Electrode notching apparatus and electrode notching method

Abstract

The present invention provides an electrode notching apparatus (10) comprising: a laser irradiation unit (100) for processing an electrode sheet (50) by irradiating a notching point (N) of the electrode sheet (50) with laser; a jig (200) including a first jig unit (210) and a second jig unit (220) which are disposed facing the laser irradiation unit (100) with the electrode sheet (50) in between, support the electrode sheet (50), and are spaced a predetermined distance apart from each other such that the laser that processes the electrode sheet (50) passes therebetween; a porous block (300) including a first section (310) and a second section (320) which are disposed between the first jig unit (210) and the second jig unit (220), are formed of a porous material, are spaced a predetermined distance apart from each other such that the laser that processes the electrode sheet (50) passes therebetween, and discharge a gas into the space therebetween; and a gas supply unit (400) for introducing the gas into the porous block (300).

Description

Electrode notching device and electrode notching method

[0001] This application claims the benefit of priority to Korean Patent Application No. 10-2023-0191911, dated December 26, 2023, and Korean Patent Application No. 10-2024-0009752, dated January 22, 2024, the entire contents of which are incorporated herein by reference.

[0002] The present invention relates to an electrode notching device and an electrode notching method, and more particularly, to an electrode notching device and an electrode notching method, which solve or alleviate the problem of damage or contamination of an electrode sheet due to accumulation or fixation of fume generated during notching on an object (jig) located near a notching point.

[0003] With the growing demand for mobile devices, electric vehicles, and other devices, the demand for secondary batteries is rapidly increasing. In particular, lithium secondary batteries, with their high energy density and voltage, are commercialized and widely used.

[0004] Typically, these lithium secondary batteries are manufactured by applying an electrode mixture containing an electrode active material, a conductive agent, a binder, etc., onto an electrode current collector, drying the mixture, manufacturing the electrode, laminating the manufactured electrode with a separator, and then embedding and sealing the electrode in a battery case together with an electrolyte.

[0005] At this time, the electrode is manufactured by forming an electrode tab on an electrode sheet including a holding portion coated with an electrode active material and a non-coated portion coated with an electrode active material through a notching process, and then cutting the electrode to a predetermined length.

[0006] In general, the electrode tab notching process is performed using a punch and a jig including a cutting portion having a shape corresponding to the electrode tab, and recently, in order to form electrodes with more precise dimensions, it is performed using a laser.

[0007] However, conventional electrode tab notching devices using lasers cause problems in that foreign substances such as fumes generated during notching accumulate or stick around the pattern hole of the pattern jig, causing damage or contamination of the electrode sheet.

[0008] Therefore, improvements to these problems are required.

[0009] The present invention has been devised to solve the above-described problem, and the purpose of the present invention is to provide an electrode notching device and an electrode notching method that solve or alleviate the problem of foreign substances such as fumes generated during notching accumulating or sticking to a jig located near a notching point, thereby damaging or contaminating the electrode sheet.

[0010] The purpose of the present invention is to provide an electrode notching device and an electrode notching method that can extend the cleaning cycle of a jig and maintain an optimal environment set for notching for a long period of time.

[0011] The purpose of the present invention is to provide an electrode notching device and an electrode notching method that improve the productivity, quality, and quality uniformity of electrodes and secondary batteries and reduce the maintenance cost of the electrode notching device.

[0012] The purpose of the present invention is to provide an electrode notching device and an electrode notching method that can process an electrode sheet correctly and effectively even when a porous block is placed between jigs.

[0013] The purpose of the present invention is to provide an electrode notching device and an electrode notching method that discharge gas uniformly and stably from a porous block.

[0014]

[0015] The technical objectives of the present invention are not limited to the purposes mentioned above. Other objectives and advantages of the present invention not mentioned above can be understood through the following description and will be more clearly understood through the embodiments of the present invention. Furthermore, it will be readily apparent that the objectives and advantages of the present invention can be realized by the means and combinations thereof set forth in the claims.

[0016] In order to solve the above-described problem, the present invention provides an electrode notching device (10) including a laser irradiation unit (100), a jig (200), a porous block (300), and a gas supply unit (400).

[0017] The above laser irradiation unit (100) can process the electrode sheet (50) by irradiating the laser to the notching point (N) of the electrode sheet (50).

[0018] The above jig (200) can be placed facing the laser irradiation unit (100) with the electrode sheet (50) interposed therebetween.

[0019] The above jig (200) can support the electrode sheet (50).

[0020] The above jig (200) may include a first jig portion (210) and a second jig portion (220).

[0021] The first jig part (210) and the second jig part (220) can be arranged at a predetermined interval so that the laser that processes the electrode sheet (50) passes between them.

[0022] The above porous block (300) can be placed facing the laser irradiation unit (100) with the electrode sheet (50) interposed therebetween.

[0023] The above porous block (300) can be placed between the first jig part (210) and the second jig part (220).

[0024] The above porous block (300) can be formed of a porous material.

[0025] The above porous block (300) may include a first portion (310) and a second portion (320).

[0026] The first portion (310) and the second portion (320) may be arranged at a predetermined interval so that the laser that processes the electrode sheet (50) passes between them.

[0027] The first part (310) and the second part (320) can discharge gas into the space between the first part (310) and the second part (320).

[0028] The above gas supply unit (400) can introduce gas into the porous block (300).

[0029] In one embodiment, the first portion (310) and the second portion (320) may cover the end faces of the first jig portion (210) and the second jig portion (220), respectively.

[0030] In one embodiment, the first portion (310) and the second portion (320) can contact the tip portions of the first jig portion (210) and the second jig portion (220), respectively.

[0031] In one embodiment, the first jig portion (210) and the second jig portion (220) can be in contact with the electrode sheet (50).

[0032] The first portion (310) and the second portion (320) may be placed in contact with or adjacent to the electrode sheet (50).

[0033] In one embodiment, the width (D2) of the section where the electrode sheet (50) is not supported between the first jig portion (210) and the second jig portion (220) may correspond to the width (D1) between the first portion (310) and the second portion (320).

[0034] In one embodiment, one side of the first jig portion (210) and the second jig portion (220) that come into contact with the electrode sheet (50) and one side of the first portion (310) and the second portion (320) that come into contact with or are adjacent to the electrode sheet (50) may all together form a single spherical surface or a single plane.

