KR100528900B1 - Secondary battery and method for making the same - Google Patents
Secondary battery and method for making the same Download PDFInfo
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- KR100528900B1 KR100528900B1 KR10-1999-0010729A KR19990010729A KR100528900B1 KR 100528900 B1 KR100528900 B1 KR 100528900B1 KR 19990010729 A KR19990010729 A KR 19990010729A KR 100528900 B1 KR100528900 B1 KR 100528900B1
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- electrode
- electrode roll
- roll
- secondary battery
- case
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- 238000000034 method Methods 0.000 title claims description 8
- 238000004519 manufacturing process Methods 0.000 claims abstract description 20
- 238000007789 sealing Methods 0.000 claims abstract description 12
- 239000003792 electrolyte Substances 0.000 claims abstract description 9
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 7
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 7
- 239000008151 electrolyte solution Substances 0.000 claims description 6
- 238000004804 winding Methods 0.000 claims description 4
- 239000011149 active material Substances 0.000 abstract description 5
- 230000006866 deterioration Effects 0.000 abstract description 4
- 238000004880 explosion Methods 0.000 abstract description 3
- 238000007599 discharging Methods 0.000 description 4
- 238000002347 injection Methods 0.000 description 3
- 239000007924 injection Substances 0.000 description 3
- 229910001416 lithium ion Inorganic materials 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 230000008602 contraction Effects 0.000 description 2
- -1 polypropylene Polymers 0.000 description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- 229910018095 Ni-MH Inorganic materials 0.000 description 1
- 229910018477 Ni—MH Inorganic materials 0.000 description 1
- 239000002033 PVDF binder Substances 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 239000004809 Teflon Substances 0.000 description 1
- 229920006362 Teflon® Polymers 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000010294 electrolyte impregnation Methods 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000011244 liquid electrolyte Substances 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 229910021450 lithium metal oxide Inorganic materials 0.000 description 1
- 229910003002 lithium salt Inorganic materials 0.000 description 1
- 159000000002 lithium salts Chemical class 0.000 description 1
- 239000007773 negative electrode material Substances 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 229920002981 polyvinylidene fluoride Polymers 0.000 description 1
- 239000007774 positive electrode material Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
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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
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/531—Electrode connections inside a battery casing
- H01M50/538—Connection of several leads or tabs of wound or folded electrode stacks
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/04—Construction or manufacture in general
- H01M10/0431—Cells with wound or folded electrodes
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/04—Construction or manufacture in general
- H01M10/0468—Compression means for stacks of electrodes and separators
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/058—Construction or manufacture
- H01M10/0587—Construction or manufacture of accumulators having only wound construction elements, i.e. wound positive electrodes, wound negative electrodes and wound separators
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/116—Primary casings; Jackets or wrappings characterised by the material
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/30—Arrangements for facilitating escape of gases
- H01M50/342—Non-re-sealable arrangements
- H01M50/3425—Non-re-sealable arrangements in the form of rupturable membranes or weakened parts, e.g. pierced with the aid of a sharp member
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/543—Terminals
-
- 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
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Secondary Cells (AREA)
Abstract
목적 : 구성 부품의 수를 줄이고 제조 공정을 단축 및 용이하게 실현할 수 있도록 한 이차전지 및 그 제조방법을 제공함에 목적을 두고 있다.OBJECTIVE: To provide a secondary battery and a method of manufacturing the same to reduce the number of components and to shorten and facilitate the manufacturing process.
구성 : 정극과 부극 및 세퍼레이터를 함께 권취하여 전극 롤(2)을 형성하고, 그 전극 롤을 전해액에 함침한 후 외부에서 끼워지는 홀딩부재(22)로 고정하고, 이렇게 고정한 전극 롤을 일면 개방된 케이스(40)의 내부로 수납하되, 상기 케이스의 일측으로 전극 롤의 정극 및 부극에서 인출된 탭(2a)(2b)이 노출되게 한 상태에서 뚜껑(42)을 닫고 그 테두리를 이중 히트 실링한 구성으로 이루어진다.Composition: The positive electrode, the negative electrode, and the separator are wound together to form an electrode roll 2, the electrode roll is impregnated with electrolyte, and then fixed with a holding member 22 fitted outside, and the electrode roll thus fixed is opened on one side. The inside of the case 40 is accommodated, but the lid 42 is closed and the edges are double heat-sealed while the tabs 2a and 2b drawn from the positive electrode and the negative electrode of the electrode roll are exposed to one side of the case. Consists of the configuration.
