WO2011158851A1 - 保護素子、及び、保護素子の製造方法 - Google Patents
保護素子、及び、保護素子の製造方法 Download PDFInfo
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- WO2011158851A1 WO2011158851A1 PCT/JP2011/063648 JP2011063648W WO2011158851A1 WO 2011158851 A1 WO2011158851 A1 WO 2011158851A1 JP 2011063648 W JP2011063648 W JP 2011063648W WO 2011158851 A1 WO2011158851 A1 WO 2011158851A1
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- conductive layer
- substrate
- electrode
- laminated
- metal body
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- 238000004519 manufacturing process Methods 0.000 title claims description 13
- 229910000679 solder Inorganic materials 0.000 claims abstract description 65
- 239000000758 substrate Substances 0.000 claims abstract description 57
- 229910052751 metal Inorganic materials 0.000 claims description 29
- 239000002184 metal Substances 0.000 claims description 29
- 238000002844 melting Methods 0.000 claims description 27
- 230000008018 melting Effects 0.000 claims description 23
- 230000003628 erosive effect Effects 0.000 claims description 22
- 230000001681 protective effect Effects 0.000 claims description 22
- 238000010030 laminating Methods 0.000 claims description 17
- 238000010438 heat treatment Methods 0.000 claims description 11
- 238000000034 method Methods 0.000 claims description 9
- 230000008569 process Effects 0.000 claims description 8
- 238000003475 lamination Methods 0.000 claims description 6
- 239000000155 melt Substances 0.000 claims description 6
- 229910052709 silver Inorganic materials 0.000 claims description 6
- 239000004332 silver Substances 0.000 claims description 3
- 230000007797 corrosion Effects 0.000 abstract 1
- 238000005260 corrosion Methods 0.000 abstract 1
- 239000000463 material Substances 0.000 description 11
- 238000001514 detection method Methods 0.000 description 10
- 230000004048 modification Effects 0.000 description 10
- 238000012986 modification Methods 0.000 description 10
- 238000010586 diagram Methods 0.000 description 8
- 230000009471 action Effects 0.000 description 6
- 239000004020 conductor Substances 0.000 description 5
- 230000005856 abnormality Effects 0.000 description 4
- 239000011521 glass Substances 0.000 description 4
- 229910007637 SnAg Inorganic materials 0.000 description 3
- 239000000919 ceramic Substances 0.000 description 3
- 239000007769 metal material Substances 0.000 description 3
- 229910052697 platinum Inorganic materials 0.000 description 3
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 2
- 230000004907 flux Effects 0.000 description 2
- 239000011888 foil Substances 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000005669 field effect Effects 0.000 description 1
- 239000002241 glass-ceramic Substances 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 229910001416 lithium ion Inorganic materials 0.000 description 1
- 230000001568 sexual effect Effects 0.000 description 1
- 238000009736 wetting Methods 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H37/00—Thermally-actuated switches
- H01H37/74—Switches in which only the opening movement or only the closing movement of a contact is effected by heating or cooling
- H01H37/76—Contact member actuated by melting of fusible material, actuated due to burning of combustible material or due to explosion of explosive material
- 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
- H01H61/00—Electrothermal relays
- H01H61/02—Electrothermal relays wherein the thermally-sensitive member is heated indirectly, e.g. resistively, inductively
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H69/00—Apparatus or processes for the manufacture of emergency protective devices
- H01H69/02—Manufacture of fuses
-
- 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
- H01H37/02—Details
- H01H37/04—Bases; Housings; Mountings
- H01H2037/046—Bases; Housings; Mountings being soldered on the printed circuit to be protected
-
- 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
- H01H2037/768—Contact member actuated by melting of fusible material, actuated due to burning of combustible material or due to explosion of explosive material characterised by the composition of the fusible 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
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49002—Electrical device making
- Y10T29/49107—Fuse making
Definitions
- the present invention relates to a protection element for protecting an electric circuit from an overcurrent state and an overvoltage state, and a method for manufacturing the protection element.
