KR100352083B1 - Structure for sealing up of lithium ion battery - Google Patents
Structure for sealing up of lithium ion battery Download PDFInfo
- Publication number
- KR100352083B1 KR100352083B1 KR1019980040339A KR19980040339A KR100352083B1 KR 100352083 B1 KR100352083 B1 KR 100352083B1 KR 1019980040339 A KR1019980040339 A KR 1019980040339A KR 19980040339 A KR19980040339 A KR 19980040339A KR 100352083 B1 KR100352083 B1 KR 100352083B1
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- South Korea
- Prior art keywords
- hole
- battery
- electrolyte
- lithium ion
- ion battery
- Prior art date
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- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 title claims abstract description 19
- 229910001416 lithium ion Inorganic materials 0.000 title claims abstract description 19
- 238000007789 sealing Methods 0.000 title claims abstract description 17
- 239000003792 electrolyte Substances 0.000 claims abstract description 34
- 238000002347 injection Methods 0.000 claims abstract description 19
- 239000007924 injection Substances 0.000 claims abstract description 19
- 238000000034 method Methods 0.000 claims abstract description 17
- 230000001681 protective effect Effects 0.000 claims description 5
- 238000003466 welding Methods 0.000 claims description 3
- 239000000853 adhesive Substances 0.000 claims description 2
- 230000001070 adhesive effect Effects 0.000 claims description 2
- 238000004880 explosion Methods 0.000 abstract description 7
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 239000008151 electrolyte solution Substances 0.000 abstract 1
- 239000011521 glass Substances 0.000 description 3
- 230000001012 protector Effects 0.000 description 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 150000002641 lithium Chemical class 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 239000011572 manganese Substances 0.000 description 1
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 1
- 229910052753 mercury Inorganic materials 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 239000010959 steel 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
- H01M50/30—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
- H01M50/60—Arrangements or processes for filling or topping-up with liquids; Arrangements or processes for draining liquids from casings
- H01M50/609—Arrangements or processes for filling with liquid, e.g. electrolytes
- H01M50/627—Filling ports
- H01M50/636—Closing or sealing filling ports, e.g. using lids
-
- 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
-
- 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)
- Gas Exhaust Devices For Batteries (AREA)
- Filling, Topping-Up Batteries (AREA)
- Secondary Cells (AREA)
Abstract
본 발명은 리튬이온 전지의 밀봉구조에 관한 것이다.The present invention relates to a sealing structure of a lithium ion battery.
종래에는 전해액 주입구와 개스 방출을 위한 배기구멍이 각각 별도로 형성되어 제작 공정이 추가되고, 밀봉작업을 위해 전해액 주입구의 크기에 제한이 가해짐으로써 전해액 주입작업시 어려움이 있었다.In the related art, an electrolyte injection hole and an exhaust hole for gas discharge are formed separately, so that a manufacturing process is added, and the size of the electrolyte injection hole is added to the sealing operation, thereby making it difficult to inject the electrolyte solution.
본 발명은 각형 리튬이온 전지의 케이스 상부에 조립되어 그 내부를 밀폐하는 배터리 캡에 있어서, 배터리 캡의 일측에 관통구멍을 형성하고 이를 통해 케이스 내부로 전해액을 주입한 후, 관통구멍을 노치를 형성한 안전밸브로써 차단하여, 관통구멍이 전해액 주입구와 개스배출구의 기능을 겸할 수 있게 한 것을 특징으로 한다.The present invention provides a battery cap assembled to an upper part of a case of a rectangular lithium ion battery and sealing the inside thereof, and forming a through hole in one side of the battery cap and injecting electrolyte into the case through the notch. Shut off by one safety valve, the through-hole is characterized in that it can also function as the electrolyte inlet and the gas outlet.
이와 같은 본 발명에 의하면, 캡에 형성된 하나의 구멍을 통해 전해액 주입과 내압상승시 전지폭발을 방지하기 위한 개스배출구의 기능을 갖추게됨으로써, 전지 제조상의 공정단축 및 그에 따른 비용절감의 효과를 얻을 수 있으며, 관통구멍의 크기확대에 의해 전해액 주입을 용이하게 할 수 있는 장점이 있다.According to the present invention, by having a function of the gas outlet for preventing the battery explosion when the electrolyte injection and the internal pressure rises through a hole formed in the cap, it is possible to reduce the process of manufacturing the battery and the resulting cost savings And, there is an advantage that can facilitate the injection of the electrolyte by increasing the size of the through hole.
