtain image information of the pole piece on the tape. The visual device 1 is set upstream of the cutting position to obtain image information of the pole piece on the tape, so as to determine the position of the optimal cutting point based on the image information, thereby facilitating the laser cutting device 2 to control the laser to move to the position of the optimal cutting point for cutting. The visual device 1 is used as a feedforward detection mechanism to obtain image information of the pole piece and determine the cutting position of the laser before cutting, so that the laser can cut the pole piece at the optimal cutting point during cutting, effectively ensuring the slitting accuracy, improving the hysteresis of the feedback, and being able to adjust the slitting position in time to ensure the product yield.

[0274] The tape running detection device 3 is configured to detect the tape running information of the electrode. The tape running detection device 3 is configured to detect the tape running information of the electrode in real time, so that the acquisition time of the image information can be matched with the tape running information, thereby facilitating and accurately determining the cutting timing of the optimal cutting point, thereby improving the slitting accuracy of the electrode and avoiding the situation where the optimal cutting point and the cutting timing do not match and cause slitting errors.

[0275] The electrode slitting system of the present application detects the image information of the electrode by setting a visual device 1 upstream of the cutting position, and detects the tape running information of the electrode by setting a tape running detection device 3, so that the optimal cutting point and the cutting timing corresponding to the optimal cutting point of a specific area of ​​the electrode can be determined before the tape is run to the cutting position, so that the laser cutting device 2 controls the laser to move to the optimal cutting point at the optimal cutting timing, ensuring that the laser cuts at the optimal cutting point, thereby improving the slitting accuracy and ensuring the yield of the electrode after slitting.

[0276] It should be noted that this application does not impose any restrictions on the specific structure of the laser cutting device 2 and the adjustment method for adjusting the laser position. In actual applications, those skilled in the art can set the specific structure of the laser cutting device 2 and the adjustment method for adjusting the laser position according to actual needs. For example, the laser cutting device 2 includes a laser generator, a galvanometer and a field mirror. The laser light emitted by the laser generator passes through the galvanometer and the field mirror in sequence and then irradiates toward the pole piece, so that the position of the laser light in the width direction of the pole piece can be adjusted by the galvanometer; or the laser cutting device 2 includes a moving mechanism, a laser generator and a field mirror. The laser generator and the field mirror are both connected to the moving mechanism, and the field mirror is relatively fixed to the laser generator. The laser light emitted by the laser generator passes through the field mirror and irradiates toward the pole piece. The moving mechanism is configured to drive the laser generator and the field mirror to move along the width direction of the pole piece, so that the position of the laser light in the width direction of the pole piece is adjusted by driving the laser generator to move by the moving mechanism; and so on. Such adjustments and changes to the specific structure of the laser cutting device 2 do not deviate from the basic principles of this application and should be limited to the scope of protection of this application.

[0277] It should also be noted that the present application does not impose any restrictions on the number of laser cutting devices 2. In actual applications, technical personnel in this field can set the specific number of laser cutting devices 2 according to actual needs. Adjustments and changes to the specific number of laser cutting devices 2 do not deviate from the basic principles of the present application and should be limited to the scope of protection of the present application.

[0278] Exemplarily, the number of the laser cutting device 2 is one, and the number of the optimal cutting point is also one. In this case, the wide electrode piece is cut into two narrow electrode pieces.

[0279] Exemplarily, the number of laser cutting devices 2 is 5, and the number of optimal cutting points is also 5. The 5 laser cutting devices 2 are spaced apart along the width direction of the pole piece, and each corresponds to an optimal cutting point. In this case, the wide pole piece is divided into 6 narrow pole pieces.

[0280] In one specific embodiment, the visual device 1 includes a first visual device 11, which is positioned facing the front or back of the electrode to obtain image information of the front or back of the electrode during tape transport. By providing a visual device 1 to obtain image information of the front or back of the electrode, the optimal cutting point can be determined solely based on the image information of the front or back of the electrode. This determination process is simple and has a fast response speed. This embodiment is suitable for electrodes coated on one side and electrodes with the front and back coating areas facing each other.

[0281] In another specific embodiment, the visual device 1 includes a first visual device 11 and a second visual device 12. The first visual device 11 is arranged opposite to the first side of the electrode to obtain first image information of the first side (front side) of the electrode being carried, and the second visual device 12 is arranged opposite to the second side of the electrode to obtain second image information of the second side (back side) of the electrode being carried. Two visual devices 1 are arranged, namely the first visual device 11 and the second visual device 12, which respectively obtain the first image information of the front side and the second image information of the back side of the electrode, so as to determine the optimal cutting point by using the first image information of the front side and the second image information of the back side. The position of the optimal cutting point determined by this setting method is more accurate, so as to ensure that the width of the coating area of ​​the narrow electrode after slitting is the same and the area of ​​the coating area is consistent, which can better improve the accuracy of slitting. This embodiment is suitable for electrodes with coating areas on the front and back sides, especially electrodes with slightly misaligned coating positions of the coating areas on the front and back sides.

[0282] In addition, the visual device 1 is set upstream of the cutting position and has a certain distance between it and the cutting position, so as to give the processor enough reaction and calculation time, ensure sufficient feedback time, avoid signal delay, and further improve accuracy.

[0283] Specifically, in practical applications, the first vision device 11 and the second vision device 12 may be an area array camera, a CIS, a line scan camera, etc. Those skilled in the art may customize the specific structures of the first vision device 11 and the second vision device 12 based on actual needs. Adjustments and changes to the specific structures of the first vision device 11 and the second vision device 12 do not deviate from the basic principles of this application and are therefore within the scope of protection of this application.

[0284] In a preferred embodiment, the tape-walking detection device 3 includes a main drive traction mechanism and an encoder. The main drive traction mechanism includes an active roller, a passive clamping roller, and a motor. The motor and the encoder are both communicatively connected to the processor.

[0285] The motor is connected to the active roller and can drive the active roller to rotate. The encoder is installed on the active roller and can detect the rotation data of the active roller to obtain the pole piece's tape running information. There is a gap between the passive roller and the active roller, and the pole piece is located in this gap. The passive roller contacts the active roller through the pole piece. When the active roller rotates, it can drive the pole piece to move and drive the passive roller to rotate synchronously. The pole piece's tape running information includes the pole piece's tape running speed, the pole piece's tape running time, and the pole piece's tape running length.

[0286] The tape-feeding detection device 3 is set as a main drive traction mechanism and an encoder. The main drive traction mechanism can cut off the tension of the pole piece, avoid the pole piece being controlled by tension in the cutting area, improve the slitting effect, and make the pole piece run at the set speed. The encoder detects the tape-feeding information of the pole piece in real time, which can ensure that the acquired image information, the feedback signal and the cutting timing match, thereby improving the slitting accuracy.

[0287] Although an encoder is provided in the above embodiment to detect and record the pole piece's tape travel information, this should not limit the scope of protection of this application. In actual applications, the encoder can be replaced with other devices, or the tape travel detection device 3 can be replaced with other devices capable of detecting pole piece tape travel information. For example, the encoder can be replaced with a speed meter. Such adjustments and changes to the specific structure of the tape travel detection device 3 do not deviate from the basic principles of this application and should be limited to the scope of protection of this application.

[0288] In a further preferred embodiment, the tape running detection device 3 is located between the visual device 1 and the cutting position. Placing the tape running detection device 3 between the visual device 1 and the cutting position can better control the tape running of the pole piece between the front and rear areas of the cutting position at a preset speed, thereby better grasping the cutting timing of the optimal cutting point.

[0289] In a preferred embodiment, please continue to refer to FIG20 , the electrode slitting system of the present application further includes a material head detection device 4 (for example: a distance sensor) and a hardware cutting device 5, the material head detection device 4 is used to detect the material head area of ​​the electrode, and the hardware cutting device 5 is configured to be able to move between a standby position and a filler position, and to be able to cut the material head area of ​​the electrode being fed at the filler position, and the filler position is located downstream of the cutting position. Among them, the standby position is a position where the hardware cutting device 5 is away from the electrode, at which position the hardware cutting device 5 is separated from the electrode and cannot cut the electrode, and the filler position is a position where the hardware cutting device 5 is in contact with the electrode and can cut the electrode.

[0290] The electrode head is usually pasted with tape to glue the ends of the two electrode sheets together, thereby connecting the two electrode sheets into a continuous electrode sheet. The area on the electrode sheet where the tape is pasted is the electrode head area. In the process of cutting the electrode sheet by the laser cutting device 2, the laser energy is too large, which easily causes burrs and unevenness on the edges of the cut electrode sheet. Therefore, the laser energy is generally controlled within a certain range to ensure the yield of the electrode sheet after slitting. However, the electrode head area is not easily cut through when laser cutting is used, thereby failing to completely separate the two adjacent electrode sheets after slitting. By setting up a hardware cutting device 5, the electrode head area can be cut, thereby cutting through the electrode head area and improving the slitting quality. The electrode head detection device 4 is used to detect the position of the electrode head area, so as to determine the time when the electrode head area reaches the filler position of the hardware cutting device 5, thereby facilitating the control of the hardware cutting device 5 to move to the filler position at the filler time, so as to cut the electrode, thereby completely cutting through the electrode head area, thereby ensuring the slitting effect of the electrode slitting system.

[0291] It should be noted that this application does not impose any limitations on the specific structure of the metal cutting device 5. In actual applications, those skilled in the art may customize the specific structure of the metal cutting device 5 based on actual needs. For example, the metal cutting device 5 may include multiple knife holders, metal cutting knives fixed to the knife holders, and a sliding mechanism, with the metal cutting knives positioned toward the pole piece, and the sliding mechanism configured to move the knife holders and the metal cutting knives toward and away from the pole piece. Such adjustments and changes to the specific structure of the metal cutting device 5 do not deviate from the basic principles of this application and are intended to be within the scope of protection of this application.

[0292] It should also be noted that the number of metal cutting knives in the metal cutting device 5 of the present application is the same as that of the laser cutting device 2, and the preset cutting points facing the metal cutting knives are fixed cutting points, which are the equal division points of the pole pieces.

[0293] Specifically, referring to FIG. 21 , the control method of the electrode slitting system of the present application includes the following steps:

[0294] S1: The tape running detection device detects the tape running information of the pole piece in real time.

[0295] The tape running detection device detects the tape running information of the electrode piece so as to accurately determine the cutting time according to the tape running information, wherein the tape running information includes the tape running speed and / or the tape running time and / or the tape running length of the electrode piece.

[0296] S2: The visual device obtains the image information of the electrode once every set parameters.

[0297] The visual device acquires the image information of the pole piece once every set parameters, that is, the visual device acquires the image information of the pole piece intermittently.

[0298] In one embodiment, the image information is image information of one side surface (front or back) of the electrode.

[0299] In another embodiment, the image information includes first image information of the front side of the pole piece and second image information of the back side of the pole piece.

[0300] It should be noted that the present application does not impose any restrictions on the amount of image information. In actual applications, those skilled in the art can set the amount of image information according to the coating conditions of the electrode. The specific implementation form of the above-mentioned embodiment should not constitute a limitation on the scope of protection of the present application.

