Secondary battery electrode production system

Abstract

In an embodiment of the present invention, the notching portion includes a laser portion that irradiates a laser onto the electrode material along the notching line, and a pusher portion disposed above the electrode material, the pusher portion includes a pusher that contacts the electrode material, and an air blower that is connected to the pusher, the pusher contacts a region of the electrode material excluding the notching line during notching to fix the electrode material, and fixes both the coated portion and the non-coated portion of the electrode material, the pusher includes a lower block that contacts the electrode material and an upper block that is connected to the lower block, and includes an air nozzle portion that is a gap between the lower block and the upper block, and the pusher includes a second block that contacts the electrode material and an upper block that is connected to the second block. a first pusher and a second pusher, the first pusher and the second pusher being spaced apart in a front-to-rear direction, the first pusher pressing both the coated portion and the non-coated portion and the second pusher pressing only the coated portion, the first pusher including a body in contact with the coated portion and an extension portion in contact with both the non-coated portion and the coated portion, and the air nozzle portion including a first air nozzle arranged in the front-to-rear direction on the body to spray air behind the scrap, and a second air nozzle arranged in the extension portion to spray air beside the scrap.

Description

[Technical Field]

[0001] The present invention relates to a system for producing electrodes for secondary batteries. [Background technology]

[0002] Generally, chemical batteries are batteries that contain a positive electrode, a negative electrode, and an electrolyte and generate electrical energy through a chemical reaction. They are divided into primary batteries, which are used as disposable batteries, and secondary batteries, which can be charged and discharged and can be used repeatedly.

[0003] The use of secondary batteries is gradually increasing due to their advantage of being able to be charged and discharged. Among these secondary batteries, lithium secondary batteries have a high energy density per unit weight and are widely used as power sources for electronic communication devices and high-power hybrid vehicles.

[0004] The electrodes used in such secondary batteries are used as the positive and negative electrodes of the battery and are used to electrically connect the battery to the outside of the battery. The electrode is formed through a notching process and a cutting process. The notching process is a process of forming electrode tabs on the electrode material. The cutting process is a process of cutting the electrode material with the electrode tabs to a predetermined length to produce a single electrode.

[0005] The notching unit that performs the notching process includes an upper mold plate and a lower mold plate, each including a punching member. The upper and lower mold plates move to punch the electrode material to form the electrode tab. However, such a notching unit has a problem in that the maintenance costs of the mold are high. Furthermore, if the notching process is repeated a certain number of times, the mold and punching member must be replaced.

[0006] To solve these problems, laser notching is used. However, when using a laser for notching, dust can stick to the notch line. In addition, the scattered dust can contaminate the surface of the electrode and its surroundings. Summary of the Invention [Problem to be solved by the invention]

[0007] An object of the present invention is to provide a system for producing electrodes for secondary batteries including a notched portion without using a mold. [Means for solving the problem]

[0008] In an embodiment, in a secondary battery electrode production system for producing a secondary battery electrode including a notching unit that notches an electrode material to form an electrode tab of the electrode, the notching unit includes a laser unit that irradiates the electrode material with a laser along a notching line, and a pusher unit disposed above the electrode material, the pusher unit including a pusher that contacts the electrode material and an air blower connected to the pusher, the pusher contacting a region of the electrode material excluding the notch line during notching to fix the electrode material, and fixing both a coated portion and an uncoated portion of the electrode material, the pusher including a lower block that contacts the electrode material and an upper block that is connected to the lower block, and an air nozzle portion that is a gap between the lock and the upper block, the pushers including a first pusher and a second pusher, the first pusher and the second pusher being spaced apart in the front-to-rear direction, the first pusher pushing both the coated portion and the uncoated portion, and the second pusher pushing only the coated portion, the first pusher including a body that contacts the coated portion and an extension that contacts both the uncoated portion and the coated portion, and the air nozzle portion including a first air nozzle arranged in the front-to-rear direction on the body to spray air behind the scrap, and a second air nozzle arranged in the extension and left-to-right direction to spray air beside the scrap.

[0009] The lower block may include a first groove formed in a concave shape on an upper surface, and the upper block may include a second groove formed in a concave shape on a lower surface, and when the upper block and the lower block are combined, the first groove and the second groove may form an air flow path communicating with the air nozzle.

