WO2016117578A1 - Élément fusible et module de circuit - Google Patents

Élément fusible et module de circuit Download PDF

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Publication number
WO2016117578A1
WO2016117578A1 PCT/JP2016/051482 JP2016051482W WO2016117578A1 WO 2016117578 A1 WO2016117578 A1 WO 2016117578A1 JP 2016051482 W JP2016051482 W JP 2016051482W WO 2016117578 A1 WO2016117578 A1 WO 2016117578A1
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WO
WIPO (PCT)
Prior art keywords
fuse element
insulating substrate
opening
case
top surface
Prior art date
Application number
PCT/JP2016/051482
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English (en)
Japanese (ja)
Inventor
裕治 古内
幸市 向
Original Assignee
デクセリアルズ株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by デクセリアルズ株式会社 filed Critical デクセリアルズ株式会社
Publication of WO2016117578A1 publication Critical patent/WO2016117578A1/fr

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    • 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
    • H01H85/165—Casings
    • H01H85/175—Casings characterised by the casing shape or form

Definitions

  • the present invention relates to a fuse element that protects a circuit by cutting off a power supply line and a signal line, and a circuit module on which the fuse element is mounted.
  • a fusible conductor is connected between a first electrode, a heating element extraction electrode, and a second electrode formed on an insulating substrate, thereby providing a current path.
  • the circuit side intends to make the fusible conductor on this current path blown by self-heating due to overcurrent, or by energizing a heating element provided inside the fuse element by an external signal.
  • the melted liquid soluble conductor is collected on the conductor layer connected to the heating element, whereby the first and second electrodes are separated to interrupt the current path.
  • Such a fuse element is generally covered with a case adhered to the surface of the insulating substrate while a soluble conductor is mounted on the insulating substrate on which the first and second electrodes and the heating element extraction electrode are formed. As a result, the inside is protected and the handleability is improved.
  • the present invention has a fuse element that has an opening for releasing the pressure inside the element, has an adhesive strength with an insulating substrate, prevents the case from falling off, and can ensure insulation after interruption of the current path, and
  • An object is to provide a circuit module using the same.
  • a fuse element includes an insulating substrate, a plurality of electrodes formed on a surface of the insulating substrate, and the plurality of electrodes connected between the plurality of electrodes and fused.
  • the case is provided with an opening penetrating inside the case at a position excluding a lower portion in contact with the surface of the insulating substrate.
  • the circuit module according to the present invention includes a fuse element and a circuit board on which the fuse element is surface-mounted, and the fuse element includes an insulating substrate and a plurality of electrodes formed on the surface of the insulating substrate.
  • a soluble conductor that is connected between the plurality of electrodes and is cut off between the plurality of electrodes by fusing, a side surface that is connected on the surface of the insulating substrate provided with the soluble conductor, and And a case having a top surface covering the surface of the insulating substrate, wherein the case is provided with an opening penetrating inside the case at a position excluding a lower portion in contact with the surface of the insulating substrate.
  • the expansion gas generated at the time of melting the soluble conductor is discharged, and the case Peeling and damage from the insulating substrate can be prevented.
  • the present invention it is possible to efficiently exhaust the vaporized material when the fuse element is blown by overcurrent toward the upper side of the insulating substrate, and the vaporized material is formed on the surface of the insulating substrate. It is also possible to prevent a situation in which the insulating property is impaired due to adhesion between the second electrodes.
  • FIG. 1A is a plan view showing a fuse element to which the present invention is applied without a case
  • FIG. 1B is a cross-sectional view of a circuit module to which the present invention is applied.
  • FIG. 2 is an external perspective view showing the back surface of the fuse element to which the present invention is applied.
  • FIG. 3 is an external perspective view showing a fuse element having an opening on the top surface of the case.
  • FIG. 4 is a plan view showing a fuse element having an opening on the center line in the width direction and the longitudinal direction of the insulating substrate on the top surface.
  • FIG. 5 is an external perspective view showing a fuse element provided with an opening extending over the top and side surfaces of the case.
  • FIG. 6 is a plan view showing a fuse element having openings at corners of the top surface.
  • FIG. 7 is an external perspective view showing a fuse element provided with openings extending over the top corner and side corners of the case.
