KR20200047966A - Metal deposition film for film capacitor used in driving motor of electric vehicle - Google Patents

Metal deposition film for film capacitor used in driving motor of electric vehicle Download PDF

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KR20200047966A
KR20200047966A KR1020180129507A KR20180129507A KR20200047966A KR 20200047966 A KR20200047966 A KR 20200047966A KR 1020180129507 A KR1020180129507 A KR 1020180129507A KR 20180129507 A KR20180129507 A KR 20180129507A KR 20200047966 A KR20200047966 A KR 20200047966A
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film
layer
electric vehicle
deposited
metal deposition
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KR102140114B1 (en
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한세진
신준섭
유희진
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성문전자주식회사
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Priority to PCT/KR2018/013953 priority patent/WO2020091128A1/en
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    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
    • C23C14/06—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the coating material
    • C23C14/12—Organic material
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
    • C23C14/06—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the coating material
    • C23C14/14—Metallic material, boron or silicon
    • C23C14/20—Metallic material, boron or silicon on organic substrates
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C28/00—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES OR LIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE
    • H01G4/00—Fixed capacitors; Processes of their manufacture
    • H01G4/33—Thin- or thick-film capacitors 
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
    • H02K11/0094—Structural association with other electrical or electronic devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L2220/00—Electrical machine types; Structures or applications thereof
    • B60L2220/50—Structural details of electrical machines
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
    • B60Y2200/00—Type of vehicle
    • B60Y2200/90—Vehicles comprising electric prime movers
    • B60Y2200/91—Electric vehicles
    • 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
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/64—Electric machine technologies in electromobility

Abstract

The present invention relates to a metal deposition film for a film capacitor used in a drive motor of an electric vehicle, and more specifically, to a metal deposition film for a film capacitor used in a drive motor of an electric vehicle, in which a thermosetting material, particularly a melamine resin, is vacuum-deposited to improve heat resistance and oxidation resistance when depositing a zinc or zinc-aluminum alloy layer on the surface of a dielectric film for film capacitor production by a deposition method, and also the capacity of a capacitor is increased due to a high-dielectric constant material so as to make a capacitor inserted in an electric vehicle compact, thereby contributing to the weight reduction of electric vehicles. The metal deposition film includes a base film (10), a first barrier layer (20) vacuum-deposited on the base film (10), a single metal layer (30) deposited on the first barrier layer (20), and a second barrier layer (40) vacuum-deposited on the metal layer (30).

Description

전기자동차의 구동모터에 사용되는 필름콘덴서용 금속증착필름{Metal deposition film for film capacitor used in driving motor of electric vehicle}Metal deposition film for film capacitor used in driving motor of electric vehicle}

본 발명은 전기자동차의 구동모터에 사용되는 필름콘덴서용 금속증착필름에 관한 것으로, 보다 상세하게는 필름콘덴서 제조를 위해 유전체인 필름의 표면에 증착방식으로 아연 또는 아연-알루미늄 합금층을 증착할 때 열경화성재료, 특히 멜라민수지를 진공증착하여 내열성, 내산화성을 개선하고, 고유전율의 열경화성 재료로 인해 콘덴서의 용량도 증가시킴으로써 전기자동차에 들어가는 콘덴서의 소형화를 가능하게 하고, 이를 통해 전기자동차의 경량화에 기여할 수 있도록 개선된 전기자동차의 구동모터에 사용되는 필름콘덴서용 금속증착필름에 관한 것이다.The present invention relates to a metal deposition film for a film capacitor used in a driving motor of an electric vehicle, and more specifically, to deposit a zinc or zinc-aluminum alloy layer by a deposition method on the surface of a dielectric film for the production of a film capacitor. Vacuum-curing thermosetting materials, especially melamine resin, improves heat resistance and oxidation resistance, and increases the capacity of the capacitor due to the high dielectric constant thermosetting material, thereby enabling miniaturization of the capacitor entering the electric vehicle, thereby making the electric vehicle lighter. It relates to a metal deposition film for a film capacitor used in a driving motor of an electric vehicle improved to contribute.

일반적으로, 콘덴서란 전기를 저장할 수 있는 장치로, "축전기"라고 하는데, 이러한 콘덴서의 기본구조는 양 전극 사이에 유전체가 삽입된 구조이다.In general, a capacitor is a device that can store electricity, called a "capacitor," and the basic structure of such a capacitor is a structure in which a dielectric is inserted between both electrodes.

그러한 전극으로는 모든 도체가 가능하나 제조공정상 값이 싸고 납땜성 등 가공성이 우수하며 산화가 잘 되지않는 기본적인 특성을 갖추어야 한다.All such conductors can be used as such electrodes, but they must have basic characteristics that are inexpensive in the manufacturing process, workability such as solderability, and are not easily oxidized.

필름콘덴서의 전극으로는 일반적으로 알루미늄과 아연이 사용되고, 세라믹콘덴서에서는 은, 구리, 니켈, 팔라듐이 사용된다.Aluminum and zinc are generally used as electrodes for film capacitors, and silver, copper, nickel, and palladium are used for ceramic capacitors.

