TW201519546A - Short circuit component, and short circuit - Google Patents

Abstract

An object of the present invention is to implement a bypass element whereby, even with a weak current path, an open circuit is short-circuited with a blowout of a fusible conductor resulting from heating of a heat emitting body. A bypass element comprises: an insulation substrate (10); a heat emitting body (17); first and second electrodes (11, 12) which are mutually adjacent; a third electrode (13) which is adjacent to the first electrode (11); a fourth electrode (14) which is adjacent to the second electrode (12); a first fusible conductor (21) which is mounted across the first and third electrodes (11, 13); a second fusible conductor (22) which is mounted across the second and fourth electrodes (12, 14); a fifth electrode (15) which is connected to the heat emitting body (17); a sixth electrode (16) which is adjacent to the fifth electrode (15); and a third fusible conductor (23) which is mounted across the fifth and sixth electrodes (15, 16). The first and second fusible conductors (21, 22) are blown out by the heat emitting body (17), and the first and second electrodes (11, 12) are short-circuited by the fused conductor thereacross.

Description

Short circuit component, and short circuit

The present invention relates to a short-circuiting element and a short-circuiting circuit that physically and electrically short-circuit a power supply line or a signal line in an open state by an electrical signal. The present application claims priority on the basis of Japanese Patent Application No. 2013-164616, filed on Jan.

Most rechargeable secondary batteries are processed into battery packs and supplied to the user. In particular, in order to ensure the safety of users and electronic equipment, lithium ion secondary batteries having a high weight and energy density are generally provided in a battery pack such as overcharge protection and overdischarge protection. The function of interrupting the output of the battery pack.

Such a protection element may be turned ON/OFF using an FET switch built in a battery pack to perform an overcharge protection or an overdischarge protection operation of the battery pack. However, in the case where the FET switch is short-circuited and damaged for some reason, or a large current flows instantaneously when a lightning surge or the like is applied, or the output voltage is abnormally lowered due to the life of the battery unit, or vice versa. In the case of abnormal voltage, it is still necessary to protect the battery pack or electronic equipment from accidents such as fire. Therefore, in order to safely interrupt the output of the battery unit in any of the above-mentioned abnormal states, a protection element composed of a fuse element having a function of interrupting the current path with an external signal is used.

As a protective element suitable for a protection circuit of a lithium ion secondary battery or the like, such as a patent In Document 1, it is described that a soluble conductor is bridged between a first electrode on a current path, a heating element extraction electrode, and a second electrode to form a part of a current path, and the fusible conductor on the current path is caused by an overcurrent. The self-heating or the heating element provided inside the protective element is blown. Such a protective element blocks the current path by collecting the molten liquid fusible conductor on the conductor layer connected to the heat generating body.

Patent Document 1: Japanese Laid-Open Patent Publication No. 2010-003665

Patent Document 2: Japanese Laid-Open Patent Publication No. 2004-185960

Patent Document 3: Japanese Laid-Open Patent Publication No. 2012-003878

Further, in recent years, HEVs (Hybrid Electric Vehicles) or EVs (Electric Vehicles) using batteries and motors have rapidly spread. As a power source of HEV or EV, a lithium ion secondary battery is gradually used from the viewpoint of energy density and output characteristics. In automotive applications, high voltage and high current are required. Therefore, a dedicated unit capable of withstanding high voltage and large current has been developed, but in consideration of manufacturing cost, in most cases, a plurality of battery cells are connected in series and in parallel, and a common unit is used to secure a required voltage and current.

Here, in a car that is moving at a high speed, there is a case where the driving force of the rapid speed is lowered or the emergency stop is dangerous, and therefore battery management in an emergency state is also required. For example, even if an abnormality of the battery system occurs during running, in order to avoid danger, it is preferable to supply a driving force for moving to a repair factory or a safe place, or a driving force for a warning light and an air conditioner.

However, in the battery pack in which a plurality of battery cells are connected in series in Patent Document 1, only the protective component is provided on the charge and discharge path, and if one of the battery cells is abnormal, it is guaranteed. When the protective element is actuated, the entire charging and discharging path of the battery pack is blocked, and power supply cannot be continuously supplied.

Therefore, there has been proposed a short-circuiting element in which an abnormal battery cell in a battery pack composed of a plurality of cells is excluded, a normal battery cell is effectively utilized, and a bypass path that bypasses only an abnormal battery cell can be formed.

As shown in FIG. 20, the short-circuiting element 50 has two open electrodes 52, 53 which are connected in series with the battery unit 51 in the charge and discharge path and which are normally opened, and short-circuit between the two open electrodes 52, 53 by melting. The fusible conductor 54 and the heat generating body 55 which is connected in series with the fusible conductor 54 and melts the fusible conductor 54.

The heating element 55 is self-heated by the current flowing through the charge and discharge path, and the meltable conductor 54 is melted by the heat (Joule heat). The heating element 55 is connected to a current control element 56 such as an FET. The current control element 56 is controlled to restrict the supply of power to the heating element 55 when the battery unit 51 is normal, and to apply current to the heating element 55 via the charging and discharging path when an abnormality occurs.

When the battery unit 51 detects an abnormal voltage or the like, the battery unit 51 blocks the battery unit 51 from the charging and discharging path and causes the current control unit 56 to actuate the heating element. 55 pass current. Thereby, the meltable conductor 54 is melted by the heat of the heat generating body 55, and the molten conductor is aggregated and bonded to the two open electrodes 52, 53. Therefore, the open electrodes 52, 53 are short-circuited by the molten conductor, whereby a current path bypassing the battery unit 51 can be formed.

However, when the short-circuiting element 50 is used in a digital signal line that flows through a weak current of the power supply line, the heating element 55 cannot be supplied with electric power sufficient to obtain a sufficient amount of heat generated by the fusible conductor 54, and the short-circuiting element 50 is used. Limited to power cord use.

Further, the current control element 56 that switches the current path to the side of the heating element 55 is also accompanied As the current rating increases, the rating is likewise required to increase. Also, high rating current control components are generally expensive and disadvantageous in terms of cost.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a short-circuiting element and a short-circuiting circuit capable of supplying sufficient power to a heat generating body to melt a fusible conductor even when assembled in a weak current path, and can be used for all purposes. .

In order to solve the above problems, the short-circuiting element of the present invention includes: an insulating substrate; a heat generating body; first and second electrodes are disposed adjacent to each other on the insulating substrate; and a third electrode is disposed adjacent to the first electrode; The electrode is disposed adjacent to the second electrode; the first fusible conductor is mounted from the first electrode to the third electrode, and the first electrode and the third electrode are heated by the heat generating body The second fusible conductor is mounted from the second electrode to the fourth electrode, and is melted between the second electrode and the fourth electrode by heating from the heating element; a fifth electrode electrically connected to the heating element; a sixth electrode disposed adjacent to the fifth electrode; and a third meltable conductor mounted on the sixth electrode and extending to the sixth electrode The body is connected in series, and is melted between the fifth electrode and the sixth electrode by heating from the heating element; and the first and second meltable conductors are melted by heating from the heating element, and are aggregated in the above Melting on the first and second electrodes The fusion conductors are combined to short-circuit the first and second electrodes.

Further, the short circuit of the present invention includes: a first circuit having a first fuse; and first and second electrodes which are formed adjacent to each other and insulated; and a second circuit electrically and independently formed from the first circuit a heating element and a second fuse connected to one end of the heating element; and the first fuse is melted by the heat generated from the heating element by applying a current to the second circuit, and the first and second ends are made After the short circuit between the electrodes, the second fuse is blown to stop The heat of the above heating element is stopped.