  • FIG. 8 is a plan view showing a fuse element in which an opening is provided on the top surface above the melted portion of the fusible conductor.
  • FIG. 9 is a plan view showing a state where the fusible conductor is blown into a linear shape.
  • FIG. 10 is a plan view showing a fuse element in which an opening is provided above the end portion of the linear fused portion of the soluble conductor on the top surface.
  • FIG. 11 is a plan view showing a fuse element in which an opening is provided in a side edge portion of the top surface on an extension line of a linear fusing portion of a fusible conductor.
  • FIG. 12 is an external perspective view showing a fuse element provided with an opening on the center line in the width direction and the longitudinal direction of the insulating substrate on the side surface.
  • FIG. 13 is an external perspective view showing a fuse element in which an opening is provided at a corner of a side surface.
  • FIG. 14 is a diagram illustrating a corridor configuration of a battery pack to which a fuse element and a circuit module are applied.
  • FIG. 15 is a diagram illustrating a circuit configuration of the fuse element.
  • FIG. 16 is an external perspective view showing a fuse element according to a reference example.
  • the circuit module 3 to which the present invention is applied is one in which a fuse element 1 is surface-mounted on a circuit board 2.
  • a protection circuit for a lithium ion secondary battery is formed on the circuit board 2, and the fuse element 1 is surface-mounted, whereby the soluble conductor 13 is incorporated on the charge / discharge path of the lithium ion secondary battery.
  • the circuit module 3 blocks the current path by fusing the fusible conductor 13 by self-heating (Joule heat).
  • the circuit module 3 cuts off the current path by energizing the heating element 14 at a predetermined timing by a current control element provided on the circuit board 2 or the like, and fusing the soluble conductor 13 by the heat generation of the heating element 14.
  • FIG. 1A is a plan view showing the fuse element 1 to which the present invention is applied without a case
  • FIG. 1B is a cross-sectional view of a circuit module 3 to which the present invention is applied. It is.
  • the fuse element 1 includes an insulating substrate 10, a heating element 14 stacked on the insulating substrate 10 and covered with an insulating member 15, and first elements formed at both ends of the insulating substrate 10.
  • the electrode 11 and the second electrode 12, the heating element extraction electrode 16 laminated on the insulating member 15 so as to overlap the heating element 14, and both ends thereof are connected to the first and second electrodes 11 and 12, respectively.
  • a soluble conductor 13 whose central portion is connected to the heating element extraction electrode 16.
  • the insulating substrate 10 is formed in a substantially square shape by an insulating member such as alumina, glass ceramics, mullite, zirconia.
  • the insulating substrate 10 may be made of a material used for a printed wiring board such as a glass epoxy board or a phenol board, but it is necessary to pay attention to the temperature at which the fusible conductor 13 is melted.
  • the first and second electrodes 11 and 12 are opened by being spaced apart from each other in the vicinity of opposite side edges on the surface 10a of the insulating substrate 10, and a soluble conductor 13 to be described later is mounted. Thus, they are electrically connected via the soluble conductor 13. Further, the first and second electrodes 11 and 12 generate a large current exceeding the rating through the fuse element 1 and the fusible conductor 13 is melted by self-heating (Joule heat), or the heating element 14 generates heat when energized. The fusible conductor 13 is cut off by fusing.
  • the first and second electrodes 11 and 12 are provided on the back surface 10f through castellations provided on the first and second side surfaces 10b and 10c of the insulating substrate 10, respectively.
  • the external connection electrodes 11a and 12a are connected.
  • the fuse element 1 is connected to the circuit board 2 on which an external circuit is formed via these external connection electrodes 11a and 12a, and constitutes a part of the energization path of the external circuit.
  • the first and second electrodes 11 and 12 can be formed using a general electrode material such as Cu or Ag.
  • a coating such as Ni / Au plating, Ni / Pd plating, or Ni / Pd / Au plating is coated on the surfaces of the first and second electrodes 11 and 12 by a known method such as plating.
  • the fuse element 1 can prevent the first and second electrodes 11 and 12 from being oxidized, and can prevent a change in rating due to an increase in conduction resistance.
  • the first and second electrodes 11 and 12 are obtained by melting the connecting solder for connecting the fusible conductor 13 or the low melting point metal forming the outer layer of the fusible conductor 13. Can be prevented from being eroded.
