A method for processing a pole piece and a pole piece processing device

Abstract

The present application provides a method for processing a pole piece and a pole piece processing device. The method for processing a pole piece is applied to the pole piece processing device, and the processing method includes: setting a plurality of marking codes on the pole piece film roll in sequence; one of the plurality of marking codes is used as a target marking code; binding the target marking code and the target detection data corresponding to the target marking code; the target detection data is the detection data of the film roll corresponding to the target marking code in the pole piece film roll; in the process of winding the film roll corresponding to the target marking code, in response to an abnormality in the target detection data, the film roll corresponding to the target marking code is scrapped. Through the above method, the accuracy of scrapping can be improved to reduce the possibility of bad products flowing out, thereby improving the yield rate of the battery cell formed by the pole piece.

Description

Technical Field

[0001] The present application relates to the technical field of lithium battery preparation, and in particular to a method for processing a pole piece and a pole piece processing device. Background Art

[0002] With the development of the times, lithium batteries are widely used in energy systems such as hydropower, thermal power, wind power, or solar power, as well as electric vehicles or other electric equipment. In practice, when preparing lithium batteries, electrodes of corresponding specifications are prepared according to demand, and then the electrodes are wound to form battery cells to obtain corresponding lithium batteries. In the existing electrode processing method, when an abnormality is detected in the electrode film roll, the electrode film roll that needs to be scrapped is usually labeled by manually stopping the machine for labeling. This method has the risk of poor labeling position accuracy and the risk of the label falling off by itself, which makes the scrapping accuracy low, resulting in a higher possibility of bad products flowing out, and reducing the yield rate of the battery cell formed by the electrode. Summary of the Invention

[0003] The main technical problem solved by the present application is to provide a method and equipment for processing pole pieces, which can improve the accuracy of scrapping, thereby reducing the possibility of defective products flowing out and improving the yield rate of battery cells formed by the pole pieces.

[0004] In the first aspect, the present application provides a method for processing an electrode, which is applied to an electrode processing device, and the processing method includes: setting multiple marking codes in sequence on the electrode film roll; using one of the multiple marking codes as a target marking code; binding the target marking code and the target detection data corresponding to the target marking code; the target detection data is the detection data of the film roll corresponding to the target marking code in the electrode film roll; in the process of winding the film roll corresponding to the target marking code, in response to the abnormality of the target detection data, the film roll corresponding to the target marking code is scrapped.

[0005] In the technical solution of the embodiment of the present application, multiple marking codes are set on the electrode film roll at intervals in sequence during the preparation process of the electrode, and after the target detection data of the film roll corresponding to the target marking code in the electrode film roll is obtained, the target marking code is bound to the target detection data. Subsequently, when the electrode is wound, the film roll with abnormal target detection data can be scrapped. Based on the setting of the marking code, the binding of the target detection data and the target marking code, and the scrapping of the film roll with abnormal target detection data during the winding process, automatic electrode film roll defect detection and automatic electrode film roll scrapping can be achieved. There is no need for manual labeling of abnormal film rolls, which reduces the possibility of bad products not being scrapped accurately and effectively due to inaccurate manual operations and easy falling off of labels, thereby improving the accuracy of scrapping, reducing the possibility of bad products flowing out, and improving the yield rate of battery cells formed by the electrodes.

[0006] In some embodiments, the processing method further includes: in the process of performing die-cutting processing on the film roll corresponding to the target marking code, in response to abnormality in the target detection data, skipping processing on the film roll corresponding to the target marking code.

[0007] In the technical solution of the embodiment of the present application, target detection data is obtained based on the target marking code during the die-cutting process of the electrode film roll. The target detection data may specifically refer to the detection data obtained during the stage before the electrode film roll is die-cut, for example, it may be detection data corresponding to the coating process and the cold pressing process respectively. During the die-cutting process, only the film roll with normal detection data may be die-cut, while the film roll with abnormal detection data may be skipped. Based on this method, since the film roll with abnormal detection data will eventually be scrapped, there is no need to perform die-cutting on the ear, which reduces invalid workload and improves processing efficiency. Moreover, in the stage before the die-cutting process, there is no need to judge whether the detection data is abnormal or to perform any processing on the film roll with abnormal detection data. Since the electrode film roll processed in the die-cutting process has been cut to a relatively shorter film roll length than the electrode film roll processed in the stage before the die-cutting process (such as coating process and cold pressing process), the skipping process is performed in the die-cutting process stage and the skipped film roll is scrapped in the subsequent winding process stage. This can reduce the minimum unit amount of scrapped film rolls, thereby reducing waste during scrapping and improving the utilization rate of the electrode film rolls.

[0008] In some embodiments, the target detection data includes first target detection data or second target detection data; the processing method also includes: in the process of die-cutting the film roll corresponding to the target mark code, identifying the target mark code, and obtaining the first target detection data corresponding to the target mark code, the first target detection data including coating data and cold pressing data; in the process of winding the film roll corresponding to the target mark code, identifying the target mark code, and obtaining the second target detection data corresponding to the target mark code, the second target detection data including coating data, cold pressing data and die-cutting data.

[0009] In the technical solution of the embodiment of the present application, target detection data is obtained based on the target marking code during the die-cutting process of the electrode film roll. The target detection data may specifically refer to the detection data obtained during the stage before the electrode film roll is die-cut, for example, it may be detection data corresponding to the coating process and the cold pressing process respectively. During the die-cutting process, only the film roll with normal detection data may be die-cut, while the film roll with abnormal detection data may be skipped. Based on this method, since the film roll with abnormal detection data will eventually be scrapped, there is no need to perform die-cutting on the ear, which reduces invalid workload and improves processing efficiency. Moreover, in the stage before the die-cutting process, there is no need to judge whether the detection data is abnormal or to perform any processing on the film roll with abnormal detection data. Since the electrode film roll processed in the die-cutting process has been cut to a relatively shorter film roll length than the electrode film roll processed in the stage before the die-cutting process (such as coating process and cold pressing process), the skipping process is performed in the die-cutting process stage and the skipped film roll is scrapped in the subsequent winding process stage. This can reduce the minimum unit amount of scrapped film rolls, thereby reducing waste during scrapping and improving the utilization rate of the electrode film rolls.

