CN212645776U

CN212645776U - Pole piece detection device

Info

Publication number: CN212645776U
Application number: CN202021449162.0U
Authority: CN
Inventors: 不公告发明人
Original assignee: Wuxi Lead Intelligent Equipment Co Ltd
Current assignee: Wuxi Lead Intelligent Equipment Co Ltd
Priority date: 2020-07-21
Filing date: 2020-07-21
Publication date: 2021-03-02
Anticipated expiration: 2030-07-21

Abstract

The application relates to a pole piece detection device, which comprises a first conveying device, a second conveying device and a control device, wherein the first conveying device is used for conveying pole pieces along a first direction; the pole piece detection device further comprises: the first auxiliary mechanism is arranged on the first conveying device and used for flattening the pole pieces so as to carry out size detection on the pole pieces, the first detection device is used for detecting the size of the pole pieces flattened by the first auxiliary mechanism, the size at least comprises one of the length, the width and the area of the pole pieces, the second auxiliary mechanism is arranged on the first conveying device and is arranged at an interval with the first auxiliary mechanism, the second auxiliary mechanism is used for flattening the pole pieces so as to carry out defect detection on the first surfaces of the pole pieces, and the second detection device is used for detecting the defects of the pole pieces flattened by the second auxiliary mechanism; the problems of false detection and missed detection in pole piece detection in the prior art are solved, and the quality and the efficiency of pole piece detection are improved.

Description

Pole piece detection device

Technical Field

The application relates to the technical field of secondary battery manufacturing, in particular to a pole piece detection device.

Background

At present, the lithium battery technology gradually matures and becomes a main power source of the power battery of the electric automobile. The battery core is used as a core component of the lithium battery, and the quality of the battery core directly influences the electrochemical performance of the lithium battery. For the laminated cell, the positive and negative pole pieces after die cutting and the diaphragm are formed into the laminated cell together through a lamination process. The positive and negative plates may be damaged in the die cutting process or errors exist in the sizes of the positive and negative plates generated by the die cutting. Therefore, the size detection and flaw detection are required to be performed on the pole pieces produced by die cutting, and the pole pieces which do not meet the requirements are removed.

However, the existing pole piece may be distorted and wrinkled during production and processing, and the bending and wrinkling of the pole piece can greatly affect the detection precision of size detection and flaw detection during detection of detection equipment, resulting in missed detection and false detection, thereby affecting the quality of the battery core.

Disclosure of Invention

Therefore, it is necessary to provide a pole piece detection device for solving the problems of missing detection and false detection of the existing pole piece.

A pole piece detection device comprises a first conveying device, wherein the first conveying device is used for conveying a pole piece along a first direction, and the pole piece detection device further comprises: the device comprises a first auxiliary mechanism, a first detection device, a second auxiliary mechanism and a second detection device;

the first auxiliary mechanism is arranged on the first conveying device and used for flattening the pole pieces so as to carry out size detection on the pole pieces;

the first detection device is used for detecting the size of the pole piece flattened by the first auxiliary mechanism, and the size at least comprises one of the length, the width and the area of the pole piece;

the second auxiliary mechanism is arranged on the first conveying device and is arranged at an interval with the first auxiliary mechanism; the second auxiliary mechanism is used for flattening the pole piece so as to detect the defect of the first surface of the pole piece conveniently;

the second detection device is used for detecting the defects of the pole pieces flattened by the second auxiliary mechanism;

in the process that the first conveying device conveys the pole pieces along the first direction, the pole pieces respectively pass through the first auxiliary mechanism and the second auxiliary mechanism; when the pole piece passes through the first auxiliary mechanism, the pole piece is flattened by the first auxiliary mechanism, and the first detection device detects the size of the pole piece; when the pole piece passes through the second auxiliary mechanism, the pole piece is flattened by the second auxiliary mechanism, and the second detection device detects the defect of the first surface of the pole piece.

In one embodiment, the first assist mechanism includes: a first flattening assembly and a second flattening assembly;

the first flattening assembly and the second flattening assembly are oppositely arranged on the first conveying device along a second direction;

the first flattening assembly is used for flattening one side of the pole piece, and the second flattening assembly is used for flattening the other side of the pole piece in the second direction so as to flatten the pole piece on the first conveying device;

the second direction is perpendicular to the first direction.

