KR100277652B1 - Cap Assembly of Secondary Battery - Google Patents
Cap Assembly of Secondary Battery Download PDFInfo
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- KR100277652B1 KR100277652B1 KR1019980036262A KR19980036262A KR100277652B1 KR 100277652 B1 KR100277652 B1 KR 100277652B1 KR 1019980036262 A KR1019980036262 A KR 1019980036262A KR 19980036262 A KR19980036262 A KR 19980036262A KR 100277652 B1 KR100277652 B1 KR 100277652B1
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- KR
- South Korea
- Prior art keywords
- cap
- cap assembly
- internal pressure
- secondary battery
- cap plate
- Prior art date
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- 230000000903 blocking effect Effects 0.000 claims abstract description 8
- 239000012212 insulator Substances 0.000 claims abstract description 7
- 229910001285 shape-memory alloy Inorganic materials 0.000 claims abstract 2
- 229910045601 alloy Inorganic materials 0.000 claims description 16
- 239000000956 alloy Substances 0.000 claims description 16
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 8
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 8
- 239000003792 electrolyte Substances 0.000 claims description 4
- 229910052742 iron Inorganic materials 0.000 claims description 4
- 229910052759 nickel Inorganic materials 0.000 claims description 4
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims description 2
- 229910052804 chromium Inorganic materials 0.000 claims description 2
- 239000011651 chromium Substances 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 6
- 230000000694 effects Effects 0.000 abstract 1
- 239000000203 mixture Substances 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 9
- 229910001416 lithium ion Inorganic materials 0.000 description 6
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 5
- 238000007599 discharging Methods 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 3
- 239000011244 liquid electrolyte Substances 0.000 description 3
- 230000002159 abnormal effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000004880 explosion Methods 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 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
- 230000005856 abnormality Effects 0.000 description 1
- 239000011149 active material Substances 0.000 description 1
- 150000001721 carbon Chemical class 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000002788 crimping Methods 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
- 229910052744 lithium Inorganic materials 0.000 description 1
- 229910003002 lithium salt Inorganic materials 0.000 description 1
- 159000000002 lithium salts Chemical class 0.000 description 1
- 229910021437 lithium-transition metal oxide Inorganic materials 0.000 description 1
- 230000003446 memory effect Effects 0.000 description 1
- 239000007773 negative electrode material Substances 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 239000007774 positive electrode material Substances 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 239000000126 substance Substances 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
- H01M50/572—Means for preventing undesired use or discharge
- H01M50/574—Devices or arrangements for the interruption of current
- H01M50/578—Devices or arrangements for the interruption of current in response to pressure
-
- 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
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
-
- 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
- H01M50/102—Primary casings; Jackets or wrappings characterised by their shape or physical structure
- H01M50/107—Primary casings; Jackets or wrappings characterised by their shape or physical structure having curved cross-section, e.g. round or elliptic
-
- 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
- H01M50/166—Lids or covers characterised by the methods of assembling casings with lids
-
- 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
- H01M2200/00—Safety devices for primary or secondary batteries
- H01M2200/20—Pressure-sensitive devices
-
- 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)
- Materials Engineering (AREA)
- Gas Exhaust Devices For Batteries (AREA)
- Secondary Cells (AREA)
Abstract
목적 : 안전장치의 구조를 단순화하면서도 안전성을 보장할 수 있는 이차전지의 캡 어셈블리를 제공하는 것이 목적이다.Purpose: To provide a cap assembly of a secondary battery that can guarantee the safety while simplifying the structure of the safety device.
구성 : 정극단자인 캡 커버(46)와, 내압 상승시 파단하는 캡 플레이트(50)와, 절연체(52)를 사이에 두고 상기 캡 플레이트(50)와 접촉된 상태에서 내압 상승시 선택적으로 단락되는 형상기억합금으로 된 전류차단수단(54)이 상부로부터 적층되어 구성되어지는 캡 어셈블리(30)를 제공한다.Composition: The cap cover 46, which is a positive electrode terminal, the cap plate 50 that breaks when the internal pressure rises, and the short circuit when the internal pressure rises while being in contact with the cap plate 50 with the insulator 52 interposed therebetween. Provided is a cap assembly 30 in which a current blocking means 54 made of a shape memory alloy is laminated from the top.
