Coating apparatus and electrode sheet coating thickness detection method

Abstract

The application relates to the technical field of batteries and discloses a coating device and a method for detecting the thickness of a coating of an electrode sheet, which comprises a ray transmitting and receiving mechanism, which is used for emitting incident rays to an electrode sheet and receiving corresponding emergent rays of the incident rays passing through the electrode sheet while the electrode sheet is moving along the width direction of the electrode sheet; and an upper computer, which is used for obtaining the area emergent intensity of the emergent rays in the insulating coating area according to the position information of the insulating coating area on the electrode sheet and the acquisition positions of each emergent intensity data in the emergent intensity data set; and determining the thickness of the insulating coating area based on ray intensity attenuation information, wherein the ray intensity attenuation information is the attenuation information of the area emergent intensity of the emergent rays in the insulating coating area relative to the incident intensity of the incident rays, and the insulating coating area is arranged on both sides of the film area of the electrode sheet, so that the thickness of the insulating coating area of the electrode sheet can be detected in real time, and the thickness of the insulating coating area at different positions of the electrode sheet roll can also be detected.

Description

Technical Field

[0001] This invention relates to the field of battery technology, and more specifically to a coating equipment and a method for detecting the thickness of electrode coatings. Background Technology

[0002] Currently, in the lithium battery cathode coating process, cathode slurry and an insulating coating (such as AT11 ceramic) are uniformly applied to the substrate to form the cathode electrode. AT11 refers to a ceramic coating; the AT11 coating is added to both sides of the film area in the lithium battery cathode coating, serving as insulation between the cathode and the anode electrode during subsequent assembly. The consistency of the insulating coating thickness affects the manufacturing quality and product safety of subsequent processes; too much or too little thickness can lead to quality problems in later processes. Therefore, it is necessary to inspect the thickness of the insulating coating area during the coating process.

[0003] However, the relevant electrode coating thickness detection method usually involves collecting the last part of each electrode roll and obtaining the thickness using an offline thickness gauge. This is not online real-time monitoring and cannot reflect the thickness variation of an entire roll. Summary of the Invention

[0004] In view of the above problems, the present invention provides a coating equipment and an electrode coating thickness detection method, which aims to solve the problem that the relevant electrode coating thickness detection methods usually collect the electrode from the last part of each electrode roll and obtain the thickness through an offline thickness gauge, which is not online real-time monitoring and cannot reflect the thickness change of a roll.

[0005] In a first aspect, the present invention provides a coating apparatus, the coating apparatus comprising: a host computer and an X-ray transceiver mechanism;

[0006] The X-ray transceiver mechanism is used to move along the width direction of the electrode sheet while the electrode sheet is traveling, to emit incident X-rays toward the electrode sheet, and to receive the outgoing X-rays corresponding to the incident X-rays after they pass through the electrode sheet.

[0007] The host computer is used to acquire the incident intensity of the incident ray and the emission intensity dataset of the emitted ray on the electrode, and to acquire the position information of the insulating coating area on the electrode; to determine the position index based on the position information and the acquisition position of each emission intensity data in the emission intensity dataset; to acquire the regional emission intensity of the emitted ray in the insulating coating area of ​​the electrode from the emission intensity dataset based on the position index, and to determine the ray intensity attenuation information based on the incident intensity and the regional emission intensity;

[0008] The host computer is also used to determine the thickness of the insulating coating area based on the radiation intensity attenuation information, wherein the radiation intensity attenuation information is the attenuation information of the radiation intensity of the emitted radiation in the region of the insulating coating area relative to the incident radiation intensity, and the insulating coating area is disposed on both sides of the film area of ​​the electrode sheet.

[0009] In the technical solution of this invention, by setting up a ray transceiver mechanism, the mechanism moves along the width direction of the electrode sheet while the electrode sheet is being transported, emitting incident rays towards the electrode sheet and receiving the corresponding outgoing rays after the incident rays pass through the electrode sheet. Based on the principle of ray attenuation, the thickness of the insulating coating is detected, thereby enabling real-time detection of the thickness of the insulating coating area of ​​the electrode sheet. It can also detect the thickness of the insulating coating area at different positions on the electrode sheet roll. Furthermore, this invention first obtains the position information of the insulating coating area on the electrode sheet, then determines the position index based on the position information and the acquisition position of each outgoing intensity data in the outgoing intensity dataset, and then obtains the regional outgoing intensity of the outgoing rays in the insulating coating area of ​​the electrode sheet from the outgoing intensity dataset based on the position index. This provides a direct basis for quickly locating the target data segment and ensures the targeting of data extraction.

[0010] In some embodiments, the X-ray transceiver mechanism includes: a X-ray emitter, a X-ray receiver, a first slide rail, and a second slide rail, wherein the first slide rail and the second slide rail are arranged parallel to each other, the X-ray emitter is mounted on the first slide rail, and the X-ray receiver is mounted on the second slide rail;

[0011] The first slide rail is used to drive the ray emitter to move along the width direction of the electrode when the electrode is traveling;

[0012] The second slide rail is used to drive the radiation receiver to move synchronously with the radiation emitter along the width direction of the electrode when the electrode is traveling.

[0013] The ray emitter is used to emit incident rays toward the electrode when it moves along the width direction of the electrode;

[0014] The radiation receiver is used to receive the outgoing radiation corresponding to the incident radiation after it passes through the pole piece when it moves synchronously with the radiation emitter along the width direction of the pole piece.

[0015] In the technical solution of this invention embodiment, the X-ray transceiver mechanism includes an X-ray emitter, an X-ray receiver, a first slide rail, and a second slide rail. The first slide rail and the second slide rail are arranged parallel to each other. The X-ray emitter and the X-ray receiver are respectively mounted on the first slide rail and the second slide rail. The first slide rail and the second slide rail are respectively used to drive the X-ray emitter and the X-ray receiver to move synchronously along the width direction of the electrode sheet, thereby enabling full coverage scanning in the width direction of the electrode sheet and ensuring that the data covers the entire roll of electrode sheet.

[0016] In some embodiments, the X-ray transceiver mechanism further includes a belt-carrying mechanism for assisting and / or driving the electrode sheet belt-carrying mechanism.

[0017] In the technical solution of this invention embodiment, the X-ray transceiver mechanism also includes a conveyor belt mechanism, which is used to assist and / or drive the electrode sheet to move the conveyor belt, thereby ensuring the accuracy of the X-ray data acquisition position in the insulating coating area and improving the reliability of thickness calculation.

[0018] In some embodiments, the X-ray transceiver mechanism further includes: a tensioning mechanism corresponding to the belt transport mechanism; the tensioning mechanism is used to tension the electrode sheet when the belt transport mechanism drives the electrode sheet to travel.

[0019] In the technical solution of this invention embodiment, the X-ray transceiver mechanism also includes a tensioning mechanism corresponding to the belt conveyor mechanism; the tensioning mechanism tensions the electrode sheet while the belt conveyor mechanism drives the electrode sheet to move, thereby preventing wrinkles and loosening of the electrode sheet during the belt conveyor process, ensuring that the path of the X-ray emitted by the X-ray emitter is always vertical and uniform when passing through the electrode sheet, and improving the accuracy of electrode sheet coating thickness detection.

[0020] In some embodiments, the coating apparatus further includes a coating mechanism and a drying mechanism, wherein the coating mechanism, the drying mechanism, and the X-ray transceiver mechanism are arranged sequentially according to the electrode tape travel direction;

[0021] The coating mechanism is used to coat the electrode sheet;

[0022] The drying mechanism is used to dry the coated electrode sheet;

[0023] The X-ray transceiver mechanism is used to detect the thickness of the insulating coating area of ​​the dried electrode sheet.

[0024] In the technical solution of this invention embodiment, the coating equipment further includes: a coating mechanism and a drying mechanism. The coating mechanism coats the electrode sheet, and the drying mechanism dries the coated electrode sheet. The X-ray transceiver mechanism detects the thickness of the insulating coating area of ​​the dried electrode sheet, thereby enabling immediate inspection after drying and avoiding delayed or missed inspections.

[0025] In some embodiments, the X-ray transceiver mechanism includes a first X-ray transceiver mechanism and / or a second X-ray transceiver mechanism; the coating equipment further includes: a first coating mechanism, a drying mechanism, and a second coating mechanism, wherein the first coating mechanism, the drying mechanism, the first X-ray transceiver mechanism, the second coating mechanism, and the second X-ray transceiver mechanism are arranged sequentially according to the electrode tape travel direction;

[0026] The first coating mechanism is used to coat the first surface of the electrode sheet;

[0027] The drying mechanism is used to dry the electrode sheet after the first side is coated;

[0028] The first X-ray transceiver mechanism is used to detect the thickness of the insulating coating area on the first side of the first electrode sheet after it has been dried.

[0029] The second coating mechanism is used to coat the second side of the electrode sheet after the first side has been dried;

[0030] The drying mechanism is used to dry the electrode sheet after the second side is coated;

[0031] The second X-ray transceiver is used to detect the thickness of the insulating coating area on the second side of the electrode sheet after the second side has been dried.

[0032] In the technical solution of this invention embodiment, the X-ray transceiver mechanism includes a first X-ray transceiver mechanism and / or a second X-ray transceiver mechanism; the coating equipment further includes a first coating mechanism, a drying mechanism, and a second coating mechanism. The first coating mechanism, the drying mechanism, the first X-ray transceiver mechanism, the second coating mechanism, and the second X-ray transceiver mechanism are arranged sequentially according to the electrode tape carrying direction, thereby enabling real-time detection of the entire double-sided coating process and improving the efficiency of electrode coating thickness detection.

[0033] Secondly, the present invention provides a method for detecting the thickness of an electrode coating, comprising:

[0034] Acquire radiation intensity attenuation information, wherein the radiation intensity attenuation information is the attenuation information of the radiation intensity of the emitted radiation in the region of the insulating coating area relative to the incident radiation intensity, the insulating coating area is disposed on both sides of the film area of ​​the electrode, the incident radiation is the radiation emitted towards the electrode along the width direction of the electrode when the electrode is traveling, and the emitted radiation is the radiation corresponding to the incident radiation after passing through the electrode;

[0035] The thickness of the insulating coating region is determined based on the radiation intensity attenuation information;

[0036] The acquisition of ray intensity attenuation information includes:

[0037] The incident intensity of the incident ray and the outgoing intensity of the outgoing ray on the electrode are obtained, and the position information of the insulating coating area on the electrode is obtained.

[0038] The location index is determined based on the location information and the acquisition location of each emission intensity data in the emission intensity dataset.

[0039] Based on the location index, the regional emission intensity of the emitted ray in the insulating coating area of ​​the electrode is obtained from the emission intensity dataset, and the ray intensity attenuation information is determined based on the incident intensity and the regional emission intensity.

[0040] In the technical solution of this invention embodiment, during electrode feeding, a ray is emitted towards the electrode along the width direction of the electrode and the corresponding ray after passing through the electrode is received. The thickness of the insulating coating is detected in real time based on the principle of ray attenuation. This allows for real-time detection of the thickness of the insulating coating area of ​​the electrode and the thickness of the insulating coating area at different positions on the electrode roll. Furthermore, this invention first obtains the position information of the insulating coating area on the electrode, then determines the position index based on the position information and the acquisition position of each emission intensity data in the emission intensity dataset, and then obtains the regional emission intensity of the emitted ray in the insulating coating area of ​​the electrode from the emission intensity dataset based on the position index. This provides a direct basis for quickly locating the target data segment and ensures the targeting of data extraction.

