CN113649299B - Pole edge straightness detection equipment and battery cell winding production line - Google Patents
Pole edge straightness detection equipment and battery cell winding production line Download PDFInfo
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- CN113649299B CN113649299B CN202110986465.9A CN202110986465A CN113649299B CN 113649299 B CN113649299 B CN 113649299B CN 202110986465 A CN202110986465 A CN 202110986465A CN 113649299 B CN113649299 B CN 113649299B
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- 238000001514 detection method Methods 0.000 title claims abstract description 149
- 238000004804 winding Methods 0.000 title claims abstract description 52
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 20
- 238000003708 edge detection Methods 0.000 claims abstract description 46
- 238000005520 cutting process Methods 0.000 claims description 5
- 230000005611 electricity Effects 0.000 claims 2
- 238000000034 method Methods 0.000 description 7
- 230000002950 deficient Effects 0.000 description 5
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 4
- 229910052744 lithium Inorganic materials 0.000 description 4
- 238000004080 punching Methods 0.000 description 4
- 238000007689 inspection Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 230000032258 transport Effects 0.000 description 2
- 239000013078 crystal Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000013072 incoming material Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000007665 sagging Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
Classifications
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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
- B07C5/02—Measures preceding sorting, e.g. arranging articles in a stream orientating
-
- 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
- B07C5/04—Sorting according to size
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/058—Construction or manufacture
- H01M10/0587—Construction or manufacture of accumulators having only wound construction elements, i.e. wound positive electrodes, wound negative electrodes and wound separators
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M6/00—Primary cells; Manufacture thereof
- H01M6/005—Devices for making primary cells
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M6/00—Primary cells; Manufacture thereof
- H01M6/14—Cells with non-aqueous electrolyte
-
- 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
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Secondary Cells (AREA)
- Controlling Rewinding, Feeding, Winding, Or Abnormalities Of Webs (AREA)
Abstract
The invention discloses pole piece edge flatness detection equipment, which comprises a pole piece conveying device and a pole piece edge detection mechanism, wherein the pole piece conveying device penetrates through the pole piece edge detection mechanism, the pole piece edge detection device comprises a plurality of groups of detection mark processing devices, the detection mark processing devices are arranged right above or right below the pole piece conveying device, the detection mark processing devices are arranged side by side along the conveying direction of the pole piece conveying device, the pole piece conveying device conveys pole pieces into the pole piece edge detection mechanism in a sectional mode, the detection mark processing devices are aligned to the side edges of the pole pieces conveyed by the pole piece conveying device, and the detection mark processing devices detect the flatness of the side edges of the pole pieces and mark the pole piece sections with uneven detection. The pole piece edge flatness detection equipment can automatically perform full detection on the pole piece. In addition, the invention also discloses a battery cell winding production line.
Description
Technical Field
The invention relates to the field of lithium battery manufacturing, in particular to pole piece edge flatness detection equipment and a battery cell winding production line.
Background
In the production process of the lithium battery, the positive plate, the negative plate and the diaphragm are required to be wound to form a tightly connected battery cell, and then the battery cell is filled into a battery shell for liquid injection and sealing to obtain the finished battery.
Before winding production, the large pole piece is cut into small pole pieces with certain width because the large pole piece is released by the pole piece winding. The edges of the cut small pole pieces are not flat due to equipment defects or incoming material defects. Once the flatness of the edges of the small pole pieces exceeds the specified range, the battery core manufactured by using the small pole pieces has performance or safety risks, such as too small spacing between the positive pole and the negative pole in an uneven area, and when slight lithium precipitation occurs, the precipitated lithium crystal branches can cause short circuit after penetrating through the diaphragm.
Therefore, in order to avoid the occurrence of the above-mentioned situation, the edge flatness of the small pole pieces is generally checked by a human hand before the cell winding operation is performed. However, since the pole piece is generally long, it is difficult to perform full inspection on the pole piece, and the accuracy of manual inspection is not high, and it is difficult to accurately grasp whether the edge of the pole piece meets the flatness requirement.
Therefore, there is a need for a pole piece edge flatness detection device and a cell winding production line capable of automatically performing full inspection on a pole piece to overcome the above-mentioned drawbacks.
