CN115479896A - Detection device and detection method for slitting burrs of lithium battery pole piece - Google Patents
Detection device and detection method for slitting burrs of lithium battery pole piece Download PDFInfo
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- CN115479896A CN115479896A CN202211256019.3A CN202211256019A CN115479896A CN 115479896 A CN115479896 A CN 115479896A CN 202211256019 A CN202211256019 A CN 202211256019A CN 115479896 A CN115479896 A CN 115479896A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/01—Arrangements or apparatus for facilitating the optical investigation
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07C—POSTAL SORTING; SORTING INDIVIDUAL ARTICLES, OR BULK MATERIAL FIT TO BE SORTED PIECE-MEAL, e.g. BY PICKING
- B07C5/00—Sorting according to a characteristic or feature of the articles or material being sorted, e.g. by control effected by devices which detect or measure such characteristic or feature; Sorting by manually actuated devices, e.g. switches
- B07C5/34—Sorting according to other particular properties
- B07C5/342—Sorting according to other particular properties according to optical properties, e.g. colour
- B07C5/3422—Sorting according to other particular properties according to optical properties, e.g. colour using video scanning devices, e.g. TV-cameras
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07C—POSTAL SORTING; SORTING INDIVIDUAL ARTICLES, OR BULK MATERIAL FIT TO BE SORTED PIECE-MEAL, e.g. BY PICKING
- B07C5/00—Sorting according to a characteristic or feature of the articles or material being sorted, e.g. by control effected by devices which detect or measure such characteristic or feature; Sorting by manually actuated devices, e.g. switches
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- G—PHYSICS
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
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- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
- G01N21/89—Investigating the presence of flaws or contamination in moving material, e.g. running paper or textiles
- G01N21/892—Investigating the presence of flaws or contamination in moving material, e.g. running paper or textiles characterised by the flaw, defect or object feature examined
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Abstract
The invention provides a detection device and a detection method for cutting burrs of a lithium battery pole piece, which comprise a fixed side plate and a roller passing assembly, wherein the roller passing assembly is rotationally arranged on the fixed side plate and comprises a first driving roller, a second driving roller and at least one tension roller; the burr detection component and the pole piece buffer component are also included; the burr detection assembly is positioned between the first driving roller and the tension roller and is used for respectively detecting burrs on two side edges of the pole piece passing through the first driving roller; the pole piece buffering assembly is arranged below the tension roller and can move up and down relative to the fixed side plate, the pole piece buffering assembly comprises an installation plate and at least one floating roller which is rotatably arranged on the installation plate, and the pole piece after cutting sequentially bypasses the first transmission roller, the burr detection assembly, the tension roller, the floating roller and the second transmission roller and is connected with the winding mechanism. The invention can meet the online burr detection of the pole piece, does not need to invest hardware and software with high cost on an industrial camera, reduces the production cost and has higher applicability and economical efficiency.
Description
Technical Field
The invention relates to the technical field of lithium battery detection, in particular to a device and a method for detecting slitting burrs of a lithium battery pole piece.
Background
In the production facility of lithium cell, the pole piece cutting machine produces the burr when cutting copper foil or aluminium foil pole piece more easily, and when the lithium-ion battery pole piece that has the burr was used to the battery, the burr can be pricked the barrier film and lead to the battery short circuit to scrap, still can produce the safety problem even. Therefore, the detection of burrs on the lithium ion battery pole piece is of great importance.
The existing burr detection mode of the lithium battery pole piece generally adopts an industrial camera to shoot images of the edge of the pole piece, and then burr detection is carried out by a detection algorithm. However, due to the limitations of the frame rate and the sampling precision of the industrial camera, the requirement of high-speed and high-precision burr detection cannot be met. The pole piece after cutting is rolled up through the winding mechanism at a high speed, the winding mechanism is consistent with the cutting mechanism in speed, and the existing detection technology cannot meet the production requirement under the condition of high-speed cutting and small burr size.
