KR19980034916U - Explosion Proof of Lithium Battery - Google Patents

Explosion Proof of Lithium Battery Download PDF

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Publication number
KR19980034916U
KR19980034916U KR2019960047871U KR19960047871U KR19980034916U KR 19980034916 U KR19980034916 U KR 19980034916U KR 2019960047871 U KR2019960047871 U KR 2019960047871U KR 19960047871 U KR19960047871 U KR 19960047871U KR 19980034916 U KR19980034916 U KR 19980034916U
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South Korea
Prior art keywords
explosion
plate
exhaust hole
inner plate
lithium battery
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KR2019960047871U
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Korean (ko)
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김영호
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서두칠
대우전자부품 주식회사
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Priority to KR2019960047871U priority Critical patent/KR19980034916U/en
Publication of KR19980034916U publication Critical patent/KR19980034916U/en

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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
    • H01M50/394—Gas-pervious parts or elements
    • 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
    • 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 of a single cell or a single battery
    • H01M50/147—Lids or covers
    • H01M50/148—Lids or covers characterised by their shape
    • H01M50/152—Lids or covers characterised by their shape for cells 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 of a single cell or a single battery
    • 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
    • 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

Abstract

본 고안은 리튬전지의 폭발을 막는 장치에 관한 것으로, 배기공(12)이 구비된 내측판(16)과 이 내측판(16) 위에 부착된 배기막(10)으로 구성된 덮개판과 배기공이 구비된 단자판으로 구성된 리튬전지의 방폭장치에 있어서, 상기 내측판(16)에는 관통성형된 두 개 이상의 관통홀(15)이 구비되어진 것을 특징으로 하는 것으로, 종래의 전지 제조시 발생되던 양극 리드로 인한 배기공 막힘현상을 방지할 수 있어 불의의 폭발을 막을 수 있게 된다.The present invention relates to a device for preventing the explosion of a lithium battery, comprising a cover plate and the exhaust hole consisting of an inner plate 16 having an exhaust hole 12 and an exhaust film 10 attached to the inner plate 16. In the explosion-proof device of a lithium battery consisting of a terminal plate, characterized in that the inner plate 16 is provided with two or more through-holes 15 formed through, due to the positive electrode lead generated in the conventional battery manufacturing It is possible to prevent the clogging of the exhaust hole, thereby preventing an unexpected explosion.

Description

리튬전지의 방폭장치Explosion Proof of Lithium Battery

본 고안은 리튬전지의 폭발을 막는 장치에 관한 것으로, 특히 양극단자부에 전지내부와 통할 수 있는 배기공이 구비되고 이 배기공에 배기막(vent diaphram)을 두어 일정압력이상의 내압이 배기막에 가해지면 쉽게 파손될 수 있게 된 장치에 관한 것이다.The present invention relates to a device for preventing explosion of a lithium battery, and in particular, when the anode hole is provided with an exhaust hole that can communicate with the inside of the battery, and a vent diaphram is provided in the exhaust hole, a pressure higher than a predetermined pressure is applied to the exhaust film. It relates to a device that can be easily broken.