효과 : 전지의 내압과 온도상승에 따른 위험을 방지할 수 있고, 구조가 단순하여 조립공정시 생산성을 향상시킬 수 있다.Effect: It is possible to prevent the risks caused by the internal pressure and temperature rise of the battery. Its simple structure improves productivity during the assembly process.
Description
본 발명은 이차전지의 캡 어셈블리에 관한 것으로서, 특히 전지의 내압 상승이나 전해질의 화학반응에 따른 폭발 위험성을 방지할 수 있는 안전장치가 내장되는 이차전지의 캡 어셈블리에 관한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cap assembly of a secondary battery, and more particularly, to a cap assembly of a secondary battery having a built-in safety device that can prevent explosion risk due to an increase in internal pressure of a battery or a chemical reaction of an electrolyte.
이차전지는 활물질이 도포된 정·부극판(substrate)을 세퍼레이터와 함께 권취하여 캔에 삽입한 후 이 캔에 전해물질을 주입하고, 전류를 인가했을 때 전해액의 분자들과 활물질 사이에서 발생하는 물리화학적 반응을 이용한 전지이다.In the secondary battery, a positive electrode plate coated with an active material and a separator are wound together with a separator, inserted into a can, and then an electrolyte is injected into the can. It is a battery using a chemical reaction.
이 전지는 재충전이 가능하여 포타블화하는 전자전기제품과 함께 점점 더 널리 사용되어지고 있으며, 대표적인 것으로 니켈수소(Ni-MH)전지와 리튬(Li)전지 및 리튬이온(Li-ion)전지가 있다.This battery is being used more and more widely along with the portable electronic products which can be recharged, and are representative of nickel-hydrogen (Ni-MH) batteries, lithium (Li) batteries, and lithium-ion (Li-ion) batteries. .
리튬이온전지는 정극 활물질로 리튬-천이금속산화물이 사용되고, 부극 활물질로 탄소 혹은 탄소복합체가 사용되며, 그 사이에 유기 용매에 리튬염을 녹인 액체 전해질이 주입되어서, 상기 정극과 부극간에 리튬 이온이 이동되고 기전력이 발생되게 함으로써 충·방전이 이루어지도록 한다.Lithium ion batteries use lithium-transition metal oxides as positive electrode active materials, carbon or carbon complexes as negative electrode active materials, and a liquid electrolyte in which lithium salt is dissolved in an organic solvent is injected therebetween, so that lithium ions are formed between the positive electrode and the negative electrode. It moves and causes electromotive force to be charged and discharged.
도 3에서 종래 공지된 리튬 이온전지를 나타내고 있다.3 shows a conventionally known lithium ion battery.
리튬 이온전지는 정극(2)과 세퍼레이터(4) 및 부극(6)이 함께 권취된 전극 롤(8)을 액체 전해질과 함께 부극(6)과 접속된 캔(10)의 내부에 수납하고, 그 캔(10)의 상부에 정극(6)과 접속된 캡 어셈블리(12)가 가스켓(14)을 개재하여 캔(10)과 절연되는 구성으로 이루어진다.The lithium ion battery stores the electrode roll 8 in which the positive electrode 2, the separator 4, and the negative electrode 6 are wound together, together with the liquid electrolyte in the can 10 connected to the negative electrode 6, and The cap assembly 12 connected to the positive electrode 6 on the top of the can 10 is insulated from the can 10 via the gasket 14.
상기 캡 어셈블리(12)는 양극 단자의 기능을 갖는 캡 커버(16)와, 이(16)의 하부에 순차적으로 적층되는 전류 제한기(18), 안전밸브(20a)를 갖춘 캡 플레이트(20) 및 안전장치(22)의 순서로 적층된 상태에서 캔(10)의 상부를 크림핑(Crimping)함에 의해 어셈블리 및 밀봉된다.The cap assembly 12 includes a cap cover 16 having a function of a positive terminal, a current limiter 18 sequentially stacked below the teeth 16, and a cap plate 20 having a safety valve 20a. And by crimping the upper portion of the can 10 in a stacked state in the order of the safety devices 22.
