Surface coating layer bonding force detection system, device and method, and coating apparatus

Abstract

The present application relates to a surface coating layer bonding force detection system, device and method, and a coating apparatus. The surface coating layer bonding force detection system comprises a cutting mechanism, a first winding mechanism, and a surface coating layer bonding force detection device. The cutting mechanism is configured to cut a coated member to be tested, so as to obtain a finished coated member and a test coated member. The first winding mechanism is configured to wind the finished coated member. The surface coating layer bonding force detection device comprises a second winding mechanism, a stripping mechanism and a test mechanism, wherein the second winding mechanism is configured to wind the test coated member, and the stripping mechanism is configured to guide the test coated member to travel to the second winding mechanism, and can execute a coating layer stripping operation on the test coated member passing therethrough; and the test mechanism is located between the stripping mechanism and the second winding mechanism, and is configured to obtain a coating layer stripping result that represents whether the coating layer bonding force of the test coated member is abnormal. The test result in the present application can represent the actual condition of a product, and the test reliability is high.

Description

Surface coating layer bonding strength detection system, device, method and coating equipment

[0001] Cross-references

[0002] This application refers to Chinese Patent Application No. 2023110176451 filed on August 14, 2023, entitled “Surface Coating Layer Adhesion Detection System, Device, Method and Coating Equipment,” which is incorporated herein by reference in its entirety. Technical Field

[0003] The present application relates to the technical field of coating layer adhesion testing, and in particular to a surface coating layer adhesion testing system, device, method, and coating equipment. Background Art

[0004] The current collector is one of the indispensable electrode materials for lithium-ion batteries, and has the important functions of carrying active substances and collecting microcurrents. Composite current collectors integrate the characteristics of lightweight, thin, and highly safe current collectors and have been widely studied in recent years. Generally, composite current collectors are prepared by forming a metal coating layer on a polymer substrate. For composite current collectors, it is necessary to conduct qualitative tests on the bonding strength between its metal coating layer and the substrate. Most current testing equipment adopts local sampling testing, and the test results cannot cover the entire product, and the reliability of the test results is low.

[0005] Summary of the Invention

[0006] In view of the above problems, the present application provides a surface coating layer bonding strength detection system, device, method, coating equipment and battery production system, which can obtain coating layer bonding strength detection results representing most areas of the coated parts with higher detection reliability.

[0007] In a first aspect, the present application provides a surface coating layer bonding strength detection system, comprising a slitting mechanism, a first winding mechanism and a surface coating layer bonding strength detection device. The slitting mechanism is used to slit the coated parts to be tested to obtain finished coated parts and test coated parts. The first winding mechanism is used to wind up the finished coated parts. The surface coating layer bonding strength detection device comprises a second winding mechanism, a stripping mechanism and a detection mechanism, the second winding mechanism is used to wind up the test coated parts, the stripping mechanism is used to guide the test coated parts to the second winding mechanism, and is capable of performing a coating layer stripping operation on the test coated parts passing through itself, and the detection mechanism is used to obtain a coating layer stripping result that characterizes whether the coating layer bonding strength of the test coated parts is abnormal.

[0008] In the technical solution of the embodiment of the present application, when testing the coating adhesion of a coated part to be tested, a slitting mechanism is used to separate the coated part to be tested into a finished coated part and a test coated part. During the slitting process, a first reeling mechanism is used to reel in the finished coated part, and a second reeling mechanism is used to reel in the test coated part. While the test coated part is being fed to the second reeling mechanism, a stripping mechanism is used to strip the coating from the test coated part, and a testing mechanism is used to obtain the coating stripping result for the test coated part.

[0009] Since the test coated parts and the finished coated parts are cut from the same coated part to be tested, the test results of the test coated parts are suitable for the finished coated parts. Moreover, the test coated parts and the finished coated parts are continuously conveyed to the first winding mechanism and the second winding mechanism respectively. The stripping mechanism can test multiple parts of the test coated parts. The test range can basically cover all the test coated parts, and then the coating stripping results of most areas of the test coated parts can be obtained. This is equivalent to achieving the surface coating layer bonding strength test of most areas of the finished coated parts. Compared with the existing sampling test, the technical solution provided by the embodiment of the present application can basically achieve the surface coating layer bonding strength test of the coated parts to be tested at various locations along their length. The test covers a wide range, the test results can better represent the actual situation of the product, and the test reliability is higher.

[0010] In some embodiments, the surface coating layer adhesion detection device further includes a controller and a marking mechanism, wherein the controller is in communication with the marking mechanism and the detection mechanism, and the controller is configured to control the marking mechanism to perform a marking operation on the finished coated part based on the coating layer peeling result. In this way, the surface coating layer adhesion detection system can also mark the corresponding position on the finished coated part when the coating layer adhesion does not meet the requirements, so as to facilitate the subsequent identification of the portion of the finished coated part with unqualified coating layer adhesion, and facilitate relevant personnel to remove the portion with unqualified coating layer adhesion. This can not only reduce the use of unqualified products and cause product quality problems, but also improve the utilization rate of the finished coated parts and reduce waste.

[0011] In some embodiments, the stripping mechanism includes a first guide roller pair and a stripping roller pair, the first guide roller pair and the stripping roller pair are arranged on the tape path of the test coated part, and the stripping roller pair is located between the first guide roller pair and the second winding mechanism. The roller surface linear speed of the first guide roller pair is configured to be equal to the roller surface linear speed of the first winding mechanism, and the roller surface linear speed of the stripping roller pair is configured to be different from the roller surface linear speed of the first guide roller pair. At this time, the first guide roller pair conveys the test coated part to the second winding mechanism, and at the same time, the stripping roller pair is used to continuously perform the coating stripping operation on the test coated part. The coating stripping effect is good, the structure is simple, and the cost is low. In addition, the detection mechanism can continuously obtain the coating stripping results, so that the detection results cover a wider range of products and the detection reliability is higher.

[0012] In some embodiments, the stripping roller pair includes a stretching roller pair, the linear velocity of which is configured to be greater than the linear velocity of the first guide roller pair. In this case, the stretching roller pair exerts a tensile force on the coating layer of the test coated part, pulling the coating layer away from the substrate layer. This can be accomplished by properly controlling the linear velocity of the stretching roller pair, resulting in a simple structure and easy adjustment of the stripping force.

[0013] In some embodiments, the linear velocity increase rate δ1 of the stretching roller pair relative to the first guide roller pair and the elongation at break δ2 of the substrate layer of the test coated article satisfy the following conditions: 20% ≤ δ1 / δ2 ≤ 90%. When δ1 / δ2 is within this range, the probability of the substrate layer being broken is reduced while also applying a greater tensile force to the coating layer, allowing a coating layer that does not meet the required bonding strength to be successfully broken.

[0014] In some embodiments, the stripping roller pair includes a friction roller pair, and the friction roller pair is located between the stretching roller pair and the second winding mechanism along the tape path of the test coated part. The roller surface linear speed of the friction roller pair is configured to be different from the roller surface linear speed of the stretching roller pair, and the roller surface linear speed of the second winding mechanism is configured to be equal to the roller surface linear speed of the stretching roller pair. Since the roller surface linear speed of the stretching roller pair is equal to the roller surface linear speed of the second winding mechanism, while the roller surface linear speed of the friction roller pair is different from the roller surface linear speed of the stretching roller pair, after the test coated part is pulled and peeled by the stretching roller pair, when it passes through the friction roller pair, the peeled coating layer is more easily peeled off from the substrate due to the friction of the friction roller pair. In this way, when the controller obtains the coating layer peeling result based on the detection mechanism, the detection accuracy of the detection mechanism is higher.

[0015] In some embodiments, the surface coating layer bonding strength detection device further includes a powder collection mechanism located between the stretching roller pair and the friction roller pair. The powder collection mechanism collects coating layer powder peeled from the substrate layer, thereby reducing environmental pollution caused by the peeled coating layer.

[0016] In some embodiments, the stripping mechanism further includes a second guide roller pair, the second guide roller pair being located on the tape path of the test coated part, and the first guide roller pair being located between the second guide roller pair and the stripping roller pair. The roller surface linear velocity of the second guide roller pair is configured to be the same as the roller surface linear velocity of the first guide roller pair. In this case, the first area can provide a tape path for the test coated part at the same speed as the finished coated part. The first area can buffer a certain length of the test coated part, so that when the test coated part passes through the first area, its coating layer is not affected by the stripping roller pair, thereby acting as a buffer, preventing the force of the stripping roller pair from being transmitted to the slitting mechanism and affecting the tape path and slitting of the test coated part.

[0017] In some embodiments, the detection mechanism includes a light emitter and a light collector, which are arranged in a matching configuration on opposite sides of the test coated part. In this case, the light emitter and light collector work together to detect coating peeling results, providing reliable results and low cost.

[0018] In some embodiments, the detection mechanism is disposed between the stripping mechanism and the second winding mechanism. In other words, the detection mechanism can directly obtain the coating stripping result based on the test coated part subjected to the coating stripping operation by the stripping roller, thereby simplifying the overall structure of the surface coating adhesion detection device.

