Winding device, vacuum coating system, and battery manufacturing production line

Abstract

The present application relates to a winding device, a vacuum coating system, and a battery manufacturing production line. A second winding assembly unwinds to a first winding assembly a coated substrate under detection; and when said coated substrate is rewound, by means of a mark detector, abnormality mark information of an abnormality location of said coated substrate can be detected and sent to a controller. The controller receives the abnormality mark information, so as to achieve the rewinding verification of said coated substrate.

Description

Winding device, vacuum coating system and battery manufacturing production line

[0001] Cross-references

[0002] This application refers to Chinese patent application No. 202322008682.8 filed on July 28, 2023, entitled “Winding device, vacuum coating system and battery manufacturing production line”, which is incorporated into this application in its entirety by reference. Technical Field

[0003] The present application relates to the field of process technology, and in particular to a winding device, a vacuum coating system and a battery manufacturing production line. Background Art

[0004] Vacuum coating involves heating a metal or non-metallic material under high vacuum conditions, causing it to evaporate and condense onto the substrate surface, thereby forming a thin film. Vacuum coating is widely used in various processing technologies, including lithium batteries, due to its wide range of film and substrate materials, the ability to produce films with high density, high purity, and uniform coatings, as well as excellent bonding strength and film durability.

[0005] However, in the related art, the coated substrate is often verified manually during the rewinding process, and the accuracy of the rewinding verification is low.

[0006] Application Contents

[0007] Based on this, it is necessary to provide a winding device, a vacuum coating system and a battery manufacturing production line to improve the accuracy of rewinding verification.

[0008] A winding device includes: a first winding assembly, a second winding assembly, a mark detector and a controller, wherein the controller is electrically connected to the mark detector; the first winding assembly is used to unwind a coated substrate to be tested, and to rewind the coated substrate to be tested unwound by the second winding assembly after unwinding is completed; the second winding assembly is used to rewind the coated substrate to be tested unwound by the first winding assembly, and to unwind the coated substrate to be tested after rewinding is completed; the mark detector is used to detect abnormal mark information of the coated substrate to be tested during the process of the first winding assembly rewinding the coated substrate to be tested.

[0009] In the aforementioned winding device, when the second winding assembly unwinds the coated substrate to be tested onto the first winding assembly, rewinding the coated substrate to be tested, a mark detector can detect abnormal marking information indicating abnormal positions on the coated substrate to be tested and transmit it to a controller. The controller receives this abnormal marking information and verifies the rewinding of the coated substrate to be tested. This solution, which verifies the rewinding of the coated substrate to be tested by detecting abnormal marking information with a mark detector, offers higher rewinding verification accuracy than manual verification methods.

[0010] In some embodiments, the abnormal mark information includes color information, and the mark detector includes a mark color detector.

[0011] In the above scheme, the abnormal marking information includes color information, that is, the abnormal position of the coated substrate to be tested is marked by color marking. During the rewinding verification process, the abnormal marking information can be obtained by simply detecting the color information through a marking color detector, which has the advantages of simple detection method and high detection efficiency.

[0012] In some embodiments, the winding device further comprises a placement bracket, and the mark detector is mounted on the placement bracket.

[0013] In the above scheme, a placement bracket is set at the first winding assembly, and the mark detector is further set on the placement bracket, so that the mark detector is placed on one side of the first winding assembly for mark detection, which is not affected by the unwinding of the first winding assembly, thereby improving the detection reliability of the mark detector.

[0014] In some embodiments, the first winding assembly includes an unwinding roller, and the mark detector is arranged along the axial direction of the unwinding roller.

[0015] In the above solution, the mark detector is arranged along the axial direction of the unwinding roller, so as to accurately identify different position points of the coated substrate to be tested and improve the accuracy of abnormal mark detection.

[0016] In some embodiments, the winding device further includes a flattening assembly, which is disposed between the first winding assembly and the second winding assembly and is used to flatten the coated substrate to be tested.

