CN211696261U - Sheet deformation detection device - Google Patents
Sheet deformation detection device Download PDFInfo
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- CN211696261U CN211696261U CN202020377593.4U CN202020377593U CN211696261U CN 211696261 U CN211696261 U CN 211696261U CN 202020377593 U CN202020377593 U CN 202020377593U CN 211696261 U CN211696261 U CN 211696261U
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- 238000001514 detection method Methods 0.000 title claims abstract description 72
- 238000003708 edge detection Methods 0.000 claims abstract description 61
- 239000000463 material Substances 0.000 claims abstract description 5
- 238000004519 manufacturing process Methods 0.000 claims description 11
- 230000002349 favourable effect Effects 0.000 abstract 1
- 238000000034 method Methods 0.000 description 7
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 5
- 229910052744 lithium Inorganic materials 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- WYTGDNHDOZPMIW-RCBQFDQVSA-N alstonine Natural products C1=CC2=C3C=CC=CC3=NC2=C2N1C[C@H]1[C@H](C)OC=C(C(=O)OC)[C@H]1C2 WYTGDNHDOZPMIW-RCBQFDQVSA-N 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
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Abstract
A sheet deformation detecting device comprising: a first detection unit and/or a second detection unit; the first detection unit comprises at least 3 groups of edge detection sensors which are arranged at intervals and are positioned on the same straight line, a connecting line between the edge detection sensors is parallel to the length direction of the sheet, and the distance D between the first group of edge detection sensors and the last group of edge detection sensors meets the following requirements: d is more than or equal to 0.7L and less than or equal to L, wherein L is the length of the sheet; the second detection unit comprises at least two distance sensors, and the distance sensors are respectively close to the edges of two sides of the sheet and are positioned above or below the sheet. The utility model discloses can detect whether there is snakelike deformation and/or wave deformation to the sheet, through edge detection sensor and the real-time feedback testing result of distance detection sensor, the degree of accuracy is high, is favorable to improving the product yield, and has reduced manpower, material resources cost.
Description
Technical Field
The utility model belongs to the technical field of the lithium cell is made, concretely relates to whether take place deformation to sheets such as pole piece in the lithium cell production process and carry out the device that detects.
Background
The lithium battery has the characteristics of small volume, light weight, high energy storage, long cycle life and the like, and has very wide application prospect in various industries. The pole piece is an important component of the lithium battery, and in the process of preparing the lithium battery, the pole piece can be subjected to a plurality of processes such as coating, rolling, slitting and sheet making, and the situation that the pole piece is deformed due to equipment abrasion and abnormal process can be avoided in the processes, so that the pole piece has quality defects such as 'wave piece', 'snake-shaped piece' and the like. Fig. 1 is a schematic diagram of a wavy pole piece, where the wavy pole piece 100 has wavy unevenness in the thickness direction when the pole piece 100 is laid on a plane 101, and particularly, the unevenness in the thickness direction is more prominent at the edge of the pole piece. Fig. 2 is a schematic diagram of a serpentine pole piece, which means that the side edges of the pole piece 100 are not straight, and the pole piece 100 is bent in the length direction. No matter the sheet is a snake-shaped sheet or a wave sheet, the quality of the battery cell is adversely affected due to the deformation of the pole piece.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a can take place like snakelike or wavy deformation to the pole piece and carry out the device that detects.
In order to achieve the above object, the present invention adopts the following technical solutions:
a sheet deformation detecting device comprising: a first detection unit and/or a second detection unit; the first detection unit comprises at least 3 groups of edge detection sensors which are arranged at intervals and are positioned on the same straight line, a connecting line between the edge detection sensors is parallel to the length direction of the sheet, and the distance D between the first group of edge detection sensors and the last group of edge detection sensors meets the following requirements: d is more than or equal to 0.7L and less than or equal to L, wherein L is the length of the sheet; the second detection unit comprises at least two distance sensors, and the distance sensors are respectively close to the edges of two sides of the sheet and are positioned above or below the sheet.
Further, the position of the edge detection sensor during detection corresponds to one side edge of the sheet.
Further, in the first detection unit, a group of edge detection sensors is disposed at a midpoint of the side edges of the sheet.
Further, in the first detection unit, a distance between the first group of edge detection sensors and the last group of edge detection sensors is equal to a length of the sheet.
Further, the edge detection sensors are opposite-type edge detection sensors, each edge detection sensor comprises a light projector and a light receiver corresponding to the light projector, and the sheet is located between the light projector and the light receiver.
