Membrane abnormal position identification method, system and equipment and storage medium

Abstract

The invention belongs to the technical field of battery cell manufacturing, and discloses a diaphragm abnormal position identification method, system and device and a storage medium. The method comprises the following steps: carrying out coating quality detection on a coating film area in a to-be-detected film, wherein the film comprises at least one coating film area; quality abnormal information is determined based on the quality detection result, wherein the quality abnormal information comprises a coating film area where the coating quality abnormal area is located and an abnormal starting position and an abnormal ending position of the coating quality abnormal area; an identification signal is sent to identification equipment based on the quality abnormal information, and the identification signal is used for indicating the identification equipment to print an abnormal starting identification and an abnormal ending identification at the abnormal starting position and the abnormal ending position corresponding to a non-coating film area of the film respectively, the content of the abnormal start identifier and the abnormal end identifier indicates the coating film area where the coating quality abnormal area is located. According to the method, the number of identification equipment used for identifying the coating quality abnormal area can be reduced, and the production cost is reduced.

Description

Technical Field

[0001] The present application relates to the field of battery cell manufacturing technology, and in particular to a method, system, device and storage medium for identifying abnormal positions of diaphragms. Background Art

[0002] Electrode film coating is a key step in the manufacturing process of lithium-ion batteries, which involves evenly coating the active material on the current collector to form the electrode. Coating quality inspection is a very important quality control step, which ensures that the coating indicators of the electrode film meet the design requirements, thereby ensuring the performance and consistency of the battery.

[0003] In the related art, a corresponding laser is generally set for each coated film area in the diaphragm, and the quality abnormality area is marked on the corresponding coated film area by the laser. Therefore, when producing a diaphragm with multiple coated film areas, the support of multiple lasers is required, which leads to excessively high production costs.

[0004] The above contents are only used to assist in understanding the technical solution of the present application and do not constitute an admission that the above contents are prior art. Summary of the invention

[0005] The main purpose of the present application is to provide a method, system, device and storage medium for marking abnormal positions of diaphragms, which can reduce the number of marking devices used to mark areas with abnormal coating quality, thereby reducing production costs.

[0006] In a first aspect, the present application provides a method for identifying an abnormal position of a diaphragm, which is performed by a detection device, and the method comprises the following steps: Performing coating quality inspection on a coating film area in a membrane to be inspected, wherein the membrane includes at least one coating film area; Determine quality abnormality information based on the quality detection result, wherein the quality abnormality information includes a coating film area where a coating quality abnormality region is located, and an abnormal starting position and an abnormal ending position of the coating quality abnormality region; An identification signal is sent to an identification device based on the quality abnormality information, and the identification signal is used to instruct the identification device to print an abnormal start mark and an abnormal end mark respectively at the non-coated film area of ​​the film corresponding to the abnormal start position and the abnormal end position, and the contents of the abnormal start mark and the abnormal end mark indicate the coated film area where the coating quality abnormal area is located.

[0007] In an embodiment of the present application, a coating quality inspection is performed on the coating film area in the membrane to be inspected, and quality abnormality information is determined based on the quality inspection result. Since the quality abnormality information includes the coating film area where the coating quality abnormal area is located, as well as the abnormal starting position and abnormal ending position of the coating quality abnormal area, an identification signal is sent to the identification device based on the quality abnormality information, instructing the identification device to print an abnormal starting mark and an abnormal ending mark at the abnormal starting position and abnormal ending position corresponding to the non-coated film area of ​​the membrane. Moreover, the contents of the abnormal starting mark and the abnormal ending mark also indicate the coating film area where the coating quality abnormal area is located, so the membrane section where the coating quality abnormal area is located can be determined from the membrane based on the abnormal starting mark and the abnormal ending mark, and then based on the coating film area indicated by the contents of the abnormal starting mark and the abnormal ending mark, the coating quality abnormal area, that is, the overlapping area of ​​the coating film area and the membrane section, can be located. Therefore, this abnormal position identification scheme for the diaphragm can accurately identify the specific position of the coating quality abnormal area in the diaphragm, and no matter which coating film area the coating quality abnormal area exists in, the mark is printed on the non-coating film area of ​​the diaphragm. Then, one identification device can be used to identify the coating quality abnormal areas of multiple coating film areas, and there is no need to set up an identification device for each coating film area, thereby reducing the number of identification devices used to identify the coating quality abnormal areas and reducing production costs.

[0008] In some embodiments, sending an identification signal to an identification device based on the abnormal quality information includes: Determine a first time point at which the abnormal starting position passes through the identification device and a second time point at which the abnormal ending position passes through the identification device; Based on the first time point and the second time point, the identification signal is sent to the identification device, and the identification signal is used to instruct the identification device to print the abnormal start mark in the non-coated film area at the first time point, and to print the abnormal end mark in the non-coated film area at the second time point.

[0009] Since the first time point is the time point when the abnormal starting position passes the identification device, and the second time point is the time point when the abnormal ending position passes the identification device, an identification signal is sent to the identification device to instruct the identification device to print an abnormal starting mark in the non-coated film area at the first time point and to print an abnormal ending mark in the non-coated film area at the second time point. Then, the abnormal starting mark and the abnormal ending mark just correspond to the abnormal starting position and the abnormal ending position of the coating quality abnormal area, which is convenient for the subsequent accurate positioning of the coating quality abnormal area based on the abnormal starting position and the abnormal ending position.

[0010] In some embodiments, determining a first time point at which the abnormal starting position passes through the identification device and a second time point at which the abnormal ending position passes through the identification device includes: Determine the transmission time required for any position in the film to be transmitted from the detection device to the identification device according to the distance between the detection device and the identification device and the transmission speed of the film; The first time point is determined based on a third time point when the abnormal starting position passes through the detection device and the transmission duration, and the second time point is determined based on a fourth time point when the abnormal ending position passes through the detection device and the transmission duration.

[0011] Since the third time point is the time point when the abnormal starting position passes through the detection device, the transmission duration is the time required for any position in the membrane to be transmitted from the detection device to the identification device, that is, the time required for the abnormal starting position to be transmitted from the detection device to the identification device, therefore, based on the third time point and the transmission duration, the first time point when the abnormal starting position passes through the identification device can be accurately determined. Similarly, since the fourth time point is the time point when the abnormal ending position passes through the detection device, the transmission duration is also the time required for the abnormal ending position to be transmitted from the detection device to the identification device, therefore, based on the fourth time point and the transmission duration, the second time point when the abnormal ending position passes through the identification device can be accurately determined.

[0012] In some embodiments, the sending the identification signal to the identification device based on the first time point and the second time point includes: sending a first identification signal to the identification device at the first time point, and sending a second identification signal to the identification device at the second time point; The first identification signal is used to instruct the identification device to print the abnormal start identification in the non-coated film area, and the second identification signal is used to instruct the identification device to print the abnormal end identification in the non-coated film area.

[0013] Since the first time point is the time point when the abnormal starting position of the coating quality abnormal area passes through the identification device, therefore, a first identification signal is sent to the identification device at the first time point, and the abnormal starting mark printed by the identification device in response to the first identification signal just corresponds to the abnormal starting position. Similarly, since the second time point is the time point when the abnormal ending position of the coating quality abnormal area passes through the identification device, therefore, a second identification signal is sent to the identification device at the second time point, and the abnormal ending mark printed by the identification device in response to the second identification signal just corresponds to the abnormal ending position. This ensures that the abnormal starting mark and abnormal ending mark identified by the identification device can accurately reflect the position of the coating quality abnormal area.

[0014] In some embodiments, the sending the identification signal to the identification device based on the first time point and the second time point includes: Sending a third identification signal carrying the first time point and a fourth identification signal carrying the second time point to the identification device; The third identification signal is used to instruct the identification device to print the abnormal start identification in the non-coated film area at the first time point, and the fourth identification signal is used to instruct the identification device to print the abnormal end identification in the non-coated film area at the second time point.

[0015] By carrying the first time point at which the abnormal starting position passes through the identification device in the third identification signal, the third identification signal is sent to the identification device, and the identification device can know that the abnormal starting position passes through the first time point of the identification device, so that the abnormal starting mark can be printed in the non-coated film area at the first time point, so that the printed abnormal starting mark just corresponds to the abnormal starting position. Similarly, by carrying the second time point at which the abnormal ending position passes through the identification device in the fourth identification signal, the fourth identification signal is sent to the identification device, and the identification device can know that the abnormal ending position passes through the second time point of the identification device, so that the abnormal ending mark can be printed in the non-coated film area at the second time point, so that the printed abnormal ending mark just corresponds to the abnormal ending position. This ensures that the abnormal starting mark and abnormal ending mark identified by the identification device can accurately reflect the position of the coating quality abnormal area.

