WO2019026904A1 - 保護素子 - Google Patents

保護素子 Download PDF

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Publication number
WO2019026904A1
WO2019026904A1 PCT/JP2018/028659 JP2018028659W WO2019026904A1 WO 2019026904 A1 WO2019026904 A1 WO 2019026904A1 JP 2018028659 W JP2018028659 W JP 2018028659W WO 2019026904 A1 WO2019026904 A1 WO 2019026904A1
Authority
WO
WIPO (PCT)
Prior art keywords
tin
electrode
alloys
electrodes
fuse element
Prior art date
Application number
PCT/JP2018/028659
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
慎太郎 中島
Original Assignee
ショット日本株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by ショット日本株式会社 filed Critical ショット日本株式会社
Priority to CN201880039037.1A priority Critical patent/CN110741457B/zh
Priority to KR1020197034414A priority patent/KR102373602B1/ko
Publication of WO2019026904A1 publication Critical patent/WO2019026904A1/ja

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H37/00—Thermally-actuated switches
    • H01H37/74—Switches in which only the opening movement or only the closing movement of a contact is effected by heating or cooling
    • H01H37/76—Contact member actuated by melting of fusible material, actuated due to burning of combustible material or due to explosion of explosive 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
    • H01H85/12—Two or more separate fusible members in parallel
    • 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
    • H01H85/143—Electrical contacts; Fastening fusible members to such contacts
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H5/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection
    • H02H5/04—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection responsive to abnormal temperature