According to the present invention, since the current path between the first and second electrodes assembled to the external circuit and the power supply path for the heat generating body that fuses the first and second meltable conductors are electrically independent, regardless of the external circuit In the case of the type, it is possible to supply electric power to the heating element which is sufficient to generate sufficient heat generation for the first and second fusible conductors. Therefore, according to the present invention, as an external circuit, in addition to the power supply circuit, it can be applied to a digital signal circuit that circulates a weak current.

Moreover, according to the present invention, since the current path between the first and second electrodes assembled to the external circuit is electrically independent of the power supply path to the heat generating body, the current control for controlling the power supply to the heat generating body can be controlled. The components are selected according to the rated value of the heating element regardless of the current rating of the external circuit, and can be manufactured at a lower cost.

1‧‧‧Short-circuit components

2‧‧‧Switch

3‧‧‧1st circuit

4‧‧‧2nd circuit

10‧‧‧Insert substrate

10a‧‧‧ surface

10b‧‧‧back

11‧‧‧1st electrode

11a‧‧‧1st electrode terminal

12‧‧‧2nd electrode

12a‧‧‧2nd electrode terminal

13‧‧‧3rd electrode

14‧‧‧4th electrode

15‧‧‧5th electrode

15a‧‧‧Under the Ministry

15b‧‧‧Upper Department

16‧‧‧6th electrode

16a‧‧‧6th electrode terminal

17‧‧‧heating body

18‧‧‧Insulation

19‧‧‧Feature body extraction electrode

20‧‧‧heating electrode terminal

21‧‧‧1st fusible conductor

22‧‧‧2nd fusible conductor

23‧‧‧3rd fusible conductor

25‧‧‧Insulating components

26‧‧‧Building solder

27‧‧‧through holes

28‧‧‧Insulated wall

29‧‧‧ Covering components

30‧‧‧Short circuit

31‧‧‧External Circuit

32‧‧‧ Flux

33‧‧‧ Current control components

34‧‧‧External power supply

35‧‧‧Detection circuit

40‧‧‧Short-circuit components

50‧‧‧Short-circuit components

60‧‧‧ Circuitry

61‧‧‧ battery unit

62‧‧‧protection resistance

63‧‧‧Protection components

64‧‧‧ battery unit

70‧‧‧High melting point metal layer

71‧‧‧Low-melting metal layer

72‧‧‧ openings

73‧‧‧ openings

74‧‧‧ openings

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a view showing a short-circuiting element to which the present invention is applied, (A) is a plan view, and (B) is a cross-sectional view.

Fig. 2 is a plan view showing the heat generating center of the heat generating body in the short-circuiting member.

Fig. 3 is a circuit diagram showing a short-circuiting element to which the present invention is applied.

Fig. 4 is a circuit diagram showing a short circuit to which the present invention is applied.

Fig. 5 is a view showing a short-circuiting element short-circuited between the first and second electrodes, (A) is a cross-sectional view, and (B) is a circuit diagram.

Fig. 6 is a view showing a short-circuiting element in which the fifth and sixth electrodes are blocked and the heat generation of the heating element is stopped, (A) is a cross-sectional view, and (B) is a circuit diagram.

Fig. 7 is a view showing another short-circuiting element to which the present invention is applied, (A) is a plan view, and (B) is a cross-sectional view.

Fig. 8 is a view showing another short-circuiting element to which the present invention is applied, (A) is a plan view, and (B) is a cross-sectional view.

Fig. 9 is a cross-sectional view showing a short-circuiting element in which a heating element is formed on the back surface of an insulating substrate.

Fig. 10 is a cross-sectional view showing a short-circuiting element in which a heat generating body is formed inside an insulating layer.

Fig. 11 is a cross-sectional view showing a short-circuiting element in which a heating element is formed inside an insulating layer.

Fig. 12 is a plan view showing a short-circuiting element in which a heating element and first to sixth electrodes are formed on the surface of an insulating substrate.

Fig. 13 is a circuit diagram of a battery pack having a short-circuiting element having a protective resistor.

14 is a perspective view showing a fusible conductor having a high melting point metal layer and a low melting point metal layer and having a coated structure, and (A) shows a structure in which a high melting point metal layer is used as an inner layer and covered with a low melting point metal layer, (B) The structure showing a low melting point metal layer as an inner layer and a high melting point metal layer is shown.

Fig. 15 is a perspective view showing a fusible conductor having a laminated structure of a high melting point metal layer and a low melting point metal layer, wherein (A) shows an upper and lower double layer structure, and (B) shows a three layer structure of an inner layer and an outer layer.

Figure 16 is a cross-sectional view showing a fusible conductor having a multilayer structure of a high melting point metal layer and a low melting point metal layer.

17 is a plan view showing a fusible conductor in which a linear opening is formed on a surface of a high-melting-point metal layer and a low-melting-point metal layer is exposed, and (A) is formed with an opening in a longitudinal direction, and (B) is in a width direction. An opening is formed.

Fig. 18 is a plan view showing a fusible conductor in which a circular opening is formed on the surface of the high-melting-point metal layer and the low-melting-point metal layer is exposed.

Fig. 19 is a plan view showing a fusible conductor in which a circular opening portion is formed in a high melting point metal layer and a low melting point metal is filled inside.

Fig. 20 is a circuit diagram showing a battery circuit using the short-circuiting element of the reference example.

Hereinafter, a short-circuiting element and a short-circuiting circuit to which the present invention is applied will be described in detail with reference to the drawings. The present invention is not limited to the embodiments described below, and various modifications can be made without departing from the spirit and scope of the invention. Moreover, the drawings are shown in a schematic manner, and there are cases where the ratio of each size is different from the reality. The specific dimensions and the like should be judged by the following instructions. Further, the drawings naturally contain portions having different dimensional relationships or ratios from each other.

[short circuit element]

[First form]

As shown in Fig. 1 (A) and (B), the short-circuiting element 1 of the present invention includes an insulating substrate 10, a heating element 17, and first and second electrodes 11, 12 on the surface 10a side of the insulating substrate 10. The third electrode 13 is disposed adjacent to the first electrode 11; the fourth electrode 14 is disposed adjacent to the second electrode 12; and the first soluble conductor 21 extends from the first electrode 11 to the third electrode 13 It is mounted, and is melted between the first electrode 11 and the third electrode 13 by heating from the heating element 17; the second soluble conductor 22 is mounted from the second electrode 12 to the fourth electrode 14 by the second electrode 12 The heating from the heating element 17 is blown between the second electrode 12 and the fourth electrode 14.

Further, the short-circuiting element 1 includes a fifth electrode 15 electrically connected to the heating element 17 on the surface 10a side of the insulating substrate 10, a sixth electrode 16 disposed adjacent to the fifth electrode 15, and a third fusible conductor 23, By being mounted from the fifth electrode 15 to the sixth electrode 16 and being connected in series with the heating element 17, the heating is performed between the fifth electrode 15 and the sixth electrode 16 by heating from the heating element 17.

The short-circuiting element 1 is heated by the heating element 17 to make the first and second fusible conductors 21, 22 is melted, and the molten conductors agglomerated on the first and second electrodes 11, 12 are combined to short-circuit the first and second electrodes 11, 12.

The insulating substrate 10 is formed into a substantially square shape using an insulating member such as alumina, glass ceramic, mullite, or zirconia. In addition to the insulating substrate 10, a material for a printed wiring board such as a glass epoxy substrate or a phenolic substrate may be used. However, it is necessary to pay attention to the temperature at which the first to third soluble conductors 21 to 23 are blown.

The heating element 17 is a conductive member having a high electric resistance value and generating heat when energized, and is made of, for example, W, Mo, Ru or the like. The alloy or the composition, the powder of the compound, the resin binder, and the like are mixed by a screen printing technique to form a paste, and a pattern is formed on the insulating substrate 10, and firing or the like is formed.

