KR100381917B1 - Electrical device with 3-layer conducting compounds - Google Patents

Electrical device with 3-layer conducting compounds Download PDF

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KR100381917B1
KR100381917B1 KR10-2001-0007920A KR20010007920A KR100381917B1 KR 100381917 B1 KR100381917 B1 KR 100381917B1 KR 20010007920 A KR20010007920 A KR 20010007920A KR 100381917 B1 KR100381917 B1 KR 100381917B1
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conductive composite
conductive
metal electrode
overcurrent
composite
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KR20020067385A (en
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한준구
최수안
김도윤
고창모
이종호
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엘지전선 주식회사
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    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01CRESISTORS
    • H01C7/00Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material
    • H01C7/18Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material comprising a plurality of layers stacked between terminals
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01CRESISTORS
    • H01C1/00Details
    • H01C1/14Terminals or tapping points or electrodes specially adapted for resistors; Arrangements of terminals or tapping points or electrodes on resistors
    • H01C1/1406Terminals or electrodes formed on resistive elements having positive temperature coefficient
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01CRESISTORS
    • H01C17/00Apparatus or processes specially adapted for manufacturing resistors
    • H01C17/06Apparatus or processes specially adapted for manufacturing resistors adapted for coating resistive material on a base
    • H01C17/065Apparatus or processes specially adapted for manufacturing resistors adapted for coating resistive material on a base by thick film techniques, e.g. serigraphy
    • H01C17/06506Precursor compositions therefor, e.g. pastes, inks, glass frits
    • H01C17/06513Precursor compositions therefor, e.g. pastes, inks, glass frits characterised by the resistive component
    • H01C17/0652Precursor compositions therefor, e.g. pastes, inks, glass frits characterised by the resistive component containing carbon or carbides

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  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Manufacturing & Machinery (AREA)
  • Thermistors And Varistors (AREA)

Abstract

본 발명은 전도성 복합체를 함유한 전기소자에 관한 것으로, 상세하게는 PTC 특성을 나타내는 두 종류의 전도성 복합체를 미세거침이 없는 금속전극과의 접합을 위해 접합력이 좋은 전도성 복합체를 윗면과 아랫면에 접합시킨 3층 전도성 복합체를 함유한 전기소자에 관한 것이다.The present invention relates to an electrical device containing a conductive composite, and in particular, the two types of conductive composites exhibiting PTC characteristics are bonded to the upper and lower surfaces of the conductive composite having a good bonding strength for bonding to a metal electrode without fine roughness. An electrical device containing a three-layer conductive composite.

본 발명은 두종류의 전도성 복합체와 금속전극을 다층으로 접합시켜 종래의 과전류를 차단하는 전도성 복합체로 구성된 PTC 소자의 기능을 유지하는 3층 전도성 복합체를 함유한 전기 소자이다.The present invention is an electrical device containing a three-layer conductive composite that maintains the function of the PTC device composed of a conductive composite that blocks two types of conductive composite and a metal electrode in a multilayer to block the conventional overcurrent.

본 발명은 제 1전도성 복합체의 위, 아랫면에 제 2전도성 복합체를 접합시키고, 다시 제 2전도성 복합체의 위, 아랫면에 금속전극을 접합시켜서, 두 단계로 과전류로 인한 온도의 상승시에 설정온도에서 동작하는 것으로 제 2전도성 복합체는 제 1전도성 복합체와 금속전극의 접합을 위해 사용되며, 두종류의 전도성 복합체를 다층으로 구성하여 전도성 복합체를 함유한 PTC 소자의 특성은 유지하면서 두단계로 과전류를 차단한다.According to the present invention, the second conductive composite is bonded to the upper and lower surfaces of the first conductive composite, and the metal electrode is bonded to the upper and lower surfaces of the second conductive composite, thereby operating at a set temperature when the temperature rises due to overcurrent in two steps. The second conductive composite is used for joining the first conductive composite to the metal electrode, and the two types of conductive composites are formed in multiple layers to block overcurrent in two steps while maintaining the properties of the PTC device containing the conductive composite. .

