KR100300403B1 - Cap assembly of secondary battery - Google Patents
Cap assembly of secondary battery Download PDFInfo
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- KR100300403B1 KR100300403B1 KR1019980036264A KR19980036264A KR100300403B1 KR 100300403 B1 KR100300403 B1 KR 100300403B1 KR 1019980036264 A KR1019980036264 A KR 1019980036264A KR 19980036264 A KR19980036264 A KR 19980036264A KR 100300403 B1 KR100300403 B1 KR 100300403B1
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- South Korea
- Prior art keywords
- cap assembly
- battery
- riveting
- rivet
- plate
- Prior art date
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- 239000011248 coating agent Substances 0.000 claims abstract description 9
- 238000000576 coating method Methods 0.000 claims abstract description 9
- 239000012212 insulator Substances 0.000 claims 1
- 238000007599 discharging Methods 0.000 abstract description 6
- 238000005259 measurement Methods 0.000 abstract description 2
- 229910001416 lithium ion Inorganic materials 0.000 description 9
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 8
- 239000003792 electrolyte Substances 0.000 description 8
- 239000000523 sample Substances 0.000 description 6
- 238000000034 method Methods 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 239000006182 cathode active material Substances 0.000 description 2
- 238000005323 electroforming Methods 0.000 description 2
- 238000005530 etching Methods 0.000 description 2
- 238000004880 explosion Methods 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 229910052744 lithium Inorganic materials 0.000 description 2
- 238000010297 mechanical methods and process Methods 0.000 description 2
- 229910000733 Li alloy Inorganic materials 0.000 description 1
- 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
- 230000002950 deficient Effects 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000001989 lithium alloy Substances 0.000 description 1
- 229910021437 lithium-transition metal oxide Inorganic materials 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
- 238000004804 winding 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
- H01M50/543—Terminals
-
- 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
- H01M10/05—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
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
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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
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/147—Lids or covers
- H01M50/148—Lids or covers characterised by their shape
- H01M50/15—Lids or covers characterised by their shape for prismatic or rectangular cells
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Connection Of Batteries Or Terminals (AREA)
- Secondary Cells (AREA)
Abstract
목적 : 원활한 충방전이나 개방전압 및 내부저항 등의 측정 작업이 이루어질 수 있도록 하여 전지의 불량율을 낮춘 이차전지의 캡 어셈블리를 제공하는 것이 목적이다.PURPOSE: To provide a cap assembly of a secondary battery having a low failure rate of a battery by allowing a smooth charging and discharging or an open voltage and an internal resistance measurement operation to be performed.
구성 : 양극 플레이트(42)는 상기 리벳(44)과 결합되는 리베팅부(42a)와, 이 리베팅부(42a)에 연장됨과 아울러 접혀지도록 하여 리벳 헤드를 덮는 피복부(42b)로 구성되어진다.Composition: The anode plate 42 is composed of a riveting portion (42a) coupled to the rivet 44, and a coating portion (42b) covering the rivet head to be folded and extended to the riveting portion (42a) Lose.
효과 : 전지의 충방전 작업이 양호하게 이루어지고, 전지의 개방 전압이나 내부저항의 데이터를 정확하게 산출하여 전지의 양품율을 향상시킬 수 있다.Effect: The battery can be charged and discharged satisfactorily, and the yield value of the battery can be improved by accurately calculating the data of the battery's open voltage and internal resistance.
Description
본 발명은 이차전지의 캡 어셈블리에 관한 것으로서, 더 상세하게는 전지의충방전이나 전지의 개방전압 및 내부저항을 측정하는 프로브와 접촉되는 캡 어셈블리의 구조를 개선하여 충방전의 안전성을 확보할 수 있는 이차전지의 캡 어셈블리에 관한 것이다.The present invention relates to a cap assembly of a secondary battery, and more specifically, to improve the structure of the cap assembly in contact with the probe for measuring the charge and discharge of the battery or the open voltage and internal resistance of the battery to ensure the safety of charging and discharging. The present invention relates to a cap assembly of a secondary battery.