[0010] In addition, during the winding process, the detection data corresponding to the coating process, cold pressing process and die-cutting process are combined to comprehensively determine whether the film roll to be wound has abnormal detection data. If so, regardless of whether the target film roll with abnormal detection data has been skipped, it will be scrapped, thereby further improving the accuracy of scrapping, reducing the possibility of defective products flowing out, and improving the yield rate of the battery cell formed by the electrode.

[0011] In some embodiments, during the die-cutting process of the film roll corresponding to the target marking code, in response to an abnormality in the target detection data, the film roll corresponding to the target marking code is skipped, including: during the die-cutting process of the film roll corresponding to the target marking code, in response to an abnormality in at least one detection data in the first target detection data, the film roll corresponding to the target marking code is skipped.

[0012] In the technical solution of the embodiment of the present application, by skipping the processing only in the die-cutting process stage and scrapping the skipped film roll in the subsequent winding process stage, the minimum unit quantity of the scrapped film roll can be reduced, thereby reducing the waste during scrapping and improving the utilization rate of the electrode film roll.

[0013] In some embodiments, during the winding process of the film roll corresponding to the target marking code, in response to an abnormality in the target detection data, the film roll corresponding to the target marking code is scrapped, including: during the winding process of the film roll corresponding to the target marking code, in response to an abnormality in at least one detection data in the second target detection data, the film roll corresponding to the target marking code is scrapped.

[0014] In the technical solution of the embodiment of the present application, by combining the detection data corresponding to the coating process, cold pressing process and die-cutting process respectively during the winding process stage, it is comprehensively determined whether there is any abnormal detection data of the film roll to be wound. If so, regardless of whether the film roll with abnormal target detection data has been skipped, it will be scrapped, thereby further improving the accuracy of scrapping, reducing the possibility of defective products flowing out, and improving the yield rate of the battery cell formed by the electrode.

[0015] In some embodiments, multiple marking codes are set in sequence and at intervals on the electrode film roll, including: multiple marking codes are set in sequence and at intervals on the electrode film roll that has been coated; the target marking code and the target detection data corresponding to the target marking code are bound, including: the target detection data obtained from the coating process and the processing of the electrode film roll after the coating process are bound to the target marking code.

[0016] In the technical solution of the embodiment of the present application, multiple marking codes are set on the electrode film roll at intervals in sequence during the preparation process of the electrode, and after the target detection data of the film roll corresponding to the target marking code in the electrode film roll is obtained, the target marking code is bound to the target detection data. Subsequently, when the electrode is wound, the film roll with abnormal target detection data can be scrapped. Based on the setting of the marking code, the binding of the target detection data and the target marking code, and the scrapping of the film roll with abnormal target detection data during the winding process, automatic electrode film roll defect detection and automatic electrode film roll scrapping can be achieved. There is no need for manual labeling of abnormal film rolls, which reduces the possibility of bad products not being scrapped accurately and effectively due to inaccurate manual operations and easy falling off of labels, thereby improving the accuracy of scrapping, reducing the possibility of bad products flowing out, and improving the yield rate of battery cells formed by the electrodes.

[0017] In some embodiments, the target detection data includes at least one of coating data, cold pressing data and die-cutting data; the target detection data obtained from the coating process and the processing of the electrode film roll after the coating process are respectively bound to the target marking code, including: after the film roll corresponding to the target marking code is coated and the target marking code is set, the target marking code is bound to the coating data; and / or, after the film roll corresponding to the target marking code is cold pressed, the target marking code is bound to the detection data corresponding to the cold pressing process; and / or, after the film roll corresponding to the target marking code is die-cut, the target marking code is bound to the detection data corresponding to the die-cutting process.

[0018] In the technical solution of the embodiment of the present application, multiple marking codes are set on the electrode film roll at intervals in sequence during the preparation process of the electrode, and after the target detection data of the film roll corresponding to the target marking code in the electrode film roll is obtained, the target marking code is bound to the target detection data. Subsequently, when the electrode is wound, the film roll with abnormal target detection data can be scrapped. Based on the setting of the marking code, the binding of the target detection data and the target marking code, and the scrapping of the film roll with abnormal target detection data during the winding process, automatic electrode film roll defect detection and automatic electrode film roll scrapping can be achieved. There is no need for manual labeling of abnormal film rolls, which reduces the possibility of bad products not being scrapped accurately and effectively due to inaccurate manual operations and easy falling off of labels, thereby improving the accuracy of scrapping, reducing the possibility of bad products flowing out, and improving the yield rate of battery cells formed by the electrodes.

[0019] In some embodiments, the coating data includes at least one of the coating position, coating weight, coating speed, drying temperature, drying wind frequency and coating viscosity; and / or, the cold pressing data includes at least one of the cold pressing thickness, cold pressing pressure, cold pressing speed and pole piece tension; and / or, the detection data corresponding to the die-cutting process includes at least one of the die-cutting width, die-cutting pole piece image, die-cutting power, die-cutting frequency and die-cutting pulse width.

[0020] In the technical solution of the embodiment of the present application, multiple marking codes are set on the electrode film roll at intervals in sequence during the preparation process of the electrode, and after the target detection data of the film roll corresponding to the target marking code in the electrode film roll is obtained, the target marking code is bound to the target detection data. Subsequently, when the electrode is wound, the film roll with abnormal target detection data can be scrapped. Based on the setting of the marking code, the binding of the target detection data and the target marking code, and the scrapping of the film roll with abnormal target detection data during the winding process, automatic electrode film roll defect detection and automatic electrode film roll scrapping can be achieved. There is no need for manual labeling of abnormal film rolls, which reduces the possibility of bad products not being scrapped accurately and effectively due to inaccurate manual operations and easy falling off of labels, thereby improving the accuracy of scrapping, reducing the possibility of bad products flowing out, and improving the yield rate of battery cells formed by the electrodes.

[0021] In some embodiments, the marking code is located in the insulating layer area or the tab area of ​​the pole piece film roll.

[0022] In the technical solution of the embodiment of the present application, by setting the marking code in the insulating layer area and the tab area of ​​the electrode film roll, compared with setting the marking code in the coating area, the existence time of the marking code can be effectively increased, and the possibility of the marking code being covered or dissolved by the coating material or damaged or disappearing due to other reasons is reduced, thereby further improving the accuracy of scrapping, reducing the possibility of defective products flowing out, and improving the yield rate of the battery cell formed by the electrode.