효과 : 전극 롤이 사전에 전해액에 함침되므로 제조 공정을 단축할 수 있고, 이것이 홀딩부재에 의해 고정되므로 활물질의 탈락 및 열화를 방지할 수 있다. 또 케이스를 알미늄 적층판으로 만들고 일면 개방된 상태의 뚜껑을 이중 히트 실링하므로, 그 실링 압력에 의해 전지의 폭발 방지를 위한 안전장치를 구성할 수 있다. 따라서 제조 공정이 단축되고 용이하게 실현되며, 특히 종래의 캡 어셈블리의 구성 부품들이 필요 없게 되므로 부품 수를 감소할 수 있다.Effect: Since the electrode roll is impregnated with the electrolyte in advance, the manufacturing process can be shortened, and since it is fixed by the holding member, dropping and deterioration of the active material can be prevented. In addition, since the case is made of an aluminum laminate and double heat sealing the lid in an open state, the sealing pressure can be configured to prevent the explosion of the battery by the sealing pressure. The manufacturing process is thus shortened and easily realized, in particular the number of components can be reduced since the components of the conventional cap assembly are not needed.
Description
본 발명은 부품 수를 줄이고 제조 공정을 단축 및 용이하게 실현할 수 있도록 하는 이차전지 및 그 제조방법에 관한 것이다.The present invention relates to a secondary battery and a method for manufacturing the same, which can reduce the number of parts, shorten and facilitate the manufacturing process.
이차전지는 재충전이 가능하고 소형 및 대용량화가 가능한 것으로, 대표적으로는 니켈수소(Ni-MH)전지, 리튬(Li)전지 및 리튬이온(Li-ion)전지가 사용되고 있다.Rechargeable batteries can be recharged, miniaturized, and large-capacity. Typically, nickel-hydrogen (Ni-MH) batteries, lithium (Li) batteries, and lithium-ion (Li-ion) batteries are used.
이러한 이차전지는 외관상 원통형과 각형 전지로 구분되어 지는 바, 그 중에서 정극 활물질로 리튬-금속산화물을 사용하고, 부극 활물질로 탄소 혹은 탄소복합체를 사용하며, 유기 용매에 리튬염을 녹인 액체 전해질을 함침한 각형 리튬이온전지의 일반적인 구조가 도 3에 표시되어 있다.These secondary batteries are classified into cylindrical and rectangular batteries in appearance. Among them, lithium-metal oxide is used as the positive electrode active material, carbon or carbon composite material is used as the negative electrode active material, and a liquid electrolyte in which lithium salt is dissolved in an organic solvent is impregnated. The general structure of a rectangular lithium ion battery is shown in FIG. 3.
도면에서와 같이 각형 이차전지는 정극과 부극 및 세퍼레이터를 함께 권취하여 전극 롤(2)을 형성하고, 이것을 압착하여 각형 캔(4)의 내부에 수납하며, 전극 롤(2)과 캔(4)의 사이에 판 스프링(6)을 개재하여 전지의 충·방전시 발생하는 전극 롤의 팽창, 수축을 보상하고, 다시 각형 캔(4)의 상부에 캡 어셈블리(8)를 용접한 후 전해액을 주입하여 밀봉하는 구성으로 이루어진다. 전극 롤(2)의 부극은 관벽 접촉식 혹은 도시하지 않은 탭을 이용하여 캔(4)과 연결되고, 전극 롤(2)의 정극은 탭(2a)을 이용하여 캡 어셈블리(8)에 연결되어진다.As shown in the drawing, the rectangular secondary battery winds up the positive electrode, the negative electrode, and the separator together to form an electrode roll 2, and compresses and stores the electrode roll 2 inside the rectangular can 4, and the electrode roll 2 and the can 4. Compensate for the expansion and contraction of the electrode roll generated during charging and discharging of the battery via the leaf spring 6 between the electrodes, and again welding the cap assembly 8 to the upper portion of the square can 4, and then injecting the electrolyte solution. It is made of a configuration that seals. The negative electrode of the electrode roll 2 is connected to the can 4 using a tube wall contact or a tab (not shown), and the positive electrode of the electrode roll 2 is connected to the cap assembly 8 using the tab 2a. Lose.