- Patent Document 1 describes the melting of a wiring pattern at the time of overcurrent using solder erosion such as solder erosion by forming solder on a part of wiring of a printed circuit board. ing.
- Japanese Patent Application Laid-Open No. H10-228561 describes that the pattern width of the fusing part is narrowed in order to shorten the fusing time and a slit is formed in the direction in which current flows.
- protection function described in Patent Document 1 described above is a fuse function for overcurrent protection to the last, for example, for voltage detection that detects a battery voltage abnormality as required by a secondary protection circuit for a battery. It is not possible to cope with a function that quickly and reliably cuts off the current path in response to an abnormal signal from the IC.
- the present invention has been proposed in view of such a situation, and the solder made of a low melting point metal body is energized in accordance with an abnormality such as an overvoltage, and the self generated by the heat generated by the resistor or the overcurrent. It is an object of the present invention to provide a protection element capable of quickly and surely interrupting a current path using a solder erosion phenomenon that is melted only by heat generation and melted solder, and a method of manufacturing the protection element.
- a protection circuit is connected to a substrate, a plurality of electrodes formed on the substrate, and a current path between the electrodes, and is blown by heating, thereby causing a current path.
- Each of the electrodes includes a first conductive layer laminated on the substrate, and a first conductive layer comprising: a low-melting-point metal body that cuts off the metal; and a resistor that generates heat that melts the low-melting-point metal body when energized.
- the low melting point metal body has a higher wettability with the electrode than the substrate, and is formed of a second conductive layer laminated at positions spaced apart from each other in the surface direction on the laminated substrate.
- the protection circuit manufacturing method includes a first laminating step of laminating a first conductive layer on a substrate provided with a resistor that generates heat that melts a low-melting point metal body when energized; A second laminating step of forming a plurality of electrodes by laminating a plurality of second conductive layers at positions spaced apart from each other on the substrate on which the first conductive layer is laminated by the laminating step of The low melting point metal body that has higher wettability with the electrode formed by the second lamination step than the substrate and is cut off by heating to cut off the current path between the electrodes, the heat generated by the resistor, and While being melted by at least one of the heat generated by the laminated portion composed of the electrode and the low-melting-point metal body, the first conductive layer laminated between the electrodes is eroded and drawn to the electrode side having higher wettability than the substrate. The first conductive layer and the second conductive layer so that they are blown out. And having a third lamination
- the low-melting point metal body is laminated on the first conductive layer between the electrodes, the erosion action by the first conductive layer is achieved except for the heat generated by the resistor and self-heating due to overcurrent. The current path can be prevented from fusing without causing it.
- the electrode since the electrode is formed by a laminated structure having a layer thickness difference with respect to the substrate, the low-melting point metal body erodes only the second conductive layer when melted, and the surface tension Thus, the electrode can be drawn closer to the electrode having higher wettability than the substrate.
- the present invention melts the solder made of a low melting point metal body only by heat generated by the resistor or self-heating due to overcurrent by energizing the solder in response to abnormality such as overvoltage, and the erosion phenomenon of the melted solder.
- the current path can be interrupted quickly and reliably.
- FIG. 1 is a diagram showing an overall configuration of a battery pack to which the present invention is applied.
- FIG. 2 is a diagram showing a circuit configuration of a protection circuit to which the present invention is applied.
- FIG. 3A is a diagram for explaining a manufacturing method of the protection element 100 to which the present invention is applied, and
- FIG. 3B is a diagram for explaining a manufacturing method of the protection element 100 to which the present invention is applied.
- FIG. 4 is a plan view of the stacked body of FIG. 3A as viewed from above.
- FIG. 5 is a plan view of the laminate of FIG. 3B as viewed from above.
- FIG. 6 is a cross-sectional view for explaining a state where the current path is blown by the solder 116 of the protection element.
