Film roll conveying device, control method thereof, electronic device, and storage medium

Abstract

The application provides a film roll conveying device and a control method thereof, an electronic device and a storage medium. The film roll conveying device comprises a tension adjusting mechanism and a tension sensor. A tension adjusting roller is used to abut against the surface of the film roll. The output end of a servo motor is rigidly connected with the tension adjusting roller, and is used to drive the tension adjusting roller to move so as to adjust the tension of the film roll. The tension sensor is used to detect the tension value when the film roll is conveyed. Faster response speed is achieved, the precision of tension adjustment is improved, the adjustment range is increased, and the coating quality and production efficiency of the battery pole piece are improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of batteries, and in particular to a film roll conveying device, a control method thereof, an electronic device, and a computer readable storage medium. BACKGROUND

[0002] Energy saving and emission reduction is the key to the sustainable development of the automobile industry. Electric vehicles have become an important part of the sustainable development of the automobile industry due to their energy saving and environmental protection advantages. For electric vehicles, battery technology is an important factor for their development.

[0003] The electrode sheet is the basis of the power battery, which directly determines the electrochemical performance and safety of the battery. The electrode sheet is composed of a current collector and a uniform coating applied on the current collector. The current electrode sheet preparation adopts an electrode coating process of uniformly coating the uniformly stirred slurry on the foil (i.e. the current collector) and drying the organic solvent in the slurry. The electrode sheet can be conveyed in the form of a roll during preparation. In order to ensure uniform coating and thus ensure the quality of the battery electrode sheet, the film roll tension needs to be kept stable during conveying. SUMMARY

[0004] The present application aims to at least solve one of the technical problems existing in the prior art. To this end, one object of the present application is to provide a film roll conveying and placing method, an electronic device, and a storage medium to improve the instability of the tension of the film roll during conveying, thereby affecting the production efficiency and the quality of the battery.

[0005] An embodiment of the first aspect of the present application provides a film roll conveying device, which comprises a tension adjusting mechanism and a tension sensor. The tension adjusting mechanism comprises a tension adjusting roller and a servo motor. The tension adjusting roller is used to abut against the surface of the film roll. The output end of the servo motor is rigidly connected with the tension adjusting roller, and is used to drive the tension adjusting roller to move to adjust the tension of the film roll. The tension sensor is used to detect the tension value of the film roll during conveying. The servo motor is configured to drive the tension adjusting roller to move based on the tension value.

[0006] In the technical solution of the embodiment of the present application, the servo motor has the advantages of fast response speed and high control precision. The servo motor is used to drive the tension adjusting roller to move to adjust the tension of the film roll, which can achieve faster response speed and improve the precision of tension adjustment. The controllability of the servo motor driving the tension adjusting roller to move is stronger, so there is no need to set high and low limits of the movement of the tension adjusting roller, the adjustment range is increased, the winding shaft reverse winding process can be omitted, and the fault recovery efficiency is improved.

[0007] In some embodiments, the tension adjusting roller is configured to drive the tension adjusting roller to move in a first direction in response to the tension value being greater than a first threshold value, and drive the tension adjusting roller to move in a second direction in response to the tension value being less than the first threshold value and greater than a second threshold value, wherein the first threshold value is greater than the second threshold value, and the second direction is different from the first direction.

[0008] In the technical scheme of the embodiments of the present application, the tension sensor can detect the tension value of the film roll in real time, and the servo motor drives the tension adjusting roller to move according to the tension value, which can quickly adjust in time according to the tension change of the film roll, realize faster response speed, and reduce the tension fluctuation range.

[0009] In some embodiments, the tension adjusting roller is configured to stop moving or move in a preset avoidance direction in the case of film roll breakage.

[0010] In the technical scheme of the embodiments of the present application, the tension adjusting roller is configured to stop moving or move in a preset avoidance direction in the case of film roll breakage, which can clearly determine the movement direction of the tension adjusting roller in the case of film roll breakage, avoid non-controlled actions, and improve the safety and stability of the device.

[0011] In some embodiments, the tension adjusting roller is configured to stop moving or move in a preset avoidance direction in response to the tension value being less than or equal to a third threshold value, and the third threshold value is less than or equal to the second threshold value.

[0012] In the technical scheme of the embodiments of the present application, the third threshold value less than or equal to the second threshold value is set as a criterion for determining whether the film roll is abnormal, when the tension value of the film roll is less than or equal to the third threshold value, it is determined that the film roll is abnormal, and the tension adjusting roller is controlled to stop moving or move in a preset avoidance direction, which can ensure the safety of the conveying operation and avoid non-controlled actions.

[0013] In some embodiments, the tension adjusting roller is configured to stop moving or move in a preset avoidance direction in response to a drop rate of the tension value being greater than a fourth threshold value.

[0014] In the technical scheme of the embodiments of the present application, the drop rate of the tension of the film roll during conveying is used as a criterion for determining whether the film roll is abnormal, which can more timely and accurately identify the abnormal state of the film roll, avoid misjudgment caused by tension changes due to other interference factors in the judgment of whether the film roll is broken, and improve the stability of the device.

[0015] In some embodiments, the preset avoidance direction is the same as the first direction.

[0016] In the technical solution of the embodiment of the application, the first direction is a direction in which the film roll tension decreases, and setting the preset avoidance direction as the same as the first direction can ensure that the moving direction of the tension adjusting roller in the event of an unexpected situation or a broken belt is a direction to avoid damage to the film roll, thereby effectively avoiding the safety risk caused by uncontrolled action of the tension adjusting roller in the unexpected situation and ensuring production safety.

[0017] In some embodiments, the first direction is a film unwinding direction.

[0018] In the technical solution of the embodiment of the application, after the belt is broken, the film roll needs to be reconnected, which requires the film roll to be unwound first, and after the connection is completed, the transmission is restarted until the film roll tension reaches the preset tension value. In the embodiment, the tension adjusting roller actively moves to the unwinding side after the belt is broken, thereby reducing the length of the film roll released for connection, and the time required to restore the film roll tension to the required tension value after the connection is completed is also shorter, thereby improving the debugging efficiency of the broken belt changeover.

[0019] In some embodiments, the tension sensor is arranged on the tension adjusting roller.

[0020] In the technical solution of the embodiment of the application, the tension sensor is directly arranged on the tension adjusting roller, which can more accurately measure the tension value of the film roll in contact with the tension adjusting roller, avoid errors caused by detection errors, and facilitate the transmission of detection signals, thereby achieving faster tension adjustment response and reducing the fluctuation range of the film roll tension.