The heating element 17 is covered by the insulating layer 18 on the surface 10a of the insulating substrate 10. The insulating layer 18 is provided to protect and insulate the heating element 17, and is provided to transmit the heat of the heating element 17 to the first to sixth electrodes 11 to 16 with good efficiency, and is composed of, for example, a glass layer. When the first to sixth electrodes 11 to 16 are heated by the heating element 17, the molten conductors of the first to third fusible conductors 21 to 23 can be easily aggregated.

Further, one end of the heating element 17 is connected to the heating element extraction electrode 19 formed on the insulating substrate 10, and the other end is connected to a fifth electrode 15 which will be described later. The heat generating body lead electrode 19 is formed with a heat generating body electrode terminal portion 20 facing the side edge of the insulating substrate 10. The heating element extraction electrode 19 is connected to an external connection terminal (not shown) provided on the back surface of the insulating substrate 10 through the through hole 27. The heating element 17 is connected to the heating element lead electrode 19, the heating element terminal portion 20, and the external connection terminal to a current control element 33 which will be described later.

[1st to 6th electrodes]

The first to sixth electrodes 11 to 16 are formed on the insulating layer 18 covering the heating element 17. The first electrode 11 is formed adjacent to the second electrode 12 on one side and insulated by being separated from each other. The third electrode 13 is formed on the other side of the first electrode 11, and the first and third electrodes 11, 13 are supported to support both side edges of the first fusible conductor 21, thereby achieving the position of the first fusible conductor 21. Offset prevention. The first electrode 11 and the third electrode 13 are electrically connected by being integrally formed on the insulating layer 18, and are physically separated by an insulating member 25 such as laminated glass. By integrally forming the first and third electrodes 11 and 13 on the insulating layer 18 and laminating the insulating member 25, the first soluble conductor 21 is laminated on the insulating member 25, and the insulating member 25 can exhibit heat of the heating element 17. The function of a heat spreader that transmits the first fusible conductor 21 or the first and third electrodes 11 and 13 with good efficiency. Therefore, after the short-circuiting element 1 generates heat, the first fusible conductor 21 can be blown in a short time.

The first and third electrodes 11 and 13 are mounted with a first fusible conductor 21 to be described later through the solder 26 for mounting. Further, the first electrode 11 is formed with a first electrode terminal portion 11a that faces the side surface of the insulating substrate 10. The first electrode terminal portion 11a is connected to an external connection terminal (not shown) provided on the back surface of the insulating substrate 10 through the through hole 27. The first electrode terminal portion 11a is connected to one end of a current path of the element constituting the short-circuiting element 1 through an external connection terminal.

The fourth electrode 14 is formed on the opposite side of the second electrode 12 from the side adjacent to the first electrode 11, and the second and fourth electrodes 12, 14 are supported to support the second meltable conductor 22 The side edge prevents the positional deviation of the second fusible conductor 22 from being prevented. Similarly to the first and third electrodes, the second electrode 12 and the fourth electrode 14 are electrically connected to each other by being integrally formed on the insulating layer 18, and are physically separated by an insulating member 25 such as laminated glass. The second and fourth electrodes 12 and 14 are mounted with a second fusible conductor 22 to be described later through the solder 26 for mounting. Further, the second electrode 12 is formed with a second electrode terminal portion 12a facing the side surface of the insulating substrate 10. The second electrode terminal portion 12a is transmitted through The through hole 27 is connected to an external connection terminal (not shown) provided on the back surface of the insulating substrate 10. The second electrode terminal portion 12a is connected to the other end of the current path of the element constituting the short-circuiting element 1 through the external connection terminal.

Since the first and second electrodes 11 and 12 are short-circuited by the aggregation and bonding of the molten conductors of the first and second fusible conductors 21 and 22, it is preferable to maintain more molten conductors and to reliably bond them. The method is formed to have a wider area than the third and fourth electrodes 13 and 14 (see FIG. 1(B)).

The fifth electrode 15 has a layer portion 15a that is connected to the heating element 17, and a layer portion 15b that is formed on the insulating layer 18 and that is mounted on the third meltable conductor 23. The sixth electrode 16 is provided at a predetermined distance from the opposite side of the lower portion 15a side of the layer portion 15b of the fifth electrode 15. The fifth and sixth electrodes 15 and 16 are mounted with a third fusible conductor 23 to be described later through the solder 26 for mounting. Further, the sixth electrode 16 is formed with a sixth electrode terminal portion 16a facing the side surface of the insulating substrate 10. The sixth electrode terminal portion 16a is connected to an external connection terminal (not shown) provided on the back surface of the insulating substrate 10 through the through hole 27. The sixth electrode terminal portion 16a is connected to an external power source 34 that supplies a current to the heating element 17 through an external connection terminal.

The first to sixth electrodes 11 to 16 and the heating element extraction electrode 19 can be formed using a general electrode material such as Cu or Ag. Further, it is preferable that at least the first and second electrodes 11 and 12 are formed by Ni/Au plating, Ni/Pd plating, Ni/Pd/Au plating, or the like by a known plating treatment. Membrane. Thereby, oxidation of the first and second electrodes 11 and 12 can be prevented, and the molten conductor can be surely held. Further, in the case where the short-circuiting element 1 is reflowed, the solder 26 for connecting the first and second fusible conductors 21, 22 or the outer layer of the first and second fusible conductors 21, 22 is formed. The low-melting-point metal is melted to prevent the first and second electrodes 11, 12 from being cut by the erosion (solder erosion). Further, in addition to the first and second electrodes 11, 12, of course, the surfaces of the third to sixth electrodes 13 to 16 may be formed. It is a film of Ni/Au plating, Ni/Pd plating, Ni/Pd/Au plating, or the like.

Further, the first electrode terminal portion 11a, the second electrode terminal portion 12a, the sixth electrode terminal portion 16a, and the heat generating body electrode terminal portion 20 which face the side faces of the insulating substrate 10 are formed to prevent the short-circuiting member 1 from being formed. The solder which is mounted on the circuit board rises to the insulating wall 28 of the surface 10a of the insulating substrate 10. The insulating wall 28 provided in the first electrode terminal portion 11a is formed along the mounting region of the first and second meltable conductors 21, 22 of the first to fourth electrodes 11 to 14 across the second electrode 12. . Thereby, the first and second meltable conductors 21 and 22 are prevented from flowing out through the first and second electrode terminal portions 11a and 12a, and are surely aggregated and bonded to the first and second electrodes 11 and 12.

[1st to 3rd fusible conductors]

For the first to third fusible conductors 21 to 23, any metal that is rapidly blown by the heat generation of the heating element 17 can be used, and for example, a lead-free solder containing Sn as a main component can be preferably used.

Further, the first to third fusible conductors 21 to 23 may contain a low melting point metal and a high melting point metal. As the low melting point metal, a solder such as a lead-free solder is preferably used, and as the high melting point metal, Ag, Cu, or an alloy containing the like as a main component is preferably used. When the short-circuiting element 1 is reflowed by containing a high melting point metal and a low melting point metal, even if the reflow temperature exceeds the melting temperature of the low melting point metal layer and the low melting point metal is melted, the low melting point metal can be suppressed from flowing out to the outside. The shape of the first to third fusible conductors 21 to 23 can be maintained. Further, at the time of melting, the low melting point metal is melted, and the high melting point metal is ablated (solder erosion), and can be rapidly melted at a temperature lower than the melting point of the high melting point metal. Further, the first to third fusible conductors 21 to 23 can be formed in various configurations as will be described later.

