KR20240027659A - Laser notching apparatus - Google Patents

Abstract

According to one aspect of the present invention, a first winding roll unit on which an unprocessed substrate is wound, a second winding roll unit that winds and recovers the notched substrate after being unwound from the first winding roll unit and transports the substrate, and the first winding roll unit. A first work backing roll part and a second work backing roll part located between the roll part and the second winding roll part with a notching work section positioned between them, a laser generating device that irradiates a laser to the substrate in the notching work section; A first upper backup roll part that is spaced apart on one side of the first work backing roll part and supports the upper surface of the substrate entering the notching work section, and a first upper back up roll part that is spaced apart on the other side of the second work backing roll part and is located in the notching work section. It includes a second upper backup roll part supporting the upper surface of the substrate exiting from the base, and the distance between the second upper backup roll part and the second work backing roll part is between the first upper back up roll part and the first work backing roll part. Provides a laser notching device with different distances.

Description

Laser notching device {LASER NOTCHING APPARATUS}

The present invention relates to a laser notching device, and more specifically, to a laser notching device that can improve the precision of the notching operation when notching electrode sheets of secondary batteries, etc. with a laser.

In recent years, the need for and demand for electric vehicles has been increasing in order to reduce the demand for portable electronic devices such as laptops, tablet PCs, and smartphones, as well as carbon emissions from fossil fuels.

Accordingly, the demand for secondary batteries is increasing significantly, and there is a trend to develop secondary batteries with high capacity and high performance.

Generally, a secondary battery has a structure that includes an electrode body consisting of a positive electrode and a negative electrode, a separator located between the positive electrode and the negative electrode, and an electrolyte solution or solid electrolyte injected into the battery case.

The electrode body of a secondary battery is manufactured in various shapes and sizes depending on the shape or size of the battery case.

Accordingly, the electrode body is cut into a preset shape and size through a notching process.

The electrode sheet is cut into a preset shape and size by a laser notching device, and at this time, the tab, which is the connecting part of the electrode, is cut together.

A conventional laser notching device unwraps the electrode sheet from a first winding roll on which the electrode sheet is wound, winds it on another second winding roll, and then cuts the electrode sheet into a preset shape and size with a laser device.

However, the conventional laser notching device shakes vertically in the transfer direction while recovering and transferring the electrode sheet wound on the first winding roll to the second winding roll, and therefore, when performing the notching process with the laser equipment, the electrode sheet There was a problem in that smooth and precise processing could not be achieved because the focal range of the irradiated laser was out of range.

Korean Patent Publication No. 2021-0069610 “Laser notching device with improved processing speed” (published on June 11, 2021)

The purpose of the present invention is to provide a laser notching device that can minimize shaking in the up and down directions that occurs during transport of the substrate by supporting the upper and lower parts of the substrate with the upper and lower guide portions in the notching work section of the substrate. there is.

Another object of the present invention is to minimize shaking in the up and down directions that occurs during transport of the substrate by slanting upward when the substrate enters the notching section of the substrate and discharging it at a downward angle when discharged after work in the notching section. The goal is to provide a laser notching device that can do this.

According to one aspect of the present invention, a first winding roll unit on which an unprocessed substrate is wound; and a second winding roll unit that winds and recovers the notched substrate after being unwound from the first winding roll unit and transports the substrate; and A first work backing roll part and a second work backing roll part, which are located between the first winding roll part and the second winding roll part, and a notching work section is located between them; and, a laser generation for irradiating a laser to the substrate in the notching work section. Equipment; and, a first upper backup roll part located spaced apart from one side of the first work backing roll part and supporting the upper surface of the substrate entering the notching work section; and, located spaced apart from the other side of the second work backing roll part and includes a second upper backup roll portion supporting the upper surface of the substrate exiting the notching work section, and the distance between the second upper backup roll portion and the second work backing roll portion is determined by the first upper backup roll portion and the first support roll portion. A laser notching device with different distances between working support roll parts is provided.

Here, the distance between the second upper backup roll part and the second work backing roll part may be smaller than the distance between the first upper backup roll part and the first work backing roll part.

Here, the laser notching device may further include an upper guide part and a lower guide part that are respectively located at the upper and lower parts of the substrate in the notching work section and cover the upper and lower surfaces of the substrate.

Here, the distance between the first work backing roll part and the second work backing roll part may correspond to the distance of the substrate disposed in the notching work section.

Here, the length of the upper guide part and the lower guide part may be smaller than the distance between the first work backing roll part and the second work backing roll part.

