KR100603268B1 - Apparatus for carbon coating on collector of secondary cell - Google Patents

Apparatus for carbon coating on collector of secondary cell Download PDF

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Publication number
KR100603268B1
KR100603268B1 KR1019990050587A KR19990050587A KR100603268B1 KR 100603268 B1 KR100603268 B1 KR 100603268B1 KR 1019990050587 A KR1019990050587 A KR 1019990050587A KR 19990050587 A KR19990050587 A KR 19990050587A KR 100603268 B1 KR100603268 B1 KR 100603268B1
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South Korea
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current collector
carbon coating
liquid
tab
coating liquid
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KR1019990050587A
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Korean (ko)
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KR20010046707A (en
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김성훈
이형진
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삼성에스디아이 주식회사
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C1/00—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating
    • B05C1/04—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length
    • B05C1/16—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length only at particular parts of the work
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B9/00—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour
    • B05B9/03—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour characterised by means for supplying liquid or other fluent material
    • B05B9/04—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour characterised by means for supplying liquid or other fluent material with pressurised or compressible container; with pump
    • B05B9/0403—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour characterised by means for supplying liquid or other fluent material with pressurised or compressible container; with pump with pumps for liquids or other fluent material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C1/00—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating
    • B05C1/003—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating incorporating means for heating or cooling the liquid or other fluent material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C1/00—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating
    • B05C1/04—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length
    • B05C1/08—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length using a roller or other rotating member which contacts the work along a generating line
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C21/00—Accessories or implements for use in connection with applying liquids or other fluent materials to surfaces, not provided for in groups B05C1/00 - B05C19/00
    • B05C21/005—Masking devices

Abstract

리튬 2차전지용 집전체 카본 코팅장치에 관한 본 발명은, 액상의 카본코팅액을 상부로 분사하는 스프레이수단과; 집전체를 가이드하며 상기 스프레이수단 상부로 주행시켜, 집전체에 카본 코팅막이 도포되도록 하는 다수의 롤러와; 집전체의 탭이 형성될 부위를 가려 탭부위에 코팅막이 도포되지 않도록 상기 집전체의 하부에 설치되는 스크리닝수단을 포함하는 것을 특징으로 한다.The present invention relates to a collector carbon coating device for a lithium secondary battery, comprising: spray means for injecting a liquid carbon coating liquid thereon; A plurality of rollers guiding a current collector and driving the upper portion of the spray means to apply a carbon coating film to the current collector; It characterized by including a screening means which is installed on the lower portion of the current collector so as to cover the portion where the tab of the current collector is to be formed so that no coating film is applied to the tab portion.

상기와 같이 이루어지는 본 발명의 리튬 2차전지용 집전체 카본 코팅장치는, 집전체의 해당표면에 액상의 코팅액을 분사하는 방식으로 코팅막을 형성하므로, 전체면에 대해 코팅막이 균일하게 도포됨은 물론 도포의 두께를 여건에 따라 조절할 수 있다. 또한 스크리닝수단으로서, 순환운동하는 벨트스크린을 탭(tab)부 하부에 설치하여 구동하므로, 집전체의 탭(tab)이 형성될 부위에 코팅액이 도포되지 않도록 하는 차단효율이 매우 높다는 효과가 있다.In the current collector carbon coating apparatus for a lithium secondary battery of the present invention made as described above, since the coating film is formed by spraying a liquid coating liquid on the corresponding surface of the current collector, the coating film is uniformly applied to the entire surface as well as The thickness can be adjusted according to the conditions. In addition, as a screening means, since the belt screen circulating is installed and driven under the tab part, there is an effect that the blocking efficiency of preventing the coating liquid from being applied to the site where the tab of the current collector is to be formed is very high.