캡 어셈블리(8)는 캔(4)의 상부에 용접되는 부극 플레이트(10)와 그 중심에 배치되는 정극 플레이트(12)의 사이에 절연판(14)을 개재하고, 부극 플레이트(10)와 정극 플레이트(12)의 중심을 관통하는 리벳(16)을 이용하여 결합한 것이며, 상기 부극 플레이트에는 안전변(18)이 형성되어서 전지 내부의 비정상적인 압력 상승시 폭발을 방지하고 있다. 또 부극 플레이트(10)에는 전해액 주입구(20)가 형성되어서 전해액의 주입 후 플러그에 의해 밀봉되어진다.The cap assembly 8 is interposed between the negative electrode plate 10 to be welded to the top of the can 4 and the positive electrode plate 12 disposed at the center thereof, and the negative plate 10 and the positive electrode plate are interposed therebetween. The rivet 16 penetrates through the center of 12, and a safety valve 18 is formed on the negative electrode plate to prevent explosion when an abnormal pressure rises inside the battery. In addition, an electrolyte injection hole 20 is formed in the negative electrode plate 10 to be sealed by a plug after injection of the electrolyte solution.
그러나 종래 각형 이차전지의 구성을 보면, 전극 롤(2)의 팽창 방지를 위한 판 스프링(6), 쇼트 방지를 위한 절연판, 안전변(18)과 전해액 주입구(18)를 갖는 캡 어셈블리(8) 등과 같이 부품의 수가 많이 필요하고, 제조 및 조립 공정이 복잡한 문제점이 있다. 특히 각형 이차전지의 제조 공정에서는 전해액 주입시 장시간이 소요되므로 생산성이 떨어지는 문제점이 있다.However, in the structure of the conventional rectangular secondary battery, the plate spring (6) for preventing the expansion of the electrode roll (2), the insulating plate for preventing the short, the cap assembly (8) having the safety valve 18 and the electrolyte inlet (18), etc. Likewise, a large number of parts are required, and manufacturing and assembly processes are complicated. In particular, in the manufacturing process of the square secondary battery, it takes a long time to inject the electrolyte, there is a problem that the productivity is lowered.
또한 각형 캔(4)의 내부로 수납된 전극 롤(2)은 전지의 충·방전시 팽창, 수축이 반복되는 바, 그로 인하여 기재에 도포한 활물질이 탈락되거나 열화되는 문제점이 있다.In addition, since the electrode roll 2 accommodated in the rectangular can 4 is repeatedly expanded and contracted during charging and discharging of the battery, there is a problem in that the active material applied to the substrate is dropped or degraded.
앞서 설명한 종래 기술의 문제점을 해결하기 위한 것으로서, 본 발명은 새로운 개념의 구성과 제조 방법을 도입하여, 구성 부품의 수를 줄이고 제조 공정을 단축 및 용이하게 실현할 수 있도록 한 이차전지 및 그 제조방법을 제공함에 목적을 두고 있다.In order to solve the problems of the prior art described above, the present invention provides a secondary battery and a method of manufacturing the same by introducing a new concept of configuration and manufacturing method, to reduce the number of components and to shorten and facilitate the manufacturing process The purpose is to provide.
