KR19980031869A - Battery manufacturing method - Google Patents
Battery manufacturing method Download PDFInfo
- Publication number
- KR19980031869A KR19980031869A KR1019960051433A KR19960051433A KR19980031869A KR 19980031869 A KR19980031869 A KR 19980031869A KR 1019960051433 A KR1019960051433 A KR 1019960051433A KR 19960051433 A KR19960051433 A KR 19960051433A KR 19980031869 A KR19980031869 A KR 19980031869A
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- South Korea
- Prior art keywords
- negative electrode
- surface treatment
- treatment material
- battery
- coating
- Prior art date
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 14
- 239000000463 material Substances 0.000 claims abstract description 32
- 238000004381 surface treatment Methods 0.000 claims abstract description 26
- 238000000576 coating method Methods 0.000 claims abstract description 19
- 239000011248 coating agent Substances 0.000 claims abstract description 16
- 238000000151 deposition Methods 0.000 claims abstract description 13
- 238000000034 method Methods 0.000 claims abstract description 12
- 239000002904 solvent Substances 0.000 claims abstract description 12
- 239000011149 active material Substances 0.000 claims abstract description 9
- 238000001035 drying Methods 0.000 claims abstract description 9
- 230000008021 deposition Effects 0.000 claims abstract description 7
- 239000006185 dispersion Substances 0.000 claims abstract description 6
- 238000002360 preparation method Methods 0.000 claims abstract description 3
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 2
- 230000000149 penetrating effect Effects 0.000 abstract description 3
- 239000002270 dispersing agent Substances 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 239000007921 spray Substances 0.000 description 3
- 239000012756 surface treatment agent Substances 0.000 description 3
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 2
- 229920006026 co-polymeric resin Polymers 0.000 description 2
- 229910001882 dioxygen Inorganic materials 0.000 description 2
- 239000011262 electrochemically active material Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- -1 ethylene tetrafluoride-ethylene hexafluoropropylene Chemical group 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- HCDGVLDPFQMKDK-UHFFFAOYSA-N hexafluoropropylene Chemical group FC(F)=C(F)C(F)(F)F HCDGVLDPFQMKDK-UHFFFAOYSA-N 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 239000012071 phase Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000007790 solid phase Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
Landscapes
- Battery Electrode And Active Subsutance (AREA)
Abstract
전지의 제조방법을 개시한다. 이 제조방법은 활물질층을 가진 음전극의 표면에 표면처리재를 코팅하는 표편처리재 코팅 공정을 포함하여 된 전지의 제조방법에 관한 것으로, 상기 표면 처리재 코팅 공정이 활물질층을 가진 음전극을 휘발성 용매속에 침적시키는 단계와, 상기 침적이 완료된 휘발성 용매를 반 건조시키는 단계와, 상기 분산재에 분산된 표면저리재의 용액에 음전극을 침적시키는 단계와, 상기 침적이 완료된 음전극을 건조시키는 단계를 포함하여 된 것에 그 특징이 있으며, 이는 표면처리재가 음전극의 내부로 침투되는 것을 방지할 수 있는 이점을 가진다.Disclosed is a method for manufacturing a battery. The manufacturing method relates to a method for manufacturing a battery comprising a surface treatment material coating step of coating a surface treatment material on the surface of the negative electrode having an active material layer, the surface treatment material coating process is a negative electrode having an active material layer volatile solvent And depositing a negative electrode in a solution of the surface preparation material dispersed in the dispersion material, and drying the negative electrode in which the deposition was completed. Its characteristics are that it has the advantage of preventing the surface treatment material from penetrating into the interior of the negative electrode.
Description
본 발명은 전지의 제조방법에 관한 것으로, 더 상세하게는 음극의 표면에 표면 처리제를 코팅하기 위한 코팅 방법에 관한 것이다.The present invention relates to a battery manufacturing method, and more particularly to a coating method for coating a surface treatment agent on the surface of the negative electrode.
