KR20040001781A - Nickel metal hydride negative electrode manufacturing process of electric vehicle - Google Patents
Nickel metal hydride negative electrode manufacturing process of electric vehicle Download PDFInfo
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- KR20040001781A KR20040001781A KR1020020037103A KR20020037103A KR20040001781A KR 20040001781 A KR20040001781 A KR 20040001781A KR 1020020037103 A KR1020020037103 A KR 1020020037103A KR 20020037103 A KR20020037103 A KR 20020037103A KR 20040001781 A KR20040001781 A KR 20040001781A
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- South Korea
- Prior art keywords
- electrode plate
- slurry
- nickel metal
- metal hydride
- negative electrode
- Prior art date
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- PXHVJJICTQNCMI-UHFFFAOYSA-N nickel Substances [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 title claims abstract description 27
- 229910052759 nickel Inorganic materials 0.000 title claims abstract description 25
- 229910052987 metal hydride Inorganic materials 0.000 title claims description 24
- -1 Nickel metal hydride Chemical class 0.000 title claims description 23
- 238000004519 manufacturing process Methods 0.000 title claims description 20
- 238000000034 method Methods 0.000 claims abstract description 27
- 239000002002 slurry Substances 0.000 claims abstract description 27
- 238000001035 drying Methods 0.000 claims abstract description 16
- 238000005096 rolling process Methods 0.000 claims abstract description 16
- 239000000843 powder Substances 0.000 claims abstract description 9
- 239000000956 alloy Substances 0.000 claims abstract description 6
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 6
- 238000002156 mixing Methods 0.000 claims abstract description 6
- 239000011268 mixed slurry Substances 0.000 claims abstract description 4
- 239000011149 active material Substances 0.000 claims description 6
- 238000007606 doctor blade method Methods 0.000 claims description 3
- 229910052739 hydrogen Inorganic materials 0.000 abstract description 3
- 239000001257 hydrogen Substances 0.000 abstract description 3
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 abstract description 2
- 239000002184 metal Substances 0.000 abstract description 2
- 229910052751 metal Inorganic materials 0.000 abstract description 2
- 229910018095 Ni-MH Inorganic materials 0.000 abstract 2
- 229910018477 Ni—MH Inorganic materials 0.000 abstract 2
- 239000011248 coating agent Substances 0.000 abstract 1
- 238000000576 coating method Methods 0.000 abstract 1
- 238000005245 sintering Methods 0.000 description 4
- 238000005259 measurement Methods 0.000 description 3
- 239000007773 negative electrode material Substances 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 238000004220 aggregation Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000009770 conventional sintering Methods 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000007772 electrode material Substances 0.000 description 1
- 150000002431 hydrogen Chemical class 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000004886 process control Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L50/00—Electric propulsion with power supplied within the vehicle
- B60L50/50—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells
- B60L50/60—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells using power supplied by batteries
- B60L50/66—Arrangements of batteries
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2220/00—Batteries for particular applications
- H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane
-
- 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
Abstract
Description
본 발명은 전기 차량용 니켈 금속수소 전지에 관한 것으로서, 특히 전기 차량용 니켈 금속수소 전지의 음극 제조공정에 관한 것이다.The present invention relates to a nickel metal hydride battery for an electric vehicle, and more particularly, to a negative electrode manufacturing process of a nickel metal hydride battery for an electric vehicle.
통상적으로, 기존 소결 방식의 니켈 금속수소(Ni-MH ; Nickel Metal Hydride) 전지의 음극은 도 1에 도시된 바와 같이 수소 흡장 합금의 분말을 니켈 매시(Ni-Mesh)로 되어있는 집전체 위에 도포한 후 압연하여 균일한 두께의 띠 형태로 제조한다.Typically, a negative electrode of a conventional sintering nickel-metal hydride (Ni-MH) battery is coated with a powder of a hydrogen storage alloy on a current collector made of nickel mash as shown in FIG. 1. After rolling, it is manufactured in the form of a strip of uniform thickness.
그 후 소결로(110)를 통과시켜 활물질을 소결하는 공정을 거쳐 극판(120)을 제조하는 방식을 사용한다.Thereafter, a method of manufacturing the electrode plate 120 through a process of sintering the active material by passing through the sintering furnace 110 is used.