[0010] The lower block may include a first surface that forms the air nozzle portion, and the upper block may include a second surface that forms the air nozzle portion. The first and second surfaces may be inclined toward the outlet of the air nozzle such that the area of ​​the air nozzle portion decreases toward the outlet.

[0011] The degree of inclination of the first surface (F1) relative to the lower surface of the lower block is smaller than the degree of inclination of the second surface relative to the lower surface of the lower block. The pusher fixes the electrode material to a base and further includes a lower plate detachably attached to both ends of the base corresponding to the area to be irradiated with the laser, and a through slot is formed on the upper surface of the lower plate to facilitate the discharge of scrap generated during notching.

[0012] The base has through slots formed at both ends of the base in areas corresponding to the area irradiated with the laser, to facilitate the discharge of scrap generated during notching. The laser cutting apparatus may further include an air generating unit disposed above the pusher unit and configured to blow out gas and dust generated when the laser notches the electrode, and a fume hood configured to suck in and exhaust the gas and dust blown out by the air generating unit. [Effects of the Invention]

[0013] According to an embodiment, notching is performed through a laser instead of a mold, which provides the advantage that the notched portion can be used almost permanently except for replacing consumable parts.

[0014] According to the embodiment, after notching, the electrode blank is cut through a knife in the cutting process, which provides an advantageous effect of increasing the production speed of the electrode. According to the embodiment, the electrode is tightly attached to the base at the notching line through the pusher that fixes the coated and uncoated portions of the electrode together, thereby providing an advantageous effect of improving the quality of the notching.

[0015] According to the embodiment, the air nozzles are arranged on the pusher, which provides an advantageous effect of easily separating the scrap from the electrode material after notching, particularly by spraying air on the rear and side of the scrap, which is advantageous in that the scrap can be easily separated from the electrode material.

[0016] According to the embodiment, an advantageous effect of easily removing scraps is provided through a suction portion disposed adjacent to the base. According to the embodiment, it is possible to minimize the space where dust adheres to the electrode.

[0017] According to the embodiment, scrap and dust can be removed and scattering of dust can be prevented. [Brief explanation of the drawings]

[0018] [Figure 1] 1 is a front view showing a secondary battery electrode production system according to an embodiment. [Figure 2] FIG. 2 is a plan view of the electrode material. [Figure 3] 10 is a view showing a notched portion. [Figure 4] 10 is a view showing a notched portion as viewed from the transfer direction side. [Figure 5] 10 is a view showing a notching portion as viewed from the front-rear direction. [Figure 6] FIG. 2 is a perspective view showing a first pusher. [Figure 7] FIG. 4 is a perspective view showing a second pusher. [Figure 8] FIG. 2 is an exploded view of the first pusher. [Figure 9] 10 is a view showing a lower block of a first pusher. [Figure 10] 10 is a view showing an upper block of a first pusher. [Figure 11] 7 is a side cross-sectional view of the first pusher taken along line AA in FIG. 6. [Figure 12] FIG. 7 is a side cross-sectional view of the second pusher taken along line BB in FIG. 6. [Figure 13]FIG. 2 is a plan view of the first pusher. [Figure 14] 10 is a view showing a state in which scrap is separated from an electrode material through an air nozzle portion. [Figure 15] 10 is a view illustrating a lower plate attached to and detached from a lower end base of a notched region of an electrode; [Figure 16] 1 is a diagram illustrating the structure of a lower plate. [Figure 17] 1 is a diagram illustrating the structure of a lower plate. [Figure 18] 1 is a diagram illustrating the structure of a lower plate. [Figure 19] 1 is a diagram illustrating removal of gas generated during laser notching. DETAILED DESCRIPTION OF THE INVENTION

[0019] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. The embodiments of the present invention are provided to more completely explain the present invention to those skilled in the art, and the following embodiments may be modified into various other forms, and the scope of the present invention is not limited to the following embodiments. Rather, these embodiments are provided to make the present disclosure more complete and thorough, and to fully convey the concept of the present invention to those skilled in the art.

[0020] The terms used herein are used to describe particular embodiments and are not intended to limit the present invention. As used herein, the singular forms "a," "an," and "the" can include the plural forms unless the context clearly dictates otherwise. Also, as used herein, the words "comprise" and / or "comprising" specify the presence of a stated shape, number, step, operation, member, element, and / or group thereof, but do not exclude the presence or addition of one or more other shapes, numbers, operations, members, elements, and / or groups. As used herein, the term "and / or" includes any one and any combination of one or more of the listed items.