이차전지는 재충전이 가능하고 소형 및 대용량화가 가능한 것으로서, 대표적인 것으로 니켈수소(Ni-MH)전지와 리튬(Li) 및 리튬이온(Li-ion)전지가 사용되고 있다.Rechargeable batteries can be recharged, miniaturized, and large-capacity, and are representative of nickel-hydrogen (Ni-MH) batteries, lithium (Li), and lithium-ion (Li-ion) batteries.
여기서, 리튬이온전지는 양극활물질로 리튬-천이금속산화물이 사용되고, 음극활물질로 리튬금속, 리튬합금, 탄소 혹은 탄소복합체가 사용되어서, 양극과 음극간에 리튬 이온이 이동되어 기전력을 발생시키므로서, 충·방전이 이루어지도록 한다.Here, the lithium ion battery uses lithium-transition metal oxide as the cathode active material, and lithium metal, lithium alloy, carbon or carbon complex is used as the cathode active material, and lithium ions are moved between the anode and the cathode to generate electromotive force, Allow discharge to occur.
도 6a와 도 6b는 종래 공지된 각형 리튬이온 이차전지의 전체 구조를 부분 절개하여 도시한 평면도와 측단면도이다.6A and 6B are a plan view and a side cross-sectional view showing a partial cutaway of the entire structure of a conventionally known square lithium ion secondary battery.
리튬이온전지는 양극과 세퍼레이터 및 음극이 함께 권취된 전극 롤(2)이 상기 음극과 접속된 캔(4)의 내부에 수납되고, 그 캔(4)의 상부에 캡 어셈블리(6)가 설치되어서 용접에 의해 밀봉되는 구조로 이루어진다. 전극 롤(2)의 상면과 하면에는 캡 어셈블리(6) 및 캔(4)과의 접촉을 방지하기 위해 각각 절연판(8)이 설치된다.In a lithium ion battery, an electrode roll 2 wound around a positive electrode, a separator, and a negative electrode is housed in a can 4 connected to the negative electrode, and a cap assembly 6 is installed on the can 4. It is made of a structure that is sealed by welding. An insulating plate 8 is provided on the upper and lower surfaces of the electrode roll 2 to prevent contact with the cap assembly 6 and the can 4, respectively.
캡 어셈블리(6)는 캔(4)의 상부에 용접되는 음극 플레이트(10)와 그 중심에 배치되는 양극 플레이트(12)를 포함하고, 음극 플레이트(10)와 양극 플레이트(12)의 사이에 절연판(14)이 설치되며, 음극 플레이트(10)와 양극 플레이트(12)의 중심을 관통하여 결합되는 리벳(16)이 전극 롤(2)의 양극과 탭(18)으로 연결되어서 전기적으로 접속된 구조로 이루어진다. 리벳(16)은 별도의 가스켓(20)을 개재하여 음극 플레이트(10)와 절연된다.The cap assembly 6 includes a negative electrode plate 10 welded to the top of the can 4 and a positive electrode plate 12 disposed at the center thereof, and an insulating plate between the negative electrode plate 10 and the positive electrode plate 12. 14 is provided, the rivet 16 coupled through the center of the negative electrode plate 10 and the positive electrode plate 12 is connected to the positive electrode and the tab 18 of the electrode roll 2 and electrically connected Is made of. The rivet 16 is insulated from the negative electrode plate 10 through a separate gasket 20.
상기 음극 플레이트(10)에는 전해액을 주입시키는 전해액 주입구(22)가 형성되며, 전해액을 주입한 다음에는 플러그(24)를 삽입하고 용접하여 밀봉된다. 또, 음극 플레이트(10)에 기계적인 방법이나 에칭 및 전기주형법으로 일정한 홈을 형성한 파단변(26)을 설치하여 리튬이온전지는 내압의 이상 상승에 따른 폭발을 방지하는 것이다.The negative electrode plate 10 is formed with an electrolyte injection hole 22 for injecting an electrolyte, and after the electrolyte is injected, a plug 24 is inserted and welded to seal the electrolyte. In addition, by providing a fracture side 26 having a constant groove formed in the negative electrode plate 10 by a mechanical method, an etching method or an electroforming method, a lithium ion battery prevents explosion due to an abnormal rise in internal pressure.