[0021] In some embodiments, the film roll conveying device further comprises a control unit electrically connected to the tension sensor and the servo motor, and the control unit is configured to control the servo motor in response to the tension value output by the tension sensor.

[0022] In the technical solution of the embodiment of the application, the control unit uses PID operation to control the output parameters of the servo motor in a timely manner according to the tension change during film roll conveying, thereby achieving fast response of tension adjustment, directly driving the connecting rod to move the tension adjusting roller, and keeping the film roll tension fluctuating around the preset tension value, thereby reducing the tension fluctuation range and improving production efficiency.

[0023] An embodiment of the second aspect of the application provides a film roll conveying method, comprising the following steps:

[0024] obtaining a tension value of the film roll,

[0025] based on the tension value, driving the tension adjusting roller to move to adjust the tension of the film roll.

[0026] The technical scheme of the embodiment of the application can drive the tension adjusting roller to move to adjust the tension of the film roll according to the detected tension value of the film roll, can achieve a faster response speed, improve the accuracy of tension adjustment, can cancel the setting of the high limit and low limit of the tension adjusting roller by using a servo motor to drive, increase the adjustment range, thereby saving the reverse winding shaft material collecting process, improve the fault recovery efficiency, and improve the coating quality and production efficiency of the battery electrode sheet.

[0027] In some embodiments, based on the tension value, the tension adjusting roller is driven to move to adjust the tension of the film roll, including:

[0028] In response to the tension value being greater than a first threshold value, the tension adjusting roller is driven to move in a first direction;

[0029] In response to the tension value being less than the first threshold value and greater than a second threshold value, the tension adjusting roller is driven to move in a second direction;

[0030] In response to the tension value being less than or equal to a third threshold value, the tension adjusting roller is driven to stop moving or move in a preset avoidance direction;

[0031] The first threshold value is greater than the second threshold value, and the second threshold value is greater than or equal to the third threshold value, and the second direction is different from the first direction.

[0032] The technical scheme of the embodiment of the application can drive the tension adjusting roller to move to adjust the tension of the film roll according to the detected tension value of the film roll, can achieve a faster response speed, improve the accuracy of tension adjustment, can cancel the setting of the high limit and low limit of the tension adjusting roller by using a servo motor to drive, increase the adjustment range, thereby saving the reverse winding shaft material collecting process, improve the fault recovery efficiency, and improve the coating quality and production efficiency of the battery electrode sheet.

[0033] In some embodiments, based on the tension value, the tension adjusting roller is driven to move to adjust the tension of the film roll, including:

[0034] In response to the tension value being greater than a first threshold value, the tension adjusting roller is driven to move in a first direction;

[0035] In response to the tension value being less than the first threshold value and greater than a second threshold value, the tension adjusting roller is driven to move in a second direction;

[0036] In response to the falling rate of the tension value being greater than or equal to a fourth threshold value, the tension adjusting roller is driven to stop moving or move in a preset avoidance direction,

[0037] The first threshold value is greater than the second threshold value, and the second direction is different from the first direction.

[0038] In the technical scheme of the embodiment of the present application, the conveying state of the film roll is judged according to the change rate of the film roll tension, so that the abnormal state of the film roll can be more accurately recognized and adjusted accordingly, the false action caused by misjudgment is avoided, and the uncontrolled action leading to an accident is also avoided.

[0039] In some embodiments, the film roll conveying method further comprises the step of: driving the tension adjusting roller to stop moving or move in a preset avoidance direction in response to the film roll breakage.

[0040] In the technical scheme of the embodiment of the present application, the movement mode of the tension adjusting roller when the film roll breaks is avoided, so that the uncontrolled action of moving according to the change of the tension value after the breakage is avoided, and the safety of the surrounding equipment and personnel is ensured.

[0041] In some embodiments, the preset avoidance direction is the same as the first direction, and the first direction is the unwinding direction.

[0042] In the technical scheme of the embodiment of the present application, the preset avoidance direction is set to be the same as the first direction in which the film roll tension decreases, so that the moving direction of the tension adjusting roller in the case of an unexpected situation or breakage is the direction to avoid damage to the film roll, the safety risk caused by the uncontrolled action of the tension adjusting roller in the unexpected situation is effectively avoided, and the production safety is ensured. At the same time, setting the first direction to point to the unwinding direction can reduce the excessive length of the film roll reversed and unwound during roll changing or breakage connection, and thus the too long connection time caused by the excessive length of the film roll can be reduced, and the production efficiency is affected.

[0043] In some embodiments, the film roll conveying method further comprises:

[0044] In response to the tension value of the film roll satisfying a preset condition, a current position of the tension adjusting roller is obtained;

[0045] It is judged whether the current position deviates from a preset position or not;

[0046] In response to the current position deviating from the preset position, the servo motor is controlled to drive the tension adjusting roller to move to the preset position at a preset speed,

[0047] According to the preset moving speed, at least one of a first speed of the film roll on the unwinding side of the tension adjusting roller and a second speed of the film roll on the winding side of the tension adjusting roller is adjusted, so that the tension value of the film roll satisfies the preset condition during the movement of the tension adjusting roller.

[0048] In the technical scheme of the embodiment of the present application, the tension adjusting roller is actively returned to the preset position by the servo motor, so that the tension adjusting roller is always located at the preset position in the tension balance state, the risk caused by uncontrolled movement is avoided, and the unwinding speed of the first conveying roller and the second conveying roller is adjusted, so that the tension is balanced and the tension adjusting roller returns to the preset position faster, and the fluctuation of the tension is effectively controlled.

[0049] An embodiment of the third aspect of the present application provides an electronic device, comprising: at least one processor; and a memory connected with the at least one processor in communication, wherein the memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor to enable the at least one processor to perform the method according to any one of the preceding embodiments.

[0050] An embodiment of the fourth aspect of the present application provides a computer readable storage medium, storing a computer program, and the computer program is executed by a processor to implement the method according to any one of the preceding embodiments.

[0051] The above description is only a summary of the technical solutions of the present application. In order to enable the technical means of the present application to be more clearly understood, and to be implemented according to the content of the description, and in order to enable the above and other purposes, characteristics and advantages of the present application to be more apparent and easy to understand, the following specific embodiments of the present application are described. BRIEF DESCRIPTION OF DRAWINGS

[0052] In the drawings, the same reference numbers in the several figures indicate corresponding or similar components or elements. The drawings are not necessarily to scale, emphasis instead being placed upon illustrating the principles of the application. It is to be understood that the drawings are only intended to depict some embodiments of the application and are not intended to limit the scope of the application.

