Coating method and system, computer device, and storage medium

Abstract

A coating method and system, a computer device, and a storage medium, relating to the technical field of battery production, at least solving the problem in the related art of insufficient accuracy in a non-thinned region resulting from employing an extreme value deviation algorithm for edge finding in the non-thinned region. The method comprises: acquiring coating weight data corresponding to an electrode sheet (S11), wherein the electrode sheet comprises a coating region and a blank region, and the coating region is coated with an active material layer; determining the coating region from the electrode sheet on the basis of the coating weight data and reference weight corresponding to the electrode sheet (S12), wherein the coating region comprises a thinned region and a non-thinned region, and the coating thickness of the thinned region is less than that of the non-thinned region; and determining the non-thinned region from the coating region on the basis of attribute information of the electrode sheet (S13).

Description

Coating method and system, computer device and storage medium

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This disclosure is based on and claims the priority of Chinese patent application with application number 202410202019.8, application date February 23, 2024, and invention name “Coating method and system, computer equipment and storage medium”. The entire content of this Chinese patent application is hereby introduced into this disclosure as a reference. Technical Field

[0003] The present disclosure relates to, but is not limited to, the field of battery production technology, and in particular to a coating method and system, a computer device, and a storage medium. Background Art

[0004] In the related art, the edge of the non-thinned area is basically determined from the coating weight data through the extreme value offset algorithm. However, since the thinned area in the coating area itself is not smooth, the algorithm cannot accurately process the data of the thinned area, resulting in low accuracy of the non-thinned area.

[0005] Summary of the Invention

[0006] The present disclosure provides a coating method and system, computer equipment, and storage medium that can at least address the problem of using an extreme value offset algorithm to detect the edge of a non-shaving zone in related technologies, resulting in low accuracy in the non-shaving zone. The present disclosure determines the effective non-shaving zone by using the coating weight data corresponding to the electrode piece, the reference weight corresponding to the electrode piece, and the electrode piece's attribute information, thereby improving the accuracy of the non-shaving zone.

[0007] The technical solution of the embodiment of the present disclosure is implemented as follows:

[0008] The present disclosure provides a coating method, which includes:

[0009] Obtaining coating weight data corresponding to the electrode; wherein the electrode comprises a coating area and a blank area, and the coating area is coated with an active material coating;

[0010] Determining the coating area from the electrode piece based on the coating weight data and a reference weight corresponding to the electrode piece; wherein the coating area includes a skived area and a non-skived area, and the coating thickness of the skived area is less than the coating thickness of the non-skived area;

[0011] The non-thinned area is determined from the coated area based on the property information of the pole piece.

[0012] In some embodiments, the coating area is determined from the electrode based on the coating weight data and the reference weight corresponding to the electrode, including: determining the reference weight corresponding to the electrode based on the weight of the substrate corresponding to the electrode and the weight of the coating corresponding to the electrode; updating the coating weight data based on the reference weight corresponding to the electrode to obtain updated coating weight data; and determining the coating area from the electrode based on the updated coating weight data.

[0013] In the embodiment of the present disclosure, on the one hand, the reference weight is determined by the weight of the substrate corresponding to the pole piece and the weight of the coating, thereby improving the accuracy of the reference weight determination; on the other hand, the coating area is patrolled from the coating weight data through the reference weight, thereby improving the accuracy of the coating area determination, thereby helping to determine the non-thinning area.

[0014] In some embodiments, the determining of the reference weight corresponding to the pole piece based on the weight of the substrate corresponding to the pole piece and the weight of the coating corresponding to the pole piece includes: determining the sum of the weight of the substrate and the weight of the coating; wherein the weight of the coating includes one of the following: the weight of single-sided coating, the weight of double-sided coating; and determining the reference weight corresponding to the pole piece based on the sum.

[0015] In the embodiment of the present disclosure, the reference weight is determined in real time by the sum of the weight of the substrate and the weight of the single-sided / double-sided coating, which improves the accuracy of the reference weight compared to a constant reference weight.

[0016] In some embodiments, the coating weight data includes the weight corresponding to at least one detection position in the pole piece, and the updated coating weight data includes the target weight corresponding to each of the detection positions; the coating weight data is updated based on the reference weight corresponding to the pole piece to obtain the updated coating weight data, including: for the weight corresponding to each detection position in the pole piece, based on the weight corresponding to the detection position and the reference weight corresponding to the pole piece, determining the target weight corresponding to the detection position.

[0017] In the embodiment of the present disclosure, the target weight corresponding to each detection position is determined based on the reference weight and the weight corresponding to each detection position, thereby improving the accuracy of the target weight corresponding to the detection position and thus improving the accuracy of the coating area patrol.

[0018] In some embodiments, the target weight corresponding to the detection position is determined based on the weight corresponding to the detection position and the reference weight corresponding to the pole piece, including at least one of the following: when the weight corresponding to the detection position is less than the reference weight corresponding to the pole piece, the preset weight is used as the target weight corresponding to the detection position; when the weight corresponding to the detection position is not less than the reference weight corresponding to the pole piece, the weight corresponding to the detection position is used as the target weight corresponding to the detection position.

[0019] In the embodiment of the present disclosure, the reference weight and the weight corresponding to the detection position are compared to use the preset weight or the weight corresponding to the detection position as the target weight, thereby improving the accuracy of the target weight and thus improving the accuracy of the coating area patrol.

[0020] In some embodiments, the attribute information of the pole piece includes at least one of the following: attribute information of the thinning area, attribute information of the spot area; the determining of the non-thinning area from the coating area based on the attribute information of the pole piece includes: when the attribute information of the pole piece includes the attribute information of the thinning area and the attribute information of the spot area, the area formed by translating the boundary lines on both sides of the coating area toward the middle by a first length is used as the non-thinning area; wherein the first length includes the width of the thinning area and the radius of the spot area; when the attribute information of the pole piece includes the attribute information of the thinning area, the area formed by translating the boundary lines on both sides of the coating area toward the middle by a second length is used as the non-thinning area; wherein the second length includes the width of the thinning area; when the attribute information of the pole piece includes the attribute information of the spot area, the area formed by translating the boundary lines on both sides of the coating area toward the middle by a third length is used as the non-thinning area; wherein the third length includes the radius of the spot area.

[0021] In the embodiment of the present disclosure, the non-thinned area is determined from the coating area according to the size of the preset thinned area and / or the spot area, thereby improving the accuracy of the non-thinned area.

[0022] In some embodiments, the method further includes: dividing the non-thinned area into at least one coating sub-area; and for each coating sub-area, determining partition information corresponding to the coating sub-area based on coating weight data corresponding to the coating sub-area.

[0023] In the embodiment of the present disclosure, on the one hand, the non-thinning area is divided into multiple coating sub-areas, so that the coating weight data of each sub-area is consistent with the actual partition size and position, and can truly reflect the coating weight data contained in each actual partition; on the other hand, the partition information corresponding to each sub-area is determined according to the coating weight data corresponding to each coating sub-area, thereby improving the accuracy of the partition information.

[0024] In some embodiments, the method further includes: for each coating sub-area in the non-thinning area, determining the coating quality of the coating sub-area based on the coating weight data corresponding to the coating sub-area and the partition information corresponding to the coating sub-area.

[0025] In the embodiment of the present disclosure, the coating quality of each coating sub-area is determined separately according to the coating weight data and partition information corresponding to each coating sub-area, thereby improving the accuracy of the coating quality of each sub-area. It can not only quickly and effectively locate whether there are sub-areas with quality abnormalities, thereby improving the coating production efficiency, but also reduce the possibility of outflow of electrodes with coating abnormalities, thereby ensuring the coating quality of the electrode surface in the subsequent production process of the electrode, and further ensuring the capacity, life and safety of the battery.

[0026] In some embodiments, the coating weight data corresponding to the coating sub-area includes a weight corresponding to at least one detection position, and the partition information of the coating sub-area includes an average weight; determining the coating quality of the coating sub-area based on the coating weight data corresponding to the coating sub-area and the partition information corresponding to the coating sub-area includes: determining the first weight corresponding to the coating sub-area based on the weight corresponding to each of the detection positions and the average weight; determining the second weight corresponding to the coating sub-area based on a threshold weight, the average weight and the first weight; wherein the threshold weight is determined based on the weight corresponding to each of the detection positions; determining the coating quality of the coating sub-area based on the first weight, the average weight and the second weight.

[0027] In the embodiment of the present disclosure, the coating quality of the sub-area is determined based on the weight corresponding to each detection position, the average weight of the sub-area and the threshold weight of the sub-area, thereby improving the accuracy of the coating quality of the sub-area.

[0028] In some embodiments, determining the first weight corresponding to the coating sub-area based on the weight corresponding to each of the detection positions and the average weight includes: respectively determining the first difference between the weight corresponding to each of the detection positions and the average weight; determining the first weight corresponding to the coating sub-area based on each of the first differences and the total weight corresponding to the coating sub-area; wherein the total weight represents the total weight contained in the coating weight data corresponding to the coating sub-area.

[0029] In the embodiment of the present disclosure, the first weight is determined based on the difference between the weight corresponding to each detection position and the average weight, and the total weight corresponding to the sub-area, thereby improving the accuracy of the first weight and thus improving the accuracy of the coating quality of the sub-area.

[0030] In some embodiments, the threshold weight includes a maximum weight and a minimum weight; determining the second weight corresponding to the coating sub-area based on the threshold weight, the average weight and the first weight includes: determining a second difference between the average weight and the minimum weight; determining a third difference between the maximum weight and the average weight; and determining the second weight corresponding to the coating sub-area based on the second difference, the third difference and the first weight.

[0031] In the embodiment of the present disclosure, the second weight is determined based on the maximum weight, the minimum weight, the average weight and the first weight, which improves the accuracy of the second weight and thus improves the accuracy of the coating quality of the sub-area.

[0032] In some embodiments, determining the coating quality of the coating sub-area based on the first weight, the average weight and the second weight includes: determining a deviation value between a third weight and a corresponding threshold value; wherein the third weight includes the first weight, the average weight and the second weight; when the deviation value meets a preset condition, determining that there is no abnormality in the coating quality of the coating sub-area; when the deviation value does not meet the preset condition, determining that there is an abnormality in the coating quality of the coating sub-area.

[0033] In the embodiment of the present disclosure, whether there is any abnormality in the coating quality of each sub-area is determined based on the different weights of the sub-areas and the corresponding thresholds. This not only enables the sub-areas with quality abnormalities to be located quickly and effectively, thereby improving the coating production efficiency, but also reduces the possibility of the outflow of electrodes with coating abnormalities.