[0017] In the above scheme, the winding device is further provided with a flattening component between the first winding component and the second winding component. The flattening component can flatten the coated substrate to be tested during the winding and unwinding process, so that the tension of the coated substrate to be tested is uniform, thereby improving the coating reliability.

[0018] In some embodiments, the flattening assembly includes a flattening roller and a driver drivingly connected to the flattening roller, and the driver is electrically connected to the controller.

[0019] The above solution realizes the flattening control of the coating substrate to be tested by connecting the flattening roller via a driver transmission and utilizing the driver to drive the flattening roller, and has high flattening reliability.

[0020] In some embodiments, the flattening assembly further includes a frequency converter electrically connected between the controller and the driver.

[0021] In the above solution, the flattening assembly further includes a frequency converter, which can realize variable frequency operation control of the flattening roller, thereby further improving the flattening reliability of the flattening assembly.

[0022] In some embodiments, the winding device further includes an auxiliary roller assembly, wherein the auxiliary roller assembly is disposed between the second winding assembly and the first winding assembly.

[0023] In the above solution, an auxiliary roller assembly is further provided between the second winding assembly and the first winding assembly. The auxiliary roller assembly can further flatten the coated substrate to be tested during the winding and unwinding process, thereby reducing the risk of the coated substrate to be tested becoming wrinkled or broken.

[0024] An embodiment of the present application also provides a vacuum coating system, including a vacuum coating component and the above-mentioned winding device.

[0025] An embodiment of the present application also provides a battery manufacturing production line, including the above-mentioned vacuum coating system.

[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] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments of the present application. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on the drawings without inventive work. In the drawings:

[0028] FIG1 is a schematic structural diagram of a winding device in some embodiments of the present application;

[0029] FIG2 is a schematic structural diagram of a winding device in some other embodiments of the present application;

[0030] FIG3 is a schematic structural diagram of a winding device in some other embodiments of the present application;

[0031] FIG4 is a schematic diagram of the flattening assembly structure in some embodiments of the present application;

[0032] FIG5 is a schematic diagram of the flattening assembly structure in some other embodiments of the present application;

[0033] FIG6 is a schematic structural diagram of a winding device in some further embodiments of the present application.

[0034] The accompanying drawings in the specific implementation manner are as follows:

[0035] 11-second winding assembly, 12-first winding assembly, 13-marking detector, 14-controller, 15-placing bracket, 16-flattening assembly, 161-flattening roller, 162-drive, 163-frequency converter, 17-auxiliary roller assembly, 171-main drum, 172-auxiliary roller. DETAILED DESCRIPTION

[0036] The following embodiments of the technical solution of the present application will be described in detail with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application and are therefore only examples and are not intended to limit the scope of protection of the present application.

[0037] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned figure descriptions are intended to cover non-exclusive inclusions.

[0038] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0039] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0040] Currently, market developments indicate that power batteries are becoming increasingly widely used. They are not only used in energy storage systems such as hydropower, thermal, wind, and solar power plants, but are also widely used in electric vehicles like electric bicycles, electric motorcycles, and electric vehicles, as well as in military equipment and aerospace. As power battery applications continue to expand, market demand is also growing.

[0041] During the production of power batteries, coating is a key process for improving their performance and stability. Vacuum coating is widely used in power batteries, for example, in the preparation of negative electrode coatings for power batteries. The coating assembly of a vacuum coating system often operates in conjunction with a winding system, which winds and unwinds the substrate to be coated. During this process, the vacuum coating assembly coats the substrate to be coated, producing a coated substrate.

[0042] During the coating process, any defects in the coated substrate (such as substrate damage, wrinkles, or coating failure) will be marked as abnormal. During the subsequent rewinding process, the coated substrate needs to be verified by detecting this mark. The current verification method is based on visual observation by staff. During the verification process, it is easy to cause verification errors due to human error, resulting in low rewinding verification accuracy.

