CN117718609A - Control method for pole piece slitting system and pole piece slitting system - Google Patents
Control method for pole piece slitting system and pole piece slitting system Download PDFInfo
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- CN117718609A CN117718609A CN202410172824.0A CN202410172824A CN117718609A CN 117718609 A CN117718609 A CN 117718609A CN 202410172824 A CN202410172824 A CN 202410172824A CN 117718609 A CN117718609 A CN 117718609A
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- 238000000034 method Methods 0.000 title claims abstract description 65
- 238000005520 cutting process Methods 0.000 claims abstract description 456
- 238000003698 laser cutting Methods 0.000 claims abstract description 60
- 238000001514 detection method Methods 0.000 claims abstract description 59
- 239000011248 coating agent Substances 0.000 claims description 58
- 238000000576 coating method Methods 0.000 claims description 58
- 230000001502 supplementing effect Effects 0.000 claims description 21
- 230000000007 visual effect Effects 0.000 claims description 12
- 238000011144 upstream manufacturing Methods 0.000 claims description 7
- 230000008859 change Effects 0.000 claims description 3
- 230000002950 deficient Effects 0.000 abstract description 6
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 abstract description 4
- 229910052744 lithium Inorganic materials 0.000 abstract description 4
- 238000012937 correction Methods 0.000 abstract description 2
- 230000007246 mechanism Effects 0.000 description 14
- 230000008569 process Effects 0.000 description 8
- 238000012986 modification Methods 0.000 description 5
- 230000004048 modification Effects 0.000 description 5
- 230000001960 triggered effect Effects 0.000 description 5
- 239000000463 material Substances 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 150000002739 metals Chemical class 0.000 description 4
- 230000008439 repair process Effects 0.000 description 3
- 239000002390 adhesive tape Substances 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000013072 incoming material Substances 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 230000008901 benefit Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000036632 reaction speed Effects 0.000 description 1
- 238000011897 real-time detection Methods 0.000 description 1
- 230000000153 supplemental effect Effects 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Abstract
The invention belongs to the technical field of lithium batteries, and particularly provides a control method for a pole piece slitting system and the pole piece slitting system. The pole piece cutting machine aims at solving the problems that in the cutting process of the existing pole piece, deviation correction detection is lagged, the position of the pole piece cannot be timely adjusted, and more defective products are easily caused. Therefore, the control method of the invention comprises that the tape running detection device detects the tape running information of the pole piece in real time; the vision device acquires the image information of the pole piece once every other set parameter; determining an optimal cutting point of a pole piece area corresponding to the image information based on the image information; determining the cutting time corresponding to the optimal cutting point based on the tape feeding information and the distance from the vision device to the cutting position; the laser cutting device is controlled to move to the optimal cutting point corresponding to the cutting time at the cutting time. The control method can improve the slitting precision and ensure the yield of the slit pole pieces.
Description
Technical Field
The invention belongs to the technical field of lithium batteries, and particularly provides a control method for a pole piece slitting system and the pole piece slitting system.
Background
At present, the pole piece of the lithium battery is cut mainly by a hardware cutter. The method for slitting the pole pieces by the hardware cutting knife comprises the steps of determining the positions of the hardware cutting knife according to the widths of the pole pieces to be slit, fixedly installing the hardware cutting knife, and ensuring that the positions of two sides or a single side of the wide pole pieces of the supplied materials are accurate by using a deviation correcting device, wherein the wide pole pieces are slit into narrow pole pieces with the required widths after passing through the hardware cutting knife.
At present, a small part of factories use laser to cut pole pieces, but in practical application, a laser device is fixed, the feeding position of a wide pole piece is controlled through a deviation correcting device, then the width is detected after cutting, and the deviation correcting device is further driven to correct the position of the feeding pole piece through the width data of the pole piece detected after downstream cutting, so that the width size of the cut narrow pole piece is ensured. The deviation rectifying mode has obvious hysteresis, the position of the pole piece cannot be timely adjusted, and more defective products are easily produced.
Accordingly, there is a need in the art for a new solution to the above-mentioned technical problems.
Disclosure of Invention
The invention aims to solve the technical problems that the position of the pole piece cannot be adjusted in time due to deviation correction and detection lag in the slitting process of the existing pole piece, and more defective products are easy to cause.
In a first aspect, the present invention provides a control method for a pole piece slitting system comprising a vision device, a laser cutting device, and a tape running detection device; the laser cutting device is arranged to emit laser to cut the pole piece which is walked to the cutting position, and is also arranged to control the emitted laser to move along the width direction of the pole piece so as to change the position of the cutting point; the visual device is positioned at the upstream of the cutting position and is used for acquiring image information of the pole piece of the tape; the tape running detection device is arranged to be capable of detecting tape running information of the pole piece; the control method comprises the following steps: 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 parameter; based on the image information, determining an optimal cutting point of a pole piece area corresponding to the image information; determining a cutting time corresponding to the optimal cutting point based on the tape feeding information and the distance from the vision device to the cutting position; and enabling the laser cutting device to control the laser to move to the optimal cutting point corresponding to the cutting time at the cutting time.
In the above preferred technical solution of the control method for a pole piece slitting system, the setting parameter is a set tape length or a set time; the step of acquiring the image information of the pole piece once every set parameter by the vision device specifically comprises the following steps: the visual device acquires the image information of the pole piece once every set tape length or set time.
In the above preferred technical solution of the control method for a pole piece slitting system, the control method further includes: judging whether the pole piece on the tape is qualified or not based on the image information; and (5) selectively alarming and stopping according to the judging result.
In the above preferred technical solution of the control method for a pole piece slitting system, when the laser emitted by the laser cutting device slits the pole piece, the control method further includes: determining cutting parameters based on the deck information; and enabling the laser cutting device to emit laser according to the cutting parameters.
In the above preferred technical solution of the control method for a pole piece slitting system, the pole piece slitting system further includes a stub bar detection device for detecting a stub bar area of the pole piece, and a hardware cutting device configured to be movable between a standby position and a repair position and to be capable of cutting the stub bar area of the pole piece of the traveling tape at the repair position, the repair position being located downstream of the cutting position; the control method further includes: the stub bar detection device detects the stub bar area of the pole piece in real time to obtain time information of detecting the stub bar area; determining the avoiding time of the laser cutting device based on the time information, the tape moving information and the distance from the stub bar detection device to the cutting position; stopping the laser cutting device from emitting laser at the avoidance time or controlling the laser to move to a standard cutting point at the avoidance time; determining the cutter supplementing time of the hardware cutting device based on the time information, the tape feed information and the distance from the stub bar detection device to the cutter supplementing position; and enabling the hardware cutting device to move to the cutter supplementing position at the cutter supplementing time, so that the hardware cutting device cuts the stub bar area.
