TW202118132A - Protection element and battery pack - Google Patents

Protection element and battery pack Download PDF

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Publication number
TW202118132A
TW202118132A TW109129580A TW109129580A TW202118132A TW 202118132 A TW202118132 A TW 202118132A TW 109129580 A TW109129580 A TW 109129580A TW 109129580 A TW109129580 A TW 109129580A TW 202118132 A TW202118132 A TW 202118132A
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housing
fitting
protection element
slot
adhesive
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TW109129580A
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Chinese (zh)
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木村裕二
小森千智
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日商迪睿合股份有限公司
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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
    • H01H85/041—Fuses, i.e. expendable parts of the protective device, e.g. cartridges characterised by the type
    • H01H85/046—Fuses formed as printed circuits
    • 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
    • H01H37/761—Contact member actuated by melting of fusible material, actuated due to burning of combustible material or due to explosion of explosive material with a fusible element forming part of the switched circuit
    • 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
    • H01H85/165—Casings
    • H01H85/175—Casings characterised by the casing shape or form
    • 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
    • H01H85/08—Fusible members characterised by the shape or form of the fusible member
    • H01H85/11—Fusible members characterised by the shape or form of the fusible member with applied local area of a metal which, on melting, forms a eutectic with the main material of the fusible member, i.e. M-effect devices
    • 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
    • H01H85/165—Casings
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/44—Methods for charging or discharging
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/572—Means for preventing undesired use or discharge
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/572—Means for preventing undesired use or discharge
    • H01M50/574—Devices or arrangements for the interruption of current
    • H01M50/583—Devices or arrangements for the interruption of current in response to current, e.g. fuses
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
    • H02H7/18—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for batteries; for accumulators
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • 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
    • H01H85/46—Circuit arrangements not adapted to a particular application of the protective device
    • H01H2085/466—Circuit arrangements not adapted to a particular application of the protective device with remote controlled forced fusing
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H61/00—Electrothermal relays
    • H01H61/02—Electrothermal relays wherein the thermally-sensitive member is heated indirectly, e.g. resistively, inductively
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Combustion & Propulsion (AREA)
  • Power Engineering (AREA)
  • Fuses (AREA)
  • Battery Mounting, Suspending (AREA)
  • Connection Of Batteries Or Terminals (AREA)
  • Protection Of Static Devices (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)
  • Secondary Cells (AREA)

Abstract

Provided is a protection element in which excess adhesive between fitting projections and fitting recesses is eliminated to reliably ensure the bonding strength between a lower case and an upper case. The present invention includes: a fusible conductor 3; and a housing 6 having a lower case 4 and an upper case 5, the upper case 5 and the lower case 4 being bonded together with an adhesive to form the housing 6, wherein either the upper case 5 or the lower case 4 is provided with fitting recesses 25, the other is provided with fitting projections 26 to fit into the fitting recesses 25, and slits 27 continuous with the fitting recesses 25 and extending along a plane where the upper case 5 and the lower case 4 are in contact with each other are formed to allow an adhesive 19 to flow therethrough.

Description

保護元件、電池組Protection element, battery pack

本發明係關於一種遮斷電流路徑之保護元件、及使用其之電池組。本發明申請案係以於日本於2019年8月29日申請之日本專利申請案編號日本發明專利申請2019-157431為基礎而主張其優先權者，該發明申請案藉由被參照而援用於本發明申請案。The present invention relates to a protection element that interrupts the current path, and a battery pack using the protection element. This invention application is based on the Japanese patent application number Japanese invention patent application 2019-157431 filed in Japan on August 29, 2019, and claims its priority. The invention application is hereby incorporated by reference. Invention application.

多數之能夠充電而重複利用之二次電池被加工為電池組而提供給使用者。尤其是在重量能量密度較高之鋰離子二次電池中，為了確保使用者及電子機器之安全，一般而言，將過充電保護、過放電保護等若干個保護電路內置於電池組，具有於特定之情形下遮斷電池組之輸出之功能。Most secondary batteries that can be recharged and reused are processed into battery packs and provided to users. Especially in lithium-ion secondary batteries with high weight energy density, in order to ensure the safety of users and electronic equipment, in general, several protection circuits such as overcharge protection and overdischarge protection are built into the battery pack. The function of blocking the output of the battery pack under certain circumstances.

於多數之使用鋰離子二次電池之電子裝置中，藉由使用內置於電池組之FET開關進行輸出之導通/關斷，而進行電池組之過充電保護或過放電保護動作。然而，在因某種原因，FET開關發生短路破壞之情形下、在被施加雷電突波等，流通瞬間性大電流之情形下、或在因電池單元之壽命，而輸出電壓異常降低、或相反輸出過大異常電壓之情形下，亦必須保護電池組及電子機器免受起火等事故之害。因而，為了於此可能設想到之任意之異常狀態下，亦安全地遮斷電池單元之輸出，而使用包含具有藉由來自外部之信號遮斷電流路徑之功能之保險絲元件之保護元件。In most electronic devices using lithium-ion secondary batteries, the overcharge protection or overdischarge protection of the battery pack is performed by using the FET switch built in the battery pack to turn on/off the output. However, in the case of short-circuit destruction of the FET switch for some reason, in the case where a large instantaneous current is applied such as a lightning surge, or the output voltage is abnormally lowered due to the life of the battery cell, or vice versa In the case of excessive abnormal voltage output, the battery pack and electronic equipment must also be protected from fire and other accidents. Therefore, in order to safely interrupt the output of the battery cell even under any abnormal conditions that may be conceived here, a protection element including a fuse element with the function of interrupting the current path by a signal from the outside is used.

作為面向此鋰離子二次電池等之保護電路之保護元件，使用在保護元件內部具有發熱體，藉由該發熱體之發熱，將電流路徑上之可熔導體熔斷之構造。 [先前技術文獻] [專利文獻]As a protection element for the protection circuit of the lithium ion secondary battery, etc., a structure is used that has a heating element inside the protection element, and the fusible conductor in the current path is fused by the heating of the heating element. [Prior Technical Literature] [Patent Literature]

專利文獻1：日本特開2015-53260號公報Patent Document 1: Japanese Patent Application Publication No. 2015-53260

[發明所欲解決之問題][The problem to be solved by the invention]

鋰離子二次電池之用途近年來擴大，業界曾探討更大電流之用途，例如採用至電動螺絲刀等電動工具、或混合動力車、電動車、電動輔助自行車等輸送機器，部分採用已開始。於該等用途中，尤其是於啟動時等，有流通如超過數10 A～100 A之大電流之情形。較理想為實現應對此大電流容量之保護元件。The use of lithium-ion secondary batteries has expanded in recent years. The industry has explored the use of higher currents, such as the use of electric tools such as electric screwdrivers, or conveying equipment such as hybrid vehicles, electric vehicles, and electric assisted bicycles. Part of the adoption has begun. In these applications, especially when starting, etc., there are cases where a large current exceeding several 10 A to 100 A flows. It is more ideal to realize a protection element that can cope with this large current capacity.

為了實現應對此大電流之保護元件，曾提案使用使剖面積增大之可熔導體，於該可熔導體之正面，連接形成有發熱體之絕緣基板之保護元件。In order to realize a protection element for this large current, it has been proposed to use a soluble conductor whose cross-sectional area is increased, and to connect a protection element of an insulating substrate formed with a heating element on the front surface of the soluble conductor.

圖26、圖27、圖28、圖29係顯示設想大電流用途之保護元件之一構成例之圖。圖26係外觀立體圖，圖27係俯視圖，圖28係圖27之D-D’剖視圖，圖29係省略上側外殼而顯示之俯視圖。圖26～圖29所示之保護元件100藉由在與電池之充放電電路等外部電路連接之第1、第2外部連接端子101、102間連接可熔導體103，而構成該外部電路之一部分，於過電壓等異常時，藉由可熔導體103熔融，而遮斷第1外部連接端子101與第2外部連接端子102之間之電流路徑。Fig. 26, Fig. 27, Fig. 28, and Fig. 29 are diagrams showing a configuration example of a protection element that is supposed to be used for high current. Fig. 26 is a perspective view of the appearance, Fig. 27 is a plan view, Fig. 28 is a cross-sectional view taken along the line D-D' of Fig. 27, and Fig. 29 is a plan view showing the upper case omitted. The protection element 100 shown in FIGS. 26-29 constitutes a part of the external circuit by connecting a soluble conductor 103 between the first and second external connection terminals 101, 102 connected to the external circuit such as the battery charging and discharging circuit. In the event of an abnormality such as overvoltage, the soluble conductor 103 is melted to block the current path between the first external connection terminal 101 and the second external connection terminal 102.

保護元件100具備：絕緣基板105；第1、第2外部連接端子101、102，其等與外部電路連接；2個發熱體106，其等排列於絕緣基板105之正面；絕緣層107，其被覆發熱體106；正面電極108，其積層於絕緣層107上，且與發熱體106連接；及可熔導體103，其跨於第1外部連接端子101、正面電極108、及第2外部連接端子102經由銲膏而搭載。The protection element 100 includes: an insulating substrate 105; first and second external connection terminals 101, 102 which are connected to an external circuit; two heating elements 106 arranged on the front surface of the insulating substrate 105; and an insulating layer 107, which is covered The heating element 106; the front electrode 108, which is laminated on the insulating layer 107 and connected to the heating element 106; and the soluble conductor 103, which spans the first external connection terminal 101, the front electrode 108, and the second external connection terminal 102 Mounted via solder paste.

保護元件100藉由第1、第2外部連接端子101、102跨於元件殼體之內外而配設，且藉由螺固等連接於設置於供保護元件100安裝之外部電路基板之連接電極，而將可熔導體103組裝入形成於外部電路基板上之電流路徑之一部分。The protection element 100 is arranged by the first and second external connection terminals 101, 102 spanning the inside and outside of the element case, and is connected to the connection electrode provided on the external circuit board on which the protection element 100 is installed by screwing or the like, The soluble conductor 103 is assembled into a part of the current path formed on the external circuit board.

發熱體106係具有電阻值較高且當通電時發熱之導電性之構件，包含例如鎳鉻合金、W、Mo、Ru等或包含其等之材料。又，發熱體106與形成於絕緣基板105之正面上之發熱體饋電電極109連接。發熱體饋電電極109經由銲膏與第3外部連接端子110連接。保護元件100藉由第3外部連接端子110連接於設置於供保護元件100安裝之外部電路基板之連接電極，而將發熱體106與設置於外部電路之外部電源連接。而且，發熱體106係由未圖示之開關元件等常時控制通電及發熱。The heating element 106 is a conductive member that has a high resistance value and generates heat when energized, and includes, for example, nickel-chromium alloy, W, Mo, Ru, etc. or materials containing them. In addition, the heating element 106 is connected to the heating element feeding electrode 109 formed on the front surface of the insulating substrate 105. The heating element power feeding electrode 109 is connected to the third external connection terminal 110 via a solder paste. The protection element 100 is connected to a connection electrode provided on an external circuit board on which the protection element 100 is mounted via the third external connection terminal 110, thereby connecting the heating element 106 to an external power supply provided in an external circuit. In addition, the heating element 106 is constantly controlled for energization and heat generation by a switching element, etc., not shown.

發熱體106由包含玻璃層等之絕緣層107被覆，且於絕緣層107上形成正面電極108，藉此介隔著絕緣層107重疊正面電極108。又，於正面電極108上，經由銲膏連接跨於第1、第2外部連接端子101、102間連接之可熔導體103。The heating element 106 is covered with an insulating layer 107 including a glass layer or the like, and a front electrode 108 is formed on the insulating layer 107, thereby overlapping the front electrode 108 with the insulating layer 107 interposed therebetween. In addition, on the front electrode 108, the soluble conductor 103 connected across the first and second external connection terminals 101 and 102 is connected via solder paste.

藉此，保護元件100之發熱體106與可熔導體103藉由重疊而熱性連接，若發熱體106藉由通電而發熱，則可將可熔導體103熔斷。Thereby, the heating element 106 of the protection element 100 and the soluble conductor 103 are thermally connected by overlapping, and if the heating element 106 generates heat by energizing, the soluble conductor 103 can be fused.

可熔導體103係由無Pb焊料等低熔點金屬、或Ag、Cu或以其等為主成分之合金等高熔點金屬形成，或具有低熔點金屬與高熔點金屬之積層構造。而且，可熔導體103藉由自第1外部連接端子101跨於正面電極108直到第2外部連接端子102而連接，而構成組裝有保護元件100之外部電路之電流路徑之一部分。而且，可熔導體103藉由因流通超過額定之電流，自發熱(焦耳熱)，而熔斷，或因發熱體106之發熱而熔斷，將第1、第2外部連接端子101、102間予以遮斷。The soluble conductor 103 is formed of a low melting point metal such as Pb-free solder, or a high melting point metal such as Ag, Cu, or an alloy containing them as a main component, or has a laminated structure of a low melting point metal and a high melting point metal. Furthermore, the soluble conductor 103 is connected across the front electrode 108 from the first external connection terminal 101 to the second external connection terminal 102 to constitute a part of the current path of the external circuit in which the protection element 100 is incorporated. In addition, the soluble conductor 103 is fused by self-heating (Joule heat) due to the flow of current exceeding the rated current, or fused due to the heat of the heating element 106, thereby shielding the space between the first and second external connection terminals 101 and 102 Off.

而且，保護元件100當產生遮斷外部電路之電流路徑之需要時，藉由開關元件，向發熱體106通電。藉此，保護元件100之發熱體106發熱至高溫，將組裝入外部電路之電流路徑上之可熔導體103熔融。可熔導體103之熔融導體藉由朝潤濕性較高之正面電極108及第1、第2外部連接端子101、102拉近，而將可熔導體103熔斷。因而，保護元件100使第1外部連接端子101～正面電極108～第2外部連接端子102之間熔斷，可遮斷外部電路之電流路徑。In addition, when the protection element 100 needs to interrupt the current path of the external circuit, the heating element 106 is energized by the switching element. Thereby, the heating element 106 of the protection element 100 heats up to a high temperature, and the soluble conductor 103 assembled in the current path of the external circuit is melted. The fused conductor of the soluble conductor 103 is drawn closer to the front electrode 108 with higher wettability and the first and second external connection terminals 101 and 102, so that the soluble conductor 103 is fused. Therefore, the protection element 100 melts between the first external connection terminal 101 to the front electrode 108 to the second external connection terminal 102, and can block the current path of the external circuit.

保護元件100如圖30所示般，具有下側外殼111、及上側外殼112，該等下側外殼111與上側外殼112藉由被接合，而構成保護元件100之殼體113。此外，圖30係顯示殼體113之圖，(A)係上側外殼112之仰視圖，(B)係下側外殼111及上側外殼112之剖視圖，(C)係下側外殼111之俯視圖。下側外殼111支持絕緣基板105、及第1、第2外部連接端子101、102。上側外殼112具有收容上述之元件內部構成之空間。As shown in FIG. 30, the protection element 100 has a lower housing 111 and an upper housing 112. The lower housing 111 and the upper housing 112 are joined to form the housing 113 of the protection element 100. 30 is a diagram showing the housing 113, (A) is a bottom view of the upper housing 112, (B) is a cross-sectional view of the lower housing 111 and the upper housing 112, and (C) is a plan view of the lower housing 111. The lower case 111 supports the insulating substrate 105 and the first and second external connection terminals 101 and 102. The upper housing 112 has a space for accommodating the internal components of the above-mentioned components.