In one embodiment, the first flattening assembly and/or the second flattening assembly includes at least two sets of pinch roller assemblies, the at least two sets of pinch roller assemblies being spaced apart along the first direction;

the pinch roller assembly includes: the device comprises a first mounting seat, a connecting assembly and a pressing wheel;

first mount pad with first conveyor fixed connection, the pinch roller passes through coupling assembling with first mount pad is connected, the pinch roller is rotatable set up in coupling assembling is last, the pinch roller is used for supporting the pressure the pole piece, in order to incite somebody to action the pole piece flattens on the first conveyor.

In one embodiment, the connection assembly includes: the device comprises a support column, an adjusting block and a pinch roller mounting block;

one end of the supporting column is fixedly connected with the first mounting seat;

the adjusting block is movably arranged on the supporting column;

the pinch roller installation block is movably arranged on the adjusting block, and the pinch roller is rotatably arranged on the pinch roller installation block.

In one embodiment, the first flattening assembly and/or the second flattening assembly further comprise a guide plate;

the guide plate is arranged above the first conveying device, the guide plate and the first conveying device are arranged at intervals, and a transmission channel for the pole piece to pass through is formed between the guide plate and the first conveying device;

the guide plate comprises a guide part, the pole piece passes through the first auxiliary mechanism under the conveying of the first conveying device, enters the transmission channel under the guide effect of the guide part, and is pressed flat on the first conveying device by the pressing wheel.

In one embodiment, the guide plate is provided with a pressing hole, and the pressing wheel penetrates through the pressing hole to press the pole piece to be flat on the first conveying device.

In one embodiment, the second assist mechanism includes: the second mounting seat, the first press roller and the second press roller are arranged on the first mounting seat;

the first press roller and the second press roller are arranged on the first conveying device at intervals along the first direction through the second mounting seat;

the first pressing roller and the second pressing roller are rotatably arranged on the second mounting seat;

the first compression roller and the second compression roller are used for abutting against the two sides of the pole piece along the first direction respectively, and the pole piece is pressed flatly on the first conveying device, so that the second detection device can detect defects of the first surface of the pole piece.

In one embodiment, the pole piece detection apparatus further comprises: the second conveying device, the third auxiliary mechanism and the third detection device;

the second conveying device is arranged at the downstream of the first conveying device and is used for grabbing the first surface of the pole piece on the first conveying device, so that the pole piece is transferred to the second conveying device from the first conveying device and is conveyed to the third auxiliary mechanism;

the third auxiliary mechanism is arranged on the second conveying device and used for flattening the pole piece so as to detect the defect of the second surface of the pole piece;

the third detection device is used for detecting the defects of the pole pieces flattened by the third auxiliary mechanism;

when the pole piece is conveyed to the third auxiliary mechanism by the second conveying device, the pole piece is flattened by the third auxiliary mechanism, and the third detection device detects the defect of the second surface of the pole piece.

In one embodiment, the pole piece detection device further comprises a material rejecting device and a waste collecting device;

the material rejecting device is arranged on the second conveying device and used for transferring the pole pieces detected to be defective by the second detection device and the third detection device into the waste collecting device.

In one embodiment, the third assist mechanism includes: the third mounting seat, the third press roll and the fourth press roll are arranged on the frame;

the third press roller and the fourth press roller are arranged on the second conveying device at intervals along the conveying direction of the second conveying device through the third mounting seat;

the third press roller and the fourth press roller are rotatably arranged on the third mounting seat;

the third compression roller and the fourth compression roller are respectively used for abutting against the two sides of the pole piece along the conveying direction of the second conveying device, and the pole piece is pressed flatly on the second conveying device, so that the third detection device can detect defects of the second surface of the pole piece.

Through setting up foretell pole piece detection device, the pole piece after the cross cutting is earlier through first complementary unit and the processing of flattening of second complementary unit, carries out size detection and defect detection to the pole piece after flattening again, has avoided the condition emergence of false retrieval and missed detection, when having improved the pole piece and having detected the precision, has also improved electric core production quality.

Drawings

FIG. 1 is a schematic illustration of a pole piece in one embodiment;

FIG. 2 is a schematic structural diagram of an exemplary embodiment of an electrode plate detecting device;

FIG. 3 is a schematic view of the pole piece detecting device shown in FIG. 2;

FIG. 4 is a schematic structural view of a first assist mechanism in one embodiment;

FIG. 5 is a schematic view of a state of the first assist mechanism shown in FIG. 4;

FIG. 6 is a schematic structural view of another state of the first assist mechanism shown in FIG. 4;

FIG. 7 is a schematic structural view of a second assist mechanism in one embodiment;

FIG. 8 is a schematic structural diagram of an electrode plate detection device according to another embodiment.