[0019] In a second aspect, embodiments of the present application provide a surface coating adhesion testing device for testing coated parts. The device includes a second reeling mechanism, a stripping mechanism, and a testing mechanism. The second reeling mechanism is used to reel in the coated part being tested. The stripping mechanism is used to guide the coated part being tested to the second reeling mechanism and is capable of stripping the coating from any part passing through it. The testing mechanism is located between the stripping mechanism and the second reeling mechanism and is used to obtain a coating stripping result indicating whether the coating adhesion of the coated part being tested is abnormal.

[0020] This surface coating adhesion testing device is used to test the adhesion of the coating on a test coated part. The test coated part is continuously fed under the guidance of a second winding mechanism and a stripping mechanism. The stripping mechanism can perform coating stripping operations on multiple locations of the test coated part and cooperate with the testing mechanism to obtain coating stripping results at multiple locations along the feeding direction. This makes it suitable for testing the adhesion of the surface coating on longer test coated parts.

[0021] In a third aspect, the present invention provides a method for detecting the bonding strength of a surface coating layer, comprising:

[0022] The slitting mechanism is called to slit the coated parts to be tested on the conveyor belt to obtain finished coated parts and test coated parts;

[0023] The first winding mechanism is called to wind up the finished coated part, and the second winding mechanism is called to wind up the test coated part;

[0024] When the test coated part is conveyed to the second winding mechanism, the stripping mechanism is called to perform a coating stripping operation on the test coated part, and the detection mechanism is called to obtain a coating stripping result indicating whether the coating bonding strength of the test coated part is abnormal.

[0025] This surface coating adhesion testing method uses a stripping mechanism to perform coating stripping operations on multiple locations of a test coated part. The testing mechanism can then obtain test results for multiple locations on the test coated part. Therefore, the test results are applicable to finished coated parts, effectively enabling surface coating adhesion testing across most areas of the finished coated part. Compared to existing spot-checking methods, this method helps expand the testing range and improve the reliability of testing for tested coated parts.

[0026] In some embodiments, the surface coating layer bonding strength detection method further comprises:

[0027] According to the coating layer stripping result, the marking mechanism is called to mark the finished coated part during the process of the finished coated part being conveyed to the first winding mechanism.

[0028] At this time, the surface coating adhesion detection system can also mark the finished coated parts according to the coating adhesion results, so as to facilitate the subsequent identification of the parts with unqualified coating adhesion in the finished coated parts, and facilitate relevant personnel to cut off the parts with unqualified coating adhesion. This can not only reduce the use of unqualified products and cause product quality problems, but also improve the utilization rate of finished coated parts and reduce waste.

[0029] In a fourth aspect, the present application provides a coating device comprising the surface coating layer adhesion detection system of the above-described embodiment. The coating device further comprises a coating mechanism and an unwinding mechanism, both of which are located on the substrate's tape path. The unwinding mechanism is used to unwind the substrate, and the coating mechanism is used to perform a coating operation on the substrate surface to obtain a coated part to be inspected.

[0030] In a fifth aspect, the present application provides a battery production system, including the coating equipment in the above embodiment.

[0031] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiment below. The accompanying drawings are for illustration purposes only and are not to be considered as limiting the present application. The same reference numerals are used throughout the drawings to represent the same components. In the drawings:

[0033] FIG1 is a schematic structural diagram of a coating component to be inspected according to one or more embodiments;

[0034] FIG2 is a schematic diagram of a surface coating layer bonding force detection system according to one or more embodiments;

[0035] FIG3 is a schematic diagram of the composition of a surface coating layer bonding force detection device according to one or more embodiments;

[0036] FIG4 is a schematic flow chart of a method for detecting the bonding strength of a surface coating layer according to one or more embodiments;

[0037] FIG5 is a schematic flow chart of a method for detecting the bonding strength of a surface coating layer according to another one or more embodiments;

[0038] FIG6 is a schematic diagram illustrating the composition of a coating device according to one or more embodiments.

[0039] The figure numbers in the specific implementation manner are as follows: 1000, coating equipment; 100, surface coating layer bonding force detection system; 10, slitting mechanism; 20, first winding mechanism; 30, surface coating layer bonding force detection device; 31, second winding mechanism; 32, peeling mechanism; 32a, first guide pressure roller pair; 32b, second guide pressure roller pair; 32c, peeling pressure roller pair; c1, stretching pressure roller pair; c2, friction pressure roller pair; 33, detection mechanism; 33d, light emitter; 33e, light collector; 34, marking mechanism; 35, powder collecting mechanism; D0, substrate; D1, coating part to be inspected; 01, coating layer; 02, substrate layer; D11, finished coating part; D12, test coating part; Q1, first area; Q2, second area; Q3, third area; 40, coating part unwinding roller; 200, unwinding mechanism; 300, coating mechanism. DETAILED DESCRIPTION

[0040] The following embodiments of the technical solution of the present application will be described in detail with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application and are therefore only examples and are not intended to limit the scope of protection of the present application.

[0041] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned figure descriptions are intended to cover non-exclusive inclusions.

[0042] In the description of the embodiments of this application, the use of technical terms such as "first" and "second" is solely for distinguishing different objects and should not be understood as indicating or implying relative importance or implicitly indicating the quantity, specific order, or primary and secondary relationship of the technical features indicated. In the description of the embodiments of this application, the meaning of "plurality" is more than two, unless otherwise specifically defined.

[0043] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0044] In the description of the embodiments of this application, if the term "and / or" appears, it is only a description of the association relationship of the associated objects, indicating that there can be three relationships. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. In addition, if it appears, the character " / " in this article generally indicates that the associated objects before and after are one of

[0045] "Or" relationship.

[0046] In the description of the embodiments of the present application, if it appears, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0047] In the description of the embodiments of the present application, if any, technical terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", and "circumferential" indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they should not be understood as limitations on the embodiments of the present application.

[0048] In the description of the embodiments of the present application, unless otherwise expressly specified or limited, technical terms such as "installed," "connected," "connected," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; internal connections between two components or interactions between two components. Those skilled in the art can understand the specific meanings of the above terms in the embodiments of the present application based on specific circumstances.

[0049] The preparation of lithium battery pole pieces requires the use of current collectors, which are used to coat active materials, collect and output the current generated by the active materials, and input external current (such as the electrode terminals of battery cells) to the active materials. Therefore, the current collector is usually required to have good electrical conductivity, good electrochemical stability, and high mechanical strength. Copper foil and aluminum foil are widely used as current collectors for pole pieces due to factors such as easy processing, mechanical strength and cost. However, pure metal current collectors such as copper foil / aluminum foil are heavy and are not conducive to achieving lightweight batteries. Composite current collectors integrate the characteristics of lightweight and high-safety current collectors and have been widely studied in recent years. Generally, composite current collectors are prepared by forming a metal coating layer on a polymer substrate.

[0050] For products with a coating layer formed on a substrate, it is usually necessary to test the adhesion between the coating layer and the substrate to ensure reliable product quality. Currently, most coating adhesion test equipment for the adhesion between the coating layer and the substrate adopts local sampling testing (that is, a part of the product to be tested is used as a sample for testing). The test results can only guarantee the local sample and cannot cover the entire area of ​​the product. If the test results of the local sample are used as the test results of the entire product, it is easy to be inconsistent with the actual situation of the product, and the test results are less reliable.

[0051] Based on this, and to improve the reliability of the test results for the adhesion of a product coating layer, embodiments of the present application design a surface coating adhesion test system for detecting whether the adhesion between the coating layer and the substrate is abnormal. In some examples, the coated part to be tested is cut into finished coated parts and test coated parts. The finished coated parts and the test coated parts are reeled onto different reeling mechanisms. While the test coated part is being fed to the reeling mechanism, a coating stripping operation is performed on the test coated part, and the coating stripping result is obtained. The coating stripping result can be used to determine whether the adhesion between the coating layer and the substrate is abnormal.

[0052] At this time, the coating layer peeling result can be used to determine whether the coating layer bonding strength of the test coated part is abnormal. Since the test coated part and the finished coated part come from the same coated part to be tested, the test result of the test coated part is adapted to the coating layer bonding strength of the finished coated part, and can reflect the coating layer bonding strength of the finished coated part at various locations along its tape running direction. The test results obtained in this way can basically cover the entire area of ​​the finished coated part, and the test results can better represent the actual situation of the product, and the test reliability is higher.

[0053] The coated parts to be inspected, as described in the embodiments of this application, are strip-shaped structures formed by applying a coating layer to a substrate. The coating layer can be applied to the substrate by, but is not limited to, electroplating, hot-dip plating, spraying, chemical plating, vapor deposition, or coating. Figure 1 is a schematic diagram of the structure of a coated part to be inspected, according to one or more embodiments.

[0054] Referring to Figure 1, a coating layer 01 is applied to at least one side of the substrate layer 02 of the coating component D1 to be inspected, along its thickness. The coating layer 01 can be, but is not limited to, a metal layer, a positive electrode active material layer, or a negative electrode active material layer. The substrate layer 02 can be, but is not limited to, a polymer material layer or a metal layer. The metal layer can be, but is not limited to, a copper metal layer or an aluminum metal layer. The polymer material layer can be, but is not limited to, one or more of polypropylene, polyester, and polyethylene. In one embodiment, the coating component D1 to be inspected is formed by combining a high polymer material layer and a metal layer to form a composite current collector, which can be used in the preparation of electrode sheets.

