KR20230161844A - Apparutus and method for correcting swerving - Google Patents

Abstract

The skew correction device according to one embodiment applies a fluorescent material to the outer surface of the film and detects it to determine whether the film is skewed and the type of skew, and can efficiently respond to the skew correction according to the type of skew, thereby increasing the precision and accuracy of skew correction.

Description

Meander correction device and meander correction method {APPARUTUS AND METHOD FOR CORRECTING SWERVING}

The present invention relates to an apparatus and method for correcting meandering of a film that occurs during the manufacturing process of a secondary battery.

Generally, types of secondary batteries include nickel cadmium batteries, nickel hydrogen batteries, lithium ion batteries, and lithium ion polymer batteries. These secondary batteries are used not only for small products such as digital cameras, P-DVDs, MP3Ps, mobile phones, PDAs, Portable Game Devices, Power Tools, and E-bikes, but also for large products requiring high output such as electric vehicles and hybrid vehicles, as well as for surplus power generation. It is also applied and used in power storage devices that store power or renewable energy and backup power storage devices.

To manufacture such a secondary battery, the electrode active material slurry is first applied to the positive electrode current collector and the negative electrode current collector to manufacture the positive and negative electrodes, and then laminated on both sides of the separator to form an electrode assembly of a predetermined shape. forms. Then, the electrode assembly is stored in the battery case, and the electrolyte is injected and sealed.

In the process of applying active materials to the positive electrode current collector and negative electrode current collector or rolling the electrode and separator, transporting the electrode and separator along a previously designed movement path is one of the important processes for improving manufacturing quality. To determine whether the electrode and separator are moving along a set path and to correct this, a meander correction device such as EPC (Edge Position Control) is used. However, since the EPC device only determines whether the film is located on the moving path by detecting the outer edge of the film, it is difficult to distinguish whether meandering occurs due to tension of the film or due to poor winding of the film based on EPC alone. difficult. In other words, there is a limit to increasing the precision of meander correction with EPC alone. Therefore, there is a need for a device that detects meandering more precisely and corrects it more effectively.

One problem that the present invention seeks to solve is to provide a skew correction device that detects skew of a film using a fluorescent material.

Another problem to be solved by the present invention is to provide a meander correction device that determines whether the meander is due to a film's tension phenomenon or is a meander due to a winding defect, and corrects it.

A skew correction device according to an embodiment of the present invention includes an unwinder on which a film is wound, an applicator for applying a fluorescent material to one side of the film that is unwound and transported from the unwinder, a sensor portion for detecting the fluorescent material, and It may include a control unit that adjusts the movement path of the film according to the information on the fluorescent material detected by the sensor unit.

The skew correction device may further include a control unit that determines whether the film is skewed according to a change in the position of the fluorescent material, based on the position information of the fluorescent material detected by the sensor unit.

The applicator can apply a plurality of fluorescent marks at regular intervals on the outer surface of the film along the moving path through the fluorescent material.

If the spacing between the plurality of fluorescent displays changes, the control unit may determine meandering due to a tensile phenomenon of the film.

The skew correction device further includes a warning unit that warns about the stretching phenomenon of the film, and when the control unit determines that skewing has occurred due to the stretching phenomenon of the film, the control unit may operate the warning unit.

If the position of the plurality of fluorescent displays changes while the distance between the plurality of fluorescent displays is constant, the control unit may determine that the film has meandered away from the moving path.

When the control unit determines that the film has meandered away from the movement path, the control unit may control the operation of the adjusting unit.

The control unit may include at least one of a guide roll or a nip roll.

The meander correction method according to an embodiment of the present invention includes an application step in which an applicator applies a fluorescent material to one side of a film that is unwound and transported from an unwinder, a detection step in which a sensor portion detects the fluorescent material, and a control portion applies the sensor. It may include a control step of determining whether the film is skewed according to the additionally detected fluorescent material information and correcting the skewness of the film.

In the application step, the applicator applies a plurality of fluorescent marks at regular intervals on the outer surface of the film along the moving path through the fluorescent material, and in the control step, the control unit changes the spacing between the plurality of fluorescent marks. It may include a judgment step of determining the type of meandering of the film.

In the determination step, the control unit may determine that meandering has occurred due to a stretching phenomenon of the film when the spacing between the plurality of fluorescent displays changes.

