KR100477735B1 - Active material slurry coating device for secondary batteries - Google Patents
Active material slurry coating device for secondary batteries Download PDFInfo
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- KR100477735B1 KR100477735B1 KR10-1998-0036616A KR19980036616A KR100477735B1 KR 100477735 B1 KR100477735 B1 KR 100477735B1 KR 19980036616 A KR19980036616 A KR 19980036616A KR 100477735 B1 KR100477735 B1 KR 100477735B1
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/04—Processes of manufacture in general
- H01M4/0402—Methods of deposition of the material
- H01M4/0419—Methods of deposition of the material involving spraying
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/04—Processes of manufacture in general
- H01M4/0402—Methods of deposition of the material
- H01M4/0404—Methods of deposition of the material by coating on electrode collectors
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- General Chemical & Material Sciences (AREA)
- Battery Electrode And Active Subsutance (AREA)
Abstract
목적 : 도포부의 끝처리를 매끄럽게 하여 활물질이 일정한 두께로 도포되도록 하는 활물질 슬러리 도포장치를 제공한다.OBJECT: To provide an active material slurry coating apparatus for smoothing the finish treatment of the coating unit so that the active material is applied to a certain thickness.
구성 : 코터 헤드(24)에 저장되는 활물질 슬러리(22)가 노즐(26)을 통해 배출되어 양음극 기재(20)에 도포됨으로써 전극을 형성하게 되는 이차전지용 활물질 슬러리 도포장치에서, 코터 헤드(24)의 인접한 위치에 에어를 분사하는 에어 노즐(32)이 설치되고, 이(32)에 제어수단(36)으로 작동되는 에어 펌프(34)가 연결되는 구조로 이루어진다.Composition: In the active material slurry coating apparatus for secondary batteries in which the active material slurry 22 stored in the coater head 24 is discharged through the nozzle 26 and applied to the positive electrode substrate 20 to form an electrode. An air nozzle 32 for injecting air is installed at an adjacent position of), and an air pump 34 operated by the control means 36 is connected to the air nozzle 32.
효과 : 활물질의 탈락을 방지할 수 있고 전지의 충방전에 따른 리튬 금속의 석출을 줄일 수 있다.Effect: It is possible to prevent the dropping of the active material and to reduce the precipitation of lithium metal due to the charge and discharge of the battery.
Description
본 발명은 이차전지용 활물질 슬러리 도포장치에 관한 것으로서, 더 상세하게는 양음극 기재에 도포되는 활물질의 끝부분 처리를 말끔히 하고 두께를 일정하게 유지할 수 있는 활물질 슬러리 도포장치에 관한 것이다.The present invention relates to an active material slurry coating apparatus for secondary batteries, and more particularly, to an active material slurry coating apparatus capable of smoothing the end treatment of the active material applied to the positive electrode substrate and maintaining a constant thickness.
잘 알려진 바와 같이, 이차전지는 도전성을 갖는 전해액에 활물질이 도포된 양극과 음극을 삽입하고, 이 양극과 음극을 연결했을 때 전해액과 활물질 사이에서 발생하는 전기화학적 반응을 이용한 전지인데, 기존의 1차 전지와 달리 전자 전기제품에서 소모된 에너지를 충전기에 의해 재충전하여 반복 사용할 수 있는 충전과 방전이 가능한 전지로써 포터블화하는 전자 전기제품과 더불어 널리 사용되고 있다.As is well known, a secondary battery is a battery using an electrochemical reaction generated between an electrolyte and an active material when an anode and a cathode coated with an active material are inserted into a conductive electrolyte, and the anode and the cathode are connected. Unlike the secondary battery, the energy consumed in the electronic and electrical appliances is widely used together with the electronic and electrical appliances that can be recharged and recharged by a charger as a battery that can be repeatedly used.
이차전지에 사용되는 전극의 제조는, 박판의 리튬, 알루미늄, 니켈, 구리 등으로 이루어진 양음극 기재(substrate) 위에 바인더, 도전제가 혼합된 활물질 슬러리를 일정두께로 도포한 후 고온의 로(爐)에서 건조한 다음, 롤 프레싱하여 얻어진다.In the manufacture of the electrode used in the secondary battery, a high-temperature furnace after applying a slurry of an active material slurry mixed with a binder and a conductive agent on a positive electrode substrate made of thin lithium, aluminum, nickel, copper, etc. to a certain thickness. It is obtained by drying in a roll, followed by roll pressing.
도 3에서는 양음극 기재에 활물질을 도포하는 장치를 나타내고 있다.In FIG. 3, the apparatus which apply | coats an active material to a positive electrode base material is shown.