[0053] Figure 1 Structure schematic diagram of the film roll conveying device of some embodiments of the present application;

[0054] Figure 2 Structure schematic diagram of the film roll conveying device of some embodiments of the present application;

[0055] Figure 3 Structure schematic diagram of the film roll conveying device of some embodiments of the present application;

[0056] Figure 4 Working schematic diagram of the control unit in the film roll conveying device of some embodiments of the present application;

[0057] Figure 5 Structure schematic diagram of the tension adjusting roller returning to the preset position in some embodiments of the present application.

[0058] Legend of reference signs:

[0059] Film roll conveying device 100, tension adjusting mechanism 101, servo motor 102, tension adjusting roller 103, connecting rod 104, tension sensor 105, control unit 106, film roll 200, first conveying roller 201, second conveying roller 202, first driving unit 2011, second driving unit 2021, first direction F1, second direction F2, first position A1, second position A2, third position A3, fourth position A4, current position P1, projection point P2, P3, winding point B, C, advancing direction X. DETAILED DESCRIPTION

[0060] The embodiments of the technical solutions of the present application will be described in detail below with reference to the drawings. The following embodiments are only used to more clearly illustrate the technical solutions of the present application, and therefore only serve as examples, and cannot limit the protection scope of the present application.

[0061] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the present application; the terms "comprising" and "having," and any variations thereof, as used in the specification and claims and the aforementioned drawings, are intended to cover not only the inclusive but also the exclusive.

[0062] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "a plurality of" is two or more, unless otherwise explicitly and specifically limited.

[0063] Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the present application. The appearance of the phrase in various places in the specification does not necessarily all refer to the same embodiment, nor is it necessarily independent or alternative embodiments to each other. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0064] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship between the associated objects, which means that there can be three relationships, for example, A and / or B, which can represent the three cases of A alone, A and B together, and B alone. In addition, the character " / " in this paper generally represents that the front and rear associated objects are a "or" relationship.

[0065] In the description of the embodiments of the present application, the term "a plurality of" refers to two or more (including two), and similarly, "a plurality of groups" refers to two or more groups (including two groups), and "a plurality of pieces" refers to two or more pieces (including two pieces).

[0066] In the description of the embodiments of the present application, the orientations or positional relationships indicated by the technical terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the embodiments of the present application and simplifying the description, and are not intended to indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the embodiments of the present application.

[0067] In the description of the embodiments of the present application, unless otherwise explicitly specified and limited, the technical terms "mounting", "connection", "connection", "fixing" and the like should be understood in a broad sense, for example, can be fixedly connected, or can be detachably connected, or can be integrated; can be mechanically connected, or can be electrically connected; can be directly connected, or can be indirectly connected through an intermediate medium; can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0068] At present, from the development of market situation, the application of power battery is more and more extensive. Power battery is not only applied to energy storage power supply system of hydropower, thermal power, wind power and solar power station, but also widely used in electric bicycles, electric motorcycles, electric vehicles and other electric vehicles, military equipment, aerospace and other fields. With the continuous expansion of the application field of power battery, the demand of its market is also increasing.

[0069] The power battery includes a battery monomer. The electrode sheet is the main component of the monomer battery, which directly determines the electrochemical performance and safety of the battery. The battery electrode sheet is composed of a metal current collector and a uniform coating on the metal current collector. The coating process is a process of coating the coating on the current collector film roll, which is an important link in the production process of the battery, and the quality of the battery is greatly affected by the coating process; therefore, in order to ensure the production quality of the battery, the tension balance of the film roll should be kept at all times during the conveying process of the foil film roll, otherwise it will affect the uniformity and consistency of the coating, and further affect the quality of the battery.

[0070] The applicant notices that the film roll is conveyed by the rotation of the conveying rollers, and in some cases, a tension adjusting mechanism is arranged between two conveying rollers to adjust the tension of the film roll during conveying, which can include a swing rod, a tension adjusting roller at one end of the swing rod, and a floating roller cylinder driving the swing rod, which controls the proportional valve output according to the tension change of the film roll, and a potentiometer can also be provided to detect the swing position of the swing rod. In order to limit the swing range of the swing rod, a high limit and a low limit are set. The applicant found through research that the proportional valve control response speed of the floating roller cylinder is slow, the accuracy of pneumatic control is not high, the tension fluctuation range is large, the setting of the high limit and the low limit controls the swing amplitude of the swing rod, but also limits the adjustment range of the tension adjusting roller, reduces the buffer margin of the tension adjustment, and when some unexpected situations occur, the adjustment needs cannot be met, which requires more time to recover from failure, thereby affecting the production progress.

[0071] Based on the above considerations, in order to solve the tension stability problem of the film roll conveying, ensure the safety of production, shorten the fault recovery time, and improve the production efficiency. The applicant has designed a film roll conveying device and a film roll conveying method, electronic equipment and computer readable storage medium after in-depth research. The technical scheme of the present application sets up a tension adjusting roller, uses a servo motor to drive the tension adjusting roller to move, responds to the tension fluctuation in time and adjusts, reduces the fluctuation range of the film roll tension, and improves the safety and efficiency of production.

[0072] The battery monomer disclosed in the embodiments of the present application can be used in electric devices such as vehicles, ships or aircraft, but is not limited to. The power supply system of the electric device can be composed of the battery monomer and the battery disclosed in the present application. In this way, it is beneficial to alleviate and automatically adjust the deterioration of the cell swelling force, supplement the consumption of electrolyte, and improve the stability of battery performance and battery life.

[0073] The embodiments of the present application provide a power consumption device using a battery as a power supply. The power consumption device can be, but is not limited to, a mobile phone, a tablet, a notebook computer, an electric toy, an electric tool, an electric car, an electric vehicle, a ship, a spacecraft, etc. Among them, the electric toy can include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric plane toys, etc. The spacecraft can include airplanes, rockets, space shuttles, and spacecraft, etc.