The control step may further include a warning step in which, when the control unit determines that meandering has occurred due to the tension phenomenon of the film, the control unit operates a warning unit to warn about the tension phenomenon of the film.

In the determination step, if the position of the plurality of fluorescent displays changes while the distance between the plurality of fluorescent displays is constant, the control unit may determine that meandering of the film deviating from the moving path has occurred.

The control step may further include an adjustment step in which, when the control unit determines that the film deviates from the movement path has occurred, the control unit operates a control unit that adjusts the movement path of the film.

According to a preferred embodiment of the present invention, the precision and accuracy of skew correction can be increased by detecting and correcting skewness of the film using a fluorescent material.

According to a preferred embodiment of the present invention, it is possible to determine whether meandering is due to a tensile phenomenon of the film or meandering due to a winding defect and correct it, thereby enabling efficient response depending on the type of meandering and preventing damage caused by meandering.

In addition to this, effects that can be easily predicted by a person skilled in the art from the configurations according to the preferred embodiment of the present invention may be included.

The following drawings attached to this specification illustrate preferred embodiments of the present invention, and serve to further understand the technical idea of the present invention together with the detailed description of the invention described later, so the present invention includes the matters described in such drawings. It should not be interpreted as limited to only .
1 is a schematic diagram of a skew correction device according to an embodiment of the present invention.
Figure 2 is a block diagram of a skew correction device according to an embodiment of the present invention.
Figure 3 is a flowchart of a skew correction method according to another embodiment of the present invention.
Figure 4 is a flow chart of the control steps shown in Figure 3.

Hereinafter, with reference to the accompanying drawings, preferred embodiments of the present invention will be described in detail so that those skilled in the art can easily implement the present invention. However, the present invention may be implemented in various different forms and is not limited or restricted by the following examples.

In order to clearly explain the present invention, detailed descriptions of parts unrelated to the description or related known technologies that may unnecessarily obscure the gist of the present invention have been omitted, and reference signs are added to components in each drawing in this specification. In this regard, identical or similar reference signs are used to designate identical or similar components throughout the specification.

In addition, terms or words used in this specification and patent claims should not be construed as limited to their usual or dictionary meanings, and the inventor appropriately defines the concept of terms in order to explain his or her invention in the best way. It must be interpreted with meaning and concept consistent with the technical idea of the present invention based on the principle that it can be done.

FIG. 1 is a schematic diagram of a skew correction device 1 according to an embodiment of the present invention, and FIG. 2 is a block diagram of a skew correction device 1 according to an embodiment of the present invention.

Referring to Figures 1 and 2, the skew correction device 1 can correct the skew of the film F used in the manufacturing process of electrodes and separators. The film (F) may be an electrode film or a separator film. For example, when the film (F) wound on a roll is unwound and transported and subjected to processes such as rolling and coating, the moving path is deviated or the film (F) itself is deformed. By detecting the meandering of the film (F), the meandering of the film (F) can be corrected according to the pre-designed path. Specifically, the meander correction device 1 not only detects the coating line of the film F to determine whether the film F is moving in the correct path, but also applies a fluorescent material to the outer surface of the film F to determine whether the film F is moving along the correct path. By sensing, the meandering of the film F can be confirmed. Additionally, the meander correction device 1 can determine the type of meander of the film F through a change in the position of the fluorescent material with respect to the movement path and take appropriate measures accordingly.

The skew correction device 1 may include an unwinder 10, an applicator 11, a sensor unit 12, an adjustment unit 13, a warning unit 14, and a control unit 15.

The film (F) may be wound on the unwinder (10). For example, the unwinder 10 may have the shape of a roll, and a film F may be wound around the outer surface of the unwinder 10. The film F wound on the unwinder 10 may be unwound and transferred through a transfer roll placed in the middle of the process or a rewinder placed on the other side of the unwinder 10.

The applicator 11 may spray and apply a fluorescent material to one side of the film F that is unwound and transported from the unwinder 10. For example, the applicator 11 may include a receiving body in which a fluorescent material is stored and a spray nozzle that sprays the fluorescent material outward from the receiving body. In other words, the applicator 11 is located on one side of the film F and sprays the fluorescent material toward the film F, thereby allowing one side of the film F to be coated with the fluorescent material.