[0035] In one embodiment, pores formed on one side (S1, S2) of the first portion (310) and the second portion (320) or on one side (S1, S2) of the first portion (310) and the second portion (320) that are in contact with or facing the electrode sheet (50) can be blocked to prevent gas from being discharged toward the electrode sheet (50).

[0036] In one embodiment, it may further include a suction port (512) for sucking in foreign matter and gas.

[0037] The above laser irradiation unit (100) and electrode sheet (50) can be placed on one side of the first jig unit (210), the second jig unit (220), the first section (310), and the second section (320) in the first direction.

[0038] The first jig part (210) and the second jig part (220) can be placed on one side and the other side of the second direction intersecting the first direction, respectively.

[0039] The first part (310) and the second part (320) can be placed on one side and the other side of the second direction, respectively.

[0040] The above suction port (512) can be positioned adjacent to the notching point (N), the first portion (310), and the second portion (320).

[0041] The above suction port (512) can be placed on one or the other side of the third direction intersecting the first and second directions of the notching point (N), the first portion (310) and the second portion (320).

[0042] In one embodiment, the porous block (300) may include a third portion (330) and a fourth portion (340).

[0043] The above third part (330) can be combined with the above first part (310).

[0044] The third section (330) can introduce gas into the first section (310).

[0045] The above fourth part (340) can be combined with the above second part (320).

[0046] The above fourth section (340) can introduce gas into the second section (320).

[0047] The sizes of the third portion (330) and the fourth portion (340) may be larger than the sizes of the first portion (310) and the second portion (320), respectively.

[0048] The above gas supply unit (400) can supply gas to the third section (330) and the fourth section (340).

[0049] In one embodiment, the gas supply unit (400) may include a gas supply device, a gas supply pipe (410), and a gas receiving space (420).

[0050] The above gas supply pipe (410) can be connected at one end to the gas supply device.

[0051] The above gas receiving space (420) can be connected to the third section (330), the fourth section (340) and the other end of the gas supply pipe (410).

[0052] The above gas receiving space (420) may be larger than the first portion (310) and the second portion (320).

[0053] The gas supplied from the above gas supplier can be introduced into the third section (330) and fourth section (340) through the gas supply pipe (410) and gas receiving space (420).

[0054] In one embodiment, the third portion (330) and the fourth portion (340) may be positioned spaced apart from each other.

[0055] The above gas supply pipe (410) may include a first supply pipe (412) and a second supply pipe (414).

[0056] The first supply pipe (412) and the second supply pipe (414) can each be connected at one end to the gas supply device.

[0057] The first supply pipe (412) and the second supply pipe (414) can be arranged spaced apart from each other.

[0058] The above gas receiving space (420) may include a first receiving space (422) and a second receiving space (424).

[0059] The above first receiving space (422) can be connected to the other end of the first supply pipe (412) and the third portion (330).

[0060] The above second receiving space (424) can be connected to the other end of the second supply pipe (414) and the fourth section (340).

[0061] The above second receiving space (424) can be formed separately from the above first receiving space (422).

[0062] In one embodiment, the laser irradiation unit (100) and the electrode sheet (50) may be placed on one side of the first jig unit (210), the second jig unit (220), the first section (310), and the second section (320) in the first direction.

[0063] The first portion (310) and the second portion (320) may be positioned on one side and the other side of the second direction intersecting the first direction, respectively.

[0064] The third part (330) and the fourth part (340) may be respectively positioned on the other side of the first part (310) and the second part (320) in the first direction.

[0065] The first receiving space (422) and the second receiving space (424) may be respectively arranged on one side of the third portion (330) in the second direction and on the other side of the fourth portion (340) in the second direction.

[0066] In one embodiment, the gas supply unit (400) may include a flow control unit.

[0067] The above flow control unit can be connected to the gas supply unit or gas supply pipe (410).

[0068] In one embodiment, at least a portion of the outer surface of the third portion (330) and the fourth portion (340), excluding the first portion that is connected to the first portion (310) and the second portion (320) respectively and the second portion that is connected to the gas supply unit (400), may be blocked to prevent gas from being discharged to the outside.

[0069] To solve the above-described problem, the present invention provides an electrode notching method (S700) including a notching process (S710).

[0070] In the above notching process (S710), the laser irradiation unit (100) can irradiate the laser to the notching point (N) of the electrode sheet (50) to process the electrode sheet (50).

[0071] In the above notching process (S710), the first part (310) and the second part (320) can discharge gas.

[0072] According to embodiments of the present invention, an electrode notching device (10) includes a laser irradiation unit (100) that irradiates a laser to a notching point (N) of an electrode sheet (50) to process the electrode sheet (50); a jig (200) including a first jig unit (210) and a second jig unit (220) that are arranged facing the laser irradiation unit (100) with the electrode sheet (50) interposed therebetween and support the electrode sheet (50), and are arranged at a predetermined interval so that a laser that processes the electrode sheet (50) passes therebetween; A porous block (300) is disposed facing the laser irradiation unit (100) with the electrode sheet (50) interposed therebetween, and is disposed between the first jig unit (210) and the second jig unit (220), and is formed of a porous material, and is disposed at a predetermined interval so that a laser that processes the electrode sheet (50) passes therebetween, and includes a first portion (310) and a second portion (320) that discharge gas into the intervening space; and a gas supply portion (400) that introduces gas into the porous block (300).

[0073] Accordingly, foreign substances such as fume generated during notching are prevented from accumulating or sticking to the porous block (300) and jig (200) located near the notching point (N). Accordingly, the problem of the electrode sheet (50) being damaged or contaminated by foreign substances such as fume accumulating or sticking to objects (porous blocks, jigs) located near the notching point (N) can be solved or alleviated.

[0074] In addition, the cycle in which the notching process must be stopped and the jig, etc. must be washed in order to remove foreign substances such as fumes accumulated or adhered to objects (porous blocks, jigs) located close to the notching point (N) may be extended. Accordingly, the optimal environment (e.g., device arrangement, shape / position / position of the jig, suction air flow, etc.) set for notching the electrode sheet (50) can be maintained for a long time, so that the productivity, quality, and quality uniformity of the electrode and secondary battery can be improved, and the maintenance cost of the electrode notching device can be reduced. In addition, since the reset cycle of the optimal environment is also extended, the manufacturing cost of the electrode and secondary battery can be reduced.