Here, the upper guide part and the lower guide part may include a laser passage hole through which a laser for a notching operation passes.

Here, the laser notching device may further include a laser damper portion disposed on a lower side of the lower guide portion.

Here, the first upper backup roll unit and the second upper backup roll unit may be located lower than the height of the first work backing roll part and the second work backing roll part.

The present invention greatly improves precision and work efficiency during laser notching work by supporting the upper and lower parts of the base material with the upper and lower guide parts in the notching work section of the base material to minimize shaking in the up and down directions that occurs during transport of the base material. It has an effect.

In addition, the present invention allows the substrate to enter the notching section at an upward angle, and discharges the substrate at a downward angle after work in the notching section, thereby minimizing the upward and downward shaking that occurs during transport of the substrate, thereby improving precision and work efficiency during laser notching. It has the effect of greatly improving.

1 is a schematic diagram showing an embodiment of a laser notching device according to the present invention.
Figure 2 is an enlarged view showing the notching work section in one embodiment of the laser notching device according to the present invention.
Figure 3 is a plan view showing an embodiment of the laser notching device according to the present invention.
Figure 4 is a schematic diagram illustrating the movement path of a laser beam for processing within a laser passing hole in an embodiment of the laser notching device according to the present invention.
Figure 5 is a front view showing one embodiment of an upper guide portion and a lower guide portion in one embodiment of the laser notching device according to the present invention.
Figure 6 is a front view showing another embodiment of the upper guide portion and the lower guide portion in one embodiment of the laser notching device according to the present invention.
Figure 7 is a front view showing another embodiment of the guide spacing adjustment part in one embodiment of the laser notching device according to the present invention.

Hereinafter, the present invention will be described in more detail.

A preferred embodiment of the present invention will be described in detail with the accompanying drawings as follows. Prior to the detailed description of the present invention, the terms or words used in the specification and claims described below should not be construed as limited to their ordinary or dictionary meanings. Therefore, the embodiments described in this specification and the configurations shown in the drawings are only the most preferred embodiments of the present invention and do not represent the entire technical idea of the present invention, so various equivalents that can replace them at the time of filing the present application It should be understood that variations and variations may exist.

Figure 1 is a schematic diagram showing an embodiment of the laser notching device according to the present invention, Figure 2 is an enlarged view showing the notching work section in an embodiment of the laser notching device according to the present invention, and Figure 3 is the present invention. This is a plan view showing an embodiment of the laser notching device according to the invention.

An embodiment of a laser notching device according to the present invention will be described in detail below with reference to FIGS. 1 to 3.

The laser notching device according to the present invention includes a first winding roll unit 100 on which the unprocessed substrate 1 is wound, and a second winding roll unit that winds and recovers the notched substrate 1 after it is unwound from the first winding roll unit 100. Includes (200).

As an example, the base material 1 is an electrode sheet 1a used as an electrode body in a secondary battery, and an embodiment of the laser notching device according to the present invention is a tab portion of the electrode, that is, a connection portion, in the electrode sheet 1a. Processing of the electrode tab 1b will be described below as an example.

It should be noted that, in addition to the electrode sheet 1a, the substrate 1 can be variously modified and implemented as a known substrate that is cut through a laser notching operation while being transferred between rolls.

The second winding roll unit 200 winds and recovers the electrode sheet 1a on which the electrode tab 1b has been processed through a laser notching operation, and the substrate 1 unrolled from the first winding roll unit 100, that is, the electrode sheet 1a ) is transferred.

The second winding roll unit 200 receives the rotational force of the rotary motor and rotates in the direction of winding the electrode sheet 1a to wind and recover the laser notched electrode sheet 1a that is unwound from the first winding roll unit 100.

A laser generator 300 is located between the first winding roll unit 100 and the second winding roll unit 200, and the laser generator equipment 300 is located between the first winding roll unit 100 and the second winding roll unit 200. It is located in the notching work section where laser notching work is performed.

As an example, the laser generator equipment 300 is located on the upper side of the electrode sheet 1a being transported in the notching work section and radiates a laser beam to the lower side to cut the electrode sheet 1a.

The laser generator equipment 300 is a known laser device that moves the laser generator to cut a pre-designed shape using a laser beam. It can be modified and implemented in various ways, so a more detailed description will be omitted.

In the notching work section, an upper guide portion 400 and a lower guide portion 500 are positioned on the upper and lower sides of the electrode sheet 1a, respectively.