  • the heating element 14 is a conductive member that generates heat when energized, and is made of, for example, W, Mo, Ru, Cu, Ag, or an alloy containing these as main components.
  • the heating element 14 is obtained by mixing a powdered material of these alloys, compositions, or compounds with a resin binder or the like, forming a paste on the insulating substrate 10 using a screen printing technique, and firing it. Etc. can be formed.
  • the heating element 14 has one end connected to the first heating element electrode 18 and the other end connected to the second heating element electrode 19.
  • an insulating member 15 is disposed so as to cover the heating element 14, and a heating element extraction electrode 16 is formed so as to face the heating element 14 through the insulating member 15.
  • an insulating member 15 may be laminated between the heating element 14 and the insulating substrate 10.
  • the insulating member 15 for example, glass can be used.
  • One end of the heating element extraction electrode 16 is connected to the first heating element electrode 18 and is connected to one end of the heating element 14 via the first heating element electrode 18.
  • the first heating element electrode 18 is formed on the third side surface 10 d side of the insulating substrate 10
  • the second heating element electrode 19 is formed on the fourth side surface 10 e side of the insulating substrate 10.
  • the second heating element electrode 19 is connected to an external connection electrode 19a formed on the back surface 10f of the insulating substrate 10 through a castellation formed on the fourth side surface 10e.
  • the heating element 14 is connected to an external circuit formed on the circuit board 2 via the external connection electrode 19a by mounting the fuse element 1 on the circuit board 2.
  • the heating element 14 can be connected to the first and second electrodes 11 and 12 by being energized through the external connection electrode 19a at a predetermined timing to cut off the energization path of the external circuit and generating heat.
  • the molten conductor 13 can be blown.
  • the heat generating body 14 also cut
  • the fusible conductor 13 is made of a material that is quickly melted by the heat generated by the heating element 14, and for example, a low melting point metal such as solder or Pb-free solder whose main component is Sn can be suitably used.
  • the fusible conductor 13 may be made of a high melting point metal such as In, Pb, Ag, Cu, or an alloy mainly containing any of these, or a laminate of a low melting point metal and a high melting point metal. It may be a body.
  • a high melting point metal such as In, Pb, Ag, Cu, or an alloy mainly containing any of these, or a laminate of a low melting point metal and a high melting point metal. It may be a body.
  • the high melting point metal and the low melting point metal even when the reflow temperature exceeds the melting point of the low melting point metal when the fuse element 1 is reflow mounted, Outflow to the outside can be suppressed and the shape of the soluble conductor 13 can be maintained.
  • the low melting point metal melts, and the high melting point metal is eroded (soldered), so that the fusing can be quickly performed at a temperature lower than the melting point of the high melting point metal.
  • the soluble conductor 13 is connected to the heating element extraction electrode 16 and the first and second electrodes 11 and 12 by soldering or the like.
  • the fusible conductor 13 can be easily connected by reflow soldering.
  • the soluble conductor 13 is preferably coated with a flux 18 for the purpose of preventing oxidation and improving wettability.
  • the fuse element 1 is provided with a case 20 on the surface 10a of the insulating substrate 10 in order to protect the inside.
  • the case 20 is formed in a substantially rectangular shape according to the shape of the insulating substrate 10.
  • the case 20 includes a side surface 21 connected to the surface 10a of the insulating substrate 10 provided with the soluble conductor 13, and a top surface that covers the surface 10a of the insulating substrate 10. 22, the fusible conductor 13 expands spherically on the surface 10 a of the insulating substrate 10 when melted, and the molten conductor aggregates on the heating element extraction electrode 16 and the first and second electrodes 11, 12. Enough internal space.
  • the case 20 is provided with an opening 23 penetrating into the case 20 at a position excluding the lower portion of the side surface 21 in contact with the surface 10a of the insulating substrate 10.
  • the fuse element 1 can discharge the expanding gas generated when the fusible conductor 13 is melted, and can prevent the case from being peeled off or damaged.
  • the fuse element 1 is provided with an opening 23 that does not reach the adhesive surface with the surface 10a of the insulating substrate 10 at a position other than the lower portion of the side surface 21, so that the side surface 21 adhered to the surface 10a of the insulating substrate 10 is provided. No depression is formed on the lower surface, and the bonding area can be ensured to the maximum. Therefore, the fuse element 1 can prevent a decrease in the adhesive strength due to a decrease in the bonding area of the case 20 to the insulating substrate 10, and the case 20 is peeled off from the surface 10 a of the insulating substrate 10 even when miniaturization progresses. I don't have to.