Description

3층 전도성 복합체를 함유한 전기소자{Electrical device with 3-layer conducting compounds}Electrical device with 3-layer conducting compounds

본 발명은 전도성 복합체를 함유한 전기소자에 관한 것으로 특히 PTC 특성을 나타내는 두 종류의 전도성 복합체를 미세거침이 없는 금속전극과의 접합을 위해 접합력이 좋은 전도성 복합체를 윗면과 아랫면에 접합시킨 3층 전도성 복합체를 함유한 전기소자에 관한 것이다.The present invention relates to an electrical device containing a conductive composite, and in particular, a three-layered conductive material in which two types of conductive composites exhibiting PTC characteristics are bonded to a top surface and a bottom surface of a conductive composite having good bonding strength for bonding to a metal electrode without fine roughness. It relates to an electric device containing a composite.

일반적으로, PTC(Positive Temperature Coefficient)란 온도가 증가함에 따라 전기저항이 커지는 현상이다. 상온의 낮은 온도에서는 낮은 저항으로 전도성 성질을 나타내지만, 과전류가 발생하여 온도가 증가하면 저항이 급격히 커짐으로써 전류를 차단하여 소자를 보호하게 된다.In general, PTC (Positive Temperature Coefficient) is a phenomenon in which the electrical resistance increases as the temperature increases. At low temperature of room temperature, low resistance shows conductive property, but when overcurrent occurs and the temperature increases, the resistance is rapidly increased to block the current to protect the device.

PTC 특성을 갖는 전도성 복합체는 이미 오래 전부터 공지되었으며, 정온 전선, 과전류 차단용 전기장치, 열 센서, 과전류 레귤레이터 및 저전력 보호회로, 배터리, 회로 보호 소자, 가열기 등에 적용되고 있다.BACKGROUND OF THE INVENTION Conductive composites having PTC properties have been known for a long time, and are applied to constant temperature wires, electric devices for overcurrent blocking, thermal sensors, overcurrent regulators and low power protection circuits, batteries, circuit protection devices, heaters, and the like.

또한, PTC 소자를 함유하는 전기장치는 과전류 부하로부터 보호될 회로와 직렬로 연결되어 정상 작동 시에는 낮은 저항을 유지하여 전력손실이 작은 범위에서 전류를 통과시키지만 과전류 부하가 인가되면 전기장치의 온도상승에 따른 전도성 복합체의 부피변화와 이에 따른 저항이 상승하여 보호될 회로의 과전류를 차단하는 성능을 가진다.In addition, an electric device containing a PTC element is connected in series with a circuit to be protected from an overcurrent load to maintain a low resistance during normal operation to allow a current to pass through a range of low power loss, but when the overcurrent load is applied, the temperature of the electric device is increased. As a result, the volume change of the conductive composite and the resistance thereof increase to block the overcurrent of the circuit to be protected.

PTC 소자를 사용하는 전기장치는 정상전류가 흐를 때에는 상온의 저항이 낮게 유지되어 전력 손실을 최소화하는 것이 바람직하며, 과전류의 인가 시에는 PTC 전기 소자를 구성하는 전도성 복합체가 녹는점 이상으로 온도의 상승 하강과 저항 상승의 반복적인 동작 후에도 초기의 낮은 저항을 유지하는 것이 중요한 특성이다.In the electric device using the PTC element, it is desirable to minimize the power loss by keeping the resistance at room temperature low when a steady current flows, and when the overcurrent is applied, the temperature rises above the melting point of the conductive composite constituting the PTC electric element. Maintaining the initial low resistance even after repeated actions of falling and rising resistance is an important characteristic.

PTC 전기 소자를 구성하는 전도성 복합체는 결정성 복합체나 적어도 하나의 결정성 복합체를 포함하며 여기에 분산되어 있는 입상 전도성 충진제로 이루어진다. 입상 전도성 충진제는 카본 블랙, 카본 섬유, 니켈입자, 흑연 및 금속 플레이크 등이 있으며 전도성 충진제를 함유한 전도성 복합체를 열에너지나 방사선 등에의해서 가교결합 시켜 열 안정성 및 저항률을 증가시킨다.The conductive composite constituting the PTC electrical element comprises a crystalline composite or at least one crystalline composite and consists of a particulate conductive filler dispersed therein. Granular conductive fillers include carbon black, carbon fiber, nickel particles, graphite and metal flakes, and increase the thermal stability and resistivity by crosslinking the conductive composite containing the conductive filler by thermal energy or radiation.