상기 안전장치(22)는 절연체(24)를 개재한 전류차단 디스크(26)와 상기 캡 플레이트(20)가 용접되는 구성으로 되어, 전지의 충방전시 전해질과 전극 사이의 이상 화학반응에 따른 내부압력의 상승이나 기체 발생으로 인한 폭발 위험성을 방지하기 위한 것으로, 기체 발생으로 내압이 상승하면 캡 플레이트(20)의 중심부가 스웰링되어 상호 용접된 전류차단 디스크(26)와 캡 플레이트(20)가 떨어지게 되어 내부 전류를 차단하고, 더욱 상승되는 내압은 캡 플레이트(20)의 안전밸브(20a)가 파단하여 내부 기체를 외부로 누출시키게 되는 것이다.The safety device 22 has a configuration in which the current blocking disk 26 and the cap plate 20 are interposed between the insulator 24 and the interior of the battery according to an abnormal chemical reaction between the electrolyte and the electrode during charging and discharging of the battery. In order to prevent the explosion risk due to the increase in pressure or gas generation, when the internal pressure increases due to the gas generation, the central portion of the cap plate 20 is swelled and the welded current blocking disk 26 and the cap plate 20 are mutually welded. To fall off to cut off the internal current, the increased internal pressure is to break the safety valve 20a of the cap plate 20 to leak the internal gas to the outside.
그러나, 이러한 구조는 그 안전성을 보장함에도 불구하고, 구조가 복잡하여 조립공정의 생산성이 떨어지고, 조립시 발생하는 오차에 따른 불량율은 전지의 안전성을 보장하지 못하는 문제점이 있다.However, although such a structure guarantees its safety, the structure is complicated and productivity of the assembly process is lowered, and a defective rate due to an error occurring during assembly does not guarantee the safety of the battery.
이러한 문제점을 해결하기 위해서 본 발명은 캡 어셈블리의 안전장치의 구조를 단순화하면서도 안전성을 보장할 수 있는 이차전지의 캡 어셈블리를 제공하는 것이 목적이다.In order to solve this problem, an object of the present invention is to provide a cap assembly of a secondary battery capable of ensuring safety while simplifying the structure of a safety device of a cap assembly.
이를 위하여, 본 발명에 따른 이차전지의 캡 어셈블리는 정극단자인 캡 커버와, 내압 상승시 파단하는 캡 플레이트와, 절연체를 사이에 두고 상기 캡 플레이트와 접촉된 상태에서 내압 상승시 선택적으로 단락되는 형상기억합금으로 된 전류차단수단이 상부로부터 적층되어 구성되어진다.To this end, the cap assembly of the secondary battery according to the present invention is a shape that is selectively shorted when the internal pressure rises in contact with the cap plate with a cap cover which is a positive electrode terminal, a cap plate breaking when the internal pressure rises, and an insulator therebetween The current blocking means made of the storage alloy is laminated from the top.
한편, 상기 전류차단수단은 온도팽창율이 상이한 두 합금이 접합되는 바이메탈로 대체될 수 있다.On the other hand, the current blocking means may be replaced by a bimetal bonded to two alloys having different thermal expansion coefficients.
특히, 상기 합금 중에서 어느 하나는 철, 니켈로 구성되고, 나머지는 철, 니켈 및 크롬으로 구성될 수 있는 것이다.In particular, any one of the alloys may be composed of iron, nickel, the rest may be composed of iron, nickel and chromium.
도 1은 본 발명에 관련된 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 캡 어셈블리의 안전장치가 작동되는 과정을 도시한 상태도.Figure 2a and 2b is a state diagram showing the process of operating the safety device of the cap assembly.
도 3은 종래 공지된 이차전지의 캡 어셈블리를 도시한 측단면도.Figure 3 is a side cross-sectional view showing a cap assembly of a conventionally known secondary battery.