In the above preferred technical solution of the control method for a pole piece slitting system, the vision device includes a first vision device and a second vision device, the first vision device is used for obtaining first image information of a first face of the pole piece that is being walked, and the second vision device is used for obtaining second image information of a second face of the pole piece that is being walked; the step of acquiring the image information of the pole piece once every set parameter by the vision device specifically comprises the following steps: the first vision device acquires first image information of the first surface of the pole piece once every set parameter; the second vision device acquires second image information of the second surface of the pole piece once every set parameter; the step of determining the optimal cutting point of the pole piece area corresponding to the image information based on the image information specifically comprises the following steps: determining a first cutting point of a pole piece area corresponding to the first image information on a first surface based on the first image information; determining a second cutting point of a pole piece area corresponding to the second image information on a second surface based on the second image information; determining an optimal cutting point corresponding to the 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 time corresponding to the optimal cutting point based on the tape feeding information and the distance from the vision device to the cutting position specifically includes: determining a cutting time corresponding to the optimal cutting point based on the tape feeding information and the distance from the first vision device to the cutting position; or determining the cutting time corresponding to the optimal cutting point based on the tape feeding information and the distance from the second vision device to the cutting position.
In the above preferred technical solution of the control method for a pole piece slitting system, the step of determining, based on the first image information, a first cutting point of a pole piece area corresponding to the first image information on a first surface specifically includes: identifying the first image information, and determining 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; determining a first cutting point of a pole piece area corresponding to the first image information on a first surface based on 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; the step of determining a second cutting point on the second face of the pole piece region corresponding to the second image information based on the second image information specifically includes: identifying the second image information, and determining 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; and determining a second cutting point of the pole piece region corresponding to the second image information on a second face based on the edge position of the second pole piece, the width of the second pole piece, the edge position of the second coating region and the width of the second coating region.
In the above preferred technical solution of the control method for a pole piece slitting system, the tape running information includes a tape running speed of the pole piece; the step of determining the cutting time corresponding to the optimal cutting point based on the tape feeding information and the distance from the first vision 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 moving speed and the distance from the first vision 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 time corresponding to the optimal cutting point determined by the first cutting point; or, the step of determining the cutting time corresponding to the optimal cutting point based on the tape feeding information and the distance from the second vision 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 moving speed and the distance from the second vision device to the cutting position; and adding the second preset time to the detection time of the second image information corresponding to the second cutting point to obtain the cutting time corresponding to the optimal cutting point determined by the second cutting point.
In the above preferred technical solution of the control method for a pole piece slitting system, the tape running information includes a tape running length of the pole piece; the step of determining the cutting time corresponding to the optimal cutting point based on the tape feeding information and the distance from the first vision device to the cutting position specifically includes: calculating a first length difference between the current deck length and the deck length corresponding to the first image information; calculating a second length difference between the distance of the first vision device to the cutting location and the first length difference; judging whether the second length difference value is equal to 0, and when the second length difference value is equal to 0, determining that the current moment is the cutting time corresponding to the optimal cutting point determined by the first cutting point; or, the step of determining the cutting time corresponding to the optimal cutting point based on the tape feeding information and the distance from the second vision device to the cutting position specifically includes: calculating a third length difference between the current deck length and the deck length corresponding to the second image information; calculating a fourth length difference between the distance of the second vision device to the cutting location and the third length difference; judging whether the fourth length difference value is equal to 0, and when the fourth length difference value is equal to 0, determining that the current moment is the cutting time corresponding to the optimal cutting point determined by the second cutting point.
In a second aspect, the present invention provides a pole piece slitting system comprising a processor configured to perform the control method for a pole piece slitting system described above.
Under the condition of adopting the technical scheme, the control method of the pole piece cutting system detects the image information of the pole piece by arranging the vision device at the upstream of the laser cutting device, and arranges the tape feed detection device to receive the tape feed information of the pole piece so as to determine the optimal cutting point of the pole piece and the cutting time corresponding to the optimal cutting point, thereby the laser cutting device controls the laser to move to the corresponding optimal cutting point at the cutting time for cutting.
Further, after the image information is obtained, whether the pole piece of the tape is qualified is further judged according to the image information, whether the pole piece of the incoming material is qualified can be judged, further processing of unqualified pole pieces is avoided, more defective products can be avoided, and energy and time waste are avoided.
Still further, in the process of cutting by laser, cutting parameters are determined in real time according to the tape feeding information, so that laser emitted by the laser cutting device is matched with the current tape feeding condition, and therefore, the cut pole piece is ensured to have no flaws such as burrs.
Still further, through the stub bar region of real-time detection pole piece to according to the time information and the relevant parameter determination five metals cutting device's of stub bar region that detect the time and the time of dodging of laser cutting device, can make the pole piece cut smoothly, guarantee to cut the stub bar region thoroughly, avoid the pole piece to cut the incomplete situation, facilitate the use, and convenient control.
Drawings
Preferred embodiments of the present invention are described below with reference to the accompanying drawings, in which:
FIG. 1 is a schematic illustration of the pole piece slitting system of the present invention;
FIG. 2 is a flow chart of the main steps of the control method for the pole piece slitting system of the present invention;
FIG. 3 is a flow chart of a first embodiment of the control method for the pole piece slitting system of the present invention;
FIG. 4 is a flow chart of a second embodiment of the control method for the pole piece slitting system of the present invention;
fig. 5 is a flow chart of a third embodiment of the control method for the pole piece slitting system of the present invention.
List of reference numerals:
1. a vision device; 11. a first vision device; 12. a second vision device;
2. a laser cutting device;
3. a tape deck detection device;
4. a stub bar detection device;
5. hardware cutting device.
Detailed Description
Preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are merely for explaining the technical principles of the present invention, and are not intended to limit the scope of the present invention.
It should be noted that, in the description of the present invention, terms such as "upper", "lower", and the like, refer to directions or positional relationships based on those shown in the drawings, which are merely for convenience of description, and do not indicate or imply that the apparatus or elements must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," "fourth," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
Furthermore, it should be noted that, in the description of the present invention, unless explicitly specified and limited otherwise, the terms "disposed," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; may be directly connected or indirectly connected through other members. The specific meaning of the above terms in the present invention can be understood by those skilled in the art according to the specific circumstances.
Referring specifically to fig. 1, the pole piece slitting system of the present invention includes a vision device 1, a laser cutting device 2, a tape running detection device 3, and a processor (not shown).
Wherein a processor is in communication with the vision apparatus 1, the laser cutting apparatus 2 and the tape running detection apparatus 3, the processor being capable of receiving signals from the respective apparatuses and transmitting control signals to the respective apparatuses for controlling the operation of the respective apparatuses, and the processor being configured to be capable of executing the control method of the present invention.
The laser cutting device 2 is arranged to emit laser light to enable the pole piece (not marked in the figure) to be slit, which is brought to the cutting position, and the laser cutting device 2 is also arranged to be able to control the laser light emitted thereby to move in the width direction of the pole piece to enable the position of the cutting point to be changed. The laser cutting device 2 can control the laser emitted by the laser cutting device to move along the width direction of the pole piece, so that the position of a cutting point of the laser can be changed, and the width of the pole piece after cutting is controlled.
The vision device 1 is located upstream of the cutting position, the vision device 1 being used to acquire image information of the pole piece being walked. The visual device 1 is arranged at the upstream of the cutting position to acquire the image information of the pole piece of the tape so as to determine the position of the optimal cutting point according to 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 acquire the image information of the pole piece, and the cutting position of the laser is determined before cutting so that the laser can cut the pole piece at the optimal cutting point during cutting, thereby effectively ensuring the cutting precision, improving the feedback hysteresis quality, timely adjusting the cutting position and ensuring the product yield.