The applicator 11 can apply a fluorescent material to apply a plurality of fluorescent marks at regular intervals on the outer surface of the film F along the moving path of the film F. In other words, the applicator 11 can display fluorescence on the outer surface of the film F in a pre-designed pattern. As an example, the applicator 11 may be fluorescently displayed in a plurality of circular shapes. In other words, the applicator 11 can apply a fluorescent display having the shape of a plurality of dots spaced apart from each other at a certain interval to the outer surface of the film F. As another example, the applicator 11 may display a fluorescent display in the form of a line with a longitudinal direction perpendicular to the moving direction of the film (F). In other words, the applicator 11 can display fluorescent displays in the form of stripes engraved at regular intervals. As another example, the applicator 11 may be fluorescently displayed in the form of a line with a longitudinal direction parallel to the moving direction of the film F.

The sensor unit 12 can detect fluorescent substances. In other words, the sensor unit 12 can detect the fluorescent material applied at regular intervals on one side of the film (F) along the moving path of the film (F). After the fluorescent material is applied to one side of the film (F) by the applicator 11, the film (F) undergoes a rolling and coating process, and the sensor unit 12 is applied to the outer surface of the film (F), which has undergone certain processes. can be detected. According to this sequence, the film (F) coated with a fluorescent material on one side goes through a certain process, and the shape of the film (F) is changed or the film (F) deviates from its path, such as meandering. When this occurs, the occurrence of such meandering can be identified through detection of fluorescent substances. Additionally, by arranging a plurality of these functions and components in the middle of the process, continuous and detailed meandering inspection can be performed throughout the entire section.

The control unit 13 can control the movement path of the film F according to the information on the fluorescent substance detected by the sensor unit 12. For example, the control unit 13 may include at least one of a guide roll or a nip roll. In other words, the control unit 13 can guide the film F in a certain direction and guide it along a certain path.

The warning unit 14 can warn about the tension phenomenon of the film (F). For example, the warning unit 14 may warn about the tensile phenomenon of the film F by delivering visual and auditory information. In other words, the warning unit 14 includes various forms such as displays, speakers, and portable terminals, and informs users and managers of the tension of the film F, such as the location, time, and elapsed content of the tension phenomenon of the film F. Relevant information can be provided.

The control unit 15 may include at least one processor. The control unit 15 can communicate with the sensor unit 12, the control unit 13, and the warning unit 14.

Based on the position information of the fluorescent material detected by the sensor unit 12, the control unit 15 can determine whether the film F is meandering according to a change in the position of the fluorescent material. Additionally, when it is determined that the film F is meandering, the control unit 15 may determine the type of meandering based on the position information of the fluorescent material. Specifically, the meandering of the film (F) can be divided into meandering that occurs due to self-deformation, such as a tensile phenomenon of the film (F), and meandering that deviates from the moving path, such as a winding defect or a twisted path. The control unit 15 can take appropriate measures by controlling the operation of the warning unit 14 and the control unit 13 depending on the type of meandering.

Specifically, when the positions of the plurality of fluorescent displays change while the spacing between the plurality of fluorescent displays is constant, the control unit 15 may determine that the film F has meandered away from its moving path. In more detail, in a state where the spacing between the plurality of fluorescent marks applied by the applicator 11 and the gap between the plurality of fluorescent marks detected by the sensor unit 12 are the same, the plurality of fluorescent marks follow the existing movement path. If it is detected that it has deviated, the control unit 15 may determine that the film F has deviated from the path without being deformed. That is, the control unit 15 may determine that meandering, such as a winding defect or a twisted path of the film F, has occurred.

If the control unit 15 determines that the film F has meandered away from its movement path, the control unit 15 may control the operation of the adjusting unit 13. For example, if the control unit 15 determines that the film F has deviated from the existing path based on the detection information of the sensor unit 12, it operates the control unit 13 installed in the section where the meandering occurred, The meandering film (F) can be guided along a certain path or guided in a certain direction. Through the control operation of the control unit 15, the moving speed and direction of the film F can be adjusted as previously designed.

If the distance between the plurality of fluorescent displays changes, the control unit 15 may determine that the film F is tortuous due to a tensile phenomenon. In more detail, when the spacing between the plurality of fluorescent marks applied by the applicator 11 and the spacing between the plurality of fluorescent marks detected by the sensor unit 12 are different from each other, the control unit 15 controls the film (F) itself. It can be determined that phosphorus deformation, that is, a tensile phenomenon of the film F, has occurred. The tensile phenomenon of the film (F) may occur when a part of the film (F) is extended or broken during the rolling and coating process of the film (F).

