Laser notching apparatus

Abstract

The technical concept of the present invention provides a laser notching apparatus comprising: a transfer unit for transferring an electrode sheet; a laser irradiation unit for irradiating the electrode sheet with a laser beam to notch the electrode sheet; a pattern jig configured to support the electrode sheet moving in a first direction; and a suction box on which the pattern jig is mounted and which has an inner space, wherein the pattern jig comprises a pattern hole which overlaps the electrode sheet in a second direction and through which the laser beam passes, and side suction holes which extend in a third direction intersecting the first direction and the second direction and guide outside air, sucked into the inner space of the suction box, in the third direction.

Description

Laser notching device

[0001] The present invention relates to a laser notching device.

[0002] This application claims the benefit of priority from Republic of Korea Patent Application No. 10-2024-0045859, filed April 4, 2024, and all contents of the document in that Republic of Korea Patent Application are incorporated herein by reference.

[0003] With technological advancements and growing demand for mobile devices, the demand for secondary batteries is also rapidly increasing. Among these, lithium secondary batteries are widely used as a power source for various mobile devices and electronic products due to their high energy density, high operating voltage, and excellent storage and lifespan characteristics. Recently, as the application areas for secondary batteries have expanded, the demand for higher-capacity secondary batteries has skyrocketed.

[0004] Typically, during the manufacturing of secondary batteries, electrode sheets are manufactured by coating a current collector with electrode active material, followed by a notching process to cut the electrode sheets into the desired shape. Notching processes include mold pressing and laser notching. While laser notching offers high productivity, it also requires reducing component contamination issues caused by foreign substances such as fumes or spatter.

[0005] The technical problem to be solved by the present invention is to provide a laser notching device.

[0006] In order to solve the above-described problem, the technical idea of ​​the present invention provides a laser notching device including: a transport unit for transporting an electrode sheet; a laser irradiation unit for irradiating the electrode sheet with a laser beam to notch the electrode sheet; a pattern jig configured to support the electrode sheet moving in a first direction; and a suction box having an internal space, wherein the pattern jig has a pattern hole that overlaps the electrode sheet in a second direction and through which the laser beam passes; and a side suction hole that extends in a third direction intersecting the first direction and the second direction and guides outside air sucked into the internal space of the suction box in the third direction.

[0007] In exemplary embodiments, the pattern jig includes a support surface supporting the electrode sheet and a side surface not overlapping the electrode sheet, and the side suction hole is characterized in that it extends in the third direction from the side surface of the pattern jig.

[0008] In exemplary embodiments, the inlet of the side suction hole on the side of the pattern jig is characterized in that it is spaced apart from the pattern hole in the first direction.

[0009] In exemplary embodiments, the inlet of the side suction hole is characterized in that it overlaps the pattern hole in the third direction.

[0010] In exemplary embodiments, the side suction hole has an inlet on the side of the pattern jig and an outlet opposite to the inlet, and the width of the outlet of the side suction hole and the width of the inlet of the side suction hole are different from each other.

[0011] In exemplary embodiments, the side suction hole is characterized by including a plurality of suction holes spaced apart from each other in the first direction.

[0012] In exemplary embodiments, the pattern jig is characterized in that the electrode sheet further includes a plurality of through holes overlapping in the second direction.

[0013] In exemplary embodiments, the suction box further comprises an air nozzle disposed within the inner space and configured to inject air in the first direction.

[0014] In exemplary embodiments, the suction box further comprises a suction pipe connected to an exhaust port; and a vacuum pump mounted on the suction pipe; wherein the exhaust port of the suction box is characterized in that it is spaced apart from the air nozzle in the first direction.

[0015] In exemplary embodiments, the pattern jig is characterized in that it further includes a support structure extending within the pattern hole and supporting the electrode sheet.

[0016] In exemplary embodiments, the suction box is characterized by including a suction slit through which outside air is sucked.

[0017] In exemplary embodiments, the pattern jig includes an overlapping region overlapping the electrode sheet and a non-overlapping region not overlapping the electrode sheet, and the side suction hole is characterized in that it is within the non-overlapping region of the pattern jig.