[0074] A battery cell is the basic unit that makes up a battery. A battery cell includes a casing, electrode assembly, and electrolyte. The electrode assembly consists of a positive electrode, a negative electrode, and a separator. A battery cell primarily functions by the movement of metal ions between the positive and negative electrodes. The positive electrode includes a positive current collector and a positive active material layer. The positive active material layer is coated on the surface of the positive current collector. The uncoated positive current collector protrudes from the coated positive current collector and serves as the positive electrode tab. Taking a lithium-ion battery as an example, the positive current collector can be made of aluminum, and the positive active material can be lithium cobalt oxide, lithium iron phosphate, ternary lithium, or lithium manganese oxide, etc. The negative electrode includes a negative current collector and a negative active material layer. The negative active material layer is coated on the surface of the negative current collector. The uncoated negative current collector protrudes from the coated negative current collector and serves as the negative electrode tab. The negative electrode current collector can be made of copper, and the negative electrode active material can be carbon or silicon, etc. In the manufacturing process of a battery cell, the process of coating the positive electrode current collector with a positive electrode active material layer and the negative electrode current collector with a negative electrode active material layer is called the coating process. The current collector roll with the coating layer obtained by the coating process is called a film roll.

[0075] An embodiment of the first aspect of this application provides a film roll conveying device 100, such as... Figure 1 As shown, the film roll conveying device 100 includes a tension adjustment mechanism 101 and a tension sensor 105. The tension adjustment mechanism 101 includes a servo motor 102 and a tension adjustment roller 103. The tension adjustment roller 103 abuts against the surface of the film roll 200. The output end of the servo motor 102 is rigidly connected to the tension adjustment roller 103. The tension sensor 105 is used to detect the tension value of the film roll 200 during conveying. The servo motor 102 can drive the tension adjustment roller 103 to move according to the tension value detected by the tension sensor 105, thereby realizing the adjustment of the tension of the film roll 200.

[0076] For example, the film roll 200 is conveyed along the travel direction X under the action of the first conveyor roller 201 and the second conveyor roller 202, passing sequentially through the first conveyor roller 201, the tension adjusting roller 103, and the second conveyor roller 202. The first conveyor roller 201 can be either an unwinding roller or an intermediate conveyor roller; the second conveyor roller 202 can be either a take-up roller, an intermediate conveyor roller, or a drive roller. For example, as... Figure 1 As shown, the first conveyor roller 201 is an unwinding roller, and the second conveyor roller 202 is an intermediate conveyor roller. It can be understood that the tension sensor 105 can be one or more. The servo motor 102 can be a rotary servo motor or a linear servo motor, and the servo motor 102 is connected to the tension adjusting roller 103 via a connecting rod 104.

[0077] In the technical solution of the embodiment of the application, the servo motor has the advantages of fast response speed and high control precision, the servo motor is used to drive the tension adjusting roller to move to adjust the tension of the film roll, faster response speed can be achieved, the precision of tension adjustment is improved, the servo motor has stronger controllability in driving the tension adjusting roller to move, therefore, high limit and low limit do not need to be set, the adjustment range is increased, the material collection process of reversing the unwinding shaft can be omitted, and the fault recovery efficiency is improved.

[0078] On the other hand, the servo motor can be provided with an encoder, which can accurately obtain the torque output by the servo motor. In the scheme in which the servo motor is used in cooperation with the tension sensor, the output torque of the servo motor can be used to automatically calibrate the tension sensor, so that the time required for calibration of the tension sensor in the subsequent use process is saved, and the coating quality and production efficiency of the battery pole piece are improved.

[0079] According to some embodiments of the application, the tension adjusting roller 103 is configured to:

[0080] In response to the tension value of the film roll during conveying detected by the tension sensor 105 being greater than a first threshold value, the tension adjusting roller 103 is driven to move in a first direction F1;

[0081] In response to the tension value of the film roll during conveying detected by the tension sensor 105 being less than the first threshold value and greater than a second threshold value, the tension adjusting roller 103 is driven to move in a second direction F2;

[0082] The first threshold value is greater than the second threshold value, and the second direction F2 is different from the first direction F1.

[0083] In an example, the first threshold value is a preset tension value required when the film roll is conveyed, when the tension value of the film roll during conveying is less than the first threshold value, it indicates that the film roll becomes loose at this time, which corresponds to the film roll conveying state being in a loose state; and when the tension value of the film roll during conveying is greater than the first threshold value, it indicates that the film roll becomes tight, which corresponds to the film roll conveying state being in a tight state. Corresponding to different conveying states, the tension adjusting roller is driven to move in different directions to keep the tension stable when the film roll is conveyed.

[0084] The tension value of the film roll is detected in real time by the tension sensor, and the tension adjusting roller is driven to move by the servo motor according to the tension value, so that the tension adjusting roller can be quickly adjusted in a timely manner according to the tension change of the film roll, faster response speed can be achieved, and the tension fluctuation range is reduced.

[0085] According to some embodiments of the application, the tension adjusting roller 103 is configured to stop moving or move in a preset avoidance direction in the case of a broken belt of the film roll 200.

[0086] In an example, the preset avoidance direction is a direction preset according to the conveying direction and the position of the tension adjusting roller to avoid other objects or personnel positions.

[0087] In the embodiment, the tension adjusting roller is arranged to stop moving or move in the preset avoidance direction in the case of film roll breakage, so that the movement direction of the tension adjusting roller in the case of film roll breakage can be determined, and the safety and stability of the device operation can be improved.

[0088] According to some embodiments of the present application, the tension adjusting roller 103 is configured to stop moving or move in the preset avoidance direction in response to the tension value of the film roll 200 during conveying being less than or equal to a third threshold value, the third threshold value being less than or equal to the second threshold value.

[0089] In the embodiment, the tension value of the film roll decreases rapidly to 0 in the case of film roll breakage. In the embodiment, the third threshold value less than or equal to the second threshold value is set as a criterion for determining whether the film roll is abnormal, and when the tension value of the film roll is less than or equal to the third threshold value, it is determined that the film roll is in an abnormal state, for example, breakage, and the tension adjusting roller is controlled to stop moving or move in the preset avoidance direction, so that the safety of the conveying operation can be ensured and uncontrolled action can be avoided.

[0090] According to some embodiments of the present application, the tension adjusting roller 103 is configured to stop moving or move in the preset avoidance direction in response to the rate of decrease of the tension value of the film roll 200 during conveying being greater than a fourth threshold value.

[0091] In the embodiment, the tension of the film roll decreases rapidly to 0 in a short time in the case of breakage, and the rate of decrease of the tension of the film roll during conveying is used as a criterion for determining whether the film roll is abnormal, so that the abnormal state of the film roll can be identified more timely and accurately, and the stability of the device can be improved.

