JP2015032424A - Fuse - Google Patents

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Publication number
JP2015032424A
JP2015032424A JP2013160518A JP2013160518A JP2015032424A JP 2015032424 A JP2015032424 A JP 2015032424A JP 2013160518 A JP2013160518 A JP 2013160518A JP 2013160518 A JP2013160518 A JP 2013160518A JP 2015032424 A JP2015032424 A JP 2015032424A
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Prior art keywords
fuse
electrodes
pair
insulating substrate
space
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Japanese (ja)
Inventor
敬治 白田
Takaharu Shirata
敬治 白田
長瀬　敏之
Toshiyuki Nagase
敏之 長瀬
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Mitsubishi Materials Corp
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Mitsubishi Materials Corp
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Priority to JP2013160518A priority Critical patent/JP2015032424A/en
Priority to CN201410326925.5A priority patent/CN104347331A/en
Publication of JP2015032424A publication Critical patent/JP2015032424A/en
Pending legal-status Critical Current

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H85/00—Protective devices in which the current flows through a part of fusible material and this current is interrupted by displacement of the fusible material when this current becomes excessive
    • H01H85/02—Details
    • H01H85/04—Fuses, i.e. expendable parts of the protective device, e.g. cartridges
    • H01H85/05—Component parts thereof
    • H01H85/055—Fusible members
    • H01H85/06—Fusible members characterised by the fusible material
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H85/00—Protective devices in which the current flows through a part of fusible material and this current is interrupted by displacement of the fusible material when this current becomes excessive
    • H01H85/02—Details
    • H01H85/04—Fuses, i.e. expendable parts of the protective device, e.g. cartridges
    • H01H85/05—Component parts thereof
    • H01H85/055—Fusible members
    • H01H85/08—Fusible members characterised by the shape or form of the fusible member

Abstract

PROBLEM TO BE SOLVED: To provide a fuse that can be made small even at high breakdown voltage.SOLUTION: The fuse comprises an insulation substrate 2, a pair of electrodes 3 formed on the insulation substrate, a fuse part 4 whose both ends are connected to the pair of electrodes, and an insulation sealing material 5 at least covering the fuse part on the insulation substrate. The fuse part is formed so that at least one part is swollen at an intermediate part between both ends, and a space S is provided across at least one pair of electrodes between the intermediate part and the insulation substrate. Also, the fuse part is formed into an approximate wave-like shape so that a cross section shape crossing between the pair of electrodes has an approximate wave shape.

Description

本発明は、自動車等の電気回路において過電流発生時や異常温度時に溶断して電子部品や回路等を保護するヒューズに関する。   The present invention relates to a fuse that is fused when an overcurrent occurs or an abnormal temperature in an electric circuit of an automobile or the like to protect an electronic component, circuit, or the like.

一般に、自動車や電気製品等には、過電流や異常温度から電子部品や回路等を保護するためにヒューズが組み込まれている。特に近年、ハイブリッドカーや電気自動車等には、複数のバッテリーやコンデンサが搭載されており、これらに関連した保護回路にもヒューズが用いられている。
従来、高耐圧のヒューズでは、絶縁距離を確保するため、外形を大きくする必要があり、また大電流用途では、アークを防止若しくは素早く消孤するための構造を必要としていた。また、小型化するために、ヒューズを樹脂等でモールドする方法が提案されている（例えば、特許文献１参照）。 2. Description of the Related Art Generally, fuses are incorporated in automobiles and electrical products in order to protect electronic parts and circuits from overcurrents and abnormal temperatures. Particularly in recent years, hybrid cars, electric cars, and the like are equipped with a plurality of batteries and capacitors, and fuses are also used in related protection circuits.
Conventionally, in order to secure an insulation distance, a high breakdown voltage fuse has to have a large outer shape, and in a large current application, a structure for preventing or quickly extinguishing an arc has been required. In order to reduce the size, a method of molding a fuse with a resin or the like has been proposed (for example, see Patent Document 1).