- FIG. 1 is a diagram showing an overall configuration of a battery pack to which the present invention is applied.
- FIG. 2 is a diagram showing a circuit configuration of a protection circuit to which the present invention is applied.
- FIG. 7 is a plan view for explaining a state where the current path is melted by the solder 116 of the protection element.
- FIG. 8 is a diagram for explaining a laminated structure of protective elements according to a modification to which the present invention is applied.
- FIG. 9 is a diagram for explaining a laminated structure of protective elements according to a modification to which the present invention is applied.
- FIG. 10 is a plan view of the laminate of FIG. 8 as viewed from above.
- FIG. 11 is a plan view of the laminate of FIG. 9 as viewed from above.
- FIG. 12 is a cross-sectional view for explaining a state where the current path is melted by the solder 116 of the protection element according to the modification.
- FIG. 13 is a plan view for explaining a state where the current path is blown by the solder 116 of the protection element according to the modification.
- FIG. 14A is a diagram showing a cross-sectional structure of the test substrate
- FIG. 14B is a plan view of the test substrate as viewed from above.
- the protection element to which the present invention is applied is a protection element that protects an electric circuit from at least one of an overcurrent state and an overvoltage state.
- a total of four chargeable / dischargeable battery cells 11 as shown in FIG. Used in a battery pack 1 having a battery 10 consisting of ⁇ 14.
- the battery pack 1 includes a battery 10, a charge / discharge control circuit 20 that controls charge / discharge of the battery 10, a protection element 100 that protects the battery 10 and the charge / discharge control circuit 20, and each of the battery cells 11-14.
- a detection circuit 40 that detects a voltage and a current control element 50 that controls the operation of the protection element 100 according to the detection result of the detection circuit 40 are provided.
- the battery 10 includes battery cells 11 to 14 that need to be controlled so as not to be overcharged and overdischarged, such as a lithium ion battery, and is connected to the positive terminal of the battery pack 1.
- the charging device 2 is detachably connected to the charging device 2 through the negative electrode terminal 1b and the charging voltage from the charging device 2 is applied.
- the charge / discharge control circuit 20 includes two current control elements 21 and 22 connected in series to a current path flowing from the battery 10 to the charging device 2, and a control unit 23 that controls the operation of these current control elements 21 and 22.
- the current control elements 21 and 22 are constituted by, for example, field effect transistors (hereinafter referred to as FETs), and control conduction and interruption of the current path of the battery 10 by a gate voltage controlled by the control unit 23.
- the control unit 23 operates by receiving power supply from the charging device 2, and according to the detection result by the detection circuit 40, the current control element is configured to interrupt the current path when the battery 10 is overdischarged or overcharged.
- the operations of 21 and 22 are controlled.
- the protection element 100 is connected on a charge / discharge current path between the battery 10 and the charge / discharge control circuit 20, and its operation is controlled by the current control element 50.
- the detection circuit 40 is connected to each battery cell 11 to 14, detects the voltage value of each battery cell 11 to 14, and supplies each voltage value to the control unit 23 of the charge / discharge control circuit 20.
- the detection circuit 40 outputs a control signal for controlling the current control element 50 when any one of the battery cells 11 to 14 becomes an overcharge voltage or an overdischarge voltage.
- the protection element 100 is operated so that the charge / discharge current path of the battery 10 is cut off.
- the configuration of the protection element 100 will be specifically described below.
- Protective element 100 to which the present invention is applied has a circuit configuration as shown in FIG. 2 in order to protect the electric circuit in battery pack 1 described above from an overcurrent state and an overvoltage state.
- the protection element 100 includes fuses 101 and 102 made of a low melting point metal body that is melted by heating, and a resistor 103 that generates heat that melts the fuses 101 and 102 when energized.