그리고, 전해콘덴서에서는 알루미늄, 탄탈륨 등이 사용되고 있다.In addition, aluminum and tantalum are used in electrolytic capacitors.

한편, 유전체와 전극으로 구성된 기본단위를 소자(Element)라고 하며, 용량을 증가시키기 위하여 소자의 구조를 적층이나 권회형으로 만들고 전자기기에 사용되는 콘덴서는 1개의 소자로 구성되는 제품이 일반적이나 전력용 콘덴서에서는 수십개의 소자를 직, 병렬로 결선하여 필요한 용량으로 구성하고 있다. On the other hand, the basic unit composed of a dielectric and an electrode is called an element, and in order to increase the capacity, the structure of the element is made into a stacked or wound type, and a capacitor used for electronic devices is a product composed of one element, but power is generally used. In the condenser, dozens of elements are connected in direct or parallel to form the required capacity.

단소자 제품의 세라믹 콘덴서 용량단위가 피코파라드인 반면 다소자 제품의 필름콘덴서의 용량단위는 ㎌가 쓰이고 있다.The capacity unit of ceramic capacitors for single-element products is picoparad, whereas the capacity unit of film capacitors for Tsumja products is ㎌.

아울러, 제품을 소형화하기 위하여 유전체와 전극을 일체화시킨 금속증착 필름콘덴서가 일반화되어 있다.In addition, in order to miniaturize the product, a metal deposition film capacitor in which a dielectric and an electrode are integrated is generalized.

그리고, 콘덴서가 전기를 저장하는 기본원리는 유전체의 분극현상 때문이다. 즉, 무전계 상태에서는 유전체 내부의 전기쌍극자가 무질서하게 분포되어 절연체와 같은 성질을 갖고 있으나 전극에 전압을 가하여 전계가 발생하게 되면 쌍극자가 전계의 방향으로 정렬이 된다. 이런 현상을 분극현상이라고 하며 분극현상이 강할수록(쌍극자 수가 많을수록) 유전률이 높아진다. And, the basic principle that capacitors store electricity is because of the polarization of dielectrics. That is, in the electric field state, the electric dipoles inside the dielectric are randomly distributed and have the same properties as an insulator, but when a voltage is applied to the electrode to generate an electric field, the dipoles are aligned in the direction of the electric field. This phenomenon is called polarization, and the stronger the polarization (the more dipoles), the higher the dielectric constant.

분극현상이 발생하게 되면 한쪽 전극에는 플러스(plus) 전하가 반대쪽 전극에는 마이너스(minus) 전하가 밀집하게 되어 전기를 저장할 수 있게 된다.When a polarization phenomenon occurs, a plus charge is concentrated on one electrode and a minus charge is concentrated on the other electrode, so that electricity can be stored.

한편, 필름콘덴서를 구성하는 금속증착필름은 도 1의 예시와 같이, 코팅드럼(100)과 간격을 두고 설치된 마스크(110)로 보트(120)를 통해 가열 증발된 알루미늄 혹은 아연 등의 피증착금속(130)이 상기 코팅드럼(100) 면을 따라 이동하는 베이스필름(150)의 표면에 증착되는 형태로 제조된다.On the other hand, the metal deposition film constituting the film condenser, as illustrated in Figure 1, the coating drum 100, the mask 110 is installed at a distance from the coating metal, such as aluminum or zinc, evaporated by heating through the boat 120 130 is manufactured in a form that is deposited on the surface of the base film 150 is moved along the surface of the coating drum (100).

이때, 상기 금속증착필름은 진공챔버(140) 속에서 일정 진공상태로 유지된 채 증착되는 진공증착방식으로 이루어진다.At this time, the metal deposition film is made of a vacuum deposition method that is deposited while maintaining a constant vacuum in the vacuum chamber 140.

이 경우, 교류전원용으로 사용되는 필름콘덴서는 알루미늄과 아연을 통해 전극을 형성하는 형태의 금속증착필름이 개시되어 있는데, 이러한 금속증착필름에서는 도 2의 예시와 같이, 폴리프로필렌을 기재로 하는 베이스필름(150)의 상면을 이온 건(Ion Gun) 방식으로 표면개질하여 부착력을 높인 상태에서 알루미늄증착층(152)을 수 나노미터(nm) 두께로 형성하고, 상기 알루미늄증착층(152) 위에 수십 나노미터(nm)의 아연증착층(154)을 형성하며, 상기 아연증착층(154) 위에 산화에 취약한 아연층 보호 목적으로 오일을 도포하여 오일층(156)을 형성한 구조를 갖는다.In this case, a film condenser used for AC power is disclosed in a metal deposition film in the form of an electrode through aluminum and zinc. In this metal deposition film, as illustrated in FIG. 2, a base film based on polypropylene is used. The surface of the surface of 150 is modified with an ion gun to form an aluminum deposition layer 152 to a thickness of several nanometers (nm) in a state where the adhesion is increased, and several tens of nanometers are deposited on the aluminum deposition layer 152. A zinc deposition layer 154 of a meter (nm) is formed, and an oil layer 156 is formed on the zinc deposition layer 154 by applying oil for the purpose of protecting a zinc layer susceptible to oxidation.