[0016] In some embodiments, determining the quality abnormality information based on the quality detection result includes: For any coating film area, if a target number of detection points appear in succession among multiple detection points in this round of detection that do not meet the reference mass range, the continuous detection points that do not meet the reference mass range are determined as abnormal points; Determine the abnormal starting position of the coating quality abnormal area based on the positions of multiple detection points of the front wheel detection, the front wheel detection is a round of detection before the current round of detection, and the abnormal point does not exist during the detection; The abnormal end position of the coating quality abnormal area is determined based on the positions of multiple detection points of the rear wheel detection, which is a round of detection after the current round of detection and in which the abnormal point does not exist.

[0017] Since this round of detection has a continuous target number of abnormal points, it means that there are coating quality abnormalities at the position of this round of detection. Therefore, the area between the previous round of detection before this round of detection and without abnormal points and this round of detection may have coating quality abnormalities. Similarly, there may also be coating quality abnormalities between the previous round of detection after this round of detection and without abnormal points and this round of detection. In this case, based on the positions of multiple detection points of the front wheel detection, the abnormal starting position of the coating quality abnormal area is determined, and based on the positions of multiple detection points of the rear wheel detection, the abnormal ending position of the coating quality abnormal area is determined, thereby avoiding missed detection of the coating quality abnormal area and improving the accuracy of determining the coating quality abnormal area.

[0018] In some embodiments, the determining of the abnormal starting position of the coating quality abnormal area based on the positions of the plurality of detection points detected by the front wheel includes: Determine the position of the last detection point among the multiple detection points detected by the front wheel as the abnormal starting position of the coating quality abnormal area; The method of determining the abnormal end position of the coating quality abnormal area based on the positions of the plurality of detection points detected by the rear wheel includes: The position of the first detection point among the plurality of detection points of the rear wheel detection is determined as the abnormal end position of the coating quality abnormal area.

[0019] Since there are no abnormal points in the front wheel detection, it means that there are no coating quality abnormalities at the positions of the front wheel detection. Similarly, since there are no abnormal points in the rear wheel detection, it means that there are no coating quality abnormalities at the positions of the rear wheel detection. In this case, the position of the last detection point among the multiple detection points of the front wheel detection is determined as the abnormal starting position of the coating quality abnormal area, and the position of the first detection point among the multiple detection points of the rear wheel detection is determined as the abnormal ending position of the coating quality abnormal area, so that the position of the coating quality abnormal area can be more accurately determined, and the accuracy of determining the coating quality abnormal area can be improved.

[0020] In some embodiments, the non-coated film area includes the edge ear area of ​​the film. Then, no matter which coated film area the coating quality abnormal area exists in, the mark is printed on the edge ear area of ​​the film, and the marking range of one marking device can cover the edge ear area. Therefore, one marking device can realize the marking of the coating quality abnormal area of ​​multiple coated film areas, thereby reducing the number of marking devices used to mark the coating quality abnormal area and reducing production costs.

[0021] In some embodiments, the abnormal start mark and the abnormal end mark include a two-dimensional code mark and / or a text mark, and the contents of the two-dimensional code mark and the text mark indicate the coating film area where the coating quality abnormal area is located. The abnormal start mark and the abnormal end mark are designed as two-dimensional code marks, which is convenient for subsequent equipment to identify and locate the abnormal start mark and the abnormal end mark. The abnormal start mark and the abnormal end mark are designed as text marks, which is convenient for coating technicians to identify and locate. If the abnormal start mark and the abnormal end mark include not only a two-dimensional code mark, but also a text mark, it is not only conducive to the subsequent equipment to identify and locate the abnormal start mark and the abnormal end mark, but also conducive to the identification and positioning of the coating technicians, which is more friendly to machines and people, and can improve the efficiency of identifying and locating coating quality abnormal areas.

[0022] In a second aspect, the present application provides another method for identifying an abnormal position of a diaphragm, which is performed by an identification device, and the method comprises the following steps: Receiving an identification signal from a detection device, wherein the identification signal is sent by the detection device based on quality abnormality information of a film to be detected, wherein the film includes at least one coating film area, and the quality abnormality information includes the coating film area where the coating quality abnormal area is located, and an abnormal starting position and an abnormal ending position of the coating quality abnormal area; In response to the identification signal, an abnormal start identification and an abnormal end identification are printed respectively on the non-coated film area of ​​the film corresponding to the abnormal start position and the abnormal end position, and the contents of the abnormal start identification and the abnormal end identification indicate the coated film area where the coating quality abnormal area is located.

[0023] In the embodiment of the present application, since the quality abnormality information includes the coating film area where the coating quality abnormality area is located, and the abnormal starting position and abnormal ending position of the coating quality abnormality area, the identification device receives the identification signal sent by the detection device based on the quality abnormality information, and prints the abnormal starting mark and abnormal ending mark at the abnormal starting position and abnormal ending position corresponding to the non-coating film area of ​​the film in response to the identification signal. Moreover, the contents of the abnormal starting mark and the abnormal ending mark also indicate the coating film area where the coating quality abnormality area is located, so the film interval where the coating quality abnormality area is located can be determined from the film based on the abnormal starting mark and the abnormal ending mark, and then based on the coating film area indicated by the contents of the abnormal starting mark and the abnormal ending mark, the coating quality abnormality area, that is, the overlapping area of ​​the coating film area and the film interval, can be located. Therefore, this abnormal position identification scheme for the diaphragm can accurately identify the specific position of the coating quality abnormal area in the diaphragm, and no matter which coating film area the coating quality abnormal area exists in, the mark is printed in the non-coating film area of ​​the diaphragm. Then, one identification device can be used to identify the coating quality abnormal areas of multiple coating film areas, and there is no need to set up an identification device for each coating film area, thereby reducing the number of identification devices used to identify the coating quality abnormal areas and reducing production costs.

[0024] In some embodiments, in response to the identification signal, printing an abnormal start identification and an abnormal end identification at the non-coated film area of ​​the film corresponding to the abnormal start position and the abnormal end position, respectively, comprises: In response to a first identification signal, printing the abnormal start identification on the non-coated film area of ​​the film, the first identification signal is sent by the detection device at a first time point, and the first time point is the time point when the abnormal start position passes through the identification device; In response to a second identification signal, the abnormal end identification is printed on the non-coated film area of ​​the film, the second identification signal is sent by the detection device at a second time point, and the second time point is the time point when the abnormal end position passes the identification device.

[0025] Since the first identification signal is sent by the detection device at the first time point, and the first time point is the time point when the abnormal starting position of the coating quality abnormal area passes through the identification device, the identification device prints the abnormal starting mark in response to the first identification signal, and the abnormal starting mark just corresponds to the abnormal starting position. Similarly, since the second identification signal is sent by the detection device at the second time point, and the second time point is the time point when the abnormal ending position of the coating quality abnormal area passes through the identification device, the identification device prints the abnormal ending mark in response to the second identification signal, and the abnormal ending mark just corresponds to the abnormal ending position. This ensures that the abnormal starting mark and abnormal ending mark identified by the identification device can accurately reflect the position of the coating quality abnormal area.

[0026] In some embodiments, in response to the identification signal, printing an abnormal start identification and an abnormal end identification at the non-coated film area of ​​the film corresponding to the abnormal start position and the abnormal end position, respectively, comprises: In response to a third identification signal carrying a first time point, waiting until the first time point is when the abnormal start identification is printed on the non-coated film area of ​​the film, the first time point being the time point when the abnormal start position passes through the identification device, and the third identification signal is sent by the detection device before the first time point; In response to a fourth identification signal carrying a second time point, the abnormal end identification is printed on the non-coated film area of ​​the film at the second time point, the second time point is the time point when the abnormal end position passes the identification device, and the fourth identification signal is sent by the detection device before the second time point.

[0027] Since the third identification signal is sent by the detection device before the first time point, and the first time point is the time point when the abnormal starting position passes through the identification device, the identification device responds to the third identification signal carrying the first time point, and waits until the first time point to print the abnormal starting mark in the non-coated film area of ​​the membrane, and the printed abnormal starting mark just corresponds to the abnormal starting position. Similarly, since the fourth identification signal is sent by the detection device before the second time point, and the second time point is the time point when the abnormal ending position passes through the identification device, the identification device responds to the fourth identification signal carrying the second time point, and waits until the second time point to print the abnormal ending mark in the non-coated film area of ​​the membrane, and the printed abnormal ending mark just corresponds to the abnormal ending position. This ensures that the abnormal starting mark and abnormal ending mark identified by the identification device can accurately reflect the location of the coating quality abnormal area.

[0028] In some embodiments, in response to the identification signal, printing an abnormal start identification and an abnormal end identification at the non-coated film area of ​​the film corresponding to the abnormal start position and the abnormal end position, respectively, comprises: In response to the identification signal, the abnormal start identification and the abnormal end identification are respectively printed on the side ear area of ​​the diaphragm corresponding to the abnormal start position and the abnormal end position.

[0029] In the embodiment of the present application, no matter in which coating film area the coating quality abnormal area exists, the mark is printed on the edge ear area of ​​the diaphragm, so the marking range of one marking device can cover the edge ear area. Therefore, one marking device can be used to mark the coating quality abnormal areas of multiple coating film areas, thereby reducing the number of marking devices used to mark the coating quality abnormal areas and reducing production costs.

