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WO2013038621A1 - Structure de liaison électrique, équipement électrique comportant celle-ci et procédé de fabrication de structure de liaison électrique - Google Patents

Structure de liaison électrique, équipement électrique comportant celle-ci et procédé de fabrication de structure de liaison électrique Download PDF

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Publication number
WO2013038621A1
WO2013038621A1 PCT/JP2012/005642 JP2012005642W WO2013038621A1 WO 2013038621 A1 WO2013038621 A1 WO 2013038621A1 JP 2012005642 W JP2012005642 W JP 2012005642W WO 2013038621 A1 WO2013038621 A1 WO 2013038621A1
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WIPO (PCT)
Prior art keywords
alloy body
aluminum
connection structure
electrical connection
nickel
Prior art date
Application number
PCT/JP2012/005642
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English (en)
Japanese (ja)
Inventor
近藤　憲司
靖夫 蔭山
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パナソニック株式会社
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Publication of WO2013038621A1 publication Critical patent/WO2013038621A1/fr

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
    • B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
    • B23K35/24—Selection of soldering or welding materials proper
    • B23K35/26—Selection of soldering or welding materials proper with the principal constituent melting at less than 400 degrees C
    • B23K35/262—Sn as the principal constituent
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
    • B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
    • B23K35/24—Selection of soldering or welding materials proper
    • B23K35/28—Selection of soldering or welding materials proper with the principal constituent melting at less than 950 degrees C
    • B23K35/286—Al as the principal constituent
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C21/00—Alloys based on aluminium
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
    • C23C2/04—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor characterised by the coating material
    • C23C2/08—Tin or alloys based thereon
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K2101/00—Articles made by soldering, welding or cutting
    • B23K2101/36—Electric or electronic devices
    • B23K2101/38—Conductors