[0092] According to some embodiments of the present application, the preset avoidance direction is the same as the first direction F1.

[0093] In the embodiment, the first direction is the direction in which the tension of the film roll decreases, and the preset avoidance direction is set to be the same as the first direction, so that the movement direction of the tension adjusting roller in the case of unexpected situation or breakage is the direction to avoid damage to the film roll, the safety risk caused by uncontrolled action of the tension adjusting roller in the unexpected situation can be effectively avoided, and the production safety can be ensured.

[0094] According to some embodiments of the present application, as shown in Figure 2 and Figure 3 , the first direction F1 is the unwinding direction.

[0095] In an example, the conveying of the film roll is in a direction from the unwinding roll to the receiving roll, and the unwinding direction refers to a direction in which the film roll is conveyed relative to the tension conveying roll to the side of the unwinding roll.

[0096] In this embodiment, it is considered that the film roll needs to be re-taped after the tape is broken, which requires the film roll to be unwound first, and then restarted after the tape is completed. The conveying is restarted until the tension of the film roll reaches the preset tension value. In this embodiment, the tension adjusting roll actively moves to the unwinding side after the tape is broken, which can reduce the length of the film roll released for tape connection. At the same time, after the tape connection is completed, the time required to restore the tension of the film roll to the required tension value is also shorter, which improves the debugging efficiency of the tape replacement.

[0097] According to some embodiments of the present application, as shown in Figure 1 The tension sensor 105 is arranged on the tension adjusting roll 103.

[0098] In this embodiment, the tension sensor is directly arranged on the tension adjusting roll, which can more accurately measure the tension value of the film roll in contact with the tension adjusting roll, avoid detection errors that cause the tension adjusting roll to move incorrectly, and facilitate the transmission of detection signals. It can achieve faster tension adjusting response and reduce the fluctuation range of the film roll tension.

[0099] According to some embodiments of the present application, as shown in Figure 4 The film roll conveying device 100 further comprises a control unit 106, which is electrically connected with the tension sensor 105 and the servo motor 102.

[0100] The control unit 106 can drive the tension adjusting roll 103 to move to adjust the tension of the film roll 200 according to the tension value detected by the tension sensor 105 when the film roll 200 is conveyed.

[0101] In an example, the control unit can perform PID operation on the detected tension value and the preset tension value, and control the output torque and speed of the servo motor 106 according to the operation result to drive the movement of the tension adjusting roll.

[0102] The control unit can use PID operation to control the output parameters of the servo motor in a timely manner according to the tension change of the film roll during conveying, so as to realize the rapid response of the tension adjusting, and then directly drive the connecting rod to move the tension adjusting roll. The tension of the film roll always fluctuates around the preset tension value, which reduces the fluctuation range of the tension and improves the production efficiency.

[0103] The second aspect of the present application provides a control method of a film roll conveying device, which comprises:

[0104] obtaining the tension value of the film roll 200,

[0105] Based on the tension value of the film roll 200, the driving tension adjusting roller 103 is driven to move to adjust the tension of the film roll 200.

[0106] As shown in the examples, Figure 1 The film roll 200 is sequentially wound on the first conveying roller 201, the tension adjusting roller 103 and the second conveying roller 202, and the tension sensor 105 is used to detect the tension value of the film roll 200 during conveying. The servo motor 102 is used to drive the tension adjusting roller 103 to move towards the surface of the film roll 200 to maintain the tension value of the film roll 200 within the desired fluctuation range.

[0107] The tension adjusting mechanism drives the tension adjusting roller to move according to the detected tension value of the film roll to adjust the tension of the film roll, which can achieve faster response speed and improve the accuracy of tension adjustment. The use of a servo motor to drive can cancel the high and low limit settings near the tension adjusting roller, increase the adjustment range, thereby eliminating the winding shaft reverse winding process, improving the fault recovery efficiency, and improving the coating quality and production efficiency of the battery electrode sheet.

[0108] According to some embodiments of the present application, as shown in the examples, Figure 2 and Figure 3 Based on the tension value of the film roll detected by the tension sensor during conveying, the tension adjusting roller is driven to move to adjust the tension of the film roll, including:

[0109] In response to the detected tension value being greater than a first threshold value, the tension adjusting roller 103 is driven to move in a first direction F1;

[0110] In response to the detected tension value being less than a second threshold value and greater than a third threshold value, the tension adjusting roller 103 is driven to move in a second direction F2;

[0111] In response to the detected tension value being less than or equal to the third threshold value, the tension adjusting roller 103 is driven to stop moving or move in a preset avoidance direction;

[0112] Wherein, the first threshold value is greater than the second threshold value, and the second threshold value is greater than or equal to the third threshold value, and the second direction is different from the first direction.

[0113] For example, the first threshold is a preset tension value that needs to be maintained during membrane roll transport. When the tension value is greater than the first threshold, the membrane roll is considered to be in a tight state. When the membrane roll tension is less than the first threshold but greater than the second threshold, the membrane roll is in a loose state. The second and third thresholds are manually set tension values. A value greater than the second threshold indicates that the tension change of the membrane roll is still within the normal fluctuation range and can be adjusted by moving the tension adjusting roller normally. The third threshold is a threshold for judging whether the membrane roll has broken. Since the tension will drop rapidly to 0 when the membrane roll breaks, an abnormality, such as a breakage, is considered to have occurred only when the detected tension value is less than or equal to the third threshold. It can be understood that the second threshold is a preset tension value that is greater than or equal to the third threshold.

[0114] like Figure 2 and Figure 3 As shown, when the detected tension value of the membrane roll 200 is less than the first threshold but greater than the second threshold, it is determined that the membrane roll 200 is in a loose state. The servo motor 102 drives the tension adjusting roller 103 to move from the first position A1 to the second position A2. At this time, the tension adjusting roller 103 readjusts the tension value of the membrane roll 200 to the preset tension value. When the detected tension of the membrane roll 200 is greater than the first threshold, it is determined that the membrane roll 200 is in a tight state. The servo motor 102 drives the tension adjusting roller 103 to move from the first position A1 to the third position A3, so that the tension value of the membrane roll 200 is readjusted to the preset tension value. When the detected tension value of the membrane roll 200 is less than the third threshold, it is determined that the membrane roll 200 is in an abnormal state. After the servo motor 102 controls the tension adjusting roller 103 to stop, it either stops or moves towards the fourth position A4.