도시 생략된 혼합기에서 활물질과 바인더, 도전제 및 용매를 혼합 교반하여 슬러리를 형성하고, 이 슬러리를 시브로 통과시켜 입자경이 굵은 것을 걸러낸 다음, 도면에서와 같은 코터 헤드(2)에 주입한다.In the mixer (not shown), the active material, the binder, the conductive agent, and the solvent are mixed and stirred to form a slurry. The slurry is passed through a sieve to filter out the coarse particle diameter, and then injected into the coater head 2 as shown in the drawing.
이어서, 이송수단에 의해 이동되는 양음극 기재(4) 위로 코터 헤드(2)의 노즐(6)을 통해 활물질 슬러리(8)를 배출하여 일정한 두께로 도포되도록 하는 것이며, 이 때 간헐적으로 활물질 슬러리(8)를 배출하여 양음극 기재(4)에 도포부(10)와 미도포부(12)로 구분되게 함으로써 추후 공정에서 미도포부(12)를 절단하여 하나의 전극을 형성한다.Subsequently, the active material slurry 8 is discharged through the nozzle 6 of the coater head 2 onto the positive electrode substrate 4 moved by the conveying means so as to be coated with a constant thickness. 8) discharged so that the positive electrode substrate 4 is divided into the coating portion 10 and the uncoated portion 12, and the uncoated portion 12 is cut in a later step to form one electrode.
그러나, 상술한 방식으로 활물질 슬러리(8)를 도포하게 되었을 때, 도 4에 도시한 바와 같이 도포부(10)의 끝부분 처리가 매끄럽지 못하고 파형을 형성하거나 방울이 지게 되어 균일한 도포가 이루어지지 못하고, 이는 전지의 충방전시 두께가 불균일한 전극에서의 리튬을 석출시키는 원인이 되어 충방전 성능을 저하시키게 된다.However, when the active material slurry 8 is applied in the above-described manner, as shown in FIG. 4, the end portion treatment of the coating portion 10 is not smooth and waveforms are formed or drops are not uniformly applied. This causes the lithium to be deposited at the electrode having a non-uniform thickness during charging and discharging of the battery, thereby lowering the charging and discharging performance.
또한, 방울로 남게 된 활물질 반복되는 충방전에 의해 기재에서 탈락하여 전지의 쇼트의 원인이 되는 것이다.In addition, the active material left in a drop is eliminated from the substrate by repeated charging and discharging to cause a short circuit of the battery.
이와 같은 문제점을 해결하기 위해서 본 발명은 도포부의 끝처리를 매끄럽게 하여 활물질이 일정한 두께로 도포되도록 하는 활물질 슬러리 도포장치를 제공하는 것이 목적이다.In order to solve such a problem, an object of the present invention is to provide an active material slurry coating device for smoothing the finish treatment of the coating unit so that the active material is applied to a certain thickness.
이를 위하여, 코터 헤드의 인접한 위치에 에어를 분사하는 에어 노즐이 설치되고, 이에 제어수단으로 조정되는 에어 펌프가 연결되는 구조로 이루어진다.To this end, an air nozzle for injecting air is installed at an adjacent position of the coater head, and the air pump adjusted by the control means is connected thereto.
특히, 상기 에어 노즐은 상기 양음극 기재가 이동되는 방향과 동일한 방향으로 에어를 분사할 수 있다.In particular, the air nozzle may inject air in the same direction as the direction in which the cathode substrate is moved.
또한, 상기 에어가 양음극 기재의 도포부와 미도포부의 경계선 상으로 집중되도록 할 수도 있다.In addition, the air may be concentrated on the boundary between the coated portion and the uncoated portion of the positive electrode substrate.
아울러, 상기 제어수단은 코터 헤드의 노즐과 연결될 수 있는 것이다.In addition, the control means may be connected to the nozzle of the coater head.
이하 본 발명에 따른 바람직한 실시예를 첨부된 도면에 의거하여 상세히 설명한다.Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.
도 1은 본 발명에 관련된 이차전지용 활물질 슬러리 도포장치를 개략적으로 도시한 사시도이고, 도 2는 활물질 슬러리 도포장치를 측면에서 도시한 도면이다.1 is a perspective view schematically showing an active material slurry coating device for a secondary battery according to the present invention, Figure 2 is a view showing the active material slurry coating device from the side.
도면 부호 20은 양극 기재 혹은 음극 기재를 나타내며, 이는 리튬, 알루미늄, 니켈, 구리 등의 전도성이 양호한 박판으로 제조되어 롤 상태에서 테이크 업되는 것이다.Reference numeral 20 denotes a positive electrode substrate or a negative electrode substrate, which is made of a thin plate having good conductivity such as lithium, aluminum, nickel, copper, and the like and is taken up in a roll state.