Description
본 발명은 리튬이온 이차전지(Lithium ion secondary battery)에 관한 것으로, 리튬이온 전지의 제조공정을 개선하고 비용절감을 실현할 수 있는 밀봉구조에 관한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lithium ion secondary battery, and more particularly, to a sealing structure capable of improving a manufacturing process of a lithium ion battery and reducing costs.
리튬이온 전지는 이동전화, 노트북 컴퓨터, 캠코더(Camcorder) 등 휴대형 전자제품의 전원공급장치에 이용되는 차세대 전지로서, 일반화된 망간전지 또는 수은전지에 비해 큰 용량을 지님으로써 이들 제품을 무게와 부피를 크게 줄일 수 있는 장점이 있다. 이러한 리튬이온 전지는 불안정한 상태에서의 사용 및 단락, 또는 역충전, 과충전 등에 의해 전지 내부에 발생되는 개스(Gas)의 내압상승에 의한 폭발의 위험을 가지고 있다. 따라서, 전지 내부가 일정한 압력에 도달되면 자동적으로 단락되게 하거나, 파손되어 전지 내부의 개스가 배출되게 함으로써 전지의 폭발을 방지할 수 있게 하는 안전장치(Safety device)를 구비하는 것이 일반적이다.Lithium-ion batteries are the next-generation batteries used in power supply devices for portable electronic products such as mobile phones, notebook computers, camcorders, etc., and have a larger capacity than general manganese batteries or mercury batteries. There is an advantage that can be greatly reduced. Such lithium ion batteries have a risk of explosion due to an increase in the pressure resistance of the gas (Gas) generated inside the battery due to use and short circuit in an unstable state, or reverse charging and overcharging. Therefore, it is common to provide a safety device that can prevent the battery from being exploded by causing a short circuit automatically when the inside of the battery reaches a constant pressure or by causing the gas inside the battery to be discharged.
도 1은 일반적인 각형 리튬이온 전지를 나타낸 것으로, 스테인레스(Stainless)나 알미늄(Aluminium) 또는 니켈도금강(NPS: Nickel plating steel) 등의 금속재질로 이루어진 케이스(1) 내에는 전원을 발생하는 전극체(2)가 내장되고, 그 상측에 절연재(5)가 삽입된 후 배터리 캡(6)이 조립되어 케이스(1)를 밀폐하는 구조로 되어있다. 전극체(2)는 금속 리드(Lead)판으로 이루어진 캐소드 탭(3)과 애노드 탭(4)을 각각 구비하여 배터리 캡(6)의 양극단자(7)에 캐소드 탭(3)이 연결되고, 애노드 탭(4)은 케이스(1) 내면에 접해짐으로써 케이스(1) 전체가 음극단자(陰極端子)를 이루게 된다.1 illustrates a general rectangular lithium ion battery, and an electrode body generating power in a case 1 made of a metal material such as stainless steel, aluminum, or nickel plating steel (NPS). (2) is built in, and the insulating material 5 is inserted in the upper side, and the battery cap 6 is assembled, and the case 1 is sealed. The electrode body 2 includes a cathode tab 3 and an anode tab 4 each made of a metal lead plate, and the cathode tab 3 is connected to the positive terminal 7 of the battery cap 6. The anode tab 4 is in contact with the inner surface of the case 1 so that the entire case 1 forms a negative electrode terminal.
배터리 캡(6) 중앙의 양극단자(7)는 글래스몰딩(8)을 통해 배터리 캡(6)과 절연됨과 동시에 기밀을 유지할 수 있도록 되어 있고, 인접된 일측에는 전해액을주입하기 위한 전해액 주입구(Filling hole: 9)가 형성되어 있어 이를 통해 전해액이 주입된 후 볼(Ball: 10)을 압입하여 밀봉시키고 있다.The positive electrode terminal 7 in the center of the battery cap 6 is insulated from the battery cap 6 through the glass molding 8 to maintain airtightness, and an electrolyte injection hole for injecting electrolyte to an adjacent side thereof. hole (9) is formed so that after the electrolyte is injected through the ball (Ball: 10) is sealed by pressing.
