CN115722418A - Coating quality detection method and system - Google Patents
Coating quality detection method and system Download PDFInfo
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- CN115722418A CN115722418A CN202111015359.2A CN202111015359A CN115722418A CN 115722418 A CN115722418 A CN 115722418A CN 202111015359 A CN202111015359 A CN 202111015359A CN 115722418 A CN115722418 A CN 115722418A
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- 238000000576 coating method Methods 0.000 title claims abstract description 1251
- 239000011248 coating agent Substances 0.000 title claims abstract description 1242
- 238000001514 detection method Methods 0.000 title claims abstract description 323
- 239000000463 material Substances 0.000 claims abstract description 44
- 230000005540 biological transmission Effects 0.000 claims abstract description 36
- 238000001035 drying Methods 0.000 claims description 92
- 239000000758 substrate Substances 0.000 claims description 46
- 238000007689 inspection Methods 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 8
- 230000009471 action Effects 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 24
- 239000002002 slurry Substances 0.000 description 19
- 230000007246 mechanism Effects 0.000 description 9
- 238000003908 quality control method Methods 0.000 description 6
- 239000010410 layer Substances 0.000 description 5
- 239000011247 coating layer Substances 0.000 description 4
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 3
- 229910052744 lithium Inorganic materials 0.000 description 3
- 238000009825 accumulation Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000001556 precipitation Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000001739 density measurement Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000007773 negative electrode material Substances 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 239000007774 positive electrode material Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C11/00—Component parts, details or accessories not specifically provided for in groups B05C1/00 - B05C9/00
- B05C11/10—Storage, supply or control of liquid or other fluent material; Recovery of excess liquid or other fluent material
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Abstract
The application provides a coating quality detection method and system, and relates to the technical field of battery manufacturing. The coating quality detection method comprises the following steps: judging whether the detection position belongs to a first coating area or a second coating area of the base material; acquiring a first actual coating length of the first coating area along the transmission direction of the base material and a second actual coating length of the second coating area along the transmission direction of the base material according to the judgment result; and adjusting the coating lengths of the first coating area and the second coating area to be coated according to the first actual coating length and the second actual coating length so as to control the coating length of the first coating area to be coated and the coating length of the second coating area to be coated within a preset range. The coating length of the first coating area to be coated and the coating length of the second coating area to be coated can be controlled within a preset range, so that the coating lengths of the first coating area and the second coating area can meet production requirements, and the coating quality is improved.
Description
Technical Field
The application relates to the technical field of battery manufacturing, in particular to a coating quality detection method and system.
Background
The coating process is widely applied to coating and composite packaging of substrates such as paper, films and the like. The coating process is also a key process for manufacturing the battery, the coating quality is closely related to the capacity, service life, safety and the like of the battery, the coating process in the field of manufacturing the battery at present mainly depends on manual quality control and adjustment, the control precision is low, the adjustment speed is slow, the production efficiency is low, a large amount of material waste is caused, a large amount of labor cost is increased, and the enterprise profit is seriously influenced.
Therefore, how to improve the coating quality becomes a technical problem to be solved in the technical field of battery manufacturing.
Disclosure of Invention
The embodiment of the application provides a coating quality detection method and system, which aim to improve the coating quality of a pole piece in the battery manufacturing process.
In a first aspect, an embodiment of the present application provides a coating quality detection method, including:
judging whether the detection position belongs to a first coating area or a second coating area of the base material, wherein the coating thickness of the first coating area is larger than that of the second coating area;
acquiring a first actual coating length of the first coating area along the transmission direction of the base material and a second actual coating length of the second coating area along the transmission direction of the base material according to a judgment result;
and adjusting the coating length of a first coating area to be coated according to the first actual coating length, and adjusting the coating length of a second coating area to be coated according to the second actual coating length, so as to control the coating length of the first coating area to be coated and the coating length of the second coating area to be coated within a preset range.
In the above technical solution, a first actual coating length of a coated first coating area and a second actual coating length of a coated second coating area are obtained, the first actual coating length and a preset coating length of the first coating area are compared, if the first actual coating length does not satisfy the preset coating length of the first coating area, the coating length of the first coating area that is not yet coated needs to be adjusted, the second actual coating length and the preset coating length of the second coating area are compared, and if the second actual coating length does not satisfy the preset coating length of the second coating area, the coating length of the second coating area that is not yet coated needs to be adjusted, so that the coating length of the first coating area to be coated and the coating length of the second coating area to be coated are controlled within a preset range, so that the coating lengths of the first coating area and the second coating area both satisfy production requirements, and the coating quality is improved.
In some embodiments of the first aspect of the present application, the obtaining a first actual coating length of the first coating region along the driving direction of the substrate and a second actual coating length of the second coating region along the driving direction of the substrate according to the determination result includes: obtaining the first actual coating length, including:
acquiring a transverse coordinate of the detection position along the transmission direction of the base material;
acquiring the first actual coating length L based on the transverse coordinates of the detection position n Wherein L is n ＝Σ(y n+1 -y n )，y n+1 A transverse coordinate, y, representing the (n + 1) th coating position among the detection positions n Is a transverse coordinate of an nth coating position in the detection positions, wherein n is a natural number greater than or equal to 0;
obtaining the second actual coating length comprising:
acquiring a transverse coordinate of the detection position along the transmission direction of the base material;
acquiring the second actual coating length H based on the transverse coordinates of the detection position n Wherein H is n ＝Σ(h n+1 -h n )，h n+1 Represents the transverse coordinate of the (n + 1) th coating position in the detection positions, h n N is a natural number equal to or greater than 0, which is a lateral coordinate of an nth coating position among the detection positions.
In the technical scheme, the first actual coating length of the coated first coating area and the second actual coating length of the coated second coating area are obtained by adopting an accumulation mode, the transverse coordinates of the positions of the coated first coating area and the coated second coating area are continuously detected, and the transverse coordinate difference values between adjacent positions are sequentially accumulated until the last transverse coordinate of the coated first coating area and the last transverse coordinate of the coated second coating area are obtained, so that the first actual coating length and the second actual coating length are obtained, the actual coating length is more accurately detected, the coating lengths of the first coating area to be coated and the second coating area to be coated can be more accurately adjusted, and the coating quality is better.
In some embodiments of the first aspect of the present application, the obtaining a first actual coating length of the first coating region along the driving direction of the substrate and a second actual coating length of the second coating region along the driving direction of the substrate according to the determination result includes:
obtaining the first actual coating length, comprising:
acquiring a coating starting transverse coordinate y of the detection position along the transmission direction of the base material Starting point And acquiring a coating termination transverse coordinate y of the detection position along the transmission direction of the base material Terminal The first actual coating length L n ＝y Final (a Chinese character of 'gan') -y Starting point ；
Obtaining the second actual coating length comprising:
acquiring a coating start transverse coordinate h of the detection position along the transmission direction of the base material Starting from And acquiring a coating termination transverse coordinate h of the detection position along the transmission direction of the base material Final (a Chinese character of 'gan') The second actual coating length H n ＝h Terminal -h Starting from 。
According to the technical scheme, the first practical coating length is obtained by obtaining the difference value between the coating starting transverse coordinate and the coating ending transverse coordinate in the first coating area, the second practical coating length is obtained by obtaining the difference value between the coating starting transverse coordinate and the coating ending transverse coordinate in the second coating area, the obtaining mode is simple and convenient, the feedback frequency is less, and the detection efficiency is improved.