Furthermore, the light projector of each group of edge detection sensors is arranged on a fixed rod, the light receiver of each group of edge detection sensors is arranged on another fixed rod, and the fixed rods are horizontally arranged and extend along the length direction of the sheet.
Furthermore, the fixing rod is provided with a slide rail which can slide the light projector of the edge detection sensor and/or the light receiver of the edge detection sensor.
Further, the distance between the projection of the distance sensor on the surface of the sheet and the side edge of the sheet on the same side of the projection is less than or equal to 5 mm.
Furthermore, the distance between the distance sensor and the surface of the sheet is 5-8 mm.
Optionally, the sheet material deformation detection device further comprises a processor connected to the first detection unit and/or the second detection unit, and the processor is configured to receive detection data sent by the first detection unit and/or the second detection unit, and determine whether the sheet material deforms according to the detection data.
Optionally, the processor is connected to a controller of the sheet production apparatus.
According to the above technical scheme, the utility model discloses a sheet deformation detection device is including being used for detecting whether there is snakelike deformation and/or wave deformation's detecting element, has included edge detection sensor and distance detection sensor in the detecting element, can feed back the testing result in real time, compares with artifical instrument measuring mode with, and the sensor detection accuracy is higher, and efficiency is higher, low in labor strength. The distance between the first group of edge detection sensors and the last group of edge detection sensors is 0.7L-L, L is the length of the sheet, more sheet information can be collected, and the accuracy of the measurement result can be guaranteed. In the preferred scheme, can handle and preserve the detection data output to the treater of detecting element, the production information of being convenient for traces back to can further link to each other with production facility's controller, when finding that the sheet has the deformation defect, the treater can send shutdown signal to the controller, so that the production personnel in time investigate the problem, avoid appearing the defective products in batches, improve the product yield.
Drawings
In order to illustrate the embodiments of the present invention more clearly, the drawings that are needed in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings can be obtained by those skilled in the art without inventive effort.
FIG. 1 is a schematic view of a wave plate;
FIG. 2 is a schematic view of a serpentine sheet;
fig. 3 is a schematic view of a first detecting unit according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of the detection principle of the edge detection sensor;
fig. 5 is a schematic view of a second detecting unit according to an embodiment of the present invention;
fig. 6 is a schematic diagram of the detection principle of the wave sheet.
The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.
Detailed Description
In order to make the above and other objects, features and advantages of the present invention more apparent, the following embodiments of the present invention will be described in detail with reference to the accompanying drawings.
As shown in fig. 3, the pole piece deformation detection apparatus of this embodiment includes a first detection unit, and the first detection unit is configured to detect whether a side edge of a pole piece is bent, that is, to detect whether the pole piece is a serpentine piece. The first detection unit comprises at least 3 groups of edge detection sensors 1 arranged at intervals along the length direction of the pole piece, and the edge detection sensors 1 are positioned on the same horizontal line. The edge detection sensor of the present embodiment adopts the opposite type edge detection sensor of the martial arts company, each set of edge detection sensors 1 includes one light projector 1-1 and one light receiver 1-2, all the light projectors 1-1 are arranged on one fixing rod 2, all the light receivers 1-2 are arranged on the other fixing rod 2, and the positions of the light projectors 1-1 and the positions of the light receivers 1-2 of the same set of edge detection sensors correspond. The two fixing rods 2 are both horizontally arranged, and the extending direction (the connecting line between the edge detection sensors) of the fixing rods 2 is parallel to the side edge of the pole piece 10. The plurality of inductors are installed together through the fixing rod, and the generation of errors can be reduced. The body to be detected (pole piece) is located between the light projector 1-1 and the light receiver 1-2, as shown in fig. 4, the light projecting surface of the light projector is parallel to the light receiving surface of the light receiver, and the optical axes are aligned, and the width of the body to be detected between the light projector and the light receiver for shielding the light projector is the detection value An of the edge detection sensor. The upper and lower positions of the light projector and the light receiver can be exchanged.
The first detection unit of the present embodiment includes 3 sets of edge detection sensors 1 uniformly spaced apart, and the distance D between the 1 st set of edge detection sensors 1 and the 3 rd set of edge detection sensors 1 corresponds to the length of the pole piece. Each group of edge detection sensors is connected with a processor, the detection values can be output to the processor in real time, and the processor carries out calculation according to the detection values so as to judge whether the pole piece deforms or not. In other embodiments, the distance D between the first set of edge-detecting sensors and the last set of edge-detecting sensors may also vary, for example, satisfying the following relationship: d is more than or equal to 0.7L and less than or equal to L, and L is the length of the sheet, so that more sheet information can be collected, and the detection result is more accurate.