[First melt of the first fusible conductor]

Here, the short-circuiting element 1 is formed as the first and second fusible conductors 21, 22 and the third fusible conductor 23 First blown. This is because when the third soluble conductor 23 is blown first than the first and second meltable conductors 21, 22, the power supply to the heating element 17 is stopped, and the first and second meltable conductors 21, 22 are not blown. However, the first and second electrodes 11 and 12 cannot be short-circuited.

Therefore, the short-circuiting element 1 is formed such that after the heat generating body 17 generates heat, the first and second meltable conductors 21, 22 are first melted. Specifically, the first and second fusible conductors 21 and 22 of the short-circuiting element 1 are mounted at positions closer to the heat generating center of the heat generating body 17 than the third meltable conductor 23 .

Here, the heat generating center of the heat generating body 17 refers to a region of the heat distribution generated by the heat generation of the heat generating body 17 at the highest temperature in the initial stage of heat generation. The heat generated from the heat generating body 17 is the largest in heat release from the insulating substrate 10, and the heat is diffused to the insulating substrate 10 when the insulating substrate 10 is formed of a ceramic material having excellent thermal shock resistance and high thermal conductivity. Therefore, the heat generating body 17 is the hottest at the center of the farthest distance from the outer edge of the insulating substrate 10 at the initial stage of the heat generation at which the energization has started, and is more radiated as the outer edge is in contact with the insulating substrate 10. The temperature is harder to rise.

Therefore, as shown in FIG. 2, in the short-circuiting element 1, the first and second meltable conductors 21, 22 are mounted on the heat-generating center C which is the highest temperature in the initial stage of heat generation of the heat-generating body 17 closer to the third meltable conductor 23. The position is such that the heat is transferred earlier than the third fusible conductor 23 to be blown. Since the third fusible conductor 23 is heated slowly by the first and second fusible conductors 21 and 22, the first and second fusible conductors 21 and 22 are blown and then blown.

Further, the short-circuiting element 1 can change the shapes of the first and second fusible conductors 21, 22 and the third fusible conductor 23 so that the first and second fusible conductors 21, 22 are smaller than the third fusible conductor 23. First blown. For example, the first and second fusible conductors 21 and 22 are more likely to be blown as the thickness is thinner. Therefore, as shown in FIG. 1(B), the short-circuiting element 1 can be made to have the first and second fusible conductors 21 22 thick The degree is thinner than the third fusible conductor 23 so as to be melted earlier than the third fusible conductor 23. Further, the first to third fusible conductors 21 to 23 may have a structure in which a low melting point metal foil is coated with a high melting point metal, for example, and the thickness of the high melting point metal layer may be in the first and second soluble conductors. 21, 22 is thinner, thicker in the third fusible conductor 23, or the thickness of the low-melting-point metal foil may be thinner in the first and second fusible conductors 21, 22, in the third The melted conductor 23 is thicker.

In addition, in the short-circuiting element 1, the first and second fusible conductors 21, 22 may be formed of a low-melting-point metal, and the third fusible conductor 23 may be formed by a high-melting-point metal or the like by changing the layer structure. When the melting points are different, the first and second fusible conductors 21, 22 are relatively easily melted compared to the third fusible conductor 23, and the first and second fusible conductors 21, 22 are made third by the heat generated by the heating element 17. The fusible conductor 23 is first blown.

[other]

In addition, in order to prevent oxidation of the first to third fusible conductors 21 to 23 and improve wettability at the time of melting, the flux 32 is applied to the first to third fusible conductors 21 to 23.

The insulating substrate 10 of the short-circuiting element 1 is covered by the covering member 29 to protect the inside thereof. The cover member 29 has a side wall 29a and a top surface portion 29b, and is connected to the insulating substrate 10 via the side wall 29a to form a lid that closes the inside of the short-circuiting element 1. The cover member 29 is formed of an insulating member such as a thermoplastic plastic, a ceramic, or a glass epoxy substrate, similarly to the above-described insulating substrate 10.

Further, the cover member 29 may have a cover portion electrode 29c formed on the inner surface side of the top surface portion 29b. The cover portion electrode 29c is formed at a position overlapping the first and second electrodes 11 and 12. The cover portion electrode 29c is heated by the heat generating body 17 to melt the first and second meltable conductors 21, 22, and then is wetted by the molten conductor which is aggregated on the first and second electrodes 11, 12, and is melted and melted. guide The body is surely spread over the first and second electrodes 11 and 12, and the allowable amount of the held molten conductor can be increased.

[circuit composition]

Next, the circuit configuration of the short-circuiting element 1 will be described. Figure 3 shows a circuit diagram of the short-circuiting element 1. FIG. 4 shows an example of a short circuit 30 to which the short-circuiting element 1 is applied.

The short-circuiting element 1, the first electrode 11 and the second electrode 12 are mutually in an initial state The switch 2, which is open and short-circuited by the first and second soluble conductors 21, 22, has a first circuit 3 in which the first electrode 11 and the second electrode 12 are connected by the switch 2. The first circuit 3 is assembled between various external circuits 31A, 31B such as a power supply circuit or a digital signal circuit by being connected in series to a current path of the circuit board on which the short-circuiting element 1 is mounted.

Further, in the short-circuiting element 1, the fifth electrode 15, the sixth electrode 16, the heat generating body 17, and the third meltable conductor 23 constitute a power supply path to the heat generating body 17 in an initial state, and constitute heat generated by the heat generating body 17. The third meltable conductor 23 is blown and the second circuit 4 of the power supply path is blocked. Since the second circuit 4 is electrically independent of the first circuit 3, the first and second fusible conductors 21, 22 are melted by the heat of the heat generating body 17, and thus are thermally connected to the first circuit 3. One end of the heating element 17 passes through the heating element extraction electrode 19 and the heating element electrode terminal portion 20 is connected to a current control element 33 that controls the supply of power to the second circuit 4. Further, the other end of the heating element 17 is connected in series to the third fusible conductor 23 through the fifth electrode 15. Further, the third fusible conductor 23 is mounted on the fifth and sixth electrodes 15 and 16, and the sixth electrode 16 is connected to the external power source 34.

The current control element 33 controls a switching element that supplies power to the second circuit 4, and is connected to a detection circuit 35 that is configured by, for example, an FET and detects whether or not the first circuit 3 is physically short-circuited. The detecting circuit 35 detects whether or not the various external circuits 31A, 31B are generated (the short-circuiting element 1 is assembled) The circuit necessary for energizing the first circuit 3), for example, the construction of the bypass current path when the battery pack is abnormally voltage, and the communication number of the data server when the hacker or the intrusion in the network communication device is reversed When the path is constructed, or the device or the soft body is activated, etc., if the current path between the external circuits 31A and 31B is physically and irreversibly short-circuited by the short circuit of the first circuit 3, the current control element 33 is operated. .

As a result, the heat generating body 17 generates heat by supplying electric power of the external power source 34 to the second circuit 4, and first, the first and second meltable conductors 21, 22 are blown (FIG. 5(A)(B)). Most of the molten conductors of the first and second meltable conductors 21, 22 are drawn to the first and second electrodes 11, 12 having a high wettability and a wide area, and the molten conductor aggregated on the first electrode 11 is The molten conductor aggregated on the second electrode 12 is bonded. Thereby, the first electrode 11 and the second electrode 12 are short-circuited by the molten conductor, and the external circuits 31A and 31B are connected.

At this time, in the short-circuiting element 1, the first and second meltable conductors 21, 22 are disposed closer to the heat-generating center of the heat-generating body 17 than the third meltable conductor 23, and by the first and second The melted conductors 21, 22 are formed to be thinner than the third fusible conductor 23, and can be melted earlier than the third fusible conductor 23. Therefore, in the short-circuiting element 1, the heating element 17 of the second circuit 4 can be surely supplied with power until the first circuit 3 is short-circuited.