Chinese patent publication No. CN113313713B discloses an online detection method and system for burrs of a lithium battery pole piece, which adopts an area array industrial camera with extremely short exposure time, an extremely high brightness light source, a telecentric lens with large depth of field and high magnification, designs a model selection method and a layout method of the camera, the lens and the light source, sets camera parameters by calculation, improves an acquisition frame rate in multiples, and realizes high-speed online detection of the burrs of the pole piece by matching with an automatic focusing based on a burr detection algorithm of image projection analysis. Although the above prior art scheme can meet the requirement of burr on-line high-precision detection, the burr on-line high-precision detection method is essentially still technically improved on an industrial camera, a high-performance camera needs to be developed in a customized manner, a complex detection algorithm needs to be constructed by matching the camera, hardware and software are excessively invested in a matched manner, the cost of a detection device in a pole piece production process is excessively high undoubtedly, and the burr on-line high-precision detection method does not have high applicability and economy.
Disclosure of Invention
In view of the above, the invention provides a device and a method for detecting cut burrs of a lithium battery pole piece, so as to solve the problems that in the high-speed and high-precision burr detection process, a high-performance camera needs to be developed in a customized manner in the device for detecting cut burrs of the lithium battery pole piece in the prior art, the production cost is too high, and the device is not high in applicability and economical efficiency.
The technical scheme of the invention is realized as follows:
on one hand, the invention provides a lithium battery pole piece slitting burr detection device which comprises a fixed side plate and a roller passing assembly, wherein the roller passing assembly is rotatably arranged on the fixed side plate;
the roller passing assembly comprises a first driving roller, a second driving roller and at least one tension roller, and the at least one tension roller is positioned between the first driving roller and the second driving roller;
the burr detection device also comprises a burr detection assembly and a pole piece buffer assembly; the burr detection assembly is positioned between the first transmission roller and the tension roller;
the pole piece buffering assembly comprises a mounting plate and at least one floating roller, the mounting plate is arranged below the tension roller in a sliding mode on the fixed side plate and can move up and down relative to the fixed side plate, at least one floating roller is arranged on the mounting plate in a rotating mode, and the cut pole piece sequentially bypasses the first transmission roller, the burr detection assembly, the tension roller, the floating roller and the second transmission roller and is connected with the winding mechanism.
On the basis of the technical scheme, preferably, the first driving roller and the second driving roller are both provided with rotary encoders for acquiring position information of the pole pieces, and the rotary encoders are installed at one ends of the first driving roller and the second driving roller, which are far away from the fixed side plate, and are used for confirming the belt length of the pole pieces.
Further, preferably, a positioning sensor is arranged above the first driving roller and the second driving roller, and the positioning sensor is used for detecting the identification holes in the pole pieces.
On the basis of the above technical scheme, preferably, the burr detecting assembly includes a fixed shaft, detecting rollers and two image capturing units, the fixed shaft is fixedly disposed on the fixed side plate and parallel to the roller passing assembly, the detecting rollers are rotatably disposed on the fixed shaft for allowing a pole piece to pass through the outer peripheral surface of the fixed shaft, and the two image capturing units are symmetrically disposed, respectively and fixedly disposed on the fixed shafts on both sides of the detecting rollers, and are used for image acquisition of edges of both sides of the pole piece passing through the detecting rollers.
Further, preferably, the peripheral walls at two ends of the detection roller in the length direction are respectively provided with thinning areas which are not in contact with the edge surfaces of the pole pieces.
On the basis of the above technical solution, preferably, the burr detection assembly corresponds to the middle positions of the tension roller and the floating roller in the horizontal direction.
On the basis of the technical scheme, preferably, the burr detection device further comprises a marking assembly fixedly mounted on the fixed side plate, the marking assembly is located below one side, away from the tension roller, of the second driving roller, the marking assembly comprises a marking machine, a first follower roller and a second follower roller, the first follower roller and the second follower roller are arranged on the fixed side plate at intervals and are rotatably connected with the fixed side plate, the marking machine is located above the second follower roller and is fixedly connected with the fixed side plate, pole pieces conveyed by the second driving roller sequentially bypass the first follower roller and the second follower roller and are connected with a winding mechanism, and the marking machine is used for marking bad pole pieces passing through the second follower roller.