Disclosure of Invention
The invention aims to provide pole piece edge flatness detection equipment capable of automatically and fully detecting pole pieces.
Another object of the present invention is to provide a cell winding line capable of identifying a defective cell.
In order to achieve the above purpose, the pole piece edge flatness detection device comprises a pole piece conveying device and a pole piece edge detection mechanism, wherein the pole piece conveying device penetrates through the pole piece edge detection mechanism, the pole piece edge detection device comprises a plurality of groups of detection mark processing devices, the detection mark processing devices are arranged side by side along the conveying direction of the pole piece conveying device, the pole piece conveying device conveys pole pieces into the pole piece edge detection mechanism in a segmented mode, the detection mark processing devices are aligned to the side edges of the pole pieces conveyed by the pole piece conveying device, and the detection mark processing devices detect the flatness of the side edges of the pole pieces and mark the pole piece sections with uneven detection.
Preferably, the detection mark processing device punches the side edge of the pole piece to mark.
Preferably, the detection mark processing device comprises a ranging transmitter, a ranging receiver, a puncher and a controller, wherein the ranging transmitter, the ranging receiver and the puncher are respectively electrically connected with the controller, the ranging transmitter and the ranging receiver are arranged in tandem, the puncher is arranged between the ranging transmitter and the ranging receiver, and the ranging transmitter, the ranging receiver and the puncher are respectively aligned to the side edges of the pole pieces.
Preferably, the detection mark processing device is provided with at least a first position far away from the pole piece conveying device and a second position close to the pole piece conveying device relative to the pole piece conveying device, and when the pole piece conveying device conveys the pole piece into the pole piece edge detection mechanism, the detection mark processing device is switched from the first position to the second position.
Preferably, the pole piece edge detection mechanism further comprises an upper driver, a lower driver, a positioning frame and a mounting frame, wherein the mounting frame is mounted on the positioning frame in a vertically sliding manner, the detection mark processing device is mounted on the mounting frame, the mounting frame is mounted at the output end of the upper driver and the lower driver, and the upper driver and the lower driver drive the mounting frame to slide up and down so as to drive the detection mark processing device to do reciprocating movement between a first position and a second position.
Preferably, the pole piece edge detection mechanism further comprises a structural shell and a distance detector, the locating frame is installed in the structural shell, the upper driver and the lower driver are installed on the structural shell, and the distance detector is installed on the installation frame and is aligned with the middle of the pole piece.
Preferably, the pole piece conveying device is a belt winding conveying device, the pole piece conveying device is in tension adjustable arrangement, the pole piece conveying device is in left-right movement adjustable arrangement, a bearing table arranged below the pole piece conveying device is arranged in the locating frame, tension is reduced when the pole piece conveying device conveys the pole piece to the pole piece edge detection mechanism, so that the pole piece falls on the bearing table, width detectors are respectively arranged on the left side and the right side of the bearing table, the width of the bearing table is smaller than that of the pole piece, the two width detectors are used for detecting the width of the part of the pole piece exposed on the bearing table, and the pole piece conveying device carries out left-right movement adjustment when the width detectors detect that the widths of the parts exposed on the two sides of the pole piece are inconsistent so as to drive the widths of the parts exposed on the two sides of the pole piece to be equal.
In order to achieve the other purpose, the battery cell winding production line comprises the pole piece edge flatness detection equipment and a winding mechanism. The winding mechanism comprises a first mark detection device, a second mark detection device and a winding device, wherein the winding device is arranged between the first mark detection device and the second mark detection device, cutting knives are arranged on the rear sides of the first mark detection device and the second mark detection device, the first mark detection device is used for detecting whether a positive plate section is marked, the second mark detection device is used for detecting whether a negative plate section is marked, and the winding device winds the positive plate and the negative plate which flow out into an electric core.
Preferably, the first mark detection device and the second mark detection device respectively comprise a plurality of mark detection transmitters and mark detection receivers, the mark detection receivers are arranged right below the mark detection transmitters, the mark detection receivers and the mark detection transmitters enclose a mark detection runner for the pole piece to circulate, and the mark detection receivers receive signals sent by the mark detection transmitters when the pole piece sections of the pole piece are marked.
