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 production system for 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 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 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 for forming an electrode tab on the electrode material. The cutting process is a process for cutting the electrode material with the electrode tab formed thereon 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 including a punching member. The upper mold plate and the lower mold plate move to punch the electrode material to form the electrode tab. However, such a notching unit has a problem in that the maintenance cost of the mold is high. In addition, if the notching process is repeated to a certain extent, the mold and the punching member must be replaced.

[0006] To solve these problems, there is a method of using a laser for notching, but when using a laser for notching, there is a problem that dust sticks to the notching line and the scattered dust contaminates 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 production system for electrodes for secondary batteries including a notching portion that does not use a mold. [Means for solving the problem]

[0008] According to an embodiment, in a system for producing an electrode for a secondary battery, the system includes 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 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 a coated portion and an uncoated 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. The lower block includes an upper block that is connected to the lower block. and an air nozzle portion which is a gap between a lock and the upper block, the pusher includes a first pusher and a second pusher, the first pusher and the second pusher are spaced apart in a front-to-rear direction, the first pusher presses both the coated portion and the non-coated portion, and the second pusher presses only the coated portion, the first pusher includes 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 includes 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.

[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 forming the air nozzle portion, and the upper block may include a second surface forming the air nozzle portion. The first surface and the second surface may be inclined toward the outlet of the air nozzle such that an area of ​​the air nozzle portion decreases toward the outlet of the air nozzle.

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

[0012] The base has through slots formed in the areas at both ends of the base 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 for blowing out gas and dust generated when the laser notches the electrode, and a fume hood for sucking in and discharging the gas and dust blown outward by the air generating unit. Effect of the Invention

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

[0014] According to an embodiment, after notching, the cutting process cuts the electrode blank through a knife, 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 holds the coated and uncoated portions of the electrode together, thereby providing an advantageous effect of improving the quality of the notching.

[0015] According to an embodiment, the air nozzles are arranged on the pusher to provide an advantageous effect of easily separating the scrap from the electrode material after notching, particularly by spraying air on the rear and sides of the scrap to easily separate the scrap from the electrode material.

[0016] The embodiment provides an advantageous effect of easily removing scrap through a suction portion disposed adjacent to the base. According to the embodiment, it is possible to minimize the space in which dust adheres to the electrodes.

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

[0018] [Figure 1] 1 is a front view showing a secondary battery electrode production system according to an embodiment. [Diagram 2] FIG. 2 is a plan view of the electrode material. [Diagram 3] 1 is a view showing a notched portion. [Figure 4] 11 is a view showing a notched portion as viewed from the conveying direction side. [Diagram 5] 11 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. 4 is an exploded view of the first pusher. [Figure 9] 13 is a view showing a lower block of a first pusher. [Figure 10] 13 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. 4 is a plan view of the first pusher. [Figure 14] 4 is a view showing a state in which scrap is separated from an electrode material through an air nozzle portion. [Figure 15] 13 is a view illustrating a lower plate that is attached to and detached from a lower end base of a notching region of an electrode. [Figure 16] 1 is a diagram illustrating a structure of a lower plate. [Figure 17] 1 is a diagram illustrating a structure of a lower plate. [Figure 18] 1 is a diagram illustrating a structure of a lower plate. [Figure 19] 4 is a diagram for explaining removal of gas generated during laser notching. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[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 complete, and to fully convey the idea of ​​the present invention to those skilled in the art.

[0020] The terms used in this specification are used to describe specific embodiments and are not intended to limit the present invention. As used in this specification, the singular forms may include the plural forms unless the context clearly indicates otherwise. Also, as used in this specification, the words "comprise" and / or "comprising" specify the presence of a stated feature, number, step, operation, member, element, and / or group thereof, but do not exclude the presence or addition of one or more other features, numbers, operations, members, elements, and / or groups. As used in this specification, 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 parts, but it is clear that these members, parts, regions, layers and / or parts should not be limited by these terms. These terms do not imply a specific order, up or down, or superiority or inferiority, but are used only to distinguish one member, region or part from another member, region or part. Therefore, a first member, region or part described in detail below may refer to a second member, region or part 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 show schematic illustrations of embodiments of the present invention. In the drawings, for example, variations in the shapes shown are expected due 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 include, for example, variations in shapes caused by manufacturing.

[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 transport direction of the electrode material. 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, and the z-axis direction is the height direction of the secondary battery electrode production system.

[0024] As shown in Fig. 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 horizontally elongated band-shaped metal plate is supplied from the unwinding unit 10 at the entrance side. The electrode material (S0) is a horizontally elongated band-shaped metal plate, and may be made of copper when producing negative battery cells, and may be made of aluminum when producing positive battery cells.