일반적으로 리튬전지는 양극활성물질로 리튬이온을 사용하는 전지를 말하는데, 이 리튬이온은 작은 이온 반지름을 가지기 때문에 고체상 속을 확산하기 쉬워 비프로톤성 고체전해질을 주로 사용하게 되며, 음극활성물질로 이산화망간 등을 사용한다. 이와 같은 양극활성물질, 음극활성물질, 전해질로 이루어진 전지본체는 반응생성물의 누출을 막고, 수분 등의 유입을 막기위해 밀봉시켜야 하기때문에 외부와의 차단이 중요시되는 한편, 전지내부를 밀봉시켰을 때 전지내의 전해질 또는 반응생성물의 기화에 의해 기체생성물이 발생되거나 내부로 유입된 수분 등이 내부물질과 반응하여 기체생성물이 발생되어 전지내압이 증가됨으로 인해 폭발할 위험성이 상존하게 된다. 따라서 리튬전지의 내부공간을 완전하게 밀폐시킬 수 있고, 일정내압 이상이면 폭발되지 않고 쉽게 내압을 줄일 수 있는 방안이 연구되어왔다.In general, a lithium battery refers to a battery that uses lithium ions as a positive electrode active material. Since lithium ions have a small ion radius, they easily diffuse in the solid phase, and mainly use aprotic solid electrolytes, and manganese dioxide as a negative electrode active material. Etc. Since the battery body made of such a positive electrode active material, negative electrode active material, and electrolyte must be sealed to prevent leakage of reaction products and to prevent inflow of moisture, it is important to block the outside and to seal the inside of the battery. The gaseous product is generated by the vaporization of the electrolyte or the reaction product therein, or the water introduced into the inside reacts with the internal material to generate a gaseous product, which increases the internal pressure of the battery. Therefore, a method of completely sealing the inner space of a lithium battery and reducing the breakdown pressure without explosion when a predetermined breakdown pressure has been studied has been studied.

이러한 연구의 결과로 등장한 것 중의 하나가 금속성 용기와 커버가 각각 음양 두 전극을 겸하는 것으로 폴리에틸렌 등의 전기 절연체로 봉함시키고, 이중 양극단자부인 커버에 도 3에 도시된 바와 같은, 방폭장치를 장치한 것이다.As a result of this research, one of the metallic containers and the cover, which serves as both positive and negative electrodes, is sealed with an electrical insulator such as polyethylene, and a double anode terminal cover is provided with an explosion-proof device as shown in FIG. will be.

상기 방폭장치는 원형판상의 배기막(10)과, 이 배기막(10)을 사이에 두고 배기공(12)이 중앙에 구비된 환형판(14)과 내측판(16)이 위치되어, 이 환형판(14)과 내측판(16)의 외주가 시밍(seaming)된 구조로 된 덮개판(18)과, 배기공(12)이 구비된 접시모양의 단자판(20), 상기 덮개판(18)과 단자판(20)의 사이의 기밀성을 높이기 위한 환형의 실링판(22)로 구성되어 있고, 이 방폭장치를 사용한 전지는 상기 방폭장치의 외주와 금속성용기 사이에 전기 절연 플라스틱을 두고 상기 금속성용기로 시밍하여 전지내부를 밀봉시킨 구조로 되어 있으며, 상기 덮개판(18)의 내측판(16)에 양극 리드(lead,24)가 연결되어 상기 단자판(20)을 양극으로 하고, 음극 리드가 연결된 금속성용기를 음극으로 하여 사용되게 된다.The explosion-proof device includes an annular plate 14 and an inner plate 16 having a circular plate-shaped exhaust film 10 and an exhaust hole 12 in the center with the exhaust film 10 interposed therebetween. A cover plate 18 having a structure in which outer circumferences of the plate 14 and the inner plate 16 are seamed, a plate-shaped terminal plate 20 provided with an exhaust hole 12, and the cover plate 18. And an annular sealing plate 22 for enhancing the airtightness between the terminal plate and the terminal plate 20. The battery using the explosion-proof device includes an electrically insulating plastic between the outer circumference of the explosion-proof device and the metallic container. A seam is sealed to the inside of the battery, and a positive lead 24 is connected to the inner plate 16 of the cover plate 18 so that the terminal plate 20 is a positive electrode, and the negative lead is metallic. The container is used as the cathode.

이러한 구조의 방폭장치는 일정내압으로 유지될 때에는 전지내부를 밀폐시킬 수 있고 일정압력이상이 될 때에는 배기공(12)의 배기막(10)이 파열되어 갑작스런 폭발이 일어나지 않게 된다.The explosion-proof device having such a structure can seal the inside of the battery when maintained at a constant internal pressure, and when the pressure exceeds the predetermined pressure, the exhaust film 10 of the exhaust hole 12 is ruptured so that a sudden explosion does not occur.

