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KR-102963060-B1 - APPARATUS AND METHOD FOR MANUFACTURING ELECTRODE PLATE

KR102963060B1KR 102963060 B1KR102963060 B1KR 102963060B1KR-102963060-B1

Abstract

The present invention relates to an apparatus and method for manufacturing an electrode plate, comprising: a roll on which a substrate of a current collector is wound; a conveying unit for unwinding the substrate of the current collector from the roll and conveying it in one direction; a coating unit for coating a slurry containing an active material onto the substrate of the current collector in a pattern extending along the width direction of the substrate; a pressing unit for pressing the slurry coated on the substrate toward the substrate; a slitting unit for cutting the substrate along the conveying direction; and a cutting unit for cutting the substrate along the width direction of the substrate. The invention also provides a method for manufacturing an electrode plate comprising: a slurry preparation step for preparing a slurry containing an active material; a conveying step for conveying a substrate to be a current collector in one direction; a coating step for forming a coating layer by coating the slurry in a pattern extending along the width direction of the substrate; a pressing step for pressing the coating layer toward the substrate; a slitting step for cutting the substrate on which the coating layer is formed along the conveying direction; and a cutting step for cutting the slit substrate in the width direction.

Inventors

  • 김정훈
  • 이재욱
  • 최성현
  • 김철환

Assignees

  • 삼성에스디아이 주식회사

Dates

Publication Date
20260512
Application Date
20190715

Claims (10)

  1. A roll wound with the entire house's contents; A transfer unit that unwinds the substrate of the current collector from the above roll and transfers it in one direction; A coating portion that coats a slurry containing an active material onto a substrate of the current collector in a pattern extending along the width direction of the substrate; A pressing part that presses the slurry coated on the above substrate toward the substrate; A slitting section that cuts the above material along the above conveying direction; A cutting section that cuts the above-mentioned material along the width direction of the above-mentioned material; is included, The above coating portion simultaneously coats the upper and lower surfaces of the above substrate, and The above pressing unit includes a roller whose rotational center axis is arranged along the width direction of the above material, and An electrode plate manufacturing apparatus characterized by installing a heat source within the roller to raise the temperature of the slurry.
  2. In paragraph 1, The above coating part includes a slit die coater, and The slit of the above-mentioned slit die coater extends along the above-mentioned transfer direction, and The above-mentioned slit-formed die is an electrode plate manufacturing device that reciprocates along the width direction of the above-mentioned substrate.
  3. In paragraph 2, The above-mentioned slit die coater includes a plurality of slits, and The above plurality of slit dies are arranged spaced apart from each other along the transfer direction in an electrode plate manufacturing device.
  4. In paragraph 1, The electrode plate manufacturing apparatus comprising a silk screen having a shape corresponding to a pattern extended along the width direction of the substrate, wherein the coating portion is the above-mentioned coating portion.
  5. In paragraph 4, The above silk screen is provided in multiple units, and The above plurality of silk screens are arranged spaced apart from each other along the transfer direction in an electrode plate manufacturing device.
  6. delete
  7. Slurry preparation step for preparing a slurry containing an active material; A transfer step for transferring the material to be the entire house in one direction; A coating step of forming a coating layer by coating the slurry in a pattern extended along the width direction of the above-mentioned substrate, and simultaneously coating the upper and lower surfaces of the above-mentioned substrate; A pressing step of pressing the coating layer toward the substrate; A slitting step of cutting the substrate having the coating layer formed thereon along the conveying direction; A cutting step of cutting the slit substrate in the width direction; comprising, The above pressing step is performed by a roller whose rotational center axis is positioned in the width direction of the substrate, and A method for manufacturing an electrode plate characterized by installing a heat source within the roller to raise the temperature of the slurry.
  8. In Paragraph 7, The above coating step is repeated multiple times, and A method for manufacturing an electrode plate in which the coating layer formed each time through the above multiple coating steps is formed spaced apart along the transfer direction from the coating layer formed through the preceding coating step.
  9. delete
  10. In Paragraph 7, The above cutting step is a method for manufacturing an electrode plate that cuts the substrate along the boundary of the coating layer.