  • the fuse element 1 can efficiently exhaust the vaporized material when the fuse element is blown by an overcurrent toward the upper side of the insulating substrate 10 by providing the opening 23 at a position excluding the lower portion of the side surface 21. it can. Therefore, the fuse element 1 can also prevent a situation in which the vaporized substance adheres between the first and second electrodes 11 and 12 formed on the surface 10a of the insulating substrate 10 and inhibits insulation.
  • the shape of the opening 23 may be any shape such as a circle or a rectangle.
  • the size of the opening can be arbitrarily set, and when the circular opening 23 is formed, for example, the diameter can be 0.05 mm or more.
  • the opening 23 is a square, for example, one side can be a size of 0.05 mm or more, and when the opening 23 is a rectangle, a short side can be a size of 0.05 mm or more, for example. .
  • the case 20 is provided with one or more openings 23 on the top surface 22, and the center line L 1 in the width direction of the insulating substrate 10 and / or the longitudinal direction. it is preferably provided on the center line L 2 of.
  • the fusible conductor 13 is disposed at a substantially central portion of the insulating substrate 10, so that the vaporized substance or the case 20 can be used when self-heating due to overcurrent or fusing due to heat generation of the heating element 14.
  • the opening 23 is formed on the center line L 1 L 2 in the width direction and / or the longitudinal direction of the insulating substrate 10 on the top surface 22, so that the vaporized substance or the expanded air is formed. It becomes easy to miss.
  • the opening 23 is preferably formed in the side edge 22 a of the top surface 22. Since the fusible conductor 13 is disposed at a substantially central portion of the insulating substrate, the opening 23 is formed in the side edge 22a of the top surface 22 so that the path of the blast of the vaporized substance or the expanded air can be improved. Opened and can be exhausted efficiently. Further, the side edge portion 22a of the top surface 22 constitutes a corner portion by adjoining the upper side of the side surface 21 of the case 20, and is also a portion where vaporized substances and blasts of expanded air tend to concentrate. By providing 23, it is possible to make the blast easier to escape.
  • the handling of the fuse element 1 in the mounting machine is handled as compared with the case where the opening 23 is formed in the center of the top surface 22. There is no problem with sex.
  • At least one opening 23 is provided on the center line L 1 L 2 in the width direction and / or the longitudinal direction of the insulating substrate 10 on the top surface 22, and is preferably provided evenly on the top surface 22.
  • the openings 23 are preferably provided evenly at the four side edge portions 22 a on the center line L 1 in the width direction and the center line L 2 in the longitudinal direction of the insulating substrate 10 on the top surface 22.
  • the opening 23 may be provided equally in two places opposite side edge portions 22a on the center line L 2 of the center line L 1 or on longitudinal width direction of the insulating substrate 10 of the top surface 22.
  • the opening 23 may be formed from the side edge portion 22a of the top surface 22 to the upper portion of the side surface 21 as shown in FIG.
  • the blast is efficiently exhausted from the corner portion where the side edge portion 22a of the top surface 22 and the upper side of the side surface 21 are adjacent to each other, where vaporized substances and blasts of expanded air tend to concentrate. be able to.
  • the case 20 may be provided with an opening 23 at a corner 22b of the top surface 22 as shown in FIG.
  • the openings 23 are preferably provided at one or more corners 22b of the top surface 22 and provided at all four corners. Since the corner portion 22b of the top surface 22 tends to concentrate the vaporized substance and the blast of the expanded air, providing the opening 23 in the corner portion 22b makes it easier to escape the blast.
  • a blast can be efficiently exhausted from the corner
  • case 20 has the opening 23 formed in the side edge 22a on the center line L 1 L 2 in the width direction and / or the longitudinal direction of the insulating substrate 10 of the top surface 22 and also in the corner 22b. May be.
  • the case 20 has an opening 23 formed on the fusible conductor 13 as shown in FIG. You may form above the fusing part 13a.
  • the blast of the vaporized substance and the expanded air can be efficiently exhausted.