[0115] The tension value of the film roll is monitored in real time by a tension sensor, and the servo motor is controlled to respond promptly to changes in the tension value. Depending on whether the film roll is in a tight, loose, or abnormal state, the tension adjustment roller is driven to move to adjust the tension. In particular, for the abnormal state of significantly reduced tension, the tension adjustment roller is actively controlled to stop moving or move in a preset avoidance direction, so as to realize active control of the tension adjustment roller, avoid uncontrolled actions, and improve the safety and reliability of film roll conveying.

[0116] According to some embodiments of this application, driving the tension adjusting roller 103 to move to adjust the tension of the film roll 200 based on the tension value detected by the tension sensor 105 during film roll 200 conveying includes:

[0117] In response to the detected tension value being greater than or equal to a first threshold, the tension adjusting roller 103 is driven to move in the first direction F1;

[0118] In response to the detected tension value being less than a first threshold and greater than a second threshold, the tension adjusting roller 103 is driven to move in the second direction F2;

[0119] in response to the detected rate of decrease of the tension value being greater than or equal to a fourth threshold value, driving the tension adjustment roller 103 to stop moving or to move in a preset avoidance direction,

[0120] wherein the first threshold value is greater than the second threshold value, and the second direction F2 is different from the first direction Fl.

[0121] It can be understood that the rate of increase of the tension value refers to the increase value of the tension value per unit time, and the rate of decrease refers to the decrease value of the tension value per unit time. The greater the rate of increase or the rate of decrease, the faster the increase or the decrease. When the film roll is broken, the tension will rapidly decrease to 0 in a short time. The rate of decrease of the tension of the film roll in this process is relatively large. By detecting this change, the risk of film roll breakage can be well identified in advance, and the movement of the tension adjustment roller can be actively controlled. It can be understood that the fourth threshold value is a threshold value artificially selected according to the rate of change of the tension when the film roll is broken.

[0122] In this embodiment, the transmission state of the film roll is judged by the rate of change of the tension of the film roll, so that the abnormal state of the film roll can be more accurately identified and adjusted accordingly, to avoid false actions caused by misjudgment, and to avoid uncontrolled actions that may cause accidents.

[0123] According to some embodiments of the present application, in response to the film roll 200 being broken, the tension adjustment roller 103 is driven to stop moving or to move in a preset avoidance direction.

[0124] In an example, after the film roll is broken, the movement of the tension adjustment roller is actively controlled by the servo motor, so that it stops or moves in a preset avoidance direction. The film roll breakage state can be judged from the tension value detected by the tension sensor, or can be judged by other detection results, such as CCD camera detection.

[0125] In this embodiment, the movement mode of the tension adjustment roller when the film roll is broken is avoided, so that uncontrolled actions such as moving according to the change of the tension value after the film roll is broken do not occur, and the safety of surrounding equipment and personnel is ensured.

[0126] According to some embodiments of the present application, the preset avoidance direction is the same as the first direction, and the first direction is the unwinding direction.

[0127] In this embodiment, the preset avoidance direction is set to be the same as the first direction in which the tension of the film roll decreases, so that the movement direction of the tension adjustment roller in the event of an accident or film roll breakage is the direction that avoids damage to the film roll, effectively avoiding the safety risks caused by uncontrolled actions of the tension adjustment roller in the event of an accident, and ensuring production safety. At the same time, setting the first direction to point to the unwinding direction can reduce the excessive length of the film roll that is reversed and unwound during roll changing or broken belt joining, thereby reducing the time-consuming of the joining process and affecting the production efficiency.

[0128] According to some embodiments of the present application, as shown in Figure 2 and Figure 3 The control method of the film roll conveying device further comprises:

[0129] In response to the tension value of the film roll 200 satisfying a preset condition, the current position of the tension adjusting roller 103 is obtained,

[0130] It is judged whether the current position of the tension adjusting roller 103 deviates from a preset position or not;

[0131] In response to the current position of the tension adjusting roller 103 deviating from the preset position, the servo motor 102 is controlled to drive the tension adjusting roller 103 to move to the preset position at a preset speed;

[0132] At least one of the first speed of the film roll 200 on the unwinding side of the tension adjusting roller 103 and the second speed of the film roll 200 on the winding side of the tension adjusting roller 103 is adjusted based on the preset moving speed, so that the tension value of the film roll 200 satisfies the preset condition during the movement of the tension adjusting roller 103.

[0133] For example, the tension value of the film roll satisfying the preset condition means that the detected tension value of the film roll is equal to the first threshold value or the difference with the first threshold value is very small, at this time it can be considered that the film roll is in a constant tension or approximate constant tension state, at this time the tension adjusting roller has completed a tension adjustment. The film roll conveying is from the unwinding roller to the receiving roller. The unwinding side refers to the side of the film roll close to the unwinding roller relative to the tension adjusting roller, and the winding side refers to the side of the film roll close to the receiving roller relative to the tension adjusting roller. It can be understood that the fluctuation of the film roll tension mainly comes from the speed difference between the unwinding side and the winding side, which makes the film roll become loose or tense. The preset position is an intermediate position of the movement of the tension adjusting roller, and according to the preset conveying state, the film roll is under the tension of the first threshold value, and the tension adjusting roller is located at this position. When the tension of the film roll fluctuates, the tension adjusting roller will move relative to the preset position to maintain the tension of the film roll. It can be understood that the first speed of the unwinding side is the unwinding speed of the first conveying roller located on the unwinding side, and the second speed of the winding side is the winding speed of the second conveying roller located on the winding side; the tension value of the film roll during the movement of the tension adjusting roller satisfies the preset condition, which means that the tension of the film roll is maintained constant or approximately constant to meet the requirement of constant tension conveying of the film roll.