[0025] The denser unit 20 guides the electrode material (S0) supplied from the unwinding section 10 to the notching section 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 may 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 one electrode.

[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 a non-coated portion (Sb). The non-coated portion (Sb) is disposed at the front and rear of the coated portion (Sa). The non-coated portion (Sb) disposed at the front of the coated portion (Sa) is cut by the notching portion 30, and the remaining area is formed as the electrode tab (Sc). Notching is performed along the notching line (NL) in the electrode material (S0). The notching line (NL) is divided into a front notching line (NL1) and a rear notching line (NL2). The front notching line (NL1) starts at the front edge of the electrode material (S0) to form the electrode tab (Sc). The rear notching line (NL2) starts at the rear edge of the electrode material (S0). The front notching line (NL1) includes a line that is bent twice in accordance with 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. As shown in FIG. Referring to Fig. 3, the notching unit 30 irradiates a laser onto the electrode material (S0) for notching. The laser has an advantage that it has a high energy density and can precisely process the electrode tab (Sc). The notching unit 30 includes a laser unit 100 and a pusher unit 200. The laser unit 100 irradiates a laser onto the electrode material (S0) along a notching line (NL). The pusher unit 200 serves to pressurize and adjust the electrode material (S0) during notching.

[0030] The laser unit 100 is disposed above the pusher unit 200 and can irradiate a laser from the top to the bottom. The laser unit 100 can include a driving device that moves the starting device on two or three axes in addition to an oscillation device. Thus, the laser unit 100 moves in the front-back direction (y), the transfer direction (x), and the height direction (z). Such a laser unit 100 can include a first laser unit 110 and a second laser unit 120. The first laser unit 110 can irradiate a laser along a front notching line (NL1). The second laser unit 120 can irradiate a laser along a rear notching line (NL2). The first laser unit 110 and the second laser unit 120 are disposed apart from each other based on the front-back direction (y).

[0031] The pusher unit 200 may include a pusher 210 and a driving unit 220. The pusher 210 contacts the electrode material (S0) to fix the electrode material (S0). The driving unit 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 disposed apart from each other based on 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 both descend and contact the electrode material (S0) at the same time.

[0032] Among such pushers 210, the first pusher 211 has the advantage of fixing both the coated portion (Sa) and the non-coated portion (Sb) of the electrode material (S0) together to improve the 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 is irradiated off the notching line (NL), which may cause 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 non-coated portion (Sb) that forms the electrode tab (Sc) together with the coated portion (Sa), the adhesion of the electrode material (S0) to the base (B) near the front notching line (NL1) can be greatly improved, ensuring the quality of notching.

[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 apart from the front notching line (NL1) by a predetermined distance. The second region (A2) is disposed near the rear notching line (NL2) and is spaced apart from the rear notching line (NL2) by a predetermined distance. Here, the first region (A1) may be formed across the coated portion (Sa) and the non-coated 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 in one go 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 cuts the electrode material S0 along the cutting line CL at one time to produce one electrode S1. Therefore, the cutting process can be performed quickly, thereby increasing the speed of the entire electrode production process.

[0036] FIG. 4 is a view showing the notching portion 30 as viewed from the conveying 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 for the pusher rod 223 to move 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 the guide 224. Between the shaft 222 and the pusher rod 223, various power transmission devices are arranged to convert the rotational motion of the shaft 222 into a linear reciprocating motion. The holder 225 is connected to the pusher rod 223 and rises and falls together when the pusher rod 223 rises and falls. The pusher 210 is disposed in the holder 225 and falls together when the pusher rod 223 descends to contact the electrode material (S0). An elastic member 226 is arranged between the holder 225 and the pusher 210. The elastic member 226 is a member that has a restoring force when it expands and contracts in the height direction (z). The elastic member 226 guides the electrode material (S0) so that it is closely 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 a suction hood 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 formed as a flat surface and contacts the first region (A1 in FIG. 2) of the electrode material (S0). The upper block 210B may be coupled to a 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 non-coated portion (Sb), it has the following characteristics.

[0041] The first pusher 211 may include a body 211a in contact with the coated portion (Sa), and an extension 211b in contact with the non-coated 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 set in consideration of 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 formed as a flat surface 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 has a straight line shape.

[0043] 8 is an exploded view of first pusher 211, FIG. 9 is a view showing lower block 210A of first pusher 211, and FIG. 10 is a view showing upper block 210B of 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 an 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 between 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 passage (U) that communicates with the air nozzle portion 250. Figure 11 is a side cross-sectional view of the first pusher 211 based on AA in Figure 6, Figure 12 is a side cross-sectional view of the second pusher 212 based on BB in Figure 6, Figure 13 is a plan view of the first pusher 211, and Figure 14 is a drawing showing the state of separating scrap (SR) from the electrode material (S0) through the air nozzle portion 250.