[0030] In some embodiments, the abnormal start mark and the abnormal end mark include a two-dimensional code mark and / or a text mark, and the contents of the two-dimensional code mark and the text mark indicate the coating film area where the coating quality abnormal area is located.

[0031] The abnormal start mark and abnormal end mark are designed as QR code marks, which is convenient for subsequent equipment to identify and locate the abnormal start mark and abnormal end mark. The abnormal start mark and abnormal end mark are designed as text marks, which is convenient for coating technicians to identify and locate. If the abnormal start mark and abnormal end mark include not only QR code marks but also text marks, it will be beneficial for subsequent equipment to identify and locate the abnormal start mark and abnormal end mark, and it will also be beneficial for coating technicians to identify and locate, which is more friendly to machines and people, and can improve the efficiency of identifying and locating abnormal areas of coating quality.

[0032] In some embodiments, the identification device includes an identification printing module and an identification detection module. After the abnormal start mark and the abnormal end mark are printed on the non-coated film area of ​​the film sheet corresponding to the abnormal start position and the abnormal end position respectively in response to the identification signal, the method further includes: Performing identification detection on the non-coated film area of ​​the film sheet by the identification detection module; In the case where the mark is not detected, a prompt message is output, wherein the prompt message is used to prompt that the mark is not printed successfully.

[0033] After the label is printed by the label printing module in the labeling device, the label detection module in the labeling device performs label detection on the non-coated film area of ​​the membrane. When the label is not detected, a prompt message is output to indicate that the label has not been successfully printed. Then, at the position where the label has not been successfully printed, the technician can be prompted to locate the area with abnormal coating quality based on other methods, thereby avoiding missed detection of the area with abnormal coating quality and improving the accuracy of determining the area with abnormal coating quality.

[0034] In a third aspect, to achieve the above-mentioned purpose, the present application provides a membrane abnormal position identification system, the system comprising a membrane transmission device, a detection device and an identification device; The membrane transmission device is used to carry the membrane to be detected and drive the membrane to move along the length direction of the membrane; the membrane includes at least one coated membrane area; The detection device is located above the film transmission device and scans and detects the film along the film width direction; the detection device is used to detect the coating quality of the coating film area in the film, determine the abnormal starting position and abnormal ending position of the coating quality abnormal area, and send an identification signal to the identification device; The identification device is located on one side of the film transmission device and has a preset distance with the detection device in the length direction of the film; the identification device is used to respond to the identification signal and print an abnormal start mark and an abnormal end mark respectively at the non-coated film area of ​​the film corresponding to the abnormal start position and the abnormal end position, and the contents of the abnormal start mark and the abnormal end mark also indicate the coated film area where the coating quality abnormal area is located.

[0035] In an embodiment of the present application, the detection device performs coating quality detection on the coating film area in the membrane to be detected, determines the abnormal starting position and abnormal ending position of the coating quality abnormal area, and sends an identification signal to the identification device. The identification device responds to the identification signal and prints an abnormal starting mark and an abnormal ending mark at the abnormal starting position and abnormal ending position corresponding to the non-coated film area of ​​the membrane. Moreover, the content of the abnormal starting mark and the abnormal ending mark also indicates the coating film area where the coating quality abnormal area is located, so the membrane section where the coating quality abnormal area is located can be determined from the membrane based on the abnormal starting mark and the abnormal ending mark. Then, based on the coating film area indicated by the content of the abnormal starting mark and the abnormal ending mark, the coating quality abnormal area, that is, the overlapping area of ​​the coating film area and the membrane section, can be located. Therefore, this abnormal position identification scheme for the diaphragm can accurately identify the specific position of the coating quality abnormal area in the diaphragm, and no matter which coating film area the coating quality abnormal area exists in, the mark is printed in the non-coating film area of ​​the diaphragm. Then, one identification device can be used to identify the coating quality abnormal areas of multiple coating film areas, and there is no need to set up an identification device for each coating film area, thereby reducing the number of identification devices used to identify the coating quality abnormal areas and reducing production costs.

[0036] In some embodiments, the system further comprises a cutting device; The cutting device is used to detect the mark in the non-coated film area of ​​the film; In response to detecting the abnormal start mark, controlling the winding device to stop to display the abnormal start position of the coating quality abnormal area in the film; In response to detecting the abnormal end mark, controlling the winding device to stop to display the abnormal end position of the coating quality abnormal area in the film; Based on the abnormal start position, the abnormal end position, and the coating film area indicated by the contents of the abnormal start mark and the abnormal end mark, the coating quality abnormal area is located from the coating film area in the film sheet.

[0037] In an embodiment of the present application, the cutting device detects the mark in the non-coated film area of ​​the film, and in response to detecting the abnormal start mark, the winding device is controlled to stop, so that the abnormal start position of the coating quality abnormal area in the film can be displayed. And, in response to detecting the abnormal end mark, the winding device is controlled to stop again, so that the abnormal end position of the coating quality abnormal area in the film can be displayed. Between the abnormal start position and the abnormal end position is the film interval where the coating quality abnormal area is located. Combined with the coating film area indicated by the content of the abnormal start mark and the abnormal end mark, the coating quality abnormal area can be quickly located from the coating film area in the film, so as to determine whether to cut the coating quality abnormal area based on the coating condition of the coating quality abnormal area.

[0038] In the fourth aspect, in order to achieve the above-mentioned purpose, the present application also proposes a detection device, which includes: a memory, a processor, and a diaphragm abnormal position identification program stored in the memory and executable on the processor, and the diaphragm abnormal position identification program is configured to implement the steps of the diaphragm abnormal position identification method as described above.

[0039] In the fifth aspect, in order to achieve the above-mentioned purpose, the present application also proposes an identification device, which includes: a memory, a processor, and a diaphragm abnormal position identification program stored in the memory and executable on the processor, and the diaphragm abnormal position identification program is configured to implement the steps of the diaphragm abnormal position identification method as described above.

[0040] In a sixth aspect, in order to achieve the above-mentioned purpose, the present application also proposes a storage medium, on which a diaphragm abnormal position identification program is stored, and when the diaphragm abnormal position identification program is executed by a processor, the steps of the diaphragm abnormal position identification method described above are implemented.

[0041] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present application. Moreover, the same reference numerals are used throughout the drawings to represent the same components. In the drawings: Figure 1 A schematic flow chart of a method for identifying abnormal position of a diaphragm performed by a detection device provided in some embodiments of the present application; Figure 2 A schematic diagram of a diaphragm provided in some embodiments of the present application; Figure 3 A schematic diagram of an abnormal coating quality area provided in some embodiments of the present application; Figure 4 A schematic diagram of a marking printing position provided in some embodiments of the present application; Figure 5 A schematic flow chart of a method for identifying abnormal position of a diaphragm performed by an identification device provided in some embodiments of the present application; Figure 6 A schematic diagram of the module structure of a diaphragm abnormal position identification system provided in some embodiments of the present application.

[0043] The reference numerals in the specific implementation manner are as follows: 20: diaphragm; 201: coating film area; 202: non-coated film area; 30: Scanning path of the detection device; 301: detection point; 302: abnormal point; 40: Abnormal coating quality area; 401: abnormal start identifier; 402: Abnormal end mark.

[0044] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0045] The following embodiments of the technical solution of the present application are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0046] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0047] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0048] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0049] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, indicating that there may be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0050] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0051] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the embodiments of the present application.

[0052] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0053] In the manufacturing process of lithium-ion batteries, the coating quality of the electrode membrane is very critical. The uniformity and accuracy of the coating directly affect the performance, consistency and safety of the battery. Therefore, it is necessary to perform coating quality detection on the coating film area in the membrane, and use a laser to mark the area with abnormal coating quality, so as to locate and cut the area with abnormal coating quality in the later stage. Considering that there may be multiple coating film areas in the membrane, each coating film area may have abnormal coating quality, and the identification range of the laser is limited and cannot cover multiple coating film areas of the membrane. Therefore, a corresponding laser is set for each coating film area, and the laser is used to mark the area with abnormal coating quality in the corresponding coating film area. This will result in high cost of purchasing lasers, and the debugging time of multiple laser combinations will also increase. In addition, if the varieties of multiple coating film areas in the membrane are inconsistent, multiple lasers may not be compatible for use.

[0054] In the scheme of the present application, the coating quality detection is performed on the coating film area in the membrane to be detected, and the quality abnormality information is determined based on the quality detection result. Since the quality abnormality information includes the coating film area where the coating quality abnormal area is located, as well as the abnormal starting position and abnormal ending position of the coating quality abnormal area, an identification signal is sent to the identification device based on the quality abnormality information, instructing the identification device to print the abnormal starting mark and abnormal ending mark at the abnormal starting position and abnormal ending position corresponding to the non-coated film area of ​​the membrane. Moreover, the content of the abnormal starting mark and the abnormal ending mark also indicates the coating film area where the coating quality abnormal area is located, so the membrane section where the coating quality abnormal area is located can be determined from the membrane based on the abnormal starting mark and the abnormal ending mark, and then based on the coating film area indicated by the content of the abnormal starting mark and the abnormal ending mark, the coating quality abnormal area, that is, the overlapping area of ​​the coating film area and the membrane section, can be accurately located.