特開２０１１−２４３３８８号公報JP 2011-243388 A

上記従来の技術には、以下の課題が残されている。
従来の樹脂等でヒューズ部をモールドしたヒューズ構造では、ヒューズ部が溶けても溶断しない又は溶断し難いという問題があった。特に、ハイブリッドカーや電気自動車等に搭載の高電圧機器において、制御装置が小型化する中でヒューズにおいても高耐圧特性を有しながら小型化することが要望されている。 The following problems remain in the conventional technology.
In the conventional fuse structure in which the fuse portion is molded with resin or the like, there is a problem that even if the fuse portion is melted, it is not blown or difficult to blow. In particular, in a high-voltage device mounted on a hybrid car, an electric vehicle, or the like, a fuse is required to be downsized while having a high withstand voltage characteristic as the control device is downsized.

本発明は、前述の課題に鑑みてなされたもので、高耐圧でありながら小型化が可能なヒューズを提供することを目的とする。   The present invention has been made in view of the above-described problems, and an object thereof is to provide a fuse that can be miniaturized while having a high breakdown voltage.

本発明は、前記課題を解決するために以下の構成を採用した。すなわち、第１の発明に係るヒューズは、絶縁性基板と、前記絶縁性基板上に形成された一対の電極と、前記一対の電極に両端が接続されたヒューズ部とを備え、前記ヒューズ部が、前記両端の間の中間部において少なくとも一部が盛り上がって形成され、前記中間部と前記絶縁性基板との間に少なくとも前記一対の電極間にわたって空間が設けられていることを特徴とする。
このヒューズでは、中間部と絶縁性基板との間に少なくとも一対の電極間にわたって空間が設けられているので、ヒューズ部が溶融した際に、下部に空間が存在することで形状変化して空間内で移動し易くなり、外側が樹脂等の絶縁性封止材で封止されていても容易に溶断可能となる。また、ヒューズ部下部の空間を大きく設定することで、耐圧が高くなると共に消孤距離も十分に確保することができる。 The present invention employs the following configuration in order to solve the above problems. That is, the fuse according to the first invention includes an insulating substrate, a pair of electrodes formed on the insulating substrate, and a fuse portion having both ends connected to the pair of electrodes, the fuse portion being Further, at least a part of the intermediate portion between the both ends is formed so as to rise, and a space is provided between the intermediate portion and the insulating substrate over at least the pair of electrodes.
In this fuse, since a space is provided between at least a pair of electrodes between the intermediate portion and the insulating substrate, when the fuse portion melts, the shape changes due to the existence of a space in the lower portion, and the space Therefore, even if the outside is sealed with an insulating sealing material such as a resin, it can be easily melted. In addition, by setting the space below the fuse portion large, the withstand voltage can be increased and the extinction distance can be sufficiently secured.

第２の発明に係るヒューズは、第１の発明において、前記ヒューズ部が、前記一対の電極間を横切る断面形状が略波状とされた略波板状に形成されていることを特徴とする。
すなわち、このヒューズでは、ヒューズ部が、一対の電極間を横切る断面形状が略波状とされた略波板状に形成されているので、ヒューズ部全体の剛性が高くなり、外側を封止する際に押し潰されることなく下部に複数の空間を形成することができる。 A fuse according to a second invention is characterized in that, in the first invention, the fuse portion is formed in a substantially corrugated plate shape in which a cross-sectional shape crossing between the pair of electrodes is a substantially wave shape.
That is, in this fuse, the fuse portion is formed in a substantially corrugated plate shape in which the cross-sectional shape across the pair of electrodes is substantially wave-like, so that the rigidity of the fuse portion as a whole becomes high and the outside is sealed. A plurality of spaces can be formed in the lower portion without being crushed.

本発明によれば、以下の効果を奏する。
すなわち、本発明に係るヒューズによれば、中間部と絶縁性基板との間に少なくとも一対の電極間にわたって空間が設けられているので、外側が樹脂等で封止されていても容易に溶断可能となると共に、高耐圧で消孤距離も十分に確保することができる。
したがって、本発明のヒューズでは、高耐圧で小型化が可能になり、特にバッテリーやコンデンサが搭載されたハイブリッドカーや電気自動車等の保護回路用として好適である。 The present invention has the following effects.
That is, according to the fuse of the present invention, since a space is provided between at least a pair of electrodes between the intermediate portion and the insulating substrate, it can be easily blown even if the outside is sealed with resin or the like. At the same time, a high withstand voltage and a sufficient extinction distance can be secured.
Therefore, the fuse of the present invention can be miniaturized with a high withstand voltage, and is particularly suitable for a protective circuit of a hybrid car or an electric vehicle equipped with a battery or a capacitor.