이것은 도전성을 높이면서 박리성을 억제(열접착성을 증대)하기 위해 알루미늄증착층(152)과 아연증착층(154)을 2층 구조로 형성하고 있으며, 오일층(156)은 아연이 산화되는 것을 막기 위한 것이다.This is to form a two-layer structure of the aluminum deposition layer 152 and the zinc deposition layer 154 in order to increase the conductivity while suppressing the peelability (increasing thermal adhesion), the oil layer 156 is zinc is oxidized It is to prevent things.

그런데, 이러한 구조는 안정적인 증착구조를 갖출 수 있고 도전성이 좋다는 장점이 있음에도 불구하고, 증착 두께 조절시 저항을 모니터링하면서 하는데 알루미늄증착층(152)과 아연증착층(154)과 같이 층이 2개다 보니 저항 모니터링이 어려워 두께 조절이 어렵다는 한계를 가지고 있다.However, although this structure has a merit of having a stable deposition structure and good conductivity, it monitors resistance when controlling the deposition thickness, but it has two layers, such as the aluminum deposition layer 152 and the zinc deposition layer 154. It is difficult to monitor the resistance, so it has a limitation that it is difficult to control the thickness.

또한, 패터닝을 하거나 혹은 부피를 줄이기 위해 프레스를 수행할 필요가 있는데, 이 경우 오일층(156) 때문에 미끄러지면서 프레스 공정 수행이 어렵고, 나아가 오일 때문에 오히려 전기연결성, 즉 접속불량을 야기하는 문제를 파생시키기도 한다.In addition, it is necessary to perform press to pattern or reduce the volume. In this case, it is difficult to perform the press process while slipping due to the oil layer 156, and furthermore, the problem of causing electrical connection, that is, poor connection due to oil is derived. It is also ordered.

뿐만 아니라, 금속증착필름은 전기자동차의 구동모터에서도 차륜을 굴려 주는 인버터용 콘덴서에도 사용되는데, 여기에는 고전압고 고전류가 흐르게 된다.In addition, the metal deposition film is also used in the condenser for the inverter that rolls the wheel in the driving motor of an electric vehicle, where high voltage and high current flow.

때문에, 주파수특성이 균일해야 하고, 전기손실율도 낮아야 하며, 내열성도 가져야 한다.Therefore, the frequency characteristics should be uniform, the electrical loss rate should be low, and the heat resistance should also be provided.

예컨대, 순간출발시 혹은 가속시 3.7V 배터리를 직렬연결한 IGBT 증폭 전압 및 전류가 현격히 커지게 되는데, 이 전기적인 충격을 콘덴서가 잡아 주어야 한다.For example, at instantaneous start or acceleration, the IGBT amplification voltage and current connected to the 3.7V battery in series increase significantly, and the electric shock must hold the capacitor.

이를 위해, 종래 구조의 콘덴서용 필름은 충분한 길이를 가져야 하는데, 막이 두꺼운 관계(2층 구조)로 볼륨이 커질 수 밖에 없고, 이것은 결국 콘덴서의 무게를 증대시켜 전기자동차의 경량화를 저해하는 요인이 된다.To this end, the film for the capacitor of the conventional structure should have a sufficient length, but the volume is inevitably increased due to the thick film relationship (two-layer structure), which in turn increases the weight of the capacitor, thereby inhibiting the weight reduction of the electric vehicle. .

대한민국 공개특허 제10-1998-066056호(1998.10.15.), '스프레이면을 강화한 콘덴서용 알루미늄 금속 증착필름과 그 제조방법'Republic of Korea Patent Publication No. 10-1998-066056 (October 15, 1998), 'Aluminum metal deposition film for capacitors with reinforced spray backing and manufacturing method thereof' 대한민국 공개특허 제10-2000-0042117호(2000.07.15.), '두 개의 강화 층을 갖는 콘덴서용 금속 증착 필름 및 그 제조방법'Republic of Korea Patent Publication No. 10-2000-0042117 (2000.07.15.), 'Metal deposition film for a capacitor having two reinforced layers and a method of manufacturing the same' 대한민국 공개특허 제10-2017-0010244호(2017.01.26.), '금속증착필름의 진공증착장치'Republic of Korea Patent Publication No. 10-2017-0010244 (2017.01.26.), 'Vacuum deposition device of metal deposition film' 대한민국 공개특허 제10-2017-0067278호(2017.06.16.), '필름 콘덴서'Republic of Korea Patent Publication No. 10-2017-0067278 (2017.06.16.), 'Film capacitor'