이와 같은 구조로 이루어진 각형 리튬이온 이차전지는 캡 어셈블리(6)를 구성하는 음극 플레이트(10)와 양극 플레이트(12)를 결합하기 위해서 실행되는 리벳팅에 의해 양극 플레이트(12)에 굴곡부(28)가 생기기 마련이다.The rectangular lithium ion secondary battery having such a structure has a bent portion 28 on the positive electrode plate 12 by riveting to be coupled to the negative electrode plate 10 and the positive electrode plate 12 constituting the cap assembly 6. There is a possibility.
상기와 같은 굴곡부로 인해서 프로브에 의한 충방전 작업이 원활하게 이루어지지 못한다. 즉, 리벳 헤드의 중심부에 접촉되어져야 하는 프로브의 전압 단자와 전류단자가 굴곡부로 인해서 접촉불량 상태로 전지의 충방전 작업이 이루어짐으로써 원하는 작업 결과를 얻지 못한다.Due to the bent portion as described above, the charging and discharging operation by the probe may not be performed smoothly. That is, the voltage terminal and the current terminal of the probe, which should be in contact with the center of the rivet head, do not obtain the desired work result because the charging / discharging operation of the battery is performed in a poor contact state due to the bent portion.
이러한 문제점을 해결하기 위해서 본 발명은 프로브 핀과 접촉되는 양극 플레이트의 구조를 개선하여 접촉이 용이하도록 함으로써 원활한 충방전이나 개방전압 및 내부저항 등의 측정 작업이 이루어질 수 있도록 하여 전지의 불량율을 낮춘 이차전지의 캡 어셈블리를 제공하는 것이 목적이다.In order to solve this problem, the present invention improves the structure of the positive electrode plate in contact with the probe pin to facilitate contact, thereby making it possible to perform a smooth charging and discharging or an open voltage and an internal resistance measurement operation, thereby lowering a defective rate of the battery. It is an object to provide a cap assembly of a battery.
이를 위하여, 양극 플레이트가 리벳과 결합되는 리베팅부와, 이 리베팅부에 연장됨과 아울러 접혀지도록 하여 리벳 헤드를 덮는 피복부로 구성되어진다.To this end, the anode plate is composed of a riveting portion coupled with the rivet, and a coating portion covering the rivet head by being extended and folded.
특히, 상기 피복부는 리베팅부의 전체를 피복할 수 있도록 대칭되어질 수 있다.In particular, the coating part may be symmetrical to cover the entire riveting part.
또한, 상기 피복부는 상기 리베팅부의 적어도 일측 이상에 형성될 수 있거나, 상기 피복부는 상기 리베팅부의 대향되는 양측에 형성될 수 있다.In addition, the coating part may be formed on at least one side of the riveting part, or the coating part may be formed on opposite sides of the riveting part.
도 1은 본 발명에 따른 이차전지의 캡 어셈블리를 도시한 측단면도.1 is a side cross-sectional view showing a cap assembly of a secondary battery according to the present invention.
도 2a와 도 2b는 본 발명에 따른 이차전지의 캡 어셈블리를 도시한 평면도와 측단면도.2a and 2b are a plan view and a side cross-sectional view showing a cap assembly of a secondary battery according to the present invention.
도 3과 도 4 및 도 5는 캡 어셈블리의 다른 실시예들을 도시한 평면도.3 and 4 and 5 are plan views illustrating other embodiments of the cap assembly.
도 6a와 도 6b는 종래 공지된 이차전지의 캡 어셈블리를 도시한 평면도와 측단면도.6a and 6b are a plan view and a side cross-sectional view showing a cap assembly of a conventionally known secondary battery.