本発明に係るヒューズの一実施形態を示す平面図である。It is a top view which shows one Embodiment of the fuse which concerns on this invention. 図１のＡ−Ａ’断面図である。It is A-A 'sectional drawing of FIG. 図１のＢ−Ｂ’断面図である。It is B-B 'sectional drawing of FIG.

以下、本発明に係るヒューズの一実施形態を、図１から図３を参照しながら説明する。   Hereinafter, an embodiment of a fuse according to the present invention will be described with reference to FIGS.

本実施形態のヒューズシステム１は、図１から図３に示すように、絶縁性基板２と、絶縁性基板２上に形成された一対の電極３と、一対の電極３に両端が接続されたヒューズ部４と、絶縁性基板２上で少なくともヒューズ部４を覆う絶縁性封止材５とを備えている。
上記ヒューズ部４は、前記両端の間の中間部において少なくとも一部が盛り上がって形成され、中間部と絶縁性基板２との間に少なくとも一対の電極３間にわたって空間Ｓが設けられている。 As shown in FIGS. 1 to 3, the fuse system 1 of the present embodiment has an insulating substrate 2, a pair of electrodes 3 formed on the insulating substrate 2, and both ends connected to the pair of electrodes 3. A fuse part 4 and an insulating sealing material 5 covering at least the fuse part 4 on the insulating substrate 2 are provided.
The fuse portion 4 is formed so that at least a part thereof is raised at an intermediate portion between the both ends, and a space S is provided between at least the pair of electrodes 3 between the intermediate portion and the insulating substrate 2.

このヒューズ部４は、一対の電極３間を横切る断面形状が略波状とされた略波板状に形成されている。すなわち、略波板状のヒューズ部４としたことで、中間部と絶縁性基板２との隙間に、一対の電極３を結ぶ方向に延在する複数のトンネル状の空洞（空間Ｓ）が形成されている。なお、上記略波状には、山折りと谷折りとを繰り返した蛇腹形状も含むものである。
ヒューズ部４の材料としては、例えばＡｇ／Ｓｎ／Ｃｕ、Ｓｎ／Ｐｂ、Ａｇ／Ｓｎ、Ａｕ／Ｓｎ／ＣｕまたはＡｕ／Ｓｎ等の低融点合金が採用可能である。 The fuse portion 4 is formed in a substantially corrugated plate shape having a substantially corrugated cross-sectional shape across a pair of electrodes 3. That is, by forming the substantially corrugated plate-like fuse portion 4, a plurality of tunnel-like cavities (spaces S) extending in the direction connecting the pair of electrodes 3 are formed in the gap between the intermediate portion and the insulating substrate 2. Has been. The substantially wave shape includes a bellows shape in which mountain folds and valley folds are repeated.
As a material of the fuse part 4, for example, a low melting point alloy such as Ag / Sn / Cu, Sn / Pb, Ag / Sn, Au / Sn / Cu, or Au / Sn can be employed.

ヒューズ部４は、両端が下部の電極３に押し潰された状態で、はんだ付け、超音波溶接又は圧接されている。なお、ヒューズ部４の両端を下部の電極３に接触させた状態でヒューズ部４の側辺部を接着剤で絶縁性基板２上に固定しても構わない。この場合、ヒューズ部４と電極３とは電気的に接続されているが、互いに接合されていない。   The fuse part 4 is soldered, ultrasonically welded or pressed in a state where both ends are crushed by the lower electrode 3. Note that the side portions of the fuse portion 4 may be fixed on the insulating substrate 2 with an adhesive while both ends of the fuse portion 4 are in contact with the lower electrode 3. In this case, the fuse portion 4 and the electrode 3 are electrically connected, but are not joined to each other.