Detailed Description

To facilitate an understanding of the present application, the present application will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present application are illustrated in the accompanying drawings. This application may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "or/and" includes any and all combinations of one or more of the associated listed items.

In order to facilitate understanding of the technical scheme of the present application, a usage scenario of the pole piece detection apparatus provided by the present application is introduced here. In the production and processing process of the battery core, the pole pieces are firstly required to be cut into a sheet material form from a pole piece coil material form. After the pole piece is cut, the edge of a part of the pole piece may be curled, tilted or wrinkled. With reference to the pole piece 10 shown in fig. 1 in combination, the edge 11 of the pole piece 10 is turned up for manufacturing reasons. If defect detection and size detection are directly performed on the pole piece 10 at this time, because the existing detection mode is usually a mode of photographing through a camera, the tilting part of the pole piece 10 affects the imaging of photographing through the camera, so that errors exist in the final size detection and defect detection results, the pole piece detection results are affected, and finally, the quality of the battery cell is low.

Example one

Referring to fig. 2, an embodiment of a pole piece detecting apparatus includes a first conveying device 100, and the first conveying device 100 is used for conveying a pole piece 10 along a first direction. In the embodiment of the present application, the first conveying device 100 may be a vacuum belt conveying line or the like, which is capable of conveying the pole pieces 10 between the stations, and this application does not limit this. The first conveyor 100 includes a suction table 110, a vacuum belt 120, a driving wheel 140, and a driving mechanism (not shown). In one embodiment, the first conveying device 100 includes two driving wheels 140, and the two driving wheels 140 are rotatably disposed at two ends of the suction platform 110, respectively. The vacuum belt 120 is wound around two driving wheels 140 and the adsorption stage 110. The driving wheel 140 is driven by the driving mechanism to rotate, so as to drive the vacuum belt 120 to move, so as to convey the pole piece 10 placed on the vacuum belt 120 along the first direction. Specifically, in fig. 2, the first direction is a left-to-right direction, the driving wheel 140 is driven by the driving mechanism to rotate clockwise, so as to drive the vacuum belt 120 to rotate clockwise, so that the pole piece 10 on the vacuum belt 120 moves along with the vacuum belt 120 from left to right, that is, the first conveying device 100 conveys the pole piece 10 along the first direction. Alternatively, the driving mechanism may be a motor, and the driving wheel 140 is driven by the motor to rotate. It should be noted that, when the first conveyor 100 is a vacuum belt line, the first direction is an extending direction of the vacuum belt line, that is, a longitudinal direction.

Referring to fig. 3, the adsorption platform 110 is provided with at least one adsorption hole 111 and at least one vacuum interface 130. The vacuum belt 120 is also provided with at least one suction hole (not shown). The evacuation interface 130 may be in communication with an evacuation device (not shown). When the vacuum extractor is connected with negative pressure through the vacuum interface 130, the suction holes 111 on the suction platform 110 suck the vacuum belt 120, and since the suction holes are also formed on the vacuum belt 120, the pole piece 10 on the vacuum belt 120 is sucked on the vacuum belt 120 and moves synchronously with the vacuum belt 120. During the process of conveying the pole piece 10 along the first direction by the first conveying device 100, the pole piece 10 is tightly adsorbed on the vacuum belt 120,

with continued reference to fig. 2 and 3, the pole piece detection apparatus further includes a first auxiliary mechanism 200, a first detection apparatus 300, a second auxiliary mechanism 400, and a second detection apparatus 500. First auxiliary mechanism 200 is arranged on first conveyor 100 for flattening pole piece 10 to facilitate size detection of pole piece 10. The first detecting device 300 is used for detecting the size of the pole piece flattened by the first auxiliary mechanism 200, wherein the size at least comprises one of the length, the width and the area of the pole piece. Optionally, the size of the pole piece may further include one of a length, a width and an area of the tab on the pole piece. The second auxiliary mechanism 400 is disposed on the first conveying device 100 and spaced from the first auxiliary mechanism 200, and the second auxiliary mechanism 400 is used for flattening the pole piece 10 so as to perform defect detection on the first surface of the pole piece 10. The second detection device 500 is used for detecting the defects of the pole piece 10 flattened by the second auxiliary mechanism 400. Defects of the pole piece 10 include: scratches, cracks, defects, stains, and the like, which are not limited in this application.

In the embodiment of the present application, although the pole piece 10 is adsorbed on the first conveying device 100, the surface unevenness and the edge curling and tilting of the pole piece 10 still affect the size detection and the defect detection of the pole piece 10. The first auxiliary mechanism 200 and the second auxiliary mechanism 400 can flatten the pole piece 10 with uneven surface or curled and tilted edge, so that the pole piece 10 is flatly laid on the first conveying device 100, and the defect detection and the size detection of the pole piece 10 are facilitated.