Description

리튬 2차전지용 집전체 카본 코팅장치{Apparatus for carbon coating on collector of secondary cell}Current collector carbon coating device for lithium secondary battery {Apparatus for carbon coating on collector of secondary cell}

도 1은 본 발명의 일 실시예에 따른 리튬 2차전지용 집전체 카본 코팅장치를 개략적으로 도시한 도면.1 is a view schematically showing a current collector carbon coating apparatus for a lithium secondary battery according to an embodiment of the present invention.

도 2는 상기 집전체와 벨트스크린의 설치위치를 설명하기 위하여 도시한 도 1의 Ⅱ-Ⅱ선의 단면도.FIG. 2 is a cross-sectional view taken along line II-II of FIG. 1 to illustrate the installation positions of the current collector and the belt screen.

도 3은 본 발명의 일 실시예에 따른 리튬 2차전지용 집전체 카본 코팅장치의 집전체에 카본코팅액이 도포된 모습을 도시한 도면.3 is a view showing a state in which a carbon coating liquid is applied to the current collector of the current collector carbon coating apparatus for a lithium secondary battery according to an embodiment of the present invention.

<도면의 주요 부분에 대한 부호의 설명><Explanation of symbols for the main parts of the drawings>

11:케이스 13:건조기11: Case 13: Dryer

15:집전체 17:카본코팅액15: collector 17: carbon coating liquid

19:롤러 21:권출부It is a roller 21: a winding-up part 19

23:권취부 25:탱크23: winding part 25: tank

27:펌프 29:노즐27: pump 29: nozzle

31:용기 33:회수파이프31: container 33: recovery pipe

35:벨트스크린 37:롤러35: Belt screen 37: Roller

39:세정액 41:세정액탱크39: washing liquid 41: washing liquid tank

43:코팅부 45:비코팅부43: coating part 45: uncoated part

47:탭(tab)47: tab

본 발명은 리튬 2차전지에 관한 것으로서 보다 상세하게는 리튬 2차전지의 집전체에 카본막을 코팅하는 리튬 2차전지용 집전체 카본 코팅장치에 관한 것이다.The present invention relates to a lithium secondary battery, and more particularly, to a current collector carbon coating apparatus for a lithium secondary battery for coating a carbon film on a current collector of a lithium secondary battery.

비디오 카메라, 휴대용 전화, 휴대용 PC 등의 휴대용 전자기기의 경량화 및 고기능화가 진행됨에 따라, 그 구동용 전원으로 사용되는 2차 전지에 대해서 많은 연구가 이루어지고 있다. 이 중 가장 많이 사용되고 있는 것으로는 니켈 카드뮴 전지, 니켈 수소 전지, 니켈 아연 전지, 리튬 2차 전지 등이 있다. 이중에서 리튬 2차 전지는 수명이 길고 용량이 크다는 장점을 가지고 있다.As lightweight electronic devices such as video cameras, portable telephones, portable PCs, and the like become lightweight and highly functional, many researches have been conducted on secondary batteries used as driving power sources. Among them, nickel cadmium batteries, nickel hydrogen batteries, nickel zinc batteries, lithium secondary batteries, and the like are most commonly used. Among them, lithium secondary batteries have the advantage of long life and large capacity.

상기 리튬 2차전지는 전해질 종류에 따라 액체 전해질을 사용하는 리튬 금속전지와 리튬 이온전지 및 고분자 고체 전해질을 사용하는 리튬 폴리머전지로 구분할 수 있다. 그리고, 리튬 폴리머전지는 고분자 고체 전해질의 종류에 따라 유기전해액이 전혀 함유되어 있지 않은 완전고체형 리튬 폴리머전지, 유기전해액을 함유하고 있는 겔형 고분자 전해질을 사용하는 리튬 이온 폴리머전지로 나눌 수 있다.The lithium secondary battery may be classified into a lithium metal battery using a liquid electrolyte, a lithium ion battery, and a lithium polymer battery using a polymer solid electrolyte according to the type of electrolyte. The lithium polymer battery may be classified into a fully solid lithium polymer battery containing no organic electrolyte and a lithium ion polymer battery using a gel polymer electrolyte containing an organic electrolyte, depending on the type of polymer solid electrolyte.