In some embodiments of the first aspect of the present application, the determining whether the detection location belongs to a first coating region or a second coating region of the substrate comprises: judging whether the detection position belongs to a first coating area or a second coating area according to the coating thickness of the detection position;
the coating quality detection method further comprises the following steps:
acquiring a first actual coating thickness of the first coating area and a second actual coating thickness of the second coating area according to a judgment result;
and adjusting the coating thickness of a first coating area to be coated according to the first actual coating thickness, and adjusting the coating thickness of a second coating area to be coated according to the second actual coating thickness, so as to control the coating thickness of the first coating area to be coated and the coating thickness of the second coating area to be coated within a preset range.
In the above technical solution, a first actual coating thickness of a coated first coating area and a second actual coating thickness of a coated second coating area are obtained, the first actual coating thickness is compared with a preset coating thickness of the first coating area, if the first actual coating thickness does not satisfy the preset coating thickness of the first coating area, the coating length of the first coating area that is not coated yet needs to be adjusted, the second actual coating thickness is compared with the preset coating thickness of the second coating area, and if the second actual coating thickness does not satisfy the preset coating thickness of the second coating area, the coating thickness of the second coating area that is not coated yet needs to be adjusted, so that the coating thickness of the first coating area to be coated and the coating thickness of the second coating area to be coated are controlled within a preset range, so that the coating thicknesses of the first coating area and the second coating area both satisfy production requirements, and the coating quality is improved.
In some embodiments of the first aspect of the present application, the coating quality detection method further comprises:
acquiring a first actual coating surface density of the first coating area and a second actual coating surface density of the second coating area according to a judgment result;
adjusting the coating surface density of a first coating area to be coated according to the first actual coating surface density, and adjusting the coating surface density of a second coating area to be coated according to the second actual coating surface density, so as to control the coating surface density of the first coating area to be coated and the coating surface density of the second coating area to be coated within preset ranges.
In the above technical solution, a first actual coating surface density of a coated first coating area and a second actual coating surface density of a coated second coating area are obtained, the first actual coating surface density is compared with a preset coating surface density of the first coating area, if the first actual coating surface density does not satisfy the preset coating surface density of the first coating area, the coating surface density of the first coating area that is not coated yet needs to be adjusted, the second actual coating surface density is compared with the preset coating surface density of the second coating area, and if the second actual coating surface density does not satisfy the preset coating surface density of the second coating area, the coating surface density of the second coating area that is not coated yet needs to be adjusted, so that the coating surface density of the first coating area to be coated and the coating surface density of the second coating area to be coated are controlled within a preset range, so that the coating surface densities of the first coating area and the second coating area both satisfy production requirements, the coating flatness is ensured, and the coating quality is improved.
In some embodiments of the first aspect of the present application, obtaining the first actual coating areal density of the first coated region comprises:
acquiring the coating surface density of the detection position before the coating at the detection position is dried and acquiring the coating surface density of the detection position after the coating at the detection position is dried;
obtaining a second actual coating areal density of the second coating region, comprising:
and acquiring the coating surface density of the second coating area before the coating at the detection position is dried, and acquiring the coating surface density at the detection position after the coating at the detection position is dried.
In the technical scheme, the coating surface density of the detection position can be corrected and detected twice before and after drying by acquiring the surface density of the detection position before drying and the surface density of the detection position after drying, so that the surface density of the first coating area and the second coating area to be coated can be adjusted twice, and the coating quality is further improved. If the coating surface density before drying is only controlled, the coating surface density may become uneven after the drying process, and the coating requirement is not met; if the coating surface density after drying is only controlled, a distance is reserved from the coating position to the drying position, so that the adjustment has hysteresis, the adjustment is not in time, and the controllable parameters are not in time to adjust. The surface density of the detection position can be detected before drying to judge whether the surface density is qualified or not in advance, primary adjustment can be carried out, secondary detection and calibration are carried out after drying, secondary adjustment and correction are carried out to form a closed loop, the coating surface densities of a first coating area to be coated and a second coating area to be coated are better controlled, and the purposes of consistency of the coating surface density of the first coating area and the coating surface density of the second coating area of the substrate are achieved.
In some embodiments of the first aspect of the present application, obtaining a first actual coating thickness of the first coated region comprises:
acquiring the coating thickness of the detection position before the coating of the detection position is dried and acquiring the coating thickness of the detection position after the coating of the detection position is dried;
obtaining a second actual coating thickness of the second coated region, comprising:
and acquiring the coating thickness of the detection position before the coating at the detection position is dried, and acquiring the coating thickness of the detection position after the coating at the detection position is dried.
According to the technical scheme, the surface density of the detection position before drying and the coating thickness of the detection position after drying are obtained, the coating thickness of the detection position can be detected twice before and after drying, the thickness of the first coating area and the second coating area to be coated can be adjusted twice, and the coating quality is further improved. If the coating thickness before drying is only controlled, the coating thickness may become uneven after the drying process, and the coating requirement is not met; if the coating thickness after drying is only controlled, a distance is reserved from the coating position to the drying position, so that the adjustment has hysteresis, the adjustment is not in time, and the controllable parameters are not in time to adjust. Whether the coating thickness is qualified or not can be judged in advance by detecting the coating thickness at the detection position before drying, primary adjustment can be carried out, secondary detection and correction are carried out after drying, secondary adjustment and closed loop correction are carried out, the coating thicknesses of a first coating area to be coated and a second coating area to be coated are better controlled, and the purposes of coating thickness consistency of the first coating area and the coating thickness of the second coating area of the base material are achieved.
In a second aspect, an embodiment of the present application provides a coating quality detection system, which includes a distinguishing and identifying device and a control device; the area identification device is configured to judge whether a detection position belongs to a first coating area or a second coating area of a base material, and obtain a first actual coating length of the first coating area along the transmission direction of the base material and a second actual coating length of the second coating area along the transmission direction of the base material according to the judgment result, wherein the coating thickness of the first coating area is larger than that of the second coating area; the control device is configured to control the action of the coating device according to the first actual coating length and the second actual coating length so as to control the coating length of the first coating area to be coated and the coating length of the second coating area to be coated within a preset range.
In the above technical solution, the control device controls the coating device to operate according to the first actual coating length of the coated first coating region and the second actual coating length of the coated second coating region, so as to control the coating length of the first coating region to be coated and the coating length of the second coating region to be coated within a preset range, so that the coating lengths of the first coating region and the second coating region both meet the production requirement, and improve the coating quality.
In some embodiments of the second aspect of the present application, the coating quality detection system further comprises an areal density detection device configured to detect an actual coating areal density of the detection location.
In the technical scheme, the surface density detection device is used for detecting the actual coating surface density of the detection position and feeding back an actual surface density signal to the control device so as to control the coating device to adjust the surface density of the first coating area to be coated and the coating surface density of the second coating area to be coated, so that the coating surface densities of the first coating area and the second coating area both meet the production requirement, the coating flatness is ensured, and the coating quality is improved.