[0041] In some embodiments, determining the thickness of the insulating coating region based on the radiation intensity attenuation information includes:

[0042] A preset thickness model is invoked, wherein the preset thickness model is obtained by pre-training based on ray intensity training data and thickness training data;

[0043] The thickness of the insulating coating area is determined based on the radiation intensity attenuation information using the preset thickness model.

[0044] In the technical solution of this invention embodiment, a preset thickness model is invoked, and the thickness of the insulating coating area is determined based on the ray intensity attenuation information, thereby further improving the accuracy of the electrode insulating coating area thickness detection.

[0045] In some embodiments, before obtaining the incident intensity of the incident ray, the method further includes:

[0046] Acquire ray intensity training data and thickness training data;

[0047] Based on the ray intensity training data and the thickness training data, the parameters of the linear regression equation are solved to determine the slope and intercept of the linear regression equation.

[0048] A preset thickness model is constructed based on the slope, the intercept, and the linear regression equation.

[0049] In the technical solution of this invention, a preset thickness model is constructed by solving the parameters of the linear regression equation based on training data, thereby reducing the training time of the model and ensuring the reliability of the model.

[0050] In some embodiments, after determining the thickness of the insulating coating region based on the ray intensity attenuation information using the preset thickness model, the method further includes:

[0051] Obtain the actual thickness of the insulating coating area, and calculate the error value based on the thickness and the actual thickness;

[0052] The preset thickness model is adjusted based on the error value to obtain the adjusted thickness model.

[0053] In the technical solution of this invention embodiment, the actual thickness of the insulating coating area is obtained, and the error value is calculated based on the thickness and the actual thickness. The preset thickness model is adjusted based on the error value to obtain the adjusted thickness model, thereby offsetting the model deviation caused by the fluctuation of the slurry characteristics of the insulating coating area and improving the accuracy of the preset thickness model.

[0054] In some embodiments, adjusting the preset thickness model based on the error range to obtain the adjusted thickness model includes:

[0055] Calculate the error range corresponding to the error value, and determine whether the error range is greater than a preset threshold;

[0056] If the error range is greater than a preset threshold, the preset thickness model is retrained to obtain an adjusted thickness model.

[0057] If the error range is less than or equal to a preset threshold, the error value is used as a compensation value to adjust the preset thickness model to obtain the adjusted thickness model.

[0058] In the technical solution of this invention, the adjustment method is distinguished by the error range. If the error range is greater than a preset threshold, the preset thickness model is retrained. If the error range is less than or equal to the preset threshold, the error value is used as a compensation value to adjust the preset thickness model. This ensures accuracy through retraining when the slurry fluctuates greatly, and allows for rapid fine-tuning through compensation when the deviation is stable, so that the model always matches the actual production conditions.

[0059] In some embodiments, obtaining the regional emission intensity of the emitted ray in the insulating coating area of ​​the electrode based on the location index from the emission intensity dataset includes:

[0060] Candidate datasets are selected from the emission intensity dataset using the location index as the data center point;

[0061] The gradient value of the candidate dataset is calculated based on the difference between the current data and the previous data in the candidate dataset;

[0062] The region type of the insulating coating area is determined based on the index value of the location index, wherein the region type includes an insulating coating area from the substrate to the film area and an insulating coating area from the film area to the substrate;

[0063] The regional emission intensity of the emitted ray in the insulating coating area of ​​the electrode is obtained from the emission intensity dataset based on the region type and the gradient value.

[0064] In the technical solution of this invention embodiment, candidate datasets are first selected from the emission intensity dataset using the location index as the data center point. Then, the regional emission intensity of the emitted rays in the insulating coating area of ​​the electrode is obtained from the emission intensity dataset based on the gradient value of the candidate dataset and the region type of the insulating coating area, thereby improving the accuracy of obtaining the regional emission intensity.

[0065] In some embodiments, obtaining the regional emission intensity of the emitted ray in the insulating coating region of the electrode from the emission intensity dataset according to the region type and the gradient value includes:

[0066] If the region type is an insulating coating region from substrate to film area, the gradient values ​​are traversed in index order, and the index corresponding to the first gradient value greater than the preset value is taken as the target index.

[0067] If the region type is an insulating coating region from the film region to the substrate, the gradient values ​​are traversed in index order, and the index corresponding to the first gradient value less than the preset value is taken as the target index.

[0068] The regional emission intensity of the emitted ray in the insulating coating area of ​​the electrode is obtained from the emission intensity dataset based on the target index.

[0069] In the technical solution of this invention embodiment, if the region type is an insulating coating region from the substrate to the film region, the index corresponding to the first gradient value greater than a preset value is used as the target index; if the region type is an insulating coating region from the film region to the substrate, the index corresponding to the first gradient value less than a preset value is used as the target index; based on the target index, the regional emission intensity of the emitted rays in the insulating coating region of the electrode is obtained from the emission intensity dataset, thereby further improving the accuracy of obtaining the regional emission intensity.

[0070] In some embodiments, obtaining the regional emission intensity of the emitted ray in the insulating coating area of ​​the electrode from the emission intensity dataset based on the target index includes:

[0071] Multiple emission intensity data are selected from the emission intensity dataset based on the target index;

[0072] Calculate the average value of the plurality of emission intensity data, and use the average value as the regional emission intensity of the emitted ray in the insulating coating area of ​​the electrode.

[0073] In the technical solution of this invention embodiment, multiple emission intensity data are selected from the emission intensity dataset based on the target index; the average value of the multiple emission intensity data is calculated, and the average value is used as the regional emission intensity of the emitted ray in the insulating coating area of ​​the electrode, thereby avoiding low detection accuracy caused by fluctuations in single data points and improving the detection accuracy of regional emission intensity.

[0074] The above description is merely an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention and to implement it in accordance with the contents of the specification, and in order to make the above and other objects, features and advantages of the present invention more apparent and understandable, specific embodiments of the present invention are described below. Attached Figure Description

[0075] Figure 1 This is a structural diagram of a coating apparatus according to some embodiments of the present invention;

[0076] Figure 2 These are schematic diagrams of electrode sheets according to some embodiments of the present invention;

[0077] Figure 3 This is a structural diagram of a coating apparatus according to some embodiments of the present invention;

[0078] Figure 4 This is a structural diagram of a coating apparatus according to some embodiments of the present invention;

[0079] Figure 5 This is a structural diagram of a coating apparatus according to some embodiments of the present invention;

[0080] Figure 6 This is a structural diagram of a coating apparatus according to some embodiments of the present invention;

[0081] Figure 7 This is a structural diagram of a coating apparatus according to some embodiments of the present invention;

[0082] Figure 8 This is a flowchart of an electrode coating thickness detection method according to some embodiments of the present invention;

[0083] Figure 9This is a flowchart of an electrode coating thickness detection method according to some embodiments of the present invention;

[0084] Figure 10 This is a flowchart of an electrode coating thickness detection method according to some embodiments of the present invention;

[0085] Figure 11 This is a flowchart of an electrode coating thickness detection method according to some embodiments of the present invention;

[0086] Figure 12 This is a flowchart of an electrode coating thickness detection method according to some embodiments of the present invention;

[0087] Figure 13 This is a flowchart of an electrode coating thickness detection method according to some embodiments of the present invention;

[0088] Figure 14 These are ray data diagrams of some embodiments of the present invention;

[0089] Figure 15 This is a software architecture diagram of some embodiments of the present invention.

[0090] The reference numerals in the detailed embodiments are as follows:

[0091] Electrode 10, substrate 11, film area 12, insulating coating area 13, host computer 20, X-ray transceiver mechanism 30, X-ray emitter 31, X-ray receiver 32, first slide rail 33, second slide rail 34, conveyor belt mechanism 35, tensioning mechanism 36, coating mechanism 40, drying mechanism 50, first coating mechanism 60, first X-ray transceiver mechanism 70, second coating mechanism 80, and second X-ray transceiver mechanism 90. Detailed Implementation

[0092] The embodiments of the technical solution of the present invention will now be described in detail with reference to the accompanying drawings. These embodiments are merely illustrative of the technical solution of the present invention and are therefore intended to limit the scope of protection of the present invention.

[0093] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the invention; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the invention, are intended to cover non-exclusive inclusion.

[0094] In the description of the embodiments of this invention, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this invention, "multiple" means two or more, unless otherwise explicitly defined.

[0095] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of the invention. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0096] In the description of the embodiments of this invention, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0097] In the description of the embodiments of the present invention, the term "multiple" refers to two or more (including two), similarly, "multiple groups" refers to two or more (including two groups), and "multiple pieces" refers to two or more (including two pieces).

[0098] In the description of the embodiments of the present invention, the technical terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of the present invention.

[0099] In the description of the embodiments of this invention, unless otherwise explicitly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this invention according to the specific circumstances. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0100] Currently, judging from market trends, battery applications are becoming increasingly widespread. Batteries are not only used in energy storage systems such as hydropower, thermal power, wind power, and solar power plants, but also extensively in electric vehicles such as electric bicycles, electric motorcycles, and electric cars, as well as in military equipment and aerospace. With the continuous expansion of battery applications, market demand is also constantly increasing.

[0101] In the lithium-ion battery cathode coating process, cathode slurry and an insulating coating (such as AT11 ceramic) are uniformly applied to the substrate to form the cathode electrode. AT11 refers to a ceramic coating; the AT11 coating added to both sides of the film area in the lithium-ion battery cathode coating serves as insulation between the cathode and the anode electrode during subsequent assembly. The consistency of the insulating coating thickness affects the manufacturing quality and product safety of subsequent processes; too much or too little thickness can lead to quality problems in later stages. Therefore, the thickness of the insulating coating area needs to be monitored during the coating process.

[0102] However, the relevant electrode coating thickness detection method usually involves collecting the last part of each electrode roll and obtaining the thickness using an offline thickness gauge. This is not online real-time monitoring and cannot reflect the thickness variation of an entire roll.

[0103] To address the issue that conventional electrode coating thickness detection methods typically involve collecting the last portion of each electrode roll using an offline thickness gauge, which is not real-time and fails to reflect thickness variations across the entire roll, a new X-ray transceiver mechanism can be implemented. This mechanism moves along the width of the electrode during its conveyor belt movement, emitting incident X-rays towards the electrode and receiving the corresponding outgoing X-rays after they pass through it. Based on the principle of X-ray attenuation, the insulation coating thickness can be detected in real time. Furthermore, it can detect the insulation coating thickness at different locations within the electrode roll.

[0104] In some embodiments, a coating apparatus is provided, comprising: a host computer and a radiation transceiver mechanism; the radiation transceiver mechanism is configured to move along the width direction of the electrode sheet while the electrode sheet is traveling, emit incident radiation toward the electrode sheet, and receive the outgoing radiation corresponding to the incident radiation after it passes through the electrode sheet; the host computer is configured to determine the thickness of the insulating coating area based on radiation intensity attenuation information, wherein the radiation intensity attenuation information is the attenuation information of the outgoing radiation intensity in the region of the insulating coating area relative to the incident radiation intensity, and the insulating coating area is disposed on both sides of the film area of ​​the electrode sheet.