최근에 들어 휴대용 전자기기의 급격한 수요 증가 및 이들의 소형화, 경량화, 소성능화 추세에 따라 고용량, 고에너지 밀도의 전지가 요구되고 있다.Recently, in accordance with the rapid increase in demand for portable electronic devices and the trend of miniaturization, light weight, and plasticization capability thereof, batteries of high capacity and high energy density are required.
이러한 전지는 케이스의 내부에 전극 조립체가 내부에 장착되어 구성된 것으로, 이 전극조립체는 분리용 재료층(절연층)이 삽입된 반대 극성의 두 분리된 전극으로 이루어진다. 음전극은 압착 또는 접착방식으로 설계될 수 있는데, 이는 전기 화학적 활성 재료로 된 수성 혼합물 및 결합제가 도전성 다공성 기판의 각 면에 접착되어 이루어진다. 이와는 달리 상기 음전극과 양전극은 모두 소결방식으로 설계될 수도 있다. 예를 들면 2-3mm 의 두께의 다공성기판은 다공성 전극플레이트를 형성할 수 있도록 카르 보닐 니켈 분말층으로 소결될 수 있으며, 상기 전극플레이트는 통상적으로 전기 화학적 활성재료에 함침된다.Such a battery is constructed by mounting an electrode assembly inside the case, and the electrode assembly is composed of two separate electrodes of opposite polarities in which a separating material layer (insulating layer) is inserted. The negative electrode can be designed by compression or adhesion, which is achieved by bonding an aqueous mixture and binder of an electrochemically active material to each side of the conductive porous substrate. Alternatively, both the negative electrode and the positive electrode may be designed by a sintering method. For example, a porous substrate having a thickness of 2-3 mm may be sintered with a carbonyl nickel powder layer to form a porous electrode plate, and the electrode plate is usually impregnated with an electrochemically active material.
상술한 바와 같이 제조된 전극 조립체는 케이스의 내부에 장착되어 밀폐되므로 양극에서 발생된 산소가스를 음극에서 효과적으로 흡수하여 전극조립체가 장착된 케이스의 내부 즉, 전지의 내부의 압력이 소정의 압력 범위를 벗어나지 않도록 해야 한다.Since the electrode assembly manufactured as described above is mounted inside the case and sealed, the oxygen gas generated from the anode is effectively absorbed from the cathode, so that the pressure inside the case where the electrode assembly is mounted, that is, the inside of the battery has a predetermined pressure range. Do not let go.
이를 위해서는 음전극의 표면은 고상인 활물질의 접촉면이 증가되어야 한다. 그러나 음전극의 표면은 전해액으로 젖어 기체와의 접촉이 어렵게 되어 있다. 따라서 음전극의 표면에 사불화 에틸렌-육불화프로필렌 공중합 수지미립자 또는 N-10X 등의 표면 처리제를 코팅함으로써 기체와 접촉될 수 있는 계면을 확보 소수성을 부여하며 기상, 액상, 고상의 3 상이 적절하게 접촉할 수 있도록 하고 있다.For this purpose, the contact surface of the active material is a solid surface of the negative electrode should be increased. However, the surface of the negative electrode is wetted with electrolyte, making contact with gas difficult. Therefore, by coating a surface treatment agent such as ethylene tetrafluoride-ethylene hexafluoropropylene copolymer resin or N-10X on the surface of the negative electrode, it secures an interface that can be in contact with the gas, and gives hydrophobicity, and the gas phase, liquid phase, and solid phase are in proper contact with each other. I can do it.
상술한 바와 같이 음 전극의 표면에 상술한 표면처리제를 코팅하기 위한 종래의 방법은 스프레이 방법과, 표면처리재를 분산액에 분산시킨 후 전극을 침적시켜 도포하는 침적법이 사용되고 있다.As mentioned above, the conventional method for coating the above-mentioned surface treatment agent on the surface of the negative electrode has been used by the spray method and the deposition method in which the electrode is deposited by applying the dispersion after the surface treatment material is dispersed in a dispersion.