[0043] In order to alleviate the problem of low rewinding verification accuracy during the rewinding verification of the above-mentioned coated substrate, the technical solution of the present application is provided with a mark detector on one side of the first winding component. The mark detector is connected to the controller. The mark detector detects abnormal mark information of the coated substrate during the unwinding process in real time and sends it to the controller to realize automatic rewinding verification without the need for human participation. It can not only improve the accuracy of rewinding verification, but also effectively save human resources.

[0044] The winding device provided in the embodiments of the present application is used in a vacuum coating system, which includes a vacuum coating assembly and a winding device. The vacuum coating assembly is used to coat a substrate to be coated, while the winding device is used to control the winding of the coated substrate obtained by coating. The first winding assembly transports the substrate to be coated to the vacuum coating assembly for coating, and the second winding assembly winds up and collects the coated substrate to achieve the coating function.

[0045] It is understood that the winding device of the embodiment of the present application can not only be used in the power battery processing technology to control the winding of the coating substrate in the power battery, but can also be used in other processing technologies to coat other types of substrates, such as optical thin films, architectural glass, etc., without specific limitation. To facilitate understanding of the technical solution of the present application, the following can be understood as the winding device being applied in the processing technology of power batteries.

[0046] Please refer to Figure 1. The present application provides a winding device, including: a second winding component 11, a first winding component 12, a mark detector 13 and a controller 14. The controller 14 is electrically connected to the mark detector 13. The first winding component 12 is used to unwind the coated substrate to be tested, and to rewind the coated substrate to be tested unwound by the second winding component 11 after unwinding is completed; the second winding component 11 is used to rewind the coated substrate to be tested unwound by the first winding component 12, and to unwind the coated substrate to be tested after rewinding is completed. The mark detector 13 is used to detect abnormal mark information of the coated substrate to be tested during the process of the first winding component 12 rewinding the coated substrate to be tested.

[0047] In some embodiments, the second winding assembly 11 is a moving assembly that rewinds and stores the coated substrate to be tested, and releases the rewound coated substrate to be tested for rewinding. For example, it can be a winding assembly. The first winding assembly 12 is a moving assembly that unwinds the coated substrate to be tested for coating, and rewinds the coated substrate to be tested when it is released by the second winding assembly 11. For example, it can be an unwinding assembly. The mark detector 13 is a detection device that detects abnormal mark information on the coated substrate to be tested released by the first winding assembly 12. The coated substrate to be tested is a substrate that has been coated by the vacuum coating assembly and is awaiting rewinding verification. The abnormal mark information is the information obtained after the abnormal position point is marked when the coated substrate to be tested is in an abnormal state.

[0048] After the vacuum coating system starts vacuum coating, the coating assembly equipped with the winding device will coat the substrate to be coated after it is transported to the coating position, obtaining the coated substrate. The coated substrate is further transported by the winding device and finally wound up. During the coating process, if the substrate to be coated has an abnormal state (such as wrinkles or damage), the vacuum coating assembly will detect it and mark the abnormal position, obtaining abnormal marking information.

[0049] After the entire substrate to be coated is coated and the coated substrate is obtained, it needs to be rewound and verified before it is put into actual use. After rewind verification, the coated substrates that do not have any abnormal marks can be used in the subsequent process. However, the coated substrates with abnormal marks need to be further processed to eliminate the defects before being put into the subsequent process or directly discarded. The specific selection can be based on actual needs.

[0050] During the rewinding process, the coated substrate to be rewound and verified is stored in the second winding assembly 11. After the second winding assembly 11 is unwound, the coated substrate to be tested is stretched and flattened, and then rewound in the first winding assembly 12, thus achieving rewinding. At this time, a mark detector 13, located on one side of the first winding assembly 12, detects in real time whether the rewound coated substrate contains any abnormal mark information. If abnormal mark information is detected, the position of the abnormal mark is transmitted to the controller 14. Upon receiving the information, the controller 14 determines that the current roll of the coated substrate to be tested has defects. If the controller 14 does not receive any abnormal mark position information during the entire rewinding process, the current roll of the coated substrate to be tested is deemed to be free of defects.