The tape running detection means 3 is arranged to be able to detect the tape running information of the pole piece. The tape running information of the pole piece is detected in real time by the tape running detection device 3, the acquisition time of the image information can be matched with the tape running information, and then the cutting time of the optimal cutting point can be conveniently and accurately determined, so that the cutting precision of the pole piece is improved, and the situation of cutting errors caused by unmatched optimal cutting point and cutting time is avoided.
According to the pole piece cutting system, the visual device 1 is arranged at the upstream of the cutting position to detect the image information of the pole piece, and the tape running detection device 3 is arranged to detect the tape running information of the pole piece, so that the optimal cutting point of the specific area and the cutting time corresponding to the optimal cutting point can be determined before the tape is fed to the cutting position, the laser cutting device 2 can control the laser to move to the optimal cutting point at the optimal cutting time, the laser is ensured to cut at the optimal cutting point, the cutting precision is improved, and the yield of the cut pole piece is ensured.
It should be noted that, the specific structure of the laser cutting device 2 and the adjustment manner of adjusting the laser position are not limited in the present invention, and in practical application, a person skilled in the art may set the specific structure of the laser cutting device 2 and the adjustment manner of adjusting the laser position according to actual needs. For example, the laser cutting device 2 includes a laser generator, a galvanometer, and a field lens, and laser light emitted from the laser generator is irradiated toward the pole piece after passing through the galvanometer and the field lens in order, 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 comprises a moving mechanism, a laser generator and a field lens, wherein the laser generator and the field lens are connected with the moving mechanism, the field lens is relatively fixed with the laser generator, laser emitted by the laser generator irradiates towards the pole piece through the field lens, and the moving mechanism is arranged to drive the laser generator and the field lens to move along the width direction of the pole piece, so that the moving mechanism drives the laser generator to move to adjust the position of the laser in the width direction of the pole piece; etc. Such modifications and changes in the specific structure of the laser cutting device 2 do not depart from the basic principle of the present invention and are intended to be within the scope of the present invention.
It should be noted that the number of the laser cutting devices 2 is not limited in any way, and in practical applications, a person skilled in the art can set the specific number of the laser cutting devices 2 according to actual needs, and the adjustment and the change of the specific number of the laser cutting devices 2 do not deviate from the basic principles of the present invention and should be limited in the protection scope of the present invention.
The number of laser cutting devices 2 is illustratively 1, and the number of optimal cutting points is also 1, in which case the wide-width pole pieces are slit into 2 narrow-width pole pieces.
The number of laser cutting devices 2 is 5, the number of optimal cutting points is 5, and the 5 laser cutting devices 2 are distributed at intervals along the width direction of the pole piece and respectively correspond to one optimal cutting point, in this case, the wide pole piece is cut into 6 narrow pole pieces.
In one embodiment, the vision device 1 includes a first vision device 11, where the first vision device 11 is disposed opposite to the front or back of the pole piece, for acquiring image information of the front or back of the pole piece. The visual device 1 is used for acquiring the image information of the front surface or the back surface of the pole piece, and the optimal cutting point can be determined only by the image information of the front surface or the back surface of the pole piece, so that the determination process is simple and the reaction speed is high. This embodiment is applicable to single-sided coated pole pieces and pole pieces with the front and back coating areas facing the coating.
In another embodiment, the vision device 1 comprises a first vision device 11 and a second vision device 12, the first vision device 11 is arranged opposite to the first surface of the pole piece for acquiring the first image information of the first surface (front surface) of the pole piece in a traveling manner, and the second vision device 12 is arranged opposite to the second surface of the pole piece for acquiring the second image information of the second surface (back surface) of the pole piece in a traveling manner. Two vision devices 1, namely a first vision device 11 and a second vision device 12, are arranged, and respectively acquire first image information on the front surface and second image information on the back surface of the pole piece, so that an optimal cutting point is determined through the first image information on the front surface and the second image information on the back surface, the position of the optimal cutting point determined by the arrangement mode is more accurate, the fact that the width of a coating area of a slit pole piece with a narrow width is identical and the area of the coating area is identical can be ensured, the slitting precision can be better improved, and the embodiment is applicable to pole pieces with coating areas on the front surface and the back surface, and particularly to pole pieces with slightly misplaced coating positions of the coating areas on the front surface and the back surface.
In addition, the vision device 1 is arranged at the upstream of the cutting position and has a certain distance from the cutting position, so that the enough reaction and calculation time can be given to the processor, the enough feedback time is ensured, the signal delay is avoided, and the precision is further improved.
Specifically, in practical applications, the first vision device 11 and the second vision device 12 may be an area camera, a CIS, a line scan camera, or the like. The specific structure of the first vision device 11 and the second vision device 12 can be set by a person skilled in the art according to actual needs. The specific structure of the first vision device 11 and the second vision device 12 may be modified and changed without departing from the basic principle of the present invention, and should be limited in scope.
In a preferred embodiment, the tape deck detection device 3 comprises a main drive traction mechanism and an encoder, wherein the main drive traction mechanism comprises a driving roller, a passive clamping roller and a motor, and the motor and the encoder are in communication connection with the processor.
The motor is connected with the drive roller and can drive the drive roller to rotate, the encoder is arranged on the drive roller and can detect the rotation data of the drive roller so as to obtain the tape feeding information of the pole piece, a gap is formed between the passive clamping roller and the drive roller, the pole piece is positioned in the gap, the passive clamping roller is contacted with the drive roller through the pole piece, and the drive roller can drive the pole piece to move and drive the passive clamping roller to synchronously rotate when rotating. The tape-feeding information of the pole piece comprises the tape-feeding speed of the pole piece, the tape-feeding time of the pole piece and the tape-feeding length of the pole piece.
The tape running detection device 3 is arranged as a main drive traction mechanism and an encoder, the main drive traction mechanism can cut off the tension of the pole piece, the pole piece is prevented from being controlled by the tension in a cutting area, the cutting effect is improved, the pole piece is made to run at a set speed, the encoder detects the tape running information of the pole piece in real time, the acquired image information, the fed-back signal and the cutting time are matched, and the cutting precision is improved.
Although in the above embodiment, the encoder is provided to detect and record the tape information of the pole piece, this should not limit the scope of the present invention, and in practical application, the encoder may be replaced with another device or the tape detection device 3 may be replaced with another device capable of detecting the tape information of the pole piece. For example, the encoder is replaced with a tachometer. Such modifications and changes in the specific structure of the tape deck 3 are not departing from the basic principles of the present invention, and should be limited to the scope of the present invention.
In a further preferred embodiment, referring to fig. 1, the tape deck detection device 3 is located between the vision apparatus 1 and the cutting position. The tape running detection device 3 is arranged between the vision device 1 and the cutting position, and can better control the pole piece to run at a preset speed between the front area and the rear area of the cutting position, so that the cutting time of the optimal cutting point can be better grasped.
