Labeling method and labeling equipment

Abstract

The embodiment of the present application provides a labeling method and a labeling device, wherein the labeling method includes: in response to a missing label signal for a target cell electrode piece, controlling the electrode piece tape to slow down; wherein the target cell electrode piece is a single cell electrode piece detected to have defects in the electrode piece tape, and the electrode piece tape includes a plurality of undivided single cell electrode pieces; in response to the electrode piece tape stopping conveying, determining the number of cell electrode pieces of the single cell electrode piece passing through the labeling position since the electrode piece tape stopped conveying and the current cell electrode piece corresponding to the labeling position; continuing to convey the electrode piece tape, labeling the next single cell electrode piece of the current cell electrode piece, so that the next single cell electrode piece carries the target number of detection marks to complete the labeling of the target cell electrode piece; the target number is obtained based on the number of cell electrode pieces. In this way, the present application replaces the manual rewinding labeling method with automatic labeling, reduces the damage to the electrode piece during labeling, and improves the accuracy of labeling.

Description

Technical Field

[0001] The embodiments of the present application relate to the field of pole piece detection technology, and relate to but are not limited to a labeling method and a labeling device. Background Art

[0002] Defective product control and testing are widely used and indispensable in industry. For example, in the field of lithium battery production, the pole pieces need to be inspected for defects during the pole piece die-cutting stage to avoid the inability to detect pole piece defects after the pole pieces are wound into battery cells, resulting in defective battery cells entering the market and causing battery quality problems.

[0003] When conducting pole piece inspection, the related technology manually labels the defective pole piece to indicate that the pole piece has defects and needs to be scrapped. However, manual labeling is prone to missing labels. When detecting pole piece missing labels, the related technology slows down and stops the machine, and manually rewinds the material rolled into the reel to add labels. However, manual labeling is not only prone to wrong positions, but also causes wrinkles and decarbonization of the pole piece during rewinding. Therefore, how to add labels to defective pole pieces without damaging the pole piece is an urgent problem to be solved. Summary of the invention

[0004] In order to solve the problems existing in the related technology, the embodiments of the present application provide a re-labeling method and a labeling device. Through automatic re-labeling after missed labeling, each defective battery cell pole piece in the pole piece material strip can be automatically located, replacing the manual rewinding and re-labeling method, reducing damage to the pole pieces and improving the accuracy of re-labeling.

[0005] In a first aspect, the present application provides a supplementary labeling method, which includes: in response to a missing labeling signal for a target battery cell electrode sheet, controlling the electrode sheet tape to decelerate; wherein the target battery cell electrode sheet is a single battery cell electrode sheet detected to have defects in the electrode sheet tape, and the electrode sheet tape includes multiple undivided single battery cell electrode sheets; in response to the electrode sheet tape stopping conveying, determining the number of single battery cell electrode sheets passing through a labeling position since the electrode sheet tape decelerated and the current battery cell electrode sheet corresponding to the labeling position; continuing to convey the electrode sheet tape, and labeling the next single battery cell electrode sheet of the current battery cell electrode sheet, so that the next single battery cell electrode sheet carries a target number of detection marks to complete the supplementary labeling of the target battery cell electrode sheet; the target number is obtained based on the number of battery cell electrode sheets.

[0006] Through the above-mentioned technical means, by detecting the marks on the defective single-cell pole pieces in the moving pole piece material strip, the defective pole pieces that are missing the marks can be automatically re-marked, so that each defective cell pole piece in the pole piece material strip can be located in the subsequent process, replacing the method of manual rewinding and re-marking, reducing the problems of manual omission of re-marking, non-re-marking, and wrong re-marking position, and at the same time reducing the high-risk problems of wrinkling, folding, decarbonization of the pole piece caused by manual rewinding, and reducing the damage to the pole piece; and through automatic re-marking, the outflow of defective products can be reduced and the battery yield can be improved; at the same time, with the full automation productivity and production efficiency of battery manufacturing becoming higher and higher, it can accurately and stably complete the automatic re-marking of defective products after missing the marks, which can improve product quality, improve production efficiency, reduce the outflow of defective products, and ensure the safety of produced batteries, which has very important practical production significance.

[0007] In some embodiments, determining the number of battery cell pole pieces includes: obtaining the number of rotations of the transmission device that transports the pole piece tape and the pole piece length of a single battery cell pole piece from the time the pole piece tape decelerates to the time the pole piece tape stops being transported; based on the number of rotations and the radius of the transmission device, determining the length of the pole piece tape from the time the pole piece tape decelerates to the time the pole piece tape stops being transported; based on the pole piece length and the tape length, determining the number of battery cell pole pieces.

[0008] Through the above-mentioned technical means, the number of rotations of the transmission device on the labeling equipment during the deceleration and shutdown process can be accurately calculated to calculate the number of battery cell pole pieces that the pole piece material strip has passed through from deceleration to complete stop, so that when performing re-labeling, the number of detection marks used to locate defective battery cells can be accurately determined, so that defective pole pieces can be accurately located in subsequent processes.

[0009] In some embodiments, a label is applied to the next single cell pole piece after the current cell pole piece so that the next single cell pole piece carries a target number of detection marks, including: setting a target number of detection marks in sequence within a preset range after the positioning hole of the next single cell pole piece so that the next single cell pole piece carries a target number of detection marks, for scrapping the single cell pole piece carrying the target number of detection marks during the winding or stacking process and the target number of single cell pole pieces after the single cell pole piece.

[0010] Through the above-mentioned technical means, the target number of inspection marks are marked in sequence behind the positioning hole on the next battery cell electrode during supplementary marking, thereby reducing the problem of some inspection marks being covered when multiple inspection marks are marked. This allows the defective battery cell to be accurately located when the defective electrode is scrapped through the inspection mark in the subsequent winding process, and the defective battery cell will not be found incorrectly due to the inspection mark being covered, resulting in the defective electrode being wound into a defective battery cell, thereby improving the yield of the battery cell.

[0011] In some embodiments, the supplementary marking method further includes: detecting the marking spacing between two adjacent detection markings in the next single-cell electrode sheet; in response to the marking spacing not satisfying the joint marking spacing condition, controlling the electrode sheet material strip to stop conveying.

[0012] Through the above-mentioned technical means, a fool-proof logic is provided when automatically supplementing multiple detection marks, and the distance between any two detection marks among the multiple detection marks is detected, so that the spacing between two adjacent detection marks among the multiple detection marks is the same, and other detection marks will not be covered when the number of detection marks is large, resulting in the problem of unrecognition. Therefore, when identifying the number of detection marks in the next process, the number of detection marks on the battery cell electrode can be accurately identified.

[0013] In some embodiments, detecting the marking spacing between two adjacent detection marks in the next single-cell pole piece includes: obtaining a first rotation number of the transmission device passing the detection position for any detection mark in the next single-cell pole piece and a second rotation number of the next detection mark passing the detection position; determining the marking spacing between two adjacent detection marks based on the first rotation number, the second rotation and the radius of the transmission device.

[0014] Through the above-mentioned technical means, the mark spacing between two adjacent detection marks is calculated by the number of rotations of the transmission device between two adjacent detection marks and the circumference of the transmission device, so that the mark spacing can be accurately calculated, and the distance between two adjacent marks among multiple detection marks can be controlled, so that the winding or stacking process can accurately identify multiple marks.

[0015] In some embodiments, the re-marking method also includes: inspecting the next single battery cell pole piece to obtain a detection result; the detection result includes at least the number and defects of the detection marks on the next single battery cell pole piece; based on the detection result, determining whether to re-mark the next single battery cell pole piece.

[0016] Through the above-mentioned technical means, after supplementary marking is performed on the next single battery cell electrode sheet, the mark on the next single battery cell electrode sheet and the electrode sheet can be detected. When the number of detected marks is incorrect or the electrode sheet is also a defective electrode sheet, it is determined whether to supplementary mark the next single battery cell electrode sheet, so that the target battery cell electrode sheet can be located in any case.

[0017] In some embodiments, in response to the detection result not meeting the target condition, the next single cell pole piece is supplementally labeled, including: in response to the number of detection marks on the next single cell pole piece being less than the target number, controlling the pole piece tape to stop conveying; in response to the pole piece tape stopping conveying, determining the number of first cell pole pieces passing through the labeling position since the pole piece tape decelerated and the current first cell pole piece corresponding to the labeling position; continuing to convey the pole piece tape, and labeling the next single cell pole piece of the current first cell pole piece, so that the next single cell pole piece carries the first target number of detection marks; the first target number is obtained based on the first cell pole piece number and the target number.

[0018] Through the above-mentioned technical means, the multiple inspection marks on the next single-cell electrode are checked to see if they are missing, and supplemented if they are missing. In this way, the flying marks and missed marks during the movement of the electrode material strip are supplemented, and the outflow of defective products in the entire previous process is reduced in the die-cutting process, thereby ensuring the product quality of the lithium battery cells produced and reducing the possibility of defective cells entering the market.

[0019] In some embodiments, based on the detection results, it is determined whether to re-label the next single-cell pole piece, including: in response to detecting that the next single-cell pole piece has a defect, stopping setting a detection mark on the next single-cell pole piece that indicates that the next single-cell pole piece has a defect, and maintaining the target number of detection marks on the next single-cell pole piece.

[0020] Through the above-mentioned technical means, by preventing the logic of re-labeling the battery cell pole piece, after the target battery cell pole piece has been re-labeled, even if the next single battery cell pole piece is also a defective chip, the next single battery cell pole piece will not have a change in the number of labels, which will cause the next process to be unable to locate the target battery cell pole piece, thereby improving the accuracy of locating the defective battery cell pole piece.

[0021] In a second aspect, an embodiment of the present application provides a labeling device, which includes: a labeling machine for labeling a single-cell electrode sheet detected to be defective in an electrode sheet strip; an identification sensor, located after the labeling machine in the direction of transmission of the electrode sheet strip, for detecting whether a single-cell electrode sheet with defects is missing; a detection camera, located before the labeling machine in the direction of transmission of the electrode sheet strip, for detecting whether a single-cell electrode sheet has defects; a controller, for responding to a missing label signal for a target cell electrode sheet, to control the electrode sheet strip to decelerate; wherein the target The cell pole piece is a single cell pole piece detected to be defective in the pole piece strip, the pole piece strip comprising a plurality of undivided single cell pole pieces; in response to the pole piece strip stopping conveyance, determining the number of single cell pole pieces that pass through the labeling position since the pole piece strip slows down and the current cell pole piece corresponding to the labeling position; continuing to convey the pole piece strip, labeling the next single cell pole piece of the current cell pole piece, so that the next single cell pole piece carries a target number of detection marks, to complete the re-labeling of the target cell pole piece; the target number is obtained based on the number of cell pole pieces.