下側外殼111於各轉角部形成嵌合凸部114。又，上側外殼112於各轉角部形成與嵌合凸部114嵌合之嵌合凹部115。於形成殼體113時，如圖31所示，對下側外殼111之包含嵌合凸部114之側緣部供給接著劑120，且與上側外殼112對接。藉此，將嵌合凸部114與嵌合凹部115經由接著劑120嵌合，將下側外殼111與上側外殼112接合。The lower housing 111 has a fitting convex portion 114 formed at each corner portion. In addition, the upper housing 112 is formed with a fitting concave portion 115 to be fitted with the fitting convex portion 114 at each corner portion. When the housing 113 is formed, as shown in FIG. 31, the adhesive 120 is supplied to the side edge portion of the lower housing 111 including the fitting convex portion 114 and is butted with the upper housing 112. Thereby, the fitting convex part 114 and the fitting concave part 115 are fitted via the adhesive 120, and the lower housing 111 and the upper housing 112 are joined.

此處，保護元件100為了應對大電流用途，而如上述般謀求可熔導體103之大型化、及發熱體106之發熱量之增加。然而，由於伴隨於此，可熔導體103之熔斷時之熱衝擊亦變大，且外殼內部之空氣急劇膨脹，故對殼體113要求承受該壓力之接合強度。為了提高下側外殼111與上側外殼112之接合強度，而考量增加接著劑120之量，但若增加接著劑120，則在嵌合時向嵌合凹部115流入之量增加。又，沿嵌合凸部114，接著劑亦進入與嵌合凹部115之間。Here, in order to cope with high-current applications, the protection element 100 seeks to increase the size of the soluble conductor 103 and the heat generation amount of the heating element 106 as described above. However, due to this, the thermal shock at the time of fusing of the soluble conductor 103 also increases, and the air inside the housing expands rapidly, so the housing 113 is required to have a bonding strength to withstand the pressure. In order to improve the bonding strength between the lower housing 111 and the upper housing 112, the amount of the adhesive 120 is considered to be increased. However, if the adhesive 120 is increased, the amount of flowing into the fitting recess 115 during fitting increases. In addition, along the fitting convex portion 114, the adhesive also enters between the fitting concave portion 115 and the fitting convex portion 114.

因而，如圖32所示，在使下側外殼111與上側外殼112對接時，無流入嵌合凸部114與嵌合凹部115之間之接著劑120之溢出位置，反而阻礙下側外殼111與上側外殼112之密接。因此，成為上側外殼112自下側外殼111浮起之狀態，有產生在未獲得所期望之接著強度下，上側外殼112於可熔導體103之熔斷時脫開、或無法滿足特定之殼體之高度條件等不良情況之虞。Therefore, as shown in FIG. 32, when the lower housing 111 and the upper housing 112 are butted, there is no overflow position of the adhesive 120 flowing between the fitting convex portion 114 and the fitting concave portion 115, and instead hinders the lower housing 111 and The close connection of the upper housing 112. Therefore, the upper housing 112 is in a floating state from the lower housing 111. When the desired bonding strength is not obtained, the upper housing 112 may be detached when the soluble conductor 103 is fused, or it may not meet the requirements of the specific housing. The risk of bad conditions such as high altitude conditions.

因而，本發明之目的在於提供一種能夠排除嵌合凸部與嵌合凹部之間之接著劑之多餘部分，確實地確保下側外殼與上側外殼之接著強度之保護元件、及使用其之電池組。 [解決問題之技術手段]Therefore, the object of the present invention is to provide a protective element that can eliminate the excess part of the adhesive between the fitting convex portion and the fitting concave portion, and reliably ensure the bonding strength between the lower shell and the upper shell, and a battery pack using the same. . [Technical means to solve the problem]

為了解決上述之問題，本發明之保護元件具備：可熔導體；及殼體，其具有下側外殼及上側外殼，藉由將上述上側外殼及上述下側外殼以接著劑接合而形成；於上述上側外殼及上述下側外殼之任一者形成有嵌合凹部，於任另一者形成有嵌合於上述嵌合凹部之嵌合凸部，且形成有狹槽，該狹槽與上述嵌合凹部連續且延伸於上述上側外殼及上述下側外殼之對接面，使上述接著劑流動。In order to solve the above-mentioned problems, the protection element of the present invention includes: a soluble conductor; and a casing having a lower casing and an upper casing, formed by joining the upper casing and the lower casing with an adhesive; Either one of the upper housing and the lower housing is formed with a fitting concave portion, and either the other is formed with a fitting convex portion to be fitted into the fitting concave portion, and a slot is formed with the fitting The concave portion is continuous and extends on the abutting surface of the upper shell and the lower shell to allow the adhesive to flow.

為了解決上述之問題，本發明之保護元件具備：可熔導體；及殼體，其具有下側外殼及上側外殼，藉由將上述上側外殼及上述下側外殼以接著劑接合而形成；於上述上側外殼及上述下側外殼之任一者形成有嵌合凹部，於任另一者形成有嵌合於上述嵌合凹部之嵌合凸部；上述嵌合凸部於外周面形成有使上述接著劑流動之狹槽。In order to solve the above-mentioned problems, the protection element of the present invention includes: a soluble conductor; and a casing having a lower casing and an upper casing, formed by joining the upper casing and the lower casing with an adhesive; Either one of the upper housing and the lower housing is formed with a fitting concave portion, and either is formed with a fitting convex portion fitted into the fitting concave portion; the fitting convex portion is formed on the outer peripheral surface so that the adhesive Slot for agent flow.

為了解決上述之問題，本發明之保護元件具備：可熔導體；及殼體，其具有下側外殼及上側外殼，藉由將上述上側外殼及上述下側外殼以接著劑接合而形成；於上述上側外殼及上述下側外殼之任一者形有成嵌合凹部，於任另一者形成有嵌合於上述嵌合凹部之嵌合凸部，且形成有狹槽，該狹槽與上述嵌合凹部連續且延伸於上述上側外殼及上述下側外殼之對接面，使上述接著劑流動；上述嵌合凸部於外周面形成有使上述接著劑流動之狹槽。In order to solve the above-mentioned problems, the protection element of the present invention includes: a soluble conductor; and a casing having a lower casing and an upper casing, formed by joining the upper casing and the lower casing with an adhesive; Either one of the upper housing and the lower housing is formed with a fitting concave portion, and either the other is formed with a fitting convex portion fitted into the fitting concave portion, and a slot is formed, and the slot is formed with the fitting concave portion. The joint concave portion is continuous and extends on the abutting surface of the upper shell and the lower shell to allow the adhesive to flow; the fitting convex portion is formed with a slot for the adhesive to flow on the outer peripheral surface.

又，本發明之電池組具備：1個以上之電池單元；及保護元件，其連接於上述電池單元之充放電路徑上，遮斷該充放電路徑；且上述保護元件具備：可熔導體；及殼體，其具有下側外殼及上側外殼，藉由將上述上側外殼及上述下側外殼以接著劑接合而形成；於上述上側外殼及上述下側外殼之任一者形成有嵌合凹部，於任另一者形成有嵌合於上述嵌合凹部之嵌合凸部，且形成有狹槽，該狹槽與上述嵌合凹部連續且延伸於上述上側外殼及上述下側外殼之對接面，使上述接著劑流動。In addition, the battery pack of the present invention includes: one or more battery cells; and a protection element connected to the charge and discharge path of the battery cell to block the charge and discharge path; and the protection element includes: a soluble conductor; and A housing having a lower housing and an upper housing, formed by joining the upper housing and the lower housing with an adhesive; a fitting recess is formed in any one of the upper housing and the lower housing, and Either one is formed with a fitting convex portion to be fitted into the fitting concave portion, and is formed with a slit that is continuous with the fitting concave portion and extends on the abutting surface of the upper housing and the lower housing, so that The above-mentioned adhesive flows.

又，本發明之電池組具備：1個以上之電池單元；及保護元件，其連接於上述電池單元之充放電路徑上，遮斷該充放電路徑；且上述保護元件具備：可熔導體；及殼體，其具有下側外殼及上側外殼，藉由將上述上側外殼及上述下側外殼以接著劑接合而形成；於上述上側外殼及上述下側外殼之任一者形成有嵌合凹部，於任另一者形成有嵌合於上述嵌合凹部之嵌合凸部；上述嵌合凸部形成有使上述接著劑沿突出方向流動之狹槽。In addition, the battery pack of the present invention includes: one or more battery cells; and a protection element connected to the charge and discharge path of the battery cell to block the charge and discharge path; and the protection element includes: a soluble conductor; and A housing having a lower housing and an upper housing, formed by joining the upper housing and the lower housing with an adhesive; a fitting recess is formed in any one of the upper housing and the lower housing, and Either one is formed with a fitting convex part which is fitted into the fitting concave part; and the fitting convex part is formed with a slit for allowing the adhesive to flow in the protruding direction.

又，本發明之電池組具備：1個以上之電池單元；及保護元件，其連接於上述電池單元之充放電路徑上，遮斷該充放電路徑；且上述保護元件具備：可熔導體；及殼體，其具有下側外殼及上側外殼，藉由將上述上側外殼及上述下側外殼以接著劑接合而形成；於上述上側外殼及上述下側外殼之任一者形成有嵌合凹部，於任另一者形成有嵌合於上述嵌合凹部之嵌合凸部，且形成有狹槽，該狹槽與上述嵌合凹部連續且延伸於上述上側外殼及上述下側外殼之對接面，使上述接著劑流動；上述嵌合凸部形成有使上述接著劑沿突出方向流動之狹槽。 [發明之效果]In addition, the battery pack of the present invention includes: one or more battery cells; and a protection element connected to the charge and discharge path of the battery cell to block the charge and discharge path; and the protection element includes: a soluble conductor; and A housing having a lower housing and an upper housing, formed by joining the upper housing and the lower housing with an adhesive; a fitting recess is formed in any one of the upper housing and the lower housing, and Either one is formed with a fitting convex portion to be fitted into the fitting concave portion, and is formed with a slit that is continuous with the fitting concave portion and extends on the abutting surface of the upper housing and the lower housing, so that The adhesive flows; the fitting convex portion is formed with a slit that allows the adhesive to flow in a protruding direction. [Effects of Invention]

根據本發明，狹槽藉由在使上側外殼及下側外殼對接時，使填充於嵌合凹部內之接著劑之多餘部分流動至內部，而防止使接著劑之多餘部分滯留於與嵌合凸部嵌合之嵌合凹部內。藉此，可防止由滯留於嵌合凹部內之接著劑之多餘部分，阻礙上側外殼及下側外殼之密接。According to the present invention, the slot allows the excess part of the adhesive filled in the fitting recess to flow to the inside when the upper shell and the lower shell are butted, thereby preventing the excess part of the adhesive from staying in the fitting convex In the recessed part of the fitting. Thereby, it is possible to prevent the excess part of the adhesive staying in the fitting recess from obstructing the close contact between the upper shell and the lower shell.

以下，針對應用本發明之保護元件、電池組，一面參照圖式，一面詳細地說明。此外，本發明並非僅限定於以下之實施形態者，當得在不脫離本發明之要旨之範圍內進行各種變更。又，圖式係示意性圖式，各尺寸之比例等有與實際者不同之情形。具體的尺寸等應該參酌以下之說明而加以判斷。又，在圖式相互間當亦含有彼此之尺寸之關係或比例不同之部分。Hereinafter, the protection element and battery pack to which the present invention is applied will be described in detail while referring to the drawings. In addition, the present invention is not limited only to the following embodiments, and various changes should be made without departing from the gist of the present invention. In addition, the drawing is a schematic drawing, and the ratio of each size may be different from the actual one. The specific dimensions should be judged with reference to the following description. In addition, between the drawings, there should also be parts with different dimensions or ratios.

[第1實施之形態：嵌合凹部狹槽] 於圖1、圖2、圖3中顯示應用本發明之保護元件1。保護元件1具備：絕緣基板2；可熔導體3，其搭載於絕緣基板2之正面；及殼體6，其具有支持絕緣基板2之背面的下側外殼4、及覆蓋絕緣基板2之正面的上側外殼5，藉由將下側外殼4與上側外殼5以接著劑19接合，而收納絕緣基板2。又，保護元件1具有第1、第2外部連接端子7、8。第1、第2外部連接端子7、8跨於殼體6之內外而配設，藉由螺固等而連接於設置在供保護元件1安裝之外部電路的連接電極。第1、第2外部連接端子7、8由下側外殼4支持，且各一端藉由可熔導體3而連接。而且，保護元件1因經由第1、第2外部連接端子7、8而組入外部電路，從而可熔導體3構成該外部電路之電流路徑之一部分，藉由後述之發熱體10發熱、或超過額定之過電流而熔斷，而可遮斷電流路徑。[The form of the first embodiment: the slot of the fitting recess] The protection element 1 to which the present invention is applied is shown in FIG. 1, FIG. 2, and FIG. 3. The protective element 1 includes: an insulating substrate 2; a soluble conductor 3 mounted on the front surface of the insulating substrate 2; and a housing 6 having a lower case 4 supporting the back surface of the insulating substrate 2 and a cover covering the front surface of the insulating substrate 2 The upper housing 5 houses the insulating substrate 2 by joining the lower housing 4 and the upper housing 5 with the adhesive 19. In addition, the protection element 1 has first and second external connection terminals 7 and 8. The first and second external connection terminals 7 and 8 are arranged to straddle the inside and outside of the housing 6 and are connected to the connection electrodes provided in the external circuit on which the protection element 1 is installed by screwing or the like. The first and second external connection terminals 7 and 8 are supported by the lower housing 4 and each end is connected by a soluble conductor 3. Furthermore, the protection element 1 is integrated into an external circuit via the first and second external connection terminals 7, 8 so that the soluble conductor 3 constitutes a part of the current path of the external circuit, and the heating element 10 described later generates heat or exceeds The rated overcurrent is fused, and the current path can be interrupted.

[絕緣基板] 絕緣基板2例如由氧化鋁、玻璃陶瓷、莫來石、氧化鋯等具有絕緣性之構件形成。此外，絕緣基板2亦可使用用於玻璃環氧樹脂基板、酚基板等印刷配線基板之材料。於圖3所示之絕緣基板2中，將經由後述之正面電極11而連接之可熔導體3之延伸方向之兩側緣設為第1側緣部2c，將形成後述之發熱體電極15及發熱體饋電電極16之兩側緣設為第2側緣部2d。[Insulating substrate] The insulating substrate 2 is formed of, for example, an insulating member such as alumina, glass ceramics, mullite, and zirconia. In addition, the insulating substrate 2 can also use materials used for printed wiring substrates such as glass epoxy substrates and phenol substrates. In the insulating substrate 2 shown in FIG. 3, the side edges in the extending direction of the soluble conductor 3 connected via the front electrode 11 described later are set as the first side edge portions 2c, and the heating element electrodes 15 and described later will be formed. Both side edges of the heating element power feeding electrode 16 are set as second side edge portions 2d.

[發熱體] 將可熔導體3熔斷之發熱體10係具有電阻值較高且當通電時發熱之導電性之構件，包含例如鎳鉻合金、W、Mo、Ru、Cu、Ag、或以其等為主成分之合金等。可藉由將該等合金或組成物、化合物之粉狀體與樹脂黏合劑等混合形成糊狀物，將該糊狀物利用絲網印刷技術於絕緣基板2之正面2a上形成圖案並進行煅燒等而形成。[heating stuff] The heating element 10 that fuses the soluble conductor 3 is a conductive member that has a high resistance value and generates heat when energized, and contains, for example, nickel-chromium alloy, W, Mo, Ru, Cu, Ag, or its main components The alloy and so on. It is possible to form a paste by mixing powders of these alloys or compositions, compounds with resin binders, etc., and pattern the paste on the front surface 2a of the insulating substrate 2 using screen printing technology and then calcinate And so on.