상기 스프레이법은 음전극의 표면에 표면처리재를 직접 분사하는 방법으로 띠상으로 이루어진 음전극의 표면에 분사하는 것이 용이하지 않고, 작업성이 좋지 않으므로 적용이 어렵다. 그러나 작업성만 해결되면 표면처리재를 음전극의 표면에만 스프레이 할 수 있으므로 일부 업체에서는 사용하고 있다.The spray method is a method of directly spraying the surface treatment material on the surface of the negative electrode is not easy to spray on the surface of the strip-shaped negative electrode, it is difficult to apply because of poor workability. However, some companies use it because the surface treatment material can be sprayed only on the surface of the negative electrode if workability is solved.
그리고 상기 침적법은 상기 표면 처리재를 분산액에 분산시킨 후 표면 처리재가 순산된 액체에 음전극을 담그어 코팅하는 것이다. 그러나 이 방법은 상기 분산재에 의해 음극의 표면이 물러지고, 도 1에 도시된 바와 같이 표면 처리재(100)가 음전극(10)의 내부까지 침투되는 문제점을 가지고 있다. 특히 음전극의 내부까지 표면 처리재가 침투하는 것은 음전극의 용량을 저하시키게 된다.The immersion method is to disperse the surface treatment material in a dispersion and to coat a negative electrode in a liquid in which the surface treatment material is acidic. However, this method has a problem that the surface of the negative electrode is backed off by the dispersant, and the surface treatment material 100 penetrates to the inside of the negative electrode 10 as shown in FIG. 1. In particular, penetration of the surface treatment material into the inside of the negative electrode lowers the capacity of the negative electrode.
본 발명은 상기 문제점을 해결하기 위하여 창출된 것으로, 표면처리재의 코팅에 따른 작업성을 향상시킬 수 있으며, 우수한 코팅막을 얻을 수 있는 전지의 제조방법을 제공함에 그 목적이 있다.The present invention has been made to solve the above problems, it is possible to improve the workability according to the coating of the surface treatment material, and an object of the present invention to provide a method for manufacturing a battery that can obtain an excellent coating film.
도 1은 종래 음전극의 표면처리재가 침적된 상태를 도시한 도면,1 is a view showing a state in which a surface treatment material of the conventional negative electrode is deposited;
도 2의 (a) 내지 (d)는 본 발명에 따른 전지의 제조방법을 개략적으로 나타내 보인 도면.Figure 2 (a) to (d) is a view schematically showing a method for manufacturing a battery according to the present invention.
도면의 주요 부분에 대한 부호의 설명Explanation of symbols for the main parts of the drawings
20;음전극 30; 휘발성 용매20; negative electrode 30; Volatile solvent
40; 분산재40; Dispersant
상기 목적을 달성하기 위하여 본 발명은, 활물질층을 가진 음전극의 표면에 표면처리재를 코팅하는 표편처리재 코팅 공정을 포함하여 된 전지의 제조방법에 있어서, 상기 표면 처리재 코팅 공정이 활물질층을 가진 음전극을 휘발성 용매속에 침적시키는 단계와, 상기 침적이 완료된 휘발성 용매를 건조시키는 단계와, 상기 분산재에 분산된 표면저리재의 용액에 음전극을 침적시키는 단계와, 상기 침적이 완료된 음전극을 건조시키는 단계를 포함하여 된 것을 그 특징으로 한다.In order to achieve the above object, the present invention includes a surface treatment material coating step of coating a surface treatment material on the surface of the negative electrode having an active material layer, the surface treatment material coating step is a method for producing an active material layer Immersing the negative electrode in a volatile solvent, drying the volatile solvent in which the deposition is completed, depositing the negative electrode in a solution of the surface preparation material dispersed in the dispersion, and drying the negative electrode in which the deposition is completed. It is characterized by what was included.
이하 첨부된 도면을 참조하여 본 발명에 따른 한 바람직한 실시예를 상세하게 설명하면 다음과 같다.Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.