[0022] Through the above-mentioned technical means, by detecting the marks on the defective single-cell pole pieces in the moving pole piece material strip, the defective pole pieces that are missing the marks can be automatically re-marked, so that each defective cell pole piece in the pole piece material strip can be located in the subsequent process, replacing the method of manual rewinding and re-marking, reducing the problems of manual omission of re-marking, non-re-marking, and wrong re-marking position, and at the same time reducing the high-risk problems of wrinkling, folding, decarbonization of the pole piece caused by manual rewinding, and reducing the damage to the pole piece; and, through automatic re-marking, the outflow of defective products can be reduced and the battery yield can be improved; at the same time, with the full automation productivity and production efficiency of battery manufacturing becoming higher and higher, the automatic re-marking of defective products after missing the marks can be completed accurately and stably, which can improve product quality, improve production efficiency, reduce the outflow of defective products, and ensure the safety of produced batteries, which has very important practical production significance.

[0023] In some embodiments, a transmission device is used to transfer the battery cell electrode from the unwinding drum to the winding drum; a pulse counter is arranged on the transmission device, and is used to determine the number of rotations of the transmission device; the controller is also used to obtain the number of rotations of the transmission device that transports the electrode sheet tape from the time when the electrode sheet tape is decelerated to the time when the electrode sheet tape stops being transported, and the electrode sheet length of a single battery cell electrode sheet; based on the number of rotations and the radius of the transmission device, the length of the electrode sheet tape from the time when the electrode sheet tape is decelerated to the time when the electrode sheet tape stops being transported is determined; based on the pole sheet length and the tape length, the number of battery cell electrode sheets is determined.

[0024] In some embodiments, the controller is also used to obtain a first identification number of detection marks issued by the labeling machine and a second identification number of detection marks recognized by the identification sensor in response to the pole piece material strip stopping conveyance; compare the first identification number with the second identification number to obtain a comparison result; and continue conveying the pole piece material strip in response to the comparison result satisfying the comparison condition.

[0025] Through the above-mentioned technical means, the labeling machine and identification sensor are inspected every time the machine is shut down, which reduces the possibility of missing labels due to abnormalities of the labeling machine and identification sensor during the labeling process, and ensures that defective battery cell electrodes are not left unmarked during the die-cutting process, thereby reducing the possibility of defective battery cells flowing out.

[0026] 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

[0027] Figure 1 is a schematic diagram of the structure of the labeling device provided in an embodiment of the present application;

[0028] Figure 2 This is an optional process diagram of the method for supplementing the mark provided in the embodiment of the present application. Figure 1 ;

[0029] Figure 3 This is an optional process diagram of the method for supplementing the mark provided in the embodiment of the present application. Figure 2 ;

[0030] Figure 4 This is an optional process diagram of the method for supplementing the mark provided in the embodiment of the present application. Figure 3 ;

[0031] Figure 5 This is an optional process diagram of the method for supplementing the mark provided in the embodiment of the present application. Figure 4 ;

[0032] Figure 6 This is a flowchart of automatically supplementing the label after the label of a defective electrode is missed, provided in an embodiment of the present application;

[0033] Figure 7 This is a logic flow chart of automatic re-labeling after a defective electrode is missing a label, as provided in an embodiment of the present application. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical solutions and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings. The described embodiments should not be regarded as limiting the present application. All other embodiments obtained by ordinary technicians in the field without making creative work are within the scope of protection of this application.

[0035] In the following description, reference is made to "some embodiments", which describe a subset of all possible embodiments, but it is understood that "some embodiments" may be the same subset or different subsets of all possible embodiments, and may be combined with each other without conflict. Unless otherwise defined, all technical and scientific terms used in the embodiments of the present application have the same meaning as those commonly understood by those skilled in the art of the technical field of the embodiments of the present application. The terms used in the embodiments of the present application are only for the purpose of describing the embodiments of the present application and are not intended to limit the present application.

[0036] New energy batteries are increasingly used in life and industry. New energy batteries are not only used in energy storage power systems such as hydropower, thermal power, wind power and solar power stations, but are also widely used in electric vehicles such as electric bicycles, electric motorcycles, electric vehicles, and aerospace and other fields. With the continuous expansion of the application field of power batteries, the market demand is also constantly expanding. In the embodiments of the present application, the battery involved may be a battery cell, also known as a battery cell. A battery cell refers to a basic unit that can realize the mutual conversion of chemical energy and electrical energy, which can be used to make a battery module or a battery pack, and thus used to supply power to an electrical device. A battery cell may be a secondary battery, which refers to a battery cell that can be used to activate the active material by charging after the battery cell is discharged. The battery cell may be a lithium-ion battery, a sodium-ion battery, a sodium-lithium-ion battery, a lithium metal battery, a sodium metal battery, a lithium-sulfur battery, a magnesium-ion battery, a nickel-hydrogen battery, a nickel-cadmium battery, a lead-acid battery, etc., and the embodiments of the present application are not limited to this.

[0037] In the embodiment of the present application, the battery cell may refer to a battery cell of any shape, such as a square battery cell, a round battery cell, etc. And the battery cell usually refers to a battery cell, which is one of the basic units that constitute the battery. The battery cell is the core component of the battery and is responsible for storing and releasing electrical energy. The battery cell may be: a lithium-ion battery cell (Li-ion Cell), a lithium polymer battery cell (Li-polymer Cell), a nickel-metal hydride battery cell (NiMH Cell), etc. The embodiment of the present application does not impose any restrictions on the type of battery cell, which can be selected according to the actual application scenario. In the embodiment of the present application, the battery cell is the core component of the battery pack, and a battery pack usually includes multiple batteries, which are combined together to provide the required power capacity and voltage. The components of the battery pack include at least: battery cells, battery management system (BMS, Battery Management System), housing, connecting harness, connector and interface, etc. These components work together to combine the battery cells into a fully functional battery pack for various application scenarios. For example, the battery pack can be applied to electric vehicles, energy storage systems, portable electrical equipment, solar energy systems, wind energy systems, emergency backup power supplies, power tools or electric bicycles, etc. The present application embodiment does not make any limitation to this, and the specific selection can be made according to the actual application scenario.

[0038] It should be noted that the battery pack can use different types of battery cells, such as lithium-ion batteries, nickel-metal hydride batteries, lithium polymer batteries, etc., depending on the needs and performance requirements of the actual application.

[0039] In the embodiment of the present application, the battery may also be a single physical module including one or more battery cells to provide higher voltage and capacity. When there are multiple battery cells, the multiple battery cells are connected in series, in parallel or in hybrid connection through a busbar component.

[0040] At present, in the battery production process, when defective lithium battery electrodes appear in the stacking or winding process, the machine is slowed down and stopped, and the electrode material tape rolled into the reel is manually rewound to check and determine which electrodes have defects, and the defective electrodes are relabeled. The relabeling is usually done by manually sticking a yellow label (i.e., the detection mark) to a position close to the electrode positioning hole (for example, it can be the mark hole or other mark of the electrode). After confirming that it is properly affixed, all the rewound materials are rewound into the tube; if it is determined that there are no defects, the yellow label is not affixed, and the material is manually rolled into the tube.

[0041] However, with the increasing speed and efficiency of manufacturing, the manual re-labeling method after defective battery cell electrodes are missing labels is prone to missing labels. When the relevant technology detects that the electrode is missing a label, it slows down and stops the machine, and manually rewinds the material rolled into the reel for re-labeling. However, manual re-labeling is not only prone to marking the wrong position, but also causes problems such as wrinkling and decarbonization of the electrode during rewinding, causing more damage to the electrode. Moreover, with the development of production technology, the speed of the electrode material tape is faster, and the length of manual rewinding is longer, which will cause more damage to the electrode and lead to higher costs.

[0042] The die-cutting process is the quality checkpoint of the entire front process in battery manufacturing. If there is any missing label in the die-cutting process, it will definitely lead to the defective products in the front process being wound into defective battery cells and entering the market, causing battery quality problems.

[0043] In order to alleviate the problems existing in the related art, the applicant believes that in the production process of lithium battery die-cutting, when there is a problem of missing labels and bad products needing to be scrapped, the equipment can automatically connect the labels to replace the manual rewinding and re-labeling, reducing the risk of bad product outflow and bad product reproduction. It not only solves the problem that manual labeling is not only easy to make the wrong position, but also causes wrinkling and decarbonization of the pole piece during rewinding, causing more pole pieces to be damaged, but also avoids the problem that the length of manual rewinding is long, which will cause more pole piece damage.

[0044] Based on the above considerations, the inventor has conducted in-depth research and provided a method for supplementary labeling. After identifying that the target battery cell electrode is missing a label, the electrode material belt is controlled to stop conveying. After the electrode material belt stops, the number of single battery cell electrode sheets passing through the labeling position and the current battery cell electrode sheet corresponding to the labeling position are determined since the electrode material belt stops conveying. After the electrode material belt is conveyed again, the next single battery cell electrode sheet of the current battery cell electrode sheet is labeled, so that the next single battery cell electrode sheet carries the target number of detection marks to complete the supplementary labeling of the target battery cell electrode sheet.

[0045] In this way, by detecting the mark on the defective single-cell electrode in the moving electrode material strip, the defective electrode that is missing the mark is automatically re-marked, so that each defective cell electrode in the electrode material strip can be located in the subsequent process, replacing the method of manual rewinding and re-marking, reducing the problems of manual omission of re-marking, non-re-marking and wrong re-marking position, and at the same time reducing the problem of manual rewinding of the electrode material strip for a long time, resulting in more wrinkling, folding, decarbonization of the electrode and other problems, thereby reducing the damage to the electrode sheet; and through automatic re-marking, defective cells can be scrapped based on the detection mark in the subsequent process, which can reduce the outflow of defective products and improve the battery yield; at the same time, with the increasing efficiency of battery manufacturing, the automatic re-marking of defective products after missing labels can be completed accurately and stably, which can not only improve product quality, improve production efficiency, and reduce the outflow of defective products, but also ensure the safety of produced batteries, which has very important practical production significance.

[0046] Based on the above-mentioned labeling method, an embodiment of the present application provides a labeling device, through which the labeling method provided in the embodiment of the present application is implemented. Figure 1 is a schematic diagram of the structure of the labeling device provided in the embodiment of the present application, such as Figure 1 As shown, the labeling equipment includes a detection camera 101, a labeling machine 102, a logo sensor 103, a pulse counter 104, a reel 105, a reel 106, a smoothing device 107, a transmission device 108, a camera device 109, a pole piece cutting device 110 and a controller ( Figure 1 Hardware such as those not shown in the figure.

[0047] In some embodiments, when the labeling equipment is running, the pole piece material strip 10 passes through the smoothing device 107, the transmission device 108 and the camera device 109 from the unwinding drum 105, and reaches the winding drum 106 along the tape-feeding direction A. Among them, the smoothing device 107, the transmission device 108, and the camera device 109 are used for the transmission of the pole piece material strip 10, which can reduce the friction and wear between the pole piece and the pole piece. The smoothing device 107 can keep the surface of the pole piece material strip smooth and flat. The transmission device 108 is provided with a pulse counter. The pulse counter has a probability of one pulse for each rotation of the transmission device, which can be used to determine the length of the traveling pole piece. The camera device 109 is used to make the pole piece material strip flat, and the detection camera 101 can collect all the pole piece material strips.