The upper guide part 400 and the lower guide part 500 cover the upper and lower surfaces of the electrode sheet 1a in the notching work section to prevent the electrode sheet 1a from shaking up and down. Here, the up and down directions refer to the direction from the substrate 1 toward the laser generator 300 and the opposite direction, respectively.

The upper guide part 400 and the lower guide part 500 are located across the width direction of the electrode sheet 1a and guide the linear movement of the electrode sheet 1a therebetween, and the upper and lower guide parts 1a and 500 are positioned across the width direction of the electrode sheet 1a. Prevent shaking in the downward direction.

The electrode sheet 1a, that is, the base material 1, is transferred from the first winding roll unit 100 to the second winding roll unit 200, and laser notching is performed during the transfer. During transfer, it sloshes, that is, shakes in the up and down directions. It can happen.

If the electrode sheet 1a, that is, the substrate 1, is shaken in the up and down directions during the notching work section, the focus of the laser beam irradiated from the laser generator 300 is at the cutting location, that is, on the electrode sheet 1a. Because it is not positioned accurately, the notching work cannot be performed smoothly, and the precision of the notching work is lowered.

The upper guide part 400 and the lower guide part 500 support the upper and lower surfaces of the electrode sheet 1a in the notching work section and prevent the electrode sheet 1a from shaking in the up and down directions.

In addition, the upper guide part 400 and the lower guide part 500 cover the upper and lower surfaces of the electrode sheet 1a in the notching work section to further prevent the electrode sheet 1a from shaking left and right. Here, the left and right directions mean the width direction of the substrate 1 crossing the transport direction of the substrate 1. For example, the left and right directions are the directions opposite to the direction in which the electrode tab 1b is formed at the center of the substrate 1 based on the width direction of the substrate 1, which is perpendicular to the transfer direction of the substrate 1. Each means:

A laser passing hole 410 through which a laser beam for a notching operation passes is formed in the upper guide part 400 and the lower guide part 500.

The laser passing hole 410 is cut through a notching operation and remains on the substrate 1, that is, is formed into a shape corresponding to the notching shape, so that the notching operation through the laser beam can be cut into an accurate shape through the laser beam. make it possible

The laser passing hole 410 is formed in a shape corresponding to the electrode tab 1b, so that even if the laser beam is irradiated out of the cutting shape due to a malfunction of the laser generating equipment 300, it is blocked by the upper guide portion 400, thereby preventing the substrate 1. Incorrect cutting accidents can be prevented, and damage caused by malfunction of the laser generating equipment 300 can be minimized by performing notching work only within the hole.

In addition, a laser damper unit 510 that absorbs the laser beam that has passed through the substrate 1 and the laser passing hole 410 is located on the lower side of the lower guide unit 500.

The laser damper unit 510 absorbs the laser beam that has passed through the laser passage hole 410 and prevents the laser beam from damaging other structures or being reflected and causing injury to workers.

As an example, the laser damper unit 510 is a damper made of copper. In addition, since it can be implemented in various modifications using known materials that can absorb a laser beam, a more detailed description will be omitted.

In addition, the laser notching device according to the present invention further includes a guide gap adjusting unit 600 that adjusts the gap between the upper guide unit 400 and the lower guide unit 500.

The guide gap adjusting part 600 is rotatably coupled to the lower guide part 500 at its lower end, and is screwed through the upper guide part 400 to move the upper guide part 400 up and down by rotation. As an example, the spacing adjustment bolt member 610 is used.

As an example, the spacing adjustment bolt member 610 is located on both sides of the upper guide part 400 and the lower guide part 500, that is, on both sides of the electrode sheet 1a, which is the base material 1, and is rotated. The gap between the upper guide part 400 and the lower guide part 500 can be adjusted by moving the upper guide part 400 up and down.

Meanwhile, the laser notching device according to the present invention further includes a first work support roll unit 700 and a second work support roll unit 800, between which the notching work section is located.

An upper guide part 400 and a lower guide part 500 are positioned between the first work support roll part 700 and the second work support roll part 800.

The first work backing roll part 700 and the second work backing roll part 800 are positioned at the same height so that the electrode sheet 1a is horizontal in the notching work section, and the upper guide part 400 and the lower guide part 500 ) is guided so that the electrode sheet (1a) can pass horizontally between them.

The first upper support roll part 900 and the second support roll part for supporting the upper surface of the electrode sheet 1a, that is, the substrate 1, which are located spaced apart on one side of the first work support roll part 700 and enter the notching work section. It further includes a second upper backup roll portion 1000 that is positioned spaced apart on the other side of 800 and supports the upper surface of the electrode sheet 1a, that is, the substrate 1, which exits in the notching work section.