[0021] In this specification, terms such as "first" and "second" are used to describe various members, regions, and / or sections, but it is clear that these members, parts, regions, layers, and / or sections should not be limited by these terms. These terms do not imply a particular order, hierarchy, or superiority or inferiority, but are used only to distinguish one member, region, or section from another. Therefore, a first member, region, or section described in detail below may refer to a second member, region, or section without departing from the teachings of the present invention.

[0022] Hereinafter, embodiments of the present invention will be described with reference to the drawings, which schematically illustrate embodiments of the present invention. In the drawings, variations in the shapes shown are expected due, for example, to manufacturing techniques and / or tolerances. Therefore, embodiments of the present invention should not be construed as being limited to the specific shapes of regions shown herein, but should also include variations in shapes that occur during manufacturing, for example.

[0023] The secondary battery electrode production system is a device for automatically and continuously producing electrodes used in secondary batteries. 1 is a front view showing a secondary battery electrode production system according to an embodiment. In the drawing, the x-axis direction is the longitudinal direction of the secondary battery electrode production system and indicates the direction in which the electrode material is transferred. In the drawing, the y-axis direction is the front-rear direction of the secondary battery electrode production system and indicates the same direction as the width direction of the electrode material. The z-axis direction is the height direction of the secondary battery electrode production system.

[0024] As shown in Figure 1, the system for producing electrodes for secondary batteries according to the embodiment includes an unwinding unit 10, a denser unit 20, a notching unit 30, a feeding device 40, a cutting unit 50, an aligning device, and a magazine 60. An electrode material (S0) formed of a strip-shaped metal plate extending horizontally is supplied from the unwinding unit 10 at the entrance side. The electrode material (S0) is a strip-shaped metal plate extending horizontally, and may be made of copper when producing a negative electrode battery, or aluminum when producing a positive electrode battery.

[0025] The denser unit 20 guides the electrode material (S0) supplied from the unwinding unit 10 to the notching unit 30, and adjusts the tension of the electrode material (S0) in response to changes in the supply speed of the electrode material (S0).

[0026] The notching section 30 forms an electrode tab (Sc in FIG. 2) on the supplied electrode material (S0). The feeding device 40 supplies the electrode material S0 notched by the notching unit 30 to the cutting unit 50. The feeding device 40 can pull the electrode material S0 at different speeds or tensions that are periodically repeated.

[0027] The cutting unit 50 cuts the supplied electrode material (S0) to produce one electrode. The aligning device and magazine 60 aligns and loads the electrodes one by one.

[0028] FIG. 2 is a plan view of the electrode material (S0). Referring to FIG. 2, the electrode material (S0) is divided into a coated portion (Sa) and an uncoated portion (Sb). The uncoated portions (Sb) are located on the front and rear sides of the coated portion (Sa). The uncoated portion (Sb) located on the front side of the coated portion (Sa) is cut by the notching portion 30, and the remaining area forms the electrode tab (Sc). Notching is performed on the electrode material (S0) along a notching line (NL). The notching line (NL) is divided into a front notching line (NL1) and a rear notching line (NL2). The front notching line (NL1) begins at the front edge of the electrode material (S0) and forms the electrode tab (Sc). The rear notching line (NL2) begins at the rear edge of the electrode material (S0). The front notching line (NL1) includes a line bent twice to correspond to the shape of the electrode tab (Sc), and the rear notching line (NL2) is a straight line formed in a straight line. A laser is irradiated along such notching lines (NL).

[0029] FIG. 3 is a diagram showing the notching portion 30. Referring to FIG. 3, the notching unit 30 irradiates a laser onto the electrode material (S0) for notching. The laser has the advantage of high energy density, allowing for precise processing of the electrode tab (Sc). The notching unit 30 includes a laser unit 100 and a pusher unit 200. The laser unit 100 irradiates the electrode material (S0) with a laser along the notching line (NL). The pusher unit 200 presses and adjusts the electrode material (S0) during notching.