During the process of conveying the pole piece 10 in the first direction by the first conveying device 100, the pole piece passes through the first auxiliary mechanism 200 and the second auxiliary mechanism 400, respectively. When the pole piece 10 passes through the first auxiliary mechanism 200, the pole piece 10 is flattened by the first auxiliary mechanism 200, so that the pole piece 10 is flatly laid on the first conveying device 100, and the size detection of the pole piece 10 is facilitated. When the pole piece 10 passes through the second auxiliary mechanism 400, the pole piece 10 is flattened by the second auxiliary mechanism 400, so that the pole piece 10 is flatly laid on the first conveying device 100, and the second detecting device 500 is convenient for detecting the defect of the first surface of the pole piece 10. Specifically, the pole piece 10 may be pressed flat on the surface of the vacuum belt 120 by the first auxiliary mechanism 200 or the second auxiliary mechanism 400, so as to perform size detection and defect detection on the pole piece 10.

In one embodiment, the first detection device 300 includes an area-array camera, and after the first auxiliary mechanism 200 presses the pole piece 10 flatly against the first conveying device 100, the area-array camera photographs the pole piece 10 and analyzes the photographed image to obtain the size of the pole piece 10. In a typical case, the pole piece 10 is substantially rectangular, and the first detecting device 300 includes two area-array cameras, and both the area-array cameras are disposed above the first auxiliary mechanism 200. One of the area-array cameras is used for shooting images of two vertex angles of the pole piece 10, the other camera is used for shooting images of the other two vertex angles of the pole piece 10, and the images shot by the two area-array cameras are processed to obtain the size of the pole piece 10. The second detecting device 500 includes a detecting mechanism 510 and a mounting frame 520. The inspection mechanism 510 includes a line camera, and the inspection mechanism 510 is disposed on the first conveyor 100 via a mounting frame 520. After the second auxiliary mechanism 400 presses the pole piece 100 flatly against the first conveying device 100, the detecting mechanism 510 detects a defect on the first surface of the pole piece 10.

It should be noted that the pole piece 10 has a first surface and a second surface, and when the first conveying device 100 conveys the pole piece 10 in the first direction, the first conveying device 100 contacts with the second surface of the pole piece 10 (i.e. the lower surface of the pole piece 10 in fig. 2), while the first surface of the pole piece 10 (i.e. the upper surface of the pole piece 10 in fig. 2) is not blocked. Therefore, when the pole piece 10 is conveyed to the second auxiliary mechanism 400, the second detection device 500 can detect the defect of the first surface of the pole piece 10.

In the present embodiment, first assist mechanism 200 includes a first flattening assembly 210 and a second flattening assembly 220. Referring to fig. 3, the first flattening assembly 210 and the second flattening assembly 220 are disposed on the first conveying device 100 in a second direction opposite to each other. First flattening assembly 210 is configured to flatten one side of pole piece 10, and second flattening assembly 220 is configured to flatten the other side of pole piece 10 in the second direction, so as to flatten pole piece 10 on first conveyor 100. Wherein the second direction is perpendicular to the first direction. Taking fig. 3 as an example, the first direction is a left-to-right direction, and the second direction is an up-and-down direction. The first flattening assembly 210 and the second flattening assembly 220 are oppositely disposed on two sides of the first conveying device 100 along the second direction. The first flattening assembly 210 flattens the upper side of the pole piece 10 in fig. 3, and the second flattening assembly 220 flattens the lower side of the pole piece 10 in fig. 3, so as to flatly press the pole piece 10 against the first conveying device 100, so that the first detecting device 300 can perform size detection on the pole piece 10. It should be noted that, when the first conveyor 100 is a vacuum belt conveyor line, the first direction is an extending direction of the vacuum belt conveyor line, that is, a length direction of the vacuum belt conveyor line; the second direction is the width direction of vacuum belt transfer chain.