Preferably, the battery cell winding production line further comprises a loading platform and a removing device, wherein the loading platform is arranged on the rear side of the winding mechanism, a plurality of battery cell loading tables for placing battery cells are arranged on the loading platform, and the removing device removes the battery cells containing the markers from the battery cell loading tables.
Compared with the prior art, the pole piece edge flatness detection equipment comprises a pole piece conveying device and a pole piece edge detection mechanism. The pole piece conveying device passes through the pole piece edge detection mechanism, the pole piece edge detection mechanism comprises a plurality of groups of detection mark processing devices, the detection mark processing devices are arranged right above the pole piece conveying device, and the plurality of groups of detection mark processing devices are arranged side by side along the conveying direction of the pole piece conveying device. The pole piece conveying device conveys pole pieces into the pole piece edge detection mechanism in a sectional mode, and the detection mark processing device is aligned to the side edge of the pole piece conveyed by the pole piece conveying device. The detection mark processing device detects the flatness of the edge of the pole piece and marks the pole piece section with the detected unevenness. Therefore, when the pole piece conveying device is used for conveying the pole pieces to the pole piece edge detection mechanism section by section, the pole piece edge detection mechanism can automatically detect the flatness of the side edge of each pole segment, and the production automation degree is high. The pole pieces are conveyed to the pole piece edge detection mechanism section by section, and the whole roll of pole pieces can be detected. And because the detection mark processing devices are arranged side by side, a plurality of detection mark processing devices can detect the flatness of each part of the side edges of the pole segments, so that the full detection is realized, and the comprehensiveness and the effectiveness of the detection are ensured. When the detection mark processing device detects that the side edge of the pole piece section is uneven, the part can be marked, the uneven side edge of the pole piece section can be conveniently distinguished, and the follow-up processing is convenient.
It can be understood that, because the battery cell winding production line comprises the pole piece edge flatness detection equipment and the winding mechanism, when at least one of the positive pole piece and the negative pole piece is marked, the pole piece section can be detected by the first mark detection device or the second mark detection device, so that the pole piece section is recorded as an unqualified product, and the battery cell formed by winding by the winding device is the unqualified product, so that the unqualified product can be identified and removed, and the output of the unqualified product is avoided.
Drawings
Fig. 1 is a schematic plan view of a cell winding line according to the present invention.
Fig. 2 is a schematic perspective view of the pole piece edge flatness detecting device of the present invention.
Fig. 3 is a schematic plan view of the pole piece edge detection mechanism when the detection mark processing device is in the first position.
Fig. 4 is a schematic plan view of the pole piece edge detector when the detection mark processing device is in the second position.
Fig. 5 is a schematic perspective view of the pole piece edge detection mechanism shown in fig. 3 after hiding the structural housing, the upper and lower drivers and the mounting frame.
Fig. 6 is a schematic perspective view of the support table, width detector, and example detector of fig. 5 further hidden.
Fig. 7 is a schematic diagram of a pole piece edge detection mechanism in detecting the flatness of the side edges of the pole piece.
Fig. 8 is a schematic perspective view of the upper and lower drivers mated with the mounting frame.
Fig. 9 is a schematic plan view of the first mark detecting device or the second mark detecting device when detecting a pole piece with a mark (through hole).
Fig. 10 is a schematic plan view of the first mark detecting device or the second mark detecting device when detecting a qualified pole piece.
Fig. 11 is a schematic plan view of a pole piece to be inspected.
Detailed Description
In order to describe the technical content and constructional features of the present invention in detail, the following description will be made with reference to the embodiments in conjunction with the accompanying drawings.