[0018] In exemplary embodiments, the pattern jig includes an overlapping region overlapping the electrode sheet and a non-overlapping region not overlapping the electrode sheet, and a part of the side suction hole is within the overlapping region of the pattern jig, and another part of the side suction hole is within the non-overlapping region of the pattern jig.

[0019] In exemplary embodiments, the pattern jig further includes an air nozzle disposed within the internal space of the suction box and configured to inject air in the first direction; a suction pipe connected to an exhaust port of the suction box spaced apart from the air nozzle in the first direction; and a vacuum pump mounted on the suction pipe; wherein the pattern jig further includes a support surface supporting the electrode sheet; a side surface not overlapping the electrode sheet; a plurality of through holes overlapping the electrode sheet in the second direction and each extending from the support surface; and a support structure extending within the pattern hole and supporting the electrode sheet; wherein the side suction hole is characterized in that it extends in the third direction from the side surface of the pattern jig.

[0020] According to exemplary embodiments of the present invention, the pattern jig has a side suction hole extending from its side, so that foreign matter flying out of the electrode sheet can be sucked into the suction box without affecting the transport of the electrode sheet, thereby suppressing external contamination of the laser notching device.

[0021] Furthermore, according to exemplary embodiments of the present invention, the pattern jig has side suction holes extending from its side surface, thereby preventing foreign matter from accumulating on the inner surface of the pattern jig without affecting the transport of the electrode sheet, thereby suppressing internal contamination of the pattern jig. Since internal contamination of the pattern jig is suppressed, the replacement cycle and / or cleaning cycle of the pattern jig can be increased, ultimately improving the productivity of the laser notching device.

[0022] The effects that can be obtained from the exemplary embodiments of the present invention are not limited to the effects mentioned above, and other effects not mentioned can be clearly derived and understood by those skilled in the art to which the exemplary embodiments of the present disclosure pertain from the following description. In other words, unintended effects resulting from practicing the exemplary embodiments of the present disclosure can also be derived by those skilled in the art from the exemplary embodiments of the present disclosure.

[0023] FIG. 1 is a perspective view showing a laser notching device according to exemplary embodiments of the present invention.

[0024] Fig. 2 is a cross-sectional view of a laser notching device along line Ⅱ-Ⅱ' of Fig. 1.

[0025] Fig. 3 is a cross-sectional view of a pattern jig of a laser notching device along line Ⅲ-Ⅲ' of Fig. 1.

[0026] FIG. 4 is a side view showing the laser notching device as viewed from the direction indicated by “IV” in FIG. 1.

[0027] FIG. 5 is a side view showing the laser notching device as viewed from the direction indicated by “V” in FIG. 1.

[0028] Fig. 6 is a cross-sectional view showing a pattern jig of a laser notching device along line VI-VI' of Fig. 5.

[0029] FIG. 7 is a cross-sectional view of a pattern jig of a laser notching device according to exemplary embodiments of the present invention.

[0030] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the attached drawings. Prior to this, it should be noted that the terms and words used in this specification and claims should not be construed as limited to their conventional or dictionary meanings. Based on the principle that the inventor can appropriately define the concepts of terms to best explain his or her invention, they should be interpreted in a way that aligns with the technical spirit of the present invention.

[0031] Accordingly, the embodiments described in this specification and the configurations illustrated in the drawings are merely the most preferred embodiments of the present invention and do not represent all of the technical ideas of the present invention. Therefore, it should be understood that there may be various equivalents and modified examples that can replace them at the time of filing this application.

[0032] In addition, when describing the present invention, if it is determined that a detailed description of a related known configuration or function may obscure the gist of the present invention, the detailed description is omitted.

[0033] Since the embodiments of the present invention are provided to more fully explain the present invention to those skilled in the art, the shapes and sizes of components in the drawings may be exaggerated, omitted, or schematically illustrated for clearer explanation. Accordingly, the sizes and proportions of each component do not fully reflect the actual sizes or proportions.