發熱體10在絕緣基板2之正面2a上由絕緣層9被覆。於絕緣層9上，積層後述之正面電極11。絕緣層9係為了謀求發熱體10之保護及絕緣，且高效率地向正面電極11及可熔導體3傳遞發熱體10之熱而設置，包含例如玻璃層。The heating element 10 is covered with an insulating layer 9 on the front surface 2 a of the insulating substrate 2. On the insulating layer 9, a front electrode 11 described later is laminated. The insulating layer 9 is provided to protect and insulate the heating element 10 and to efficiently transfer the heat of the heating element 10 to the front electrode 11 and the soluble conductor 3, and includes, for example, a glass layer.

發熱體10之一端與形成於絕緣基板2之正面2a之發熱體電極15連接。又，發熱體電極15與形成於絕緣層9上之正面電極11連接。藉此，發熱體10與搭載於正面電極11上之可熔導體3電性連接。又，發熱體10之另一端與發熱體饋電電極16連接。發熱體饋電電極16形成於絕緣基板2之正面2a，且經由銲膏等連接材料20與第3外部連接端子17連接，經由該第3外部連接端子17與外部電路連接。而且，保護元件1藉由與外部電路連接，而經由第3外部連接端子17將發熱體10組裝入形成於外部電路之向發熱體10之饋電路徑。One end of the heating element 10 is connected to the heating element electrode 15 formed on the front surface 2 a of the insulating substrate 2. In addition, the heating body electrode 15 is connected to the front electrode 11 formed on the insulating layer 9. Thereby, the heating element 10 is electrically connected to the soluble conductor 3 mounted on the front electrode 11. In addition, the other end of the heating element 10 is connected to the heating element feeding electrode 16. The heating element feeding electrode 16 is formed on the front surface 2 a of the insulating substrate 2, and is connected to the third external connection terminal 17 via a connecting material 20 such as solder paste, and is connected to an external circuit via the third external connection terminal 17. Furthermore, the protection element 1 is connected to an external circuit, and the heating element 10 is assembled into the power feeding path to the heating element 10 formed in the external circuit via the third external connection terminal 17.

又，發熱體10如圖3所示般，以通電方向成為與可熔導體3之通電方向交叉之方向之方式形成，發熱體電極15及發熱體饋電電極16形成於第2側緣部2d此舉，在有效率地使用絕緣基板2之面積上較佳。In addition, as shown in FIG. 3, the heating element 10 is formed so that the energizing direction becomes a direction intersecting the energizing direction of the soluble conductor 3, and the heating element electrode 15 and the heating element feeding electrode 16 are formed on the second side edge portion 2d This is preferable in terms of efficiently using the area of the insulating substrate 2.

又，發熱體10可於絕緣基板2之正面形成複數個。於圖3所示之保護元件1之例中，形成2個發熱體10。各發熱體10之一端與發熱體電極15連接，另一端與發熱體饋電電極16連接，且電性並聯連接。In addition, a plurality of heating elements 10 may be formed on the front surface of the insulating substrate 2. In the example of the protection element 1 shown in FIG. 3, two heating elements 10 are formed. One end of each heating element 10 is connected to the heating element electrode 15, and the other end is connected to the heating element feeding electrode 16, and is electrically connected in parallel.

此外，保護元件1亦可將發熱體10形成在積層於絕緣基板2之正面2a的絕緣層9之內部。又，保護元件1亦可將發熱體10形成於絕緣基板2之內部。又，保護元件1亦可將發熱體10形成於絕緣基板2之背面2b。此外，於將發熱體10形成於絕緣基板2之背面2b之情形下，發熱體10之一端與形成於絕緣基板2之背面2b的背面電極連接，經由貫通背面電極與正面電極11間之導電貫通孔而與搭載於正面電極11上之可熔導體2電性連接。又，發熱體10之另一端經由形成於絕緣基板2之背面2b的發熱體饋電電極而與第3外部連接端子17連接。In addition, in the protection element 1, the heating element 10 may be formed inside the insulating layer 9 laminated on the front surface 2 a of the insulating substrate 2. In addition, in the protection element 1, the heating element 10 may be formed inside the insulating substrate 2. In addition, in the protection element 1, the heating element 10 may be formed on the back surface 2 b of the insulating substrate 2. In addition, in the case where the heating element 10 is formed on the back surface 2b of the insulating substrate 2, one end of the heating element 10 is connected to the back surface electrode formed on the back surface 2b of the insulating substrate 2 through a conductive connection between the back surface electrode and the front electrode 11 The hole is electrically connected to the soluble conductor 2 mounted on the front electrode 11. In addition, the other end of the heating element 10 is connected to the third external connection terminal 17 via the heating element feeding electrode formed on the back surface 2 b of the insulating substrate 2.

[正面電極] 於絕緣層9上形成有正面電極11，該正面電極11經由發熱體電極15與發熱體10連接，且與可熔導體3連接。正面電極11經由銲膏等接合材料20而連接於可熔導體3。又，正面電極11當可熔導體3熔融時將熔融導體3a凝聚，藉此可將可熔導體3熔斷。[Front electrode] A front electrode 11 is formed on the insulating layer 9, and the front electrode 11 is connected to the heating body 10 via the heating body electrode 15 and connected to the soluble conductor 3. The front electrode 11 is connected to the soluble conductor 3 via a bonding material 20 such as solder paste. In addition, the front electrode 11 aggregates the fused conductor 3a when the soluble conductor 3 is melted, so that the soluble conductor 3 can be fused.

正面電極11亦可形成吸引孔12。吸引孔12當可熔導體3熔融時，利用毛細管現象吸引該熔融導體3a，減小在正面電極11上保持之熔融導體3a之體積(參照圖4)。保護元件1即便於為了因應大電流用途而增大可熔導體3之剖面積、因而熔融量增大之情形下，亦可藉由使吸引孔12吸引，而減小熔融導體3a之體積。具有此構成之絕緣基板2構成熔斷構件18，該熔斷構件18當發熱體10通電、發熱時，藉由該熱使可熔導體3熔融，將該熔融導體3a朝吸引孔12吸引並加以遮斷。The front electrode 11 may also form a suction hole 12. When the soluble conductor 3 is melted, the suction hole 12 uses the capillary phenomenon to attract the fused conductor 3a to reduce the volume of the fused conductor 3a held on the front electrode 11 (refer to FIG. 4). Even if the protective element 1 increases the cross-sectional area of the soluble conductor 3 for large current applications, thereby increasing the amount of melting, the suction hole 12 can be attracted to reduce the volume of the fused conductor 3a. The insulating substrate 2 having this structure constitutes a fuse member 18. When the heating element 10 is energized and generates heat, the fuse member 18 melts the soluble conductor 3 by the heat, and attracts and blocks the fused conductor 3a toward the suction hole 12 .

藉此，保護元件1可減小在正面電極11上保持之熔融導體3a之體積，而更確實地謀求第1、第2外部連接端子7、8間之絕緣，再者，減輕因在可熔導體3之熔斷時產生之電弧放電所致之熔融導體3a之飛散，防止絕緣電阻降低，進而，可防止因可熔導體3朝搭載位置之周邊電路附著所致之短路故障。Thereby, the protective element 1 can reduce the volume of the fused conductor 3a held on the front electrode 11, and more reliably achieve the insulation between the first and second external connection terminals 7, 8. The scattering of the molten conductor 3a caused by the arc discharge generated when the conductor 3 is fused prevents the insulation resistance from being reduced, and further prevents the short-circuit failure caused by the adhesion of the soluble conductor 3 to the peripheral circuit of the mounting position.

吸引孔12於內面形成導電層13。藉由形成導電層13，而吸引孔12可容易吸引熔融導體3a。導電層13係由例如銅、銀、金、鐵、鎳、鈀、鉛、錫之任一者、或以任一者為主成分之合金形成，可藉由電解鍍覆或導電膏體之印刷等周知之方法形成吸引孔12之內面。又，導電層13可藉由將複數條金屬線、或具有導電性之帶狀物之集合體***吸引孔12內而形成。A conductive layer 13 is formed on the inner surface of the suction hole 12. By forming the conductive layer 13, the suction hole 12 can easily attract the molten conductor 3a. The conductive layer 13 is formed of, for example, any one of copper, silver, gold, iron, nickel, palladium, lead, and tin, or an alloy containing any one of the main components, and can be electroplated or printed with conductive paste The inner surface of the suction hole 12 is formed by a well-known method. In addition, the conductive layer 13 can be formed by inserting an assembly of a plurality of metal wires or conductive ribbons into the suction hole 12.

又，吸引孔12較佳為形成為於絕緣基板2之厚度方向貫通之貫通孔。藉此，吸引孔12可將熔融導體3a吸引至絕緣基板2之背面2b側，可吸引更多之熔融導體3a，而減小熔斷部位之熔融導體3a之體積。此外，吸引孔12可形成為非貫通孔。In addition, the suction hole 12 is preferably formed as a through hole penetrating in the thickness direction of the insulating substrate 2. Thereby, the suction hole 12 can attract the molten conductor 3a to the back 2b side of the insulating substrate 2, and can attract more molten conductor 3a, thereby reducing the volume of the molten conductor 3a at the fusing part. In addition, the suction hole 12 may be formed as a non-through hole.

吸引孔12之導電層13與形成於絕緣基板2之正面2a之正面電極11連續。由於正面電極11支持可熔導體3且供熔融導體3a凝聚，故藉由正面電極11與導電層13連續，而可容易地將熔融導體3a導引至吸引孔12內。The conductive layer 13 of the suction hole 12 is continuous with the front electrode 11 formed on the front surface 2a of the insulating substrate 2. Since the front electrode 11 supports the soluble conductor 3 and allows the fused conductor 3a to aggregate, the fused conductor 3a can be easily guided into the suction hole 12 by the continuity of the front electrode 11 and the conductive layer 13.

此外，導電層13及正面電極11藉由被發熱體10加熱，而可容易將可熔導體3之熔融導體3a向吸引孔12內吸引，且容易將其在正面電極11上凝聚。因而，保護元件1可促進自正面電極11經由導電層13向吸引孔12吸引熔融導體3a之作用，確實地將可熔導體3熔斷。In addition, the conductive layer 13 and the front electrode 11 are heated by the heating element 10, so that the molten conductor 3 a of the soluble conductor 3 can be easily attracted into the suction hole 12, and it is easy to aggregate on the front electrode 11. Therefore, the protection element 1 can promote the action of attracting the fused conductor 3a from the front electrode 11 to the suction hole 12 through the conductive layer 13 and surely melt the soluble conductor 3.

又，可於絕緣基板2之背面2b，形成與吸引孔12之導電層13連接之背面電極14。藉由背面電極14與導電層13連續，而當可熔導體3熔融時，經由吸引孔12移動之熔融導體3a凝聚(參照圖4)。藉此，保護元件1可吸引更多之熔融導體3a，而減小熔斷部位之熔融導體3a之體積。In addition, a back electrode 14 connected to the conductive layer 13 of the suction hole 12 may be formed on the back surface 2b of the insulating substrate 2. Since the back electrode 14 is continuous with the conductive layer 13, when the soluble conductor 3 melts, the fused conductor 3a moving through the suction hole 12 aggregates (refer to FIG. 4). Thereby, the protection element 1 can attract more molten conductors 3a and reduce the volume of the molten conductors 3a at the fusing position.

此外，保護元件1可藉由形成複數個吸引孔12，而增加吸引可熔導體3之熔融導體3a之路徑，藉由吸引更多之熔融導體3a，而減小熔斷部位之熔融導體3a之體積。此時，複數個吸引孔12可跨於正面電極11與可熔導體3重疊之可熔導體3之寬度方向而形成。又，吸引孔12亦可形成於供熔融導體3a潤濕擴展之正面電極11與可熔導體3不重疊之區域。In addition, the protective element 1 can increase the path for attracting the fused conductor 3a of the soluble conductor 3 by forming a plurality of suction holes 12, and reduce the volume of the fused conductor 3a at the fusing position by attracting more fused conductors 3a . At this time, a plurality of suction holes 12 may be formed across the width direction of the soluble conductor 3 where the front electrode 11 and the soluble conductor 3 overlap. In addition, the suction hole 12 may also be formed in a region where the front electrode 11 for wetting and expanding the fused conductor 3a and the soluble conductor 3 do not overlap.

又，在將2個發熱體10排列設置之情形下，於形成於絕緣基板2之正面2a、背面2b或內部之任一情形下均形成於吸引孔12之兩側此舉，在加熱正面電極11及背面電極14，且將更多之熔融導體3a吸引、凝聚上較佳。In addition, in the case of arranging the two heating elements 10, they are formed on both sides of the suction hole 12 in any of the front surface 2a, the back surface 2b, or the inside of the insulating substrate 2. This is to heat the front electrode 11 and the back electrode 14, and it is better to attract and condense more molten conductor 3a.

[殼體] 其次，針對保護元件1之殼體6，進行說明。殼體6係藉由將下側外殼4與上側外殼5藉由接著劑19接合而形成。殼體6例如可使用各種工程塑膠、熱塑性塑膠、陶瓷等具有絕緣性之構件而形成。又，殼體6於絕緣基板2之正面2a上具有充分之內部空間，以供可熔導體3於熔融時膨脹為球狀，且供熔融導體3a在正面電極11及第1、第2外部連接端子7、8上凝聚。[case] Next, the case 6 of the protection element 1 will be described. The housing 6 is formed by joining the lower housing 4 and the upper housing 5 with an adhesive 19. The housing 6 can be formed by using insulating members such as various engineering plastics, thermoplastic plastics, and ceramics, for example. In addition, the housing 6 has sufficient internal space on the front surface 2a of the insulating substrate 2 for the soluble conductor 3 to expand into a spherical shape during melting, and for the fused conductor 3a to be connected to the front electrode 11 and the first and second exteriors Condensation on terminals 7 and 8.

下側外殼4與上側外殼5之接合係利用接著劑19進行。接著劑19藉由朝構成殼體6之側面之下側外殼4之側壁上端面與上側外殼5之側壁下端面5a之間供給並固化，而將下側外殼4與上側外殼5接合。作為接著劑19，無特別限制，可舉出例如熱固性接著劑。又，作為接著劑19之形態，只要係在接合過程中顯示流動性者即可，雖然其相狀態無限制，但基於作業性之觀點，較佳為液狀。The bonding between the lower housing 4 and the upper housing 5 is performed with an adhesive 19. Adhesive 19 is supplied between the upper end surface of the side wall of the lower casing 4 constituting the side surface of the casing 6 and the lower end surface 5a of the side wall of the upper casing 5 and cured, thereby joining the lower casing 4 and the upper casing 5. The adhesive 19 is not particularly limited, and for example, a thermosetting adhesive can be mentioned. In addition, as the form of the adhesive 19, any one that exhibits fluidity during the joining process may be sufficient. Although the phase state is not limited, it is preferably a liquid form from the viewpoint of workability.

又，在應用本發明之保護元件中，下側外殼4及上側外殼5於任一者形成嵌合凹部25，於任另一者形成嵌合於嵌合凹部25之嵌合凸部26。以下，以於下側外殼4設置嵌合凸部26，於上側外殼5設置嵌合凹部25之情形為例進行說明。In addition, in the protection element to which the present invention is applied, the lower housing 4 and the upper housing 5 form a fitting concave portion 25 in either one, and a fitting convex portion 26 to be fitted into the fitting concave portion 25 in the other. Hereinafter, a case where the fitting convex portion 26 is provided on the lower housing 4 and the fitting concave portion 25 is provided on the upper housing 5 will be described as an example.