In a preferred embodiment, referring to fig. 1, the pole piece slitting system of the present invention further comprises a stub bar detecting device 4 (e.g. a distance measuring sensor) and a hardware cutting device 5, wherein the stub bar detecting device 4 is configured to detect a stub bar area of the pole piece, and the hardware cutting device 5 is configured to be movable between a standby position and a knife-compensating position, and to be capable of cutting the stub bar area of the pole piece being fed at the knife-compensating position, the knife-compensating position being located downstream of the cutting position. The spare position is the position where the hardware cutting device 5 is far away from the pole piece, the hardware cutting device 5 is separated from the pole piece at the position, the pole piece cannot be cut, and the knife supplementing position is the position where the hardware cutting device 5 is contacted with the pole piece and can cut the pole piece.
The material head of the pole piece is usually stuck with adhesive tape so as to bond the head and the tail of the two pole pieces, thereby connecting the two pole pieces into a continuous pole piece, and the area of the pole piece stuck with the adhesive tape is the material head area; in the process of cutting the pole piece by the laser cutting device, the laser energy is overlarge, and burrs, uneven and the like are easy to occur on the edge of the cut pole piece, so that the energy of the laser is generally controlled within a certain range so as to ensure the yield of the cut pole piece, however, the stub bar area of the pole piece is easy to cut and not transparent when the laser cutting device is used for cutting, and thus two adjacent pole pieces after cutting cannot be completely separated; can cut the stub bar region of pole piece through setting up five metals cutting device 5 to cut the stub bar region thoroughly, improve and cut the quality, stub bar detection device 4 is used for detecting the position of stub bar region, so that confirm the stub bar region and reach the benefit sword opportunity of mending the sword position of five metals cutting device 5, thereby conveniently control five metals cutting device 5 and remove to mending sword position department in mending the sword opportunity, so that cut the pole piece, thereby cut the cutting effect of system with the stub bar region thoroughly undercut, in order to guarantee the pole piece.
It should be noted that, the specific structure of the hardware cutting device 5 is not limited in the present invention, and in practical application, a person skilled in the art can set the specific structure of the hardware cutting device 5 according to the actual needs. For example, the hardware cutting device 5 includes a plurality of blade holders, a hardware cutting knife fixed on the blade holders, and a sliding mechanism, where the hardware cutting knife is disposed toward the pole piece, and the sliding mechanism is disposed so as to drive the blade holders and the hardware cutting knife to move toward and away from the pole piece. Such modifications and changes in the specific structure of the hardware cutting device 5 do not depart from the basic principle of the present invention, and should be limited to the protection scope of the present invention.
It should be noted that, in the hardware cutting device 5 of the present invention, the number of the hardware cutting knives is the same as the number of the laser cutting devices 2, and the preset cutting points opposite to the hardware cutting knives are fixed cutting points, which are equally divided points of the pole pieces.
In addition, the invention also provides a control method for the pole piece slitting system, and the control method is applied to the pole piece slitting system.
Specifically, referring to fig. 2, the control method for the pole piece slitting system of the present invention includes the following steps:
S1: the tape running information of the pole piece is detected in real time by the tape running detection device 3.
The tape running information of the pole piece is detected by the tape running detecting device 3 so that the cutting timing is accurately determined based on the tape running information. The tape running information comprises the tape running speed of the pole piece and/or the tape running time of the pole piece and/or the tape running length of the pole piece.
S2: the vision device 1 acquires the image information of the pole piece once every set parameter.
The vision device 1 acquires the image information of the pole piece once every set parameter, namely the vision device 1 intermittently acquires the image information of the pole piece.
In one embodiment, the image information is of one side (front or back) of the pole piece.
In another embodiment, the image information includes first image information of a front side of the pole piece and second image information of a back side of the pole piece.
It should be noted that, the present invention does not limit the number of image information, and in practical application, a person skilled in the art can set the number of image information according to the coating condition of the pole piece, and the specific implementation form of the above embodiment should not limit the protection scope of the present invention.
S3: and determining the optimal cutting point of the pole piece area corresponding to the image information based on the image information.
Illustratively, step S3 specifically includes: s31: identifying image information, and determining the width of the pole piece and the edge position of the pole piece; s32: according to the number of the cutting widths, the pole pieces are equally divided along the width direction of the pole pieces, and 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 pieces can be determined; s33: and along the tape moving direction of the pole piece, the position coordinate corresponding to the midpoint of the pole piece area corresponding to the image information is the position coordinate of the optimal cutting point in the length direction of the pole piece, and the optimal cutting point is determined.
Illustratively, step S3 specifically includes: s301: identifying an image, and 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 areas equally and dividing the pole piece between two adjacent coating areas equally, and determining 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: and along the tape moving direction of the pole piece, the midpoint of the pole piece area corresponding to the image information is the position coordinate of the optimal cutting point in the length direction of the pole piece, and the optimal cutting point is determined.
It should be noted that, the specific execution steps of the step S3 are not limited in the present invention, and in practical applications, a person skilled in the art may set the specific execution steps of the step S3 according to actual needs, and the specific implementation form of the step S3 in the foregoing exemplary description should not limit the protection scope of the present invention.
S4: based on the tape feed information and the distance from the vision device 1 to the cutting position, the cutting timing corresponding to the optimal cutting point is determined.
Illustratively, step S4 specifically includes: s41: determining a preset time required for the optimal cutting point to reach the cutting position based on the tape feeding speed and the distance from the vision device 1 to the cutting position; s42: and adding the preset time and the detection time of the image information corresponding to the optimal cutting point to obtain the cutting time corresponding to the optimal cutting point.
Illustratively, step S4 specifically includes: s401: calculating a first length difference between the current deck length and the deck length corresponding to the detected image information; s402: calculating a second length difference between the distance of the vision device 1 to the cutting position and the first length difference; s403: judging whether the second length difference is equal to 0, and when the second length difference is equal to 0, determining the current moment as the cutting time corresponding to the optimal cutting point.
It should be noted that, the specific execution steps of the step S4 are not limited in the present invention, and in practical applications, a person skilled in the art may set the specific execution steps of the step S4 according to actual needs, and the specific implementation forms in the foregoing exemplary description should not limit the scope of the present invention.
S5: the laser cutting device 2 is controlled to move the laser to the optimal cutting point corresponding to the cutting time.
In the control method, in the process of feeding the pole piece, the optimal cutting point of the pole piece and the cutting time corresponding to the optimal cutting point are determined every other set parameter, so that when the optimal cutting point moves to the cutting position (namely, when the cutting time corresponding to the optimal cutting point is reached), the laser cutting device 2 controls the laser to move to the optimal cutting point and cuts the pole piece at the optimal cutting point, thereby ensuring the cutting precision, further ensuring that the cut pole piece has consistent width and improving the performance of the lithium battery.
In a preferred embodiment, the setting parameter is a set deck length; the step of the vision device 1 for acquiring the image information of the primary pole piece every set parameter specifically comprises the following steps: the vision device 1 acquires the image information of the primary pole piece every set tape length. The image information of the pole piece is acquired once every set tape feeding length, and the visual device 1 is triggered according to the fixed frequency to acquire the image information of the pole piece, so that the control is convenient. Specifically, in practical application, the encoder of the tape running detection device 3 can trigger the signal of the acquisition pole piece, so that the acquisition node of the vision device 1 is matched with the tape running speed, and the accuracy of grasping the cutting timing is improved.