본 발명은 상술한 바와 같은 종래 기술상의 제반 문제점들을 감안하여 이를 해결하고자 창출된 것으로, 필름콘덴서 제조를 위해 유전체인 필름의 표면에 증착방식으로 아연 또는 아연-알루미늄 합금층을 증착할 때 열경화성재료, 특히 멜라민수지를 진공증착하여 내열성, 내산화성을 개선하고, 고유전율의 열경화성 재료로 인해 콘덴서의 용량도 증가시킴으로써 전기자동차에 들어가는 콘덴서의 소형화를 가능하게 하고, 이를 통해 전기자동차의 경량화에 기여할 수 있도록 개선된 전기자동차의 구동모터에 사용되는 필름콘덴서용 금속증착필름을 제공함에 그 주된 목적이 있다.The present invention was created to solve the problems in consideration of various problems in the prior art as described above, a thermosetting material when depositing a zinc or zinc-aluminum alloy layer by a deposition method on the surface of the film as a dielectric for the production of film capacitors, In particular, the melamine resin is vacuum-deposited to improve heat resistance and oxidation resistance, and the capacity of the condenser is also increased due to the high dielectric constant thermosetting material, thereby enabling miniaturization of the condenser entering the electric vehicle, thereby contributing to the reduction in the weight of the electric vehicle. The main objective is to provide a metal deposition film for a film capacitor used in an improved electric vehicle drive motor.

본 발명은 상기한 목적을 달성하기 위한 수단으로, 기재필름(10)과; 상기 기재필름(10) 위에 진공증착된 제1베리어층(20)과; 상기 제1베리어층(20) 위에 박막 층착된 단일의 금속층(30)과; 상기 금속층(30) 위에 진공증착된 제2베리어층(40);을 포함하는 것을 특징으로 하는 전기자동차의 구동모터에 사용되는 필름콘덴서용 금속증착필름을 제공한다.The present invention as a means for achieving the above object, the base film 10 and; A first barrier layer 20 vacuum-deposited on the base film 10; A single metal layer 30 layered on the first barrier layer 20; It provides a metal deposition film for a film capacitor used in a driving motor of an electric vehicle comprising a; a second barrier layer 40 vacuum-deposited on the metal layer (30).

또한, 본 발명은 기재필름(10)과; 상기 기재필름(10)의 하면에 진공증착된 제1베리어층(20)과; 상기 기재필름(10) 위에 박막 층착된 단일의 금속층(30)과; 상기 금속층(30) 위에 진공증착된 제2베리어층(40);을 포함하는 것을 특징으로 하는 전기자동차의 구동모터에 사용되는 필름콘덴서용 금속증착필름도 제공한다.In addition, the present invention is a base film 10 and; A first barrier layer 20 vacuum-deposited on the lower surface of the base film 10; A single metal layer 30 layered on the base film 10; Also provided is a metal deposition film for a film capacitor used in a driving motor of an electric vehicle, comprising; a second barrier layer 40 vacuum-deposited on the metal layer 30.

이때, 상기 기재필름(10)은 2.5㎛ 이하의 두께를 갖는 폴리프로필렌 필름 또는 폴리에틸렌테레프탈레이트 필름이고; 상기 제1,2베리어층(20)은 멜라민수지로 이루어진 층이며; 상기 금속층(30)은 아연 단일층 혹은 아연-알루미늄 합금 단일층인 것에도 그 특징이 있다.At this time, the base film 10 is a polypropylene film or a polyethylene terephthalate film having a thickness of 2.5 μm or less; The first and second barrier layers 20 are layers made of melamine resin; The metal layer 30 is also characterized by being a single layer of zinc or a single layer of zinc-aluminum alloy.

본 발명에 따르면, 다음과 같은 효과를 얻을 수 있다.According to the present invention, the following effects can be obtained.

첫째, 필름콘덴서 제조를 위해 유전체인 필름의 표면에 증착방식으로 아연 또는 아연-알루미늄 합금층을 증착할 때 열경화성재료, 특히 멜라민수지를 진공증착하여 내열성, 내산화성을 개선하는 효과가 있다.First, when depositing a zinc or zinc-aluminum alloy layer by vapor deposition on the surface of a dielectric film for the production of film capacitors, there is an effect of improving heat resistance and oxidation resistance by vacuum deposition of a thermosetting material, particularly melamine resin.

둘째, 고유전율의 열경화성 재료로 인해 콘덴서의 용량도 증가시킴으로써 전기자동차에 들어가는 콘덴서의 소형화를 가능하게 한다.Second, by increasing the capacity of the capacitor due to the high dielectric constant thermosetting material, it is possible to miniaturize the capacitor entering the electric vehicle.

세째, 소형화에 따라 전기자동차의 경량화에 기여할 수 있다.Third, it can contribute to the reduction in weight of the electric vehicle according to the miniaturization.

도 1은 종래 기술에 따른 금속증착필름 제조용 증착장치의 요부를 발췌하여 보인 모식도이다.
도 2는 종래 기술에 따라 형성된 금속증착필름의 예시적인 단면도이다.
도 3은 본 발명에 따른 전기자동차의 구동모터에 사용되는 필름콘덴서용 금속증착필름의 예시적인 단면도이다.
도 4는 본 발명에 따른 전기자동차의 구동모터에 사용되는 필름콘덴서용 금속증착필름의 다른 예를 보인 예시적인 단면도이다.1 is a schematic view showing a main portion of a deposition apparatus for manufacturing a metal deposition film according to the prior art.
Figure 2 is an exemplary cross-sectional view of a metal deposition film formed according to the prior art.
3 is an exemplary cross-sectional view of a metal deposition film for a film capacitor used in a driving motor of an electric vehicle according to the present invention.
4 is an exemplary cross-sectional view showing another example of a metal deposition film for a film capacitor used in a driving motor of an electric vehicle according to the present invention.