[0034] In some embodiments, the method includes: displaying a first interface; wherein the first interface includes a display area; in response to receiving partition information corresponding to each coating sub-area in the non-thinning area of ​​the pole piece, displaying the partition information corresponding to each coating sub-area in the non-thinning area of ​​the pole piece in the display area.

[0035] In the embodiment of the present disclosure, by displaying the partition information corresponding to each coating sub-area in real time in the first interface, the coating status of each sub-area is reflected more intuitively, so that it is possible to quickly and effectively locate whether there is a sub-area with abnormal coating quality.

[0036] In some embodiments, the display area includes a first display sub-area and a second display sub-area; the displaying of the partition information corresponding to each coating sub-area in the non-thinning area of ​​the pole piece in the display area includes: in the first display sub-area, displaying the partition information corresponding to each coating sub-area in the non-thinning area of ​​the pole piece in a first display mode; in the second display sub-area, displaying the partition information corresponding to each coating sub-area in at least one historical non-thinning area of ​​the pole piece in a second display mode.

[0037] In the embodiment of the present disclosure, the partition information corresponding to each sub-area in the current non-thinning area and each sub-area in multiple historical non-thinning areas is displayed respectively through different display methods, which more intuitively reflects the coating conditions corresponding to each coating sub-area during each coating pass, thereby being able to quickly and effectively locate whether there is a sub-area with abnormal coating quality during the current coating pass, whether there is an abnormality in the same coating sub-area during each coating pass, etc.

[0038] In some embodiments, the first interface also includes a first setting control, and the method further includes: displaying a second interface in response to a triggering operation on the first setting control; wherein the second interface includes a property setting control, and the property setting control is used to set the property information of the pole piece, and the property information of the pole piece includes at least one of the following: property information of the thinning area, and property information of the spot area.

[0039] In the embodiment of the present disclosure, the attribute information of the electrode is set through a visual interface, which simplifies the operation steps and improves the accuracy of the attribute information of the electrode.

[0040] In some embodiments, the first interface also includes a second setting control, and the method further includes: displaying a third interface in response to a triggering operation on the second setting control; wherein the third interface includes a substrate setting control and a coating weight setting control, the substrate setting control is used to set the weight of the substrate corresponding to the electrode, and the coating weight setting control is used to set the weight of the coating corresponding to the electrode.

[0041] In the embodiment of the present disclosure, the weight of the substrate and the coating weight corresponding to the electrode are set through a visual interface, which simplifies the operation steps and improves the accuracy of the information.

[0042] The present disclosure provides a coating system, including a control device and a collection device, wherein:

[0043] The collecting device is used to collect coating weight data corresponding to the electrode; wherein the electrode comprises a coating area and a blank area, and the coating area is coated with an active material coating;

[0044] The control device is used to determine the coating area from the electrode based on the coating weight data and the reference weight corresponding to the electrode; wherein the coating area includes a non-thinning area and a thinning area, and the coating thickness of the thinning area is less than the coating thickness of the non-thinning area; based on the attribute information of the electrode, the non-thinning area is determined from the coating area.

[0045] In the embodiment of the present disclosure, the effective non-thinning area is determined by collecting the coating weight data corresponding to the electrode, the reference weight corresponding to the electrode and the attribute information of the electrode collected by the collection device. Compared with the edge inspection of the non-thinning area through the extreme value offset algorithm, the accuracy of the non-thinning area is improved.

[0046] In some embodiments, the coating system also includes a display device; the control device is further used to: for each coating sub-area in the non-thinning area, based on the coating weight data corresponding to the coating sub-area, determine the partition information corresponding to the coating sub-area; the display device is used to display the partition information corresponding to each of the coating sub-areas.

[0047] In the embodiment of the present disclosure, on the one hand, the partition information corresponding to each sub-area is determined based on the coating weight data corresponding to each coating sub-area, thereby improving the accuracy of the partition information; on the other hand, by displaying the partition information corresponding to each coating sub-area in real time, the coating situation of each sub-area is more intuitively reflected, so that it is possible to quickly and effectively locate whether there is a sub-area with abnormal coating quality.

[0048] An embodiment of the present disclosure provides a computer device, including a processor and a memory, wherein the memory stores a computer program that can be run on the processor, and the processor implements the above method when executing the computer program.

[0049] An embodiment of the present disclosure provides a computer-readable storage medium having a computer program stored thereon. When the computer program is executed by a processor, the above method is implemented.

[0050] An embodiment of the present disclosure provides a computer program product, including a computer program or instructions, which implement the above method when executed by a processor.

[0051] In the disclosed embodiment, by obtaining coating weight data corresponding to the electrode, wherein the electrode includes a coating area and a blank area, and the coating area is coated with an active material coating; based on the coating weight data and the reference weight corresponding to the electrode, the coating area is determined from the electrode; wherein the coating area includes a non-thinned area and a thinned area, and the coating thickness of the thinned area is less than the coating thickness of the non-thinned area; based on the attribute information of the electrode, the non-thinned area is determined from the coating area. In this way, the effective non-thinned area is determined by the coating weight data corresponding to the electrode, the reference weight corresponding to the electrode, and the attribute information of the electrode, which improves the accuracy of the non-thinned area compared to the non-thinned area patrol using the extreme value offset algorithm.

[0052] It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] The accompanying drawings herein are incorporated into and constitute a part of the specification. These drawings illustrate embodiments consistent with the present disclosure and, together with the specification, are used to explain the technical solutions of the present disclosure.

[0054] FIG1 is a schematic diagram of a first implementation flow of a coating method provided by an embodiment of the present disclosure;

[0055] FIG2 is a schematic diagram 1 of a first interface provided by an embodiment of the present disclosure;

[0056] FIG3 is a second schematic diagram of a first interface provided by an embodiment of the present disclosure;

[0057] FIG4 is a schematic diagram of a second interface provided by an embodiment of the present disclosure;

[0058] FIG5 is a schematic diagram of a third interface provided by an embodiment of the present disclosure;

[0059] FIG6 is a second schematic diagram of a coating method according to an embodiment of the present disclosure;

[0060] FIG7 is a third schematic diagram of a coating method according to an embodiment of the present disclosure;

[0061] FIG8 is a fourth schematic diagram of a coating method according to an embodiment of the present disclosure;

[0062] FIG9 is a schematic diagram of the composition structure of a coating system provided in an embodiment of the present disclosure;

[0063] FIG10 is a schematic diagram of a hardware entity of a computer device provided in an embodiment of the present disclosure. DETAILED DESCRIPTION

[0064] In order to make the purpose, technical solutions and advantages of the present disclosure clearer, the present disclosure will be further described in detail below with reference to the accompanying drawings. The described embodiments should not be regarded as limiting the present disclosure. All other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present disclosure.

[0065] In the following description, reference is made to “some embodiments”, which describes a subset of all possible embodiments, but it will be understood that “some embodiments” may be the same subset or different subsets of all possible embodiments and may be combined with each other without conflict.

[0066] In the following description, the terms "first\second\third" are merely used to distinguish similar objects and do not represent a specific ordering of the objects. It is understandable that "first\second\third" can be interchanged with a specific order or sequence where permitted, so that the embodiments of the present disclosure described herein can be implemented in an order other than that illustrated or described herein.

[0067] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art in the art of the present disclosure. The terms used herein are only for the purpose of describing the embodiments of the present disclosure and are not intended to limit the present disclosure.

[0068] In related technologies, new energy batteries are increasingly being used in daily life and industry. New energy batteries are not only used in energy storage systems such as hydropower, thermal power, wind power, and solar power plants, but are also widely used in electric vehicles such as electric bicycles, electric motorcycles, and electric vehicles, as well as in aerospace and other fields. As the application areas of power batteries continue to expand, their market demand is also growing. Batteries can be single cells. A single cell is a basic unit that can convert chemical energy into electrical energy and can be used to make battery modules or battery packs to power electrical devices. A single cell can be a secondary battery, which refers to a cell that can be recharged to activate the active material after discharge and continue to be used. Cells can be lithium-ion batteries, sodium-ion batteries, sodium-lithium-ion batteries, lithium metal batteries, sodium metal batteries, lithium-sulfur batteries, magnesium-ion batteries, nickel-metal hydride batteries, nickel-cadmium batteries, lead-acid batteries, and others. A battery can also be a single physical module comprising one or more cells to provide higher voltage and capacity. When there are multiple cells, they are connected in series, parallel, or in parallel via a busbar.

[0069] A battery cell includes an electrode assembly and an electrolyte. The electrode assembly includes a positive electrode sheet, a negative electrode sheet, and a separator. A battery cell primarily operates by the movement of metal ions between the positive and negative electrode sheets. The positive electrode sheet includes a positive electrode current collector (also known as a positive electrode substrate) and a positive electrode active material layer, which is coated on the surface of the positive electrode current collector. Taking a lithium-ion battery as an example, the positive electrode current collector can be made of aluminum, and the positive electrode active material layer includes a positive electrode active material, which can be lithium cobalt oxide, lithium iron phosphate, ternary lithium, or lithium manganese oxide. The negative electrode sheet includes a negative electrode current collector (also known as a negative electrode substrate) and a negative electrode active material layer, which is coated on the surface of the negative electrode current collector. The negative electrode current collector can be made of copper, and the negative electrode active material layer includes a negative electrode active material, which can be carbon or silicon, etc.

[0070] Positive and negative electrodes are the main components of battery cells and determine the electrochemical performance and safety of the battery. Positive and negative electrodes are made by slitting the coated substrate. Coating refers to the process of evenly, continuously or discontinuously coating the prepared battery slurry on the substrate (or current collector). Battery slurry is made of materials such as binders, active substances, and conductive agents. The substrate can be any suitable substrate, for example, aluminum foil, copper foil, etc. The electrode includes a coating area and a blank area. The blank area refers to the area that does not need to be coated, that is, the area where the active material layer is not coated on the surface of the current collector. The blank area reserves operating space for subsequent processing steps (for example, cutting the tabs). The coating area refers to the area that needs to be coated, that is, the area where the active material layer is coated on at least one surface of the substrate (including the front and back sides, etc.). The coating area includes a thinning area and a non-thinning area. The thinning area is located at the edge of the coating area, and the coating thickness of the thinning area is less than the coating thickness of the non-thinning area.

[0071] The coating quality of the electrode is closely related to the battery capacity, life, safety, etc. Among them, the coating quality of the electrode mainly refers to the coating quality of the non-thinned area. At present, the obtained coating weight data is basically patrolled by the extreme value offset algorithm to obtain the edge of the non-thinned area, but the edge of the thinned area cannot be obtained. Since the weight data of the thinned area is not smooth, the algorithm cannot accurately process the data of the thinned area, resulting in a low accuracy of the determined non-thinned area. At the same time, since the accuracy of the non-thinned area is not high, the non-thinned area determined by each pass of the coating weight data may be different, so that the weight data contained in each partition corresponding to each non-thinned area is also different, and it is impossible to truly reflect the weight data contained in the actual partition.