Definitions

  • the present invention relates to an electrical connection structure part formed by coating a connection part between a first conductor part and a second conductor part with an alloy body mainly composed of tin, an electric device having the electrical connection structure part, and an electrical connection structure part. It relates to a forming method.
  • Patent Document 1 Conventionally, until about 1940, since electric copper was expensive and rare, aluminum electric wires were used for electric wiring, power transmission lines, windings of rotating electrical machines, windings of transformers, and the like (for example, Patent Document 1). , See Patent Document 2).
  • an aluminum wire and a copper wire may be used in combination as part of the electrical wiring, the transmission line, the winding of the rotating electrical machine, and the winding of the transformer (see, for example, Patent Document 3 and Patent Document 4).
  • the standard potential of aluminum is lower than other metals such as copper, copper alloy and tin used for bonding.
  • problems such as electrolytic corrosion due to the standard potential difference occur in the contact of different metals. Therefore, a technique for suppressing corrosion due to electrolytic corrosion resulting from the standard potential difference is also required.
  • the oxide film formed on the surface of aluminum, which is the core of the aluminum wire is removed by using the ultrasonic vibration of an ultrasonic device to form an electrical connection structure.
  • a technique is disclosed (for example, see Patent Document 5).
  • Patent Document 5 since it is necessary to introduce a large facility such as an ultrasonic device, there are problems that the cost increases and the number of work steps increases.
  • the wire diameter of the aluminum electric wire is more likely to be thinner than desired. Therefore, it is necessary to newly take measures against a decrease in physical strength of the aluminum wire itself. For example, it is necessary to finely control the temperature at the time of melting the alloy and the conditions for immersing the aluminum wire in the molten alloy, and to level the quality level of the manufacturing process. As a result, the subject that an increase in cost and work man-hours will generate
  • a special jig is required for crimping because the aluminum wire is crimped using a special terminal. Furthermore, when the terminals are caulked and joined to an electric device with vibration such as a rotating electrical machine, aluminum exhibits a large creep characteristic at a low temperature, so that the joint is loosened with time. And since the contact resistance etc. increase by loosening of the joined part which crimped, there exists a subject that the reliability of an electric equipment falls. In particular, when the aluminum electric wire is a thin wire, there are problems such as a significant decrease in reliability.
  • an electrical connection structure includes a first conductor portion made of aluminum or an aluminum alloy, a second conductor portion, and at least a first conductor portion and a second conductor portion.
  • An alloy body containing at least tin, silver, and nickel that covers and connects the connection portion, and the nickel content of the alloy body is in the range of 0.1 wt% to 0.8 wt%.
  • the electrical equipment of the present invention is connected by the electrical connection structure. Thereby, a highly reliable electric device can be realized.
  • the present invention provides an electrical connection structure in which a connection portion between at least a first conductor portion and a second conductor portion made of aluminum or an aluminum alloy is formed by covering with an alloy body containing at least tin, silver, and nickel.
  • a method for forming a part comprising: a connecting part forming step for connecting a first conductor part and a second conductor part to form a connecting part; a molten alloy body forming step for melting an alloy body; and immersion in the molten alloy body And an alloy body forming step of forming an alloy body at least at the connection portion.
  • the nickel content of the alloy body is in the range of 0.1 wt% to 0.8 wt%.
  • the electrical device of the present invention is an electrical device that is connected by the method for forming the electrical connection structure. Thereby, a highly reliable electric device can be easily manufactured.
  • FIG. 1 is a cross-sectional view illustrating an electrical connection structure according to Embodiment 1 of the present invention.
  • FIG. 2 is a flowchart for explaining a method of forming the electrical connection structure according to the embodiment.
  • FIG. 3 is a diagram showing the relationship between the metal concentration in the molten alloy body and the production amount according to the embodiment.
  • FIG. 4 is a flowchart for explaining a method of forming an electrical connection structure according to the second embodiment of the present invention.
  • FIG. 5 is a diagram showing the relationship between the metal concentration in the molten alloy body and the production amount according to the embodiment.
  • FIG. 1 is a cross-sectional view illustrating an electrical connection structure according to Embodiment 1 of the present invention.
  • the electrical connection structure 10 of the present embodiment includes a first conductor 20 made of aluminum (Al) or an aluminum alloy (Al alloy) and an electrical terminal such as copper (Cu).
  • An alloy body 50 made of at least tin (Sn), silver (Ag), and nickel (Ni) covering the second conductor portion 30 and the connection portion 40 between at least the first conductor portion 20 and the second conductor portion 30. And is composed of.