대형 니켈 금속수소(Ni-MH) 전지에 적용할 수 있는 페이스팅 방식의 음극판 제조 공정 변수로서 기존의 페이스트 타입의 소형 전지를 제조하는 공정상의 제어변수를 적용한다면, 활물질 슬러리의 조성상의 불균일과 극판 두께의 균일화에 악영향을 미치는 활물질의 뭉침 현상이 발생할 수 있다.Applying process control variables for manufacturing small paste-type batteries as a process variable for pasting-type negative electrode plate manufacturing process that can be applied to large nickel metal hydride (Ni-MH) batteries, non-uniformity and composition of active material slurry Aggregation of the active material may adversely affect the uniformity of the thickness.
또한, 기존의 대형 니켈 금속수소(Ni-MH) 전지에서 사용하는 방식에 의한 음극판 제조는 압연 후 소결 공정을 통과하기 때문에 이미 치밀한 밀도를 갖는 합금분말 자체가 다시 한번 소결(Sintering)된다.In addition, since the negative electrode plate manufactured by the method used in the existing large-size nickel metal hydride (Ni-MH) battery passes the sintering process after rolling, the alloy powder itself having a dense density is sintered once again.
이 때문에 극판의 밀도는 더욱 치밀해진다.For this reason, the density of the electrode plate becomes more dense.
전지로 제작된 후에는 최초 전지로서 극성을 가지게 하는 화성공정 (Formation)을 거치게 된다.After the battery is manufactured, it is subjected to a formation process that has polarity as the first battery.
이때 충방전 과정에서 음극 활물질은 표면에서의 화학반응 때문에 부피 팽창을 하게되는데 매우 치밀한 극판 내부에서는 팽창에 대한 여유 공간이 없으므로 약 6~7% 정도 길이 방향으로 극판이 늘어나게 된다.At this time, during charging and discharging process, the negative electrode active material expands in volume due to chemical reaction on the surface. Since there is no free space for expansion in the very dense electrode plate, the electrode plate increases in the longitudinal direction by about 6 to 7%.
이 순간 집전체인 니켈 매시(Ni-Mesh)(210)도 같이 팽창하게 되는데, 이 때문에 전극과 극판이 연결된 탭(220)부위가 도 2에 도시된 바와 같이 파괴되는 현상이 발생하기도 한다.At this moment, the nickel-mesh 210, which is the current collector, also expands, and thus, a portion of the tab 220 connected to the electrode and the electrode plate may be destroyed as shown in FIG. 2.
이러한 현상이 발생하면, 전지의 내부저항은 급격히 증가하고, 심지어 단락이 일어나기도 한다.When this happens, the internal resistance of the battery increases rapidly and even a short circuit occurs.
본 발명의 목적은 전기 차량용 니켈 금속수소(Ni-MH) 전지에서 사용되는 음극판 제조공정을 개선하여 전지 출력의 향상과 품질의 안정화를 도모할 수 있는 전기 차량용 니켈 금속수소 전지의 음극 제조공정을 제공하는데 있다.SUMMARY OF THE INVENTION An object of the present invention is to improve a negative electrode plate manufacturing process used in nickel metal hydride (Ni-MH) batteries for electric vehicles, thereby providing a negative electrode manufacturing process for nickel metal hydride batteries for electric vehicles that can improve battery output and stabilize quality. It is.
도 1은 종래 기술에 따른 전기 차량용 니켈 금속수소 전지의 음극 제조공정을 도시한 도면.1 is a view showing a negative electrode manufacturing process of a nickel metal hydride battery for an electric vehicle according to the prior art.
도 2는 종래 기술에 따른 전기 차량용 니켈 금속수소 전지의 음극 제조공정시 발생하는 집전체 파손상태를 도시한 도면.Figure 2 is a view showing a current collector damage state occurring during the negative electrode manufacturing process of a nickel metal hydride battery for an electric vehicle according to the prior art.