[0048] In the embodiment of the present application, the labeling equipment is used for quality inspection in the battery manufacturing process in the die-cutting process of battery manufacturing. The battery cell electrode strip in the unwinding drum 105 of the labeling equipment is an integral roll, that is, the electrode strip that has not been cut into individual battery cell electrodes. All the electrodes in the unwinding drum are defect-checked, and the defective battery cell electrodes are labeled. After all the electrodes enter the winding drum, the winding drum will enter the lamination or winding process. The lamination or winding process will cut the electrode strip in the winding drum, remove the defective electrodes with labels, and wind the defect-free electrodes to form a battery cell.

[0049] In the embodiment of the present application, the controller can be any one of a programmable logic controller (PLC), a single-chip microcomputer, a middle computer and a host computer, and the controller is connected to the hardware in the labeling equipment; the detection camera 101 can be a linear array camera, a two-dimensional camera system, a three-dimensional vision camera, a charge coupled device (CCD, Charge Coupled Device) and an industrial camera and other devices that can perform image acquisition, which is used to collect the front and back images of each single battery cell electrode and send them to the industrial computer corresponding to the detection camera. The industrial computer detects whether there are defects in the battery cell electrode and sends the detection results to the controller. The labeling machine 102 is used to label the single-cell pole piece detected to be defective based on the detection results sent by the controller. The label affixed by the labeling machine can be made of paper or metal foil and have adhesive to facilitate peeling and sticking; the identification sensor 103 can be any identification device, which is used to detect whether the identification on the defective single-cell pole piece is missing and whether the label position is reasonable. If the identification is missing, an alarm signal is sent to the controller, and the controller controls the pole piece material strip to slow down and stop; the pulse counter 104 is set on the transmission device 108. When the transmission device 108 rotates, a pulse signal is generated for each rotation. The pulse counter 104 will record it to determine the number of rotations of the transmission device 108, and then calculate the forward length of the pole piece material strip.

[0050] In some embodiments, the electrode sheet cutting device 110 is used to cut the electrode sheet strip in the direction of the electrode sheet strip transmission. The electrode sheet strip can be cut in width according to the width of the electrode sheet required by the battery cell to obtain the first battery cell electrode sheet and the second battery cell electrode sheet. The detection camera 101 can perform defect detection on the first battery cell electrode sheet and the second battery cell electrode sheet respectively. The electrode sheet cutting device 110 is also used to cut the pole ear and positioning hole of each battery cell electrode sheet. The positioning hole can be located at the head of each single battery cell electrode sheet, and is used to position each single battery cell electrode sheet on the continuous electrode sheet strip.

[0051] In some embodiments, the inspection cameras 101 are divided into two groups, each of which performs defect inspection on the front and back sides of the pole piece strip.

[0052] In the embodiment of the present application, the execution body of the labeling method is the controller of the labeling equipment. The technical solution of the present application will be described in detail below with reference to the accompanying drawings.

[0053] based on Figure 1 The structure of the labeling equipment shown, Figure 2 This is an optional process diagram of the method for supplementing the mark provided in the embodiment of the present application. Figure 1 ,like Figure 2 As shown, the method for supplementing the mark provided in the embodiment of the present application can be implemented through steps S201 to S203:

[0054] Step S201, in response to a missing mark signal for a target cell electrode sheet, controlling the electrode sheet tape to stop conveying; wherein the target cell electrode sheet is a single cell electrode sheet detected to have defects in the electrode sheet tape, and the electrode sheet tape includes a plurality of undivided single cell electrode sheets.

[0055] like Figure 1 As shown, in the die-cutting process, the electrode sheet material strip enters the reel from the unwinding reel along the tape feeding direction, and the electrode sheet material strip includes multiple uncut single-cell electrode sheets. The electrode sheet cutting device in the labeling equipment cuts the electrode ears and cuts out the positioning holes (for example, the mark holes located at the head of each single-cell electrode sheet) for each single-cell electrode sheet based on the product information of the battery cell (for example, the length of each single-cell electrode sheet).

[0056] Each side of the electrode strip is inspected by the inspection camera. After the inspection camera collects the electrode image of each single cell electrode, it is sent to the industrial computer connected to the inspection camera. The industrial computer recognizes the image of each single cell electrode and determines whether each cell electrode is defective (NG, No Good). The industrial computer sends a 0 or 1 signal to the controller of the labeling equipment to indicate whether the collected image is defective. Here, the inspection camera detects that the defective single cell electrode is a defective electrode, and the defective electrode that is missing after labeling is the target cell electrode. When the identification sensor detects that the target cell electrode is missing or flying after labeling, it will send a missing label signal for the target cell electrode to the PLC.

[0057] The controller controls the labeling machine to label the defective battery cell pole piece based on the signal sent by the industrial computer to mark the battery cell pole piece as defective, and the defective pole piece is scrapped during the lamination or winding process to prevent defective products from flowing out.

[0058] In some embodiments, network delays or other problems may occur on the battery production line. In this case, there will be a delay in the signal sent by the industrial computer of the detection camera to the controller to indicate whether a single battery cell electrode is defective. The electrode material belt in the labeling equipment moves at a fast speed, which may cause the labeling machine to fail to label the defective battery cell in time, or the labeling position may be incorrect, resulting in the outflow of defective products. In order to solve this problem, an embodiment of the present application proposes an anti-logic labeling method, that is, the labeling machine labels each single battery cell electrode by default, and each battery cell electrode has defects by default. Only when the industrial computer of the detection camera determines that there is no defect, it sends a signal to the controller, and the controller controls the labeling machine not to label the battery cell electrode, which can avoid the outflow of defective products in the case of network delays.

[0059] In an embodiment of the present application, after the labeling machine labels the target cell electrode (i.e., detects the mark), it can send a signal to the PLC that the target cell electrode has been labeled. After receiving the signal, the PLC controls the mark sensor to identify whether there is a mark on the target cell electrode. The mark sensor can determine whether the cell electrode currently passing through the mark sensor is labeled by the labeling machine based on the travel speed of the electrode strip and the distance between the mark sensor and the labeling machine. If so, it identifies whether there is a detection mark on the single cell electrode. If there is, no operation is performed. If not, the cell electrode is the target cell electrode. The mark sensor sends a missing mark signal for the target cell electrode to the controller, the controller alarms, and controls the electrode strip to stop conveying. Here, the pole piece material strip stops conveying when the controller sends a stop signal to the labeling equipment. In response to the stop signal, the machine controls the smoothing device, the transmission device and the camera device to decelerate until the pole piece material strip stops. During the deceleration and shutdown process, the detection camera, the labeling machine and the identification sensor work normally to avoid defective chips in some single-cell pole pieces in the pole piece material strip passing through the deceleration process.

[0060] Step S202, in response to the electrode material belt stopping conveying, determining the number of single cell electrode sheets passing through the labeling position since the electrode material belt slowed down and the current cell electrode sheet corresponding to the labeling position.

[0061] In an embodiment of the present application, after the pole piece tape stops, the labeling equipment also passes through at least one single battery cell pole piece during the deceleration of the pole piece tape. The number n of single battery cell pole pieces passed through is determined according to the tape running speed of the pole piece tape. For example, if the length of a single battery cell pole piece is 10 meters (m), if the traveling speed of the pole piece tape is 80m / min, the number n of battery cell pole pieces passed through by the pole piece tape when the labeling equipment stops may be 2; if the traveling speed of the pole piece tape is 140m / min, the number n of battery cell pole pieces passed through by the pole piece tape when the labeling equipment stops may be 4.

[0062] In some embodiments, the distance traveled by the pole piece strip during deceleration can be determined based on the number of revolutions of the transmission device during deceleration and the circumference of the transmission device, thereby determining the number n of battery cell pole pieces passing through the labeling device.

[0063] In some embodiments, since only the pole piece strip is decelerated and stopped during the shutdown of the labeling equipment, the pole piece cutting device and other hardware continue to cut the decelerated pole piece, therefore, the machine corresponding to the labeling equipment can also record how many positioning holes the pole piece cutting device cuts during the shutdown of the labeling equipment to determine the number n of cell pole pieces that the labeling equipment passes through when the pole piece strip is decelerated and stopped to completely stopped. Here, the number of cell pole pieces that the labeling equipment passes through during the shutdown is equal to the number of positioning holes cut by the pole piece cutting device during the shutdown of the labeling equipment.

[0064] Here, the machine is connected to the controller, and the machine is used to drive the rotation of the transmission device, smoothing device, etc. The controller controls the pole piece material belt to stop, which can mean that the controller sends a stop command to the machine, so that the machine drives the transmission device, smoothing device, etc. to slow down until the pole piece material belt stops.

[0065] In some embodiments, the labeling position can be the position of the labeling machine, and the number of battery cell pole sheets is the number of single battery cell pole sheets from the time the pole sheet strip is decelerated, that is, after the target battery cell pole sheet, to the current battery cell pole sheet at the labeling position. The number of battery cell pole sheets includes the current battery cell pole sheet, but does not include the target battery cell pole sheet.

[0066] In some embodiments, when the electrode strip stops conveying, the controller can determine the current battery cell electrode that is staying in the labeling machine based on the labeling position. Since the labeling machine provided in the embodiment of the present application needs to affix the detection mark near the positioning hole, the controller needs to determine the relative position relationship between the current battery cell electrode and the labeling machine. If the positioning hole of the current battery cell electrode has passed through the labeling machine, the next battery cell electrode of the current battery cell electrode is supplemented with n+1. If the positioning hole of the current battery cell electrode has not passed through the labeling machine, the current battery cell electrode can be supplemented with n. The number of supplements is different in the two cases, and both are used to characterize the target battery cell electrode as a defective electrode.

[0067] In some embodiments, after the PLC determines the number of battery cell pole pieces, the number of battery cell pole pieces can be saved in a register of the PLC, and the data in the register can be cleared after the labeling machine completes the labeling correctly.

[0068] Step S203, continue to convey the electrode material strip, and label the next single cell electrode sheet of the current cell electrode sheet, so that the next single cell electrode sheet carries the target number of detection marks to complete the labeling of the target cell electrode sheet; the target number is obtained based on the number of cell electrode sheets.

[0069] In an embodiment of the present application, after determining the number of battery cell pole pieces that pass through the labeling position during the stop of the pole piece strip and the current battery cell pole piece corresponding to the labeling position, the labeling machine can be controlled to label the next battery cell pole piece after the current battery cell pole piece, so that the next battery cell pole piece carries a target number of detection marks, and the target number is equal to the number of battery cell pole pieces plus one (i.e., n+1), indicating that the n+1th battery cell pole piece before the next battery cell pole piece is a target cell pole piece that has been missed.

[0070] In an embodiment of the present application, after all the electrode material strips are inspected, they will enter the take-up drum, and the entire take-up drum will enter the next process (for example, the winding process). During the winding process, the running direction of the electrode material strip is opposite to the running direction during the die-cutting process. That is to say, in the die-cutting process, the next single-cell electrode strip to be supplemented is after the target cell electrode strip, and in the winding process, the next single-cell electrode strip to be supplemented is before the target cell electrode strip, that is, the single-cell electrode strip to be supplemented will appear in the winding process first. Therefore, the target cell electrode strip after the single-cell electrode strip with the target number of inspection marks can be located to scrap the target cell electrode strip that has missed the mark, thereby preventing defective products from entering the market.