[0023] In some embodiments, multiple marking codes are set in sequence on the pole piece film roll, including: on the pole piece film roll, marking codes are set in sequence at each interval of a preset film roll length; when the marking code is located in the pole tab area of ​​the pole piece film roll, the preset film roll length is less than the preset pole tab length.

[0024] In the technical solution of the embodiment of the present application, by making the preset film roll length smaller than the preset tab length, the marking code can be effectively retained on the cut tab after the tab is cut out through die-cutting in the tab area, so as to ensure the judgment of the target detection data during the subsequent winding process and the normal operation of the corresponding scrapping process, further improve the accuracy of scrapping, reduce the possibility of defective products flowing out, and improve the yield rate of the battery cell formed by the electrode.

[0025] In some embodiments, the processing method also includes: after winding the film roll corresponding to the target marking code to form a battery cell, in response to the detection data corresponding to the winding process being normal, binding the target marking code and the detection data corresponding to the winding process; setting a battery cell information code on the battery cell, and binding all target detection data to the battery cell information code respectively.

[0026] In the technical solution of the embodiment of the present application, the corresponding detection data is also acquired during the winding processing stage, and when the winding data is judged to be normal, it is also bound to the target marking code. After the battery cell is formed, the target detection data corresponding to all the target marking codes in the battery cell are bound to the battery cell information code for use in subsequent information tracing, thereby improving the reliability of the battery cell.

[0027] In some embodiments, the processing method further includes: after winding the film roll corresponding to the target marking code to form a battery cell, in response to abnormal detection data corresponding to the winding process, scrapping the battery cell.

[0028] In the technical solution of the embodiment of the present application, by acquiring corresponding detection data during the winding process, and scrapping the battery cells that have defects due to the winding process when it is determined that the winding data is abnormal, the possibility of defective products flowing out can be reduced, and the yield rate of the battery cells formed by the electrodes can be improved.

[0029] In the second aspect, the present application provides an electrode processing device, including: a coding device for setting multiple marking codes at intervals on the electrode film roll; one of the multiple marking codes is used as a target marking code; an electrode preparation device, for: binding the target marking code and the target detection data corresponding to the target marking code; wherein the target detection data is the detection data of the film roll corresponding to the target marking code in the electrode film roll; in the process of winding the film roll corresponding to the target marking code, in response to the abnormality of the target detection data, the film roll corresponding to the target marking code is scrapped.

[0030] It can be understood that the beneficial effects of the second aspect mentioned above can be found in the relevant description of the first aspect mentioned above, and will not be repeated here.

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

[0032] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0033] Figure 1 This is a flow chart of the first embodiment of the electrode processing method provided in this application.

[0034] Figure 2 This is a flow chart of the second embodiment of the electrode processing method provided in this application.

[0035] Figure 3 This is a schematic structural diagram of the first embodiment of the electrode film roll provided in this application.

[0036] Figure 4 This is a schematic structural diagram of the second embodiment of the electrode film roll provided in this application.

[0037] Figure 5 This is a schematic structural diagram of the third embodiment of the electrode film roll provided in this application.

[0038] Figure 6 It is a structural schematic diagram of the fourth embodiment of the electrode film roll provided in this application.

[0039] Figure 7 This is a structural schematic diagram of an embodiment of the electrode processing equipment provided in this application. DETAILED DESCRIPTION

[0040] The following will be combined with the accompanying drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of them. Based on the embodiments of this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

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

[0042] In the description of the embodiments of this application, the technical terms "first," "second," etc. are used only to distinguish different objects and should not be understood to indicate or imply relative importance or to implicitly indicate the quantity, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, the meaning of "plurality" is more than two, unless otherwise specifically defined.

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

[0044] In the description of the embodiments of this application, the term "and / or" is simply a description of the association relationship between associated objects, indicating that three relationships can exist. For example, A and / or B can represent the following three situations: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this document generally indicates that the associated objects are in an "or" relationship.

[0045] 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).

[0046] In the description of the embodiments of the present application, unless otherwise expressly specified or limited, technical terms such as "installed," "connected," "connected," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components or interactions between two components. Those skilled in the art can understand the specific meanings of the above terms in the embodiments of the present application based on specific circumstances.

[0047] With the development of the times, lithium batteries are widely used in energy systems such as hydropower, thermal power, wind power, and solar power, as well as in electric vehicles and other electric devices. In practice, when manufacturing lithium batteries, electrode sheets of appropriate specifications are prepared according to the requirements. The electrode sheets are then wound to form a battery cell, resulting in the corresponding lithium battery. When preparing a lithium battery cell, the electrode sheet film roll is typically subjected to coating, cold pressing, die-cutting, and winding in sequence. The coating process involves coating the electrode sheet film roll with the corresponding electrode active material. When preparing electrode sheets of different polarities, different electrode active materials are applied separately. The cold pressing process involves compacting the electrode coating formed by the coating process using a high-pressure roller press to improve electrode density and mechanical stability. The die-cutting process involves slitting the electrode sheet film roll into electrode sheets of specific lengths and punching out the tabs in the tab area of ​​the electrode sheet (if the electrode sheet is a full-tab lithium battery, the tabs do not need to be punched out) to form the cathode or anode electrode sheets. The winding process may be to wind the cathode electrode sheet, the separator roll and the anode electrode sheet to form a battery cell.

[0048] During each of the above processes, abnormalities may occur on the corresponding electrode film rolls due to incorrect corresponding parameters during processing, errors in mechanical equipment, environmental reasons or other reasons. If lithium battery cells are prepared based on the abnormal electrode film rolls, it is easy to lead to a high defective rate of the final battery cells, which in turn may easily lead to various safety accidents.

