KR100274897B1 - The safety apparatus of secondary battery - Google Patents
The safety apparatus of secondary battery Download PDFInfo
- Publication number
- KR100274897B1 KR100274897B1 KR1019980047936A KR19980047936A KR100274897B1 KR 100274897 B1 KR100274897 B1 KR 100274897B1 KR 1019980047936 A KR1019980047936 A KR 1019980047936A KR 19980047936 A KR19980047936 A KR 19980047936A KR 100274897 B1 KR100274897 B1 KR 100274897B1
- Authority
- KR
- South Korea
- Prior art keywords
- plate
- safety valve
- insulator
- current
- breaker
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 239000012212 insulator Substances 0.000 claims abstract description 24
- 239000011244 liquid electrolyte Substances 0.000 claims abstract description 7
- 239000011810 insulating material Substances 0.000 claims 1
- 230000002159 abnormal effect Effects 0.000 abstract description 8
- 238000004880 explosion Methods 0.000 abstract description 8
- 238000006073 displacement reaction Methods 0.000 abstract description 7
- 230000000903 blocking effect Effects 0.000 abstract description 3
- 230000000694 effects Effects 0.000 abstract 1
- 238000009413 insulation Methods 0.000 abstract 1
- 229910001416 lithium ion Inorganic materials 0.000 description 7
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 6
- 238000000034 method Methods 0.000 description 4
- 238000003466 welding Methods 0.000 description 3
- 238000002788 crimping Methods 0.000 description 2
- 229910052744 lithium Inorganic materials 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
- 150000001721 carbon Chemical class 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 230000003993 interaction Effects 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
- 230000007257 malfunction Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000010297 mechanical methods and process Methods 0.000 description 1
- 239000007773 negative electrode material Substances 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- PXHVJJICTQNCMI-UHFFFAOYSA-N nickel Substances [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 1
- -1 nickel hydrogen Chemical class 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 239000007774 positive electrode material Substances 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
Classifications
-
- 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
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
-
- 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
-
- 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
-
- 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
- H01M50/30—Arrangements for facilitating escape of gases
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Gas Exhaust Devices For Batteries (AREA)
- Secondary Cells (AREA)
- Connection Of Batteries Or Terminals (AREA)
Abstract
목적 : 전지의 비정상적인 작동으로 내부 압력이 규정 압력 이상으로 상승할 경우, 전류의 흐름을 차단하고 가스 압력을 방출하여 폭발을 방지하므로 전지 안전성을 확보할 수 있도록 한 이차전지의 안전장치를 제공함에 그 목적을 두고 있다.Purpose: To provide a safety device for secondary batteries that ensures battery safety when the internal pressure rises above the specified pressure due to abnormal operation of the battery, blocking the flow of current and releasing gas pressure to prevent explosion. The purpose is to.
구성 : 전극부(2)와 액체 전해질을 함께 캔(4)의 내부로 수납하고, 그 캔의 개구에 가스켓(6)을 개재하여 아래로부터 안전밸브를 갖춘 플레이트(14), 절연체(160) 및 캡 커버(10)를 순서대로 적층하여 밀봉한 구성을 포함하고; 상기 안전밸브를 갖춘 플레이트와 캡 커버의 사이에 전류차단기(180)를 연결하되, 그 전류차단기의 일단을 안전밸브를 갖춘 플레이트와 절연체의 사이로 삽입하고 또한 그 전류차단기의 타단을 절연체와 캡 커버의 사이로 삽입하며, 양단의 사이에 절연물(182)을 설치하여 안전밸브를 갖춘 플레이트의 가변부(14b)의 상승시 그 가변부와 접촉되도록 하므로, 전지의 내부 압력이 규정 압력 이상으로 상승할 경우 전류차단기가 전단되도록 한다.Composition: The electrode portion 2 and the liquid electrolyte are housed together in the can 4, and the plate 14, the insulator 160, and the safety valve are provided from below through the gasket 6 in the opening of the can. And a configuration in which the cap cover 10 is laminated in order and sealed; The current breaker 180 is connected between the plate with the safety valve and the cap cover, and one end of the current breaker is inserted between the plate with the safety valve and the insulator, and the other end of the current breaker is connected to the insulator and the cap cover. Insulation 182 is provided between the two ends so that the variable part 14b of the plate equipped with the safety valve is brought into contact with the variable part when the internal pressure of the battery rises above the specified pressure. Allow breaker to shear.