[0051] It should be pointed out that in some embodiments, the controller 14 is also electrically connected to the second winding assembly 11 and the first winding assembly 12, respectively. When winding and unwinding operations are required, the controller 14 will send corresponding control instructions to the first winding assembly 12 and the second winding assembly 11, respectively, so that the second winding assembly 11 releases the coated substrate to be tested and rewinds it through the first winding assembly 12, thereby realizing the rewinding of the coated substrate to be tested.

[0052] It is understandable that the specific type of the controller 14 is not unique. In some embodiments, the controller 14 can be an MCU (Microcontroller Unit), a PLC (Programmable Logic Controller) or a single-chip microcomputer, etc., without specific limitation.

[0053] In the aforementioned winding device, when the second winding assembly 11 unwinds the coated substrate to be tested toward the first winding assembly 12, rewinding the coated substrate to be tested, the mark detector 13 can detect abnormal marking information indicating abnormal positions on the coated substrate to be tested and transmit it to the controller 14. The controller 14 receives this abnormal marking information and verifies the rewinding of the coated substrate to be tested. This solution, which verifies the rewinding of the coated substrate to be tested by detecting abnormal marking information through the mark detector 13, achieves higher rewinding verification accuracy than manual verification methods.

[0054] At the same time, the winding device does not require human intervention when performing rewinding verification, and can effectively save human resources.

[0055] In some embodiments, the abnormal mark information includes color information, and the mark detector 13 includes a mark color detector.

[0056] Color information is information that characterizes color categories; a marker color detector is a device that can identify different marker colors. The marker color detector is not limited to a single type and can be a color sensor, etc. This embodiment employs color marking and recognition to identify abnormal locations on the coated substrate under test. Upon receiving the color information collected and transmitted by the marker color detector, the controller 14 determines that the coated substrate under test has a defect.

[0057] It should be noted that the type of color information is not unique. In some embodiments, all locations where defects are detected during vacuum coating can be marked with the same color. Subsequently, simply detecting that color will indicate that the coated substrate is defective. For example, the defect location can be marked in yellow.

[0058] In other embodiments, different colors may be used to mark different defect locations or different defect types, as long as they can be distinguished from the color of the coated substrate to be tested. During the rewinding process, the mark color detector can identify these colors that are different from the color of the coated substrate to be tested and send the corresponding abnormal mark information to the controller 14.

[0059] It is understood that in other embodiments, the locations of defects on the coated substrate to be tested may be marked using other methods, which are not particularly limited. For example, abnormal locations may be marked by affixing labels. Correspondingly, the abnormal marking information includes label information. The controller 14 can also perform rewind verification of the coated substrate to be tested based on the received label information.

[0060] In the above scheme, the abnormal marking information includes color information, that is, the abnormal position of the coated substrate to be tested is marked by color marking. During the rewinding verification process, the abnormal marking information can be obtained by simply detecting the color information through a marking color detector, which has the advantages of simple detection method and high detection efficiency.

[0061] It is understood that in some embodiments, the mark detector 13 may be directly attached to a side of the first winding assembly 12. In other embodiments, the mark detector 13 may be placed on a side of the first winding assembly 12 and spaced apart from the first winding assembly 12. Taking the spaced-apart arrangement of the mark detector 13 and the first winding assembly 12 as an example, in some embodiments, as shown in FIG2 , the winding device further includes a placement bracket 15, to which the mark detector 13 is mounted. The placement bracket 15 is a bracket used to securely place the mark detector 13, and its type is not limited to a single type; any type can be used as long as it can position the mark detector 13 at a certain height on a side of the first winding assembly 12.