- the fuses 101 and 102 are, for example, elements in which one low-melting point metal body is physically separated on the circuit configuration and connected in series via the connection point P1, and charge and discharge control with the battery 10 is performed. They are connected in series on the charge / discharge current path between the circuit 20 and the circuit 20.
- the fuse 101 is connected to the battery 10 via a connection point A1 that is not connected to the fuse 102
- the fuse 102 is connected to the charge / discharge control circuit 20 via a connection point A2 that is not connected to the fuse 101.
- the resistor 103 has one end connected to the fuses 101 and 102 via the connection point P1, and the other end connected to the current control element 50 via the connection point P2.
- the protection element 100 having the circuit configuration as described above generates heat that melts the fuses 101 and 102 when the resistor 103 is energized by the operation of the current control element 50, and the fuses 101 and 102 are blown, so that the battery pack Protect the electrical circuit in 1.
- the protection element 100 functions as the fuses 101 and 102 using solder made of a low melting point metal body, and uses the solder erosion phenomenon to quickly and reliably cut off the current path. It is manufactured by a manufacturing process as shown.
- the protective element 100 has a resistor 103 formed on a ceramic substrate 111a via a glass layer 111b, and a first conductive layer 112 stacked thereon via a glass layer 111c.
- the protective element to which the present invention is applied is not limited to the above-described laminated structure, and a laminated structure using an insulating member other than glass is used, or the resistor 103 is directly laminated on the surface of the ceramic substrate 111a.
- a structure in which the glass layer 111b is not formed may be used.
- the ceramic substrate 11a for example, an alumina substrate, a glass ceramic substrate, or the like is used.
- the first conductive layer 112 having a film thickness d1 is laminated on the substrate 111 by a printing process or the like with a good conductor such as Ag or Pt.
- a good conductor such as Ag or Pt is printed on the substrate 111 on which the first conductive layer 112 is formed, at a plurality of positions spaced apart from each other in the surface direction on the substrate 111.
- a plurality of electrodes 114a, 114b, and 114c are formed by stacking the second conductive layers 113 each having a film thickness d2 by treatment or the like.
- the electrode 114a is a portion corresponding to the connection point A1 in the circuit configuration shown in FIG. 2
- the electrode 114b is a portion corresponding to the connection point P1 in the circuit configuration shown in FIG.
- the electrode 114c is a portion corresponding to the connection point A2 in the circuit configuration shown in FIG.
- the electrodes 114a, 114b, and 114c will be collectively referred to as the electrode 114 below.
- a good conductor such as Ag or Pt is used for both the first conductive layer 112 and the second conductive layer 113, but in order to relatively enhance the erosion action of the first conductive layer 112 by solder as described later. It is preferable to adjust the material of the first conductive layer 112 with respect to the second conductive layer 113 so as to easily cause erosion by solder.
- a non-lead solder 116 such as SnAg is printed as a low melting point metal body on the substrate 111 on which the electrode 114 is formed, as shown in FIG. 3B.
- the first conductive layer 112 and the second conductive layer 113 are stacked in contact with each other.
- the solder 116 laminated so as to bridge between the electrodes 114a and 114b functions as the fuse 101
- the solder 116 laminated so as to bridge between the electrodes 114b and 114c functions as the fuse 102.
- the metal material to be laminated in the third lamination step is not limited as long as the electrode 114 has higher characteristics than the substrate 111 in terms of wettability when the metal material is melted. It is not limited to metal materials.
- the insulating film 117 is formed on each electrode 114 formed by the second laminating process before the third laminating process. It is preferable to perform a process. In this way, by forming the insulating film 117 on each electrode 114, in the manufacturing method of the protection element 100, the insulation shown in the plan view of FIG. 4 when the stacked body of FIG. The liquid solder 116 can be held at each of the arrangement positions 116a and 116b partitioned by the film 117 until it is solidified after the printing process. As a result, the solder 116 is laminated so as to have a uniform layer thickness. Can do.