[0301] S3: Based on the image information, determine the optimal cutting point of the electrode area corresponding to the image information.

[0302] Exemplarily, step S3 specifically includes: S31: identifying image information, determining the width of the pole piece and the edge position of the pole piece; S32: dividing the pole piece into equal parts along the width direction of the pole piece according to the number of cutting widths, and being able to determine the position coordinates of the optimal cutting point of the pole piece area corresponding to the image information in the width direction of the pole piece; S33: along the tape running direction of the pole piece, the position coordinates corresponding to the midpoint of the pole piece area corresponding to the image information are the position coordinates of the optimal cutting point in the length direction of the pole piece, that is, determining the optimal cutting point.

[0303] Exemplarily, step S3 specifically includes: S301: identifying the image, determining the width of the pole piece, the edge position of the pole piece, the width of the coating area, and the edge position of the coating area; S302: dividing the coating area into equal parts and dividing the pole piece between two adjacent coating areas into equal parts, and being able to determine the position coordinates of the optimal cutting point of the pole piece area corresponding to the image information in the width direction of the pole piece; S303: along the tape running direction of the pole piece, the midpoint of the pole piece area corresponding to the image information is the position coordinates of the optimal cutting point in the length direction of the pole piece, that is, determining the optimal cutting point.

[0304] It should be noted that the present application does not impose any restrictions on the specific execution steps of step S3. In actual applications, those skilled in the art can set the specific execution steps of step S3 according to actual needs. The specific implementation form of step S3 in the above exemplary description should not constitute a limitation on the scope of protection of the present application.

[0305] S4: Based on the tape transport information and the distance from the visual device to the cutting position, determine the cutting timing corresponding to the optimal cutting point.

[0306] Exemplarily, step S4 specifically includes: S41: determining the preset time required for the optimal cutting point to reach the cutting position based on the tape speed and the distance from the visual device to the cutting position; S42: adding the preset time to the detection time of the image information corresponding to the optimal cutting point to obtain the cutting timing corresponding to the optimal cutting point.

[0307] Exemplarily, step S4 specifically includes: S401: calculating a first length difference between the current tape length and the tape length corresponding to when the image information is detected; S402: calculating a second length difference between the distance from the visual device to the cutting position and the first length difference; S403: judging whether the second length difference is equal to 0. When the second length difference is equal to 0, the current moment is the cutting time corresponding to the optimal cutting point.

[0308] It should be noted that the present application does not impose any restrictions on the specific execution steps of step S4. In actual applications, those skilled in the art can set the specific execution steps of step S4 according to actual needs. The specific implementation forms in the above exemplary descriptions should not constitute limitations on the scope of protection of the present application.

[0309] S5: The laser cutting device 1 controls the laser to move to the optimal cutting point corresponding to the cutting timing at the cutting timing.

[0310] The control method of the present application determines the optimal cutting point of the electrode and the cutting timing corresponding to the optimal cutting point every time the parameters are set during the electrode tape conveying process, so that when the optimal cutting point moves to the cutting position (that is, when the cutting timing corresponding to the optimal cutting point is reached), the laser cutting device 1 controls the laser to move to the optimal cutting point and cuts the electrode at the optimal cutting point, thereby ensuring the cutting accuracy, and then ensuring that the electrode has a consistent width after cutting, thereby improving the performance of the lithium battery.

[0311] In a preferred embodiment, the set parameter is a set tape length; and the step of "the visual device acquiring image information of the electrode piece at intervals of the set parameter" specifically includes: the visual device acquiring image information of the electrode piece at intervals of the set tape length. Acquiring image information of the electrode piece at intervals of the set tape length allows for convenient control by triggering the visual device to acquire image information of the electrode piece at a fixed frequency. Specifically, in practical applications, an encoder of a tape detection device can be used to trigger the acquisition signal of the electrode piece, so that the acquisition node of the visual device matches the tape speed, thereby improving the accuracy of determining the cutting timing.

[0312] In another embodiment, the set parameter is a set time; and the step of "the visual device acquiring the image information of the electrode piece once every set parameter" specifically includes: the visual device acquiring the image information of the electrode piece once every set time. Acquiring the image information of the electrode piece once every fixed time, triggering the visual device to acquire the image information of the electrode piece at a fixed frequency, facilitates control.

[0313] The following five embodiments (embodiments 6-10) are used to describe in detail the control method of the third pole piece cutting system of the present application.

[0314] Example 6

[0315] The control method of the pole piece cutting system of this embodiment is applicable to a pole piece cutting system in which the visual device only includes a first visual device, wherein the first visual device is arranged toward the first side (front side) or the second side (back side) of the pole piece so as to obtain image information of the front side or the back side of the pole piece.

[0316] Please refer to FIG22 , the control method of the electrode cutting system of this embodiment includes the following steps:

[0317] S1: The tape running detection device detects the tape running information of the pole piece in real time.

[0318] The tape running information includes the tape running length of the pole piece and / or the tape running speed of the pole piece and / or the tape running time of the pole piece.

[0319] S2: The first visual device obtains image information of the front or back side of the pole piece every set tape running length.

[0320] Among them, the acquisition frequency of the first visual device can be triggered by the tape detection device. When the tape detection device detects that the pole piece has traveled a set tape length, it sends a signal to the processor. The processor transmits the signal to the first visual device. After receiving the signal, the first visual device shoots the pole piece to obtain image information of the pole piece.

[0321] Exemplarily, the encoder outputs a signal every time the motor and the active roller of the main drive traction mechanism rotate through a specific angle.

[0322] S3: Based on the image information, determine the optimal cutting point of the electrode area corresponding to the image information.

[0323] In a specific embodiment, please continue to refer to FIG. 22 , step S3 specifically includes:

[0324] S31: Identify image information, determine the edge position of the electrode piece, the width of the electrode piece, the edge position of the coating area, and the width of the coating area.

[0325] S32: Based on the edge position of the electrode piece, the width of the electrode piece, the edge position of the coating area, and the width of the coating area, determine the optimal cutting point of the electrode piece area corresponding to the image information.

[0326] Exemplarily, in the case where there is only one coating area in the width direction of the pole piece, there is only one optimal cutting point for each image, and the position coordinates of the optimal cutting point in the width direction of the pole piece are the position coordinates corresponding to the midpoint of the coating area in the width direction, and the position coordinates of the optimal cutting point in the length direction of the pole piece are the position coordinates corresponding to the midpoint of the pole piece area corresponding to the image information in the length direction.

[0327] Exemplarily, in the case where there are N coating areas in the width direction of the pole piece, each image has 2N-1 optimal cutting points, and the 2N-1 optimal cutting points are spaced apart along the width direction of the pole piece, and the position coordinates of the optimal cutting points in the width direction of the pole piece are the position coordinates corresponding to the midpoints of the N coating areas in the width direction and the midpoint of the pole piece between two adjacent coating areas in the width direction, respectively. The position coordinates of the optimal cutting points in the length direction of the pole piece are the position coordinates corresponding to the midpoint of the pole piece area corresponding to the image information in the length direction.

[0328] S4: Determine a cutting timing corresponding to an optimal cutting point based on the tape transport information and the distance from the first vision device to the cutting position.

[0329] S5: The laser cutting device 1 controls the laser to move to the optimal cutting point corresponding to the cutting timing at the cutting timing.

[0330] In a specific embodiment, the tape running information includes the tape running speed. Step S4 of "determining the cutting timing corresponding to the optimal cutting point based on the tape running information and the distance from the first visual device to the cutting position" specifically includes:

[0331] S41: Based on the tape travel speed and the distance from the first vision device to the cutting position, determine the preset time required for the optimal cutting point to reach the cutting position.

[0332] Specifically, the distance from the first visual device to the cutting position divided by the tape speed is the preset time required for the optimal cutting point to reach the cutting position.

[0333] S42: Add the preset time to the detection time of the image information corresponding to the optimal cutting point to obtain the cutting timing corresponding to the optimal cutting point.

[0334] In another specific embodiment, the tape running information includes the tape running speed and the tape running time. Step S4 of "determining the cutting timing corresponding to the optimal cutting point based on the tape running information and the distance from the first visual device to the cutting position" specifically includes:

[0335] S41: Based on the tape travel speed and the distance from the first vision device to the cutting position, determine the preset time required for the optimal cutting point to reach the cutting position.

[0336] S42: Calculate a first difference between the current tape running time of the electrode and the tape running time corresponding to the detection image information.

[0337] For example, the encoder detects and records the pole piece's tape travel time, tape travel speed, and tape travel length in real time, and the required data (for example, the current tape travel time, the tape travel time during detection) can be directly obtained from the encoder's recorded information.

[0338] S43: Calculating a second difference between the preset time and the first difference.

[0339] S44: Determine whether the second difference is equal to 0. When the second difference is equal to 0, the current moment is the cutting time corresponding to the optimal cutting point.

[0340] It should be noted that this application does not impose any restrictions on the specific method of determining the cutting timing in step S4. In actual applications, those skilled in the art can set the specific execution steps of step S4 according to actual needs. The implementation form of the specific execution steps of step S4 in the above embodiment should not limit the scope of protection of this application.

[0341] Example 7

[0342] The control method of the pole piece cutting system of this embodiment is applicable to a pole piece cutting system in which the visual device includes a first visual device and a second visual device, wherein the first visual device is arranged toward the first side (front side) of the pole piece so as to obtain image information of the front side of the pole piece; and the second visual device is arranged toward the second side (reverse side) of the pole piece so as to obtain image information of the reverse side of the pole piece.

[0343] Referring to FIG. 23 , the control method of the electrode cutting system of this embodiment includes the following steps:

[0344] S1: The tape running detection device detects the tape running information of the pole piece in real time.

[0345] The tape running information includes the tape running length, the tape running speed and the tape running time of the pole piece.

[0346] S21: The first visual device acquires first image information of the first surface of the electrode once every set tape running length.

[0347] Among them, the acquisition frequency of the first visual device can be triggered by the tape detection device. When the tape detection device detects that the pole piece has traveled a set tape length, it sends a signal to the processor. The processor transmits the signal to the first visual device. After receiving the signal, the first visual device shoots the pole piece to obtain image information of the pole piece.

[0348] Exemplarily, the encoder outputs a signal every time the motor and the active roller of the main drive traction mechanism rotate through a specific angle.

[0349] S22: The second visual device acquires second image information of the second surface of the electrode piece every set tape running length.

[0350] Among them, the acquisition frequency of the second visual device can be triggered by the tape detection device. When the tape detection device detects that the pole piece has traveled a set tape length, it sends a signal to the processor. The processor transmits the signal to the first visual device. After receiving the signal, the first visual device shoots the pole piece to obtain image information of the pole piece.

[0351] Exemplarily, the encoder outputs a signal every time the motor and the active roller of the main drive traction mechanism rotate through a specific angle.

[0352] S31: Based on the first image information, determine a first cutting point on the first surface of the electrode area corresponding to the first image information.