< 도면의 주요 부분에 대한 부호의 설명 ><Description of Symbols for Main Parts of Drawings>
30 : 캔32 : 전극롤30: can 32: electrode roll
34 : 캡 어셈블리36 : 절연판34 cap assembly 36 insulation plate
38 : 음극 플레이트40, 48 : 가스켓38 cathode plate 40, 48 gasket
42a : 리벳팅부42b : 피복부42a: riveting portion 42b: covering portion
42 : 양극 플레이트44 : 리벳42: anode plate 44: rivet
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 따른 이차전지의 캡 어셈블리를 도시한 측단면도이고, 도 2a와 도 2b는 캡 어셈블리를 도시한 평면도와 측단면도이다.1 is a side cross-sectional view showing a cap assembly of a secondary battery according to the present invention, Figures 2a and 2b is a plan view and a side cross-sectional view showing a cap assembly.
리튬이온전지는 외관을 형성하는 캔(30)과, 그 내부에 수납되어지는 전극 롤(32)과, 캔(30)의 개구에 용접되어지는 캡 어셈블리(34)로 구성되어진다.The lithium ion battery is composed of a can 30 forming an outer appearance, an electrode roll 32 housed therein, and a cap assembly 34 welded to an opening of the can 30.
상기 전극 롤(32)은 양극, 세퍼레이터 및 음극을 함께 권취한 후 프레싱하여 얻어지는 것이며, 이 전극롤(32)의 상면과 하면에는 캡 어셈블리(34) 및 캔(30)과의 접촉을 방지하기 위한 절연판(36)이 배치되는 것이다.The electrode roll 32 is obtained by winding the positive electrode, the separator, and the negative electrode together and pressing them, and the upper and lower surfaces of the electrode roll 32 to prevent contact with the cap assembly 34 and the can 30. The insulating plate 36 is disposed.
상기 캡 어셈블리(34)는 캔(30)의 상부에 용접되는 음극 플레이트(38)와 그 중심에 절연판(40)을 개재하여 후술하는 양극 플레이트(42)를 포함하며, 음극 플레이트(38)와 양극 플레이트(42)의 중심을 관통하는 리벳(44)이 리벳팅됨으로써 일체화된다.The cap assembly 34 includes a cathode plate 38 to be welded to an upper portion of the can 30 and an anode plate 42 to be described later with an insulating plate 40 in the center thereof, and the cathode plate 38 and the anode The rivet 44 penetrating the center of the plate 42 is integrated by riveting.
상기 리벳(44)의 하단부는 전극 롤(32)의 양극과 탭(46)으로 연결되어서 전기적으로 접속된 구조로 이루어지며, 리벳(44)은 별도의 가스켓(48)을 개재하여 음극 플레이트(38)와 절연되는 것이다.The lower end of the rivet 44 is connected to the positive electrode and the tab 46 of the electrode roll 32 to be electrically connected, the rivet 44 is a negative plate 38 through a separate gasket 48 ) Is insulated.
상기 음극 플레이트(38)에는 전해액을 주입시키는 전해액 주입구(50)가 형성되며, 전해액을 주입한 다음에는 플러그(52)를 삽입하고 용접하여 밀봉된다. 또, 음극 플레이트(38)에 기계적인 방법이나 에칭 및 전기주형법으로 일정한 홈을 형성한 파단변(54)을 설치하여 전지의 내압 이상 상승에 따른 폭발을 방지한다.The negative electrode plate 38 is formed with an electrolyte injection hole 50 for injecting an electrolyte, and after the electrolyte is injected, the plug 52 is inserted and welded to seal the electrolyte. In addition, a break edge 54 having a constant groove formed in the negative electrode plate 38 by a mechanical method, an etching method, or an electroforming method is provided to prevent explosion due to an abnormal internal pressure of the battery.