공지의 사실과 같이 리튬 2차전지 내부에는, 다수의 극판과, 상기 극판과 접하는 집전체가 구비되는데, 상기 극판과 집전체와의 계면저항을 낮추기 위해 집전체에 카본막을 미리 코팅한다.As is known, a plurality of pole plates and a current collector in contact with the pole plates are provided inside the lithium secondary battery, and a carbon film is coated on the current collector in advance to reduce the interfacial resistance between the pole plates and the current collector.

집전체에 카본막을 생성시키기 위해 수행하는 종래의 방법은, 딥코팅(dip coating) 또는 다이코팅(die coating)에 의하는데, 이러한 방법으로는 집전체의 표면에 코팅막을 균일하게 형성할 수 없다는 한계가 있었다. 특히 집전체의 표면에 구멍이 형성되어 있을 경우에는 코팅액이 구멍을 막을 염려가 있고, 또한 집전체의 탭(tab)부위에 코팅이 되지 않도록 스크리닝하기가 어려웠다.The conventional method performed to produce a carbon film on the current collector is by dip coating or die coating, which is a limitation in that the coating film cannot be uniformly formed on the surface of the current collector. There was. In particular, when a hole is formed on the surface of the current collector, the coating liquid may block the hole, and it is difficult to screen so that the tab portion of the current collector is not coated.

본 발명은 상기와 같은 문제점을 해소하고자 창출한 것으로서, 액상의 카본코팅액을 분사하여 집전체에 코팅막을 형성하므로, 코팅막이 균일하고 집전체 표면에 구멍이 형성되어 있는 경우라도 코팅액이 구멍을 막지 않으며, 또한 별도의 벨트스크린을 집전체의 탭부위에 해당하는 부위의 하부에 설치하여, 탭부위에 코팅막이 형성됨을 막을 수 있도록 구성된 리튬 2차전지용 카본 코팅장치를 제공함에 목적이 있다.The present invention was created to solve the above problems, and since the coating liquid is formed on the current collector by spraying the liquid carbon coating liquid, even if the coating film is uniform and the hole is formed on the surface of the current collector, the coating liquid does not block the hole. Another object of the present invention is to provide a carbon coating apparatus for a lithium secondary battery configured to prevent a coating film from being formed on a tab part by installing a separate belt screen at a lower part corresponding to a tab part of a current collector.

상기 목적을 달성하기 위하여 본 발명은, 액상의 카본코팅액을 상부로 분사하는 스프레이수단과; 일정폭을 갖는 벨트형태의 집전체(15)를 가이드하며 상기 스프레이수단 상부로 주행시켜, 집전체(15)에 카본 코팅막이 도포되도록 하는 다수의 롤러(19)와; 집전체의 탭이 형성될 부위를 가려 상부로 분사되는 액상의 카본코팅액이 탭이 형성될 부위에 도달하지 못하게 함으로써 해당부위에 코팅막이 도포되지 않도록 상기 집전체(15)의 하부에 설치되는 스크리닝수단을 포함하는 것을 특징으로 한다.
또한, 상기 스프레이수단의 측부에는 스프레이수단의 상부를 통과하는 동안 스프레이수단으로부터 분사된 카본코팅액이 그 표면에 도포되어 있는 집전체를 그 내부로 통과시키며 집전체 표면에 코팅되어 있는 코팅막을 건조시키는 건조기(13)가 더 구비되는 것을 특징으로 한다.
또한, 상기 스프레이수단은 액상의 카본코팅액을 저장하고 있는 탱크와; 펌프에 의해 가압된 카본코팅액을 상부로 분사하는 노즐을 포함하는 것을 특징으로 한다.The present invention to achieve the above object, the spray means for injecting a liquid carbon coating liquid to the top; A plurality of rollers 19 for guiding the current collector 15 having a predetermined width and traveling over the spray means to apply a carbon coating film to the current collector 15; Screening means installed in the lower portion of the current collector 15 so as not to apply a coating film on the corresponding portion by covering the portion where the tab of the current collector is to be formed to prevent the liquid carbon coating liquid sprayed to the upper portion to form the tab Characterized in that it comprises a.
In addition, the side of the spray means, while passing through the upper portion of the spray means, the carbon coating liquid sprayed from the spray means passes through the current collector coated on the surface therein, the dryer for drying the coating film coated on the surface of the current collector (13) is further provided.
In addition, the spray means includes a tank for storing a liquid carbon coating liquid; It characterized in that it comprises a nozzle for injecting the carbon coating liquid pressurized by the pump to the top.