When detecting the pole piece, the fixing rod 2 provided with the light projector 1-1 and the fixing rod 2 provided with the light receiver 1-2 are respectively fixed, the pole piece is arranged between the light projector 1-1 and the light receiver 1-2, in the embodiment, the light projector 1-1 is positioned above the pole piece, the light receiver 1-is positioned below the pole piece, the positions of the light projector 1-1 and the light receiver 1-2 are adjusted, and the difference value of the detection values output by the first group of edge detection sensors and the last group of edge detection sensors is within a set range (0.5mm), so that the arrangement position of the edge detection sensors is ensured to be parallel to the pole piece (side edge) during formal detection. In the multiple groups of edge detection sensors, one group of edge detection sensors is arranged at the midpoint of the side edge of the pole piece, namely at the position of half of the length of the pole piece. When in detection, the pole piece and the edge detection sensors do not move relatively, the distance between the side edges of the pole piece at different positions is detected through the edge detection sensors, the detection result is sent to the processor, the processor performs calculation according to the obtained detection value to determine the deformation result of the pole piece, and the calculation formula is as follows: a ═ MAX (| a2-a1|, | A3-a1|, …, | An-a1|, …, | An-a1|), where MAX denotes the maximum value, An denotes the detection value of the nth group of edge detection sensors, and N ═ 1,2, …, N are the number of edge detection sensors. And when the calculation result A is larger than the set value of the coverage margin (such as 1.5mm), the pole piece is considered to be a snake-shaped piece and does not meet the quality requirement. The set value of the coverage allowance is an empirical value, and the values of the battery cores are different when the battery core models are different. Preferably, the processor can be connected with a controller of the pole piece production equipment to realize real-time online detection feedback, when a result obtained by calculation according to the detection value of the processor is larger than a set value of the coverage margin, an alarm signal is sent to the controller, the controller controls the equipment to stop, and a worker can check the equipment condition in time, eliminate the deformation reason of the pole piece and improve the product yield. The pole piece that takes place snakelike deformation shows that pole piece edge takes place unsmooth deformation in length direction, but the width of pole piece is unchangeable, when the pole piece has one side edge to appear warping, corresponding deformation also can take place in another side edge, consequently only set up with the edge detection sensor in pole piece one side edge in this implementation, just can detect out whether the pole piece is snakelike piece, nevertheless in other embodiments, also can all set up the edge detection sensor in the both sides edge of pole piece, detect the both sides edge of pole piece simultaneously. The fixed rod 2 is respectively provided with a sliding rail which can slide the light projector 1-1 and/or the light receiver 1-2, so that the distance between the edge detection sensors can be adjusted, and the measurement of pole pieces with different lengths is met.
As shown in fig. 5, the pole piece deformation detection apparatus of this embodiment further includes a second detection unit, and the second detection unit is configured to detect whether the thickness of the pole piece is uniform, that is, whether the pole piece is a wave piece. The second detecting unit comprises at least two distance sensors 3, and the distance sensors 3 are arranged on the same side of the pole piece 10 (above the pole piece or below the pole piece). Because the fluctuation of the surface thickness of the pole piece is obvious at the edge of the pole piece and is not obvious at the inner side (middle) of the pole piece, namely, the wave-shaped deformation mainly occurs at the edge of the pole piece, the distance sensors 3 are preferably arranged close to the edges of the two sides of the pole piece respectively in the embodiment, and the distance sensors 3 are used for detecting the unevenness of the surface of the pole piece. More specifically, the distance between the projection of the distance sensor 3 on the surface of the pole piece and the side edge of the pole piece on the same side of the projection is less than or equal to 5mm, and the distance (set height) between the distance sensor 3 and the surface of the pole piece is 5-8 mm.
During detection, relative motion exists between the distance sensor 3 and the pole piece 10 in the length direction of the pole piece, the position of the distance sensor 3 is fixed in the embodiment, the pole piece 10 moves along the length direction of the pole piece, the two distance sensors 3 respectively detect the distance between the pole piece and the surface of the pole piece 10 in the moving process, the fluctuation value L (shown in figure 6) of the surface flatness of the pole piece is determined according to the distance detection value, the fluctuation value L of the surface of the pole piece is Amax-Amin, Amax is the maximum detection value of the two distance sensors in the detection process, Amin is the minimum detection value of the two distance sensors in the detection process, and if the fluctuation value L of the surface flatness of the pole piece is greater than a fluctuation set value (such as 2.0mm), the pole piece is considered as a wavy piece and does not accord with the quality requirement. When the number of the distance sensors is more than 2, the distance sensors are arranged on two sides of the pole piece at intervals along the length direction.