In another embodiment, the set parameter is a set time; the step of the vision device 1 for acquiring the image information of the primary pole piece every set parameter specifically comprises the following steps: the vision device 1 acquires the image information of the pole piece once every set time. The image information of the pole piece is acquired once every fixed time, and the visual device 1 is triggered according to the fixed frequency to acquire the image information of the pole piece, so that the control is convenient.
The control method of the present invention will be described in detail by means of several specific examples.
Example 1
The control method of the present embodiment is applicable to a pole piece slitting system in which the vision device 1 includes only the first vision device 11, wherein the first vision device 11 is disposed toward the first face (front face) or the second face (back face) of the pole piece so as to acquire image information of the front face or the back face of the pole piece.
Referring to fig. 3, the control method for the pole piece slitting system of the present embodiment includes the following steps:
s1: the tape running information of the pole piece is detected in real time by the tape running detection device 3.
The tape running information comprises 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.
S2: the first vision device 11 acquires image information of the front or back surface of the primary pole piece every set tape length.
The acquiring frequency of the first vision device 11 may be triggered by the tape running detection device 3, when the tape running detection device 3 detects that the pole piece has a set tape running length every time, a signal is sent to the processor, the processor transmits the signal to the first vision device 11, and the first vision device 11 shoots the pole piece after receiving the signal so as to acquire the image information of the pole piece.
Illustratively, the encoder outputs a signal every time the motor of the primary traction mechanism and the drive roller rotate a particular angle.
S3: and determining the optimal cutting point of the pole piece area corresponding to the image information based on the image information.
In one embodiment, referring to fig. 3, step S3 specifically includes:
s31: and identifying image information, and determining the edge position of the pole piece, the width of the pole piece, the edge position of the coating area and the width of the coating area.
S32: and determining an optimal cutting point of the pole piece region corresponding to the image information based on the edge position of the pole piece, the width of the pole piece, the edge position of the coating region and the width of the coating region.
In an exemplary case where only one coating area is provided in the width direction of the pole piece, there is only one optimal cutting point of each image, and the position coordinate of the optimal cutting point in the width direction of the pole piece is the position coordinate corresponding to the midpoint of the coating area in the width direction, and the position coordinate of the optimal cutting point in the length direction of the pole piece is the position coordinate corresponding to the midpoint of the pole piece area in the length direction, corresponding to the image information.
In the case of having N coating areas in the width direction of the pole piece, the optimal cutting points of each image have 2N-1, the 2N-1 optimal cutting points are distributed at intervals along the width direction of the pole piece, 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, and the position coordinates of the optimal cutting points in the length direction of the pole piece are the position coordinates corresponding to the midpoints of the pole piece areas corresponding to the image information in the length direction.
S4: based on the tape feed information and the distance from the first vision device 11 to the cutting position, the cutting timing corresponding to the optimal cutting point is determined.
S5: the laser cutting device 2 is controlled to move the laser to the optimal cutting point corresponding to the cutting time.
In one embodiment, the deck information includes a deck speed, and step S4 "determining the cutting timing corresponding to the optimal cutting point based on the deck information and the distance from the first vision device 11 to the cutting position" specifically includes:
s41: the preset time required for the optimal cutting point to reach the cutting position is determined based on the speed of the tape and the distance of the first vision device 11 to the cutting position.
Specifically, the distance from the first vision device 11 to the cutting position divided by the tape running speed is the preset time required for the optimal cutting point to reach the cutting position.
S42: and adding the preset time and the detection time of the image information corresponding to the optimal cutting point to obtain the cutting time corresponding to the optimal cutting point.
In another embodiment, the deck information includes deck speed and deck time, and step S4 "determining the cutting timing corresponding to the optimal cutting point based on the deck information and the distance from the first vision device 11 to the cutting position" specifically includes:
s41: the preset time required for the optimal cutting point to reach the cutting position is determined based on the speed of the tape and the distance of the first vision device 11 to the cutting position.
S42: and calculating a first difference value between the current tape running time of the pole piece and the tape running time corresponding to the detected image information.
Illustratively, the encoder detects and records the running time of the pole piece, the running speed of the pole piece and the running length of the pole piece in real time, and the required data (such as the current running time and the running time during detection) can be directly obtained from the recorded information of the encoder.
S43: and calculating a second difference value between the preset time and the first difference value.
S44: judging whether the second difference value is equal to 0, and when the second difference value is equal to 0, determining the current moment as the cutting time corresponding to the optimal cutting point.
It should be noted that, the specific manner of determining the cutting timing in the step S4 is not limited in the present invention, and in practical application, a person skilled in the art may set the specific execution step of the step S4 according to the actual needs. The implementation manner of the specific execution step of step S4 in the above embodiment should not limit the protection scope of the present invention.
Example 2
The control method of the present embodiment is applicable to a pole piece slitting system in which the vision device 1 includes a first vision device 11 and a second vision device 12, wherein the first vision device 11 is disposed toward a first face (front face) of the pole piece so as to acquire image information of the front face of the pole piece; the second vision device 12 is positioned toward the second (opposite) side of the pole piece to acquire image information of the opposite side of the pole piece.
Referring to fig. 4, the control method for the pole piece slitting system of the embodiment includes the following steps:
s1: the tape running information of the pole piece is detected in real time by the tape running detection device 3.
The tape running information comprises the tape running length of the pole piece, the tape running speed of the pole piece and the tape running time of the pole piece.
S21: the first vision device 11 acquires first image information of the first face of the primary pole piece every set tape length.
The acquiring frequency of the first vision device 11 may be triggered by the tape running detection device 3, when the tape running detection device 3 detects that the pole piece has a set tape running length every time, a signal is sent to the processor, the processor transmits the signal to the first vision device 11, and the first vision device 11 shoots the pole piece after receiving the signal so as to acquire the image information of the pole piece.
Illustratively, the encoder outputs a signal every time the motor of the primary traction mechanism and the drive roller rotate a particular angle.
S22: the second vision device 12 acquires second image information of the second face of the primary pole piece every set tape length.
The second vision device 12 may be triggered by the tape running detection device 3, and when the tape running detection device 3 detects that the pole piece has a set tape running length every time, a signal is sent to the processor, the processor transmits the signal to the first vision device 11, and the first vision device 11 photographs the pole piece after receiving the signal, so as to obtain the image information of the pole piece.
Illustratively, the encoder outputs a signal every time the motor of the primary traction mechanism and the drive roller rotate a particular angle.
S31: and determining a first cutting point of the pole piece area corresponding to the first image information on the first surface based on the first image information.
Specifically, referring to fig. 4, step S31 specifically includes:
s311: and identifying the first image information, and determining 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.
S312: and determining a first cutting point of the pole piece region corresponding to the first image information on the first surface based on the edge position of the first pole piece, the width of the first pole piece, the edge position of the first coating region and the width of the first coating region.
In an exemplary case where only one coating region is provided in the width direction of the pole piece, only one first cutting point of each first image is provided, and the position coordinate of the first cutting point in the width direction of the pole piece is the position coordinate corresponding to the midpoint of the coating region in the width direction, and the position coordinate of the first cutting point in the length direction of the pole piece is the position coordinate corresponding to the midpoint of the pole piece region in the length direction, corresponding to the first image information.