이러한 양음극 기재(20)에 활물질을 일정한 두께로 도포한 다음 고온의 건조기에서 건조시키고 롤 프레싱하여 압착한 후 적절한 길이로 절단하여 전극으로 사용하게 되는 것이다.The positive electrode substrate 20 is coated with an active material in a predetermined thickness, dried in a high temperature dryer, roll pressed, pressed, and then cut into an appropriate length to be used as an electrode.
상기 활물질은 도시 생략된 혼합기에서 바인더와, 도전제 및 용매가 혼합된 상태로 교반되어져 슬러리(22)를 형성하며, 이 슬러리(22)는 시브(sieve)나 다이아프램(diaphragm)을 통과하면서 필터링되어 분산도를 높인 다음, 코터 헤드(24)로 옮겨진다.The active material is stirred in a state in which a binder, a conductive agent and a solvent are mixed in a mixer (not shown) to form a slurry 22, and the slurry 22 is filtered while passing through a sieve or a diaphragm. The dispersion degree is increased, and then transferred to the coater head 24.
상기 코터 헤드(24)의 하단에는 노즐(26)이 형성되어 그 내부에 담겨진 활물질 슬러리를 하방으로 배출시키게 되며, 이 때 노즐(26)의 개폐가 제어수단에 의해 조절됨으로써 테이크 업된 채 이송되는 양음극 기재(20)의 상면에 간헐적으로 활물질 슬러리(22)를 배출하게 된다. 이에 따라, 양음극 기재(20)에는 활물질 슬러리(22)가 도포되는 도포부(28)와 그렇치 않은 미도포부(30)를 형성하게 되는 것이다.A nozzle 26 is formed at the lower end of the coater head 24 to discharge the active material slurry contained therein downward, and at this time, the opening and closing of the nozzle 26 is controlled by a control means so that the amount transferred is taken up. The active material slurry 22 is intermittently discharged to the upper surface of the negative electrode substrate 20. As a result, the positive electrode substrate 20 is provided with an application portion 28 to which the active material slurry 22 is applied and an uncoated portion 30 which are not.
한편, 상기 도포부(28)와 미도포부(30)의 경계선 상으로 에어를 분사시키는 에어 노즐(32)이 코터 헤드(24)의 인접한 위치에 설치되는데, 특히 코터 헤드(24)를 기준으로 활물질 슬러리(22)가 도포되기 전인 전처리 위치에 설치되어지고, 에어 노즐(32)에는 에어를 공급하는 에어 펌프(34)가 연결된다.On the other hand, the air nozzle 32 for injecting air on the boundary line between the coating portion 28 and the uncoated portion 30 is installed in the adjacent position of the coater head 24, in particular the active material based on the coater head 24 The slurry 22 is installed at a pretreatment position before application, and an air pump 34 for supplying air is connected to the air nozzle 32.
상기 에어 펌프(34)는 상술한 코터 헤드 노즐(26)의 개폐를 조절하는 제어수단(36)과 연결되어 상기 노즐(26)이 잠겨지는 순간 작동하게 되고, 이는 에어 노즐(32)에서 에어가 분사되어 양음극 기재(20)의 도포부(28)와 미도포부(30)의 경계선으로 집중되도록 하는 것이다.The air pump 34 is connected to the control means 36 for controlling the opening and closing of the coater head nozzle 26 described above to operate the moment the nozzle 26 is locked, which means that air in the air nozzle 32 It is sprayed so as to be concentrated at the boundary between the application portion 28 and the uncoated portion 30 of the positive electrode substrate 20.
이 때, 상기 에어 노즐의 폭은 상기 활물질 슬러리가 도포되는 폭에 좌우되며, 특히 에어의 분사력이 도포부와 미도포부의 경계선에 균형되도록 하여 도포부의 끝처리가 매끄럽게 되도록 한다.At this time, the width of the air nozzle depends on the width to which the active material slurry is applied, and in particular, the injection force of the air is balanced on the boundary line between the coating portion and the uncoated portion to smooth the finish treatment of the coating portion.
이상에서 살펴본 바와 같이 본 발명에 따른 실시예는 종래의 문제점을 실질적으로 해소하고 있다.As described above, the embodiment of the present invention substantially solves the conventional problems.
즉, 양음극 기재의 도포부와 미도포부의 경계선 상으로 에어를 분사시킴으로써 도포부의 끝처리를 매끄럽게 할 수 있게 되어 전극 형성 후 전지의 내부에서 충방전시 활물질의 탈락을 방지함에 따라 전지의 쇼트에 따른 불량율를 감소시킬 수 있다.In other words, by spraying air on the boundary between the coated portion and the uncoated portion of the positive electrode substrate, it is possible to smooth the finish treatment of the coated portion, which prevents the active material from falling off during charging and discharging in the battery after electrode formation. The defective rate can be reduced.