One side of the first work backing roll unit 700 is in the direction toward the first winding roll part 100, that is, the entrance side of the notching work section, and the other side of the second work backing roll part 800 is towards the second winding roll part 200. Make sure to indicate the direction you are facing, that is, the exit side of the notching work section.

The first upper backup roll unit 900 and the second upper backup roll unit 1000 are positioned lower than the height of the first work backing roll part 700 and the second work backing roll part 800 to form the electrode sheet 1a, that is, the substrate ( 1) is inclined to the upper side and enters the notching work section, and in the notching work section, notching is performed while moving horizontally through the first work backing roll part 700 and the second work backing roll part 800, and after the notching work, it is inclined to the lower side and notched. Emitted from the work area.

Accordingly, the tension is effectively controlled to prevent shaking of the electrode sheet 1a during the laser notching operation, that is, in the notching work section, and to enable precision processing during the laser notching operation of the electrode sheet 1a.

In more detail, the height of the first upper backup roll unit 900 is located higher than the height of the second upper backup roll unit 1000, so that the entry angle α of the substrate 1 entering the notching work section is adjusted to the notching work section. It is formed lower than the discharge angle (β) of the substrate 1 that is discharged later.

That is, the entry angle (α) of the substrate 1 entering the notching work section is lower than the discharge angle (β) of the substrate 1 being discharged from the notching work section, but is 50 to 80% compared to the discharge angle (β). It can have an angle of

The entry angle (α) of the substrate 1 entering the notching work section may have an angle of 55 to 75% of the discharge angle (β) of the substrate 1 being discharged from the notching work section.

The entry angle (α) of the substrate 1 entering the notching work section may have an angle of 60 to 70% of the discharge angle (β) of the substrate 1 being discharged from the notching work section.

The entry angle (α) of the substrate 1 entering the notching work section is 50 to 80% of the exit angle (β), preferably 60 to 70%, so that the material is transported horizontally in the notching work section. By effectively controlling the tension of the substrate 1, shaking in the up and down directions is minimized, and the focus of the laser beam can be positioned consistently on the surface of the substrate 1.

In addition, the distance (d ₁ ) between the second upper backup roll unit 1000 and the second work backing roll unit 800 is greater than the distance (d ₂ ) between the first upper backup roll unit 900 and the first work backing roll unit 700. Because it is formed to be short, the tension of the electrode sheet 1a can be controlled more effectively.

In more detail, the distance (d ₁ ) between the second upper backup roll unit 1000 and the second work support roll unit 800 is the distance between the first upper backup roll unit 900 and the first work support roll unit 700 (d ₂ ). It can have a distance of 60 to 95%.

The distance (d ₁ ) between the second upper backup roll unit 1000 and the second work support roll unit 800 is 70 ~ compared to the distance (d ₂ ) between the first upper backup roll part 900 and the first work support roll unit 700 You can have a distance of 90%.

The distance (d ₁ ) between the second upper backup roll unit 1000 and the second work support roll unit 800 is 80 ~ compared to the distance (d ₂ ) between the first upper backup roll part 900 and the first work support roll unit 700. You can have a distance of 90%.

The distance (d ₁ ) between the second upper backup roll unit 1000 and the second work backing roll unit ₈₀₀ is 60 ~ The entry angle (α) of the substrate 1 entering the notching work section and the discharge angle (β) of the substrate 1 being discharged from the notching work section by having a distance of 95%, preferably 80 to 90%. can be controlled at an appropriate angle, and the tension of the substrate (1) transported horizontally in the notching work section is effectively controlled to minimize shaking in the up and down directions, and the focus of the laser beam is kept constant on the surface of the substrate (1). so that it can be positioned properly.

In addition, the length (L 1 ) of the electrode sheet 1a covered by the upper guide portion 400 and the lower guide portion 500, that is, the length (L ₁ ) of the upper guide portion 400 and the lower guide portion ₅₀₀ ) is formed shorter than the distance (d ₃ ) between the first work backing roll part 700 and the second work backing roll part 800, but the distance between the first work backing roll part 700 and the second work backing roll part 800 ( It can have a length of 30 to 90% compared to d ₃ ).

The length (L 1 ) of the electrode sheet (1a) covered by the upper guide part 400 and the lower guide part 500, that is, the length (L ₁ ) of the upper guide part 400 and the lower guide part ₅₀₀ is It may have a length of 40 to 65% of the distance (d ₃ ) between the first work support roll part 700 and the second work support roll part 800.