[0353] Specifically, please continue to refer to FIG. 23 , step S31 specifically includes:

[0354] S311: Identify first image information, and determine the edge position of the first pole piece, the width of the first pole piece, the edge position of the first coating area, and the width of the first coating area.

[0355] S312: Determine a first cutting point on the first surface of the electrode region corresponding to the first image information based on the edge position of the first electrode, the width of the first electrode, the edge position of the first coating area, and the width of the first coating area.

[0356] Exemplarily, in the case where there is only one coating area in the width direction of the pole piece, there is only one first cutting point in each first image, and the position coordinates of the first cutting point in the width direction of the pole piece are the position coordinates corresponding to the midpoint of the coating area in the width direction, and the position coordinates of the first cutting point in the length direction of the pole piece are the position coordinates corresponding to the midpoint of the pole piece area corresponding to the first image information in the length direction.

[0357] Exemplarily, in the case where there are N coating areas in the width direction of the pole piece, each first image has 2N-1 first cutting points, and the 2N-1 first cutting points are spaced apart along the width direction of the pole piece, and the position coordinates of the first cutting points in the width direction of the pole piece are respectively the position coordinates corresponding to the midpoints of the N coating areas in the width direction and the midpoint of the pole piece between two adjacent coating areas in the width direction, and the position coordinates of the first cutting points in the length direction of the pole piece are the position coordinates corresponding to the midpoint of the pole piece area corresponding to the image information in the length direction.

[0358] S32: Based on the second image information, determine a second cutting point on the second surface of the electrode area corresponding to the second image information.

[0359] Specifically, please continue to refer to FIG. 23 , step S32 specifically includes:

[0360] S321: Identify the second image information, and determine the edge position of the second pole piece, the width of the second pole piece, the edge position of the second coating area, and the width of the second coating area.

[0361] S322: Determine a second cutting point on the second surface of the electrode region corresponding to the second image information based on the edge position of the second electrode, the width of the second electrode, the edge position of the second coating area, and the width of the second coating area.

[0362] Exemplarily, in the case where there is only one coating area in the width direction of the pole piece, there is only one second cutting point in each second image, and the position coordinates of the second cutting point in the width direction of the pole piece are the position coordinates corresponding to the midpoint of the coating area in the width direction, and the position coordinates of the second cutting point in the length direction of the pole piece are the position coordinates corresponding to the midpoint of the pole piece area corresponding to the second image information in the length direction.

[0363] Exemplarily, in the case where there are N coating areas in the width direction of the pole piece, each second image has 2N-1 second cutting points, and the 2N-1 second cutting points are spaced apart along the width direction of the pole piece, and the position coordinates of the second cutting points in the width direction of the pole piece are respectively the position coordinates corresponding to the midpoints of the N coating areas in the width direction and the midpoint of the pole piece between two adjacent coating areas in the width direction, and the position coordinates of the second cutting points in the length direction of the pole piece are the position coordinates corresponding to the midpoint of the pole piece area corresponding to the image information in the length direction.

[0364] S33: Determine the optimal cutting point corresponding to the same pole piece region based on the first cutting point and the second cutting point corresponding to the pole piece region.

[0365] The same electrode area is the same electrode area as the electrode area corresponding to the first image information and the electrode area corresponding to the second image information, and the optimal cutting point is the midpoint of the line connecting the first cutting point and the second cutting point.

[0366] S4: Determine a cutting timing corresponding to an optimal cutting point based on the tape transport information and the distance from the first vision device to the cutting position.

[0367] In another embodiment, step S4 may also be replaced by: determining the cutting timing corresponding to the optimal cutting point based on the tape running information and the distance from the second vision device to the cutting position.

[0368] S5: The laser cutting device 1 controls the laser to move to the optimal cutting point corresponding to the cutting timing at the cutting timing.

[0369] In a specific embodiment, step S4 of "determining the cutting timing corresponding to the optimal cutting point based on the tape running information and the distance from the first visual device to the cutting position" specifically includes:

[0370] S41: Determine a first preset time required for the first cutting point to reach the cutting position based on the tape travel speed and the distance from the first vision device to the cutting position.

[0371] The position of the first visual device is fixed, and the distance from the first visual device to the cutting position is a known parameter, which is stored in the processor and can be obtained at any time.

[0372] Specifically, the distance from the first visual device to the cutting position divided by the tape transport speed is the first preset time.

[0373] S42: Add the first preset time to the detection time of the first image information corresponding to the first cutting point to obtain the cutting timing corresponding to the optimal cutting point determined by the first cutting point.

[0374] In another specific embodiment, step S4 of "determining the cutting timing corresponding to the optimal cutting point based on the tape running information and the distance from the first visual device to the cutting position" specifically includes:

[0375] S41: Determine a first preset time required for the first cutting point to reach the cutting position based on the tape travel speed and the distance from the first vision device to the cutting position.

[0376] S42: Calculate a first difference between the current tape running time of the pole piece and the tape running time corresponding to the detected first image information.

[0377] S43: Calculate a second difference between the first preset time and the first difference.

[0378] S44: Determine whether the second difference is equal to 0. When the second difference is equal to 0, the current moment is the cutting opportunity corresponding to the optimal cutting point determined by the first cutting point.

[0379] In another specific embodiment, step S4 of "determining the cutting timing corresponding to the optimal cutting point based on the tape running information and the distance from the first visual device to the cutting position" specifically includes:

[0380] S41: Calculating a first length difference between the current tape running length and the tape running length corresponding to when the first image information is detected.

[0381] S42: Calculating a second length difference between the distance from the first vision device to the cutting position and the first length difference.

[0382] S43: Determine whether the second length difference is equal to 0. When the second length difference is equal to 0, the current moment is the cutting opportunity corresponding to the optimal cutting point determined by the first cutting point.

[0383] In another specific embodiment, step S4 of "determining the cutting timing corresponding to the optimal cutting point based on the tape running information and the distance from the first visual device to the cutting position" specifically includes:

[0384] S41: Calculating a first time difference between the current tape running time and the tape running time corresponding to when the first image information is detected.

[0385] S42: Calculating the tape travel distance of the first cutting point according to the first time difference and the tape travel speed.

[0386] S43: Determine whether the tape running distance of the first cutting point is equal to the distance from the first visual device to the cutting position. If the judgment result is "yes", the current moment is the cutting time corresponding to the optimal cutting point determined by the first cutting point.

[0387] In a specific embodiment, step S4 of "determining the cutting timing corresponding to the optimal cutting point based on the tape running information and the distance from the second vision device to the cutting position" specifically includes:

[0388] S41: Determine a second preset time required for the second cutting point to reach the cutting position based on the tape travel speed and the distance from the second vision device to the cutting position.

[0389] S42: Add the second preset time to the detection time of the second image information corresponding to the second cutting point to obtain the cutting timing corresponding to the optimal cutting point determined by the second cutting point.

[0390] In another specific embodiment, step S4 of "determining the cutting timing corresponding to the optimal cutting point based on the tape running information and the distance from the second vision device to the cutting position" specifically includes:

[0391] S41: Determine a second preset time required for the second cutting point to reach the cutting position based on the tape travel speed and the distance from the second vision device to the cutting position.

[0392] S42: Calculate a third difference between the current tape running time of the pole piece and the tape running time corresponding to the detected second image information.

[0393] S43: Calculating a fourth difference between the second preset time and the third difference.

[0394] S44: Determine whether the fourth difference is equal to 0. When the fourth difference is equal to 0, the current moment is the cutting opportunity corresponding to the optimal cutting point determined by the second cutting point.

[0395] In another specific embodiment, step S4 of "determining the cutting timing corresponding to the optimal cutting point based on the tape running information and the distance from the second vision device to the cutting position" specifically includes:

[0396] S41: Calculating a third length difference between the current tape running length and the tape running length corresponding to when the second image information is detected.

[0397] S42: Calculating a fourth length difference between the distance from the second vision device to the cutting position and the third length difference.

[0398] S43: Determine whether the fourth length difference is equal to 0. When the fourth length difference is equal to 0, the current moment is the cutting opportunity corresponding to the optimal cutting point determined by the second cutting point.

[0399] In another specific embodiment, step S4 of "determining the cutting timing corresponding to the optimal cutting point based on the tape running information and the distance from the second vision device to the cutting position" specifically includes:

[0400] S41: Calculating a second time difference between the current tape running time and the tape running time corresponding to when the second image information is detected.

[0401] S42: Calculating the tape travel distance of the second cutting point according to the second time difference and the tape travel speed.

[0402] S43: Determine whether the tape running distance of the second cutting point is equal to the distance from the second visual device to the cutting position. If the judgment result is "yes", the current moment is the cutting time corresponding to the optimal cutting point determined by the second cutting point.

[0403] Example 8

[0404] Specifically, referring to FIG. 24 , the control method of the electrode slitting system of this embodiment, based on Embodiment 6 and Embodiment 7, further includes the following steps:

[0405] S61: Determine whether the pole piece on the tape is qualified based on the image information.

[0406] S62: Alarm and shutdown are selectively performed according to the judgment result.

[0407] After acquiring the image information, it is judged in real time whether the electrode on the conveyor belt is qualified based on the image information, so that when the incoming electrode is detected to be unqualified, an alarm and shutdown can be issued in time, and a qualified electrode can be replaced in time to avoid more defective products.

[0408] In a further preferred embodiment, step S61 of "determining whether the electrode piece being transported is qualified based on the image information" specifically includes:

[0409] S611: Identify image information and determine the width of the electrode and the width of the coating area.

[0410] S612: Compare the width of the electrode piece with a first set width.

[0411] S613: Compare the width of the coating area with a second set width.

[0412] S614: Based on the comparison result, determine whether the pole piece of the tape is qualified.

[0413] Specifically, step S614 "determine whether the pole piece on the tape is qualified based on the comparison result" specifically includes: S6141: If the width of the pole piece is equal to the first set width and the width of the coating area is equal to the second set width, then the pole piece on the tape is determined to be qualified; S6142: If the width of the pole piece is not equal to the first set width or the width of the coating area is not equal to the second set width, then the pole piece on the tape is determined to be unqualified.

[0414] In a further preferred embodiment, step S62 of "selectively issuing an alarm and shutting down the machine according to the judgment result" specifically includes:

[0415] S621: If the electrode is judged to be unqualified, an alarm is issued and the machine is shut down.

[0416] S622: If the electrode is judged to be qualified, no alarm is given and the machine is not shut down.

[0417] It should be noted that step S61 is executed after step S2 and is executed synchronously with step S3.

[0418] After acquiring the image information, the control method of the electrode slitting system of this embodiment further determines whether the electrode on the tape is qualified based on the image information. It can determine whether the incoming electrode is qualified, avoid further processing of unqualified electrodes, avoid the occurrence of more defective products, and avoid wasting energy and time.

[0419] Example 9

[0420] Continuing to refer to FIG24 , when the laser emitted by the laser cutting device is cutting the electrode piece, the control method of the electrode piece cutting system of this embodiment further includes the following steps:

[0421] S71: Determine cutting parameters based on tape transport information, wherein the tape transport information includes tape transport speed.

[0422] Determine the corresponding cutting parameters based on the current tape speed.