[0071] In some embodiments, if the positioning hole of the current battery cell pole piece has not passed through the labeling machine, the current battery cell pole piece can be supplemented with a label. At this time, the target number is n, that is, the labeling machine is controlled to affix n labels near the positioning hole of the current battery cell pole piece, indicating that the nth battery cell pole piece before the current battery cell pole piece is the target battery cell pole piece.

[0072] In the embodiment of the present application, by detecting the mark on the defective single-cell electrode in the moving electrode material strip, the defective electrode that is missing the mark is automatically re-marked, so that each defective battery cell electrode in the electrode material strip can be located in the subsequent process, replacing the method of manual rewinding and re-marking, reducing the problems of manual omission of re-marking, non-re-marking, and wrong re-marking position, and at the same time reducing the high-risk problems of wrinkling, folding, decarbonization of the electrode caused by manual rewinding, and reducing the damage to the electrode; and through automatic re-marking, the outflow of defective products can be reduced and the battery yield can be improved; at the same time, with the full automation productivity and production efficiency of battery manufacturing becoming higher and higher, it can accurately and stably complete the automatic re-marking of bad products after missing marking, which can improve product quality, improve production efficiency, reduce the outflow of bad products, and ensure the safety of produced batteries, which has very important practical production significance.

[0073] In some embodiments, the number of cell pole pieces can be calculated based on the number of rotations of the transmission device during the deceleration process of the labeling device and the circumference of the transmission device. Therefore, the determination of the number of cell pole pieces in step S202 can be achieved through steps S2021 to S2023:

[0074] Step S2021, obtaining the number of rotations of the transmission device that transmits the pole piece material strip and the pole piece length of the single cell pole piece from the time when the pole piece material strip slows down to the time when the pole piece material strip stops transmitting.

[0075] In the embodiment of the present application, the transmission device is used to convey the electrode sheet tape, so the number of battery cell electrode sheets can be calculated based on the length of the electrode sheet tape from deceleration to the stop of conveyance of the electrode sheet tape and the length of each single battery cell electrode sheet.

[0076] In some embodiments, the labeling equipment includes a transmission device and a pulse counter arranged on the transmission device. From the time when the pole piece material belt starts to decelerate to the time when the pole piece material belt stops conveying, the controller can obtain the number of pulses of the pulse counter on the transmission device. The number of pulses represents the number of rotations of the transmission device from the time when the pole piece material belt starts to decelerate to the time when the pole piece material belt stops conveying.

[0077] In some embodiments, the product information of the battery cell electrode piece may include the length of a single battery cell electrode piece, for example, 10 m.

[0078] Step S2022: Based on the number of rotations and the radius of the transmission device, determine the length of the pole piece tape from the time when the pole piece tape decelerates to the time when the pole piece tape stops being transported.

[0079] In an embodiment of the present application, the transmission device may be a structure such as a transmission roller for conveying materials. Since the transmission device conveys the material by fitting with the pole piece tape, the length of the tape traversed by the pole piece tape from the time the pole piece tape is decelerated to the time the pole piece tape stops conveying can be calculated by the number of rotations and the circumference of the transmission device.

[0080] In some embodiments, the travel distance L can be determined by formula (1):

[0081] (1);

[0082] Wherein, a is the number of rotations of the transmission device, and r is the radius of the transmission device.

[0083] In some embodiments, the labeling device may include a distance detection sensor for detecting the length of the pole piece strip from the time when the pole piece strip slows down to the time when the pole piece strip stops. The distance detection sensor may be a radar distance measurement sensor or an optical distance measurement sensor.

[0084] Step S2023: Determine the number of battery cell pole pieces based on the pole piece length and the material strip length.

[0085] In the embodiment of the present application, based on the strip length of the electrode strip and the electrode length of the single cell electrode, the number of cell electrodes that the labeling equipment passes through when it slows down and stops can be obtained. Here, since the identification sensor will start to shut down when it senses that the target cell electrode is missing a label, the target cell electrode may have passed the labeling position at this time. At this time, the quotient of the strip length and the electrode length is used as the number of cell electrodes, and one is added if there is a decimal. For example, when the quotient is 3.65, the number of cell electrodes is 4; if the target cell electrode does not pass the labeling position during deceleration, it is necessary to record the remaining length of the target cell electrode. When calculating the number of cell electrodes, it is necessary to subtract the remaining length of the target cell electrode from the strip length, and then divide it by the electrode length to calculate the number of cell electrodes.

[0086] The embodiment of the present application can accurately calculate the number of battery cell pole pieces that the pole piece material strip passes through from deceleration to complete stop through the number of rotations of the transmission device on the labeling equipment during the deceleration and shutdown process, so that when performing re-labeling, the number of detection marks used to locate defective battery cells can be accurately determined, so that defective pole pieces can be accurately located in subsequent processes.

[0087] In some embodiments, step S203 may be implemented by step S2031:

[0088] Step S2031, set a target number of detection marks in sequence within a preset range after the positioning hole of the next single-cell pole piece, so that the next single-cell pole piece carries the target number of detection marks, for scrapping the single-cell pole piece carrying the target number of detection marks and the target number of single-cell pole pieces after the single-cell pole piece in the winding or stacking process.

[0089] In the embodiment of the present application, the positioning hole may refer to the Mark hole of a single battery cell pole piece. In the die-cutting process, the Mark hole is used to position the single battery cell pole piece in the pole piece strip. In the winding process, the Mark hole is used to detect and control the length of the pole piece. When the Mark hole is detected, cutting will be performed to complete the winding of a pole group.

[0090] Here, when labeling defective batteries, the labeling machine needs to stick the inspection mark within the preset range after the positioning hole (for example, 800±100mm away from the Mark hole), where the preset range after the positioning hole refers to the preset range within 800±100mm after the positioning hole in the tape running direction of the pole piece.

[0091] In an embodiment of the present application, the labeling machine can mark the first detection mark within a preset range after the positioning hole of the next battery cell electrode, and then mark a detection mark every fixed distance (for example, 300±20mm) during the movement of the battery cell electrode, until the target number (n+1) detection marks are marked in sequence during the movement of the battery cell electrode.

[0092] In an embodiment of the present application, the detection mark is used to scrap single cell pole sheets carrying a target number of detection marks and a target number of single cell pole sheets after the cell pole sheet (i.e., the target cell pole sheets) during the winding or stacking process to prevent defective cells from being wound into battery cells.

[0093] When supplementing the marking in the embodiment of the present application, the target number of inspection marks are sequentially punched behind the positioning hole on the next battery cell electrode, thereby reducing the problem of some inspection marks being covered when multiple inspection marks are punched, so that when the defective electrode is scrapped through the inspection mark in the subsequent winding process, the defective battery cell can be accurately located, and the defective battery cell will not be wrongly found due to the inspection mark being covered, resulting in the defective electrode being wound into a defective battery cell, thereby improving the yield of the battery cell.

[0094] In some embodiments, when the labeling machine affixes multiple labels to a certain battery cell electrode, the distance between two adjacent labels must meet the distance requirement, otherwise the PLC needs to alarm, shut down and check whether there is a problem with the labeling machine. Figure 3 This is an optional process diagram of the method for supplementing the mark provided in the embodiment of the present application. Figure 2 ,like Figure 3 As shown, the method for supplementing the mark provided in the embodiment of the present application may also include step S301 and step S302:

[0095] Step S301, detecting the distance between two adjacent detection marks in the next single cell electrode.

[0096] In the embodiment of the present application, the controller can control the identification sensor to detect the identification distance between two adjacent detection identifications in the battery cell electrode piece carrying multiple detection identifications.

[0097] In some embodiments, the labeling device may include a distance detection sensor for detecting the distance between two adjacent detection marks.

[0098] In some embodiments, the identification distance between two adjacent detection identifications can be determined by the number of rotations of the transmission device when the identification sensor recognizes two detection identifications respectively. Correspondingly, step S301 can be implemented by steps S3011 to S3012:

[0099] Step S3011, obtaining a first rotation number of the transmission device when any detection mark in the next single-cell electrode passes through the detection position and a second rotation number of the next detection mark passing through the detection position.

[0100] In the embodiment of the present application, the number of rotations of the transmission device can be recorded by a pulse counter set on the transmission transpose. The pulse counter counts once for each rotation. If the rotation is less than one circle, the pulse counter will also record the corresponding data.

[0101] In some embodiments, when the identification sensor detects any detection identification, the controller obtains the first pulse number n1 of the current pulse counter as the first rotation number. Here, obtaining the first pulse number of the pulse counter can be when the identification sensor recognizes the appearance of the detection identification during the movement of the battery cell electrode.

[0102] In the embodiment of the present application, when the identification sensor recognizes the next detection identification, the controller obtains the second pulse number n2 of the current pulse counter as the second rotation number.

[0103] Step S3012: determining a mark spacing between two adjacent detection marks based on the first rotation number, the second rotation number, and the radius of the transmission device.

[0104] In some embodiments, based on the first pulse number n1 and the second pulse number n2, the pulse difference n2-n1 between two adjacent detection marks can be determined, and the pulse difference is used to characterize the difference in the number of rotations of the transmission device, thereby calculating the distance between two adjacent detection marks.

[0105] In the embodiment of the present application, the mark spacing S between two adjacent detection marks can be achieved by formula (2):

[0106] (2);

[0107] Where r is the radius of the transmission.

[0108] The embodiment of the present application calculates the spacing between two adjacent detection marks by the number of rotations of the transmission device between two adjacent detection marks and the circumference of the transmission device. It can accurately calculate the spacing between marks and control the distance between two adjacent marks among multiple detection marks, so that the winding or lamination process can accurately identify multiple marks.

[0109] Step S302: In response to the mark spacing not satisfying the joint mark spacing condition, the electrode strip is controlled to stop being conveyed.

[0110] In an embodiment of the present application, the joint label spacing condition may refer to the spacing between two adjacent detection marks being between 300±20mm. If the distance between two adjacent detection marks exceeds this range, it means that the mark spacing between the two adjacent detection marks does not meet the joint label spacing condition, indicating that an abnormality has occurred in the labeling machine. At this time, it is necessary to send a signal to the PLC to alarm and stop the machine to check the labeling machine. When there is no abnormality in the labeling machine, restart the labeling equipment again to continue conveying the electrode material strip.

[0111] The embodiment of the present application provides a fool-proof logic when automatically supplementing multiple detection marks, which detects the distance between any two detection marks among the multiple detection marks, so that the spacing between two adjacent detection marks among the multiple detection marks is the same, and other detection marks will not be covered when the number of detection marks is large, resulting in the problem of being unable to be recognized. Therefore, when identifying the number of detection marks in the next process, the number of detection marks on the battery cell electrode can be accurately identified.