[0030] The laser unit 100 is disposed above the pusher unit 200 and can emit a laser beam from above to below. The laser unit 100 may include a driving device that moves the launching device along two or three axes in addition to an oscillation device. Therefore, the laser unit 100 moves in the front-rear direction (y), the transfer direction (x), and the height direction (z). The laser unit 100 may include a first laser unit 110 and a second laser unit 120. The first laser unit 110 can emit a laser beam along a front notching line (NL1). The second laser unit 120 can emit a laser beam along a rear notching line (NL2). The first laser unit 110 and the second laser unit 120 are disposed apart from each other in the front-rear direction (y).

[0031] The pusher unit 200 may include a pusher 210 and a driver 220. The pusher 210 contacts the electrode material (S0) to fix it. The driver 220 is a device that moves the pusher 210 up and down in the height direction (z). The pusher 210 may include a first pusher 211 and a second pusher 212. The first pusher 211 and the second pusher 212 are spaced apart in the front-rear direction (y). The first pusher 211 may contact the electrode material (S0) near the front notching line (NL1). The second pusher 212 may contact the electrode material (S0) near the rear notching line (NL2). The first pusher 211 and the second pusher 212 may descend together and simultaneously contact the electrode material (S0).

[0032] Among these pushers 210, the first pusher 211 has the advantage of fixing both the coated portion (Sa) and the uncoated portion (Sb) of the electrode material (S0) together, thereby improving adhesion of the electrode material (S0) to the base (B). When notching using a laser, if the electrode material (S0) is not adhered to the base (B) and is raised, the laser may be irradiated off the notching line (NL), causing defects in the electrode tab (Sc). If the first pusher 211 fixes not only the coated portion (Sa) but also the remaining area of ​​the uncoated portion (Sb) that forms the electrode tab (Sc) together with the coated portion (Sa), it is possible to significantly improve adhesion of the electrode material (S0) to the base (B) near the front notching line (NL1), thereby ensuring notching quality.

[0033] From the viewpoint of the electrode material (S0), the electrode material (S0) may include a first region (A1) and a second region (A2) that contact the pusher 210. The first region (A1) and the second region (A2) are spaced apart in the width direction (y) of the electrode material (S0). The first region (A1) is disposed near the front notching line (NL1) and is spaced a predetermined distance from the front notching line (NL1). The second region (A2) is disposed near the rear notching line (NL2) and is spaced a predetermined distance from the rear notching line (NL2). Here, the first region (A1) may be formed across the coated portion (Sa) and the uncoated portion (Sb), and the second region (A2) may be formed only in the coated portion (Sa).

[0034] The length (L1) of the first region (A1) and the second region (A2), i.e., the length of the pusher 210, is at least greater than the length (L2) of one electrode (S1). This is because the minimum length of the notching line (NL) that can be advanced at one time when the transfer of the electrode material (S0) is stopped is set in consideration of the fact that the electrode material (S0) is cut by the cutting unit 50 immediately after notching to produce one electrode (S1). Here, the length is based on the transfer direction (x).

[0035] The cutting unit 50 physically cuts the electrode material S0 using a knife, unlike the notching unit 30. The cutting unit 50 produces one electrode S1 by cutting the electrode material S0 along the cutting line CL at a time. Therefore, the cutting process can be performed quickly, which can increase the speed of the entire electrode production process.

[0036] FIG. 4 is a view showing the notching portion 30 as viewed from the transfer direction (x), and FIG. 5 is a view showing the notching portion 30 as viewed from the front-rear direction (y). 4 and 5, the driving unit 220 of the pusher unit 200 may include a motor 221, a shaft 222, a pusher rod 223, a guide 224, and a holder 225.

[0037] The motor 221 provides a driving force to move the pusher rod 223 in the height direction (z). The shaft 222 is connected to the motor 221 and transmits the force of the motor 221 to the pusher rod 223. The pusher rod 223 moves in the height direction (z) along a guide 224. Various power transmission devices that convert the rotational motion of the shaft 222 into linear reciprocating motion are disposed between the shaft 222 and the pusher rod 223. The holder 225 is connected to the pusher rod 223 and moves up and down as the pusher rod 223 moves up and down. The pusher 210 is disposed in the holder 225 and moves down as the pusher rod 223 moves down, contacting the electrode material (S0). An elastic member 226 is disposed between the holder 225 and the pusher 210. The elastic member 226 has a restoring force when expanded or contracted in the height direction (z). The elastic member 226 guides the electrode material (S0) so that it is tightly attached to the base (B) by the pusher 210.