The length (L 1 ) of the electrode sheet (1a) covered by the upper guide part 400 and the lower guide part 500, that is, the length (L ₁ ) of the upper guide part 400 and the lower guide part ₅₀₀ is It may have a length of 50 to 60% of the distance (d ₃ ) between the first work support roll part 700 and the second work support roll part 800.

The upper guide part 400 and the lower guide part 500 have a length shorter than the distance of the notching work section located between the first work support roll part 700 and the second work support roll part 800 and serve as the first work support roll. It is positioned so as not to interfere with the roll unit 700 and the second work support roll unit 800 to support the upper and lower surfaces of the electrode sheet 1a to minimize shaking of the electrode sheet 1a in the up and down directions.

When the upper guide part 400 and the lower guide part 500 have a length of less than 30% of the distance (d ₃ ) between the first work backing roll part 700 and the second work backing roll part 800, the electrode sheet (1a) ) is too small to properly control the shaking of the electrode sheet 1a in the up and down directions.

In addition, if the upper guide part 400 and the lower guide part 500 have a length exceeding 90% of the distance (d ₃ ) between the first work backing roll part 700 and the second work backing roll part 800, It is too close to the backing roll part 700 for the first work and the backing roll part 800 for the second work, so the frictional force of the electrode sheet 1a and the support for the second work between the backing roll part 700 for the first work and the upper guide part 400 The friction force increases between the loam part and the lower guide part 500, and to resolve this, the gap between the first work support roll part 700 and the upper guide part 400 is widened, and the second work support roll part 800 and the lower guide are increased. Since the spacing between parts 500 needs to be widened, the overall size of the facility increases, resulting in a problem that requires a lot of space.

Accordingly, the upper guide part 400 and the lower guide part 500 are located in the center between the first work support roll part 700 and the second work support roll part 800, and the upper guide part 400 and the lower guide part 500 ) may have a length of 30 to 90%, preferably 50 to 60%, of the distance (d ₃ ) between the first work backing roll part 700 and the second work backing roll part 800.

The length (L ₁ ) of the upper guide part 400 and the lower guide part 500 is 30 to 90% of the distance (d ₃ ) between the first work support roll part 700 and the second work support roll part 800. , Preferably, by having a length of 50 to 60%, the friction force generated when the electrode sheet 1a passes through the upper guide part 400 and the lower guide part 500 is minimized, and the electrode sheet (1a) is used in the notching work section. 1a) shaking in the up and down directions can be controlled stably.

One embodiment of the laser notching device according to the present invention includes a first transfer guide roll part 1100 that guides the electrode sheet 1a unwound from the first winding roll part 100 to the first upper backup roll part 900, and a second upper support roll part 1100. It includes a second transfer guide roll unit 1200 that guides the electrode sheet 1a discharged through the support roll unit 1000 to the second winding roll unit 200.

Accordingly, the electrode sheet 1a unwound from the first winding roll unit 100 is guided to the first upper backup roll unit 900 through the first transfer guide roll unit 1100 and passes through the first upper backup roll unit 900 to perform the notching operation. The electrode sheet 1a, which enters the section and is discharged through the second upper backup roll unit 1000 after laser notching in the notching work section, is guided through the second transfer guide roll unit 1200 and is connected to the second winding roll unit 200. It can be smoothly wound and recovered.

The first transfer guide roll unit 1100 and the second transfer guide roll unit 1200 may be arranged in plural numbers along the transfer path of the base material 1, that is, the electrode sheet 1a, which transfers the base material 1 in a roll-to-roll manner. It should be noted that various modifications can be made using the known transport structure.

Figure 3 is a plan view showing an example of processing the electrode tab 1b of the electrode sheet 1a using the laser notching device according to the present invention in more detail.

In one embodiment of the laser notching device according to the present invention, one edge of the electrode sheet 1a, that is, the edge in the width direction, is cut to a preset width while transporting the electrode sheet 1a, and a square-shaped electrode tab is formed on the cut edge. The electrode sheet 1a is cut so that (1b) protrudes, and the electrode tabs 1b are continuously processed at the widthwise edge of the electrode sheet 1a at a preset interval in the longitudinal direction of the electrode sheet 1a.

The laser passing hole 410 is a square having a width equal to the width cut from the width direction edge of the electrode sheet 1a, that is, a width equal to the width of the electrode tab 1b, and a length equal to the length of the electrode tab 1b. Take a hole as an example.