[0112] In some embodiments, Figure 4 This is an optional process diagram of the method for supplementing the mark provided in the embodiment of the present application. Figure 4 ,like Figure 4 As shown, the method for supplementing the mark provided in the embodiment of the present application may also include step S401 to step S402:

[0113] Step S401, inspect the next single cell pole piece to obtain an inspection result; the inspection result at least includes the number and defects of the inspection marks on the next single cell pole piece.

[0114] In an embodiment of the present application, when the target battery cell pole piece is supplementally marked, the next single battery cell pole piece of the current battery cell pole piece is supplementally marked. At this time, the next single battery cell pole piece may also be a defective pole piece. Therefore, it is necessary to perform defect detection on the next single battery cell pole piece to determine whether the battery cell pole piece has defects, that is, the detection result may be that the next single battery cell pole piece is defective or not.

[0115] In some embodiments, after the labeling machine affixes a target number of detection marks on the next single-cell electrode of the current battery cell, the electrode material strip is still moving at high speed, and the detection mark may fall off during the movement. Therefore, the identification sensor also needs to determine whether the detection mark on the next single-cell electrode has fallen off, that is, the detection result can be whether the number of marks on the next single-cell electrode is equal to the target number.

[0116] Step S402: Based on the detection result, determine whether to perform re-labeling on the next single cell electrode.

[0117] In the embodiment of the present application, based on the detection result of the next single-cell electrode sheet, it can be determined whether to supplement the labeling of the next single-cell electrode sheet. For example, if the detection result is that the next single-cell electrode sheet is defective, a detection mark should be placed on the single-cell electrode sheet to indicate that the single-cell electrode sheet is defective. However, in the supplementary labeling method provided in the embodiment of the present application, the target number n+1 detection marks have been affixed to the next single-cell electrode sheet. If another detection mark is affixed, the number of detection marks on the single-cell electrode sheet will become n+2, which will result in the inability to locate the target cell electrode sheet in the next winding process. Therefore, in response to the detection result that the next cell electrode sheet is defective, the controller controls the labeling machine not to set a detection mark indicating that the next cell electrode sheet is defective, and keeps the next cell electrode sheet always carrying the target number of detection marks. In this way, the winding process will scrap the next single-cell electrode sheet and the target cell electrode sheet.

[0118] In some embodiments, if the detection result shows that the number of labels on the next single-cell electrode sheet is less than the target number, it means that the next single-cell electrode sheet is missing a label, which will result in the inability to locate the target cell electrode sheet in the next winding process. At this time, the label sensor sends a signal to the PLC again, and the PLC controls the electrode sheet material strip to slow down and stop. According to the number of single-cell electrode sheets passing the labeling position during the deceleration and stop process, the label is supplemented again to locate the target cell electrode sheet.

[0119] After the next single-cell pole piece is supplemented with labels, the embodiment of the present application can detect the marks on the next single-cell pole piece and the pole piece. When the number of detected marks is incorrect or the pole piece is also a defective pole piece, it is determined whether the next single-cell pole piece should be supplemented with labels, so that the target cell pole piece can be located in any case.

[0120] In some embodiments, if it is detected that the target number of detection marks on the next single battery cell electrode are missing, at this time, the number of detection marks on the next single battery cell electrode is incorrect, and the target battery cell electrode cannot be located. It is necessary to stop the machine again and re-locate the battery cell electrode where the defect is located. Figure 5 This is an optional process diagram of the method for supplementing the mark provided in the embodiment of the present application. Figure 5 ,like Figure 5 As shown, step S402 in the tag supplementation method provided in the embodiment of the present application can be implemented through steps S501 to S503:

[0121] Step S501: In response to the number of detection marks on the next single-cell electrode sheet being less than the target number, the electrode sheet material strip is controlled to stop being conveyed.

[0122] In some embodiments, after the labeling machine affixes the target number (n+1) detection marks on the next single-cell electrode sheet of the current battery cell electrode sheet, the electrode sheet material belt is still moving at high speed. The detection mark may fall off during the movement. Therefore, the identification sensor also needs to determine whether the detection mark on the next single-cell electrode sheet has fallen off. If the identification sensor recognizes that the number of detection marks on the next single-cell electrode sheet is less than the target number, the controller controls the labeling equipment to shut down. During the shutdown process, the electrode sheet material belt will continue to move along the tape direction. At this time, it is necessary to determine the number of first battery cell electrodes that the labeling equipment has passed in the process again, and re-label based on the number of first battery cell electrodes to locate the target battery cell electrode sheet.

[0123] Step S502, in response to the stopping of the conveyance of the electrode strip, determining the number of first battery cell electrode strips passing through the labeling position since the conveyance of the electrode strip was stopped and the current first battery cell electrode strip corresponding to the labeling position.

[0124] Step S503, continue to convey the electrode sheet material strip, and label the next single cell electrode sheet of the current first cell electrode sheet, so that the next single cell electrode sheet carries the first target number of detection marks; the first target number is obtained based on the first cell electrode sheet number and the target number.

[0125] In some embodiments, after the cell electrode sheet stops being conveyed, the number a of the first cell electrode sheets passing through the labeling position and the current first cell electrode sheet corresponding to the labeling position are determined since the electrode sheet material belt stops being conveyed. After the electrode sheet material belt is started again, the next single cell electrode sheet of the current first cell electrode sheet is labeled so that the next single cell electrode sheet carries the first target number of detection marks, where the first target number z=(n+1)+(a+1).

[0126] In the embodiment of the present application, a check is performed to see whether multiple inspection marks on the next single-cell electrode are missing, and if so, supplementary marking is performed. In this way, the flying marks and missed marks during the movement of the electrode material strip are supplemented, and the outflow of defective products in the entire previous process is reduced in the die-cutting process, thereby ensuring the product quality of the lithium battery cells produced and reducing the possibility of defective cells entering the market.

[0127] In some embodiments, if the labeling device is started again, and the next cell electrode sheet of the current cell electrode sheet is also a defective cell electrode sheet, since the target number of detection marks already exist on the next cell electrode sheet, the electrode sheet will be scrapped during the winding stage, so the cell electrode sheet will no longer be labeled, otherwise the number of detection marks on the cell electrode sheet will change, and the target cell electrode sheet cannot be located. In order to solve this problem, the labeling method provided in the embodiment of the present application can also include step S1:

[0128] Step S1, in response to detecting that a next single-cell electrode sheet has a defect, stop setting a detection mark indicating that the next single-cell electrode sheet has a defect on the next single-cell electrode sheet, and keep the next single-cell electrode sheet carrying a target number of detection marks.

[0129] In some embodiments, after the labeling device is started again, if the next single cell electrode sheet of the current cell electrode sheet is also a defective electrode sheet, a detection mark should be affixed to the next single cell electrode sheet to indicate that the single cell electrode sheet is defective. However, since the target number n+1 detection marks have been affixed to the next single cell electrode sheet in the labeling method provided in the embodiment of the present application, the single cell electrode sheet will be scrapped in the next process. Therefore, if another detection mark is affixed, the number of detection marks on the single cell electrode sheet will become n+2, which will make it impossible to locate the target cell electrode sheet. In the next winding process, the target cell electrode sheet cannot be scrapped, but the single cell electrode sheet after the target cell electrode sheet will be scrapped.

[0130] Therefore, in response to the detection camera detecting that the next single-cell pole piece has defects, the controller controls the labeling machine to stop setting the detection mark indicating the defect of the next single-cell pole piece on the next single-cell pole piece, and keeps the next single-cell pole piece carrying the target number of detection marks at all times. In this way, the winding process will scrap the next single-cell pole piece and the target cell pole piece.

[0131] In some embodiments, the industrial control machine of the inspection camera will record the defect type and defect location of the defective battery cell.

[0132] The embodiment of the present application implements fool-proofing for the logic of re-labeling the battery cell pole piece, so that after the target battery cell pole piece has been re-labeled, even if the next single battery cell pole piece is also a defective chip, the next single battery cell pole piece will not have a change in the number of labels, which would cause the next process to be unable to locate the target battery cell pole piece, thereby improving the accuracy of locating the defective battery cell pole piece.

[0133] In some embodiments, after the pole piece strip stops, the labeling equipment needs to be checked to avoid labeling omissions due to labeling equipment failure. The labeling method provided in the embodiment of the present application may also include steps S2 to S4:

[0134] Step S2, in response to the pole piece material belt stopping transmission, obtaining the first identification number of the detection identification issued by the labeling machine and the second identification number of the detection identification recognized by the identification sensor.

[0135] In an embodiment of the present application, each time the pole piece material strip stops conveying, the labeling machine or identification sensor needs to be inspected. The inspection can be performed manually by an engineer, or the PLC can obtain the first identification number of the detection identification issued by the labeling machine and the second identification number of the detection identification recognized by the identification sensor for comparison, so as to determine whether the labeling machine is abnormal.

[0136] Step S3: Compare the first identification quantity with the second identification quantity to obtain a comparison result.

[0137] In some embodiments, the PLC compares the first identification quantity of the detection identification issued by the labeling machine with the second identification quantity of the detection identification recognized by the identification sensor to obtain a comparison result, and the comparison result includes being equal to or not equal to.

[0138] Step S4: In response to the comparison result satisfying the comparison condition, continue to convey the electrode strip.

[0139] Here, if the comparison result meets the comparison condition, it means that the number of first identifications is equal to the number of second identifications. At this time, it means that there is no abnormality in the labeling machine and the identification sensor, and they can be restarted; if the comparison result does not meet the comparison condition, it means that the number of first identifications is not equal to the number of second identifications. At this time, it means that the labeling machine or the identification sensor is abnormal and needs to be adjusted. The controller can send an alarm signal to remind the engineer to repair the labeling machine. After the labeling machine is normal, it sends a signal to the controller, and the controller controls the labeling equipment to restart.

[0140] In some embodiments, whether the labeling machine is abnormal can also be determined based on whether the detection mark posted by the labeling machine is within the range of the Mark hole. If the mark posted by the labeling machine is not within the range each time, it means that the labeling machine is abnormal.

[0141] The embodiment of the present application detects the labeling machine and the identification sensor every time the machine is shut down, thereby reducing the possibility of missing labels due to abnormalities of the labeling machine and the identification sensor during the labeling process, ensuring that defective battery cell electrodes are not left unmarked during the die-cutting process, thereby reducing the possibility of defective battery cells flowing out.

[0142] In some embodiments, different battery cells have different specifications. The embodiment of the present application may cut the electrode strip. The supplementary labeling method provided by the embodiment of the present application may further include steps S10 to S20:

[0143] Step S10: In the direction of conveying the electrode sheet strip, controlling the electrode sheet cutting device to cut the electrode sheets of the battery cell to obtain a first electrode sheet strip and a second electrode sheet strip.

[0144] In an embodiment of the present application, the pole piece strip will carry product information when it is included in the die-cutting process. The PLC can obtain the product information of the pole piece strip through the barcode scanner of the die-cutting process. The product information may include the width of the pole piece of a single battery cell, for example, 1m. If the width of the pole piece strip flowing out of the unwinding drum is 2m or more, the controller controls the pole piece cutting device to cut the pole piece strip in width to obtain a first pole piece strip and a second pole piece strip. At this time, the width of the first pole piece strip and the second pole piece strip are both 1m.