삭제delete

아울러, 상기 스크리닝수단은 집전체에 형성될 탭의 길이만큼의 폭을 가지며 순환운동하는 벨트스크린과; 상기 벨트스크린을 지지하며 계속적으로 순환시키는 다수의 롤러와; 내부에 세정액을 수용하고 있으며 롤러가 상기 벨트스크린을 세정액 내부로 통과시킴으로써 세정을 이루도록 하는 세정액탱크를 포함하는 것을 특징으로 한다.In addition, the screening means and the belt screen having a width as long as the length of the tab to be formed on the current collector; A plurality of rollers supporting and continuously circulating the belt screen; The cleaning liquid is contained therein, and the roller comprises a cleaning liquid tank for cleaning by passing the belt screen into the cleaning liquid.

이하, 본 발명을 첨부된 도면을 참조하여 보다 상세히 설명하기로 한다.Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings.

도 1은 본 발명의 일 실시예에 따른 액상의 리튬 2차전지용 집전체 카본 코팅장치의 구성을 개략적으로 도시한 도면이다.1 is a view schematically showing the configuration of the current collector carbon coating apparatus for a liquid lithium secondary battery according to an embodiment of the present invention.

도면을 참조하면, 본 실시예에 따른 리튬 2차전지용 집전체 카본 코팅장치는, 케이스(11)와, 상기 케이스(11)의 측부에 설치되는 건조기(13)와, 벨트형태의 집전체(15)를 마치 콘베이어벨트처럼 케이스(11) 및 건조기(13)를 수평으로 통과시키는 다수의 롤러(19)를 포함한다. 상기 집전체(15)는 권출부(21)와 권취부(23)에 감겨있어, 권출부(21) 및 권취부(23)의 회전에 따라 화살표 a방향으로 이동한다. Referring to the drawings, the current collector carbon coating apparatus for a lithium secondary battery according to the present embodiment includes a case 11, a dryer 13 installed at a side of the case 11, and a current collector 15 in a belt form. It includes a plurality of rollers 19 to pass through the case 11 and the dryer 13 horizontally as if the conveyor belt. The current collector 15 is wound around the take-up part 21 and the take-up part 23 and moves in the direction of arrow a in accordance with the rotation of the take-up part 21 and the take-up part 23.

상기 케이스(11)의 내부에는 스프레이(spray)수단과 스크리닝(screening)수단이 장치되어 있다. 상기 스프레이수단 및 스크리닝수단은 주행하는 집전체(15)의 하부에 위치한다.Inside the case 11, spray means and screening means are provided. The spray means and the screening means are located under the current collector 15 that travels.

상기 스프레이수단은, 롤러(19)에 의해 가이드되며 수평으로 주행하는 집전체(15)의 저면에 노즐(29)을 통해 카본코팅액(17)을 분사하는 장치이다. 이는 액상 의 카본코팅액을 저장하는 탱크(25)와, 탱크(25)의 카본코팅액을 상부로 분사하는 노즐(29)과, 탱크(25)의 카본코팅액을 노즐(29)로 공급하는 펌프(27)을 포함하여 구성된다. The spray means is a device for injecting the carbon coating liquid 17 through the nozzle 29 to the bottom surface of the current collector 15 which is guided by the roller 19 and run horizontally. This includes a tank 25 for storing a liquid carbon coating liquid, a nozzle 29 for spraying the carbon coating liquid of the tank 25 upwards, and a pump 27 for supplying the carbon coating liquid of the tank 25 to the nozzle 29. It is configured to include).