효과 : 안전밸브를 갖춘 플레이트의 가변부의 변위차와 전류차단기의 전단 강도에 의해 안전장치의 작동 압력을 정확하게 설정할 수 있고, 궁극적으로 전지의 이상 작동이나 폭발에 대한 안정성을 확보할 수 있다.Effect: By the displacement difference of the variable part of the plate with safety valve and the shear strength of the current breaker, the working pressure of the safety device can be set accurately, and ultimately, the stability of the battery against abnormal operation or explosion can be secured.
Description
본 발명은 전지의 비정상적인 작동으로 내부 압력이 규정 압력 이상으로 상승될 경우 작동되어서, 전류의 흐름을 차단하고 내부 가스 압력을 방출하여 폭발을 방지하므로 전지의 안전성을 확보할 수 있도록 하는 이차전지의 안전장치에 관한 것이다.The present invention operates when the internal pressure rises above the specified pressure due to abnormal operation of the battery, thereby preventing the explosion by blocking the flow of current and releasing the internal gas pressure, thereby ensuring the safety of the secondary battery to ensure the safety of the battery. Relates to a device.
이차전지는 재충전이 가능하고 소형 및 대용량화가 가능한 것이며, 대표적인 것으로 니켈수소(Ni-MH)전지와 리튬(Li)전지 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) batteries, and lithium ion (Li-ion) batteries.
이러한 이차전지로서 잘 알려진 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, which are well known as secondary batteries, use lithium-transition metal oxides as positive electrode active materials, carbon or carbon complexes as negative electrode active materials, and inject a liquid electrolyte in which lithium salt is dissolved in an organic solvent, thereby providing a positive electrode. Lithium ions are moved between the negative electrode and the negative electrode to generate an electromotive force so that charge and discharge are performed.
도 5는 종래 공지된 나선형(spirally-wound) 전극부를 갖는 리튬이온전지를 나타내고 있다. 정극과 세퍼레이터 및 부극이 함께 권취된 전극부(2)는 액체 전해질과 함께 상기 부극과 접속된 캔(4)의 내부로 수납되고, 그 캔(4)의 상부에는 가스켓(6)을 개재하여 절연되고 상기 정극과 접속되는 캡 어셈블리(8)가 설치된다.5 shows a lithium ion battery having a conventionally known spiral-wound electrode portion. The electrode portion 2 in which the positive electrode, the separator, and the negative electrode are wound together is housed together with the liquid electrolyte in the can 4 connected to the negative electrode, and the upper portion of the can 4 is insulated through a gasket 6. And a cap assembly 8 connected with the positive electrode is installed.
캡 어셈블리(8)는 위로부터 캡 커버(10)와 전류 제한기(12) 및 안전밸브를 갖춘 플레이트(14)의 순서로 적층되고, 안전밸브를 갖춘 플레이트(14)의 하부에는 절연체(16)를 개재하여 전류차단기(18)를 부착한 것이며, 캔(4)의 상부를 크림핑(Crimping) 및 기타 방법에 의해 어셈블리 및 밀봉된다. 전류차단기(18)는 정극과의 접속을 위해 조립 전에 정극 탭(20)과 용접된다.The cap assembly 8 is stacked from the top in the order of the cap cover 10, the current limiter 12 and the plate 14 with safety valve, and the insulator 16 at the bottom of the plate 14 with safety valve. The current circuit breaker 18 is attached to each other, and the top of the can 4 is assembled and sealed by crimping and other methods. The current breaker 18 is welded with the positive electrode tab 20 before assembly for connection with the positive electrode.
이렇게 구성된 리튬이온전지는 전지의 이상 작동이나 과부하시 정극에서 액체 전해질의 분해가 일어나고 부극에서 리튬 금속이 석출되어 쇼트될 수 있으며, 이때 내부의 압력이 규정된 압력 이상으로 상승되어 발열 및 폭발의 위험을 수반하게 된다.The lithium ion battery configured as described above may decompose the liquid electrolyte at the positive electrode during the abnormal operation or overload of the battery, and may precipitate due to the deposition of lithium metal at the negative electrode. Will accompany.