A laser passage hole 410 is formed in the upper guide part 400 and the lower guide part 500, having a square shape of the same size as the square electrode tab 1b, corresponding to the shape of the electrode tab 1b, The length (L ₂ ) of the laser passage hole 410 is formed to be smaller than the spacing (d ₄ ) of the electrode tab (1b), leaving the electrode tab (1b) within the laser passage hole (410) and extending to the very edge of the electrode sheet (1a). The cutting edge can be cut at a certain width, that is, the part other than the electrode tab (1b) can be cut.

The laser generator 300 radiates a laser beam into the laser passing hole 410 and cuts the edge to a certain width, cutting off the portion excluding the electrode tab 1b, leaving a square-shaped electrode tab 1b. The laser notching operation to form (1b) is performed continuously at preset intervals so that the electrode tabs (1b) protrude at regular intervals from the edge of the electrode sheet (1a) being transported.

Figure 4 is a schematic diagram illustrating the movement path of a laser beam for processing within the laser passing hole 410 in an embodiment of the laser notching device according to the present invention. Referring to Figure 4, the laser passing hole 410 moves in the width direction. The first side 411 coincides with the width direction edge of the unprocessed electrode sheet 1a, the second side 412 coincides with the cutting line of the electrode sheet 1a and is parallel to the first side 411, the first side A square hole including a third side 413 connecting one side of the first side 411 and the second side 412, and a fourth side 414 connecting the other side of the first side 411 and the second side 412. Take this as an example.

In addition, one side of the first side 411 and the second side 412 is in the direction toward the first winding roll unit 100, that is, the entrance side of the notching work section, and the first side 411 and the second side 412 ) is the direction toward the second winding roll unit 200, that is, the exit side of the notching work section.

Within the square-shaped laser passing hole 410, the laser beam is transmitted from the first vertex where the first side 411 and the third side 413 meet to the fourth point where the second side 412 and the fourth side 414 meet. After moving diagonally to the vertex, move straight from the fourth vertex along the second side 412 to the third vertex where the second side 412 and the third side 413 meet, and again from the third vertex to the first side. It moves diagonally to the fourth vertex where 411 and the fourth side 414 meet, and cuts the portion of the electrode sheet 1a excluding the electrode tab 1b to generate strip-shaped scrap.

One embodiment of the laser notching device according to the present invention processes the electrode tab 1b on the electrode sheet 1a during transfer from the first winding roll unit 100 to the second winding roll unit 200, so that the laser generating equipment 300 By moving the light source or internal optical member, the laser beam is moved diagonally from the first vertex to the fourth vertex, then moved linearly from the fourth vertex to the third vertex, and then diagonally moved from the third vertex to the second vertex. A band having a certain width is cut from the edge of the electrode sheet 1a, leaving only the square-shaped electrode tab 1b.

That is, one embodiment of the laser notching device according to the present invention moves the laser beam diagonally from the first vertex to the fourth vertex within the laser passing hole 410, moves it linearly from the fourth vertex to the third vertex, and then moves the laser beam diagonally from the fourth vertex to the third vertex. By moving diagonally from the third vertex to the second vertex, bands with a certain width are cut at regular intervals, leaving electrode tabs 1b between the cut bands.

Figure 5 is a front view showing an embodiment of the upper guide part 400 and the lower guide part 500 in one embodiment of the laser notching device according to the present invention. Referring to Figure 5, the upper guide part 400 and The spacing of the lower guide portion 500 is set to be larger than the thickness of the base material 1, that is, the electrode sheet 1a, the upper guide portion 400 is positioned to be spaced apart from the upper surface of the electrode sheet 1a, and the lower guide portion (500) is positioned to be spaced apart from the lower surface of the electrode sheet (1b).

The electrode base 1a may have an active material applied to the upper or lower surface, and at least one of the upper guide part 400 and the lower guide part 500 may be in contact with the upper or lower surface of the electrode sheet 1a. In this case, damage may occur to the active material layer applied to the electrode sheet 1a.

The electrode sheet 1a is connected to the upper guide part 400 and the lower guide part 500 by tension between the rollers located on both sides, that is, the first work support roll part 700 and the second work support roll part 800. It is transported in a spaced state between the upper guide part 400 and the lower guide part 500.

In addition, the spacing between the upper guide part 400 and the lower guide part 500 is adjusted through the guide spacing adjusting part 600 according to the thickness of the electrode sheet 1a, so that it can correspond to the electrode sheet 1a of various thicknesses. .