상기 노즐(29)은 용기(31)의 내부에 설치된다. 상기 용기(31)는 노즐(29)로부터 분사되었으나 집전체(15)에 도포되지 않아 하부로 낙하한 카본코탱액(17)을 임시로 저장한다. 또한 상기 용기(31)는 회수파이프(33)를 통해 탱크(25)와 연결된다. 따라서 스프레이수단의 작동중 하부로 낙하하여 모인 카본코팅액(17)은 회수파이프(33)를 통해 탱크(25)로 회수된다. The nozzle 29 is installed inside the container 31. The container 31 is sprayed from the nozzle 29, but is not applied to the current collector 15 to temporarily store the carbon cotan liquid 17 that has fallen to the bottom. In addition, the container 31 is connected to the tank 25 through the recovery pipe 33. Therefore, the carbon coating liquid 17 collected and dropped to the lower side during the operation of the spray means is recovered to the tank 25 through the recovery pipe 33.

상기 노즐의 팁부위의 분사구의 형상은 다양한 형상을 취할 수 있으며, 바람직하기로는 원형이나 사각형 또는 I자형의 형태를 취할 수 있다. 또한, 상기 노즐의 분사는 연속적으로 수행될 수 있고 또는 간격을 가지고 비연속식으로 수행될 수 도 있다. 이러한 분사방식은 펌프의 제어에 의해 이루어진다.The shape of the injection port at the tip of the nozzle may take a variety of shapes, preferably in the form of a circle, a square or an I-shape. In addition, the spraying of the nozzle may be performed continuously or may be performed discontinuously at intervals. This injection method is made by the control of the pump.

아울러 본 발명의 코팅장치는 분사방식을 취하므로, 코팅액의 도포 두께를 적절히 조절할 수 있음은 물론 도포의 두께가 전체 면적에 걸쳐 균일하다. 본 출원인의 실험에 의하면 도포 두께의 편차는 불과 ±1㎛에 그침을 알 수 있었다.In addition, since the coating apparatus of the present invention takes a spray method, the coating thickness of the coating liquid can be appropriately adjusted, and the thickness of the coating is uniform over the entire area. Applicants' experiment showed that the variation in coating thickness was only ± 1 μm.

한편, 상기 집전체(15)에 분사되는 카본코팅액(17)은 스크리닝수단에 의해 스크리닝되어 가려지는 해당부위에는 카본코팅액의 도포가 이루어지지 않는다. On the other hand, the carbon coating liquid 17 that is sprayed on the current collector 15 is not applied to the carbon coating liquid to the portion that is screened and screened by the screening means.

상기 스크리닝수단은 다수의 롤러(37)에 의해 가이드되며 계속적으로 순환하는 벨트스크린(35)과, 상기 벨트스크린(35)을 통과시켜 표면에 뭍어있는 카본코팅액을 제거하기위한 세정액(39)을 포함한다. 상기 세정액(39)는 세정액탱크(41)내에 저장되어 있음은 물론이다. 아울러, 세정액탱크(41)내에 브러시(미도시)를 설치하여 벨트스크린(35)의 세정을 보다 효율적으로 수행할 수 도 있다.The screening means includes a belt screen 35 guided by a plurality of rollers 37 and continuously circulated, and a cleaning liquid 39 for removing the carbon coating liquid adhering to the surface by passing through the belt screen 35. do. Of course, the cleaning liquid 39 is stored in the cleaning liquid tank 41. In addition, a brush (not shown) may be installed in the cleaning liquid tank 41 to more efficiently perform the cleaning of the belt screen 35.