In some embodiments of the first aspect of the present application, the areal density detection device comprises a first detection member and a second detection member; the first detecting member is configured to detect a coating areal density of the detection position before drying of the coating at the detection position, and the second detecting member is configured to detect a coating areal density of the detection position after drying of the coating at the detection position.
In the technical scheme, the first detection piece is used for detecting the coating surface density of the detection position before the coating at the detection position is dried, the second detection piece is used for detecting the coating surface density of the detection position after the coating at the detection position is dried, and the control device controls the coating device to act according to the surface density signals detected by the first detection piece and the second detection piece so as to adjust the coating surface density of the base material twice and further improve the coating quality. If the coating surface density before drying is only controlled, the coating surface density may become uneven after the drying process, and the coating requirement is not met; if the dried coating surface density is only controlled, a distance is reserved from the coating position to the drying position, so that the adjustment has hysteresis, the adjustment is not in time, and the controllable parameters are not in time to be adjusted. The surface density of the detection position can be detected before drying to judge whether the coating surface density is qualified or not in advance, primary adjustment can be carried out, secondary detection and correction are carried out after drying, secondary adjustment and closed loop correction are carried out, the coating surface densities of a first coating area to be coated and a second coating area to be coated are better controlled, and the purposes of coating surface density consistency of the first coating area and the coating surface density of the second coating area of the substrate are achieved.
In some embodiments of the first aspect of the present application, the coating quality detection system further comprises a thickness detection device configured to detect an actual coating thickness at the detection position.
In the technical scheme, the thickness detection device is used for detecting the actual coating thickness of the detection position and feeding back an actual thickness signal to the control device so as to control the coating device to adjust the coating thickness of the first coating area to be coated and the coating thickness of the second coating area to be coated, so that the coating thicknesses of the first coating area and the second coating area meet the production requirement, and the coating quality is improved.
In some embodiments of the first aspect of the present application, the thickness detection device comprises a third detection member and a fourth detection member;
the third detecting element is configured to detect the coating thickness of the detection position before the coating at the detection position is dried, and the fourth detecting element is configured to detect the coating thickness of the detection position after the coating at the detection position is dried.
In the technical scheme, the third detection piece is used for detecting the coating thickness of the detection position before the coating at the detection position is dried, the fourth detection piece is used for detecting the coating thickness of the detection position after the coating at the detection position is dried, and the control device controls the coating device to act according to the coating thickness signals detected by the third detection piece and the fourth detection piece so as to adjust the coating thickness of the base material twice and further improve the coating quality. If the coating thickness before drying is only controlled, the coating thickness may become uneven after the drying process, and the coating requirement is not met; if the coating thickness after drying is only controlled, a distance is reserved from the coating position to the drying position, so that the adjustment has hysteresis, the adjustment is not in time, and the controllable parameters are not in time to adjust. Whether the coating surface density is qualified or not can be judged in advance by detecting the coating thickness of the detection position before drying, primary adjustment can be carried out, secondary detection and calibration are carried out after drying, secondary adjustment and correction are carried out to form a closed loop, the coating thicknesses of a first coating area to be coated and a second coating area to be coated are better controlled, and the purposes of coating thickness consistency of the first coating area and the coating thickness of the second coating area of the base material are achieved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained from the drawings without inventive effort.
FIG. 1 is a schematic diagram of a substrate coated with alternating thick and thin coatings according to an embodiment of the present disclosure;
FIG. 2 is a flow chart of a coating quality control method provided by some embodiments of the present application;
FIG. 3 is a schematic view of a coating apparatus according to some embodiments of the present disclosure;
FIG. 4 is a flow chart of a coating quality control method according to further embodiments of the present application;
FIG. 5 is a flow chart of a coating quality control method according to still other embodiments of the present application;
FIG. 6 is a flow chart of a coating quality control method according to further embodiments of the present application;
FIG. 7 is a flow chart of a coating quality control method provided by some embodiments of the present application;
FIG. 8 is a trace plot of coating areal density measurements in some embodiments of the present application;
fig. 9 is a schematic diagram of the relative relationship between the first detecting member and the second detecting member and the drying mechanism.
An icon: 1-a substrate; 1 a-a first coated region; 1 b-a second coated area; 1 c-white space; 2-coating; 3-a transmission mechanism; 1000-a coating device; 100-coating head; 10-upper mould; 20-lower die; 30-middle mold; 40-a first slurry channel; 41-a first coating port; 50-a second slurry channel; 51-a second coating port; 60-an adjusting part; 200-a first feed assembly; 300-a second feed assembly; 500-a drying mechanism; 2000-coating quality detection system; 2100-an areal density detection device; 2110-first detecting member; 2120-a second detecting member; a-the driving direction of the substrate; b-scanning the trajectory.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
It should be noted that, in the present application, the embodiments and features of the embodiments may be combined with each other without conflict.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined or explained in subsequent figures.
In the description of the embodiments of the present application, it should be noted that the indication of orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship which is usually placed when the product of the application is used, or the orientation or positional relationship which is usually understood by those skilled in the art, or the orientation or positional relationship which is usually placed when the product of the application is used, and is only for the convenience of describing the application and simplifying the description, but does not indicate or imply that the indicated device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the application. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
With the increasing market demand of lithium batteries, higher requirements are also put forward on the electrical performance and safety performance of the batteries, and in order to improve the electrical performance and safety performance of the batteries, technicians seek improvements from a plurality of conveniences, wherein the quality of a coating process in the manufacturing process of the batteries has an important influence on the forming quality of pole pieces of the batteries.
The coating process of the pole pieces of the electrode assembly of the battery in different forms can be different, for example, a square battery, the electrode assembly of the square battery has a straight area and a bent area connected to two ends of the straight area, the bent area is an area where lithium precipitation is easy to occur, in order to improve the problem of lithium precipitation of the bent area, at present, the thickness of the positive active material layer of the positive pole piece in the bent area and/or the thickness of the negative active material layer of the negative pole piece in the bent area can be reduced relative to the straight area, as shown in fig. 1, so that the positive pole piece and the negative pole piece form a coating 2 with alternate thicknesses along the length direction of the substrate 1, and a first coating area 1a with a larger coating thickness and a second coating area 1b with a smaller coating thickness are defined.
The inventor finds that pole pieces with different thicknesses have high requirements on a coating process, and the difficulty in controlling the length of a thick coating area and the length of a thin coating area within a preset range is high, so that the corresponding coating area is not in a preset position after the pole pieces are wound into an electrode assembly, and the battery performance is poor.
Based on this, the embodiment of the present application provides a coating quality detection method, which detects a first actual coating length of a coated first coating area (thick coating area) and a second actual coating length of a coated second coating area (thin coating area), adjusts the coating length of the first coating area to be coated according to the first actual coating length, and adjusts the coating length of the second coating area to be coated according to the second actual coating length, so that the coating length of the first coating area to be coated and the coating length of the second coating area to be coated are controlled within a preset range, so that the coating lengths of the first coating area and the second coating area both meet production requirements, the coating quality is improved, and the forming quality of a pole piece is improved.