- the electrode 114b is connected to an electrode 118a corresponding to the connection point P1.
- the resistor 103 disposed inside the substrate 111 is connected to the electrode 118a through the conductor 103a and is connected to the electrode 118b through the conductor 103b.
- the protective element 100 is further laminated with a flux 119 that activates fluidity when the solder 116 is melted, at a portion where the solder 116 is laminated, and further protects the entire protective element 100.
- a cap 120 is provided.
- the solder 116 includes heat generated by the resistor 103 and heat generated by the laminated portion 121 that corresponds to the portion illustrated in FIG. 5, for example, the electrode 114 and the solder 116. Start to melt by at least one. As shown in FIGS. 6 and 7, the protective element 100 has wettability from the substrate 111 due to surface tension while the melted solder 116 erodes the first conductive layer 112 stacked between the electrodes 114. Is attracted to the higher electrode 114 side.
- the protection element 100 has a molten residue 131 composed of the solder 116 and the first conductive layer 112, but the amount of the molten residue 131 is small.
- the first conductive layer 112 positioned between the electrodes 114 on which the second conductive layer 113 is not stacked functions as the fusing part 132, and the second conductive layer in which the electrode 114 is formed.
- Reference numeral 113 functions as a solder reservoir 133 that attracts the eroded solder.
- the protective element 100 uses the first conductive layer 112 and the second conductive layer 113 to form the electrode 114 with a stacked structure in which a layer thickness difference is provided with respect to the substrate 111.
- the solder 116 can be attracted to the electrode 114 side while only the first conductive layer 112 is eroded.
- the protection element 100 since the solder 116 is laminated on the first conductive layer 112 between the electrodes 114, for example, when the protection element 100 is reflow-mounted on the circuit board in the battery 1, for example. It is possible to prevent fusing by the generated heat. That is, in the protective element 100, the current path can be prevented from being interrupted without causing erosion by the first conductive layer 112 except for heat generated by the resistor 103 and self-heating due to overcurrent.
- the solder 116 made of a low melting point metal body is melted only by heat generated by the resistor 103 or self-heating due to overcurrent when energized according to abnormality such as overvoltage.
- the current path can be quickly and reliably interrupted.
- the third lamination process described above can be easily performed by a printing process while using a lead-free paste-like solder to expand the choice of solder materials. It is preferable in that it can be performed.
- the protection element to which the present invention is applied is not limited to the above lead-free paste form, and the solder material includes Pb or a paste material such as a solder foil instead of the paste form. Good.
- the protection element 100 is positioned between the electrodes 114 on the substrate 111 and is eroded by melting of the solder 116, as shown in FIGS.
- One or more slits 112a for separating the first conductive layer 112 from each other are preferably formed in one conductive layer 112 from the viewpoint of quickly and reliably blocking the current path.
- the protection element 100 forms slits 112a that separate the first conductive layers 112 between the electrodes 114 on the substrate 111, and further, as shown in FIG.
- the solder 116 is laminated so as to be in contact with both the first conductive layer 112 and the second conductive layer 113.
- the insulating film 117 is formed on each electrode 114, whereby the insulating film shown in the plan view of FIG. Solder 116 can be laminated at each of the arrangement positions 116 a and 116 b partitioned by 117 so as to have a uniform layer thickness.
- a flux 119 that activates fluidity when the solder 116 is melted is laminated on a portion where the solder 116 is laminated, and further, the protection element 100.
- a cap 120 is provided to protect the whole.
- the protection element 100 according to the modification manufactured as described above when the solder 116 is melted, the solder 116 enters the slit 112a, so that the first element is more efficiently performed. Since the conductive layer 112 is eroded, as shown in the plan view of FIG. 13, it is possible to prevent the molten residue 131 composed of the solder 116 and the first conductive layer 112 from being generated. That is, in the protection element 100 according to the modification, the leakage current between the electrodes 114 can be further reduced, and the current path can be quickly and reliably interrupted.