Further, preferably, a first sensing element and a second sensing element are respectively and fixedly arranged on the marking machine, the first sensing element is used for detecting the label paper on the marking machine, and the second sensing element is used for detecting whether the labeling of the bad pole piece is successful or not.
On the other hand, the invention also discloses a method for detecting the slitting burrs of the lithium battery pole piece, which comprises the following operation steps:
s1, winding the cut pole piece around a first driving roller, a burr detection assembly, a tension roller, a floating roller, a second driving roller, a first follower roller and a second follower roller in sequence and connecting the pole piece with a winding mechanism;
s2, when the rotary encoder records a certain length of the pole piece tape, triggering the burr detection assembly to detect the edge of the pole piece, simultaneously reducing the tape running speed of the pole piece after slitting, and buffering the pole piece tape running through the pole piece buffering assembly under the condition that the winding speed is not changed;
s3, identifying the cut pole piece region through a positioning inductor, and associating the pole piece burr bad region with a corresponding pole piece section;
and S4, when the burr detection of the corresponding pole piece region exceeds the standard, and the pole piece region passes through the second follower roll, labeling defective pole pieces by a labeling machine.
Compared with the prior art, the invention has the following beneficial effects:
(1) The invention discloses a lithium battery pole piece slitting burr detection device.A pole piece buffer assembly is movably arranged on a fixed side plate below a tension roller, and a burr detection assembly is arranged between a first driving roller and the tension roller, when a slit pole piece is wound, the slit pole piece sequentially bypasses the first driving roller, the burr detection assembly, the tension roller, a floating roller and a second driving roller and is connected with a winding mechanism;
(2) Through the mutual matching of the rotary encoder and the positioning sensor, the pole piece sections after being cut can be identified, the pole piece burr detection area is bound with the corresponding pole piece section, the pole piece burr defective product section can be conveniently and quickly obtained, and the marking assembly is utilized to mark the pole piece defective product so as to isolate the corresponding defective pole section;
(3) Through set up respectively on detecting roller length direction both ends periphery wall with pole piece marginal surface non-contact's attenuate district, the unit formation of image of making a video recording of being convenient for is surveyd, avoids detecting the roller long time contact pole piece edge and produces dirty interference camera unit formation of image.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic view of a three-dimensional structure of a lithium battery pole piece slitting burr detection device disclosed by the invention;
FIG. 2 is an enlarged view of a portion A of FIG. 1;
FIG. 3 is a schematic plane structure diagram of a lithium battery pole piece slitting burr detection device disclosed by the invention;
the attached drawings are as follows:
1. fixing the side plate; 2. a roller passing assembly; 21. a first drive roller; 22. a second driving roller; 23. a tension roller; 3. a burr detection component; 4. a pole piece buffer assembly; 41. mounting a plate; 42. a floating roll; 5. a rotary encoder; 6. positioning the inductor; 31. a fixed shaft; 32. a detection roller; 33. an image pickup unit; 321. a thinning region; 7. marking the assembly; 71. marking machine; 72. a first follower roller; 73. a second follower roller; 711. a first inductive element; 712. a second inductive element.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
As shown in fig. 1, with reference to fig. 2-3, an embodiment of the present invention discloses a lithium battery pole piece slitting burr detecting device, and in an actual use process, the lithium battery pole piece slitting burr detecting device of the present embodiment is fixed between a slitting mechanism and a winding mechanism. The pole piece receiving and cutting mechanism cuts the pole piece, and then the pole piece is rolled by the rolling mechanism after burr detection.