As shown in fig. 2, some embodiments of the present application provide a coating quality detection method, including:
step S100, judging whether the detection position belongs to a first coating area or a second coating area of the substrate 1, wherein the coating thickness of the first coating area is larger than that of the second coating area;
step S200, acquiring a first actual coating length of the first coating area along the transmission direction A of the base material and a second actual coating length of the second coating area along the transmission direction A of the base material according to the judgment result;
step S300, adjusting the coating length of the first coating region to be coated according to the first actual coating length, and adjusting the coating length of the second coating region to be coated according to the second actual coating length, so as to control the coating length of the first coating region to be coated and the coating length of the second coating region to be coated within a preset range.
The first coating region and the second coating region have different coating thicknesses, and the preset coating length of the first coating region and the preset coating length of the second coating region may also be different, then the step S300 of controlling the coating length of the first coating region to be coated and the coating length of the second coating region to be coated within the preset range means that the coating length of the first coating region to be coated and the coating length of the second coating region to be coated are controlled within respective preset ranges, the preset range of the coating length of the first coating region and the preset range of the coating length of the second coating region do not overlap, and the minimum value of the preset range of the coating length of the first coating region may be greater than the maximum value of the preset range of the coating length of the second coating region, or the minimum value of the preset range of the coating length of the second coating region may be greater than the maximum value of the preset range of the coating length of the first coating region.
In step S100, the detection position is a part or all of one of the coated first coating region and the coated second coating region. The detection position may be a certain point position or a certain partial region in the coated first coating region, or the detection position may be a certain point position or a certain partial region in the coated second coating region.
In step S200, "obtaining a first actual coating length of the first coating region along the transmission direction a of the substrate and a second actual coating length of the second coating region along the transmission direction a of the substrate according to the determination result" means that the determination result is the determination structure in step S100, and the detection position belongs to the first coating region or the second coating region, if the detection position belongs to the first coating region in step S100, the coating length of the detection position is the first actual coating length of the coated first coating region, the first actual coating length should be compared with the preset range of the coating length of the first coating region, and if the first actual coating length does not belong to the preset range of the coating length of the first coating region, the coating length of the first coating region to be coated needs to be adjusted, so that the coating length of the first coating region to be coated is controlled within the preset range; if the detection position is determined to belong to the second coating area in step S100, the coating length of the detection position is the second actual coating length of the coated second coating area, and the second actual coating length should be compared with the preset range of the coating length of the second coating area, and if the second actual coating length does not belong to the preset range of the coating length of the second coating area, the coating length of the second coating area to be coated needs to be adjusted so that the coating length of the second coating area to be coated is controlled within the preset range.
Generally, the coating layer 2 is coated on the substrate 1 by the coating device 1000, the position of the coating device 1000 is fixed, the substrate 1 is driven by the transmission mechanism 3 to transmit relative to the coating device 1000, and the coating device 1000 coats the coating layer 2 on the surface of the substrate 1 during the transmission of the substrate 1.
The coating length can be adjusted by the coating apparatus 1000. As shown in fig. 3, a schematic view of a structure of a coating apparatus is shown in fig. 3. The coating apparatus includes a coating head 100, the coating head 100 includes an upper die 10, a middle die 30, and a lower die 20, the upper die 10 and the middle die 30, a first slurry passage 40 is formed between a lower surface of the upper die 10 and an upper surface of the middle die 30, the first slurry passage 40 has a first coating port 41, a second slurry passage 50 is formed between a lower surface of the middle die 30 and an upper surface of the lower die 20, and the second slurry passage 50 has a second coating port 51.
The coating equipment comprises a first feeding assembly 200 and a second feeding assembly 300, wherein the first feeding assembly 200 is used for providing slurry for a first slurry channel 40, the second feeding assembly 300 is used for providing slurry for a second slurry channel 50, the slurry for the first slurry channel 40 can be extruded through a first coating port to be coated on a substrate 1, the slurry for the second slurry channel 50 can be extruded through a second coating port to be coated on the substrate 1, when the slurry is extruded from the first coating port and the second coating port, the coating head 100 can coat two layers of coatings 2 on the substrate 1 to realize double-layer coating, and when the slurry is extruded from one of the first coating port and the second coating port, the coating head 100 can coat one layer of coatings 2 on the substrate 1 to realize single-layer coating.
The coating head 100 further includes an adjusting member 60, and the upper mold 10 and/or the lower mold 20 are movably provided with the adjusting member 60, and when the adjusting member 60 is disposed on the upper mold 10, the adjusting member 60 is used to adjust a flow rate of the first slurry passage 40, and when the adjusting member 60 is disposed on the lower mold 20, the adjusting member 60 is used to adjust a flow rate of the second slurry passage 50, thereby adjusting thicknesses of the slurries extruded from the first coating port and the second coating port, thereby adjusting a coating thickness of the first coating region to be coated and a coating thickness of the second coating region to be coated.
When the distance of the substrate 1 relative to the transmission of the coating head 100 is within the preset range of the coating length of the first coating area and the coating length of the second coating area, the coating thickness of the coating head 100 is timely adjusted, so that the coating length of the first coating area to be coated and the coating length of the second coating area to be coated are within the preset range.
The method comprises the steps of obtaining a first actual coating length of a coated first coating area and a second actual coating length of a coated second coating area, comparing the first actual coating length with a preset coating length of the first coating area, if the first actual coating length does not meet the preset coating length of the first coating area, adjusting the coating length of the first coating area which is not coated yet, comparing the second actual coating length with the preset coating length of the second coating area, and if the second actual coating length does not meet the preset coating length of the second coating area, adjusting the coating length of the second coating area which is not coated yet, so that the coating length of the first coating area to be coated and the coating length of the second coating area to be coated are controlled within a preset range, and the coating lengths of the first coating area and the second coating area both meet production requirements, and coating quality is improved.
Referring to fig. 4, in some embodiments, obtaining a first actual coating length of the first coating area along the driving direction a of the substrate and a second actual coating length of the second coating area along the driving direction a of the substrate according to the determination result includes:
step S210, obtaining a first actual coating length, including:
acquiring a transverse coordinate of the detection position along the transmission direction A of the base material;
acquiring a first actual coating length L based on the transverse coordinate of the detection position n Wherein, L n ＝Σ(y n+1 -y n )，y n+1 Transverse coordinate, y, representing the (n + 1) th coating position in the detection position n A transverse coordinate of an nth coating position in the detection positions is detected, and n is a natural number greater than or equal to 0;
step S220, obtaining a second actual coating length, including:
acquiring a transverse coordinate of the detection position along the transmission direction A of the base material;
acquiring a second actual coating length H based on the transverse coordinates of the detection position n Wherein H is n ＝Σ(h n+1 -h n )，h n+1 Transverse coordinate, h, representing the (n + 1) th coating position in the detection position n In order to detect the lateral coordinate of the nth coating position among the positions, n is a natural number equal to or greater than 0.
Here, "acquiring the first actual coating length" is performed in a case where the detection position belongs to the first coating region, and "acquiring the second actual coating length" is performed in a case where the detection position belongs to the second coating region.
The lateral coordinate is a coordinate of the detection position in the conveyance direction of the base material 1.