The utility model discloses but first detecting element and second detecting element among the detection device exclusive use are used for detecting whether there is snakelike deformation or wave deformation in the pole piece respectively, also can put together and use, detect the pole piece simultaneously whether snakelike piece and wave piece, guarantee the pole piece quality. And after the first detection unit and the second detection unit send the detection data to the processor for calculation, the processor can store the data, thereby realizing the tracing of the production data and providing data support for solving the problem of production quality. The treater links to each other with pole piece production facility's controller simultaneously, and the treater can in time be with detecting unqualified signal transmission for production facility's controller, makes the producer in time discover the problem to correct the problem, take place in order to reduce the bad condition of product, avoid bringing the influence to the subsequent handling, compare in the mode of artifical selective examination, both reduced manpower, material resources, improved efficiency, also promote the product yield, guarantee product quality.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A sheet deformation detecting device, comprising: a first detection unit and/or a second detection unit;
the first detection unit comprises at least 3 groups of edge detection sensors which are arranged at intervals and are positioned on the same straight line, a connecting line between the edge detection sensors is parallel to the length direction of the sheet, and the distance D between the first group of edge detection sensors and the last group of edge detection sensors meets the following requirements: d is more than or equal to 0.7L and less than or equal to L, wherein L is the length of the sheet;
the second detection unit comprises at least two distance sensors, and the distance sensors are respectively close to the edges of two sides of the sheet and are positioned above or below the sheet.
2. The sheet deformation detecting apparatus according to claim 1, wherein: the position of the edge detection sensor corresponds to one side edge of the sheet material during detection.
3. The sheet deformation detecting apparatus according to claim 1, wherein: in the first detection unit, a group of edge detection sensors is disposed at a midpoint of side edges of the sheet.
4. The sheet deformation detecting apparatus according to claim 1, wherein: the edge detection sensors are correlation type edge detection sensors, each edge detection sensor comprises a light projector and a light receiver corresponding to the light projector, and the sheet is located between the light projector and the light receiver.
5. The sheet deformation detecting apparatus according to claim 4, wherein: the light projector of each group of edge detection sensors is arranged on a fixed rod, the light receiver of each group of edge detection sensors is arranged on the other fixed rod, and the fixed rods are horizontally arranged and extend along the length direction of the sheet.
6. The sheet deformation detecting apparatus according to claim 5, wherein: the fixing rod is provided with a sliding rail which can slide the light projector of the edge detection sensor and/or the light receiver of the edge detection sensor.
7. The sheet deformation detecting apparatus according to claim 1, wherein: the distance between the projection of the distance sensor on the surface of the sheet and the side edge of the sheet on the same side of the distance sensor is less than or equal to 5 mm.
8. The sheet deformation detecting apparatus according to claim 1 or 5, wherein: the distance between the distance sensor and the surface of the sheet is 5-8 mm.
9. The sheet deformation detecting apparatus according to claim 1, wherein: the sheet deformation detection device comprises a first detection unit and a second detection unit, and is characterized by further comprising a processor connected with the first detection unit and/or the second detection unit, wherein the processor is used for receiving detection data sent by the first detection unit and/or the second detection unit and judging whether the sheet deforms or not according to the detection data.
10. The sheet deformation detecting apparatus according to claim 9, wherein: the processor is connected with the controller of the sheet production equipment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020377593.4U CN211696261U (en) | 2020-03-23 | 2020-03-23 | Sheet deformation detection device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020377593.4U CN211696261U (en) | 2020-03-23 | 2020-03-23 | Sheet deformation detection device |
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| CN211696261U true CN211696261U (en) | 2020-10-16 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113344924A (en) * | 2021-08-05 | 2021-09-03 | 金成技术有限公司 | Structural member production control method and system based on image processing |
| CN113649299A (en) * | 2021-08-26 | 2021-11-16 | 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 |
-
2020
- 2020-03-23 CN CN202020377593.4U patent/CN211696261U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113344924A (en) * | 2021-08-05 | 2021-09-03 | 金成技术有限公司 | Structural member production control method and system based on image processing |
| CN113344924B (en) * | 2021-08-05 | 2021-10-29 | 金成技术有限公司 | Structural member production control method and system based on image processing |
| CN113649299A (en) * | 2021-08-26 | 2021-11-16 | 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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