도 3은 본 발명의 실시예에 따른 전기 차량용 니켈 금속수소 전지의 음극 제조공정을 도시한 도면.3 is a view showing a negative electrode manufacturing process of a nickel metal hydride battery for an electric vehicle according to an embodiment of the present invention.
상기와 같은 목적을 달성하기 위하여 본 발명은 전기 차량용 니켈 금속수소(Ni-MH) 전지의 음극 제조공정에 있어서, 상기 니켈 금속수소 전지의 음극 합금 분말을 135,000~155,000 cps의 슬러리 점도를 갖는 슬러리 형태로 만드는 슬러리 혼합 공정과; 상기 혼합된 슬러리를 집전체 위에 도포하여 설정된 페이스팅 속도로 롤링하는 극판 페이스팅 공정과; 상기 슬러리 형태로 페이스팅된 극판을 설정 건조온도로 건조하는 극판 건조 공정과; 상기 건조된 극판을 설정 두께를 유지하도록 압연하는 극판 압연 공정을 포함하여 이루어지는 것을 특징으로 한다.In order to achieve the above object, the present invention provides a negative electrode powder of the nickel metal hydride (Ni-MH) battery for the electric vehicle, the slurry of the negative electrode powder of the nickel metal hydride battery having a slurry viscosity of 135,000 ~ 155,000 cps Slurry mixing step of making; An electrode plate pasting step of applying the mixed slurry onto a current collector to roll at a set pasting rate; A pole plate drying process of drying the plated electrode plate in a slurry form at a predetermined drying temperature; And a pole plate rolling step of rolling the dried electrode plate to maintain a set thickness.
이하 본 발명의 바람직한 실시예를 첨부한 도면을 참조하여 상세히 설명한다. 하기 설명 및 첨부 도면과 같은 많은 특정 상세들이 본 발명의 보다 전반적인 이해를 제공하기 위해 나타나 있으나, 이들 특정 상세들은 본 발명의 설명을 위해 예시한 것으로 본 발명이 그들에 한정됨을 의미하는 것은 아니다. 그리고 본 발명의 요지를 불필요하게 흐릴 수 있는 공지 기능 및 구성에 대한 상세한 설명은 생략한다.Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. While many specific details, such as the following description and the annexed drawings, are shown to provide a more general understanding of the invention, these specific details are illustrated for the purpose of explanation of the invention and are not meant to limit the invention thereto. And a detailed description of known functions and configurations that may unnecessarily obscure the subject matter of the present invention will be omitted.
도 3을 참조하여 본 발명의 실시예에 따른 전기 차량용 니켈 금속수소 전지의 음극 제조공정을 설명한다.A negative electrode manufacturing process of a nickel metal hydride battery for an electric vehicle according to an exemplary embodiment of the present invention will be described with reference to FIG. 3.
본 발명의 실시예는 전기 차량용 니켈 금속수소(Ni-MH) 전지의 음극 제조공정에 있어서, 슬러리 혼합 공정(① 공정), 극판 페이스팅 공정(② 공정), 극판 건조 공정(③ 공정), 극판 압연 공정(④ 공정)을 포함하여 이루어진다.Embodiment of the present invention, in the negative electrode manufacturing process of nickel metal hydride (Ni-MH) battery for electric vehicles, slurry mixing process (① process), pole plate pasting process (② process), pole plate drying process (③ process), pole plate Rolling process (4).
먼저, 슬러리 혼합 공정은 니켈 금속수소 전지의 음극 합금 분말을 135,000~155,000 cps의 슬러리 점도를 갖는 슬러리 형태로 만드는 공정이다.First, the slurry mixing process is a process of making the negative electrode powder of the nickel metal hydride battery into a slurry having a slurry viscosity of 135,000 to 155,000 cps.
슬러리 점도의 단위는 cp(Centi Poise) 이고 s는 복수의 의미로 붙인다.The unit of slurry viscosity is cp (Centi Poise) and s is attached in multiple meanings.
그리고, 슬러리 혼합 공정에서의 측정 조건은 다음과 같다.And the measurement conditions in a slurry mixing process are as follows.