[0034]

[0035] (Example 1)

[0036] FIG. 1 is a perspective view showing a laser notching device (100) according to exemplary embodiments of the present invention. FIG. 2 is a cross-sectional view of the laser notching device (100) taken along line II-II' of FIG. 1. FIG. 3 is a cross-sectional view of a pattern jig (150) of the laser notching device (100) taken along line III-III' of FIG. 1. FIG. 4 is a side view showing the laser notching device (100) seen from the direction indicated by "IV" of FIG. 1. FIG. 5 is a side view showing the laser notching device (100) seen from the direction indicated by "V" of FIG.

[0037] Referring to FIGS. 1 to 5, a laser notching device (100) may be configured to perform a laser notching process on an electrode sheet (ES). The laser notching device (100) may be configured to perform a laser notching process of processing an electrode sheet (ES) into a desired shape using a laser beam (LB) in order to manufacture an electrode for a secondary battery.

[0038] Here, the electrode sheet (ES) may include a substrate layer and an electrode slurry layer applied to at least one of both surfaces of the substrate layer. The substrate layer may include, for example, copper or aluminum as a current collector. The electrode slurry layer may include a positive electrode active material slurry or a negative electrode active material slurry. The electrode sheet (ES) may include a holding portion, which is a region where the electrode slurry layer is applied, and a non-conductive portion, where the electrode slurry layer is not applied. In the holding portion of the electrode sheet (ES), the surface of the substrate layer may be covered by the electrode slurry layer and not exposed to the outside. In the non-conductive portion of the electrode sheet (ES), the surface of the substrate layer may be exposed. The non-conductive portion of the electrode sheet (ES) may be located at both edges along the width direction of the electrode sheet (ES). The laser notching device (100) may cut the non-conductive portion of the electrode sheet (ES) so that the electrode sheet (ES) has electrode tabs.

[0039] The laser notching device (100) may include a transport unit (110), a laser irradiation unit (120), a suction box (130), a vacuum pump (145), a pattern jig (150), and a blower (160).

[0040] The conveying unit (110) can convey the electrode sheet (ES) along a predetermined conveying path. The conveying unit (110) can include a supply roller (111) for supplying the electrode sheet (ES) and a winding roller (113) for winding the electrode sheet (ES) that has undergone a laser notching process. The supply roller (111) can be positioned at the starting point of the conveying path of the electrode sheet (ES). The supply roller (111) can store an electrode roll in which the electrode sheet (ES) is wound in a roll shape. The electrode sheet (ES) can be wound around the supply roller (111) in a roll shape by rotating the supply roller (111) in one rotational direction. In addition, the electrode sheet (ES) can be supplied to the conveying path by rotating the supply roller (111) in the opposite direction. The winding roller (113) can be positioned at the end point of the conveying path of the electrode sheet (ES). The winding roller (113) can wind and store the electrode sheet (ES) that has undergone a laser notching process in a roll form. When transporting the electrode sheet (ES), the supply roller (111) and the winding roller (113) can rotate in conjunction with each other. A plurality of guide rollers that guide the transport of the electrode sheet (ES) can be arranged in the transport path of the electrode sheet (ES) provided between the supply roller (111) and the winding roller (113).

[0041] The laser irradiation unit (120) can be placed on the transport path of the electrode sheet (ES) and can emit a laser beam (LB) toward the electrode sheet (ES). The laser irradiation unit (120) can include at least one light source that generates the laser beam (LB). The laser irradiation unit (120) can irradiate the laser beam (LB) to the electrode sheet (ES) to cut the electrode sheet (ES) into a predetermined shape. While the electrode sheet (ES) is transported along the transport path, the irradiation position of the laser beam (LB) emitted from the laser irradiation unit (120) moves, so that the electrode sheet (ES) can be cut into a predetermined shape.

[0042] The suction box (130) may be placed on one side of the electrode sheet (ES). The suction box (130) may overlap the electrode sheet (ES) in a second direction (D2) that is perpendicular or intersecting with the first direction (D1). The suction box (130) and the laser irradiation unit (120) may be spaced apart from each other with the electrode sheet (ES) therebetween. The suction box (130) may have an internal space (131) into which foreign substances such as fume or spatter generated during laser notching are sucked. The suction box (130) may be configured to capture foreign substances generated during laser notching together with a fume box (not shown) provided around the electrode sheet (ES). In addition, the suction box (130) may include suction slits (133, 134) that communicate with the internal space (131) and provide a passage through which outside air is sucked.