상기 벨트스크린(35)의 용기(31)의 상부에 위치하는 수평주행부는 집전체(15)와 접한 상태로 주행하도록 한다. 또한 집전체(15)의 주행속도와 벨트스크린(35)의 화살표 b방향 이동속도는 동일하게 조정하여, 주행하고 있는 벨트스크린(35)과 집전체(15)의 사이에는 카본코팅액이 침투하지 못한다. The horizontal running portion located above the container 31 of the belt screen 35 allows the vehicle to run in contact with the current collector 15. In addition, the moving speed of the current collector 15 and the moving speed in the direction of the arrow b of the belt screen 35 are equally adjusted, so that the carbon coating liquid does not penetrate between the running belt screen 35 and the current collector 15. .

상기 케이스(11)의 측부에 구비되어 있는 건조기(13)는, 케이스(11)를 통과하여 카본코팅액에 의해 젖어있는 집전체(15)를 건조시킨다. 상기 건조기(13)의 건조방식은 전기나 스팀등의 방식을 채용할 수 있으나, 다른 건조방식을 취할 수 도 있음은 물론이다.The dryer 13 provided in the side of the case 11 passes through the case 11 to dry the current collector 15 that is wet by the carbon coating liquid. The drying method of the dryer 13 may be a method such as electricity or steam, but may also take a different drying method.

도 2는 상기 도 1의 Ⅱ-Ⅱ선 단면도이다.FIG. 2 is a cross-sectional view taken along the line II-II of FIG. 1.

도면을 참조하면, 상기 벨트스크린(35)의 폭(w)은 집전체(15)의 폭보다 작으며 집전체(15)의 일측 에지(edge)부의 하부에 위치함을 알 수 있다. 상기 에지부는집전체를 전지크기로 절단하였을 때 전극의 역할을 하는 탭(tab)이 형성되는 부위이다. 공지의 사실과 같이 집전체의 탭(tab)부는 전극의 역할을 하는 것으로 카본코팅을 하지 않는다. 따라서 집전체(15) 에지부 하부에 스크리닝수단을 두어 탭부에 해당하는 영역이 코팅됨을 방지하는 것이다. Referring to the drawings, it can be seen that the width w of the belt screen 35 is smaller than the width of the current collector 15 and is located below one side edge of the current collector 15. The edge portion is a portion where a tab, which serves as an electrode, is formed when the current collector is cut to a battery size. As is known, the tab portion of the current collector serves as an electrode and does not have carbon coating. Therefore, the screening means is placed under the edge of the current collector 15 to prevent the area corresponding to the tab portion from being coated.

도 3은 본 발명의 일 실시예에 따른 리튬 2차전지용 집전체 카본 코팅장치에 의해 도포가 완료된 집전체를 부분 도시한 사시도이다.Figure 3 is a perspective view showing a part of the current collector is complete coating by the current collector carbon coating apparatus for a lithium secondary battery according to an embodiment of the present invention.

도시한 바와같이, 집전체(15)에 코팅부(43)와 비코팅부(45)가 나뉘어져 있 다. 상기 코팅부(43)는 노즐(29)로부터 분사되는 카본코팅액(17)이 도포된 영역이고, 비코팅부(45)는 벨트스크린(35)에 의해 가려져 코팅액이 도포되지 않은 영역이다. 따라서 상기 집전체(15)를 일정크기로 절단하여, 코팅부(43)는 전극극판과 접하도록 조립하고 비코팅부(45)에는 전지의 전극으로 사용되는 탭(47,tab)부를 형성한다.As shown, the coating portion 43 and the uncoated portion 45 is divided into the current collector 15. The coating part 43 is an area to which the carbon coating liquid 17 sprayed from the nozzle 29 is applied, and the non-coating part 45 is covered by the belt screen 35 so that the coating liquid is not applied. Accordingly, the current collector 15 is cut to a certain size, and the coating portion 43 is assembled to contact the electrode plate, and the uncoated portion 45 forms tabs 47 used as electrodes of the battery.

상기와 같이 이루어지는 본 발명의 리튬 2차전지용 집전체 카본 코팅장치의 작동은 다음과 같이 이루어진다.Operation of the current collector carbon coating apparatus for a lithium secondary battery of the present invention made as described above is made as follows.