[0075] In addition, since the first and second portions (310, 320) are formed of a porous material, gas can be discharged from numerous small-sized pores formed on the surfaces of the first and second portions (310, 320). Accordingly, foreign substances such as fumes can be effectively prevented from accumulating or sticking to the first and second portions (310, 320) and their surroundings. In addition, since gas can be uniformly discharged from the surfaces of the first and second portions (310, 320), gas discharged from the first and second portions (310, 320) can not interfere with notching of the electrode sheet (50).

[0076] According to embodiments of the present invention, the first portion (310) and the second portion (320) can cover the end faces of the first jig portion (210) and the second jig portion (220), respectively.

[0077] Accordingly, even if the leading edge surfaces of the first and second jig parts (210, 220) are close to the notching point (N) and do not discharge gas, foreign substances such as fumes may not accumulate or adhere to the leading edge surfaces of the first and second jig parts (210, 220) due to the first and second sections (310, 320).

[0078] According to embodiments of the present invention, the first portion (310) and the second portion (320) can be in contact with the tip portions of the first jig portion (210) and the second jig portion (220), respectively.

[0079] Accordingly, even if the tip portions of the first and second jig portions (210, 220) are positioned close to the notching point (N) and do not discharge gas, foreign substances such as fumes may not accumulate or adhere to the tip portions of the first and second jig portions (210, 220) due to the first and second sections (310, 320).

[0080] According to embodiments of the present invention, the first jig portion (210) and the second jig portion (220) may be placed in contact with the electrode sheet (50), and the first portion (310) and the second portion (320) may be placed in contact with or adjacent to the electrode sheet (50).

[0081] Accordingly, not only the first and second jig parts (210, 220) but also the first and second portions (310, 320) can support the electrode sheet (50). Accordingly, even if the first and second portions (310, 320) are arranged between the first and second jig parts (210, 220), the difference between the width (D2) of the section where the electrode sheet (50) is not supported between the first and second jig parts (210, 220) and the width (D1) of the notching hole (H) can be reduced. Accordingly, even if the first and second portions (310, 320) are arranged between the first and second jig parts (210, 220), the electrode sheet (50) can be stably supported, so that the distance between the laser irradiation portion (100) and the notching point (N) can be maintained constant as in the prior art. Therefore, even if the first and second sections (310, 320) are placed between the first and second jigs (210, 220), the electrode sheet (50) can be processed (notched) correctly and effectively.

[0082] In addition, since the first and second sections (310, 320) are arranged in contact with or adjacent to the electrode sheet (50), even if the tip portions of the first and second jig sections (210, 220) are positioned close to the notching point (N) and no gas is discharged, foreign substances such as fumes do not move to the first and second jig sections (210, 220) through the space between the first and second sections (310, 320) and the electrode sheet (50), and thus do not accumulate or become stuck to the tip portions of the first and second jig sections (210, 220).

[0083] According to embodiments of the present invention, the width (D2) of the section where the electrode sheet (50) is not supported between the first jig portion (210) and the second jig portion (220) may correspond to the width (D1) between the first portion (310) and the second portion (320).

[0084] Accordingly, even if the first and second portions (310, 320) are arranged between the first and second jig portions (210, 220), the electrode sheet (50) can be stably supported as in the prior art, so that the distance between the laser irradiation portion (100) and the notching point (N) can be maintained constant as in the prior art. Accordingly, even if the first and second portions (310, 320) are arranged between the first and second jig portions (210, 220), the electrode sheet (50) can be processed (notched) correctly and effectively as in the prior art.

[0085] According to embodiments of the present invention, one side of the first jig portion (210) and the second jig portion (220) that come into contact with the electrode sheet (50) and one side of the first portion (310) and the second portion (320) that come into contact with or are adjacent to the electrode sheet (50) can all form a single spherical surface or a single plane.

[0086] Accordingly, even if the first and second portions (310, 320) are arranged between the first and second jig portions (210, 220), the electrode sheet (50) can be stably supported to form a sphere or a plane as in the prior art, so that the distance between the laser irradiation portion (100) and the notching point (N) can be maintained constant as in the prior art. Accordingly, even if the first and second portions (310, 320) are arranged between the first and second jig portions (210, 220), the electrode sheet (50) can be processed (notched) correctly and effectively as in the prior art.

[0087] According to embodiments of the present invention, pores formed on one side (S1, S2) of the first portion (310) and the second portion (320) or on one side (S1, S2) of the first portion (310) and the second portion (320) that are in contact with or facing the electrode sheet (50) can be blocked to prevent gas from being discharged toward the electrode sheet (50).

[0088] Accordingly, even if the first and second sections (310, 320) discharge gas, the notching of the electrode sheet (50) may not be hindered.

[0089] According to embodiments of the present invention, the electrode notching device (10) may further include a suction port (512) for sucking foreign substances and gas. The laser irradiation unit (100) and the electrode sheet (50) may be arranged on one side of the first jig portion (210), the second jig portion (220), the first portion (310), and the second portion (320) in the first direction. The first jig portion (210) and the second jig portion (220) may be arranged on one side and the other side of the second direction intersecting the first direction, respectively. The first portion (310) and the second portion (320) may be arranged on one side and the other side of the second direction, respectively. The above suction port (512) is arranged adjacent to the notching point (N), the first portion (310) and the second portion (320), but may be arranged on one or the other side of a third direction intersecting the first and second directions of the notching point (N), the first portion (310) and the second portion (320).

[0090] Accordingly, even if gas is discharged from one side of the first direction of the first section (310) and the second section (320), it quickly flows into the suction port (512), so it may not significantly interfere with the notching of the electrode sheet (50).

[0091] According to embodiments of the present invention, the porous block (300) may include a third portion (330) coupled with the first portion (310) and introducing gas into the first portion (310), and a fourth portion (340) coupled with the second portion (320) and introducing gas into the second portion (320). The sizes of the third portion (330) and the fourth portion (340) may be larger than the sizes of the first portion (310) and the second portion (320), respectively. The gas supply unit (400) may introduce gas into the third portion (330) and the fourth portion (340).

[0092] Accordingly, gas can be discharged uniformly and stably from the first and second sections (310, 320).