전도성 복합체는 상온과 같은 낮은 온도에서는 전도성을 가지지만 온도의 상승에 따른 용융점 부근에서는 고분자 결정이 와해되면서 부피 팽창이 전도성 충진제간의 이격을 조장하여 저항이 증가하는 PTC 특성을 갖는다. 이러한 물질이 다시 상온 상태로 돌아오게 되면 낮은 상온 저항 상태를 회복하지만, 반복으로 인한 용융점이 오래 지속되거나 더 높은 온도로 올라가게 되면 전도성 충진제의 브라운 운동 및 반데르 발스 힘에 의한 재응집으로 저항이 감소하는 NTC(Negative Temperature Coefficient) 현상이 발생한다. 이러한 현상은 과전류가 인가된 상태에서 계속 높은 저항을 유지함으로써 과전류를 차단하는 회로 보호용 전기 장치에서는 치명적인 결과를 가져오는 문제점이 있다.The conductive composite has conductivity at low temperatures, such as room temperature, but has a PTC characteristic of increasing resistance by increasing the separation between the conductive fillers as the volume of the polymer crystals disintegrates near the melting point as the temperature increases. When these materials return to room temperature, they return to a low room temperature resistance state, but if the melting point due to repetition lasts longer or rises to a higher temperature, the resistance will be reduced due to brown motion of the conductive filler and reagglomeration by van der Waals forces. A decreasing NTC (Negative Temperature Coefficient) phenomenon occurs. This phenomenon is a fatal problem in the circuit protection electrical device that cuts off the overcurrent by maintaining a high resistance while the overcurrent is applied.

도 1은 종래의 PTC 특성을 갖는 전기 소자의 단면도로, 금속전극(12)과 PTC 특성을 나타내는 전도성 복합체(11)로 이루어진 PTC 전기 소자를 도시한 것이다.1 is a cross-sectional view of a conventional electric device having PTC characteristics, showing a PTC electric device composed of a metal electrode 12 and a conductive composite 11 exhibiting PTC properties.

PTC 특성을 나타내는 소자를 함유하는 전기소자는 과전류로부터 보호될 회로와 직렬로 연결되어 정상 작동 시에는 낮은 저항을 유지하여 전력 손실이 작은 범위에서 전류를 통과시키지만 과전류 부하가 인가되면 전기장치의 온도 상승에 따른 전도성 복합체(11)의 부피변화와 이에 따른 저항이 상승하여 보호될 회로의 과전류를 차단하는 것이다.Electrical devices containing elements exhibiting PTC characteristics are connected in series with circuits to be protected from overcurrent and maintain a low resistance during normal operation to allow current to pass through a range of low power losses, but when the overcurrent load is applied, the temperature of the electrical device rises. By changing the volume of the conductive composite 11 and the resulting resistance is to block the overcurrent of the circuit to be protected.

종래의 PTC 소자를 함유한 전기소자는 설정한 작동 온도에서 한단계로 과전류를 차단하는 것으로, 과전류로 인하여 온도가 상승 시에 설정된 작동 온도에서 저항을 증가시켜 과전류를 차단하지만, 계속적으로 전기장치의 가동 중에 설정된작동 온도 이상으로 전기장치의 온도가 상승 시에는 과전류를 차단할 수 없어서 과부하로 인한 전기회로의 고장 등이 발생하는 문제점이 있다.The electric element containing the conventional PTC element cuts off the overcurrent in one step at the set operating temperature, and it blocks the overcurrent by increasing the resistance at the set operating temperature when the temperature rises due to the overcurrent, but continuously operates the electric device. When the temperature of the electric device rises above the set operating temperature, there is a problem in that an overcurrent cannot be interrupted and a failure of an electric circuit due to an overload occurs.

한편, 종래의 PTC 특성을 나타내는 전도성 복합체를 함유하는 전기소자의 경우 전도성 복합체와 금속전극의 접합을 위하여 미국특허 5089801, 5582770, 5874885, 4689475를 참조하여 설명하면 다음과 같다.On the other hand, in the case of an electric device containing a conductive composite exhibiting the conventional PTC characteristics, it will be described with reference to US Patent 5089801, 5582770, 5874885, 4689475 for the bonding of the conductive composite and the metal electrode.