As shown in fig. 1 to 5 and 7, the cell winding production line 100 of the present invention includes a pole piece edge flatness detection device 10 and a winding mechanism 20. Wherein the pole piece edge flatness detection device 10 comprises a pole piece conveying device 11 and a pole piece edge detection mechanism 12. The pole piece conveying device 11 passes through the pole piece edge detection mechanism 12, the pole piece edge detection mechanism 12 comprises a plurality of groups of detection mark processing devices 121, the detection mark processing devices 121 are arranged right above the pole piece conveying device, and the groups of detection mark processing devices 121 are arranged side by side along the conveying direction of the pole piece conveying device 11. The pole piece conveying device 11 conveys the pole piece 200 into the pole piece edge detecting mechanism 12 in a sectional mode, and the detection mark processing device 121 is aligned with the side edge of the pole piece 200 conveyed by the pole piece conveying device 11. The detection mark processing device 121 detects the flatness of the edge of the pole piece 200 and marks the pole piece section where unevenness is detected. Thus, when the pole piece 200 is conveyed to the pole piece edge detection mechanism 12 segment by using the pole piece conveying device 11, the pole piece edge detection mechanism 12 can automatically detect the flatness of the side edge of each pole segment, and the production automation degree is high. The pole piece 200 is conveyed to the pole piece edge detection mechanism 12 section by section, so that the whole roll of pole piece can be detected. Moreover, as the detection mark processing devices 121 are arranged side by side, the plurality of detection mark processing devices 121 can detect the flatness of each part of the side edges of the pole segments, so that the full detection is realized, and the comprehensiveness and the effectiveness of the detection are ensured. When the detection mark processing device 121 detects that the side edge of the pole piece section is uneven, the part is marked, so that the uneven side edge of the pole piece section can be conveniently distinguished, and the subsequent processing is convenient.
Of course, the detection mark processing device 121 may be disposed directly below the pole piece conveying device according to actual needs. In this embodiment, the pole piece edge detection mechanism 12 includes two rows of detection mark processing devices 121 to detect and mark the flatness of the edges of the two sides of the pole piece at the same time, so as to improve the detection efficiency. The above-mentioned unevenness means that there are protrusions or depressions which are not satisfactory for production at the side edges of the pole segments. The marking process performed by the detection marking processing device 121 includes, but is not limited to, punching, code spraying, pattern spraying, cutting, and the like as follows. In the present embodiment, the detection mark processing device 121 performs punching on the side edge of the pole piece 200 to mark, but is not limited thereto.
As shown in fig. 7, the detection mark processing device 121 includes a ranging transmitter 1211, a ranging receiver 1212, a puncher 1213, and a controller 1214. The ranging transmitter 1211, the ranging receiver 1212 and the punch 1213 are electrically connected to the controller 1214, the ranging transmitter 1211 and the ranging receiver 1212 are arranged in tandem, the punch 1213 is disposed between the ranging transmitter 1211 and the ranging receiver 1212, and the ranging transmitter 1211, the ranging receiver 1212 and the punch 1213 are aligned at the side edges of the pole piece 200. During detection, the ranging transmitter 1211 sends a signal to the side edge of the pole piece 200, the signal is sent to the ranging receiver 1212 through the emission of the side edge, the whole process is carried out for a time t, if the flatness of the side edge meets the requirement, the test time is a qualified constant value (or is allowed to fluctuate within a certain tolerance range), the distance between the detection point of the side edge corresponding to the pole piece 200 and the detection mark processing device 121 is a qualified distance, and the puncher 1213 does not work. If the test results in a time exceeding or falling below a certain range, it is indicated that the distance between the side edge of the pole piece 200 and the detection mark processing device 121 is a non-conforming distance, and the situation that the side edge is uneven and concave-convex is shown, and the degree of concave-convex exceeds the process range, and the puncher 1213 performs punching processing on the side edge. Preferably, the ranging transmitter 1211 is a laser transmitter, the ranging receiver 1212 is a laser receiver, and the hole puncher 1213 is a laser hole puncher, but is not limited thereto.
As shown in fig. 3,4 and 7, the detection mark processing device 121 has at least a first position away from the pole piece conveying device 11 and a second position close to the pole piece conveying device 11 with respect to the pole piece conveying device 11. When the pole piece transporting device 11 transports the pole piece 200 into the pole piece edge detecting mechanism 12, the detection mark processing device 121 is switched from the first position to the second position. When the detection mark processing device 121 moves to the second position, the detection mark processing device 121 is sufficiently close to the side edge of the pole piece 200 to be detected, so that the detection accuracy is ensured. After detection, the detection mark processing device 121 moves to the first position again, so that the next section of pole piece 200 is convenient to convey.