  • the alloy body 50 contains 0.1 wt% to 0.8 wt%, preferably 0.2 wt% to 0.6 wt% of nickel.
  • the alloy body 50 contains 1% to 5% by weight, preferably 2% to 4% by weight of silver.
  • the 1st conductor part 20 is the aluminum electric wire etc. of electric equipments, such as rotary electric machines, such as a transformer, a reactor, and a motor, an electronic device, and a magnetron, for which low cost and weight reduction are requested
  • the second conductor portion 30 is a wiring pattern made of, for example, copper wiring or aluminum wiring on a circuit board, a nickel-plated terminal pin, or the like, which is connected to the end of the aluminum wire of the first conductor portion 20.
  • the first conductor portion 20 and the second conductor portion 30 are connected via the alloy body 50 mainly composed of tin containing the predetermined content of nickel or silver as described above.
  • the electrical connection structure 10 is configured.
  • the first conductor portion 20 and the second conductor portion 30 are connected by the electrical connection structure portion 10 having high mechanical strength, excellent electrical characteristics, and high reliability such as electric corrosion resistance and impact resistance. be able to.
  • FIG. 2 is a flowchart illustrating a method for forming the electrical connection structure according to the embodiment.
  • an insulating coating of an aluminum wire corresponding to the first conductor portion 20 having an insulating coating extending from a rotating electric machine such as a motor is formed using a rotary blade type peeling machine, for example. Remove by length.
  • a circuit connection portion having an electrical terminal corresponding to the second conductor portion 30 is prepared (step S10).
  • step S20 the electrical terminal corresponding to the second conductor portion 30 of the circuit connecting portion and the first conductor portion 20 are connected and aligned so as to overlap approximately the connecting portion 40 shown in FIG. 1 (step S20). .
  • the alloy body tank is mainly composed of tin, nickel is mixed so as to be contained in a predetermined amount within a range of 0.1 wt% to 0.8 wt% and silver, for example, 1 wt% to 5 wt%.
  • the alloy body 50 is charged and heated to, for example, 400 degrees to melt the alloy body 50, thereby producing a molten alloy body (step S30).
  • step S40 At least the aligned connection portion 40 between the first conductor portion 20 and the second conductor portion 30 is immersed in the molten alloy body for a predetermined time (for example, 2 seconds) (step S40).
  • connection part 40 between the first conductor part 20 and the second conductor part 30 is covered with the alloy body 50 to form the electrical connection structure part 10 (step S50).
  • the electrical connection structure 10 having high mechanical strength, excellent electrical characteristics, and high reliability such as electric corrosion resistance and impact resistance can be connected to the first conductor portion 20 and the second conductor portion 30.
  • the portion 40 can be formed.
  • FIG. 3 is a diagram showing the relationship between the metal concentration in the molten alloy body and the production amount according to the embodiment of the present invention.
  • the line 1 in the figure shows the change in the concentration of nickel (Ni)
  • the line 2 shows the change in the concentration of aluminum (Al).
  • line 3 in the figure indicates the production limit, which is the limit for forming the electrical connection structure. Below, the factor which the production limit of an electrical connection structure part generate
  • the concentration of nickel in the molten alloy body mainly composed of tin is 0.1% by weight or more, preferably 0.2% by weight or more
  • a composite of Al / Ag / Ni is formed on the aluminum surface of the aluminum electric wire. Formation of intermetallic compounds is promoted. Thereby, the penetration of aluminum into the molten alloy body is prevented, and a decrease in nickel concentration can be suppressed. In other words, if the nickel concentration is maintained in the region of 0.1% by weight or more, the production amount can be increased.
  • the nickel concentration and the residual wire diameter of the aluminum electric wire were evaluated by the following methods.
  • alloy bodies each containing nickel (Ni) at a concentration of 0 wt% to 0.6 wt% in an alloy body containing tin (Sn) containing 3.5 wt% silver (Ag) as a main component are each 400 wt%.
  • Each molten alloy body tank in which the alloy body was melted by heating at ° C. was prepared.
  • the insulating coating was peeled off from the aluminum electric wire having a wire diameter of ⁇ 0.4 mm using a rotary blade type peeling machine. Thereafter, a flux was applied to the peeled aluminum electric wire, and the aluminum electric wire was immersed in the molten alloy body tank. At this time, the aluminum electric wire was immersed in the molten alloy body for 2 seconds. Thereafter, the diameter of the aluminum core wire of the aluminum electric wire was measured.
  • the nickel concentration in the molten alloy body 0.1% by weight or more, preferably 0.2% by weight or more, the elution of aluminum from the aluminum electric wire can be prevented, and the thinning of the wire diameter can be prevented. I understand that I can do it.
  • connection portion of the electrical connection structure portion to be joined to the second conductor portion via the alloy body Strength can be secured. As a result, it is possible to realize a highly reliable electrical connection structure and an electrical device joined thereby.
  • the aluminum alloy can contain a predetermined amount of nickel, thereby preventing the aluminum electric wire from being thinned and suppressing the corrosion resistance.