The burr detection device of this embodiment includes fixed curb plate 1 and crosses roller assembly 2, and fixed curb plate 1 is vertical fixed to be set up between cutting mechanism and winding mechanism, crosses roller assembly 2 and rotates and set up on fixed curb plate 1 for the pole piece after cutting crosses the roller, specifically speaking, cuts back pole piece and walks the area transmission on crossing roller assembly 2, then is given the rolling operation by winding mechanism. This implementation is involved cuts mechanism and winding mechanism and is prior art conventional equipment.
The roller assembly 2 of the present embodiment includes a first driving roller 21, a second driving roller 22 and at least one tension roller 23, wherein the at least one tension roller 23 is located between the first driving roller 21 and the second driving roller 22.
The first driving roller 21 is configured to receive and transmit the slit pole pieces, the at least one tension roller 23 is configured to receive the pole pieces transmitted by the first driving roller 21 and provide tension for the pole pieces, in order to flatten and tension the pole pieces during tape transport, the tension rollers 23 of this embodiment are provided in multiple numbers, the multiple tension rollers 23 are horizontally arranged at intervals, and the second driving roller 22 is configured to transmit the pole pieces to the winding mechanism. It should be noted that the first driving roller 21, the second driving roller 22 and the at least one tension roller 23 are parallel to each other and are all driven to rotate.
In order to realize the detection of the burrs of the cut pole piece, generally, in the process of winding and tape-feeding the cut pole piece, an industrial camera is additionally arranged to obtain a burr image and judge the burr image through an algorithm, but in the pole piece production process, a winding mechanism and a cutting mechanism belong to the telling operation, the frame rate and the sampling precision of a common industrial camera are limited, and the production requirement cannot be met. Therefore, the hardware and software matching investment of the industrial camera is overlarge, and the cost of the detection device is overhigh in the production process of the pole piece, so that the detection device is not high in applicability and economical efficiency.
Therefore, the burr detection device of the embodiment is further provided with the burr detection component 3 and the pole piece buffering component 4 to solve the problems existing in the prior art.
Specifically, the burr detecting component 3 is located between the first driving roller 21 and the tension roller 23 group, and is used for respectively detecting burrs on two side edges of the pole piece passing through the first driving roller 21.
In the present embodiment, as some preferred embodiments, the burr detecting assembly 3 includes a fixing shaft 31, a detecting roller 32 and an image capturing unit 33, the fixing shaft 31 is fixedly disposed on the fixing side plate 1 and parallel to the roller assembly 2, the detecting roller 32 is rotatably disposed on the fixing shaft 31 for the pole piece to pass through the outer peripheral surface thereof, and the image capturing unit 33 is symmetrically disposed in two groups, and respectively fixedly disposed on the fixing shaft 31 at two sides of the detecting roller 32 for capturing images of two side edges of the pole piece passing through the detecting roller 32. In the actual use process, the slitting mechanism conveys the slit pole pieces to the winding mechanism through the first transmission roller, the detection roller 32 and the tension roller 23, and finally the second transmission roller. When the pole piece passes through the detection roller 32 in the tape moving process, the image shooting unit 33 at the two ends of the detection roller 32 can shoot images, and whether the burrs on the edge of the pole piece reach the standard or not is judged through a software algorithm according to the shot images. The imaging unit 33 of the present embodiment is an industrial camera, and may be an area-array camera or another camera.
Because of the high-speed operation of the slitting mechanism and the winding mechanism, the pole piece is carried on the detection roller 32 at a high speed, the frame rate and the sampling precision of the industrial camera are limited, and normal image capture cannot be met, and in order not to influence the high-speed winding operation of the winding mechanism, the pole piece buffer assembly 4 is arranged on the fixed side plate 1 below the tension roller 23 in a floating manner.