[0049] In the existing electrode processing method, when an abnormality is detected in the electrode (for example, when an abnormality is detected in the weight, thickness or microstructure of the electrode film roll), the entire electrode film roll is scrapped first. This method is extremely wasteful, and other normal parts of the electrode film roll will be wasted, so this scrapping method is rarely used. Second, the machine can be shut down manually, and a yellow label can be affixed to the abnormal place on the electrode film roll when the machine is shut down to mark it. The film roll with the yellow label can be scrapped later. There are two problems with this method. First, the electrode film roll lacks a precise positioning system during high-speed operation. After the machine is shut down manually, the operator can only estimate the position of the abnormality on the electrode film roll through the equipment counter or visual inspection. In practice, the yellow label often deviates from the abnormal position by 5 to 10 meters, so that the abnormal film roll is not completely scrapped, which easily leads to the outflow of bad products; second, the yellow label set on the electrode film roll can usually refer to yellow tape. During the subsequent operation of the electrode film roll, the yellow tape is prone to displacement relative to the film roll or direct falling off due to mechanical stress, which also easily leads to the abnormal film roll not being completely scrapped, which easily leads to the outflow of bad products.

[0050] In summary, the existing electrode processing method has a low scrap accuracy, resulting in a high possibility of defective products flowing out, and reducing the yield rate of the battery cell formed by the electrode.

[0051] Based on the above considerations, the present application provides a method for processing a pole piece and a pole piece processing device. The pole piece processing method includes: setting a plurality of marking codes on the pole piece film roll in sequence; one of the plurality of marking codes is used as a target marking code; binding the target marking code and the target detection data corresponding to the target marking code; the target detection data is the detection data of the pole piece film roll corresponding to the target marking code; in the process of winding the film roll corresponding to the target marking code, in response to an abnormality in the target detection data, the film roll corresponding to the target marking code is scrapped. The accuracy of scrapping can be improved to reduce the possibility of defective products flowing out, thereby improving the yield rate of the battery cell formed by the pole piece.

[0052] According to some embodiments of this application, please refer to Figure 1 , Figure 1This is a flow chart of the first embodiment of the electrode processing method provided in this application. The electrode processing method is applied to electrode processing equipment, which may include but is not limited to a coding mechanism, a coating mechanism, a cold pressing mechanism, a die-cutting mechanism, a winding mechanism, and a processor; the electrode processing method includes the following steps.

[0053] S101: a plurality of marking codes are sequentially and spaced apart on the electrode film roll.

[0054] The electrode film roll specifically refers to the film roll material to be coated, cold pressed and die-cut to form the electrode. The length of the electrode film roll can be several thousand meters, and the length of the electrode can be 4-30 meters. For example, the length of the electrode can be 10 meters.

[0055] The marking code may specifically be a code that can be scanned to obtain corresponding information, including but not limited to a barcode and a QR code.

[0056] After the electrode film roll is coated and the electrode active material coated on the electrode film roll is dried, a plurality of marking codes can be sequentially and spaced apart on the electrode film roll by a coding mechanism, so that the plurality of marking codes are respectively set on different sections of the electrode film roll. Subsequently, by identifying the marking code, the test data of the film roll at the location where the marking code is located can be bound to the marking code, or the test data of the film roll at the location where the marking code is located can be obtained.

[0057] S102: Binding the target marking code and the target detection data corresponding to the target marking code.

[0058] Among them, the target detection data is the detection data of the film roll corresponding to the target marking code in the electrode film roll.

[0059] Taking one of the multiple marking codes as the target marking code as an example, during the coating process, when setting the target marking code, the encoder can be used to determine the distance between the location of the target marking code and the detection mechanism, so as to determine the target detection data of the roll film at the location of the target marking code based on the moving speed of the electrode film roll, the current time and the acquisition time of each detection data obtained by the detection mechanism, and then bind the target detection data of the roll film at the location of the target marking code to the target marking code, that is, bind the detection data of the coating process of the roll film at the location of the target marking code to the target marking code.

[0060] During the cold pressing process, when the target mark code is identified, the target detection data of the roll film at the location of the target mark code can be bound to the target mark code, that is, the detection data of the cold pressing process of the roll film at the location of the target mark code can be bound to the target mark code.

[0061] And in the die-cutting process, when the target mark code is identified, the target detection data of the roll film where the target mark code is located can be bound to the target mark code, that is, the detection data of the die-cutting process of the roll film where the target mark code is located can be bound to the target mark code.

[0062] After each processing, the target detection data obtained during the corresponding processing can be bound to the target marker code, so that when the target marker code is identified in any subsequent processing, all the target detection data obtained in the processing before any processing can be obtained, which is convenient for corresponding abnormality analysis.

[0063] In practice, the target marking code may be scanned by a barcode reader to obtain a corresponding target identification code. For example, in the process of relative movement of the electrode film roll relative to the barcode reader, each marking code may be scanned in turn, that is, each marking code may be used as a target marking code for corresponding scanning, so as to obtain each marking code in turn and subsequently perform corresponding detection data binding and other processing.

[0064] S103: In the process of winding the film roll corresponding to the target mark code, in response to the target detection data being abnormal, the film roll corresponding to the target mark code is scrapped.

[0065] When the film roll corresponding to the target mark code is wound, first, if the target detection data has been judged to be abnormal in the processing before the winding process, the film roll corresponding to the target mark code can be directly scrapped. Second, if the target detection data has not been judged to be abnormal in the processing before the winding process, but the target detection data is judged to be abnormal in the winding process, the film roll corresponding to the target mark code can also be scrapped.

[0066] The present application sets multiple marking codes on the electrode film roll at intervals in the electrode preparation process, and binds the target marking code to the target detection data after obtaining the target detection data of the film roll corresponding to the target marking code in the electrode film roll. Subsequently, when the electrode is wound, the film roll with abnormal target detection data can be scrapped. Based on the setting of the marking code, the binding of the target detection data and the target marking code, and the scrapping of the film roll with abnormal target detection data during the winding process, automatic electrode film roll defect detection and automatic electrode film roll scrapping can be achieved. There is no need for manual labeling of abnormal film rolls, which reduces the possibility of bad products not being scrapped accurately and effectively due to inaccurate manual operations and easy detachment of labels, thereby improving the accuracy of scrapping, reducing the possibility of bad products flowing out, and improving the yield rate of battery cells formed by the electrodes.

[0067] According to some embodiments of this application, please refer to Figure 2 , Figure 2 This is a flow chart of a second embodiment of the electrode processing method provided in this application. The electrode processing method of this embodiment includes the following steps:

[0068] S201: a plurality of marking codes are sequentially and spaced apart on the electrode film roll.

[0069] Step S201 corresponds to step S101 and will not be described again here.