[0072] The embodiment of the present disclosure provides a coating method, which determines the effective non-thinning area through the coating weight data corresponding to the electrode, the reference weight corresponding to the electrode and the attribute information of the electrode, and improves the accuracy of the non-thinning area compared to the edge inspection of the non-thinning area through the extreme value offset algorithm. The method provided by the embodiment of the present disclosure can be executed by a computer device, and the computer device can be various types of terminals such as a laptop computer, a tablet computer, a desktop computer, a coating device, etc. In some embodiments, the coating device also has a control device, which can be at least one of a programmable logic controller (PLC), a single-chip microcomputer, an intermediate computer, and a host computer.

[0073] Below, the technical solutions in the embodiments of the present disclosure will be clearly and completely described in conjunction with the drawings in the embodiments of the present disclosure.

[0074] FIG1 is a schematic diagram of a first implementation flow of a coating method provided by an embodiment of the present disclosure. As shown in FIG1 , the method includes steps S11 to S13, wherein:

[0075] Step S11: Obtain coating weight data corresponding to the electrode.

[0076] Here, the electrode includes a coating area and a blank area, and the coating area is coated with an active material coating. The coating weight data includes the coating weight corresponding to each detection position in the electrode. During implementation, the coating is carried out along the length direction of the electrode, and the length direction is perpendicular to the width direction. After the electrode is coated this time, there will be obvious weight jumps on both sides of the width direction of the coating area, and the area where no weight jump occurs is the blank area, and the area where the weight jump occurs is the coating area. The coating area includes a non-thinning area and a thinning area. During the coating process, in order to avoid problems such as thick edges and bulging edges of the electrode, it is necessary to thin the coating of the edge area of ​​the electrode to produce a thinning area.

[0077] The coating weight data may be obtained in any suitable manner, for example, by a pre-set collection device, such as a thickness gauge, a weight detector, an areal density meter, etc. The coating weight data may refer to the density, weight, thickness, etc. of the coating.

[0078] Step S12: determining a coating area from the electrode piece based on the coating weight data and a reference weight corresponding to the electrode piece.

[0079] Here, the coating area includes a thinning area and a non-thinning area, and the coating thickness of the thinning area is less than the coating thickness of the non-thinning area. Different pole pieces may correspond to the same or different reference weights. In some embodiments, the reference weight is determined based on the weight of the substrate corresponding to the pole piece and the weight of the coating. Among them, the coating weight may include but is not limited to the coating weight of the A side, the coating weight of the A+B side, etc. Among them, the A side is one surface of the pole piece, and the B side is the other surface of the pole piece. During implementation, if the A side is coated, then the coating weight may be the coating weight of the A side; if the B side is coated after the A side is coated, then the coating weight may be the coating weight of the A+B side. In some embodiments, the coating weight of the A / B side corresponds to the pole piece. Different pole pieces may have the same or different coating weights of the A / B side.

[0080] In some embodiments, the reference weight may be determined by, but is not limited to, the mean / variance / mean square error between the weight of the substrate corresponding to the electrode piece and the weight of the coating, weighted / logarithmic / exponential of the mean / variance / mean square error, etc. For example, the mean between the weight of the substrate corresponding to the electrode piece and the weight of the coating is used as the reference weight corresponding to the electrode piece.

[0081] In some embodiments, step S12 includes steps S121 to S123, wherein:

[0082] Step S121: Determine a reference weight corresponding to the electrode piece based on the weight of the substrate corresponding to the electrode piece and the weight of the coating corresponding to the electrode piece.

[0083] Here, the coating weight may include but is not limited to the coating weight of surface A, the coating weight of surface A+B, etc. In practice, different pole pieces correspond to the same or different substrate weights and coating weights.

[0084] Methods for determining the reference weight may include, but are not limited to, the mean / variance / mean square error between the weight of the substrate corresponding to the electrode and the coating weight, weighting / logarithm / exponential of the mean / variance / mean square error, etc.

[0085] In some embodiments, step S121 includes steps S1211 to S1212, wherein:

[0086] Step S1211: Determine the sum of the weight of the substrate and the weight of the coating.

[0087] The coating weight includes one of the following: the weight of single-sided coating and the weight of double-sided coating. The weight of single-sided coating may refer to the weight of coating on side A. The weight of double-sided coating may refer to the weight of coating on sides A+B. In some embodiments, the coating weight is pre-set. For example, when coating side A of the electrode, the coating weight is the weight of coating on side A; when coating side B of the electrode, the coating weight is the weight of coating on sides A+B.

[0088] Step S1212: Based on the sum value, determine the reference weight corresponding to the electrode.

[0089] Taking the mean of the sum as the reference weight corresponding to the electrode piece as an example, in some embodiments, the reference weight RW corresponding to the electrode piece can be determined by the following formula (1-1), namely:

[0090] Among them, W s is the weight of the substrate, W c Coating weight.

[0091] In this way, the reference weight is determined in real time by the sum of the weight of the substrate and the weight of the single-sided / double-sided coating, which improves the accuracy of the reference weight compared to a constant reference weight.

[0092] Step S122: Based on the reference weight corresponding to the electrode, the coating weight data is updated to obtain updated coating weight data.

[0093] Here, the coating weight data includes the weight corresponding to at least one detection position in the electrode piece. In implementation, the number of detection positions is adapted to the width of the electrode piece. For example, if the electrode piece width is 1000 millimeters (mm), the number of detection positions can also be 1000, that is, the coating weight data includes the weight corresponding to 1000 detection positions.

[0094] Methods for updating coating weight data include, but are not limited to, replacement and retention. For example, the weight corresponding to a certain detection position is compared with a reference weight. If the weight corresponding to the detection position is less than the reference weight, the weight corresponding to the detection position is updated to a preset weight. If the weight corresponding to the detection position is not less than the reference weight, the weight corresponding to the detection position remains unchanged. The preset weight can be any suitable weight, such as 0 or 0.5 micrograms (ug).

[0095] In some embodiments, the updated coating weight data includes a target weight corresponding to each detection position; step S122 includes step S1221, wherein:

[0096] Step S1221: For the weight corresponding to each detection position in the pole piece, determine the target weight corresponding to the detection position based on the weight corresponding to the detection position and the reference weight corresponding to the pole piece.

[0097] Here, the target weight may be the weight corresponding to the detection position, or a preset weight, etc. The preset weight may be any suitable weight, for example, 0 μg, 0.5 μg, etc. During implementation, the weight corresponding to the detection position is compared with the reference weight to determine the target weight corresponding to the detection position.

[0098] In some embodiments, the step S1221 of “determining a target weight corresponding to the detection position based on the weight corresponding to the detection position and the reference weight corresponding to the electrode piece” includes step S141 and / or step S142, wherein:

[0099] Step S141: When the weight corresponding to the detection position is less than the reference weight corresponding to the electrode, the preset weight is used as the target weight corresponding to the detection position.

[0100] Here, if the weight corresponding to the detection position is less than the reference weight, it indicates that the detection position may belong to the blank area, and then the preset weight is used as the target weight corresponding to the detection position. The preset weight can be any appropriate weight, for example, 0.

[0101] Step S142: When the weight corresponding to the detection position is not less than the reference weight corresponding to the electrode piece, the weight corresponding to the detection position is used as the target weight corresponding to the detection position.

[0102] Here, if the weight corresponding to the detection position is not less than the reference weight, it indicates that the detection position may belong to the coating area, and then the weight corresponding to the detection position is used as the target weight corresponding to the detection position.

[0103] In this way, the reference weight is compared with the weight corresponding to the detection position, and the preset weight or the weight corresponding to the detection position is used as the target weight, thereby improving the accuracy of the target weight and thus improving the accuracy of the coating area edge inspection. Among them, edge inspection refers to obtaining the edge of the coating area.

[0104] Step S123: Determine the coating area from the electrode based on the updated coating weight data.

[0105] Here, the updated coating weight data is traversed in sequence. When a certain weight changes from a preset weight to a non-preset weight, the detection position corresponding to the non-preset weight is the left edge of the coating area; when a certain weight changes from a non-preset weight to a preset weight, the detection position corresponding to the non-preset weight is the right edge of the coating area. Then, the area formed by the left edge and the right edge is the coating area.

[0106] For example, the updated coating weight data includes: {A0, A1, A2, ... A97, A98, A99}, and traverses from A0. If A0 to A2 are all preset weights and A3 is a non-preset weight, then the detection position corresponding to A3 is the left edge of the coating area; if A4 to A97 are all non-preset weights and A98 is a preset weight, then the detection position corresponding to A97 is the right edge of the coating area.

[0107] In some embodiments, since the installation of the collection device may be limited by the on-site installation space, the starting scanning position of the collection device may be opposite to the actual coating direction of the coating equipment. At this time, the updated coating weight data needs to be reversely processed, that is: the updated coating weight data is reversely traversed. When a certain weight changes from a preset weight to a non-preset weight, the detection position corresponding to the non-preset weight is the left edge of the coating area; when a certain weight changes from a non-preset weight to a preset weight, the detection position corresponding to the non-preset weight is the right edge of the coating area. Then, the area formed by the left edge and the right edge is the coating area.

[0108] For example, the updated coating weight data includes: {A0, A1, A2, ... A97, A98, A99}, and traverses from A99. If A98 to A99 are all preset weights and A97 is a non-preset weight, then the detection position corresponding to A97 is the left edge of the coating area; if A4 to A97 are all non-preset weights and A3 is a preset weight, then the detection position corresponding to A4 is the right edge of the coating area.

[0109] In the embodiment of the present disclosure, on the one hand, the reference weight is determined by the weight of the substrate corresponding to the pole piece and the weight of the coating, thereby improving the accuracy of the reference weight determination; on the other hand, the coating area is patrolled from the coating weight data through the reference weight, thereby improving the accuracy of the coating area determination, thereby helping to determine the non-thinning area.

[0110] Step S13: Based on the property information of the electrode, a non-thinned area is determined from the coating area.

[0111] Here, the attribute information of the pole piece may include, but is not limited to, at least one of the attribute information of the thinned area and the attribute information of the spot area. The attribute information of the thinned area may include, but is not limited to, the width, length, etc. The attribute information of the spot area may include, but is not limited to, the radius, diameter, etc. of the spot area. For example, the attribute information of the pole piece includes the width of the thinned area and / or the radius of the spot area. During implementation, the width of the thinned area and the radius of the spot area may be preset, and the width of the thinned area / the radius of the spot area may be any suitable value, for example, 0, 5 mm, etc.