[0055] The surface coating layer bonding force detection system mentioned in the embodiment of the present application is used to detect whether the bonding force of the coating layer on the coated part to be inspected is abnormal. The coating equipment disclosed in the embodiment of the present application includes the surface coating layer bonding force detection system, the coating equipment and the unwinding mechanism. Among them, the unwinding mechanism is used to unwind the substrate, and the coating equipment is used to coat the surface of the substrate with a coating layer during the tape-feeding process of the substrate to obtain the coated part to be inspected. Then, the surface coating layer bonding force detection system is used to cut, detect the bonding force of the coating layer, and rewind the coated part to be inspected. When the coating layer peeling test result of the coated part shows that the bonding force of the coating layer is good, the finished coated part obtained is a good product and can be used for subsequent production. Among them, the coating mechanism can be, but is not limited to, an evaporation mechanism, a sputtering mechanism, etc., and those skilled in the art can make a conventional selection.

[0056] The battery production system mentioned in the embodiments of the present application includes the coating equipment mentioned in the embodiments of the present application, which can be used for the production of products with a coating layer structure such as composite current collectors and pole pieces.

[0057] The surface coating layer bonding strength detection system 100 provided in the embodiment of the present application is described in detail below.

[0058] FIG2 is a schematic diagram illustrating components of a surface coating layer adhesion detection system 100 according to one or more embodiments.

[0059] According to one or more embodiments of the present application, please refer to FIG2 . The surface coating layer bonding strength detection system 100 provided in the embodiment of the present application includes a slitting mechanism 10, a first winding mechanism 20, and a surface coating layer bonding strength detection device 30. The slitting mechanism 10 is used to slit the coating part D1 to be tested to obtain a finished coating part D11 and a test coating part D12. The first winding mechanism 20 is used to wind up the finished coating part D11. The surface coating layer bonding strength detection device 30 includes a second winding mechanism 31, a stripping mechanism 32, and a detection mechanism 33. The second winding mechanism 31 is used to wind up the test coating part D12. The stripping mechanism 32 is used to guide the test coating part D12 to the second winding mechanism 31 and can perform a coating layer stripping operation on the test coating part D12 passing through it. The detection mechanism 33 is used to obtain a coating layer stripping result indicating whether the coating layer bonding strength of the test coating part D12 is abnormal.

[0060] The coated part D1 to be inspected is typically in the form of a strip, with its length being greater than its width. During the inspection process, the coated part D1 to be inspected is conveyed to the slitting mechanism 10. In some cases, the coated part D1 to be inspected may be in the form of a roll, unwound by an unwinding device, and conveyed to the slitting mechanism 10. In other cases, the coated part D1 to be inspected may be conveyed to the slitting mechanism 10 during the processing and forming process. The conveying of the coated part D1 to be inspected may be achieved by guiding the roll using a plurality of rollers.

[0061] The slitting mechanism 10 is used to cut the coated part D1 to be inspected along its length (the same as the direction of the tape running of the coated part D1 to be inspected), thereby dividing the coated part D1 to be inspected into a finished coated part D11 and a test coated part D12, which are arranged adjacent to each other in its width direction. The test coated part D12 is the portion of the coated part used for the coating layer adhesion test, and the finished coated part D11 is the portion of the coated part that can be used as a finished product. Since the finished coated part D11 and the test coated part D12 are derived from the same coated part D1 to be inspected, the test results of the test coated part D12 are applicable to the finished coated part D11, and the coating layer adhesion of the finished coated part D11 can be determined based on the test results of the test coated part D12.

[0062] Since the test coated part D12 cannot be reused after testing, it constitutes test loss of the tested coated part D1. To improve the utilization rate of the tested coated part D1, the width of the test coated part D12 is typically smaller than that of the finished coated part D11. In one embodiment, the width of the test coated part D12 is selected to be 1 cm to 2 cm, such as 1.2 cm, 1.5 cm, or 1.8 cm. In this case, the test coated part D12 has a certain width that meets the required width for testing, and the loss of the tested coated part D1 is minimized.

[0063] The specific configuration of the slitting mechanism 10 can be varied and can be selected from a variety of conventional options. Typically, the slitting mechanism 10 includes a cutter. The cutter can remain stationary, cutting the coated article D1 as it passes through it. The cutter can also be designed to be rotatable, capable of rotating parallel to the width of the coated article D1, cutting the article D1 during this rotation. Of course, the slitting mechanism 10 can also include a drive mechanism to rotate the cutter.

[0064] In some cases, the slitting mechanism 10 may include a single cutter, which is used to separate the inspected coated article D1 into a finished coated article D11 and a test coated article D12. In other cases, the slitting mechanism 10 may include multiple cutters, which are used to separate the inspected coated article D1 into at least one finished coated article D11 and at least one test coated article D12.

[0065] For example, in some cases, there are two cutters, which are arranged at intervals along the width direction of the coated part D1 to be inspected. The two cutters divide the coated part D1 to be inspected into two test coated parts D12 located at both ends and a finished coated part D11 located in the middle. At this time, the inspection results of the two test coated parts D12 can be used to reflect the coating layer bonding strength of the finished coated part D11, which can effectively test whether the coating layer bonding strength distribution of the coated part D1 to be inspected is uniform, and the test structure is more accurate and reliable.

[0066] The first reel 20 and the second reel 31 are used to reel in the finished coated part D11 and the test coated part D12, respectively. It is understood that the first reel 20 reels the intact finished coated part D11, while the second reel 31 reels the test coated part D12 after the coating layer has been stripped. The first and second reel 20 and 31 typically include reel rollers and a power mechanism to drive the reel rollers. The specific structures of the first and second reel 20 and 31 can be selected from conventional options and are not detailed here.

[0067] The peeling mechanism 32 is positioned along the tape path of the test coated part D12 and is capable of guiding the test coated part D12 toward the second winding mechanism 31. While guiding the test coated part D12 along the tape path, the peeling mechanism 32 can also perform a coating stripping operation on the test coated part D12. The coating stripping operation is an operation capable of stripping the coating layer 01 from the substrate layer 02. In some examples, this involves stripping a coating layer 01 with abnormal bonding strength from the substrate layer 02. After the coating stripping operation is performed, the coating layer 01 may remain on the substrate layer 02 with essentially no bonding to it, or the coating layer 01 may directly fall off the substrate layer 02. It is understood that the peeling force applied by the peeling mechanism 32 to the coating layer 01 is designed. If the coating layer 01 peels or falls off from the substrate layer 02 to a significant extent under the designed peeling force, it indicates that the bonding strength of the coating layer 01 does not meet the target requirement, i.e., the bonding strength of the coating layer 01 is insufficient. On the contrary, under the designed peeling force, if the coating layer 01 peels off or falls off from the substrate layer 02 to a small extent or even does not peel off or fall off, it means that the bonding force of the coating layer 01 meets the target requirement, that is, the bonding force of the coating layer 01 is very good.

[0068] The detection mechanism 33 is used to obtain the coating peeling result of the test coated part D12 passing through it. The coating peeling result is used to indicate whether the coating adhesion of the test coated part D12 is abnormal. Taking the detection mechanism 33 as an example, if the coating on the test coated part D12 after the coating peeling operation is performed, the coating peeling result obtained by the detection mechanism 33 indicates that the coating adhesion of the test coated part D12 is abnormal. If the coating on the test coated part D12 after the coating peeling operation is performed does not fall off, the coating peeling result obtained by the detection mechanism 33 indicates that the coating adhesion of the test coated part D12 is normal.

[0069] It should be noted that the “coating layer bonding force” mentioned in the embodiments of the present application refers to the bonding force between the coating layer 01 and the substrate layer 02 .

[0070] The location of the detection mechanism 33 can be adjusted based on the type of peeling mechanism 32. Generally, regardless of the specific structure of the peeling mechanism 32, the detection mechanism 33 can be arranged along the tape path of the test coated part D12, between the peeling mechanism 32 and the second reel-up mechanism 31. That is, during the process of being transported to the second reel-up mechanism 31, the test coated part D12 passes through the peeling mechanism 32 and undergoes multiple coating stripping operations by the peeling mechanism 32. It then passes through the detection mechanism 33 and obtains coating stripping results from the detection mechanism 33 multiple times before finally being reeled up to the second reel-up mechanism 31. Of course, in other situations, if the peeling mechanism 32 performs a coating stripping operation on the test coated part D12 using tape, the detection mechanism 33 can also be arranged along the path of the torn tape.

[0071] The detection mechanism 33 can obtain coating layer peeling results through various means. For example, the detection mechanism 33 can be implemented through visual inspection. In some examples, the detection mechanism 33 can include a camera and an image analysis unit. The camera captures image data of the test coated part D12, and the image analysis unit analyzes the image data and determines the degree of coating layer peeling on the test coated part D12 based on the image data analysis. Of course, the detection mechanism 33 can also use other methods, such as those described in the following embodiments, to obtain coating layer peeling results.