[0105] For ease of understanding, please refer to Figure 1 and Figure 2 This explanation is provided, but does not limit the scope of this application. Figure 1 The following are structural diagrams of coating equipment according to some embodiments of the present invention. Figure 2 This is a schematic diagram of electrode sheets according to some embodiments of the present invention. As an example, such as... Figure 1 As shown, the coating equipment includes a host computer 20 and an X-ray transceiver mechanism 30. The host computer 20 refers to a computer device within the coating equipment responsible for monitoring, data processing, human-computer interaction, and communication with the X-ray transceiver mechanism / algorithm service. It has functions such as acquiring X-ray data, calling algorithm models, calculating the thickness of the insulating coating area, and saving thickness data (writing to CSV or Excel). The X-ray transceiver mechanism 30 can be an X-ray device, or other types of X-ray equipment; this embodiment does not limit this. The X-ray transceiver mechanism 30 emits incident X-rays of a fixed intensity, receives the outgoing X-rays after passing through the electrode 10, and can move along the width direction of the electrode, scanning and covering all areas in the width direction of the electrode. The electrode conveyor refers to the continuous movement process in the lithium battery coating process, where the electrode 10 (formed after the substrate is coated with cathode slurry and an insulating coating) passes through a roller at a set speed (determined by coating process parameters), enters the X-ray transceiver mechanism 30 from the oven, and finally reaches the winding mechanism. This is a prerequisite for X-ray scanning and inspection. The electrode width direction can refer to the direction perpendicular to the belt transport direction on the electrode plane. This is the scanning direction of the X-ray transceiver 30, which scans and covers all areas in this direction to ensure complete X-ray data is acquired along the electrode width direction. The incident X-ray can refer to the X-ray emitted by the X-ray transceiver 30, which has a fixed intensity and serves as the benchmark for subsequent calculations of X-ray intensity attenuation. The outgoing X-ray can refer to the X-ray captured by the X-ray transceiver 30 after the incident X-ray passes through the electrode (including the substrate, film area, and insulating coating area). Its intensity attenuates due to the material density and thickness of different areas of the electrode, resulting in different outgoing X-ray intensities in different areas.

[0106] The radiation intensity attenuation information can be the logarithm of the ratio of the incident radiation intensity to the emitted radiation intensity from the insulating coating area (the formula is...). ,in, The incident intensity of the radiation. (This refers to the emission intensity of the insulating coating area). This information is directly related to the areal density and thickness of the insulating coating area and is a key basis for calculating the thickness.

[0107] To facilitate understanding, the principle of X-ray thickness detection is explained below: After X-rays pass through a material, their intensity decreases to varying degrees depending on the material's density and thickness. The intensity of the X-rays before passing through the material is called the incident intensity, and the intensity after attenuation is called the exit intensity. The relationship between these two and the areal density is expressed by the following formula:

[0108]

[0109] in, The incident intensity of the radiation. This refers to the intensity of radiation emitted (e.g., the intensity of radiation emitted from the insulating coating area). The absorption intensity of the analyte. is the areal density.

[0110] The relationship between areal density and thickness satisfies the following formula:

[0111]

[0112] in, For surface density, The bulk density of the material, The thickness of the material.

[0113] Based on the two formulas above, the X-ray intensity and the thickness of the object being measured satisfy the following relationship:

[0114]

[0115] In the formula, It depends on the material being tested; specifically, when testing the thickness of AT11, This relates to AT11 slurry. In the coating process, for the same batch of AT11 slurry, several consecutive film rolls can be produced, which can be considered... It is a fixed value.

[0116] like Figure 2As shown, the electrode 10 consists of a substrate 11 (such as copper foil or aluminum foil), a film region 12 (the area coated with electrode paste), and an insulating coating region 13 (the coating on both sides of the film region). In a specific implementation, the electrode 10 can refer to a cathode electrode. The film region 12 can refer to the area on the electrode coated with electrode paste (such as lithium battery cathode paste), located on the substrate 11, with insulating coating regions 13 on both sides. The insulating coating region 13 can refer to the coating region located on both sides of the electrode film region 12, and its function is to insulate it from the anode electrode during subsequent assembly of the lithium battery. In a specific implementation, the insulating coating region 13 can refer to the area where the AT11 ceramic coating is located.

[0117] In practical implementation, during the electrode feeding process in the battery coating process (the electrode moves continuously across the roller at a set speed), the X-ray transceiver mechanism moves back and forth along the width of the electrode, forming a "Z"-shaped scanning trajectory (e.g., ...). Figure 2 As shown by the dotted line in the image, this process achieves a comprehensive scan of the entire roll of electrode sheets. During the scan, the X-ray transceiver continuously emits incident X-rays of a fixed intensity. As the X-rays penetrate the electrode sheet, their intensity decreases to varying degrees due to differences in material density and thickness in different areas of the electrode sheet (substrate, film area, and insulating coating area). The X-ray transceiver captures the outgoing X-rays after they pass through the electrode sheet in real time and records the outgoing X-ray intensity data at 1mm intervals along the width of the electrode sheet (one pass of data is generated for each scan of the electrode sheet). This data includes the outgoing X-ray intensity data corresponding to the insulating coating area, providing raw hardware detection data for subsequent thickness calculations.

[0118] The host computer determines the thickness of the insulating coating area in steps: First, after determining the start of coating based on information such as the conveyor speed of the coating machine and the PLC position of the coating material, the host computer establishes communication with the X-ray transceiver mechanism to collect X-ray intensity data (including incident intensity and outgoing intensity of each area) for each pass in real time. Second, the host computer converts the collected X-ray data into JSON format and uses a RESTful request to call the Python algorithm service to obtain the X-ray data extraction results for the insulating coating area, extracting the outgoing X-ray intensity data of the insulating coating area from the entire pass data. Next, the host computer obtains the X-ray intensity attenuation information returned by the algorithm service and calculates the thickness of the insulating coating area. Finally, the host computer writes the calculated insulating coating area thickness data for each scan pass into a CSV or Excel file, completing data saving and traceability.

[0119] This embodiment uses a ray transceiver mechanism to move along the width of the electrode sheet while the electrode sheet is being transported, emitting incident rays towards the electrode sheet and receiving the corresponding outgoing rays after the incident rays pass through the electrode sheet. Based on the principle of ray attenuation, the thickness of the insulating coating is detected, thereby enabling real-time detection of the thickness of the insulating coating area of ​​the electrode sheet, and also enabling detection of the thickness of the insulating coating area at different positions on the electrode sheet roll.

[0120] In some embodiments, the X-ray transceiver mechanism includes: a X-ray emitter, a X-ray receiver, a first slide rail, and a second slide rail. The first slide rail and the second slide rail are arranged parallel to each other. The X-ray emitter is mounted on the first slide rail, and the X-ray receiver is mounted on the second slide rail. The first slide rail is used to drive the X-ray emitter to move along the width direction of the electrode sheet when the electrode sheet is moving. The second slide rail is used to drive the X-ray receiver to move synchronously with the X-ray emitter along the width direction of the electrode sheet when the electrode sheet is moving. The X-ray emitter is used to emit incident X-rays towards the electrode sheet when moving along the width direction of the electrode sheet. The X-ray receiver is used to receive the outgoing X-rays corresponding to the incident X-rays after they pass through the electrode sheet when moving synchronously with the X-ray emitter along the width direction of the electrode sheet.

[0121] To achieve full coverage scanning along the width of the electrode sheet and ensure data coverage of the entire roll of electrode sheet, in this embodiment, the X-ray transceiver mechanism includes: an X-ray emitter, an X-ray receiver, a first slide rail, and a second slide rail. The first slide rail and the second slide rail are arranged parallel to each other. The X-ray emitter and the X-ray receiver are respectively mounted on the first slide rail and the second slide rail. The first slide rail and the second slide rail are respectively used to drive the X-ray emitter and the X-ray receiver to move synchronously along the width of the electrode sheet.

[0122] For ease of understanding, please refer to Figure 3 This explanation is provided, but does not limit the scope of this application. Figure 3 This is a structural diagram of a coating apparatus according to some embodiments of the present invention. As an example, such as... Figure 3 As shown, the X-ray transceiver mechanism 30 includes: an X-ray emitter 31, an X-ray receiver 32, a first slide rail 33, and a second slide rail 34. The first slide rail 33 and the second slide rail 34 are arranged parallel to each other. The X-ray emitter 31 is mounted on the first slide rail 33, and the X-ray receiver 32 is mounted on the second slide rail 34.

[0123] The X-ray emitter, mounted on a first slide rail, is the component in the X-ray transceiver mechanism responsible for emitting X-rays. During operation, it continuously emits incident rays at a fixed intensity, which then penetrate the electrode to form outgoing rays. The X-ray receiver, mounted on a second slide rail, is the component in the X-ray transceiver mechanism responsible for receiving the outgoing rays. It moves synchronously with the X-ray emitter, capturing the outgoing rays after they pass through the electrode in real time and recording the intensity value. The first slide rail, parallel to and opposite to the second slide rail, supports and drives the X-ray emitter. As the electrode travels, it moves back and forth along the width of the electrode, ensuring the X-ray emitter can scan and cover the entire area of ​​the electrode width. The second slide rail, parallel to and opposite to the first slide rail, moves in perfect synchronization with it, ensuring the receiver accurately receives the outgoing rays emitted by the X-ray emitter at the corresponding position and after penetrating the electrode, avoiding data deviations caused by misalignment.

[0124] In the specific implementation, the first and second slide rails are arranged parallel to each other. The X-ray emitter is fixed on the first slide rail, and the X-ray receiver is correspondingly installed on the second slide rail, ensuring that the emission / reception paths of the emitter and receiver are aligned and without positional deviation. The electrode belt path passes through the detection area between the two slide rails and is assisted by rollers to ensure smooth electrode belt movement. When the coating process starts and the electrode belt moves at a set speed, the first slide rail drives the X-ray emitter to move back and forth along the width of the electrode, while the second slide rail drives the X-ray receiver to maintain a completely synchronized movement rhythm with the emitter (same speed, same direction, same start and stop timing), forming a "Z"-shaped scanning trajectory (e.g., ...). Figure 2 (As shown by the dotted line in the image), ensuring that the scan covers every position of the entire roll of electrode sheet. During the scanning process, the X-ray emitter continuously emits incident X-rays of a fixed intensity onto the electrode sheet. As the X-rays penetrate the electrode sheet, their intensity decreases to varying degrees due to differences in the material density and thickness of the AT11 coating, film area, and substrate. The X-ray receiver, which moves synchronously with the emitter, captures the emitted X-rays at the corresponding positions in real time and records the emitted X-ray intensity value at every 1mm position along the width of the electrode sheet (generating "one pass of data" after each width scan). This data contains the emitted X-ray intensity information of the AT11 area, providing raw hardware data support for the subsequent calculation of the AT11 thickness by the host computer.