본 발명에 따른 전지는 케이스가 마련되고, 이 케이스의 내부에 전극 조립체(bare sell)가 설치되는데, 이 전극 조립체는 양전극과 음전극이 각각 소정의 각각 소정의 폭과 길이를 가지는 띠상으로 제조되고, 이들의 사이에는 절연부재가 개재된 상태에서 나선형으로 감겨진다.In the battery according to the present invention, a case is provided, and an electrode assembly is provided inside the case, and the electrode assembly is manufactured in a band shape in which the positive electrode and the negative electrode each have a predetermined width and length, respectively. Between them, it is wound spirally in the state which the insulating member interposed.
상기와 같이 케이스에 장착된 전극조립체중 음극은 양극에서 발생된 산소가스를 흡수할 수 있도록함으로써 케이스 내부의 압력이 설정된 범위를 벗어나지 않도록 하여야 하는데, 이를 위해서 활물질층이 형성된 음전극의 표면에 사불화 에틸렌-육불화프로필렌 공중합 수지미립자 또는 N-10X 등의 표면처리재가 도포된다.As described above, the negative electrode of the electrode assembly mounted on the case may absorb oxygen gas generated from the positive electrode so that the pressure inside the case does not deviate from the set range. -Surface treatment materials such as hexafluoropropylene copolymer resin fine particles or N-10X are applied.
이 표면 처리제의 도포는 전지의 제조공정에 있어서, 먼저 활물질층이 형성된 음전극(20)을 휘발성 용매속(30)에 침적(도 2의 (a)) 시킨 후, 상기 휘발송 용매(30)가 침적된 음전극(20)을 반 건조(도 2의 (b))시킨다. 이때에 상기 음전극의 건조는 자연건조함이 바람직하고, 상기 휘발성 용매는 알콜을 사용함이 바람직하다.The coating of the surface treating agent is performed by first depositing the negative electrode 20 having the active material layer in the volatile solvent 30 (FIG. 2A) in the battery manufacturing process. The deposited negative electrode 20 is dried half (FIG. 2B). At this time, the drying of the negative electrode is preferably natural drying, and the volatile solvent is preferably used alcohol.
상기와 같은 상태에서 도 2의 (c)에 도시된 바와 같이 상기 음전극(20)을 상기 표면처리재가 분산된 분산제(40)에 침전시킨다. 이와 같이 하면 초기 침적액인 휘발성 용매에 의한 분리 현상으로 연화된 음전극의 내부로 표면 처리재가 침투하지 못하게 된다. 상기 표면처리재의 침적이 완료되면 이를 도 2의 (d))에 도시된 바와 같이 건조시켜 표면처리재의 코팅을 완료한다.In the above state, as shown in FIG. 2C, the negative electrode 20 is precipitated in the dispersant 40 in which the surface treatment material is dispersed. This prevents the surface treatment material from penetrating into the negative electrode softened by the separation phenomenon by the volatile solvent which is the initial deposition liquid. When the deposition of the surface treatment material is completed, it is dried as shown in (d) of FIG. 2 to complete the coating of the surface treatment material.
상술한 바와 같이 음전극의 표면에 표면 처리재를 코팅하는 것은 표면처리재가 음전극의 내부로 침투되는 것을 방지할 수 있어 표면처리재에 의한 활물질의 정전용량이 저하되는 것을 방지할 수 있다. 또한 대량생산에 적용이 가능하며 생산성의 향상을 도모할 수 있다.Coating the surface treatment material on the surface of the negative electrode as described above can prevent the surface treatment material from penetrating into the negative electrode, thereby preventing the capacitance of the active material by the surface treatment material from being lowered. In addition, it can be applied to mass production and productivity can be improved.
Claims (3)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019960051433A KR19980031869A (en) | 1996-10-31 | 1996-10-31 | Battery manufacturing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019960051433A KR19980031869A (en) | 1996-10-31 | 1996-10-31 | Battery manufacturing method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| KR19980031869A true KR19980031869A (en) | 1998-07-25 |
Family
ID=66519644
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR1019960051433A Withdrawn KR19980031869A (en) | 1996-10-31 | 1996-10-31 | Battery manufacturing method |
Country Status (1)
| Country | Link |
|---|---|
| KR (1) | KR19980031869A (en) |
-
1996
- 1996-10-31 KR KR1019960051433A patent/KR19980031869A/en not_active Withdrawn
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