WO2023037899A1 - 保護素子 - Google Patents
保護素子 Download PDFInfo
- Publication number
- WO2023037899A1 WO2023037899A1 PCT/JP2022/032145 JP2022032145W WO2023037899A1 WO 2023037899 A1 WO2023037899 A1 WO 2023037899A1 JP 2022032145 W JP2022032145 W JP 2022032145W WO 2023037899 A1 WO2023037899 A1 WO 2023037899A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- insulating
- conductor sheets
- soluble conductor
- point metal
- terminal
- Prior art date
Links
- 230000001681 protective effect Effects 0.000 title claims abstract description 36
- 239000004020 conductor Substances 0.000 claims abstract description 115
- 239000002184 metal Substances 0.000 claims description 55
- 229910052751 metal Inorganic materials 0.000 claims description 55
- 239000010410 layer Substances 0.000 claims description 52
- 238000003825 pressing Methods 0.000 claims description 44
- 239000000463 material Substances 0.000 claims description 28
- 229920005989 resin Polymers 0.000 claims description 24
- 239000011347 resin Substances 0.000 claims description 24
- 239000010949 copper Substances 0.000 claims description 18
- 229910052802 copper Inorganic materials 0.000 claims description 15
- 229910052709 silver Inorganic materials 0.000 claims description 12
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 9
- 239000002356 single layer Substances 0.000 claims description 8
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 claims description 6
- 229910052731 fluorine Inorganic materials 0.000 claims description 6
- 239000011737 fluorine Substances 0.000 claims description 6
- 239000004332 silver Substances 0.000 claims description 6
- 238000009413 insulation Methods 0.000 claims description 3
- 229920006122 polyamide resin Polymers 0.000 claims description 3
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims description 2
- 238000002844 melting Methods 0.000 description 21
- 230000008018 melting Effects 0.000 description 21
- 238000010891 electric arc Methods 0.000 description 17
- 238000003780 insertion Methods 0.000 description 11
- 230000037431 insertion Effects 0.000 description 11
- 239000000853 adhesive Substances 0.000 description 10
- 230000001070 adhesive effect Effects 0.000 description 10
- 229910045601 alloy Inorganic materials 0.000 description 7
- 239000000956 alloy Substances 0.000 description 7
- 238000005476 soldering Methods 0.000 description 6
- 229910001128 Sn alloy Inorganic materials 0.000 description 5
- 229920002647 polyamide Polymers 0.000 description 5
- 239000004953 Aliphatic polyamide Substances 0.000 description 4
- 229910000881 Cu alloy Inorganic materials 0.000 description 4
- 229920003231 aliphatic polyamide Polymers 0.000 description 4
- 238000002347 injection Methods 0.000 description 4
- 239000007924 injection Substances 0.000 description 4
- 229910001316 Ag alloy Inorganic materials 0.000 description 3
- 230000003139 buffering effect Effects 0.000 description 3
- 239000002923 metal particle Substances 0.000 description 3
- 150000002739 metals Chemical class 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000003870 refractory metal Substances 0.000 description 3
- 229910001369 Brass Inorganic materials 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 239000004677 Nylon Substances 0.000 description 2
- 239000004954 Polyphthalamide Substances 0.000 description 2
- -1 Polytetrafluoroethylene Polymers 0.000 description 2
- 239000010951 brass Substances 0.000 description 2
- 229910002804 graphite Inorganic materials 0.000 description 2
- 239000010439 graphite Substances 0.000 description 2
- 238000005304 joining Methods 0.000 description 2
- 239000000155 melt Substances 0.000 description 2
- 229920001778 nylon Polymers 0.000 description 2
- 229920006375 polyphtalamide Polymers 0.000 description 2
- 229920006012 semi-aromatic polyamide Polymers 0.000 description 2
- 229910001152 Bi alloy Inorganic materials 0.000 description 1
- 229920001007 Nylon 4 Polymers 0.000 description 1
- 229920003189 Nylon 4,6 Polymers 0.000 description 1
- 229920002292 Nylon 6 Polymers 0.000 description 1
- 229920002302 Nylon 6,6 Polymers 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 238000005054 agglomeration Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 229910010293 ceramic material Inorganic materials 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000003779 heat-resistant material Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 229920006111 poly(hexamethylene terephthalamide) Polymers 0.000 description 1
- 229920005668 polycarbonate resin Polymers 0.000 description 1
- 239000004431 polycarbonate resin Substances 0.000 description 1
- 229920013716 polyethylene resin Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 1
- 239000004810 polytetrafluoroethylene Substances 0.000 description 1
- 229910000679 solder Inorganic materials 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 229920001187 thermosetting polymer Polymers 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
Classifications
-
- 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H85/00—Protective devices in which the current flows through a part of fusible material and this current is interrupted by displacement of the fusible material when this current becomes excessive
- H01H85/02—Details
- H01H85/04—Fuses, i.e. expendable parts of the protective device, e.g. cartridges
- H01H85/05—Component parts thereof
- H01H85/055—Fusible members
- H01H85/06—Fusible members characterised by the fusible material
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H85/00—Protective devices in which the current flows through a part of fusible material and this current is interrupted by displacement of the fusible material when this current becomes excessive
- H01H85/02—Details
- H01H85/04—Fuses, i.e. expendable parts of the protective device, e.g. cartridges
- H01H85/05—Component parts thereof
- H01H85/055—Fusible members
- H01H85/08—Fusible members characterised by the shape or form of the fusible member
-
- 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
- H01H85/10—Fusible members characterised by the shape or form of the fusible member with constriction for localised fusing
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H85/00—Protective devices in which the current flows through a part of fusible material and this current is interrupted by displacement of the fusible material when this current becomes excessive
- H01H85/02—Details
- H01H85/04—Fuses, i.e. expendable parts of the protective device, e.g. cartridges
- H01H85/05—Component parts thereof
- H01H85/055—Fusible members
- H01H85/12—Two or more separate fusible members in parallel
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H85/00—Protective devices in which the current flows through a part of fusible material and this current is interrupted by displacement of the fusible material when this current becomes excessive
- H01H85/02—Details
- H01H85/04—Fuses, i.e. expendable parts of the protective device, e.g. cartridges
- H01H85/05—Component parts thereof
- H01H85/143—Electrical contacts; Fastening fusible members to such contacts
-
- H—ELECTRICITY
- 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
- H01H85/17—Casings characterised by the casing material
-
- 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
Definitions
- the present invention relates to protection elements.