[0093] According to embodiments of the present invention, the gas supply unit (400) may include a gas supply unit, a gas supply pipe (410) having one end connected to the gas supply unit, and a gas receiving space (420) connected to the third portion (330), the fourth portion (340) and the other end of the gas supply pipe (410) and having a larger size than the first portion (310) and the second portion (320). Gas supplied from the gas supply unit may be introduced into the third portion (330) and the fourth portion (340) through the gas supply pipe (410) and the gas receiving space (420).

[0094] Accordingly, since gas is supplied to the third and fourth sections (330, 340) through the gas receiving space (420), gas can be supplied to the third and fourth sections (330, 340) uniformly and stably. Accordingly, gas can be discharged uniformly and stably from the first and second sections (310, 320).

[0095] In addition, since the gas receiving space (420) is provided, the pressure of the gas discharged from the first and second sections (310, 320) can be stably controlled. For example, by increasing the amount of gas supplied to the gas receiving space (420) to increase the pressure inside the gas receiving space (420), high-pressure gas can be discharged from the first and second sections (310, 320). Conversely, by reducing the amount of gas supplied to the gas receiving space (420) to depressurize the inside of the gas receiving space (420), relatively low-pressure gas can be discharged from the first and second sections (310, 320).

[0096] According to embodiments of the present invention, the third portion (330) and the fourth portion (340) may be arranged to be spaced apart from each other. The gas supply pipe (410) may include a first supply pipe (412) and a second supply pipe (414) which have one end each connected to the gas supplier and are arranged to be spaced apart from each other. The gas receiving space (420) may include a first receiving space (422) connected to the other end of the first supply pipe (412) and the third portion (330), and a second receiving space (424) connected to the other end of the second supply pipe (414) and the fourth portion (340) and formed separately from the first receiving space (422).

[0097] Accordingly, since gas is individually introduced into the first and second sections (310, 320), the amount or pressure of gas discharged from the first and second sections (310, 320) can be individually easily controlled, and the amount or pressure of gas discharged from the first and second sections (310, 320) can be made uniform.

[0098] According to embodiments of the present invention, the laser irradiation unit (100) and the electrode sheet (50) may be arranged on one side of the first jig unit (210), the second jig unit (220), the first portion (310), and the second portion (320) in the first direction. The first portion (310) and the second portion (320) may be arranged on one side and the other side of the second direction intersecting the first direction, respectively. The third portion (330) and the fourth portion (340) may be arranged on the other side of the first portion (310) and the second portion (320) in the first direction, respectively. The first receiving space (422) and the second receiving space (424) may be respectively arranged on one side of the third portion (330) in the second direction and on the other side of the fourth portion (340) in the second direction.

[0099] Accordingly, since the gas supply unit (400) is formed symmetrically in the second direction, the intensity, direction, etc. of the gas discharged from the first section (310) and the gas discharged from the second section (320) can be similar. Accordingly, foreign substances such as fumes can be prevented from accumulating or sticking to either side of the second direction between the first and second sections (310, 320).

[0100] According to embodiments of the present invention, the gas supply unit (400) may include a flow control unit connected to the gas supply device or gas supply pipe (410).

[0101] Accordingly, the amount or pressure of gas discharged from the first and second sections (310, 320) can be controlled. In addition, by reducing or blocking gas discharge from the first and second sections (310, 320) when the notching process is stopped or on standby, shaking of the electrode sheet (50) can be prevented or the laser focal length can be prevented from changing.

[0102] According to embodiments of the present invention, at least a portion of the outer surface of the third portion (330) and the fourth portion (340), excluding the first portion connected to the first portion (310) and the second portion (320) respectively and the second portion connected to the gas supply unit (400), may be blocked to prevent gas from being discharged to the outside.

[0103] Accordingly, gas can be discharged uniformly and stably from the first and second sections (310, 320).

[0104] According to embodiments of the present invention, the electrode notching method (S700) may include a notching process (S710) in which the laser irradiation unit (100) irradiates a laser to the notching point (N) of the electrode sheet (50) to process the electrode sheet (50). In the notching process (S710), the first portion (310) and the second portion (320) may discharge gas.

[0105] Accordingly, foreign substances such as fume generated during notching are prevented from accumulating or sticking to the porous block (300) and jig (200) located near the notching point (N). Accordingly, the problem of the electrode sheet (50) being damaged or contaminated by foreign substances such as fume accumulating or sticking to objects (porous blocks, jigs) located near the notching point (N) can be solved or alleviated.

[0106] In addition, the cycle in which the notching process must be stopped and the jig, etc. must be washed in order to remove foreign substances such as fumes accumulated or adhered to objects (porous blocks, jigs) located close to the notching point (N) may be extended. Accordingly, the optimal environment (e.g., device arrangement, shape / position / position of the jig, suction air flow, etc.) set for notching the electrode sheet (50) can be maintained for a long time, so that the productivity, quality, and quality uniformity of the electrode and secondary battery can be improved, and the maintenance cost of the electrode notching device can be reduced. In addition, since the reset cycle of the optimal environment is also extended, the manufacturing cost of the electrode and secondary battery can be reduced.

[0107] In addition, since the first and second portions (310, 320) are formed of a porous material, gas can be discharged from numerous small-sized pores formed on the surfaces of the first and second portions (310, 320). Accordingly, foreign substances such as fumes can be effectively prevented from accumulating or sticking to the first and second portions (310, 320) and their surroundings. In addition, since gas can be uniformly discharged from the surfaces of the first and second portions (310, 320), gas discharged from the first and second portions (310, 320) can not interfere with notching of the electrode sheet (50).

[0108] In addition to the effects described above, specific effects of the present invention are described below while explaining specific details for carrying out the invention.

[0109] Figures 1 to 3 are side views and front views schematically showing an electrode notching device according to one embodiment of the present invention.

[0110] FIG. 4 is a side view schematically showing a state in which one side of the first and second portions of the porous block of the electrode notching device of FIGS. 1 to 3 is blocked.

[0111] Figures 5 and 6 are side views and front views showing a state in which a suction tube is arranged in the electrode notching device of Figures 1 to 4.

[0112] Figure 7 is a flowchart of an electrode notching method according to one embodiment of the present invention.