[0125] The X-ray transceiver mechanism of this embodiment includes: an X-ray emitter, an X-ray receiver, a first slide rail, and a second slide rail. The first slide rail and the second slide rail are arranged parallel to each other. The X-ray emitter and the X-ray receiver are respectively mounted on the first slide rail and the second slide rail. The first slide rail and the second slide rail are respectively used to drive the X-ray emitter and the X-ray receiver to move synchronously along the width direction of the electrode sheet, thereby enabling full coverage scanning in the width direction of the electrode sheet and ensuring that the data covers the entire roll of electrode sheet.

[0126] In some embodiments, the X-ray transceiver mechanism further includes a belt-carrying mechanism for assisting and / or driving the electrode sheet belt-carrying mechanism.

[0127] To provide stable tape transport conditions for synchronous scanning of the X-ray emitter and receiver, avoid deviations in detection data due to uneven electrode tension or misalignment, ensure accurate X-ray data acquisition positions in the insulating coating area, and improve the reliability of thickness calculation, this embodiment of the X-ray transceiver mechanism further includes: a tape transport mechanism, used to assist and / or drive the electrode tape transport.

[0128] For ease of understanding, please refer to Figure 4 This explanation is provided, but does not limit the scope of this application. Figure 4 This is a structural diagram of a coating apparatus according to some embodiments of the present invention. As an example, such as... Figure 4 As shown, the X-ray transceiver mechanism also includes a belt transport mechanism 35, which is arranged parallel to the first slide rail 33 and the second slide rail 34. The belt transport mechanism 35 is used to assist and / or drive the electrode 10 to move the belt. In specific implementations, the belt transport mechanism 35 can be a guide roller or a drive roller; this embodiment does not limit this. "Assist" can refer to ensuring the smooth movement of the electrode through methods such as guide roller support, preventing wrinkling or displacement; "drive" refers to actively controlling the belt speed of the electrode through methods such as drive rollers to match the X-ray scanning rhythm.

[0129] The X-ray transceiver mechanism in this embodiment also includes a conveyor belt mechanism, which is used to assist and / or drive the electrode sheet to move the conveyor belt, thereby ensuring the accuracy of the X-ray data acquisition position in the insulating coating area and improving the reliability of thickness calculation.

[0130] In some embodiments, the X-ray transceiver mechanism further includes: a tensioning mechanism corresponding to the belt transport mechanism; the tensioning mechanism is used to tension the electrode sheet when the belt transport mechanism drives the electrode sheet to travel.

[0131] To prevent wrinkles and loosening of the electrode sheet during the conveyor belt process (such as the slight wrinkles that may occur due to temperature shrinkage of the electrode sheet at the oven outlet), and to ensure that the path of the X-ray emitted by the X-ray emitter is always vertical and uniform when passing through the electrode sheet, so that wrinkles do not cause different attenuation at the same insulating coating area, thereby improving the accuracy of electrode sheet coating thickness detection, in this embodiment, the X-ray transceiver mechanism also includes a tensioning mechanism corresponding to the conveyor belt mechanism; the tensioning mechanism tensions the electrode sheet while the conveyor belt mechanism drives the electrode sheet to move.

[0132] For ease of understanding, please refer to Figure 5 This explanation is provided, but does not limit the scope of this application. Figure 5 This is a structural diagram of a coating apparatus according to some embodiments of the present invention. As an example, such as... Figure 5 As shown, the X-ray transceiver mechanism 30 also includes a tensioning mechanism 36 corresponding to the belt conveyor mechanism 35. The tensioning mechanism 36 can refer to the core tension control component in the X-ray transceiver mechanism 30 that is matched with the belt conveyor mechanism 35. Its core function is to monitor and adjust the tension of the electrode in real time when the belt conveyor mechanism drives the electrode to move along the length direction, so as to keep the electrode in a flat and taut state.

[0133] In a specific implementation, the conveyor belt mechanism may include an adjusting roller, which is parallel to and spaced apart from the feed roller of the conveyor belt mechanism (e.g., an adjusting roller is added between the feed end and the detection area of ​​the conveyor belt mechanism). A tension sensor is installed on the bearing end of the adjusting roller or the feed roller to collect the tension value when the electrode contacts the roller shaft in real time (e.g., a tension threshold of 50N is set to match the material strength of the lithium battery electrode). When the electrode is conveyed along its length in a preset direction, the electrode tension is continuously monitored: if the electrode becomes loose due to changes in the oven outlet temperature or slight fluctuations in the conveyor belt speed (tension drops to 45N), the sensor immediately feeds back the signal to the controller. The controller drives the adjusting roller to move away from the feed roller (e.g., move it downwards by 2mm), increasing the length of the electrode around the roller and the tensile force, so that the tension rises back to 50N; if the tension is too high (e.g., rising to 55N, which may cause the electrode to stretch and deform), the adjusting roller is driven to move closer to the feed roller to reduce the tensile force and maintain stable tension.

[0134] The X-ray transceiver mechanism in this embodiment also includes a tensioning mechanism corresponding to the belt conveyor mechanism. The tensioning mechanism tensions the electrode sheet while the belt conveyor mechanism is driving the electrode sheet to move, thereby preventing wrinkles and loosening of the electrode sheet during the belt conveyor process. This ensures that when the X-ray emitted by the X-ray emitter passes through the electrode sheet, the path is always vertical and uniform, and wrinkles will not cause different attenuation amounts at the same insulating coating area, thus improving the accuracy of electrode coating thickness detection.

[0135] In some embodiments, the coating equipment further includes: a coating mechanism and a drying mechanism, wherein the coating mechanism, the drying mechanism, and the X-ray transceiver mechanism are arranged sequentially according to the electrode tape carrying direction; the coating mechanism is used to coat the electrode; the drying mechanism is used to dry the coated electrode; and the X-ray transceiver mechanism is used to detect the thickness of the insulating coating area of ​​the dried electrode.

[0136] To achieve immediate inspection after drying and avoid delayed or missed inspections, in this embodiment, the coating equipment further includes a coating mechanism and a drying mechanism. The coating mechanism coats the electrode sheet, and the drying mechanism dries the coated electrode sheet. An X-ray transceiver mechanism detects the thickness of the insulating coating area of ​​the dried electrode sheet.

[0137] For ease of understanding, please refer to Figure 6 This explanation is provided, but does not limit the scope of this application. Figure 6This is a structural diagram of a coating apparatus according to some embodiments of the present invention. As an example, such as... Figure 6 As shown, the coating equipment also includes a coating mechanism 40 and a drying mechanism 50, which are arranged sequentially according to the electrode travel direction. The coating mechanism 40 is used to uniformly coat the cathode slurry onto the surface of a substrate (such as aluminum foil) to form a film area, and then coats both sides of the film area with an AT11 ceramic coating (insulating coating area), providing the electrode to be tested for subsequent thickness detection. The drying mechanism 50 is an intermediate processing device connecting the coating mechanism and the X-ray transceiver mechanism, used to heat and dry the electrode after coating, removing moisture and solvent from the slurry, allowing the AT11 coating and film area to solidify and form, ensuring stable electrode coating thickness (avoiding thickness changes caused by the flow of undried slurry), and providing a morphologically stable electrode for thickness detection. The X-ray transceiver mechanism 30 is used to perform online real-time detection of the electrode after drying, acquiring the X-ray intensity data of the AT11 insulating coating area through X-ray scanning, and then calculating the coating thickness, achieving immediate inspection after drying.

[0138] The coating equipment in this embodiment also includes a coating mechanism and a drying mechanism. The coating mechanism coats the electrode sheet, and the drying mechanism dries the coated electrode sheet. The X-ray transceiver mechanism detects the thickness of the insulating coating area of ​​the dried electrode sheet, thereby enabling immediate inspection after drying and avoiding delayed or missed inspections.

[0139] In some embodiments, the X-ray transceiver mechanism includes a first X-ray transceiver mechanism and / or a second X-ray transceiver mechanism; the coating equipment further includes: a first coating mechanism, a drying mechanism, and a second coating mechanism, wherein the first coating mechanism, the drying mechanism, the first X-ray transceiver mechanism, the second coating mechanism, and the second X-ray transceiver mechanism are arranged sequentially according to the electrode tape carrying direction; the first coating mechanism is used to coat a first side of the electrode; the drying mechanism is used to dry the electrode after coating the first side; the first X-ray transceiver mechanism is used to detect the thickness of the insulating coating area on the first side of the electrode after drying; the second coating mechanism is used to coat a second side of the electrode after drying the first side; the drying mechanism is used to dry the electrode after coating the second side; the second X-ray transceiver mechanism is used to detect the thickness of the insulating coating area on the second side of the electrode after drying the second side.

[0140] To achieve real-time detection throughout the double-sided coating process and improve the efficiency of electrode coating thickness detection, in this embodiment, the X-ray transceiver mechanism includes a first X-ray transceiver mechanism and / or a second X-ray transceiver mechanism; the coating equipment also includes a first coating mechanism, a drying mechanism, and a second coating mechanism, which are arranged sequentially according to the electrode tape travel direction.

[0141] For ease of understanding, please refer to Figure 7 This explanation is provided, but does not limit the scope of this application. Figure 7 This is a structural diagram of a coating apparatus according to some embodiments of the present invention. As an example, such as... Figure 7 As shown, the coating equipment also includes: a first coating mechanism 60, a drying mechanism 50, a first X-ray transceiver mechanism 70, a second coating mechanism 80, and a second X-ray transceiver mechanism 90 arranged sequentially along the electrode travel direction. The first coating mechanism 60 can be the front-end coating equipment in the battery double-sided coating process, positioned first along the electrode travel direction, used to uniformly coat the first side of the electrode (e.g., side A, one side of the substrate) to form a film area (cathode slurry layer) and AT11 insulating coating areas on both sides of the film area, laying the foundation for subsequent double-sided coating. The drying mechanism 50 can be composed of a multi-layer oven (e.g., a two-layer oven), which can be repeatedly used to dry the electrode after the first and second side coatings. Through stepped heating, it removes moisture and solvents from the slurry, transforming the AT11 coating from a wet film to a dry film, ensuring stable coating thickness and cured morphology. The first X-ray transceiver 70 can be an online inspection device located between the drying mechanism and the second coating mechanism. It inspects the electrode sheet after the first side is dried, accurately calculates the thickness of the AT11 insulating coating area on the first side, and pre-screens electrode sheets with substandard first-side coatings to prevent them from entering the second coating process and wasting material. The second coating mechanism 80 can be a post-coating device in the lithium battery double-sided coating process. It is located after the first X-ray transceiver 70 in the electrode sheet conveying direction and has the same structure as the first coating mechanism. Its core function is to coat the second side (e.g., side B, the other side of the substrate) of the electrode sheet that has passed the first-side drying process, simultaneously forming the film area and the AT11 insulating coating area, thus achieving complete double-sided coating generation. The second X-ray transceiver 90 can be an end-of-line inspection device located after the second side is dried. It has the same structure as the first X-ray transceiver 70, and its core function is to inspect the electrode sheet after the second side is dried, calculate the thickness of the AT11 insulating coating area on the second side, and ultimately ensure that the double-sided coatings of the electrode sheet meet the specifications.