Specifically, the first flattening assembly 210 and the second flattening assembly 220 are identical in structure, and only slightly different in arrangement position. First flattening assembly 210 and/or second flattening assembly 220 include at least two sets of pinch roller assemblies 230, each set of pinch roller assemblies 230 is arranged along first direction interval, and pinch roller assemblies 230 are used for pressing pole piece 10. Referring collectively to FIGS. 4 and 5, puck assembly 230 includes a first mount 231, a connection assembly (not shown), and a puck 235. First mount pad 231 and first conveyor 100 fixed connection, the pinch roller 235 is connected with first mount pad 231 through coupling assembling, and the rotatable setting of pinch roller 235 in coupling assembling, and pinch roller 235 is used for pressing pole piece 10 to flatten pole piece 10 on first conveyor 100. In the embodiment of the present application, the pole piece 10 comes to the first auxiliary mechanism 200 under the conveying of the first conveying device 100, at this time, the first conveying device 100 continues to convey the pole piece 10 in the first direction until the pole piece 10 is completely pressed against the first conveying device 100 by the first auxiliary mechanism 200. In the process, the pole piece 10 is pressed against the first conveying device 100 by the pressing wheel 235, and the pressing wheel 235 rotates under the action of friction force along with the movement of the vacuum belt 120, so that the pole piece 10 can be pressed against the first conveying device 100, the relative sliding between the pressing wheel 235 and the surface of the pole piece 10 can be avoided, and the surface of the pole piece 10 is prevented from being scratched.

In one embodiment, referring to figure 5 in combination, first flattening assembly 210 and second flattening assembly 220 each include two sets of puck assemblies 230, and the two sets of puck assemblies 230 are spaced apart in a first direction. Each group of pressing wheel assemblies 230 is used for pressing one vertex angle of the pole piece 10 against the first conveying device 100, and when 4 vertex angles of the pole piece 10 are pressed against the first conveying device 100 by the pressing wheel assemblies 230, the pole piece 10 is pressed against the first conveying device 100 flatly. For example, in fig. 5, two top corners of the upper side of the pole piece 10 are respectively pressed against the first conveying device 100 by two sets of pressing wheel assemblies 230 of the first flattening assembly 210, and two top corners of the lower side of the pole piece 10 are respectively pressed against the first conveying device 100 by two sets of pressing wheel assemblies 230 of the second flattening assembly 220, at this time, the size of the pole piece 10 can be detected.

In actual production processes, pole pieces 10 of different sizes are produced. To accommodate the testing of pole pieces 10 of different sizes, in one embodiment, referring to FIG. 5, the connection assembly includes support posts 232, adjustment blocks 233, and puck mounting blocks 234. One end of the supporting block 232 is fixedly connected with the first mounting seat 231, the adjusting block 233 is movably disposed on the supporting column 232, the pinch roller mounting block 234 is movably disposed on the adjusting block 233, and the pinch roller 235 is rotatably disposed on the pinch roller mounting block 234. Optionally, the supporting column 232 is disposed perpendicular to the first mounting seat 231, and the supporting column 232 is parallel to the first conveying device 100. When the length of the pole piece 10 in the second direction changes, the position of the adjusting block 233 on the supporting column 232 can be adjusted, so that the pressing wheel 235 can press against the pole piece 10; when the length of pole piece 10 in the first direction changes, the position of puck mounting block 234 on adjustment block 233 can be adjusted so that puck 235 can press against pole piece 10. Optionally, adjustment block 233 is provided with mounting holes 2331, and the position of puck 235 in the first direction can be adjusted by adjusting the position at which puck mounting block 234 is mounted in mounting holes 2331.

Referring to fig. 5 and 6 in particular, in fig. 5, the length of the pole piece 10 in the second direction is shorter, and the adjusting block 233 may be disposed at a position of the supporting column 232 far from one end of the first mounting seat 231, so that the pressing wheel 235 can press against the pole piece 10. In fig. 6, the length of the pole piece 10 in the second direction is longer than that in fig. 5, and the length in the first direction is shorter, the adjusting block 233 may be disposed close to the first mounting seat 231, and the pinch roller mounting block 234 may be disposed far from the supporting column 232, so that the pinch roller 235 can press against the pole piece 10. In fig. 5 and 6, the first direction is a left-to-right direction, and the second direction is an up-and-down direction.

It should be noted that, in the embodiment of the present application, the pressing wheel 235 of the first auxiliary mechanism 200 presses against four corners of the pole piece 10 to achieve the best flattening effect, so that the pole piece 10 is flatter.

In addition, in the actual production process, the curvature of the edge 11 of the pole piece 10 that can be bent is relatively high, and the diameter of the pressing wheel 235 may be relatively small, and if the pole piece 10 passes through the first auxiliary mechanism 200 in this case, the edge 11 of the pole piece 10 may be directly bent by the pressing wheel 235 to generate a crease, which does not flatten the pole piece 10, but increases the bending degree of the edge of the pole piece 10.