[0112] The non-shaving area is not larger than the coating area. For example, if the width of the shaving area and the radius of the spot area are both 0, then the coating area is the non-shaving area; if the width of the shaving area is not 0 and / or the radius of the spot area is not 0, then the non-shaving area is smaller than the coating area.

[0113] In some embodiments, step S13 includes one of steps S131 to S133, wherein:

[0114] Step S131: When the attribute information of the electrode includes the attribute information of the thinning area and the attribute information of the spot area, the area formed by shifting the boundary lines on both sides of the coating area toward the middle by a first length is used as the non-thinning area; wherein the first length includes the width of the thinning area and the radius of the spot area.

[0115] Here, the attribute information of the thinned area may include the width of the thinned area, which may be any appropriate value, such as 0 or 5 mm. The attribute information of the spot area may include the radius of the spot area, which may be any appropriate value, such as 0, 8 mm, or 10 mm. During implementation, the width of the thinned area and the radius of the spot area may be preset.

[0116] The non-shaving area is no larger than the coating area. For example, if the width of the shaving area and the radius of the spot area are both 0, then the first length is 0, and the coating area is the non-shaving area. If the width of the shaving area is not 0 and / or the radius of the spot area is not 0, then the first length is greater than 0, and the non-shaving area is smaller than the coating area. For example, if the width of the shaving area and the radius of the spot area are both 5 mm, and the width of the coating area is 200 mm, then the width of the non-shaving area is 180 mm (200 - 5*2*2).

[0117] Step S132: When the property information of the electrode includes the property information of the thinning area, the area formed by shifting the boundary lines on both sides of the coating area toward the middle by a second length is used as the non-thinning area; wherein the second length includes the width of the thinning area.

[0118] Here, the attribute information of the thinned region may include the width of the thinned region. The second length may be 0 or greater than 0. In implementation, if the attribute information of the electrode only includes the attribute information of the thinned region, the second length is the width of the thinned region.

[0119] The non-skimmed area is no larger than the coated area. For example, if the width of the skimmed area is 0, then the second length is 0, and the coated area is the non-skimmed area. If the width of the skimmed area is not 0, then the second length is greater than 0, and the non-skimmed area is smaller than the coated area. For example, if the width of the skimmed area is 10 mm and the width of the coated area is 300 mm, then the width of the non-skimmed area is 280 mm (300 - 10 * 2).

[0120] Step S133: When the property information of the electrode includes the property information of the spot area, the area formed by translating the boundary lines on both sides of the coating area toward the middle by a third length is used as the non-thinning area; wherein the third length includes the radius of the spot area.

[0121] Here, the attribute information of the light spot area may include the radius of the light spot area. The third length may be 0 or greater than 0. In implementation, if the attribute information of the pole piece only includes the attribute information of the light spot area, the third length is the radius of the light spot area.

[0122] The non-shaving area is no larger than the coating area. For example, if the radius of the spot area is 0, then the third length is 0, and the coating area is the non-shaving area. If the radius of the spot area is not 0, then the third length is greater than 0, and the non-shaving area is smaller than the coating area. For example, if the radius of the spot area is 8 mm and the width of the coating area is 200 mm, then the width of the non-shaving area is 184 mm (200-8*2).

[0123] In this way, the non-shaving area is determined from the coating area according to the size of the preset shaving area and / or the light spot area, thereby improving the accuracy of the non-shaving area.

[0124] In the embodiment of the present disclosure, by obtaining the coating weight data corresponding to the electrode; wherein the electrode includes a coating area and a blank area, and the coating area is coated with an active material coating; based on the coating weight data and the reference weight corresponding to the electrode, the coating area is determined from the electrode. wherein the coating area includes a non-thinned area and a thinned area, and the coating thickness of the thinned area is less than the coating thickness of the non-thinned area; based on the attribute information of the electrode, the non-thinned area is determined from the coating area. In this way, the effective non-thinned area is determined by the coating weight data corresponding to the electrode, the reference weight corresponding to the electrode, and the attribute information of the electrode, which improves the accuracy of the non-thinned area compared to the non-thinned area patrol by the extreme value offset algorithm.

[0125] In some embodiments, the method further includes steps S151 to S152, wherein:

[0126] Step S151: Divide the non-skimmed area into at least one coating sub-area.

[0127] Here, the number of coating sub-areas can be at least one, for example, 2 or 4. The division method can be any appropriate method, for example, uniform, random, etc. In some embodiments, the width dimension of the same electrode piece can be the sum of the widths of multiple electrode pieces. During implementation, it can be cut along the width direction of the non-thinned area to form multiple electrode pieces. In some embodiments, the non-thinned area is divided into multiple coating sub-areas, and the coating quality of different sub-areas is evaluated to quickly locate the sub-area with quality abnormalities, thereby adjusting the flow of the slurry corresponding to the sub-area, that is, adjusting the thickness of the coating of the sub-area so that the coating quality of the sub-area meets the standard.

[0128] Step S152: for each coating sub-area, based on the coating weight data corresponding to the coating sub-area, determine the partition information corresponding to the coating sub-area.

[0129] Here, the partition information may be any suitable information. For example, average weight, threshold weight, etc. The threshold weight may include a maximum weight, a minimum weight, etc. For example, the average of the weights corresponding to the various detection positions within the coating sub-region may be used as the partition information. For another example, the maximum weight and the minimum weight corresponding to the various detection positions within the coating sub-region may be used as the partition information.

[0130] In the embodiment of the present disclosure, on the one hand, the non-thinning area is divided into multiple coating sub-areas, so that the coating weight data of each sub-area is consistent with the actual partition size and position, and can truly reflect the coating weight data contained in each actual partition; on the other hand, the partition information corresponding to each sub-area is determined according to the coating weight data corresponding to each coating sub-area, thereby improving the accuracy of the partition information.

[0131] In some embodiments, the method further includes steps S161 to S162, wherein:

[0132] Step S161: display a first interface; wherein the first interface includes a display area.

[0133] Here, the first interface is an interactive interface for configuring the electrode and displaying information. The first interface may include but is not limited to areas where configuration operations can be performed, operation controls, etc. Among them, the areas where configuration operations can be performed may include but are not limited to at least one of areas for configuring the electrode, areas for fitting each coating sub-area, etc. During implementation, those skilled in the art can determine the number of areas where configuration operations can be performed in the first interface, as well as the specific layout of each area where configuration operations can be performed in the first interface according to actual conditions, and the embodiments of the present disclosure are not limited thereto.

[0134] The operation control can be any suitable operable control. For example, a first setting control, a second setting control, a display control, etc. Among them, the first setting control is mainly used to configure the attribute information of the electrode. The display control is used to display the partition information corresponding to each coating sub-area. The second setting control is mainly used to set the weight of the substrate corresponding to the electrode, the coating weight, etc. During implementation, those skilled in the art can determine the number of operation controls and the position of each operation control in the first interface according to actual conditions, and the embodiments of the present disclosure are not limited thereto.

[0135] The first interface can be displayed on any suitable computer device with an interface interaction function, for example, the first interface can be displayed on a laptop computer, a mobile phone, a tablet computer, a PDA, a personal digital assistant, a digital television or a desktop computer. During implementation, the computer device that displays the first interface and the computer device that executes the coating method can be the same or different, and are not limited here. For example, the computer device that executes the coating method can be a coating device, and the computer device that displays the first interface can be a laptop computer. The first interface can be an interactive interface of a client running on the laptop computer, or it can be a web page displayed in a browser running on the laptop computer. For another example, the computer device that executes the coating method and the computer device that displays the first interface are both coating devices.

[0136] Step S162 : in response to receiving the partition information corresponding to each coating sub-area in the non-thinned area of ​​the pole piece, displaying the partition information corresponding to each coating sub-area in the non-thinned area of ​​the pole piece in the display area.

[0137] Here, the partition information corresponding to the coating sub-area may include, but is not limited to, average weight, threshold weight, etc. During implementation, upon receiving the partition information corresponding to each coating sub-area in the current non-skimmed area, it is directly transferred to the display area for display. The display format may include, but is not limited to, a graph, a list, etc.

[0138] FIG2 is a schematic diagram of a first interface provided by an embodiment of the present disclosure. As shown in FIG2 , the first interface 20 includes a display area 21 and a first setting control 22. The display area 21 is used to display the partition information corresponding to each coating sub-area. The first setting control 22 is mainly used to configure the attribute information of the electrode.

[0139] In some embodiments, the first interface can also be used to create new electrodes, perform quality assessments on the electrodes, monitor coating weight data, etc. In some embodiments, the first interface is only open or accessible to certain personnel (e.g., managers, developers, etc.). For example, managers can only manage various electrodes, such as creating new electrodes, editing, deleting, and saving existing electrodes, after successfully logging in with their account and password.

[0140] In the embodiment of the present disclosure, by displaying the partition information corresponding to each coating sub-area in real time in the first interface, the coating status of each sub-area is reflected more intuitively, so that it is possible to quickly and effectively locate whether there is a sub-area with abnormal coating quality.

[0141] In some embodiments, the display area includes a first display sub-area and a second display sub-area; and step S162 of "displaying in the display area the partition information corresponding to each coating sub-area in the non-thinned area of ​​the electrode" includes steps S1621 to S1622, wherein:

[0142] Step S1621: Displaying the partition information corresponding to each coating sub-area in the non-thinned area of ​​the electrode in a first display mode in a first display sub-area.

[0143] Here, the first display mode can be any suitable mode, for example, a bar graph, a broken line graph, etc. In some embodiments, if the substrate is double-sided coated, the first display sub-area can display at least one of the partition information corresponding to each coating sub-area in the non-thinned area of ​​side A, the partition information corresponding to each coating sub-area in the non-thinned area of ​​side B, etc. In some embodiments, the partition information corresponding to the coating sub-area with abnormalities can also be highlighted. For example, if the average weight of the coating sub-area (corresponding to the partition information) is not within its deviation range, then the average weight of the coating sub-area can be highlighted. Highlighting can include but is not limited to highlighting, changing color, etc.

[0144] Step S1622: Displaying, in the second display sub-area, the partition information corresponding to each coating sub-area in at least one historical non-thinned area of ​​the electrode in a second display mode.

[0145] Here, the second display mode can be any suitable mode, for example, a list. During implementation, the second display sub-area includes partition information corresponding to each coating sub-area in a plurality of historical non-thinning areas. The plurality of historical non-thinning areas may include a current non-thinning area and at least one non-thinning area before the current non-thinning area. In some embodiments, if the substrate is double-sided coated, the second display sub-area may display at least one of the partition information corresponding to each coating sub-area in the historical non-thinning area of ​​side A, the partition information corresponding to each coating sub-area in the historical non-thinning area of ​​side B, and the like.