[下側外殼] 圖5係顯示下側外殼4之圖，(A)係俯視圖，(B)係(A)之E-E’剖視圖。下側外殼4形成為大致方形狀，於各轉角部形成總計4個嵌合凸部26。雖然嵌合凸部26形成為圓柱狀，但嵌合凸部26之形狀只要為與後述之嵌合凹部25嵌合之凸形狀即可，可為例如圓錐狀、角柱狀、稜錐狀等。[Lower shell] Fig. 5 is a diagram showing the lower housing 4, (A) is a top view, and (B) is a cross-sectional view of (A) taken along E-E'. The lower housing 4 is formed in a substantially square shape, and a total of four fitting convex portions 26 are formed at each corner portion. Although the fitting convex portion 26 is formed in a cylindrical shape, the shape of the fitting convex portion 26 may be a convex shape that fits with the fitting concave portion 25 described later, and may be, for example, a cone shape, a prism shape, a pyramid shape, or the like.

又，下側外殼4於大致中央部設置將絕緣基板2之中央部保持為中空之凹面部23。下側外殼4沿凹面部23之側緣支持絕緣基板2之外側緣。藉由設置凹面部23，而可減小下側外殼4與絕緣基板2之接觸面積，抑制發熱體10之熱由下側外殼4吸熱。因而，保護元件1可將發熱體10之熱高效率地傳遞至可熔導體3，可使其更快速地熔斷。尤其是，藉由將凹面部23設置於下側外殼4之大致中央部，而可將發熱體10之正下方設為中空，抑制發熱體10之熱向下側外殼4之散熱。In addition, the lower housing 4 is provided with a recessed surface portion 23 that holds the center portion of the insulating substrate 2 as a hollow portion at a substantially center portion. The lower housing 4 supports the outer edge of the insulating substrate 2 along the side edge of the concave portion 23. By providing the concave portion 23, the contact area between the lower casing 4 and the insulating substrate 2 can be reduced, and the heat of the heating element 10 can be prevented from being absorbed by the lower casing 4. Therefore, the protection element 1 can efficiently transfer the heat of the heating element 10 to the soluble conductor 3, so that it can be fused more quickly. In particular, by providing the concave portion 23 at the substantially central portion of the lower housing 4, the heating element 10 can be made hollow directly under the heating element 10, and the heat of the heating element 10 can be prevented from being radiated to the lower housing 4.

[上側外殼] 圖6係顯示上側外殼5之圖，(A)係仰視圖，(b)係(A)之C-C’剖視圖。上側外殼5與下側外殼4同樣地形成為大致方形狀，於各轉角部設置供設置於下側外殼4之嵌合凸部26嵌合之總計4個嵌合凹部25。又，上側外殼5覆蓋形成於絕緣基板2之正面2a上之可熔導體3及第1、第2外部連接端子7、8，且具有可供熔斷之可熔導體3a於正面電極11及第1、第2外部連接端子7、8上凝聚之內部空間。[Upper shell] Fig. 6 is a diagram showing the upper housing 5, (A) is a bottom view, and (b) is a C-C' cross-sectional view of (A). The upper housing 5 is formed into a substantially square shape similarly to the lower housing 4, and a total of four fitting recesses 25 for fitting the fitting convex portions 26 provided in the lower housing 4 are provided at each corner portion. In addition, the upper housing 5 covers the soluble conductor 3 and the first and second external connection terminals 7, 8 formed on the front surface 2a of the insulating substrate 2, and has a fusible conductor 3a on the front surface electrode 11 and the first , The internal space condensed on the second external connection terminals 7, 8.

又，上側外殼5形成凹部狹槽27，該凹部狹槽27與嵌合凹部25連續且延伸至成為上側外殼5及下側外殼4之對接面之上側外殼5之側壁下端面5a，使接著劑19流動。如圖7所示，凹部狹槽27藉由在使上側外殼5及下側外殼4對接時，使填充於嵌合凹部25內之接著劑19之多餘部分流動至內部，而防止使接著劑19之多餘部分滯留於與嵌合凸部26嵌合之嵌合凹部25內。藉此，可防止由滯留於嵌合凹部25內之接著劑19之多餘部分，阻礙上側外殼5及下側外殼4之密接。此外，由於在嵌合凹部25內殘留與嵌合凸部26之接合所需之份額之接著劑19，故充分確保嵌合凹部25與嵌合凸部26之接著強度。又，藉由設置凹部狹槽27，而增加與接著劑19之接著面積，可謀求接著強度提高。In addition, the upper housing 5 is formed with a recessed portion slot 27 that is continuous with the fitting recess 25 and extends to the lower end surface 5a of the side wall of the upper housing 5 as the abutting surface of the upper housing 5 and the lower housing 4, so that the adhesive 19 mobile. As shown in FIG. 7, the recessed portion slot 27 prevents the excess portion of the adhesive 19 filled in the fitting recess 25 from flowing to the inside when the upper housing 5 and the lower housing 4 are butted, thereby preventing the adhesive 19 from being used. The excess part stays in the fitting concave portion 25 fitted with the fitting convex portion 26. Thereby, it is possible to prevent the excess part of the adhesive 19 staying in the fitting recess 25 from obstructing the close contact between the upper housing 5 and the lower housing 4. In addition, since the amount of adhesive 19 necessary for joining with the fitting convex portion 26 remains in the fitting concave portion 25, the bonding strength between the fitting concave portion 25 and the fitting convex portion 26 is sufficiently ensured. In addition, by providing the recessed portion slot 27 to increase the bonding area with the adhesive 19, the bonding strength can be improved.

因而，保護元件1不會在成為上側外殼5自下側外殼4浮起之狀態下密接，可獲得所期望之接著強度。藉此，保護元件1可防止產生上側外殼5在可熔導體3之熔斷時脫開、或無法滿足特定之殼體之高度條件等不良情況。Therefore, the protective element 1 is not in close contact with the upper housing 5 in the state where the upper housing 5 floats from the lower housing 4, and the desired adhesive strength can be obtained. Thereby, the protection element 1 can prevent the occurrence of such disadvantages as the upper casing 5 being disconnected when the soluble conductor 3 is fused, or the height condition of the specific casing cannot be satisfied.

凹部狹槽27較佳為沿被供給接著劑19之上側外殼5之側壁下端面5a形成。又，凹部狹槽27之長度無特別限制。凹部狹槽27之寬度雖然無特別限制，但較佳為俯視下為嵌合凹部25之直徑以下。又，凹部狹槽27之深度雖然無特別限制，但較佳為與嵌合凹部25之深度相同，或較其為淺。The recessed slot 27 is preferably formed along the lower end surface 5a of the side wall of the housing 5 on the upper side where the adhesive 19 is supplied. In addition, the length of the recessed portion slot 27 is not particularly limited. Although the width of the recessed portion slot 27 is not particularly limited, it is preferably equal to or less than the diameter of the fitting recessed portion 25 in a plan view. Furthermore, although the depth of the recessed portion slot 27 is not particularly limited, it is preferably the same as or shallower than the depth of the fitting recessed portion 25.

又，如圖6(B)所示，凹部狹槽27較佳為形成為隨著與嵌合凹部25分開，而自嵌合凹部25之底面側直到嵌合凹部25之上正面側逐漸變淺之錐形狀。藉此，將流入凹部狹槽27之接著劑19之多餘部分導引至成為上側外殼5及下側外殼4之對接面之上側外殼5之側壁下端面5a，而可供上側外殼5及下側外殼4之接合用。又，藉由相對地朝向殼體6之轉角部增加接著劑之供給量，而可提高接著強度。In addition, as shown in FIG. 6(B), the recessed portion slot 27 is preferably formed to gradually become shallower from the bottom surface side of the fitting recessed portion 25 to the upper front side of the fitting recessed portion 25 as it separates from the fitting recessed portion 25 The cone shape. Thereby, the excess part of the adhesive 19 flowing into the recessed portion slot 27 is guided to the lower end surface 5a of the side wall of the upper housing 5 which becomes the abutting surface of the upper housing 5 and the lower housing 4, and can be used for the upper housing 5 and the lower side Used for joining the shell 4. In addition, by increasing the supply amount of the adhesive relatively toward the corner portion of the housing 6, the adhesive strength can be improved.

又，凹部狹槽27如圖8所示般形成為隨著與嵌合凹部25分開，而逐漸擴寬。藉此，可容易使接著劑19之多餘部分自嵌合凹部25內進一步朝狹槽前端流出。In addition, as shown in FIG. 8, the recessed portion slot 27 is formed so as to gradually widen as it is separated from the fitting recessed portion 25. Thereby, the excess part of the adhesive 19 can easily flow out from the fitting recess 25 further toward the front end of the slot.

又，可如圖9所示般，自1個嵌合凹部25延伸出複數個凹部狹槽27。藉此，可使更多之接著劑19之多餘部分自嵌合凹部25內流出。此外，複數個凹部狹槽27之形狀(寬度、長度、深度、傾斜等)可相同，亦可藉由使其等不同，而使接著劑19之流動量相應於方向而不同。In addition, as shown in FIG. 9, a plurality of recessed portion slots 27 may be extended from one fitting recessed portion 25. In this way, more excess part of the adhesive 19 can flow out of the fitting recess 25. In addition, the shapes (width, length, depth, inclination, etc.) of the plurality of recessed slots 27 may be the same, or by making them different, the flow rate of the adhesive 19 may be different according to the direction.

又，如圖9所示，凹部狹槽27較佳為自形成於上側外殼5之各轉角部之1個嵌合凹部25沿鄰接之2個側壁分別形成。藉此，可使更多之接著劑19之多餘部分自嵌合凹部25內流出。又，藉此，將接著劑19之多餘部分導引至成為與下側外殼4之對接面之上側外殼5之側壁下端面5a，可供上側外殼5及下側外殼4之接合用。Moreover, as shown in FIG. 9, the recessed portion slot 27 is preferably formed from one fitting recessed portion 25 formed at each corner portion of the upper housing 5 along two adjacent side walls, respectively. In this way, more excess part of the adhesive 19 can flow out of the fitting recess 25. Furthermore, by this, the excess part of the adhesive 19 is guided to the lower end surface 5a of the side wall of the upper housing 5 as the abutting surface with the lower housing 4, which can be used for joining the upper housing 5 and the lower housing 4.

此外，凹部狹槽27較佳為形成為全嵌合凹部25，但可未必形成於全嵌合凹部25。In addition, the recessed portion slot 27 is preferably formed as the full-fitting recess 25, but may not necessarily be formed in the full-fitting recess 25.

又，如圖10所示，自相鄰之嵌合凹部25延伸之凹部狹槽27彼此可形成為連續。藉此，可將填充於嵌合凹部25內之接著劑19之多餘部分朝凹部狹槽27導出，且使對上側外殼5及下側外殼4之對接面供給之接著劑19之多餘部分吸收至凹部狹槽27內，防止接著劑19之多餘部分對密接之阻礙。又，藉由設置凹部狹槽27，而增加與接著劑19之接著面積，可謀求接著強度提高。Moreover, as shown in FIG. 10, the recessed part slots 27 extended from the adjacent fitting recessed part 25 may be formed continuously. Thereby, the excess part of the adhesive 19 filled in the fitting recess 25 can be led out toward the recess slot 27, and the excess part of the adhesive 19 supplied to the abutting surface of the upper housing 5 and the lower housing 4 can be absorbed to The recessed part slot 27 prevents the excess part of the adhesive 19 from obstructing the close contact. In addition, by providing the recessed portion slot 27 to increase the bonding area with the adhesive 19, the bonding strength can be improved.

此外，上側外殼5於與下側外殼4對接之側壁之下端面5a形成凹部，該凹部用於將由下側外殼4支持之第1、第2外部連接端子7、8及第3外部連接端子17跨於殼體6之內外而配設。該凹部形成於與第1、第2外部連接端子7、8及第3外部連接端子17之配設位置對應之位置，且凹部具有與第1、第2外部連接端子7、8及第3外部連接端子17之形狀相應之形狀。因而，殼體6使下側外殼4與上側外殼5無間隙地對接且接合，且可使第1、第2外部連接端子7、8及第3外部連接端子17向殼體外導出。In addition, the upper housing 5 has a recess formed on the lower end surface 5a of the side wall which is abutted with the lower housing 4, and the recess is used to connect the first, second external connection terminals 7, 8 and the third external connection terminal 17 supported by the lower housing 4 It is arranged across the inside and outside of the housing 6. The recessed portion is formed at a position corresponding to the arrangement position of the first, second external connection terminals 7, 8 and the third external connection terminal 17, and the recessed portion is provided with the first, second external connection terminals 7, 8 and the third external The shape of the connection terminal 17 corresponds to the shape. Therefore, the housing 6 allows the lower housing 4 and the upper housing 5 to be butted and joined without a gap, and the first, second external connection terminals 7, 8 and the third external connection terminal 17 can be led out of the housing.

於形成殼體6時，如圖11所示，對下側外殼4之包含嵌合凸部26之側緣部供給接著劑19，且與上側外殼5對接。藉此，將嵌合凸部26與嵌合凹部25經由接著劑19嵌合，將下側外殼4與上側外殼5接合。When the housing 6 is formed, as shown in FIG. 11, the adhesive 19 is supplied to the side edge portion of the lower housing 4 including the fitting convex portion 26 and is butted with the upper housing 5. Thereby, the fitting convex part 26 and the fitting concave part 25 are fitted via the adhesive 19, and the lower housing 4 and the upper housing 5 are joined.

[變化例1] 其次，針對應用本發明之保護元件之變化例進行說明。應用本發明之保護元件可取代與嵌合凹部25連續之凹部狹槽27，或者跟與嵌合凹部25連續之凹部狹槽27一起，將凸部狹槽28形成於嵌合凸部26。凸部狹槽28設置於嵌合凸部26之周面，藉由使接著劑19之多餘部分流動，而防止接著劑19之多餘部分對下側外殼4與上側外殼5之密接之阻礙。[Variation 1] Next, a description will be given of a modification example of the protection element to which the present invention is applied. The protection element to which the present invention is applied can replace the recessed slot 27 continuous with the fitting recess 25, or together with the recessed slot 27 continuous with the fitting recess 25, the convex slot 28 can be formed in the fitting convex 26. The convex part slot 28 is provided on the peripheral surface of the fitting convex part 26 to prevent the excess part of the adhesive 19 from obstructing the close contact between the lower housing 4 and the upper housing 5 by allowing the excess part of the adhesive 19 to flow.

凸部狹槽28形成於嵌合凸部26之外周面，例如，可如圖12、圖13所示般，凸部狹槽28沿嵌合凸部26之突出方向形成為直線狀。圖12係顯示在下側外殼4設置有凸部狹槽28之殼體6之圖，(A)係上側外殼5之仰視圖，(B)係使上側外殼5與下側外殼4對向配置之剖視圖，(C)係下側外殼4之俯視圖。圖13係顯示形成有凸部狹槽28之嵌合凸部26之圖，(A)係俯視圖，(B)係(A)之J-J’剖視圖。The convex portion slot 28 is formed on the outer peripheral surface of the fitting convex portion 26. For example, as shown in FIGS. 12 and 13, the convex portion slot 28 may be formed linearly along the protruding direction of the fitting convex portion 26. Fig. 12 is a diagram showing the housing 6 provided with a convex slot 28 on the lower housing 4, (A) is a bottom view of the upper housing 5, and (B) is an arrangement where the upper housing 5 and the lower housing 4 are opposed to each other The cross-sectional view, (C) is a plan view of the lower housing 4. Fig. 13 is a diagram showing the fitting convex portion 26 formed with the convex portion slot 28, (A) is a plan view, and (B) is a J-J' cross-sectional view of (A).