[0043] A vacuum pump (145) can be connected to a suction pipe (141) connected to an exhaust port of a suction box (130) and can exhaust the internal space (131) of the suction box (130). When the vacuum pump (145) depressurizes the internal space (131) of the suction box (130) through the suction pipe (141), gas and foreign substances in the internal space (131) of the suction box (130) can be discharged through the exhaust port of the suction box (130) to the suction pipe (141).

[0044] The pattern jig (150) can be placed on one side of the electrode sheet (ES) and detachably mounted on the suction box (130). The pattern jig (150) can have a roughly panel or plate shape. The pattern jig (150) can be mounted on the suction box (130) so as to cover the opening of the suction box (130). The pattern jig (150) can support the electrode sheet (ES) by suction. The electrode sheet (ES) can move in a first direction (D1) along the pattern jig (150). While the electrode sheet (ES) moves along the first direction (D1), one side of the electrode sheet (ES) can slide along the support surface (157) of the pattern jig (150).

[0045] The pattern jig (150) may include an overlapping region (191) that overlaps the electrode sheet (ES) and a non-overlapping region (193) that does not overlap the electrode sheet (ES). The overlapping region (191) of the pattern jig (150) may overlap the electrode sheet (ES) in a second direction (D2) that is perpendicular to or intersecting the first direction (D1). The non-overlapping region (193) of the pattern jig (150) may not overlap the electrode sheet (ES) in the second direction (D2) and may protrude from the outer edge of the electrode sheet (ES) in a third direction (D3) that is perpendicular to or intersecting both the first direction (D1) and the second direction (D2).

[0046] The overlapping area (191) of the pattern jig (150) may include a pattern hole (151), a support structure (152), and a plurality of through holes (153).

[0047] The pattern hole (151) of the pattern jig (150) is arranged in the irradiation area of ​​the laser beam (LB) emitted from the laser irradiation unit (120) and can be connected to the internal space (131) of the suction box (130). During laser notching, the laser beam (LB) emitted from the laser irradiation unit (120) can pass through the pattern hole (151). It can have a shape and area that can cover the irradiation area of ​​the laser beam (LB). When the vacuum pump (145) depressurizes the internal space (131) of the suction box (130) and the pattern hole (151), foreign matter generated during the process of the laser beam (LB) cutting the electrode sheet (ES) can be sucked into the internal space (131) of the suction box (130) through the pattern hole (151).

[0048] The support structure (152) may extend within the pattern hole (151). A single or multiple support structures (152) may be provided within the pattern hole (151). The support structure (152) may contact and support the electrode sheet (ES). The support structure (152) may support the electrode sheet (ES) to prevent or suppress deformation of the electrode sheet (ES) due to a suction force acting through the pattern hole (151).

[0049] The plurality of through holes (153) of the pattern jig (150) can each be connected to the internal space (131) of the suction box (130). Each through hole (153) can extend from the support surface (157) of the pattern jig (150) to the inner surface (158) of the pattern jig (150) and penetrate the pattern jig (150) in the second direction (D2). In the pattern jig (150), the plurality of through holes (153) can be arranged in a matrix form to have a plurality of rows and a plurality of columns. When the vacuum pump (145) depressurizes the internal space (131) of the suction box (130) and the plurality of through holes (153), a suction force that adsorbs the electrode sheet (ES) to the support surface (157) of the pattern jig (150) can be applied to the electrode sheet (ES).