Definitions

  • the present invention relates to a protective element used for an electric device, an electronic device, and the like.
  • a protective circuit of a secondary battery pack for example, a protective element of a surface mount component (SMD) as described in Patent Document 1 (Japanese Patent Laid-Open No. 2015-079608) is suitably used.
  • SMD surface mount component
  • these protective elements detect abnormal states such as excessive heat generation and overvoltage caused by excessive current of the equipment to be protected, or react to abnormal overheating of the ambient temperature, and operate the fuse under predetermined conditions to cut off the electric circuit.
  • the protection element in order to ensure the safety of the device, when the protection circuit detects an abnormality occurring in the device, the resistance element generates heat by the signal current from the protection circuit.
  • the fuse element made of the heat-generating fusible alloy material is fused to shut off the circuit, or the fuse element is fused to cut off the circuit due to an overcurrent.
  • a fuse element material composed of a low melting point metal material melting at soldering temperature and a soluble metal structural material laminated on the low melting point metal material as described in Patent Document 1 etc. is used.
  • a protection element In the fuse element material of this protective element, the low melting point metal material is made to adhere to the solid-phase metal structure material at the temperature by the interfacial tension at the temperature so that the low melting point metal is not melted for a fixed time Support and hold. This maintains the shape of the fuse element at least during the soldering operation to prevent the fuse element material from malfunctioning due to reflow soldering.
  • the metal structure material of the fuse element material is diffused or dissolved in the low melting point metal material which is the medium by the heat of soldering and becomes thin. .
  • the thinned metal structural material easily disappears due to abnormal overheating of the installation environment or heater heating of the built-in resistance heating element, and thereafter operates without interfering with melting.
  • the fuse element used in the protective element it is preferable to use a material with a low electric resistance as much as possible, from the viewpoint of, for example, responding to high current and reducing standby energy loss of the rechargeable battery.
  • the types of fusible metals applicable to the fuse element of the protective element are limited, and it is not always possible to select one having a low electrical resistance value. In practice, in order to ensure practicality such as operation performance, it is often necessary to use a fuse element having a relatively large electric resistance value.
  • the present invention has been proposed to solve the above problems and to improve it, and to provide a protective element capable of reducing the internal resistance value regardless of the specific resistance value of the fuse element material. To aim.
  • an insulating substrate a plurality of electrodes provided on the insulating substrate, and an electrode filling material of low melting point metal filled between at least a pair of electrodes of the electrodes;
  • a fuse element is provided that bridges between the at least one pair of electrodes and covers the top of the electrode filler.
  • the electrode filler is made of a metal material whose melting temperature is equal to or lower than the liquidus temperature of the fuse element.
  • a heating element may be provided on one side of the insulating substrate.
  • the electrode filler is composed of any alloy selected from the group of tin base alloys, tin-lead alloys, tin-copper alloys, tin-silver alloys, and tin-silver-copper alloys. You may
  • the electrode filler is selected from the group consisting of a metal material filled with solder paste, a metal material filled with solder balls, and a metal material filled and formed by partial plating. You may comprise with the metal material of.
  • the fuse element is made of any alloy selected from the group of tin base alloys, tin-lead alloys, tin-copper alloys, tin-silver alloys, and tin-silver-copper alloys. May be
  • the fuse element may be formed of a composite material in which a plurality of metal materials having different compositions are combined.
  • the electrode filling material is provided to fill the gap between the electrodes where the fuse element crosslinks, thereby reducing the internal resistance of the protection element.
  • the gap between the electrodes is a groove-like portion formed of the end surfaces of the pair of opposing electrodes and the insulating substrate surface between them.
  • any metal material may be used if its melting temperature is the same or lower than that of the fuse element.
  • the electrode filler is preferably made of a material having a lower electrical resistance than the fuse element. An example is tin or tin based solder material.
  • the electrode filler fills the gap (hollow space) between the electrodes where the fuse element is bridged.
  • the electrode filler is made of a metal material that is lower than the melting temperature of the fuse element, and therefore does not interfere with the melting operation of the fuse element.
  • fusible metals such as solder can be used as they are, and noble metals such as pure silver and silver alloys (high silver content alloys) may not be used, which is economical.
  • FIG. 1 It is an exploded perspective view of a protection element concerning one embodiment of the present invention.
  • the protection element which concerns on one Embodiment of this invention is shown, (a) is the top view which cut
  • the protective element 10 with the electrode filler includes at least one of an insulating substrate 11, a plurality of electrodes 12 a to 12 g provided on the insulating substrate 11, and the electrodes 12 a to 12 g. Bridging between the at least one pair of electrodes and the electrode filling material 13 of low melting point metal filled between the pair of electrodes, for example between the electrodes 12a and 12b and between the electrodes 12b and 12c;
  • the fuse element 14 covers the top of the electrode filler 13, the operation flux (not shown) applied to the surface of the fuse element 14, and the cover 15 covering the operation flux and the top of the fuse element 14.
  • the electrode filler 13 is made of a metal material whose melting temperature is equal to or lower than the liquidus temperature of the fuse element 14.
  • the insulating substrate 11 may be made of any material and composition as long as it is an insulating material.
  • a material of the insulating substrate 11 for example, plastic, glass, glass ceramic, ceramic and the like are preferable.
  • the electrode 12 provided on the insulating substrate 11 may be of any material or composition as long as it is a conductive material.
  • a material of the electrode 12 for example, copper, silver, a copper alloy, and a silver alloy are suitable.
  • the electrode filler 13 can be formed so as to be filled in the gap between the electrode 12a and the electrode 12b and the gap between the electrode 12b and the electrode 12c, and any metal material whose melting temperature is equal to or lower than that of the fuse element 14 It may be of materials and compositions.
  • the electrode filler 13 is, for example, a metal material in which a solder paste consisting of tin-based alloy, tin-lead alloy, tin-copper alloy, tin-silver alloy, tin-silver-copper alloy is formed, tin-based alloy, Metal material filled with solder balls consisting of tin-lead alloy, tin-copper alloy, tin-silver alloy, tin-silver-copper alloy, tin base alloy, tin-lead alloy, tin-copper alloy, tin-silver A metal material filled and formed by partial plating of an alloy or tin-silver-copper alloy may be used.
  • the electrode filler 13 can be integrated with the fuse element 14 along with the surface mounting of the protective element 10. When the fuse element 14 is fused, the electrode filling material 13 does not interfere with the fusing operation since it is spheroidized together with the liquid phased fuse element 14.
  • the fuse element 14 may be of any material and composition as long as it is a fusible metal material.
  • a tin-based alloy, a tin-lead alloy, a tin-copper alloy, a tin-silver alloy, a tin-silver-copper alloy, etc. can be suitably used.
  • the fuse element 14 may use a metal material of a single composition, or may be used as a composite material by combining a plurality of metal materials having different compositions.
  • a heating element may be provided on one side of the insulating substrate 11 as necessary.
  • the heating element is provided with an insulating coating as required.
  • the central electrode 12b connected to the fuse element 14 among the electrodes 12a, 12b and 12c may be omitted.
  • the lid 15 only needs to cover the upper portions of the insulating substrate 11 and the fuse element 14 to secure a desired space, and the shape and the material of the lid 15 are not limited.
  • a dome-shaped resin film cover, a plastic lid, a ceramic lid or the like can be suitably used as the lid 15.
  • the protective element 20 with an electrode filler of Example 1 has an insulating substrate 21 made of alumina ceramic.
  • the insulating substrate 21 is provided with a plurality of silver alloy electrodes 22a to 22g.
  • a resistive heating element 26 electrically connected to the electrode 22 f and the electrode 22 h is provided on the lower surface of the insulating substrate 21.
  • the electrodes 22a to 22g among the three electrodes 22a, 22b and 22c, that is, between the electrodes 22a and 22b and between the electrodes 22b and 22c, the electrodes are filled with 96.5 Sn-3Ag-0.5Cu alloy.
  • the material 23 is filled.
  • the fuse element 24 is made of a clad material of 92Pb-Sn alloy 24a and 99.3Sn-0.7Cu alloy 24b so as to bridge between the three electrodes 22a, 22b, 22c and cover the upper part of the electrode filling material 23. It is provided.
  • a lid 25 made of liquid crystal polymer is provided to cover the operating flux (not shown) applied to the surface of the fuse element 24 and the upper portion of the operating flux and the fuse element 24.
  • the electrode filler 23 is made of a metal material whose melting temperature is equal to or lower than the liquidus temperature of the fuse element 24. Between the electrode 22a and the electrode 22e, between the electrode 22b and the electrode 22f, between the electrode 22c and the electrode 22g, and between the electrode 22d and the electrode 22h, electrically connected by half through holes of silver alloy There is.
  • Overglaze of insulating glass is applied to the surface of the resistance heating element 26 of the first embodiment.
  • parts and members common to those of Example 1 are used to prepare a protective element of a comparative example in which the electrode filler is not provided.
  • the internal resistance value was measured. While the internal resistance value of the protective element 20 with the electrode filler of Example 1 was 0.45 m ⁇ (corresponding to the rated current 25 A), the internal resistance value of the protective element of the comparative example without the electrode filler was 0.60 m ⁇ (corresponding to a rated current of 20 A). It can be seen that the internal resistance of the protection element is reduced by the structure of the present embodiment, whereby the rated current value is also improved.
  • the conductive path may be maintained.
  • the protective element with an electrode filler according to the present invention can be mounted on a circuit board to be protected together with other surface mounted components, and is collectively soldered and mounted by a reflow method or the like to be used as a protective device for secondary batteries such as battery packs. it can.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Fuses (AREA)
PCT/JP2018/028659 2017-08-01 2018-07-31 保護素子 WO2019026904A1 (ja)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN201880039037.1A CN110741457B (zh) 2017-08-01 2018-07-31 保护元件
KR1020197034414A KR102373602B1 (ko) 2017-08-01 2018-07-31 보호 소자