- the electrode 114 is formed by using a first conductive layer 112 and a second conductive layer 113 and a conductive layer having a layer thickness difference with respect to the substrate 111.
- the ratio of the film thickness of the electrode 114 to the film thickness of the first conductive layer 112 is 2 or more, and erosion characteristics by solder according to the layer thickness of the conductive layer obtained from the following test. To preferred.
- FIG. 14A is a diagram showing a cross-sectional structure of the test substrate 200
- FIG. 14B is a plan view of the test substrate 200 as viewed from above.
- the test substrate 200 is obtained by sequentially laminating a conductive layer 203 defined by a layer thickness d and a solder 204 on a substrate 202 in which a resistor 201 is provided.
- a silver-based thick film fired material was used as the material of the conductive layer 203.
- the area where the silver-based thick film fired material is heated by the resistor 201 is set to 2.5 [mm] ⁇ 0.8 [mm] as shown in FIG. 14B. Furthermore, the surface temperature of the conductive layer 203 is heated to about 650 ° C. by the resistor 201.
- lead-based solder 204 having a relatively high melting point compared to SnAg-based material was used, but lead-free solder such as SnAg-based solder has a relatively low melting point. This is preferable in that the erosion action by solder tends to occur.
- the conductive layer 203 having a layer thickness d of about 7 [ ⁇ m] has a large erosion action and functions as the fusing part 132.
- the conductive layer 203 having a layer thickness d of about 14 [ ⁇ m] is suitable for the electrode portion 114 that has less erosion and functions as the solder pool portion 133.
- the conductive layer 203 having a layer thickness d of about 22 [ ⁇ m] has no erosion action and is particularly suitable for the electrode portion 114.
- the ratio of the film thickness of the electrode 114 to the film thickness of the first conductive layer 112 is 2 or more, particularly 3 or more.
- the film thickness of the electrode 114 is the total film thickness of the first conductive layer 112 and the second conductive layer 113.
- the ratio of the film thickness of the electrode 114 to the film thickness of the first conductive layer 112 is in the range of 2 to 3, so that the electrode 114 can be eroded while reducing the material cost of the conductive layer. It is particularly preferable in that it does not occur.
- the thickness of the first conductive layer 112 is preferably 7 [ ⁇ m] or less from the viewpoint of efficiently exerting the erosion action, and is the lowest that is not eroded during reflow mounting.
- the film thickness is particularly preferably 1 [ ⁇ m] or more.
- the film thickness of the electrode 114 that is, the total film thickness of the first conductive layer 112 and the second conductive layer 113 is 14 [ ⁇ m] or more, particularly 22 [ ⁇ m] from the viewpoint of preventing erosion. It is preferable that it is above.
- the fusing part 132 in which the first conductive layer 112 is eroded preferably has an area of about 0.5 to 2 [mm] ⁇ 0.2 to 0.4 [mm] in length, and is further shown as a modification.
- the slit size is 0.5 to 2 [mm] in the width direction between the electrodes 114, and 0.1 to 0.2 [mm] in the length direction orthogonal to the width direction. ] Is preferable.
- the protective element to which the present invention is applied is intended to protect not only the battery pack 1 as described above but also at least one of an overcurrent state and an overvoltage state.
- the current path can be cut off quickly and reliably by utilizing the solder erosion phenomenon.