[0423] For example, the processor stores a table comparing tape speeds to cutting parameters, and can find cutting parameters that match the current tape speed in the table, thereby outputting the cutting parameters to the laser cutting device 1 so that the laser cutting device 1 emits laser light according to the determined cutting parameters. The cutting parameters include, but are not limited to, laser energy.

[0424] S72: Enable the laser cutting device 1 to emit laser according to the cutting parameters.

[0425] During the process of laser cutting the pole piece, the cutting parameters are determined in real time according to the tape running speed so that the laser emitted by the laser cutting device 1 matches the current tape running conditions, thereby ensuring that the pole piece after cutting is free of burrs and other defects.

[0426] It should be noted that steps S71 and S72 can be set to run in real time so that the laser can be adjusted in real time to match the current tape speed; or, steps S71 and S72 can also be set to run intermittently, adjusting the laser once every specific tape length or specific time to reduce the amount of calculation.

[0427] Example 10

[0428] The control method of this embodiment is applicable to the electrode slitting system including the material end detection device 4 and the hardware cutting device 5 .

[0429] Continuing to refer to FIG24 , the control method of the electrode slitting system of this embodiment, based on the embodiment, embodiment 2, embodiment 3 or embodiment 4, further includes the following steps:

[0430] S81: The material end detection device 4 detects the material end area of ​​the electrode in real time and obtains the time information [t1, t2] when the material end area is detected.

[0431] Among them, the time information is a time period, t1 is the starting time point of the time period, specifically the time point when the material head area is just detected; t2 is the ending time point of the time period, specifically the time point when the material head area is just not detected.

[0432] S82: Based on the time information [t1, t2], the tape running information and the distance from the material head detection device 4 to the cutting position, determine the avoidance timing [t3, t4] of the laser cutting device 1.

[0433] Specifically, the avoidance timing is also a time period, within which the material head area passes through the cutting position, t3 is the starting time point of the time period, specifically the time point when the starting end of the material head area reaches the cutting position; t4 is the ending time point of the time period, specifically the time point when the ending end of the material head area reaches the cutting position, and within the time period [t3, t4] the laser cutting device 1 stops emitting laser or moves to the standard cutting point.

[0434] Exemplarily, step S82 specifically includes:

[0435] S821: Based on the tape speed and the distance from the material head detection device 4 to the cutting position, determine the first preset time t required for the head of the material head area to reach the cutting position A .

[0436] Specifically, the distance from the material head detection device 4 to the cutting position divided by the tape speed is the first preset time t required for the head of the material head area to reach the cutting position. A .

[0437] S822: Based on the time information [t1, t2] and the first preset time t A , determine the avoidance timing [t3, t4] of the laser cutting device 1.

[0438] Specifically, t3=t1+t A , t4=t2+t A .

[0439] S83: The laser cutting device 1 stops emitting laser light at the avoidance timing or controls the laser light to move to the standard cutting point at the avoidance timing.

[0440] S84: Determine the timing [t5, t6] of the metal cutting device 5 to make up the cut based on the time information [t1, t2], the tape running information, and the distance from the material head detection device 4 to the make-up cut position.

[0441] Specifically, the timing of the supplementary cut is also a time period. Within the time period [t5, t6], the material head area of ​​the electrode passes through the supplementary cut position. t5 is the starting time point of the time period, specifically the time point when the starting end of the material head area reaches the supplementary cut position; t6 is the ending time point of the time period, specifically the time point when the ending end of the material head area reaches the supplementary cut position, and within the time period [t5, t6], the hardware cutting device 5 is located at the supplementary cut position and cuts the electrode on the tape.

[0442] Exemplarily, step S84 specifically includes:

[0443] S841: Based on the tape speed and the distance from the material head detection device 4 to the filling position, determine the second preset time t required for the head of the material head area to reach the filling position B .

[0444] Specifically, the distance from the material head detection device 4 to the filling position divided by the tape speed is the second preset time t required for the head of the material head area to reach the filling position. B .

[0445] S842: Based on the time information [t1, t2] and the second preset time t B , determine the timing [t5, t6] for the metal cutting device 5 to make up the knife.

[0446] Specifically, t5=t1+t B , t6=t2+t B .

[0447] S85: Move the metal cutting device 5 to the supplementary cutting position at the supplementary cutting opportunity, so that the metal cutting device 5 cuts the material head area.

[0448] By making the laser cutting device 1 stop emitting laser at the avoidance time, it is possible to avoid the different cutting positions of the laser cutting device 1 and the hardware cutting device 5 affecting the winding operation of the electrode after cutting. By making the laser cutting device 1 control the laser to move to the standard cutting point at the avoidance time, the cutting point of the laser cutting device 1 can be made to coincide with the cutting point of the hardware cutting device 5, thereby improving the cutting quality.

[0449] The control method for the electrode of this embodiment detects the material head area of ​​the electrode in real time, and determines the timing of the metal cutting device 5 to make up the knife and the timing of the laser cutting device 1 to avoid according to the detection results and related parameters. It can make the electrode be cut smoothly, ensure that the material head area is cut through, avoid incomplete cutting, and is more convenient to use and easy to control.

[0450] It should be noted that step S81 is executed simultaneously with step S1. When step S83 is executed, step S5 stops executing. In the specific implementation process, step S82 and step S84 can also be executed simultaneously, or step S84 can be executed first and then step S82.

[0451] 5. The fifth aspect

[0452] In a fifth aspect, the present application provides a laser focusing method for a pole piece slitting system, wherein the pole piece slitting system of the present application includes a laser cutting device, a sensor, a pole piece, a mobile device, and a processor. The laser cutting device, the sensor, and the mobile device are all communicatively connected to the processor, and the processor is configured to execute the laser focusing method of the present application.

[0453] The laser cutting device is installed on a moving device, and the laser cutting device is set toward the pole piece. The moving device is configured to drive the laser cutting device to move toward and away from the pole piece to adjust the distance from the laser cutting device to the pole piece. The sensor is used to detect the distance from the laser cutting device to the pole piece.

[0454] It should be noted that this application does not impose any restrictions on the specific structure of the laser cutting device. As long as the laser cutting device can emit laser and cut the pole piece, in actual application, technical personnel in this field can set the structure of the laser cutting device according to actual needs.

[0455] It should also be noted that the present application does not impose any restrictions on the number of laser cutting devices. In actual applications, those skilled in the art can set the number of laser cutting devices according to actual needs (for example, the need to cut the pole piece). For example, the number of laser cutting devices is one, and a wide pole piece can be cut into two narrow pole pieces. For example, the number of laser cutting devices is five, and the five laser cutting devices are distributed in sequence along the width direction of the pole piece, and a wide pole piece can be cut into six narrow pole pieces at the same time. Any adjustments and changes to the number of laser cutting devices that do not deviate from the basic principles of the present application should be limited to the scope of protection of the present application.

[0456] It should also be noted that the present application does not impose any restrictions on the specific structure of the mobile device. As long as the mobile device can drive the laser cutting device to move toward or away from the pole piece, thereby adjusting the distance between the laser cutting device and the pole piece, in actual applications, those skilled in the art can set the specific structure of the mobile device according to actual needs. For example, the mobile device is a linear motor. For example, the mobile device is a sliding module. Such adjustments and changes to the specific structure of the mobile device do not deviate from the basic principles of this application and should be limited to the scope of protection of this application.

[0457] It should also be noted that this application does not impose any restrictions on the specific type of sensor. As long as the sensor can accurately detect the distance from the laser cutting device to the pole piece, in actual applications, those skilled in the art can set the sensor type according to actual needs. For example, the sensor can be an ultrasonic sensor, or a laser sensor, or an infrared sensor, or a millimeter-wave radar sensor, etc. Such adjustments and changes to the sensor type do not deviate from the basic principles of this application and should be limited to the scope of protection of this application.

[0458] Specifically, referring to FIG. 25 , the laser focusing method of the electrode slitting system of the present application specifically includes the following steps:

[0459] S1: Obtain the laser working distance a, the laser cutting floating distance b, and the sensor detection error d.

[0460] The laser working distance a and the laser cutting floating distance b are known data when the laser cutting device leaves the factory. In actual applications, this data is stored in the processor and can be read directly. Its value corresponds to the model of the laser cutting device and the value is fixed.

[0461] The sensor detection error d is known data when the sensor leaves the factory. In practical applications, this data is stored in the processor and can be read directly. Its value corresponds to the sensor model and is fixed.

[0462] S2: Determine the maximum test distance L for the focusing test based on the laser working distance a, the laser cutting floating distance b, and the sensor detection error d. max and minimum test distance L min Among them, L max =a+b+d, L min =abd.

[0463] Although the maximum test distance L max Equal to a+b+d and make the minimum test distance L min =abd, but this does not limit the scope of this application. In practical applications, other factors can be added to calculate L according to actual conditions. max and L min , for example, the maximum test distance L max =a+b+d+x, L min =abdx. This specific calculation method of the maximum test distance and the minimum test distance should not limit the scope of protection of this application.

[0464] S3: The sensor detects the distance c between the laser cutting device and the pole piece in real time.

[0465] The sensor detects the distance c between the laser cutting device and the pole piece in real time, so that the processor controls the moving device to drive the laser cutting device to move and adjust the position of the laser cutting device at any time, so that the distance from the laser cutting device to the pole piece is equal to the required preset distance, which facilitates the automatic adjustment of the position of the laser cutting device and can ensure the accuracy of the adjustment.

[0466] Preferably, the sensor is a distance sensor.

[0467] S4: Adjust the distance c between the laser cutting device and the pole piece, and start the laser cutting device once every set moving distance e, so that the laser cutting device emits laser and cuts a preset feature on the pole piece, where c∈[L min , L max ], each time the distance c from the laser cutting device to the pole piece is adjusted or before the laser cutting device cuts the preset feature, the pole piece is made to travel a preset length l so that the distance between two adjacent preset features to be cut is l.

[0468] A plurality of cutting tests are performed between a maximum test distance and a minimum test distance, with the distance difference between each cutting test being e, thereby cutting out a plurality of preset features, so as to determine an optimal cutting distance based on the plurality of preset features.

[0469] It should be noted that the value of the moving distance e is set according to the actual situation. Generally, the number of cutting times is set to 8 to 10 times to avoid errors caused by inaccurate cutting times, so e=(L max -L min )÷N, where N is the preset number of cuts.

[0470] It should also be noted that the present application does not impose any restrictions on the specific execution steps of step S4. It only needs to cut the preset feature once every set moving distance e. In actual applications, those skilled in the art can set the specific execution steps of step S4 according to actual needs. For example, in step S4, cutting is performed in sequence from the farthest test distance to the closest test distance. For example, in step S4, cutting is performed in sequence from the closest test distance to the farthest test distance. Such adjustments and changes to the specific execution steps of step S4 do not deviate from the basic principles of this application and should be limited to the scope of protection of this application.

[0471] Preferably, the preset feature is a circular hole. Setting the preset feature as a circular hole is easier to identify and judge than setting the preset feature as a straight line; and is more convenient to control cutting than setting the preset feature as a square hole or a hole of other shapes.