[0038] When the transport of the electrode material (S0) stops, the first pusher 211 and the second pusher 212 both descend and simultaneously contact the first region (A1) and the second region (A2) of the electrode material (S0), thereby fixing the electrode material (S0) to the base (B).

[0039] The suction unit 240 serves to suck and remove scraps (SR) generated during the notching process. The suction unit 240 includes suction hoods 241. When the suction unit 240 operates during the notching process, the suction hoods 241 are disposed at the front and rear of the base (B) in the front-rear direction (y) and can immediately suck in scraps (SR) of the electrode material (S0) separated from the front notching line (NL1) and scraps (SR) of the electrode material (S0) separated from the rear notching line (NL2).

[0040] FIG. 6 is a perspective view showing the first pusher 211. As shown in FIG. 6, the first pusher 211 may include a lower block 210A and an upper block 210B stacked and coupled to the lower block 210A. The lower surface of the lower block 210A is flat and contacts the first region (A1 in FIG. 2) of the electrode material (S0). The upper block 210B may be coupled to the holder 225. The size of the lower block 210A is smaller than that of the upper block 210B. Since the first pusher 211 contacts both the coated portion (Sa) and the uncoated portion (Sb), it has the following characteristics.

[0041] The first pusher 211 may include a body 211a that contacts the coated portion (Sa) and an extension 211b that contacts the uncoated portion (Sb) and the coated portion (Sa). The extension 211b extends from the front surface of the body 211a and protrudes forward. The size of the extension 211b may be appropriately determined taking into account the size of the electrode tab (Sc). The extension 211b may be formed on both the lower block 210A and the upper block 210B, or may be formed only on the lower block 210A.

[0042] FIG. 7 is a perspective view showing the second pusher 212. As shown in FIG. 7, the second pusher 212 may also include a lower block 210A and an upper block 210B stacked and coupled to the lower block 210A. The lower surface of the lower block 210A is flat and contacts the second region (A2 in FIG. 2) of the electrode material (S0). The upper block 210B may be coupled to the holder 225. Unlike the first pusher 211, the front edge of the second pusher 212 does not have an extension 211b and is straight.

[0043] 8 is an exploded view of the first pusher 211, FIG. 9 is a view showing a lower block 210A of the first pusher 211, and FIG. 10 is a view showing an upper block 210B of the first pusher 211. As shown in FIG.

[0044] 8 and 9, the lower block 210A includes a first groove G1. The first groove G1 is formed in a concave shape on the upper surface of the lower block 210A. The first groove G1 may be formed across the body 211a and the extension 211b.

[0045] 8 and 10, the upper block 210B includes a second groove G2. The second groove G2 is formed in a concave shape on the lower surface of the upper block 210B. The second groove G2 may be formed across the body 211a and the extension 211b.

[0046] When the lower block 210A and the upper block 210B are joined together, the first groove (G1) and the second groove (G2) form an air flow path (U) that communicates with the air nozzle portion 250. 11 is a side cross-sectional view of the first pusher 211 based on AA in FIG. 6, FIG. 12 is a side cross-sectional view of the second pusher 212 based on BB in FIG. 6, FIG. 13 is a plan view of the first pusher 211, and FIG. 14 is a diagram showing the state in which scrap (SR) is separated from the electrode material (S0) through the air nozzle portion 250.

[0047] 11 and 12, the pusher 210 has an air nozzle unit 250 formed in the gap between the lower block 210A and the upper block 210B. The air nozzle unit 250 is connected to the air blower 230, and sprays air supplied by the air blower 230 through the outlet of the air nozzle unit 250 during notching.

[0048] The first pusher 211 forms a U-shaped air nozzle portion 250, and the second pusher 212 forms a straight-line shaped air nozzle portion 250. 11, the lower block 210A of the first pusher 211 may include a first surface (F1) forming the air nozzle portion 250. The upper block 210B may include a second surface (F2) forming the air nozzle portion 250. The first surface (F1) and the second surface are arranged opposite each other with a gap therebetween. The outlet of the air nozzle portion 250 is arranged toward the notching line (NL).

[0049] The first surface (F1) and the second surface (F2) may be formed to be inclined toward the outlet of the air nozzle portion 250 so that the area of ​​the air nozzle portion 250 decreases toward the outlet of the air nozzle portion 250.