[0072] When testing the coating adhesion strength of a coated article D1 for abnormal coating adhesion, the surface coating adhesion testing system 100 uses a slitting mechanism 10 to separate the coated article D1 into a finished coated article D11 and a test coated article D12. During the slitting process, the finished coated article D11 is reeled up by a first reeling mechanism 20, and the test coated article D12 is reeled up by a second reeling mechanism 31. While the test coated article D12 is being fed to the second reeling mechanism 31, the stripping mechanism 32 strips the coating from the test coated article D12. Finally, the testing mechanism 33 obtains the coating stripping result for the test coated article D12.

[0073] Because the test coated part D12 and the finished coated part D11 are cut from the same test coated part D1, the test results of the test coated part D12 are applicable to the finished coated part D11. Furthermore, the test coated part D12 and the finished coated part D11 are continuously conveyed to the first reel-up mechanism 20 and the second reel-up mechanism 31, respectively. The stripping mechanism 32 can test multiple locations of the test coated part D12, and the test range can basically cover the entire test coated part D12, thereby obtaining the coating stripping results for most areas of the test coated part D12. This is equivalent to achieving surface coating adhesion testing for most areas of the finished coated part D11. Compared to existing sampling testing, the technical solution provided by the embodiment of the present application can basically achieve surface coating adhesion testing for all locations along the length of the test coated part D11. The test coverage is wide, and the test results are more representative of the actual product conditions, with higher test reliability.

[0074] In the embodiment of the present application, the “multiple locations” of the test coating member D12 refer to multiple areas that are continuously or spaced apart in the length direction of the test coating member D12 .

[0075] In some embodiments, referring to Figure 2, the surface coating layer bonding strength detection device 30 also includes a controller (not shown) and a marking mechanism 34. The controller is communicatively connected with the marking mechanism 34 and the detection mechanism 33. The controller is used to control the marking mechanism 34 to perform a marking operation on the finished coated part D11 according to the coating layer peeling result.

[0076] A controller (not shown) is a device / component / device with data processing capabilities. It can include a central processing unit (CPU), a microprocessor (MCU), or an embedded single-chip microcomputer (MCU). It can be a laptop, industrial computer, mobile terminal (such as a mobile phone or smartwatch), or server.

[0077] The controller can be integrated with the detection mechanism 33, and can also be integrated with the marking mechanism 34. The controller can also exist independently of the detection mechanism 33 and the marking mechanism 34.

[0078] The marking mechanism 34 is a mechanism for marking the coated part. The marking method may include, but is not limited to, labeling, cutting a notch on the edge, or stamping and embossing. The specific marking method and structure of the marking mechanism 34 can be selected and designed conventionally. In actual use, the marking mechanism 34 is positioned near the finished coated part D11. Specifically, the marking mechanism 34 may be positioned at the edge of the tape path where the finished coated part D11 travels from the slitting mechanism 10 to the first rewinding mechanism 20.

[0079] The controller can control the marking mechanism 34 to mark the finished coated part D11 according to the coating stripping result. It is easy to understand that the detection mechanism 33 obtains the coating stripping result of the test coated part D12 one by one, and the shorter the interval, the higher the detection accuracy.

[0080] Each time the controller obtains the peeling adhesion result from the detection mechanism 33, it can control the marking mechanism 34 to perform a corresponding marking operation on the finished coated part D11. In some examples, the controller's control method may include the following steps: obtaining the current coating layer peeling result and identifying the type of the current coating layer peeling result; if the type of the current coating layer peeling result is abnormal, controlling the marking mechanism 34 to perform a first marking operation; if the type of the current coating layer peeling result is normal, controlling the marking mechanism 34 to perform a second marking operation. The marking mechanism 34 can identify the finished coated part D11 by affixing different colored labels when performing the first and second marking operations.

[0081] The controller can also control the marking operation to perform corresponding marking operations only at the starting position and end position where the coating layer peeling result indicates insufficient peeling bonding force. In some examples, the controller's control method may include the following steps: obtaining the current coating layer peeling result and identifying the type of the current coating layer peeling result; if the type of the current coating layer peeling result is abnormal, obtaining the type of the previous coating layer peeling result; if the type of the previous coating layer peeling result is normal, controlling the marking mechanism 34 to perform an abnormal starting point marking operation; if the type of the current coating layer peeling result is normal, obtaining the type of the previous coating layer peeling result; if the type of the previous coating layer peeling result is abnormal, controlling the marking mechanism 34 to perform an abnormal endpoint marking operation. In this case, the marking mechanism 34 only needs to mark the end positions of the interval where the coating layer bonding force is abnormal, which simplifies the operation of the marking mechanism 34 and reduces the probability of damage to the finished coated part D11 due to marking. In particular, when performing the abnormal starting point marking operation and the abnormal endpoint marking operation, the marking mechanism 34 can identify them by affixing labels of different colors.

[0082] Typically, the detection mechanism 33 is set at a first fixed position, and the marking mechanism 34 is set at a second fixed position, and is arranged along the tape path of the finished coated part D11.

[0083] The following describes the positional arrangement of the detection mechanism 33 corresponding to the test coated article D12 after the stripping operation. Each time, the detection mechanism 33 obtains the coating stripping result of a portion of the test coated article D12 that passes through the first fixed position (defined as the first length portion) after the stripping operation. If the coating stripping result of the first length portion indicates abnormal coating adhesion, this indicates abnormal coating adhesion of the second length portion of the finished coated article D11 corresponding to the first length portion (the position of the first length portion in the longitudinal direction of the test coated article D12 is substantially the same as the position of the second length portion in the longitudinal direction of the finished coated article D11). The marking mechanism 34 then performs a corresponding marking operation on the second length portion that passes through the second fixed position.

[0084] On the contrary, if the coating layer peeling result of the first length portion indicates that the coating layer bonding strength is normal, it means that the coating layer bonding strength of the second length portion in the finished coated part D11 corresponding to the first length portion is normal, then the marking mechanism 34 can perform corresponding marking operations on the second length portion passing through the second fixed position.

[0085] During design, within a certain period of time after the first length portion passes through the first fixed position of the detection mechanism 33 (this period is generally determined by the time difference between the detection mechanism 33 obtaining the coating layer stripping result and the marking mechanism 34 performing the marking operation based on the coating layer stripping result), it is necessary to control the second length portion to pass through the second fixed position of the marking mechanism 34 so that the marking mechanism 34 can mark the second length portion during the marking operation. This requires consideration of the relationship between the running speed of the test coated part D12 and the running speed of the finished coated part D11. Those skilled in the art can achieve this through reasonable mathematical design, and the specific design method is not elaborated in detail in the embodiments of this application.

[0086] In this way, the surface coating layer bonding strength detection system 100 can also mark the corresponding position on the finished coated part D11 when the coating layer bonding strength does not meet the requirements, so as to facilitate the subsequent identification of the part with unqualified coating layer bonding strength in the finished coated part D11, and facilitate relevant personnel to cut off the part with unqualified coating layer bonding strength, which can not only reduce the use of unqualified products and cause product quality problems, but also improve the utilization rate of the finished coated part D11 and reduce waste.

[0087] Of course, in other embodiments, if the marking mechanism 34 is not provided, the computer equipment can also analyze the position data of the finished coated parts D11 with normal coating layer bonding strength and insufficient coating layer bonding strength based on the coating layer peeling results obtained by the detection mechanism 33, so as to facilitate relevant personnel to remove unqualified parts.

[0088] FIG3 is a schematic diagram illustrating the components of a surface coating layer bonding force detection device 30 according to one or more embodiments.

[0089] In some embodiments, referring to FIG. 3 , the stripping mechanism 32 includes a first guide roller pair 32a and a stripping roller pair 32c. The first guide roller pair 32a and the stripping roller pair 32c are arranged on the tape path of the test coated part D12, and the stripping roller pair 32c is located between the first guide roller pair 32a and the second winding mechanism 31. The linear velocity of the roller surface of the first guide roller pair 32a is configured to be equal to the linear velocity of the roller surface of the first winding mechanism 20, while the linear velocity of the roller surface of the stripping roller pair 32c is configured to be different from the linear velocity of the roller surface of the first guide roller pair 32a.

[0090] In the embodiment of the present application, each "pressing roller pair" includes two pressing rollers arranged opposite to each other, with a roller gap formed between the two pressing rollers. When the test coated part D12 passes through the roller gap, it contacts the two pressing rollers and is pushed by the two pressing rollers to move. It can be understood that the roller surface linear speeds of the two pressing rollers in each "pressing roller pair" are the same and the rotation directions are opposite. In the embodiment shown in Figure 3, the two pressing rollers of each "pressing roller pair" are spaced apart in the vertical direction. Each pressing roller in the "pressing roller pair" can be made of, but is not limited to, rubber material, which has a large surface friction and can reduce the degree of slippage of the test coated part D12.

[0091] Roller surface linear velocity refers to the speed of movement at any point on the roller surface. Roller speed refers to the number of revolutions per minute. For rollers with the same diameter and speed, rollers with the same speed will have the same roller surface linear velocity. Theoretically, the relationship between roller surface linear velocity and roller speed is as follows: Roller surface linear velocity = Roller surface length × Speed ​​× π ÷ 60, where Roller surface length refers to the contact length between the roller and the coating layer, typically the axial length of the roller, and π is the ratio of the circumference of the roller to the circumference of ...