이런 까닭에 종래에는 안전밸브를 갖춘 플레이트(14)에 기계적인 방법이나 에칭법으로 일정한 깊이의 홈(14a)을 형성하거나 상대적으로 취약하게 변형 제작하여, 전지 내부의 압력이 규정 이상으로 상승될 경우 먼저 전류차단기(18)와의 용접 결합이 떨어지게 하고 또한 홈(14a) 및 취약부가 파단되게 함으로써, 전류의 흐름을 차단하고 내압을 감소시켜 폭발을 방지하고 있다.For this reason, conventionally, the groove 14a having a constant depth is formed or relatively weakly deformed by a mechanical method or an etching method on the plate 14 equipped with a safety valve, so that the pressure inside the battery rises above a specified level. First, the welding bond with the current breaker 18 is dropped and the groove 14a and the weak part are broken, thereby preventing the explosion by blocking the flow of current and reducing the internal pressure.
그러나 지금까지의 안전장치는 작동이 불량한 문제점이 있다. 예를 들어 안전밸브를 갖춘 플레이트(14)와 전류차단기(18)는 상호 용접에 의해 결합되어서 그 용접력에 의해 작동 압력이 결정되는 바, 기술적으로 상기 작동 압력을 정확하게 맞추기 어렵고, 특히 오 작동시 전지가 폭발하게 되는 위험까지 따르는 문제점이 있다.However, until now, the safety device has a problem of poor operation. For example, the plate 14 with the safety valve and the current circuit breaker 18 are joined by mutual welding so that the working pressure is determined by the welding force, which makes it difficult to precisely adjust the operating pressure technically, in particular in case of malfunction. There is a problem that the risk of explosion of the battery.
앞서 설명한 종래 기술의 문제점을 해결하기 위한 것으로서, 본 발명은 안전밸브를 갖춘 플레이트 및 전류차단기의 작동 압력을 보다 정확하게 설정할 수 있도록 하여, 궁극적으로 전지의 이상 작동이나 폭발에 대한 안정성을 확보할 수 있도록 한 이차전지의 안전장치를 제공함에 그 목적을 두고 있다.In order to solve the problems of the prior art described above, the present invention enables to more accurately set the operating pressure of the plate and the current circuit breaker with a safety valve, ultimately to ensure the stability of the battery abnormal operation or explosion Its purpose is to provide a safety device for a secondary battery.
이를 위하여 본 발명에서는 정극, 부극 및 세퍼레이터가 함께 권취된 전극부를 액체 전해질과 함께 캔의 내부로 수납하고, 그 캔의 개구에 아래로부터 안전밸브를 갖춘 플레이트, 절연체 및 캡 커버를 순서대로 적층하여 캡 어셈블리를 구성한 다음 이것을 밀봉한 구성으로 이루어지는 것이며, 상기 안전밸브를 갖춘 플레이트와 캡 커버의 사이에 전류차단기를 연결하되, 그 전류차단기의 일단을 안전밸브를 갖춘 플레이트와 절연체의 사이로 삽입하고 또한 그 전류차단기의 타단을 절연체와 캡 커버의 사이로 삽입한 것이며, 양단의 사이에 절연물을 설치하여 안전밸브를 갖춘 플레이트의 가변부의 상승시 그 가변부와 접촉되도록 하므로, 전지의 내부 압력이 규정 압력 이상으로 상승할 경우 전류차단기가 전단되도록 한 구성으로 이루어진다.To this end, in the present invention, the electrode portion wound together with the positive electrode, the negative electrode, and the separator is housed together with the liquid electrolyte into the can, and the plate, the insulator, and the cap cover having the safety valve from the bottom of the can are laminated in order. It consists of an assembly after the assembly is sealed, and a current breaker is connected between the plate with the safety valve and the cap cover, and one end of the current breaker is inserted between the plate with the safety valve and the insulator and the current The other end of the circuit breaker is inserted between the insulator and the cap cover, and an insulator is installed between both ends to make contact with the variable part when the variable part of the plate with the safety valve rises, so that the internal pressure of the battery rises above the specified pressure. In this case, the current circuit breaker is configured to be sheared.