[0113]

[0114] [Explanation of symbols]

[0115] 10: Electrode notching device

[0116] 50: Electrode sheet N: Notching point

[0117] 100: Laser irradiation department

[0118] 200: Jig

[0119] 210: 1st jig section 220: 2nd jig section

[0120] 300: Porous block

[0121] 310: Part 1 320: Part 2

[0122] 330: Third section 340: Fourth section

[0123] 400: Gas supply section

[0124] 410: Gas supply pipe

[0125] 412: First supply pipe 414: Second supply pipe

[0126] 420: Gas receiving space

[0127] 422: First reception space 424: Second reception space

[0128] 512: Intake

[0129] The above-described objects, features, and advantages will be described in detail below with reference to the accompanying drawings, so that those skilled in the art can easily practice the technical idea of ​​the present invention. In describing the present invention, if it is determined that a detailed description of known technologies related to the present invention may unnecessarily obscure the gist of the present invention, a detailed description thereof will be omitted. Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the drawings, the same reference numerals are used to indicate the same or similar components.

[0130] Although terms like "first" and "second" are used to describe various components, these components are not limited by these terms. These terms are used merely to distinguish one component from another, and unless otherwise specified, a "first" component may also be a "second" component.

[0131] Throughout the specification, unless otherwise specifically stated, each element may be singular or plural.

[0132] Hereinafter, the phrase "any configuration is placed on (or below)" a component or "on (or below)" a component may mean that any configuration is placed in contact with the upper surface (or lower surface) of said component, and that other configurations may be interposed between said component and any configuration placed on (or below) said component.

[0133] Additionally, when it is described that a component is "connected," "coupled," or "connected" to another component, it should be understood that the components may be directly connected or connected to one another, but that other components may also be "interposed" between the components, or that each component may be "connected," "coupled," or "connected" through another component.

[0134] As used herein, singular expressions include plural expressions unless the context clearly dictates otherwise. In this application, terms such as "consisting of" or "comprising" should not necessarily be construed to include all of the components or steps described in the specification, and should be construed to mean that some of the components or steps may not be included, or that additional components or steps may be included.

[0135]

[0136] Figures 1 to 3 are side views and front views schematically showing an electrode notching device according to an embodiment of the present invention. Figure 4 is a side view schematically showing a state in which one side of the first portion and the second portion of the porous block of the electrode notching device of Figures 1 to 3 is blocked. Figures 5 and 6 are side views and front views showing a state in which a suction tube is arranged in the electrode notching device of Figures 1 to 4. Figure 7 is a flow chart of an electrode notching method according to an embodiment of the present invention.

[0137]

[0138] [Electrode Notching Device]

[0139] Referring to FIGS. 1 to 6, an electrode notching device (10) according to one embodiment may include a laser irradiation unit (100), a jig (200), a porous block (300), and a gas supply unit (400). The electrode notching device (10) may include a suction unit (500).

[0140] The laser irradiation unit (100) can process the electrode sheet (50) by irradiating the laser to the notching point (N) of the electrode sheet (50). For example, the laser irradiation unit (100) can irradiate the laser in the first direction.

[0141] The laser irradiation unit (100) and the electrode sheet (50) can be placed on one side (e.g., the front side) of the first jig unit (210), the second jig unit (220), the first section (310), and the second section (320) in the first direction (e.g., the front-back direction).

[0142] The jig (200) can be placed facing the laser irradiation unit (100) with the electrode sheet (50) interposed therebetween. The jig (200) can support the electrode sheet (50). The jig (200) can include a first jig section (210) and a second jig section (220).

[0143] The first jig part (210) and the second jig part (220) may be arranged at a predetermined interval so that the laser that processes the electrode sheet (50) passes between them. The first jig part (210) and the second jig part (220) may be arranged on one side (e.g., the lower side) and the other side (e.g., the upper side) of the second direction (e.g., the up-down direction) intersecting the first direction, respectively.

[0144] The first jig part (210) and the second jig part (220) can come into contact with the electrode sheet (50).

[0145]

[0146] [Porous block, gas supply unit]

[0147] The porous block (300) can be placed facing the laser irradiation unit (100) with the electrode sheet (50) interposed therebetween. The porous block (300) can be placed at least partially between the first jig unit (210) and the second jig unit (220).

[0148] The porous block (300) may be formed of a porous material. The porous material may be a porous ceramic material. The pores of the porous block (300) may have a size in the range of 0.1-100 μm. The pores of the porous block (300) may be known open pores connected to the surface of the porous block (300). Accordingly, gas introduced into the porous block (300) through one surface of the porous block (300) may be (finely) discharged to the outside through the other surface of the porous block (300).

[0149] The porous block (300) may include a first portion (310) and a second portion (320). The porous block (300) may include a third portion (330) and a fourth portion (340).

[0150] The first portion (310) and the second portion (320) may be arranged between the first jig portion (210) and the second jig portion (220). The first portion (310) and the second portion (320) may be arranged at a predetermined interval so that the laser that processes the electrode sheet (50) passes therebetween. The first portion (310) and the second portion (320) may be arranged on one side (e.g., the lower side) and the other side (e.g., the upper side) of the second direction intersecting the first direction, respectively. The space between the first and second portions (310, 320) may be a notching hole (H) for passing the laser.

[0151] The first section (310) and the second section (320) can discharge gas into the space between them.

[0152] The first part (310) and the second part (320) can cover the end faces of the first jig part (210) and the second jig part (220), respectively.

[0153] Accordingly, even if the leading edge surfaces of the first and second jig parts (210, 220) are close to the notching point (N) and do not discharge gas, foreign substances such as fumes may not accumulate or adhere to the leading edge surfaces of the first and second jig parts (210, 220) due to the first and second parts (310, 320). Here, the fumes may be generated when the electrode sheet (50) made of a metal material is evaporated or condensed instantaneously when a laser is irradiated to the electrode sheet (50).

[0154] The first portion (310) and the second portion (320) may be placed in contact with or adjacent to the electrode sheet (50). At this time, the first jig portion (210) and the second jig portion (220) may be in contact with the electrode sheet (50).

[0155] Accordingly, not only the first and second jig parts (210, 220) but also the first and second portions (310, 320) can support the electrode sheet (50). Accordingly, even if the first and second portions (310, 320) are arranged between the first and second jig parts (210, 220), the difference between the width (D2) of the section where the electrode sheet (50) is not supported between the first and second jig parts (210, 220) and the width (D1) of the notching hole (H) can be reduced. Accordingly, even if the first and second portions (310, 320) are arranged between the first and second jig parts (210, 220), the electrode sheet (50) can be stably supported, so that the distance between the laser irradiation portion (100) and the notching point (N) can be maintained constant as in the prior art. Therefore, even if the first and second sections (310, 320) are placed between the first and second jigs (210, 220), the electrode sheet (50) can be processed (notched) correctly and effectively.