[0047] 11 and 12, the pusher 210 forms an air nozzle unit 250 in a gap between a lower block 210A and an 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 an 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 disposed opposite each other with a gap therebetween. The outlet of the air nozzle portion 250 is disposed 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 of the first surface (F1) with respect to the lower surface of the lower block 210A is smaller than the magnitude of the inclination of the second surface (F2) with respect to the lower surface of the lower block 210A. 11 to 14, the air nozzle unit 250 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 disposed in the body 211a along the front-rear direction (y) to spray air behind the scrap (SR), and the second air nozzle 252 is disposed in the extension portion 211b along the left-right direction (x) to spray air beside 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). Air is sprayed during notching by the first pusher 211 and the second pusher 212, respectively, so that the scrap (SR) can be easily separated 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 a lower end base of a notching region of an 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 the 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 against the base (B) by the pusher 210, the scrap (SR) generated by notching is also pressed against the base (B), making it difficult for the suction hood 241 to adsorb 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). A through slot 610 is 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 slot 610 passes through the through slot 610 and pushes the scraps (SR), so that 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 so that it can be inserted into the base B, and is structured to be inserted into the tip of the base B. Alternatively, the lower plate 600 may be structured such that one side and the bottom are open, the inside is hollow, and the tip of the base B can be covered 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 irradiated with the laser (L) 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 sticks to the notching line. Also, the scattered dust can contaminate the surface of the electrode and its surroundings. To prevent such problems from occurring, the area other than the minimum distance (0.5~2mm) for air injection can be covered 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 for blowing out gas and dust generated when the laser (L) notches the electrode (S0), and a fume hood 741 for sucking in and discharging the gas and dust blown outward by the air generating unit 730.

[0061] When the coating part of the electrode (S0) is coated with a laser (L), the active material of the electrode is burned by the laser (L) and smoke-like gas is generated, and if this gas sinks into the coating part 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 on the upper side of 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 suction hood 241 for removing scrap (SR), the suction force becomes weak and the scrap (SR) cannot be discharged smoothly, so a fume hood 741 for removing gas may be provided separately. The fume hood 741 is also configured to suck in air like the suction hood 241.

[0064] In addition, although the present invention has been described in terms of the electrode material (S0) being transported in a horizontal direction and the notching and cutting being performed in a vertical (top to bottom) direction, the present invention is not limited thereto, and it is self-evident that the present invention can also be applied to the electrode material (S0) being transported in a vertical (top to bottom or bottom to top) direction and the notching and cutting being performed in a horizontal direction.

[0065] Although 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 without departing from 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 set forth below, including any equivalents thereto.

[0067] In other words, it must 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 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 parts of a secondary battery electrode production system.

Claims

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 a laser onto the electrode material 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 non-coated 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 from each other 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 portion 211b that contacts the non-coated portion (Sb) and the coated portion (Sa). The air nozzle unit 250 includes a first air nozzle 251 arranged in the body 211a along the front-rear direction to spray air behind the scrap, and a second air nozzle 252 arranged in the extension portion 211b along the left-right direction to spray air next to the scrap.

2. The lower block 210A includes a first groove G1 formed in a concave shape on an upper surface thereof. The upper block 210B includes a second groove G2 formed in a concave shape on the lower surface thereof.

2. The electrode production system for secondary batteries according to claim 1, wherein when the upper block 210B and the lower block 210A are combined, the first groove (G1) and the second groove (G2) form an air flow path (U) communicating with the air nozzle portion 250.

3. 3. The electrode production system for a secondary battery as claimed in claim 2, wherein the lower block (210A) includes a first surface (F1) forming the air nozzle portion (250), and the upper block (210B) includes a second surface (F2) forming the air nozzle portion (250).

4. 4. The system for producing an electrode for a secondary battery according to claim 3, wherein the first surface (F1) and the second surface (F2) are formed to be inclined toward the outlet of the air nozzle portion (250) such that an area of ​​the air nozzle portion (250) decreases toward the outlet of the air nozzle portion (250).

5. 5. The electrode production system for secondary batteries according to claim 4, 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).

6. The pusher 210 fixes the electrode material to the base (B). The laser irradiation device further includes a lower plate 600 detachably coupled to both ends of the base (B) corresponding to the region to be irradiated with the laser.

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.

7. 7. The system for producing electrodes for secondary batteries according to claim 6, wherein through slots 610 are formed in regions of both ends of the base (B) corresponding to the region irradiated with the laser, to facilitate removal of scraps generated during notching.

8. an air generating unit 730 disposed above the pusher unit 200 for blowing 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 the gas and dust blown outward by the air generating unit (730).

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