If the control unit 15 determines that meandering has occurred due to the tensile phenomenon of the film F, the control unit 15 may operate the warning unit 14. In other words, the control unit 15 may operate the warning unit 14 to warn about the stretching phenomenon of the film F. For example, the control unit 15 may operate the warning unit 14 to provide users and managers with information about the section and location where tension of the film F occurs and the time of occurrence.

In this way, the reason for providing tension phenomenon information by warning users and managers rather than self-correcting for the tension phenomenon of the film (F) is that deformation problems such as tension of the film (F) cannot be solved within the process. This is not an easy issue, as it must be resolved through separately established processes and organizations.

As a result, the meander correction device 1 recognizes whether the film F is meandered according to changes in the plurality of fluorescent displays, determines the type of meander through the change in the interval between the plurality of fluorescent displays, and determines the meander type according to the meander type. By taking appropriate measures, we can respond more efficiently and precisely to the occurrence of meandering.

The skew correction device 1 may further include an Edge Position Control (EPC) 16. For example, the film F includes a coated portion and an uncoated portion, and the EPC 16 can determine whether the film F moves on a previously designed movement path by recognizing and detecting the coating line, and If it is recognized that the film (F) has meandered based on the line, the task of correcting the meander of the film (F) can be performed.

In this way, the skew correction device 1 can increase the precision of skew correction by including the EPC 16 as well as the applicator 11, sensor unit 12, and control unit 15. In addition, the skew correction device 1 can improve the accuracy of skew correction by correcting the skew of the film F in advance before performing the skew correction operation of the EPC 16.

Figure 3 is a flowchart of a skew correction method according to another embodiment of the present invention.

Referring to FIG. 3, through the skew correction method, skew that occurs during transport of the film F undergoing the process can be detected and corrected. Specifically, when the film (F) wound on a roll is unwound and transported and undergoes processes such as rolling and coating, and deviates from the path or deforms itself, meandering occurs, such meandering can be corrected through a meander correction method. You can. More specifically, when a fluorescent material is used, meandering can be detected through a change in the position of the applied fluorescent material. If meandering is detected, the meandering can be corrected through appropriate measures.

The meander correction method may include an application step (S10), a detection step (S20), and a control step (S30).

In the application step (S10), the applicator 11 may apply a fluorescent material to one side of the film F that is unwound and transferred from the unwinder 10. For example, the applicator 11 may apply a fluorescent material to apply a plurality of fluorescent marks at regular intervals on the outer surface of the film F along the moving path of the film F.

In the detection step (S20), the sensor unit 12 may detect a fluorescent substance. In other words, the sensor unit 12 can detect the fluorescent material applied at regular intervals on one side of the film (F) along the moving path of the film (F). After the fluorescent material is applied to one side of the film (F) by the applicator 11, the film (F) undergoes a rolling and coating process, and the sensor unit 12 is applied to the outer surface of the film (F), which has undergone certain processes. can be detected. According to this sequence, the film (F) coated with a fluorescent material on one side goes through a certain process, and the shape of the film (F) is changed or the film (F) deviates from its path, such as meandering. When this occurs, the occurrence of such meandering can be identified through detection of fluorescent substances.

In the control step (S30), the control unit 15 may determine whether the film F is meandering according to the fluorescent substance information detected by the sensor unit 12. In other words, the control unit 15 compares the positional relationship between the plurality of fluorescent marks applied by the applicator 11 and the plurality of fluorescent marks detected by the sensor unit 12, based on the moving path roll, and displays the plurality of fluorescent marks. If it is recognized that the position of has changed, it can be determined that meandering of the film F has occurred. Accordingly, the control unit 15 can correct the meandering of the film F through the control unit 13 and warn about the meandering of the film F through the warning unit 14.

Figure 4 is a flowchart of the control step (S30) shown in Figure 3.

Referring to FIG. 4, the control step (S30) may include a determination step (S31), a warning step (S32), and an adjustment step (S33).

In the determination step (S31), the control unit 15 may determine the type of meandering of the film F through the change in the spacing between the plurality of fluorescent displays. Specifically, the meandering of the film (F) can be divided into meandering that occurs due to self-deformation, such as a tensile phenomenon of the film (F), and meandering that deviates from the moving path, such as a winding defect or a twisted path.