The guide gap adjusting unit 600 passes through the upper guide unit 400 and is screwed to the upper guide unit 400, and the lower end side is rotatably coupled to the lower guide unit 500. A gap adjusting bolt member 610 Includes.

The spacing between the upper guide part 400 and the lower guide part 500 can be adjusted by rotating the spacing adjustment bolt member 610.

The guide spacing adjusting unit 600 is located spaced apart from the upper side of the upper guide unit 400 and is mounted on the upper support 620, which rotatably supports the spacing adjusting bolt member 610, and the upper support 620, It may further include a bolt rotation motor 630 that moves the upper guide portion 400 up and down by rotating the spacing adjustment bolt member 610 in both directions.

The guide gap adjusting unit 600 electrically moves the upper guide unit 400 up and down by the operation of the bolt rotation motor 630 to control the working conditions during the laser notching operation, that is, the thickness of the substrate 1 or the thickness of the substrate 1. ) The gap between the upper guide part 400 and the lower guide part 500 can be adjusted according to working conditions such as the transfer speed.

Meanwhile, Figure 6 is a front view showing another embodiment of the upper guide part 400 and the lower guide part 500 in another embodiment of the laser notching device according to the present invention. Referring to Figure 6, the upper guide part 400 ) On the lower surface of the electrode sheet 1a, that is, a plurality of first rotating members 400a for transporting a plurality of substrates that roll in contact with the upper surface of the substrate 1 are protruding, and on the upper surface of the lower guide portion 500 A plurality of second rotating members 500a for transporting a plurality of substrates that roll in contact with the electrode sheet 1a, that is, the lower surface of the substrate 1, are positioned to protrude.

The first rotating member 400a for transporting the substrate and the second rotating member 500a for transporting the substrate may be wheel-shaped or may be a spherical ball bearing.

The first rotating member 400a for transporting the substrate and the second rotating member 500a for transporting the substrate roll in contact with the upper and lower surfaces of the electrode sheet 1a so that the electrode sheet 1a being transported is moved to the upper guide portion 400. It makes line contact between and the lower guide part 500 and allows smooth horizontal movement.

The first rotating member 400a for transporting the substrate and the second rotating member 500a for transporting the substrate are in contact with the electrode sheet 1a between the upper guide part 400 and the lower guide part 500 to form the electrode sheet 1a. ) prevents shaking in the up and down directions, and allows the electrode sheet 1a to be smoothly moved linearly between the upper guide part 400 and the lower guide part 500 in a horizontal position.

The electrode sheet 1a is in contact with the first rotating member 400a for transferring the substrate and the second rotating member 500a for transferring the substrate between the upper guide part 400 and the lower guide part 500 without shaking. By moving horizontally, the focus of the laser beam on the surface can be maintained.

At least one first and second rotating member 400a and 500a may be provided based on the direction perpendicular to the transport direction of the electrode sheet 1a, that is, the width direction of the substrate 1. In addition, based on the direction, each of the first and second rotating members 400a and 500a may be provided in plural numbers, and the plurality of first rotating members 400a may be arranged at equal intervals from each other on the electrode sheet 1a. You can. Additionally, the plurality of second rotating members 500a may be arranged at equal intervals from each other on the electrode sheet 1a.

In addition, although not shown in the drawing, the first rotating member 400a and the second rotating member 500a may be disposed on an area corresponding to a partial area of the electrode sheet 1a. For example, the first rotating member 400a and the second rotating member 500a may be disposed in areas that do not overlap in the vertical direction with the active material disposed on the electrode sheet 1a.

For example, the active material may be disposed only on the upper surface of the electrode sheet 1a facing the first rotating member 400a. In this case, the first rotating member 400a may be provided in a different number from the second rotating member 500a. Additionally, the first rotating member 400a may be disposed at a different or partially corresponding position from the second rotating member 500a in the vertical direction.

Accordingly, the embodiment can prevent shaking of the substrate 1, prevent damage to the active material formed on the substrate 1, and perform a laser notching operation.

Therefore, one embodiment of the laser notching device according to the present invention can smoothly perform the laser notching of the electrode sheet 1a while moving the laser beam within the laser passing hole 410, and precisely form the electrode sheet 1a into a preset shape. Laser notching work can be performed.