- This application claims priority based on Japanese Patent Application No. 2021-145576 filed in Japan on September 7, 2021, the content of which is incorporated herein.
- fuse elements that generate heat and melt to cut off the current path when a current exceeding the rating flows in the current path.
- a protective element (fuse element) having a fuse element is used in a wide range of fields such as home electric appliances and electric vehicles.
- Patent Document 1 As a fuse element mainly used in electric circuits for automobiles, etc., two elements connected between terminal portions located at both ends and a A fuse element is described that includes a fusing portion.
- Patent Literature 1 describes a fuse in which a set of two fuse elements is housed inside a casing, and an arc-extinguishing material is enclosed between the fuse element and the casing.
- arc discharge is likely to occur when the fuse element is blown. If a large-scale arc discharge occurs, the insulating case housing the fuse element may be destroyed. For this reason, a low-resistance, high-melting-point metal such as copper is used as the material of the fuse element to suppress the occurrence of arc discharge.
- a robust and highly heat-resistant material such as ceramics is used, and the size of the insulating case is increased.
- the present invention provides the following means.
- a fuse element laminate an insulating case accommodating the fuse element laminate, a first terminal, and a second terminal, wherein a plurality of the fuse element laminates are arranged in parallel in the thickness direction. and a first insulating member disposed in proximity to or in contact with each of the plurality of soluble conductor sheets, wherein each of the plurality of soluble conductor sheets is connected to each other.
- the first terminal has one end connected to the first end and the other end exposed outside from the insulating case.
- the protective element wherein the two terminals have one end connected to the second end and the other end exposed outside from the insulating case.
- the first insulating member and the second insulating member extend from the first end to the second end at a central portion between the first end and the second end of the fusible conductor sheet.
- the protection element according to [2] which is separated so as to block the direction toward.
- the protection element according to [2] or [3] which has a pressing member disposed inside the insulating case and pressing the second insulating member toward the soluble conductor sheet.
- Each of the plurality of soluble conductor sheets is a laminate containing a low-melting-point metal layer and a high-melting-point metal layer, wherein the low-melting-point metal layer contains tin and the high-melting-point metal layer is silver or copper. 5, the protective element according to any one of [1] to [6]. [8] Each of the plurality of soluble conductor sheets has two or more high-melting-point metal layers, one or more low-melting-point metal layers, and the low-melting-point metal layer is the same as the high-melting-point metal layer.
- Each of the plurality of soluble conductor sheets has a fusing portion between the first end and the second end, and the first end of the first end and the second end.
- the protection element according to any one of [1] to [9], wherein the cross-sectional area of the fusing portion in the current flow direction is smaller than the cross-sectional area in the current flow direction from the portion toward the second end.
- the present invention it is possible to provide a protective element in which large-scale arc discharge is less likely to occur when the fuse element melts, and the size and weight of the insulating case can be reduced.
- FIG. 1 is a perspective view of a protective element according to one embodiment of the invention.
- 2 is an exploded perspective view of the protective element shown in FIG. 1.
- FIG. 3 is an exploded perspective view of the fuse element stack shown in FIG. 2.
- FIG. 4 is a plan view of the fusible conductor sheet shown in FIG. 3.
- FIG. 5 is a cross-sectional view of the protective element taken along line V-V' of FIG.
- FIG. 6 is a vertical cross-sectional view of the protective element taken along line VI-VI' of FIG.
- FIG. 7 is a vertical cross-sectional view showing a state in which the fuse element laminate of the protection element shown in FIG. 1 is blown.
- (protective element) 1 to 6 are schematic diagrams showing a protective element according to one embodiment of the present invention.
- the direction indicated by X is the energization direction of the fuse element.
- the direction indicated by Y is a direction orthogonal to the X direction, and is also called the width direction.
- the direction indicated by Z is a direction orthogonal to the X direction and the Y direction, and is also called the thickness direction.
- FIG. 1 is a perspective view of a protective element according to one embodiment of the present invention.
- 2 is an exploded perspective view of the protective element shown in FIG. 1.
- FIG. 3 is an exploded perspective view of the fuse element stack shown in FIG. 2.
- FIG. 4 is a plan view of the fusible conductor sheet shown in FIG. 3.
- FIG. 5 is a cross-sectional view of the protective element taken along line V-V' of FIG.
- FIG. 6 is a vertical cross-sectional view of the protective element taken along line VI-VI' of FIG.
- the protection element 100 of the present embodiment shown in FIGS. 1 to 6 includes an insulating case 10, a fuse element laminate 40 housed in the insulating case 10, a first pressing member 71, a second pressing member 72, and a second pressing member 72. It has a first terminal 91 and a second terminal 92 .
- the energization direction means the direction in which electricity flows during use (X direction), and the cross-sectional area in the energization direction is the plane (Y- Z plane).
- the insulating case 10 has a substantially cylindrical shape.
- the insulating case 10 consists of a cover 20 and a holding member 30 .
- the cover 20 has a cylindrical shape with both ends opened.
- the inner edge of the opening of the cover 20 is a chamfered inclined surface 21 .
- a center portion of the cover 20 is a housing portion 22 in which the holding member 30 is housed.
- the holding member 30 consists of a first holding member 30a and a second holding member 30b.
- the first holding member 30a and the second holding member 30b have the same shape and are substantially semi-cylindrical.
- Terminal mounting surfaces 32 are provided on top surfaces of both end portions (first end portion 31a and second end portion 31b) of the first holding member 30a and the second holding member 30b in the energization direction (X direction).
- a semicircular terminal adhesive injection port 33 connected to the terminal mounting surface 32 is provided.
- Notches 34a are formed at both ends in the width direction (Y direction) of the first end portion 31a and the second end portion 31b.