In an exemplary case of having N coating areas in the width direction of the pole piece, the first cutting points of each first image have 2N-1, the 2N-1 first cutting points thereof are distributed at intervals along the width direction of the pole piece, and the position coordinates of the first cutting points thereof 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, and the position coordinates of the first cutting points in the length direction of the pole piece are the position coordinates corresponding to the midpoints of the pole piece areas corresponding to the image information in the length direction.
S32: and determining a second cutting point of the pole piece region corresponding to the second image information on the second surface based on the second image information.
Specifically, referring to fig. 4, step S32 specifically includes:
s321: and identifying the second image information, and determining 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.
S322: and determining a second cutting point of the pole piece region corresponding to the second image information on the second face based on the edge position of the second pole piece, the width of the second pole piece, the edge position of the second coating region and the width of the second coating region.
In an exemplary case where only one coating region is provided in the width direction of the pole piece, only one second cutting point of each second image is provided, and the position coordinate of the second cutting point in the width direction of the pole piece is the position coordinate corresponding to the midpoint of the coating region in the width direction, and the position coordinate of the second cutting point in the length direction of the pole piece is the position coordinate corresponding to the midpoint of the pole piece region in the length direction, corresponding to the second image information.
In an exemplary case of having N coating areas in the width direction of the pole piece, the second cutting points of each second image have 2N-1, wherein the 2N-1 second cutting points are distributed at intervals 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 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, and the position coordinates of the second cutting points in the length direction of the pole piece are the position coordinates corresponding to the midpoints of the pole piece areas corresponding to the image information in the length direction.
S33: and determining the optimal cutting point corresponding to the pole piece region based on the first cutting point and the second cutting point corresponding to the same pole piece region.
The same pole piece region is the same pole piece region corresponding to the first image information and the pole piece region corresponding to the second image information, and the optimal cutting point is the midpoint of the connecting line of the first cutting point and the second cutting point.
S4: based on the tape feed information and the distance from the first vision device 11 to the cutting position, the cutting timing corresponding to the optimal cutting point is determined.
In another embodiment, step S4 may be replaced by: based on the deck information and the distance of the second vision device 12 to the cutting position, a cutting timing corresponding to the optimal cutting point is determined.
S5: the laser cutting device 2 is controlled to move the laser to the optimal cutting point corresponding to the cutting time.
In one embodiment, the step S4 "determining the cutting timing corresponding to the optimal cutting point based on the deck information and the distance from the first vision device 11 to the cutting position" specifically includes:
s41: the first preset time required for the first cutting point to reach the cutting position is determined based on the speed of the tape and the distance of the first vision device 11 to the cutting position.
The position of the first vision device 11 is fixed, and the distance from the first vision device 11 to the cutting position is a known parameter and stored in the processor, so that the distance can be obtained at any time.
Specifically, the distance from the first vision device 11 to the cutting position divided by the tape running speed is the first preset time.
S42: and adding the first preset time and the detection time of the first image information corresponding to the first cutting point to obtain the cutting time corresponding to the optimal cutting point determined by the first cutting point.
In another embodiment, the step S4 "determining the cutting timing corresponding to the optimal cutting point based on the deck information and the distance from the first vision device 11 to the cutting position" specifically includes:
s41: the first preset time required for the first cutting point to reach the cutting position is determined based on the speed of the tape and the distance of the first vision device 11 to the cutting position.
S42: and calculating a first difference value between the current tape running time of the pole piece and the tape running time corresponding to the detected first image information.
S43: a second difference between the first preset time and the first difference is calculated.
S44: judging whether the second difference value is equal to 0, and when the second difference value is equal to 0, determining that the current moment is the cutting time corresponding to the optimal cutting point determined by the first cutting point.
In still another embodiment, the step S4 "determining the cutting timing corresponding to the optimal cutting point based on the deck information and the distance from the first vision device 11 to the cutting position" specifically includes:
s41: a first length difference between the current deck length and the deck length corresponding to when the first image information is detected is calculated.
S42: a second length difference between the distance of the first vision device 11 to the cutting position and the first length difference is calculated.
S43: judging whether the second length difference is equal to 0, and when the second length difference is equal to 0, determining that the current moment is the cutting time corresponding to the optimal cutting point determined by the first cutting point.
In still another embodiment, the step S4 "determining the cutting timing corresponding to the optimal cutting point based on the deck information and the distance from the first vision device 11 to the cutting position" specifically includes:
s41: a first time difference between the current deck time and a deck time corresponding to when the first image information is detected is calculated.
S42: and calculating the tape moving distance of the first cutting point according to the first time difference value and the tape moving speed.
S43: judging whether the tape moving distance of the first cutting point is equal to the distance from the first vision device 11 to the cutting position, if yes, the current moment is the cutting time corresponding to the optimal cutting point determined by the first cutting point.
In one embodiment, the step S4 "determining the cutting timing corresponding to the optimal cutting point based on the deck information and the distance from the second vision device 12 to the cutting position" specifically includes:
s41: the second preset time required for the second cutting point to reach the cutting position is determined based on the speed of the tape and the distance of the second vision device 12 from the cutting position.
S42: and adding the second preset time to the detection time of the second image information corresponding to the second cutting point to obtain the cutting time corresponding to the optimal cutting point determined by the second cutting point.
In another embodiment, the step S4 "determining the cutting timing corresponding to the optimal cutting point based on the deck information and the distance from the second vision device 12 to the cutting position" specifically includes:
s41: the second preset time required for the second cutting point to reach the cutting position is determined based on the speed of the tape and the distance of the second vision device 12 from the cutting position.
S42: and calculating a third difference value between the current tape running time of the pole piece and the tape running time corresponding to the detected second image information.
S43: and calculating a fourth difference value between the second preset time and the third difference value.
S44: and judging whether the fourth difference value is equal to 0, and when the fourth difference value is equal to 0, determining that the current moment is the cutting time corresponding to the optimal cutting point determined by the second cutting point.
In still another embodiment, the step S4 "determining the cutting timing corresponding to the optimal cutting point based on the deck information and the distance from the second vision device 12 to the cutting position" specifically includes:
s41: and calculating a third length difference between the current deck length and the deck length corresponding to the second image information.
S42: a fourth length difference between the distance of the second vision device 12 to the cutting location and the third length difference is calculated.
S43: judging whether the fourth length difference is equal to 0, and when the fourth length difference is equal to 0, determining that the current moment is the cutting time corresponding to the optimal cutting point determined by the second cutting point.
In still another embodiment, the step S4 "determining the cutting timing corresponding to the optimal cutting point based on the deck information and the distance from the second vision device 12 to the cutting position" specifically includes:
s41: and calculating a second time difference value between the current tape time and the corresponding tape time when the second image information is detected.
S42: and calculating the tape moving distance of the second cutting point according to the second time difference value and the tape moving speed.
S43: and judging whether the tape moving distance of the second cutting point is equal to the distance from the second vision device 12 to the cutting position, if so, determining that the current moment is the cutting time corresponding to the optimal cutting point determined by the second cutting point.
Example 3
The control method of the embodiment is applicable to the pole piece slitting system of any embodiment.