배터리 캡(6)에는 전지 내부의 압력과 온도가 상승하면 자동적으로 단락되어 반응이 더 이상 진행되지 않게하거나, 또는 전지 내부의 개스가 방출되게 함으로써 전지폭발의 위험을 방지하는 안전장치가 구비되는데, 도 2는 내압상승시 파손됨으로써 전지의 폭발위험을 방지할 수 있게 한 안전밸브(12)를 나타낸 것이다.The battery cap 6 is provided with a safety device to prevent the risk of battery explosion by automatically shorting when the pressure and the temperature inside the battery rises so that the reaction does not proceed any more, or the gas inside the battery is discharged. 2 shows a safety valve 12 that can be prevented when the internal pressure rises to prevent the explosion risk of the battery.
도 2를 보면, 배터리 캡(6)에 개스를 방출시키기 위한 배기구멍(11)이 형성되고, 노치(Notch: 13)가 형성된 금속재질의 안전밸브(12)를 이 배기구멍(11)의 내측에 부착하여 이를 차단하게 된다. 따라서, 밀폐된 케이스(1) 내부의 압력이 어느 정도까지 상승하면, 설정된 압력에서 파괴되도록 설계된 노치(13)부분이 파손됨으로써 이를 통해 개스가 배출되어 전지 내부의 압력을 떨어뜨리게 된다.2, an exhaust hole 11 for discharging gas is formed in the battery cap 6, and a metal safety valve 12 having a notch 13 is formed inside the exhaust hole 11. It will block it. Therefore, when the pressure inside the sealed case 1 rises to a certain degree, the part of the notch 13 designed to be broken at the set pressure is broken, thereby causing the gas to be discharged, thereby lowering the pressure inside the battery.
이러한 종래의 구조에서는 전해액 주입구(9)와 개스 방출을 위한 배기구멍(11)이 각각 별도로 형성되고, 전해액 주입구(9)의 밀봉작업을 위한 볼(10)을 필요로 하게 된다. 따라서, 부품과 공정이 추가되고, 밀봉작업을 위해 전해액 주입구(9)의 크기에 제한이 가해짐으로써 전해액 주입작업시 어려움이 있었다.In this conventional structure, the electrolyte inlet 9 and the exhaust hole 11 for gas discharge are formed separately, and the ball 10 for sealing the electrolyte inlet 9 is required. Therefore, parts and processes are added, and the size of the electrolyte injection hole 9 is added to the sealing operation, thereby causing difficulty in the electrolyte injection operation.
본 발명은 상술한 바와 같은 종래의 문제점을 해소하기 위한 것으로, 각각 별도로 형성되는 전해액 주입구와 개스배출구의 기능을 겸할 수 있게 하여 제조공정 단축 및 비용절감을 실현함과 아울러, 전해액 주입시 보다 빠르고 용이한 작업을 가능하게 한 리튬이온 전지의 밀봉구조를 제공하는 것을 목적으로 한다.The present invention is to solve the conventional problems as described above, it is possible to serve as a function of the electrolyte injection port and the gas discharge port formed separately, respectively, shortening the manufacturing process and cost reduction, and faster and easier when the electrolyte injection An object of the present invention is to provide a sealing structure of a lithium ion battery that enables one operation.
상술한 목적을 달성하기 위한 본 발명은, 각형 리튬이온 전지의 케이스 상부에 조립되어 그 내부를 밀폐하는 배터리 캡에 있어서, 배터리 캡의 일측에 관통구멍을 형성하고 이를 통해 케이스 내부로 전해액을 주입한 후, 관통구멍을 노치를 형성한 안전밸브로써 차단하여, 관통구멍이 전해액 주입구와 개스배출구의 기능을 겸할 수 있게 한 것을 특징으로 한다.The present invention for achieving the above object, in the battery cap is assembled on the upper case of the rectangular lithium-ion battery to seal the inside, forming a through hole in one side of the battery cap and injecting the electrolyte into the case through Thereafter, the through hole is cut off by a safety valve having a notch, so that the through hole can also function as an electrolyte injection port and a gas discharge port.
이러한 본 발명의 바람직한 실시예에 의하면, 관통구멍의 크기를 기존의 전해액 주입구보다 크게 형성함으로써 전해액 주입공정의 개선을 기대할 수 있다.According to the preferred embodiment of the present invention, it is possible to expect the improvement of the electrolyte injection process by forming the through hole larger than the conventional electrolyte injection hole.
또한, 관통구멍의 내측에 개스킷을 개재하고 원통형 보호구를 끼움으로써 전해액 주입구의 밀봉부분을 보호할 수 있으며, 이 경우 원통형 보호구의 상면에 안전밸브가 부착된다.In addition, the sealing portion of the electrolyte injection port can be protected by inserting a cylindrical protective device through a gasket inside the through hole, in which case a safety valve is attached to the upper surface of the cylindrical protective device.