The pole piece buffer assembly 4 comprises a mounting plate 41 and at least one floating roller 42, the mounting plate 41 is arranged on the fixed side plate 1 below the tension roller 23 in a sliding mode and can move up and down relative to the fixed side plate 1, the at least one floating roller 42 is arranged on the mounting plate 41 in a rotating mode, and the pole piece after slitting sequentially bypasses the first transmission roller 21, the detection roller 32, the tension roller 23, the floating roller 42 and the second transmission roller 22 and is connected with the winding mechanism. As some preferred embodiments, the number of the floating rollers 42 in this embodiment is matched with the number of the tension rollers 23, and the pole pieces pass through the top surface of the first driving roller 21, pass down the bottom surface of the detection roller 32, then pass through the top surface of the tension roller 23, pass down the bottom surface of the floating roller 42, sequentially pass through multiple sets of the tension rollers 23 and the floating rollers 42 corresponding up and down, and finally pass through the top surface of the second driving roller 22, and are connected with the winding mechanism. Through setting up multiunit corresponding tension roller 23 and floating roll 42 from top to bottom, on the one hand, can realize the tensioning that floats when the pole piece crosses the roller, on the other hand, can conveniently control pole piece tape speed.
By adopting the technical scheme, when the pole piece is taken for a certain length, the control system triggers the burr detection component 3 to detect the edge of the pole piece, the speed of the cut pole piece is reduced, the winding speed of the winding mechanism to the pole piece is kept unchanged, the winding mechanism pulls the pole piece when the winding speed is higher than the speed of the cut pole piece, the pole piece pulls the floating roller 42 and approaches the tension roller 23 under the action of the tension roller 23, the pole piece is in a floating tension state when the pole piece is taken on the detection roller 32, the speed of the pole piece is reduced when the pole piece is taken on the detection roller 32, the online burr detection of the pole piece can be met by configuring the low-performance industrial camera, hardware and software with overhigh input cost on the industrial camera are not needed, and the production cost is reduced. After burr detection is accomplished to camera unit 33, cut the mechanism and increase speed, the pole piece walking speed on detecting roller 32 this moment is accelerated, floating roll 42 pushes down the pole piece under the action of gravity, makes pole piece buffering subassembly 4 fall initial position, satisfies the normal tape transport of pole piece after cutting and rolling, reduces the influence to cutting and rolling efficiency, can utilize low performance industry camera to accomplish pole piece edge burr detection simultaneously, has higher suitability and economic nature.
In order to obtain the length of the pole piece belt, in this embodiment, the first driving roller 21 and the second driving roller 22 are both provided with the rotary encoder 5 for obtaining the position information of the pole piece, and the rotary encoder 5 is installed at one end of the first driving roller 21 and the second driving roller 22 away from the fixed side plate 1 for confirming the belt length of the pole piece. After the rotary encoder 5 on the first driving roller 21 obtains a certain length of the pole piece tape, the rotary encoder 5 may feed back a signal to a control system, such as a PLC, and the control system triggers the slitting mechanism to decelerate, and at the same time, the control system triggers the image pickup unit 33 to work. The rotary encoder 5 on the second driving roller 22 is used for obtaining the pole piece tape running length between the first driving roller 21 and the second driving roller 22, and the pole piece length between the two driving rollers is in a real-time change state, so that the pole piece tape running length can be accurately positioned through the rotary encoder 5 on the first driving roller 21 and the second driving roller 22. Simultaneously, rotary encoder 5 on first driving roller 21 when the certain length of pole piece ambulation, can trigger the camera unit and shoot the collection, the pole piece is when every certain length promptly, and the camera unit gathers a pole piece image and judges whether the burr is bad through system algorithm, should gather interval length and be less than the ambulation length of pole piece between first driving roller 21 and the second driving roller 22, consequently, through two rotary encoder, can know the pole piece interval at the bad place of pole piece burr.