여기서 전류차단기는 저면에 절연물을 부착하고 양단의 사이에 노치를 형성하거나, 또한 양단의 사이에 구멍을 형성하여 상기 절연물이 관통 결합되게 하므로, 그 전단 강도를 조정할 수 있다.In this case, the current breaker attaches an insulator to a bottom surface and forms a notch between both ends, or a hole is formed between both ends to allow the insulator to be coupled through, so that the shear strength can be adjusted.
따라서 본 발명에 의한 이차전지의 안전장치는 안전밸브를 갖춘 플레이트의 가변부의 변위차와 전류차단기의 전단 강도에 의해 작동 압력을 정확하게 설정할 수 있으며, 궁극적으로 전지의 이상 작동이나 폭발에 대한 안정성을 확보할 수 있다.Therefore, the safety device of the secondary battery according to the present invention can accurately set the operating pressure by the displacement difference of the variable portion of the plate with a safety valve and the shear strength of the current circuit breaker, ultimately ensuring the stability of abnormal operation or explosion of the battery can do.
도 1은 본 발명에 의한 이차전지를 보인 일부 단면도.1 is a partial cross-sectional view showing a secondary battery according to the present invention.
도 2는 본 발명의 의한 안전장치를 확대 도시한 분리 사시도.Figure 2 is an exploded perspective view showing an enlarged safety device of the present invention.
도 3은 본 발명에 의한 안전장치의 작동 상태도.Figure 3 is an operating state of the safety device according to the present invention.
도 4는 본 발명의 다른 예를 보인 이차전지의 일부 단면도.4 is a partial cross-sectional view of a secondary battery showing another example of the present invention.
도 5는 종래 공지된 이차전지를 보인 일부 단면도.5 is a partial cross-sectional view showing a conventionally known secondary battery.
* 도면의 주요 부분에 대한 부호의 설명 *Explanation of symbols on the main parts of the drawings
8-캡 어셈블리 10-캡 커버8-cap assembly 10-cap cover
12-전류제한기 14-안전밸브를 갖춘 플레이트12-current limiter 14-plate with safety valve
160-절연체 180-전류차단기160-insulator 180-current breaker
182-절연물 184-노치182-Insulator 184-Notch
이하, 본 발명을 실현하기 위한 바람직한 실시 예를 첨부 도면에 의거하여 보다 상세하게 설명한다.Hereinafter, preferred embodiments for realizing the present invention will be described in more detail with reference to the accompanying drawings.
도 1 및 도 2에서 자세하게 도시한 바와 같이, 본 발명은 이차전지의 일 예로서 나선형 구조를 갖는 리튬이온전지에 대하여 설명하고 있으며, 종래 기술의 도면에서 인용한 부분과 동일한 구성에 대하여는 설명의 명료성을 위해 동일 부호를 사용하기로 한다.As shown in detail in FIGS. 1 and 2, the present invention describes a lithium ion battery having a spiral structure as an example of a secondary battery, and clarity of description for the same configuration as that cited in the drawings of the prior art. For the sake of brevity, the same code is used.
도면에서와 같이 본 발명의 이차전지는 정극, 부극 및 세퍼레이터가 함께 권취된 전극부(2)를 액체 전해질과 함께 캔(4)의 내부로 수납하고, 그 캔(4)의 개구에 아래쪽으로부터 안전밸브를 갖춘 플레이트(14), 절연체(160) 및 캡 커버(10)를 순서대로 적층하여 캡 어셈블리(8)를 구성하고 있으며, 캔(4)의 개구를 크림핑 및 기타 방법에 의해 밀봉함으로써 어셈블리되고 있다.As shown in the drawing, the secondary battery of the present invention accommodates the electrode portion 2 in which the positive electrode, the negative electrode, and the separator are wound together, together with the liquid electrolyte, into the inside of the can 4, and is secured from the bottom of the can 4 to the opening. The plate assembly 14, the insulator 160, and the cap cover 10 with the valves are stacked in this order to form a cap assembly 8, and the assembly is formed by sealing the opening of the can 4 by crimping and other methods. It is becoming.