- the notch 34a forms a hollow case adhesive injection port 34 having a groove-like shape with a semicircular cross section when viewed from the direction of current flow. do. Further, a convex portion 35 is provided on the top surface of the first end portion 31a, and a concave portion 36 is provided on the top surface of the second end portion 31b.
- a fuse element accommodating portion 37 is provided at the center of the first holding member 30a and the second holding member 30b in the direction of current flow.
- the fuse element accommodating portion 37 includes a guide pin insertion hole 38 for receiving a guide pin 41 for fixing the fuse element laminate 40, and pressing members (a first pressing member 71 and a second pressing member 72) for pressing the fuse element laminate 40.
- a pressing member insertion hole 39 for receiving the pressure member is provided.
- the side surface of the fuse element accommodating portion 37 is shaved, thereby forming an internal pressure buffering space 80 inside the insulating case 10 .
- the internal pressure buffering space 80 has the effect of suppressing a rapid increase in the internal pressure of the protection element 100 due to gas generated by arc discharge that occurs when the fuse element laminate 40 is fused.
- the cover 20 and the holding member 30 are preferably made of a material with a tracking resistance index CTI (resistance to tracking (carbonized conductive path) breakdown) of 500 V or more.
- the tracking resistance index CTI can be determined by a test based on IEC60112.
- a resin material can be used as the material of the cover 20 and the holding member 30 .
- the resin material has a smaller heat capacity and a lower melting point than the ceramic material. Therefore, if a resin material is used as the material of the holding member 30, the surface of the holding member 30 may be deformed or the surface of the holding member 30 may be deformed when gasified metal and molten metal particles adhere to the holding member 30. Agglomeration of the metal particles in granular form tends to make the metal and metal particles adhered to the holding member 30 sparse, making it difficult to form a conduction path, which is preferable.
- a polyamide-based resin or a fluorine-based resin can be used as the resin material.
- the polyamide-based resin may be an aliphatic polyamide or a semi-aromatic polyamide.
- aliphatic polyamides include nylon 4, nylon 6, nylon 46 and nylon 66.
- semi-aromatic polyamides include nylon 6T, nylon 9T and polyphthalamide (PPA) resins.
- Polytetrafluoroethylene can be given as an example of the fluororesin.
- polyamide-based resins and fluorine-based resins have high heat resistance and are difficult to burn. In particular, aliphatic polyamides are less likely to produce graphite when burned. Therefore, by forming the cover 20 and the holding member 30 using aliphatic polyamide, it is possible to form a new current path by graphite generated by arc discharge when the fuse element laminate 40 is fused. It can definitely be prevented.
- the fuse element laminate 40 has six fusible conductor sheets 50a, 50b, 50c, 50d, 50e, 50f arranged in parallel in the thickness direction (Z direction).
- First insulating members 61a, 61b, 61c, 61d and 61e are arranged between each of the soluble conductor sheets 50a to 50f.
- the first insulating members 61a-61e are arranged in close proximity to or in contact with each of the soluble conductor sheets 50a-50f. In the close proximity state, the distance between the first insulating members 61a to 61e and the soluble conductor sheets 50a to 50f is preferably 0.5 mm or less, more preferably 0.2 mm or less.
- the second insulating member 62a is in proximity to or in contact with the soluble conductor sheet 50a. are placed in Furthermore, between the soluble conductor sheet 50f arranged at the top of the soluble conductor sheets 50a to 50f and the second holding member 30b, the second insulating member 62b is in proximity to or in contact with the soluble conductor sheet 50f. are placed in The width (length in the Y direction) of the soluble conductor sheets 50a-50f is narrower than the widths of the first insulating members 61a-61e and the second insulating members 62a, 62b.
- the space itself in which arc discharge occurs during fusing can be made extremely narrow.
- the plasma that constitutes the arc discharge is generated by the ionization of the gas in the space, so by making the space itself where the arc discharge is generated extremely narrow, the amount of plasma generated can be reduced and the scale of the arc discharge can be kept small. can be done.
- Each of the soluble conductor sheets 50a-50f has a first end 51 and a second end 52 facing each other.
- the first end portions 51 of the lower three fusible conductor sheets 50a to 50c among the fusible conductor sheets 50a to 50f arranged in parallel in the thickness direction are connected to the lower surface of the first terminal 91, and the three fusible conductor sheets from above First ends 51 of the conductor sheets 50 d to 50 f are connected to the upper surface of the first terminal 91 .
- the second ends 52 of the lower three soluble conductor sheets 50a to 50c of the soluble conductor sheets 50a to 50f are connected to the lower surface of the second terminal 92, and the upper three soluble conductor sheets 50d to 50f The second end 52 is connected to the upper surface of the second terminal 92 .
- the connection positions of the soluble conductor sheets 50a to 50f and the first terminal 91 and the second terminal 92 are not limited to this.
- all of the first ends 51 of the soluble conductor sheets 50 a to 50 f may be connected to the upper surface of the first terminal 91 or may be connected to the lower surface of the first terminal 91 .
- all of the second ends 52 of the soluble conductor sheets 50a to 50f may be connected to the upper surface of the second terminal 92 or may be connected to the lower surface of the second terminal 92.
- Each of the soluble conductor sheets 50a-50f may be a laminate including a low melting point metal layer and a high melting point metal layer, or may be a single layer.
- the low melting point metal layer of the laminate contains Sn.
- the low-melting-point metal layer may be Sn alone or a Sn alloy.
- a Sn alloy is an alloy containing Sn as a main component.
- a Sn alloy is an alloy with the highest Sn content among metals contained in the alloy. Examples of Sn alloys include Sn--Bi alloys, In--Sn alloys, and Sn--Ag--Cu alloys.
- the refractory metal layer contains Ag or Cu.
- the refractory metal layer may be Ag alone, Cu alone, Ag alloy, or Cu alloy.
- the Ag alloy is an alloy with the highest Ag content among the metals contained in the alloy
- the Cu alloy is the alloy with the highest Cu content among the metals contained in the alloy.
- the laminate may have a two-layer structure of low-melting-point metal layer/high-melting-point metal layer, or may have two or more high-melting-point metal layers, one or more low-melting-point metal layers, and the low-melting-point metal layer may be a multi-layered structure of three or more layers arranged between high-melting-point metal layers.