上記一対の電極３は、例えばメッキ膜、蒸着膜又はスパッタリングにより成膜された金属膜等が採用可能である。例えば、電極３は、Ｃｕのスパッタリングターゲットを用いたスパッタリングによって成膜されたＣｕ膜である。
なお、一対の電極３に両端が接続されていると共に電極３よりも幅狭で細く延在するヒューズ金属膜を、一対の電極３間にパターン形成しても構わない。この場合、ヒューズ金属膜上方のヒューズ部４が溶融した際に、下方のヒューズ金属膜が溶断する。なお、ヒューズ金属膜を採用する際は、ヒューズ部４はヒューズ金属膜の約１０倍の厚さとすることが好ましい。 As the pair of electrodes 3, for example, a plating film, a vapor deposition film, or a metal film formed by sputtering can be employed. For example, the electrode 3 is a Cu film formed by sputtering using a Cu sputtering target.
Note that a fuse metal film having both ends connected to the pair of electrodes 3 and extending narrower and narrower than the electrodes 3 may be patterned between the pair of electrodes 3. In this case, when the fuse part 4 above the fuse metal film is melted, the lower fuse metal film is melted. When the fuse metal film is employed, the fuse portion 4 is preferably about 10 times thicker than the fuse metal film.

上記絶縁性基板２は、例えばＡｌＮ等のセラミックス基板である。
上記絶縁性封止材５は、例えばエポキシ樹脂やシリコーンセメント等が採用可能である。
なお、図１から図３では、一対の電極３が絶縁性封止材５で覆われているが、電極３の一部は絶縁性封止材５の外側まで絶縁性基板２上に延在している図示しない端子用電極に接続されている。 The insulating substrate 2 is a ceramic substrate such as AlN.
As the insulating sealing material 5, for example, epoxy resin, silicone cement, or the like can be used.
1 to 3, the pair of electrodes 3 are covered with the insulating sealing material 5, but a part of the electrodes 3 extends on the insulating substrate 2 to the outside of the insulating sealing material 5. It is connected to a terminal electrode (not shown).

本実施形態のヒューズ１では、一対の電極３間に過電流が流れた場合、抵抗加熱又は発熱によってヒューズ部４が溶融する。この際、溶融したヒューズ部４は、下部に空間Ｓが有ることによって変形し易くなり、中央部を境にして両側の電極３側に向けて分かれて移動することで、溶断する。すなわち、ヒューズ部４の下部の空間Ｓが、溶融時の自由移動空間となることで、容易にヒューズ部４を溶断させることができる。なお、本実施形態のヒューズ１では、絶縁性封止材５によって、耐圧が高くなると共に、電極３間のアークの発生が抑制される若しくは生じたアークが素早く消孤される。   In the fuse 1 of this embodiment, when an overcurrent flows between the pair of electrodes 3, the fuse portion 4 is melted by resistance heating or heat generation. At this time, the melted fuse part 4 is easily deformed due to the space S in the lower part, and is blown out by moving separately toward the electrodes 3 on both sides with the central part as a boundary. That is, since the space S below the fuse portion 4 becomes a free movement space at the time of melting, the fuse portion 4 can be easily blown. In the fuse 1 of this embodiment, the insulating sealing material 5 increases the withstand voltage, and the generation of an arc between the electrodes 3 is suppressed or the generated arc is quickly extinguished.

このように本実施形態のヒューズ１では、中間部と絶縁性基板２との間に少なくとも一対の電極３間にわたって空間Ｓが設けられているので、ヒューズ部４が溶融した際に、下部に空間Ｓが存在することで形状変化して空間Ｓ内で移動し易くなり、外側が絶縁性封止材５で封止されていても容易に溶断可能となる。また、ヒューズ部４下部の空間Ｓを大きく設定することで、耐圧が高くなると共に消孤距離も十分に確保することができる。   Thus, in the fuse 1 of this embodiment, since the space S is provided between at least the pair of electrodes 3 between the intermediate portion and the insulating substrate 2, when the fuse portion 4 is melted, the space is formed in the lower portion. The presence of S makes it easy to move in the space S due to a shape change, and even if the outside is sealed with the insulating sealing material 5, it can be easily blown. In addition, by setting the space S below the fuse portion 4 large, the withstand voltage can be increased and the extinction distance can be sufficiently secured.