먼저, 벨트형태로 가공되어 권출부(21)에 감겨있는 집전체(15)가 화살표 a방향으로 주행하여 케이스(11)의 내부를 통과하는 동안, 케이스(11)내부에 설치되어 있는 스프레이수단 및 스크리닝수단이 작동한다. 즉, 스프레이수단의 노즐(29)을 통해 액상의 카본코팅액(17)이 상부로 분사되어, 주행하고 있는 집전체(15)의 표면을 코팅한다. 이와동시에 스크리닝수단도 작동하여 벨트스크린(35)이 화살표 b방향으로 순환하면서, 집전체(15)의 탭(tab)부에 코팅액이 도포되지 않도록 한다. 상기한 바와같이, 집전체(15)와 벨트스크린(35)은 상호 접하고 주행속도는 동일하게 조절되어 있으므로, 집전체(15)와 벨트스크린(35) 사이에는 코팅액이 도포되지 않는 것이다.First, the spray means provided inside the case 11 while the current collector 15 processed in the form of a belt and wound around the unwinding part 21 runs in the direction of arrow a to pass through the inside of the case 11; The screening means is activated. That is, the liquid carbon coating liquid 17 is sprayed upward through the nozzle 29 of the spray means to coat the surface of the current collector 15 that is running. At the same time, the screening means also operates to prevent the coating liquid from being applied to the tab portion of the current collector 15 while the belt screen 35 is circulated in the direction of the arrow b. As described above, since the current collector 15 and the belt screen 35 are in contact with each other and the traveling speed is controlled to be the same, the coating liquid is not applied between the current collector 15 and the belt screen 35.

상기 케이스(11)를 통과하면서 일정영역에 코팅액이 도포된 집전체(15)는, 건조기(13)를 통과하면서 건조된 후 권취부(23)로 이동하여 감겨진다.The current collector 15 coated with a coating liquid in a predetermined region while passing through the case 11 is dried while passing through the dryer 13 and then wound around the winding unit 23.

이상, 본 발명을 구체적인 실시예를 통하여 상세하게 설명하였으나, 본 발명은 상기 실시예에 한정하지 않고, 본 발명의 기술적 사상의 범위내에서 통상의 지 식을 가진 자에 의하여 여러 가지 변형이 가능하다.As mentioned above, although this invention was demonstrated in detail through the specific Example, this invention is not limited to the said Example, A various deformation | transformation is possible for a person with ordinary knowledge within the scope of the technical idea of this invention. .

상기와 같이 이루어지는 본 발명의 리튬 2차전지용 집전체 카본 코팅장치는, 집전체의 해당표면에 액상의 코팅액을 분사하는 방식으로 코팅막을 형성하므로, 전체면에 대해 코팅막이 균일하게 도포됨은 물론 도포의 두께를 여건에 따라 조절할 수 있다. 또한 스크리닝수단으로서, 순환운동하는 벨트스크린을 탭(tab)부 하부에 설치하여 구동하므로, 집전체의 탭(tab)이 형성될 부위에 코팅액이 도포되지 않도록 하는 차단효율이 매우 높다는 효과가 있다.In the current collector carbon coating apparatus for a lithium secondary battery of the present invention made as described above, since the coating film is formed by spraying a liquid coating liquid on the corresponding surface of the current collector, the coating film is uniformly applied to the entire surface as well as The thickness can be adjusted according to the conditions. In addition, as a screening means, since the belt screen circulating is installed and driven under the tab part, there is an effect that the blocking efficiency of preventing the coating liquid from being applied to the site where the tab of the current collector is to be formed is very high.