[0134] The returning of the tension adjusting roller to the preset position includes passive returning and active returning. The passive returning is achieved by adjusting the rotating speed of the first conveying roller or the second conveying roller, adjusting the conveying speed of the two ends of the film roll to change the tension of the film roll, and then driving the tension adjusting roller to move to the preset position according to the tension change by the servo motor. The active returning is achieved by actively applying power to the tension adjusting roller by the servo motor to return the tension adjusting roller to the preset position at a preset speed. At this time, in order to keep the tension of the film roll stable,

[0135] The rotating speed of the first conveying roller or the second conveying roller needs to be controlled so that the length change of the film roll between the first conveying roller and the second conveying roller adapts to the moving speed of the tension adjusting roller, so that the tension of the film roll is always kept stable. The adjusting speed of the active returning is faster than that of the passive returning, and the position change of the tension adjusting roller under the constant tension of the film roll can be realized based on program control, and the fluctuation range of the tension of the film roll will be smaller. For example, when the tension adjusting roller 103 moves to the second position A2, the tension value of the film roll 200 returns to the preset tension value, the servo motor 102 is controlled to drive the tension adjusting roller 103 to return to the first position A1 at a preset speed. In order to keep the tension of the film roll from fluctuating during the returning process, the rotating speed of the first conveying roller 201 or the second conveying roller 202 needs to be adjusted according to the position of the tension adjusting roller and the preset speed to adapt to the returning of the tension adjusting roller 103 under the condition of keeping the constant tension of the film roll 200.

[0136] In the embodiment, the tension adjusting roller is actively returned to the preset position by the servo motor, which can ensure that the tension adjusting roller is always located at the preset position in the tension balance state, avoids the risk caused by uncontrolled movement, and adjusts the unwinding speed of the first conveying roller and the second conveying roller to keep the tension smooth and realize faster returning of the tension adjusting roller to the preset position, thereby effectively controlling the fluctuation of the tension.

[0137] An electronic device is provided in the third aspect of the embodiment, which includes at least one processor and a memory connected with the at least one processor in communication. The memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor to enable the at least one processor to perform the film roll conveying method according to any one of the preceding embodiments.

[0138] Various embodiments of the systems and techniques described above herein can be implemented in digital electronic circuit systems, integrated circuit systems, field-programmable gate arrays (FPGAs), application-specific integrated circuits (ASICs), application-specific standard products (ASSPs), systems-on-a-chip (SoCs), payload-programmable logic devices (CPLDs), computer hardware, firmware, software, and / or combinations thereof. These various embodiments may include implementations in one or more computer programs that can be executed and / or interpreted on a programmable system including at least one programmable processor, which may be a dedicated or general-purpose programmable processor, capable of receiving data and instructions from a storage system, at least one input device, and at least one output device, and transferring data and instructions to the storage system, the at least one input device, and the at least one output device.

[0139] An embodiment of the fourth aspect of this application provides a computer-readable storage medium storing a computer program that, when executed by a processor, implements the film roll transport method described in any of the foregoing embodiments.

[0140] Computer-readable media can be tangible media that may contain or store programs for use by or in conjunction with an instruction execution system, apparatus, or device. Machine-readable media can be machine-readable signal media or machine-readable storage media. Machine-readable media can be, but is not limited to, electronic, magnetic, optical, electromagnetic, infrared, or semiconductor systems, apparatus, or devices, or any suitable combination of the foregoing. More specific examples of machine-readable storage media include electrical connections based on one or more wires, portable computer disks, hard disks, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fibers, portable compact disk read-only memory (CD-ROM), optical storage devices, magnetic storage devices, or any suitable combination of the foregoing.

[0141] like Figures 3-5 As shown, the film roll conveying device 100 includes a tension adjustment mechanism 101, a tension sensor 105, and a control unit 106. The tension adjustment mechanism 101 includes a servo motor 102, a tension adjustment roller 103, and a connecting rod 104, which drivesly connects the servo motor 102 and the tension adjustment roller 103.

[0142] The first conveying roller 201 is a pay-off roller, and the second conveying roller 202 is a driving roller. The film roll 200 is wound around the first conveying roller 201 and the second conveying roller 202 in sequence, so that the film roll 200 can be conveyed to the running direction X under the cooperation of the rotation of the first conveying roller 201 and the second conveying roller 202. The tension adjusting mechanism 101 comprises a tension adjusting roller 103 and a servo motor 102. The tension adjusting roller 103 is arranged between the first conveying roller 201 and the second conveying roller 202 and abuts against the surface of the film roll 200. The servo motor 102 is a linear servo motor. The output end of the servo motor 102 is connected to the tension adjusting roller 103 through a connecting rod 104, so as to drive the linear reciprocating motion of the tension adjusting roller 103.

[0143] When the film roll 200 is conveyed, the tension sensor 105 detects the tension value of the film roll 200 and transmits the tension value data to the control unit 106. The control unit 106 performs PID operation according to the detected tension value and the preset tension value, and controls the output parameter of the servo motor 102 according to the operation result. The servo motor 102 drives the tension adjusting roller 103 to move according to the preset working condition until the detected tension value is equal to the preset tension value through the connecting rod 104. Specifically, the control unit 106 controls the servo motor 102 to drive the tension adjusting roller 103 to move in the first direction F1.

[0144] In response to the tension value detected by the tension sensor 105 being greater than or equal to the first threshold value, the control unit 106 controls the servo motor 102 to drive the tension adjusting roller 103 to move in the first direction F1.

[0145] In response to the tension value detected by the tension sensor 105 being less than the first threshold value and greater than the second threshold value, the control unit 106 controls the servo motor 102 to drive the tension adjusting roller 103 to move in the second direction F2.

[0146] In response to the tension value detected by the tension sensor 105 being less than or equal to the third threshold value, the control unit 106 controls the servo motor 102 to drive the tension adjusting roller 103 to move in the first direction F1.

[0147] In response to the falling rate of the tension value detected by the tension sensor 105 being greater than or equal to the fourth threshold value, the control unit 106 controls the servo motor 102 to drive the tension adjusting roller 103 to move in the first direction F1.

[0148] In response to the film roll 200 being broken, the control unit 106 controls the servo motor 102 to drive the tension adjusting roller 103 to move in the first direction F1.

[0149] When the tension is adjusted to the first threshold value, the deviation distance of the position of the tension adjusting roller 103 relative to the first position A1 can be calculated according to the output data of the servo motor 102. The control unit 106 controls the servo motor 102 to drive the tension adjusting roller 103 to return to the first position A1.

[0150] AsFigure 5 As shown, the servo motor 102 is a linear servo motor, the connecting rod 104 is a transmission screw rod arranged along the horizontal position, the current position P1 of the tension adjusting roller 103 is calculated according to the data collected by the rotation encoder of the servo motor, the servo motor 102 drives the tension adjusting roller 103 to return to the first position A1 at a linear speed V, the projection points P3 and P2 on the center line of the connecting rod 104 and the distances D2 between the winding point B and the projection point P3 and the distances D4 between the winding point C and the projection point P2 can be determined according to the first conveying roller 201 and the tension sensor 105, since the first position A1 is a set position, the distances from the first position A1 to the projection points P2 and P3 are determined, and when the distance of the current position P1 relative to the first position A1 is obtained, the distance D3 between the current position P1 and the projection point P2 and the distance D1 between the current position P1 and the projection point P3 are obtained.