상기 양극 리드(24)는 얇고 긴 판상으로 일측단부는 상기 덮개판(18)의 내측판(16)에 용접되어 있고, 타측단부는 양극집전체와 연결되어 있는데, 제조상의 편의를 위해 완제품의 양극집전체와 내측판의 간격보다 길게 하여, 각 단부를 방폭장치의 내측판(16)과 양극집전체에 연결한 후, 방폭장치를 금속제용기에 밀어넣고 금속제용기의 상단부를 안쪽으로 오무려 압착하는 시밍을 하여 전지를 제조하게 된다. 이 결과의 완제품은 도 4에 도시된 바와 같이, 리드(24)가 구부러진 상태로 있게 된다.The anode lead 24 has a thin and long plate shape, one end of which is welded to the inner plate 16 of the cover plate 18, and the other end of which is connected to a positive electrode current collector. Each end is connected to the inner plate 16 of the explosion-proof device and the positive electrode current collector by making the gap between the current collector and the inner plate longer, and then the explosion-proof device is pushed into the metal container and the upper end of the metal container is pressed inwardly. Seaming is performed to manufacture the battery. The resulting finished product is in a state where the lead 24 is bent, as shown in FIG.

이때 리드(24)가 배기공(12)을 막아 방폭장치의 기능을 발휘할 수 없게 하여 급작스런 폭발이 일어날 수 있다는 문제점이 있었다.At this time, there is a problem that the lead 24 may block the exhaust hole 12 to prevent the function of the explosion-proof device, thereby causing a sudden explosion.

이에 본 고안은 상기한 문제점을 해결하기 위한 것으로, 제조과정중 일어날 수 있는 양극 리드로 인한 배기공 막힘현상이 일어나지 않는 방폭장치를 제공함에 그 목적이 있다.The present invention is to solve the above problems, and an object of the present invention is to provide an explosion-proof device that does not block the exhaust hole due to the anode lead that may occur during the manufacturing process.

상기한 목적을 달성하기 위한 본 고안의 방폭장치는,Explosion-proof device of the present invention for achieving the above object,

내측배기공이 구비된 내측판과 이 내측판 위에 부착된 배기막으로 구성된 덮개판과 외측배기공이 구비된 단자판으로 구성된 방폭장치에 있어서,In the explosion-proof device consisting of a cover plate consisting of an inner plate having an inner exhaust hole, an exhaust film attached to the inner plate and a terminal plate having an outer exhaust hole,

상기 내측판에는 관통성형된 두 개 이상의 관통홀이 구비되어진 것을 특징으로 하는 것이다.The inner plate is characterized in that the two or more through-holes are formed through.

상기 구조의 덮개판은 양극 리드가 구부러져 하나의 관통홀을 막는다 해도 다른 관통홀이 있기 때문에 폭발할 위험성은 없어지게 된다.In the cover plate of the structure, even if the anode lead is bent to block one through hole, there is no risk of explosion because there is another through hole.

도 1은 본 고안의 실시예에 따른 방폭장치 덮개판의 분리사시도,1 is an exploded perspective view of the explosion-proof cover plate according to an embodiment of the present invention,

도 2는 본 고안의 덮개판에 리드가 부착된 상태도,2 is a state in which the lid is attached to the cover plate of the present invention,

도 3은 종래의 방폭장치의 단면도,3 is a cross-sectional view of a conventional explosion-proof device,

도 4는 종래의 리드가 부착된 방폭장치의 사시도이다.Figure 4 is a perspective view of the explosion-proof device with a conventional lead.