Claims (4)

액상의 카본코팅액을 상부로 분사하는 스프레이수단과;Spray means for injecting a liquid carbon coating liquid upward; 일정폭을 갖는 벨트형태의 집전체(15)를 가이드하며 상기 스프레이수단 상부로 주행시켜, 집전체(15)에 카본 코팅막이 도포되도록 하는 다수의 롤러(19)와;A plurality of rollers 19 for guiding the current collector 15 having a predetermined width and traveling over the spray means to apply a carbon coating film to the current collector 15; 집전체의 탭이 형성될 부위를 가려 상부로 분사되는 액상의 카본코팅액이 탭이 형성될 부위에 도달하지 못하게 함으로써 해당부위에 코팅막이 도포되지 않도록 상기 집전체(15)의 하부에 설치되는 스크리닝수단을 포함하는 것을 특징으로 하는 리튬 2차전지용 집전체 카본 코팅장치.Screening means installed in the lower portion of the current collector 15 so as not to apply a coating film on the corresponding portion by covering the portion where the tab of the current collector is to be formed to prevent the liquid carbon coating liquid sprayed to the upper portion to form the tab Current collector carbon coating apparatus for a lithium secondary battery, comprising a. 제 1항에 있어서, The method of claim 1, 상기 스프레이수단의 측부에는 스프레이수단의 상부를 통과하는 동안 스프레이수단으로부터 분사된 카본코팅액이 그 표면에 도포되어 있는 집전체를 그 내부로 통과시키며 집전체 표면에 코팅되어 있는 코팅막을 건조시키는 건조기(13)가 더 구비되는 것을 특징으로 하는 리튬 2차전지용 집전체 카본 코팅장치.While passing through the upper portion of the spray means on the side of the spray means, a carbon coating liquid sprayed from the spray means passes through the current collector coated on the surface thereof, and a dryer for drying the coating film coated on the surface of the current collector (13). Collector carbon coating device for a lithium secondary battery, characterized in that is further provided. 제 1항에 있어서, 상기 스프레이수단은 액상의 카본코팅액을 저장하고 있는 탱크(25)와; 펌프(27)에 의해 가압된 카본코팅액을 상부로 분사하는 노즐(29)을 포함하는 것을 특징으로 하는 리튬 2차전지용 집전체 카본 코팅장치.The spray device of claim 1, further comprising: a tank (25) for storing a liquid carbon coating liquid; Collector carbon coating apparatus for a lithium secondary battery, characterized in that it comprises a nozzle (29) for spraying the carbon coating liquid pressurized by the pump (27) to the top. 제 1항에 있어서, 상기 스크리닝수단은 집전체(15)에 형성될 탭의 길이만큼의 폭을 가지며 순환운동하는 벨트스크린(35)과; 상기 벨트스크린(35)을 지지하며 계속적으로 순환시키는 다수의 롤러(37)와; 내부에 세정액(39)을 수용하고 있으며 롤러가 상기 벨트스크린(35)을 세정액 내부로 통과시킴으로써 세정을 이루도록 하는 세정액탱크(41)를 포함하는 것을 특징으로 하는 리튬 2차전지용 집전체 카본 코팅장치.2. The screen according to claim 1, wherein the screening means includes: a belt screen (35) having a width equal to the length of the tab to be formed in the current collector (15); A plurality of rollers 37 supporting the belt screen 35 and continuously circulating; And a cleaning liquid tank (41) for accommodating the cleaning liquid (39) therein and having a roller pass the belt screen (35) into the cleaning liquid to perform cleaning.
KR1019990050587A 1999-11-15 1999-11-15 Apparatus for carbon coating on collector of secondary cell KR100603268B1 (en)

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KR100767781B1 (en) 2006-03-20 2007-10-18 주식회사 메이드 A manufacturing process for carbon fiber

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US20110189378A1 (en) * 2010-02-04 2011-08-04 Moon So-Ii Apparatus and method for coating a functional layer
CN111905963A (en) * 2020-06-30 2020-11-10 安徽南都华铂新材料科技有限公司 Button cell production coating equipment and use method thereof

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Publication number Priority date Publication date Assignee Title
KR100767781B1 (en) 2006-03-20 2007-10-18 주식회사 메이드 A manufacturing process for carbon fiber

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