[0062] In some embodiments, the placement bracket 15 is a height-adjustable bracket. Through this type of placement bracket 15, the detection height of the mark detector 13 can be adjusted according to actual conditions. The detection height of the mark detector 13 is more matched with the first winding component 12, further improving the mark detection accuracy.

[0063] In the above solution, the mark detector 13 is set on the placement bracket 15, so that the mark detector 13 is placed on one side of the first winding component 12 for mark detection, which is not affected by the unwinding of the first winding component 12, thereby improving the detection reliability of the mark detector 13.

[0064] In some embodiments, the first winding assembly 12 includes an unwinding roller, and the mark detector 13 is arranged along the axial direction of the unwinding roller.

[0065] The unwinding roller is used to release the stored coated substrate. In the technical solution of this embodiment, the unwinding roller can also rewind the coated substrate to be tested that has been wound up and stored by the second winding assembly 11, thus achieving a rewinding function. During the rewinding process, the coated substrate to be tested is flattened along the unwinding roller. By arranging the mark detector 13 along the axial direction of the unwinding roller, it is possible to monitor various positions of the coated substrate to be tested.

[0066] In the above solution, the mark detector 13 is arranged along the axial direction of the unwinding roller, so as to accurately identify different position points of the coating substrate to be tested and improve the accuracy of abnormal mark detection.

[0067] Please refer to FIG. 3 . In some embodiments, the winding device further includes a flattening assembly 16 . The flattening assembly 16 is disposed between the first winding assembly 12 and the second winding assembly 11 and is used to flatten the coated substrate to be tested.

[0068] The flattening assembly 16 is the component that flattens the coated substrate to be tested. During the winding and unwinding process, the substrate to be coated or already coated may wrinkle due to unbalanced force, and in severe cases, even break. To alleviate this phenomenon, a flattening assembly 16 is provided between the second winding assembly 11 and the first winding assembly 12. During the winding process, when the substrate is transferred to the flattening assembly 16, it is flattened by the flattening assembly 16 to balance the tension of the substrate during the winding process and reduce the risk of wrinkles and breaks.

[0069] In the above scheme, the winding device is further provided with a flattening component 16 between the second winding component 11 and the second winding component 11. The flattening component 16 can flatten the coated substrate to be tested during the winding and unwinding process, so that the tension of the coated substrate to be tested is uniform, thereby improving the coating reliability.

[0070] Please refer to FIG. 4 . In some embodiments, the flattening assembly 16 includes a flattening roller 161 and a driver 162 that is transmission-connected to the flattening roller 161 . The driver 162 is electrically connected to the controller 14 .

[0071] Flattening roller 161, also known as a bending roller, consists of a high-quality, thick-walled hollow rubber roller, a bending iron core, a bracket, and a lever adjuster. It adjusts tension, flattens the substrate, and eliminates wrinkles and creases. During operation, driver 162 feeds real-time operating parameters back to controller 14. Driver 162 then receives control signals based on these parameters and drives flattening roller 161 to rotate, thereby achieving the flattening function.

[0072] The above solution realizes the flattening control of the coating substrate to be tested by connecting the flattening roller 161 via the driver 162 and driving the flattening roller 161 with the driver 162, and has high flattening reliability.

[0073] In some embodiments, referring to FIG. 5 , the flattening assembly 16 further includes a frequency converter 163 , which is electrically connected between the controller 14 and the driver 162 .

[0074] In actual use, to further improve the flattening performance of the flattening roller 161, a frequency converter 163 is provided between the controller 14 and the driver 162. The frequency converter 163 provides variable frequency drive to achieve flattening control. In this case, the controller 14 can be considered the master station, and the frequency converter 163 can be considered the slave station, for driving and controlling the flattening roller 161.

[0075] In the above solution, the flattening assembly 16 further includes a frequency converter 163 , through which the frequency converter 163 can realize frequency conversion operation control of the flattening roller 161 , thereby further improving the flattening reliability of the flattening assembly 16 .