[0142] In specific implementations, such as Figure 7 As shown, the coating process is double-sided coating. To separately detect the thickness of side A and side B, two X-ray inspection devices need to be installed. The first device is deployed between the exit of the single-sided coating oven and the side B coating area to detect the areal density of the substrate plus the side A coating. The second device is deployed between the exit of the double-sided coating oven and the winding mechanism to detect the areal density of the substrate, the side A coating, and the side B coating. Figure 5The X-ray inspection equipment includes a conveyor roller, upper and lower sliding rails, and upper and lower X-ray devices. The X-ray devices are centered on the sliding rails, which move the X-ray devices synchronously. During coating production, the electrode sheets exiting the oven pass through the conveyor roller at a certain conveyor speed and enter the X-ray inspection equipment. Simultaneously, the upper and lower sliding rails drive the X-ray devices to move back and forth along the width of the electrode sheet, scanning the entire electrode sheet. The actual scanning trajectory is Z-shaped, such as... Figure 2 As shown.

[0143] During scanning, the X-ray emitter emits rays at a fixed intensity, and the X-ray receiver continuously receives the rays after they have been absorbed by the electrodes. Each scan of the electrodes records one pass of data. Each pass of data includes the intensity value of the rays received by the X-ray receiver at 1 mm intervals along the width of the electrodes.

[0144] In this embodiment, the X-ray transceiver mechanism includes a first X-ray transceiver mechanism and / or a second X-ray transceiver mechanism; the coating equipment also includes a first coating mechanism, a drying mechanism, and a second coating mechanism. The first coating mechanism, the drying mechanism, the first X-ray transceiver mechanism, the second coating mechanism, and the second X-ray transceiver mechanism are arranged sequentially according to the electrode tape carrying direction, thereby enabling real-time detection of the entire double-sided coating process and improving the efficiency of electrode coating thickness detection.

[0145] In some embodiments, such as Figure 8 As shown, a method for detecting electrode coating thickness is proposed, including:

[0146] Step S10: Obtain radiation intensity attenuation information, wherein the radiation intensity attenuation information is the attenuation information of the radiation intensity of the emitted radiation in the region of the insulating coating area relative to the incident radiation intensity, the insulating coating area is disposed on both sides of the film area of ​​the electrode, the incident radiation is the radiation emitted towards the electrode along the width direction of the electrode when the electrode is traveling, and the emitted radiation is the radiation corresponding to the incident radiation after passing through the electrode.

[0147] Step S20: Determine the thickness of the insulating coating area based on the radiation intensity attenuation information.

[0148] In this embodiment, the electrode coating thickness detection method can be applied to a coating equipment, which includes a host computer and a radiation transceiver mechanism. The radiation transceiver mechanism is used to move along the width direction of the electrode while the electrode is traveling, emit incident radiation towards the electrode, and receive the outgoing radiation corresponding to the incident radiation after it passes through the electrode. The host computer is used to acquire radiation intensity attenuation information and determine the thickness of the insulating coating area based on the radiation intensity attenuation information. The radiation intensity attenuation information is the attenuation information of the outgoing radiation intensity in the region of the insulating coating area relative to the incident radiation intensity. The insulating coating area is disposed on both sides of the film area of ​​the electrode.

[0149] For ease of understanding, please refer to Figure 1 and Figure 2 This explanation is provided, but does not limit the scope of this application. Figure 1 The following are structural diagrams of coating equipment according to some embodiments of the present invention. Figure 2 This is a schematic diagram of electrode sheets according to some embodiments of the present invention. As an example, such as... Figure 1 As shown, the coating equipment includes a host computer 20 and an X-ray transceiver mechanism 30. The host computer 20 refers to a computer device within the coating equipment responsible for monitoring, data processing, human-computer interaction, and communication with the X-ray transceiver mechanism / algorithm service. It has functions such as acquiring X-ray data, calling algorithm models, calculating the thickness of the insulating coating area, and saving thickness data (writing to CSV or Excel). The X-ray transceiver mechanism 30 can be an X-ray device, or other types of X-ray equipment; this embodiment does not limit this. The X-ray transceiver mechanism 30 emits incident X-rays of a fixed intensity, receives the outgoing X-rays after passing through the electrode 10, and can move along the width direction of the electrode, scanning and covering all areas in the width direction of the electrode. The electrode conveyor refers to the continuous movement process in the lithium battery coating process, where the electrode 10 (formed after the substrate is coated with cathode slurry and an insulating coating) passes through a roller at a set speed (determined by coating process parameters), enters the X-ray transceiver mechanism 30 from the oven, and finally reaches the winding mechanism. This is a prerequisite for X-ray scanning and inspection. The electrode width direction can refer to the direction perpendicular to the belt transport direction on the electrode plane. This is the scanning direction of the X-ray transceiver 30, which scans and covers all areas in this direction to ensure complete X-ray data is acquired along the electrode width direction. The incident X-ray can refer to the X-ray emitted by the X-ray transceiver 30, which has a fixed intensity and serves as the benchmark for subsequent calculations of X-ray intensity attenuation. The outgoing X-ray can refer to the X-ray captured by the X-ray transceiver 30 after the incident X-ray passes through the electrode (including the substrate, film area, and insulating coating area). Its intensity attenuates due to the material density and thickness of different areas of the electrode, resulting in different outgoing X-ray intensities in different areas.

[0150] The radiation intensity attenuation information can be the logarithm of the ratio of the incident radiation intensity to the emitted radiation intensity from the insulating coating area (the formula is...). ,in, The incident intensity of the radiation. (This refers to the emission intensity of the insulating coating area). This information is directly related to the areal density and thickness of the insulating coating area and is a key basis for calculating the thickness.

[0151] To facilitate understanding, the principle of X-ray thickness detection is explained below: After X-rays pass through a material, their intensity decreases to varying degrees depending on the material's density and thickness. The intensity of the X-rays before passing through the material is called the incident intensity, and the intensity after attenuation is called the exit intensity. The relationship between these two and the areal density is expressed by the following formula:

[0152]

[0153] in, The incident intensity of the radiation. This refers to the intensity of radiation emitted (e.g., the intensity of radiation emitted from the insulating coating area). The absorption intensity of the analyte. is the areal density.

[0154] The relationship between areal density and thickness satisfies the following formula:

[0155]

[0156] in, For surface density, The bulk density of the material, The thickness of the material.

[0157] Based on the two formulas above, the X-ray intensity and the thickness of the object being measured satisfy the following relationship:

[0158]

[0159] In the formula, It depends on the material being tested; specifically, when testing the thickness of AT11, This relates to AT11 slurry. In the coating process, for the same batch of AT11 slurry, several consecutive film rolls can be produced, which can be considered... It is a fixed value.

[0160] like Figure 2As shown, the electrode 10 consists of a substrate 11 (such as copper foil or aluminum foil), a film region 12 (the area coated with electrode paste), and an insulating coating region 13 (the coating on both sides of the film region). In a specific implementation, the electrode 10 can refer to a cathode electrode. The film region 12 can refer to the area on the electrode coated with electrode paste (such as lithium battery cathode paste), located on the substrate 11, with insulating coating regions 13 on both sides. The insulating coating region 13 can refer to the coating region located on both sides of the electrode film region 12, and its function is to insulate it from the anode electrode during subsequent assembly of the lithium battery. In a specific implementation, the insulating coating region 13 can refer to the area where the AT11 ceramic coating is located.

[0161] In practical implementation, during the electrode feeding process in the battery coating process (the electrode moves continuously across the roller at a set speed), the X-ray transceiver mechanism moves back and forth along the width of the electrode, forming a "Z"-shaped scanning trajectory (e.g., ...). Figure 2 As shown by the dotted line in the image, this process achieves a comprehensive scan of the entire roll of electrode sheets. During the scan, the X-ray transceiver continuously emits incident X-rays of a fixed intensity. As the X-rays penetrate the electrode sheet, their intensity decreases to varying degrees due to differences in material density and thickness in different areas of the electrode sheet (substrate, film area, and insulating coating area). The X-ray transceiver captures the outgoing X-rays after they pass through the electrode sheet in real time and records the outgoing X-ray intensity data at 1mm intervals along the width of the electrode sheet (one pass of data is generated for each scan of the electrode sheet). This data includes the outgoing X-ray intensity data corresponding to the insulating coating area, providing raw hardware detection data for subsequent thickness calculations.

[0162] The host computer determines the thickness of the insulating coating area in steps: First, after determining the start of coating based on information such as the conveyor speed of the coating machine and the PLC position of the coating material, the host computer establishes communication with the X-ray transceiver mechanism to collect X-ray intensity data (including incident intensity and outgoing intensity of each area) for each pass in real time. Second, the host computer converts the collected X-ray data into JSON format and uses a RESTful request to call the Python algorithm service to obtain the X-ray data extraction results for the insulating coating area, extracting the outgoing X-ray intensity data of the insulating coating area from the entire pass data. Next, the host computer obtains the X-ray intensity attenuation information returned by the algorithm service and calculates the thickness of the insulating coating area. Finally, the host computer writes the calculated insulating coating area thickness data for each scan pass into a CSV or Excel file, completing data saving and traceability.

[0163] In this embodiment, when the electrode is being transported, a ray is emitted towards the electrode along the width direction of the electrode and the corresponding ray after passing through the electrode is received. Based on the principle of ray attenuation, the thickness of the insulating coating is detected in real time. This allows for real-time detection of the thickness of the insulating coating area of ​​the electrode and also the detection of the thickness of the insulating coating area at different positions on the electrode roll.

[0164] In some embodiments, such as Figure 9 As shown, step S20 includes:

[0165] Step S201: Call the preset thickness model, wherein the preset thickness model is obtained by pre-training based on ray intensity training data and thickness training data.

[0166] Step S202: Determine the thickness of the insulating coating area based on the radiation intensity attenuation information using the preset thickness model.

[0167] To further improve the accuracy of electrode insulation coating thickness detection, in this embodiment, a preset thickness model is invoked, and the thickness of the insulation coating area is determined based on the ray intensity attenuation information.

[0168] The radiation intensity attenuation information can be the logarithm of the ratio of the incident radiation intensity to the emitted radiation intensity from the insulating coating area (the formula is...). ,in, The incident intensity of the radiation. The emitted intensity (for the insulating coating area) is directly related to the areal density and thickness of the insulating coating area and is a key basis for calculating the thickness. A preset thickness model can refer to a pre-built model based on the principle of X-ray thickness detection. The principle of X-ray thickness detection is as follows: After X-rays pass through a material, their intensity decreases to varying degrees depending on the material's density and thickness. The intensity of the rays before passing through the material is called the incident intensity, and the intensity after attenuation is called the emitted intensity. The relationship between these two and the areal density satisfies the following formula:

[0169]

[0170] in, The incident intensity of the radiation. This refers to the intensity of radiation emitted (e.g., the intensity of radiation emitted from the insulating coating area). The absorption intensity of the analyte. is the areal density.

[0171] The relationship between areal density and thickness satisfies the following formula:

[0172]

[0173] in, For surface density, The bulk density of the material, The thickness of the material.

[0174] Based on the two formulas above, the X-ray intensity and the thickness of the object being measured satisfy the following relationship:

[0175]

[0176] In the formula, It depends on the material being tested; specifically, when testing the thickness of AT11, This relates to AT11 slurry. In the coating process, for the same batch of AT11 slurry, several consecutive film rolls can be produced, which can be considered... It is a fixed value, and by collecting data and combining it with machine learning algorithms, the relationship between the two is fitted.