If the control unit 15 determines in the judgment step (S31) that the meandering is due to the stretching phenomenon of the film (F) according to the change in the spacing between the plurality of fluorescent displays, the process proceeds to the warning step (S32), and in the warning step (S32) , the control unit 15 can operate the warning unit 14. The warning unit 14 can warn about the tension phenomenon of the film (F). For example, the warning unit 14 may warn about the tensile phenomenon of the film F by delivering visual and auditory information.

In the determination step (S31), if the position of the plurality of fluorescent displays changes while the distance between the plurality of fluorescent displays is constant, and the control unit 15 determines that the film F deviates from the moving path, the control unit 15 determines that meandering has occurred. Moving on to (S33), in the adjustment step (S33), the control unit 15 can control the operation of the adjustment unit 13. For example, if the control unit 15 determines that the film F has deviated from the existing path based on the detection information of the sensor unit 12, it operates the control unit 13 installed in the section where the meandering occurred, The meandering film (F) can be guided along a certain path or guided in a certain direction.

The above description is merely an illustrative explanation of the technical idea of the present invention, and various modifications and variations will be possible to those skilled in the art without departing from the essential characteristics of the present invention.

Accordingly, the embodiments disclosed in the present invention are not intended to limit the technical idea of the present invention, but are for illustrative purposes, and the scope of the technical idea of the present invention is not limited by these embodiments.

The scope of protection of the present invention should be interpreted in accordance with the claims below, and all technical ideas within the equivalent scope should be construed as being included in the scope of rights of the present invention.

1: Meander correction device
10: Unwinder
11: Applicator
12: Sensor unit
13: Control unit
14: Warning unit
15: control unit
16:EPC
S10: application step
S20: Detection phase
S30: Control phase
S31: Judgment stage
S32: Warning phase
S33: Control step

Claims (14)

Unwinder where the film is wound;
an applicator for applying a fluorescent material to one side of the film that is unwound and transported from the unwinder;
A sensor unit that detects the fluorescent substance; and
A skew correction device comprising a control unit that adjusts the moving path of the film according to information on the fluorescent material detected by the sensor unit.
In paragraph 1
Based on the position information of the fluorescent material detected by the sensor unit, the skew correction device further includes a control unit that determines whether the film is skewed according to a change in the position of the fluorescent material.
In paragraph 2
The applicator applies a plurality of fluorescent marks at regular intervals on the outer surface of the film along the moving path through the fluorescent material.
In paragraph 3
When the spacing between the plurality of fluorescent displays changes, the control unit determines meandering due to a stretching phenomenon of the film.
In paragraph 4
It further includes a warning unit that warns about the stretching phenomenon of the film,
When the control unit determines that meandering has occurred due to a tensile phenomenon of the film, the control unit operates the warning unit.
In paragraph 3
When the position of the plurality of fluorescent displays changes while the distance between the plurality of fluorescent displays is constant, the control unit determines that meandering that causes the film to deviate from the moving path has occurred.
In paragraph 6
When the control unit determines that the film has skewed away from the movement path, the control unit controls the operation of the adjusting unit.
In paragraph 1
Wherein the control unit includes at least one of a guide roll or a nip roll.
An application step of applying a fluorescent material to one side of a film in which the application part is unwound and transferred from an unwinder;
A detection step in which a sensor unit detects the fluorescent material; and
A skew correction method comprising a control step in which a control unit determines whether the film is skewed according to the fluorescent substance information detected by the sensor unit, and corrects the skew of the film.
In paragraph 9
In the application step, the applicator applies a plurality of fluorescent marks at regular intervals on the outer surface of the film along the moving path through the fluorescent material,
The control step is,
A skew correction method comprising a determination step in which the control unit determines the type of skew of the film through a change in the spacing between the plurality of fluorescent displays.
In paragraph 10
In the determination step, the control unit determines that meandering has occurred due to a stretching phenomenon of the film when the interval between the plurality of fluorescent displays changes.
In paragraph 11
The control step is,
When the control unit determines that meandering has occurred due to the stretching phenomenon of the film, the control unit further includes a warning step of operating a warning unit to warn about the stretching phenomenon of the film.
In paragraph 10
In the determination step, when the position of the plurality of fluorescent displays changes while the distance between the plurality of fluorescent displays is constant, the control unit determines that meandering that causes the film to deviate from the moving path has occurred. .
In paragraph 13
The control step is,
When the control unit determines that the film deviates from the movement path has occurred, the control unit further includes an adjustment step of operating a control unit that adjusts the movement path of the film.