*도면의 주요부분에 대한 부호의 설명** Description of the symbols for the main parts of the drawings *

10 : 배기막 12 : 배기공10: exhaust film 12: exhaust hole

14 : 환형판 15 : 관통홀14: annular plate 15: through hole

16 : 내측판 18 : 덮개판16: inner plate 18: cover plate

20 : 단자판 22 : 실링판20: terminal plate 22: sealing plate

24 : 리드24: lead

이하, 본 고안의 실시예를 첨부된 예시도면을 참조하여 상세히 설명한다.Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

본 고안의 방폭장치 덮개판의 일 실시예로서 도 1에 도시된 바와 같이, 원형판상의 배기막(10)과, 이 배기막(10)을 사이에 두고 배기공(12)이 중앙에 구비된 환형판(14)과 2개의 관통홀(15)이 구비된 내측판(16)이 위치되어, 이 환형판(14)과 내측판(16)의 외주가 시밍된 구조로 된 것을 들 수 있다.As one embodiment of the explosion-proof cover plate of the present invention, as shown in Figure 1, the circular plate of the exhaust film 10, and the exhaust hole 12 between the exhaust hole 12 is provided in the center annular The inner plate 16 provided with the plate 14 and the two through-holes 15 is located, and the outer periphery of the annular plate 14 and the inner plate 16 is seamed.

도 1에 도시된 2개의 관통홀(15)을 갖는 내측판(16)으로 전지를 제조했을 때의 상태는 도 2에 도시된 바와 같이, 상기 내측판(16)에 용접된 양극 리드(24)가 구부러져 있다. 이와 같이 상기 리드(24)로서 인위적으로 상기 내측판(16)의 관통홀(15)을 막으려 해도 막을 수 없게 된다.When the battery is manufactured from the inner plate 16 having the two through holes 15 shown in FIG. 1, the anode lead 24 welded to the inner plate 16 is shown in FIG. 2. Bent. In this way, even if the through hole 15 of the inner plate 16 is artificially blocked as the lead 24, it cannot be prevented.

따라서 두 개 이상의 관통홀(12)이 구비된 내측판(16)과 종래의 단자판으로 구성된 전지의 방폭장치는 상기 리드(24)로 인해 내측 배기공이 막혀 급작스럽게 폭발하는 현상이 발생되지 않게 되는 것이다.Therefore, the explosion-proof device of the battery composed of the inner plate 16 having two or more through holes 12 and the conventional terminal plate is such that the inner exhaust hole is blocked by the lid 24 so that a sudden explosion does not occur. .

이와같은 본 고안의 효과는 리튬전지의 양극 단자부인 방폭장치의 덮개판에 두 개 이상의 관통홀이 형성되어 있음으로 인해 종래의 전지 제조시 발생되던 양극 리드가 구부러지면서 덮개판 중앙의 배기공을 막는 현상을 방지할 수 있어 불의의 폭발을 막을 수 있게 한다.The effect of the present invention is that two or more through-holes are formed in the cover plate of the explosion-proof device, which is a positive terminal of a lithium battery, to prevent the exhaust hole in the center of the cover plate while bending the positive lead generated during the conventional battery manufacturing. The phenomenon can be prevented to prevent inadvertent explosions.

Claims (1)

배기공(12)이 구비된 내측판(16)과 이 내측판(16) 위에 부착된 배기막(10)으로 구성된 덮개판과 배기공이 구비된 단자판으로 구성된 리튬전지의 방폭장치에 있어서,In the explosion-proof device of a lithium battery comprising a cover plate composed of an inner plate 16 having an exhaust hole 12 and an exhaust film 10 attached to the inner plate 16 and a terminal plate having an exhaust hole, 상기 내측판(16)에는, 관통성형된 두 개 이상의 관통홀(15)이 구비되어진 것을 특징으로 하는 리튬전지의 방폭장치.The inner plate (16), explosion-proof device of a lithium battery, characterized in that the through-molded two or more through holes (15) are provided.
KR2019960047871U 1996-12-11 1996-12-11 Explosion Proof of Lithium Battery KR19980034916U (en)

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Application Number Priority Date Filing Date Title
KR2019960047871U KR19980034916U (en) 1996-12-11 1996-12-11 Explosion Proof of Lithium Battery

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KR2019960047871U KR19980034916U (en) 1996-12-11 1996-12-11 Explosion Proof of Lithium Battery

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