전도성 복합체와 금속전극 사이에 도전성 접착제를 사용한 접착 방법은 도전성 접착제의 경우 접착제의 도포 부위가 전도성 복합체보다 작으며, 도전성 접착제의 잉여분을 없애기 위해 금속전극에 구멍이 필요하며, 도전성 접착제의 경우에 용도는 단순한 접착이다.The adhesive method using the conductive adhesive between the conductive composite and the metal electrode has a smaller application area than the conductive composite in the case of the conductive adhesive, requires a hole in the metal electrode to remove the excess of the conductive adhesive, and is used in the case of the conductive adhesive. Is a simple bond.

또한, 금속전극과 접합력이 좋은 EAA나 EBA 같은 코폴리머(copolymer)를 포함한 전도성 복합체와의 직접 접합방법은 PTC 특성의 전도성 고분자 자체에 접합 특성을 부여하기 위해 코폴리머를 첨가해서 만들며, 코폴리머를 첨가할 때 150℃에서의 저항이 낮아져서 PTC 특성을 나타내는 소자에는 문제점이 된다.In addition, the direct bonding method with a metal electrode and a conductive composite including a copolymer such as EAA or EBA, which has good bonding strength, is made by adding a copolymer to impart bonding properties to the conductive polymer having PTC properties. When added, the resistance at 150 ° C. is lowered, which is a problem for devices exhibiting PTC characteristics.

또한, 물리적 접착력을 좋게 하기 위하여 전극표면을 인위적으로 전기 도금 방법 등을 이용하여 만든 미세거침이 있는 금속전극을 이용한 물리적인 접합방법은, 미세거침이 있는 금속전극의 경우 중심선 평균조도 Ra가 1.6이상이며, 반사밀도 Rd가 0.81이상인 표면층을 요구하는 문제점이 있다.In addition, in order to improve the physical adhesion, the physical bonding method using the metal electrode with microroughness artificially made the electrode surface by using electroplating method, etc., in the case of the metal electrode with microroughness, the center line average roughness Ra is 1.6 or more. This is a problem of requiring a surface layer having a reflection density Rd of 0.81 or more.

본 발명은 상술한 바와 같은 문제점을 해결하기 위한 것으로, 두종류의 전도성 복합체와 금속전극을 다층으로 접합시켜 종래의 과전류를 차단하는 전도성 복합체로 구성된 PTC 소자의 기능을 유지하는 3층 전도성 복합체를 함유한 전기 소자를 그 목적으로 한다.The present invention is to solve the problems described above, it contains a three-layer conductive composite to maintain the function of the PTC device consisting of a conductive composite that blocks the conventional overcurrent by joining the two types of conductive composite and the metal electrode in a multi-layer One electrical element is for that purpose.

또한, 제 1전도성 복합체의 위, 아랫면에 제 2전도성 복합체를 접합하고, 제 2전도성 복합체의 위, 아래면에 Ra=1.3 이하인 니켈 전극으로 구성된 금속전극을 접합하는 3층 전도성 복합체를 함유한 전기 소자를 그 목적으로 한다.In addition, the second conductive composite is bonded to the upper and lower surfaces of the first conductive composite, the upper and lower surfaces of the second conductive composite containing a three-layer conductive composite containing a metal electrode consisting of a nickel electrode of Ra = 1.3 or less An element is made into the objective.

도 1은 종래의 PTC 특성을 갖는 전기 소자의 단면을 도시한 도면.1 is a cross-sectional view of an electrical device having conventional PTC characteristics.

도 2는 본 발명의 3층 전도성 복합체를 함유한 전기소자를 도시한 도면.2 is a view showing an electric element containing the three-layer conductive composite of the present invention.

<도면의 주요 부분에 대한 설명>Description of the main parts of the drawing

11 : 전도성 복합체, 12, 23 : 금속 전극,11: conductive composite, 12, 23: metal electrode,

21 : 제 1전도성 복합체, 22 : 제 2전도성 복합체.21: first conductive complex, 22: second conductive complex.