이하에서는, 첨부도면을 참고하여 본 발명에 따른 바람직한 실시예를 보다 상세하게 설명하기로 한다.Hereinafter, preferred embodiments of the present invention will be described in more detail with reference to the accompanying drawings.

본 발명 설명에 앞서, 이하의 특정한 구조 내지 기능적 설명들은 단지 본 발명의 개념에 따른 실시예를 설명하기 위한 목적으로 예시된 것으로, 본 발명의 개념에 따른 실시예들은 다양한 형태로 실시될 수 있으며, 본 명세서에 설명된 실시예들에 한정되는 것으로 해석되어서는 아니된다.Prior to the description of the present invention, the following specific structures or functional descriptions are merely exemplified for the purpose of illustrating the embodiments according to the concept of the present invention, and the embodiments according to the concept of the present invention may be implemented in various forms, It should not be construed as being limited to the embodiments described herein.

또한, 본 발명의 개념에 따른 실시예는 다양한 변경을 가할 수 있고 여러 가지 형태를 가질 수 있으므로, 특정 실시예들은 도면에 예시하고 본 명세서에 상세하게 설명하고자 한다. 그러나, 이는 본 발명의 개념에 따른 실시예들을 특정한 개시 형태에 한정하려는 것이 아니며, 본 발명의 사상 및 기술 범위에 포함되는 모든 변경물, 균등물 내지 대체물을 포함하는 것으로 이해되어야 한다.In addition, embodiments according to the concept of the present invention can be applied to various changes and may have various forms, so specific embodiments will be illustrated in the drawings and described in detail herein. However, this is not intended to limit the embodiments according to the concept of the present invention to a specific disclosure form, and it should be understood that it includes all modifications, equivalents, and substitutes included in the spirit and scope of the present invention.

본 발명의 바람직한 일 실시예에 따른 전기자동차의 구동모터에 사용되는 필름콘덴서용 금속증착필름은 금속증착층이 2층 구조가 아닌 아연 단일층 혹은 아연-알루미늄 합금으로 형성된 단일층으로 이루어진다.The metal deposition film for a film capacitor used in a drive motor of an electric vehicle according to an exemplary embodiment of the present invention is composed of a single layer formed of a zinc single layer or a zinc-aluminum alloy, not a two-layer metal deposition layer.

보다 구체적으로, 도 3에 도시된 바와 같이, 본 발명 일실시예에 따른 금속증착필름은 기재필름(10)과, 상기 기재필름(10) 위에 진공증착된 제1베리어층(20)과, 상기 제1베리어층(20) 위에 박막 층착된 금속층(30)과, 상기 금속층(30) 위에 진공증착된 제2베리어층(40)으로 이루어진다.More specifically, as shown in FIG. 3, the metal deposition film according to an embodiment of the present invention includes a base film 10, a first barrier layer 20 vacuum-deposited on the base film 10, and The first barrier layer 20 is formed of a metal layer 30 deposited on the thin film layer and a second barrier layer 40 vacuum-deposited on the metal layer 30.

이때, 상기 기재필름(10)은 폴리프로필렌 필름 또는 폴리에틸렌테레프탈레이트 필름이며, 박막 형성을 위해 두께는 2.5㎛ 이하로 유지되어야 한다.At this time, the base film 10 is a polypropylene film or a polyethylene terephthalate film, and the thickness must be maintained at 2.5 µm or less for forming a thin film.

그리고, 상기 제1,2베리어층(20,40)은 이 경우, 상기 베리어층(30)은 열경화성수지로 이루어져야 하며, 가장 바람직한 수지로는 멜라민수지이다.In addition, in the case of the first and second barrier layers 20 and 40, the barrier layer 30 should be made of a thermosetting resin, and the most preferred resin is melamine resin.

더구나, 상기 제1,2베리어층(20,40)은 후술되는 금속층(30)이 산화되는 것도 방지하므로 자연스럽게 기존 오일층의 기능도 함께 수행하게 되어 오일층의 존재로 인해 발생하던 문제까지 일소시키는 특장점도 가진다.Moreover, since the first and second barrier layers 20 and 40 also prevent oxidation of the metal layer 30 to be described later, the function of the existing oil layer is naturally performed together, thereby eliminating problems caused by the existence of the oil layer. It also has its advantages.

특히, 상기 제1,2베리어층(20,40)은 수분차단, 산소차단 특성을 기본적으로 갖추어야 하고, 나아가 내열성과 투명성 및 일정이상의 유전율을 갖추어야 한다.In particular, the first and second barrier layers 20 and 40 should basically have moisture blocking and oxygen blocking characteristics, and furthermore, must have heat resistance, transparency, and a dielectric constant of a certain level or higher.