[0050] The non-overlapping region (193) of the pattern jig (150) may include a side suction hole (155) configured to suck in outside air. The side suction hole (155) may be connected to the outside of the suction box (130) and the interior space (131) of the suction box (130). The pattern jig (150) has a side surface (159) spaced apart from the outer edge of the electrode sheet (ES) so as not to overlap with the electrode sheet (ES), and the side suction hole (155) may extend in a third direction (D3) from the side surface (159) of the pattern jig (150). The side suction hole (155) may guide outside air sucked into the interior space (131) of the suction box (130) in the third direction (D3). The side suction hole (155) may have an inlet and an outlet defined based on the suction direction of the outside air. The entrance of the side suction hole (155) is located on the side (159) of the pattern jig (150) and can be exposed to the external space of the pattern jig (150). The exit of the side suction hole (155) can be exposed to the internal space (131) of the suction box (130).

[0051] In exemplary embodiments, the side suction hole (155) may be entirely within the non-overlapping region (193) of the pattern jig (150) and may not overlap the electrode sheet (ES) in the second direction (D2). In other exemplary embodiments, a portion of the side suction hole (155) may be within the non-overlapping region (193) of the pattern jig (150), and another portion of the side suction hole (155) may be positioned within the overlapping region (191) of the pattern jig (150) and may overlap the electrode sheet (ES) in the second direction (D2).

[0052] When the vacuum pump (145) depressurizes the internal space (131) of the suction box (130), outside air can be sucked into the internal space (131) of the suction box (130) through the side suction hole (155). While outside air is sucked into the internal space (131) of the suction space through the side suction hole (155) of the pattern jig (150), foreign matter scattered around the side surface (159) of the pattern jig (150) can be sucked into the internal space (131) of the suction space. In addition, while outside air is sucked into the internal space (131) of the suction space through the side suction hole (155) of the pattern jig (150), an air current (AF of FIG. 6) flowing in a third direction (D3) can be formed around the inner surface (158) of the pattern jig (150). This airflow (AF) can prevent foreign substances from accumulating on the inner surface (158) of the pattern jig (150), the through holes (153) of the pattern jig (150), and the support structure (152).

[0053] The side suction hole (155) of the pattern jig (150) may include a plurality of suction holes spaced apart from each other. For example, the side suction hole (155) of the pattern jig (150) may include a plurality of suction holes spaced apart from each other along a first direction (D1). In exemplary embodiments, the side suction hole (155) of the pattern jig (150) may include at least one first suction hole (1551) that overlaps the pattern hole (151) in a third direction (D3) and at least one second suction hole (1553) that is arranged so as not to overlap the pattern hole (151) in the third direction (D3). The inlet of the first suction hole (1551) exposed to the side surface (159) of the pattern jig (150) may overlap the pattern hole (151) in the third direction (D3). The outside air introduced into the internal space (131) of the suction box (130) through the first suction hole (1551) can prevent foreign substances from accumulating in the pattern jig (150) around the pattern hole (151). The inlet of the second suction hole (1553) exposed on the side (159) of the pattern jig (150) can be spaced apart from the pattern hole (151) by a certain distance in the second direction (D2). The outside air introduced into the internal space (131) of the suction box (130) through the second suction hole (1553) can prevent foreign substances from accumulating in the pattern jig (150) around the through holes (153) of the pattern jig (150).

[0054] The blower (160) may be configured to inject air into the suction box (130). The blower (160) may inject air into the suction box (130) to form an airflow (163) in one direction within the suction box (130). The blower (160) may have an air nozzle (161) provided within the internal space (131) of the suction box (130). The air nozzle (161) may have a bar shape extending in a third direction (D3), and the injection port (162) may have a slit shape extending in the third direction (D3). The air nozzle (161) may be configured to inject air in the first direction (D1). The blower (160) may control the flow of foreign substances within the suction box (130) by adjusting the flow rate of air injected through the air nozzle (161).

[0055] The air nozzle (161) and the exhaust port of the suction box (130) can be spaced apart in the first direction (D1), and an air current (163) flowing in a direction generally parallel to the first direction (D1) can be formed within the suction box (130) by the air injected from the air nozzle (161). The direction of the air current (163) provided within the suction box (130) by the air nozzle (161) can be perpendicular to or intersecting with the direction of the outside air flowing along the side suction hole (155). Foreign matter within the suction box (130) can be quickly moved toward the exhaust port by the air current (163) formed within the suction box (130) by the air nozzle (161), thereby suppressing stagnation and accumulation of foreign matter within the suction box (130).