  • the nickel concentration and the electric corrosion resistance of the aluminum wire were evaluated under the following conditions.
  • alloy bodies containing nickel in a concentration of 0 to 0.8 wt% in an alloy body containing tin containing 3.5 wt% silver (Ag) as a main component are heated at 400 ° C., respectively.
  • Each molten alloy body tank in which the body was melted was prepared.
  • the terminal which gave the tin plating was immersed in each molten alloy body tank, and the alloy body which has tin which has a different nickel concentration as a main component was made to adhere to the terminal. Thereafter, the terminal with the alloy body adhered in water containing chlorine ions was left.
  • the time until the alloy body which has tin as a main component peels from a terminal was measured, and the electric corrosion resistance was evaluated. At this time, the electric corrosion resistance was evaluated based on the time (1 time) until peeling when the nickel concentration was 0% by weight.
  • the nickel concentration in the molten alloy body to 0.1% by weight or more, preferably 0.2% by weight or more, it is possible to impart higher electric corrosion resistance than the electrical connection structure portion by the alloy body not containing nickel. Recognize.
  • an alloy body containing nickel in a concentration of 0% by weight to 1.0% by weight in an alloy body mainly composed of tin containing 3.5% by weight silver (Ag) was prepared. Then, each alloy body was heated, and the liquidus temperature at which the alloy body melted was measured and evaluated.
  • the temperature of the molten alloy body tank and / or the molten alloy body is preferably set to 320 ° C. or higher.
  • the liquidus temperature of the alloy body exceeds 420 ° C. Therefore, it is necessary to set the temperature of the molten alloy body tank and / or the molten alloy body to a temperature exceeding 420 ° C.
  • tin in the alloy body is oxidized, and the amount of tin oxide generated increases dramatically. Therefore, since the tin in a molten alloy body is consumed, loss cost arises. Further, an extra electric power is required to raise the temperature of the molten alloy body tank and / or the molten alloy body.
  • the temperature of the molten alloy body tank and / or the molten alloy body is adjusted from 320 ° C. to 420 ° C. in consideration of the nickel concentration in the alloy body and the predetermined viscosity necessary for wettability.
  • the electrical connection structure is formed.
  • the molten alloy body temperature and the residual wire diameter of the aluminum electric wire were evaluated by the following methods.
  • an alloy body containing 0.2 wt% nickel in an alloy body containing tin containing 3.5 wt% silver (Ag) as a main component was heated at 400 ° C., 420 ° C. and 440 ° C.
  • Each molten alloy body tank in which the alloy body was melted was prepared.
  • the insulating coating was peeled off from the aluminum electric wire having a wire diameter of ⁇ 0.4 mm using a rotary blade type peeling machine. Thereafter, a flux was applied to the peeled aluminum electric wire, and the aluminum electric wire was immersed in each molten alloy body tank. At this time, the aluminum electric wire was immersed in the molten alloy body for 2 seconds. Thereafter, the diameter of the aluminum core wire of the aluminum electric wire was measured.
  • the temperature of the molten alloy body tank and / or the molten alloy body is 420 ° C. in consideration of the residual wire diameter of the aluminum electric wire, the prevention of tin oxide generation described in (Table 3), loss cost, and extra power consumption. The following is preferable.
  • the nickel concentration (content) contained in the alloy is the residual wire diameter of the aluminum electric wire, the electric corrosion resistance, and the liquid during the formation of the alloy body. Considering the phase temperature, 0.1 to 0.8% by weight is preferable. Furthermore, the nickel concentration (content) contained in the alloy is particularly preferably 0.2 to 0.6% by weight.
  • the silver concentration of the molten alloy body and the characteristics of the alloy body constituting the electrical connection structure will be described with reference to (Table 5). Specifically, the characteristics of the alloy body were evaluated from the viewpoint of the strength and thermal shock resistance of the alloy body with respect to the silver concentration.
  • alloy bodies containing 0.4 wt% nickel (Ni) -containing tin as a main component and silver (Ag) at a concentration of 0 wt% to 6 wt% are heated at 400 ° C., respectively.
  • each molten alloy body tank in which the alloy body was melted was prepared.
  • the connection portion between the first conductor portion and the second conductor portion made of an aluminum wire having a wire diameter of ⁇ 0.4 mm is immersed in each molten alloy body tank for 2 seconds to form an alloy body, and the electrical connection structure portion Formed.
  • the strength of the electrical connection structure portion was evaluated according to JIS Z2241, which is a general evaluation method, and the impact resistance was evaluated according to JIS Z2242.
  • the silver content (concentration) of the alloy body is preferably 1% by weight to 5% by weight. In consideration of nickel content (concentration) and the like, 2 to 4% by weight is particularly preferable. . Furthermore, considering the increase in the silver content (concentration) of the alloy body and the improvement of the strength of the electrical connection structure and the reduction in impact resistance, the variation in content during the formation of the alloy body (+/ ⁇ 0.2 wt%), the silver content (concentration) of the alloy is most preferably 3.5 wt%.