또한, 도포부의 끝처리가 매끄럽게 되는 것은 전지의 반복되는 충방전시 리튬 금속 석출을 줄일 수 있어 전지의 성능을 향상시키는 것이다.In addition, smooth finish treatment of the coating unit may reduce lithium metal precipitation during repeated charge and discharge of the battery, thereby improving performance of the battery.
도 1은 본 발명에 관련된 이차전지용 활물질 슬러리 도포장치를 개략적으로 도시한 사시도.1 is a perspective view schematically showing an active material slurry coating device for a secondary battery according to the present invention.
도 2는 활물질 슬러리 도포장치를 측면에서 도시한 도면.Figure 2 is a side view of the active material slurry coating device.
도 3은 종래의 활물질 슬러리 도포장치를 도시한 측면도.Figure 3 is a side view showing a conventional active material slurry coating device.
도 4는 종래 활물질 슬러리가 양음극 기재에 도포된 상태를 도시한 평면도.4 is a plan view showing a state where a conventional active material slurry is applied to a positive electrode substrate.
* 도면의 주요 부분에 대한 부호의 설명 *Explanation of symbols on the main parts of the drawings
20 : 양음극 기재 22 : 활물질 슬러리20: positive electrode substrate 22: active material slurry
24 : 코터 헤드 26 : 노즐24: coater head 26: nozzle
28 : 도포부 30 : 미도포부28: coating portion 30: uncoated portion
32 : 에어 노즐 34 : 에어 펌프32: air nozzle 34: air pump
36 : 제어수단36 control means
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| Application Number | Priority Date | Filing Date | Title |
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| KR10-1998-0036616A KR100477735B1 (en) | 1998-09-05 | 1998-09-05 | Active material slurry coating device for secondary batteries |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR10-1998-0036616A KR100477735B1 (en) | 1998-09-05 | 1998-09-05 | Active material slurry coating device for secondary batteries |
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| Publication Number | Publication Date |
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| KR20000018833A KR20000018833A (en) | 2000-04-06 |
| KR100477735B1 true KR100477735B1 (en) | 2005-06-08 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100659837B1 (en) | 2005-11-29 | 2006-12-19 | 삼성에스디아이 주식회사 | Method of coating electrode materials for secondary battery and apparatus for the same |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100477738B1 (en) * | 1998-12-29 | 2005-06-08 | 삼성에스디아이 주식회사 | Active Material Slurry Coating Equipment for Secondary Battery |
| KR100846580B1 (en) * | 2002-09-05 | 2008-07-16 | 삼성에스디아이 주식회사 | Apparatus for coating slurry on a substrate |
| JP2008149223A (en) * | 2006-12-15 | 2008-07-03 | Chugai Ro Co Ltd | Coating apparatus |
| KR102116676B1 (en) * | 2016-02-25 | 2020-05-29 | 주식회사 엘지화학 | Method for Preparing Electrode for Secondary Battery and Device for Manufacturing the Same |
| KR102175388B1 (en) * | 2016-02-25 | 2020-11-06 | 주식회사 엘지화학 | Method for Preparing Electrode for Secondary Battery and Device for Manufacturing the Same |
| KR20220041325A (en) | 2020-09-25 | 2022-04-01 | 주식회사 엘지에너지솔루션 | Slot die comprising a member that prevents the occurrence of drag lines and device for manufacturing electrode comprising the same |
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| JPH07195013A (en) * | 1994-01-12 | 1995-08-01 | Sankyo Alum Ind Co Ltd | Adhesive coater |
| JPH091033A (en) * | 1995-06-23 | 1997-01-07 | Ishikawajima Harima Heavy Ind Co Ltd | Coating machine |
| JPH0929155A (en) * | 1995-07-21 | 1997-02-04 | Tokyo Ohka Kogyo Co Ltd | Coating nozzle and coater with same |
| KR970008700A (en) * | 1995-07-27 | 1997-02-24 | 윤종용 | Method for manufacturing battery plate and active material peeling device of the plate |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07195013A (en) * | 1994-01-12 | 1995-08-01 | Sankyo Alum Ind Co Ltd | Adhesive coater |
| JPH091033A (en) * | 1995-06-23 | 1997-01-07 | Ishikawajima Harima Heavy Ind Co Ltd | Coating machine |
| JPH0929155A (en) * | 1995-07-21 | 1997-02-04 | Tokyo Ohka Kogyo Co Ltd | Coating nozzle and coater with same |
| KR970008700A (en) * | 1995-07-27 | 1997-02-24 | 윤종용 | Method for manufacturing battery plate and active material peeling device of the plate |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100659837B1 (en) | 2005-11-29 | 2006-12-19 | 삼성에스디아이 주식회사 | Method of coating electrode materials for secondary battery and apparatus for the same |
Also Published As
| Publication number | Publication date |
|---|---|
| KR20000018833A (en) | 2000-04-06 |
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