In order to know that the pole piece burr is bad in which pole piece section of bar pole piece accurately, this embodiment all is provided with location inductor 6 through above first driving roller 21 and second driving roller 22, and location inductor 6 is used for detecting the discernment hole on the pole piece. When the strip pole piece after cutting passes through first driving roller 21, the first discernment hole on the strip pole piece is discerned to location inductor 6 above first driving roller 21, rotary encoder on first driving roller 21 triggers the camera unit when taking certain length to shoot simultaneously, when the pole piece passes through second driving roller 22, location inductor 6 on second driving roller 22 detects when first discernment hole, and when location inductor 6 above first driving roller 21 detects the second discernment hole adjacent with first discernment hole, two location inductor 6 are correlated with each other, then can distinguish corresponding pole piece section, this pole piece is a complete band winding pole piece. If the burr is bad in the pole piece section, the bad pole piece section can be marked through the marking mechanism in the subsequent rolling process.
On the basis of the above technical solution, the peripheral walls at both ends of the detection roller 32 in the length direction are respectively provided with thinning regions 321 which are not in contact with the edge surfaces of the pole pieces. Specifically, the diameter of the thinning area 321 is smaller than that of the detection roller 32, and the width of the thinning area 321 is 1mm-5mm, so that the imaging observation of the imaging unit 33 is facilitated, and the imaging unit 33 is prevented from being interfered by the dirt generated when the detection roller 32 contacts the edge of the pole piece for a long time.
As some preferred embodiments, the burr detecting unit 3 corresponds to the intermediate position of the tension roller 23 and the dancer roller 42 in the horizontal direction. Therefore, the pole piece can conveniently bypass the bottom surface of the detection roller 32 and then upwards bypass the top surface of the tension roller 23, and the whole pole piece is always in a tension state in the tape moving process.
After pole piece burr detection is completed, when the pole piece burr does not reach the standard, the identification needs to be isolated for the bad pole piece, and the battery is not good because the bad pole piece is manufactured into the battery during subsequent winding.
For this reason, this embodiment has still fixed the marking subassembly 7 that has set up on fixed curb plate 1, marking subassembly 7 is located one side below that tension roller 23 was kept away from to second driving roller 22, marking subassembly 7 includes marking machine 71, first follower roller 72 and second follower roller 73 interval set up on fixed curb plate 1, and rotate with fixed curb plate 1 and be connected, marking machine 71 is located second follower roller 73 top, and with fixed curb plate 1 fixed connection, the pole piece that carries through second driving roller 22 is walked around first follower roller 72 and second follower roller 73 in proper order and is connected with winding mechanism, marking machine 71 is used for marking the bad pole piece that passes through second follower roller 73. In this embodiment, the first follower roller 72 and the second follower roller 73 are disposed at an interval, so that on one hand, the pole piece can be tensioned, and on the other hand, the pole piece can be in a flat state, thereby facilitating the pasting of the marking paper.
When the image pickup unit 33 acquires the edge image of the pole piece, whether the burr marks the pole piece is judged through a system algorithm, the burr is generally judged to be unqualified if the length of the burr is more than half of the thickness of the pole piece, and when the system judges that the burr on the pole piece does not reach the standard, the pole piece passes through the second follower roller 73, the marking machine 71 sticks a defective label paper to the surface of the pole piece, and the marking machine 71 is connected with the control system and receives a control signal of the control system.
Particularly, pole piece after equipment during operation is cut is walked on first driving roller, rotary encoder rotates and begins to record material and takes the tape length and trigger the unit of making a video recording and shoot and detect the pole piece and cut the limit burr, when the unit of making a video recording detects that the burr exceeds standard, the pole piece continues to walk the area forward, location inductor 6 on first driving roller 21 and the location inductor on the second driving roller 22 mutually support, when determining corresponding pole piece, if the regional burr of the pole piece that detects in this pole piece exceeds standard, then the system triggers bad pole piece section and walks to suitable position, carry out the defective products by the marking machine and paste the mark.