また、ヒューズ部４が、一対の電極３間を横切る断面形状が略波状とされた略波板状に形成されているので、ヒューズ部４全体の剛性が高くなり、外側を封止する際に押し潰されることなく下部に複数の空間Ｓを形成することができる。   Further, since the fuse part 4 is formed in a substantially corrugated plate shape in which the cross-sectional shape across the pair of electrodes 3 is substantially corrugated, the rigidity of the fuse part 4 as a whole is increased, and when the outside is sealed A plurality of spaces S can be formed in the lower part without being crushed.

なお、本発明の技術範囲は上記実施形態に限定されるものではなく、本発明の趣旨を逸脱しない範囲において種々の変更を加えることが可能である。
例えば、上記実施形態のようにヒューズ部を略波板状に形成することが好ましいが、中間部を盛り上げて中間部下部に空間を形成する形状であれば他の形状でも構わない。例えば、断面矩形状や断面台形状の略箱型形状や、断面円弧状の略ドーム形状のヒューズ部として中間部の下部に空間を形成しても構わない。 The technical scope of the present invention is not limited to the above embodiment, and various modifications can be made without departing from the spirit of the present invention.
For example, the fuse portion is preferably formed in a substantially corrugated plate shape as in the above embodiment, but other shapes may be used as long as the intermediate portion is raised and a space is formed in the lower portion of the intermediate portion. For example, a space may be formed in the lower part of the intermediate part as a fuse part having a substantially box shape having a rectangular cross section or a trapezoidal cross section or a substantially dome shape having a circular arc cross section.

１…ヒューズ、２…絶縁性基板、３…電極、４…ヒューズ部、５…絶縁性封止材、Ｓ…ヒューズ部下部の空間   DESCRIPTION OF SYMBOLS 1 ... Fuse, 2 ... Insulating substrate, 3 ... Electrode, 4 ... Fuse part, 5 ... Insulating sealing material, S ... Space below fuse part

Claims (2)

絶縁性基板と、
前記絶縁性基板上に形成された一対の電極と、
前記一対の電極に両端が接続されたヒューズ部と、
前記絶縁性基板上で少なくとも前記ヒューズ部を覆う絶縁性封止材とを備え、
前記ヒューズ部が、前記両端の間の中間部において少なくとも一部が盛り上がって形成され、前記中間部と前記絶縁性基板との間に少なくとも前記一対の電極間にわたって空間が設けられていることを特徴とするヒューズ。 An insulating substrate;
A pair of electrodes formed on the insulating substrate;
A fuse portion having both ends connected to the pair of electrodes;
An insulating sealing material covering at least the fuse portion on the insulating substrate;
The fuse portion is formed so that at least a part thereof is raised at an intermediate portion between the both ends, and a space is provided between at least the pair of electrodes between the intermediate portion and the insulating substrate. And fuse. 請求項１に記載のヒューズにおいて、
前記ヒューズ部が、前記一対の電極間を横切る断面形状が略波状とされた略波板状に形成されていることを特徴とするヒューズ。 The fuse of claim 1,
The fuse is characterized in that the fuse portion is formed in a substantially corrugated plate shape in which a cross-sectional shape across the pair of electrodes is substantially a wave shape.
JP2013160518A 2013-08-01 2013-08-01 Fuse Pending JP2015032424A (en)

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JP2013160518A JP2015032424A (en) 2013-08-01 2013-08-01 Fuse
CN201410326925.5A CN104347331A (en) 2013-08-01 2014-07-10 Fuse

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019065727A1 (en) * 2017-09-29 2019-04-04 株式会社村田製作所 Chip-type fuse

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104599917B (en) * 2015-02-14 2017-03-08 南京萨特科技发展有限公司 A kind of protection element
JP6719983B2 (en) * 2015-06-04 2020-07-08 デクセリアルズ株式会社 Fuse element, fuse element, protection element, short-circuit element, switching element

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019065727A1 (en) * 2017-09-29 2019-04-04 株式会社村田製作所 Chip-type fuse
JPWO2019065727A1 (en) * 2017-09-29 2020-07-09 株式会社村田製作所 Chip type fuse
US11211221B2 (en) 2017-09-29 2021-12-28 Murata Manufacturing Co., Ltd. Chip-type fuse

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