Specifically, referring to fig. 5, the control method for the pole piece slitting system according to the present embodiment further includes the following steps based on embodiment 1 and embodiment 2:
s61: judging whether the pole piece of the tape is qualified or not based on the image information.
S62: and (5) selectively alarming and stopping according to the judging result.
After the image information is obtained, whether the pole piece of the tape is qualified or not is judged in real time according to the image information, so that when the unqualified pole piece of the incoming material is detected, the alarm and the shutdown are timely carried out, the qualified pole piece can be timely replaced, and more defective products are avoided.
In a further preferred embodiment, the step S61 "determining whether the pole piece of the tape is acceptable based on the image information" specifically includes:
s611: and identifying image information, and determining the width of the pole piece and the width of the coating area.
S612: the width of the pole piece is compared with a first set width.
S613: the width of the coated area is compared with a second set width.
S614: and judging whether the pole piece on the tape is qualified or not according to the comparison result.
Specifically, step S614 "determining whether the pole piece of the tape is qualified or not according to 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, judging that the pole piece on the tape is qualified; s6142: and 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, judging that the pole piece on the tape is unqualified.
In a further preferred embodiment, step S62 "selectively alarm and stop according to the determination result" specifically includes:
s621: and if the judgment result is that the pole piece is unqualified, alarming and stopping the machine.
S622: if the judgment result is that the pole piece is qualified, no alarm is given, and the machine is not stopped.
It should be noted that step S61 is performed after step S2 and is performed in synchronization with step S3.
After the image information is acquired, the control method for the pole piece slitting system further judges whether the pole piece in the tape is qualified according to the image information, can judge whether the pole piece in the material is qualified, avoids further processing the unqualified pole piece, and can avoid more defective products and waste of energy and time.
Example 4
The control method of the embodiment is applicable to the pole piece slitting system of any embodiment.
With continued reference to fig. 5, in the process of splitting the pole piece by the laser emitted by the laser cutting device, the control method for the pole piece splitting system of the embodiment further includes the following steps:
s71: based on the deck information, a cutting parameter is determined. Wherein the deck information includes deck speed.
And determining corresponding cutting parameters through the current tape feeding speed.
Illustratively, a "running speed and cutting parameter comparison table" is stored in the processor, and the cutting parameter matched with the running speed can be found in the "running speed and cutting parameter comparison table" according to the current running speed, so that the cutting parameter is output to the laser cutting device 2, so that the laser cutting device 2 emits laser according to the determined cutting parameter. Wherein the cutting parameters include, but are not limited to, laser energy.
S72: the laser cutting device 2 is caused to emit laser light in accordance with the cutting parameters.
In the process of cutting the pole piece by laser, cutting parameters are determined in real time according to the tape running speed, so that the laser emitted by the laser cutting device 2 is matched with the current tape running condition, and the cut pole piece is ensured to have no flaws such as burrs and the like.
It should be noted that, step S71 and step S72 may be set to run in real time, so that the laser can be adjusted in real time to match the current tape speed; alternatively, step S71 and step S72 may be set to run at intervals, and the laser may be adjusted every specific length of the tape or at specific times to reduce the amount of calculation.
Example 5
The control method of the embodiment is suitable for the pole piece slitting system comprising the stub bar detection device 4 and the hardware cutting device 5.
With continued reference to fig. 5, the control method for the pole piece slitting system according to the present embodiment further includes the following steps on the basis of embodiment, embodiment 2, embodiment 3 or embodiment 4:
s81: the stub bar detection device 4 detects the stub bar area of the pole piece in real time to obtainTime information [ t ] to detect stub bar area 1 ,t 2 ]。
Wherein the time information is a time period, t 1 A starting time point of the time period, specifically a time point when the stub bar area is just detected; t is t 2 The end time point of the time period is specifically a time point when no stub bar area is detected.
S82: based on time information t 1 ,t 2 ]The distance from the feeding information and the stub bar detection device 4 to the cutting position determines the avoidance timing t of the laser cutting device 2 3 ，t 4 ]。
Specifically, the avoidance timing is also a time period, in which time period [ t ] 3 ，t 4 ]The inner stub bar area passes through the cutting position, t 3 The starting time point of the time period is specifically the time point when the starting end of the stub bar area reaches the cutting position; t is t 4 For the end time of the period, in particular the time when the end of the stub bar region reaches the cutting position, and during the period [ t ] 3 ，t 4 ]The inner laser cutting device 2 stops lasing or moves to a standard cutting point.
Illustratively, step S82 specifically includes:
s821: determining a first preset time t required for the head of the stub bar area to reach the cutting position based on the tape feed speed and the distance from the stub bar detection means 4 to the cutting position A 。
Specifically, the distance from the stub bar detection device 4 to the cutting position is divided by the tape speed, i.e., the first preset time t required for the head of the stub bar area to reach the cutting position A 。
S822: based on time information t 1 ,t 2 ]A first preset time t A Determining the evasion timing t of the laser cutting device 2 3 ，t 4 ]。
Specifically, t 3 =t 1 +t A ，t 4 =t 2 +t A 。
S83: the laser cutting device 2 stops emitting laser at the avoidance timing or controls the laser to move to the standard cutting point at the avoidance timing.
S84: based on time information t 1 ,t 2 ]The distance from the feeding information and the stub bar detection device 4 to the cutter supplementing position determines the cutter supplementing time t of the hardware cutting device 5 5 ，t 6 ]。
Specifically, the tool supplementing time is also a time period, and the time period [ t ] 5 ，t 6 ]In, the stub bar area of the pole piece passes through the position of the cutter supplementing, t 5 The starting time point of the time period is specifically the time point when the starting end of the stub bar area reaches the cutter supplementing position; t is t 6 For the end time of the period, in particular, the time when the end of the stub bar region reaches the position of the supplemental knife, and during the period [ t ] 5 ，t 6 ]The inner hardware cutting device 5 is positioned at the position of the cutter supplementing and cuts the pole piece of the tape.
Illustratively, step S84 specifically includes:
s841: determining a second preset time t required for the head of the stub bar area to reach the cutter supplementing position based on the tape feed speed and the distance from the stub bar detection device 4 to the cutter supplementing position B 。
Specifically, the distance from the stub bar detecting device 4 to the cutter repairing position is divided by the feeding speed, i.e. the second preset time t required for the head of the stub bar region to reach the cutter repairing position B 。
S842: based on time information t 1 ,t 2 ]A second preset time t B Determining the tool supplementing time t of the hardware cutting device 5 5 ，t 6 ]。
Specifically, t 5 =t 1 +t B ，t 6 =t 2 +t B 。
S85: the hardware cutting device 5 is moved to the tool supplementing position at the tool supplementing time, so that the hardware cutting device 5 cuts the stub bar area.
The laser cutting device 2 stops emitting laser at the avoiding time, so that the winding operation of the cut pole piece can be prevented from being influenced due to different cutting positions of the laser cutting device 2 and the hardware cutting device 5, the laser cutting device 2 controls the laser to move to the standard cutting point at the avoiding time, and the cutting point of the laser cutting device 2 is overlapped with the cutting point of the hardware cutting device 5, so that the cutting quality is improved.