캡 어셈블리(8)는 절연체(160)와 구멍(10a)이 형성된 캡 커버(10)의 사이에 전류제한기(12)를 더 설치하여 구성할 수 있다.The cap assembly 8 may be configured by further installing a current limiter 12 between the insulator 160 and the cap cover 10 in which the holes 10a are formed.
이렇게 구성된 캡 어셈블리(8)에 있어서 안전밸브를 갖춘 플레이트(14)는 탭(20)을 이용하여 전극부(2)의 정극과 연결되고, 이어서 정극 단자인 캡 커버(10)로 연결되어야 하는 바, 이를 위하여 본 발명에서는 양 부품의 사이에 전류차단기(180)를 연결하고 있다.In the cap assembly 8 configured as described above, the plate 14 having the safety valve should be connected to the positive electrode of the electrode part 2 using the tab 20, and then to the cap cover 10, which is the positive electrode terminal. To this end, in the present invention, the current breaker 180 is connected between the two components.
보다 구체적으로 전류차단기(180)는 안전밸브를 갖춘 플레이트(14)와 절연체(160)의 사이로 일측 단부가 삽입되어서 면 접촉 혹은 용접되고, 또한 타측 단부가 절연체(160)와 전류제한기(12) 혹은 캡 커버(10)의 사이로 삽입되어서 면 접촉 혹은 용접되는 구조로 연결된다.More specifically, the current circuit breaker 180 is contacted or welded by inserting one end portion between the plate 14 having the safety valve and the insulator 160, and the other end of the current breaker 180 and the current limiter 12. Or it is inserted between the cap cover 10 is connected to the surface contact or welded structure.
이렇게 연결된 전류차단기(180)는 양단의 사이에 절연물(182)을 설치하여서 안전밸브를 갖춘 플레이트(14)의 가변부(14b)의 상승시 그 가변부와 접촉되도록 하므로, 전지의 내부 압력이 규정 압력 이상으로 상승할 경우 전단되어 전류를 차단한다. 즉, 전류차단기(180)는 도 3과 같이 전지 내압의 상승시 그 압력에 의해 위쪽으로 변형되는 안전밸브를 갖춘 플레이트(14)의 가변부(14b)에 의해 밀려 올려져 변형되면서 규정 압력 이상에서 전단되어, 안전밸브를 갖춘 플레이트(14)와 전류제한기(12) 혹은 캡 커버(10)의 사이로 흐르는 전류를 차단하게 된다.The current breaker 180 connected in this way is provided with an insulator 182 between both ends so that when the variable portion 14b of the plate 14 with the safety valve is raised, the current breaker 180 contacts with the variable portion. If it rises above the pressure, it shears and cuts off the current. That is, the current breaker 180 is pushed up and deformed by the variable part 14b of the plate 14 having the safety valve deformed upward by the pressure when the internal voltage of the battery rises as shown in FIG. It is sheared to block the current flowing between the plate 14 with the safety valve and the current limiter 12 or the cap cover 10.
이때 전류차단기(180)의 전단 강도는 절연물(182)을 관통 결합하기 위하여 형성한 구멍의 직경에 의하여, 또한 도 3과 같이 절연물(182)을 저면에 부착한 상태에서 양단의 사이에 형성하는 노치(184)에 의하여 결정될 수 있으며, 이것은 작동 압력에 따라 크거나 작게 조정할 수 있다.At this time, the shear strength of the current circuit breaker 180 is formed by the diameter of the hole formed to couple the insulator 182 through the notch formed between the both ends in the state in which the insulator 182 is attached to the bottom as shown in FIG. 184, which can be adjusted to be larger or smaller depending on the operating pressure.
또 본 발명의 안전장치는 안전밸브를 갖춘 플레이트(14)의 가변부(14b)의 변위를 조정하는 방법에 의해 그 작동 압력을 설정할 수 있는데, 이 경우에 가변부(14b)의 변위는 홈(14a) 및 안전밸브를 갖춘 플레이트(14) 재질의 두께에 의해 결정될 수 있다.In addition, the safety device of the present invention can set the operating pressure by a method of adjusting the displacement of the variable portion 14b of the plate 14 with the safety valve, in which case the displacement of the variable portion 14b is a groove ( 14a) and the thickness of the plate 14 material with safety valve.