[0056]

[0057] FIG. 6 is a cross-sectional view showing a pattern jig (150) of a laser notching device (100) along line VI-VI' of FIG. 5.

[0058] Referring to FIGS. 1 to 6, when the vacuum pump (145) depressurizes the internal space (131) of the suction box (130), outside air is introduced into the internal space (131) of the suction box (130) through the side suction hole (155), and an air current (AF) flowing mainly in the third direction (D3) is formed around the inner surface (158) of the pattern jig (150). When the side suction hole (155) includes the first suction hole (1551) and the second suction hole (1553), an air current (AF) flowing along the inner surface (158) of the pattern jig (150) can be formed throughout the inner surface (158) of the pattern jig (150), and the formation of a local air current stagnation area around the inner surface (158) of the pattern jig (150) can be suppressed.

[0059] A laser notching device according to a comparative example may have suction holes in a region of the support surface of a pattern jig that does not overlap with the electrode sheet. In this case, foreign matter flying outward from the electrode sheet may be sucked into the suction box through the suction holes. However, there is a problem in that the electrode sheet shakes laterally due to the suction force acting through the suction holes. This shaking of the electrode sheet makes it difficult to cut the electrode sheet into a desired shape, thereby reducing the reliability of the secondary battery produced through the laser notching process.

[0060] According to exemplary embodiments of the present invention, the pattern jig (150) has a side suction hole (155) extending from its side, so that foreign matter flying out of the electrode sheet (ES) can be sucked into the suction box (130) without affecting the transport of the electrode sheet (ES), thereby suppressing external contamination of the laser notching device (100).

[0061] In addition, according to exemplary embodiments of the present invention, since the pattern jig (150) has a side suction hole (155) extending from its side, it is possible to prevent foreign substances from accumulating on the inner surface (158) of the pattern jig (150) without affecting the transport of the electrode sheet (ES), thereby suppressing internal contamination of the pattern jig (150). Since internal contamination of the pattern jig (150) is suppressed, the replacement cycle and / or cleaning cycle of the pattern jig (150) can be increased, and ultimately, the productivity of the laser notching device (100) can be improved.

[0062]

[0063] (Example 2)

[0064] FIG. 7 is a cross-sectional view of a pattern jig (150a) of a laser notching device according to exemplary embodiments of the present invention.

[0065] Referring to FIG. 7 together with FIG. 2, the width of the side suction hole (155a) of the pattern jig (150a) may be variable, and the width of the outlet of the side suction hole (155a) of the pattern jig (150a) and the width of the inlet of the side suction hole (155a) of the pattern jig (150a) may be different from each other. Here, the width of the side suction hole (155a) of the pattern jig (150a), the width of the outlet of the side suction hole (155a) of the pattern jig (150a), and the width of the inlet of the side suction hole (155a) of the pattern jig (150a) each refer to the width in the direction parallel to the first direction (D1). In some exemplary embodiments, the width of the side suction hole (155a) of the pattern jig (150a) may gradually decrease in a direction from its outlet toward its inlet, and the width of the outlet of the side suction hole (155a) may be greater than the width of the inlet of the side suction hole (155a). In some exemplary embodiments, the width of the side suction hole (155a) of the pattern jig (150a) may gradually increase in a direction from its outlet toward its inlet, and the width of the inlet of the side suction hole (155a) may be greater than the width of the outlet of the side suction hole (155a).

[0066] When the side suction hole (155a) of the pattern jig (150a) includes a plurality of suction holes, one of the plurality of suction holes may have a shape that gradually decreases in a direction from its outlet toward its inlet. In exemplary embodiments, the width of the first suction hole (1551a) of the pattern jig (150a) may gradually decrease in a direction from its outlet toward its inlet. The width of the outlet of the first suction hole (1551a) may be greater than the width of the inlet of the first suction hole (1551a). In exemplary embodiments, the width of the second suction hole (1553a) of the pattern jig (150a) may gradually decrease in a direction from its outlet toward its inlet. The width of the outlet of the second suction hole (1553a) may be greater than the width of the inlet of the second suction hole (1553a).