* 도면의 주요 부분에 대한 부호의 설명 *Explanation of symbols on the main parts of the drawings
30 : 캡 어셈블리 32 : 가스켓30 cap assembly 32 gasket
34 : 캔 42 : 전극롤34: can 42: electrode roll
44 : 안정장치 46 : 캡 커버44: stabilizer 46: cap cover
48 : 배출구 50 : 캡 플레이트48: outlet 50: cap plate
52 : 절연체 54 : 전류차단수단52: insulator 54: current blocking means
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 이차전지의 캡 어셈블리를 도시한 측단면도이고, 도 2a와 도 2b는 캡 어셈블리의 안전장치가 작동되는 과정을 도시한 상태도이다.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 state diagram showing a process of operating the safety device of the cap assembly.
도면 부호 30은 캡 어셈블리로써 가스켓(32)을 개재하여 캔(34)과 절연된 상태로 캔(34)의 개부를 밀봉하게 되는 것으로, 캔(34)의 내부에는 정극(36)과 세퍼레이터(38) 및 부극(40)을 함께 권취한 전극 롤(42)이 액체 전해질과 함께 수납된다.Reference numeral 30 denotes a cap assembly which seals the opening of the can 34 while being insulated from the can 34 via the gasket 32. The positive electrode 36 and the separator 38 are inside the can 34. ) And the electrode roll 42 wound together with the negative electrode 40 are housed together with the liquid electrolyte.
상기 캡 어셈블리(30)는 전극 롤(42)의 정극(36)과 접속된 후술하는 안전장치(44)와, 이(44)의 상부에 양극 단자의 기능을 갖는 캡 커버(46)가 적층된 구조로 되는 것이다. 특히 캡 커버(46)에는 전지의 내부에서 발생되는 기체를 외부로 방출되도록 하는 배출구(48)가 형성되어진다.The cap assembly 30 includes a safety device 44, which will be described later, connected to the positive electrode 36 of the electrode roll 42, and a cap cover 46 having a function of a positive electrode terminal on the teeth 44. It is a structure. In particular, the cap cover 46 is formed with a discharge port 48 for discharging the gas generated inside the battery to the outside.
상기 안전장치(44)는 캡 커버(46)의 하부에 위치하는 캡 플레이트(50)와, 그 하부에 절연체(52)를 사이에 두고 캡 플레이트(50)의 중심부에 접촉되는 전류 차단수단(54)으로 구성된다.The safety device 44 includes a cap plate 50 positioned under the cap cover 46 and a current interruption means 54 contacting the center of the cap plate 50 with an insulator 52 interposed therebetween. It is composed of
캡 플레이트(50)는 그 중심부에 노치를 갖춘 안전밸브(56)가 형성되어져 전지의 내압 상승시 파단함으로써 기체를 외부로 누출시키게 되며, 전류 차단수단(54)은 본 발명의 특징에 따라 형상기억합금(shape memory effect)이나 온도팽창율이 상이한 두 합금을 접합한 바이메탈(bimetal)이 사용될 수 있다.The cap plate 50 is provided with a safety valve 56 having a notch at the center thereof, and when the internal pressure of the battery rises, the cap plate 50 leaks the gas to the outside, and the current blocking means 54 has a shape memory according to the characteristics of the present invention. An alloy (shape memory effect) or bimetal joining two alloys with different thermal expansion rates may be used.
상기 바이메탈을 구성하는 두 합금 중에서 일측은 팽창율이 높은 고팽창 합금(54a)이고, 타측은 고팽창 합금에 비해 상대적으로 팽창율이 낮은 저팽창 합금(54b)이다.Of the two alloys constituting the bimetal, one side is a high expansion alloy 54a having a high expansion rate, and the other side is a low expansion alloy 54b having a relatively low expansion rate as compared with the high expansion alloy.
이에 따라, 고팽창 합금(54a)만이 캡 플레이트(50)와 접촉되고 저팽창 합금(54b)은 접촉되지 않은 상태에서 전지의 충방전시 이상 기체의 발생으로 내압이 상승하면 내부 온도가 상승되고, 이 때 도 2a에 도시한 바와 같이 고팽창 합금(54a)이 캡 플레이트(50)에서 떨어져서 전류의 흐름을 차단하게 되며, 전지의 내부에 계속 기체가 발생하여 내압을 상승시키고 캡 플레이트(50)의 안전밸브(56)는 곧 파단에 이르며 누출된 기체는 캡 커버(46)의 배출구(48)를 통해 외부로 방출된다.Accordingly, when only the high expansion alloy 54a is in contact with the cap plate 50 and the low expansion alloy 54b is not in contact with the cap plate 50, the internal temperature is increased when the internal pressure increases due to the generation of an abnormal gas during charging and discharging of the battery. At this time, as shown in Figure 2a, the high-expansion alloy (54a) is separated from the cap plate 50 to block the flow of current, the gas continues to generate inside the battery to increase the internal pressure to increase the pressure of the cap plate 50 The safety valve 56 soon breaks and the leaked gas is discharged to the outside through the outlet 48 of the cap cover 46.