[0151] According to the above parameters, the control unit 106 can control the rotation speeds of the first driving unit 2011 and the second driving unit 2021, so that the angular velocity difference of the two can ensure that the tension of the film roll 200 is maintained stable when the tension adjusting roller 103 returns. The specific calculation formula is as follows:

[0152]

[0153] Wherein, ω1 is the rotation angular velocity of the first conveying roller, r1 is the distance from the film roll on the first conveying roller to the center of the roller shaft, ω2 is the rotation angular velocity of the second conveying roller, r2 is the distance from the film roll on the second conveying roller to the center of the roller shaft, v is the moving speed of the tension adjusting roller, and t is the moving time.

[0154] The above formula can calculate the relationship between the angular velocities of the first conveying roller and the second conveying roller in real time according to the moving speed and the moving time of the tension adjusting roller, so that the film roll tension can always maintain the preset tension value when the tension adjusting roller moves, and the tension fluctuation range is reduced. At the same time, the control unit 106 can also continuously correct the speeds of the first conveying roller and the second conveying roller combined with the real-time detection data of the tension sensor 105, realize dynamic fine control, meet the precision requirements of the film roll conveying, ensure the stability of production, and improve the production efficiency.

[0155] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than limit them. Although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that the technical solutions recorded in the foregoing embodiments can be modified, or some or all of the technical features can be replaced equivalently. Such modifications or replacements do not change the essence of the corresponding technical solutions, which should be covered in the scope of the claims and the specification of the present application. In particular, the technical features mentioned in each embodiment can be combined in any manner as long as there is no structural conflict. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A film roll transfer device characterized by, The tension adjusting mechanism comprises a tension adjusting roller and a servo motor, the tension adjusting roller is used to abut against the surface of the film roll, and the output end of the servo motor is rigidly connected with the tension adjusting roller and used to drive the tension adjusting roller to move to adjust the tension of the film roll. The tension sensor is used to detect the tension value of the film roll during conveying. The control unit is electrically connected with the tension sensor and the servo motor. The servo motor is configured to drive the tension adjusting roller based on the tension value; the tension adjusting roller is configured to: drive the tension adjusting roller to move in a first direction in response to the tension value being greater than a first threshold value; drive the tension adjusting roller to move in a second direction in response to the tension value being less than the first threshold value and greater than a second threshold value, the first threshold value being greater than the second threshold value, and the second direction being different from the first direction; The control unit is configured to control the servo motor in response to the tension value output by the tension sensor, comprising: obtaining a current position of the tension adjusting roller in response to the tension value of the film roll satisfying a preset condition; judging whether the current position deviates from a preset position; controlling the servo motor to drive the tension adjusting roller to move to the preset position at a preset speed in response to the current position deviating from the preset position; adjusting at least one of a first speed of the film roll on a unwinding side of the tension adjusting roller and a second speed of the film roll on a winding side of the tension adjusting roller according to the preset speed, so that the tension value of the film roll satisfies a preset condition during the movement of the tension adjusting roller. The tension adjusting roller is configured to stop moving or move in a preset avoidance direction in the case of a broken film roll. The tension adjusting roller is configured to stop moving or move in a preset avoidance direction in response to the tension value being less than or equal to a third threshold value, the third threshold value being less than or equal to the second threshold value.

2. The apparatus of claim 1, wherein, The tension adjusting roller is configured to stop moving or move in a preset avoidance direction in response to a falling rate of the tension value being greater than a fourth threshold value.

3. The apparatus of claim 1, wherein, The preset avoidance direction is the same as the first direction.

4. The apparatus of claim 1, wherein, The first direction is a unwinding direction.

5. The apparatus of any one of claims 2-4, wherein, The tension sensor is arranged on the tension adjusting roller.

6. The apparatus of claim 5, wherein, The method comprises the following steps:

7. The apparatus of any one of claims 1-4, wherein, obtaining a tension value of a film roll, 8. A control method of a film roll conveying apparatus, characterized by, driving a tension adjusting roller to move to adjust the tension of the film roll based on the tension value, comprising: driving the tension adjusting roller to move in a first direction in response to the tension value being greater than a first threshold value; and driving the tension adjusting roller to move in a second direction in response to the tension value being less than the first threshold value and greater than a second threshold value, the first threshold value being greater than the second threshold value, and the second direction being different from the first direction; obtaining a current position of the tension adjusting roller in response to the tension value of the film roll satisfying a preset condition; judging whether the current position deviates from a preset position; controlling the servo motor to drive the tension adjusting roller to move to the preset position at a preset speed in response to the current position deviating from the preset position; ​ ​ adjust at least one of a first speed of the film roll at a pay-off side of the tension adjusting roller and a second speed of the film roll at a take-up side of the tension adjusting roller according to the preset speed, so that a tension value of the film roll during movement of the tension adjusting roller satisfies a preset condition.

9. The control method according to claim 8, characterized by, The driving the tension adjusting roller to move to adjust the tension of the film roll based on the tension value further comprises: in response to the tension value being less than or equal to a third threshold value, driving the tension adjusting roller to stop moving or to move in a preset avoidance direction; wherein the second threshold value is greater than or equal to the third threshold value.

10. The control method according to claim 8, characterized by, The driving the tension adjusting roller to move to adjust the tension of the film roll based on the tension value comprises: in response to a falling rate of the tension value being greater than or equal to a fourth threshold value, driving the tension adjusting roller to stop moving or to move in a preset avoidance direction.

11. The control method according to claim 8, characterized by, The method further comprises a step of: in response to the film roll being broken, driving the tension adjusting roller to stop moving or to move in a preset avoidance direction.

12. The control method according to any one of claims 9-11, characterized by, The preset avoidance direction is the same as the first direction, and the first direction is a pay-off direction.

13. An electronic device, comprising: comprise: at least one processor; and a memory connected with the at least one processor in communication, wherein the memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor to enable the at least one processor to perform the method of any one of claims 8-12.

14. A computer readable storage medium storing a computer program, wherein the computer program comprises program instructions configured to cause a processor to perform the method according to any one of claims 1 to 13. The computer program, when executed by a processor, implements the method of any one of claims 8-12.

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