  • the fuse element 1 can be handled by a mounting machine as compared with the case where the opening 23 is provided at the center of the top surface 22. There is no problem in handling.
  • the case 20 is formed on the soluble conductor 13 on the top surface 22 as shown in FIG. You may form above the edge part of the linear fusing part 13b.
  • the fusible conductor 13 has an end portion of the linear fusing portion 13b on the top surface 22 because the end portion of the fusing portion 13b tends to be a final fusing portion when the fusing portion is linearly long.
  • the upper end of the linear fusing part 13b of the top surface 22 is out of the center of the top surface 22, so that the fuse element 1 of the fuse element 1 is compared with the case where the opening 23 is provided in the center of the top surface 22. There is no problem in handling such as handling on the mounting machine.
  • the case 20 is above the extension line of the linear melted part 13b formed by the fusible conductor 13 being melted in a linear shape, and is on the side edge 22a of the top surface 22. You may form in. Also in this case, when the fusible conductor 13 is blown by self-heating cutoff or the like, the final fusing point is likely to be the end of the linear fusing part 13b, and therefore above the extension line of the linear fusing part 13b, By forming the opening 23 in the side edge 22a of the top surface 22, it is possible to efficiently exhaust the vaporized material at the time of fusing and the blast of the expanded air.
  • the opening 23 may be formed from the side edge 22 a of the top surface 22 to the top of the side surface 21.
  • the blast is efficiently exhausted from the corner portion where the side edge portion 22a of the top surface 22 and the upper side of the side surface 21 are adjacent to each other, where vaporized substances and blasts of expanded air tend to concentrate. be able to.
  • the case 20 may be provided with one or a plurality of openings 23 on the side surface 21.
  • the opening 23 formed in the side surface 21 is also provided at a position excluding the lower portion of the side surface 21 in contact with the surface 10a of the insulating substrate 10.
  • the opening 23 formed in the side surface 21 is provided on the center line L 1 in the width direction and / or the center line L 2 in the longitudinal direction of the insulating substrate 10. Is preferred.
  • the fusible conductor 13 is disposed at a substantially central portion of the insulating substrate, when the vaporized substance or the air inside the case 20 rapidly expands at the time of fusing, the insulating substrate 10 on the side surface 21 is expanded.
  • the opening 23 By forming the opening 23 on the center line L 1 in the width direction and / or on the center line L 2 in the longitudinal direction, the vaporized substance and the expanded air can be easily released.
  • At least one opening 23 is provided on the center line L 1 L 2 in the width direction and / or the longitudinal direction of the insulating substrate 10 on the side surface 21, and is preferably provided evenly on the plurality of side surfaces 21.
  • the openings 23 are preferably provided evenly on the four side surfaces 21 on the center line L 1 in the width direction and the center line L 2 in the longitudinal direction of the insulating substrate 10.
  • the openings 23 may be equally provided on the two opposite side surfaces 21 on the center line L 1 in the width direction or the center line L 2 in the longitudinal direction of the insulating substrate 10.
  • the opening 23 formed in the side surface 21 may be formed in a corner portion 21a on the top surface 22 side of the side surface 21, as shown in FIG. Since the corner portion 21a of the side surface 21 tends to concentrate the vaporized substance and the blast of the expanded air, the blast can be more easily released by providing the opening portion 23 in the corner portion 21a.
  • the opening part 23 may be formed over the corner
  • the opening 23 may be formed from the corner 22b of the top surface 22 to the corner 21a on the top surface 22 side of one or two side surfaces 21 adjacent to the corner 22b.
  • the fuse element 1 described above a configuration in which the heating element 14 is provided and the soluble conductor 13 is blown by the heat generation of the heating element 14 in addition to the self-heating cutoff of the soluble conductor 13 due to a large current exceeding the rating has been described.
  • the fuse element 1 to which the present invention is applied may be one in which the current path is interrupted by the self-heating cutoff of the fusible conductor 13 due to a large current exceeding the rating without including the heating element 14.
  • circuit board 2 On which the fuse element 1 is mounted will be described.
  • a known insulating substrate such as a rigid substrate such as a glass epoxy substrate, a glass substrate, or a ceramic substrate, or a flexible substrate is used.