[0146] In some embodiments, the subarea information corresponding to the abnormal coating subarea may be highlighted. For example, if the average weight of the coating subarea (corresponding to the subarea information) is not within the deviation range, the average weight of the coating subarea may be highlighted. The highlighting may include, but is not limited to, highlighting, changing the color, bolding, etc.

[0147] FIG3 is a second schematic diagram of a first interface provided by an embodiment of the present disclosure. As shown in FIG3 , the first interface 20 includes a display area 21, a first setting control 22, and a second setting control 23. The display area 21 includes a first display sub-area 211 and a second display sub-area 212. The first display sub-area 211 is used to display the partition information corresponding to each coating sub-area in the current non-thinning area, and the second display sub-area 212 is used to display the partition information corresponding to each coating sub-area in multiple historical non-thinning areas. The first setting control 22 is mainly used to configure the attribute information of the electrode. The second setting control 23 is mainly used to set the weight of the substrate corresponding to the electrode, the coating weight, etc.

[0148] In this way, different display methods are used to display the partition information corresponding to each sub-area in the current non-thinning area and each sub-area in multiple historical non-thinning areas, which can more intuitively reflect the coating conditions corresponding to each coating sub-area during each coating pass. This can quickly and effectively locate whether there are sub-areas with abnormal coating quality during the current coating pass, whether there are abnormal conditions in the same coating sub-area during each coating pass, etc.

[0149] In some implementations, the first interface further includes a first setting control, and the method further includes step S171, wherein:

[0150] Step S171, in response to the triggering operation of the first setting control, display the second interface; wherein the second interface includes a property setting control, the property setting control is used to set the property information of the pole piece, and the property information of the pole piece includes at least one of the following: property information of the thinning area, and property information of the spot area.

[0151] Here, the triggering operation for the first setting control may be any suitable triggering operation, such as a gesture, voice, etc. For example, clicking the first setting control.

[0152] The second interface is mainly used for configuring the attribute information of the electrode and an interactive interface for displaying information. The second interface may include, but is not limited to, areas where configuration operations can be performed, operation controls, etc. Among them, the areas where configuration operations can be performed are used to query or edit existing electrode pieces. During implementation, those skilled in the art can determine the number of areas where configuration operations can be performed in the second interface, as well as the specific layout of each area where configuration operations can be performed in the second interface, based on actual conditions, and the embodiments of the present disclosure do not limit this.

[0153] The operation control can be any suitable operable control, such as a save control, a close control, a browse control, an edit control, etc. During implementation, those skilled in the art can determine the number of operation controls and the position of each operation control in the second interface based on actual circumstances, and the present disclosure does not limit this.

[0154] The second interface may be located in the first interface, or may be independent of the first interface (eg, a pop-up window, a new window, etc.).

[0155] FIG4 is a schematic diagram of a second interface provided by an embodiment of the present disclosure. As shown in FIG4 , the second interface 40 includes a first configuration area 41, a first save control 42, and a close control 43. The first configuration area 41 includes a property setting control 411, which is mainly used to configure the property information of the electrode, such as the property information of the thinned area and the property information of the spot area.

[0156] In some embodiments, the second interface can also be used to configure the basic information of the machine, the storage path of the data, the identification length of the pole piece, the number of partitions, the partition retention settings, the number of historical non-thinning areas displayed in the second display sub-area, shutdown filtering, data reverse processing, etc.

[0157] The basic information of the machine may include but is not limited to the equipment number, machine number, process (cathode / anode), etc. The storage path of the data may include but is not limited to the coating weight data corresponding to each coating area, the coating weight data corresponding to the non-thinning area, the partition information / coating quality corresponding to each coating sub-area, etc. The identification length of the electrode may refer to the length of the film roll number, which can be any suitable length, for example, 8, 18, etc. The number of partitions is used to set the number of coating sub-areas divided by the non-thinning area. The partition retention setting is used to configure whether the data of the last partition is retained. The size of the last partition may be smaller than the size of other partitions. If the data of the last partition is retained, the coating quality of the last partition also needs to be evaluated. The shutdown filter is used to set whether to collect the coating weight data. During implementation, if no coating is performed, that is, the coating speed is 0, then the collected coating weight data is meaningless. Data reverse processing is used to set whether the coating weight data corresponding to the non-thinning area needs to be reversed.

[0158] In the embodiment of the present disclosure, the attribute information of the electrode is set through a visual interface, which simplifies the operation steps and improves the accuracy of the attribute information.

[0159] In some embodiments, the first interface further includes a second setting control, and the method further includes step S181, wherein:

[0160] Step S181, in response to the triggering operation of the second setting control, displaying the third interface; wherein the third interface includes a substrate setting control and a coating weight setting control, the substrate setting control is used to set the weight of the substrate corresponding to the electrode, and the coating weight setting control is used to set the weight of the coating corresponding to the electrode.

[0161] Here, the triggering operation for the second setting control may be any suitable triggering operation, such as a gesture, voice, etc. For example, clicking the second setting control.

[0162] The third interface is mainly used for configuring and displaying information such as the substrate and coating weight of the electrode. The third interface may include but is not limited to areas where configuration operations can be performed, operation controls, etc. Among them, the areas where configuration operations can be performed are used to query or edit existing electrodes, create new electrodes, etc. During implementation, those skilled in the art can determine the number of areas where configuration operations can be performed in the third interface, as well as the specific layout of each area where configuration operations can be performed in the third interface based on actual conditions, and the embodiments of the present disclosure do not limit this.

[0163] The operation control can be any suitable operable control, such as a save control, a cancel control, an edit control, etc. During implementation, those skilled in the art can determine the number of operation controls and the position of each operation control in the third interface based on actual circumstances, and the present disclosure does not limit this.

[0164] The third interface may be located in the first interface, or may be independent of the first interface (eg, a pop-up window, a new window, etc.).

[0165] FIG5 is a schematic diagram of a third interface provided by an embodiment of the present disclosure. As shown in FIG5 , the third interface 50 includes a second configuration area 51, a second save control 52, and a cancel control 53. The second configuration area 51 includes a substrate setting control 511 and a coating weight setting control 512.

[0166] In some embodiments, the third interface can also be used to specify the name, type, substrate width, length, and width of multiple membrane regions of the electrode. Types can include double-sided, single-sided, etc. The width of multiple membrane regions is used to set whether the width of each membrane region is consistent.

[0167] In the embodiment of the present disclosure, the weight of the substrate and the coating weight corresponding to the electrode are set through a visual interface, which simplifies the operation steps and improves the accuracy of the information.

[0168] FIG6 is a second schematic diagram of a coating method according to an embodiment of the present disclosure. As shown in FIG6 , the method includes steps S61 to S64, wherein:

[0169] Step S61: Obtain coating weight data corresponding to the electrode.

[0170] Step S62: Determine a coating area from the electrode piece based on the coating weight data and the reference weight corresponding to the electrode piece.

[0171] Step S63: Based on the property information of the electrode, determine the non-thinned area from the coating area.

[0172] Here, the above steps S61 to S63 correspond to the above steps S11 to S13 respectively. When implementing, please refer to the specific implementation of the above steps S11 to S13.

[0173] Step S64: for each coating sub-area in the non-skimmed area, determine the coating quality of the coating sub-area based on the coating weight data corresponding to the coating sub-area and the partition information corresponding to the coating sub-area.

[0174] Here, the non-skimmed area can be divided into any number of coating sub-areas, for example, two or four. The division method can be any appropriate method, such as uniform, random, etc. For example, the non-skimmed area can be evenly divided into four coating sub-areas. In this way, the width of each coating sub-area is consistent, and the number of weights corresponding to the detection positions contained in each coating sub-area is also the same. For example, the width of the non-thinning area is 200 mm, and the number of weights corresponding to the detection positions included is 200. Then, the non-thinning area is evenly divided into 4 coating sub-areas, the width of each coating sub-area is 50 mm, and the number of weights included is 50, that is: the 0th to 49th weights of the non-thinning area are used as the coating weight data corresponding to the first coating sub-area, the 50th to 99th weights of the non-thinning area are used as the coating weight data corresponding to the second coating sub-area, the 100th to 149th weights of the non-thinning area are used as the coating weight data corresponding to the third coating sub-area, and the 150th to 199th weights of the non-thinning area are used as the coating weight data corresponding to the fourth coating sub-area.

[0175] The partition information corresponding to the coating sub-area may include an average weight, which is the average of the weights corresponding to the detection positions contained in the coating sub-area. For example, if the coating sub-area includes the weights corresponding to 50 detection positions, the average of the weights corresponding to the 50 detection positions is used as the average weight.

[0176] The coating quality may include but is not limited to the presence or absence of abnormalities. Abnormalities may refer to warping, thick edges, dark marks, scratches, etc. In some embodiments, the coating quality of the coating sub-area is determined by comparing each weight with the corresponding threshold value, that is: if each weight is within its corresponding threshold range, then the coating quality of the coating sub-area does not have abnormalities; conversely, if at least one weight is not within its corresponding threshold range, then the coating quality of the coating sub-area has abnormalities. Wherein, the weight may include but is not limited to at least one of the average weight, the first weight, the second weight, etc. The first weight is determined based on the weights corresponding to the various detection positions contained in the coating sub-area and the average weight. The second weight is determined based on the threshold weight, the average weight, and the first weight.

[0177] In some embodiments, the coating weight data corresponding to the coating sub-area includes the weight corresponding to at least one detection position, and the partition information of the coating sub-area includes the average weight; and the step S64 of “determining the coating quality of the coating sub-area based on the coating weight data corresponding to the coating sub-area and the partition information corresponding to the coating sub-area” includes steps S641 to S643, wherein:

[0178] Step S641: Determine a first weight corresponding to the coating sub-area based on the weight corresponding to each detection position and the average weight.

[0179] Here, the method for determining the first weight may include but is not limited to a first ratio, a weighted / logarithmic / exponential method of the first ratio, etc. The first ratio is determined based on the target difference and the total weight. The total weight refers to the total weight corresponding to each detection position contained in the coating sub-area. The target difference may be a certain first difference, several first differences, all first differences, etc. The first difference refers to the difference between the weight corresponding to a certain detection position and the average weight. For example, all first differences are taken as a target difference, and the ratio between the sum of the squares of the target differences and the total weight is taken as the first ratio.

[0180] In some embodiments, step S641 includes steps S6411 to S6412, wherein:

[0181] Step S6411: Determine the first difference between the weight corresponding to each detection position and the average weight.

[0182] Here, the weights corresponding to different detection positions may be different, and thus the first differences may also be different.