상술한 바와 같은 목적을 달성하기 위한 본 발명의 특징은, 3층의 전도성 복합체와 금속전극으로 구성된 전기소자에 있어서, 가운데에 제 1전도성 복합체가 위치하고, 상기 제 1전도성 복합체의 아래, 윗면에 제 2전도성 복합체가 접합되고 상기 제 2전도성 복합체의 위 아래면에 미세거침이 없는 금속전극을 접합하는 것을 특징으로 한다.A feature of the present invention for achieving the object as described above, in the electrical device consisting of a three-layer conductive composite and a metal electrode, the first conductive composite is located in the center, the first conductive composite is located on the bottom, the upper surface A biconductive composite is bonded to the upper and lower surfaces of the second conductive composite, characterized in that for bonding the metal electrode without fine roughness.

또한, 본 발명의 제 1전도성 복합체는 PTC 특성을 나타내며, 상기 제 2전도성 복합체는 상기 금속전극과 상기 제 1전도성 복합체를 접합시키며 PTC 특성을 가지는 것을 특징으로 한다.In addition, the first conductive composite of the present invention exhibits a PTC characteristic, and the second conductive composite is characterized by bonding the metal electrode and the first conductive composite and having a PTC characteristic.

이하, 본 발명에 따른 실시 예를 첨부한 도면을 참조하여 상세히 설명하면 다음과 같다.Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

도 2는 본 발명의 두종류의 전도성 복합체와 미세거침이 없는 금속전극을 3층으로 접합한 전기소자를 도시한 것이다.FIG. 2 illustrates an electric device in which two kinds of conductive composites of the present invention and a metal electrode without fine roughness are bonded in three layers.

구성은 제 1전도성 복합체(21), 금속전극(23), 제 2전도성 복합체(22)로 이루어진다. 3층 전도성 복합체로 구성되는 전기소자의 크기는 가로, 세로 1~20mm 이내이며, 두께는 0.2mm~1mm사이이며, 제 2전도성 복합체(22)의 두께는 15~50㎛ 이다.The configuration is composed of a first conductive composite 21, a metal electrode 23, and a second conductive composite 22. The size of the electrical element composed of the three-layer conductive composite is less than 1 ~ 20mm in width, length, the thickness is between 0.2mm ~ 1mm, the thickness of the second conductive composite 22 is 15 ~ 50㎛.

가운데에 제 1전도성 복합체(21)가 위치하고 제 1전도성 복합체(21)의 윗면과 아랫면에 제 2전도성 복합체(22)가 접합되며, 제 2전도성 복합체(22)의 위 아래면에 금속전극(23)이 접합되는 구조로 이루어진다.The first conductive composite 21 is positioned in the center, and the second conductive composite 22 is bonded to the upper and lower surfaces of the first conductive composite 21, and the metal electrode 23 is disposed on the upper and lower surfaces of the second conductive composite 22. ) Is made of a bonded structure.

제 1전도성 복합체(21)는 고밀도 폴리에틸렌(high density polyethylene)과 카본 블랙으로 구성되며 과산화물 가교를 한다. 고밀도 폴리에틸렌(HDPE)은 밀도가 0.95~0.965 g/cm3이고, 용융지수는 3~6이며, 카본블랙은 전도성 복합체의 30~40wt%를 차지하며, 과산화물 가교제는 0.2wt%이다. 두께는 전체 전도성 복합체에서 70~90%를 차지한다. 한편, 제 1전도성 복합체(21)는 PTC 특성을 나타낸다.The first conductive composite 21 is composed of high density polyethylene and carbon black and crosslinks with peroxide. High density polyethylene (HDPE) has a density of 0.95 to 0.965 g / cm 3 , a melt index of 3 to 6, carbon black accounts for 30 to 40 wt% of the conductive composite, and a peroxide crosslinking agent is 0.2 wt%. The thickness accounts for 70-90% of the total conductive composite. On the other hand, the first conductive composite 21 exhibits PTC characteristics.

제 2전도성 복합체(22)는 제 1전도성 복합체(21)와 금속전극(23)을 접합시키기며, 무수 말레인 화합물로 변성된 저밀도 폴리에틸렌 (low density polyethylene) 또는 무수 말레인 화합물로 변성된 고밀도 폴리에틸렌과 카본 블랙으로 이루어진다. 저밀도 폴리에틸렌(LDPE) 또는 고밀도 폴리에틸렌(HDPE)의 용융지수는 3~6이며, 무수 말레인 화합물의 첨가량은 0.1~1wt%이며, 카본블랙은 전도성 복합체의 30~40wt%를 차지하며, 단일층의 두께는 총 전도성 복합체의 5~15%를 차지하며, 제 2전도성 복합체(22)도 PTC 특성을 나타낸다.The second conductive composite 22 bonds the first conductive composite 21 to the metal electrode 23 and is made of low density polyethylene modified with anhydrous malee compound or high density polyethylene modified with anhydrous malee compound. And carbon black. The melt index of low density polyethylene (LDPE) or high density polyethylene (HDPE) is 3-6, the addition amount of anhydrous maleic compound is 0.1-1 wt%, carbon black accounts for 30-40 wt% of the conductive composite, The thickness accounts for 5-15% of the total conductive composite, and the second conductive composite 22 also exhibits PTC properties.