[0076] It should be noted that the number of flattening rollers 161, inverters 163, and drivers 162 provided in the winding device is not unique. Based on actual needs, one or more flattening rollers 161 can be provided in the winding device, with each flattening roller 161 driven by a corresponding driver 162. In other words, the number of flattening rollers 161 and the number of drivers 162 are the same. The drivers 162 can be directly connected to the controller 14 or connected to the controller 14 via the inverters 163. In other words, the number of inverters 163 in the flattening assembly 16 can be the same as the number of flattening rollers 161 or less than the number of flattening rollers 161, depending on actual needs.

[0077] In some embodiments, the winding device is provided with a plurality of flattening rollers 161, each flattening roller 161 is connected to a corresponding driver 162, each driver 162 is connected to a corresponding frequency converter 163, and each driver 162 and frequency converter 163 are respectively connected to the controller 14. That is, in this embodiment, each flattening roller 161 is driven and controlled by the frequency converter 163 and the driver 162.

[0078] Research has revealed that during actual operation of the winding device, as the coil diameter of the coated substrate continuously changes, the current of inverter 163 also continuously changes, and the corresponding torque of inverter 163 also changes. Therefore, through multiple experimental analyses, a corresponding relationship between inverter 163 current and inverter 163 torque can be established and stored in controller 14 for subsequent flattening control.

[0079] It can be understood that the correspondence between the inverter 163 current and the inverter 163 torque can be stored in the form of a database, graph, table, etc., or a functional relationship between the inverter 163 current and the inverter 163 torque can be established through linear fitting, etc., and stored in the form of a functional relationship, without specific limitation.

[0080] Taking a flattening roller 161, a driver 162, and a frequency converter 163 as an example, for this component set, when performing flattening control, the controller 14 first receives the current and current torque feedback from the driver 162 or frequency converter 163. Based on the current, the controller 14 matches the corresponding relationship between the frequency converter 163 current and the frequency converter 163 torque to obtain the actual required torque. The controller 14 then calculates the difference between the actual required torque and the current torque, compensates this torque difference in the frequency converter 163 through frequency conversion control, and finally outputs a corresponding control signal to the driver 162, which drives the flattening roller 161 to rotate, achieving flattening compensation control.

[0081] It should be noted that the specific type of the driver 162 is not unique. In some embodiments, the driver 162 includes a motor. During the actual flattening control process, the motor receives the control signal output by the inverter 163 to drive the flattening roller 161 to rotate, thereby realizing the flattening function.

[0082] It is understood that the connection method between the inverter 163 and the controller 14 is not limited to a single method. The controller 14 and each inverter 163 can be connected via wired or wireless communication, as long as rapid information exchange between the two can be achieved. For example, in some embodiments, the inverter 163 and the controller 14 are connected via an Ethernet-based control and communication link system.

[0083] The Ethernet-based Control Communication Link (CC-LINK), also known as CC-LINK IE, is an open fieldbus with large data capacity and a variety of selectable communication speeds. It is a complex, open, and adaptable network system that can adapt to a wide range of networks, from higher management layers to lower sensor layers. It is understood that in other embodiments, the inverter 163 and the controller 14 may communicate via other methods, depending on actual needs.

[0084] In the above solution, the inverter 163 and the controller 14 are connected to each other through an Ethernet-based control and communication link system, which can achieve ultra-high-speed and ultra-large-capacity field network communication and improve the interaction efficiency between the inverter 163 and the controller 14.

[0085] In some embodiments, the second winding assembly 11 includes a winding roller and a winding drive, and the winding drive is connected to the controller 14 and the winding roller respectively.

[0086] The take-up roller is used to take up and store the coated substrate. The take-up drive is the device that drives the take-up roller to rotate and store the coated substrate. The take-up drive is connected to the controller 14. Under the control of the controller 14, the driver 162 drives the take-up roller to rotate or stop rotation, realizing the take-up function.