Further, the short-circuiting element 1 can be formed such that the first and second electrodes 11 and 12 are wider than the third and fourth electrodes 13 and 14, so that a larger number of molten conductors can be held, and the molten conductor can be surely joined. The first and second electrodes 11 and 12 are short-circuited (Fig. 1 (B), Fig. 5 (A)).

The heating element 17 continues to generate heat even after the first and second fusible conductors 21 and 22 are blown, but the third fusible conductor 23 is also blown after the first and second fusible conductors 21 and 22, so that the heating element 17 is subsequently blown. The second circuit 4 is also blocked (Fig. 6(A)(B)). Thereby, the power supply path to the heating element 17 is blocked. Stop heating.

According to the short-circuiting element 1 and the short-circuiting circuit 30, since the first circuit 3 incorporated in the external circuits 31A and 31B and the second circuit 4 in which the first circuit 3 is short-circuited are electrically independent, the type of the external circuit 31 is different. In any case, the power supply voltage of the second circuit can be set high, and even if the heating element 17 of the low rated value is used, it is possible to supply a sufficient amount of heat sufficient to melt the first and second fusible conductors 21, 22. electric power. Therefore, the short circuit element 1 and the short circuit 30 are used as the external circuit 31 for assembling the first circuit 3, and can be applied to a digital signal circuit in which a weak current flows, in addition to the power supply circuit.

Further, since the short circuit element 1 and the short circuit 30 are electrically formed independently of the first circuit 3, the current control element 33 for controlling the power supply to the heating element 17 can be prevented from the first circuit 3. The rating is selected depending on the rating of the heating element 17, and it can be manufactured more inexpensively by using the current control element 33 that controls the low-rated heating element 17 (for example, 1A).

[Second form]

Further, the short-circuiting element to which the present invention is applied may be configured as follows. In the following description, the same components as those of the above-described short-circuiting element 1 and short-circuiting circuit 30 are denoted by the same reference numerals, and their description will be omitted.

As shown in FIGS. 7(A) and (B), the short-circuiting element 40 of the second embodiment is different from the short-circuiting element 1 in that the fourth electrode 14 and the second meltable conductor 22 are not formed. In the short-circuiting element 40, the first meltable conductor 21 is melted, and the molten conductor is aggregated throughout the first electrode 11 and the second electrode 12, whereby the first and second electrodes 11 and 12 can be short-circuited.

Further, similarly, in the short-circuiting element 40, the first fusible conductor 21 is mounted on the third The fusible conductor 23 is close to the position of the heat generating center of the heat generating body 17. Further, in the short-circuiting element 40, the first fusible conductor 21 is formed to be thinner than the third fusible conductor 23. Thereby, similarly, the short-circuiting element 40 can fuse the first meltable conductor 21 to the third meltable conductor 23 first.

Further, similarly, in the short-circuiting element 40, the first electrode 11 and the third electrode 13 are electrically connected to each other by being integrally formed on the insulating layer 18, and are physically separated by an insulating member 25 such as laminated glass. Further, in the second electrode 12, the side adjacent to the first electrode 11 is exposed to the same extent as the first electrode 11, and the side opposite to the first electrode 11 is covered by the insulating member 25.

[Third form]

As shown in FIG. 8, the short-circuiting element 50 of the third aspect is different from the short-circuiting element 1 in that the fourth electrode 14 is not formed. In the short-circuiting element 50, the first and second fusible conductors 21 and 22 are melted, and the molten conductor is aggregated and bonded to the first electrode 11 and the second electrode 12, whereby the first and second electrodes 11 can be made. 12 short circuit.

Further, similarly, in the short-circuiting element 50, the first and second meltable conductors 21 and 22 are mounted closer to the heat generating center of the heat generating body 17 than the third meltable conductor 23. Further, in the short-circuiting element 50, the first and second fusible conductors 21, 22 are formed to be thinner than the third fusible conductor 23. Thereby, similarly, the short-circuiting element 50 can fuse the first and second meltable conductors 21, 22 earlier than the third meltable conductor 23.

Further, similarly, in the short-circuiting element 50, the first electrode 11 and the third electrode 13 are electrically connected by being integrally formed on the insulating layer 18, and are physically separated by the insulating member 25 such as laminated glass. Further, in the second electrode 12, the side adjacent to the first electrode 11 is exposed to the same extent as the first electrode 11, and the second fusible conductor 22 is configured to pass through the solder for mounting, and is opposite to the first electrode 11. The side is covered by the insulating member 25.

[heating stuff]

In the short-circuiting element 1 described above, the heating element 17 is formed on the surface 10a of the insulating substrate 10 and the first to third fusible conductors 21 to 23 are overlapped, but the heating element 17 may be formed in insulation as shown in FIG. The back surface 10b of the substrate 10. In this case, the heating element 17 is covered by the insulating layer 18 on the back surface 10b of the insulating substrate 10. Further, the heat generating body lead electrode 19 and the heat generating body electrode terminal portion 20 which are connected to one end of the heat generating body 17 are formed on the back surface 10b of the insulating substrate 10 in the same manner. In the fifth electrode 15, the layer portion 15a is formed on the back surface 10b of the insulating substrate 10, and the upper portion 15b of the third soluble conductor 23 is formed on the surface 10a of the insulating substrate 10, and the lower layer portion 15a is formed. The upper layer portion 15b is continuous through the conductive via holes.

Further, the heating element 17 is preferably formed at a position overlapping the first to third fusible conductors 21 to 23 on the back surface 10b of the insulating substrate 10. At this time, it is preferable that the first and second meltable conductors 21 and 22 are mounted closer to the heat generating center of the heat generating body 17 than the third meltable conductor 23.

The short-circuiting element 1 is formed on the back surface 10b of the insulating substrate 10 by the heating element 17, and the surface 10a of the insulating substrate 10 is planarized, whereby the first to sixth electrodes 11 to 16 can be formed on the surface 10a. Therefore, the short-circuiting element 1 can simplify the processes of the first to sixth electrodes 11 to 16, and achieve a low height.

Further, when the short-circuiting element 1 is formed on the back surface 10b of the insulating substrate 10, a material having excellent thermal conductivity such as precision ceramics can be used as the material of the insulating substrate 10, and the heat generating body 17 can be used. The first to third fusible conductors 21 to 23 are heated and melted in the same manner as the case of laminating on the surface 10a of the insulating substrate 10.

Further, in the short-circuiting elements 40, 50, the heat generating body 17 may be formed on the back surface 10b of the insulating substrate 10.

Further, in the short-circuiting element 1, as shown in FIG. 10, the heat generating body 17 may be formed inside the insulating layer 18 formed on the surface 10a of the insulating substrate 10. In this case, the heat generating body lead-out electrode 19 to which one end of the heat generating body 17 is connected is formed, and one end portion connected to the heat generating body 17 is also formed inside the insulating layer 18. Further, of the fifth electrode 15 to which the other end of the heating element 17 is connected, the lower layer portion 15a is formed inside the insulating layer 18.

Further, it is preferable that the heating element 17 is formed inside the insulating layer 18 at a position overlapping the first to third fusible conductors 21 to 23. At this time, it is preferable that the first and second meltable conductors 21 and 22 are mounted closer to the heat generating center of the heat generating body 17 than the third meltable conductor 23. Further, in the short-circuiting element 1, the heat generating body 17 may be formed inside the insulating layer 18 formed on the back surface 10b of the insulating substrate 10.

Further, in the short-circuiting members 40, 50, the heat generating body 17 may be formed inside the insulating layer 18 formed on the surface 10a or the back surface 10b of the insulating substrate 10.