금속전극(23)은 미세거침이 없어서 물리적 접합이 요구되지 않는다. 일반적인 도금박은 Ra는 0.6정도이며, 본 발명에서는 Ra는 1.3 이하의 니켈전극, 니켈 도금박, 니켈 압연박, 구리 도금박에 전해 또는 무전해 도금을 한 박막으로 금속전극(23)을 구성한다.The metal electrode 23 has no fine roughness, and thus no physical bonding is required. In general plating foil, Ra is about 0.6, and in the present invention, Ra constitutes the metal electrode 23 by a thin film of electrolytic or electroless plating on a nickel electrode, nickel plated foil, nickel rolled foil, copper plated foil of 1.3 or less.

HDPE 용융지수HDPE Melt Index 카본블랙 wt%Carbon black wt% 과산화물 가교제 wt%Peroxide Crosslinker wt% Resistivity ohm cmResistivity ohm cm AA 0.10.1 3535 0.20.2 99 BB 33 3535 0.20.2 66 CC 33 2525 0.20.2 1515 DD 55 3535 0.20.2 44 EE 55 2525 0.20.2 1111 FF 77 3535 0.20.2 44

표 1은 제 1전도성 복합체(21)를 구성하는 고밀도 폴리에틸렌(HDPE)의 용융지수와 카본블랙의 함유량과, 과산화물 가교제를 변화시키면서 저항(resistivity)을 측정한 것이다.Table 1 measures the resistivity of the high-density polyethylene (HDPE) constituting the first conductive composite 21 and changes the content of the carbon black and the peroxide crosslinking agent.

무수말레인 화합물의 첨가량Amount of Maleic Anhydride Compound 카본블랙 wt%Carbon black wt% Resistivity ohm cmResistivity ohm cm Peel strengthPeel strength AA 0.0010.001 3535 44 불량Bad BB 0.10.1 3535 55 양호Good CC 0.10.1 2525 1111 양호Good DD 1One 3535 55 양호Good EE 55 3535 1010 양호Good

표 2는 제 2전도성 복합체(22)를 구성하는 무수말레인 화합물의 첨가량을 변화하며, 카본블랙의 함유량과 저항(resistivity)의 변화에 따른 강도(peel strength)를 측정한 것이다.Table 2 changes the addition amount of the maleic anhydride compound constituting the second conductive composite 22, and measures the strength according to the change of carbon black content and resistance.

표 2에서 A는 무수말레인 화합물의 첨가량이 0.001이며, 카본블랙이 35 wt%이고, 저항(resistivity)은 4 ohm cm 일 때의 강도(peel strength)는 불량하며, B, C, D, E의 경우에는 모두 양호한 결과를 보였다.In Table 2, A is an amount of anhydrous maleic acid compound is 0.001, carbon black is 35 wt%, the resistance (resistivity) 4 ohm cm (peel strength) is poor, B, C, D, E In the case of both showed good results.