[0087] In the above solution, the second winding assembly 11 includes a winding roller and a winding drive. The winding drive is controlled by the controller 14, and the winding drive drives the winding roller to move to achieve winding control, which has high winding drive reliability.

[0088] In some embodiments, the first winding assembly 12 includes an unwinding roller and an unwinding drive, and the unwinding drive is connected to the controller 14 and the unwinding roller, respectively.

[0089] The unwinding roller is used to release the stored coated substrate. The unwinding driver is the device that drives the unwinding roller to rotate, releasing the coated substrate for rewinding (i.e., rewinding). The unwinding driver is connected to the controller 14. Under the control of the controller 14, the driver 162 drives the unwinding roller to rotate or stop rotating, realizing the unwinding function.

[0090] In the above solution, the first winding assembly 12 includes an unwinding roller and an unwinding drive. The unwinding drive is controlled by the controller 14, and the unwinding drive drives the unwinding roller to move, thereby realizing unwinding control and having high unwinding drive reliability.

[0091] Please refer to FIG. 6 . In some embodiments, the winding device further includes an auxiliary roller assembly 17 . The auxiliary roller assembly 17 is disposed between the second winding assembly 11 and the first winding assembly 12 .

[0092] The auxiliary roller assembly 17 is a device for assisting in winding and unwinding. The auxiliary roller assembly 17 includes an auxiliary roller 172, a main drum 171 and its corresponding auxiliary driver. The auxiliary driver is connected to the controller 14 and drives the auxiliary roller 172 and the main drum 171 to operate under the control of the controller 14 to realize the winding and unwinding functions.

[0093] It should be pointed out that the arrangement positions of the auxiliary roller 172 and the main drum 171 in the winding device are not unique. In some embodiments, between the first winding assembly 12 and the second winding assembly 11, there are arranged in sequence the first auxiliary roller, the first flattening roller, the second auxiliary roller, the third auxiliary roller, the second flattening roller, the first main drum, the third flattening roller, the fourth flattening roller, the fourth auxiliary roller, the fifth flattening roller, the sixth flattening roller, the second main drum, the seventh flattening roller, the fifth auxiliary roller, the sixth auxiliary roller, the eighth flattening roller and the seventh auxiliary roller.

[0094] In the above solution, an auxiliary roller assembly 17 is further provided between the second winding assembly 11 and the first winding assembly 12. The auxiliary roller assembly 17 can further flatten the coated substrate to be tested during the winding and unwinding process, thereby reducing the risk of the coated substrate to be tested becoming wrinkled or broken.

[0095] In order to facilitate understanding of the technical solution of the present application, the present application is explained below in conjunction with more detailed embodiments.

[0096] During the coating stage, under the action of the controller 14, the first winding assembly 12 unwinds the substrate to be coated and transfers it to the vacuum coating assembly for coating, obtaining the coated substrate, which is then reeled up and stored by the second winding assembly 11. During this process, the controller 14 receives the inverter 163 current and current torque of the flattening assembly 16 in real time, and matches the inverter 163 current with the pre-stored correspondence between the inverter 163 current and the inverter 163 torque according to the inverter 163 current to obtain the actual required torque. The controller 14 makes a difference between the actual required torque and the current torque, and compensates the torque difference in the inverter 163 through frequency conversion control. The control signal output by the inverter 163 adjusts the motor operation of the flattening assembly 16 to alleviate the phenomenon of wrinkles or breaks in the coating process. In addition, during the coating process, if a defect is detected in the coating substrate, the defect position will be marked in yellow.

[0097] After the coating is completed, the second winding assembly 11 of the coating stage is unwound, and the first winding assembly 12 is rewound, and the rewound and stored coated substrate is released for verification, that is, rewinding verification is performed. During the rewinding process, in order to alleviate the phenomenon of wrinkles or breaks in the coated substrate, the controller 14 needs to obtain the current and current torque of the inverter 163 of the flattening assembly 16, and perform compensation adjustments in real time. The details will not be repeated here. During the rewinding process, the mark color detector arranged on one side of the first winding assembly 12 can detect in real time whether there is a yellow marked position on the coated substrate. If so, the color information of the yellow mark is sent to the controller 14 to achieve rewinding verification.