[0183] Step S6412: Determine the first weight corresponding to the coating sub-area based on each first difference and the total weight corresponding to the coating sub-area; wherein the total weight represents the total weight included in the coating weight data corresponding to the coating sub-area.

[0184] Here, the first weight may be determined by, but is not limited to, a first ratio, a weighted value, a logarithm, or an exponential value of the first ratio. The first ratio is determined based on the first differences and the total weight. For example, the first ratio may be determined by taking the ratio of the sum of the squares of the first differences to the total weight.

[0185] In some embodiments, the first ratio R1 can be determined by the following formula (1-2):

[0186] Among them, V i is the weight corresponding to the i-th detection position, V m is the average weight, and N is the total weight corresponding to the coating sub-area.

[0187] In some embodiments, the first weight W1 may be the square root of the first ratio, and the first weight W1 may be determined by the following formula (1-3), namely:

[0188] Wherein, R1 is the first ratio.

[0189] In this way, the first weight is determined based on the difference between the weight corresponding to each detection position and the average weight, and the total weight corresponding to the sub-area, thereby improving the accuracy of the first weight and thus improving the accuracy of the coating quality of the sub-area.

[0190] Step S642: Determine a second weight corresponding to the coating sub-area based on the threshold weight, the average weight, and the first weight; wherein the threshold weight is determined based on the weight corresponding to each detection position.

[0191] Here, the threshold weight may include, but is not limited to, at least one of a maximum weight, a minimum weight, and the like.

[0192] The second weight may be determined by the second ratio, the third ratio, the weighted / logarithmic / exponential of the second / third ratios, the mean / variance / mean square error between the second ratio and the third ratio, the weighted / / logarithmic / exponential of the mean / variance / mean square error, etc.

[0193] The second ratio is determined based on the minimum weight, the average weight, and the first weight. Methods for determining the second ratio include, but are not limited to, the ratio of the second difference to the first weight, weighting, logarithmization, or exponentialization of the ratio. The second difference refers to the difference between the average weight and the minimum weight. For example, the weighted value of the ratio can be used as the second ratio.

[0194] In some embodiments, the second ratio R2 can be determined by the following formula (1-4), namely:

[0195] Among them, V min is the minimum weight among the threshold weights, V m is the average weight, and W1 is the first weight.

[0196] The third ratio is determined based on the maximum weight, the average weight, and the first weight. Methods for determining the third ratio include, but are not limited to, the ratio of the third difference to the first weight, weighting, logarithmization, or exponentialization of the ratio. The third difference refers to the difference between the average weight and the maximum weight. For example, the weighted value of the ratio can be used as the third ratio.

[0197] In some embodiments, the third ratio R3 can be determined by the following formula (1-5), namely:

[0198] Among them, V m is the average weight, V max The maximum weight among the threshold weights, W1 is the first weight.

[0199] In some embodiments, step S642 includes steps S6421 to S6423, wherein:

[0200] Step S6421: Determine a second difference between the average weight and the minimum weight.

[0201] Here, the difference between the average weight and the minimum weight is taken as the second difference.

[0202] Step S6422: Determine a third difference between the maximum weight and the average weight.

[0203] Here, the difference between the maximum weight and the average weight is taken as the third difference.

[0204] Step S6423: Determine the second weight corresponding to the coating sub-area based on the second difference, the third difference, and the first weight.

[0205] The second weight may be determined by the second ratio, the third ratio, a weighted / logarithmic / exponential combination of the second / third ratios, the mean / variance / mean squared error between the second ratio and the third ratio, or a weighted / logarithmic / exponential combination of the mean / variance / mean squared error. For example, the minimum value between the second ratio and the third ratio is used as the second weight.

[0206] In some embodiments, the second weight W2 can be determined by the following formula (1-6), namely: W2=min{R2, R3} (1-6);

[0207] Wherein, R2 is the second ratio, and R3 is the third ratio.

[0208] In this way, the second weight is determined based on the maximum weight, the minimum weight, the average weight and the first weight, which improves the accuracy of the second weight and thus improves the accuracy of the coating quality of the sub-area.

[0209] Step S643: Determine the coating quality of the coating sub-area based on the first weight, the average weight, and the second weight.

[0210] Here, the coating quality may include but is not limited to the presence or absence of abnormalities. During implementation, each weight can be compared with its corresponding threshold value to determine the coating quality of the coating sub-area. The threshold values ​​corresponding to different weights may be different. For example, the threshold value corresponding to the first weight may be the first threshold value T1. If the first weight is within the range of [T1-S1, T1+S1], it indicates that the first weight is normal, where S1 is the first degree of deviation; the threshold value corresponding to the average weight may be the second threshold value T2. If the average weight is within the range of [T2-S2, T2+S2], it indicates that the average weight is normal, where S2 is the second degree of deviation; the threshold value corresponding to the second weight may be the third threshold value T3. If the second weight is within the range of [T3-S3, T3+S3], it indicates that the second weight is normal, where S3 is the third degree of deviation. S1~S3 may be different.

[0211] In some embodiments, step S643 includes steps S6431 to S6433, wherein:

[0212] Step S6431: Determine a deviation between the third weight and the corresponding threshold.

[0213] Here, the third weight includes the first weight, the average weight, and the second weight. Different third weights correspond to different deviation values, that is, the deviation value includes a first deviation value between the first weight and the corresponding threshold value, a second deviation value between the average weight and the corresponding threshold value, and a third deviation value between the second weight and the corresponding threshold value.

[0214] Step S6432: When the deviation value meets the preset condition, determine that there is no abnormality in the coating quality of the coating sub-area.

[0215] Here, the preset condition can be any suitable condition. For example, whether the deviation value is within the corresponding deviation range. During implementation, if each deviation value is within the corresponding deviation range, then the coating quality of the coating sub-area is characterized as not having an abnormality. That is, the first deviation value is within the corresponding deviation range ([-S1, S1]), the second deviation value is within the corresponding deviation range ([-S2, S2]), and the third deviation value is also within the corresponding deviation range ([-S3, S3]).

[0216] Step S6433: When the deviation value does not meet the preset condition, it is determined that the coating quality of the coating sub-area is abnormal.

[0217] Here, if at least one deviation value is not within the corresponding deviation range, then it is characterized that the coating quality of the coating sub-area is abnormal. For example, if the first deviation value, the second deviation value, and / or the third deviation value are not within the corresponding deviation range, it is determined that the coating quality of the coating sub-area is abnormal. During implementation, the cause of the quality abnormality can be located based on the coating speed, pressure, temperature, etc. of the coating equipment.

[0218] In this way, the coating quality of each sub-area is determined to be abnormal based on the different weights and corresponding thresholds of the sub-area. This not only allows the sub-area with quality abnormalities to be located quickly and effectively, thereby improving the coating production efficiency, but also reduces the possibility of the outflow of electrodes with coating abnormalities.

[0219] In the disclosed embodiment, the coating quality of each coating sub-area is determined separately according to the coating weight data and partition information corresponding to each coating sub-area, thereby improving the accuracy of the coating quality of each sub-area. It can not only quickly and effectively locate whether there are sub-areas with quality abnormalities, thereby improving the coating production efficiency, but also reduce the possibility of outflow of electrodes with coating abnormalities, thereby ensuring the coating quality of the electrode surface in the subsequent electrode production process, and further ensuring the capacity, life and safety of the battery.

[0220] FIG7 is a third schematic diagram of a coating method according to an embodiment of the present disclosure. As shown in FIG7 , the method includes steps S701 to S708, wherein:

[0221] Step S701: obtaining coating weight data corresponding to the electrode piece collected by a thickness gauge (corresponding to the aforementioned collection device);

[0222] Here, the coating weight data can be stored in a temporary weight variable or a weight variable. During implementation, if the electrode does not have a film reel number, the coating weight data is stored in the temporary weight variable; otherwise, it is stored in the weight variable. The film reel number refers to the identification information of the electrode, which may include but is not limited to a number or name. In some embodiments, to prevent memory overflow, it is necessary to periodically clear or destroy the temporary weight variable.

[0223] Step S702: determine whether data downtime filtering is enabled. If so, proceed to step S703; otherwise, proceed to step S704.

[0224] Here, data downtime filtering means filtering the data collected by the thickness gauge if the coating equipment is down.

[0225] Step S703, determine whether the coating speed is greater than 0, if so, proceed to step S704, otherwise, proceed to step S708;

[0226] Here, if the coating speed is 0, it indicates that no coating is performed. In this case, there is no need to perform further processing on the coating weight data.

[0227] Step S704: determining a reference weight corresponding to the electrode piece based on the weight of the substrate corresponding to the electrode piece and the weight of the coating corresponding to the electrode piece;

[0228] Here, the reference weight can be the average of the weight of the substrate and the weight of the coating. The coating weight includes the coating weight of surface A and the coating weight of surfaces A+B. During implementation, if the non-thinning area of ​​surface A is determined, the coating weight corresponding to the electrode piece is the coating weight of surface A; if the non-thinning area of ​​surface B is determined, the coating weight corresponding to the electrode piece is the coating weight of surfaces A+B. In some embodiments, the determination of the non-thinning areas of surfaces A and B can be performed simultaneously.

[0229] Step S705: updating the coating weight data based on the reference weight to obtain updated coating weight data;

[0230] Here, the weight corresponding to each detection position in the coating weight data is traversed. If the weight corresponding to the detection position is less than the reference weight, the weight corresponding to the detection position is set to the preset weight; otherwise, the weight corresponding to the detection position remains unchanged.

[0231] Step S706: determining a coating area from the electrode based on the updated coating weight data;

[0232] Here, the updated coating weight data is traversed. If the weight corresponding to a certain detection position is not the preset weight, the detection position is used as the left edge of the coating area; if the weight corresponding to a certain detection position becomes the preset weight, the detection position is multi-dimensionally used as the right edge of the coating area.

[0233] In some embodiments, if the initial scanning position of the acquisition device is opposite to the actual coating direction, the updated coating weight data needs to be reverse processed to determine the coating area based on the reverse processed coating weight data.

[0234] Step S707: determining the non-thinned area from the coating area based on the attribute information of the electrode;

[0235] Here, the attribute information of the electrode may include, but is not limited to, attribute information of the spot area, attribute information of the thinned area, etc. The attribute information of the thinned area may include, for example, the width of the thinned area, and the attribute information of the spot area may include, for example, the radius of the spot area. Using this attribute information, the non-thinned area is determined from the coated area. During implementation, the width of the non-thinned area is no greater than the width of the coated area. In some embodiments, the width of the non-thinned area = the width of the coated area - 2*the radius of the spot area - 2*the width of the thinned area.

[0236] Step S708, end.