Description

Apparatus and Method for Manufacturing Electrode Plate The present invention relates to an apparatus and method for manufacturing an electrode plate. Generally, a secondary battery is formed by housing an electrode assembly, consisting of a positive electrode, a negative electrode, and a separator sandwiched between the two plates, in a case along with an electrolyte. Unlike primary batteries, which cannot be recharged, these secondary batteries are capable of both charging and discharging. With the technological development and increased production of mobile devices such as mobile phones and laptops, the demand for secondary batteries as an energy source is surging. Recently, active research and development is also underway for their use in electric and hybrid vehicles as an alternative energy source to replace fossil fuels. Currently commercialized rechargeable batteries include nickel-cadmium, nickel-hydrogen, nickel-zinc, and lithium-ion batteries. Among these, lithium-ion batteries are gaining attention for their advantages, such as the ability to charge and discharge freely with almost no memory effect compared to nickel-based batteries, a very low self-discharge rate, and high energy density. Due to the emergence of high-power, high-capacity consumption applications such as electric vehicles, increasing the capacity per unit volume of secondary batteries is being researched as a major challenge. To this end, improvements are required starting from the manufacturing stage of the positive and negative electrodes—that is, the electrode plates—that constitute the secondary battery. The information described above disclosed in the background technology of this invention is intended only to enhance understanding of the background of the present invention and may therefore include information that does not constitute prior art. FIG. 1 is a schematic diagram functionally illustrating the front view of an embodiment of an electrode plate manufacturing device according to the present invention. FIG. 2 is a partial plan view schematically illustrating the transfer section and the pressing section of the embodiment of FIG. 1. FIG. 3 is a partial plan view for explaining the slitting process of a substrate on which a coating layer is formed in FIG. 2. FIG. 4a is a partial plan view illustrating the cutting process of the slit substrate in FIG. 3. FIG. 4b is a partial plan view to explain a deformation of the material of FIG. 4a. Figure 5 is a cross-sectional view along line AA of Figure 4a. FIG. 6 is a plan view illustrating an example of an electrode plate with cutting and notching completed. FIG. 7 is a partial plan view schematically illustrating the transfer section and the pressing section of the embodiment of FIG. 1. FIG. 8 is a partial plan view for explaining the slitting process of a substrate on which a coating layer is formed in FIG. 7. FIG. 9 is a partial plan view illustrating the cutting process of the slit substrate in FIG. 8. FIG. 10 is a plan view illustrating an example of an electrode plate with the cutting completed. FIGS. 11 and FIGS. 12 are partial plan views to illustrate different forms of the coating portion in the example of FIG. 7. FIG. 13 is a flowchart of an embodiment of a method for manufacturing an electrode plate according to the present invention. Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the attached drawings. The embodiments of the present invention are provided to more fully explain the present invention to those skilled in the art, and the following embodiments may be modified in various different 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 faithful and complete and to fully convey the spirit of the present invention to those skilled in the art. Additionally, in the drawings below, the thickness or size of each layer is exaggerated for convenience and clarity of explanation, and like reference numerals in the drawings refer to like elements. As used herein, the term "and/or" includes any one of the listed items and all combinations of one or more thereof. Furthermore, in this specification, the meaning of "connected" refers not only to cases where Member A and Member B are directly connected, but also to cases where Member C is interposed between Member A and Member B so that Member A and Member B are indirectly connected. The terms used herein are for describing specific embodiments and are not intended to limit the invention. As used herein, the singular form may include the plural form unless the context clearly indicates otherwise. Additionally, as used herein, "comprise" and/or "comprising" specify the presence of the mentioned features, numbers, steps, actions, parts, elements, and/or groups thereof, and do not exclude the presence or addition of one or more other features, numbers, acti