- a single layer it contains Ag or Cu.
- the single layer may be Ag alone, Cu alone, Ag alloy, or Cu alloy.
- Each of the soluble conductor sheets 50a to 50f may have a through hole 54 in the central portion 53 between the first end portion 51 and the second end portion 52.
- the cross-sectional area of the central portion 53 is smaller than the cross-sectional areas of the first end portion 51 and the second end portion 52 .
- the cross-sectional area of the central portion 53 becomes smaller, when a large current exceeding the rating flows through each of the fusible conductor sheets 50a to 50f, the amount of heat generated in the central portion 53 increases. It becomes easy to melt (disappear).
- each of the soluble conductor sheets 50a to 50f have the same cross-sectional area in the X direction (current-carrying direction).
- the cross-sectional areas of the soluble conductor sheets 50a-50f may be within ⁇ 10% of the average value of the cross-sectional areas of the soluble conductor sheets 50a-50f.
- the thickness of the soluble conductor sheets 50a to 50f is not particularly limited, but can be, for example, within the range of 0.01 mm or more and 1.0 mm or less.
- the thickness of the soluble conductor sheets 50a to 50f in the case of a single layer containing Ag or Cu is 0.01 mm or more and 0.1 mm or less, and the soluble conductor sheet in the case of a laminate containing a low melting point metal layer and a high melting point metal layer.
- the thickness of 50a to 50f is preferably 0.1 mm or more and 0.5 mm or less.
- Each of the first insulating members 61a to 61e and the second insulating members 62a and 62b is composed of a first insulating piece 63a and a second insulating piece 63b facing each other with a gap 65 interposed therebetween.
- Each of the first insulating piece 63a and the second insulating piece 63b has a guide pin through hole 64 into which the guide pin 41 is inserted.
- the gap 65 is located at a position facing the central portion 53 between the first end portion 51 and the second end portion 52 of the fusible conductor sheets 50a to 50f.
- each of the first insulating members 61a to 61e and the second insulating members 62a and 62b is separated at a position facing the central portion 53 between the first end portion 51 and the second end portion 52 of the soluble conductor sheets 50a to 50f. It is
- the first insulating members 61a to 61e and the second insulating members 62a and 62b are preferably made of a material having a tracking resistance index CTI of 500V or higher.
- a resin material can be used as the material of the first insulating members 61a to 61e and the second insulating members 62a and 62b. Examples of the resin material are the same as those of the cover 20 and the holding member 30 .
- an insulating wire such as a resin wire or a glass wire
- a material of the resin wire for example, polyamide resin, polyethylene resin, polypropylene resin, and polycarbonate resin can be used.
- the diameter of the guide pin 41 may be, for example, within the range of 0.5 mm or more and 1.2 mm or less.
- the guide pin 41 may be, for example, a nylon wire.
- the fuse element laminate 40 can be manufactured, for example, as follows. First, the guide pin 41 is inserted into the guide pin insertion hole 38 of the first holding member 30a. Next, while inserting the guide pin through holes 64 of the first insulating members 61a to 61e and the second insulating members 62a and 62b into the guide pin through holes 64, the soluble conductor sheets 50a to 50a are placed on the second insulating member 62a. 50f and the first insulating members 61a to 61e are laminated alternately in the thickness direction, and the second insulating member 62b is arranged on the uppermost soluble conductor sheet 50f to obtain a laminate.
- a metal jig having an equivalent shape or a shape in which the guide pin 41 is erected at an appropriate position may be used.
- the first pressing member 71 is inserted into the pressing member insertion hole 39 of the first holding member 30a, and the other end of the first pressing member 71 is inserted into the gap 65 side of the second insulating piece 63b of the second insulating member 62a. bordering on The first pressing member 71 presses the second insulating piece 63b upward (toward the soluble conductor sheet 50a).
- the pressure of the first pressing member 71 is, for example, a pressure that does not cut the soluble conductor sheets 50a to 50f. is the pressure that can push up the second insulating piece 63b.
- One end of the second pressing member 72 is inserted into the pressing member insertion hole 39 of the second holding member 30b, and the other end is inserted into the gap 65 side of the first insulating piece 63a of the second insulating member 62b. bordering on The second pressing member 72 presses the first insulating piece 63a downward (toward the soluble conductor sheet 50f).
- the pressure of the second pressing member 72 is, for example, a pressure that does not cut the soluble conductor sheets 50a to 50f. is the pressure that can push down the first insulating piece 63a.
- a compression coil spring and rubber can be used as the first pressing member 71 and the second pressing member 72 .
- the first terminal 91 has one end connected to the first ends 51 of the fusible conductor sheets 50 a to 50 f and the other end exposed to the outside of the insulating case 10 .
- the second terminal 92 has one end connected to the second ends 52 of the fusible conductor sheets 50 a to 50 f and the other end exposed to the outside of the insulating case 10 .
- the first terminal 91 and the second terminal 92 may have substantially the same shape, or may have different shapes.
- the thickness of the first terminal 91 and the second terminal 92 is not particularly limited, but may be, for example, in the range of 0.3 mm or more and 1.0 mm or less.
- the thickness of the first terminal 91 and the thickness of the second terminal 92 may be the same or different.
- the first terminal 91 has an external terminal hole 91a.
- the second terminal 92 has an external terminal hole 92a.
- One of the external terminal hole 91a and the external terminal hole 92a is used for connection to the power supply side, and the other is used for connection to the load side.
- the external terminal hole 91a and the external terminal hole 92a may be used to be connected to the current path inside the load.
- the external terminal hole 91a and the external terminal hole 92a can be through holes that are substantially circular in plan view.
- first terminal 91 and the second terminal 92 for example, those made of copper, brass, nickel, or the like can be used.
- a material for the first terminal 91 and the second terminal 92 it is preferable to use brass from the viewpoint of strengthening rigidity, and it is preferable to use copper from the viewpoint of reducing electrical resistance.
- the first terminal 91 and the second terminal 92 may be made of the same material, or may be made of different materials.
- FIG. 7 is a vertical cross-sectional view showing a state in which the fuse element laminate 40 of the protection element 100 is blown.