[0055] This abnormal position identification scheme of the membrane can accurately identify the specific position of the coating quality abnormal area in the membrane on the one hand, and on the other hand, no matter which coating film area the coating quality abnormal area exists in, the identification is printed in the same area of ​​the membrane, that is, the non-coating film area, so the identification range of one identification device can cover the non-coating film area. Therefore, one identification device can be used to identify the coating quality abnormal areas of multiple coating film areas, without setting up identification devices for each coating film area. This not only reduces the cost of purchasing identification equipment, but also reduces the difficulty of debugging the identification equipment, and can reduce the debugging time of the identification equipment, thereby reducing production costs in many aspects.

[0056] The abnormal position identification scheme of the membrane disclosed in the embodiment of the present application can be applied to a variety of scenarios. For example, the scenario of coating weight detection of positive electrode membrane or negative electrode membrane. Or, the scenario of rolling thickness detection of positive electrode membrane or negative electrode membrane, etc. Of course, it can also be applied to other coating quality detection scenarios, and the embodiment of the present application does not limit this.

[0057] Please refer to Figure 1 , Figure 1 A schematic flow chart of a method for identifying abnormal position of a diaphragm performed by a detection device provided in some embodiments of the present application includes the following steps: S110, performing coating quality inspection on a coating film area in a membrane to be inspected, wherein the membrane includes at least one coating film area; S120, determining quality abnormality information based on the quality detection result, the quality abnormality information including the coating film area where the coating quality abnormal area is located, and the abnormal starting position and abnormal ending position of the coating quality abnormal area; S130, sending an identification signal to the identification device based on the quality abnormality information, the identification signal is used to instruct the identification device to print an abnormal start mark and an abnormal end mark at the abnormal start position and abnormal end position corresponding to the non-coated film area of ​​the film, respectively, and the contents of the abnormal start mark and the abnormal end mark indicate the coated film area where the coating quality abnormal area is located.

[0058] Among them, the diaphragm is a thin sheet of material containing at least one coated film area. For example, the diaphragm includes the electrode diaphragm used in the battery manufacturing process, such as the positive electrode diaphragm, the negative electrode diaphragm, etc. Coating is a process of evenly applying a liquid or slurry to the surface of a substrate. The coated film area refers to the area on the diaphragm that has been treated by a coating process. Taking the electrode diaphragm as an example, the coated film area refers to the area formed by evenly applying a layer of active substances on the electrode substrate. These active substances determine the performance and characteristics of the battery. The non-coated film area refers to the area on the diaphragm where no active substances are coated. In this application, printing an abnormal start mark and an abnormal end mark in the non-coated film area will not affect the electrochemical properties of the electrode diaphragm. In addition, there may be multiple non-coated film areas in the diaphragm. In this application, printing a mark in the non-coated film area refers to printing a mark in the same non-coated film area. Figure 2 A schematic diagram of a membrane provided in some embodiments of the present application. Figure 2 The film 20 includes three coated film areas 201 and four non-coated film areas 202, and any non-coated film area can be selected for printing a logo.

[0059] Coating quality inspection refers to the evaluation of the performance and characteristics of the coating film area to ensure that it meets the predetermined standards and requirements. Taking the coating quality inspection of electrode membranes as an example, it includes thickness measurement, surface roughness inspection, density inspection, electrochemical performance inspection, etc. Through these inspection contents, the performance and quality of the coating film area can be comprehensively evaluated to ensure the high performance and reliability of the battery. In actual applications, the content of coating quality inspection can be selected according to needs.

[0060] Quality abnormality information refers to the problems found during the coating quality inspection process that do not meet the standards or expectations, including the coating film area where the coating quality abnormal area is located, as well as the abnormal starting position and abnormal ending position of the coating quality abnormal area. Of course, quality abnormality information can also include the nature of the quality abnormality, such as abnormal coating density, abnormal coating thickness, etc. Among them, the coating quality abnormal area refers to the part in the coating film area where there are quality problems. For example, areas with uneven coating density and inconsistent coating thickness. The abnormal starting position refers to the starting point of the coating quality abnormal area. The abnormal ending position refers to the end point of the coating quality abnormal area. The abnormal starting position and abnormal ending position are used to accurately locate the scope of the quality abnormal area, which is convenient for assessing the severity of quality problems and formulating solutions.

[0061] The marking device is a device used to print or mark a specific mark on a membrane. The marking device can be an inkjet printer, a laser, a labeling machine, etc. The marking signal is a marking instruction sent by the detection device to the marking device, which is used to instruct the marking device to perform the marking action. The abnormal start mark is a mark printed at the abnormal start position corresponding to the non-coated film area of ​​the membrane, which is used to clearly indicate the starting point of the coating quality abnormal area in the membrane. The abnormal end mark is a mark printed at the abnormal end position corresponding to the non-coated film area of ​​the membrane, which is used to clearly indicate the end point of the coating quality abnormal area in the membrane.

[0062] One point that needs to be explained is that the membrane section where the coating quality abnormal area is located can be determined only by the position of the abnormal start mark and the abnormal end mark, but because the membrane contains multiple coating film areas, it is impossible to determine which coating film area in the membrane section where the coating quality abnormal area is located. Therefore, the contents of the abnormal start mark and the abnormal end mark in the present application indicate the coating film area where the coating quality abnormal area is located. For example, each coating film area in the membrane has its own film area mark, and the abnormal start mark and the abnormal end mark include the mark of the coating film area where the coating quality abnormal area is located. In this way, based on the membrane section where the coating quality abnormal area is located and the mark of the coating film area, the coating quality abnormal area, that is, the overlapping area of ​​the membrane section and the coating film area, can be accurately located.

[0063] Taking the surface density detection of the electrode membrane as an example to illustrate the coating quality detection process, it includes placing the electrode membrane on the membrane transmission device, the membrane transmission device drives the membrane to move along the length direction of the membrane, and the surface density meter scans and detects the membrane along the width direction of the membrane, that is, scanning from one side of the electrode membrane along the width direction to the other side of the electrode membrane, and then scanning in the opposite direction, thereby forming a scanning path similar to a W shape. During the scanning process of the surface density meter, each scanning point is a detection point, and the surface density meter will record the surface density value of each detection point. Optionally, the surface density meter will also generate a surface density distribution map, showing the surface density values ​​at different positions on the membrane, so as to intuitively display the surface density distribution and facilitate the evaluation of the uniformity of the coating.

[0064] Based on the quality inspection results, the surface density meter determines the coating film area where the coating quality abnormality area is located, the abnormal starting position and the abnormal ending position of the coating quality abnormality area, and can send an identification signal to the identification device to instruct the identification device to print the abnormal starting position and the abnormal ending position of the non-coated film area of ​​the film sheet respectively.

[0065] Since there is a certain distance between the detection device and the marking device, when the detection device detects the abnormal starting position and abnormal ending position of the coating quality abnormal area, there is a certain distance between the abnormal starting position and abnormal ending position and the marking device. Therefore, the detection device needs to determine the exact time point when the abnormal starting position and abnormal ending position pass through the marking device, so that the marking device can print the abnormal starting mark and abnormal ending mark at the moment when the abnormal starting position and abnormal ending position pass through the marking device.

[0066] Accordingly, in some embodiments, sending an identification signal to an identification device based on quality abnormality information includes: determining a first time point when the abnormal starting position passes through the identification device and a second time point when the abnormal ending position passes through the identification device; and sending an identification signal to the identification device based on the first time point and the second time point. The identification signal is used to instruct the identification device to print an abnormal starting mark in the non-coated film area at the first time point, and to print an abnormal ending mark in the non-coated film area at the second time point. Since the first time point is the time point when the abnormal starting position passes through the identification device, and the second time point is the time point when the abnormal ending position passes through the identification device, the identification device prints an abnormal starting mark in the non-coated film area at the first time point, and prints an abnormal ending mark in the non-coated film area at the second time point, so that the abnormal starting mark and the abnormal ending mark just correspond to the abnormal starting position and the abnormal ending position of the coating quality abnormal area, which is convenient for accurately locating the coating quality abnormal area based on the abnormal starting position and the abnormal ending position.

[0067] In some embodiments, the detection device determines a first time point when the abnormal starting position passes through the identification device and a second time point when the abnormal ending position passes through the identification device, including: determining the transmission time required for any position in the membrane to be transmitted from the detection device to the identification device based on the distance between the detection device and the identification device and the transmission speed of the membrane; determining the first time point based on the third time point when the abnormal starting position passes through the detection device and the transmission time, and determining the second time point based on the fourth time point when the abnormal ending position passes through the detection device and the transmission time.