[0472] It should also be noted that this application does not make any built-in specific length of the preset length l of the pole piece tape. In actual application, when the preset feature is a circular hole, it is sufficient as long as l is not less than twice the diameter of the circular hole, so that the two adjacent preset features can be separated for easy identification and observation.

[0473] S5: Determine the maximum cutting distance c based on all preset cutting features max and the closest cutting distance c min .

[0474] For example, step S5 is performed by an image recognition module, which recognizes the preset features and determines the maximum cutting distance c according to the recognition result. max and the closest cutting distance c min .

[0475] For example, step S5 is performed manually, the preset features are identified manually, thereby determining the preset features corresponding to the farthest cutting distance and the closest cutting distance, and the preset features are input into the processor, and then the farthest cutting distance c is determined by the processor. max and the closest cutting distance c min .

[0476] It should be noted that this application does not impose any restrictions on the specific execution steps of step S5. In actual applications, those skilled in the art can set the specific execution steps of step S5 according to actual needs. The above exemplary implementation should not limit the scope of protection of this application.

[0477] S6: Based on c max and c min , determine the optimal cutting distance c 焦 Among them, c 焦 =(c max +c min )÷2.

[0478] It should be noted that the optimal cutting distance is the optimal distance from the laser cutting device to the pole piece. At this distance, the laser cutting device can completely cut through the pole piece, thereby ensuring the cutting effect.

[0479] S7: The moving device drives the laser cutting device to move until the distance c between the laser cutting device and the pole piece is equal to the optimal cutting distance c 焦 .

[0480] After determining the optimal cutting distance, move the laser cutting device so that the distance c from the laser cutting device to the pole piece is equal to the optimal cutting distance c. 焦 , to ensure the later cutting effect.

[0481] The laser focusing method of the present application continuously changes the distance from the laser cutting device to the pole piece between the maximum test distance and the minimum test distance, and cuts a preset feature at each position, determines the farthest cutting distance and the closest cutting distance through multiple preset features, and determines the optimal cutting distance based on the farthest cutting distance and the closest cutting distance, thereby determining the position of the laser cutting device relative to the pole piece (i.e., the focal length). Before actual cutting, the laser cutting device is moved to a position where the distance between the laser cutting device and the pole piece is the optimal cutting distance. In addition, the distance c from the laser cutting device to the pole piece is detected in real time by a sensor. The sensor detects the distance in real time, which can ensure that each adjustment of the position of the laser cutting device can be accurate.

[0482] The laser focusing method of the present application controls the operation of the mobile device through a processor to adjust the distance from the laser cutting device to the pole piece, realizes automatic distance adjustment, cutting and recording, and performs recognition based on the preset features after cutting, and determines the preset features with good cutting effect. According to the position of the corresponding preset features and the corresponding distance from the laser cutting device to the pole piece, the optimal cutting distance is determined. When the image recognition module is used for the recognition operation, automatic focusing can be achieved without manual intervention. When manual recognition is used, there is no need for the intervention of multiple people, and one person can complete the recognition operation, with high focusing efficiency and higher accuracy.

[0483] The laser focusing method of the electrode cutting system of the present application is described in detail below through four embodiments (embodiments 11-14).

[0484] Example 11

[0485] Referring to FIG. 26 , the laser focusing method of the electrode cutting system of this embodiment specifically includes the following steps:

[0486] S1: Obtain the laser working distance a, the laser cutting floating distance b, and the sensor detection error d.

[0487] S2: Determine the maximum test distance L for the focusing test based on the laser working distance a, the laser cutting floating distance b, and the sensor detection error d. max and minimum test distance L min , where L max =a+b+d, L min =abd.

[0488] S3: The sensor detects the distance c between the laser cutting device and the pole piece in real time.

[0489] S41: The moving device drives the laser cutting device to move, and the distance c between the laser cutting device and the pole piece is adjusted to c = c1 = L max .

[0490] S42: Start the laser cutting device, so that the laser cutting device emits laser and cuts a preset feature on the pole piece.

[0491] S43: Make the pole piece run with a preset length l.

[0492] S44: The moving device drives the laser cutting device to move again, and moves the laser cutting device toward the pole piece by a set distance e, so that the distance from the laser cutting device to the pole piece is c = c n =L max -(n-1)×e, where n is the number of adjustments of the laser cutting device.

[0493] S45: Start the laser cutting device again, so that the laser cutting device emits laser and cuts a preset feature on the pole piece.

[0494] S46: Repeat steps S43, S44 and S45 until L max -(n-1)×e≤L min Then execute step S5.

[0495] Judge the current c n Is it less than or equal to L? min , that is, L max -(n-1)×e is less than or equal to L min If the judgment result is "yes", execute step S51; if the judgment result is "no", return to step S43 and repeat steps S43 to S45.

[0496] S5: Determine the maximum cutting distance c based on all preset cutting features max and the closest cutting distance c min .

[0497] Specifically, step S5 includes the following steps:

[0498] S51: Identify all preset features of the cutting.

[0499] The recognition process can be performed by an image recognition module. After recognition, the image recognition module feeds back the image to the processor, and the processor processes and analyzes the image to determine the preset features of the cut-through electrode.

[0500] S52: Determine the preset characteristics of the first electrode cut through, and determine the maximum cutting distance c based on the preset characteristics of the first electrode cut through max .

[0501] After determining the first preset feature of cutting through the electrode, locate the position of the preset feature, and then determine the distance from the laser cutting device to the electrode corresponding to the preset feature according to the data recorded during the cutting feature process, which is the farthest cutting distance cmax .

[0502] S53: Determine the preset characteristics of the last electrode cut through, and determine the closest cutting distance c based on the preset characteristics of the last electrode cut through min .

[0503] After determining the last preset feature that cuts through the electrode, locate the position of the preset feature, and then determine the distance from the laser cutting device to the electrode corresponding to the preset feature based on the data recorded during the cutting process, which is the closest cutting distance c. min .

[0504] S6: Based on c max and c min , determine the optimal cutting distance c 焦 Among them, c 焦 =(c max +c min )÷2.

[0505] S7: The moving device drives the laser cutting device to move until the distance c between the laser cutting device and the pole piece is equal to the optimal cutting distance c 焦 .

[0506] Example 12

[0507] Referring to FIG. 27 , the laser focusing method of the electrode slitting system of this embodiment specifically includes the following steps:

[0508] S1: Obtain the laser working distance a, the laser cutting floating distance b, and the sensor detection error d.

[0509] S2: Determine the maximum test distance L for the focusing test based on the laser working distance a, the laser cutting floating distance b, and the sensor detection error d. max and minimum test distance L min , where L max =a+b+d, L min =abd.

[0510] S3: The sensor detects the distance c between the laser cutting device and the pole piece in real time.

[0511] S41: The moving device drives the laser cutting device to move, and the distance c between the laser cutting device and the pole piece is adjusted to c = c1 = L min .

[0512] S42: Start the laser cutting device, so that the laser cutting device emits laser and cuts a preset feature on the pole piece.

[0513] S43: Make the pole piece run with a preset length l.

[0514] S44: The moving device drives the laser cutting device to move again, and moves the laser cutting device away from the pole piece by a set distance e, so that the distance between the laser cutting device and the pole piece is c = c n =L min +(n-1)×e, where n is the number of adjustments of the laser cutting device.

[0515] S45: Start the laser cutting device again, so that the laser cutting device emits laser and cuts a preset feature on the pole piece.

[0516] S46: Repeat steps S43, S44 and S45 until L min +(n-1)×e≥L max Then execute step S5.

[0517] Judge the current c n Is it greater than or equal to L max , that is, L min +(n-1)×e is greater than or equal to L max If the judgment result is "yes", execute step S51; if the judgment result is "no", return to step S43 and repeat steps S43 to S45.

[0518] S5: Determine the maximum cutting distance c based on all preset cutting features max and the closest cutting distance c min .

[0519] Specifically, step S5 includes the following steps:

[0520] S51: Identify all preset features of the cutting.

[0521] The recognition process can be performed by an image recognition module. After recognition, the image recognition module feeds back the image to the processor, and the processor processes and analyzes the image to determine the preset features of the cut-through electrode.

[0522] S52: Determine the preset characteristics of the first cut-through electrode piece, and determine the closest cutting distance c based on the preset characteristics of the first cut-through electrode piece. min .

[0523] After determining the first preset feature of cutting through the electrode, locate the position of the preset feature, and then determine the distance from the laser cutting device to the electrode corresponding to the preset feature according to the data recorded during the cutting feature process, which is the closest cutting distance c. min .

[0524] S53: Determine the preset characteristics of the last electrode cut through, and based on the preset characteristics of the last electrode cut through, determine the maximum cutting distance c max.

[0525] After determining the last preset feature that cuts through the electrode, locate the position of the preset feature, and then determine the distance from the laser cutting device to the electrode corresponding to the preset feature based on the data recorded during the cutting process, which is the farthest cutting distance c max .

[0526] S6: Based on c max and c min , determine the optimal cutting distance c 焦 Among them, c 焦 =(c max +c min )÷2.

[0527] S7: The moving device drives the laser cutting device to move until the distance c between the laser cutting device and the pole piece is equal to the optimal cutting distance c 焦 .

[0528] Example 13

[0529] There are multiple laser cutting devices, each laser cutting device is installed on a mobile device, and multiple laser cutting devices are distributed at equal intervals along the fourth direction. Each laser cutting device is correspondingly provided with a sensor, and the sensor is configured to detect the distance from the corresponding laser cutting device to the pole piece.

[0530] When there are multiple laser cutting devices, a sensor is set corresponding to each laser cutting device. Before use, each laser cutting device is subjected to laser focusing operation separately. Each laser cutting device can perform the focusing operation in accordance with the specific method of Example 11 or Example 12.

[0531] Example 14

[0532] There are multiple laser cutting devices, each laser cutting device is installed on a mobile device, and the multiple laser cutting devices are distributed at equal intervals along the fourth direction, and the projections of the multiple laser cutting devices in the fourth direction overlap. The sensor includes a first sensor and a second sensor. The first sensor is arranged on a laser cutting device located at one end thereof, and the second sensor is arranged on another laser cutting device. The first sensor and the second sensor respectively detect the distance from the corresponding laser cutting device to the pole piece.

[0533] Referring to FIG. 28 , the laser focusing method of the electrode slitting system of this embodiment includes the following steps:

[0534] S1: The first sensor detects the first initial distance c from the corresponding first laser cutting device to the pole piece 1初始 .

[0535] S2: The second sensor detects the nth initial distance c from the corresponding nth laser cutting device to the pole piece n初始 .

[0536] S3: Based on the first initial distance c 1初始 and the nth initial distance c n初始 , determine the distance arithmetic change rate k. Among them,

[0537] S4: Obtain the laser working distance a, the laser cutting floating distance b, and the sensor detection error d.

[0538] S5: Determine the maximum test distance L for the focusing test based on the laser working distance a, the laser cutting floating distance b, and the sensor detection error d. max and minimum test distance L min .