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2017-148897 2017-08-01
JP2017148897A JP6912314B2 (ja) 2017-08-01 2017-08-01 保護素子

Publications (1)

Publication Number Publication Date
WO2019026904A1 true WO2019026904A1 (ja) 2019-02-07

Family

ID=65232710

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2018/028659 WO2019026904A1 (ja) 2017-08-01 2018-07-31 保護素子

Country Status (5)

Country Link
JP (1) JP6912314B2 (zh)
KR (1) KR102373602B1 (zh)
CN (1) CN110741457B (zh)
TW (1) TWI676202B (zh)
WO (1) WO2019026904A1 (zh)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2020140845A (ja) * 2019-02-28 2020-09-03 ショット日本株式会社 保護素子

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP7340979B2 (ja) 2019-07-22 2023-09-08 デクセリアルズ株式会社 保護素子および保護回路
TWI820279B (zh) * 2019-12-26 2023-11-01 日商迪睿合股份有限公司 保護元件及電池組

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005505110A (ja) * 2001-10-03 2005-02-17 メタラー テクノロジーズ インターナショナル エス．アー． ヒューズ要素及びその製造方法
US20090189730A1 (en) * 2008-01-30 2009-07-30 Littelfuse, Inc. Low temperature fuse
JP2015053271A (ja) * 2009-09-04 2015-03-19 乾坤科技股▲ふん▼有限公司 保護装置

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE112012004855T5 (de) * 2011-11-22 2014-09-11 Nec Schott Components Corporation Temperatursicherung und Schleifelektrode verwendet für eine Temperatursicherung
JP6364243B2 (ja) * 2013-08-07 2018-07-25 デクセリアルズ株式会社 保護素子及びバッテリパック
JP2015079608A (ja) 2013-10-16 2015-04-23 エヌイーシー ショット コンポーネンツ株式会社 保護素子用ヒューズエレメント材およびそれを利用した回路保護素子
JP6381980B2 (ja) * 2014-06-11 2018-08-29 デクセリアルズ株式会社 スイッチ素子及びスイッチ回路

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005505110A (ja) * 2001-10-03 2005-02-17 メタラー テクノロジーズ インターナショナル エス．アー． ヒューズ要素及びその製造方法
US20090189730A1 (en) * 2008-01-30 2009-07-30 Littelfuse, Inc. Low temperature fuse
JP2015053271A (ja) * 2009-09-04 2015-03-19 乾坤科技股▲ふん▼有限公司 保護装置

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2020140845A (ja) * 2019-02-28 2020-09-03 ショット日本株式会社 保護素子
JP7050019B2 (ja) 2019-02-28 2022-04-07 ショット日本株式会社 保護素子

Also Published As

Publication number Publication date
KR102373602B1 (ko) 2022-03-14
TWI676202B (zh) 2019-11-01
JP2019029244A (ja) 2019-02-21
CN110741457A (zh) 2020-01-31
CN110741457B (zh) 2022-06-07
JP6912314B2 (ja) 2021-08-04
TW201921398A (zh) 2019-06-01
KR20190141719A (ko) 2019-12-24

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