Further, as shown in FIG. 11, the short-circuiting element 1 may form the heat generating body 17 inside the insulating substrate 10. In this case, it is not necessary to provide the insulating layer 18 covering the heating element 17. Further, the heating element extraction electrode 19 having one end of the heating element 17 is connected, and one end portion of the connection with the heating element 17 is formed inside the insulating substrate 10, and is transmitted through the conductive via hole and the other end portion of the surface 10a of the insulating substrate 10 and is heated. The body electrode terminal portion 20 is connected. In the fifth electrode 15, the layer portion 15a is formed inside the insulating substrate 10 in connection with the other end of the heating element 17, and the upper portion 15b of the third soluble conductor 23 is continuous via the conductive via.

Further, the heating element 17 is preferably formed at a position overlapping the first to third fusible conductors 21 to 23 inside the insulating substrate 10. At this time, it is preferable that the first and second meltable conductors 21 and 22 are mounted closer to the heat generating center of the heat generating body 17 than the third meltable conductor 23.

In addition, the short-circuiting elements 40, 50 may also form the heating element 17 on the insulating substrate. 10 internal.

Further, as shown in FIG. 12, the short-circuiting element 1 may be formed by arranging the heat generating body 17 on the front surface 10a of the insulating substrate 10 and the first to sixth electrodes 11 to 16. In this case, the heating element 17 is covered by the insulating layer 18. Further, the fifth electrode 15 connected to the other end of the heating element 17 is formed in a single layer on the surface 10a of the insulating substrate 10. Further, it is preferable that the first and second meltable conductors 21 and 22 are mounted at positions closer to the heat generating center of the heat generating body 17 than the third meltable conductor 23.

Further, in the short-circuiting elements 40, 50, the heating element 17 may be formed by arranging the first to sixth electrodes 11 to 16 on the surface 10a of the insulating substrate 10.

[protective resistance]

Further, the short-circuiting element 1 may be configured to include a protective resistor connected to either of the first electrode 11 or the second electrode 12. Here, the protective resistance is a resistance value equivalent to the internal resistance of the electronic component connected to the short-circuiting element 1. For example, as shown in FIG. 13, the short-circuiting element 1 is used in a circuit 60 in a battery pack 40 of a lithium ion secondary battery for bypassing a bypass current path in which a battery unit 61 that generates an abnormal voltage such as overcharge or overdischarge is bypassed. In the case of construction, the second electrode 12 is connected to a protective resistor 62 having a resistance value corresponding to the internal resistance of the battery unit 61.

In Fig. 13, the battery pack circuit 60 includes a plurality of battery units 64, the battery unit 64 is a short-circuiting element 1, a current control element 33 for controlling the operation of the short-circuiting element 1, a battery unit 61, and a battery unit 61 from a charge and discharge path. The upper blocking protection element 63 is constructed, and a plurality of battery units 64 are connected in series.

Further, the battery pack circuit 60 includes a detection circuit 35 that detects the voltage of the battery unit 61 of each battery unit 64 and outputs an abnormal signal to the protection element 63 and the current control element 33.

Each battery unit 64 has a protective element 63 connected in series with the battery unit 61. Again, electricity In the cell unit 64, the first electrode 11 of the short-circuiting element 1 is connected to the open end of the protective element 63 through the protective resistor 62, and the second electrode 12 is connected to the open end of the battery unit 61, whereby the protective element 63 and the battery unit 61 and the short-circuiting element are protected. 1 parallel.

Further, in the battery unit 64, the current control element 33 and the protection element 63 are connected to the detection circuit 35, respectively. The detection circuit 35 is connected to each battery unit 61, and detects the voltage value of each battery unit 61. When the battery unit 61 is overcharged or overdischarged, the protection element 63 of the battery unit 64 having the battery unit 61 is driven and The current control element 33 outputs an abnormal signal.

The protective element 62 can be constituted by, for example, a field effect transistor (hereinafter, referred to as an FET). Further, the protective element 62 can be made to have a fusible conductor that is connected to one of the pair of electrodes on the charge and discharge path, is connected between the electrodes, and is short-circuited between the electrodes, and is connected to the soluble conductor in series to generate heat when the voltage is abnormal. The component of the heating element in which the fusible conductor is melted.

The circuit 60 performs the following control, that is, the protection element 63 and the short-circuit element 1 when the voltage value of the battery unit 61 exceeds a predetermined over-discharge or over-charge state according to the detection signal output from the detection circuit 35. The battery unit 64 is blocked from the charge and discharge current path, and the switch 2 of the short-circuiting element 1 is short-circuited to form a bypass current path bypassing the battery unit 64.

In the circuit 60 of the battery pack described above, since the switch 20 of the short-circuiting element 1 is opened, current flows to the side of the protective element 63 and the battery unit 61. In the circuit 60, if the battery unit 61 detects a voltage abnormality or the like, the detection circuit 35 outputs an abnormal signal to the protection element 63, and the protection element 63 shields the abnormal battery unit 61 from the charge and discharge current path of the battery pack. Broken.

Next, the circuit 60 is controlled to output an abnormal signal to the current control element 33 by the detecting circuit 35 to cause current to flow to the heat generating body 17 of the short-circuiting element 1. The short-circuiting element 1 heats and melts the first and second meltable conductors 21, 22 by the heating element 17, whereby the molten conductor is aggregated and bonded to the first and second electrodes 11 and 12 to make the first The second electrodes 11, 12 are short-circuited. Thereby, the circuit 60 can form a bypass current path for bypassing the battery unit 61 by the short-circuiting element 1. Further, the short-circuiting element 1 is blown by the first and second fusible conductors 21, 22, and then the third fusible conductor 23 is blown, and the supply of power to the heating element 17 is stopped.

Thereby, in the case where an abnormality occurs in one battery unit 61, the circuit 60 can also form a bypass current path through the short-circuiting element 1 in the battery unit 61, and the charge and discharge function can be maintained by the remaining normal battery unit 61. At this time, since the short-circuiting element 1 is provided with the protective element 62 having substantially the same resistance as the internal resistance of the battery unit 61 that is interrupted, the circuit 60 can be set to be normal after the bypass current path is constructed. The same resistance value.

Further, the protective element 62 may be formed on the short-circuiting element 1 as shown in FIG. 13, or may be formed in the circuit 60 and connected to the first electrode terminal portion 11a of the short-circuiting element 1.

[1st to 3rd fusible conductors]

As described above, any one or all of the first to third fusible conductors 21 to 23 may contain a low melting point metal and a high melting point metal. In this case, as shown in FIG. 14(A), the first to third fusible conductors 21 to 23 may be formed of a high melting point metal layer which is formed of an alloy having Ag, Cu or the like as an essential component in the inner layer. 70. A fusible conductor of a low-melting-point metal layer 71 comprising a lead-free solder containing Sn as a main component as an outer layer. In this case, the first to third fusible conductors 21 to 23 may be formed such that the high-melting-point metal layer 70 is entirely covered by the low-melting-point metal layer 71, or may be covered except for one of the opposite sides. structure. Coating structure of high melting point metal layer 70 and low melting point metal layer 71 It can be formed by a known film forming technique such as plating.

Further, as shown in Fig. 14(B), the first to third fusible conductors 21 to 23 are also made of a fusible conductor having a low-melting-point metal layer 71 as an inner layer and a high-melting-point metal layer 70 as an outer layer. In this case, the first to third fusible conductors 21 to 23 may be formed such that the low-melting-point metal layer 71 is entirely covered by the high-melting-point metal layer 70, or may be covered except for one of the opposite sides. structure.