[0050] The magnitude of the inclination formed by the first surface (F1) with respect to the lower surface of the lower block 210A is smaller than the magnitude of the inclination formed by the second surface (F2) with respect to the lower surface of the lower block 210A. As shown in FIGS. 11 to 14, the air nozzle portion 250 、 The first pusher 211 may include a first air nozzle 251 and a second air nozzle 252. The first pusher 211 may include both the first air nozzle 251 and the second air nozzle 252, and the second pusher 212 may include only the first air nozzle 251.

[0051] The first air nozzle 251 is arranged in the body 211a along the front-rear direction (y) to spray air behind the scrap (SR), and the second air nozzle 252 is arranged in the extension part 211b along the left-right direction (x) to spray air next to the scrap (SR).

[0052] While the electrode material (S0) is irradiated with a laser, air is sprayed toward the notching line (NL) through the air nozzle unit 250. The scrap (SR) notched by the laser is pushed by the sprayed air and easily separated from the electrode material (S0). When notching is performed by the first pusher 211 and the second pusher 212, air is sprayed, making it possible to easily separate the scrap (SR) from the electrode material (S0). The separated scrap (SR) is immediately sucked into the suction hood 241 and removed.

[0053] In the case of the first pusher 211, air is sprayed from the rear and sides of the scrap (SR) so that the scrap (SR) can be easily separated from the electrode material (S0). FIG. 15 is a view illustrating a lower plate 600 that is attached to and detached from the lower end base of the notched region of the electrode, and FIGS. 16 to 18 are views illustrating the structure of the lower plate 600. As shown in FIG.

[0054] 12, as described above, scrap (SR) is generated in the process of notching the electrode material (S0) by laser. The scrap (SR) separated from the front notching line (NL1) and the rear notching line (NL2) is removed by the suction hood 241 of the suction unit 240.

[0055] Since the electrode material (S0) is pressed tightly against the base (B) by the pusher 210, the scrap (SR) generated by notching is also pressed tightly against the base (B), making it difficult for the suction hood 241 to suck up the scrap (SR).

[0056] To solve this problem, a lower plate 600 can be attached and detached to both ends of the base B corresponding to the area irradiated with the laser L. Through slots 610 are formed on the upper surface of the lower plate 600, and when the suction part 240 sucks the scraps SR, the air flowing through the lower end of the through slots 610 pushes the scraps SR while passing through the through slots 610, and the scraps SR are quickly discharged to the suction hood 241.

[0057] The lower plate 600 is box-shaped with one side open and the other side closed, with an empty interior, so that it can be inserted into the front end of the base B. Alternatively, the lower plate 600 may be hollow with one side and the bottom open, so that it can cover the front end of the base B from above.

[0058] Also, instead of the lower plate 600, through slots can be directly formed in the areas at both ends of the base (B) corresponding to the areas where the laser (L) is irradiated, to produce the same effect.

[0059] FIG. 19 is a diagram for explaining the removal of gas and dust generated during laser notching. When performing laser notching, dust generated during laser notching can stick to the notch line. In addition, the scattered dust can contaminate the surface of the electrode and its surroundings. To prevent this problem, it is recommended to cover the area outside the minimum distance (0.5 to 2 mm) for air injection to minimize the space where dust can stick to the electrode.

[0060] It may further include an air generating unit 730 disposed above the pusher 210, which blows out gas and dust generated when the laser (L) notches the electrode (S0), and a fume hood 741 which sucks in and exhausts the gas and dust blown out by the air generating unit 730.

[0061] When coating the electrode (S0) with a laser (L), the active material of the electrode is burned by the laser (L) and generates smoke-like gas. If this gas sinks into the coating of the electrode (S0), the electrode characteristics may change and the electrode may become defective. Or, dust may fly during the notching process.

[0062] The pusher 210 covers the electrode (S0), and air is discharged through the air nozzle part 250 of the pusher 210 to push the scrap (SR) and at the same time, gas and dust can be pushed outward. However, in case the gas and dust cannot be completely removed, an air generating part 730 is additionally provided above the pusher 210 to prevent the gas from affecting the coating part of the electrode and to prevent the scattering of dust.