이러한 본 발명에 의하면, 케이스를 밀폐하는 캡의 일측에 관통구멍이 형성되고 이를 통해 전해액이 주입된 후, 노치가 형성된 안전밸브로써 이 관통구멍이 차단된다. 따라서, 전지의 내압이 상승하여 일정한 압력에 도달되면, 안전밸브의 노치부가 파손되어 관통구멍을 통해 개스가 방출됨으로써 전지 내부의 압력을 감소시켜 전지폭발을 방지하게 된다.According to the present invention, after the through-hole is formed on one side of the cap sealing the case and the electrolyte is injected through this, the through-hole is blocked by the safety valve formed with a notch. Therefore, when the internal pressure of the battery rises to reach a constant pressure, the notch portion of the safety valve is broken and gas is discharged through the through hole, thereby reducing the pressure inside the battery to prevent the battery explosion.
도 1은 일반적인 각형 리튬이온 전지의 캡 구조를 나타낸 단면도,1 is a cross-sectional view showing a cap structure of a conventional rectangular lithium ion battery,
도 2는 종래의 리튬이온 전지에서 안전밸브가 설치된 캡을 나타낸 사시도,Figure 2 is a perspective view showing a cap installed a safety valve in a conventional lithium ion battery,
도 3은 본 발명에 따른 리튬전지의 밀봉구조를 나타낸 단면도,3 is a cross-sectional view showing a sealing structure of a lithium battery according to the present invention;
도 4, 도 5는 본 발명의 다른 실시예를 나타낸 단면도.4 and 5 are cross-sectional views showing another embodiment of the present invention.
<도면의 주요부분에 대한 부호의 설명><Description of the symbols for the main parts of the drawings>
100 ; 전극체 101 ; 캐소드 탭(Cathode tap)100; Electrode body 101; Cathode tap
102 ; 애노드 탭(Anode tap) 110 ; 케이스(Case)102; Anode tap 110; Case
120 ; 배터리 캡(Cap) 121 ; 양극단자(陽極端子)120; Battery cap 121; Anode terminal
122 ; 글래스몰딩(Glass mounlding) 123 ; 관통구멍122; Glass mounlding 123; Through hole
124 ; 개스킷(Gasket) 125 ; 원통형 보호구124; Gasket 125; Cylindrical protector
130 ; 안전밸브(Safety vent valve)130; Safety vent valve
이와 같은 본 발명의 특징적인 구성 및 이에 따른 작용효과는 후술하는 첨부된 도면을 참조한 실시예의 상세한 설명을 통해 더욱 명확해 질 것이다.Such a characteristic configuration and the effects thereof according to the present invention will be more clearly understood through detailed description of the embodiments with reference to the accompanying drawings.
본 발명에 따른 리튬이온 전지의 밀봉구조를 나타낸 도 3을 보면, 먼저 전원을 발생하는 전극체(100)가 내장된 케이스(110)는 상부에 조립된 캡(120)에 의해 내부가 밀폐되고, 캡(120)의 중앙에는 전극체(100)의 캐소드 탭(101)과 연결되는 양극단자(121)가 설치되어 글래스 몰딩(122)을 통해 캡(120)과 절연되는 구조로 되어있다. 또한, 전극체(100)의 애노드 탭(102)은 케이스(110) 내주면에 접지됨으로써 케이스(110)와, 이 케이스(110)에 용접으로 고정된 캡(120) 전체가 전지의 음극단자 기능을 하게 된다.3 shows a sealing structure of a lithium ion battery according to the present invention, first, the case 110 in which the electrode body 100 for generating power is embedded is sealed by an internal cap 120 assembled thereon. A positive electrode terminal 121 connected to the cathode tab 101 of the electrode body 100 is installed at the center of the cap 120 and is insulated from the cap 120 through the glass molding 122. In addition, since the anode tab 102 of the electrode body 100 is grounded on the inner circumferential surface of the case 110, the case 110 and the entire cap 120 fixed by welding to the case 110 function as a negative terminal of the battery. Done.