스핀들 ; 4, rpm ; 2, sec ; 30, 측정용기 ; 15cc 실린더Spindle; 4, rpm; 2, sec; 30, measuring vessel; 15cc cylinder
여기서, 측정 조건은 점도 측정기의 사양을 말하며, "4"는 회전하는 스핀들의 크기, "rpm"은 회전속도, "측정용기 : 15cc 실린더"는 측정하는 슬러리의 양을 나타낸다.Here, the measurement conditions refer to the specification of the viscosity meter, "4" is the size of the rotating spindle, "rpm" is the rotational speed, "measurement container: 15cc cylinder" represents the amount of the slurry to be measured.
점도가 135,000~155,000 cps 정도이면 상당히 높은 점도로 일반적으로 공지진 타르(tar)의 점도에 해당된다.A viscosity of about 135,000 to 155,000 cps is a fairly high viscosity, generally corresponding to the viscosity of known tar.
극판 페이스팅 공정은 혼합된 슬러리를 집전체 위에 도포하여 설정된 페이스팅 속도로 롤링하는 공정이다.The electrode plate pasting process is a process of applying a mixed slurry on a current collector to roll at a set pasting speed.
극판 페이스팅 공정에서 설정된 페이스팅 속도는 극판을 롤 형태로 말았다가 슬러리를 통과시킬 때 롤이 회전하는 속도를 800rpm으로 하고, 극판이 슬러리가 담겨있는 통속을 6~9 cm/min의 속도로 통과하도록 한다.The pasting speed set in the electrode plate pasting process is 800 rpm for the roll to rotate when the electrode plate is rolled and passed through the slurry, and the electrode plate passes through the barrel containing the slurry at a speed of 6 to 9 cm / min. Do it.
극판 건조 공정은 슬러리 형태로 페이스팅된 극판을 설정 건조온도로 건조하는 공정이다.The electrode plate drying process is a process of drying a plated electrode plate in a slurry form at a predetermined drying temperature.
극판 건조 공정에서 설정 건조온도는 55℃~65℃로 설정한다.In the electrode plate drying process, the set drying temperature is set at 55 ° C to 65 ° C.
극판 압연 공정은 건조된 극판을 설정 두께를 유지하도록 압연하는 공정이다.The electrode plate rolling process is a process of rolling a dried electrode plate to maintain a predetermined thickness.
극판 압연 공정은 극판의 두께를 일정하게 하기 위한 닥터 블레이드 공법의 블레이드(Blade) 폭을 1.0~1.5mm로 하고, 극판에 활물질이 도포되고 닥터 블레이드로 일정하게 두께를 유지한 뒤 압연하는 롤러의 간격을 0.3~0.6 mm로 하여 롤링한 후 건조된 극판의 두께를 0.7~0.8mm로 유지한다.In the pole plate rolling process, the blade width of the doctor blade method for maintaining the thickness of the pole plate is 1.0 to 1.5 mm, the active material is applied to the pole plate, and the thickness of the roller is rolled after maintaining a constant thickness with the doctor blade. After rolling to 0.3 ~ 0.6 mm, keep the thickness of the dried electrode plate at 0.7 ~ 0.8mm.
여기서, 블레이드 폭은 극판의 두께를 일정하게 하기 위한 닥터 블레이드 공법의 블레이드의 간격을 나타낸다.Here, blade width represents the space | interval of the blade of the doctor blade method for making thickness of a pole plate constant.
또한, 압연 롤러 간격은 극판에 활물질이 도포되고 닥터 블레이드로 일정하게 두께를 유지한 뒤 압연하는 롤러의 폭을 나타낸다.In addition, the rolling roller spacing represents the width of the roller which is rolled after the active material is applied to the electrode plate and the thickness is kept constant by the doctor blade.
상기한 바와 같이 본 발명의 실시예는 음극 합금 분말을 슬러리 형태로 만들고, 그 슬러리를 집전체 위에 도포하여 롤링하는 공정으로 소결 극판에 비해 엉성해진 내부의 여유공간이 음극판의 팽창시 댐핑(Damping)역할을 하게 하여 집전체의 파손을 방지하고, 음극 활물질 슬러리가 극판에 도포될 때 엉김 현상이나 불균일 한 형태를 띠지 않게 한다.As described above, the embodiment of the present invention is a process of making the anode alloy powder in the form of a slurry, and applying the slurry onto a current collector to roll the damping during expansion of the cathode plate having a larger clearance than the sintered electrode plate. It serves to prevent breakage of the current collector, and does not have a tangling phenomenon or uneven shape when the negative electrode active material slurry is applied to the electrode plate.