Further, as shown in FIG. 15, the first to third fusible conductors 21 to 23 may have a laminated structure in which a high-melting-point metal layer 70 and a low-melting-point metal layer 71 are laminated.

In this case, as shown in FIG. 15(A), the first to third fusible conductors 21 to 23 are formed by being mounted on the lower layer of the first to sixth electrodes 11 to 16 and the upper layer on the lower layer. The double-layer structure can be used as the upper layer of the low-melting-point metal layer 71 as the lower layer of the high-melting-point metal layer 70, or the upper layer of the high-melting-point metal layer 70 as the upper layer of the lower-layered low-melting-point metal layer 71. . Alternatively, as shown in FIG. 15(B), the first to third fusible conductors 21 to 23 may be formed as a three-layer structure composed of an inner layer and an outer layer laminated on the upper and lower layers of the inner layer, and may be used as an inner layer. The upper surface layer of the high-melting-point metal layer 70 serves as the outer layer of the low-melting-point metal layer 71, and conversely, the lower-area layer as the outer layer of the low-melting-point metal layer 71 as the inner layer.

Further, as shown in FIG. 16, the first to third fusible conductors 21 to 23 may have a multilayer structure in which four or more layers of the high-melting-point metal layer 70 and the low-melting-point metal layer 71 are alternately laminated. In this case, the first to third fusible conductors 21 to 23 may have a structure in which the metal layer constituting the outermost layer is entirely covered or covered except for a pair of opposite sides.

Further, the first to third fusible conductors 21 to 23 may also constitute a low melting point of the inner layer. The surface of the metal layer 71 partially deposits the high melting point metal layer 70 in a strip shape. Fig. 17 is a plan view showing the first to third fusible conductors 21 to 23.

The first to third fusible conductors 21 to 23 shown in FIG. 17(A) are formed by forming a plurality of linear high-melting-point metal layers 70 in the longitudinal direction at a predetermined interval in the width direction on the surface of the low-melting-point metal layer 71. Thereby, the linear opening portion 72 is formed along the longitudinal direction, and the low melting point metal layer 71 is exposed from the opening portion 72. The first to third fusible conductors 21 to 23 are exposed from the opening portion 72 by the low-melting-point metal layer 71, and the contact area between the molten low-melting metal and the high-melting-point metal is increased, and the erosion of the high-melting-point metal layer 70 can be further promoted. Act to improve the fuse. The opening portion 72 can be formed by, for example, plating a portion of the metal forming the high melting point metal layer 70 on the low melting point metal layer 71.

Further, as shown in Fig. 17(B), the first to third fusible conductors 21 to 23 may be formed on the surface of the low-melting-point metal layer 71 so as to form a plurality of linear high melting points in the width direction at predetermined intervals in the longitudinal direction. The metal layer 70 is thereby formed with a linear opening portion 72 along the width direction.

Further, as shown in FIG. 18, the first to third fusible conductors 21 to 23 may form a high-melting-point metal layer 70 on the surface of the low-melting-point metal layer 71 and form a circular opening portion 73 in the high-melting-point metal layer 70. From this opening portion 73, the low-melting-point metal layer 71 is exposed. The opening portion 73 can be formed by, for example, applying a partial plating of a metal constituting the high melting point metal layer 70 to the low melting point metal layer 71.

The first to third fusible conductors 21 to 23 are exposed from the opening 73 by the low-melting-point metal layer 71, and the contact area between the molten low-melting metal and the high-melting-point metal is increased, and the erosion of the high-melting-point metal can be further promoted. Improve the fuse.

Further, as shown in FIG. 19, the first to third fusible conductors 21 to 23 may have a plurality of openings 74 formed in the high-melting-point metal layer 70 as an inner layer, and the high-melting-point metal layer 70 may be used. The low melting point metal layer 71 is formed by a plating technique or the like, and is filled in the opening portion 74. Thereby, in the first to third fusible conductors 21 to 23, since the area of the molten low melting point metal in contact with the high melting point metal is increased, the high melting point metal can be eroded by the low melting point metal in a shorter time.

Further, it is preferable that the first to third fusible conductors 21 to 23 have a volume of the low-melting-point metal layer 71 formed to have a large volume of the higher-melting-point metal layer 70. The first to third fusible conductors 21 to 23 are heated by the heat generation of the heating element 17, and the high melting point metal is melted by the melting of the low melting point metal, whereby the melting and melting can be quickly performed. Therefore, the first to third fusible conductors 21 to 23 can be made to have the volume of the low-melting-point metal layer 71 as a bulk of the higher-melting-point metal layer 70, thereby promoting the dissolution and rapidly performing the first The molten conductors on the second electrodes 11, 12 are aggregated or bonded, or the fifth and sixth electrodes 15 and 16 are blocked.

In addition, the short-circuiting element of the present invention is not limited to the case of using a battery pack for a lithium ion secondary battery, and of course, it can also be applied to the interruption and side of a current path of an electric signal such as a power line or a digital signal line of an electronic device. Through a variety of uses. Further, the operation condition of the current control element 33 is not limited to the case where the voltage of the battery unit 61 is abnormal, and can be activated by detecting various accidents such as an abnormal rise in the ambient temperature and flooding.

1‧‧‧Short-circuit components

10‧‧‧Insert substrate

10a‧‧‧ surface

11‧‧‧1st electrode

11a‧‧‧1st electrode terminal

12‧‧‧2nd electrode

12a‧‧‧2nd electrode terminal

13‧‧‧3rd electrode

14‧‧‧4th electrode

15‧‧‧5th electrode

15a‧‧‧Under the Ministry

15b‧‧‧Upper Department

16‧‧‧6th electrode

16a‧‧‧6th electrode terminal

17‧‧‧heating body

18‧‧‧Insulation

19‧‧‧Feature body extraction electrode

20‧‧‧heating electrode terminal

21‧‧‧1st fusible conductor

22‧‧‧2nd fusible conductor

23‧‧‧3rd fusible conductor

25‧‧‧Insulating components

26‧‧‧Building solder

27‧‧‧through holes

28‧‧‧Insulated wall

29‧‧‧ Covering components

29a‧‧‧ Sidewall

29b‧‧‧ top face

29c‧‧‧ Cover electrode

32‧‧‧ Flux

Claims (44)