- the vertical cross-sectional view of FIG. 7 corresponds to the vertical cross-sectional view taken along line VI-VI' of FIG.
- the central portions of the fusible conductor sheets 50a to 50f of the fuse element laminate 40 are melted.
- the pressure of the first pressing member 71 pushes up the first insulating members 61a to 61e and the second insulating pieces 63b of the second insulating members 62a and 62b. .
- the pressing of the second pressing member 72 presses downward the first insulating members 61a to 61e and the first insulating pieces 63a of the second insulating members 62a and 62b.
- the first insulating pieces to be laminated and the second insulating pieces to be laminated are brought into proximity and contact, the space of the current path is physically shielded, and the arc discharge generated by the fusing of the soluble conductor sheets 50a to 50f is prevented early. can be extinguished by
- the protective element 100 of this embodiment can be manufactured as follows. First, the first holding member 30a, the guide pin 41 or the fuse element laminate 40 positioned by a jig having an equivalent shape, and the first terminal 91 and the second terminal 92 are prepared. Then, the first end portion 51 of each of the soluble conductor sheets 50a to 50f of the fuse element laminate 40 and the first terminal 91 are connected by soldering. Also, the second end portion 52 and the second terminal 92 are connected by soldering.
- a solder material used for soldering a known material can be used, and from the viewpoint of resistivity, melting point, and environment-friendly lead-free, it is preferable to use a material containing Sn as a main component.
- connection between the first ends 51 of the soluble conductor sheets 50a to 50f and the first terminals 91 and the connection between the second ends 52 of the soluble conductor sheets 50a to 50f and the second terminals 92 are limited to soldering. Instead, a known joining method such as joining by welding may be used.
- the first holding member 30a and the second holding member 30b are prepared.
- a fuse element laminate 40 in which the first terminal 91 and the second terminal 92 are connected is arranged in the fuse element accommodating portion 37 of the first holding member 30a.
- the guide pin 41 of the fuse element laminate 40 is inserted into the guide pin insertion hole 38 of the first holding member 30a.
- the second holding member 30b is arranged on the first holding member 30a on which the fuse element laminate 40 is arranged so that the fuse element accommodating portion 37 of the second holding member 30b faces the fuse element laminate 40. .
- the guide pin 41 of the fuse element stack 40 is inserted into the guide pin insertion hole 38 of the second holding member 30b, and the convex portion 35 of the first holding member 30a and the concave portion 36 of the second holding member 30b are engaged. Then, the concave portion 36 of the first holding member 30a and the convex portion 35 of the second holding member 30b are engaged. Thus, the holding member 30 is formed.
- the first pressing member 71 and the second pressing member 72 are prepared.
- the first pressing member 71 is accommodated in the pressing member insertion hole 39 of the first holding member 30a in a compressed state
- the second pressing member 72 is accommodated in the pressing member insertion hole 39 of the second holding member 30b in a compressed state.
- the cover 20 is prepared. Then, the holding member 30 is inserted into the housing portion 22 of the cover 20 . Next, the adhesive is injected into the terminal adhesive inlet 33 of the holding member 30 to fill the gaps between the terminal mounting surface 32 and the first terminal 91 and the second terminal. Also, the cover 20 and the holding member 30 are adhered by injecting the adhesive into the case adhesive injection port 34 and the inclined surface 21 of the cover 20 .
- the adhesive for example, an adhesive containing a thermosetting resin can be used. In this way, the insulating case 10 with the inside of the cover 20 hermetically sealed is formed.
- the protective element 100 of the present embodiment is obtained through the above steps.
- the fuse element laminate 40 includes a plurality of soluble conductor sheets 50a to 50f arranged in parallel in the thickness direction, and each of the soluble conductor sheets 50a to 50f is arranged therebetween. It is insulated by adjoining or contacting (adhering) the first insulating members 61a to 61e. As a result, the current value flowing through each of the soluble conductor sheets 50a-50f becomes smaller, the space surrounding the soluble conductor sheets 50a-50f becomes extremely narrow, and the scale of arc discharge caused by fusing tends to become smaller. Therefore, according to the protective element 100 of the present embodiment, it is possible to reduce the size and weight of the insulating case 10 .
- the protection element 100 of the present embodiment between the soluble conductor sheet 50a arranged at the bottom among the soluble conductor sheets 50a to 50f and the first holding member 30a of the insulating case 10, and between the soluble conductor sheets 50a to 50f
- the fusible conductor sheets 50a and 50f are placed on the second holding member 30b. Since the first holding member 30a and the second holding member 30b do not come into direct contact with each other, it is difficult for arc discharge to form a carbide that serves as a conductive path on the inner surface of the insulating case 10. Therefore, the size of the insulating case 10 can be reduced. Also, leakage current is less likely to occur.
- the first insulating members 61a to 61e and the second insulating members 62a and 62b face the central portion 53 between the first end portion 51 and the second end portion 52 of the soluble conductor sheets 50a to 50f. If the soluble conductor sheets 50a to 50f are fused at the central portion 53, continuous molten spatters on the surfaces of the first insulating members 61a to 61e and the second insulating members 62a and 62b are formed. Adhesion can be suppressed. Therefore, it is possible to quickly extinguish the arc discharge generated by fusing the fusible conductor sheets 50a to 50f, and increase the insulation resistance of the protective element 100 after breaking.
- the protective element 100 of the present embodiment when the first pressing member 71 and the second pressing member 72 are arranged, when the soluble conductor sheets 50a to 50f are fused, the soluble conductor sheets 50a to 50f are divided into upper and lower parts. can be pressed and moved by pressing, and the fusion parts (disappearing parts) on the first end 51 side of the soluble conductor sheets 50a to 50f are brought into proximity and contact between the laminated first insulating pieces and between the laminated second insulating pieces. However, the space of the conducting path is physically shielded. Therefore, it is possible to quickly extinguish the arc discharge generated by melting of the fusible conductor sheets 50a to 50f.
- the protective element 100 of the present embodiment has the first pressing member 71 and the second pressing member 72, even if only one of the first pressing member 71 and the second pressing member 72 is arranged, good.