[0092] The linear velocity of the first guide roller pair 32a is equal to the linear velocity of the first winding mechanism 20. This means that the speed at which the test coated component D12 travels from the slitting mechanism 10 to the first guide roller pair 32a is the same as the speed at which the finished coated component D11 travels from the slitting mechanism 10 to the first winding mechanism 20. This ensures that the speeds of the test coated component D12 and the finished coated component D11 are the same near the slitting mechanism 10, facilitating the slitting of the test coated component D1 by the slitting mechanism 10. The linear velocity of the first winding mechanism 20 refers to the speed of its winding roller.

[0093] The roller surface linear velocity of the stripping roller pair 32c is different from the roller surface linear velocity of the first guide roller pair 32a. When the test coated part D12 is traveling in the second area Q2 between the first guide roller pair 32a and the stripping roller pair 32c, the stripping roller pair 32c can apply a stripping force to the test coated part D12. The stripping force can be a friction force that prevents the coating layer 01 from following the movement of the substrate layer 02 and causes the coating layer 01 to be dislocated relative to the substrate layer 02. The stripping force can also be a tensile force that pulls the coating layer 01 to move ahead relative to the substrate layer 02 and causes the coating layer 01 to extend. When the coating layer 01 extends and is dislocated relative to the substrate layer 02, abnormal phenomena such as peeling, bubbles, and detachment will occur.

[0094] At this time, the first guide roller pair 32a transports the test coated part D12 to the second winding mechanism 31, and at the same time uses the stripping roller pair 32c to continuously perform the coating layer stripping operation on the test coated part D12. The coating layer 01 stripping effect is good, and the structure is simple and the cost is low. Therefore, the detection mechanism 33 can continuously obtain the coating layer stripping results, so that the detection results cover a larger product range and the detection reliability is higher.

[0095] The "tape path" mentioned in the embodiments of the present application refers to the moving trajectory of the tape-shaped component (such as the test coated component C11, the finished coated component C12, and the coated component to be inspected D1) when it moves under the guidance of an external object.

[0096] In some embodiments, referring to FIG. 3 , the peeling roller pair 32 c includes a stretching roller pair c1 , and the roller surface linear velocity of the stretching roller pair c1 is configured to be greater than the roller surface linear velocity of the first guide roller pair 32 a .

[0097] Understandably, the stretching roller pair c1 is arranged between the first guide roller pair 32a and the second winding mechanism 31. When the linear velocity of the stretching roller pair c1 is greater than that of the first guide roller pair 32a, the stretching roller pair c1 can exert a tensile force on the coating layer 01 passing through the second region Q2, thereby pulling the coating layer 01 to extend relative to the substrate layer 02. If the coating layer has abnormal bonding strength, the coating layer 01, pulled by the tensile force, can easily separate from the substrate layer 02, resulting in peeling, wrinkling, or even breaking. In this case, the coating layer 01 may or may not break or may or may not fall off the substrate layer 02.

[0098] At this time, the stretching roller pair c1 exerts a tensile force on the surface of the coating layer 01 of the test coated part D12, pulling the coating layer 01 away from the substrate layer 02. It is only necessary to reasonably control the roller surface linear speed of the stretching roller pair c1. Its structure is simple and the peeling force is easy to adjust.

[0099] In some embodiments, the linear velocity increase rate δ1 of the stretching roller pair c1 relative to the first guide roller pair 32a and the breaking elongation δ2 of the substrate layer 02 of the test coating member D12 satisfy: 20%≤δ1 / δ2≤90%.

[0100] The linear velocity growth rate δ1 of the stretching roller pair c1 relative to the first guide roller pair 32a refers to the growth rate between the roller surface linear velocities of the two. In some examples, the linear velocity growth rate δ1 can be calculated as follows: δ1 = (Vc1-V32a) / V32a, where Vc1 is the roller surface linear velocity of the stretching roller pair c1, and V32a is the roller surface linear velocity of the first guide roller pair 32a.

[0101] Elongation at break refers to the ratio of the maximum extension of an object before breaking when stretched to its initial length. Tested coated part D12 comprises a substrate layer 02 and a coating layer 01 applied thereon. The elongation at break δ2 of substrate layer 02 is the elongation at break of substrate layer 02 before coating layer 01 is applied. Different substrate layers 02 materials have different elongations at break δ2. When substrate layer 02 is a polymer material, its elongation at break can be measured according to GB / T 1040.1-2018, "Determination of Tensile Properties of Plastics."

[0102] Understandably, when the test-coated article D12 passes through the second region Q2 between the first guide roller pair 32a and the stretching roller pair c1, the tension exerted by the stretching roller pair c1 will also exert a certain effect on the substrate layer 02. To prevent the substrate layer 02 from being broken, the linear velocity increase rate δ1 of the stretching roller pair c1 relative to the first guide roller pair 32a should be designed to be less than the elongation at break δ2 of the substrate layer 02. If the substrate layer 02 is broken, the test-coated article D12 will not be able to continue to run.

[0103] In some examples, the linear velocity increase rate δ1 of the stretching roller pair c1 relative to the first guide roller pair 32a and the elongation at break δ2 of the substrate layer 02 should satisfy a value of δ1 / δ2 within a range of 20% to 90%, such as 20%, 30%, 40%, 50%, 60%, 70%, 80%, 90%, or any value between two adjacent values. Further, the value may be 40% to 80%.

[0104] When δ1 / δ2 is within the above range, it not only reduces the probability of the substrate layer 02 being torn, but also applies a greater tensile force to the coating layer 01, so that the coating layer 01 whose bonding strength does not meet the requirements can be smoothly torn.

[0105] In some embodiments, referring to FIG. 3 , the stripping roller pair 32 c includes a friction roller pair c2 , which is located along the tape path of the test coated part D12 between the stretching roller pair c1 and the second winding mechanism 31 . The linear velocity of the friction roller pair c2 is configured to be different from the linear velocity of the stretching roller pair c1 , and the linear velocity of the second winding mechanism 31 is configured to be equal to the linear velocity of the stretching roller pair c1 .

[0106] The roller surface linear velocity of the friction roller pair c2 may be slightly smaller or slightly larger than the roller surface linear velocity of the stretching roller pair c1.

[0107] Since the roller surface linear speed of the stretching roller pair c1 is equal to the roller surface linear speed of the second winding mechanism 31, and the roller surface linear speed of the friction roller pair c2 is not equal to the roller surface linear speed of the stretching roller pair c1, after the test coated part D12 is pulled and peeled by the stretching roller pair c1, the coating layer 01 may still be supported on the substrate layer 02. When passing through the friction roller pair c2, under the friction of the friction roller pair c2, the peeled coating layer 01 is more likely to fall off from the substrate layer 02 and directly expose the substrate layer 02. In this way, when the controller obtains the coating layer peeling result based on the detection mechanism 33, the detection accuracy of the detection mechanism 33 is higher.

[0108] Of course, in other embodiments, the peeling roller pair 32c may only include the friction roller pair c2. At this time, the roller surface linear speed of the friction roller pair c2 is different from the roller surface linear speed of the first guide roller pair 32a (slightly larger or slightly smaller). The friction roller pair c2 uses friction to cause the coating layer 01 to separate from the substrate layer 02, or even fall off from the substrate layer 02. At this time, the roller surface linear speed of the second winding mechanism 31 can be consistent with the roller surface linear speed of the first guide roller pair 32a.

[0109] In the above embodiment, the peeling mechanism 32 peels off the coating layer 01 by cooperating with each pair of pressure rollers. In other embodiments, the peeling mechanism 32 can also peel off the coating layer 01 by, for example, using a tape to peel off the coating layer 01. As an example, the roller surface linear speed of the peeling pressure roller pair 32c in the above embodiment is designed to be the same as that of the first guide pressure roller pair 32a. By providing double-sided tape on the peeling pressure roller pair 32c, the coating layer 01 is peeled off using the double-sided tape. In addition, the peeling mechanism 32 can also peel off the coating layer 01 by providing a scraper to scrape off the coating layer 01. As an example, the peeling pressure roller pair 32c in the above embodiment is replaced with a scraper.

[0110] In some embodiments, referring to FIG. 3 , the surface coating layer bonding strength detection device 30 further includes a powder collecting mechanism 35 . The powder collecting mechanism 35 is located between the stretching roller pair c1 and the friction roller pair c2 .

[0111] The powder collection mechanism 35 is used to collect the coating layer 01 peeled from the substrate layer 02. The powder collection mechanism 35 can be a negative pressure mechanism, a magnetic attraction mechanism, a positive pressure purge mechanism, or other similar mechanisms. The specific structure of the powder collection mechanism is generally selected by those skilled in the art and will not be described in detail here. In some examples, the area between the stretching roller pair c1 and the friction roller pair c2 is the third area Q3, and the powder collection mechanism 35 primarily collects powder from this third area Q3.

[0112] At this time, the powder collecting mechanism 35 collects the powder of the coating layer 01 peeled off from the base layer 02 , thereby reducing the pollution of the peeled coating layer 01 to the environment.

[0113] In some embodiments, referring to Figure 3, the stripping mechanism 32 also includes a second guide roller pair 32b, the second guide roller pair 32b is located on the tape path of the test coating part D12, and the first guide roller pair 32a is located between the second guide roller pair 32b and the stripping roller pair 32c, and the roller surface linear velocity of the second guide roller pair 32b is configured to be the same as the roller surface linear velocity of the first guide roller pair 32a.