[0539] S6: The first sensor detects the distance c1 between the corresponding first laser cutting device and the pole piece in real time.

[0540] S7: Adjust the distance c1 from the first laser cutting device to the pole piece, and start the first laser cutting device once every set moving distance e, so that the first laser cutting device emits laser and cuts a preset feature on the pole piece, where c1∈[L min , L max ], each time the distance c1 from the first laser cutting device to the pole piece is adjusted or before the first laser cutting device cuts the preset feature, the pole piece is made to travel a preset length l so that the distance between two adjacent preset features to be cut is l.

[0541] Specifically, step S7 of this embodiment may refer to steps S41 to S46 in embodiment 1 and embodiment 2.

[0542] S8: Determine the maximum cutting distance c based on all preset cutting features max1 and the closest cutting distance c min1 .

[0543] Specifically, step S8 of this embodiment may refer to steps S51 to S53 in embodiments 1 and 2.

[0544] S9: Based on c max1 and c min1 , determine the optimal cutting distance c corresponding to the laser cutting device 焦 1.

[0545] S10: Based on c 1初始 and c 焦1, determine the moving distance Z1 of the moving device corresponding to the first laser cutting device. Where Z1 = c 1初始 -c 焦1 .

[0546] S11: Based on Z1 and the distance arithmetic change rate k, determine the moving distance Z of the moving device corresponding to the mth laser cutting device m , Z m = Z1+(m-1)×k, where m is the mth laser cutting device starting from the first laser cutting device; when Z m When it is a negative number, the moving direction of the mobile device is away from the pole piece. m When it is a positive number, the moving direction of the moving device is toward the pole piece.

[0547] S12: each moving device is moved according to its corresponding moving distance, so as to adjust the distance c from each laser cutting device to the pole piece to its corresponding optimal cutting distance.

[0548] Since the projections of multiple laser cutting devices in the fourth direction are consistent, if the width direction of the pole piece coincides with the fourth direction, that is, when there is no angle, the distance from each laser cutting device to the pole piece is consistent, and the k calculated at this time is 0, that is, there is no arithmetic difference in distance change rate; and if the width direction of the pole piece does not coincide with the fourth direction, that is, when there is an angle, the distance from each laser cutting device to the pole piece is inconsistent. Since the inclination angles of the pole pieces are the same, in the initial state, the distances from any two laser cutting devices to the pole piece satisfy a linear relationship, so that the slope k of the linear relationship can be calculated through the above steps S1 to S3. Since the models of the laser cutting devices are the same, it is only necessary to determine the optimal cutting distance of one of the laser cutting devices (generally the laser cutting device located at the end is selected), calculate the amount of movement required for the laser cutting device, and then determine the amount of movement required for other laser cutting devices based on the linear relationship. The overall operation is simple, and only one of the laser cutting devices needs to be laser focused to determine the optimal cutting position of all laser cutting devices, and the laser focusing speed is faster.

[0549] Thus, the laser focusing method of this embodiment avoids the need to individually focus each laser cutting device. Simply determining the travel distance of one laser cutting device is sufficient to calculate the travel distances of the others. This allows for rapid focusing of multiple laser cutting devices, resulting in greater speed and convenience. Furthermore, this approach saves space for sensor installation, eliminating the need for multiple sensors, and reducing the overall size of the electrode slitting system.

[0550] In addition, in actual applications, you can also choose to focus the laser cutting devices corresponding to the first sensor and the second sensor according to steps S4 to S10 respectively to obtain two Z values, and recalculate the distance arithmetic change rate k based on the two Z values. Then, determine whether the values ​​of the two distance arithmetic change rates k are equal for verification, so as to determine that the models of the laser cutting device and sensor used are consistent. If the values ​​of the two distance arithmetic change rates are not equal, it is necessary to check the multiple laser cutting devices or sensors used, or perform laser focusing operations on each laser cutting device separately to improve the accuracy of the final focusing operation.

[0551] Thus far, the technical solutions of the present application have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is readily understood by those skilled in the art that the scope of protection of the present application is obviously not limited to these specific embodiments. Without departing from the principles of the present application, those skilled in the art may make equivalent changes or substitutions to the relevant technical features, and the technical solutions after such changes or substitutions will fall within the scope of protection of the present application.

Claims

1. A pole piece cutting system, characterized in that: The pole piece cutting system includes a pole piece cutting device, and the pole piece cutting device includes: A pole piece conveying device, which is used to drive the pole piece to travel on a belt; And a laser cutting device, which is configured to cut the pole piece that is conveyed to the cutting position, so as to cut the pole piece into a plurality of sub-pole pieces.

2. The pole piece cutting system according to claim 1, characterized in that: The pole piece cutting equipment also includes: A first detection device, along the tape running direction of the pole piece, the first detection device is arranged upstream of the slitting position, the first detection device is arranged toward the first side surface of the pole piece, and the first detection device is arranged to be able to detect first pole piece information and first coating area information of the first side surface of the pole piece; and a first control module, which is communicatively connected with the first detection device to receive information detected by the first detection device, wherein the first control module is configured to determine a first optimal cutting point of the first side surface of the pole piece on its width and a first cutting timing corresponding to the first optimal cutting point according to the information detected by the first detection device and a first preset parameter, so that the laser of the laser cutting device can move to the first optimal cutting point corresponding to the first cutting timing at the first cutting timing; The laser cutting device is also configured to control the laser to move along the width direction of the pole piece to change the cutting position of the laser.

3. The pole piece cutting system according to claim 2, characterized in that: The pole piece slitting device further comprises a second detection device in communication connection with the first control module, and the second detection device is arranged upstream of the slitting position along the tape running direction of the pole piece. The second detection device is arranged toward the second side of the pole piece, and the second detection device is arranged to detect the second pole piece information and the second coating area information of the second side of the pole piece, and to transmit the detected information to the first control module. The first control module is further configured to determine a second optimal cutting point of the second side surface of the pole piece on its width and a second cutting timing corresponding to the second optimal cutting point according to the information detected by the second detection device and a second preset parameter. The first control module is also configured to determine a third optimal cutting point corresponding to a third cutting timing based on the first optimal cutting point and the second optimal cutting point respectively corresponding to the first cutting timing and the second cutting timing at the same moment, so that the laser of the laser cutting device can move to the third optimal cutting point corresponding to the third cutting timing at the third cutting timing, wherein the third cutting timing is the first cutting timing and the second cutting timing at the same moment, and the third optimal cutting point is the midpoint of a line connecting the first optimal cutting point and the second optimal cutting point respectively corresponding to the first cutting timing and the second cutting timing at the same moment.

4. The pole piece cutting system according to claim 2, characterized in that: The number of the laser cutting devices is N, wherein N≥1 and N is an integer. When N>1, the plurality of laser cutting devices are arranged at intervals along the width direction of the pole piece.

5. The pole piece cutting system according to claim 3, characterized in that: Along the running direction of the pole piece, the first detection device and the second detection device are arranged alternately front and back.

6. The pole piece cutting system according to claim 2, characterized in that: The pole piece slitting device further comprises a third detection device in communication connection with the first control module, and the third detection device is arranged downstream of the slitting position along the tape running direction of the pole piece. The number of the third detection devices is the same as the number of the sub-pole pieces, and the multiple third detection devices are respectively arranged toward the first side surfaces of the multiple sub-pole pieces. The third detection devices are arranged to detect the first sub-pole piece information and the first sub-pole piece coating area information of the first side surface of the corresponding sub-pole piece, and can transmit the detected information to the first control module.

7. The pole piece cutting system according to claim 3, characterized in that: The pole piece slitting device further comprises a third detection device and a fourth detection device which are communicatively connected to the first control module. Along the tape-walking direction of the pole piece, the third detection device and the fourth detection device are both arranged downstream of the slitting position. The number of the third detection device and the fourth detection device is the same as the number of the sub-pole pieces. The plurality of third detection devices are respectively arranged toward the first side surfaces of the plurality of sub-pole sheets, and the third detection devices are arranged to detect the first sub-pole sheet information and the first sub-pole sheet coating area information of the first side surfaces of the corresponding sub-pole sheets, and transmit the detected information to the first control module; The plurality of fourth detection devices are respectively arranged toward the second side faces of the plurality of sub-pole pieces, and the fourth detection devices are arranged to detect the second sub-pole piece information and the second sub-pole piece coating area information of the second side faces of the corresponding sub-pole pieces, and to transmit the detected information to the first control module.

8. The pole piece cutting system according to claim 2, characterized in that: The electrode slitting equipment further comprises a material head cutting device, which is located downstream of the slitting position along the electrode tape running direction, and comprises a cutting knife and a moving mechanism, wherein the moving mechanism is configured to drive the cutting knife to move between the filling position and the standby position. When the cutting knife is located at the cutting position, the cutting knife can cut the electrode piece. When the cutting knife is located at the standby position, the cutting knife is away from the pole piece.

9. The pole piece cutting system according to claim 8, characterized in that: The electrode slitting device further includes a material head detection device and a second control module. The material head detection device is arranged upstream of the laser cutting device and is in communication connection with the second control module. The material head detection device is configured to detect the material head of the electrode piece, and to feed back a signal to the second control module after detecting the material head. The second control module is configured to determine the timing of the knife repair based on the feedback time of the feedback signal, the distance from the material head detection device to the cutting knife, and the tape transport speed of the pole piece, so that the moving mechanism drives the cutting knife to the knife repair position at the timing of the knife repair.

10. The pole piece cutting system according to any one of claims 1 to 9, characterized in that: The pole piece cutting device further comprises a pole piece dust suction device, wherein the dust suction device comprises a mounting seat, a first dust suction mechanism, an anti-shake mechanism, and a second dust suction mechanism; The first dust suction mechanism, the anti-shake mechanism and the second dust suction mechanism are sequentially distributed along a first direction; The first dust collection mechanism comprises a plurality of first dust collection covers, and the plurality of first dust collection covers are mounted on the mounting seat and spaced apart along the second direction; The second dust collection mechanism comprises a plurality of second dust collection covers, and the plurality of second dust collection covers are mounted on the mounting seat and spaced apart along the second direction; The anti-shake mechanism comprises a partition and a plurality of anti-shake plates, the partition is mounted on the mounting seat, the plurality of anti-shake plates are mounted on the partition and spaced apart along the second direction, the partition is provided with a first through hole, and the anti-shake plate is provided with a cutting through hole and a plurality of adsorption through holes; The anti-shake plate is located on one side of the partition plate close to the second dust cover, and there is a tape running gap between the anti-shake plate and the second dust cover for the pole piece to pass through. Each of the first dust covers is correspondingly provided with an anti-shake plate and a second dust cover, wherein the first dust cover passes through the first through hole and fits with the anti-shake plate corresponding to it, so that the pole piece can be adsorbed on the anti-shake plate, and the first dust cover is arranged opposite to the second dust cover corresponding to it; The first direction is the thickness direction of the pole piece, and the second direction is the width direction of the pole piece.