此外，凸部狹槽28之形態並不限定於直線狀，可為波形狀、矩形波狀、鋸齒狀等。又，凸部狹槽28除形成於嵌合凸部26之突出方向以外，還可於周繞外周面之方向形成。又，凸部狹槽28可於嵌合凸部26之外周面形成為螺旋狀。又，凸部狹槽28可連續形成，亦可斷續形成。In addition, the shape of the convex slot 28 is not limited to a linear shape, and may be a wave shape, a rectangular wave shape, a sawtooth shape, or the like. In addition, the convex portion slot 28 may be formed in a direction surrounding the outer peripheral surface in addition to the protrusion direction of the fitting convex portion 26. In addition, the convex portion slot 28 may be formed in a spiral shape on the outer peripheral surface of the fitting convex portion 26. In addition, the convex portion slot 28 may be formed continuously or intermittently.

形成凸部狹槽28之朝向雖然無特別限制，但較佳為朝向被供給接著劑19之下側外殼4與上側外殼5之對接面而形成。例如，在圖12所示之構成中，凸部狹槽28較佳為朝沿下側外殼4之側壁之朝向形成。藉此，可使接著劑19之多餘部分流動至被供給接著劑19之下側外殼4與上側外殼5之對接面，可供接著用。又，於設置與上述之嵌合凹部25連續之凹部狹槽27之情形下，較佳為與凹部狹槽27朝相同之朝向形成。Although the direction in which the convex portion slot 28 is formed is not particularly limited, it is preferably formed toward the abutting surface of the lower housing 4 and the upper housing 5 to which the adhesive 19 is supplied. For example, in the configuration shown in FIG. 12, the convex slot 28 is preferably formed in the direction along the side wall of the lower housing 4. Thereby, the excess part of the adhesive 19 can be allowed to flow to the abutting surface of the lower shell 4 and the upper shell 5 to which the adhesive 19 is supplied, and can be used for bonding. In addition, in the case where the recessed portion slot 27 that is continuous with the above-mentioned fitting recessed portion 25 is provided, it is preferably formed in the same direction as the recessed portion slot 27.

又，凸部狹槽28較佳為自嵌合凸部28之基部形成。嵌合凸部26之基部由於成為下側外殼4與上側外殼5之對接面，故藉由積極地吸收接著劑19之多餘部分，而可促進密接。又，凸部狹槽28較佳為跨於嵌合凸部28之頂部而形成。藉此，可容易將滯留於嵌合凹部25內之接著劑19之多餘部分導入凸部狹槽28，且使接著劑19之吸收量增加。In addition, the convex portion slot 28 is preferably formed from the base of the fitting convex portion 28. Since the base portion of the fitting convex portion 26 becomes the butting surface of the lower housing 4 and the upper housing 5, it is possible to promote close adhesion by actively absorbing the excess portion of the adhesive 19. In addition, the convex portion slot 28 is preferably formed to straddle the top of the fitting convex portion 28. Thereby, the excess part of the adhesive 19 staying in the fitting recess 25 can be easily introduced into the convex slot 28, and the absorption amount of the adhesive 19 can be increased.

又，凸部狹槽28可於一個嵌合凸部26形成複數個。藉此，可使更多之接著劑19之多餘部分吸收至凸部狹槽28內。又，凸部狹槽28較佳為如圖12所示般，朝沿形成於下側外殼4之轉角部之嵌合凸部26之鄰接2個側壁之朝向形成。藉此，可使接著劑19之多餘部分流動至被供給接著劑19之下側外殼4與上側外殼5之對接面，可供接著用。又，如設置有與上述之嵌合凹部25連續之凹部狹槽27，較佳形成為與凹部狹槽27相同之朝向。In addition, a plurality of convex portion slots 28 may be formed in one fitting convex portion 26. In this way, more excess part of the adhesive 19 can be absorbed into the convex slot 28. In addition, the convex portion slot 28 is preferably formed in the direction of the two adjacent side walls of the fitting convex portion 26 formed at the corner portion of the lower housing 4 as shown in FIG. 12. Thereby, the excess part of the adhesive 19 can be allowed to flow to the abutting surface of the lower shell 4 and the upper shell 5 to which the adhesive 19 is supplied, and can be used for bonding. In addition, if a recessed portion slot 27 that is continuous with the above-mentioned fitting recessed portion 25 is provided, it is preferably formed in the same direction as the recessed portion slot 27.

又，如圖14、圖15所示，凸部狹槽28可在俯視下形成為其寬度自嵌合凸部26之周面至中心方向逐漸變小之錐形狀。藉此，可使毛細管現象發生作用，使接著劑19流入凸部狹槽28內，且可增加流入量。Moreover, as shown in FIGS. 14 and 15, the convex portion slot 28 may be formed in a tapered shape whose width gradually decreases from the circumferential surface of the fitting convex portion 26 to the center direction in a plan view. Thereby, the capillary phenomenon can be activated, the adhesive 19 can flow into the convex slot 28, and the inflow can be increased.

又，凸部狹槽28可在剖視下形成為自嵌合凸部26之頂部至基部逐漸擴寬之錐形狀。藉此，可使毛細管現象發生作用，使滯留於下側外殼4與上側外殼5之對接面的接著劑19之多餘部分流入凸部狹槽28內，且可增加流入量。In addition, the convex portion slot 28 may be formed in a tapered shape gradually widening from the top of the fitting convex portion 26 to the base portion in a cross-sectional view. Thereby, the capillary phenomenon can be caused to cause the excess part of the adhesive 19 remaining on the abutting surface of the lower housing 4 and the upper housing 5 to flow into the convex slot 28, and the inflow can be increased.

此外，在圖12、圖14所示之保護元件1中，雖然於形成於下側外殼4之嵌合凸部26設置凸部狹槽28，使其與形成於上側外殼5之嵌合凹部25嵌合，但亦可於上側外殼5形成與嵌合凹部25連續之凹部狹槽27。藉由形成與嵌合凸部26連續之凸部狹槽28，且形成與嵌合凹部25連續之凹部狹槽27，而可吸收更多的接著劑19之多餘部分，防止接著劑19之多餘部分阻礙到下側外殼4與上側外殼5之密接。In addition, in the protection element 1 shown in FIGS. 12 and 14, although the fitting convex portion 26 formed in the lower housing 4 is provided with a convex portion slot 28 so as to be aligned with the fitting concave portion 25 formed in the upper housing 5. However, it is also possible to form a recessed portion slot 27 continuous with the fitting recessed portion 25 in the upper housing 5. By forming the convex portion slot 28 continuous with the fitting convex portion 26 and forming the concave portion slot 27 continuous with the fitting concave portion 25, more excess part of the adhesive 19 can be absorbed and the excess of the adhesive 19 can be prevented Partially hinders the close contact between the lower housing 4 and the upper housing 5.

[變化例2] 在上述之實施之形態中，針對於上側外殼5形成有嵌合凹部25及凹部狹槽27之構成、及於下側外殼4形成有嵌合凸部26及凸部狹槽28之構成進行了說明，但應用本發明之保護元件可如圖16、圖17所示般，於上側外殼51形成上述之嵌合凸部26，於下側外殼52形成上述之嵌合凹部25及凹部狹槽27。此外，在以下之說明中，針對與上述之保護元件1相同之構成賦予同一符號，且省略其細節。[Variation 2] In the above-mentioned embodiment, the configuration in which the fitting concave portion 25 and the concave portion slot 27 are formed in the upper housing 5 and the configuration in which the fitting convex portion 26 and the convex portion slot 28 are formed in the lower housing 4 have been described. Note, but the protection element applying the present invention can be as shown in FIG. 16 and FIG. 17, the above-mentioned fitting convex portion 26 is formed on the upper shell 51, and the above-mentioned fitting concave portion 25 and concave portion slot 27 are formed on the lower shell 52 . In addition, in the following description, the same reference numerals are given to the same configuration as the above-mentioned protective element 1 and the details thereof are omitted.

於圖18中形成將上側外殼51與下側外殼52接合而形成保護元件50之步驟。圖16係顯示設置有嵌合凸部26之上側外殼51之圖，(A)係仰視圖，(B)係(A)之L-L’剖視圖。圖17係顯示設置有嵌合凹部25之下側外殼52之圖，(A)係俯視圖，(B)係(A)之M-M’剖視圖。保護元件50如圖17所示般，於下側外殼52形成上述之嵌合凹部25及凹部狹槽27。The step of joining the upper housing 51 and the lower housing 52 to form the protective element 50 is formed in FIG. 18. Fig. 16 is a diagram showing the upper housing 51 provided with the fitting convex portion 26, (A) is a bottom view, and (B) is a cross-sectional view taken along the line (A) of L-L'. Fig. 17 is a view showing the lower housing 52 provided with the fitting recess 25, (A) is a plan view, and (B) is a M-M' cross-sectional view of (A). As shown in FIG. 17, the protection element 50 is formed with the above-mentioned fitting recess 25 and the recess slot 27 in the lower housing 52.

下側外殼52與上側外殼51之接合步驟與上述之保護元件1同樣。亦即，如圖19(A)(B)所示，沿下側外殼52之與上側外殼51之對接面供給接著劑19。此時，接著劑19被供給至形成於下側外殼52之各轉角部之嵌合凹部25及凹部狹槽27上。而且，如圖18所示，若將形成於上側外殼51之嵌合凸部26***嵌合凹部25內，將下側外殼52與上側外殼51對接，則填充於嵌合凹部25內之接著劑19之多餘部分流出至凹部狹槽27，防止滯留於嵌合凹部25內。藉此，可防止由滯留於嵌合凹部25內之接著劑19之多餘部分，阻礙上側外殼51及下側外殼52之密接。又，藉由設置凹部狹槽27，而增加與接著劑19之接著面積，可謀求接著強度提高。The joining procedure of the lower housing 52 and the upper housing 51 is the same as that of the protective element 1 described above. That is, as shown in FIG. 19(A)(B), the adhesive 19 is supplied along the abutting surface of the lower housing 52 and the upper housing 51. At this time, the adhesive 19 is supplied to the fitting recess 25 and the recess slot 27 formed in each corner of the lower housing 52. Furthermore, as shown in FIG. 18, if the fitting convex portion 26 formed in the upper housing 51 is inserted into the fitting recess 25, and the lower housing 52 and the upper housing 51 are butted, the adhesive filled in the fitting recess 25 The excess part of 19 flows out to the recessed portion slot 27 to prevent staying in the fitting recessed portion 25. Thereby, it is possible to prevent the excess part of the adhesive 19 staying in the fitting recess 25 from obstructing the close contact between the upper housing 51 and the lower housing 52. In addition, by providing the recessed portion slot 27 to increase the bonding area with the adhesive 19, the bonding strength can be improved.

[變化例3] 又，在保護元件50中亦然，可取代與形成於下側外殼52之嵌合凹部25連續之凹部狹槽27，或者跟與嵌合凹部25連續之凹部狹槽27一起，在形成於上側外殼51之嵌合凸部26，形成上述之凸部狹槽28。由於針對該等凹部狹槽27及凸部狹槽28之構成，已於保護元件1中詳細敘述，故省略細節。此外，在保護元件50中亦然，毋庸置疑，可與保護元件1同樣地，可將凹部狹槽27及凸部狹槽28之形態進行各種變更。[Variation 3] Also, in the protection element 50, it is possible to replace the recessed portion slot 27 continuous with the fitting recessed portion 25 formed in the lower housing 52, or together with the recessed portion slot 27 continuous to the fitting recessed portion 25, formed on the upper side The fitting convex portion 26 of the housing 51 forms the convex portion slot 28 described above. Since the configuration of the concave portion slot 27 and the convex portion slot 28 has been described in detail in the protection element 1, the details are omitted. The same applies to the protection element 50. Needless to say, the shape of the recessed portion slot 27 and the convex portion slot 28 can be variously changed as in the protection element 1.

[可熔導體] 其次，針對可熔導體3進行說明。可熔導體3跨於第1及第2外部連接端子7、8間而安裝，藉由因發熱體10之通電引起之發熱、或超過額定之電流流通，而自發熱(焦耳熱)，藉此熔斷，遮斷第1外部連接端子7與第2外部連接端子8之間之電流路徑。[Fusible Conductor] Next, the soluble conductor 3 will be described. The soluble conductor 3 is installed across the first and second external connection terminals 7, 8 and generates self-heating (Joule heat) by the heat generated by the energization of the heating element 10 or the flow of current exceeding the rated current. Fuse cuts off the current path between the first external connection terminal 7 and the second external connection terminal 8.

可熔導體3只要為藉由因發熱體10之通電引起之發熱、或過電流狀態而熔融之導電性材料即可，例如除SnAgCu系無Pb焊料以外，還可使用BiPbSn合金、BiPb合金、BiSn合金、SnPb合金、PbIn合金、ZnAl合金、InSn合金、PbAgSn合金等。The soluble conductor 3 only needs to be a conductive material that melts due to heat generated by the heating element 10 or an overcurrent state. For example, in addition to the SnAgCu-based Pb-free solder, BiPbSn alloy, BiPb alloy, and BiSn can also be used. Alloy, SnPb alloy, PbIn alloy, ZnAl alloy, InSn alloy, PbAgSn alloy, etc.

又，可熔導體3可為含有高熔點金屬、及低熔點金屬之構造體。例如，如圖20所示，可熔導體3係包含內層與外層之積層構造體，具有低熔點金屬層31來作為內層，具有高熔點金屬層32來作為積層於低熔點金屬層31之外層。可熔導體3經由銲膏等接合材料20連接於第1、第2外部連接端子7、8及正面電極11上。In addition, the soluble conductor 3 may be a structure containing a high melting point metal and a low melting point metal. For example, as shown in FIG. 20, the soluble conductor 3 is a laminated structure including an inner layer and an outer layer, and has a low melting point metal layer 31 as the inner layer, and a high melting point metal layer 32 as a layer on the low melting point metal layer 31. Outer layer. The soluble conductor 3 is connected to the first and second external connection terminals 7 and 8 and the front electrode 11 via a bonding material 20 such as solder paste.

低熔點金屬層31較佳為焊料或以Sn為主成分之金屬，係一般被稱為「無Pb焊料」之材料。低熔點金屬層31之熔點未必必須高於回流爐之溫度，可在200℃左右熔融。高熔點金屬層32係積層於低熔點金屬層31之正面之金屬層，例如為Ag或Cu或以其等中任一者為主成分之金屬，具有即便於藉由回流進行第1、第2外部連接端子7、8及正面電極11與可熔導體3之連接之情形下，亦不熔融之較高之熔點。The low melting point metal layer 31 is preferably solder or a metal mainly composed of Sn, which is generally referred to as "Pb-free solder". The melting point of the low melting point metal layer 31 does not necessarily have to be higher than the temperature of the reflow furnace, and can be melted at about 200°C. The high melting point metal layer 32 is a metal layer laminated on the front surface of the low melting point metal layer 31, such as Ag, Cu, or a metal containing any one of them as the main component. When the external connection terminals 7, 8 and the front electrode 11 are connected to the soluble conductor 3, the higher melting point does not melt.