[0063] In addition, if a large amount of air is sucked into the scrap (SR) removal suction hood 241, the suction force weakens and scrap (SR) cannot be discharged smoothly, so a separate gas removal fume hood 741 may be provided. The fume hood 741 is also configured to suck in air like the suction hood 241.

[0064] Furthermore, although the present invention has been described as the case where the electrode material (S0) is transported horizontally and notching and cutting are performed vertically (from top to bottom), it is not limited to this and it is obvious that the present invention can also be applied to the case where the electrode material (S0) is transported vertically (from top to bottom or from bottom to top) and notching and cutting are performed horizontally.

[0065] While specific embodiments of the secondary battery electrode production system of the present invention have been described above, it is obvious that various modifications are possible within the scope of the present invention.

[0066] Therefore, the scope of the present invention should be determined not only by the described embodiments, but also by the claims that follow, and by any equivalents to those claims.

[0067] In other words, it should be understood that the above-described embodiments are illustrative in all respects and not limiting, and the scope of the present invention is indicated by the claims below rather than by the detailed description, and all modifications and variations derived from the meaning and scope of the claims and their equivalent concepts should be interpreted as being included in the scope of the present invention. [Industrial Applicability]

[0068] The present invention is used in the field of manufacturing notched portions of a secondary battery electrode production system.

Claims

1. 1. A secondary battery electrode production system for producing a secondary battery electrode, the system including a notching portion for notching an electrode material to form an electrode tab of the electrode, The notching unit includes a laser unit 100 that irradiates the electrode material with a laser along a notching line, and a pusher unit 200 that is disposed above the electrode material, The pusher unit 200 includes a pusher 210 that contacts the electrode material, and an air blower 230 that is connected to the pusher 210. The pusher 210 contacts the area of ​​the electrode material excluding the notching line during notching to fix the electrode material, and fixes both the coated portion (Sa) and the uncoated portion (Sb) of the electrode material. The pusher 210 includes a lower block 210A that contacts the electrode material, an upper block 210B that is connected to the lower block 210A, and an air nozzle portion 250 that is a gap between the lower block 210A and the upper block 210B. The pusher 210 includes a first pusher 211 and a second pusher 212. The first pusher 211 and the second pusher 212 are spaced apart in the front-rear direction. The first pusher 211 pushes both the coated portion (Sa) and the non-coated portion (Sb), and the second pusher 212 pushes only the coated portion (Sa). The first pusher 211 includes a body 211a that contacts the coated portion (Sa) and an extension 211b that contacts the non-coated portion (Sb) and the coated portion (Sa). The air nozzle unit 250 of the first pusher 211 is U-shaped and includes a first air nozzle 251 arranged in the front-rear direction of the body 211a to spray air behind the scraps, and a second air nozzle 252 arranged in the extension portion 211b to spray air beside the scraps. The air nozzle portion 250 of the second pusher 212 is formed in a straight line shape. The lower block 210A includes a first groove G1 formed in a concave shape on the upper surface thereof. The upper block 210B includes a second groove G2 formed in a concave shape on the lower surface thereof. When the upper block 210B and the lower block 210A are coupled together, the first groove G1 and the second groove G2 form an air flow path U communicating with the air nozzle portion 250, The lower block 210A includes a first surface (F1) that forms the air nozzle portion 250, and the upper block 210B includes a second surface (F2) that forms the air nozzle portion 250. A secondary battery electrode production system, wherein the magnitude of the inclination of the first surface (F1) based on the lower surface of the lower block (210A) is smaller than the magnitude of the inclination of the second surface (F2) based on the lower surface of the lower block (210A).

2. The pusher 210 fixes the electrode material to the base (B). The laser beam irradiation device further includes a lower plate 600 detachably coupled to both ends of the base B corresponding to the laser irradiation area.

2. The system of claim 1, wherein a through slot is formed on an upper surface of the lower plate to facilitate removal of scraps generated during notching.

3. 3. The system for producing electrodes for secondary batteries according to claim 2, wherein through slots (610) are formed in regions of both ends of the base (B) corresponding to the region irradiated with the laser, thereby facilitating the removal of scraps generated during notching.

4. an air generating unit 730 disposed above the pusher unit 200 and configured to blow out gas and dust generated when the laser notches the electrode; 2. The system for producing electrodes for secondary batteries according to claim 1, further comprising: a fume hood (741) for sucking in and discharging gas and dust blown outward by the air generating unit (730).

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