[0237] FIG8 is a fourth schematic diagram of a coating method according to an embodiment of the present disclosure. As shown in FIG8 , the method includes steps S801 to S813, wherein:

[0238] Step S801: obtaining coating weight data corresponding to the electrode piece collected by a thickness gauge (corresponding to the aforementioned collection device);

[0239] Step S802: determine whether data downtime filtering is enabled. If so, proceed to step S803; otherwise, proceed to step S804.

[0240] Step S803, determine whether the coating speed is greater than 0, if so, proceed to step S804, otherwise, proceed to step S813;

[0241] Step S804: determining a reference weight corresponding to the electrode piece based on the weight of the substrate corresponding to the electrode piece and the weight of the coating corresponding to the electrode piece;

[0242] Step S805: updating the coating weight data based on the reference weight to obtain updated coating weight data;

[0243] Step S806: determining a coating area from the electrode based on the updated coating weight data;

[0244] Step S807: determining the non-thinned area from the coating area based on the attribute information of the electrode;

[0245] Step S808: Determine whether data shutdown filtering is enabled. If so, proceed to step S809; otherwise, proceed to step S810.

[0246] Here, the coating weight data corresponding to the non-skimmed area can be stored in a temporary partition variable or a partition variable. During implementation, if the electrode does not have a film roll number, the coating weight data corresponding to the non-skimmed area is stored in the temporary partition variable; otherwise, it is stored in the partition variable. In some embodiments, to prevent memory overflow, it is necessary to periodically clear or destroy the temporary weight variable.

[0247] Step S809: determine whether the coating parameters meet the preset conditions. If so, proceed to step S813; otherwise, proceed to step S810;

[0248] Here, the coating parameters may include but are not limited to the coating speed, the state of the solenoid valve, etc. The solenoid valve is an industrial device controlled by electromagnetics. It is an automated basic component used to control fluids. It belongs to an actuator and is used in industrial control systems to adjust the direction, flow, speed and other parameters of the medium. During implementation, by adjusting the state of the solenoid valve, the working mode of the coating head of the coating equipment can be adjusted. The working mode of the coating head may include but is not limited to the feed mode and the retract mode. The feed mode indicates that the coating head is coating, and the retract mode indicates that the coating head stops coating. The preset condition may be that the coating speed is less than the preset speed and the solenoid valve is 0, that is, the working mode of the coating head is the retract mode. The preset speed may be any suitable speed, for example, 15 meters per minute.

[0249] Step S810: Divide the non-thinned area into at least one coating sub-area;

[0250] Step S811: Based on the coating weight data corresponding to each coating sub-area, determine the average weight of each coating sub-area (corresponding to the aforementioned partition information);

[0251] Here, the coating quality of each coating sub-area is determined based on the average weight of each coating sub-area, the threshold weight, and the weight corresponding to each detection position included. During implementation, please refer to the specific implementation of the aforementioned step S64. In some embodiments, the average weight, current coating speed, pressure, temperature, etc. can be stored to facilitate subsequent analysis of the cause of abnormal coating quality in the coating sub-area.

[0252] Step S812: Display the average weight of each coating sub-area.

[0253] Here, the first interface may be used to display the average weight of each coating sub-area. During implementation, reference may be made to the specific implementation of the aforementioned steps S161 to S162.

[0254] Step S813, end.

[0255] Based on the above embodiment, the present disclosure further provides a coating system. FIG9 is a schematic diagram of the composition structure of a coating system provided in the present disclosure. As shown in FIG9 , the coating system 90 includes a control device 91 and a collection device 92, wherein:

[0256] The collecting device 92 is used to collect coating weight data corresponding to the electrode; wherein the electrode includes a coating area and a blank area, and the coating area is coated with an active material coating;

[0257] The control device 91 is used to determine the coating area from the electrode based on the coating weight data and the reference weight corresponding to the electrode; wherein the coating area includes a non-thinned area and a thinned area, and the coating thickness of the thinned area is less than the coating thickness of the non-thinned area; based on the attribute information of the electrode, the non-thinned area is determined from the coating area.

[0258] Here, the collection device can be any suitable device capable of collecting coating data, such as a thickness gauge, a weight detector, an area density meter, etc. During implementation, the collection device is communicatively connected to the control device.

[0259] The control device can be any suitable device, for example, a PLC, a host computer, or a combination of a PLC and a host computer. The method for determining the coating area can refer to the specific implementation of the aforementioned step S12. The method for determining the non-thinning area can refer to the specific implementation of the aforementioned step S13.

[0260] In some embodiments, the control device 91 is further used to: divide the non-thinning area into at least one coating sub-area; and for each coating sub-area, determine the partition information corresponding to the coating sub-area based on the coating weight data corresponding to the coating sub-area.

[0261] Here, the partition information can be any appropriate information, such as average weight, threshold weight, etc. In implementation, the division of the non-thinned area and the partition information corresponding to the coating sub-area can refer to the specific implementation of the aforementioned steps S151 to S152.

[0262] In some embodiments, the coating system 90 also includes a display device; the control device 91 is also used to: for each coating sub-area in the non-thinning area, based on the coating weight data corresponding to the coating sub-area, determine the partition information corresponding to the coating sub-area; the display device is used to display the partition information corresponding to each coating sub-area.

[0263] Here, the display device can be any suitable device capable of realizing the display function. For example, a host computer with a display screen. During implementation, the control device 91 communicates with the display device and transmits the partition information corresponding to each coating sub-area to the display device for display. In some embodiments, the display device is used to display the first interface, the second interface, the third interface, etc. Wherein, the display of the first interface can refer to the specific implementation of the aforementioned steps S161 to S162. The display of the second interface can refer to the specific implementation of the aforementioned step S171. The display of the third interface can refer to the specific implementation of the aforementioned step S181.

[0264] In this way, on the one hand, the partition information corresponding to each sub-area is determined according to the coating weight data corresponding to each coating sub-area, thereby improving the accuracy of the partition information; on the other hand, by displaying the partition information corresponding to each coating sub-area in real time, the coating situation of each sub-area is more intuitively reflected, so that it is possible to quickly and effectively locate whether there is a sub-area with abnormal coating quality.

[0265] In some embodiments, the control device 91 is further used to: for each coating sub-area in the non-thinning area, determine the coating quality of the coating sub-area based on the coating weight data corresponding to the coating sub-area and the partition information corresponding to the coating sub-area.

[0266] Here, the non-thinning area can be divided into any number of coating sub-areas. The partition information corresponding to the coating sub-areas may include average weight. The coating quality may include, but is not limited to, the presence or absence of abnormalities. In implementation, the method for determining the coating quality of the coating sub-area can refer to the specific embodiment of the aforementioned step S64.

[0267] In the embodiment of the present disclosure, the effective non-thinning area is determined by collecting the coating weight data corresponding to the electrode, the reference weight corresponding to the electrode and the attribute information of the electrode collected by the collection device. Compared with the edge inspection of the non-thinning area through the extreme value offset algorithm, the accuracy of the non-thinning area is improved.

[0268] It should be noted that, in the embodiments of the present disclosure, if the above method is implemented in the form of a software function module and sold or used as an independent product, it can also be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the embodiment of the present disclosure is essentially or the part that contributes to the relevant technology can be embodied in the form of a software product, which is stored in a storage medium and includes a number of instructions for enabling a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the methods of each embodiment of the present disclosure. The aforementioned storage medium includes various media that can store program codes, such as a U disk, a mobile hard disk, a read-only memory (ROM), a magnetic disk or an optical disk. In this way, the embodiments of the present disclosure are not limited to any specific combination of hardware and software.

[0269] An embodiment of the present disclosure provides a computer device including a memory and a processor, wherein the memory stores a computer program that can be run on the processor, and the above method is implemented when the processor executes the computer program.

[0270] The present disclosure provides a computer-readable storage medium having a computer program stored thereon, which implements the above method when executed by a processor. The computer-readable storage medium may be transient or non-transient.

[0271] The present disclosure provides a computer program product, including a computer program or instructions, which implement some or all of the steps in the above method when executed by a processor. The computer program product can be implemented in hardware, software, or a combination thereof. In one optional embodiment, the computer program product is embodied as a computer storage medium. In another optional embodiment, the computer program product is embodied as a software product, such as a software development kit (SDK).

[0272] It should be noted that FIG10 is a schematic diagram of the hardware entity of a computer device provided in an embodiment of the present disclosure. As shown in FIG10 , the hardware entity of the computer device 1000 includes: a controller 1001, a communication interface 1002, and a memory 1003, wherein:

[0273] The controller 1001 generally controls the overall operation of the computer device 1000. In practice, the controller 1001 may be any suitable controller, such as a PLC.

[0274] The communication interface 1002 enables the computer device to communicate with other terminals or servers through a network.

[0275] The memory 1003 is configured to store instructions and applications executable by the controller 1001 and to cache data to be processed or processed by the controller 1001 and various modules in the computer device 1000 (e.g., image data, audio data, voice communication data, and video communication data). This can be implemented using flash memory (FLASH) or random access memory (RAM). Data can be transmitted between the controller 1001, the communication interface 1002, and the memory 1003 via the bus 1004.

[0276] It should be noted that the description of the above storage medium and device embodiments is similar to the description of the above method embodiments and has similar beneficial effects as the method embodiments. For technical details not disclosed in the storage medium and device embodiments of the present disclosure, please refer to the description of the method embodiments of the present disclosure for understanding.

[0277] It should be understood that references to "one embodiment" or "an embodiment" throughout this specification mean that specific features, structures, or characteristics associated with the embodiment are included in at least one embodiment of the present disclosure. Therefore, the appearance of "in one embodiment" or "in an embodiment" throughout this specification does not necessarily refer to the same embodiment. Furthermore, these specific features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. It should be understood that in the various embodiments of the present disclosure, the order of execution of the above-mentioned processes does not necessarily indicate a precedence in execution. The execution order of each process should be determined by its function and inherent logic and should not constitute any limitation on the implementation of the embodiments of the present disclosure. The above-mentioned numbers of the embodiments of the present disclosure are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments. It should be noted that, in this document, the terms "comprise," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus comprising a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus. Without further limitation, the phrase "comprises an..." does not preclude the presence of other identical elements in the process, method, article, or apparatus comprising such elements.

[0278] In the several embodiments provided in the present disclosure, it should be understood that the disclosed devices and methods can be implemented in other ways. The device embodiments described above are merely schematic. For example, the division of the unit is merely a logical function division. In actual implementation, there may be other division methods, such as: multiple units or components can be combined, or can be integrated into another system, or some features can be ignored or not executed. In addition, the coupling, direct coupling, or communication connection between the components shown or discussed can be through some interfaces, and the indirect coupling or communication connection of the devices or units can be electrical, mechanical or other forms.