11. The pole piece cutting system according to claim 10, characterized in that: The anti-shake mechanism also includes a slide rail assembly, through which the partition is slidably connected to the mounting seat. The slide rail assembly can guide the partition during the movement of the partition relative to the mounting seat so that the partition moves linearly along the second direction.

12. The pole piece cutting system according to claim 11, characterized in that: The first dust collecting mechanism further includes a first connecting plate and a first sliding assembly, the first connecting plate extending along the second direction, the first dust collecting cover being mounted on the first connecting plate, the first connecting plate being connected to the mounting seat via the first sliding assembly, and the first sliding assembly being configured to drive the first connecting plate and the first dust collecting cover to move relative to the mounting seat along the first direction so that the first dust collecting cover is close to or away from the anti-shake plate; and / or, The second dust suction mechanism also includes a second connecting plate and a second sliding assembly, the second connecting plate extends along the second direction, the second dust hood is mounted on the second connecting plate, the second connecting plate is connected to the mounting seat through the second sliding assembly, and the second sliding assembly is configured to drive the second connecting plate and the second dust hood to move relative to the mounting seat along the first direction so that the second dust hood is close to or away from the anti-shake plate.

13. The pole piece cutting system according to claim 12, characterized in that: The second dust suction mechanism further includes a pole piece guide rod, which is mounted on the second connecting plate and located above the partition plate, and the pole piece guide rod and the second dust suction cover are respectively located on both sides of the pole piece.

14. The pole piece cutting system according to claim 12, characterized in that: The first sliding assembly includes a first driving member, a first linear guide rail and a first guide rail slider, the first linear guide rail is installed on the mounting seat and extends along the first direction, the first guide rail slider is slidably connected to the first linear guide rail and can slide along the length direction of the first linear guide rail, the first guide rail slider is connected to the first connecting plate, the first driving member is installed on the mounting seat and connected to the first connecting plate, and the first driving member can drive the first connecting plate to move relative to the mounting seat along the first direction; and / or, The second sliding assembly includes a second driving member, a second linear guide and a second guide rail slider, the second linear guide is installed on the mounting seat and extends along the first direction, the second guide rail slider is slidably connected to the second linear guide and can slide along the length direction of the second linear guide, the second guide rail slider is connected to the second connecting plate, the second driving member is installed on the mounting seat and connected to the second connecting plate, and the second driving member can drive the second connecting plate to move relative to the mounting seat along the first direction.

15. The pole piece cutting system according to claim 12, characterized in that: The first dust collecting mechanism further includes a first spacing adjustment component, the first dust collecting cover is connected to the first connecting plate via the first spacing adjustment component, and the first spacing adjustment component is configured to be able to adjust the spacing between two adjacent first dust collecting covers; And / or, the second dust collection mechanism further includes a second spacing adjustment component, the second dust collection cover is connected to the second connecting plate via the second spacing adjustment component, and the second spacing adjustment component is configured to be able to adjust the spacing between two adjacent second dust collection covers; And / or, the anti-shake mechanism further includes a third spacing adjustment component, the anti-shake plate is connected to the partition via the third spacing adjustment component, and the third spacing adjustment component is configured to adjust the spacing between two adjacent anti-shake plates.

16. The pole piece cutting system according to claim 15, characterized in that: The number of the first dust suction covers, the second dust suction covers and the anti-shake plates is the same and is an odd number.

17. The pole piece cutting system according to claim 16, characterized in that: The first dust collecting cover located in the middle of the first dust collecting mechanism is relatively fixed to the first connecting plate. The second dust collecting cover located in the middle of the second dust collecting mechanism is relatively fixed to the second connecting plate. The anti-shake plate located at the middle position of the anti-shake mechanism is relatively fixed to the partition plate.

18. The pole piece cutting system according to claim 17, characterized in that: The first spacing adjustment assembly includes a third linear guide rail, a plurality of third guide rail sliders, a plurality of first fixing frames, a connecting rod assembly, a driving rod and a bolt. The third linear guide is mounted on the first connecting plate and extends along the second direction, a plurality of third guide sliders are respectively mounted on a plurality of first fixing frames, and the third guide sliders are slidably connected to the third linear guide and can move along the length direction of the third linear guide. The first dust hood is mounted on the first fixing frame, and a plurality of the first fixing frames are connected by the connecting rod assembly. Along the second direction, the first fixing frame located in the middle is fixedly connected to the first connecting plate. The first fixing frame at the end is connected to the first end of the driving rod, the second end of the driving rod is provided with a first oblong groove extending along the second direction, and the bolt passes through the first oblong groove and is threadedly connected to the first connecting plate; When the driving rod moves along the second direction, it can drive the first fixing frame connected thereto to move toward or away from the first fixing frame located in the middle position and simultaneously drive the other first fixing frames to move toward or away from the first fixing frame located in the middle position through the connecting rod assembly. The connecting rod assembly is configured to adjust the spacing between two adjacent first fixing frames to be equal when driving the first fixing frames to move. And / or, the second spacing adjustment assembly includes a fourth linear guide rail, a plurality of fourth guide rail sliders, a plurality of second fixing frames and a plurality of equal-width blocks of the same size, The fourth linear guide is mounted on the second connecting plate and extends along the second direction, a plurality of fourth guide sliders are respectively mounted on a plurality of second fixing frames, and the fourth guide sliders are slidably connected to the fourth linear guide and can move along the length direction of the fourth linear guide. The second dust hood is mounted on the second fixing frame. Along the second direction, the second fixing frame located in the middle is fixedly connected to the second connecting plate, and two adjacent second fixing frames are connected by an equal-width block so that the intervals between the two adjacent second fixing frames are the same; And / or, the third spacing adjustment component includes a limit member and a locking bolt, the limit member is installed on the partition and extends along the second direction, the limit member forms a limiting surface on a side close to the anti-shake plate, the anti-shake plate abuts against the limiting surface, and the partition is provided with a second elongated groove extending along the second direction, and the locking bolt passes through the second elongated groove and is threadedly connected to the anti-shake plate.

19. A control method for a pole piece cutting system, applied to the pole piece cutting system according to claim 2, 4 or 6, characterized in that: The control method comprises: S1: The first detection device detects first pole piece information and first coating area information of a first side surface of the pole piece in real time, and transmits the detected information to the first control module; S2: the first control module determines a first optimal cutting point of the first side surface of the electrode piece on its width according to the first electrode piece information and the first coating area information; S3: the first control module acquires the detection time of the first coating area information, the distance from the first detection device to the slitting position, and the tape running speed of the pole piece; S4: the first control module determines the first cutting timing corresponding to the first optimal cutting point according to the detection time of the first coating area information, the distance from the first detection device to the cutting position, and the tape running speed of the electrode piece; S5: The laser cutting device controls the laser to move to the first optimal cutting point corresponding to the first cutting timing at the first cutting timing.

20. A control method for a pole piece cutting system, applied to the pole piece cutting system according to claim 3, 5 or 7, characterized in that: The control method comprises: S1: The first detection device detects first pole piece information and first coating area information of a first side surface of the pole piece in real time, and transmits the detected information to the first control module; S2: the first control module determines a first optimal cutting point of the first side surface of the electrode piece on its width according to the first electrode piece information and the first coating area information; S3: the first control module acquires the detection time of the first coating area information, the distance from the first detection device to the slitting position, and the tape running speed of the pole piece; S4: the first control module determines the first cutting timing corresponding to the first optimal cutting point according to the detection time of the first coating area information, the distance from the first detection device to the cutting position, and the tape running speed of the electrode piece; S5: The second detection device detects the second pole piece information and the second coating area information of the second side surface of the pole piece in real time, and transmits the detected information to the first control module; S6: the first control module determines a second optimal cutting point of the second side surface of the electrode piece on its width according to the second electrode piece information and the second coating area information; S7: the first control module acquires the detection time of the second coating area information, the distance from the second detection device to the slitting position, and the tape running speed of the pole piece; S8: The first control module determines the second cutting timing corresponding to the second optimal cutting point according to the detection time of the second coating area information, the distance from the second detection device to the cutting position, and the tape running speed of the electrode piece; S9: the first control module determines a third optimal cutting point corresponding to a third cutting opportunity according to the first optimal cutting point and the second optimal cutting point respectively corresponding to the first cutting opportunity and the second cutting opportunity at the same time; S10: The laser cutting device controls the laser to move to the third optimal cutting point corresponding to the third cutting timing at the third cutting timing.

21. A control method for a pole piece cutting system, applied to the pole piece cutting system according to claim 1, characterized in that: The pole piece cutting system further comprises a visual device and a tape-walking detection device, wherein the visual device is located upstream of the cutting position and is used to obtain image information of the pole piece on the tape walk; The tape running detection device is configured to detect tape running information of the pole piece; The control method comprises: The tape running detection device detects the tape running information of the pole piece in real time; The visual device acquires the image information of the pole piece once every set parameters; Based on the image information, determining the best cutting point of the electrode area corresponding to the image information; Determining a cutting time corresponding to the optimal cutting point based on the tape running information and the distance from the visual device to the cutting position; The laser cutting device controls the laser to move to the optimal cutting point corresponding to the cutting timing at the cutting timing.

22. The control method of the pole piece cutting system according to claim 21, characterized in that: The setting parameter is to set the tape running length or set the time; The step of "the visual device acquires the image information of the pole piece once every set parameters" specifically includes: The visual device acquires the image information of the pole piece once every set tape running length or set time.

23. The control method of the pole piece cutting system according to claim 21, characterized in that: The control method further comprises: Judging whether the pole piece on the tape is qualified based on the image information; According to the judgment results, alarm and shutdown are selectively issued.

24. The control method of the pole piece cutting system according to claim 21, characterized in that: When the laser emitted by the laser cutting device cuts the pole piece, the control method further includes: Determining cutting parameters based on the tape transport information; The laser cutting device is enabled to emit laser according to the cutting parameters.

25. The control method of the pole piece cutting system according to claim 21, characterized in that: The pole piece cutting system further comprises a material head detection device and a hardware cutting device, wherein the material head detection device is used to detect the material head area of ​​the pole piece, and the hardware cutting device is configured to be able to move between a standby position and a knife-making position and to be able to cut the material head area of ​​the pole piece being fed at the knife-making position, wherein the knife-making position is located downstream of the cutting position; The control method further comprises: The material head detection device detects the material head area of ​​the electrode in real time to obtain time information of the detection of the material head area; Determine the avoidance timing of the laser cutting device based on the time information, the tape running information, and the distance from the material head detection device to the cutting position; The laser cutting device is caused to stop emitting laser at the avoidance timing or the laser is controlled to move to a standard cutting point at the avoidance timing; Determine the timing of the metal cutting device to make up the cut based on the time information, the tape running information, and the distance from the material head detection device to the make up cut position; The hardware cutting device is moved to the repairing position at the repairing time, so that the hardware cutting device cuts the material head area.