[0145] Step S20, controlling the first detection camera to detect the first electrode sheet material strip, and controlling the second detection camera to detect the electrode sheet material strip, to obtain the target battery cell electrode sheet.

[0146] In the embodiment of the present application, based on Figure 1 There can be two sets of hardware facilities from the electrode cutting device to the winding drum, each set performs defect detection on the first electrode material strip and the second electrode material strip respectively, and obtains the defective single-cell electrode strip in the first electrode material strip or the second electrode material strip. If the defective single-cell electrode strip is missed, the steps in the aforementioned supplementary marking method are performed on the defective single-cell electrode strip.

[0147] In an embodiment of the present application, after the first electrode sheet material strip and the second electrode sheet material strip are respectively subjected to other processing (such as coating), they can be used as the cathode and anode of the battery and wound. When winding, the battery cell electrode sheets will be cut into single cell electrode sheets based on the mark holes on the battery cell electrode sheets. Before winding into battery cells, defective cells will be removed based on the detection marks on the single cell electrode sheets to ensure the yield of the battery cells.

[0148] The embodiment of the present application can cut the battery cell pole pieces based on the product information of the battery cell, thereby improving production efficiency.

[0149] In some embodiments, during the deceleration process of the identification sensor alarm, if there is a defective cell electrode in the electrode strip passing by, and the defective cell electrode also happens to be missing a mark, the PLC can count the target cell electrode and the defective cell electrode by two systems, and count the missing marks separately. For example, after the A cell electrode misses a mark, the number of cell electrodes passing through the shutdown is n, and the B cell electrode misses a mark, and the number of cell electrodes passing through the shutdown is m. The A cell electrode is counted at n, and the B cell electrode is counted at m, thereby completing the joint labeling. For example, the first single-cell electrode sheet has defects and is missing a label, which triggers a shutdown and deceleration. However, during the deceleration process, the second single-cell electrode sheet also has defects and is missing a label. At this time, after the electrode sheet material strip stops, the current cell electrode sheet corresponding to the labeling machine is the third single-cell electrode sheet. At this time, the number of cell electrode sheets is 2. After restarting again, the controller controls the labeling machine to put 3 inspection marks on the fourth single-cell electrode sheet, and 3 inspection marks on the fifth single-cell electrode sheet. These four cell electrode sheets will be scrapped in the winding process to prevent the first and second single-cell electrode sheets from flowing out.

[0150] In some embodiments, the PLC can store the inspection data, marking data, missing mark data and supplementary mark data of each roll of pole piece material to the local industrial computer; the inspection camera can bind the supplementary mark numbers on both sides of the pole piece material to the wireless radio frequency (RFID) through the PLC, and upload it to the manufacturing execution system (MES) for storage for data traceability; in the winding process, after a roll of pole piece material is loaded, the RFID supplementary mark value of the pole piece material is read. When the winding process actually senses that the automatic supplementary mark number is inconsistent with the supplementary mark number bound on the MES, an alarm is issued to stop the machine, and the problems such as dropped and flying marks of the pole piece material from the die-cutting process to the winding process are checked.

[0151] Based on the labeling method provided in the aforementioned embodiment, the present application can further provide a labeling device for implementing the labeling method, and the labeling device at least includes a labeling machine, an identification sensor, a detection camera and a controller. Among them, the labeling machine is used to label the single-cell pole piece detected to be defective in the pole piece strip; the identification sensor is located after the labeling machine in the direction of the pole piece strip conveying, and is used to detect whether the single-cell pole piece with defects is missing; the detection camera is located before the labeling machine in the direction of the pole piece strip conveying, and is used to detect whether the single-cell pole piece has defects; the controller is used to control the pole piece strip to stop conveying in response to the missing label signal for the target cell pole piece; wherein the target cell pole piece is the pole piece detected in the pole piece strip. Detect a single cell pole piece with defects, where the pole piece strip includes multiple undivided single cell pole pieces; in response to the pole piece strip stopping conveying, determine the number of single cell pole pieces that pass through the labeling position since the pole piece strip slows down and the current cell pole piece corresponding to the labeling position; continue to convey the pole piece strip, and label the next single cell pole piece of the current cell pole piece, so that the next single cell pole piece carries a target number of detection marks to complete the re-labeling of the target cell pole piece; the target number is obtained based on the number of cell pole pieces.

[0152] In some embodiments, the labeling equipment also includes a transmission device for transferring the battery cell electrode from the unwinding reel to the winding reel; a pulse counter is arranged on the transmission device for determining the number of rotations of the transmission device; the controller is also used to obtain the number of rotations of the transmission device that transfers the electrode tape from the time when the electrode tape is decelerated to the time when the electrode tape stops being transferred and the electrode length of a single battery cell electrode; based on the number of rotations and the radius of the transmission device, the length of the electrode tape from the time when the electrode tape is decelerated to the time when the electrode tape stops being transferred is determined; based on the electrode length and the tape length, the number of battery cell electrode sheets is determined.

[0153] In some embodiments, the labeling equipment also includes a pole piece cutting device, wherein the pole piece cutting device is used to cut the battery cell pole pieces in the direction of the pole piece tape conveying to obtain a first pole piece tape and a second pole piece tape; the detection camera includes a first detection camera and a second detection camera, the first detection camera is used to detect the first pole piece tape, and the second detection camera is used to detect the second pole piece tape; the controller is also used to control the pole piece cutting device to cut the battery cell pole pieces in the direction of the pole piece tape conveying to obtain a first pole piece tape and a second pole piece tape; control the first detection camera to detect the first pole piece tape, and control the second detection camera to detect the pole piece tape to obtain the target battery cell pole pieces.

[0154] In some embodiments, the controller is also used to set a target number of detection marks in sequence within a preset range after the positioning hole of the next single cell pole sheet, so that the next single cell pole sheet carries the target number of detection marks, for scrapping the single cell pole sheet carrying the target number of detection marks and the target number of single cell pole sheets after the single cell pole sheet during the winding or stacking process.

[0155] In some embodiments, the controller is further used to detect the identification spacing between two adjacent detection identifications in the next single-cell electrode sheet; in response to the identification spacing not satisfying the joint identification spacing condition, the electrode sheet material strip is controlled to stop being conveyed.

[0156] In some embodiments, the controller is also used to obtain the first rotation number of the transmission device when any detection mark in the next single battery cell electrode passes the detection position and the second rotation number of the next detection mark passing the detection position; based on the first rotation number, the second rotation and the radius of the transmission device, determine the mark spacing between two adjacent detection marks.

[0157] In some embodiments, the controller is also used to detect the next single battery cell electrode to obtain a detection result; the detection result includes at least the number and defects of the detection mark on the next single battery cell electrode; based on the detection result, determine whether to re-mark the next single battery cell electrode.

[0158] In some embodiments, the controller is also used to control the electrode tape to stop conveying in response to the number of detection marks on the next single battery cell electrode sheet being less than the target number; in response to the electrode tape stopping conveying, determine the number of first battery cell electrode sheets passing through the labeling position and the current first battery cell electrode sheet corresponding to the labeling position since the electrode tape stopped conveying; continue to convey the electrode tape and label the next single battery cell electrode sheet of the current first battery cell electrode sheet, so that the next single battery cell electrode sheet carries the first target number of detection marks; the first target number is obtained based on the first battery cell electrode sheet number and the target number.

[0159] In some embodiments, the controller is also used to stop setting a detection mark indicating a defect in the next single-cell pole piece in response to detecting a defect in the next single-cell pole piece, and maintain the target number of detection marks on the next single-cell pole piece.

[0160] The description of the labeling device in the embodiment of the present application is similar to the description of the aforementioned labeling method, and has similar beneficial effects as the labeling method, so it is not repeated here. For technical details not disclosed in the embodiment, please refer to the description of the labeling method of the present application for understanding.

[0161] The following is an explanation of an exemplary application of an embodiment of the present application in a practical application scenario.

[0162] In view of the fact that manual labeling in the related technology may lead to uncontrollable problems, once missed or wrong labeling is done, it may cause quality risks to the battery cell electrodes; the manual rewinding process is uncontrollable, and the battery cell electrodes that have passed the inspection station may have high-risk problems such as wrinkling, decarbonization, and metal leakage; as the production speed becomes faster and faster, the actual operation of manual rewinding and labeling is becoming more and more difficult, and the quality of labeling cannot be controlled. The embodiment of the present application provides a method for automatic labeling of a labeling machine, which solves the long-standing problem of manual labeling and has practical operation and use significance in the industrial field.

[0163] In the embodiment of the present application, the missing label sensor can be used as a trigger signal for automatic labeling. In combination with the die-cutting machine alarm shutdown deceleration process, the pulse encoder counts the distance, thereby judging the pole piece from high-speed movement to complete stop, obtaining the actual distance traveled by the battery cell pole piece, and comparing the production product information (based on the length of each battery cell pole piece, such as 10m), to determine how many batteries have actually been traveled. The actual number of battery cells N that have been traveled is placed in the register of the PLC. When the equipment is restarted, N+1 yellow labels (i.e., detection marks) are forcibly printed at the position of 800±100mm from the Mark hole of the next single battery cell pole piece; in the subsequent winding process, after the winding machine recognizes N+1 yellow labels, it automatically scraps the current battery cell and the next Nth battery cell, completing the replacement of manual labeling.

[0164] The embodiment of the present application may also have yellow label verification logic, which matches the number M of yellow labels printed by the labeling machine with the number m of yellow labels sensed by the missing label sensor to determine whether the labeling machine itself has an error.

[0165] In the embodiments of this application, please continue to refer to Figure 1 The automatic labeling equipment includes hardware such as a detection camera 101, a labeling machine 102, a label sensor 103 (which can be a label missing sensor), a pulse counter 104 (which can be a pulse sensor), an unwinding drum 105, a rewinding drum 106, a smoothing device 107, a transmission device 108, a camera device 109, and a pole piece cutting device 110 (which can be a laser or a cutter). When the automatic labeling equipment is running, the pole piece of the battery cell passes from the unwinding drum 105 through the smoothing roller 107, the active roller 108 and the camera roller 109, and reaches the rewinding drum 106 along the belt-feeding direction.

[0166] Among them, the detection camera 101 is used to determine whether the production material (i.e., the electrode) has defects, including the front and back film areas and the front and back electrode ear areas of the electrode. Here, there can be four detection cameras 101, and each side of the electrode is detected by two detection cameras. After the detection camera 101 collects the electrode image, it is sent to the industrial computer connected to the detection camera 101. The industrial computer identifies whether the image is NG. The industrial computer sends a 0 or 1 signal to the PLC of the automatic labeling equipment to indicate whether the captured image has defects.

[0167] In some embodiments, after receiving the result of determining a defective product, the labeling machine 102 is used to place a label at a position 800±100 mm away from the Mark hole on the defective battery cell electrode to mark the battery cell electrode as defective.