Abstract
Description
Claims (8)
- 基板と、
上記基板上に複数形成された電極と、
上記電極間の電流経路に接続され、加熱により溶断されることで該電流経路を遮断する低融点金属体と、
通電すると上記低融点金属体を溶融する熱を発する抵抗体とを備え、
上記各電極は、上記基板上に積層された第1の導電層と、該第1の導電層が積層された基板上の面方向に互いに離間した位置に積層された第2の導電層とから形成され、
上記低融点金属体は、上記電極との濡れ性が上記基板よりも高く、上記第1の導電層と上記第2の導電層とが積層された基板上に積層され、上記抵抗体が発する熱、及び、該電極と該低融点金属体とからなる積層部が発する熱の少なくとも一方により溶融することで、上記電極間に積層された第1の導電層を浸食しながら、該基板に比べて濡れ性が高い該電極側に引き寄せられて溶断されることを特徴とする保護素子。 - 上記第1の導電層の層厚に対する上記電極の層厚の比率は、2以上であることを特徴とする請求項1記載の保護素子。
- 上記基板上に形成された電極間に位置し、上記低融点金属体が溶融することで浸食される第1の導電層には、該第1の導電層を互いに離間するスリットが1以上形成されていることを特徴とする請求項1記載の保護素子。
- 上記低融点金属体は、非鉛系の半田であることを特徴とする請求項1記載の保護素子。
- 上記第1の導電層と上記第2の導電層とは、それぞれ銀を含むことを特徴とする請求項1記載の保護素子。
- 通電すると低融点金属体を溶融する熱を発する抵抗体が設けられた基板に第1の導電層を積層する第1の積層工程と、
上記第1の積層工程により第1の導電層が積層された上記基板上の面方向に互いに離間した位置に、複数の第2の導電層を積層することで、複数の電極を形成する第2の積層工程と、
上記第2の積層工程により形成された電極との濡れ性が上記基板よりも高く、加熱により溶断されることで該電極間の電流経路を遮断する低融点金属体を、上記抵抗体が発する熱、及び、該電極と該低融点金属体とからなる積層部が発する熱の少なくとも一方により溶融して、該電極間に積層された上記第1の導電層を浸食しながら、該基板に比べて濡れ性が高い該電極側に引き寄せられて溶断されるように、上記第1の導電層と上記第2の導電層とが積層された基板上に積層する第3の積層工程とを有することを特徴とする保護素子の製造方法。 - 上記第2の積層工程により形成された各電極上に絶縁膜を成膜する成膜工程を更に有し、
上記第3の積層工程は、上記低融点金属体を、上記各電極上に成膜された絶縁膜によって離隔された状態で、上記第1の導電層と上記第2の導電層とが積層された基板上に積層することを特徴とする請求項6記載の保護素子の製造方法。 - 上記第3の積層工程では、ペースト状の上記低融点金属体を印刷処理することによって、上記第1の導電層と上記第2の導電層とが積層された基板上に積層することを特徴とする請求項6又は7記載の保護素子の製造方法。
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EP11795755.5A EP2584579A4 (en) | 2010-06-15 | 2011-06-15 | PROTECTION ELEMENT AND METHOD FOR PRODUCING THE PROTECTIVE ELEMENT |
US13/704,774 US20130099890A1 (en) | 2010-06-15 | 2011-06-15 | Protection element and method for producing protection element |
CN201180029446.1A CN102934188B (zh) | 2010-06-15 | 2011-06-15 | 保护元件及保护元件的制造方法 |
KR1020137000897A KR101791292B1 (ko) | 2010-06-15 | 2011-06-15 | 보호 소자 및 보호 소자의 제조 방법 |
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US8976001B2 (en) * | 2010-11-08 | 2015-03-10 | Cyntec Co., Ltd. | Protective device |
JP6249600B2 (ja) | 2012-03-29 | 2017-12-20 | デクセリアルズ株式会社 | 保護素子 |
WO2013146889A1 (ja) * | 2012-03-29 | 2013-10-03 | デクセリアルズ株式会社 | 保護素子 |
JP6420053B2 (ja) * | 2013-03-28 | 2018-11-07 | デクセリアルズ株式会社 | ヒューズエレメント、及びヒューズ素子 |
JP6171500B2 (ja) * | 2013-04-03 | 2017-08-02 | 株式会社村田製作所 | ヒューズ |
JP6151550B2 (ja) | 2013-04-25 | 2017-06-21 | デクセリアルズ株式会社 | 保護素子 |