Specifically, there is certain distance of taking between second driving roller 22 and the second follower roller 73, consequently, distinguish corresponding pole piece section when two location inductors 6, and there is the burr when bad in this pole piece section, the mark machine will receive system feedback signal and carry out and beat the mark, can be when the pole piece takes away certain length through rotary encoder on the second driving roller 22 this moment, give the marking machine with signal feedback, this bad pole piece is walked on second follower roller 73 after, the operation of labeller execution mark paper, avoid the marking machine to paste the mark in advance, paste in the preceding pole piece, cause the error and paste the mark.
It is noted that in this embodiment, the rotary encoder and the position sensor on the second driving roller can also play two roles: 1. the mark position is beaten to accurate location marking machine, avoids the pole piece buffering subassembly to lead to the location inaccurate. 2. The phenomenon that the material pole piece in the buffer area is broken and the length is recorded and the material pole piece is invalid in the actual operation process is prevented, the position of a bad product pole piece can be repositioned by the rotary encoder and the positioning sensor on the second driving roller after the material pole piece is connected again, and the labeling position is accurate.
In some preferred embodiments, the marking machine 71 is fixedly provided with a first sensing element 711 and a second sensing element 712, the first sensing element 711 is used for detecting a marking paper on the marking machine 71, when the marking machine 71 lacks paper, a signal is sent to the control system to prompt that the marking paper is added, and the second sensing element 712 is used for detecting whether the labeling of the defective pole piece is successful or not.
The invention also discloses a detection method for the slitting burrs of the lithium battery pole piece, which comprises the following operation steps of:
s1, winding the cut pole piece around a first driving roller 21, a burr detection assembly 3, a tension roller 23, a floating roller 42, a second driving roller 22, a first follower roller 72 and a second follower roller 73 in sequence and connecting the pole piece with a winding mechanism;
s2, when the rotary encoder 5 records a certain length of the pole piece tape, the burr detection assembly 3 is triggered to detect the edge of the pole piece, the tape running speed of the cut pole piece is reduced, and the pole piece tape is buffered through the pole piece buffer assembly 4 under the condition that the winding speed is not changed;
s3, marking the cut pole piece area through the positioning inductor 6, and associating the pole piece burr bad area with the corresponding pole piece section;
and S4, when the burr detection of the corresponding pole piece exceeds the standard, and the pole piece area passes through the second follower roller 73, labeling the defective pole piece product through a labeling machine 71.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (9)
1. A lithium battery pole piece slitting burr detection device comprises a fixed side plate (1) and a roller passing assembly (2), wherein the roller passing assembly (2) is rotatably arranged on the fixed side plate (1);
the method is characterized in that: the roller passing assembly (2) comprises a first driving roller (21), a second driving roller (22) and at least one tension roller (23), and the at least one tension roller (23) is positioned between the first driving roller (21) and the second driving roller (22);
the burr detection device also comprises a burr detection assembly (3) and a pole piece buffer assembly (4); wherein the burr detection assembly (3) is positioned between the first drive roller (21) and the tension roller (23);
pole piece buffer unit (4) include mounting panel (41) and at least one floating roll (42), mounting panel (41) slide to set up tension roller (23) below on fixed curb plate (1), can for fixed curb plate (1) reciprocates, at least one floating roll (42) rotate to set up on mounting panel (41), the pole piece after cutting walks around in proper order first driving roller (21), burr detection component (3), tension roller (23), floating roll (42) and second driving roller (22) are connected with winding mechanism.
2. The lithium battery pole piece slitting burr detecting device of claim 1, characterized in that: first driving roller (21) reach all be provided with rotary encoder (5) that are used for acquireing pole piece position information on second driving roller (22), rotary encoder (5) are installed first driving roller (21) reach second driving roller (22) are kept away from the one end of fixed curb plate (1) for confirm the length of taking of pole piece.
3. The lithium battery pole piece slitting burr detecting device of claim 2, characterized in that: first driving roller (21) and second driving roller (22) top all is provided with location inductor (6), location inductor (6) are used for detecting the discernment hole on the pole piece.