As shown in fig. 3 to 8, the pole piece edge detection mechanism 12 further includes an up-down driver 122, a positioning frame 123, and a mounting frame 124. The mounting frame 124 is slidably mounted on the positioning frame 123 up and down, the detection mark processing device 121 is mounted on the mounting frame 124, the mounting frame 124 is mounted at the output end of the upper and lower driver 122, and the upper and lower driver 122 drives the mounting frame 124 to slide up and down so as to drive the detection mark processing device 121 to move back and forth between the first position and the second position. The up-down driver 122 is used for conveniently and accurately controlling the detection mark processing device 121 to move to different positions, and the movement of the mounting frame 124 is guided by the positioning frame 123, so that the movement is stable. Preferably, the positioning frame 123 is provided with a chute structure 1231 extending in the up-down direction, and the mounting frame 124 is slidably mounted in the chute structure 1231. For example, the up-down driver 122 is a combination of a motor and a rack-and-pinion structure, but is not limited thereto.
As shown in fig. 3-5, pole piece edge detection mechanism 12 further includes a structural housing 125 and a distance detector 126. The positioning frame 123 is mounted in the structural housing 125, the up-down driver 122 is mounted on the structural housing 125, and the distance detector 126 is mounted on the mounting frame 124 and aligned with the middle of the pole piece 200. The structural housing 125 provides sufficient protection for the pole piece edge detection mechanism 12, and the distance between the pole piece edge detection mechanism and the pole piece 200 is detected by the distance detector 126, so that the upper and lower drivers 122 can drive the mounting frame 124 to a certain position conveniently, and the detection mark processing device 121 can accurately reach the second position. For example, the distance detector 126 is a laser range finder, but is not limited thereto. The laser rangefinder adopts the existing structure, so this will not be described here again.
As shown in fig. 1 to 5, the pole piece transporting device 11 is a tape winding transporting device (i.e., the pole piece transporting device 11 transports the pole piece 200 by winding). The pole piece conveying device 11 is arranged with adjustable tension. The pole piece conveying device 11 is arranged in a manner of moving left and right in an adjustable manner, a bearing table 1232 positioned below the pole piece conveying device 11 is arranged in the positioning frame 123, and tension is reduced when the pole piece conveying device 11 conveys the pole piece 200 into the pole piece edge detection mechanism 12, so that the pole piece 200 falls on the bearing table 1232. Pole piece 200, which is positioned on support table 1232, is in an un-tensioned state to accurately detect whether there is an uneven side edge of pole piece 200. The left and right sides of the support table 1232 are each provided with a width detector 127, and the width of the support table 1232 is smaller than the width of the pole piece 200. The two width detectors 127 are used to detect the width of the portion of the pole piece 200 exposed to the support table 1232. When the two width detectors 127 detect that the widths of the exposed portions at the two sides of the pole piece 200 are inconsistent, the pole piece conveying device 11 performs left-right movement adjustment so as to drive the widths of the exposed portions at the two sides of the pole piece 200 to be equal. The exposed portions on both sides of the pole piece 200 have the same width, so that whether the side edges are uneven can be accurately and comprehensively detected.
The pole piece conveying device 11 is also provided with a guide roller 111, and the guide roller 111 supports the pole piece 200 to prevent the pole piece 200 from sagging. The pole piece edge detection mechanism 12 can be used to detect the side edges of either the positive or negative pole pieces. In this embodiment, the pole piece edge detection mechanism 12 is used to detect the flatness of each pole piece segment, and then the pole piece 200 is released to roll the core. Of course, according to actual needs, the pole piece 200 passing through the pole piece edge detection mechanism 12 can directly enter the next winding core without winding.