[0177] From the perspective of detection principle, ray data and thickness data have a linear relationship. Therefore, regression algorithms can be selected to fit the relationship between the two from the data to construct a preset thickness model. Regression algorithms include linear regression, support vector machine, random forest, etc. This embodiment does not limit this.

[0178] This embodiment calls a preset thickness model and determines the thickness of the insulating coating area based on the ray intensity attenuation information, thereby further improving the accuracy of electrode insulating coating area thickness detection.

[0179] In some embodiments, such as Figure 10 As shown, before step S10, the procedure further includes:

[0180] Step S01: Obtain ray intensity training data and thickness training data.

[0181] Step S02: Solve the parameters of the linear regression equation based on the ray intensity training data and the thickness training data to determine the slope and intercept of the linear regression equation.

[0182] Step S03: Construct a preset thickness model based on the slope, the intercept, and the linear regression equation.

[0183] To reduce model training time and ensure model reliability, this embodiment constructs a preset thickness model by solving the parameters of the linear regression equation based on the training data. The relationships constructed by the linear regression algorithm are as follows:

[0184]

[0185] in, The input to the algorithm, in this embodiment, is the result of taking the logarithmic function of the ratio of incident intensity to emitted intensity, i.e. . The output of the algorithm, in this embodiment, is the thickness of the AT11 region. For relationship coefficients, For the intercept, the linear regression algorithm uses gradient descent iteratively to learn the best-fitting relationship coefficients and intercept from the training data.

[0186] This embodiment constructs a preset thickness model by solving the parameters of the linear regression equation based on training data, thereby reducing the training time of the model and ensuring the reliability of the model.

[0187] In some embodiments, such as Figure 11 As shown, after step S202, the method further includes:

[0188] Step S30: Obtain the actual thickness of the insulating coating area, and calculate the error value based on the thickness and the actual thickness.

[0189] Step S40: Adjust the preset thickness model according to the error value to obtain the adjusted thickness model.

[0190] To compensate for model deviations caused by fluctuations in the slurry characteristics of the insulating coating area, this embodiment obtains the actual thickness of the insulating coating area, calculates the error value based on the actual thickness, and adjusts the preset thickness model according to the error value to obtain the adjusted thickness model. The actual thickness refers to the true thickness value of the insulating coating area measured by offline detection methods. This value must match the electrode position and ray data corresponding to the prediction of the preset thickness model and serves as the benchmark reference data for judging the model's prediction accuracy and calculating the error value. The error value refers to the difference between the actual thickness of the insulating coating area at the same electrode position and the predicted thickness output by the preset thickness model. The calculation formula is "error value = actual thickness - predicted thickness," used to quantify the model's prediction deviation. The adjusted thickness model refers to the optimized model formed after calibrating or updating the parameters of the preset thickness model based on the error value.

[0191] In this embodiment, the actual thickness of the insulating coating area is obtained, and the error value is calculated based on the thickness and the actual thickness. The preset thickness model is adjusted according to the error value to obtain the adjusted thickness model, thereby offsetting the model deviation caused by the fluctuation of the slurry characteristics in the insulating coating area and improving the accuracy of the preset thickness model.

[0192] In some embodiments, step S50 includes: calculating the error range corresponding to the error value and determining whether the error range is greater than a preset threshold; if the error range is greater than the preset threshold, retraining the preset thickness model to obtain an adjusted thickness model; if the error range is less than or equal to the preset threshold, adjusting the preset thickness model using the error value as a compensation value to obtain an adjusted thickness model.

[0193] In order to ensure accuracy through retraining when the slurry fluctuates significantly, and to make rapid fine-tuning through compensation when the deviation is stable, so that the model always matches the actual production conditions, this embodiment distinguishes the adjustment method by judging the error range. If the error range is greater than a preset threshold, the preset thickness model is retrained. If the error range is less than or equal to the preset threshold, the error value is used as the compensation value to adjust the preset thickness model.

[0194] The error range refers to the difference between the maximum and minimum error values ​​calculated from multiple representative electrode rolls (e.g., 3 rolls) during the preset thickness model calibration phase. It quantifies the dispersion of errors between different rolls, and its core function is to determine whether the error is caused by significant fluctuations in AT11 slurry characteristics (such as viscosity and bulk density). The preset threshold is a critical value pre-set according to the AT11 thickness detection accuracy requirements, used to determine whether the error range is acceptable. Retraining refers to re-executing the complete process of "training data acquisition → linear regression parameter solution → model construction" when the error range exceeds the preset threshold, to adapt to situations with significant fluctuations in AT11 slurry characteristics. Its core is to fit new parameters with new data to ensure the model matches the current slurry characteristics. The compensation value is a value used to correct the preset thickness model prediction results when the error range is less than or equal to the preset threshold. It can be the arithmetic mean of the error values ​​from multiple rolls of electrode rolls, requiring no modification to the model's core parameters (a, b), and is only used to offset the overall stability deviation of the model.

[0195] For ease of understanding, the following example is provided, but it does not limit this application. As an example, to prevent excessive changes in slurry viscosity from altering the relationship coefficient between the two, the model needs to be calibrated daily. The calibration process is as follows:

[0196] 1. Collect X-ray data from several coated rolls, and extract the data from the last three passes:

[0197] 2. For each coated roll, when rewinding, collect the last section of the electrode sheet and measure its thickness using an offline thickness gauge;

[0198] 3. Using the current inference model, the predicted thickness data is obtained based on the X-ray data;

[0199] 4. For each roll, subtract the predicted thickness data from the offline thickness measurement data to obtain the prediction model error. If the error difference between different rolls is large, it indicates that the model needs to be retrained. If the error difference between different rolls is not large, calculate the mean error and use this value as the compensation value, denoted as c. The final detected AT11 thickness is the model inference result plus the compensation value.

[0200] In the specific implementation, 1. Calculate the error range and determine whether it is greater than the preset threshold: The first step is to obtain the error value of multiple rolls of electrode sheets: Select 3 rolls of electrode sheets covering the current batch of AT11 slurry. For each roll of electrode sheet, first use the preset thickness model, based on the last 3 passes of X-ray data (incident intensity) before winding. Regional emission intensity 1) Calculate the predicted thickness; then use an offline laser thickness gauge to measure the actual thickness of the corresponding positions of these 3 rolls of electrode sheets, and calculate the average error value of each roll of electrode sheet according to "error value = actual thickness - predicted thickness" (e.g., the error values ​​of the 3 rolls are -0.003mm, 0.001mm, and -0.008mm respectively). 2) Calculate the error range: From the error values ​​of the above multiple rolls of electrode sheets, select the maximum and minimum values, and the difference between the two is the error range (e.g., the maximum value is 0.001mm, the minimum value is -0.008mm, the error range = 0.001 - (-0.008) = 0.009mm). The third step is to compare the calculated error range with the preset threshold: compare the calculated error range with the preset threshold (0.005mm) to determine the degree of error dispersion: if the error range is >0.005mm, it indicates that the error difference between different coiled electrodes is large, which may be caused by large fluctuations in the characteristics of AT11 slurry; if the error range is ≤0.005mm, it indicates that the overall error is stable, and it is only a small drift of the model or a deviation of the equipment system.

[0201] 2. When the error range exceeds a preset threshold, retrain the model to obtain an adjusted thickness model: When the judgment result indicates that the error range exceeds the threshold, follow the "retraining" procedure. The core is to fit new parameters using new data: First, recollect training data: Select the electrode sheets from the current batch of the preset roll (where the slurry characteristics have changed) and recollect training data. Second, resolve the linear regression parameters: Transform the new training data into input features x and output features y (actual thickness), and iteratively fit the linear regression equation using the gradient descent method. To obtain a new slope suitable for the current slurry. and new intercept (e.g., if a=0.8 and b=0.1 originally, after retraining) =0.82、 =0.095). The third step is to construct the adjusted thickness model: [The new parameters are used]. , Substitute the linear regression equation, synchronously update the model's data preprocessing logic (such as the calculation method of x), encapsulate it as a Python algorithm service interface, deploy it to the detection equipment, complete the model retraining, and ensure that the new model can accurately map the relationship between the ray intensity and thickness of the current slurry.

[0202] 3. When the error range is less than or equal to the preset threshold, the error value is used as a compensation value to adjust the model and obtain the adjusted thickness model:

[0203] When the judgment result is that the error range does not exceed the threshold, the compensation adjustment method is used. The core is to efficiently offset the stable deviation: First, calculate the compensation value: Take the arithmetic mean of the collected error values ​​of multiple rolls of electrode sheets (e.g., if the error values ​​of 3 rolls are -0.003mm, -0.002mm, and -0.004mm, the compensation value c = ( 0.003 0.002 0.004) / 3= (0.003mm). The second step is to integrate the compensation value into the model: No modification to the core model parameters a and b is needed; only a compensation step is added to the model's thickness calculation logic. This makes the final output thickness formula of the adjusted model change accordingly (e.g., if the original predicted value y = 0.413mm, after adding the compensation value -0.003mm, the final thickness = 0.410mm). The third step is to update the model deployment: The model with the added compensation logic is repackaged as a Python algorithm service, ensuring that the compensation value is automatically applied when the host computer calls it, completing the model adjustment. The entire process does not require collecting a large amount of new data, quickly adapting to the model's small and stable deviations.

[0204] This embodiment distinguishes the adjustment method by judging the error range. If the error range is greater than the preset threshold, the preset thickness model is retrained. If the error range is less than or equal to the preset threshold, the error value is used as the compensation value to adjust the preset thickness model. In this way, the accuracy can be guaranteed by retraining when the slurry fluctuates greatly, and the model can be quickly fine-tuned by compensation when the deviation is stable, so that the model always matches the actual production conditions.

[0205] In some embodiments, such as Figure 12 As shown, step S10 includes:

[0206] Step S101: Obtain the incident intensity of the incident ray and the outgoing intensity of the outgoing ray on the electrode.

[0207] Step S102: Obtain the regional emission intensity of the emitted rays in the insulating coating area of ​​the electrode from the emission intensity dataset.

[0208] Step S103: Determine the radiation intensity attenuation information based on the incident intensity and the outgoing intensity of the region.

[0209] To improve the accuracy of radiation intensity attenuation information, in this embodiment, the incident intensity of the incident radiation and the emission intensity of the emitted radiation on the electrode are first obtained. Then, the regional emission intensity of the emitted radiation in the insulating coating area of ​​the electrode is obtained from the emission intensity dataset. Finally, the radiation intensity attenuation information is determined based on the incident intensity and the regional emission intensity.

[0210] The incident intensity refers to the initial intensity of X-rays emitted by the X-ray emitter towards the electrode in the X-ray transceiver mechanism. It is a pre-calibrated fixed value and serves as the reference parameter for calculating X-ray intensity attenuation. The emitted intensity dataset refers to the complete set of emitted X-ray intensity data recorded for each pass of the electrode (i.e., one width-direction scan) as the X-ray receiver moves synchronously with the emitter along the width direction of the electrode. The dataset contains emitted X-ray intensity values ​​at 1mm intervals along the width direction of the electrode. The regional emitted intensity refers to the emitted X-ray intensity extracted from the emitted intensity dataset that corresponds only to the insulating coating area (AT11) of the electrode.