4. The lithium battery pole piece slitting burr detecting device of claim 1, characterized in that: the burr detection assembly (3) comprises a fixed shaft (31), a detection roller (32) and a camera unit (33), wherein the fixed shaft (31) is fixedly arranged on the fixed side plate (1) and is parallel to the roller passing assembly (2), the detection roller (32) is rotatably arranged on the fixed shaft (31) and is used for allowing a pole piece to pass through the outer peripheral surface of the fixed shaft, and the camera unit (33) is symmetrically provided with two groups which are respectively fixedly arranged on the fixed shaft (31) at two sides of the detection roller (32) and used for carrying out image acquisition on the edges of two sides of the pole piece passing through the detection roller (32).
5. The lithium battery pole piece slitting burr detection device of claim 4, characterized in that: and thinning areas (321) which are not in contact with the edge surfaces of the pole pieces are respectively arranged on the peripheral walls of the two ends of the detection roller (32) in the length direction.
6. The lithium battery pole piece slitting burr detecting device of claim 4, characterized in that: the burr detection assembly (3) corresponds to the middle positions of the tension roller (23) and the floating roller (42) in the horizontal direction.
7. The lithium battery pole piece slitting burr detecting device of claim 3, characterized in that: the burr detection device also comprises a marking assembly (7) fixedly mounted on the fixed side plate (1), wherein the marking assembly (7) is located below one side, away from the tension roller (23), of the second driving roller (22), the marking assembly (7) comprises a marking machine (71), a first follower roller (72) and a second follower roller (73), the first follower roller (72) and the second follower roller (73) are arranged on the fixed side plate (1) at intervals and are connected with the fixed side plate (1) in a rotating mode, the marking machine (71) is located above the second follower roller (73) and is fixedly connected with the fixed side plate (1), pole pieces conveyed by the second driving roller (22) sequentially bypass the first follower roller (72) and the second follower roller (73) and are connected with a winding mechanism, and the marking machine (71) is used for marking poor pole pieces passing through the second follower roller (73).
8. The lithium battery pole piece slitting burr detecting device of claim 7, characterized in that: the marking machine (71) is respectively and fixedly provided with a first induction element (711) and a second induction element (712), the first induction element (711) is used for detecting label paper on the marking machine (71), and the second induction element (712) is used for detecting whether the labeling of a poor pole piece is successful or not.
9. A lithium battery pole piece slitting burr detection method utilizes the lithium battery pole piece slitting burr detection device of claim 7, and is characterized by comprising the following operation steps:
s1, winding the cut pole piece around a first driving roller (21), a burr detection assembly (3), a tension roller (23), a floating roller (42), a second driving roller (22), a first follower roller (72) and a second follower roller (73) in sequence and connecting the pole piece with a winding mechanism;
s2, when the rotary encoder (5) records a certain length of the pole piece tape, triggering the burr detection assembly (3) to detect the edge of the pole piece, simultaneously reducing the tape running speed of the pole piece after cutting, and buffering the pole piece tape running through the pole piece buffering assembly (4) under the condition that the winding speed is not changed;
s3, marking the pole piece area after slitting through a positioning inductor (6), and associating the pole piece burr bad area with a corresponding pole piece section;
and S4, when the burr detection of the corresponding pole piece region exceeds the standard, and the pole piece region passes through a second follower roller (73), labeling the defective pole piece product through a labeling machine (71).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211256019.3A CN115479896A (en) | 2022-10-13 | 2022-10-13 | Detection device and detection method for slitting burrs of lithium battery pole piece |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211256019.3A CN115479896A (en) | 2022-10-13 | 2022-10-13 | Detection device and detection method for slitting burrs of lithium battery pole piece |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117849058A (en) * | 2024-03-06 | 2024-04-09 | 宁德时代新能源科技股份有限公司 | Detection system and detection method for pole piece |
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2022
- 2022-10-13 CN CN202211256019.3A patent/CN115479896A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117849058A (en) * | 2024-03-06 | 2024-04-09 | 宁德时代新能源科技股份有限公司 | Detection system and detection method for pole piece |
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