본 발명에 따른 3층 전도성 복합체를 함유한 전기소자의 동작은, 연결되어 사용하는 전기장치가 동작중에 여러 이유로 과전류가 발생하게 되면 PTC 특성을 나타내는 제 2전도성 복합체(22)는 차단 온도에서 저항을 증가시켜 과전류를 차단하며, 동작하는 전기장치의 부하가 더 증가하여 과전류로 온도가 제 2전도성 복합체(22)의 차단온도 이상으로 증가하여 제 1전도성 복합체(21)가 차단하는 온도에 이르면 전류를 차단시켜 두 단계로 과전류를 차단시켜 회로를 보호하는 것으로, 제 2전도성 복합체(22)는 주로 접합을 위해 사용되며, 제 1전도성 복합체(21)가 과전류로 인한 온도의 상승시에 전류를 차단한다.The operation of the electric element containing the three-layer conductive composite according to the present invention, the second conductive composite 22 exhibiting a PTC characteristic when the overcurrent occurs for a variety of reasons during the operation of the connected electrical device is a resistance at a blocking temperature The overcurrent is cut off, and the load of the operating electrical device is further increased so that the current increases when the temperature increases above the cutoff temperature of the second conductive composite 22 due to the overcurrent to reach a temperature blocked by the first conductive composite 21. By blocking the overcurrent in two stages to protect the circuit, the second conductive composite 22 is mainly used for bonding, and the first conductive composite 21 blocks the current when the temperature rises due to the overcurrent.

상술한 바와 같이, 종래의 PTC 특성을 함유한 소자는 하나의 층(layer)으로 구성되어 과부하 발생시에 설정 온도에서 작동하지만 계속적인 동작으로 설정온도 이상으로 상승시에는 과전류를 차단할 수 없으며, 본 발명은 3층으로 이루어진 두종류의 전도성 복합체로 두단계로 과전류를 차단할 수 있다.As described above, the device containing the conventional PTC characteristic is composed of one layer and operates at the set temperature when an overload occurs, but the continuous operation cannot block the overcurrent when rising above the set temperature. Two types of conductive composites consisting of three layers can block overcurrent in two steps.

이상과 같이, 본 발명은 제 1전도성 복합체의 위, 아랫면에 제 2전도성 복합체를 접합하고, 제 2전도성 복합체의 위, 아랫면에 금속전극을 접합시켜 두 단계로 과전류로 인한 온도의 상승시에 설정온도에서 동작하는 것으로 제 2전도성 복합체는 제 1전도성 복합체와 금속전극의 접합을 위해 사용되며, 두종류의 전도성 복합체를 다층으로 구성하여 전도성 복합체를 함유한 PTC 소자의 특성은 유지하면서 두단계로 과전류를 차단하는 효과가 있다.As described above, in the present invention, the second conductive composite is bonded to the upper and lower surfaces of the first conductive composite, and the metal electrode is bonded to the upper and lower surfaces of the second conductive composite, so that the set temperature is increased when the temperature rises due to overcurrent in two steps. The second conductive composite is used for joining the first conductive composite and the metal electrode, and consists of two kinds of conductive composites in multiple layers to maintain the characteristics of the PTC device containing the conductive composite in two steps. It has the effect of blocking.

Claims (5)

두 종류의 전도성 복합체와 금속전극으로 구성된 전기소자에 있어서,In an electric device composed of two kinds of conductive composites and metal electrodes, 과산화물 가교제가 0.2wt% 첨가된 고밀도 폴리에틸렌으로서 충진제인 카본블랙이 30~40wt% 함유된 제 1전도성복합체와;A first conductive composite containing 30 to 40 wt% of carbon black as a filler as a high density polyethylene having 0.2 wt% of a peroxide crosslinking agent added thereto; 제1전도성복합체의 아랫면과 윗면에 각각 접합되며, 무수말레인 화합물이 0.1~1.0wt% 첨가된 고밀도 폴리에틸렌 또는 저밀도 폴리에틸렌로서 충진제인 카본블랙이 30~40wt% 함유된 제2전도성복합체 및;A second conductive complex bonded to a lower surface and an upper surface of the first conductive composite, each containing a high density polyethylene or a low density polyethylene containing 0.1 to 1.0 wt% of anhydrous maleic compound and containing 30 to 40 wt% of carbon black as a filler; 제2전도성복합체의 아랫면과 윗면에 각각 접합되며, 니켈도금박 또는 니켈압연박 또는 구리도금박에 전해 또는 무전해 도금되어 중심선 평균조도가 1.3이하를 유지하는 금속전극으로 이루어진 것을 특징으로 하는 3층 전도성 복합체를 함유한 전기소자.Three layers, each of which is bonded to the lower and upper surfaces of the second conductive composite, and is made of a metal electrode which is electrolytically or electrolessly plated on nickel plated foil or nickel rolled foil or copper plated foil to maintain a centerline average roughness of 1.3 or less. An electrical device containing a conductive composite. 삭제delete 삭제delete 삭제delete 삭제delete
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