[0070] S202: Binding the target marking code and the target detection data corresponding to the target marking code, wherein the target detection data is the detection data of the film roll corresponding to the target marking code in the electrode film roll.

[0071] Step S202 corresponds to step S102 and will not be described again here.

[0072] S203: In the process of performing die-cutting processing on the film roll corresponding to the target mark code, in response to the target detection data being abnormal, skipping processing on the film roll corresponding to the target mark code.

[0073] During the die-cutting process, the target detection data may include coating data and cold pressing data. If it is determined that at least one piece of information in the coating data and the cold pressing data is abnormal, the step of skipping the film roll corresponding to the target marking code can be executed during the die-cutting process, that is, resetting and re-cutting are performed, skipping the film roll with the abnormality, and not punching the pole ear of the film roll with the abnormality. Instead, the pole piece and its pole ear are punched starting from the film roll with normal subsequent detection data.

[0074] It should be noted here that, generally speaking, the electrode film roll will be cut for the first time during the cold pressing process, and the electrode film roll will be cut for the second time during the die-cutting process to obtain the electrode. The length of the single electrode film roll after the first cut is less than the length of the single electrode film roll before the first cut, but greater than the length of the single electrode finally formed. If, during the die-cutting process, it is recognized that the target detection data is normal, but the length of the film roll where the target mark code is located is less than the length of a single electrode, the film roll corresponding to the target mark code is also skipped. For example, the length of the electrode film roll after the first cut is 20 meters. If it is determined that the film roll of 0-5 meters is abnormal and needs to be skipped, the film roll of 5.1-15.1 meters can be punched to form the electrode ear to form the electrode. The remaining 4.9 meters is less than the length of a single electrode (assuming it is 10 meters), so the remaining 4.9 meters of film roll also needs to be skipped.

[0075] S204: in the process of winding the film roll corresponding to the target marking code, the film roll that has been skipped is scrapped.

[0076] In some embodiments, the target detection data includes first target detection data or second target detection data. The processing method may further include:

[0077] During the die-cutting process of the film roll corresponding to the target marking code, the target marking code is identified and first target detection data corresponding to the target marking code is acquired. The first target detection data includes coating data and cold pressing data.

[0078] During the winding process of the film roll corresponding to the target mark code, the target mark code is identified and second target detection data corresponding to the target mark code is obtained. The second target detection data includes coating data, cold pressing data and die-cutting data.

[0079] Among them, coating data may refer to the detection data corresponding to the coating process collected during the coating process, cold pressing data may refer to the detection data corresponding to the cold pressing process collected during the cold pressing process, and die-cutting data may refer to the detection data corresponding to the die-cutting process collected during the die-cutting process.

[0080] Optionally, step S203 may specifically include: during the die-cutting process of the film roll corresponding to the target mark code, in response to at least one detection data in the first target detection data being abnormal, skipping the film roll corresponding to the target mark code.

[0081] Optionally, step S204 may specifically include: in the process of winding the film roll corresponding to the target mark code, scrapping the film roll that has been skipped, and in response to at least one detection data in the second target detection data being abnormal, scrapping the film roll corresponding to the target mark code.

[0082] Specifically, during the winding process, when a film roll that has skipped the die-cutting process is identified by the target marking code or the presence of the tab, the film roll that has skipped the process can be cut off from the normal film roll and scrapped accordingly.

[0083] In addition, during the winding process, since the target detection data has been updated and the die-cutting data has been added, that is, in the die-cutting process stage, the target detection data is the above-mentioned first target detection data, and in the winding process stage, the target detection data is the above-mentioned second detection data, so in the winding process stage, the target mark code can continue to be identified to obtain the target detection data, and when it is judged that the target detection data is abnormal, even if the die-cutting process does not skip the film roll corresponding to the target mark code, the film roll corresponding to the target mark code must be scrapped.

[0084] The present application obtains target detection data based on the target marking code during the die-cutting process of the electrode film roll. The target detection data may specifically refer to the detection data obtained before the electrode film roll is die-cut, for example, it may be detection data corresponding to the coating process and the cold pressing process respectively. During the die-cutting process, only the film roll with normal detection data may be die-cut, while the film roll with abnormal detection data may be skipped. Based on this method, since the film roll with abnormal detection data will eventually be scrapped, there is no need to die-cut the electrode ear, which reduces invalid workload and improves processing efficiency. In addition, In the stage before the die-cutting process, there is no need to judge whether the detection data is abnormal or to perform any processing on the film roll with abnormal detection data. Since the electrode film roll processed in the die-cutting process has been cut to a relatively shorter film roll length than the electrode film roll processed in the stage before the die-cutting process (such as coating process and cold pressing process), skipping the process in the die-cutting process and scrapping the skipped film roll in the subsequent winding process can reduce the minimum unit amount of scrapped film rolls, thereby reducing waste during scrapping and improving the utilization rate of the electrode film rolls.

[0085] In addition, during the winding process, the detection data corresponding to the coating process, cold pressing process and die-cutting process are combined to comprehensively determine whether the film roll to be wound has abnormal detection data. If so, regardless of whether the target film roll with abnormal detection data has been skipped, it will be scrapped, thereby further improving the accuracy of scrapping, reducing the possibility of defective products flowing out, and improving the yield rate of the battery cell formed by the electrode.

[0086] According to some embodiments of the present application, step S101 of this embodiment includes the following steps:

[0087] On the coated electrode film roll, a plurality of marking codes are sequentially arranged at intervals.

[0088] Step S102 of this embodiment includes the following steps:

[0089] The target detection data obtained from the coating process and the processing of the electrode film roll after the coating process are bound to the target marking code.

[0090] Specifically, the processing of the electrode film roll after the coating process may include cold pressing and / or die cutting. In other examples, it may also include other processing of the electrode film roll. The specific processing may be determined according to actual needs and is not limited here.

[0091] In addition, the binding of detection data and target marker codes can be understood as informationally associating the detection data with the data corresponding to the target marker code, and establishing a mapping relationship between the detection data and the target marker code, so that all detection data that have been bound to the target marker code can be obtained by searching for the data corresponding to the target marker code.

[0092] The target detection data may include at least one of coating data, cold pressing data, and die-cutting data.