[0156] In addition, since the first and second sections (310, 320) are arranged in contact with or adjacent to the electrode sheet (50), even if the tip portions of the first and second jig sections (210, 220) are positioned close to the notching point (N) and no gas is discharged, foreign substances such as fumes do not move to the first and second jig sections (210, 220) through the space between the first and second sections (310, 320) and the electrode sheet (50), and thus do not accumulate or become stuck to the tip portions of the first and second jig sections (210, 220).

[0157] For example, the first and second sections (310, 320) may be formed with a length of 0.5 mm or more and 10 mm or less from the tip of the first and second jig sections (210, 220) toward the front side.

[0158] The width (D2) of the section where the electrode sheet (50) is not supported between the first jig section (210) and the second jig section (220) may correspond to the width (D1) between the first section (310) and the second section (320).

[0159] Accordingly, even if the first and second portions (310, 320) are arranged between the first and second jig portions (210, 220), the electrode sheet (50) can be stably supported as in the prior art, so that the distance between the laser irradiation portion (100) and the notching point (N) can be maintained constant as in the prior art. Accordingly, even if the first and second portions (310, 320) are arranged between the first and second jig portions (210, 220), the electrode sheet (50) can be processed (notched) correctly and effectively as in the prior art.

[0160] One side of the first jig portion (210) and the second jig portion (220), which are in contact with the electrode sheet (50), and one side of the first portion (310) and the second portion (320), which are in contact with or adjacent to the electrode sheet (50), can all form a single spherical surface or a single plane. That is, the first and second portions (310, 320) can be connected to the ends of the first and second jig portions (210, 220) without a step.

[0161] Accordingly, even if the first and second portions (310, 320) are arranged between the first and second jig portions (210, 220), the electrode sheet (50) can be stably supported to form a sphere or a plane as in the prior art, so that the distance between the laser irradiation portion (100) and the notching point (N) can be maintained constant as in the prior art. Accordingly, even if the first and second portions (310, 320) are arranged between the first and second jig portions (210, 220), the electrode sheet (50) can be processed (notched) correctly and effectively as in the prior art.

[0162] The first part (310) and the second part (320) can be in contact with the tips of the first jig part (210) and the second jig part (220), respectively.

[0163] Accordingly, even if the tip portions of the first and second jig portions (210, 220) are positioned close to the notching point (N) and do not discharge gas, foreign substances such as fumes may not accumulate or adhere to the tip portions of the first and second jig portions (210, 220) due to the first and second sections (310, 320).

[0164] The pores formed on one side (S1, S2) of the first portion (310) and the second portion (320) or on one side (S1, S2) of the first portion (310) and the second portion (320) that are in contact with or facing the electrode sheet (50) can be blocked to prevent gas from emitting toward the electrode sheet (50). For example, one side (S1, S2) of the first portion (310) and the second portion (320) in the first direction can be blocked by coating with a predetermined material, or the pores of one side (S1, S2) of the first portion (310) and the second portion (320) can be processed to be blocked (Fig. 4).

[0165] Accordingly, even if the first and second sections (310, 320) discharge gas, the notching of the electrode sheet (50) may not be hindered.

[0166] The third section (330) can be combined with the first section (310). The third section (330) can introduce gas into the first section (310).

[0167] The fourth section (340) can be combined with the second section (320). The fourth section (340) can introduce gas into the second section (320).

[0168] The sizes of the third part (330) and the fourth part (340) may be larger than the sizes of the first part (310) and the second part (320), respectively.

[0169] The third section (330) and the fourth section (340) can be positioned spaced apart from each other.

[0170] The third part (330) and the fourth part (340) may be respectively positioned on the other side (e.g., the right side) of the first part (310) and the second part (320) in the first direction.

[0171]

[0172] [Gas Supply Department]

[0173] The gas supply unit (400) can supply gas to the porous block (300).

[0174] In this way, the electrode notching device (10) may include a laser irradiation unit (100), a jig (200), a porous block (300), and a gas supply unit (400). Accordingly, foreign substances such as fumes generated during notching are prevented from accumulating or sticking to the porous block (300) and jig (200) located near the notching point (N). Accordingly, the problem of the electrode sheet (50) being damaged or contaminated by foreign substances such as fumes accumulating or sticking to objects (porous blocks, jigs) located near the notching point (N) can be solved or alleviated.

[0175] In addition, the cycle in which the notching process must be stopped and the jig, etc. must be washed in order to remove foreign substances such as fumes accumulated or adhered to objects (porous blocks, jigs) located close to the notching point (N) may be extended. Accordingly, the optimal environment (e.g., device arrangement, shape / position / position of the jig, suction air flow, etc.) set for notching the electrode sheet (50) can be maintained for a long time, so that the productivity, quality, and quality uniformity of the electrode and secondary battery can be improved, and the maintenance cost of the electrode notching device can be reduced. In addition, since the reset cycle of the optimal environment is also extended, the manufacturing cost of the electrode and secondary battery can be reduced.

[0176] In addition, since the first and second portions (310, 320) are formed of a porous material, gas can be discharged from numerous small-sized pores formed on the surfaces of the first and second portions (310, 320). Accordingly, foreign substances such as fumes can be effectively prevented from accumulating or sticking to the first and second portions (310, 320) and their surroundings. In addition, since gas can be uniformly discharged from the surfaces of the first and second portions (310, 320), gas discharged from the first and second portions (310, 320) can not interfere with notching of the electrode sheet (50).

[0177] The gas supply unit (400) can supply gas to the third section (330) and the fourth section (340).

[0178] Accordingly, gas can be discharged uniformly and stably from the first and second sections (310, 320).

[0179] The gas supply unit (400) may include a gas supply device, a gas supply pipe (410), and a gas receiving space (420). The gas supply unit (400) may include a flow control unit.

[0180] A gas supply unit (not shown) can supply gas.

[0181] The gas supply pipe (410) may include a first supply pipe (412) and a second supply pipe (414). One end of the first supply pipe (412) and the second supply pipe (414) may be connected to a gas supplier, respectively. The first supply pipe (412) and the second supply pipe (414) may be arranged to be spaced apart from each other.