The method comprises the steps of obtaining a first actual coating length of a coated first coating area and a second actual coating length of a coated second coating area, and achieving the first actual coating length and the second actual coating length in an accumulation mode, continuously detecting transverse coordinates of the coated first coating area and the coated second coating area, and sequentially accumulating transverse coordinate differences between adjacent positions until the last transverse coordinate of the coated first coating area and the last transverse coordinate of the coated second coating area to obtain the first actual coating length and the second actual coating length, so that the actual coating length is detected more accurately, the coating lengths of the first coating area to be coated and the second coating area to be coated can be adjusted more accurately, and the coating quality is better.
As shown in fig. 5, in some embodiments, obtaining a first actual coating length of the first coating region along the driving direction a of the substrate and a second actual coating length of the second coating region along the driving direction a of the substrate according to the determination result includes:
step S230, acquiring a first actual coating length, including:
acquiring a coating initial transverse coordinate y of the detection position along the transmission direction A of the base material Starting from And acquiring a coating termination transverse coordinate y of the detection position along the transmission direction A of the base material Final (a Chinese character of 'gan') The first actual coating length L n ＝y Terminal -y Starting from ；
Step S240, acquiring a second actual coating length, including:
acquiring a coating initial transverse coordinate h of the detection position along the transmission direction A of the base material Starting point And acquiring a coating termination transverse coordinate h of the detection position along the driving direction A of the substrate Terminal Second actual coating length H n ＝h Terminal -h Starting point 。
Since the detection position is the first coating area or the second coating area, the detection position has a start position and an end position of the coating along the driving direction a of the substrate, and the difference between the start position and the end position of the coating at the detection position along the driving direction a of the substrate is the coating length at the detection position.
The first practical coating length is obtained by obtaining the difference value of the coating starting transverse coordinate and the coating ending transverse coordinate in the first coating area, the second practical coating length is obtained by obtaining the difference value of the coating starting transverse coordinate and the coating ending transverse coordinate in the second coating area, the obtaining mode is simple and convenient, the feedback times are few, and the detection efficiency is improved.
As shown in fig. 6, in some embodiments, determining whether the detection location belongs to the first coating region or the second coating region of the substrate 1 includes: judging whether the detection position belongs to a first coating area or a second coating area according to the coating thickness of the detection position;
the coating quality detection method further comprises the following steps:
step S400, acquiring a first actual coating thickness of the first coating area and a second actual coating thickness of the second coating area according to the judgment result;
step S500, adjusting the coating thickness of the first coating area to be coated according to the first actual coating thickness, and adjusting the coating thickness of the second coating area to be coated according to the second actual coating thickness, so as to control the coating thickness of the first coating area to be coated and the coating thickness of the second coating area to be coated within a preset range.
The step S500 of "controlling the coating thickness of the first coating region to be coated and the coating thickness of the second coating region to be coated within the preset ranges" means that the coating thickness of the first coating region to be coated and the coating thickness of the second coating region to be coated are controlled within the respective preset ranges, the preset range of the coating thickness of the first coating region and the preset range of the coating thickness of the second coating region do not overlap, and the minimum value of the preset range of the coating thickness of the first coating region is greater than the maximum value of the preset range of the coating thickness of the second coating region.
The "preset range" in step S300 and the "preset range" in step S500 are different concepts, and the coating length indicated by the "preset range" in step S300 and the coating thickness indicated by the "preset range" in step S500 may be measured in meters, and the coating thickness may be measured in micrometers.
The adjustment of the coating thickness of the first coating region to be coated and the adjustment of the coating thickness of the second coating region to be coated can be achieved by adjusting the coating flow rate of the coating head 100.
The method comprises the steps of obtaining a first actual coating thickness of a coated first coating area and a second actual coating thickness of a coated second coating area, comparing the first actual coating thickness with a preset coating thickness of the first coating area, if the first actual coating thickness does not meet the preset coating thickness of the first coating area, adjusting the coating length of the first coating area which is not coated yet, comparing the second actual coating thickness with the preset coating thickness of the second coating area, and if the second actual coating thickness does not meet the preset coating thickness of the second coating area, adjusting the coating thickness of the second coating area which is not coated yet, so that the coating thickness of the first coating area to be coated and the coating thickness of the second coating area to be coated are controlled within a preset range, and the coating thicknesses of the first coating area and the second coating area meet production requirements, and coating quality is improved.
With continued reference to fig. 6, in some embodiments, the coating quality detection method further includes:
step S600, acquiring a first actual coating surface density of the first coating area and a second actual coating surface density of the second coating area according to the judgment result;
and step S700, adjusting the coating surface density of the first coating area to be coated according to the first actual coating surface density, and adjusting the coating surface density of the second coating area to be coated according to the second actual coating surface density, so as to control the coating surface density of the first coating area to be coated and the coating surface density of the second coating area to be coated within a preset range.
The coating areal density is an index of the flatness of the reaction coating 2, the flatness of the first coating area and the flatness of the second coating area are different, and therefore, the areal density of the first coating area is different from the areal density of the second coating area, the preset range of the coating areal density of the first coating area and the preset range of the coating areal density of the second coating area do not overlap, and the minimum value of the preset range of the coating areal density of the first coating area is greater than the maximum value of the preset range of the coating areal density of the second coating area. The coating areal density may be measured in milligrams.
The phrase "controlling the coating areal density of the first coating region to be coated and the coating areal density of the second coating region to be coated within the preset ranges" in step S700 means that the coating areal density of the first coating region to be coated and the coating areal density of the second coating region to be coated are controlled within respective preset ranges, and the preset ranges of the coating areal density of the first coating region and the coating areal density of the second coating region may be the same or different.
Further, the "preset range" in step S300, the "preset range" in step S500, and the "preset range" in step S700 are different concepts, the coating length indicated by the "preset range" in step S300, the coating thickness indicated by the "preset range" in step S500, and the coating thickness indicated by the "preset range" in step S700.
Adjusting the coating areal density of the first coating area to be coated and adjusting the coating areal density of the second coating area to be coated can be achieved by adjusting the coating thickness of the coating head 100.
The method comprises the steps of obtaining a first actual coating surface density of a coated first coating area and a second actual coating surface density of a coated second coating area, comparing the first actual coating surface density with a preset coating surface density of the first coating area, if the first actual coating surface density does not meet the preset coating surface density of the first coating area, adjusting the coating surface density of the first coating area which is not coated yet, comparing the second actual coating surface density with the preset coating surface density of the second coating area, and if the second actual coating surface density does not meet the preset coating surface density of the second coating area, adjusting the coating surface density of the second coating area which is not coated yet, so that the coating surface density of the first coating area to be coated and the coating surface density of the second coating area to be coated are controlled within a preset range, so that the coating surface densities of the first coating area and the second coating area to meet production requirements, the coating flatness is guaranteed, and the coating quality is improved.
As shown in fig. 7, in some embodiments, the step S610 of obtaining a first actual coating areal density of the first coated region includes: acquiring the coating surface density of the detection position before the coating 2 of the detection position is dried and acquiring the coating surface density of the detection position after the coating 2 of the detection position is dried;
step S620, obtaining a second actual coating areal density of the second coating area, including: the coating areal density of the second coating region is obtained before the coating 2 at the inspection position is dried and the coating areal density of the inspection position is obtained after the coating 2 at the inspection position is dried.