[0114] The second guide roller pair 32b is used to guide the test coated article D12 from the slitting mechanism 10 to the first guide roller pair 32a. The roller surface linear velocity of the second guide roller pair 32b is the same as the roller surface linear velocity of the first guide roller pair 32a. In other words, the roller surface linear velocity of the first guide roller pair 32a, the second guide roller pair 32b, and the first winding mechanism 20 are the same.

[0115] The test coated part D12 can be moved from the second guide roller pair 32b to the first guide roller pair 32a at the same speed as the finished coated part D11 being moved to the first winding mechanism 20. The area between the first guide roller pair 32a and the second guide roller pair 32b is defined as the first area Q1.

[0116] At this time, the first area Q1 can provide a running area for the test coated part D12 with the same running speed as the finished coated part D11. A certain length of the test coated part D12 can be cached through the first area Q1, so that when the measured coated part passes through the first area Q1, its coating layer 01 will not be affected by the peeling roller pair 32c, which can play a buffering role and prevent the force of the peeling roller pair 32c from being transmitted to the slitting mechanism 10, affecting the running and slitting of the coated part D1 to be tested.

[0117] Of course, in other embodiments, other roller pairs may be provided between the first guide roller pair 32a and the second guide roller pair 32b, and the "other roller pairs" may have the same roller surface linear velocity as the first guide roller pair 32a and the second guide roller pair 32b.

[0118] In some embodiments, referring to FIG3 , the detection mechanism 33 is disposed between the stripping mechanism 32 and the second winding mechanism 31. That is, the detection mechanism 33 can directly obtain the coating stripping result based on the test coated part D12 subjected to the coating stripping operation by the stripping roller pair 32 c, thereby simplifying the overall structure of the surface coating layer bonding strength detection device 30.

[0119] Of course, in other embodiments, the stripping mechanism 32 may also include an adhesive portion (not shown), which is used to pick up the coating material that has fallen off the test coating part D12. The detection mechanism 33 can obtain the coating stripping result of the test coating part D12 by determining whether there is coating material on the adhesive portion.

[0120] In some embodiments, referring to FIG. 3 , the detection mechanism 33 includes a light emitter 33 d and a light collector 33 e . The light emitter 33 d and the light collector 33 e are configured to be matched and arranged on opposite sides of the test coating component D12 .

[0121] The light emitter 33d is matched with the light collector 33e, the former is used to emit specific light, and the latter is used to receive the specific light. The "specific light" can be, but is not limited to, laser, infrared light, blue light, etc.

[0122] The light emitter 33d and the light collector 33e are arranged on opposite sides of the test coating D12, which means that the two are arranged on opposite sides of the test coating D12 in the thickness direction. Usually, the coating layer 01 is located on at least one of the "opposite sides" of the test coating.

[0123] When the coating layer O1 on the test coating part D12 passing through the detection mechanism 33 peels off, the light emitted by the light emitter 33d can pass through the test coating part D12 and be received by the light collector 33e. In this way, the coating layer peeling result obtained by the detection mechanism 33 can be the light reception result of the light receiver. For example, when the light receiver receives light, it feedbacks to the controller indicating that the coating layer has abnormal adhesion. When the light receiver does not receive light, the controller feedbacks that the coating layer has good adhesion. Furthermore, the controller can control the marking mechanism 34 to perform a marking operation based on the feedback from the light reception.

[0124] At this time, the light emitter 33d and the light collector 33e are used in conjunction with each other to realize the detection mechanism 33 to detect the peeling result of the coating layer. The detection result is reliable and the cost is low.

[0125] In some embodiments, referring to FIG. 2 , the surface coating adhesion testing system 100 may further include a coating unwinding roller 40 for unwinding the coating component D1 to be tested. The coating component D1 released by the coating unwinding roller 40 is conveyed to the slitting mechanism 10 , where it is cut into a finished coating component D11 and a test coating component D12 . The surface coating adhesion testing system 100 is adapted to perform coating adhesion testing on the coating component D1 after it has been rolled.

[0126] In one embodiment of the present application, a surface coating layer bonding strength detection system 100 includes a slitting mechanism 10, a first winding mechanism 20, and a surface coating layer bonding strength detection device 30. The surface coating layer bonding strength detection device 30 includes a marking mechanism 34 and a second guide roller pair 32b, a first guide roller pair 32a, a stretching roller pair c1, a friction roller pair c2, a detection mechanism 33, and a second winding mechanism 31, which are arranged in sequence. The slitting mechanism 10 is used to slit the coating member D1 to be inspected into a finished coating member D11 and a test coating member D12. The finished coating member D11 is wound onto the first winding mechanism 20, and the test coating member D12 is wound onto the second winding mechanism 31 after passing through the second guide roller pair 32b, the first guide roller pair 32a, the stretching roller pair c1, the friction roller pair c2, and the detection mechanism 33. The first guide roller pair 32a, the second guide roller pair 32b, and the first winding mechanism 20 have the same roller surface linear velocity. The stretching roller pair c1 has a higher roller surface linear velocity than the first guide roller pair 32a. The friction roller pair c2 has a different roller surface linear velocity than the first guide roller pair 32a and the stretching roller pair c1. The second winding mechanism 31 has the same roller surface linear velocity as the stretching roller pair c1. The marking mechanism 34 is positioned corresponding to the finished coated part D11. The detection mechanism 33 is used to obtain the coating stripping results of the test coated part D12. The marking mechanism 34 performs a marking operation on the finished coated part D11 based on the coating stripping results.

[0127] In addition, referring to FIG3 , an embodiment of the present application further provides a surface coating layer adhesion testing device 30 for testing a coated part D12. The surface coating layer adhesion testing device 30 includes a second reeling mechanism 31, a stripping mechanism 32, and a testing mechanism 33. The second reeling mechanism 31 is used to reel in the coated part D12 being tested. The stripping mechanism 32 is used to guide the coated part D12 being tested to the second reeling mechanism 31 and to perform a coating layer stripping operation on the coated part D12 passing through the second reeling mechanism 31. The testing mechanism 33 is used to obtain a coating layer stripping result indicating whether the coating layer adhesion of the coated part D12 being tested is abnormal.

[0128] For detailed description of the second winding mechanism 31 , the peeling mechanism 32 and the detecting mechanism 33 , please refer to the above description and will not be repeated here.

[0129] The surface coating adhesion testing device 30 is used to test the adhesion of the coating on a test coated part D12. The test coated part D12 is continuously fed under the guidance of a second winding mechanism 31 and a stripping mechanism 32. The stripping mechanism 32 can strip the coating at multiple locations on the test coated part D12 and, in conjunction with the testing mechanism 33, obtain coating stripping results at multiple locations along the test coated part D12 along the feeding direction. This makes it suitable for testing the adhesion of the surface coating on a longer test coated part D12.

[0130] Furthermore, when used in conjunction with the slitting mechanism 10 and the first winding mechanism 20, the surface coating adhesion testing device 30 obtains test results for multiple locations on the test coated article D12, effectively testing the surface coating adhesion of a majority of the finished coated article D11. This test result is more representative of the actual state of the finished coated article D11, resulting in higher test reliability. Compared to conventional sampling testing, this method helps expand the test range and improve the test reliability of the tested coated article D1.

[0131] In some embodiments, referring to FIG. 3 , the stripping mechanism 32 includes a first guide roller pair 32a and a stripping roller pair 32c. The first guide roller pair 32a and the stripping roller pair 32c are arranged on the tape path of the test coated part D12, and the stripping roller pair 32c is located between the first guide roller pair 32a and the second winding mechanism 31. The linear velocity of the stripping roller pair 32c is configured to be different from the linear velocity of the first guide roller pair 32a.

[0132] For the introduction of the peeling roller pair 32c, the first guide roller pair 32a, and the second winding mechanism 31, please refer to the above description and will not be repeated here.

[0133] The first guide roller pair 32a conveys the test coated part D12 to the second winding mechanism 31, and at the same time uses the stripping roller pair 32c to continuously perform the coating layer stripping operation on the test coated part D12. The coating layer 01 stripping effect is good, and the structure is simple and the cost is low. Therefore, the detection mechanism 33 can continuously obtain the coating layer stripping results, so that the detection results cover a larger product range and the detection reliability is higher.

[0134] In some embodiments, referring to FIG. 3 , the peeling roller pair 32 c includes a stretching roller pair c1 , and the roller surface linear velocity of the stretching roller pair c1 is configured to be greater than the roller surface linear velocity of the first guide roller pair 32 a .

[0135] At this time, the stretching roller pair c1 exerts a tensile force on the surface of the coating layer 01 of the test coated part D12, pulling the coating layer 01 away from the substrate layer 02. It is only necessary to reasonably control the roller surface linear speed of the stretching roller pair c1. Its structure is simple and the peeling force is easy to adjust.

[0136] In some embodiments, referring to FIG. 3 , the stripping roller pair 32 c includes a friction roller pair c2 , which is located along the tape path of the test coated part D12 between the stretching roller pair c1 and the second winding mechanism 31 . The linear velocity of the friction roller pair c2 is configured to be different from the linear velocity of the stretching roller pair c1 , and the linear velocity of the second winding mechanism 31 is configured to be equal to the linear velocity of the stretching roller pair c1 .