  • the circuit board 2 has a mounting portion on which the fuse element 1 is surface-mounted by reflow or the like, and is provided on the back surface 10a of the insulating substrate 10 of the fuse element 1 in the mounting portion. Connection electrodes connected to the external connection terminals 11a, 12a, and 19a are provided.
  • the circuit board 2 is mounted with an element such as an FET for energizing the heating element 14 of the fuse element 1.
  • circuit module 3 is used, for example, as a circuit in a battery pack of a lithium ion secondary battery.
  • the fuse element 1 is used by being incorporated in a battery pack 40 having a battery stack 45 including battery cells 41 to 44 of a total of four lithium ion secondary batteries.
  • the battery pack 40 includes a battery stack 45, a charge / discharge control circuit 50 that controls charging / discharging of the battery stack 45, a fuse element 1 to which the present invention that cuts off charging when the battery stack 45 is abnormal, and each battery cell A detection circuit 46 for detecting the voltages 41 to 44 and a current control element 47 for controlling the operation of the fuse element 1 according to the detection result of the detection circuit 46 are provided.
  • the battery stack 45 is formed by connecting battery cells 41 to 44 that need to be controlled for protection from overcharge and overdischarge states, and is detachable through the positive terminal 40a and the negative terminal 40b of the battery pack 40. Are connected to the charging device 55, and the charging voltage from the charging device 55 is applied.
  • the electronic device can be operated by connecting the positive terminal 40a and the negative terminal 40b of the battery pack 40 charged by the charging device 55 to the electronic device operated by the battery.
  • the charge / discharge control circuit 50 includes two current control elements 51 and 52 connected in series to a current path flowing from the battery stack 45 to the charging device 55, and a control unit 53 that controls operations of these current control elements 51 and 52. Is provided.
  • the current control elements 51 and 52 are configured by, for example, field effect transistors (hereinafter referred to as FETs), and control the gate voltage by the control unit 53 to control conduction and interruption of the current path of the battery stack 45. .
  • FETs field effect transistors
  • the control unit 53 operates by receiving power supply from the charging device 55, and controls the current so that the current path is interrupted when the battery stack 45 is overdischarged or overcharged according to the detection result by the detection circuit 46. The operation of the elements 51 and 52 is controlled.
  • the fuse element 1 is connected to, for example, a charge / discharge current path between the battery stack 45 and the charge / discharge control circuit 50, and its operation is controlled by the current control element 47.
  • the detection circuit 46 is connected to the battery cells 41 to 44, detects the voltage values of the battery cells 41 to 44, and supplies the voltage values to the control unit 53 of the charge / discharge control circuit 50.
  • the detection circuit 46 outputs a control signal for controlling the current control element 47 when any one of the battery cells 41 to 44 becomes an overcharge voltage or an overdischarge voltage.
  • the current control element 47 is constituted by, for example, an FET, and when the voltage value of the battery cells 41 to 44 exceeds a predetermined overdischarge or overcharge state by the detection signal output from the detection circuit 46, the fuse element 1 is operated to control the charge / discharge current path of the battery stack 45 to be cut off regardless of the switch operation of the current control elements 51 and 52.
  • the fuse element 1 to which the present invention is applied has a circuit configuration as shown in FIG. That is, the fuse element 1 generates heat that melts the soluble conductor 13 by energizing the soluble conductor 13 connected in series via the heating element extraction electrode 16 and the connection point of the soluble conductor 13 to generate heat.
  • This is a circuit configuration comprising the body 14.
  • the fusible conductor 13 is connected in series on the charge / discharge current path, and the heating element 14 is connected to the current control element 47.
  • the first electrode 11 of the fuse element 1 is connected to the open end of the battery stack 45 via the external connection electrode 11a, and the second electrode 12 is connected to the positive terminal 40a side of the battery pack 40 via the external connection electrode 12a.
  • the heating element 14 is connected to the charge / discharge current path of the battery pack 40 by being connected to the soluble conductor 15 via the heating element extraction electrode 13, and via the heating element electrode 16 and the external connection electrode 19 a. It is connected to the current control element 47.
  • the battery pack 40 cuts off the current path by fusing the fusible conductor 13 by self-heating (Joule heat). can do.