한편, 상기 양극 플레이트(42)는 본 발명의 특징에 따라 리벳팅부(42a)와 피복부(42b)로 구성되어지는데, 리벳팅부(42a)는 상술한 바와 같이 절연판(40)을 개재하여 음극 플레이트(38)와 절연된 상태로 리벳(44)에 의해 일체화된다.On the other hand, the positive electrode plate 42 is composed of a riveting portion 42a and the covering portion 42b in accordance with the features of the present invention, the riveting portion 42a through the insulating plate 40 as described above through the negative plate It is integrated by the rivet 44 in an insulated state from the 38.
상기 피복부(42b)는 리벳팅부(42a)의 장변측이나 단변측으로부터 연장되어져서 접혀짐으로써 리벳 헤드를 덮게 되고, 특히 리벳팅부(42a)와 대칭으로 형성되어 리벳팅부(42a)의 전체를 덮을 수 있도록 하며, 또 피복부(42b)는 도 3과 도 4 및 도 5에 도시한 바와 같이 리벳팅부(42a)의 장변측 혹은 단변측의 양쪽에 대칭으로 형성되어지거나 일측에 형성되어질 수 있는 것이다.The covering part 42b extends from the long side or short side of the riveting part 42a to be folded to cover the rivet head. The cover portion 42b may be formed symmetrically on both sides of the long side or short side of the riveting portion 42a, or may be formed on one side, as shown in FIGS. 3, 4, and 5. will be.
이에 따라, 종래 리벳 헤드에 접촉되어지던 프로브의 전압 단자와 전류 단자는 접혀지는 피복부의 상면에 접촉되어져 종래 굴곡부로 인해 접촉이 불량했던 전류 단자와 전압 단자가 양호한 상태로 접촉되어진다.As a result, the voltage terminal and the current terminal of the probe, which have been in contact with the rivet head, are in contact with the upper surface of the covering part to be folded, so that the current terminal and the voltage terminal, which are poor in contact due to the conventional bend, are in good contact.
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, 캡 어셈블리의 양극 플레이트를 리벳팅부와 피복부로 구성하여 피복부가 접혀진 상태로 리벳부를 덮을 수 있어 종래 리벳팅된 리벳의 헤드와 양극 플레이트의 굴곡부에 접촉 불량이 되었던 프로브의 전압 단자와 전류 단자가 피복부의 상면에 용이하게 접촉됨으로써 전지의 충방전이 안정된 상태로 이루어지고, 전지의 개방 전압 및 내부 저항을 측정할 때 정확한 데이터가 산출되어 전지의 양품율을 향상시킬 수 있게 된다.That is, the positive electrode plate of the cap assembly may be composed of a riveting part and a covering part to cover the rivet part while the covering part is folded, so that the voltage terminal and the current terminal of the probe, which had a poor contact between the head of the riveted rivet and the bent plate of the conventional riveting part, By easily contacting the upper surface of the coating part, the charging and discharging of the battery can be achieved in a stable state, and accurate data can be calculated when measuring the opening voltage and internal resistance of the battery, thereby improving the yield rate of the battery.
Claims (4)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019980036264A KR100300403B1 (en) | 1998-09-03 | 1998-09-03 | Cap assembly of secondary battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019980036264A KR100300403B1 (en) | 1998-09-03 | 1998-09-03 | Cap assembly of secondary battery |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| KR20000018608A KR20000018608A (en) | 2000-04-06 |
| KR100300403B1 true KR100300403B1 (en) | 2002-06-20 |
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ID=19549457
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR1019980036264A KR100300403B1 (en) | 1998-09-03 | 1998-09-03 | Cap assembly of secondary battery |
Country Status (1)
| Country | Link |
|---|---|
| KR (1) | KR100300403B1 (en) |
-
1998
- 1998-09-03 KR KR1019980036264A patent/KR100300403B1/en not_active IP Right Cessation
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| Publication number | Publication date |
|---|---|
| KR20000018608A (en) | 2000-04-06 |
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