이를 위하여 본 발명에서는 정극과 부극 및 세퍼레이터를 함께 권취하여 전극 롤을 형성하고, 그 전극 롤을 전해액에 함침한 후 외부로 끼워지는 홀딩부재를 이용하여 고정하고, 이렇게 고정한 전극 롤을 일면 개방된 케이스에 수납하되, 상기 케이스의 일측으로 전극 롤의 정극 및 부극에서 인출된 탭이 노출되게 한 상태에서 뚜껑을 닫아 테두리를 이중 히트 실링하여 얻어지는 이차전지 및 그 제조방법을 제안한다.To this end, in the present invention, the positive electrode, the negative electrode, and the separator are wound together to form an electrode roll, and the electrode roll is fixed using a holding member fitted to the outside after impregnating the electrode roll, and the electrode roll thus fixed is opened on one side of the case. The present invention proposes a secondary battery and a method of manufacturing the same, which are accommodated in a case, and are obtained by double-sealing a rim by closing a lid in a state in which tabs drawn from the positive electrode and the negative electrode of the electrode roll are exposed to one side of the case.
여기서 전극 롤은 조립 전에 미리 전해액에 함침되므로 제조 공정을 단축할 수 있고, 이것이 홀딩부재에 의해 고정되게 하므로 활물질의 탈락 및 열화를 방지할 수 있다. 또 케이스를 알미늄 적층판으로 만들고 일면 개방된 상태의 뚜껑을 이중 히트 실링하므로, 그 실링 압력에 의해 전지의 폭발 방지를 위한 안전장치를 구현할 수 있다.Since the electrode roll is impregnated with the electrolyte solution before assembly, the manufacturing process can be shortened, and this can be fixed by the holding member, thereby preventing the active material from falling off and deterioration. In addition, since the case is made of an aluminum laminate and double heat-sealed with a lid open on one side, a safety device for preventing explosion of the battery can be realized by the sealing pressure.
따라서 본 발명에 의하면 제조 공정이 단축되고 용이하게 실현되며, 특히 캡 어셈블리의 구성 부품들이 필요 없게 되므로 부품 수를 감소할 수 있다. Therefore, according to the present invention, the manufacturing process can be shortened and easily realized, and in particular, the number of components can be reduced since the components of the cap assembly are not required.
이하, 본 발명을 실현하기 위한 바람직한 실시예를 첨부 도면에 의거하여 보다 상세하게 설명한다. 참고로 본 발명의 구성을 설명함에 있어 종래 기술에서 설명된 부분과 동일한 구성에 대하여는 동일 부호를 부여하기로 한다.EMBODIMENT OF THE INVENTION Hereinafter, preferred embodiment for implementing this invention is demonstrated in detail based on an accompanying drawing. For reference, in the description of the configuration of the present invention will be given the same reference numerals for the same components as those described in the prior art.
도 1은 본 발명에 의한 이차전지의 분리된 구성을 나타내고 있으며, 도 2는 본 발명에 의한 이차전지의 외관을 보여주고 있다.1 shows a separate configuration of a secondary battery according to the present invention, Figure 2 shows the appearance of a secondary battery according to the present invention.
도면에서와 같이 본 발명은 정극과 부극의 사이에 세퍼레이터를 개재하여 함께 권취하고, 이것을 압착한 다음 끝단부에 테이프(2c)를 부착하여 고정하므로 전극 롤(2)을 형성하고 있다. 여기서 전극 롤(2)의 상부 혹은 하부의 일측으로는 정극에서 인출된 탭(2a)과 부극에서 인출된 탭(2b)이 돌출되는데, 이것은 동시에 같은 방향으로 위치한다.In the present invention, as shown in the drawing, the electrode roll 2 is formed by winding together with a separator between the positive electrode and the negative electrode, compressing it, and then attaching and fixing the tape 2c to the end. Here, the tab 2a drawn out of the positive electrode and the tab 2b drawn out of the negative electrode protrude from one side of the upper or lower portion of the electrode roll 2, which are simultaneously positioned in the same direction.
이렇게 형성된 전극 롤(2)은 종래 전지의 조립 공정중에 작고 좁은 전해액 주입구를 통한 전해액 함침 시간이 많이 소요되었던 점을 감안하여, 롤 권취후 전해액 조(槽)에 미리 함침함으로써 조립 공정 시간의 단축을 도모하고 있다.The electrode roll 2 formed as described above takes a lot of electrolyte impregnation time through a small and narrow electrolyte injection hole during the assembly process of the battery, and thus, the assembly process time is shortened by impregnating the electrolyte bath after the roll winding in advance. We are planning.