As shown in fig. 1, the winding mechanism 20 includes a first mark detecting device 21, a second mark detecting device 22, and a winding device 23. The winding device 23 is provided between the first mark detecting device 21 and the second mark detecting device 22, and a cutter 24 is mounted on the rear sides of the first mark detecting device 21 and the second mark detecting device 22. The first mark detecting device 21 is used for detecting whether a positive electrode piece 201 has a pole piece section marked, the second mark detecting device 22 is used for detecting whether a negative electrode piece 202 has a pole piece section marked, and the winding device 23 winds the positive electrode piece 201 and the negative electrode piece 202 into a battery cell 300. After the positive electrode sheet 201 and the negative electrode sheet 202 are wound into the battery cell 300, the positive electrode sheet 201 and the negative electrode sheet 202 are cut by the cutting blades 24, respectively, and the wound battery cell 300 is sent out. When the first mark detection device 21 detects that the positive electrode piece 201 has a pole segment marked or the second mark detection device 22 detects that the negative electrode piece 202 has a pole segment marked, the current winding core is obtained, and the obtained battery core 300 is unqualified, and then the battery core 300 is removed, so that unqualified battery cores 300 are not output, and the quality of products can be ensured.
As shown in fig. 9 and 10, each of the first mark detecting device 21 and the second mark detecting device 22 includes a plurality of mark detecting emitters 25 and a mark detecting receiver 26, the mark detecting receiver 26 is disposed directly below the mark detecting emitters 25, the mark detecting receiver 26 and the mark detecting emitters 25 enclose a mark detecting flow path (not labeled) through which the pole piece (positive pole piece or negative pole piece) flows, and the mark detecting receiver 26 receives a signal from the mark detecting emitter 25 when the pole piece 200 has a pole piece segment marked. For example, the mark detection emitter 25 is a laser emitter and the mark detection receiver 26 is a laser receiver, but is not limited thereto. In this embodiment, if at least one of the positive and negative electrode sheets is marked (has a through hole), the signal sent by the mark detection transmitter 25 passes through the through hole on the side edge of the electrode sheet 200, and the signal is received by the mark detection receiver 26, which indicates that there is an uneven side edge of the electrode sheet section. It should be noted that, the winding core further includes a diaphragm (not shown), and the diaphragm is omitted in the drawing, and the diaphragm is an essential material for winding the core and the process is well known to those skilled in the art, so that the description thereof is omitted here.
As shown in fig. 1, the cell winding production line 100 of the present invention further includes a loading platform 30 and a removing device 40 mounted at the rear side of the winding mechanism 20. The loading platform 30 is provided with a plurality of battery cell loading tables 31 for placing battery cells 300, and the removal device 40 moves the battery cells 300 containing the markers out of the battery cell loading tables 31. The battery core 300 coiled by the coiling mechanism 20 is put on the battery core loading table 31 for temporary storage, and a plurality of battery core loading tables 31 are arranged to temporarily store the battery core 300 at the same time, so that the waiting of shutdown is avoided. If the first mark detecting device 21 and/or the second mark detecting device 22 detect that the pole piece 200 has a through hole, the pole piece section is recorded, the battery cell 300 formed by the winding core is a defective product, and the defective product can be removed by using the removing device 40.
The working principle of the battery cell winding production line 100 of the present invention is described below, namely, the flatness detection device 10 is used to detect the flatness of the side edges of the positive electrode sheet/negative electrode sheet, and the detection actions of the positive electrode sheet and the negative electrode sheet are the same, so that the following description will be given collectively for the electrode sheet.