26. The control method of the pole piece cutting system according to any one of claims 21 to 25, characterized in that: The visual device comprises a first visual device and a second visual device, wherein the first visual device is used to obtain first image information of a first surface of the pole piece on the tape, and the second visual device is used to obtain second image information of a second surface of the pole piece on the tape; The step of "the visual device acquires the image information of the pole piece once every set parameters" specifically includes: The first visual device acquires first image information of the first surface of the pole piece once every set parameters; The second visual device acquires the second image information of the second surface of the pole piece once every set parameters; The step of "determining the optimal cutting point of the electrode area corresponding to the image information based on the image information" specifically includes: Based on the first image information, determining a first cutting point on the first surface of the electrode area corresponding to the first image information; Based on the second image information, determining a second cutting point on the second surface of the pole piece region corresponding to the second image information; Determining the best cutting point corresponding to the same pole piece region based on the first cutting point and the second cutting point corresponding to the same pole piece region; The step of "determining the cutting timing corresponding to the optimal cutting point based on the tape running information and the distance from the visual device to the cutting position" specifically includes: Based on the tape transport information and the distance from the first visual device to the cutting position, the cutting time corresponding to the optimal cutting point is determined; or based on the tape transport information and the distance from the second visual device to the cutting position, the cutting time corresponding to the optimal cutting point is determined.

27. The control method of the pole piece cutting system according to claim 26, characterized in that: The step of "determining, based on the first image information, a first cutting point of the electrode area corresponding to the first image information on the first surface" specifically includes: Identify the first image information, determine the edge position of the first pole piece, the width of the first pole piece, the edge position of the first coating area, and the width of the first coating area; Determine a first cutting point of the electrode region corresponding to the first image information on the first surface based on the edge position of the first electrode piece, the width of the first electrode piece, the edge position of the first coating area, and the width of the first coating area; The step of "determining, based on the second image information, a second cutting point of the electrode area corresponding to the second image information on the second surface" specifically includes: Identify the second image information, determine the edge position of the second pole piece, the width of the second pole piece, the edge position of the second coating area, and the width of the second coating area; Based on the edge position of the second pole piece, the width of the second pole piece, the edge position of the second coating area, and the width of the second coating area, a second cutting point of the pole piece area corresponding to the second image information on the second surface is determined.

28. The control method of the pole piece cutting system according to claim 26, characterized in that: The tape running information includes the tape running speed of the pole piece; The step of "determining the cutting timing corresponding to the optimal cutting point based on the tape running information and the distance from the first visual device to the cutting position" specifically includes: Determining a first preset time required for the first cutting point to reach the cutting position based on the tape travel speed and the distance from the first visual device to the cutting position; Adding the first preset time to the detection time of the first image information corresponding to the first cutting point to obtain the cutting timing corresponding to the optimal cutting point determined by the first cutting point; Alternatively, the step of "determining the cutting timing corresponding to the optimal cutting point based on the tape running information and the distance from the second visual device to the cutting position" specifically includes: Determining a second preset time required for the second cutting point to reach the cutting position based on the tape travel speed and the distance from the second visual device to the cutting position; The second preset time is added to the detection time of the second image information corresponding to the second cutting point to obtain the cutting timing corresponding to the optimal cutting point determined by the second cutting point.

29. The control method of the pole piece cutting system according to claim 26, characterized in that: The tape running information includes the tape running length of the pole piece; The step of "determining the cutting timing corresponding to the optimal cutting point based on the tape running information and the distance from the first visual device to the cutting position" specifically includes: Calculating a first length difference between the current tape running length and the tape running length corresponding to when the first image information is detected; calculating a second length difference between the distance from the first visual device to the cutting position and the first length difference; Determine whether the second length difference is equal to 0. When the second length difference is equal to 0, the current moment is the cutting time corresponding to the optimal cutting point determined by the first cutting point; Alternatively, the step of "determining the cutting timing corresponding to the optimal cutting point based on the tape running information and the distance from the second visual device to the cutting position" specifically includes: Calculating a third length difference between the current tape running length and the tape running length corresponding to when the second image information is detected; calculating a fourth length difference between the distance from the second visual device to the cutting position and the third length difference; It is determined whether the fourth length difference is equal to 0. When the fourth length difference is equal to 0, the current moment is the cutting opportunity corresponding to the optimal cutting point determined by the second cutting point.

30. A laser focusing method for a pole piece cutting system, applied to the pole piece cutting system according to claim 1, characterized in that: The pole piece cutting system further comprises a sensor, a pole piece and a moving device, the laser cutting device is mounted on the moving device, the moving device is configured to drive the laser cutting device to move toward and away from the pole piece to adjust the distance between the laser cutting device and the pole piece, and the sensor is used to detect the distance between the laser cutting device and the pole piece; The laser focusing method comprises the following steps: S1: Obtain the laser working distance a, the laser cutting floating distance b and the sensor detection error d; S2: Determine the maximum test distance L of the focusing test based on the laser working distance a, the laser cutting floating distance b and the sensor detection error d max and the minimum test distance L min ; S3: The sensor detects the distance c from the laser cutting device to the pole piece in real time; S4: Adjust the distance c between the laser cutting device and the pole piece, and start the laser cutting device once every set moving distance e, so that the laser cutting device emits laser and cuts a preset feature on the pole piece, where c∈[L min , L max ], in each process of adjusting the distance c from the laser cutting device to the pole piece or before the laser cutting device cuts the preset feature, the pole piece is made to travel a preset length l, so that the distance between two adjacent preset features to be cut is l; S5: Determine the maximum cutting distance c according to all the preset features of the cutting max and the closest cutting distance c min ; S6: Based on c max and c min , determine the optimal cutting distance c 焦 ; S7: The moving device drives the laser cutting device to move until the distance c between the laser cutting device and the pole piece is equal to the optimal cutting distance c 焦 .

31. The laser focusing method of the pole piece cutting system according to claim 30, characterized in that: Step S4 specifically includes the following steps: S41: The moving device drives the laser cutting device to move, and the distance c between the laser cutting device and the pole piece is adjusted to c=c1=L max ; S42: starting the laser cutting device, so that the laser cutting device emits laser and cuts a preset feature on the pole piece; S43: making the pole piece run along a preset length l; S44: The moving device drives the laser cutting device to move again, and the laser cutting device moves toward the pole piece by a set distance e, so that the distance between the laser cutting device and the pole piece is c=c n =L max -(n-1)×e, where n is the number of adjustments of the laser cutting device; S45: starting the laser cutting device again, so that the laser cutting device emits laser and cuts one of the preset features on the pole piece; S46: Repeat steps S43, S44 and S45 until L max -(n-1)×e≤L min Then execute step S5.

32. The laser focusing method of the pole piece cutting system according to claim 31, characterized in that: Step S5 specifically includes the following steps: S51: Identify all the preset features of cutting; S52: Determine the preset feature of the first cut through the pole piece, and determine the farthest cutting distance c based on the preset feature of the first cut through the pole piece max ; S53: Determine the preset feature of the last cut through the pole piece, and determine the shortest cutting distance c based on the preset feature of the last cut through the pole piece. min .

33. The laser focusing method of the pole piece cutting system according to claim 30, characterized in that: Step S4 specifically includes the following steps: S41: The moving device drives the laser cutting device to move, and the distance c between the laser cutting device and the pole piece is adjusted to c=c1=L min ; S42: starting the laser cutting device, so that the laser cutting device emits laser and cuts a preset feature on the pole piece; S43: making the pole piece run along a preset length l; S44: The moving device drives the laser cutting device to move again, and the laser cutting device moves away from the pole piece by a set distance e, so that the distance between the laser cutting device and the pole piece is c=c n =L min +(n-1)×e, where n is the number of adjustments of the laser cutting device; S45: starting the laser cutting device again, so that the laser cutting device emits laser and cuts one of the preset features on the pole piece; S46: Repeat steps S43, S44 and S45 until L min +(n-1)×e≥L max Then execute step S5.

34. The laser focusing method of the pole piece cutting system according to claim 33, characterized in that: Step S5 specifically includes the following steps: S51: Identify all the preset features of cutting; S52: Determine the preset feature of the first cut through the pole piece, and determine the shortest cutting distance c based on the preset feature of the first cut through the pole piece. min ; S53: Determine the preset feature of the last cut through the pole piece, and determine the farthest cutting distance c based on the preset feature of the last cut through the pole piece. max .

35. The laser focusing method of the pole piece cutting system according to claim 30, characterized in that: In step S2, L max =a+b+d, L min =abd; And / or, in step S6, c 焦 =(c max +c min )÷2.

36. The laser focusing method of the pole piece cutting system according to any one of claims 30 to 35, characterized in that: There are multiple laser cutting devices, each of which is mounted on one of the moving devices, and the multiple laser cutting devices are distributed at equal intervals along the fourth direction. The sensor includes a first sensor and a second sensor, the first sensor is arranged on one of the laser cutting devices located at one end thereof, and the second sensor is arranged on another of the laser cutting devices, and the first sensor and the second sensor respectively detect the distance from the corresponding laser cutting device to the pole piece; The laser focusing method comprises the following steps: S1: The first sensor detects the first initial distance c from the first laser cutting device to the pole piece. 1初始 ; S2: The second sensor detects the nth initial distance c from the corresponding nth laser cutting device to the pole piece. n初始 ; S3: Based on the first initial distance c 1初始 and the nth initial distance c n初始 , determine the arithmetic change rate k of the distance; S4: Obtaining the laser working distance a, the laser cutting floating distance b, and the sensor detection error d; S5: Determine the maximum test distance L of the focusing test based on the laser working distance a, the laser cutting floating distance b and the sensor detection error d max and the minimum test distance L min ; S6: The first sensor detects in real time the distance c1 between the first laser cutting device corresponding to it and the pole piece; S7: Adjust the distance c1 from the first laser cutting device to the pole piece, and start the first laser cutting device once every set moving distance e, so that the first laser cutting device emits laser and cuts a preset feature on the pole piece, wherein c1∈[L min , L max ], in each process of adjusting the distance c1 from the first laser cutting device to the pole piece or before the first laser cutting device cuts the preset feature, the pole piece is made to travel a preset length l, so that the distance between two adjacent preset features to be cut is l; S8: Determine the maximum cutting distance c according to all the preset features of the cutting max1 and the closest cutting distance c min1 ; S9: Based on c max1 and c min1 , determine the optimal cutting distance c corresponding to the laser cutting device 焦1 ; S10: Based on c 1初始 and c 焦1 , determine the moving distance Z1 of the moving device corresponding to the first laser cutting device; S11: Based on Z1 and the distance arithmetic change rate k, determine the moving distance Z of the moving device corresponding to the mth laser cutting device m ; S12: each of the moving devices is moved according to the corresponding moving distance, so as to adjust the distance c from each of the laser cutting devices to the pole piece to the corresponding optimal cutting distance.

37. The laser focusing method of the pole piece cutting system according to claim 36, characterized in that: In step S3, 38. The laser focusing method of the pole piece cutting system according to claim 37, characterized in that: In step S10, Z1=c 1初始 -c 焦1 ; In step S11, Z m = Z1+(m-1)×k, wherein m is the mth laser cutting device starting from the first laser cutting device; when Z m When Z is a negative number, the moving direction of the moving device is away from the pole piece. m When is a positive number, the moving direction of the moving device is towards the pole piece.

Images