According to the control method for the pole piece, through detecting the stub bar area of the pole piece in real time and determining the tool supplementing time of the hardware cutting device 5 and the avoiding time of the laser cutting device 2 according to the detection result and related parameters, the pole piece can be smoothly cut, the stub bar area is ensured to be thoroughly cut, the incomplete cutting is avoided, the use is convenient, and the control is convenient.
It should be noted that, when step S81 and step S1 are executed simultaneously and step S5 is stopped during execution of step S83, and in a specific implementation process, step S82 and step S84 may be executed simultaneously, or step S84 may be executed first and then step S82 may be executed.
Thus far, the technical solution of the present invention has been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of protection of the present invention is not limited to these specific embodiments. Equivalent modifications and substitutions for related technical features may be made by those skilled in the art without departing from the principles of the present invention, and such modifications and substitutions will fall within the scope of the present invention.
Claims (10)
1. The control method for the pole piece cutting system is characterized in that the pole piece cutting system comprises a vision device, a laser cutting device and a tape running detection device; the laser cutting device is arranged to emit laser to cut the pole piece which is walked to the cutting position, and is also arranged to control the emitted laser to move along the width direction of the pole piece so as to change the position of the cutting point; the visual device is positioned at the upstream of the cutting position and is used for acquiring image information of the pole piece of the tape; the tape running detection device is arranged to be capable of detecting tape running information of the pole piece;
The control method comprises the following steps:
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 parameter;
based on the image information, determining an optimal cutting point of a pole piece area corresponding to the image information;
determining a cutting time corresponding to the optimal cutting point based on the tape feeding information and the distance from the vision device to the cutting position;
and enabling the laser cutting device to control the laser to move to the optimal cutting point corresponding to the cutting time at the cutting time.
2. The control method for a pole piece slitting system according to claim 1, wherein the set parameter is a set tape length or a set time;
the step of acquiring the image information of the pole piece once every set parameter by the vision device specifically comprises the following steps:
the visual device acquires the image information of the pole piece once every set tape length or set time.
3. The control method for a pole piece slitting system according to claim 1, further comprising:
judging whether the pole piece on the tape is qualified or not based on the image information;
And (5) selectively alarming and stopping according to the judging result.
4. The control method for a pole piece slitting system according to claim 1, wherein the laser emitted by the laser cutting device when slitting the pole piece, the control method further comprises:
determining cutting parameters based on the deck information;
and enabling the laser cutting device to emit laser according to the cutting parameters.
5. The control method for a pole piece slitting system according to claim 1, further comprising a stub bar detection device for detecting a stub bar area of the pole piece and a hardware cutting device arranged to be movable between a standby position and a make-up position and to be able to cut a stub bar area of the pole piece being taken along at the make-up position, the make-up position being located downstream of the cutting position;
the control method further includes:
the stub bar detection device detects the stub bar area of the pole piece in real time to obtain time information of detecting the stub bar area;
determining the avoiding time of the laser cutting device based on the time information, the tape moving information and the distance from the stub bar detection device to the cutting position;
Stopping the laser cutting device from emitting laser at the avoidance time or controlling the laser to move to a standard cutting point at the avoidance time;
determining the cutter supplementing time of the hardware cutting device based on the time information, the tape feed information and the distance from the stub bar detection device to the cutter supplementing position;
and enabling the hardware cutting device to move to the cutter supplementing position at the cutter supplementing time, so that the hardware cutting device cuts the stub bar area.
6. The control method for a pole piece slitting system according to any one of claims 1 to 5, wherein the vision device comprises a first vision device for acquiring first image information of a first face of the pole piece being walked and a second vision device for acquiring second image information of a second face of the pole piece being walked;
the step of acquiring the image information of the pole piece once every set parameter by the vision device specifically comprises the following steps:
the first vision device acquires first image information of the first surface of the pole piece once every set parameter;
the second vision device acquires second image information of the second surface of the pole piece once every set parameter;
The step of determining the optimal cutting point of the pole piece area corresponding to the image information based on the image information specifically comprises the following steps:
determining a first cutting point of a pole piece area corresponding to the first image information on a first surface based on the first image information;
determining a second cutting point of a pole piece area corresponding to the second image information on a second surface based on the second image information;
determining an optimal cutting point corresponding to the 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 time corresponding to the optimal cutting point based on the tape feeding information and the distance from the vision device to the cutting position specifically includes:
determining a cutting time corresponding to the optimal cutting point based on the tape feeding information and the distance from the first vision device to the cutting position; or determining the cutting time corresponding to the optimal cutting point based on the tape feeding information and the distance from the second vision device to the cutting position.
7. The method according to claim 6, wherein the step of determining a first cutting point of the pole piece region on the first face corresponding to the first image information based on the first image information specifically includes:
Identifying the first image information, and determining 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;
determining a first cutting point of a pole piece area corresponding to the first image information on a first surface based on 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;
the step of determining a second cutting point of the pole piece region corresponding to the second image information on the second surface based on the second image information specifically includes:
identifying the second image information, and determining 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;
and determining a second cutting point of the pole piece region corresponding to the second image information on a second face based on the edge position of the second pole piece, the width of the second pole piece, the edge position of the second coating region and the width of the second coating region.
8. The control method for a pole piece slitting system according to claim 6, wherein the tape information includes a tape speed of the pole piece;
The step of determining the cutting time corresponding to the optimal cutting point based on the tape feeding information and the distance from the first vision 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 moving speed and the distance from the first vision 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 time corresponding to the optimal cutting point determined by the first cutting point;
or, the step of determining the cutting time corresponding to the optimal cutting point based on the tape feeding information and the distance from the second vision 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 moving speed and the distance from the second vision device to the cutting position;
and adding the second preset time to the detection time of the second image information corresponding to the second cutting point to obtain the cutting time corresponding to the optimal cutting point determined by the second cutting point.
9. The control method for a pole piece slitting system according to claim 6, wherein said tape information includes a tape length of said pole piece;
the step of determining the cutting time corresponding to the optimal cutting point based on the tape feeding information and the distance from the first vision device to the cutting position specifically includes:
calculating a first length difference between the current deck length and the deck length corresponding to the first image information;
calculating a second length difference between the distance of the first vision device to the cutting location and the first length difference;
judging whether the second length difference value is equal to 0, and when the second length difference value is equal to 0, determining that the current moment is the cutting time corresponding to the optimal cutting point determined by the first cutting point;
or, the step of determining the cutting time corresponding to the optimal cutting point based on the tape feeding information and the distance from the second vision device to the cutting position specifically includes:
calculating a third length difference between the current deck length and the deck length corresponding to the second image information;
Calculating a fourth length difference between the distance of the second vision device to the cutting location and the third length difference;
judging whether the fourth length difference value is equal to 0, and when the fourth length difference value is equal to 0, determining that the current moment is the cutting time corresponding to the optimal cutting point determined by the second cutting point.
10. A pole piece slitting system comprising a processor, characterized in that the processor is configured to be able to perform the control method for a pole piece slitting system according to any one of claims 1 to 9.
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| CN202410172824.0A CN117718609A (en) | 2024-02-07 | 2024-02-07 | Control method for pole piece slitting system and pole piece slitting system |
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| CN202410172824.0A CN117718609A (en) | 2024-02-07 | 2024-02-07 | Control method for pole piece slitting system and pole piece slitting system |
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