Figure 7 is a front view showing another embodiment of the guide gap adjusting unit 600 in one embodiment of the laser notching device according to the present invention. Referring to Figure 7, the upper guide part 400 and the lower guide part 500 ) The guide spacing adjusting part 600, which adjusts the spacing, is erected and screwed through the lower guide part 500 and the upper guide part 400, and the spacing adjusting screw member 640 is screwed in opposite directions to each other, A screw support 650, which is positioned spaced apart on the lower side of the lower guide part 500 or spaced apart on the upper side of the upper guide part 400 and rotatably supports the spacing adjustment screw member 640, It includes a screw rotation motor 660 that is mounted on 650 and rotates the spacing adjustment screw member 640 in both directions.

The guide spacing adjusting unit 600 electrically rotates the spacing adjusting screw member 640 in either direction by operating the screw rotation motor 660 to adjust the upper guide portion 400 and the lower guide portion 500. The gap can be narrowed by moving them to face each other, and the gap can be widened by moving the upper guide part 400 and the lower guide part 500 in opposite directions.

The guide spacing adjusting unit 600 operates the screw rotation motor 660 to automatically adjust the spacing between the upper guide part 400 and the lower guide part 500 according to working conditions during laser notching.

As an example, the screw supporter 650 is positioned to be spaced apart from the lower side of the lower guide part 500 and is provided with a laser damper part 510.

The screw support 650 is provided with a laser damper unit 510 and can process the laser beam that has passed through the laser passing hole 410 by absorbing it into the laser damper unit 510.

The present invention supports the upper and lower parts of the base material (1) with the upper guide part 400 and the lower guide part 500 in the notching work section of the base material (1), so that the upper and lower directions generated during transportation of the base material (1) are By minimizing the shaking, precision and work efficiency can be greatly improved during laser notching work.

In addition, the present invention enters the substrate 1 into the notching work section at an upward angle, and discharges the substrate 1 at a downward angle after work in the notching section, thereby minimizing shaking in the up and down directions that occurs during transport of the substrate, thereby performing laser notching. Precision and work efficiency can be greatly improved during work.

It should be noted that the present invention is not limited to the above-described embodiments, and can be implemented with various changes without departing from the gist of the present invention, and these are included in the configuration of the present invention.

1: Base material 1a: Electrode sheet
1b: Electrode tab 100: First winding roll part
200: Second winding roll unit 300: Laser generating equipment
400: Upper guide part 400a: First rotating member for transporting the substrate
410: Laser passing hole 411: 1st side
412: 2nd side 413: 3rd side
414: 4th side 500: lower guide part
500a: Second rotating member for transporting materials 510: Laser damper unit
600: Guide spacing adjusting part 610: Spacing adjusting bolt member
620: Upper support 630: Bolt rotation motor
640: Spacing adjustment screw member 650: Screw support
660: Screw rotation motor 700: Support roll unit for first work
800: Second work support roll part 900: First upper support roll part
1000: Second upper support roll part 1100: First transfer guide roll part
1200: 2nd transfer guide roll unit

Claims (8)

A first winding roll unit on which an unprocessed substrate is wound;
a second winding roll unit that winds and recovers the notched substrate after being unwound from the first winding roll unit and transports the substrate;
A first work support roll part and a second work support roll part located between the first winding roll part and the second winding roll part, and a notching work section is located between them;
Laser generating equipment that irradiates a laser to the substrate in the notching work section;
a first upper support roll part located at a distance from one side of the first work support roll part and supporting the upper surface of the substrate entering the notching work section; and
A second upper backup roll portion is located spaced apart from the other side of the second work support roll portion and supports the upper surface of the substrate exiting the notching work section,
The distance between the second upper backup roll part and the second work backing roll part is different from the distance between the first upper backup roll part and the first work backing roll part. According to paragraph 1,
A laser notching device wherein the distance between the second upper backup roll part and the second work backing roll part is smaller than the distance between the first upper backup roll part and the first work backing roll part. According to paragraph 1,
The laser notching device further includes an upper guide part and a lower guide part that are respectively located above and below the substrate in the notching work section and cover the upper and lower surfaces of the substrate. According to paragraph 3,
The distance between the first work backing roll part and the second work backing roll part corresponds to the distance of the substrate disposed in the notching work section. According to clause 4,
The length of the upper guide part and the lower guide part is smaller than the distance between the first work backing roll part and the second work backing roll part. According to paragraph 3,
A laser notching device, wherein the upper guide part and the lower guide part include a laser passage hole through which a laser for notching work passes. According to clause 6,
A laser notching device further comprising a laser damper portion disposed on a lower side of the lower guide portion. According to paragraph 1,
The first upper backup roll part and the second upper backup roll part are located lower than the height of the first work backing roll part and the second work backing roll part.