[0168] In some embodiments, the missing label sensor 103 is used to determine whether the labeling is successful and whether the labeling position is reasonable after the labeling machine 102 labels the electrode. Here, the determination of whether the labeling is successful can be based on the distance between the missing label sensor 103 and the labeling machine 102 and the forward speed of the electrode.

[0169] In some embodiments, the unwinding drum 105 and the rewinding drum 106 are used to unwind and rewind the produced materials. The pulse sensor 104 is on the active roller 108, and the active roller 108 is used to prevent the pole piece from slipping, so that the pulse sensor 104 can measure the distance more accurately when detecting how far the pole piece moves forward. The laser 110 is used to cut the pole ear and cut the mark hole of each pole piece.

[0170] based on Figure 1 The structure of the automatic labeling device is shown. Figure 6 This is a flowchart of automatic re-marking after a bad electrode is missing a mark provided by an embodiment of the present application. As shown in the figure, the re-marking logic is implemented through steps S601 to S608:

[0171] Step S601, in response to the missing label of the electrode sheet of the ith single cell in the electrode sheet strip, controlling the electrode sheet strip to decelerate until the electrode sheet strip stops.

[0172] In the embodiment of the present application, when the identification sensor detects that a single-cell electrode piece (EA) with a length of i single-cell electrode pieces has a label falling off, a flying label, or a missing label after being marked by the labeling machine, a PLC alarm will be triggered, causing the labeling equipment to slow down and stop, that is, the electrode piece material strip will slow down until it stops.

[0173] Step S602, in response to the pole piece strip stopping, determining the number of pole pieces of the single cell pole pieces passing through the labeling position during the process of the pole piece strip decelerating to stop and the current pole piece of the cell at the labeling position.

[0174] During the process of the pole piece belt decelerating to a stop, the pole piece length that the pole piece belt passes through during the process of decelerating to a stop can be calculated by the number of rotations of the transmission device and the circumference of the transmission device. According to the pole piece length and the length of the single cell pole piece, the number of pole pieces of the single cell pole piece that the pole piece belt passes through during the process of decelerating to a stop can be obtained. The controller can determine the current cell pole piece at the labeling position based on the labeling machine.

[0175] Step S603: Detect the labeling machine to obtain a first detection result.

[0176] After the labeling equipment stops, the control software corresponding to the labeling equipment will lock the screen, and the engineer can be notified to swipe the card to unlock and re-judge whether there is a problem with the labeling machine itself. The PLC can also receive the signal to perform fool-proof debugging of the labeling machine and obtain the first detection result of the labeling machine, which includes two results: abnormality of the labeling machine and no abnormality.

[0177] Step S604: In response to the first detection result indicating that the labeling machine has no abnormality, the electrode strip is controlled to continue to be conveyed.

[0178] In the embodiment of the present application, if there is no abnormality in the labeling machine, the pole piece material belt is controlled to continue to be conveyed, and the pole piece material belt is continuously tested. If there is no abnormality in the labeling machine, the engineer is notified to perform maintenance, and after there is no abnormality, the pole piece material belt is controlled to continue to be conveyed, and the pole piece material belt is continuously tested.

[0179] Step S605: Calculate the number of supplementary labels for the next cell electrode sheet of the current cell electrode sheet based on the number of electrode sheets, and control the labeling machine to supplement the label on the next cell electrode sheet so that the next cell electrode sheet carries the detection mark of the supplementary label number.

[0180] In an embodiment of the present application, if the number of pole pieces is n, the number of supplementary labels for the next single battery cell pole piece is n+1. At this time, after the pole piece material strip continues to be conveyed, the labeling machine is controlled to supplement the labeling on the next single battery cell pole piece, so that the next single battery cell pole piece carries n+1 detection marks.

[0181] Step S606, detecting whether the detection mark on the next battery cell electrode is missing, and obtaining a second detection result.

[0182] The identification sensor is used to determine whether n+1 detection identifications on the next battery cell electrode are missing, and a second detection result is obtained.

[0183] Step S607 , in response to the second detection result indicating that the detection mark on the next single battery cell electrode sheet is missing, the electrode sheet material strip is controlled to slow down until the electrode sheet material strip stops, and the target battery cell electrode sheet is re-marked.

[0184] If the detection mark on the next battery cell electrode is missed, execute the above plan to determine the number of electrodes passed during the stop process again. For example, another a EA has passed, and the previous count of the PLC is not cleared. N+1+a+1 detection marks can be printed on the next battery cell electrode of the current battery cell when it stops again.

[0185] Step S608, in response to the second detection result indicating that the detection mark on the next single battery cell electrode sheet is not missed, continue to detect the moving electrode sheet material strip and label the defective single battery cell electrode sheet until the electrode sheet material strip enters the winding drum.

[0186] In an embodiment of the present application, if the second inspection result indicates that the inspection mark on the next single battery cell electrode sheet is not missed, the moving electrode sheet strip is continuously inspected and the defective single battery cell electrode sheet is labeled until the electrode sheet strip enters the winding drum.

[0187] based on Figure 1 The structure of the automatic labeling device is shown. Figure 7 The following is a logic flow chart of automatic re-marking after a bad electrode is missing a mark provided by an embodiment of the present application, such as Figure 7 As shown, the supplementary mark logic is implemented through steps S701 to S708:

[0188] Step S701: Detect that the electrode of the i-th single cell is missing a label.

[0189] When the identification sensor detects that the electrode piece (EA) with the length of i single-cell electrode pieces has fallen off, flown away, or missed after being marked by the labeling machine, it will trigger the PLC alarm, causing the automatic labeling equipment to slow down and stop.

[0190] Step S702, controlling the automatic labeling equipment to stop, so that the pole piece material strip slows down until the pole piece material strip stops.

[0191] Step S703, determining the number N of battery cell pole pieces that the pole piece strip passes when it stops.

[0192] During the deceleration process, the value recorded by the pulse sensor can be used to calculate the length of the pole piece that the pole piece strip has traveled during the process of deceleration to stop, and to perform a double check with the Mark signal sent by the main equipment (the machine of the automatic marking equipment) (where the Mark signal is the head of a pole piece of the length of a battery cell, and the main equipment knows how many EAs the pole piece has traveled before it stops), to determine that the pole piece strip has traveled N EAs during the process of deceleration to complete stop.

[0193] In some embodiments, the logic of counting the pole pieces of a single cell during the shutdown process is as follows: first, the sensor is marked with a missing label alarm, the sensor transmits the signal to the PLC, the PLC controls the host to alarm and shut down, and the pulse sensor on the active roller counts a pulses through the rotation of the active roller shaft, the corresponding radius of the shaft is r, and the actual distance traveled is obtained. ; According to the type of battery cell produced, a battery cell length is obtained as L, and the actual number of battery cells passed is .

[0194] Step S704: Test the labeling machine, and after confirming that there is no abnormality in the equipment, restart the machine.

[0195] In some embodiments, after the equipment is shut down, the control software corresponding to the labeling equipment will lock the screen, and the engineer can be notified to swipe the card to unlock and re-judge whether there is a problem with the labeling machine itself. It can also be that the PLC receives the signal and performs anti-fool debugging on the labeling machine. For example, the number of yellow labels M printed by the labeling machine and the yellow label m sensed by the identification sensor are re-judged for anti-fool. Here, the identification sensor starts counting when it senses the yellow label at 800±100mm from the Mark hole. When M=m, it is considered that the labeling machine has no abnormalities and can be used normally. Here, after confirming that the labeling machine and the identification sensor are correct, the equipment is started and restarted.

[0196] Step S705: The labeling machine prints N+1 detection marks on the next cell electrode sheet of the current cell electrode sheet after the electrode sheet material belt stops.

[0197] After the automatic marking device is started, the electrode material strip continues to be conveyed, and N+1 marks are made on the next EA of the current battery cell electrode at a distance of 800±100 mm from the Mark hole, which is used to accurately determine that the actual missing mark position is the i-th EA.

[0198] In the subsequent winding or stacking process, the current winding reel will become the output reel. Therefore, the moving direction of the electrode material during winding is opposite to the moving direction in the die-cutting process. Therefore, the EA where the N+1 mark is located will appear first. Therefore, the N+1th EA after the current EA can be scrapped to ensure that the defective electrode will not be wound into a battery cell, resulting in defective battery cells entering the market.

[0199] In some embodiments, when the labeling machine issues labels, the production tape speed of the electrode material strip can be kept consistent with the labeling speed of the labeling machine based on the speed sensor of the main device, so as to ensure that there are as few dropped and flying labels as possible.

[0200] Step S706: Check whether the detection mark on the next battery cell electrode is missing.

[0201] In some embodiments, the identification sensor determines whether the N+1 yellow labels on the next battery cell pole piece are missing. If not, the PLC Mark hole count is reset to zero and normal production is carried out. When the yellow label sensor identifies N+1 yellow labels during the winding process, the current battery cell pole piece and the Nth battery cell pole piece after the current battery cell pole piece are scrapped, completing the identification and waste removal closed loop.

[0202] If the next battery cell electrode also has missing labels, that is, the number of detection marks on the next battery cell electrode is less than N+1, the shutdown is triggered again, and the electrode material belt has moved another a EA. At this time, the previous count of the PLC is not cleared, and the identification sensor alarms and shuts down. The software locks the screen, and the engineer swipes the card to unlock and repair and confirm the status of the labeling machine. After confirming that the labeling machine is repaired, the equipment starts the labeling machine and can print N+1+a+1 yellow labels on the next battery cell electrode of the current battery cell after it stops again, so as to prevent defective batteries from flowing out and complete the labeling closed loop.

[0203] In some embodiments, the length of a single battery cell electrode may be 10 m, the production speed may be 80 m / min, and the number of single batteries passed by the equipment during shutdown is N=2; when the production speed is 140 m / min, N=4.

[0204] In some embodiments, if a joint label is missed, the device is in a state of just starting up, and the speed is generally less than 20 m / min. At this time, when the device stops again, a=1.

[0205] In some embodiments, step S707 is executed when no mark is missing in the joint tag, and step S702 is executed when no mark is missing.

[0206] Step S707: In the winding process, it is identified that there are N+1 yellow labels on the current battery cell electrode.

[0207] Step S708, scrapping the current battery cell electrode sheet and the N+1th single battery cell electrode sheet thereafter.

[0208] In the winding process, if N+1 yellow labels are recognized by the identification sensor corresponding to the winding process at 800±100mm from the Mark hole, the single-cell electrode with N+1 yellow labels at the current position and the next N+1 single-cell electrode are automatically scrapped, completing the closed loop of bad product detection and bad product discharge.