A short-circuiting element comprising: an insulating substrate; a heating element; the first and second electrodes are disposed adjacent to the insulating substrate; the third electrode is disposed adjacent to the first electrode; and the fourth electrode and the second electrode Provided adjacent to each other; the first fusible conductor is mounted on the first electrode to the third electrode, and is melted between the first electrode and the third electrode by heating from the heating element; the second fusible The conductor is mounted on the second electrode to the fourth electrode, and is heated between the second electrode and the fourth electrode by heating from the heating element; and the fifth electrode is electrically connected to the heating element; a sixth electrode is disposed adjacent to the fifth electrode; and a third meltable conductor is mounted in series with the heat generating body from the fifth electrode to the sixth electrode, and is heated by the heat generating body. The fifth electrode and the sixth electrode are melted; the first and second meltable conductors are melted by heating from the heat generating body, and the molten conductors that are aggregated on the first and second electrodes are joined to each other. Short between the first and second electrodes . The short-circuiting element according to the first aspect of the invention, wherein the first and second meltable conductors are melted and the first and second electrodes are short-circuited, and the third meltable conductor is melted to cover The power supply path to the heating element is broken, and the heat is stopped. A short-circuiting element according to claim 1 or 2, wherein the first electrode and the above The third electrode and the second electrode are electrically connected to the fourth electrode, respectively, and are physically separated by an insulating member. The short-circuiting element according to claim 1 or 2, wherein the first meltable conductor and the second meltable conductor are mounted closer to a heat generating center of the heat generating body than the third meltable conductor. The short-circuiting element according to claim 1 or 2, wherein the first fusible conductor and the second fusible conductor are formed to be thinner than the third fusible conductor. The short-circuiting element according to claim 1 or 2, wherein the first meltable conductor and the second meltable conductor have a lower melting point than the third meltable conductor. The short-circuiting element according to claim 1 or 2, wherein the material structure of the third fusible conductor is the same as that of the first and second fusible conductors. The short-circuiting element according to claim 1 or 2, further comprising: an insulating layer laminated on a surface side of the insulating substrate on which the first to fourth electrodes are formed; wherein the first to fourth electrodes are formed on the surface The heat generating body is formed inside the insulating layer or between the insulating layer and the insulating substrate. The short-circuiting element according to claim 1 or 2, wherein the heat generating body is formed inside the insulating substrate. The short-circuiting element according to claim 1 or 2, wherein the heat generating body is formed on a back surface of the insulating substrate opposite to a surface on which the first to fourth electrodes are formed. The short-circuiting element according to claim 1 or 2, wherein the heat generating body and the first to fourth electrodes are formed on a surface of the insulating substrate on which the first to fourth electrodes are formed. A short-circuiting element comprising: an insulating substrate; a heating element; the first and second electrodes are disposed adjacent to each other on the insulating substrate; the third electrode is disposed adjacent to the first electrode; and the first soluble conductor is mounted on the first electrode The first electrode to the third electrode are blown between the first electrode and the third electrode by heating from the heating element; the fifth electrode is electrically connected to the heating element; and the sixth electrode is The fifth electrode is disposed adjacent to each other; and the third meltable conductor is mounted in series with the heat generating body from the fifth electrode to the sixth electrode, and is heated by the heat generating body to the fifth electrode and The sixth electrode is melted; the first meltable conductor is melted by heating from the heat generating body, and the molten conductor that is aggregated on the first electrode is also aggregated on the second electrode to make the first Short circuit between the second electrodes. The short-circuiting element according to claim 12, wherein the first meltable conductor is melted and the first and second electrodes are short-circuited, and the third meltable conductor is melted to block the The heating path of the heating element stops heating. The short-circuiting element according to claim 12 or 13, wherein the first electrode and the third electrode are electrically connected to each other and are physically separated by an insulating member. A short-circuiting element according to claim 12 or 13, comprising a second meltable conductor mounted on the second electrode; The first and second meltable conductors are melted by heating from the heat generating body, and the molten conductors that are aggregated on the first and second electrodes are coupled to each other to short-circuit the first and second electrodes. The short-circuiting element according to claim 12 or 13, wherein the first meltable conductor is mounted at a position closer to a heat generating center of the heat generating body than the third meltable conductor. The short-circuiting element according to claim 15, wherein the first meltable conductor and the second meltable conductor are mounted closer to a heat generating center of the heat generating body than the third meltable conductor. The short-circuiting element of claim 12 or 13, wherein the thickness of the first fusible conductor is formed to be thinner than the third fusible conductor. The short-circuiting element of claim 15, wherein the first fusible conductor and the second fusible conductor are formed to be thinner than the third fusible conductor. The short-circuiting element of claim 12 or 13, wherein the first meltable conductor has a lower melting point than the third meltable conductor. The short-circuiting element of claim 15, wherein the first meltable conductor and the second meltable conductor have a lower melting point than the third meltable conductor. The short-circuiting element of claim 12 or 13, wherein the material structure of the third fusible conductor is the same as that of the first fusible conductor. The short-circuiting element of claim 15, wherein the material structure of the third fusible conductor is the same as that of the first and second fusible conductors. A short-circuiting element according to claim 12 or 13, comprising: an insulating layer laminated on a surface side of the insulating substrate on which the first to third electrodes are formed; wherein the first to third electrodes are formed On the insulation layer; The heat generating body is formed inside the insulating layer or between the insulating layer and the insulating substrate. The short-circuiting element according to claim 12 or 13, wherein the heat generating body is formed inside the insulating substrate. The short-circuiting element according to claim 12, wherein the heat generating body is formed on a back surface of the insulating substrate opposite to a surface on which the first to third electrodes are formed. The short-circuiting element according to claim 12, wherein the heat generating body and the first to third electrodes are formed on a surface of the insulating substrate on which the first to third electrodes are formed. The short-circuiting element according to any one of claims 1, 2, 12, and 13, wherein at least the surface of the first electrode and the second electrode is coated with Ni/Au plating, Ni/Pd plating, or Any of Ni/Pd/Au plating. The short-circuiting element according to any one of claims 1, 2, 12, and 13, wherein the area of the first electrode is larger than the area of the third electrode. The short-circuiting element according to claim 1 or 2, wherein the area of the first electrode is larger than the area of the third electrode, and the area of the second electrode is larger than the area of the fourth electrode. The short-circuiting element according to any one of claims 1, 2, 12, and 13, further comprising: a covering member provided on the insulating substrate to protect the inside; the covering member and the first electrode and the A cover electrode is formed at a position where the second electrodes overlap. The short-circuiting element according to any one of claims 1, 2, 12, and 13, wherein a protective resistor is connected to the first electrode or the second electrode. The short-circuiting element according to any one of claims 1, 2, 12, and 13, comprising a second fusible conductor mounted on the second electrode; the first fusible conductor and the second fusible guide The system uses Sn-based lead-free solder as the main component. The short-circuiting element according to any one of claims 1, 2, 12, and 13, comprising a second fusible conductor mounted on the second electrode; the first fusible conductor and the second fusible conductor And comprising a low melting point metal and a high melting point metal; and the low melting point metal is melted by heating from the heating element to etch the high melting point metal. The short-circuiting element according to claim 34, wherein the low-melting-point metal-based solder; the high-melting-point metal is Ag, Cu, or an alloy containing Ag or Cu as a main component. The short-circuiting element according to claim 34, wherein the inner layer of the first fusible conductor and the second fusible conductive system is a high melting point metal and the outer layer is a low melting point metal coating structure. The short-circuiting element of claim 34, wherein the inner layer of the first fusible conductor and the second fusible conductive system is a low melting point metal and the outer layer is a high melting point metal coating structure. The short-circuiting element according to claim 34, wherein the first meltable conductor and the second meltable conductive system have a laminated structure of a low melting point metal and a high melting point metal layer. The short-circuiting element according to claim 34, wherein the first meltable conductor and the second meltable conductive system have a multilayer structure of four or more layers in which a low melting point metal and a high melting point metal are alternately laminated. The short-circuiting element according to claim 34, wherein the first fusible conductor and the second fusible conductor are provided with an opening portion in a high melting point metal formed on a surface of the low melting point metal constituting the inner layer. The short-circuiting element of claim 34, wherein the first fusible conductor and the second fusible conductor have a high melting point metal layer having a plurality of openings and a low melting point formed on the high melting point metal layer The metal layer is filled with a low melting point metal in the opening. The short-circuiting element of claim 34, wherein among the first fusible conductor and the second fusible conductor, the volume of the low-melting-point metal is higher than the volume of the melting-point metal. A short circuit comprising: a first circuit; a first fuse; and first and second electrodes that are formed adjacent to each other and insulated; and a second circuit that is electrically formed independently of the first circuit and has a heating element and a second fuse connected to one end of the heating element; and the first fuse is melted and the first and second electrodes are short-circuited by heat generated by the heat generating body by applying a current to the second circuit. The second fuse is blown to stop the heat generation of the heat generating body. A short circuit according to claim 43, wherein in the second circuit, the heating element and the second fuse are connected to a power source and a switching element, and the switching element is driven to cause a current to flow.