  • the eutectic point is a silver concentration of 3.5% by weight with respect to tin in the alloy body, so that the balance of properties with respect to strength and thermal shock resistance is most excellent.
  • the silver concentration is around 3.5% by weight with respect to tin in the alloy body and the silver concentration is from 2% by weight to 4% by weight, a sufficiently excellent characteristic balance can be obtained with respect to strength and thermal shock resistance. is there.
  • FIG. 4 is a flowchart for explaining a method of forming an electrical connection structure according to the second embodiment of the present invention.
  • the method for forming an electrical connection structure according to the present embodiment further includes a step of controlling the nickel content (concentration) in the molten alloy body in the range of 0.1 wt% to 0.8 wt%. It differs from the method for forming the electrical connection structure according to the first embodiment in that it is provided.
  • an insulating film of an aluminum wire corresponding to the first conductor portion 20 having an insulating film extending from a rotating electric machine such as a motor is formed using a rotary blade type peeling machine, for example. Remove by length.
  • a circuit connection portion having an electrical terminal corresponding to the second conductor portion 30 is prepared (step S10).
  • step S20 the electrical terminal corresponding to the second conductor portion 30 of the circuit connecting portion and the first conductor portion 20 are connected and aligned so as to overlap approximately the connecting portion 40 shown in FIG. 1 (step S20). .
  • the alloy body tank is mainly composed of tin, nickel is mixed so as to be contained in a predetermined amount within a range of 0.1 wt% to 0.8 wt% and silver, for example, 1 wt% to 5 wt%. Then, the alloy body 50 is charged and heated to, for example, 400 degrees to melt the alloy body 50, thereby producing a molten alloy body (step S30).
  • step S40 whether or not the nickel content (concentration) in the molten alloy body is 0.1% by weight or more is measured using, for example, a fluorescent X-ray analyzer.
  • step S40 when nickel content (concentration) is 0.1 weight% or more (No of step S40), whether nickel content (concentration) in a molten alloy body is 0.8 weight% or less, for example, measurement is performed using a fluorescent X-ray analyzer or the like (step S60).
  • step S60 when the nickel content (concentration) is 0.8% by weight or less (No in step S60), the aligned connection portion 40 of at least the first conductor portion 20 and the second conductor portion 30 is melted. It is immersed in the alloy body for a predetermined time (for example, 2 seconds) (step S80).
  • connection part 40 between the first conductor part 20 and the second conductor part 30 is covered with the alloy body 50 to form the electrical connection structure part 10 (step S90).
  • step S40 when the nickel content (concentration) is less than 0.1% by weight (Yes in step S40), for example, a nickel plate or a nickel rod is introduced into the molten alloy body and melted to obtain the nickel content. (Concentration) is set to 0.1% by weight or more.
  • step S60 when the nickel content (concentration) exceeds 0.8% by weight (Yes in step S60), for example, a tin plate or a tin bar is introduced into the molten alloy body and melted, and the nickel content is increased.
  • the content (concentration) is 0.8% by weight or less.
  • FIG. 5 is a diagram showing the relationship between the metal concentration in the molten alloy body and the production amount according to the embodiment.
  • the line 5 in the figure shows the change in the concentration of nickel (Ni), and the line 4 shows the change in the concentration of aluminum (Al).
  • the alloy body when the initial nickel concentration after melting the alloy body is 0.8% by weight, the alloy body is connected to the connection portion between the first conductor portion of the electrical equipment and the second conductor portion such as a circuit board. As the electrical connection structure portion 10 is formed by forming, the nickel concentration in the molten alloy body decreases.
  • the nickel concentration in the molten alloy body is reduced to 0.1% by weight.
  • a nickel plate or the like is introduced and replenished. This increases the nickel concentration in the molten alloy body.
  • the nickel concentration in the molten alloy body is analyzed again. If the nickel concentration exceeds 0.8% by weight, for example, a tin plate is introduced into the molten alloy.
  • connection structure can be continuously produced.
  • the present embodiment for example, even if the production amount increases, the elution of aluminum from the aluminum electric wire can be suppressed, and the formation of aluminum oxide on the surface of the molten alloy body in contact with the atmosphere can be suppressed. Therefore, manufacture of the electrical connection structure part by the aluminum wire and the alloy body which has tin as a main component can be performed stably over a long period of time.
  • the nickel concentration in the molten alloy body can be managed from 0.1% by weight to 0.8% by weight, the wettability of the molten alloy body with respect to the aluminum electric wire is kept good. Can do.
  • the electrical connection structure portion having high electrical corrosion resistance and excellent reliability, and An electrical device equipped with it can be realized.
  • the nickel concentration is controlled in the range of 0.1 wt% to 0.8 wt%, but the present invention is not limited to this.
  • the nickel concentration may be controlled in the range of 0.2 wt% to 0.6 wt%.