To avoid this, in one embodiment, referring to fig. 4, first flattening assembly 210 and/or second flattening assembly 220 further include a guide plate 236. The guide plate 236 is disposed above the first conveying device 100, the guide plate 236 is spaced apart from the first conveying device 100, and a transmission channel 2362 for the pole piece 10 to pass through is formed between the guide plate 236 and the first conveying device 100. Guide plate 236 includes a guide surface 2361, and when pole piece 10 passes through first auxiliary mechanism 100 under the transportation of first conveyor 100, pole piece 10 is smoothed in advance under the guide action of the guide surface, so as to reduce the degree of bending of edge 11 of pole piece 10. And, pole piece 10 enters transport path 2362 under the guide of guide surface 2361, so as to be flattened on first conveyor 100 by pinch roller 235, thereby avoid edge 11 of pole piece 10 being bent by pinch roller 235. Optionally, the guide surface 2361 may be a substantially arc surface as long as the pole piece 10 can be smoothed in advance and the pole piece 10 is guided into the transmission channel 2362, which is not limited in this application. And, guide surface 2361 is set up in the side of guide plate 236 towards the direction of incoming material of pole piece 10, so that when first conveyor 100 carries pole piece 10 along first direction, pole piece 10 gets into transmission channel 2362 under the guide effect of guide surface 2361. In addition, pole piece 10 has the utmost point ear in the both sides of second direction, and deflector 236 still has the effect of smoothing the utmost point ear of pole piece 10 to ensure the size detection precision of pole piece 10, avoid because the crooked detection deviation that leads to of utmost point ear.

Optionally, referring to fig. 5 and fig. 6 in combination, since the guide plate 236 is provided, and in order to facilitate guiding the pole piece 10 into the conveying channel 2362, the guide plate 236 is generally disposed below the supporting columns 232 and between two adjacent supporting columns 232, at this time, if the position of the pinch roller 235 in the second direction is adjusted, the pinch roller 235 will press against the guide plate 236 instead of the pole piece 10. Therefore, at least two pressing holes 2363 are formed in the guide plate 236, the pressing holes 2363 are substantially in a long strip shape, and the number of the pressing holes 2363 corresponds to the number of the pressing wheels 235. As shown in fig. 6, when pressing wheel 235 is adjusted to be within the range of pressing plate 236, pressing wheel 235 can press pole piece 10 against first conveying device 100 through pressing hole 2363.

In addition, the height of the conveying channel 236 between the guide plate 236 and the first conveying device 100 is lower, and is only slightly larger than the thickness of the pole piece 10, so that the pole piece 10 can smoothly pass through the conveying channel. Therefore, the guide plate 236 not only guides the pole piece 10, but also assists in pressing the pole piece 10, so as to ensure the flatness of the pole piece 10.

In addition, in order to facilitate the size detection of the first detection device 300, the guide plate 236 is usually made of a transparent material, so that the first detection device 300 can acquire the image of the pole piece 10 located below the guide plate 236.

In the embodiment of the present application, please refer to fig. 7, the second auxiliary mechanism includes a second mounting seat 410, a first pressing roller 420, and a second pressing roller 430. The first pressing roller 420 and the second pressing roller 430 are disposed on the first conveying device 100 through the second mounting base 410 at intervals in the first direction, and the first pressing roller 420 and the second pressing roller 430 are disposed in parallel to each other. The first pressing roller 420 and the second pressing roller 430 are rotatably provided on the second mount 410. The first compression roller 420 and the second compression roller 430 are respectively used for abutting against two sides of the pole piece 10 along the first direction, and flattening the pole piece 10 on the first conveying device 100, so that the second detecting device 500 can detect the defect of the first surface of the pole piece 10. In fig. 7, the first direction is a direction from left to right, the first pressing roller 420 presses the left side of the pole piece 10, and the second pressing roller 430 presses the right side of the pole piece 10, so as to flatten the pole piece 10 on the first conveying device 100. The second inspection device 500 can perform defect inspection on the pole piece 10 positioned between the first pressing roller 420 and the second pressing roller 430.

Moreover, when the first conveying device 100 conveys the pole piece 10 to the first compression roller 420 and the second compression roller 430, the pole piece 10 is pressed against the first conveying device 100 by the first compression roller 420 and the second compression roller 430, and the first compression roller 420 and the second compression roller 430 rotate around respective axial directions under the action of friction force, so that the pole piece 10 is prevented from sliding relative to the first compression roller 420 and the second compression roller 430, and the surface of the pole piece 10 is prevented from being scratched.