이와 같은 구성에 따라 본 발명의 안전장치는 안전밸브를 갖춘 플레이트(14)의 가변부(14b)의 변위차와 전류차단기(180)의 전단 강도를 설계치에 맞도록 조정함에 의해 작동 압력을 정확하게 설정할 수 있다.According to such a configuration, the safety device of the present invention accurately sets the operating pressure by adjusting the displacement difference of the variable portion 14b of the plate 14 with the safety valve and the shear strength of the current breaker 180 to match the design value. Can be.
따라서 본 발명에 의한 이차전지는 비정상적인 작동으로 내부 압력이 규정 압력 이상으로 상승될 경우, 안전밸브를 갖춘 플레이트(14)의 가변부(14b)가 상승되고 그에 의해 전류차단기(180)가 전단되는 작용에 의해 1차적으로 전류를 차단할 수 있으며, 이후 안전밸브를 갖춘 플레이트(14)의 홈(14a)이 파단됨에 의해 2차적으로 전지의 내부 압력을 감소시킬 수 있는 것이다.Therefore, in the secondary battery according to the present invention, when the internal pressure rises above the prescribed pressure due to abnormal operation, the variable portion 14b of the plate 14 with the safety valve is raised and thereby the current breaker 180 is sheared. The current can be cut off primarily by, and the internal pressure of the battery can be reduced secondly by breaking the groove 14a of the plate 14 having the safety valve.
이상에서 설명한 구성 및 작용을 통하여 알 수 있듯이, 본 발명에 의한 이차전지의 안전장치는 안전밸브를 갖춘 플레이트와 캡 커버의 사이에 연결되는 전류차단기를 개선하여 종래 기술의 문제점을 실질적으로 해소하고 있다.As can be seen through the configuration and operation described above, the safety device of the secondary battery according to the present invention has substantially solved the problems of the prior art by improving the current breaker connected between the plate and the cap cover having a safety valve. .
즉 본 발명은 안전밸브를 갖춘 플레이트의 변위와 그 변위에 의해 전단되는 전류차단기의 상호 작용을 이용하여 안전장치의 작동 압력 및 시기를 정확하게 설정할 수 있다.That is, the present invention can accurately set the operating pressure and timing of the safety device by using the displacement of the plate with the safety valve and the interaction of the current breaker sheared by the displacement.
따라서 본 발명에 의한 이차전지는 전지의 내부 압력이 규정 압력 이상으로 상승할 경우 정확하게 작동되어서, 궁극적으로 전지의 비정상적인 작동 및 폭발에 대하여 안전성을 확보할 수 있다.Therefore, the secondary battery according to the present invention operates correctly when the internal pressure of the battery rises above the prescribed pressure, thereby ultimately ensuring safety against abnormal operation and explosion of the battery.