  • the nickel concentration is within the range of 0.1 wt% to 0.8 wt%, it can be controlled within an arbitrary range.
  • the silver concentration may be controlled in the range of 1% by weight to 5% by weight. Furthermore, if the silver concentration is within the range of 1% by weight to 5% by weight, it can be controlled within an arbitrary range.
  • the electrical connection structure part of the present invention is not limited to the above-described embodiments, and are within the scope not departing from the gist of the present invention. Needless to say, various changes can be made.
  • the first conductor portion has been described by taking aluminum as an example, but the present invention is not limited to this.
  • the same effect can be obtained even when an aluminum alloy is used.
  • a trace amount of impurities usually contained in aluminum or aluminum alloy may be contained.
  • aluminum, aluminum alloys, and electrical aluminum ingots for producing these may contain inevitable impurities such as Si, Fe, Cu, Ti, V, Mn, Mg, Cr, Zn. Needless to say.
  • the alloy body may intentionally contain other elements other than the inevitable impurities and / or the inevitable impurities as long as the actions and effects of the present invention are not impaired.
  • an electric device having a plate-like aluminum electric wire as at least the first conductor portion has been described as an example, but the present invention is not limited to this.
  • an electric device for example, an electric device, an electronic device, and a rotating electric machine using an aluminum electric wire such as a stranded wire may be used.
  • the electrical connection structure is formed by the following method.
  • the insulating coating on the end of the aluminum wire is removed. And the edge part of an aluminum electric wire is wound around terminal parts etc. which consist of pins etc., such as a circuit connection part, and a connection part is formed. Then, flux etc. are apply
  • an alloy body is formed at least at a connection portion between the end portion of the aluminum electric wire and a terminal portion such as a circuit connection portion, and an electrically connected electrical connection structure portion is formed.
  • an electronic device having a configuration in which a connection electrode portion made of a copper wiring pattern of a circuit wiring portion of a printed circuit (printed wiring board or the like) is replaced with aluminum or an aluminum alloy may be used.
  • the electrical connection structure is formed by the following method.
  • connection terminals of electronic components, electrical components, and semiconductor components are arranged on the connection electrode portion (connection round portion) of the circuit wiring portion. And a flux etc. are apply
  • the electronic device may be a transformer or a reactor, and the same effect can be obtained.
  • the electrical connection structure portion of the present invention includes a first conductor portion made of aluminum or an aluminum alloy, a second conductor portion, and a connection between at least the first conductor portion and the second conductor portion.
  • an alloy body containing at least tin, silver, and nickel, covering and connecting the parts, and the nickel content of the alloy body is in the range of 0.1 wt% to 0.8 wt%.
  • the second conductor is made of aluminum, an aluminum alloy, or a metal material.
  • the versatility of the electrical connection structure can be improved.
  • the nickel content of the alloy body is in the range of 0.2 wt% to 0.6 wt%.
  • the silver content of the alloy body is in the range of 1% to 5% by weight.
  • the silver content of the alloy body is in the range of 2% to 4% by weight.
  • the electrical device of the present invention is connected by the electrical connection structure. Thereby, a highly reliable electric device can be realized.
  • the present invention relates to an electrical connection structure portion formed by covering a connection portion between a first conductor portion made of aluminum or an aluminum alloy and a second conductor portion with an alloy body containing at least tin, silver, and nickel.
  • a forming method comprising: a connecting portion forming step for connecting a first conductor portion and a second conductor portion to form a connecting portion; a molten alloy body forming step for melting an alloy body; and immersion in a molten alloy body.
  • the nickel content of the alloy body is in the range of 0.1 wt% to 0.8 wt%.
  • the second conductor is made of aluminum, an aluminum alloy, or a metal material.
  • the electrical connection structure part excellent in versatility can be formed.
  • the nickel content of the alloy body is in the range of 0.2 wt% to 0.6 wt%.
  • the silver content of the alloy body is in the range of 1 to 5% by weight.
  • the silver content of the alloy body is in the range of 2 wt% to 4 wt%.
  • the method for forming an electrical connection structure according to the present invention further includes a replenishment step of replenishing the molten alloy body with nickel. As a result, a stable electrical connection structure can be formed over a long period of time.
  • the electrical device of the present invention is an electrical device that is connected by the method for forming the electrical connection structure. Thereby, a highly reliable electric device can be easily manufactured.
  • the present invention is useful in a technical field such as an electric device provided with a conductor portion made of aluminum wire or aluminum or an aluminum alloy that is required to be reduced in weight at a low cost, particularly a rotating electric machine such as a motor having a large vibration.