이를 위해, 본 발명에서 적용하는 멜라민수지는 멜라민과 포름알데히드의 축합(縮合)물의 수지로서 가열하면 녹지 않고 바로 기화되는 특성을 가진 내열성 물질이며, PET 보다 낮은 굴절율(1.4)을 가지고 있어 투명하며, 수분차단 특성과 산소차단 특성이 우수하고, 유전율도 6 정도로 높아 본 발명에 매우 적합한 베리어를 구성한다.To this end, the melamine resin applied in the present invention is a heat-resistant material having a property of evaporating without melting when heated as a resin of a condensate of melamine and formaldehyde, and is transparent because it has a lower refractive index (1.4) than PET. It has excellent moisture barrier properties and oxygen barrier properties, and also has a high dielectric constant of about 6, thus forming a barrier suitable for the present invention.

때문에, 상기 멜라민수지는 기존 알루미늄증착층과 오일층이 갖는 특성들을 모두 감당할 수 있게 된다.Therefore, the melamine resin can handle all the characteristics of the existing aluminum deposition layer and the oil layer.

더구나, 멜라민은 헤테로고리 모양의 아민으로서 유기염기이며, 사이안아마이드의 삼량체이기 때문에 질량의 66%가 질소로 이루어져 불에도 잘 견디는 성질도 갖는다. 즉, 내화성도 있다.Moreover, melamine is an organic base as a heterocyclic amine, and because it is a triamide of cyanamide, 66% of its mass is made of nitrogen, so it has a property to withstand fire. That is, there is also fire resistance.

이와 같이, 상기 제1,2베리어층(20,40)이 산소와 수분을 완벽하게 차단하기 때문에 금속층(30)의 산화를 막아 장수명화는 물론 콘덴싱 효과를 제대로 구현할 수 있다. 이것은 기재필름(10)에 함유되어 있던 산소와 수분이 열을 받아 용출되면서 금속층, 특히 산화가 잘되는 아연을 쉽게 산화시키기 때문인데, 이를 베리어하게 되므로 그러한 현상을 차단할 수 있게 된다.As described above, since the first and second barrier layers 20 and 40 completely block oxygen and moisture, oxidation of the metal layer 30 can be prevented, and thus long life and condensing effects can be properly implemented. This is because oxygen and moisture contained in the base film 10 are easily oxidized to the metal layer, particularly oxidized zinc as it elutes under heat, and thus it is possible to block such a phenomenon.

즉, 멜라민수지에 의헤 베리어가 형성되기 때문에 전기자동차의 구동모터에 사용되는 콘덴서용 금속증착필름 적용시 주파수 특성을 균일하게 유지할 수 있고, 전기손실율을 낮추며, 내열성을 올려 순간출발시 혹은 급가속이나 가속시 전기적인 충격을 충분히 완충시킬 수 있고, 발열에 따른 패턴 터짐 현상도 억제할 수 있게 된다. 이것은 기재필름(10)이 열에 약하기 때문에 제1,2베리어층(20,40)이 이를 보강하는 기능도 하기 때문이다.That is, since a barrier is formed on the melamine resin, it is possible to maintain the frequency characteristics uniformly when applying a metal deposition film for a capacitor used in a driving motor of an electric vehicle, lower the electrical loss rate, and increase the heat resistance, so that it can be instantaneous or suddenly accelerated. When accelerating, the electric shock can be sufficiently buffered, and the pattern bursting phenomenon due to heat generation can be suppressed. This is because the first and second barrier layers 20 and 40 function to reinforce the base film 10 because it is weak to heat.

무엇보다도, 온도가 올라가면 고열에 의해 패턴이 터지기 때문에 콘덴서의 용량이 떨어지게 되고, 또한 산화될 경우 출력이 떨어져 배터리 수명이 단축되게 되지만, 베리어 효과에 의해 이러한 현상을 방지하므로 배터리의 수명도 연장할 수 있게 된다.Above all, when the temperature rises, the capacity of the condenser decreases because the pattern bursts due to high temperature, and when oxidized, the output falls and the battery life is shortened, but the barrier effect prevents this phenomenon, so the battery life can be extended. There will be.

뿐만 아니라, 상기 제1,2베리어층(20,40)도 박막으로 구현할 수 있고, 그로 인해 얻을 수 있는 베리어 효과 때문에 기재필름(10)과, 금속층(30)의 두께를 낮출 수 있는데, 이는 제1,2베리어층(20,40)을 구성하는 멜라민수지가 고유전율 특성도 갖기 때문에 박막이지만 2개의 베리어로 인해 유전율 특성, 즉 전기용량을 증대시킬 수 있으므로 콘덴서 구성시 감는 턴수를 줄일 수 있게 되어 볼륨 축소에 따른 경량화에도 기여한다.In addition, the first and second barrier layers 20 and 40 may also be implemented as a thin film, and thus the thickness of the base film 10 and the metal layer 30 may be lowered due to the barrier effect obtained. The melamine resin constituting the 1,2-barrier layer (20, 40) also has a high dielectric constant, but it is a thin film due to the two barriers, so it can increase the dielectric constant, that is, the electric capacity, so it is possible to reduce the number of turns when condenser is configured It also contributes to weight reduction due to volume reduction.