此可熔導體3可藉由使用鍍覆技術將高熔點金屬層成膜於低熔點金屬箔而形成，或亦可使用其他周知之積層技術、膜形成技術而形成。此時，可熔導體3可採用低熔點金屬層31之全面由高熔點金屬層32被覆之構造，亦可採用除相對向之一對側面以外予以被覆之構造。此外，可熔導體3可將高熔點金屬層32設為內層、將低熔點金屬層31設為外層而構成，又可由設為由低熔點金屬層與高熔點金屬層交替地積層而成之3層以上之多層構造之於外層之一部分設置開口部而使內層之一部分露出等各種構成形成。The soluble conductor 3 can be formed by forming a high-melting-point metal layer on a low-melting-point metal foil using a plating technology, or can also be formed by using other well-known build-up technology and film formation technology. At this time, the soluble conductor 3 may adopt a structure in which the entire surface of the low-melting-point metal layer 31 is covered by the high-melting-point metal layer 32, or may adopt a structure in which the entire surface of the low-melting-point metal layer 31 is covered by a pair of opposite sides. In addition, the soluble conductor 3 may be formed by using the high melting point metal layer 32 as the inner layer and the low melting point metal layer 31 as the outer layer, or may be formed by alternately stacking low melting point metal layers and high melting point metal layers. A multi-layer structure with three or more layers is formed by providing an opening in a part of the outer layer and exposing a part of the inner layer.

可熔導體3藉由在成為內層之低熔點金屬層31，積層高熔點金屬層32來作為外層，而即便於回流溫度超過低熔點金屬層31之熔融溫度之情形下，作為可熔導體3，亦可維持形狀，不會導致熔斷。因而，保護元件1可藉由回流高效率地進行第1、第2外部連接端子7、8及正面電極11與可熔導體3之連接。又，保護元件1藉由回流，亦可防止因伴隨著可熔導體3之變形而局部地電阻值變高或變低等，而在特定之溫度未熔斷、或在未達特定之溫度下熔斷等熔斷特性之變動。The soluble conductor 3 serves as the soluble conductor 3 by laminating the low-melting-point metal layer 31 as the inner layer and the high-melting-point metal layer 32 as the outer layer, even when the reflow temperature exceeds the melting temperature of the low-melting-point metal layer 31 , Can also maintain the shape, will not cause fusing. Therefore, the protection element 1 can efficiently connect the first and second external connection terminals 7, 8 and the front electrode 11 to the soluble conductor 3 by reflow. In addition, by reflowing, the protective element 1 can also prevent the resistance value from becoming higher or lower locally due to the deformation of the soluble conductor 3, and not fusing at a specific temperature or fusing at a specific temperature. Such as changes in fusing characteristics.

又，可熔導體3在流通特定之額定電流之期間，亦不會因自發熱而熔斷。而且，當流通高於額定之值之電流時，因自發熱而熔融，遮斷第1、第2外部連接端子7、8間之電流路徑。又，可熔導體3藉由發熱體10被通電並發熱而熔融，遮斷第1、第2外部連接端子7、8間之電流路徑。In addition, the soluble conductor 3 will not fuse due to self-heating during the period when a specific rated current flows. Furthermore, when a current higher than the rated value flows, it melts due to self-heating, blocking the current path between the first and second external connection terminals 7, 8. In addition, the soluble conductor 3 is melted when the heating element 10 is energized and generates heat, thereby blocking the current path between the first and second external connection terminals 7 and 8.

此時，可熔導體3藉由熔融之低熔點金屬層31將高熔點金屬層32浸蝕(焊料侵蝕)，而高熔點金屬層32以較熔融溫度為低之溫度熔解。因而，可熔導體3可利用由低熔點金屬層31對高熔點金屬層32之浸蝕作用，以短時間熔斷。又，可熔導體3之熔融導體3a由於藉由正面電極11及第1、第2外部連接端子7、8之物理性拉入作用被分斷，故可快速且確實地遮斷第1、第2外部連接端子7、8間之電流路徑(圖4)。At this time, the soluble conductor 3 etches the high melting point metal layer 32 (solder erosion) by the molten low melting point metal layer 31, and the high melting point metal layer 32 is melted at a temperature lower than the melting temperature. Therefore, the soluble conductor 3 can use the etching effect of the low melting point metal layer 31 on the high melting point metal layer 32 to melt in a short time. In addition, the fused conductor 3a of the soluble conductor 3 is disconnected by the physical pull-in action of the front electrode 11 and the first and second external connection terminals 7, 8. 2 Current path between external connection terminals 7 and 8 (Figure 4).

又，可熔導體3較佳為使低熔點金屬層31之體積大於高熔點金屬層32之體積而形成。可熔導體3藉由因過電流所致之自發熱或發熱體10之發熱而被加熱，藉由低熔點金屬熔融而將高熔點金屬熔蝕，藉此可快速地熔融、熔斷。因而，可熔導體3藉由使低熔點金屬層31之體積大於高熔點金屬層32之體積而形成，而促進該熔蝕作用，可快速地將第1、第2外部連接端子7、8間予以遮斷。In addition, the soluble conductor 3 is preferably formed by making the volume of the low melting point metal layer 31 larger than the volume of the high melting point metal layer 32. The soluble conductor 3 is heated by the self-heating caused by overcurrent or the heating of the heating element 10, and the high-melting-point metal is eroded by melting the low-melting-point metal, thereby being able to melt and fuse quickly. Therefore, the soluble conductor 3 is formed by making the volume of the low-melting-point metal layer 31 larger than the volume of the high-melting-point metal layer 32 to promote the erosion effect and quickly connect the first and second external connection terminals 7, 8 Be blocked.

又，可熔導體3由於在成為內層之低熔點金屬層31積層高熔點金屬層32而構成，故可使熔斷溫度較先前之包含高熔點金屬之晶片保險絲等大幅度降低。因而，可熔導體3與同一尺寸之晶片保險絲等比較，可增大剖面積，且可大幅度提高電流額定。又，可謀求較具有相同之電流額定之先前之晶片保險絲更小型化、薄型化，而快速熔斷性優異。In addition, since the soluble conductor 3 is formed by laminating the high melting point metal layer 32 on the low melting point metal layer 31 which becomes the inner layer, the melting temperature can be greatly reduced compared with the conventional chip fuses containing high melting point metals. Therefore, compared with the chip fuse of the same size, the soluble conductor 3 can increase the cross-sectional area, and can greatly increase the current rating. In addition, it is possible to achieve a smaller and thinner chip fuse that has the same current rating, and has an excellent quick-blow performance.

又，可熔導體3可提高對於對組裝有保護元件1之電氣系統瞬間施加異常高之電壓之浪湧之耐性(耐脈衝性)。亦即，可熔導體3甚至在例如100 A之電流流通數msec之情形下，亦不會熔斷。關於此點，基於在極短時間流通之大電流在導體之表層流通(表皮效應)，而可熔導體3設置電阻值較低之鍍Ag等高熔點金屬層32來作為設置外層，故容易使由浪湧施加之電流流通，可防止因自發熱所致之熔斷。因而，可熔導體3與先前之包含焊料合金之保險絲比較，可大幅度提高對於浪湧之耐性。In addition, the soluble conductor 3 can improve the resistance (pulse resistance) to a surge of an abnormally high voltage instantaneously applied to the electrical system in which the protection element 1 is incorporated. That is, the soluble conductor 3 does not melt even when a current of 100 A flows for several msec, for example. In this regard, based on the fact that a large current flowing in a very short time flows on the surface of the conductor (skin effect), the soluble conductor 3 is provided with a low-resistance high-melting-point metal layer 32 such as Ag plating as the outer layer, so it is easy to use The current flow applied by the surge can prevent the fusing caused by self-heating. Therefore, the soluble conductor 3 can greatly improve the surge resistance compared with the previous fuse containing solder alloy.

此外，可熔導體3可為了抗氧化、及熔斷時之潤濕性提高等，而塗佈助熔劑(未圖示)。In addition, the soluble conductor 3 may be coated with a flux (not shown) in order to resist oxidation, improve wettability during fusing, and the like.

[電路構成例] 此保護元件1如圖21所示般，例如組裝入鋰離子二次電池之電池組33內之電路而使用。電池組33例如具有電池堆35，該電池堆35包含總計4個鋰離子二次電池之電池單元34a～34d。[Circuit configuration example] As shown in FIG. 21, this protection element 1 is used, for example, by being assembled into a circuit in a battery pack 33 of a lithium ion secondary battery. The battery pack 33 has, for example, a battery stack 35 including a total of four lithium-ion secondary battery cells 34a to 34d.

電池組33具備：電池堆35；充放電控制電路36，其控制電池堆35之充放電；應用本發明之保護元件1，其在電池堆35之異常時遮斷充放電路徑；檢測電路37，其檢測各電池單元34a～34d之電壓；及電流控制元件38，其成為相應於檢測電路37之檢測結果而控制保護元件1之動作之開關元件。The battery pack 33 includes: a battery stack 35; a charge and discharge control circuit 36 that controls the charge and discharge of the battery stack 35; the protection element 1 of the present invention is applied to block the charge and discharge path when the battery stack 35 is abnormal; and a detection circuit 37, It detects the voltage of each battery cell 34a to 34d; and the current control element 38, which becomes a switching element that controls the operation of the protection element 1 in accordance with the detection result of the detection circuit 37.

電池堆35係將用於保護避免過充電及過放電狀態而進行控制所需的電池單元34a～34d串聯連接而成者，經由電池組33之正極端子33a、負極端子33b可拆裝地連接於充電裝置29，被施加來自充電裝置29之充電電壓。藉由將由充電裝置29充電後之電池組33之正極端子33a、負極端子33b連接於利用電池而動作之電子機器，可使該電子機器動作。The battery stack 35 is formed by connecting in series the battery cells 34a to 34d necessary for the control to prevent overcharge and overdischarge, and is detachably connected to the positive terminal 33a and the negative terminal 33b of the battery pack 33 The charging device 29 is applied with a charging voltage from the charging device 29. By connecting the positive terminal 33a and the negative terminal 33b of the battery pack 33 charged by the charging device 29 to an electronic device operated by the battery, the electronic device can be operated.

充放電控制電路36具備：2個電流控制元件39a、39b，其等串聯連接於電池堆35與充電裝置29之間之電流路徑；及控制部40，其控制該等電流控制元件39a、39b之動作。電流控制元件39a、39b由例如場效電晶體(以下稱為FET)構成，其藉由控制部40控制閘極電壓，而控制對電池堆35之電流路徑之充電方向及/或放電方向之導通及遮斷。控制部40自充電裝置29接收電力供給而動作，其相應於檢測電路37之檢測結果，當電池堆35過放電或過充電時，以遮斷電流路徑之方式，控制電流控制元件39a、39b之動作。The charge and discharge control circuit 36 includes: two current control elements 39a, 39b, which are connected in series to the current path between the battery stack 35 and the charging device 29; and a control unit 40, which controls one of the current control elements 39a, 39b action. The current control elements 39a, 39b are composed of, for example, field-effect transistors (hereinafter referred to as FETs), which are controlled by the control unit 40 to control the gate voltage to control the conduction of the charging direction and/or the discharging direction of the current path of the battery stack 35 And interruption. The control unit 40 receives the power supply from the charging device 29 and operates. It corresponds to the detection result of the detection circuit 37. When the battery stack 35 is over-discharged or over-charged, it controls the current control elements 39a, 39b by blocking the current path. action.

保護元件1例如連接於電池堆35與充放電控制電路36之間之充放電電流路徑上，其動作由電流控制元件38予以控制。The protection element 1 is, for example, connected to the charge and discharge current path between the battery stack 35 and the charge and discharge control circuit 36, and its operation is controlled by the current control element 38.

檢測電路37與各電池單元34a～34d連接，檢測各電池單元34a～34d之電壓值，且將各電壓值供給至充放電控制電路36之控制部40。又，當電池單元34a～34d之任一者成為過充電電壓或過放電電壓時，檢測電路37輸出控制電流控制元件38之控制信號。The detection circuit 37 is connected to the respective battery cells 34 a to 34 d, detects the voltage values of the respective battery cells 34 a to 34 d, and supplies the respective voltage values to the control unit 40 of the charge and discharge control circuit 36. Furthermore, when any one of the battery cells 34a to 34d becomes an overcharge voltage or an overdischarge voltage, the detection circuit 37 outputs a control signal for controlling the current control element 38.

電流控制元件38係由例如FET構成，根據自檢測電路37輸出之檢測信號，當電池單元34a～34d之電壓值成為超過特定之過放電或過充電狀態之電壓時，使保護元件1動作，不憑藉電流控制元件39a、39b之開關動作而以遮斷電池堆35之充放電電流路徑之方式進行控制。The current control element 38 is composed of, for example, an FET. Based on the detection signal output from the detection circuit 37, when the voltage value of the battery cells 34a to 34d exceeds a specific overdischarge or overcharge state, the protection element 1 is activated. Relying on the switching actions of the current control elements 39a and 39b, the control is performed in a manner of blocking the charging and discharging current path of the battery stack 35.

包含如以上之構成之電池組33所使用之應用本發明之保護元件1具有如圖22所示之電路構成。亦即，保護元件1將第1外部連接端子7與電池堆35側連接，將第2外部連接端子8與正極端子33a側連接，藉此，將可熔導體3串聯連接於電池堆35之充放電路徑上。又，保護元件1將發熱體10經由發熱體饋電電極16及第3外部連接端子17與電流控制元件38連接，且將發熱體10與電池堆35之開放端連接。藉此，發熱體10將一端經由正面電極11與可熔導體3及電池堆35之一者之開放端連接，將另一端經由第3外部連接端子17與電流控制元件38及電池堆35之另一者之開放端連接。藉此，形成向由電流控制元件38控制通電之發熱體10之饋電路徑。The protective element 1 to which the present invention is applied for the battery pack 33 including the above-mentioned configuration has a circuit configuration as shown in FIG. 22. That is, the protection element 1 connects the first external connection terminal 7 to the battery stack 35 side, and connects the second external connection terminal 8 to the positive terminal 33a side, thereby connecting the soluble conductor 3 to the battery stack 35 in series. On the discharge path. In addition, the protection element 1 connects the heating element 10 to the current control element 38 via the heating element feed electrode 16 and the third external connection terminal 17, and connects the heating element 10 to the open end of the battery stack 35. Thereby, the heating element 10 has one end connected to the open end of one of the soluble conductor 3 and the battery stack 35 via the front electrode 11, and the other end is connected to the other end of the current control element 38 and the battery stack 35 via the third external connection terminal 17 One of the open end connections. Thereby, a power feeding path to the heating element 10 controlled by the current control element 38 to be energized is formed.

[保護元件之動作] 若檢測電路37檢測到電池單元34a～34d之任一者之異常電壓，則向電流控制元件38輸出遮斷信號。如是，電流控制元件38以對發熱體10通電之方式，控制電流。保護元件1自電池堆35朝發熱體10流通電流，藉此，發熱體10開始發熱。保護元件1藉由發熱體10之發熱，而將可熔導體3熔斷，遮斷電池堆35之充放電路徑。又，保護元件1藉由使可熔導體3含有高熔點金屬及低熔點金屬而形成，而在高熔點金屬之熔斷前，低熔點金屬熔融，利用熔融之低熔點金屬對高熔點金屬之熔蝕作用，可以短時間使可熔導體3熔解。[Action of protection component] If the detection circuit 37 detects the abnormal voltage of any one of the battery cells 34a to 34d, it outputs an interruption signal to the current control element 38. If so, the current control element 38 controls the current by energizing the heating element 10. The protection element 1 flows current from the battery stack 35 to the heating element 10, whereby the heating element 10 starts to generate heat. The protection element 1 fusing the soluble conductor 3 by the heat generated by the heating element 10, blocking the charging and discharging path of the battery stack 35. In addition, the protective element 1 is formed by making the soluble conductor 3 contain a high melting point metal and a low melting point metal, and before the melting of the high melting point metal, the low melting point metal is melted, and the molten low melting point metal is used to corrode the high melting point metal Function, can melt the soluble conductor 3 in a short time.