In both step S610 and step S620, the coating surface density at the detection position before drying is detected, and then the coating surface density at the detection position after drying is detected.
By acquiring the surface density of the detection position before drying and the surface density of the detection position after drying, the coating surface density of the detection position can be checked and detected twice before and after drying, so that the surface density of the first coating area and the second coating area to be coated can be adjusted twice, and the coating quality is further improved. If the coating surface density before drying is only controlled, the coating surface density may become uneven after the drying process, and the coating requirements are not met; if the dried coating surface density is only controlled, a distance is reserved from the coating position to the drying position, so that the adjustment has hysteresis, the adjustment is not in time, and the controllable parameters are not in time to be adjusted. The surface density of the detection position can be detected before drying to judge whether the surface density is qualified or not in advance, primary adjustment can be carried out, secondary detection and correction are carried out after drying, secondary adjustment and closed loop correction are carried out, the coating surface densities of a first coating area to be coated and a second coating area to be coated are better controlled, and the purposes of coating surface density consistency of the first coating area and the coating surface density of the second coating area of the substrate 1 are achieved.
In some embodiments, the step S410 of obtaining a first actual coating thickness of the first coating region includes: acquiring the coating thickness of the detection position before the coating 2 of the detection position is dried and acquiring the coating thickness of the detection position after the coating 2 of the detection position is dried;
step S420, obtaining a second actual coating thickness of the second coating area, including: the coating thickness at the inspection position is acquired before the coating 2 at the inspection position is dried and the coating thickness at the inspection position is acquired after the coating 2 at the inspection position is dried.
Step S410 and step S420 are both to obtain the coating thickness of the detection position before drying, and then to obtain the coating thickness of the detection position after drying.
By acquiring the surface density of the detection position before drying and the coating thickness of the detection position after drying, the coating thickness of the detection position can be detected twice before and after drying, and the thickness of the first coating area and the second coating area to be coated can be adjusted twice, so that the coating quality is further improved. If the coating thickness before drying is only controlled, the coating thickness may become uneven after the drying process, and the coating requirement is not met; if only the coating thickness after drying is controlled, a distance is reserved from the coating position to the drying position, so that the adjustment has hysteresis, and the adjustment is not in time, so that the controllable parameters are not in time to be adjusted. Whether the coating thickness is qualified or not can be judged in advance by detecting the coating thickness at the detection position before drying, primary adjustment can be carried out, secondary detection and correction are carried out after drying, secondary adjustment and closed loop correction are carried out, the coating thicknesses of a first coating area to be coated and a second coating area to be coated are better controlled, and the purposes of coating thickness consistency of the first coating area and the coating thickness of the second coating area of the base material 1 are achieved.
As shown in fig. 7, an embodiment of the present application provides a method for detecting coating quality, which first determines whether a detection position belongs to a first coating area or a second coating area, and if the detection position belongs to the first coating area as a result of the determination, obtains a first actual coating length of the first coating area, and obtains a first actual coating length according to the first actual coating lengthThe length is adjusted to the coating length of the first coating area to be coated, so that the coating length of the first coating area to be coated is controlled within a preset range. The first actual coating length L may be obtained based on the lateral coordinates of the detected position n Wherein L is n ＝Σ(y n+1 -y n )，y n+1 Transverse coordinate, y, representing the (n + 1) th coating position in the detection position n N is a natural number equal to or greater than 0 for detecting the lateral coordinate of the nth coating position among the positions. The coating quality detection method further comprises the steps of obtaining a first actual coating thickness of the first coating area, and adjusting the coating thickness of the first coating area to be coated according to the first actual coating thickness so as to control the coating thickness of the first coating area to be coated within a preset range. Acquiring the first actual coating thickness includes detecting the coating thickness at the detection position before drying at the detection position and detecting the coating thickness at the detection position after drying at the detection position. The coating quality detection method further comprises the steps of obtaining a first actual coating surface density of the first coating area, and adjusting the coating surface density of the first coating area to be coated according to the first actual coating surface density so as to control the coating surface density of the first coating area to be coated within a preset range. Acquiring the first actual coating area density comprises detecting the coating area density of the detection position before drying at the detection position and detecting the coating area density of the detection position after drying at the detection position.
And if the detection position belongs to the second coating area, acquiring a second actual coating length of the second coating area, and adjusting the coating length of the second coating area to be coated according to the second actual coating length so as to control the coating length of the second coating area to be coated within a preset range. The second actual coating length H may be obtained based on the lateral coordinates of the detected position n Wherein H is n ＝Σ(h n+1 -h n )，h n+1 Transverse coordinate, h, representing the (n + 1) th coating position in the detection position n N is a natural number equal to or greater than 0 for detecting the lateral coordinate of the nth coating position among the positions. The coating quality detection method also comprises the steps of obtaining a second actual coating thickness of a second coating area according to the second actual coating thicknessThe coating thickness of the second coating area to be coated is adjusted so as to control the coating thickness of the second coating area to be coated within a preset range. Acquiring the second actual coating thickness includes detecting the coating thickness at the detection position before drying at the detection position and detecting the coating thickness at the detection position after drying at the detection position. The coating quality detection method further comprises the steps of obtaining the first actual coating surface density of the second coating area, and adjusting the coating surface density of the second coating area to be coated according to the second actual coating surface density so as to control the coating surface density of the second coating area to be coated within a preset range. Acquiring the second actual coating area density comprises detecting the coating area density of the detection position before drying at the detection position and detecting the coating area density of the detection position after drying at the detection position.
The embodiment of the present application further provides a coating quality detecting system 2000 (shown in fig. 9), where the coating quality detecting system 2000 includes a distinguishing and identifying device (not shown in the figure) and a control device (not shown in the figure); the area identification device is configured to judge whether the detection position belongs to a first coating area or a second coating area of the base material 1, and obtain a first actual coating length of the first coating area along the transmission direction A of the base material and a second actual coating length of the second coating area along the transmission direction A of the base material according to the judgment result, wherein the coating thickness of the first coating area is larger than that of the second coating area; the control device is configured to control the action of the coating device 1000 according to the first actual coating length and the second actual coating length so as to control the coating length of the first coating area to be coated and the coating length of the second coating area to be coated within a preset range.
The area recognition device feeds back the result of judging whether the detection position belongs to the first coating area or the second coating area and the actual coating length of the detection position to the control device, if the detection position belongs to the first coating area, the coating length of the coated detection position is the first actual coating length, the control device compares the first actual coating length with the preset range of the coating length of the first coating area, and if the first actual coating length does not belong to the preset range of the coating length of the first coating area, the control device controls the coating device 1000 to act so as to adjust the coating length of the first coating area to be coated. If the detection position belongs to the second coating area, the coating length of the coated detection position is a second actual coating length, the control device compares the second actual coating length with a preset range of the coating length of the second coating area, and if the second actual coating length does not belong to the preset range of the coating length of the second coating area, the control device controls the coating device 1000 to act so as to adjust the coating length of the second coating area to be coated. The region identifying means may be an encoder.
The control device controls the coating device 1000 to act according to the first actual coating length of the coated first coating area and the second actual coating length of the coated second coating area, so that the coating length of the first coating area to be coated and the coating length of the second coating area to be coated are controlled within a preset range, the coating lengths of the first coating area and the second coating area can meet production requirements, and the coating quality is improved.