캡(120)의 일측에는 이를 상하로 관통하는 관통구멍(123)이 형성되고, 이 관통구멍(123)은 전해액을 주입하기 위한 전해액 주입구와 전지의 내압 상승시 내부의 개스를 방출시키기 위한 개스배출구의 기능을 갖는다. 따라서, 이 관통구멍(123)을 통해 전해액이 주입된 후, 노치(도시되지 않음)를 형성한 안전밸브(130)로써 이를 차단하게 된다.A through hole 123 penetrating the upper and lower sides of the cap 120 is formed, and the through hole 123 is an electrolyte injection hole for injecting electrolyte and a gas discharge hole for releasing the gas inside when the internal pressure of the battery rises. Has the function of. Therefore, after the electrolyte is injected through the through hole 123, it is blocked by the safety valve 130 having a notch (not shown).
기존에는 전해액 주입구(도 1참조)를 볼을 끼워 밀봉하게됨으로써 그 크기가 한정되어 전해액 주입시 많은 시간이 요구되고 작업도 까다로와지는 단점이 있었지만, 본 발명에 의하면 관통구멍(123)이 개스배출구의 기능을 겸하도록 안전밸브(130)로써 차단하게 되므로, 그 크기를 종래에 비하여 더 넓히는 것이 가능하다. 따라서, 관통구멍(123)의 크기는 전해액 주입시의 용이한 작업을 위해 0.2mm∼10mm 사이의 크기로 형성되는 것이 바람직하다.Conventionally, since the size of the electrolyte injection hole (see FIG. 1) is sealed by inserting a ball, the size of the electrolyte injection hole (see FIG. 1) is limited. Since it is blocked by the safety valve 130 to serve as the outlet, it is possible to widen the size compared to the conventional. Accordingly, the size of the through hole 123 is preferably formed to be between 0.2 mm and 10 mm in size for easy operation during electrolyte injection.
또한, 본 발명에서 관통구멍(123)을 밀봉하는 안전밸브(130)는 여러 가지 방법에 의해 설치될 수 있는데, 예를 들면 레이저용접(Laser welding)으로 부착하거나, 또는 접착제를 이용하는 것 등이다.In addition, in the present invention, the safety valve 130 for sealing the through hole 123 may be installed by various methods, for example, by attaching by laser welding or by using an adhesive.
도 4에서는 또 다른 방법으로써 관통구멍(123)의 상부 가장자리면을 따라 단차를 형성하고, 단차의 내경부분에 안전밸브(130)가 설치된 것을 나타내고 있다. 이와 같은 형태에서는 위에서 설명한 방법외에도 안전밸브(130)를 끼워맞춤 또는 압입 방법에 의해서도 설치가 가능하고, 안전밸브(130)가 캡(120)의 표면으로부터 돌출되지 않으므로, 외관을 미려하게 하는 효과가 있다.In FIG. 4, a step is formed along the upper edge surface of the through hole 123 as another method, and the safety valve 130 is installed at the inner diameter portion of the step. In this configuration, in addition to the above-described method, it is possible to install the safety valve 130 by fitting or press-fitting method, and since the safety valve 130 does not protrude from the surface of the cap 120, the effect of making the appearance beautiful have.
도 5를 보면, 관통구멍(123)의 내측에 개스킷(124)을 개재하고 원통형 보호구(125)를 끼움으로써 관통구멍(123)이 보호되게 하고 있는데, 여기서는 원통형 보호구(125)의 상면에 안전밸브(130)를 부착하거나, 또는 도 4에서와 같은 방법으로 원통형 보호구(125)의 중공부 내주면에 단차를 형성하고, 그 내측에 안전밸브(130)를 부착하여 관통구멍(123)을 차단한다.Referring to FIG. 5, the through hole 123 is protected by inserting the cylindrical protector 125 through the gasket 124 inside the through hole 123, where the safety valve is provided on the upper surface of the cylindrical protector 125. A step 130 is attached to the inner peripheral surface of the hollow part of the cylindrical protective part 125 by attaching the same method as in FIG. 4, and a safety valve 130 is attached to the inner side to block the through hole 123.
이러한 본 발명에 의하면, 캡(120)의 일측에 관통구멍(123)이 형성되고 이를 통해 전해액이 주입된 후, 노치를 형성한 안전밸브(130)로써 관통구멍(123)이 밀봉된다. 이때, 관통구멍(123)의 크기를 일반적인 크기보다 넓게함으로써 전해액 주입을 쉽고 빠르게 할 수 있다.According to the present invention, after the through hole 123 is formed on one side of the cap 120 and the electrolyte is injected through it, the through hole 123 is sealed by a safety valve 130 having a notch. At this time, by increasing the size of the through-hole 123 than the general size, the electrolyte can be injected easily and quickly.