Claims (4)
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019980047936A KR100274897B1 (en) | 1998-11-10 | 1998-11-10 | The safety apparatus of secondary battery |
| JP11221313A JP2000149919A (en) | 1998-11-10 | 1999-08-04 | Battery safety device |
| CN99121937A CN1261728A (en) | 1998-11-10 | 1999-10-15 | Safety device for secondary battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019980047936A KR100274897B1 (en) | 1998-11-10 | 1998-11-10 | The safety apparatus of secondary battery |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| KR20000031742A KR20000031742A (en) | 2000-06-05 |
| KR100274897B1 true KR100274897B1 (en) | 2000-12-15 |
Family
ID=19557670
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR1019980047936A Expired - Fee Related KR100274897B1 (en) | 1998-11-10 | 1998-11-10 | The safety apparatus of secondary battery |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP2000149919A (en) |
| KR (1) | KR100274897B1 (en) |
| CN (1) | CN1261728A (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100373730B1 (en) * | 2000-09-18 | 2003-02-25 | 삼성에스디아이 주식회사 | Safety apparatus used in Secondary battery |
| CN100420087C (en) | 2003-06-23 | 2008-09-17 | 比亚迪股份有限公司 | Laminated lithium ion secondary battery |
| KR100627359B1 (en) * | 2004-09-24 | 2006-09-21 | 삼성에스디아이 주식회사 | Secondary battery, cap assembly and vent plate using the same |
| CN103151479B (en) * | 2013-01-31 | 2015-10-07 | 浙江努奥罗新能源科技有限公司 | A kind of colliery energy-storage battery and battery core thereof |
| US9711777B2 (en) * | 2013-02-27 | 2017-07-18 | Samsung Sdi Co., Ltd. | Rechargeable battery |
| WO2016157749A1 (en) * | 2015-03-27 | 2016-10-06 | 三洋電機株式会社 | Cylindrical battery |
-
1998
- 1998-11-10 KR KR1019980047936A patent/KR100274897B1/en not_active Expired - Fee Related
-
1999
- 1999-08-04 JP JP11221313A patent/JP2000149919A/en active Pending
- 1999-10-15 CN CN99121937A patent/CN1261728A/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| CN1261728A (en) | 2000-08-02 |
| KR20000031742A (en) | 2000-06-05 |
| JP2000149919A (en) | 2000-05-30 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP4464483B2 (en) | Secondary battery cap assembly and secondary battery current interrupter | |
| KR100484115B1 (en) | Secondary battery | |
| KR19990041760A (en) | Cap Assembly of Secondary Battery | |
| JPH0562664A (en) | Explosion-proof non-aqueous secondary battery | |
| KR19990041759A (en) | Cap Assembly of Secondary Battery | |
| CN105637678B (en) | Failure of current device and the electrical storage device for having used the failure of current device | |
| JPH08115714A (en) | Explosion-proof sealed battery | |
| KR100274897B1 (en) | The safety apparatus of secondary battery | |
| KR100274889B1 (en) | Cap assembly of square secondary battery | |
| KR100416096B1 (en) | Safety valve device and secondary battery applying such | |
| KR100515356B1 (en) | Secondary battery and method for fabricating safety valve thereof | |
| KR100346386B1 (en) | Safety apparatus used in secondary battery | |
| KR100346387B1 (en) | Safety apparatus used in secondary battery | |
| KR200283452Y1 (en) | Non-Aqueous Solution Secondary Battery | |
| KR100373730B1 (en) | Safety apparatus used in Secondary battery | |
| KR100509590B1 (en) | Cap assembley of secondary battery | |
| US20220320572A1 (en) | Secondary battery | |
| KR20000018606A (en) | Cap assembly of a secondary battery | |
| KR19990074762A (en) | Nonaqueous Electrolyte Battery | |
| KR100346385B1 (en) | Safety apparatus used in Secondary battery | |
| JP5790602B2 (en) | Secondary battery | |
| KR20000014670A (en) | Current breaking device of secondary battery | |
| JP2001216943A (en) | Sealing structure for sealed batteries and sealed batteries | |
| KR100528899B1 (en) | Cap assembly used in secondary battery | |
| KR20000042977A (en) | Safety apparatus of a secondary cell |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A201 | Request for examination | ||
| PA0109 | Patent application |
Patent event code: PA01091R01D Comment text: Patent Application Patent event date: 19981110 |
|
| PA0201 | Request for examination |
Patent event code: PA02012R01D Patent event date: 19981110 Comment text: Request for Examination of Application |
|
| PG1501 | Laying open of application | ||
| E701 | Decision to grant or registration of patent right | ||
| PE0701 | Decision of registration |
Patent event code: PE07011S01D Comment text: Decision to Grant Registration Patent event date: 20000822 |
|
| GRNT | Written decision to grant | ||
| PR0701 | Registration of establishment |
Comment text: Registration of Establishment Patent event date: 20000918 Patent event code: PR07011E01D |
|
| PR1002 | Payment of registration fee |
Payment date: 20000919 End annual number: 3 Start annual number: 1 |
|
| PG1601 | Publication of registration | ||
| LAPS | Lapse due to unpaid annual fee | ||
| PC1903 | Unpaid annual fee |