保護元件1由於藉由可熔導體3熔斷，而亦遮斷向發熱體10之饋電路徑，故停止發熱體10之發熱。Since the protection element 1 is fused by the soluble conductor 3 and also blocks the power feeding path to the heating element 10, the heating of the heating element 10 is stopped.

此外，保護元件1於在電池組33流通超過額定之過電流之情形下，亦將可熔導體3藉由自發熱而熔融，可遮斷電池組33之充放電路徑。In addition, the protective element 1 also melts the soluble conductor 3 by self-heating when the overcurrent exceeds the rated current in the battery pack 33, which can block the charging and discharging path of the battery pack 33.

此處，保護元件1將殼體6之下側外殼4與上側外殼5密接，而具備所期望之接著強度。因而，保護元件1可防止上側外殼5在可熔導體3之熔斷時脫開。又，保護元件1由於將殼體6之下側外殼4與上側外殼5密接，而可滿足特定之殼體之高度條件。Here, the protection element 1 closely contacts the lower shell 4 and the upper shell 5 of the housing 6 and has the desired adhesive strength. Therefore, the protection element 1 can prevent the upper housing 5 from being detached when the soluble conductor 3 is fused. In addition, since the protection element 1 closely contacts the lower housing 4 and the upper housing 5 of the housing 6, it can satisfy a specific height condition of the housing.

如此，保護元件1藉由因發熱體10之通電引起之發熱、或因過電流引起之可熔導體3之自發熱，而將可熔導體3熔斷。此時，保護元件1即便於可熔導體3曝露於向第1、第2外部連接端子7、8及正面電極11回流安裝等高溫環境下之情形下，由於具有低熔點金屬由高熔點金屬被覆之構造，故亦抑制可熔導體3之變形。因而，防止由因可熔導體3之變形所致之電阻值之變動等引起之熔斷特性之變動，可藉由特定之過電流或發熱體10之發熱，快速地熔斷。In this way, the protection element 1 fuses the soluble conductor 3 by the heat generated by the energization of the heating element 10 or the self-heating of the soluble conductor 3 caused by overcurrent. At this time, even when the soluble conductor 3 is exposed to a high temperature environment such as reflow installation to the first and second external connection terminals 7, 8 and the front electrode 11, the protective element 1 has a low melting point metal covered by a high melting point metal This structure also suppresses the deformation of the soluble conductor 3. Therefore, it is possible to prevent the change of the fusing characteristic caused by the change of the resistance value caused by the deformation of the soluble conductor 3, and the fusing can be quickly fused by a specific overcurrent or the heating of the heating element 10.

本發明之保護元件1並不限定於用於鋰離子二次電池之電池組之情形，毋庸置疑亦可應用於需要由電信號進行之電流路徑之遮斷之各種用途。The protection element 1 of the present invention is not limited to the case of a battery pack used in a lithium ion secondary battery, and it can undoubtedly be applied to various applications that require the interruption of a current path by an electric signal.

[變化例4] 其次，針對應用本發明之保護元件之其他之變化例進行說明。此外，在以下之說明中，有針對與上述之保護元件1、50相同之構成，賦予相同之符號，且省略其細節之情形。變化例之保護元件60可如圖23所示般，使複數個熔斷構件18夾持可熔導體3。圖23所示之保護元件60將熔斷構件18分別配設於可熔導體3之一個面及另一面。圖24係保護元件60之電路圖。配設於可熔導體3之正面及背面之各熔斷構件18分別將發熱體10之一端經由形成於各絕緣基板2之發熱體電極15及正面電極11與可熔導體3連接，將發熱體10之另一端經由形成於各絕緣基板2之發熱體饋電電極16及第3外部連接端子17連接於用於使發熱體10發熱之電源。[Variation 4] Next, a description will be given of other variations of the protection element to which the present invention is applied. In addition, in the following description, for the same configuration as the above-mentioned protection elements 1, 50, the same reference numerals are assigned, and the details thereof are omitted. In the protection element 60 of the modified example, as shown in FIG. 23, a plurality of fuse members 18 can clamp the soluble conductor 3. In the protection element 60 shown in FIG. 23, the fuse member 18 is arranged on one surface and the other surface of the soluble conductor 3, respectively. FIG. 24 is a circuit diagram of the protection element 60. The fuse members 18 arranged on the front and back of the soluble conductor 3 respectively connect one end of the heating element 10 to the soluble conductor 3 via the heating element electrode 15 and the front electrode 11 formed on each insulating substrate 2 to connect the heating element 10 The other end is connected to a power source for heating the heating element 10 via the heating element feed electrode 16 and the third external connection terminal 17 formed on each insulating substrate 2.

又，如圖25所示，保護元件60在藉由發熱體10之發熱，將可熔導體3熔斷時，連接於可熔導體3之兩面之各熔斷構件18、18之發熱體10發熱，且自可熔導體3之兩面進行加熱。因而，保護元件60在為了應對大電流用途，而使可熔導體3之剖面積增大之情形下，亦可快速地將可熔導體3加熱並熔斷。Furthermore, as shown in FIG. 25, when the protection element 60 fuses the soluble conductor 3 by the heat generated by the heating element 10, the heating elements 10 of the respective fuse members 18 and 18 connected to both sides of the soluble conductor 3 generate heat, and Heating is performed from both sides of the soluble conductor 3. Therefore, the protection element 60 can also quickly heat and fuse the soluble conductor 3 when the cross-sectional area of the soluble conductor 3 is increased in order to cope with high current applications.

在保護元件60中亦具有與上述之保護元件1、50同樣之殼體6，於下側外殼4或上側外殼5形成嵌合凹部25及凹部狹槽27、或嵌合凸部26及凸部狹槽28。The protective element 60 also has the same housing 6 as the above-mentioned protective elements 1, 50, and the lower housing 4 or the upper housing 5 is formed with a fitting recess 25 and recessed slot 27, or a fitting convex 26 and convex Slot 28.

又，保護元件60自可熔導體3之兩面將熔融導體3a吸引至形成於各熔斷構件18之絕緣基板2之各吸引孔12內。因而，保護元件60即便於為了應對大電流用途，使可熔導體3之剖面積增大，熔融導體3a較多量地產生之情形下，亦可藉由複數個熔斷構件18進行吸引，而確實地使可熔導體3熔斷。又，保護元件60藉由利用複數個熔斷構件18吸引熔融導體3a，而可更快速地使可熔導體3熔斷。In addition, the protection element 60 attracts the fused conductor 3 a from both sides of the soluble conductor 3 into each suction hole 12 formed in the insulating substrate 2 of each fuse member 18. Therefore, even if the protective element 60 increases the cross-sectional area of the soluble conductor 3 and generates a large amount of the fused conductor 3a in order to cope with high current applications, it can be attracted by a plurality of fuse members 18, and it can be surely attracted. The soluble conductor 3 is fused. In addition, the protection element 60 can fuse the soluble conductor 3 more quickly by attracting the fused conductor 3a by using a plurality of fuse members 18.

保護元件60於使用以高熔點金屬被覆構成內層之低熔點金屬之被覆構造，作為可熔導體3之情形下，亦可使可熔導體3快速地熔斷。亦即，由高熔點金屬被覆之可熔導體3即便於發熱體10發熱之情形下，加熱至外層之高熔點金屬熔融之溫度亦需要時間。此處，保護元件60藉由具備複數個熔斷構件18，且同時使各發熱體10發熱，而可將外層之高熔點金屬快速地加熱至熔融溫度。因而，根據保護元件60，可增厚構成外層之高熔點金屬層之厚度，可謀求進一步高額定化，且維持快速熔斷特性。When the protective element 60 uses a low-melting-point metal coating structure formed by a high-melting-point metal coating as the soluble conductor 3, the soluble conductor 3 can also be quickly fused. That is, even when the heat generating body 10 generates heat, the soluble conductor 3 covered by the high melting point metal needs time to be heated to the temperature at which the high melting point metal of the outer layer melts. Here, the protection element 60 is provided with a plurality of fuse members 18 and at the same time each heating element 10 is heated, so that the high melting point metal of the outer layer can be quickly heated to the melting temperature. Therefore, according to the protection element 60, the thickness of the high-melting-point metal layer constituting the outer layer can be increased, the rating can be further increased, and the fast fusing characteristic can be maintained.

又，保護元件60如圖23所示般，較佳為將一對熔斷構件18、18對向地連接於可熔導體3。藉此，保護元件60可以一對熔斷構件18、18自兩面側同時加熱可熔導體3之同一部位，且吸引熔融導體3a，可更快速地將可熔導體3加熱、熔斷。In addition, as shown in FIG. 23, the protective element 60 preferably connects a pair of fuse members 18 and 18 to the soluble conductor 3 so as to face each other. Thereby, the protection element 60 can heat the same part of the soluble conductor 3 from both sides of the pair of fuse members 18 and 18 at the same time, attract the fused conductor 3a, and can heat and fuse the soluble conductor 3 more quickly.

又，保護元件60較佳為形成於一對熔斷構件18、18之各絕緣基板2之正面電極11介隔著可熔導體3相互對向。藉此，藉由一對熔斷構件18、18對稱地連接，而在回流安裝時等，對可熔導體3之負載之施加方式不會失衡，可提高對於變形之耐性。In addition, the protection element 60 is preferably formed on the front electrodes 11 of the insulating substrates 2 of the pair of fuse members 18 and 18 to face each other with the soluble conductor 3 interposed therebetween. As a result, the pair of fuse members 18 and 18 are symmetrically connected, and during reflow installation, the method of applying the load to the soluble conductor 3 does not become unbalanced, and the resistance to deformation can be improved.

此外，發熱體10在形成於絕緣基板2之正面2a、背面2b之任一情形下均形成於吸引孔12之兩側此舉，在加熱正面電極11及背面電極14，且將更多之熔融導體3a凝聚、吸引上較佳。In addition, the heating element 10 is formed on both sides of the suction hole 12 in either of the front surface 2a and the back surface 2b of the insulating substrate 2. This will heat the front electrode 11 and the back electrode 14 and melt more The conductor 3a is better in aggregation and attraction.

1,50,60,100:保護元件 2,105:絕緣基板 2a:正面 2b:背面 2c:第1側緣部 2d第2側緣部 3,103:可熔導體 3a:熔融導體 4,52,111:下側外殼 5,51,112:上側外殼 5a:側壁下端面 6,113:殼體 7,101:第1外部連接端子 8,102:第2外部連接端子 9,107:絕緣層 10,106:發熱體 11,108:正面電極 12:吸引孔 13:導電層 14:背面電極 15:發熱體電極 16,109:發熱體饋電電極 17,110:第3外部連接端子 18:熔斷構件 19,120:接著劑 20:接合材料/連接材料 23:凹面部 25,115:嵌合凹部 26,114:嵌合凸部 27:凹部狹槽/狹槽 28:狹槽/凸部狹槽 29:充電裝置 31:低熔點金屬層 32:高熔點金屬層 33:電池組 33a:正極端子 33b:負極端子 34:電池單元 34a～34d:電池單元 35:電池堆 36:充放電控制電路 37:檢測電路 38:電流控制元件 39,39a,39b:電流控制元件 40:控制部 100:保護元件1,50,60,100: protection element 2,105: Insulating substrate 2a: front 2b: back 2c: 1st side edge 2d 2nd side edge 3,103: Fusible conductor 3a: fused conductor 4,52,111: lower shell 5, 51, 112: upper shell 5a: Lower end surface of side wall 6,113: shell 7,101: The first external connection terminal 8,102: The second external connection terminal 9,107: insulating layer 10,106: heating element 11, 108: Front electrode 12: Attraction hole 13: conductive layer 14: back electrode 15: Heating body electrode 16,109: heating element feed electrode 17,110: 3rd external connection terminal 18: Fuse component 19,120: Adhesive 20: Joining Material/Connecting Material 23: concave face 25, 115: Fitting recess 26, 114: Fitting convex part 27: recess slot/slot 28: slot/convex slot 29: Charging device 31: Low melting point metal layer 32: high melting point metal layer 33: battery pack 33a: Positive terminal 33b: negative terminal 34: battery unit 34a～34d: battery unit 35: battery stack 36: charge and discharge control circuit 37: detection circuit 38: Current control element 39, 39a, 39b: current control element 40: Control Department 100: Protection element