Since the pole piece 10 has a first surface and a second surface, when detecting defects of the pole piece 10, the first surface and the second surface need to be detected. The above embodiments have described the first surface defect detection of the pole piece 10, and the description of the defect detection of the second surface of the pole piece 10 is started below.

In one embodiment, the pole piece detection apparatus further includes a second transportation apparatus 600, a third auxiliary mechanism 700, and a third detection apparatus 800. The second conveyor 600 is disposed downstream of the first conveyor 100, and when the first conveyor 100 conveys the pole piece 10 to the second conveyor 600, the second conveyor 600 grips the first surface of the pole piece 10 on the first conveyor 100, so that the pole piece 10 is transferred from the first conveyor 100 to the second conveyor 600, and conveys the pole piece 10 to the third auxiliary mechanism 800. At this time, the second surface of the pole piece 10 is not shielded, and the third detection device 800 can perform defect detection on the second surface of the pole piece 10. When the pole piece 10 is conveyed to the third auxiliary mechanism 700 by the second conveying device 600, the pole piece 10 is flattened by the third auxiliary mechanism 800, and the third detecting device 800 performs defect detection on the second surface of the pole piece 10.

In the embodiment of the present application, since the pole piece 10 already detects a defect on the first surface when being on the first conveyor 100, the second conveyor 600 mainly functions to grab the first surface of the pole piece 10, so that the second surface of the pole piece 10 is not blocked, so as to detect a defect on the second surface of the pole piece 10. In one embodiment, the second conveyor 600 is identical to the first conveyor 100 in construction, but is disposed upside down. Taking fig. 8 as an example, when the first conveyor 100 is a vacuum belt conveyor line, the second conveyor 600 may also be a vacuum belt conveyor line, and the second conveyor 600 may also include a vacuum belt, a driving wheel, a vacuum interface, and an adsorption platform. Compared with the first conveying device 100, the second conveying device 600 is arranged upside down, and the adsorption surface of the second conveying device 600 for adsorbing the pole piece 10 is opposite to the adsorption surface of the first conveying device 100 for adsorbing the pole piece 10. With this arrangement, the second conveyor 600 can adsorb the first surface of the pole piece 10 on the first conveyor 100, so that the pole piece 10 is transferred from the first conveyor 100 to the second conveyor 600. The first surface of the pole piece 10 is adsorbed by the second conveying device 600, and the second surface is not shielded, so that the third detection device 800 can detect the defect of the second surface of the pole piece 10.

In one embodiment, with continued reference to fig. 8, the feed end 610 of the second conveyor 600 is positioned above the discharge end 180 of the first conveyor 100 such that the pole piece 10 on the discharge end 180 of the first conveyor 100 can be grasped by the feed end 610 of the second conveyor 600 and the pole piece 10 transferred from the first conveyor 100 to the second conveyor 600. When the first conveyor 100 and the second conveyor 600 are vacuum belt conveyor lines, the first conveyor 100 may break vacuum at the discharge end 180, so that the pole piece 10 is sucked by the feed end 610 of the second conveyor 600. Optionally, the first conveyor 100 may be configured to apply positive pressure to the discharge end 180 to blow the pole piece 10 located at the discharge end 180 onto the vacuum belt of the second conveyor 600 for adsorption.

In the embodiment of the present application, the third auxiliary mechanism 700 and the third detection device 800 are both disposed on one side of the second conveying device 600 that grips the pole piece 10, so as to perform the flattening processing and the defect detection on the pole piece 10. The mechanism of the third assisting mechanism 700 is substantially the same as the second assisting mechanism 400 in structure and operation principle. Specifically, the third auxiliary mechanism 700 includes a third mounting seat (not shown), a third pressing roller (not shown), and a fourth pressing roller (not shown). The third press roller and the fourth press roller are arranged on the second conveying device 600 at intervals along the conveying direction of the second conveying device 600 through the third mounting seat, and the third press roller and the fourth press roller are rotatably arranged on the third mounting seat. The third pressing roller and the fourth pressing roller are respectively used for abutting against two sides of the pole piece 10 along the conveying direction of the second conveying device 600, and flattening the pole piece 10 on the second conveying device 600, so that the third detection device 800 can detect the defect of the second surface of the pole piece 10 conveniently. In addition, the structure and operation principle of the third detecting device 800 and the second detecting device 500 are substantially the same, and will not be described in detail here.