  • the fuse element 1 is provided with an opening 23 penetrating the inside of the case 20 at a position excluding the lower portion of the side surface 21 in contact with the surface 10a of the insulating substrate 10 of the case 20, the fusible conductor 13 is fused. It is possible to discharge the vaporized substance of the fusible conductor 13 and the air inside the expanded case 20 that are sometimes generated, and to prevent the case from being peeled off or damaged from the insulating substrate 10.
  • the fuse element 1 is provided with the opening 23 at a position excluding the lower portion of the side surface 21, so that no depression is formed on the lower surface of the side surface 21 bonded to the surface 10a of the insulating substrate 10, and the bonding area is maximized. Can be secured to the limit. Therefore, the fuse element 1 can prevent a decrease in the adhesive strength due to a decrease in the bonding area of the case 20 to the insulating substrate 10, and the case 20 is peeled off from the surface 10 a of the insulating substrate 10 even when miniaturization progresses. There is no need to do.
  • the fuse element 1 can efficiently exhaust the vaporized material when the fuse element is blown by an overcurrent toward the upper side of the insulating substrate 10 by providing the opening 23 at a position excluding the lower portion of the side surface 21. it can. Therefore, the fuse element 1 can also prevent a situation in which the vaporized substance adheres between the first and second electrodes 11 and 12 formed on the surface 10a of the insulating substrate 10 and inhibits insulation.
  • the fuse element 1 to which the present invention is applied is not limited to use in a battery pack of a lithium ion secondary battery, and can of course be applied to various uses that require interruption of a current path by an electric signal.

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  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Fuses (AREA)

Abstract

L'invention concerne un élément fusible qui est pourvu d'une ouverture pour libérer la pression interne et qui maintient à la fois la force d'adhérence avec un substrat isolant et la propriété d'isolation après le blocage d'un chemin de courant électrique. L'élément fusible comprend : un substrat isolant (10) ; une pluralité d'électrodes (11, 12) formées sur une surface (10a) du substrat isolant (10) ; un conducteur soluble (13) qui est relié à la zone entre les électrodes (11, 12) et qui, en éclatant, bloque la zone entre les électrodes (11, 12) ; et un boîtier (20) qui comporte une surface latérale (21) qui est collée sur la surface (10a) du substrat isolant (10) sur laquelle se trouve le conducteur soluble (13), et une surface supérieure (22) recouvrant la surface (10a) du substrat isolant (10). Le boîtier (20) est pourvu d'une ouverture (23) qui pénètre dans le boîtier (20) à une position autre que la partie inférieure de la surface latérale (21) qui est reliée à la surface (10a) du substrat isolant (10).
PCT/JP2016/051482 2015-01-20 2016-01-19 Élément fusible et module de circuit WO2016117578A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2015008931A JP2016134317A (ja) 2015-01-20 2015-01-20 ヒューズ素子及び回路モジュール
JP2015-008931 2015-01-20

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WO2016117578A1 true WO2016117578A1 (fr) 2016-07-28

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PCT/JP2016/051482 WO2016117578A1 (fr) 2015-01-20 2016-01-19 Élément fusible et module de circuit

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JP (1) JP2016134317A (fr)
TW (1) TW201633352A (fr)
WO (1) WO2016117578A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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CN114303219A (zh) * 2019-09-04 2022-04-08 迪睿合株式会社 保护元件
JP2022140210A (ja) * 2021-03-11 2022-09-26 功得電子工業股▲分▼有限公司 表面実装ヒューズ
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JP6981953B2 (ja) 2018-11-26 2021-12-17 太平洋精工株式会社 基板表面実装ヒューズ
JP1701720S (fr) * 2021-01-18 2021-12-06
JP1701718S (fr) * 2021-01-18 2021-12-06
JP1701719S (fr) * 2021-01-18 2021-12-06
JP1716066S (ja) 2021-09-01 2022-05-27 ヒューズ

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CN113424289A (zh) * 2019-02-14 2021-09-21 迪睿合株式会社 电路模块
US11804347B2 (en) 2019-08-29 2023-10-31 Dexerials Corporation Protecting device and battery pack
CN114303219A (zh) * 2019-09-04 2022-04-08 迪睿合株式会社 保护元件
CN114303219B (zh) * 2019-09-04 2024-05-28 迪睿合株式会社 保护元件
JP2022140210A (ja) * 2021-03-11 2022-09-26 功得電子工業股▲分▼有限公司 表面実装ヒューズ
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