圖1係應用本發明之保護元件之外觀立體圖。 圖2係應用本發明之保護元件之剖視圖。 圖3係省略應用本發明之保護元件之上側外殼而顯示之俯視圖 圖4係顯示在應用本發明之保護元件中，可熔導體已熔斷之狀態之剖視圖。 圖5係顯示下側外殼之圖，(A)係俯視圖，(B)係(A)之E-E’剖視圖。 圖6係顯示上側外殼之圖，(A)係仰視圖，(B)係(A)之C-C’剖視圖。 圖7係顯示下側外殼與上側外殼之接合步驟之圖，(A)係顯示接著劑之流動之下側外殼之俯視圖，(B)係顯示使塗佈有接著劑之下側外殼與上側外殼嵌合之狀態之接著劑之流動的(A)之G-G’剖視圖。 圖8係顯示凹部狹槽之變化例之圖，(A)係上側外殼之仰視圖，(B)係(A)之H-H’剖視圖。 圖9係顯示凹部狹槽之變化例之俯視圖。 圖10係顯示凹部狹槽之變化例之俯視圖。 圖11係顯示下側外殼與上側外殼之接合步驟之圖，(A)係顯示塗佈有接著劑之下側外殼之俯視圖，(B)係使上側外殼與下側外殼對向配置之(A)之F-F’剖視圖。 圖12係顯示在下側外殼設置有凸部狹槽之殼體之圖，(A)係上側外殼之仰視圖，(B)係使上側外殼與下側外殼對向配置之剖視圖，(C)係下側外殼之俯視圖。 圖13係顯示形成有凸部狹槽之嵌合凸部之圖，(A)係俯視圖，(B)係(A)之J-J’剖視圖。 圖14係顯示在下側外殼設置有凸部狹槽之殼體之圖，(A)係上側外殼之仰視圖，(B)係使上側外殼與下側外殼對向配置之剖視圖，(C)係下側外殼之俯視圖。 圖15係顯示形成有凸部狹槽之嵌合凸部之圖，(A)係俯視圖，(B)係(A)之J-J’剖視圖。 圖16係顯示設置有嵌合凸部之上側外殼之圖，(A)係仰視圖，(B)係(A)之L-L’剖視圖。 圖17係顯示設置有嵌合凹部之下側外殼之圖，(A)係俯視圖，(B)係(A)之M-M’剖視圖。 圖18係顯示下側外殼與上側外殼之接合步驟之圖，(A)係顯示接著劑之流動之下側外殼之俯視圖，(B)係使塗佈有接著劑之下側外殼與上側外殼嵌合之狀態之接著劑之流動之(A)之K-K’剖視圖。 圖19係顯示下側外殼與上側外殼之接合步驟之圖，(A)係顯示塗佈有接著劑之下側外殼之俯視圖，(B)係使上側外殼與下側外殼對向配置之(A)之N-N’剖視圖。 圖20係可熔導體之外觀立體圖。 圖21係顯示電池組之構成例之電路圖。 圖22係應用本發明之保護元件之電路圖。 圖23係顯示應用本發明之保護元件之變化例之剖視圖。 圖24係變化例之保護元件之電路圖。 圖25係顯示在變化例之保護元件中，可熔導體已熔斷之狀態之剖視圖。 圖26係顯示應對大電流之保護元件之外觀立體圖。 圖27係圖26所示之保護元件之俯視圖。 圖28係圖27之D-D‘剖視圖。 圖29係將圖26所示之保護元件省略上側外殼而顯示之俯視圖。 圖30係顯示圖26所示之保護元件之殼體之圖，(A)係上側外殼之仰視圖，(B)係以將下側外殼及上側外殼對向配置之狀態顯示之剖視圖，(C)係下側外殼之俯視圖。 圖31係顯示下側外殼與上側外殼之接合步驟之圖，(A)係以將塗佈有接著劑之下側外殼與上側外殼對向配置之狀態顯示之剖視圖，(B)係塗佈有接著劑之下側外殼之俯視圖。 圖32係顯示將下側外殼與上側外殼接合之狀態之圖，(A)係顯示在嵌合凹部內填充有接著劑之上側外殼之仰視圖，(B)係顯示將下側外殼與上側外殼接合之狀態之剖視圖。Fig. 1 is a perspective view of the external appearance of the protective element to which the present invention is applied. Fig. 2 is a cross-sectional view of the protection element to which the present invention is applied. Fig. 3 is a plan view showing the upper shell of the protective element of the present invention is omitted Fig. 4 is a cross-sectional view showing a state in which the soluble conductor has been fused in the protection element to which the present invention is applied. Fig. 5 is a view showing the lower housing, (A) is a top view, and (B) is a cross-sectional view of E-E' of (A). Fig. 6 is a diagram showing the upper housing, (A) is a bottom view, and (B) is a cross-sectional view of C-C' of (A). Figure 7 is a diagram showing the steps of joining the lower shell and the upper shell, (A) shows the top view of the lower shell showing the flow of the adhesive, and (B) shows the lower shell and the upper shell coated with the adhesive (A) G-G' cross-sectional view of the flow of the adhesive in the fitted state. Fig. 8 is a diagram showing a modified example of the recessed portion slot, (A) is a bottom view of the upper housing, (B) is a cross-sectional view of H-H' of (A). Fig. 9 is a plan view showing a variation of the recessed portion slot. Fig. 10 is a plan view showing a variation of the recessed portion slot. Figure 11 is a diagram showing the steps of joining the lower shell and the upper shell, (A) shows the top view of the lower shell coated with the adhesive, (B) is the arrangement with the upper shell and the lower shell facing each other (A) ) Sectional view of F-F'. Figure 12 is a diagram showing a housing with convex slots provided on the lower housing, (A) is a bottom view of the upper housing, (B) is a cross-sectional view of the upper housing and the lower housing facing each other, and (C) is The top view of the lower shell. Fig. 13 is a view showing a fitting convex portion formed with a convex portion slot, (A) is a plan view, and (B) is a J-J' cross-sectional view of (A). Figure 14 is a diagram showing a housing with convex slots provided on the lower housing, (A) is a bottom view of the upper housing, (B) is a cross-sectional view of the upper housing and the lower housing facing each other, and (C) is The top view of the lower shell. Fig. 15 is a diagram showing a fitting convex portion formed with a convex portion slot, (A) is a plan view, and (B) is a J-J' cross-sectional view of (A). Fig. 16 is a diagram showing an upper housing provided with a fitting convex portion, (A) is a bottom view, and (B) is a cross-sectional view of L-L' of (A). Fig. 17 is a view showing a lower housing provided with a fitting recess, (A) is a plan view, and (B) is a M-M' cross-sectional view of (A). Figure 18 is a diagram showing the steps of joining the lower housing and the upper housing, (A) is a plan view of the lower housing showing the flow of the adhesive, and (B) the lower housing and the upper housing coated with the adhesive are embedded The K-K' cross-sectional view of (A) of the flow of the adhesive in the combined state. Figure 19 is a diagram showing the steps of joining the lower shell and the upper shell, (A) shows the top view of the lower shell coated with the adhesive, (B) is the arrangement with the upper shell and the lower shell facing each other (A) ) N-N' section view. Figure 20 is a perspective view of the appearance of the soluble conductor. Fig. 21 is a circuit diagram showing a configuration example of the battery pack. Fig. 22 is a circuit diagram of the protection element to which the present invention is applied. Fig. 23 is a cross-sectional view showing a modified example of the protection element to which the present invention is applied. Fig. 24 is a circuit diagram of a protection element of a modified example. Fig. 25 is a cross-sectional view showing the fused state of the soluble conductor in the protection element of the modified example. Fig. 26 is a perspective view showing the appearance of a protection element for high current. Fig. 27 is a top view of the protection element shown in Fig. 26; Fig. 28 is a cross-sectional view taken along line D-D of Fig. 27. Fig. 29 is a plan view showing the protective element shown in Fig. 26 omitting the upper case and showing. Fig. 30 is a view showing the housing of the protective element shown in Fig. 26, (A) is a bottom view of the upper housing, (B) is a cross-sectional view showing the state where the lower housing and the upper housing are arranged oppositely, (C ) Is the top view of the lower shell. Figure 31 is a diagram showing the steps of joining the lower shell and the upper shell, (A) is a cross-sectional view showing the state where the lower shell and the upper shell coated with the adhesive are arranged facing each other, and (B) is coated with The top view of the housing under the adhesive. Figure 32 is a diagram showing the state of joining the lower housing and the upper housing, (A) shows the bottom view of the upper housing filled with adhesive in the fitting recess, and (B) shows the lower housing and the upper housing Sectional view of the joined state.

1:保護元件 1: protection element

4:下側外殼 4: lower shell

5:上側外殼 5: Upper shell

5a:側壁下端面 5a: Lower end surface of side wall

19:接著劑 19: Adhesive

25:嵌合凹部 25: Fitting recess

26:嵌合凸部 26: Fitting convex part

27:凹部狹槽/狹槽 27: recess slot/slot

Claims (18)

一種保護元件，其具備： 可熔導體；及 殼體，其具有下側外殼及上側外殼，藉由將上述上側外殼及上述下側外殼以接著劑接合而形成；且 於上述上側外殼及上述下側外殼之任一者形成有嵌合凹部，於任另一者形成有嵌合於上述嵌合凹部之嵌合凸部，並且 形成有狹槽，該狹槽與上述嵌合凹部連續且延伸於上述上側外殼及上述下側外殼之對接面，使上述接著劑流動。A protection element, which has: Fusible conductor; and A housing having a lower shell and an upper shell, which is formed by joining the upper shell and the lower shell with an adhesive; and A fitting recess is formed in any one of the upper housing and the lower housing, and a fitting convex part to be fitted in the fitting recess is formed in any of the other, and A slot is formed that is continuous with the fitting recess and extends on the abutting surface of the upper housing and the lower housing to allow the adhesive to flow. 如請求項1之保護元件，其中上述狹槽形成為隨著與上述嵌合凹部分開，而自上述嵌合凹部之底面側至上述嵌合凹部之上正面側逐漸變淺之錐形狀。The protection element of claim 1, wherein the slot is formed in a tapered shape that gradually becomes shallower from the bottom side of the fitting recess to the front side above the fitting recess as it separates from the fitting recess. 如請求項1或2之保護元件，其中上述狹槽隨著與上述嵌合凹部分開而逐漸擴寬。The protection element of claim 1 or 2, wherein the slot is gradually widened as it is separated from the engaging recess. 如請求項1或2之保護元件，其中自1個上述嵌合凹部延伸出複數個上述狹槽。The protection element of claim 1 or 2, wherein a plurality of the above-mentioned slots extend from one of the above-mentioned fitting recesses. 如請求項4之保護元件，其中上述嵌合凹部形成於上述上側外殼或上述下側外殼之轉角部；且 上述狹槽自1個上述嵌合凹部沿著上述殼體之鄰接之2個側壁分別形成。The protection element of claim 4, wherein the fitting recess is formed at a corner of the upper housing or the lower housing; and The slot is formed from one of the fitting recesses along two adjacent side walls of the housing. 如請求項1或2之保護元件，其中上述嵌合凹部形成於上述上側外殼或上述下側外殼之所有轉角部。The protection element of claim 1 or 2, wherein the fitting recesses are formed on all corners of the upper housing or the lower housing. 如請求項1或2之保護元件，其中在俯視下，上述狹槽之寬度為上述嵌合凹部之直徑以下。The protection element of claim 1 or 2, wherein, in a plan view, the width of the slot is equal to or less than the diameter of the fitting recess. 如請求項1或2之保護元件，其中自相鄰之嵌合凹部延伸出之狹槽彼此連續。The protection element of claim 1 or 2, wherein the slots extending from the adjacent fitting recesses are continuous with each other. 一種保護元件，其具備： 可熔導體；及 殼體，其具有下側外殼及上側外殼，藉由將上述上側外殼及上述下側外殼以接著劑接合而形成；且 於上述上側外殼及上述下側外殼之任一者形成嵌合凹部，於任一另一者形成嵌合於上述嵌合凹部之嵌合凸部； 上述嵌合凸部於外周面形成有使上述接著劑流動之狹槽。A protection element, which has: Fusible conductor; and A housing having a lower shell and an upper shell, which is formed by joining the upper shell and the lower shell with an adhesive; and Forming a fitting recess in any one of the upper shell and the lower shell, and forming a fitting convex part to be fitted into the fitting recess in any other one; The said fitting convex part is formed in the outer peripheral surface with the slot which flows the said adhesive agent. 如請求項9之保護元件，其中上述狹槽於一個上述嵌合凸部形成有複數個。The protection element according to claim 9, wherein the above-mentioned slot is formed in plural in one of the above-mentioned fitting convex portions. 如請求項9或10之保護元件，其中上述狹槽於上述嵌合凸部之周面之沿著上述殼體之側壁之方向形成。The protection element of claim 9 or 10, wherein the slot is formed in a direction along the side wall of the housing on the peripheral surface of the fitting convex portion. 如請求項11之保護元件，其中上述嵌合凸部形成於上述上側外殼或上述下側外殼之轉角部；且 上述狹槽於沿著上述殼體之鄰接之2個側壁之方向分別形成。The protection element of claim 11, wherein the fitting convex portion is formed at a corner portion of the upper housing or the lower housing; and The slits are respectively formed in a direction along the two adjacent side walls of the housing. 如請求項9或10之保護元件，其中上述狹槽在俯視下形成為其寬度自上述嵌合凸部之周面至中心方向逐漸變小之錐形狀。The protection element of claim 9 or 10, wherein the slot is formed in a tapered shape with a width gradually decreasing from the circumferential surface of the fitting convex portion to the center direction when viewed from above. 如請求項9或10之保護元件，其中上述狹槽在俯視下形成為自上述嵌合凸部之頂部至基部逐漸擴寬之錐形狀。The protection element of claim 9 or 10, wherein the slot is formed in a tapered shape that gradually widens from the top of the fitting convex portion to the base in a plan view. 一種保護元件，其具備： 可熔導體；及 殼體，其具有下側外殼及上側外殼，藉由將上述上側外殼及上述下側外殼以接著劑接合而形成；且 於上述上側外殼及上述下側外殼之任一者形成有嵌合凹部，於任另一者形成有嵌合於上述嵌合凹部之嵌合凸部，並且 形成有狹槽，該狹槽與上述嵌合凹部連續且延伸於上述上側外殼及上述下側外殼之對接面，使上述接著劑流動； 上述嵌合凸部於外周面形成有使上述接著劑流動之狹槽。A protection element, which has: Fusible conductor; and A housing having a lower shell and an upper shell, which is formed by joining the upper shell and the lower shell with an adhesive; and A fitting recess is formed in any one of the upper housing and the lower housing, and a fitting convex part to be fitted in the fitting recess is formed in any of the other, and A slot is formed, the slot is continuous with the fitting recess and extends on the abutting surface of the upper housing and the lower housing to allow the adhesive to flow; The said fitting convex part is formed in the outer peripheral surface with the slot which flows the said adhesive agent. 一種電池組，其具備： 1個以上之電池單元；及 保護元件，其連接於上述電池單元之充放電路徑上，遮斷該充放電路徑；且 上述保護元件具備： 可熔導體；及 殼體，其具有下側外殼及上側外殼，藉由將上述上側外殼及上述下側外殼以接著劑接合而形成；且 於上述上側外殼及上述下側外殼之任一者形成有嵌合凹部，於任另一者形成有嵌合於上述嵌合凹部之嵌合凸部，並且 形成有狹槽，該狹槽與上述嵌合凹部連續且延伸於上述上側外殼及上述下側外殼之對接面，使上述接著劑流動。A battery pack having: 1 or more battery cells; and A protection element, which is connected to the charging and discharging path of the above-mentioned battery unit to block the charging and discharging path; and The above protection components have: Fusible conductor; and A housing having a lower shell and an upper shell, which is formed by joining the upper shell and the lower shell with an adhesive; and A fitting recess is formed in any one of the upper housing and the lower housing, and a fitting convex part to be fitted in the fitting recess is formed in any of the other, and A slot is formed that is continuous with the fitting recess and extends on the abutting surface of the upper housing and the lower housing to allow the adhesive to flow. 一種電池組，其具備： 1個以上之電池單元；及 保護元件，其連接於上述電池單元之充放電路徑上，遮斷該充放電路徑；且 上述保護元件具備： 可熔導體；及 殼體，其具有下側外殼及上側外殼，藉由將上述上側外殼及上述下側外殼以接著劑接合而形成；且 於上述上側外殼及上述下側外殼之任一者形成有嵌合凹部，於任另一者形成有嵌合於上述嵌合凹部之嵌合凸部； 上述嵌合凸部形成有使上述接著劑沿突出方向流動之狹槽。A battery pack having: 1 or more battery cells; and A protection element, which is connected to the charging and discharging path of the above-mentioned battery unit to block the charging and discharging path; and The above protection components have: Fusible conductor; and A housing having a lower shell and an upper shell, which is formed by joining the upper shell and the lower shell with an adhesive; and A fitting recess is formed in any one of the upper shell and the lower shell, and a fitting convex part is formed in any other of the fitting recess; The said fitting convex part is formed with the slot which makes the said adhesive agent flow in a protrusion direction. 一種電池組，其具備： 1個以上之電池單元；及 保護元件，其連接於上述電池單元之充放電路徑上，遮斷該充放電路徑；且 上述保護元件具備： 可熔導體；及 殼體，其具有下側外殼及上側外殼，藉由將上述上側外殼及上述下側外殼以接著劑接合而形成；且 於上述上側外殼及上述下側外殼之任一者形成有嵌合凹部，於任另一者形成有嵌合於上述嵌合凹部之嵌合凸部，並且 形成有狹槽，該狹槽與上述嵌合凹部連續且延伸於上述上側外殼及上述下側外殼之對接面，使上述接著劑流動； 上述嵌合凸部形成有使上述接著劑沿突出方向流動之狹槽。A battery pack having: 1 or more battery cells; and A protection element, which is connected to the charging and discharging path of the above-mentioned battery unit to block the charging and discharging path; and The above protection components have: Fusible conductor; and A housing having a lower shell and an upper shell, which is formed by joining the upper shell and the lower shell with an adhesive; and A fitting recess is formed in any one of the upper housing and the lower housing, and a fitting convex part to be fitted in the fitting recess is formed in any of the other, and A slot is formed, the slot is continuous with the fitting recess and extends on the abutting surface of the upper housing and the lower housing to allow the adhesive to flow; The said fitting convex part is formed with the slot which makes the said adhesive agent flow in a protrusion direction.
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