[0211] This embodiment first obtains the incident intensity of the incident ray and the outgoing intensity of the outgoing ray on the electrode. Then, it obtains the regional outgoing intensity of the outgoing ray in the insulating coating area of ​​the electrode from the outgoing intensity dataset. Finally, it determines the ray intensity attenuation information based on the incident intensity and the regional outgoing intensity, thereby improving the accuracy of the ray intensity attenuation information.

[0212] In some embodiments, such as Figure 13 As shown, step S102 includes:

[0213] Step S1021: Obtain the position information of the insulating coating area on the electrode.

[0214] Step S1022: Determine the location index based on the location information and the acquisition location of each emission intensity data in the emission intensity dataset.

[0215] Step S1023: Obtain the regional emission intensity of the emitted ray in the insulating coating area of ​​the electrode from the emission intensity dataset based on the location index.

[0216] To achieve a precise mapping between physical location and dataset index, the macroscopic physical location of the insulating coating area is transformed into a specific segment identifier within the dataset. This avoids the inefficiency of blindly filtering through the entire dataset and provides a direct basis for quickly locating target data segments, ensuring targeted data extraction. In this embodiment, the location information of the insulating coating area on the electrode is first obtained. Then, based on the location information and the acquisition location of each emission intensity data in the emission intensity dataset, the location index is determined. Finally, based on the location index, the regional emission intensity of the emitted rays in the insulating coating area of ​​the electrode is obtained from the emission intensity dataset.

[0217] The emitted radiation intensity dataset refers to the complete set of emitted radiation intensity data recorded each time the radiation receiver scans the electrode (i.e., completes one width-direction scan) while moving synchronously with the transmitter along the width of the electrode. The dataset contains emitted radiation intensity values ​​at 1mm intervals along the electrode width. For example... Figure 14 As shown, Figure 14The following is a line graph illustrating the radiation data from some embodiments of the present invention, showing a single data pass. This pass comprises four parts: the initial radiation intensity upon scanning into air, the radiation value upon scanning into the foil, the radiation value upon scanning into AT11, and the radiation value upon scanning into the film area. The radiation value of the AT11 region needs to be extracted from the entire data. Position information refers to a pre-defined fixed position parameter of the insulating coating area (AT11) along the electrode width direction, determined by the manufacturing process. The position of the insulating coating area differs for different electrode models, but the position remains fixed for the same model, serving as a reference for locating the target data segment. The position index refers to the identifier that maps the physical position along the electrode width direction to the data point number in the emission intensity dataset. Because the emission intensity dataset is generated according to the rule of "recording one data point every 1 mm," there is a one-to-one correspondence between the physical position (mm) and the data point number (index). The regional emission intensity refers to the emission radiation intensity value belonging only to the insulating coating area, filtered from the emission intensity dataset using the position index.

[0218] In practical implementation, when the electrode moves at a fixed speed along the conveyor belt, the slide rail drives the transmitter and receiver to move back and forth synchronously along the width of the electrode, forming a Z-shaped scanning trajectory to ensure that the entire width of the electrode is scanned. Finally, after each pass of the X-ray receiver completes a width scan (i.e., covering the entire width of the electrode), it automatically records the emitted X-ray intensity value at "every 1mm position" within that pass. The data from multiple scan passes are accumulated to form an emitted intensity dataset, which is transmitted to the host computer for storage in real time. Before electrode production, the film area width and the start / end position of the film area in the width direction of a certain type of electrode are defined through process documents, thereby determining the position of the insulating coating area (both sides of the film area), and this position information is entered into the host computer as a reference for subsequent positioning. The mapping rule between "data acquisition position" and "data index" in the emitted intensity dataset is defined: since the receiver records one intensity value every 1mm, the first data point in the dataset corresponds to 1mm in the width direction of the electrode (the starting end), and the nth data point corresponds to nmm in the width direction of the electrode. Based on the pre-acquired location information of the insulating coating area, this physical location is directly used as the location index, i.e., the location index of the insulating coating area is denoted as loc_1, loc_2. If a certain type of electrode has two film areas, then there are four corresponding location indices loc_1, loc_2, loc_3, and loc_4. These indices remain fixed for the same type of electrode and do not need to be recalculated each time. Then, the emission intensity corresponding to the location index in the emission intensity dataset is selected as the regional emission intensity of the emitted ray in the insulating coating area of ​​the electrode.

[0219] This embodiment first obtains the position information of the insulating coating area on the electrode, then determines the position index based on the position information and the acquisition position of each emission intensity data in the emission intensity dataset, and then obtains the regional emission intensity of the emitted rays in the insulating coating area of ​​the electrode from the emission intensity dataset based on the position index. This provides a direct basis for quickly locating the target data segment and ensures the targeting of data extraction.

[0220] In some embodiments, step S1023 includes: selecting a candidate dataset from the emission intensity dataset using the location index as the data center point; calculating the gradient value of the candidate dataset based on the difference between the current data and the previous data in the candidate dataset; determining the region type of the insulating coating region based on the index value of the location index, wherein the region type includes an insulating coating region from the substrate to the film region and an insulating coating region from the film region to the substrate; and obtaining the regional emission intensity of the emitted rays in the insulating coating region of the electrode from the emission intensity dataset based on the region type and the gradient value.

[0221] To improve the accuracy of regional emission intensity acquisition, in this embodiment, candidate datasets are first selected from the emission intensity dataset using the location index as the data center point. Then, the regional emission intensity of the emitted rays in the insulating coating area of ​​the electrode is obtained from the emission intensity dataset based on the gradient value of the candidate dataset and the regional type of the insulating coating area.

[0222] The data center point can be a reference point centered on the dataset point corresponding to the location index, used to determine the selection range of the candidate dataset. When selecting data, this point is used as the center, extending forward and backward by a fixed length (e.g., ±5 data points) to ensure that the candidate dataset completely includes the intensity data of the insulation coating area, while avoiding including too much data from non-target areas. The candidate dataset can be a local data segment extracted from the emission intensity dataset, with the location index as the data center point. Its purpose is to narrow the data processing range, ensuring the inclusion of data from the insulation coating area while reducing interference from non-target area data, thus improving processing efficiency. The gradient value can be the difference between the emission intensity value of the current data point and the emission intensity value of the previous data point in the candidate dataset. The region type can refer to the category of AT11 (insulating coating region), which is divided into "insulating coating region from substrate to film region" and "insulating coating region from film region to substrate region". It is determined by the position index number "i": (1) When i is odd (such as loc_1, loc_3), it is "insulating coating region from substrate to film region", and its emission intensity curve is "first decrease, then increase, then decrease again"; (2) When i is even (such as loc_2, loc_4), it is "insulating coating region from film region to substrate region", and its emission intensity curve is "first increase, then decrease, then increase again". The selection logic of the two types of regions is different due to the difference in emission intensity curves.

[0223] In the specific implementation, the data of the i-th region is extracted, val[loc_i-5, loc_i+5], denoted as val_i. val_i is iterated through, and each time a data point within val_i is subtracted from the preceding number. Finally, the gradient value grad_i of the AT11 region is obtained. The AT11 type is determined by dividing i by 2. If the division is even, then the AT11 belongs to the AT11 region from the film region to the substrate; otherwise, it belongs to the AT11 region from the substrate to the film region. Based on the region type and gradient value, the regional emission intensity of the emitted rays in the insulating coating region of the electrode is obtained from the emission intensity dataset.

[0224] In this embodiment, candidate datasets are first selected from the emission intensity dataset using the location index as the data center point. Then, the regional emission intensity of the emitted rays in the insulating coating area of ​​the electrode is obtained from the emission intensity dataset based on the gradient value of the candidate dataset and the region type of the insulating coating area, thereby improving the accuracy of obtaining the regional emission intensity.

[0225] In some embodiments, obtaining the regional emission intensity of the emitted rays in the insulating coating area of ​​the electrode from the emission intensity dataset based on the region type and the gradient value includes: if the region type is an insulating coating area from the substrate to the film region, traversing the gradient values ​​in index order, and taking the index corresponding to the first gradient value greater than a preset value as the target index; if the region type is an insulating coating area from the film region to the substrate, traversing the gradient values ​​in index order, and taking the index corresponding to the first gradient value less than a preset value as the target index; and obtaining the regional emission intensity of the emitted rays in the insulating coating area of ​​the electrode from the emission intensity dataset based on the target index.

[0226] To further improve the accuracy of obtaining the regional emission intensity, in this embodiment, if the region type is the insulating coating region from the substrate to the film region, the index corresponding to the first gradient value greater than a preset value is used as the target index; if the region type is the insulating coating region from the film region to the substrate, the index corresponding to the first gradient value less than a preset value is used as the target index; the regional emission intensity of the emitted rays in the insulating coating region of the electrode is obtained from the emission intensity dataset based on the target index.

[0227] In the specific implementation, grad_i is traversed sequentially. If it is AT11 from the membrane region to the substrate, the traversal ends at the first point with a value less than zero. If it is AT11 from the substrate to the membrane region, the traversal ends at the first point with a value greater than zero. The index dist_i of the point after the traversal is completed is recorded. The specific steps are as follows:

[0228] Region Type 1: Insulating coating area from substrate to film area (i is an odd number, the emitted intensity "first decreases, then increases, then decreases again"): (1) Traverse the gradient value sequence in the index order "from left to right" (from the edge to the center in the direction of electrode width); (2) Since the intensity of this region first "decreases" (gradient value < 0) and then "increases" (gradient value > 0), the traversal goal is to find "the first gradient value greater than the preset value (0)", which is the inflection point of the intensity from "decreasing" to "increasing" (near the valley value of the corresponding intensity curve), marking that the ray enters the AT11 core area from the substrate; (3) Record the index of this gradient value in the candidate dataset, which is "target index (dist_i)".

[0229] Region Type 2: Insulating coating area from film area to substrate (i is an even number, the emission intensity "first increases, then decreases, then increases again"): (1) Traverse the gradient value sequence in the same index order "from left to right"; (2) Since the intensity of this region first "increases" (gradient value > 0) and then "decreases" (gradient value < 0), the traversal goal is to find "the first gradient value less than the preset value (0)", which is the inflection point of the intensity from "increase" to "decrease" (near the peak of the corresponding intensity curve), marking that the ray enters the AT11 core area from the film area; (3) Record the corresponding index of the gradient value, which is "target index (dist_i)".

[0230] After obtaining the target index, the emission intensity corresponding to the target index in the emission intensity dataset can be directly used as the regional emission intensity of the emitted ray in the insulating coating area of ​​the electrode. Alternatively, multiple emission intensity data can be selected from the emission intensity dataset based on the target index. The average value of the multiple emission intensity data can be calculated and used as the regional emission intensity of the emitted ray in the insulating coating area of ​​the electrode. This embodiment does not impose any restrictions on this.

[0231] In this embodiment, if the region type is the insulating coating region from the substrate to the film region, the index corresponding to the first gradient value greater than the preset value is used as the target index; if the region type is the insulating coating region from the film region to the substrate, the index corresponding to the first gradient value less than the preset value is used as the target index; based on the target index, the regional emission intensity of the emitted rays in the insulating coating region of the electrode is obtained from the emission intensity dataset, thereby further improving the accuracy of obtaining the regional emission intensity.