- At least one of the first insulating members 61a to 61e, the second insulating members 62a and 62b, the cover 20 of the insulating case 10, and the holding member 30 is made of a material having an index CTI of 500 V or higher. If formed, the arc discharge will not easily form a carbide that will act as a conductive path on the surface of these parts, so even if the size of the insulating case 10 is reduced, the leakage current will be less likely to occur.
- At least one of the first insulating members 61a to 61e, the second insulating members 62a and 62b, the cover 20 of the insulating case 10, and the holding member 30 is made of polyamide resin or fluorine resin.
- the polyamide-based resin or fluorine-based resin has excellent insulating properties and tracking resistance, and thus it becomes easy to achieve both reduction in size and weight.
- each of the soluble conductor sheets 50a to 50f is a laminate containing a low-melting-point metal layer and a high-melting-point metal layer, the low-melting-point metal layer contains Sn, and the high-melting-point metal layer contains
- Ag or Cu is contained
- the high melting point metal is melted by Sn when the low melting point metal layer is melted, so the fusing temperature of the soluble conductor sheets 50a to 50f is lowered.
- Ag and Cu have higher physical strength than Sn, the physical strength of the soluble conductor sheets 50a to 50f in which the high melting point metal layer is laminated on the low melting point metal layer is higher than the physical strength of the low melting point metal layer alone. also higher.
- Ag and Cu have a lower electrical resistivity than Sn, and the electrical resistance of the soluble conductor sheets 50a to 50f in which the high-melting-point metal layer is laminated on the low-melting-point metal layer is lower than the electrical resistance of the low-melting-point metal layer alone. also lower.
- the fuse element can handle a larger current.
- each of the soluble conductor sheets 50a to 50f has two or more high melting point metal layers, one or more low melting point metal layers, and the low melting point metal layer is a high melting point metal layer. If the laminate is disposed between the refractory metal layers on the outside, the strength of the soluble conductor sheets 50a-50f increases. In particular, when connecting the first end portion 51 and the first terminal 91 and the second end portion 52 and the second terminal 92 of the fusible conductor sheets 50a to 50f by soldering, the fusible conductor sheet is heated during soldering. Deformation of 50a to 50f becomes difficult to occur.
- the soluble conductor sheets 50a to 50f when each of the soluble conductor sheets 50a to 50f is a single layer body containing silver or copper, compared with the case where it is a laminate of a high melting point metal layer and a low melting point metal layer , the electrical resistivity tends to be small. Therefore, the soluble conductor sheets 50a to 50f composed of a single layer containing silver or copper have the same area and the same electrical resistance as the soluble conductor sheets 50a to 50f composed of a laminate of a high melting point metal layer and a low melting point metal layer. Even if it has, the thickness can be reduced. When the soluble conductor sheets 50a to 50f are thin, the amount of melted and scattered material when the soluble conductor sheets 50a to 50f are fused decreases in proportion to the thickness, and the insulation resistance after breaking increases.
- each of the fusible conductor sheets 50a to 50f has a through hole 54 in the central portion 53, and the cross-sectional area of the first end portion 51 and the second end portion 52 in the direction of current flow Since the central portion 53 has a fused portion in which the cross-sectional area in the direction of current flow is reduced, the portion that fuses when a current exceeding the rating flows through the current path is stabilized.