In some embodiments, the coating quality detection system 2000 further comprises an areal density detection device 2100, the areal density detection device 2100 being configured to detect the actual coating areal density at the detection location.
The surface density detection device 2100 may be a laser scanning head, and detects the transverse surface density and the longitudinal surface density of the position by continuously scanning the surface, and feeds back a transverse surface density signal and a longitudinal surface density signal to the control device, and the control device determines whether the transverse surface density and the longitudinal surface density of the detection position belong to a preset range of the coating surface density of the first coating area or a preset range of the coating surface density of the second coating area, so as to perform closed-loop control on the coating device 1000, so that the coating surface density of the detection position meets the coating requirement.
As shown in fig. 8, the coating layer 2 is applied to a partial region in the width direction of the substrate 1, and has blank regions 1c to which the coating layer 2 is not applied on both sides in the width direction of the substrate 1, and the area density detection apparatus 2100 scans along a scanning locus B in fig. 8 to obtain a transverse area density, a longitudinal area density, and a blank region 1c area density, where the transverse coating area density = the transverse area density to the blank region 1c area density, and the longitudinal coating area density = the longitudinal area density to the blank region 1c area density. The transverse direction coincides with the drive direction a of the substrate and the longitudinal direction coincides with the width direction of the substrate 1.
The surface density detection device 2100 is configured to detect an actual coating surface density at the detection position, and feed back an actual surface density signal to the control device, so as to control the coating device 1000 to adjust the surface density of the first coating area to be coated and the coating surface density of the second coating area to be coated, so that the coating surface densities of the first coating area and the second coating area both meet production requirements, ensure coating flatness, and improve coating quality.
As shown in fig. 9, in some embodiments, the coating apparatus 1000 includes a drying mechanism 500 for drying the coating 2. Drying may cause inconsistency in the density of the coated surface.
In some embodiments, areal density detection apparatus 2100 includes a first detector 2110 and a second detector 2120; the first detector 2110 is configured to detect the coating areal density of the detection position before the coating 2 at the detection position is dried, and the second detector 2120 is configured to detect the coating areal density of the detection position after the coating 2 at the detection position is dried.
The first detector 2110 and the second detector 2120 may be both scanning heads, and the first detector 2110 is disposed upstream of the drying mechanism 500 and the second detector 2120 is disposed downstream of the drying mechanism 500.
The first detection piece 2110 scans and measures the detection position and feeds back a coating surface density signal of the detected detection position to the control device; the control device system analyzes the transverse surface density distribution and the longitudinal surface density distribution of the detection position before drying according to the coating surface density information before drying of the detection position fed back by the first detection piece 2110, makes corresponding judgment, and controls the coating device 1000 to perform closed-loop control on the transverse surface density and the longitudinal surface density, so that the coating surface density before drying meets the coating requirement.
After the coating 2 at the detection position passes through the drying mechanism 500, the second detection element 2120 scans and measures the coating surface density at the dried detection position, and feeds back the coating surface density data at the dried detection position to the control device; the control device analyzes the transverse surface density distribution and the longitudinal surface density distribution of the dried detection position according to the feedback data, corresponding judgment is made, the coating device 1000 performs closed-loop control on the transverse surface density and the longitudinal surface density, so that the coating surface density of the dried detection device meets the coating requirement, and in actual production, the coating surface density of the dried first coating area to be coated and the dried second coating area to be coated is finally adjusted to a preset range.
The first detector 2110 detects the density of the coated surface at the detection position before the coating 2 at the detection position is dried, the second detector 2120 detects the density of the coated surface at the detection position after the coating 2 at the detection position is dried, and the control device controls the operation of the coating device 1000 according to the signals of the surface densities detected by the first detector 2110 and the second detector 2120, so that the density of the coated surface of the substrate 1 can be adjusted twice, and the coating quality is further improved. If the coating surface density before drying is only controlled, the coating surface density may become uneven after the drying process, and the coating requirements are not met; if the coating surface density after drying is only controlled, a distance is reserved from the coating position to the drying position, so that the adjustment has hysteresis, the adjustment is not in time, and the controllable parameters are not in time to adjust. The surface density of the detection position can be detected before drying to judge whether the coating surface density is qualified or not in advance, primary adjustment can be carried out, secondary detection and correction are carried out after drying, secondary adjustment and closed loop correction are carried out, the coating surface densities of a first coating area to be coated and a second coating area to be coated are better controlled, and the purposes of coating surface density consistency of the first coating area and the coating surface density of the second coating area of the substrate 1 are achieved.
In some embodiments, the coating quality detection system 2000 further comprises a thickness detection device (not shown in the figures) configured to detect the actual coating thickness at the detection location.
The thickness detection device can comprise a thickness sensor, the coating thickness of the detection position is continuously detected, and the coating thickness data of the detection position is fed back to the control device, the control device judges whether the coating thickness of the detection position belongs to the preset range of the coating thickness of the first coating area or the preset range of the coating thickness of the second coating area, so that closed-loop control is performed on the coating device 1000, the coating thicknesses of the first coating area and the second coating area can meet the production coating requirement, and the coating quality is improved.
The thickness detection device may be provided in correspondence with the areal density detection device 2100. In an embodiment in which it is determined by the coating thickness whether the detection means belongs to the first coating region or the second coating region, the thickness detection means may function as region identification means.
In some embodiments, the thickness detection device includes a third detection member and a fourth detection member; the third detecting member is configured to detect the coating thickness at the detection position before the coating 2 at the detection position is dried, and the fourth detecting member is configured to detect the coating surface thickness at the detection position after the coating 2 at the detection position is dried.
The third detection piece and the fourth detection piece can be thickness sensors, the third detection piece carries out scanning measurement on the detection position and feeds back a coating thickness signal of the detected detection position to the control device; the control device system analyzes the coating thickness of the detection position before drying according to the coating thickness information before drying of the detection position fed back by the third detection piece, makes corresponding judgment, and controls the coating device 1000 to adjust the first coating area to be coated and the second coating area to be coated of the coating device 1000, so that the coating thickness before drying meets the coating requirement.
The third sensing member may be disposed at the same position as the first sensing member 2110, and the fourth sensing member may be disposed at the same position as the second sensing member 2120.
After the coating 2 at the detection position passes through the drying mechanism 500, the fourth detection part scans the detection position to measure the coating thickness of the dried detection position, and feeds back the coating thickness data of the dried detection position to the control device; the control device analyzes the coating thickness of the dried detection position according to the feedback data, and makes a corresponding judgment, the coating device 1000 performs closed-loop adjustment on the coating thicknesses of the first coating area to be coated and the second coating area to be coated, so that the coating thicknesses of the first coating area to be coated and the second coating area to be coated meet the coating requirements, and in actual production, the coating thicknesses after drying of the first coating area to be coated and the second coating area to be coated are adjusted to a preset range.