[0279] The units described above as separate components may or may not be physically separate, and the components shown as units may or may not be physical units; they may be located in one place or distributed across multiple network units; some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment. In addition, the various functional units in the embodiments of the present disclosure may all be integrated into one processing unit, or each unit may be separately used as a unit, or two or more units may be integrated into one unit; the above-mentioned integrated units may be implemented in the form of hardware or in the form of hardware plus software functional units.

[0280] Those skilled in the art will understand that all or part of the steps of the above-mentioned method embodiments can be completed by hardware related to program instructions. The aforementioned program can be stored in a computer-readable storage medium. When the program is executed, it performs the steps of the above-mentioned method embodiments. The aforementioned storage medium includes various media that can store program codes, such as mobile storage devices, read-only memories (ROMs), magnetic disks or optical disks. Alternatively, if the above-mentioned integrated unit of the present disclosure is implemented in the form of a software function module and sold or used as an independent product, it can also be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present disclosure, or the part that contributes to the relevant technology, can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions for enabling a computer device (which can be a personal computer, server, or network device, etc.) to execute all or part of the methods of the various embodiments of the present disclosure. The aforementioned storage medium includes various media that can store program codes, such as mobile storage devices, ROMs, magnetic disks or optical disks.

[0281] The above is only an embodiment of the present disclosure, but the protection scope of the present disclosure is not limited thereto. Any technician familiar with the technical field can easily think of changes or replacements within the technical scope disclosed in the present disclosure, and they should all be covered by the protection scope of the present disclosure.

[0282] It should be noted that the specific embodiments of the present disclosure can be manufactured or used in industry.

Claims

1. A coating method, comprising: Obtaining coating weight data corresponding to the electrode; wherein the electrode comprises a coating area and a blank area, and the coating area is coated with an active material coating; Determining the coating area from the electrode piece based on the coating weight data and a reference weight corresponding to the electrode piece; wherein the coating area includes a skived area and a non-skived area, and the coating thickness of the skived area is less than the coating thickness of the non-skived area; The non-thinned area is determined from the coated area based on the property information of the pole piece.

2. The method according to claim 1, wherein The determining the coating area from the electrode piece based on the coating weight data and the reference weight corresponding to the electrode piece includes: Determining a reference weight corresponding to the pole piece based on the weight of the substrate corresponding to the pole piece and the weight of the coating corresponding to the pole piece; Based on the reference weight corresponding to the electrode piece, the coating weight data is updated to obtain updated coating weight data; The coating area is determined from the pole piece based on the updated coating weight data.

3. The method according to claim 2, wherein: The determining of the reference weight corresponding to the pole piece based on the weight of the substrate corresponding to the pole piece and the weight of the coating corresponding to the pole piece includes: Determining the sum of the weight of the substrate and the weight of the coating; wherein the weight of the coating includes one of the following: the weight of single-sided coating and the weight of double-sided coating; Based on the sum, a reference weight corresponding to the pole piece is determined.

4. The method according to claim 2 or 3, wherein: The coating weight data includes the weight corresponding to at least one detection position in the electrode piece, and the updated coating weight data includes the target weight corresponding to each detection position; The updating of the coating weight data based on the reference weight corresponding to the electrode piece to obtain updated coating weight data includes: For the weight corresponding to each detection position in the pole piece, a target weight corresponding to the detection position is determined based on the weight corresponding to the detection position and a reference weight corresponding to the pole piece.

5. The method according to claim 4, wherein The determining of the target weight corresponding to the detection position based on the weight corresponding to the detection position and the reference weight corresponding to the pole piece includes at least one of the following: In the case where the weight corresponding to the detection position is less than the reference weight corresponding to the electrode piece, the preset weight is used as the target weight corresponding to the detection position; In the case that the weight corresponding to the detection position is not less than the reference weight corresponding to the pole piece, the weight corresponding to the detection position is used as the target weight corresponding to the detection position.

6. The method according to any one of claims 1 to 5, wherein: The attribute information of the pole piece includes at least one of the following: attribute information of the thinned area, attribute information of the light spot area; The determining the non-thinned area from the coating area based on the property information of the electrode piece includes: When the attribute information of the electrode includes attribute information of the thinned area and attribute information of the light spot area, the area formed by translating the boundary lines on both sides of the coating area toward the middle by a first length is used as the non-thinned area; wherein the first length includes the width of the thinned area and the radius of the light spot area; In the case where the attribute information of the electrode includes the attribute information of the thinned area, the area formed by translating the boundary lines on both sides of the coating area toward the middle by a second length is used as the non-thinned area; wherein the second length includes the width of the thinned area; When the attribute information of the pole piece includes the attribute information of the light spot area, the area formed by shifting the boundary lines on both sides of the coating area toward the middle by a third length is used as the non-thinning area; wherein the third length includes the radius of the light spot area.

7. The method according to any one of claims 1 to 6, wherein: The method further comprises: Dividing the non-skimmed area into at least one coating sub-area; For each coating sub-area, based on the coating weight data corresponding to the coating sub-area, the partition information corresponding to the coating sub-area is determined.

8. The method according to any one of claims 1 to 7, wherein: The method further comprises: For each coating sub-area in the non-skimmed area, the coating quality of the coating sub-area is determined based on the coating weight data corresponding to the coating sub-area and the partition information corresponding to the coating sub-area.

9. The method according to claim 8, wherein The coating weight data corresponding to the coating sub-area includes the weight corresponding to at least one detection position, and the partition information of the coating sub-area includes the average weight; The determining of the coating quality of the coating sub-area based on the coating weight data corresponding to the coating sub-area and the partition information corresponding to the coating sub-area includes: determining a first weight corresponding to the coating sub-area based on the weight corresponding to each of the detection positions and the average weight; Determining a second weight corresponding to the coating sub-area based on a threshold weight, the average weight, and the first weight; wherein the threshold weight is determined based on the weight corresponding to each of the detection positions; The coating quality of the coating film sub-area is determined based on the first weight, the average weight, and the second weight.

10. The method according to claim 9, wherein: The determining, based on the weight corresponding to each of the detection positions and the average weight, of the first weight corresponding to the coating sub-area includes: respectively determining a first difference between the weight corresponding to each of the detection positions and the average weight; Based on each first difference and the total weight corresponding to the coating sub-area, a first weight corresponding to the coating sub-area is determined; wherein the total weight represents the total weight included in the coating weight data corresponding to the coating sub-area.

11. The method according to claim 9 or 10, wherein: The threshold weight includes a maximum weight and a minimum weight; The determining, based on the threshold weight, the average weight, and the first weight, of a second weight corresponding to the coating sub-area includes: determining a second difference between the average weight and the minimum weight; determining a third difference between the maximum weight and the average weight; A second weight corresponding to the coating film sub-area is determined based on the second difference, the third difference, and the first weight.

12. The method according to any one of claims 9 to 11, wherein: The determining the coating quality of the coating sub-area based on the first weight, the average weight, and the second weight includes: determining a deviation value between a third weight and a corresponding threshold value; wherein the third weight includes the first weight, the average weight, and the second weight; When the deviation value satisfies a preset condition, determining that there is no abnormality in the coating quality of the coating sub-area; When the deviation value does not satisfy the preset condition, it is determined that the coating quality of the coating sub-area is abnormal.

13. The method according to any one of claims 1 to 12, wherein The method further comprises: Display a first interface; wherein the first interface includes a display area; In response to receiving the partition information corresponding to each coating sub-area in the non-thinned area of ​​the pole piece, the partition information corresponding to each coating sub-area in the non-thinned area of ​​the pole piece is displayed in the display area.

14. The method according to claim 13, wherein The display area includes a first display sub-area and a second display sub-area; The displaying of the partition information corresponding to each coating sub-area in the non-thinned area of ​​the electrode in the display area includes: In the first display sub-area, the partition information corresponding to each coating sub-area in the non-thinned area of ​​the electrode is displayed in a first display mode; In the second display sub-area, the partition information corresponding to each coating sub-area in at least one historical non-thinned area of ​​the pole piece is displayed in a second display manner.

15. The method according to claim 13 or 14, wherein: The first interface also includes a first setting control, and the method further includes: In response to the triggering operation of the first setting control, a second interface is displayed; wherein, the second interface includes a property setting control, and the property setting control is used to set the property information of the pole piece, and the property information of the pole piece includes at least one of the following: property information of the thinning area, and property information of the spot area.

16. The method according to any one of claims 13 to 15, wherein: The first interface also includes a second setting control, and the method further includes: In response to the triggering operation of the second setting control, a third interface is displayed; wherein, the third interface includes a substrate setting control and a coating weight setting control, the substrate setting control is used to set the weight of the substrate corresponding to the electrode, and the coating weight setting control is used to set the weight of the coating corresponding to the electrode.

17. A coating system comprising: A collection device for collecting coating weight data corresponding to the electrode; wherein the electrode comprises a coating area and a blank area, and the coating area is coated with an active material coating; A control device is used to determine the coating area from the pole piece based on the coating weight data and the reference weight corresponding to the pole piece; wherein the coating area includes a non-thinned area and a thinned area, and the coating thickness of the thinned area is less than the coating thickness of the non-thinned area; based on the attribute information of the pole piece, the non-thinned area is determined from the coating area.

18. The system according to claim 17, wherein: The system further comprises a display device, wherein: The control device is further configured to: determine, for each coating sub-area in the non-skimmed area, partition information corresponding to the coating sub-area based on coating weight data corresponding to the coating sub-area; The display device is used to display each partition information.

19. A computer device comprising a processor and a memory, wherein the memory stores a computer program that can be run on the processor, and when the processor executes the computer program Follow these steps: Obtain the coating weight data corresponding to the electrode; wherein, The electrode comprises a coating area and a blank area, wherein the coating area is coated with an active material coating; Determining the coating area from the electrode piece based on the coating weight data and a reference weight corresponding to the electrode piece; wherein the coating area includes a skived area and a non-skived area, and the coating thickness of the skived area is less than the coating thickness of the non-skived area; The non-thinned area is determined from the coated area based on the property information of the pole piece.

20. A computer-readable storage medium having a computer program stored thereon, wherein when the computer program is executed by a processor, the computer program implements the following steps: Obtain the coating weight data corresponding to the electrode; wherein, The electrode comprises a coating area and a blank area, wherein the coating area is coated with an active material coating; Determining the coating area from the electrode piece based on the coating weight data and a reference weight corresponding to the electrode piece; wherein the coating area includes a skived area and a non-skived area, and the coating thickness of the skived area is less than the coating thickness of the non-skived area; The non-thinned area is determined from the coated area based on the property information of the pole piece.

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