[0093] In this embodiment, binding the target detection data obtained from the coating process and the processing of the electrode film roll after the coating process with the target marking code may include the following steps:

[0094] After coating the film roll corresponding to the target mark code and setting the target mark code, the target mark code and coating data are bound. And / or,

[0095] After the film roll corresponding to the target mark code is cold pressed, the target mark code and the cold pressing data are bound together. And / or,

[0096] After die-cutting the film roll corresponding to the target marking code, the target marking code and the die-cutting data are bound.

[0097] Multiple marking codes can be set in sequence and at intervals on the electrode film roll that has been coated and dried to reduce the possibility of the marking code being damaged or corroded due to the coating process or the electrode active material, further improve the stability of the marking code, and thus improve the accuracy of subsequent scrapping.

[0098] After each processing is completed, the electrode film roll that has undergone the corresponding processing is inspected, and the detection data obtained is bound to the target mark code to continuously enrich the target detection data bound to the target mark code, so that the target detection data will increase the detection data corresponding to the processing after each processing.

[0099] In some embodiments, the coating data includes at least one of coating position, coating weight, coating speed, drying temperature, drying wind frequency and coating viscosity; and / or,

[0100] The cold pressing data includes at least one of cold pressing thickness, cold pressing pressure, cold pressing speed and pole piece tension; and / or,

[0101] The detection data corresponding to the die-cutting process includes at least one of a die-cutting width, a die-cutting pole piece image, a die-cutting power, a die-cutting frequency, and a die-cutting pulse width.

[0102] Specifically, the coating position can be the relative position between the electrode active material coated on the electrode film roll and the electrode film roll. For example, in the detection and judgment of the coating position, first, it is necessary to judge whether the distance between the edge of the electrode active material and the edge of the electrode film roll meets the preset edge spacing condition. The preset edge spacing can be 5 mm or 7 mm or 10 mm or other spacing; second, if it is necessary to coat the electrode active material on both sides of the electrode film roll, it is necessary to make the coverage areas of the electrode active materials coated on both sides of the electrode film roll correspond to each other, that is, it is necessary to judge whether the coating width and coating position of the electrode active materials coated on both sides of the electrode film roll are the same.

[0103] The coating weight may be the weight of the electrode active material on the electrode film roll. Since the coating thickness is usually constant, the coating weight may usually be determined based on the coating width or coating area of ​​the electrode active material.

[0104] The coating speed may be the relative movement speed between the coating mechanism for coating the electrode active material and the electrode film roll.

[0105] The drying temperature may be the temperature used to dry the electrode active material after coating it.

[0106] The drying wind frequency may be the wind frequency used to dry the electrode active material after coating it.

[0107] The coating viscosity can be the viscosity of the electrode active material.

[0108] The cold pressing thickness may be the thickness of the electrode film roll after the cold pressing treatment.

[0109] The cold pressing pressure may be the pressure used during the cold pressing process.

[0110] The cold pressing speed may be the cold pressing speed during the cold pressing treatment.

[0111] The electrode tension may be the tension of the electrode film roll after cold pressing.

[0112] The die-cutting width may be the width of the pole piece obtained after the die-cutting process.

[0113] The die-cut electrode pattern may be an appearance image corresponding to the electrode obtained after the die-cutting process, for example, an image acquired by a CCD (Charge Coupled Device) image sensor, ie, a CCD image.

[0114] The die-cutting power, die-cutting frequency and die-cutting pulse width can be parameters for controlling the die-cutting mechanism to perform die-cutting.

[0115] When judging the target detection data, if there is an abnormality in any of the above-mentioned information in the target detection data obtained in response to identifying the target mark code, that is, when the corresponding preset conditions are not met, it can be determined that the film roll corresponding to the target mark code is a defective product, and needs to be skipped in the die-cutting stage and / or scrapped in the winding stage.

[0116] The present application sets multiple marking codes on the electrode film roll at intervals in the electrode preparation process, and binds the target marking code to the target detection data after obtaining the target detection data of the film roll corresponding to the target marking code in the electrode film roll. Subsequently, when the electrode is wound, the film roll with abnormal target detection data can be scrapped. Based on the setting of the marking code, the binding of the target detection data and the target marking code, and the scrapping of the film roll with abnormal target detection data during the winding process, automatic electrode film roll defect detection and automatic electrode film roll scrapping can be achieved. There is no need for manual labeling of abnormal film rolls, which reduces the possibility of bad products not being scrapped accurately and effectively due to inaccurate manual operations and easy detachment of labels, thereby improving the accuracy of scrapping, reducing the possibility of bad products flowing out, and improving the yield rate of battery cells formed by the electrodes.

[0117] According to some embodiments of the present application, the marking code is located in the insulating layer area or the tab area of ​​the pole piece film roll.

[0118] Please see Figures 3 to 6 , Figure 3 This is a schematic structural diagram of the first embodiment of the electrode film roll provided in this application. Figure 4 This is a structural diagram of the second embodiment of the electrode film roll provided by this application. Figure 5 This is a schematic structural diagram of the third embodiment of the electrode film roll provided in this application. Figure 6 It is a structural schematic diagram of the fourth embodiment of the electrode film roll provided in this application.

[0119] like Figures 3 to 5 As shown, the tab area 1 may refer to the area in the pole piece film roll where the tab is located. The tab area 1 of the pole piece film roll is usually reserved for punching to form the tab during the subsequent die-cutting process. The insulating layer area 2 may refer to the area in the pole piece film roll where the insulating layer is located. The insulating layer area 2 may play a role in avoiding short circuits, that is, reducing the possibility of short circuits caused by direct contact between the anode pole piece and the negative pole piece. The coating area 3 may refer to the area in the pole piece film roll where coating is performed. The coating area 3 is the area where the pole piece active material is coated. The marking code 4 may be a QR code, a barcode, or other types of codes.

[0120] like Figure 6As shown in the figure, the specific distribution of the coating area and the insulating layer area is shown in the figure. During the die-cutting process, pre-cutting can be performed on the tab area between the two insulating layer areas, and then die-cutting can be performed on the insulating area and the tab area between the two insulating layer areas to cut the tab. It should be noted that Figure 6 The electrode film roll shown is a electrode film roll to be prepared into a half-tab battery. When the electrode film roll needs to be prepared into any other type of battery electrode, the electrode film roll can be die-cut with other shapes of die-cut dividing lines, or the electrode tabs may not be cut (such as the electrode of a full-tab battery that does not require electrode tab cutting). The specific shape can be determined according to specific needs and is not limited here.