- the central portion 53 is provided with the through hole 54 in the protective element 100 of the present embodiment, there is no particular limitation on the method for reducing the cross-sectional area of the central portion 53 .
- the cross-sectional area of the central portion 53 may be reduced by cutting both ends of the central portion 53 into concave shapes.
- the protective element of the present invention is not limited to the embodiments described above.
- the insulating case 10 has a cylindrical shape, but the shape of the insulating case 10 is not particularly limited.
- the insulating case 10 may be cubic.
- the fuse element laminate 40 has a configuration in which six soluble conductor sheets 50a to 50f are laminated, but the number of soluble conductor sheets is not particularly limited.
- the number of soluble conductor sheets should be two or more.
- the number of soluble conductor sheets may be, for example, within a range of 2 or more and 10 or less.
Landscapes
- Fuses (AREA)
Abstract
Description
本出願は、2021年9月7日に、日本に出願された特願2021-145576に基づき優先権を主張し、その内容をここに援用する。
[3]前記第1絶縁部材および前記第2絶縁部材は、前記可溶性導体シートの前記第1端部と前記第2端部との間の中央部で前記第1端部から前記第2端部に向かう方向を遮るように分離されている、[2]に記載の保護素子。
[4]前記絶縁ケースの内部に配置され、前記第2絶縁部材を前記可溶性導体シート側の方向に押圧する押圧部材を有する、[2]または[3]に記載の保護素子。
[6]前記第1絶縁部材、前記第2絶縁部材及び前記絶縁ケースのうち少なくとも一つは、ポリアミド系樹脂、フッ素系樹脂からなる群より選ばれる一種の樹脂材料で形成されている、[2]~[5]のいずれかに記載の保護素子。
[7]複数個の前記可溶性導体シートの各々は、低融点金属層と高融点金属層とを含む積層体であり、前記低融点金属層は錫を含み、前記高融点金属層は銀もしくは銅を含む、5、[1]~[6]のいずれかに記載の保護素子。
[8]複数個の前記可溶性導体シートの各々は、前記高融点金属層を2層以上有し、前記低融点金属層を1層以上有し、前記低融点金属層が前記高融点金属層の間に配置された積層体である、[7]に記載の保護素子。
[9]複数個の前記可溶性導体シートの各々は、銀もしくは銅を含む単層体である、[1]~[6]のいずれかに記載の保護素子。
図1~図6は、本発明の一実施形態に係る保護素子を示した模式図である。以下の説明で用いる図面において、Xで示す方向はヒューズエレメントの通電方向である。Yで示す方向はX方向と直交する方向であり、幅方向ともいう。Zで示す方向は、X方向およびY方向に直交する方向であり、厚さ方向ともいう。
絶縁ケース10は、略円柱状である。絶縁ケース10は、カバー20と保持部材30とからなる。
カバー20は、両端が開口した円筒形状である。カバー20の開口部における内側の縁部は、面取りされた傾斜面21とされている。カバー20の中央部は、保持部材30が収容される収容部22とされている。
ヒューズエレメント積層体40は、厚さ方向(Z方向)に並列配置された6個の可溶性導体シート50a、50b、50c、50d、50e、50fを有する。可溶性導体シート50a~50fの各々の間には、第1絶縁部材61a、61b、61c、61d、61eが配置されている。第1絶縁部材61a~61eは、可溶性導体シート50a~50fの各々に近接もしくは接触させた状態で配置されている。近接させた状態は、第1絶縁部材61a~61eと可溶性導体シート50a~50fとの距離が0.5mm以下の状態であることが好ましく、より好ましくは0.2mm以下の状態である。また、可溶性導体シート50a~50fのうちの最下部に配置された可溶性導体シート50aと第1保持部材30aとの間には、第2絶縁部材62aが可溶性導体シート50aに近接もしくは接触させた状態で配置されている。さらに、可溶性導体シート50a~50fのうちの最上部に配置された可溶性導体シート50fと第2保持部材30bとの間には、第2絶縁部材62bが可溶性導体シート50fに近接もしくは接触させた状態で配置されている。可溶性導体シート50a~50fの幅(Y方向の長さ)は、第1絶縁部材61a~61eおよび第2絶縁部材62a、62bの幅よりも狭くなっている。第1絶縁部材61a~61eと第2絶縁部材62a、62bが可溶性導体シート50a~50fの各々に近接もしくは接触させた状態で配置されていることにより、過電流に伴う可溶性導体シート50a~50fの溶断時にアーク放電が発生する空間自体を極めて狭くできる。アーク放電を構成するプラズマは空間内の気体が電離することよって発生するので、アーク放電が発生する空間自体を極めて狭くすることにより、プラズマの発生量が低減し、アーク放電の規模を小さく抑えることができる。
積層体の低融点金属層はSnを含む。低融点金属層は、Sn単体であってもよいし、Sn合金であってもよい。Sn合金は、Snを主成分とする合金である。Sn合金は、合金に含まれる金属の中でSnの含有量が最も多い合金である。Sn合金の例としては、Sn-Bi合金、In-Sn合金、Sn-Ag-Cu合金を挙げることができる。高融点金属層は、AgもしくはCuを含む。高融点金属層は、Ag単体であってもよいし、Cu単体であってもよいし、Ag合金であってもよいし、Cu合金であってもよい。Ag合金は合金に含まれる金属の中でAgの含有量が最も多い合金であり、Cu合金は、合金に含まれる金属の中でCuの含有量が最も多い合金である。積層体は、低融点金属層/高融点金属層の2層構造であってもよいし、高融点金属層を2層以上有し、低融点金属層が1層以上で、前記低融点金属層が高融点金属層の間に配置された3層以上の多層構造であってもよい。
第1絶縁部材61a~61eおよび第2絶縁部材62a、62bの材料としては、樹脂材料を用いることができる。樹脂材料の例は、カバー20および保持部材30の場合と同じである。
第1押圧部材71は、一方の端部が第1保持部材30aの押圧部材挿入孔39に挿入され、他方の端部が第2絶縁部材62aの第2絶縁片63bの隙間65側の端部に接している。第1押圧部材71は、第2絶縁片63bを上方(可溶性導体シート50a側)に押圧している。第1押圧部材71の押圧は、例えば、可溶性導体シート50a~50fを切断しない圧力で、可溶性導体シート50a~50fが溶断したときは、第1絶縁部材61a~61eおよび第2絶縁部材62a、62bの第2絶縁片63bを上方に押し上げることができる圧力である。
第1端子91は、一方の端部が可溶性導体シート50a~50fの第1端部51と接続し、他方の端部が絶縁ケース10の外部に露出している。また、第2端子92は、一方の端部が可溶性導体シート50a~50fの第2端部52と接続し、他方の端部が絶縁ケース10の外部に露出している。
図7において、ヒューズエレメント積層体40の可溶性導体シート50a~50fの中央部が溶断している。可溶性導体シート50a~50fの中央部が溶断することによって、第1押圧部材71の押圧によって、第1絶縁部材61a~61eおよび第2絶縁部材62a、62bの第2絶縁片63bが上方に押し上げられる。また、第2押圧部材72の押圧によって、第1絶縁部材61a~61eおよび第2絶縁部材62a、62bの第1絶縁片63aが下方に押し下げられる。これによって、積層する第1絶縁片間及び積層する第2絶縁片間が近接・接触し、通電経路の空間が物理的に遮蔽され、可溶性導体シート50a~50fの溶断によって発生したアーク放電を早期に消弧させることができる。