[0209] In the embodiments of the present application, some foolproof measures are also proposed in special cases, such as:

[0210] If the identification sensor detects a defective cell pole piece during the equipment deceleration process, and the cell pole piece also happens to be missing a mark, the PLC counts as two systems, and counts the missing marks for the target cell pole piece and the defective cell pole piece separately. For example, the missing mark count of cell pole piece A is N, and the missing mark count of cell pole piece B is m. Cell pole piece A is correspondingly stopped for count at N, and cell pole piece B is correspondingly stopped for count at m, thereby completing the joint marking. For example, the first single cell pole piece is defective and needs to be marked, but it is missing a mark. At this time, the equipment stops and decelerates. During the deceleration process, the second single cell pole piece is also detected to be defective but also missing a mark. When the pole piece stops, it stops at the third single cell pole piece. At this time, the equipment is started again, and 4 marks can be made on the fourth single cell pole piece, and then 4 marks are also made on the fifth single cell pole piece, which will scrap the two defective single cell pole pieces.

[0211] If a single-cell electrode that needs to be labeled with N+1 joint labels is also a defective cell, only the defect type and location will be counted, and the yellow label will not be actually printed. Because the single-cell electrode has N+1 labels, it will be scrapped itself, so the corresponding identification sensor does not need to count and the yellow label sensing in the specific area will not be turned on.

[0212] When supplementing the label, multiple yellow labels need to be printed at one time. After the last yellow label is actually printed, it is sensed by the identification sensor, and the PLC records the pulse number N1. After sensing the next yellow label, it records the pulse number N2. N2-N1 is the difference pulse number N between the two adjacent yellow labels, multiplied by the circumference c corresponding to the transmission device. The upper computer can re-judge whether N×c is equal to the actual difference between the two yellow labels, and determine whether the distance between the two adjacent yellow labels meets the joint label spacing. If it meets the requirements, the equipment will operate normally, otherwise it will alarm and shut down. For example, when a single-cell electrode needs to print multiple labels, record whether the distance between the two adjacent labels meets the joint label requirements. For example, the distance between the two labels can be 300±20. If it exceeds the requirements, an alarm and shutdown are required.

[0213] After the pole piece material strip is divided into two by the pole piece cutting device, the inner and outer pole pieces of the battery cell are obtained. The inner and outer pole pieces respectively record their own automatic supplementary marking numbers, and the automatic supplementary marking numbers are stored in the local industrial computer of the die-cutting process; the supplementary marking numbers of the inner and outer pole pieces are bound to the RFID of the pole piece material roll through the PLC, and uploaded to the MES of the die-cutting process for data traceability; the winding material reads the supplementary marking value saved by the RFID. When the actual sensed automatic supplementary marking number is inconsistent with the supplementary marking number bound on the MES, an alarm is issued to stop the machine, and the problems such as dropped marks, flying marks, etc. are corrected.

[0214] The embodiment of the present application can effectively eliminate the actual production problems such as manual omission of labeling, failure to label, uncontrolled labeling position, etc. caused by manual labeling through the above-mentioned automatic labeling logic. It also fundamentally solves the damage to the battery cell pole piece caused by manual labeling rewinding from the winding place, thereby controlling the outflow of defective products in the entire previous process during the die-cutting process, ensuring the product quality of lithium battery cells, and reducing the possibility of defective cells entering the market.

[0215] It should be understood that "one embodiment" or "an embodiment" mentioned throughout the specification means that specific features, structures or characteristics related to the embodiment are included in at least one embodiment of the present application. Therefore, "in one embodiment" or "in an embodiment" appearing throughout the specification does not necessarily refer to the same embodiment. In addition, these specific features, structures or characteristics can be combined in one or more embodiments in any suitable manner. It should be understood that in various embodiments of the present application, the size of the serial number of each step / process mentioned above does not mean the order of execution, and the execution order of each step / process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiment of the present application. The serial numbers of the embodiments of the present application mentioned above are for description only and do not represent the advantages and disadvantages of the embodiments.

[0216] The present application uses descriptions such as "upper", "lower", "top", "bottom", "front", "back", "inside" and "outside" to indicate directions or positional relationships. This is only for the convenience of describing the present application, and does not indicate or imply that the device referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, it should not be understood as limiting the scope of protection of the present application.

[0217] In the description of this application, it should also be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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 directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0218] It should be noted that, in this application, the terms "comprises", "includes" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the existence of other identical elements in the process, method, article or device including the element.

[0219] In the several embodiments provided in the present application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. The device embodiments described above are only schematic. For example, the division of units is only a logical function division. There may be other division methods in actual implementation, such as: multiple units or components can be combined, or can be integrated into another system, or some features can be ignored or not executed. In addition, the coupling, direct coupling, or communication connection between the components shown or discussed can be through some interfaces, and the indirect coupling or communication connection of devices or units can be electrical, mechanical or other forms.

[0220] The units described above as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units; they may be located in one place or distributed on multiple network units; some or all of the units may be selected according to actual needs to achieve the purpose of the scheme of this embodiment. In addition, the functional units in the embodiments of the present application may be all integrated into one processing unit, or each unit may be separately used as a unit, or two or more units may be integrated into one unit; the above integrated units may be implemented in the form of hardware or in the form of hardware plus software functional units.

[0221] The above are only embodiments of the present application and are not intended to limit the protection scope of the present application. Any modifications, equivalent replacements and improvements made within the spirit and scope of the present application are included in the protection scope of the present application.

Claims

1. A method for supplementing a mark, characterized in that: The supplementary standard method comprises: In response to a missing mark signal for a target cell electrode piece, controlling the electrode piece strip to decelerate; wherein the target cell electrode piece is a single cell electrode piece detected to have defects in the electrode piece strip, and the electrode piece strip includes a plurality of undivided single cell electrode pieces; In response to the electrode strip stopping conveying, determining the number of single-cell electrode sheets passing through the labeling position since the electrode strip stopping conveying and the current cell electrode sheet corresponding to the labeling position; Continue to convey the electrode material strip, and label the next single cell electrode sheet of the current cell electrode sheet, so that the next single cell electrode sheet carries a target number of detection marks to complete the labeling of the target cell electrode sheet; the target number is obtained based on the number of cell electrode sheets.

2. The method for supplementing a mark according to claim 1, characterized in that: Determining the number of the battery cell pole pieces includes: Obtaining the number of rotations of the transmission device that transmits the pole piece material strip and the pole piece length of the single cell pole piece from the time when the pole piece material strip is decelerated to the time when the pole piece material strip stops transmitting; Based on the number of rotations and the radius of the transmission device, determining the length of the pole piece strip from the time when the pole piece strip is decelerated to the time when the pole piece strip stops being conveyed; The number of the battery cell pole pieces is determined based on the pole piece length and the material strip length.

3. The method for supplementing a mark according to claim 2, characterized in that: The step of labeling the next single cell electrode piece of the current cell electrode piece so that the next single cell electrode piece carries a target number of detection marks includes: The target number of detection marks are arranged in sequence within a preset range after the positioning hole of the next single-cell pole sheet, so that the next single-cell pole sheet carries the target number of detection marks, so as to scrap the single-cell pole sheet carrying the target number of detection marks and the target number of single-cell pole sheets after the single-cell pole sheet during the winding or stacking process.

4. The method for supplementing a mark according to claim 3, characterized in that: The method for supplementing the mark further comprises: Detecting the mark spacing between two adjacent detection marks in the next single cell electrode sheet; In response to the identification spacing not satisfying the joint identification spacing condition, the pole piece strip is controlled to stop conveying.

5. The method for supplementing a mark according to claim 4, characterized in that: The detecting the distance between two adjacent detection marks in the next single cell electrode piece includes: Obtaining a first rotation number of the transmission device for any detection mark in the next single-cell electrode sheet passing through the detection position and a second rotation number of the next detection mark passing through the detection position; Based on the first rotation number, the second rotation number and the radius of the transmission device, a mark spacing between two adjacent detection marks is determined.

6. The label supplementation method according to any one of claims 1 to 5, characterized in that: The method for supplementing the mark further comprises: Detecting the next single-cell electrode piece to obtain a detection result; the detection result at least includes the number and defects of the detection marks on the next single-cell electrode piece; Based on the detection result, determine whether to perform re-marking on the next single cell electrode sheet.

7. The method for supplementing a mark according to claim 6, characterized in that: The determining whether to perform re-marking on the next single cell electrode sheet based on the detection result includes: In response to the number of detection marks on the next single-cell electrode sheet being less than the target number, controlling the electrode sheet material strip to stop conveying; In response to the electrode strip stopping conveying, determining the number of first cell electrode strips passing through the labeling position since the electrode strip stopping conveying and the current first cell electrode strip corresponding to the labeling position; Continue to convey the electrode material strip, and label the next single battery cell electrode sheet of the current first battery cell electrode sheet, so that the next single battery cell electrode sheet carries a first target number of detection marks; the first target number is obtained based on the first battery cell electrode sheet number and the target number.

8. The method for supplementing a mark according to claim 6, characterized in that: The determining whether to perform re-marking on the next single cell electrode sheet based on the detection result includes: In response to detecting that the next single-cell pole piece has a defect, stopping setting a detection mark indicating that the next single-cell pole piece has a defect on the next single-cell pole piece, and maintaining the target number of detection marks on the next single-cell pole piece.

9. A labeling device, characterized in that: The labeling equipment comprises: A labeling machine is used to label the single-cell pole pieces that are found to have defects in the pole piece strip; An identification sensor, located after the labeling machine in the direction of transmission of the electrode strip, is used to detect whether a defective single-cell electrode is missing a label; An inspection camera, located in the direction of transmission of the electrode strip and before the labeling machine, is used to inspect whether a single cell electrode has defects; A controller, for controlling a pole piece tape to stop conveying in response to a missing label signal for a target battery cell pole piece; wherein the target battery cell pole piece is a single battery cell pole piece detected to be defective in the pole piece tape, and the pole piece tape comprises a plurality of undivided single battery cell pole pieces; in response to the pole piece tape stopping conveying, determining the number of single battery cell pole pieces passing through a labeling position since the pole piece tape decelerated and a current battery cell pole piece corresponding to the labeling position; continuing to convey the pole piece tape, and labeling a single battery cell pole piece next to the current battery cell pole piece, so that the next single battery cell pole piece carries a target number of detection marks to complete the re-labeling of the target battery cell pole piece; the target number is obtained based on the number of battery cell pole pieces.

10. The labeling device according to claim 9, characterized in that: The labeling device also includes: A transmission device, used to transfer the battery cell pole piece from the unwinding drum to the winding drum; a pulse counter, disposed on the transmission device, for determining the number of rotations of the transmission device; The controller is also used to obtain the number of rotations of the transmission device that transmits the pole piece tape and the pole piece length of the single battery cell pole piece from the time when the pole piece tape decelerates to the time when the pole piece tape stops transmitting; based on the number of rotations and the radius of the transmission device, determine the length of the pole piece tape from the time when the pole piece tape decelerates to the time when the pole piece tape stops transmitting; based on the pole piece length and the tape length, determine the number of battery cell pole pieces.

11. The labeling device according to claim 9, characterized in that: The controller is also used to obtain the first identification number of the detection identification issued by the labeling machine and the second identification number of the detection identification recognized by the identification sensor in response to the pole piece material strip stopping transmission; compare the first identification number with the second identification number to obtain a comparison result; and continue to convey the pole piece material strip in response to the comparison result satisfying the comparison condition.

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