[0068] Since the third time point is the time point when the abnormal starting position passes through the detection device, the transmission duration is the time required for any position in the membrane to be transmitted from the detection device to the identification device, that is, the time required for the abnormal starting position to be transmitted from the detection device to the identification device, therefore, based on the third time point and the transmission duration, the first time point when the abnormal starting position passes through the identification device can be accurately determined. Similarly, since the fourth time point is the time point when the abnormal ending position passes through the detection device, the transmission duration is also the time required for the abnormal ending position to be transmitted from the detection device to the identification device, therefore, based on the fourth time point and the transmission duration, the second time point when the abnormal ending position passes through the identification device can be accurately determined.

[0069] The transmission time required for any position in the diaphragm to be transmitted from the detection device to the identification device is the ratio of the distance between the detection device and the identification device to the transmission speed of the diaphragm. The third time point when the abnormal starting position passes through the detection device is added to the transmission time, and the result is the first time point when the abnormal starting position passes through the identification device. The fourth time point when the abnormal ending position passes through the detection device is added to the transmission time, and the result is the second time point when the abnormal ending position passes through the identification device.

[0070] Optionally, the detection device sends the identification signal to the identification device based on the first time point and the second time point in at least two ways as follows, wherein the first way of sending the identification signal requires the identification device to print the identification immediately upon receiving the identification signal, so as to ensure the accuracy of the position of the printed abnormal start identification and abnormal end identification. The second way is to send the identification signal to the identification device in advance, requiring the identification device to delay printing, so as to ensure the accuracy of the position of the printed abnormal start identification and abnormal end identification.

[0071] The first type: the detection device sends a first identification signal to the identification device at a first time point, and sends a second identification signal to the identification device at a second time point; wherein the first identification signal is used to instruct the identification device to print an abnormal start identification in the non-coated film area, and the second identification signal is used to instruct the identification device to print an abnormal end identification in the non-coated film area. Since the first time point is the time point when the abnormal start position of the coating quality abnormal area passes through the identification device, the detection device sends the first identification signal to the identification device at the first time point, and the abnormal start identification printed by the identification device in response to the first identification signal just corresponds to the abnormal start position. Similarly, since the second time point is the time point when the abnormal end position of the coating quality abnormal area passes through the identification device, the detection device sends the second identification signal to the identification device at the second time point, and the abnormal end identification printed by the identification device in response to the second identification signal just corresponds to the abnormal end position. This ensures that the abnormal start identification and abnormal end identification identified by the identification device can accurately reflect the position of the coating quality abnormal area.

[0072] The second type: the detection device sends a third identification signal carrying a first time point and a fourth identification signal carrying a second time point to the identification device; wherein the third identification signal is used to instruct the identification device to print an abnormal start identification in the non-coated film area at the first time point, and the fourth identification signal is used to instruct the identification device to print an abnormal end identification in the non-coated film area at the second time point. By carrying the abnormal start position passing the first time point of the identification device in the third identification signal, the third identification signal is sent to the identification device, and the identification device can know that the abnormal start position passes the first time point of the identification device, so that the abnormal start identification can be printed in the non-coated film area at the first time point, so that the printed abnormal start identification just corresponds to the abnormal start position. Similarly, by carrying the abnormal end position passing the second time point of the identification device in the fourth identification signal, the fourth identification signal is sent to the identification device, and the identification device can know that the abnormal end position passes the second time point of the identification device, so that the abnormal end identification can be printed in the non-coated film area at the second time point, so that the printed abnormal end identification just corresponds to the abnormal end position. In this way, it is ensured that the abnormal start identification and abnormal end identification identified by the identification device can accurately reflect the position of the coating quality abnormal area.

[0073] For example, in response to receiving the third identification signal, the identification device records the first time point at which the abnormal start position in the third identification signal passes, and in response to the arrival of the first time point, prints the abnormal start identification. Similarly, in response to receiving the fourth identification signal, the identification device records the second time point at which the abnormal end position in the fourth identification signal passes, and in response to the arrival of the second time point, prints the abnormal end identification.

[0074] The quality test results of the diaphragm include the test results of multiple test points, among which there are test points that meet the reference quality range and test points that do not meet the reference quality range. The testing equipment needs to determine the coating quality abnormal area based on the test results of these test points. If the determined coating quality abnormal area is too large or too small, it will directly lead to over-killing or under-killing of the diaphragm. Only by accurately determining the location of the coating quality abnormal area can we avoid both material waste and omission of quality problems and improve the quality of the produced coated diaphragms.

[0075] To this end, in some embodiments, the detection device determines the quality abnormality information based on the quality detection results in the following manner: for any coating film area, if a continuous target number of detection points appear in multiple detection points in this round of detection that do not meet the reference quality range, the continuous detection points that do not meet the reference quality range are determined as abnormal points. Then, based on the positions of multiple detection points detected by the front wheel, the abnormal starting position of the coating quality abnormal area is determined, wherein the front wheel detection is a round of detection before the current round of detection, and there are no abnormal points during the detection. Then, based on the positions of multiple detection points detected by the rear wheel, the abnormal ending position of the coating quality abnormal area is determined, wherein the rear wheel detection is a round of detection after the current round of detection, and there are no abnormal points during the detection.

[0076] The reference quality range refers to a set of numerical ranges used to determine whether a product or material meets the standards during a specific quality inspection or evaluation process. For example, in the coating quality inspection of electrode membranes, the reference quality range can cover the range of indicators such as surface density, thickness, and surface roughness.

[0077] The specific value of the target number can be set to any value as needed. For example, the target number is four. In this way, if four consecutive detection points do not meet the reference quality range among the multiple detection points in this round of detection, these four consecutive detection points that do not meet the reference quality range are determined as abnormal points.

[0078] Exemplarily, for any coating film area, the detection device performs multiple rounds of scanning detection in the coating film area in sequence. Once any abnormal point is found in any round of detection, the detection device will determine the abnormal starting position of the coating quality abnormal area based on the positions of multiple detection points in the previous round of detection. Among them, the round of detection in which the abnormal point appears is the current round of detection described above, and the previous round of detection of this round of detection is the previous round of detection described above. The detection device then determines whether there are abnormal points in the next round of detection of this round of detection. If there are abnormal points in the next round of detection, it continues to determine whether there are abnormal points in the next round of detection until it is determined that there is no abnormal point in a round of detection. This round of detection is the rear wheel detection described above. The detection device will determine the abnormal end position of the coating quality abnormal area based on the positions of multiple detection points of the rear wheel detection.

[0079] Since this round of detection has a continuous target number of abnormal points, it means that there are coating quality abnormalities at the position of this round of detection. Therefore, the area between the previous round of detection before this round of detection and without abnormal points and this round of detection may have coating quality abnormalities. Similarly, there may also be coating quality abnormalities between the previous round of detection after this round of detection and without abnormal points and this round of detection. In this case, based on the positions of multiple detection points of the front wheel detection, the abnormal starting position of the coating quality abnormal area is determined, and based on the positions of multiple detection points of the rear wheel detection, the abnormal ending position of the coating quality abnormal area is determined, thereby avoiding missed detection of the coating quality abnormal area and improving the accuracy of determining the coating quality abnormal area.

[0080] In some embodiments, the detection device determines the abnormal starting position of the coating quality abnormal area based on the positions of multiple detection points detected by the front wheel, including: determining the position of the last detection point among the multiple detection points detected by the front wheel as the abnormal starting position of the coating quality abnormal area; and determines the abnormal ending position of the coating quality abnormal area based on the positions of the multiple detection points detected by the rear wheel, including: determining the position of the first detection point among the multiple detection points detected by the rear wheel as the abnormal ending position of the coating quality abnormal area.

[0081] Since there are no abnormal points in the front wheel detection, it means that there are no coating quality abnormalities at the positions of the front wheel detection. Similarly, since there are no abnormal points in the rear wheel detection, it means that there are no coating quality abnormalities at the positions of the rear wheel detection. In this case, the position of the last detection point among the multiple detection points of the front wheel detection is determined as the abnormal starting position of the coating quality abnormal area, and the position of the first detection point among the multiple detection points of the rear wheel detection is determined as the abnormal ending position of the coating quality abnormal area, so that the position of the coating quality abnormal area can be more accurately determined, and the accuracy of determining the coating quality abnormal area can be improved.

[0082] refer to Figure 3 , Figure 3 A schematic diagram of an abnormal coating quality area provided in some embodiments of the present application. Figure 3 The film 20 includes three coated film areas 201 and four non-coated film areas 202. A plurality of detection points 301 are provided on a scanning path 30 of the detection device. Figure 3 There are five rounds of detection in total, and there are abnormal points 302 in the second and third rounds of detection. Therefore, the abnormal starting position determined based on multiple detection points in the first round of detection is the border position on the left side of the coating quality abnormal area 40, and the abnormal ending position determined based on multiple detection points in the fourth round of detection is the border position on the right side of the coating quality abnormal area 40.