本実施形態の保護素子100は、次のようにして製造することができる。
先ず、第1保持部材30aとガイドピン41もしくは同等形状の治具にて位置決めされたヒューズエレメント積層体40と、第1端子91および第2端子92とを用意する。そして、ヒューズエレメント積層体40の可溶性導体シート50a~50fの各々の第1端部51と第1端子91とをハンダ付けによって接続する。また、第2端部52と第2端子92とをハンダ付けによって接続する。ハンダ付けに使用されるハンダ材料としては、公知のものを用いることができ、抵抗率と融点および環境対応鉛フリーの観点からSnを主成分とするものを用いることが好ましい。可溶性導体シート50a~50fの第1端部51と第1端子91との接続およびの可溶性導体シート50a~50fの第2端部52と第2端子92との接続は、ハンダ付けに限定されるものではなく、溶接による接合など公知の接合方法を用いてもよい。
以上の工程により、本実施形態の保護素子100が得られる。
例えば、上述した実施形態の保護素子100においては、絶縁ケース10は円筒形状であるが、絶縁ケース10の形状には特に制限はない。絶縁ケース10は立方体であってもよい。また、ヒューズエレメント積層体40は、6個の可溶性導体シート50a~50fが積層された構成とされているが、可溶性導体シートの個数には特に制限はない。可溶性導体シートの個数は2個以上であればよい。可溶性導体シートの個数は、例えば、2個以上10個以下の範囲内にあってもよい。
20 カバー
21 傾斜面
22 収容部
30 保持部材
30a 第1保持部材
30b 第2保持部材
31a 第1端部
31b 第2端部
32 端子載置面
33 端子接着剤注入口
34 ケース接着剤注入口
34a 切り欠き
35 凸部
36 凹部
37 ヒューズエレメント収容部
38 ガイドピン挿入孔
39 押圧部材挿入孔
40 ヒューズエレメント積層体
41 ガイドピン
50a、50b、50c、50d、50e、50f 可溶性導体シート
51 第1端部
52 第2端部
53 中央部
54 貫通孔
61a、61b、61c、61d、61e 第1絶縁部材
62a、62b 第2絶縁部材
63a 第1絶縁片
63b 第2絶縁片
64 ガイドピン貫通孔
65 隙間
71 第1押圧部材
72 第2押圧部材
80 内圧緩衝空間
91 第1端子
92 第2端子
91a、92a 外部端子孔
100 保護素子
Claims (10)
- ヒューズエレメント積層体と、前記ヒューズエレメント積層体を収容する絶縁ケースと、第1端子と、第2端子とを有し、
前記ヒューズエレメント積層体は、厚さ方向に並列配置された複数個の可溶性導体シートと、複数個の前記可溶性導体シートの各々の間に近接もしくは接触させた状態で配置された第1絶縁部材と、を含み、
複数個の前記可溶性導体シートの各々は、互いに対向する第1端部と第2端部を有し、前記第1端子は、一方の端部が前記第1端部と接続し他方の端部が前記絶縁ケースから外部に露出し、前記第2端子は、一方の端部が前記第2端部と接続し他方の端部が前記絶縁ケースから外部に露出している、保護素子。 - 複数個の前記可溶性導体シートのうちの最下部に配置された可溶性導体シートと前記絶縁ケースとの間、および複数個の前記可溶性導体シートのうちの最上部に配置された可溶性導体シートと前記絶縁ケースとの間の各々に第2絶縁部材が配置されている、請求項1に記載の保護素子。
- 前記第1絶縁部材および前記第2絶縁部材は、前記可溶性導体シートの前記第1端部と前記第2端部との間の中央部で前記第1端部から前記第2端部に向かう方向を遮るように分離されている、請求項2に記載の保護素子。
- 前記絶縁ケースの内部に配置され、前記第2絶縁部材を前記可溶性導体シート側の方向に押圧する押圧部材を有する、請求項2または請求項3に記載の保護素子。
- 前記第1絶縁部材、前記第2絶縁部材及び前記絶縁ケースのうち少なくとも一つは、耐トラッキング指標CTIが500V以上の材料で形成されている、請求項2または請求項3に記載の保護素子。
- 前記第1絶縁部材、前記第2絶縁部材及び前記絶縁ケースのうち少なくとも一つは、ポリアミド系樹脂、フッ素系樹脂からなる群より選ばれる一種の樹脂材料で形成されている、請求項2又は請求項3に記載の保護素子。
- 複数個の前記可溶性導体シートの各々は、低融点金属層と高融点金属層とを含む積層体であり、前記低融点金属層は錫を含み、前記高融点金属層は銀もしくは銅を含む、請求項1~3のいずれか1項に記載の保護素子。
- 複数個の前記可溶性導体シートの各々は、前記高融点金属層を2層以上有し、前記低融点金属層を1層以上有し、前記低融点金属層が前記高融点金属層の間に配置された積層体である、請求項7に記載の保護素子。
- 複数個の前記可溶性導体シートの各々は、銀もしくは銅を含む単層体である、請求項1~3のいずれか1項に記載の保護素子。
- 複数個の前記可溶性導体シートの各々は、前記第1端部と前記第2端部の間に溶断部を有し、前記第1端部および前記第2端部の前記第1端部から前記第2端部に向かう通電方向の断面積より、前記溶断部の前記通電方向の断面積の方が小さい、請求項1~3のいずれか1項に記載の保護素子。
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WO2020179728A1 (ja) * | 2019-03-05 | 2020-09-10 | デクセリアルズ株式会社 | 保護素子 |
WO2021014909A1 (ja) * | 2019-07-24 | 2021-01-28 | デクセリアルズ株式会社 | 保護素子 |
-
2021
- 2021-09-07 JP JP2021145576A patent/JP2023038709A/ja active Pending
-
2022
- 2022-08-26 KR KR1020247006456A patent/KR20240038782A/ko unknown
- 2022-08-26 WO PCT/JP2022/032145 patent/WO2023037899A1/ja active Application Filing
- 2022-08-26 CN CN202280058448.1A patent/CN117882167A/zh active Pending
- 2022-09-02 TW TW111133376A patent/TW202320108A/zh unknown
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JPS53110047A (en) * | 1977-03-07 | 1978-09-26 | Mitsubishi Electric Corp | Current limiting fuse |
JPS5445333U (ja) * | 1977-09-06 | 1979-03-29 | ||
JPS5473939U (ja) * | 1977-11-04 | 1979-05-25 | ||
JPH05274994A (ja) * | 1992-03-27 | 1993-10-22 | Tokyo Electric Power Co Inc:The | 電流ヒューズ |
JP2013505539A (ja) * | 2009-09-16 | 2013-02-14 | リッテルフューズ,インコーポレイティド | 金属薄膜表面実装ヒューズ |
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JP2016110742A (ja) * | 2014-12-03 | 2016-06-20 | デクセリアルズ株式会社 | 保護素子および電子機器 |
JP2017004634A (ja) * | 2015-06-05 | 2017-01-05 | 太平洋精工株式会社 | ヒューズエレメント、及び一体型ヒューズエレメント |
WO2018159283A1 (ja) * | 2017-02-28 | 2018-09-07 | デクセリアルズ株式会社 | ヒューズ素子 |
WO2020179728A1 (ja) * | 2019-03-05 | 2020-09-10 | デクセリアルズ株式会社 | 保護素子 |
WO2021014909A1 (ja) * | 2019-07-24 | 2021-01-28 | デクセリアルズ株式会社 | 保護素子 |
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JP2023038709A (ja) | 2023-03-17 |
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