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Abstract

La présente invention porte sur une structure de liaison électrique comprenant : une première partie conductrice constituée d'aluminium ou d'un alliage d'aluminium ; une seconde partie conductrice ; et un corps d'alliage qui comprend au moins de l'étain, de l'argent et di nickel et qui recouvre et relie au moins les parties reliées de la première partie conductrice et de la seconde partie conductrice. Selon la présente invention, la teneur en nickel de l'alliage susmentionné se situe dans la plage de 0,1-0,8 % en poids. Par conséquent, il est possible de fournir une structure de liaison électrique hautement fiable qui présente une excellente résistance vis-à-vis de la corrosion électrolytique et un faible amincissement de fil dans la première partie conductrice, et de fournir un équipement électrique équipé de ladite structure.
PCT/JP2012/005642 2011-09-12 2012-09-06 Structure de liaison électrique, équipement électrique comportant celle-ci et procédé de fabrication de structure de liaison électrique WO2013038621A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2011-197966 2011-09-12
JP2011197966 2011-09-12

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WO2013038621A1 true WO2013038621A1 (fr) 2013-03-21

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CN104070297A (zh) * 2013-03-25 2014-10-01 株式会社日立制作所 焊料、铝电线体以及采用铝电线体的马达

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JP2004232014A (ja) * 2003-01-30 2004-08-19 Dowa Mining Co Ltd Ｓｎ被覆を施した銅または銅合金部材およびその製造方法
JP2009142096A (ja) * 2007-12-07 2009-06-25 Panasonic Corp モータの製造方法
JP2009148053A (ja) * 2007-12-13 2009-07-02 Panasonic Corp 絶縁被膜被覆電線の絶縁被膜剥離器、および、はんだ付け方法

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JPS5085541A (fr) * 1973-12-05 1975-07-10
JPH09232322A (ja) * 1996-02-27 1997-09-05 Tanaka Denshi Kogyo Kk 半田合金ワイヤ及びその製造方法
JP2004232014A (ja) * 2003-01-30 2004-08-19 Dowa Mining Co Ltd Ｓｎ被覆を施した銅または銅合金部材およびその製造方法
JP2009142096A (ja) * 2007-12-07 2009-06-25 Panasonic Corp モータの製造方法
JP2009148053A (ja) * 2007-12-13 2009-07-02 Panasonic Corp 絶縁被膜被覆電線の絶縁被膜剥離器、および、はんだ付け方法

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104070297A (zh) * 2013-03-25 2014-10-01 株式会社日立制作所 焊料、铝电线体以及采用铝电线体的马达
US9789568B2 (en) 2013-03-25 2017-10-17 Hitachi, Ltd. Solder, aluminum wire body and motor using the same

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