The pole piece conveying device 11 sends the pole piece 200 into the pole piece edge detection mechanism 12 segment by segment, when the pole piece 200 is conveyed to the position right below the detection mark processing device 121, conveying is stopped, tension of the pole piece conveying device 11 is controlled to be reduced, the pole piece 200 is horizontally placed on the supporting table 1232, meanwhile, the two width detectors 127 detect whether widths of exposed parts on two sides of the pole piece 200 are equal, and if the widths are detected to be unequal, the pole piece conveying device 11 performs fine adjustment in the left-right direction until the widths of the exposed parts on two sides of the pole piece 200 are equal. The distance detector 126 is then operated to detect the distance from the pole piece 200, and based on this distance, the up-and-down driver 122 drives the mounting frame 124 downward to move the detection mark processing device 121 to the second position. The ranging transmitter 1211 sends a signal to the side edge of the pole piece 200, the signal is sent to the ranging receiver 1212 through the emission of the side edge, the whole process is carried out for a time t, if the flatness of the side edge meets the requirement, the tested time is a qualified constant value (or is allowed to fluctuate within a certain tolerance range), the distance between the detection point of the side edge corresponding to the pole piece 200 and the detection mark processing device 121 is a qualified distance, and the puncher 1213 does not work. If the test results in a time exceeding or falling below a certain range, it is indicated that the distance from the side edge of the sheet 200 to the detection mark processing device 121 is a non-conforming distance, which is manifested in that the side edge is uneven and has a concave-convex shape, and the degree of concave-convex exceeds the process range, and the puncher 1213 performs punching processing on the side edge. After completion, the up-down driver 122 drives the mounting frame 124 to move upwards, so that the detection mark processing device 121 moves the first position again, the pole piece conveying device 11 sends out the pole piece, the next pole piece enters, the above operation is repeated until the detection is completed, and the detected pole piece is wound up
Then, the core winding operation is performed, after the positive electrode sheet 201 and the negative electrode sheet 202 are discharged, the positive electrode sheet 201 enters the first mark detection device 21 to detect whether a through hole exists, the negative electrode sheet 202 enters the second mark detection device 22 to detect whether a through hole exists, in this process, the mark detection emitter 25 emits a laser signal, and if the emitted signal can be received by the mark detection receiver 26, the situation that the side edge of the section of the electrode sheet is uneven is indicated, and the situation is recorded. The winding device 23 winds the positive electrode sheet 201, the negative electrode sheet 202 and the separator into the battery cell 300, the cutting knife 24 cuts off the positive electrode sheet 201 and the negative electrode sheet 202, the wound battery cell 300 is placed on the battery cell loading table 31, and if the recorded condition of the positive electrode sheet 201 and/or the negative electrode sheet 202 is uneven, the wound battery cell 300 is a defective product, and the defective product is removed from the battery cell loading table 31 by using the removing device 40.
The foregoing disclosure is only illustrative of the preferred embodiments of the present invention and is not to be construed as limiting the scope of the invention, which is defined by the appended claims.
Claims (7)
1. The pole piece edge flatness detection device is characterized by comprising a pole piece conveying device and a pole piece edge detection mechanism, wherein the pole piece conveying device penetrates through the pole piece edge detection mechanism, the pole piece edge detection device comprises a plurality of groups of detection mark processing devices, the detection mark processing devices are arranged right above or right below the pole piece conveying device, the detection mark processing devices are arranged side by side along the conveying direction of the pole piece conveying device, the pole piece conveying device conveys pole pieces into the pole piece edge detection mechanism in a sectional manner, the detection mark processing devices aim at the side edges of the pole pieces conveyed by the pole piece conveying device, and the detection mark processing devices detect the flatness of the side edges of the pole pieces and mark the pole piece sections with uneven detection; the pole piece edge detection mechanism also comprises an upper driver, a lower driver, a positioning frame and a mounting frame, wherein the mounting frame is arranged on the positioning frame in a manner of sliding up and down, the detection mark processing device is arranged on the mounting frame, the mounting frame is arranged at the output end of the upper driver and the lower driver, the upper driver and the lower driver drive the mounting frame to slide up and down so as to drive the detection mark processing device to do movement back and forth between a first position and a second position, the pole piece edge detection mechanism also comprises a structural shell and a distance detector, the positioning frame is arranged in the structural shell, the upper driver and the lower driver are arranged on the structural shell, the distance detector is arranged at the middle part of the mounting frame and aligned with a pole piece, the pole piece conveying device is a belt winding conveying device, the pole piece conveying device is in tension adjustable arrangement, the pole piece conveying device is in a left-right movement adjustable arrangement, be equipped with the bearing platform that is located pole piece conveyor below in the locating rack, pole piece conveyor carries the pole piece to in the pole piece edge detection mechanism tension reduces to make the pole piece fall on the bearing platform, the left and right sides of bearing platform respectively is equipped with width detector, the width of bearing platform is less than the width of pole piece, two width detector is used for detecting the pole piece expose in the width of the part of bearing platform, pole piece conveyor is two when width detector detects the width of the part of pole piece both sides exposure inconsistent carries out control movement adjustment, in order to drive the width of the part of pole piece both sides exposure equal.