[0083] In some embodiments, the non-coated film area includes the edge ear area of ​​the diaphragm, and accordingly, the identification signal sent by the detection device to the identification device is used to instruct the identification device to print the abnormal start mark and the abnormal end mark at the abnormal start position and the abnormal end position corresponding to the edge ear area of ​​the diaphragm. In addition, since the diaphragm includes two edge ear areas, one of the edge ear areas is selected for printing the mark as needed. It should be noted that once the edge ear area for printing the mark is selected, the abnormal start mark and the abnormal end mark of all coating quality abnormal areas in the diaphragm are printed in the selected edge ear area. Then the identification range of one identification device can cover the edge ear area, so the identification of coating quality abnormal areas of multiple coated film areas can be achieved through one identification device, thereby reducing the number of identification devices used to identify coating quality abnormal areas and reducing production costs.

[0084] refer to Figure 4 , Figure 4 A schematic diagram of a logo printing position provided for some embodiments of the present application. The side ear area refers to the top and bottom non-coated film areas 202 in the membrane 20. The present application selects the bottom side ear area for printing the logo, and the abnormal start logo 401 and the abnormal end logo 402 are located in the side ear area.

[0085] In some embodiments, the abnormal start mark and the abnormal end mark include a two-dimensional code mark and / or a text mark, and the content of the two-dimensional code mark and the text mark indicates the coating film area where the coating quality abnormal area is located. The abnormal start mark and the abnormal end mark are designed as two-dimensional code marks, which is convenient for subsequent equipment to identify and locate the abnormal start mark and the abnormal end mark. The abnormal start mark and the abnormal end mark are designed as text marks, which is convenient for coating technicians to identify and locate. If the abnormal start mark and the abnormal end mark include not only a two-dimensional code mark, but also a text mark, it is not only conducive to the subsequent equipment to identify and locate the abnormal start mark and the abnormal end mark, but also conducive to the identification and positioning of the coating technicians, which is more friendly to machines and people, and can improve the efficiency of identifying and locating coating quality abnormal areas.

[0086] One point that needs to be explained is that, since in some possible implementations, both the upper and lower surfaces of the diaphragm need to be coated, the contents of the abnormal start mark and the abnormal end mark must not only indicate the coating film area where the coating quality abnormal area is located, but also indicate the coating surface where the coating quality abnormal area is located. For example, the diaphragm includes two surfaces, A and B, and each surface includes three coating film areas, and the three coating film areas are marked as 1, 2, and 3, respectively. If the coating quality abnormal area exists in the second coating film area on the A surface, then the contents of the abnormal start mark and the abnormal end mark include "A2". Of course, the abnormal start mark and the abnormal end mark may also include other contents, which are not limited in the embodiments of the present application.

[0087] Please refer to Figure 5 , Figure 5 A schematic flow chart of a method for identifying abnormal position of a membrane performed by an identification device provided in some embodiments of the present application, wherein the same contents as those in the above embodiments are referred to in the above embodiments and will not be repeated here. The method comprises the following steps: S510, receiving an identification signal from a detection device, the identification signal is sent by the detection device based on quality abnormality information of a membrane to be detected, the membrane includes at least one coating film area, the quality abnormality information includes the coating film area where the coating quality abnormal area is located, and the abnormal starting position and abnormal ending position of the coating quality abnormal area; S520, in response to the identification signal, printing an abnormal start identification and an abnormal end identification at the abnormal start position and abnormal end position corresponding to the non-coated film area of ​​the film sheet, respectively, the contents of the abnormal start identification and the abnormal end identification indicate the coated film area where the coating quality abnormal area is located.

[0088] In the embodiment of the present application, since the quality abnormality information includes the coating film area where the coating quality abnormality area is located, and the abnormal starting position and abnormal ending position of the coating quality abnormality area, the identification device receives the identification signal sent by the detection device based on the quality abnormality information, and prints the abnormal starting mark and abnormal ending mark at the abnormal starting position and abnormal ending position corresponding to the non-coating film area of ​​the film in response to the identification signal. Moreover, the contents of the abnormal starting mark and the abnormal ending mark also indicate the coating film area where the coating quality abnormality area is located, so the film interval where the coating quality abnormality area is located can be determined from the film based on the abnormal starting mark and the abnormal ending mark, and then based on the coating film area indicated by the contents of the abnormal starting mark and the abnormal ending mark, the coating quality abnormality area, that is, the overlapping area of ​​the coating film area and the film interval, can be located. Therefore, this abnormal position identification scheme for the diaphragm can accurately identify the specific position of the coating quality abnormal area in the diaphragm, and no matter which coating film area the coating quality abnormal area exists in, the mark is printed in the non-coating film area of ​​the diaphragm. Then, one identification device can be used to identify the coating quality abnormal areas of multiple coating film areas, and there is no need to set up an identification device for each coating film area, thereby reducing the number of identification devices used to identify the coating quality abnormal areas and reducing production costs.

[0089] In some embodiments, the identification device prints an abnormal start mark and an abnormal end mark at the abnormal start position and abnormal end position corresponding to the non-coated film area of ​​the film sheet in response to the identification signal, including: the identification device prints an abnormal start mark at the non-coated film area of ​​the film sheet in response to the first identification signal, the first identification signal is sent by the detection device at a first time point, and the first time point is the time point when the abnormal start position passes the identification device; in response to the second identification signal, the abnormal end mark is printed at the non-coated film area of ​​the film sheet, the second identification signal is sent by the detection device at a second time point, and the second time point is the time point when the abnormal end position passes the identification device. Since the first identification signal is sent by the detection device at the first time point, and the first time point is the time point when the abnormal start position of the coating quality abnormal area passes the identification device, the identification device prints the abnormal start mark in response to the first identification signal, and the abnormal start mark just corresponds to the abnormal start position. Similarly, since the second identification signal is sent by the detection device at the second time point, and the second time point is the time point when the abnormal end position of the coating quality abnormal area passes the identification device, the identification device prints the abnormal end mark in response to the second identification signal, and the abnormal end mark just corresponds to the abnormal end position. In this way, it is ensured that the abnormal start mark and abnormal end mark marked by the identification device can accurately reflect the position of the coating quality abnormal area.

[0090] In some embodiments, the identification device prints an abnormal start mark and an abnormal end mark at the non-coated film area of ​​the film sheet corresponding to the abnormal start position and the abnormal end position respectively in response to the identification signal, including: in response to the third identification signal carrying the first time point, wait until the first time point to print the abnormal start mark at the non-coated film area of ​​the film sheet, the first time point is the time point when the abnormal start position passes the identification device, and the third identification signal is sent by the detection device before the first time point; in response to the fourth identification signal carrying the second time point, wait until the second time point to print the abnormal end mark at the non-coated film area of ​​the film sheet, the second time point is the time point when the abnormal end position passes the identification device, and the fourth identification signal is sent by the detection device before the second time point. Since the third identification signal is sent by the detection device before the first time point, and the first time point is the time point when the abnormal start position passes the identification device, the identification device responds to the third identification signal carrying the first time point, waits until the first time point to print the abnormal start mark at the non-coated film area of ​​the film sheet, and the printed abnormal start mark just corresponds to the abnormal start position. Similarly, since the fourth identification signal is sent by the detection device before the second time point, and the second time point is the time point when the abnormal end position passes the identification device, the identification device responds to the fourth identification signal carrying the second time point, and waits until the second time point to print the abnormal end mark on the non-coated film area of ​​the film, and the printed abnormal end mark just corresponds to the abnormal end position. This ensures that the abnormal start mark and abnormal end mark marked by the identification device can accurately reflect the position of the coating quality abnormal area.

[0091] In some embodiments, the identification device responds to the identification signal, and prints an abnormal start mark and an abnormal end mark at the abnormal start position and abnormal end position corresponding to the non-coated film area of ​​the diaphragm, including: in response to the identification signal, printing an abnormal start mark and an abnormal end mark at the abnormal start position and abnormal end position corresponding to the side ear area of ​​the diaphragm. In the embodiment of the present application, no matter which coating film area the coating quality abnormal area exists in, the identification is printed in the side ear area of ​​the diaphragm, so the identification range of one identification device can cover the side ear area, so that the identification of the coating quality abnormal area of ​​multiple coating film areas can be realized through one identification device, thereby reducing the number of identification devices used to identify the coating quality abnormal area and reducing production costs.

[0092] In some embodiments, the abnormal start mark and abnormal end mark of the identification device include a two-dimensional code mark and / or a text mark, and the content of the two-dimensional code mark and the text mark indicates the coating film area where the coating quality abnormal area is located. The abnormal start mark and the abnormal end mark are designed as two-dimensional code marks, which is convenient for subsequent equipment to identify and locate the abnormal start mark and the abnormal end mark. The abnormal start mark and the abnormal end mark are designed as text marks, which is convenient for coating technicians to identify and locate. If the abnormal start mark and the abnormal end mark include not only a two-dimensional code mark, but also a text mark, it is not only conducive to the subsequent equipment to identify and locate the abnormal start mark and the abnormal end mark, but also conducive to the identification and positioning of the coating technicians, which is more friendly to machines and people, and can improve the efficiency of identifying and locating coating quality abnormal areas.