Optionally, the pole piece detecting device may further include a rejecting device 900, and the rejecting device 900 is disposed on the second conveying device 600 and is configured to transfer the defective pole piece 10 detected by the second detecting device 500 and the third detecting device 800 to the scrap collecting device 960. In one embodiment, with continued reference to fig. 8, the rejecting device 900 includes a rejecting drive member 910 and a rejecting member 920. The material rejecting driving member 910 is disposed on a side of the second conveying device 600 away from the first conveying device 100, one end of the material rejecting member 920 is connected to the material rejecting driving member 910, and the material rejecting member 920 can pass through the second conveying device 600 under the driving of the material rejecting driving member 910 and protrude out of the surface of the second conveying device 600 where the pole piece 10 is adsorbed, so that the pole piece 10 is separated from the adsorption surface of the second conveying device 600 and falls into the waste collecting device 960 along with gravity. The material rejecting driving member 910 may be a cylinder. Optionally, the pole piece detecting device may also be not provided with the rejecting device 900, and the vacuum may be broken directly when the pole piece 10 moves above the waste collecting device 960, and the pole piece 10 is no longer adsorbed by the second conveying device 600 and directly falls into the waste collecting device 960 due to gravity.

In the embodiment of the present application, the positions of the first auxiliary mechanism 200, the second auxiliary mechanism 400, and the third auxiliary mechanism 700 are not limited in sequence. That is, the size detection of the pole piece 10 can be performed first, and then the defect detection of the two surfaces can be performed respectively; or the surface defect can be detected firstly, and then the size can be detected; it is also possible to detect defects on one surface first, then the dimensions, and then the other surface. Can be adjusted according to the actual process and equipment design requirements, and the application does not limit the process and the equipment design requirements. The pole piece 10 can be continuously conveyed on the conveying device during detection, and can also be stopped at the first auxiliary mechanism 200 and the second auxiliary mechanism 400 for detection, which is not limited in the application.

In addition, according to the pole piece detection device provided by the application, the pole piece 10 is flattened when passing through the first auxiliary mechanism 200 and the second auxiliary mechanism 400 under the conveying of the first conveying device 100, so that the first detection device 300 and the second detection device 500 can perform size detection and defect detection, the detection in the conveying process can be realized, the transmission does not need to be stopped, and the conveying efficiency is improved.

Compared with the prior art, the pole piece detection device provided by the application has the following advantages at least:

1) and the size detection is carried out after the pole piece is flattened, so that the size detection precision is improved.

2) The pole pieces are flattened and then subjected to defect detection, so that the defect detection quality is improved, the missing detection and the false detection of the defective pole pieces are avoided, and meanwhile, the quality of the battery cell is also improved.

3) The detection without stopping can be realized, the size detection and the defect detection can be realized in the pole piece conveying process, and the detection efficiency is improved.

4) The second conveying device is arranged in an inverted hanging mode, pole pieces can be continuously conveyed when being transferred between the first conveying device and the second conveying device, pause is not needed, and conveying and detecting efficiency of the pole pieces is improved.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the claims. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. A pole piece detection device comprises a first conveying device, wherein the first conveying device is used for conveying a pole piece along a first direction, and the pole piece detection device is characterized by further comprising: the device comprises a first auxiliary mechanism, a first detection device, a second auxiliary mechanism and a second detection device;

2. The pole piece detection device of claim 1, wherein the first assist mechanism comprises: a first flattening assembly and a second flattening assembly;

the second direction is perpendicular to the first direction.

3. The pole piece detection device of claim 2, wherein the first flattening assembly and/or the second flattening assembly comprises at least two sets of pinch roller assemblies, the at least two sets of pinch roller assemblies being spaced apart along the first direction;

4. The pole piece testing device of claim 3, wherein said connection assembly comprises: the device comprises a support column, an adjusting block and a pinch roller mounting block;

the adjusting block is movably arranged on the supporting column;

5. The pole piece testing apparatus of claim 3 or 4, wherein said first flattening assembly and/or said second flattening assembly further comprises a guide plate;

6. The pole piece detection device of claim 5, wherein the guide plate is provided with a pressing hole, and the pressing wheel penetrates through the pressing hole to press the pole piece onto the first conveying device.

7. The pole piece detection device of claim 1, wherein the second assist mechanism comprises: the second mounting seat, the first press roller and the second press roller are arranged on the first mounting seat;

8. The pole piece testing device of claim 1, further comprising: the second conveying device, the third auxiliary mechanism and the third detection device;

9. The pole piece testing device of claim 8, further comprising a rejecting device and a waste collecting device;

10. The pole piece detection device of claim 8, wherein the third assist mechanism comprises: the third mounting seat, the third press roll and the fourth press roll are arranged on the frame;