[0067] When the side suction hole (155a) of the pattern jig (150a) has a shape that gradually becomes smaller in the direction from the outlet to the inlet, the range of flow of outside air through the side suction hole (155a) is widened, so that the formation of a local airflow stagnation area around the inner surface (158) of the pattern jig (150a) can be effectively suppressed.

[0068] The present invention has been described in more detail through drawings and examples. However, the configurations described in the drawings or examples described in this specification are merely embodiments of the present invention and do not represent all of the technical ideas of the present invention. Therefore, it should be understood that various equivalents and modified examples may exist as of the time of this application.

Claims

1. A transport section for transporting electrode sheets; A laser irradiation unit that irradiates a laser beam onto the electrode sheet to notch the electrode sheet; A pattern jig configured to support the electrode sheet moving in the first direction; and A suction box having an internal space and equipped with the above pattern jig; Including, The above pattern jig is, A pattern hole overlapping the electrode sheet in the second direction and through which the laser beam passes; and A side suction hole extending in a third direction intersecting the first and second directions and guiding outside air sucked into the internal space of the suction box in the third direction; A laser notching device comprising:

2. In paragraph 1, The above pattern jig includes a support surface supporting the electrode sheet and a side surface not overlapping the electrode sheet, A laser notching device characterized in that the side suction hole extends in the third direction from the side surface of the pattern jig.

3. In paragraph 2, A laser notching device characterized in that the inlet of the side suction hole on the side of the pattern jig is spaced apart from the pattern hole in the first direction.

4. In paragraph 2, A laser notching device characterized in that the entrance of the side suction hole overlaps the pattern hole in the third direction.

5. In paragraph 2, The above side suction hole has an inlet on the side of the pattern jig and an outlet opposite to the inlet, A laser notching device characterized in that the width of the outlet of the side suction hole and the width of the inlet of the side suction hole are different from each other.

6. In paragraph 1, A laser notching device characterized in that the side suction hole includes a plurality of suction holes spaced apart from each other in the first direction.

7. In paragraph 1, A laser notching device characterized in that the pattern jig further includes a plurality of through holes overlapping in the second direction in the electrode sheet.

8. In paragraph 1, A laser notching device characterized in that it further comprises an air nozzle arranged within the internal space of the suction box and configured to spray air in the first direction.

9. In paragraph 8, A suction pipe connected to the exhaust port of the above suction box; and A vacuum pump mounted on the above suction pipe; Including more, A laser notching device, characterized in that the exhaust port of the suction box is spaced apart from the air nozzle in the first direction.

10. In paragraph 1, A laser notching device characterized in that the pattern jig extends within the pattern hole and further includes a support structure that supports the electrode sheet.

11. In paragraph 1, A laser notching device characterized in that the above suction box includes a suction slit through which outside air is sucked.

12. In paragraph 1, The above pattern jig includes an overlapping region overlapping the electrode sheet and a non-overlapping region not overlapping the electrode sheet, A laser notching device characterized in that the side suction hole is within the non-overlapping area of ​​the pattern jig.

13. In paragraph 1, The above pattern jig includes an overlapping region overlapping the electrode sheet and a non-overlapping region not overlapping the electrode sheet, A laser notching device, characterized in that a part of the side suction hole is within the overlapping area of ​​the pattern jig, and another part of the side suction hole is within the non-overlapping area of ​​the pattern jig.

14. In paragraph 1, An air nozzle arranged within the internal space of the suction box and configured to inject air in the first direction; A suction pipe connected to the exhaust port of the suction box spaced apart from the air nozzle in the first direction; and A vacuum pump mounted on the above suction pipe; Including more, The above pattern jig is, A support surface supporting the above electrode sheet; The side not overlapping the above electrode sheet; A plurality of through holes overlapping in the second direction on the electrode sheet and each extending from the support surface; and A support structure extending within the pattern hole and supporting the electrode sheet; Including more, A laser notching device characterized in that the side suction hole extends in the third direction from the side surface of the pattern jig.

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