[0121] For example, suppose Figure 6 The electrode film roll shown is a electrode film roll for a cathode electrode. By providing an insulating layer area based on ceramic or other material particles between the coating area with active material and the area of ​​the electrode ear to be cut, the burrs caused by die-cutting can be reduced, thereby improving the smoothness and reliability of the electrode ear generated by die-cutting.

[0122] It should be noted that when processing the pole film rolls of different battery shapes, the battery with the insulating layer coating area is usually die-cut for the pole ears, for example:

[0123] Square shell batteries usually undergo die-cutting of the tabs, and some cylindrical batteries also undergo die-cutting of the tabs.

[0124] For full-tab batteries, there is no need to cut the tabs in the tab area. The complete tab area is retained as the tab, and the corresponding part of the tab area is flattened or smoothed after the electrode film roll is wound to achieve the preparation of full-tab batteries.

[0125] The length of the marking code along the extension direction of the electrode film roll can be 2 mm, 5 mm or other lengths.

[0126] First, the insulating layer area is an area that will not be punched during die-cutting or any other processing, so the marking code can be set in the insulating layer area so that the marking code can be stably retained on the electrode film roll for a long time until the winding process stage.

[0127] Second, since the tabs are punched out in the tab area, a marking code can be set on the area corresponding to the tab in the tab area so that the marking code can be stably retained on the pole film roll for a long time until the winding process. It should be noted here that if the pole sheet to be prepared from the pole film roll is the pole sheet of a full-tab lithium battery cell, the tab area is usually retained in its entirety without punching. In this case, the marking code in the tab area has the best stability.

[0128] Third, after the coating process is completed and the electrode module is dried, multiple marking codes can be set in the coating area so that the marking codes can be stably retained on the electrode film roll for a long time until the winding process stage.

[0129] By setting the marking code in the insulating layer area and the tab area of ​​the electrode film roll, the present application can effectively increase the existence time of the marking code compared to setting the marking code in the coating area, reduce the possibility of the marking code being covered or dissolved by the coating material or damaged or disappearing due to other reasons, further improve the accuracy of scrapping, reduce the possibility of defective products flowing out, and improve the yield rate of the battery cell formed by the electrode.

[0130] According to some embodiments of the present application, a plurality of marking codes are sequentially and spaced apart on the electrode film roll, including:

[0131] On the electrode film roll, marking codes are set in sequence at intervals of a preset film roll length.

[0132] When the marking code is located in the tab area of ​​the electrode film roll, the preset film roll length is less than the preset tab length.

[0133] like Figure 3 As shown, the tab length may refer to the length of the tab punched out in the tab area by die-cutting in the extension direction Dx of the pole piece film roll.

[0134] like Figure 3 As shown, on the electrode film roll, marking codes are sequentially set at intervals of a preset film roll length S along the extension direction Dx of the electrode film roll.

[0135] The preset film roll length is a length set according to the actual marking code distribution density requirements, and is used to characterize the spacing distance between adjacent marking codes in the extension direction Dx of the electrode film roll. By reasonably setting the preset film roll length, the distribution density of the marking code in the extension direction Dx of the electrode film roll can reach a reasonable level.

[0136] Since the preset film roll length is smaller than the preset tab length, the marking code set at intervals according to the preset film roll length can still leave part of the marking code on the punched tab even after the tab is punched out after die-cutting, so as to be used for subsequent binding and acquisition of target detection data through code reader recognition.

[0137] By making the preset film roll length shorter than the preset tab length, the present application can effectively retain the marking code on the cut tab after the tab is cut out through die-cutting in the tab area, thereby ensuring the judgment of target detection data during subsequent winding processing and the normal operation of corresponding scrapping processing, further improving the accuracy of scrapping, reducing the possibility of defective products flowing out, and improving the yield rate of the battery cell formed by the electrode.

[0138] According to some embodiments of the present application, the processing method further includes:

[0139] After the film roll corresponding to the target marking code is wound to form a battery cell, in response to the winding data being normal, the target marking code and the winding data are bound.

[0140] A cell information code is set on the cell, and all target detection data are bound to the cell information code.

[0141] The cell information code may be a code set on the surface of the cell after the cell is formed, and may be a QR code, a barcode, or other types of codes.

[0142] The present application obtains corresponding detection data during the winding processing stage, and when the winding data is judged to be normal, it is also bound to the target marking code. After the battery cell is formed, the target detection data corresponding to all the target marking codes in the battery cell are bound to the battery cell information code for use in subsequent information tracing, thereby improving the reliability of the battery cell.

[0143] According to some embodiments of the present application, the processing method further includes:

[0144] After the film roll corresponding to the target marking code is wound to form a battery cell, the battery cell is scrapped in response to abnormal winding data.

[0145] The present application obtains corresponding detection data during the winding process, and when it is determined that the winding data is abnormal, the battery cells with defects caused by the winding process are scrapped, thereby reducing the possibility of defective products flowing out and improving the yield rate of the battery cells formed by the electrodes.

[0146] This application provides a pole piece processing device, such as Figure 7 As shown, Figure 7 This is a schematic structural diagram of an embodiment of the electrode processing equipment provided in this application. The electrode processing equipment 5 includes: a coding device 51 and an electrode preparation device 52.

[0147] The coding device 51 may specifically include but is not limited to the coding mechanism described in the above embodiments.

[0148] The electrode preparation device 52 may specifically include, but is not limited to, the coating mechanism, cold pressing mechanism, die-cutting mechanism, winding mechanism, and processor described in the above embodiments.

[0149] The coding device 51 is used to sequentially and spaced apart set a plurality of marking codes on the electrode film roll, wherein one of the plurality of marking codes is used as a target marking code.

[0150] The pole piece preparation device 52 is used for:

[0151] The target marking code and the target detection data corresponding to the target marking code are bound together, wherein the target detection data is the detection data of the film roll corresponding to the target marking code in the electrode film roll.

[0152] In the process of winding the film roll corresponding to the target mark code, in response to the target detection data being abnormal, the film roll corresponding to the target mark code is scrapped.