[0093] In some embodiments, the identification device includes an identification printing module and an identification detection module. The identification signal responds to the identification signal. After the abnormal start mark and the abnormal end mark are printed respectively at the abnormal start position and the abnormal end position corresponding to the non-coated film area of ​​the membrane, the non-coated film area of ​​the membrane is also subjected to identification detection by the identification detection module. If the identification is not detected, a prompt message is output, and the prompt message is used to prompt that the identification is not successfully printed.

[0094] Exemplarily, the identification device includes a laser engraving module, i.e., an identification printing module, for printing the identification. It also includes a barcode scanning gun module, i.e., an identification detection module, for detecting whether the identification is successfully printed. As required, the identification printing module and the identification detection module can be set at any position of the identification device, and the embodiment of the present application does not limit this.

[0095] After the label is printed by the label printing module in the labeling device, the label detection module in the labeling device performs label detection on the non-coated film area of ​​the membrane. When the label is not detected, a prompt message is output to indicate that the label has not been successfully printed. Then, at the position where the label has not been successfully printed, the technician can be prompted to locate the area with abnormal coating quality based on other methods, thereby avoiding missed detection of the area with abnormal coating quality and improving the accuracy of determining the area with abnormal coating quality.

[0096] Please refer to Figure 6 , Figure 6 A schematic diagram of the module structure of a membrane abnormal position identification system provided in some embodiments of the present application, wherein the membrane abnormal position identification system 600 includes a detection device 601, a membrane transmission device 602 and an identification device 603.

[0097] The membrane transmission device 602 is used to carry the membrane to be tested and drive the membrane to move along the length direction of the membrane. The membrane includes at least one coated membrane area.

[0098] The detection device 601 is located above the film transmission device 602 and scans the film along the width direction of the film. The detection device 601 is used to detect the coating quality of the coating film area in the film, determine the abnormal starting position and abnormal ending position of the coating quality abnormal area, and send an identification signal to the identification device 603.

[0099] The marking device 603 is located on one side of the film transmission device 602 and has a preset distance from the detection device 601 in the length direction of the film. The marking device 603 is used to print an abnormal start mark and an abnormal end mark at the abnormal start position and abnormal end position corresponding to the non-coated film area of ​​the film in response to the marking signal, and the contents of the abnormal start mark and the abnormal end mark also indicate the coated film area where the coating quality abnormal area is located.

[0100] Exemplarily, the film transmission device 602 includes an unwinding device and a rewinding device. The unwinding device is used to smoothly unwind the rolled film from the roll for subsequent coating, drying and other processes. The rewinding device is used to roll the film after coating, drying and other processes into a roll for subsequent storage, transportation and use.

[0101] Among them, the unwinding device, coating device, detection device 601, marking device 603 and winding device are connected in sequence, that is, the output end of the unwinding device leads the film through the guide roller and enters the coating device. The output end of the coating device leads the film through the guide roller and enters the measurement area of ​​the detection device 601. The output end of the detection device 601 leads the film through the guide roller and enters the marking device 603. The output end of the marking device 603 leads the film through the guide roller and enters the winding device.

[0102] In an embodiment of the present application, the detection device performs coating quality detection on the coating film area in the film to be detected, determines the abnormal starting position and abnormal ending position of the coating quality abnormal area, and sends an identification signal to the identification device. The identification device responds to the identification signal and prints an abnormal starting mark and an abnormal ending mark at the abnormal starting position and abnormal ending position corresponding to the non-coated film area of ​​the film. Moreover, the contents of the abnormal starting mark and the abnormal ending mark also indicate the coating film area where the coating quality abnormal area is located. Therefore, the film interval where the coating quality abnormal area is located can be determined from the film based on the abnormal starting mark and the abnormal ending mark. Then, based on the coating film area indicated by the contents of the abnormal starting mark and the abnormal ending mark, the coating quality abnormal area, that is, the overlapping area of ​​the coating film area and the film interval, can be located. Therefore, this abnormal position identification scheme for the diaphragm can accurately identify the specific position of the coating quality abnormal area in the diaphragm, and no matter which coating film area the coating quality abnormal area exists in, the mark is printed in the non-coating film area of ​​the diaphragm. Then, one identification device can be used to identify the coating quality abnormal areas of multiple coating film areas, and there is no need to set up an identification device for each coating film area, thereby reducing the number of identification devices used to identify the coating quality abnormal areas and reducing production costs.

[0103] In some embodiments, the film abnormal position identification system further includes a cutting device for detecting the identification in the non-coated film area of ​​the film. Accordingly, in response to detecting the abnormal start identification, the cutting device controls the winding device to stop to display the abnormal start position of the coating quality abnormal area in the film; in response to detecting the abnormal end identification, the winding device controls the winding device to stop to display the abnormal end position of the coating quality abnormal area in the film; based on the abnormal start position, the abnormal end position, and the coating film area indicated by the abnormal start identification and the abnormal end identification, the coating quality abnormal area is located from the coating film area in the film.

[0104] Exemplarily, a mark detection module is installed at the unwinding device of the cutting device. During the film transmission process, the mark detection module faces the non-coated film area of ​​the film. In response to detecting an abnormal start mark or an abnormal end mark, the mark detection module sends a stop signal to the winding device, and the winding device responds to the stop signal and controls the winding device to stop. Exemplarily, the cutting device can be a cold pressing device, a slitting device, or other equipment that needs to cut the coating quality abnormal area of ​​the film.

[0105] Exemplarily, the logo is printed on the side tab area of ​​the diaphragm, and accordingly, the cutting device is used to detect the logo in the side tab area of ​​the diaphragm. Accordingly, during the diaphragm transmission process, the logo detection module is always facing the side tab area of ​​the diaphragm.

[0106] In an embodiment of the present application, the cutting device detects the mark in the non-coated film area of ​​the film, and in response to detecting the abnormal start mark, the winding device is controlled to stop, so that the abnormal start position of the coating quality abnormal area in the film can be displayed. And, in response to detecting the abnormal end mark, the winding device is controlled to stop again, so that the abnormal end position of the coating quality abnormal area in the film can be displayed. Between the abnormal start position and the abnormal end position is the film interval where the coating quality abnormal area is located. Combined with the coating film area indicated by the content of the abnormal start mark and the abnormal end mark, the coating quality abnormal area can be quickly located from the coating film area in the film, so as to determine whether to cut the coating quality abnormal area based on the coating condition of the coating quality abnormal area.

[0107] For example, the treatment measures for the coating quality abnormality area can be determined in combination with other information, such as the test results of the detection equipment, the application scenario of the membrane, the type of coating material, etc., which are not limited in the embodiments of the present application.

[0108] In addition, an embodiment of the present application also proposes a detection device, which includes: a memory, a processor, and a diaphragm abnormal position identification program stored in the memory and executable on the processor, wherein the diaphragm abnormal position identification program is configured to implement the steps of the diaphragm abnormal position identification method described above.

[0109] In addition, an embodiment of the present application also proposes an identification device, which includes: a memory, a processor, and a diaphragm abnormal position identification program stored in the memory and executable on the processor, wherein the diaphragm abnormal position identification program is configured to implement the steps of the diaphragm abnormal position identification method described above.

[0110] In addition, an embodiment of the present application further proposes a storage medium, on which a diaphragm abnormal position identification program is stored. When the diaphragm abnormal position identification program is executed by a processor, the steps of the diaphragm abnormal position identification method as described above are implemented.

[0111] It should be noted that the workflow described above is merely illustrative and does not limit the scope of protection of the present application. In practical applications, technicians in this field can select part or all of it according to actual needs to achieve the purpose of the present embodiment, and no limitation is made here.

[0112] In addition, for technical details that are not described in detail in this embodiment, reference can be made to the abnormal position identification method of the diaphragm provided in any embodiment of the present application, and will not be repeated here.

[0113] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A method for marking abnormal position of a diaphragm, characterized in that: The method for identifying abnormal position of the diaphragm, which is performed by a detection device, includes: Performing coating quality inspection on a coating film area in a membrane to be inspected, wherein the membrane includes at least one coating film area; Determine quality abnormality information based on the quality detection result, wherein the quality abnormality information includes a coating film area where a coating quality abnormality region is located, and an abnormal starting position and an abnormal ending position of the coating quality abnormality region; Sending an identification signal to an identification device based on the quality abnormality information, wherein the identification signal is used to instruct the identification device to print an abnormal start mark and an abnormal end mark at the non-coated film area of ​​the film sheet corresponding to the abnormal start position and the abnormal end position, respectively, and the contents of the abnormal start mark and the abnormal end mark indicate the coated film area where the coating quality abnormal area is located; Wherein, sending an identification signal to an identification device based on the abnormal quality information includes: Determine a first time point at which the abnormal starting position passes through the identification device and a second time point at which the abnormal ending position passes through the identification device; Based on the first time point and the second time point, the identification signal is sent to the identification device, and the identification signal is used to instruct the identification device to print the abnormal start mark in the non-coated film area at the first time point, and to print the abnormal end mark in the non-coated film area at the second time point.