[0232] In some embodiments, obtaining the regional emission intensity of the emitted ray in the insulating coating area of ​​the electrode from the emission intensity dataset based on the target index includes: selecting a plurality of emission intensity data from the emission intensity dataset based on the target index; calculating the average value of the plurality of emission intensity data; and using the average value as the regional emission intensity of the emitted ray in the insulating coating area of ​​the electrode.

[0233] To avoid low detection accuracy caused by fluctuations in a single data point, in this embodiment, multiple emission intensity data are selected from the emission intensity dataset based on the target index; the average value of the multiple emission intensity data is calculated, and the average value is used as the regional emission intensity of the emitted ray in the insulating coating area of ​​the electrode.

[0234] In the specific implementation, the AT11 region data is extracted (val_i[dist_i-1:dist_i+2)). The mean value of the AT11 region data is calculated, which is the AT11 emission intensity value detected in this scan. For each AT11, the above process is executed to obtain the regional emission intensity of each AT11 region.

[0235] This embodiment selects multiple emission intensity data from the emission intensity dataset based on the target index; calculates the average value of the multiple emission intensity data, and uses the average value as the regional emission intensity of the emitted ray in the insulating coating area of ​​the electrode, thereby avoiding low detection accuracy caused by fluctuations in single data points and improving the detection accuracy of regional emission intensity.

[0236] For ease of understanding, please refer to Figure 15 This explanation is provided, but does not limit the scope of this application. Figure 15 This is a software architecture diagram of some embodiments of the present invention. As an example, such as... Figure 15 As shown, the electrode coating thickness detection process is as follows:

[0237] 1. The host computer determines to start coating based on information such as the speed of the coating machine belt and the PLC position of the coating material;

[0238] 2. The host computer communicates with the X-ray inspection equipment to obtain the latest X-ray data;

[0239] 3. Convert a ray data set into JSON format and call the Python algorithm interface;

[0240] 4. After receiving the request, the Python algorithm server parses the request information and obtains the ray data;

[0241] 5. Extract the X-ray data for region AT11 from the entire X-ray data set;

[0242] 6. Use the pre-trained X-ray and thickness inference model to obtain the thickness of the AT11 region;

[0243] 7. The Python algorithm service will return the calculated AT11 thickness as a response to the host computer program;

[0244] 8. The host computer program parses the response from the Python service, obtains the AT11 thickness, and writes the AT11 thickness of the current pass to a CSV or Excel file.

[0245] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be covered within the scope of the claims and specification of the present invention. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. The present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A coating device, characterized in that, The coating equipment includes: a host computer and a radiation transceiver mechanism; The X-ray transceiver mechanism is used to move along the width direction of the electrode sheet while the electrode sheet is traveling, to emit incident X-rays toward the electrode sheet, and to receive the outgoing X-rays corresponding to the incident X-rays after they pass through the electrode sheet. The host computer is used to acquire the incident intensity of the incident ray and the emission intensity dataset of the emitted ray on the electrode, and to acquire the position information of the insulating coating area on the electrode; to determine the position index based on the position information and the acquisition position of each emission intensity data in the emission intensity dataset; to acquire the regional emission intensity of the emitted ray in the insulating coating area of ​​the electrode from the emission intensity dataset based on the position index, and to determine the ray intensity attenuation information based on the incident intensity and the regional emission intensity; The host computer is also used to determine the thickness of the insulating coating area based on the radiation intensity attenuation information, wherein the radiation intensity attenuation information is the attenuation information of the radiation intensity of the emitted radiation in the region of the insulating coating area relative to the incident radiation intensity, and the insulating coating area is disposed on both sides of the film area of ​​the electrode sheet. The step of obtaining the regional emission intensity of the emitted ray in the insulating coating area of ​​the electrode based on the position index from the emission intensity dataset includes: Candidate datasets are selected from the emission intensity dataset using the location index as the data center point; The gradient value of the candidate dataset is calculated based on the difference between the current data and the previous data in the candidate dataset; The region type of the insulating coating area is determined based on the index value of the location index, wherein the region type includes an insulating coating area from the substrate to the film area and an insulating coating area from the film area to the substrate; The regional emission intensity of the emitted ray in the insulating coating area of ​​the electrode is obtained from the emission intensity dataset based on the region type and the gradient value.

2. The coating equipment as described in claim 1, characterized in that, The X-ray transceiver mechanism includes: an X-ray emitter, an X-ray receiver, a first slide rail, and a second slide rail. The first slide rail and the second slide rail are arranged parallel to each other. The X-ray emitter is mounted on the first slide rail, and the X-ray receiver is mounted on the second slide rail. The first slide rail is used to drive the ray emitter to move along the width direction of the electrode when the electrode is traveling; The second slide rail is used to drive the radiation receiver to move synchronously with the radiation emitter along the width direction of the electrode when the electrode is traveling. The ray emitter is used to emit incident rays toward the electrode when it moves along the width direction of the electrode; The radiation receiver is used to receive the outgoing radiation corresponding to the incident radiation after it passes through the pole piece when it moves synchronously with the radiation emitter along the width direction of the pole piece.

3. The coating equipment as described in claim 2, characterized in that, The X-ray transceiver mechanism further includes a belt-carrying mechanism, which is used to assist and / or drive the electrode sheet to travel on the belt.

4. The coating equipment as described in claim 3, characterized in that, The X-ray transceiver mechanism further includes: a tensioning mechanism corresponding to the belt conveyor mechanism; the tensioning mechanism is used to tension the electrode sheet when the belt conveyor mechanism drives the electrode sheet to move.

5. The coating apparatus according to any one of claims 1 to 4, characterized in that, The coating equipment further includes a coating mechanism and a drying mechanism, wherein the coating mechanism, the drying mechanism, and the X-ray transceiver mechanism are arranged sequentially according to the electrode tape travel direction; The coating mechanism is used to coat the electrode sheet; The drying mechanism is used to dry the coated electrode sheet; The X-ray transceiver mechanism is used to detect the thickness of the insulating coating area of ​​the dried electrode sheet.

6. The coating apparatus according to any one of claims 1 to 4, characterized in that, The X-ray transceiver mechanism includes a first X-ray transceiver mechanism and / or a second X-ray transceiver mechanism; the coating equipment further includes a first coating mechanism, a drying mechanism, and a second coating mechanism, wherein the first coating mechanism, the drying mechanism, the first X-ray transceiver mechanism, the second coating mechanism, and the second X-ray transceiver mechanism are arranged sequentially according to the electrode tape traveling direction; The first coating mechanism is used to coat the first surface of the electrode sheet; The drying mechanism is used to dry the electrode sheet after the first side is coated; The first X-ray transceiver mechanism is used to detect the thickness of the insulating coating area on the first side of the first electrode sheet after it has been dried. The second coating mechanism is used to coat the second side of the electrode sheet after the first side has been dried; The drying mechanism is used to dry the electrode sheet after the second side is coated; The second X-ray transceiver is used to detect the thickness of the insulating coating area on the second side of the electrode sheet after the second side has been dried.

7. A method for detecting the thickness of an electrode coating, characterized in that, include: Acquire radiation intensity attenuation information, wherein the radiation intensity attenuation information is the attenuation information of the radiation intensity of the emitted radiation in the region of the insulating coating area relative to the incident radiation intensity, the insulating coating area is disposed on both sides of the film area of ​​the electrode, the incident radiation is the radiation emitted towards the electrode along the width direction of the electrode when the electrode is traveling, and the emitted radiation is the radiation corresponding to the incident radiation after passing through the electrode; The thickness of the insulating coating region is determined based on the radiation intensity attenuation information; The acquisition of ray intensity attenuation information includes: The incident intensity of the incident ray and the outgoing intensity of the outgoing ray on the electrode are obtained, and the position information of the insulating coating area on the electrode is obtained. The location index is determined based on the location information and the acquisition location of each emission intensity data in the emission intensity dataset. Based on the location index, the regional emission intensity of the emitted ray in the insulating coating area of ​​the electrode is obtained from the emission intensity dataset, and the ray intensity attenuation information is determined according to the incident intensity and the regional emission intensity. The step of obtaining the regional emission intensity of the emitted ray in the insulating coating area of ​​the electrode from the emission intensity dataset based on the location index includes: Candidate datasets are selected from the emission intensity dataset using the location index as the data center point; The gradient value of the candidate dataset is calculated based on the difference between the current data and the previous data in the candidate dataset; The region type of the insulating coating area is determined based on the index value of the location index, wherein the region type includes an insulating coating area from the substrate to the film area and an insulating coating area from the film area to the substrate; The regional emission intensity of the emitted ray in the insulating coating area of ​​the electrode is obtained from the emission intensity dataset based on the region type and the gradient value.

8. The electrode coating thickness detection method as described in claim 7, characterized in that, Determining the thickness of the insulating coating region based on the radiation intensity attenuation information includes: A preset thickness model is invoked, wherein the preset thickness model is obtained by pre-training based on ray intensity training data and thickness training data; The thickness of the insulating coating area is determined based on the radiation intensity attenuation information using the preset thickness model.

9. The electrode coating thickness detection method as described in claim 8, characterized in that, Before obtaining the radiation intensity attenuation information, the method further includes: Acquire ray intensity training data and thickness training data; Based on the ray intensity training data and the thickness training data, the parameters of the linear regression equation are solved to determine the slope and intercept of the linear regression equation. A preset thickness model is constructed based on the slope, the intercept, and the linear regression equation.

10. The electrode coating thickness detection method as described in claim 8, characterized in that, After determining the thickness of the insulating coating area based on the radiation intensity attenuation information using the preset thickness model, the method further includes: Obtain the actual thickness of the insulating coating area, and calculate the error value based on the thickness and the actual thickness; The preset thickness model is adjusted based on the error value to obtain the adjusted thickness model.

11. The electrode coating thickness detection method as described in claim 10, characterized in that, The step of adjusting the preset thickness model based on the error value to obtain the adjusted thickness model includes: Calculate the error range corresponding to the error value, and determine whether the error range is greater than a preset threshold; If the error range is greater than a preset threshold, the preset thickness model is retrained to obtain an adjusted thickness model. If the error range is less than or equal to a preset threshold, the error value is used as a compensation value to adjust the preset thickness model to obtain the adjusted thickness model.

12. The electrode coating thickness detection method as described in claim 7, characterized in that, The step of obtaining the regional emission intensity of the emitted ray in the insulating coating area of ​​the electrode from the emission intensity dataset according to the region type and the gradient value includes: If the region type is an insulating coating region from substrate to film area, the gradient values ​​are traversed in index order, and the index corresponding to the first gradient value greater than the preset value is taken as the target index. If the region type is an insulating coating region from the film region to the substrate, the gradient values ​​are traversed in index order, and the index corresponding to the first gradient value less than the preset value is taken as the target index. The regional emission intensity of the emitted ray in the insulating coating area of ​​the electrode is obtained from the emission intensity dataset based on the target index.

13. The electrode coating thickness detection method as described in claim 12, characterized in that, The step of obtaining the regional emission intensity of the emitted ray in the insulating coating area of ​​the electrode from the emission intensity dataset based on the target index includes: Multiple emission intensity data are selected from the emission intensity dataset based on the target index; Calculate the average value of the plurality of emission intensity data, and use the average value as the regional emission intensity of the emitted ray in the insulating coating area of ​​the electrode.

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