[0137] Since the roller surface linear speed of the stretching roller pair c1 is equal to the roller surface linear speed of the second winding mechanism 31, and the roller surface linear speed of the friction roller pair c2 is not equal to the roller surface linear speed of the stretching roller pair c1, when the test coated part D12 is pulled and peeled by the stretching roller pair c1, when it passes through the friction roller pair c2, the peeled coating layer 01 is more easily peeled off from the substrate layer 02 under the friction of the friction roller pair c2. In this way, when the controller obtains the coating layer peeling result based on the detection mechanism 33, the detection accuracy of the detection mechanism 33 is higher.

[0138] In some embodiments, referring to FIG. 3 , the surface coating layer bonding strength detection device 30 further includes a powder collecting mechanism 35 . The powder collecting mechanism 35 is located between the stretching roller pair c1 and the friction roller pair c2 .

[0139] The powder collecting mechanism 35 is described in detail above. At this time, the powder collecting mechanism 35 is used to collect the detached coating layer 01 powder, which can reduce the pollution to the environment caused by the detached coating layer 01.

[0140] In some embodiments, referring to Figure 3, the stripping mechanism 32 also includes a second guide roller pair 32b, the second guide roller pair 32b is located on the tape path of the test coating part D12, and the first guide roller pair 32a is located between the second guide roller pair 32b and the stripping roller pair 32c, and the roller surface linear velocity of the second guide roller pair 32b is configured to be the same as the roller surface linear velocity of the first guide roller pair 32a.

[0141] The second guide roller is described above in detail. At this point, the first area Q1 provides a running area for the test coated part D12 at the same running speed as the finished coated part D11. This area Q1 can buffer a certain length of the test coated part D12, ensuring that when the test coated part passes through the first area Q1, its coating layer O1 is not affected by the stripping roller pair 32c. This acts as a buffer, preventing the force of the stripping roller pair 32c from being transmitted to the slitting mechanism 10 and affecting the running and slitting of the test coated part D1.

[0142] Of course, in other embodiments, other roller pairs may be provided between the first guide roller pair 32a and the second guide roller pair 32b, and the "other roller pairs" may have the same roller surface linear velocity as the first guide roller pair 32a and the second guide roller pair 32b.

[0143] In some embodiments, the linear velocity increase rate δ1 of the stretching roller pair c1 relative to the first guide roller pair 32a and the breaking elongation δ2 of the substrate layer 02 of the test coating member D12 satisfy: 20%≤δ1 / δ2≤90%.

[0144] For the introduction of the linear velocity growth rate δ1 and the elongation at break δ2, refer to the above description.

[0145] When δ1 / δ2 is within the above range, it not only reduces the probability of the substrate layer 02 being torn, but also applies a greater tensile force to the coating layer 01, so that the coating layer 01 whose bonding strength does not meet the requirements can be smoothly torn.

[0146] In some embodiments, referring to FIG3 , the detection mechanism 33 is disposed between the stripping mechanism 32 and the second winding mechanism 31. That is, the detection mechanism 33 can directly obtain the coating stripping result based on the test coated part D12 subjected to the coating stripping operation by the stripping roller pair 32 c, thereby simplifying the overall structure of the surface coating layer bonding strength detection device 30.

[0147] In some embodiments, referring to FIG. 3 , the detection mechanism 33 includes a light emitter 33 d and a light collector 33 e . The light emitter 33 d and the light collector 33 e are configured to be matched and arranged on opposite sides of the test coating component D12 .

[0148] The light emitter 33d and the light collector 33e are described in detail above.

[0149] At this time, the light emitter 33d and the light collector 33e are used in conjunction with each other to realize the detection mechanism 33 to detect the peeling result of the coating layer. The detection result is reliable and the cost is low.

[0150] In some embodiments, referring to Figure 3, the surface coating layer bonding force detection device 30 also includes a controller (not shown) and a marking mechanism 34. The controller is communicatively connected with the marking mechanism 34 and the detection mechanism 33. The controller is used to control the marking mechanism 34 to perform a marking operation according to the coating layer peeling result.

[0151] The controller and marking mechanism 34 are described in detail above and will not be repeated here. In specific applications, the marking mechanism 34 can be used, but is not limited to, to perform a marking operation on the finished coated part D11. The finished coated part D11 is described in detail above.

[0152] At this time, the surface coating layer bonding strength detection system 100 can also mark the corresponding position on the finished coated part D11 when the coating layer bonding strength does not meet the requirements, so as to facilitate the subsequent identification of the part with unqualified coating layer bonding strength in the finished coated part D11, and facilitate relevant personnel to cut off the part with unqualified coating layer bonding strength, which can not only reduce the use of unqualified products and cause product quality problems, but also improve the utilization rate of the finished coated part D11 and reduce waste.

[0153] It should be noted that the surface coating layer bonding strength detection device 30 also includes all the features and effects of the surface coating layer bonding strength detection device 30 in the above embodiment. Please refer to the above description for details and will not be repeated here.

[0154] It should be noted that when both sides of the test coated part D12 have coating layers 01, the surface coating layer bonding strength detection device 30 provided in the embodiment of the present application can be used to perform coating layer bonding strength detection on the two coating layers 01 of the test coated part D12 layer by layer, or the surface coating layer bonding strength detection device 30 can be used to perform surface coating layer bonding strength detection on both coating layers 01 simultaneously. For example, the stripping mechanism 32 can be provided on both sides of the test coated part D12 to perform coating layer stripping operations on the coating layers 01 on both sides respectively.

[0155] In addition, please refer to FIG. 4 , which is a flow chart of a method for detecting the bonding strength of a surface coating layer according to one or more embodiments. The present application also provides a method for detecting the bonding strength of a surface coating layer. The method for detecting the bonding strength of a surface coating layer includes:

[0156] S100, calling the slitting mechanism 10 to slit the coated part D1 to be tested on the tape to obtain a finished coated part D11 and a test coated part D12;

[0157] S200, calling the first winding mechanism 20 to wind up the finished coated part D11, and calling the second winding mechanism 31 to wind up the test coated part D12;

[0158] S300. When the test coated part D12 is conveyed to the second winding mechanism 31, the stripping mechanism 32 is called to perform a coating stripping operation on the test coated part D12, and the detection mechanism 33 is called to obtain a coating stripping result indicating whether the coating bonding strength of the test coated part D12 is abnormal.

[0159] The surface coating layer adhesion testing method in the embodiments of the present application can be applied to, but is not limited to, the surface coating layer adhesion testing system 100 described above, or to a device / system including the surface coating layer adhesion testing system 100. The device that executes the surface coating layer adhesion testing method can be, but is not limited to, the controller in the surface coating layer adhesion testing device 30.

[0160] In step S100, the slitting mechanism 10 can be used to slit the coated article D1 to be inspected, thereby obtaining a finished coated article D11 and a test coated article D12. Typically, the coated article D1 to be inspected is in a roll form and is unwound by the unwinding mechanism 200 and conveyed by a conveying mechanism (e.g., a roller) toward the slitting mechanism 10. Alternatively, the coated article D1 to be inspected can be slit by the slitting mechanism 10 while stationary.

[0161] In step S200 , the first winding mechanism 20 and the second winding mechanism 31 may be called to wind up the finished coated part D11 and the test coated part D12 respectively.

[0162] In step S300, the stripping mechanism 32 can be called to perform a coating stripping operation on the test coated article D12 while the test coated article D12 is being fed to the second reeling mechanism 31. Furthermore, while the test coated article D12 is being fed, the detection mechanism 33 can be called to obtain a coating stripping result for the test coated article D12.

[0163] This surface coating adhesion testing method utilizes a stripping mechanism 32 to perform coating stripping operations on multiple locations of a test coated part D12. The testing mechanism 33 then obtains test results for multiple locations of the test coated part D12. This effectively enables surface coating adhesion testing across a substantial portion of the finished coated part D11. This testing structure is more representative of the actual state of the finished coated part D11, resulting in higher test reliability. Compared to existing sampling testing methods, this method helps expand the testing range and improve the reliability of testing of the tested coated part D11.

[0164] In some embodiments, please refer to FIG5 , which is a flow chart of a method for detecting the bonding strength of a surface coating layer according to another or more embodiments. The method for detecting the bonding strength of a surface coating layer further includes:

[0165] S400 , based on the coating layer stripping result, calling the marking mechanism 34 to mark the finished coated part D11 during the process of the finished coated part D11 being conveyed to the first winding mechanism 20 .

[0166] In some examples, when executing S400, the controller performs the following steps: S401, obtain the current peeling bonding force result and identify the type of the current peeling bonding force result; S402, if the type of the current peeling bonding force result is abnormal, obtain the type of the previous peeling bonding force result; S403, if the type of the previous peeling bonding force result is normal, control the marking mechanism 34 to perform an abnormal starting point marking operation; S404, if the type of the current peeling bonding force result is normal, obtain the type of the previous peeling bonding force result; S405, if the type of the previous peeling bonding force result is abnormal, control the marking mechanism 34 to perform an abnormal end point marking operation.