또 상기한 전극 롤(2)은 종래 별도의 지지수단 없이 캔 내부에 수납되어 밀봉되므로 전지의 충·방전시 혹은 외부 충격시 활물질의 탈락 및 열화가 발생하였던 점을 감안하여, 전극 롤(2)의 외부를 홀딩부재(22)를 이용하여 그립핑하므로 전지의 충·방전에 따른 부피 팽창 및 수축을 억제하고 있다.In addition, since the electrode roll 2 is conventionally housed and sealed inside a can without a separate supporting means, in view of the fact that dropping and deterioration of the active material occurred during charging and discharging of the battery or during external impact, the electrode roll 2 is used. Since the outside of the gripping using the holding member 22, the volume expansion and contraction caused by the charge and discharge of the battery is suppressed.
홀딩부재(22)는 전해액과의 반응을 고려하여, 폴리프로필렌, 폴리에틸렌, 폴리비닐리덴 플로라이드, 테프론, 스텐인레스, 철 및 알루미늄 중에서 하나의 재질로 형성할 수 있다.The holding member 22 may be formed of one of polypropylene, polyethylene, polyvinylidene fluoride, teflon, stainless steel, iron, and aluminum in consideration of the reaction with the electrolyte.
이렇게 구성된 전극 롤(2)은 본 발명을 구성하는 케이스(40)의 내부로 수납되는 바, 상기 케이스(40)는 중량을 낮추기 위하여 알미늄 적층판을 사용하고 있으며, 일측면 전체가 개방되는 구조의 뚜껑(42)을 구비하고 있다.The electrode roll 2 configured as described above is housed inside the case 40 constituting the present invention, and the case 40 uses an aluminum laminate to lower the weight, and a lid having a structure in which one side is opened. (42) is provided.
케이스(40)의 내부로 수납되는 전극 롤(2)은 개구의 일측으로 정극 및 부극에서 인출된 정극 탭(2a) 및 부극 탭(2b)이 노출되게 한 상태에서, 뚜껑(42)을 닫고 히트 실링하므로 도 2와 같은 완제품의 이차전지를 제작할 수 있다.The electrode roll 2 accommodated in the case 40 is closed with the lid 42 in a state in which the positive electrode tab 2a and the negative electrode tab 2b drawn out from the positive electrode and the negative electrode are exposed to one side of the opening. Since the sealing, it is possible to manufacture a secondary battery of the finished product as shown in FIG.
여기서 본 발명의 이차전지는 종래와 달리 캡 어셈블리의 구성품들이 제거되므로, 부품의 수를 줄이고 제조 공정을 단축할 수 있으나, 안전장치의 구성도 함께 제거되는 문제점이 있다.Here, since the secondary battery of the present invention removes the components of the cap assembly unlike the prior art, it is possible to reduce the number of components and shorten the manufacturing process, but there is a problem that the configuration of the safety device is also removed.
이러한 점을 고려하여 본 발명에서는 케이스(40)를 실링함에 있어, 이중으로 히트 프레싱(heat pressing)하여 실링하고, 그 압착력을 전지의 내압이 이상으로 될 때 파단되도록 함으로써 안전장치를 구성하고 있다.In consideration of this point, in the present invention, when sealing the case 40, the heat press is doubled to seal the pressure, and the compressive force of the battery is increased. The safety device is constructed by breaking when it is abnormal.
이상에서 설명한 구성 및 작용을 통하여 알 수 있듯이, 본 발명의 이차전지 및 그 제조방법에 의하면 종래 기술의 문제점을 실질적으로 해소할 수 있다.As can be seen through the configuration and operation described above, the secondary battery of the present invention and its manufacturing method can substantially solve the problems of the prior art.
즉 본 발명은 전극 롤을 권취후 전해액에 함침하므로 전지의 조립 공정중에 발생하는 시간 손실을 방지할 수 있으며, 그 전극 롤을 홀딩부재로 그립핑하므로 전지의 충·방전시 발생하는 부피 팽창을 억제하고 활물질의 탈락 및 열화를 방지할 수 있는 것이다.That is, according to the present invention, the electrode roll is wound up and impregnated in the electrolyte solution, thereby preventing time loss occurring during the assembly process of the battery, and the electrode roll is gripped by the holding member, thereby suppressing volume expansion occurring during charging and discharging of the battery. It is possible to prevent the falling off and deterioration of the active material.