JP6227276B2 (ja) | 2013-05-02 | 2017-11-08 | デクセリアルズ株式会社 | 保護素子 |
JP6184238B2 (ja) | 2013-08-07 | 2017-08-23 | デクセリアルズ株式会社 | 短絡素子、及び短絡回路 |
CN103396769B (zh) * | 2013-08-21 | 2014-05-28 | 北京依米康科技发展有限公司 | 一种低熔点金属导热膏及其制备方法和应用 |
JP6324684B2 (ja) * | 2013-08-21 | 2018-05-16 | デクセリアルズ株式会社 | 保護素子 |
JP6184805B2 (ja) | 2013-08-28 | 2017-08-23 | デクセリアルズ株式会社 | 遮断素子、及び遮断素子回路 |
CN103426681B (zh) * | 2013-08-30 | 2016-06-22 | 蒋闯 | 可控可锁定保护开关、开关控制系统及锂电池 |
JP6196856B2 (ja) | 2013-09-11 | 2017-09-13 | デクセリアルズ株式会社 | 切替回路 |
JP6173859B2 (ja) | 2013-09-26 | 2017-08-02 | デクセリアルズ株式会社 | 短絡素子 |
JP6223142B2 (ja) | 2013-11-20 | 2017-11-01 | デクセリアルズ株式会社 | 短絡素子 |
JP6576618B2 (ja) * | 2014-05-28 | 2019-09-18 | デクセリアルズ株式会社 | 保護素子 |
JP6381975B2 (ja) | 2014-06-04 | 2018-08-29 | デクセリアルズ株式会社 | 短絡素子 |
JP6381980B2 (ja) * | 2014-06-11 | 2018-08-29 | デクセリアルズ株式会社 | スイッチ素子及びスイッチ回路 |
JP2016018683A (ja) * | 2014-07-08 | 2016-02-01 | デクセリアルズ株式会社 | 保護素子 |
JP2016035816A (ja) * | 2014-08-01 | 2016-03-17 | デクセリアルズ株式会社 | 保護素子及び保護回路 |
JP6411123B2 (ja) * | 2014-08-04 | 2018-10-24 | デクセリアルズ株式会社 | 温度短絡素子、温度切替素子 |
JP6343201B2 (ja) | 2014-08-04 | 2018-06-13 | デクセリアルズ株式会社 | 短絡素子 |
JP6437262B2 (ja) * | 2014-09-26 | 2018-12-12 | デクセリアルズ株式会社 | 実装体の製造方法、温度ヒューズ素子の実装方法及び温度ヒューズ素子 |
JP6622960B2 (ja) * | 2014-12-18 | 2019-12-18 | デクセリアルズ株式会社 | スイッチ素子 |
DE102015202071B4 (de) * | 2015-02-05 | 2018-11-15 | Continental Automotive Gmbh | Leiterplattenanordnung |
US9870886B2 (en) | 2016-02-17 | 2018-01-16 | Dexerials Corporation | Protective element and protective circuit substrate using the same |
US10032583B2 (en) | 2016-02-17 | 2018-07-24 | Dexerials Corporation | Protective circuit substrate |
US10283296B2 (en) * | 2016-10-05 | 2019-05-07 | Chin-Chi Yang | Controllable circuit protector for power supplies with different voltages |
TWI731801B (zh) | 2020-10-12 | 2021-06-21 | 功得電子工業股份有限公司 | 保護元件及其製作方法 |
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CN102934188A (zh) | 2013-02-13 |
KR101791292B1 (ko) | 2017-11-20 |
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TW201212087A (en) | 2012-03-16 |
EP2584579A1 (en) | 2013-04-24 |
JP5656466B2 (ja) | 2015-01-21 |
US20130099890A1 (en) | 2013-04-25 |
KR20130085408A (ko) | 2013-07-29 |
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