2. The method according to claim 1, characterized in that The determining a first time point at which the abnormal starting position passes through the identification device and a second time point at which the abnormal ending position passes through the identification device comprises: Determine the transmission time required for any position in the film to be transmitted from the detection device to the identification device according to the distance between the detection device and the identification device and the transmission speed of the film; The first time point is determined based on a third time point when the abnormal starting position passes through the detection device and the transmission duration, and the second time point is determined based on a fourth time point when the abnormal ending position passes through the detection device and the transmission duration.

3. The method according to claim 1, characterized in that The sending the identification signal to the identification device based on the first time point and the second time point includes: sending a first identification signal to the identification device at the first time point, and sending a second identification signal to the identification device at the second time point; The first identification signal is used to instruct the identification device to print the abnormal start identification in the non-coated film area, and the second identification signal is used to instruct the identification device to print the abnormal end identification in the non-coated film area.

4. The method according to claim 1, characterized in that The sending the identification signal to the identification device based on the first time point and the second time point includes: Sending a third identification signal carrying the first time point and a fourth identification signal carrying the second time point to the identification device; The third identification signal is used to instruct the identification device to print the abnormal start identification in the non-coated film area at the first time point, and the fourth identification signal is used to instruct the identification device to print the abnormal end identification in the non-coated film area at the second time point.

5. The method according to claim 1, characterized in that The determining of quality abnormality information based on the quality detection result includes: For any coating film area, if a target number of detection points appear in succession among multiple detection points in this round of detection that do not meet the reference mass range, the continuous detection points that do not meet the reference mass range are determined as abnormal points; Determine the abnormal starting position of the coating quality abnormal area based on the positions of multiple detection points of the front wheel detection, the front wheel detection is a round of detection before the current round of detection, and the abnormal point does not exist during the detection; The abnormal end position of the coating quality abnormal area is determined based on the positions of multiple detection points of the rear wheel detection, which is a round of detection after the current round of detection and in which the abnormal point does not exist.

6. The method according to claim 5, characterized in that The method of determining the abnormal starting position of the coating quality abnormal area based on the positions of the plurality of detection points detected by the front wheel includes: Determine the position of the last detection point among the multiple detection points detected by the front wheel as the abnormal starting position of the coating quality abnormal area; The method of determining the abnormal end position of the coating quality abnormal area based on the positions of the plurality of detection points detected by the rear wheel includes: The position of the first detection point among the plurality of detection points of the rear wheel detection is determined as the abnormal end position of the coating quality abnormal area.

7. The method according to claim 1, characterized in that The non-coated film area includes the edge tab area of ​​the diaphragm.

8. The method according to claim 1, characterized in that The abnormal start mark and the abnormal end mark include a two-dimensional code mark and / or a text mark, and the contents of the two-dimensional code mark and the text mark indicate the coating film area where the coating quality abnormal area is located.

9. A method for marking abnormal position of a diaphragm, characterized in that: Executed by a marking device, the diaphragm abnormal position marking method comprises: Receiving an identification signal from a detection device, wherein the identification signal is sent by the detection device based on quality abnormality information of a film to be detected, wherein the film includes at least one coating film area, and the quality abnormality information includes the coating film area where the coating quality abnormal area is located, and an abnormal starting position and an abnormal ending position of the coating quality abnormal area; In response to the identification signal, an abnormal start identification and an abnormal end identification are respectively printed at the non-coated film area of ​​the film corresponding to the abnormal start position and the abnormal end position, and the contents of the abnormal start identification and the abnormal end identification indicate the coated film area where the coating quality abnormal area is located; The process of the detection device sending the identification signal based on the quality abnormality information of the membrane to be detected includes: Determine a first time point at which the abnormal starting position passes through the identification device and a second time point at which the abnormal ending position passes through the identification device; Based on the first time point and the second time point, the identification signal is sent to the identification device, and the identification signal is used to instruct the identification device to print the abnormal start mark in the non-coated film area at the first time point, and to print the abnormal end mark in the non-coated film area at the second time point.

10. The method according to claim 9, characterized in that In response to the identification signal, printing an abnormal start identification and an abnormal end identification at the non-coated film area of ​​the film sheet corresponding to the abnormal start position and the abnormal end position respectively includes: printing the abnormal start mark on the non-coated film area of ​​the film in response to a first mark signal, wherein the first mark signal is sent by the detection device at the first time point; The abnormal end mark is printed on the non-coated film area of ​​the film in response to a second mark signal, wherein the second mark signal is sent by the detection device at the second time point.

11. The method according to claim 9, characterized in that In response to the identification signal, printing an abnormal start identification and an abnormal end identification at the non-coated film area of ​​the film sheet corresponding to the abnormal start position and the abnormal end position respectively includes: In response to a third identification signal carrying the first time point, waiting until the first time point to print the abnormal start identification on the non-coated film area of ​​the film, the third identification signal being sent by the detection device before the first time point; In response to a fourth identification signal carrying the second time point, the abnormal end identification is printed on the non-coated film area of ​​the film at the second time point, and the fourth identification signal is sent by the detection device before the second time point.

12. The method according to claim 9, characterized in that In response to the identification signal, printing an abnormal start identification and an abnormal end identification at the non-coated film area of ​​the film sheet corresponding to the abnormal start position and the abnormal end position respectively includes: In response to the identification signal, the abnormal start identification and the abnormal end identification are respectively printed on the side ear area of ​​the diaphragm corresponding to the abnormal start position and the abnormal end position.

13. The method according to claim 9, characterized in that The abnormal start mark and the abnormal end mark include a two-dimensional code mark and / or a text mark, and the contents of the two-dimensional code mark and the text mark indicate the coating film area where the coating quality abnormal area is located.

14. The method according to claim 9, characterized in that The identification device comprises an identification printing module and an identification detection module. After the abnormal start identification and the abnormal end identification are respectively printed on the non-coated film area of ​​the film corresponding to the abnormal start position and the abnormal end position in response to the identification signal, the method further comprises: Performing identification detection on the non-coated film area of ​​the film sheet by the identification detection module; In the case where the mark is not detected, a prompt message is output, wherein the prompt message is used to prompt that the mark is not printed successfully.

15. A diaphragm abnormal position identification system, characterized in that: The system includes a membrane transmission device, a detection device and a marking device; The membrane transmission device is used to carry the membrane to be detected and drive the membrane to move along the length direction of the membrane; the membrane includes at least one coated membrane area; The detection device is located above the film transmission device and scans and detects the film along the film width direction; the detection device is used to detect the coating quality of the coating film area in the film, determine the abnormal starting position and abnormal ending position of the coating quality abnormal area, and determine the first time point when the abnormal starting position passes through the identification device and the second time point when the abnormal ending position passes through the identification device; based on the first time point and the second time point, send an identification signal to the identification device; The identification device is located on one side of the film transmission device and has a preset distance with the detection device in the length direction of the film; the identification device is used to respond to the identification signal, print an abnormal start mark at the non-coated film area of ​​the film corresponding to the abnormal start position at the first time point, and print an abnormal end mark at the non-coated film area corresponding to the abnormal end position at the second time point, and the contents of the abnormal start mark and the abnormal end mark indicate the coated film area where the coating quality abnormal area is located.

16. The system of claim 15, wherein: The system also includes a cutting device; The cutting device is used to detect the mark in the non-coated film area of ​​the film; In response to detecting the abnormal start mark, controlling the winding device to stop to display the abnormal start position of the coating quality abnormal area in the film; In response to detecting the abnormal end mark, controlling the winding device to stop to display the abnormal end position of the coating quality abnormal area in the film; Based on the abnormal start position, the abnormal end position, and the coating film area indicated by the contents of the abnormal start mark and the abnormal end mark, the coating quality abnormal area is located from the coating film area in the film sheet.

17. A detection device, characterized in that: The device comprises: a memory, a processor, and a diaphragm abnormal position identification program stored in the memory and executable on the processor, wherein the diaphragm abnormal position identification program is configured to implement the steps of the diaphragm abnormal position identification method according to any one of claims 1 to 8.

18. A marking device, characterized in that: The device comprises: a memory, a processor, and a diaphragm abnormal position identification program stored in the memory and executable on the processor, wherein the diaphragm abnormal position identification program is configured to implement the steps of the diaphragm abnormal position identification method as described in any one of claims 9 to 14.

19. A storage medium, characterized in that: The storage medium stores a diaphragm abnormal position identification program, and when the diaphragm abnormal position identification program is executed by the processor, the steps of the diaphragm abnormal position identification method according to any one of claims 1 to 14 are implemented.

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