[0182] The gas receiving space (420) may be connected to the third section (330), the fourth section (340), and the other end of the gas supply pipe (410). The gas receiving space (420) may be larger than the first section (310) and the second section (320). Here, the size may be volume.

[0183] The gas receiving space (420) may include a first receiving space (422) and a second receiving space (424).

[0184] The first receiving space (422) can be connected to the other end of the first supply pipe (412) and the third portion (330). The second receiving space (424) can be connected to the other end of the second supply pipe (414) and the fourth portion (340). The second receiving space (424) can be formed separately from the first receiving space (422).

[0185] Accordingly, since gas is individually introduced into the first and second sections (310, 320), the amount or pressure of gas discharged from the first and second sections (310, 320) can be individually easily controlled, and the amount or pressure of gas discharged from the first and second sections (310, 320) can be made uniform.

[0186] The gas supplied from the gas supplier can be introduced into the third section (330) and fourth section (340) through the gas supply pipe (410) and the gas receiving space (420).

[0187] Accordingly, since gas is supplied to the third and fourth sections (330, 340) through the gas receiving space (420), gas can be supplied to the third and fourth sections (330, 340) uniformly and stably. Accordingly, gas can be discharged uniformly and stably from the first and second sections (310, 320).

[0188] In addition, since the gas receiving space (420) is provided, the pressure of the gas discharged from the first and second sections (310, 320) can be stably controlled. For example, by increasing the amount of gas supplied to the gas receiving space (420) to increase the pressure inside the gas receiving space (420), high-pressure gas can be discharged from the first and second sections (310, 320). Conversely, by reducing the amount of gas supplied to the gas receiving space (420) to depressurize the inside of the gas receiving space (420), relatively low-pressure gas can be discharged from the first and second sections (310, 320).

[0189] The first receiving space (422) and the second receiving space (424) may be respectively arranged on one side of the third portion (330) in the second direction and on the other side of the fourth portion (340) in the second direction. At this time, as described above, the first portion (310) and the second portion (320) may be respectively arranged on one side and the other side of the second direction, and the third portion (330) and the fourth portion (340) may be respectively arranged on the other side of the first portion (310) and the second portion (320) in the first direction.

[0190] Accordingly, since the gas supply unit (400) is formed symmetrically in the second direction, the intensity, direction, etc. of the gas discharged from the first section (310) and the gas discharged from the second section (320) can be similar. Accordingly, foreign substances such as fumes can be prevented from accumulating or sticking to either side of the second direction between the first and second sections (310, 320).

[0191] The flow control unit can be connected to the gas supply unit or gas supply pipe (410).

[0192] Accordingly, the amount or pressure of gas discharged from the first and second sections (310, 320) can be controlled. In addition, by reducing or blocking gas discharge from the first and second sections (310, 320) when the notching process is stopped or on standby, shaking of the electrode sheet (50) can be prevented or the laser focal length can be prevented from changing.

[0193] At least a portion of the outer surface of the third portion (330) and the fourth portion (340), excluding the first portion connected to the first portion (310) and the second portion (320) and the second portion connected to the gas supply unit (400), may be blocked to prevent gas from being discharged to the outside. For example, the at least portion may be blocked by coating with a predetermined material, covered with a cover (350), or treated so that the pores of the at least portion are blocked.

[0194] Accordingly, gas can be discharged uniformly and stably from the first and second sections (310, 320).

[0195]

[0196] [Suction part]

[0197] The suction unit (500) may include a suction device (not shown) and a suction tube (510). A suction port (512) may be formed at the end of the suction tube (510). Foreign substances and gases may be suctioned through the suction port (512). Here, the foreign substances may include fumes generated during notching.

[0198] The suction port (512) may be positioned adjacent to the notching point (N), the first portion (310), and the second portion (320). The suction port (512) may be positioned on one or the other side of a third direction (e.g., left-right direction) intersecting the first and second directions of the notching point (N), the first portion (310), and the second portion (320) (Figs. 5 and 6).

[0199] #07#Accordingly, even if gas is discharged from one side of the first direction of the first section (310) and the second section (320), it quickly flows into the suction port (512), so it may not significantly interfere with the notching of the electrode sheet (50).

[0200]

[0201] [Electrode notching method]

[0202] Referring to FIG. 15, an electrode notching method according to one embodiment of the present invention may include a notching process (S710).

[0203] In the notching process (S710), the laser irradiation unit (100) can process the electrode sheet (50) by irradiating the laser to the notching point (N) of the electrode sheet (50).

[0204] Here, the first section (310) and the second section (320) can discharge gas.

[0205] Accordingly, foreign substances such as fume generated during notching are prevented from accumulating or sticking to the porous block (300) and jig (200) located near the notching point (N). Accordingly, the problem of the electrode sheet (50) being damaged or contaminated by foreign substances such as fume accumulating or sticking to objects (porous blocks, jigs) located near the notching point (N) can be solved or alleviated.

[0206] In addition, the cycle in which the notching process must be stopped and the jig, etc. must be washed in order to remove foreign substances such as fumes accumulated or adhered to objects (porous blocks, jigs) located close to the notching point (N) may be extended. Accordingly, the optimal environment (e.g., device arrangement, shape / position / position of the jig, suction air flow, etc.) set for notching the electrode sheet (50) can be maintained for a long time, so that the productivity, quality, and quality uniformity of the electrode and secondary battery can be improved, and the maintenance cost of the electrode notching device can be reduced. In addition, since the reset cycle of the optimal environment is also extended, the manufacturing cost of the electrode and secondary battery can be reduced.

[0207] In addition, since the first and second portions (310, 320) are formed of a porous material, gas can be discharged from numerous small-sized pores formed on the surfaces of the first and second portions (310, 320). Accordingly, foreign substances such as fumes can be effectively prevented from accumulating or sticking to the first and second portions (310, 320) and their surroundings. In addition, since gas can be uniformly discharged from the surfaces of the first and second portions (310, 320), gas discharged from the first and second portions (310, 320) can not interfere with notching of the electrode sheet (50).

[0208]

[0209] It should be understood that the above-described embodiments are illustrative in all respects and not restrictive, and the scope of the present invention will be determined by the claims that follow, rather than by the detailed description set forth above. Furthermore, the meaning and scope of the claims that follow, as well as all possible modifications and variations derived from their equivalent concepts, should be construed as encompassing the scope of the present invention.