[0098] An embodiment of the present application also provides a vacuum coating system, including a vacuum coating component and the above-mentioned winding device.

[0099] The winding device is as shown in the above embodiment and the accompanying drawings, and will not be described in detail here. The vacuum coating system is used for coating the substrate to be coated when the winding device rewinds and unwinds the substrate to be coated. In the above vacuum coating system, the second winding component 11 unwinds the coated substrate to be tested to the first winding component 12, and when the coated substrate to be tested is rewound, the abnormal mark information of the abnormal position of the coated substrate to be tested can be detected by the mark detector 13 and sent to the controller 14. The controller 14 receives the abnormal mark information and can realize the rewinding verification of the coated substrate to be tested. This solution realizes the rewinding verification of the coated substrate to be tested by detecting the abnormal mark information by the mark detector 13, which has higher rewinding verification accuracy than the manual verification method.

[0100] Furthermore, the present application also provides a battery manufacturing production line, including the above-mentioned vacuum coating system.

[0101] As shown in the above embodiment, the vacuum coating system realizes the vacuum coating process of power batteries through the battery manufacturing production line of the embodiment of the present application. In this solution, the first winding assembly 12 unwinds the coating substrate to be tested to the second winding assembly 11, and when the coating substrate to be tested is rewound, the mark detector 13 can detect the abnormal mark information of the abnormal position of the coating substrate to be tested and send it to the controller 14. The controller 14 receives the abnormal mark information and can realize the rewinding verification of the coating substrate to be tested. The rewinding verification of the coating substrate to be tested is realized by detecting the abnormal mark information by the mark detector 13, which has higher rewinding verification accuracy than the manual verification method.

[0102] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A winding device, comprising: a first winding assembly and a second winding assembly, wherein the first winding assembly is used to unwind the coated substrate to be tested and to rewind the coated substrate to be tested unwound by the second winding assembly after unwinding is completed; The second winding assembly is used to wind up the coated substrate to be tested unwound by the first winding assembly, and unwound the coated substrate to be tested after winding up; A mark detector, used for detecting abnormal mark information of the coated substrate to be tested during the process of the first winding assembly winding up the coated substrate to be tested; wherein the abnormal mark information includes color information, and the mark detector includes a mark color detector; A controller is electrically connected to the mark detector.

2. The winding device according to claim 1, wherein: The winding device also includes a placement bracket, and the mark detector is assembled on the placement bracket.

3. The winding device according to claim 2, wherein: The placement bracket is a height-adjustable bracket.

4. The winding device according to any one of claims 1 to 3, wherein: The first winding assembly includes an unwinding roller, and the mark detector is arranged along the axial direction of the unwinding roller.

5. The winding device according to any one of claims 1 to 4, wherein: The winding device further comprises a flattening assembly, which is disposed between the first winding assembly and the second winding assembly and is used for flattening the coated substrate to be tested.

6. The winding device according to claim 5, wherein: The flattening assembly includes a flattening roller and a driver drivingly connected to the flattening roller, and the driver is electrically connected to the controller.

7. The winding device according to claim 6, wherein: The flattening assembly further includes a frequency converter electrically connected between the controller and the driver.

8. The winding device according to claim 7, wherein: The frequency converter and the controller are connected via an Ethernet-based control and communication link system.

9. The winding device according to any one of claims 1 to 8, wherein: The winding device further includes an auxiliary roller assembly, and the auxiliary roller assembly is arranged between the second winding assembly and the first winding assembly.

10. A vacuum coating system, comprising a vacuum coating component and the winding device according to any one of claims 1 to 9.

11. A battery manufacturing production line, comprising the vacuum coating system according to claim 10.

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