[0167] At this time, the surface coating layer adhesion detection system 100 can also mark the finished coated part D11 according to the coating layer adhesion result, so as to facilitate the subsequent identification of the part with unqualified coating layer adhesion in the finished coated part D11, and facilitate relevant personnel to cut off the part with unqualified coating layer adhesion. This can not only reduce the use of unqualified products and cause product quality problems, but also improve the utilization rate of the finished coated part D11 and reduce waste.

[0168] FIG6 is a schematic diagram illustrating the composition of a coating device 1000 according to one or more embodiments.

[0169] In addition, referring to FIG6 , an embodiment of the present application further provides a coating apparatus 1000 , comprising the surface coating layer adhesion detection system 100 of the above-described embodiment. The coating apparatus 1000 further comprises a coating mechanism 300 and an unwinding mechanism 200 , both of which are located on the tape path of the substrate D0 . The unwinding mechanism 200 is used to unwind the substrate D0 , and the coating mechanism 300 is used to perform a coating operation on the surface of the substrate D0 to obtain a coated part D1 to be inspected.

[0170] The unwinding mechanism 200 typically includes an unwinding roller, around which the substrate D0 is wound. The coating apparatus 1000 may also include a conveying mechanism, which may include, but is not limited to, a plurality of rollers for guiding the substrate D0 along its course. The coating mechanism 300 may be an evaporation mechanism, a sputtering mechanism, a vapor deposition mechanism, or the like, and any conventional method may be employed.

[0171] At this time, the coating equipment 1000 integrates the surface coating layer adhesion detection system 100, the coating mechanism 300, etc. into one, which can not only realize the production of coated parts, but also simultaneously realize the continuous detection of the coating layer adhesion of the coated parts. The coating equipment 1000 has a high degree of integration, and it is convenient for the staff to feed back the coating process according to the test results and adjust the coating process in time.

[0172] In addition, the present invention also provides a battery production system including the above-mentioned coating apparatus 1000. The coating apparatus 1000 can be used to produce products such as composite current collectors and electrode sheets. The composite current collector can be used to prepare positive and negative electrode sheets.

[0173] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0174] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present application, and these modifications and improvements fall within the scope of protection of the present application. Therefore, the scope of protection of the present patent application shall be determined by the appended claims.

Claims

1. A surface coating layer bonding force detection system, comprising: A slitting mechanism, used for slitting the coated parts to be tested to obtain finished coated parts and test coated parts; A first winding mechanism, used for winding the finished coated part; A surface coating layer bonding force detection device, comprising: A second winding mechanism, used for winding up the test coated part; a stripping mechanism, used for guiding the test coated part to the second winding mechanism and capable of performing a coating stripping operation on the test coated part passing through the mechanism; and The detection mechanism is used to obtain a coating layer peeling result indicating whether the coating layer bonding strength of the tested coated part is abnormal.

2. The surface coating layer bonding strength detection system according to claim 1, wherein: The surface coating layer bonding force detection device also includes a controller and a marking mechanism. The controller is communicatively connected with the marking mechanism and the detection mechanism. The controller is used to control the marking mechanism to perform a marking operation on the finished coated part according to the coating layer stripping result.

3. The surface coating layer bonding force detection system according to claim 1 or 2, wherein: The stripping mechanism comprises a first guide roller pair and a stripping roller pair; the first guide roller pair and the stripping roller pair are arranged on the tape path of the test coated part, and the stripping roller pair is located between the first guide roller pair and the second winding mechanism; The roller surface linear speed of the first guide roller pair is configured to be equal to the roller surface linear speed of the first winding mechanism, and the roller surface linear speed of the stripping roller pair is configured to be different from the roller surface linear speed of the first guide roller pair.

4. The surface coating layer bonding force detection system according to claim 3, wherein: The peeling roller pair includes a stretching roller pair, and a roller surface linear velocity of the stretching roller pair is configured to be greater than a roller surface linear velocity of the first guide roller pair.

5. The surface coating layer bonding force detection system according to claim 4, wherein: The linear velocity increase rate δ1 of the stretching roller pair relative to the first guide roller pair and the elongation at break δ2 of the substrate layer of the test coating component satisfy the following conditions: 20%≤δ1 / δ2≤90%.

6. The surface coating layer bonding force detection system according to claim 4 or 5, wherein: The stripping roller pair includes a friction roller pair; along the tape path of the test coated part, the friction roller pair is located between the stretching roller pair and the second winding mechanism; The roller surface linear speed of the friction roller pair is configured to be different from the roller surface linear speed of the stretching roller pair, and the roller surface linear speed of the second winding mechanism is configured to be equal to the roller surface linear speed of the stretching roller pair.

7. The surface coating layer bonding force detection system according to claim 6, wherein: The surface coating layer bonding force detection device also includes a powder collecting mechanism; the powder collecting mechanism is located between the stretching roller pair and the friction roller pair.

8. The surface coating layer bonding force detection system according to any one of claims 3 to 7, wherein: The stripping mechanism also includes a second guide roller pair; the second guide roller pair is located on the tape path of the test coated part, and the first guide roller pair is located between the second guide roller pair and the stripping roller pair; the roller surface linear speed of the second guide roller pair is configured to be the same as the roller surface linear speed of the first guide roller pair.

9. The surface coating layer bonding force detection system according to any one of claims 3 to 8, wherein: The detection mechanism is located between the stripping mechanism and the second winding mechanism.

10. A surface coating layer bonding force detection device for testing a coated part, the surface coating layer bonding force detection device comprising: A second winding mechanism, used for winding up the test coated part; A stripping mechanism, used for guiding the test coated part to the second winding mechanism and capable of performing a coating stripping operation on the test coated part passing through the mechanism; and The detection mechanism is used to obtain a coating layer peeling result indicating whether the coating layer bonding strength of the tested coated part is abnormal.

11. The surface coating layer bonding force detection device according to claim 10, wherein: The stripping mechanism comprises a first guide roller pair and a stripping roller pair; the first guide roller pair and the stripping roller pair are arranged on the tape path of the test coated part, and the stripping roller pair is located between the first guide roller pair and the second winding mechanism; The roller surface linear speed of the peeling roller pair is configured to be different from the roller surface linear speed of the first guide roller pair.

12. The surface coating layer bonding force detection device according to claim 11, wherein: The peeling roller pair includes a stretching roller pair, and a roller surface linear velocity of the stretching roller pair is configured to be greater than a roller surface linear velocity of the first guide roller pair.

13. The surface coating layer bonding force detection device according to claim 12, wherein: The linear velocity increase rate δ1 of the stretching roller pair relative to the first guide roller pair and the elongation at break δ2 of the substrate layer of the test coating component satisfy the following conditions: 20%≤δ1 / δ2≤90%.

14. The surface coating layer bonding force detection device according to claim 12 or 13, wherein: The stripping roller pair includes a friction roller pair; along the tape path of the test coated part, the friction roller pair is located between the stretching roller pair and the second winding mechanism; The roller surface linear speed of the friction roller pair is configured to be different from the roller surface linear speed of the stretching roller pair, and the roller surface linear speed of the second winding mechanism is configured to be equal to the roller surface linear speed of the stretching roller pair.

15. The surface coating layer bonding force detection device according to claim 14, wherein: The surface coating layer bonding force detection device also includes a powder collecting mechanism; the powder collecting mechanism is located between the stretching roller pair and the friction roller pair.

16. The surface coating layer bonding force detection device according to any one of claims 11 to 15, wherein: The stripping mechanism also includes a second guide roller pair; the second guide roller pair is located on the tape path of the test coated part, and the first guide roller pair is located between the second guide roller pair and the stripping roller pair; the roller surface linear speed of the second guide roller pair is configured to be the same as the roller surface linear speed of the first guide roller pair.

17. The surface coating layer bonding force detection device according to any one of claims 10 to 16, wherein: The detection mechanism is located between the stripping mechanism and the second winding mechanism.

18. The surface coating layer bonding force detection device according to any one of claims 10 to 17, wherein: The surface coating layer bonding force detection device also includes a controller and a marking mechanism. The controller is in communication connection with the marking mechanism and the detection mechanism. The controller is used to control the marking mechanism to perform a marking operation according to the coating layer peeling result.

19. A method for detecting the bonding strength of a surface coating layer, comprising: The slitting mechanism is called to slit the coated parts to be inspected in the conveyor belt to obtain finished coated parts and test coated parts; Calling the first winding mechanism to wind up the finished coated part, and calling the second winding mechanism to wind up the test coated part; During the process of the test coated part being conveyed to the second winding mechanism, the stripping mechanism is called to perform a coating stripping operation on the test coated part, and the detection mechanism is called to obtain a coating stripping result indicating whether the coating bonding strength of the test coated part is abnormal.

20. The method for detecting the bonding strength of a surface coating layer according to claim 19, wherein: Also includes: According to the coating layer stripping result, a marking mechanism is called to mark the finished coated part during the process of the finished coated part being conveyed to the first winding mechanism.

21. A coating device, comprising the surface coating layer bonding force detection system according to any one of claims 1 to 9; The coating equipment also includes a coating mechanism and an unwinding mechanism, both of which are located on the tape path of the substrate; the unwinding mechanism is used to unwind the substrate, and the coating mechanism is used to perform a coating operation on the surface of the substrate to obtain a coated part to be inspected.

22. A battery production system, comprising the coating device according to claim 21.

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