다시 말해, C(전기용량) = ε(유전율) × (전극면적/두께)로 정해지는데, 본 발명의 경우 멜라민수지를 도입하여 유전율을 높일 수 있기 때문에 기존과 동일 용량 설계시 그 만큼 전극면적, 즉 감는 턴수를 줄일 수 있다. 물론, 두께를 더 줄이면 전기용량을 더 늘릴 수도 있다.In other words, C (capacity) = ε (permittivity) × (electrode area / thickness) is determined. In the present invention, the dielectric constant can be increased by introducing melamine resin, so that the electrode area is the same as in the previous capacity design. In other words, the number of turns to wind can be reduced. Of course, if the thickness is further reduced, the electric capacity can be further increased.

때문에, 감는 턴수가 줄어 들면 그 만큼 콘덴서의 볼륨이 작아져 컴팩트화가 가능하고, 그에 따라 무게 절감도 가능하여 전기자동차의 경우 경량화에 기여할 수 있게 된다.Therefore, if the number of turns to be wound decreases, the volume of the condenser is reduced by that amount, so that the compaction is possible, and accordingly, the weight can be reduced, thereby contributing to the weight reduction in the electric vehicle.

한편, 상기 금속층(30)은 아연 단일층 혹은 아연-알루미늄 합금 단일층으로 증착 형성된다.Meanwhile, the metal layer 30 is deposited by a single layer of zinc or a single layer of zinc-aluminum alloy.

이것은 기존의 2층 구조와는 전혀 다른 구조일 뿐만 아니라, 두께를 현저히 낮출 수 있다.This is not only a completely different structure from the existing two-layer structure, but also can significantly lower the thickness.

여기에서, 기존의 알루미늄증착층을 배제시킨 것으로서, 아연을 폴리프로필렌필름 또는 폴리에틸렌테레프탈레이트 중 하나의 기재필름(10)에 직접 증착시키는 것에 의해 폴리프로필렌필름 또는 폴리에틸렌테레프탈레이트중 하나의 기재필름(10)의 표면만을 개질하여 두 개의 층이 아닌 하나의 층을 코팅함으로써 공정 단순화를 달성할 수 있다.Here, as the existing aluminum deposition layer is excluded, the base film 10 of either the polypropylene film or the polyethylene terephthalate by directly depositing zinc on the base film 10 of the polypropylene film or the polyethylene terephthalate The process simplification can be achieved by modifying only the surface of) to coat one layer rather than two.

예컨대, 알루미늄증착층의 주된 역할은 방습성, 가스베리어성 및 보향성, 봉합성(열접착성)을 얻기 위함인 바, 본 발명에서는 기존의 오일층이 아닌 제2베리어층(40)을 아연증착층(20) 상면에 형성함으로써 알루미늄증착층의 존재로 인해 얻을 수 있는 동등한 효과를 얻도록 한 것이다.For example, the main role of the aluminum deposition layer is to obtain moisture-proof, gas-barrier and directional, and sealability (thermal adhesion). In the present invention, the second barrier layer 40 rather than the existing oil layer is zinc-deposited. By forming it on the upper surface of the layer 20, an equivalent effect that can be obtained due to the presence of the aluminum deposition layer is obtained.

이에 더하여, 본 발명에서는 제2베리어층(40)이 스킨을 형성하기 때문에 내스크래치성과 내열성 및 내전압성을 더욱 강화시키기 위해 상기 멜라민수지에 에보나이트 2.5중량부와, 시아노아크릴레이트 1.5중량부와, 옥시비스 1.5중량부와, 구형실리카 2.5중량부 및 2-페닐이미다졸 2.5중량부를 더 첨가할 수 있다.In addition, in the present invention, since the second barrier layer 40 forms a skin, 2.5 parts by weight of ebonite and 1.5 parts by weight of cyanoacrylate, to further enhance the scratch resistance, heat resistance, and voltage resistance, 1.5 parts by weight of oxybis, 2.5 parts by weight of spherical silica and 2.5 parts by weight of 2-phenylimidazole may be further added.

이때, 상기 에보나이트는 생고무에 유황과 다른 배합물을 첨가하고 가열하여 만든 경질 고무로서 전기의 절연, 즉 내전압성을 강화시키기 위해 첨가된다.At this time, the ebonite is a hard rubber made by adding sulfur and other blends to raw rubber and heating it, and is added to enhance electrical insulation, that is, withstand voltage.

그리고, 상기 시아노아크릴레이트(cyanoacrylate)는 고열팽창을 억제하고 접착고정력을 극대화시키면서 접착 안정성을 강화시키기 위해 첨가된다.Then, the cyanoacrylate (cyanoacrylate) is added to enhance the adhesion stability while suppressing the high thermal expansion and maximize the adhesive fixing force.

또한, 상기 옥시비스(OXYBIS)는 가교기능을 통해 경화피막을 형성함으로써 내마모성을 강화시키기 위해 첨가되는 것으로 이소프로필에테르(Iso-PropylEther)를 말하고, 상기 구형실리카는 비중차로 인해 조성물내에서 표면으로 부상하여 표면에만 존재하므로 표면에서의 매끄럼성을 유지함은 물론 표면에서의 내스크래치성을 강화시키는 역할을 하게 된다.In addition, the oxybis (OXYBIS) refers to isopropyl ether (Iso-PropylEther) as being added to enhance abrasion resistance by forming a cured film through a crosslinking function, and the spherical silica is surfaced in the composition due to specific gravity difference. Therefore, since it exists only on the surface, it maintains smoothness on the surface and serves to enhance scratch resistance on the surface.