[0153] The coding device 51 or the electrode preparation device 52 can also perform the steps described in any of the above embodiments, which will not be repeated here.

[0154] The present application sets multiple marking codes on the electrode film roll at intervals in the electrode preparation process, and binds the target marking code to the target detection data after obtaining the target detection data of the film roll corresponding to the target marking code in the electrode film roll. Subsequently, when the electrode is wound, the film roll with abnormal target detection data can be scrapped. Based on the setting of the marking code, the binding of the target detection data and the target marking code, and the scrapping of the film roll with abnormal target detection data during the winding process, automatic electrode film roll defect detection and automatic electrode film roll scrapping can be achieved. There is no need for manual labeling of abnormal film rolls, which reduces the possibility of bad products not being scrapped accurately and effectively due to inaccurate manual operations and easy detachment of labels, thereby improving the accuracy of scrapping, reducing the possibility of bad products flowing out, and improving the yield rate of battery cells formed by the electrodes.

[0155] The above description of the various embodiments tends to emphasize the differences between the various embodiments. The same or similar aspects can be referenced with each other and will not be repeated herein for the sake of brevity.

[0156] In the several embodiments provided in this application, it should be understood that the disclosed methods and devices can be implemented in other ways. For example, the device implementation methods described above are only schematic. For example, the division of modules or units is only a logical function division. There may be other division methods in actual implementation. For example, units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, and the indirect coupling or communication connection of devices or units can be electrical, mechanical or other forms.

[0157] In addition, the functional units in the various embodiments of the present application may be integrated into a single processing unit, or each unit may exist physically separately, or two or more units may be integrated into a single unit. The aforementioned integrated units may be implemented in the form of hardware or software functional units.

[0158] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application, or the part that contributes to the existing technology, or all or part of the technical solution can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes a number of instructions for enabling a computer device (which can be a personal computer, server, or network device, etc.) or a processor to execute all or part of the steps of the various implementation methods of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk, and other media that can store program code.

[0159] 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 make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions 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 processing a pole piece, characterized in that: Applied to electrode processing equipment, the processing method includes: A plurality of marking codes are sequentially and spaced apart on the electrode film roll; wherein one of the plurality of marking codes is used as a target marking code; Binding the target marking code and the target detection data corresponding to the target marking code; wherein the target detection data is the detection data of the film roll corresponding to the target marking code in the electrode film roll; In the process of die-cutting the film roll corresponding to the target mark code, in response to the target detection data being abnormal, skipping the film roll corresponding to the target mark code; In the process of winding the film roll corresponding to the target mark code, in response to the target detection data being abnormal, the film roll corresponding to the target mark code is scrapped; Wherein, the target detection data includes coating data, cold pressing data and die-cutting data; The multiple marking codes are sequentially and spaced apart on the electrode film roll, including: On the electrode film roll, the marking codes are sequentially arranged at intervals of a preset film roll length; the preset film roll length is used to represent the interval distance between adjacent marking codes in the extension direction of the electrode film roll; The marking code is located in the tab area of ​​the electrode film roll, and the preset film roll length is smaller than the preset tab length.

2. The processing method according to claim 1, characterized in that The target detection data includes first target detection data or second target detection data; The processing method further comprises: In a process of die-cutting a film roll corresponding to the target mark code, identifying the target mark code and acquiring first target detection data corresponding to the target mark code, the first target detection data including the coating data and the cold pressing data; During the winding process of the film roll corresponding to the target mark code, the target mark code is identified and second target detection data corresponding to the target mark code is obtained, wherein the second target detection data includes the coating data, the cold pressing data and the die-cutting data.

3. The processing method according to claim 2, characterized in that In the process of performing die-cutting on the film roll corresponding to the target mark code, in response to the target detection data being abnormal, skipping the film roll corresponding to the target mark code, comprises: During the die-cutting process of the film roll corresponding to the target mark code, in response to at least one detection data in the first target detection data being abnormal, the film roll corresponding to the target mark code is skipped.

4. The processing method according to claim 2, characterized in that The method includes scrapping the film roll corresponding to the target mark code in response to abnormality in the target detection data during the winding process of the film roll corresponding to the target mark code, including: During the process of winding the film roll corresponding to the target mark code, in response to at least one detection data in the second target detection data being abnormal, the film roll corresponding to the target mark code is scrapped.

5. The processing method according to any one of claims 1 to 4, characterized in that: The multiple marking codes are sequentially and spaced apart on the electrode film roll, including: On the electrode film roll that has been coated, a plurality of marking codes are sequentially and spaced apart; Binding the target marker code and the target detection data corresponding to the target marker code includes: The target detection data obtained from the coating process and the processing of the electrode film roll after the coating process are respectively bound to the target marking code.

6. The processing method according to claim 5, characterized in that: The target detection data obtained from the coating process and the processing of the electrode film roll after the coating process are respectively bound to the target marking code, including: After coating the film roll corresponding to the target marking code and setting the target marking code, binding the target marking code to the coating data; and / or, After the film roll corresponding to the target marking code is subjected to a cold pressing process, the target marking code and the detection data corresponding to the cold pressing process are bound together; and / or, After the film roll corresponding to the target marking code is die-cut, the target marking code and the detection data corresponding to the die-cutting process are bound.

7. The processing method according to claim 6, characterized in that The coating data includes at least one of coating position, coating weight, coating speed, drying temperature, drying wind frequency and coating viscosity; and / or, The cold pressing data includes at least one of cold pressing thickness, cold pressing pressure, cold pressing speed and pole piece tension; and / or, The detection data corresponding to the die-cutting process includes at least one of a die-cutting width, a die-cutting pole piece image, a die-cutting power, a die-cutting frequency, and a die-cutting pulse width.

8. The processing method according to any one of claims 1 to 4, characterized in that: The processing method further comprises: After the film roll corresponding to the target marking code is wound to form a battery cell, in response to the detection data corresponding to the winding process being normal, the target marking code is bound to the detection data corresponding to the winding process; A cell information code is set on the cell, and all the target detection data are respectively bound to the cell information code.

9. The processing method according to any one of claims 1 to 4, characterized in that: The processing method further comprises: After a film roll corresponding to the target marking code is wound to form a battery cell, the battery cell is scrapped in response to abnormality in detection data corresponding to the winding process.

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