2. The pole piece edge flatness detection apparatus according to claim 1, wherein the detection mark processing means punches a side edge of the pole piece to mark.
3. The pole piece edge flatness detection apparatus of claim 1, wherein the detection mark processing device comprises a ranging transmitter, a ranging receiver, a punch and a controller, wherein the ranging transmitter, the ranging receiver and the punch are each electrically connected with the controller, the ranging transmitter and the ranging receiver are arranged in tandem, the punch is arranged between the ranging transmitter and the ranging receiver, and the ranging transmitter, the ranging receiver and the punch are each aligned at the side edge of the pole piece.
4. The pole piece edge flatness detection apparatus of claim 1, wherein the detection mark processing device has at least a first position far from the pole piece conveying device and a second position near to the pole piece conveying device relative to the pole piece conveying device, and the detection mark processing device is switched from the first position to the second position when the pole piece conveying device conveys the pole piece into the pole piece edge detection mechanism.
5. The utility model provides an electricity core coiling production line, includes pole piece edge flatness check out test set and winding mechanism, pole piece coiling flatness check out test set dock in winding mechanism, its characterized in that, pole piece flatness check out test set is as in any one of claims 1-4, winding mechanism includes first mark detection device, second mark detection device and winding device, winding device locates between first mark detection device and the second mark detection device, the cutting knife is all installed to the rear side of first mark detection device and the second mark detection device, first mark detection device is used for detecting whether the positive plate has the pole piece section to be marked, second mark detection device is used for detecting whether the negative plate has the pole piece section to be marked, winding device rolls into the electricity core with positive plate and the negative plate that flows.
6. The battery cell winding production line according to claim 5, wherein the first mark detection device and the second mark detection device each comprise a plurality of mark detection emitters and mark detection receivers, the mark detection receivers are arranged right below the mark detection emitters, the mark detection receivers and the mark detection emitters enclose mark detection flow channels for pole pieces to circulate, and the mark detection receivers receive signals sent by the mark detection emitters when pole piece sections of the pole pieces are marked.
7. The cell winding production line of claim 5, further comprising a loading platform mounted on the rear side of the winding mechanism, the loading platform being provided with a plurality of cell loading stations on which the cells are placed, and a removal device that removes the cells containing the markers from the cell loading stations.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110986465.9A CN113649299B (en) | 2021-08-26 | 2021-08-26 | Pole edge straightness detection equipment and battery cell winding production line |
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| CN202110986465.9A CN113649299B (en) | 2021-08-26 | 2021-08-26 | Pole edge straightness detection equipment and battery cell winding production line |
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| CN113649299B true CN113649299B (en) | 2025-03-18 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103915654A (en) * | 2014-04-02 | 2014-07-09 | 东莞市博拓自动化设备有限公司 | Battery winder |
| CN208256837U (en) * | 2018-06-27 | 2018-12-18 | 新乡市弘力电源科技有限公司 | Lithium battery production positive and negative anodes up- coiler |
| CN211696261U (en) * | 2020-03-23 | 2020-10-16 | 珠海冠宇电池股份有限公司 | Sheet deformation detection device |
| CN216574227U (en) * | 2021-08-26 | 2022-05-24 | 东莞市创明电池技术有限公司 | Pole piece edge flatness detection equipment and battery cell winding production line |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109580652A (en) * | 2018-10-30 | 2019-04-05 | 广州超音速自动化科技股份有限公司 | A kind of quality of battery pole piece detection method, electronic equipment and storage medium |
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- 2021-08-26 CN CN202110986465.9A patent/CN113649299B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103915654A (en) * | 2014-04-02 | 2014-07-09 | 东莞市博拓自动化设备有限公司 | Battery winder |
| CN208256837U (en) * | 2018-06-27 | 2018-12-18 | 新乡市弘力电源科技有限公司 | Lithium battery production positive and negative anodes up- coiler |
| CN211696261U (en) * | 2020-03-23 | 2020-10-16 | 珠海冠宇电池股份有限公司 | Sheet deformation detection device |
| CN216574227U (en) * | 2021-08-26 | 2022-05-24 | 东莞市创明电池技术有限公司 | Pole piece edge flatness detection equipment and battery cell winding production line |
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