아울러, 상기 2-페닐이미다졸은 반응물의 구조적 안정성을 증대시키면서 가열건조시 열수축률이 적어 액의 열안정성을 강화시키고, 특히 도막의 부착력을 증대시키기 위해 첨가된다.In addition, the 2-phenylimidazole is added to enhance the structural stability of the reactant and to increase the thermal stability of the liquid due to a small heat shrinkage during heat drying, and in particular to increase the adhesion of the coating film.

다른 한편, 본 발명에 따른 금속증착필름은 도 4와 같은 형태의 다른 실시예로도 구현될 수 있다.On the other hand, the metal deposition film according to the present invention may be implemented in another embodiment of the form shown in FIG. 4.

도 4에 따르면, 본 발명의 다른 실시예에 따른 전기자동차의 구동모터에 사용되는 필름콘덴서용 금속증착필름은 기재필름(10)과; 상기 기재필름(10)의 하면에 진공증착된 제1베리어층(20)과; 상기 기재필름(10) 위에 박막 층착된 단일의 금속층(30)과; 상기 금속층(30) 위에 진공증착된 제2베리어층(40);을 포함하는 구조를 가질 수 있다.According to FIG. 4, a metal deposition film for a film capacitor used in a driving motor of an electric vehicle according to another embodiment of the present invention includes a base film 10; A first barrier layer 20 vacuum-deposited on the lower surface of the base film 10; A single metal layer 30 layered on the base film 10; It may have a structure comprising; a second barrier layer 40 vacuum-deposited on the metal layer 30.

이때, 각 층의 재료와 특성 등에 대해서는 앞서 설명한 바와 같기 때문에 중복 설명은 생략한다.At this time, the material and properties of each layer are the same as described above, so a duplicate description is omitted.

이와 같이, 본 발명은 아주 간단하고 단순해 보이지만, 지금까지 개시되지 못했고, 지금까지 문제로 적체만 되어 왔지 해결하지 못하고 있던 문제를 일소하면서 생산효율, 공정효율, 비용절감 모두를 달성하는 현저한 효과를 제공한다.As described above, the present invention looks very simple and simple, but has not been disclosed so far, and has been solved as a problem that has been solved as a problem until now, while remarkable effects of achieving both production efficiency, process efficiency, and cost reduction. to provide.

10: 기재필름
20: 제1베리어층
30: 금속층
40: 제2베리어층10: base film
20: first barrier layer
30: metal layer
40: second barrier layer

Claims (3)

기재필름(10)과;
상기 기재필름(10) 위에 진공증착된 제1베리어층(20)과;
상기 제1베리어층(20) 위에 박막 층착된 단일의 금속층(30)과;
상기 금속층(30) 위에 진공증착된 제2베리어층(40);을 포함하는 것을 특징으로 하는 전기자동차의 구동모터에 사용되는 필름콘덴서용 금속증착필름.
A base film 10;
A first barrier layer 20 vacuum-deposited on the base film 10;
A single metal layer 30 layered on the first barrier layer 20;
A metal deposition film for a film capacitor used in a driving motor of an electric vehicle, comprising; a second barrier layer 40 vacuum-deposited over the metal layer 30.
기재필름(10)과;
상기 기재필름(10)의 하면에 진공증착된 제1베리어층(20)과;
상기 기재필름(10) 위에 박막 층착된 단일의 금속층(30)과;
상기 금속층(30) 위에 진공증착된 제2베리어층(40);을 포함하는 것을 특징으로 하는 전기자동차의 구동모터에 사용되는 필름콘덴서용 금속증착필름.
A base film 10;
A first barrier layer 20 vacuum-deposited on the lower surface of the base film 10;
A single metal layer 30 layered on the base film 10;
A metal deposition film for a film capacitor used in a driving motor of an electric vehicle, comprising; a second barrier layer 40 vacuum-deposited over the metal layer 30.
청구항 1 또는 청구항 2에 있어서,
상기 기재필름(10)은 2.5㎛ 이하의 두께를 갖는 폴리프로필렌 필름 또는 폴리에틸렌테레프탈레이트 필름이고;
상기 제1,2베리어층(20)은 멜라민수지로 이루어진 층이며;
상기 금속층(30)은 아연 단일층 혹은 아연-알루미늄 합금 단일층인 것을 특징으로 하는 전기자동차의 구동모터에 사용되는 필름콘덴서용 금속증착필름.
The method according to claim 1 or claim 2,
The base film 10 is a polypropylene film or a polyethylene terephthalate film having a thickness of 2.5 μm or less;
The first and second barrier layers 20 are layers made of melamine resin;
The metal layer 30 is a single layer of zinc or a single layer of zinc-aluminum alloy. The metal deposition film for film capacitors used in driving motors of electric vehicles.
KR1020180129507A 2018-10-29 2018-10-29 Metal deposition film for film capacitor used in driving motor of electric vehicle KR102140114B1 (en)

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