본 발명의 실시예는 금속 수소(MH) 합금 분말을 사용하여 전기 차량용 대형 니켈 금속 수소(Ni-MH) 전지용 음극판을 제조함에 있어서 전지 출력과 품질의 안정화 측면이 고려된 제조라인의 공정 변수들을 한정한 것이다.An embodiment of the present invention defines the process parameters of a manufacturing line considering the stabilization of battery output and quality in manufacturing a negative electrode plate for a large nickel metal hydride (Ni-MH) battery for an electric vehicle using a metal hydrogen (MH) alloy powder. It is.
상술한 바와 같이 본 발명에 따른 전기 차량용 니켈 금속수소 전지의 음극 제조공정은 극판 활물질의 탈락이 거의 없고 극판 성장에 의한 집전체의 끊김 현상이 전혀 일어나지 않는다.As described above, in the negative electrode manufacturing process of the nickel metal hydride battery for an electric vehicle according to the present invention, there is almost no dropout of the electrode active material and no breakage of the current collector due to growth of the electrode plate occurs.
또한, 소결 공정을 생략할 수 있으며, 장비 및 시설의 축소가 가능한 효과가 있다.In addition, the sintering process can be omitted, it is possible to reduce the equipment and facilities.
Claims (4)
Priority Applications (1)
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| KR1020020037103A KR20040001781A (en) | 2002-06-28 | 2002-06-28 | Nickel metal hydride negative electrode manufacturing process of electric vehicle |
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| KR1020020037103A KR20040001781A (en) | 2002-06-28 | 2002-06-28 | Nickel metal hydride negative electrode manufacturing process of electric vehicle |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55136465A (en) * | 1979-04-10 | 1980-10-24 | Japan Storage Battery Co Ltd | Manufacturing method of negative electrode plate for alkaline storage battery |
| JPS55139763A (en) * | 1979-04-17 | 1980-10-31 | Japan Storage Battery Co Ltd | Process for producing negative plate for alkaline battery |
| KR19980022830A (en) * | 1996-09-24 | 1998-07-06 | 손욱 | Anode plate for nickel hydride battery and its manufacturing method |
| KR100189808B1 (en) * | 1996-06-10 | 1999-06-01 | 손욱 | Wound electrode plate |
| KR20020001416A (en) * | 2000-06-28 | 2002-01-09 | 한승우 | Method for manufacturing electrode of lithium polymer battery and lithium polymer battery using the electrode made by the method |
| KR100326465B1 (en) * | 1999-12-08 | 2002-02-28 | 김순택 | Negative active material slurry composition for lithium secondary battery and method of preparing negative electrode by using same |
-
2002
- 2002-06-28 KR KR1020020037103A patent/KR20040001781A/en not_active Application Discontinuation
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55136465A (en) * | 1979-04-10 | 1980-10-24 | Japan Storage Battery Co Ltd | Manufacturing method of negative electrode plate for alkaline storage battery |
| JPS55139763A (en) * | 1979-04-17 | 1980-10-31 | Japan Storage Battery Co Ltd | Process for producing negative plate for alkaline battery |
| KR100189808B1 (en) * | 1996-06-10 | 1999-06-01 | 손욱 | Wound electrode plate |
| KR19980022830A (en) * | 1996-09-24 | 1998-07-06 | 손욱 | Anode plate for nickel hydride battery and its manufacturing method |
| KR100326465B1 (en) * | 1999-12-08 | 2002-02-28 | 김순택 | Negative active material slurry composition for lithium secondary battery and method of preparing negative electrode by using same |
| KR20020001416A (en) * | 2000-06-28 | 2002-01-09 | 한승우 | Method for manufacturing electrode of lithium polymer battery and lithium polymer battery using the electrode made by the method |
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