전지가 불안정한 상태에서 사용되거나 단락, 또는 역충전, 과충전 등에 의해 전지 내부의 압력이 상승하여 일정한 압력에 도달하게 되면, 관통구멍(123)을 차단하고 있는 안전밸브(130)의 노치부분이 파열되면서 관통구멍(123)을 통해 내부의 개스가 방출됨으로써 내압상승에 따른 전지의 폭발위험을 방지할 수 있게 된다.When the battery is used in an unstable state or when the pressure inside the battery rises due to a short circuit, reverse charge, or overcharge, and reaches a constant pressure, the notch portion of the safety valve 130 blocking the through hole 123 is ruptured. Since the gas inside is discharged through the through hole 123, it is possible to prevent a risk of explosion of the battery due to the increase in the internal pressure.
위에서 설명한 바와 같이 본 발명에 의하면, 캡에 형성된 하나의 구멍을 통해 전해액 주입과 내압상승시 전지폭발을 방지하기 위한 개스배출구의 기능을 갖추게됨으로써, 전지 제조상의 공정단축 및 그에 따른 비용절감의 효과를 얻을 수 있으며, 관통구멍의 크기확대에 의해 전해액 주입을 용이하게 할 수 있는 장점이 있다.As described above, according to the present invention, by having a function of a gas outlet for preventing battery explosion during electrolyte injection and internal pressure increase through a hole formed in the cap, the process of manufacturing and reducing the cost of the battery It can be obtained, and there is an advantage that it is easy to inject the electrolyte by increasing the size of the through hole.
Claims (7)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019980040339A KR100352083B1 (en) | 1998-09-28 | 1998-09-28 | Structure for sealing up of lithium ion battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019980040339A KR100352083B1 (en) | 1998-09-28 | 1998-09-28 | Structure for sealing up of lithium ion battery |
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| Publication Number | Publication Date |
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| KR20000021323A KR20000021323A (en) | 2000-04-25 |
| KR100352083B1 true KR100352083B1 (en) | 2002-11-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| KR1019980040339A Expired - Fee Related KR100352083B1 (en) | 1998-09-28 | 1998-09-28 | Structure for sealing up of lithium ion battery |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8597824B2 (en) | 2005-12-29 | 2013-12-03 | Samsung Sdi Co., Ltd. | Lithium secondary battery |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100563029B1 (en) * | 1999-03-22 | 2006-03-24 | 삼성에스디아이 주식회사 | Secondary battery cap assembly and assembly method |
| KR100563034B1 (en) * | 1999-04-21 | 2006-03-24 | 삼성에스디아이 주식회사 | Cylindrical secondary battery |
| KR100560156B1 (en) * | 2000-09-27 | 2006-03-10 | 에스케이씨 주식회사 | Electrode and slim battery using the electrode |
| KR100399784B1 (en) * | 2001-04-04 | 2003-09-29 | 삼성에스디아이 주식회사 | Lithium secondary battery with safty zone and manufacturing method thereof |
| KR100627289B1 (en) * | 2004-11-09 | 2006-09-25 | 삼성에스디아이 주식회사 | Secondary Battery and Cap Assembly Used Thereof |
| KR100612390B1 (en) * | 2004-07-30 | 2006-08-16 | 삼성에스디아이 주식회사 | Cap assembly and secondary battery and battery module composed thereby |
| KR100591421B1 (en) | 2004-09-07 | 2006-06-21 | 삼성에스디아이 주식회사 | Lithium Ion Secondary Battery with Shape Memory Safety Vent |
| KR100614387B1 (en) * | 2005-02-28 | 2006-08-21 | 삼성에스디아이 주식회사 | Can type secondary battery with sealing holder |
| KR100719734B1 (en) * | 2005-12-28 | 2007-05-17 | 삼성에스디아이 주식회사 | Lithium Secondary Battery and Manufacturing Method Thereof |
| KR100824850B1 (en) | 2005-12-29 | 2008-04-23 | 삼성에스디아이 주식회사 | Vent Formation Method of Secondary Battery |
| KR101222228B1 (en) * | 2006-03-29 | 2013-01-15 | 삼성에스디아이 주식회사 | Lithium rechargeable battery and Method of making the same |
-
1998
- 1998-09-28 KR KR1019980040339A patent/KR100352083B1/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8597824B2 (en) | 2005-12-29 | 2013-12-03 | Samsung Sdi Co., Ltd. | Lithium secondary battery |
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