[0210] Although the present invention has been described with reference to the drawings exemplified above, it is to be understood that the present invention is not limited to the embodiments and drawings disclosed herein, and that various modifications may be made by those skilled in the art within the scope of the technical idea of ​​the present invention. Furthermore, even if the operational effects according to the configuration of the present invention have not been explicitly described while describing the embodiments of the present invention, it is natural that the effects predictable by the corresponding configuration should also be acknowledged.

Claims

1. A laser irradiation unit (100) that processes the electrode sheet (50) by irradiating the laser to the notching point (N) of the electrode sheet (50); A jig (200) including a first jig part (210) and a second jig part (220) that are arranged facing the laser irradiation part (100) with the electrode sheet (50) interposed therebetween, support the electrode sheet (50), and are arranged at a predetermined interval so that the laser that processes the electrode sheet (50) passes therebetween; A porous block (300) that is positioned facing the laser irradiation unit (100) with the electrode sheet (50) interposed therebetween, and is formed of a porous material and is positioned between the first jig unit (210) and the second jig unit (220), and is positioned at a predetermined interval so that the laser that processes the electrode sheet (50) passes between them, and includes a first section (310) and a second section (320) that discharge gas into the intervening space; and Including a gas supply unit (400) that introduces gas into the porous block (300). Electrode notching device.

2. In claim 1, The above first part (310) and second part (320) are electrode notching devices that cover the end faces of the first jig part (210) and the second jig part (220), respectively.

3. In claim 2, The above first part (310) and second part (320) are electrode notching devices that contact the tips of the first jig part (210) and second jig part (220), respectively.

4. In any one of claims 1 to 3, An electrode notching device in which the first jig portion (210) and the second jig portion (220) are in contact with the electrode sheet (50), and the first portion (310) and the second portion (320) are in contact with or adjacent to the electrode sheet (50).

5. In claim 4, An electrode notching device, wherein the width (D2) of the section where the electrode sheet (50) is not supported between the first jig portion (210) and the second jig portion (220) corresponds to the width (D1) between the first portion (310) and the second portion (320).

6. In claims 4 to 5, An electrode notching device, wherein one side of the first jig portion (210) and the second jig portion (220) in contact with the electrode sheet (50) and one side of the first portion (310) and the second portion (320) in contact with or adjacent to the electrode sheet (50) all together form a single spherical surface or a single plane.

7. In any one of claims 4 to 6, An electrode notching device in which pores formed on one side (S1, S2) of the first portion (310) and the second portion (320) or on one side (S1, S2) of the first portion (310) and the second portion (320) that contact or face the electrode sheet (50) are blocked to prevent gas from being discharged toward the electrode sheet (50).

8. In any one of claims 1 to 7, It further includes a suction port (512) for sucking in foreign substances and gases, The above laser irradiation unit (100) and electrode sheet (50) are arranged on one side of the first direction of the first jig unit (210), the second jig unit (220), the first section (310) and the second section (320). The first jig part (210) and the second jig part (220) are respectively placed on one side and the other side of the second direction intersecting the first direction. The first part (310) and the second part (320) are respectively positioned on one side and the other side of the second direction. The above suction port (512) is arranged adjacent to the notching point (N), the first portion (310) and the second portion (320), but is arranged on one side or the other side of a third direction intersecting the first direction and the second direction of the notching point (N), the first portion (310) and the second portion (320).

9. In any one of claims 1 to 8, The above porous block (300) includes a third section (330) that is coupled with the first section (310) and introduces gas into the first section (310), and a fourth section (340) that is coupled with the second section (320) and introduces gas into the second section (320). The sizes of the third part (330) and the fourth part (340) are larger than the sizes of the first part (310) and the second part (320), respectively. The above gas supply unit (400) is an electrode notching device that introduces gas into the third section (330) and the fourth section (340).

10. In claim 9, The above gas supply unit (400) includes a gas supply unit, a gas supply pipe (410) one end of which is connected to the gas supply unit, and a gas receiving space (420) connected to the third section (330), the fourth section (340) and the other end of the gas supply pipe (410) and having a larger size than the first section (310) and the second section (320). An electrode notching device in which gas supplied from the above gas supplier flows into the third section (330) and the fourth section (340) through the above gas supply pipe (410) and the gas receiving space (420).

11. In claim 10, The third part (330) and the fourth part (340) are arranged spaced apart from each other, The above gas supply pipe (410) includes a first supply pipe (412) and a second supply pipe (414) which are each connected to the gas supply unit at one end and are arranged spaced apart from each other. The above gas receiving space (420) is an electrode notching device including a first receiving space (422) connected to the other end and the third portion (330) of the first supply pipe (412), and a second receiving space (424) connected to the other end and the fourth portion (340) of the second supply pipe (414) and formed separately from the first receiving space (422).

12. In claim 11, The above laser irradiation unit (100) and electrode sheet (50) are arranged on one side of the first direction of the first jig unit (210), the second jig unit (220), the first section (310) and the second section (320). The first part (310) and the second part (320) are respectively positioned on one side and the other side of the second direction intersecting the first direction. The third part (330) and the fourth part (340) are respectively positioned on the other side of the first part (310) and the second part (320) in the first direction. The electrode notching device in which the first receiving space (422) and the second receiving space (424) are respectively arranged on one side of the third portion (330) in the second direction and on the other side of the fourth portion (340) in the second direction.

13. In any one of claims 10 to 12, The above gas supply unit (400) is an electrode notching device including a flow control unit connected to the gas supply device or gas supply pipe (410).

14. In any one of claims 9 to 13, An electrode notching device in which at least a portion of the outer surface of the third portion (330) and the fourth portion (340), excluding the first portion connected to the first portion (310) and the second portion (320) respectively and the second portion connected to the gas supply unit (400), is blocked so as not to discharge gas to the outside.

15. In an electrode notching method (S700) using an electrode notching device (10) of any one of claims 1 to 14, The above laser irradiation unit (100) includes a notching process (S710) in which the electrode sheet (50) is processed by irradiating the laser to the notching point (N) of the electrode sheet (50). An electrode notching method in which the first part (310) and the second part (320) discharge gas in the above notching process (S710).

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