The third detection piece is used for detecting the coating thickness of the detection position before the coating 2 of the detection position is dried, the fourth detection piece is used for detecting the coating thickness of the detection position after the coating 2 of the detection position is dried, and the control device controls the coating device 1000 to act according to the coating thickness signals detected by the third detection piece and the fourth detection piece, so that the coating thickness of the base material 1 can be adjusted twice, and the coating quality is further improved. If the coating thickness before drying is only controlled, the coating thickness may become uneven after the drying process, and the coating requirement is not met; if only the coating thickness after drying is controlled, a distance is reserved from the coating position to the drying position, so that the adjustment has hysteresis, and the adjustment is not in time, so that the controllable parameters are not in time to be adjusted. Whether the coating surface density is qualified or not can be judged in advance by detecting the coating thickness of the detection position before drying, primary adjustment can be carried out, secondary detection and correction are carried out after drying, secondary adjustment and closed loop correction are carried out, the coating thicknesses of a first coating area to be coated and a second coating area to be coated are better controlled, and the purposes of coating thickness consistency of the first coating area and the second coating area of the substrate 1 are achieved.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (12)
1. A coating quality detection method, characterized by comprising:
judging whether the detection position belongs to a first coating area or a second coating area of the base material, wherein the coating thickness of the first coating area is larger than that of the second coating area;
acquiring a first actual coating length of the first coating area along the transmission direction of the base material and a second actual coating length of the second coating area along the transmission direction of the base material according to a judgment result;
and adjusting the coating length of a first coating area to be coated according to the first actual coating length, and adjusting the coating length of a second coating area to be coated according to the second actual coating length, so as to control the coating length of the first coating area to be coated and the coating length of the second coating area to be coated within a preset range.
2. The coating quality detection method according to claim 1, wherein the obtaining of a first actual coating length of the first coating region in the driving direction of the substrate and a second actual coating length of the second coating region in the driving direction of the substrate according to the determination result comprises: obtaining the first actual coating length, including:
acquiring a transverse coordinate of the detection position along the transmission direction of the base material;
acquiring the first actual coating length L based on the transverse coordinate of the detection position n Wherein L is n ＝Σ(y n+1 -y n )，y n+1 Transverse coordinate, y, representing the (n + 1) th coating position of the detection positions n Is a transverse coordinate of an nth coating position in the detection positions, wherein n is a natural number which is more than or equal to 0;
obtaining the second actual coating length comprising:
acquiring a transverse coordinate of the detection position along the transmission direction of the base material;
acquiring the second actual coating length H based on the transverse coordinate of the detection position n Wherein H is n ＝Σ(h n+1 -h n )，h n+1 Transverse coordinate representing the n +1 th coating position among the detection positions, h n For the n-th one of the detection positionsN is a natural number of 0 or more in the lateral coordinate of the coating position.
3. The coating quality detection method according to claim 1, wherein the obtaining of a first actual coating length of the first coating region in the driving direction of the substrate and a second actual coating length of the second coating region in the driving direction of the substrate according to the determination result comprises:
obtaining the first actual coating length, including:
acquiring a coating starting transverse coordinate y of the detection position along the transmission direction of the base material Starting from And acquiring a coating termination transverse coordinate y of the detection position along the driving direction of the substrate Final (a Chinese character of 'gan') The first actual coating length L n ＝y Final (a Chinese character of 'gan') -y Starting from ；
Obtaining the second actual coating length, including:
acquiring a coating start transverse coordinate h of the detection position along the transmission direction of the base material Starting point And acquiring a coating termination transverse coordinate h of the detection position along the transmission direction of the base material Terminal The second actual coating length H n ＝h Final (a Chinese character of 'gan') -h Starting from 。
4. The coating quality inspection method according to claim 1, wherein the judging whether the inspection position belongs to the first coating region or the second coating region of the substrate includes: judging whether the detection position belongs to a first coating area or a second coating area according to the coating thickness of the detection position;
the coating quality detection method further comprises the following steps:
acquiring a first actual coating thickness of the first coating area and a second actual coating thickness of the second coating area according to a judgment result;
and adjusting the coating thickness of a first coating area to be coated according to the first actual coating thickness, and adjusting the coating thickness of a second coating area to be coated according to the second actual coating thickness, so as to control the coating thickness of the first coating area to be coated and the coating thickness of the second coating area to be coated within a preset range.
5. The coating quality inspection method according to claim 4, further comprising:
acquiring a first actual coating surface density of the first coating area and a second actual coating surface density of the second coating area according to a judgment result;
adjusting the coating surface density of a first coating area to be coated according to the first actual coating surface density, and adjusting the coating surface density of a second coating area to be coated according to the second actual coating surface density, so as to control the coating surface density of the first coating area to be coated and the coating surface density of the second coating area to be coated within preset ranges.
6. The coating quality detection method according to claim 5, wherein obtaining the first actual coating areal density of the first coating region comprises:
acquiring the coating surface density of the detection position before the coating at the detection position is dried and acquiring the coating surface density of the detection position after the coating at the detection position is dried;
obtaining a second actual coating areal density of the second coating region, comprising:
and acquiring the coating surface density of the detection position before drying the coating at the detection position and acquiring the coating surface density of the detection position after drying the coating at the detection position.
7. The coating quality detection method according to any one of claims 4 to 6, wherein obtaining the first actual coating thickness of the first coating region comprises:
acquiring the coating thickness of the detection position before the coating of the detection position is dried and acquiring the coating thickness of the detection position after the coating of the detection position is dried;
obtaining a second actual coating thickness of the second coated region, comprising:
and acquiring the coating thickness of the detection position before the coating at the detection position is dried, and acquiring the coating thickness of the detection position after the coating at the detection position is dried.
8. A coating quality detection system, comprising:
the area identification device is configured to judge whether the detection position belongs to a first coating area or a second coating area of the base material, and acquire a first actual coating length of the first coating area along the transmission direction of the base material and a second actual coating length of the second coating area along the transmission direction of the base material according to the judgment result, wherein the coating thickness of the first coating area is larger than that of the second coating area;
a control device configured to control the action of the coating device according to the first actual coating length and the second actual coating length so as to control the coating length of the first coating area to be coated and the coating length of the second coating area to be coated within a preset range.
9. The coating quality detection system of claim 8, further comprising an areal density detection device configured to detect an actual coating areal density at the detection location.
10. The coating quality inspection system of claim 9, wherein the areal density detection device comprises a first detection member and a second detection member;
the first detecting member is configured to detect a coating areal density of the detection position before drying of the coating at the detection position, and the second detecting member is configured to detect a coating areal density of the detection position after drying of the coating at the detection position.
11. The coating quality detection system of any one of claims 8-10, further comprising a thickness detection device configured to detect an actual coating thickness at the detection location.
12. The coating quality inspection system of claim 11, wherein the thickness detection device comprises a third detection member and a fourth detection member;
the third detecting element is configured to detect the coating thickness of the detection position before the coating at the detection position is dried, and the fourth detecting element is configured to detect the coating thickness of the detection position after the coating at the detection position is dried.
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| CN202111015359.2A CN115722418A (en) | 2021-08-31 | 2021-08-31 | Coating quality detection method and system |
| PCT/CN2022/097940 WO2023029640A1 (en) | 2021-08-31 | 2022-06-09 | Coating quality test method and system |
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| CN116804611B (en) * | 2023-08-22 | 2024-01-26 | 宁德时代新能源科技股份有限公司 | Automatic evaluation method and system for detection equipment |
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