또 본 발명은 케이스를 알미늄 적층판으로 만들고 이중 히트 실링하므로, 그 실링 압력에 의해 안전장치를 구현할 수 있으며 아울러 경량화를 실현할 수 있다.In addition, according to the present invention, since the case is made of an aluminum laminate and double heat sealing, a safety device can be realized by the sealing pressure and weight can be realized.
따라서 본 발명에 의하면 제조 공정이 단축되고 용이하게 실현되며, 부품 수를 최소화하므로 생산성을 향상시키고 제조 비용을 절감할 수 있다.Therefore, according to the present invention, the manufacturing process can be shortened and easily realized, and the number of parts can be minimized, thereby improving productivity and reducing manufacturing costs.
도 1은 본 발명에 의한 이차전지의 조립 상태를 보인 분리 사시도.1 is an exploded perspective view showing an assembled state of a secondary battery according to the present invention;
도 2는 본 발명의 이차전지를 도시한 사시도.Figure 2 is a perspective view of a secondary battery of the present invention.
도 3은 종래 공지된 이차전지를 도시한 분리 사시도.Figure 3 is an exploded perspective view showing a conventionally known secondary battery.
* 도면의 주요 부분에 대한 부호의 설명 *Explanation of symbols on the main parts of the drawings
2-전극 롤 2a-정극 탭2-electrode roll 2a-positive electrode tab
2b-부극 탭 22-홀딩부재2b-negative tap 22-holding member
40-케이스 42-뚜껑40-case 42-lid
Claims (4)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR10-1999-0010729A KR100528900B1 (en) | 1999-03-29 | 1999-03-29 | Secondary battery and method for making the same |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR10-1999-0010729A KR100528900B1 (en) | 1999-03-29 | 1999-03-29 | Secondary battery and method for making the same |
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| Publication Number | Publication Date |
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| KR20000061587A KR20000061587A (en) | 2000-10-25 |
| KR100528900B1 true KR100528900B1 (en) | 2005-11-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| KR10-1999-0010729A KR100528900B1 (en) | 1999-03-29 | 1999-03-29 | Secondary battery and method for making the same |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104584305A (en) * | 2012-11-08 | 2015-04-29 | 株式会社Lg化学 | Method for manufacturing secondary battery |
| US9819048B2 (en) | 2012-11-08 | 2017-11-14 | Lg Chem, Ltd. | Method of manufacturing secondary battery |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100686797B1 (en) * | 2005-07-07 | 2007-02-26 | 삼성에스디아이 주식회사 | Fabrication method of the secondary battery |
| KR100894409B1 (en) * | 2006-05-15 | 2009-04-24 | 주식회사 엘지화학 | Secondary Battery Having Improved Safety by Fixing Separator to Battery Case |
| WO2014073899A1 (en) * | 2012-11-08 | 2014-05-15 | 주식회사 엘지화학 | Method for manufacturing secondary battery |
| KR102019061B1 (en) * | 2015-09-08 | 2019-09-10 | 주식회사 엘지화학 | Secondary Battery Comprising Electrode Assembly with Protrusion Portion and Storage Member for Electrolyte |
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1999
- 1999-03-29 KR KR10-1999-0010729A patent/KR100528900B1/en not_active IP Right Cessation
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104584305A (en) * | 2012-11-08 | 2015-04-29 | 株式会社Lg化学 | Method for manufacturing secondary battery |
| US9819045B2 (en) | 2012-11-08 | 2017-11-14 | Lg Chem, Ltd. | Method of manufacturing secondary battery |
| US9819048B2 (en) | 2012-11-08 | 2017-11-14 | Lg Chem, Ltd. | Method of manufacturing secondary battery |
| US10062896B2 (en) | 2012-11-08 | 2018-08-28 | Lg Chem, Ltd. | Method of manufacturing secondary battery |
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| KR20000061587A (en) | 2000-10-25 |
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