결과적으로 종래 공지된 안전장치와 동일한 안전성을 보장하면서도 부품이 적고 구조가 단순하여 조립공정의 용이성과 생산성을 향상시킬 수 있다.As a result, while ensuring the same safety as conventionally known safety devices, fewer parts and simple structure can improve the ease and productivity of the assembly process.
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 커버의 하부에 안전밸브가 내장된 캡 플레이트를 위치시키고, 그 하부에 절연체에 이어 캡 플레이트에 접촉된 바이메탈을 부착함으로써 전지의 충방전시 화학적 이상반응에 따른 내압증가와 온도 상승으로 인한 위험 상태에서 온도 팽창율이 상이한 두 합금이 동작하여 캡 플레이트에 접촉된 고팽창 합금을 떨어지도록 함으로써 전류를 차단하고 안전밸브가 파단하여 기체를 외부로 방출시킬 수 있다.That is, by placing a cap plate with a built-in safety valve in the lower part of the cap cover, and attaching a bimetal contacting the cap plate to an insulator after the lower part of the cap cover, due to an increase in pressure and temperature increase due to a chemical abnormality during charging and discharging of the battery The two alloys with different thermal expansion rates in the dangerous state can operate to cause the high expansion alloy to come in contact with the cap plate to cut off the current and break the safety valve to release the gas to the outside.
또한, 캡 어셈블리의 구조를 단순하게 함으로써 조립공정에서의 생산성을 향상시키게 된다.In addition, by simplifying the structure of the cap assembly to improve the productivity in the assembly process.
Claims (3)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019980036262A KR100277652B1 (en) | 1998-09-03 | 1998-09-03 | Cap Assembly of Secondary Battery |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019980036262A KR100277652B1 (en) | 1998-09-03 | 1998-09-03 | Cap Assembly of Secondary Battery |
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| Publication Number | Publication Date |
|---|---|
| KR20000018606A KR20000018606A (en) | 2000-04-06 |
| KR100277652B1 true KR100277652B1 (en) | 2001-04-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR1019980036262A KR100277652B1 (en) | 1998-09-03 | 1998-09-03 | Cap Assembly of Secondary Battery |
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| Country | Link |
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| KR (1) | KR100277652B1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100452541B1 (en) * | 2001-05-10 | 2004-10-12 | 알프스 덴키 가부시키가이샤 | Battery cover unit |
| US10361421B2 (en) | 2015-02-26 | 2019-07-23 | Samsung Sdi Co., Ltd. | Rechargeable battery |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100886570B1 (en) * | 2006-08-14 | 2009-03-05 | 주식회사 엘지화학 | Secondary Battery Having Gas Exhaust Part of Shape Memory Alloy and Elastic Member |
| KR101678727B1 (en) * | 2014-02-17 | 2016-11-23 | 주식회사 엘지화학 | Cap assembly and cylinderical type battery comprising the same |
| KR102242243B1 (en) | 2016-08-09 | 2021-04-20 | 주식회사 엘지화학 | Battery and method of manufacturing the same |
-
1998
- 1998-09-03 KR KR1019980036262A patent/KR100277652B1/en not_active IP Right Cessation
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100452541B1 (en) * | 2001-05-10 | 2004-10-12 | 알프스 덴키 가부시키가이샤 | Battery cover unit |
| US10361421B2 (en) | 2015-02-26 | 2019-07-23 | Samsung Sdi Co., Ltd. | Rechargeable battery |
Also Published As
| Publication number | Publication date |
|---|---|
| KR20000018606A (en) | 2000-04-06 |
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