WO2020137267A1 - Borne - Google Patents

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Publication number
WO2020137267A1
WO2020137267A1 PCT/JP2019/045312 JP2019045312W WO2020137267A1 WO 2020137267 A1 WO2020137267 A1 WO 2020137267A1 JP 2019045312 W JP2019045312 W JP 2019045312W WO 2020137267 A1 WO2020137267 A1 WO 2020137267A1
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WO
WIPO (PCT)
Prior art keywords
metal
terminal
columnar
metal wire
wire
Prior art date
Application number
PCT/JP2019/045312
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English (en)
Japanese (ja)
Inventor
鈴木　雅教
康仁 塩谷
人志 田谷
宗忠 佐藤
信 佐藤
佐名川　佳治
Original Assignee
パナソニックＩｐマネジメント株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Application filed by パナソニックＩｐマネジメント株式会社 filed Critical パナソニックＩｐマネジメント株式会社
Priority to JP2020562925A priority Critical patent/JP7016022B2/ja
Publication of WO2020137267A1 publication Critical patent/WO2020137267A1/fr

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/28—Coils; Windings; Conductive connections
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
    • H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
    • H01F41/04—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets for manufacturing coils
    • H01F41/10—Connecting leads to windings
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F5/00—Coils
    • H01F5/04—Arrangements of electric connections to coils, e.g. leads
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
    • H01R4/02—Soldered or welded connections
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
    • H01R4/10—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation effected solely by twisting, wrapping, bending, crimping, or other permanent deformation
    • H01R4/14—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation effected solely by twisting, wrapping, bending, crimping, or other permanent deformation by wrapping
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
    • H01R4/58—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation characterised by the form or material of the contacting members
    • H01R4/62—Connections between conductors of different materials; Connections between or with aluminium or steel-core aluminium conductors
    • 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
    • B23K11/00—Resistance welding; Severing by resistance heating

Definitions

  • the present disclosure relates to terminals.
  • Patent Document 1 discloses a terminal (columnar metal terminal) connected to a coil terminal (metal wire) by winding the coil terminal (metal wire).
  • the metal wire when the metal wire is wound around the pillar-shaped metal terminal, if the adhesion between the metal wire and the pillar-shaped metal terminal is low, the bonding strength between the metal wire and the pillar-shaped metal terminal may be reduced.
  • the present disclosure improves the workability when winding a metal wire around a pillar-shaped metal terminal, thereby improving the adhesion between the metal wire and the pillar-shaped metal terminal during winding and ensuring the bonding strength between the two.
  • the purpose is to provide a terminal that can.
  • a terminal includes a columnar metal terminal and a metal wire wound around the columnar metal terminal, and the melting point of the first metal forming the metal wire is The melting point of the second metal forming the columnar metal terminal is lower than the melting point, and an intermetallic compound layer of the first metal and the second metal is provided at the interface between the metal wire and the columnar metal terminal.
  • FIG. 1 is a schematic diagram showing a terminal according to an embodiment.
  • FIG. 2 is a cross-sectional view showing the terminal according to the embodiment.
  • FIG. 3 is an explanatory view showing a state in which a metal wire is entangled with a columnar metal terminal according to the embodiment.
  • FIG. 4 is a flow chart showing a step of tying a metal wire around a columnar metal terminal according to the embodiment.
  • FIG. 5 is a diagram showing a process of producing an assembly, thermocompression bonding, and bonding according to the embodiment.
  • FIG. 6 is a flow chart showing a process of joining a metal wire to a columnar metal terminal of an assembly according to the embodiment.
  • FIG. 7 is explanatory drawing which illustrated the conduction path at the time of resistance welding which concerns on embodiment.
  • FIG. 8 is an enlarged image showing the intermetallic compound layer of the terminal and its periphery according to the embodiment.
  • FIG. 9 is a graph showing the relationship between the ratio of the crack length to the interface length and the thickness of the intermetallic compound in the terminal according to the embodiment.
  • FIG. 10 is a sectional view showing a terminal according to the first modification. 11: is sectional drawing which shows the terminal which concerns on the modification 2.
  • FIG. 12 is a cross-sectional view showing a terminal according to Modification 3.
  • FIG. 13 is a front view showing a schematic configuration of a terminal according to Modification 4.
  • FIG. 14 is a cross-sectional view showing a terminal according to Modification 4 in which a plurality of metal wires having different wire diameters are metal-bonded to each other.
  • each diagram is a schematic diagram, and is not necessarily an exact illustration. Further, in each of the drawings, the substantially same components are designated by the same reference numerals, and overlapping description will be omitted or simplified.
  • FIG. 1 is a schematic diagram showing a terminal 1 according to the embodiment.
  • the terminal 1 is provided for a stator 100 that is a part of the motor.
  • the terminal 1 is provided on the plurality of coils 101 that form the stator 100.
  • the terminal 1 supplies power to the coil 101 from a circuit board mounted on a power supply unit that supplies power to the motor.
  • the terminal 1 includes a columnar metal terminal 10 and a metal wire 20.
  • FIG. 2 is a sectional view showing the terminal 1 according to the embodiment. Specifically, FIG. 2 is a cross-sectional view of a section including the line II-II in FIG.
  • the columnar metal terminal 10 is a columnar metal member electrically connected to the coil 101.
  • the columnar metal terminal 10 is electrically connected to the metal wire 21 which is a part of the metal wire 20. Specifically, the columnar metal terminal 10 is joined to the metal wire 21 in a state where the metal wire 21 is wound.
  • the columnar metal terminal 10 is, for example, a member in which a base material layer 11 containing iron (Fe) as a main component is coated with a plating layer 12 made of a second metal containing copper (Cu) as a main component.
  • the metal wire 21 and the columnar metal terminal 10 are joined in a state where the metal wire 21 is entwined with the columnar metal terminal 10.
  • to be entangled means that the wire is wound around the object, and the metal wires 21 are overlapped with each other (intersection 23: FIG. 3). (See) exists.
  • the metal wire 21 is wound around the pillar-shaped metal terminal 10 in a single layer except for the intersecting portion 23.
  • Metal joining is, for example, a joining method capable of forming an intermetallic compound layer formed by joining objects at the interface between joining objects.
  • Metal bonding includes thermocompression bonding, ultrasonic bonding, diffusion bonding, resistance welding and the like.
  • resistance welding is also suitable as compared with other joining methods for joining the metal wire 21 to the columnar metal terminal 10.
  • the base material layer 11 is, for example, a rectangle having a short side of about 0.4 mm and a long side of 0.6 mm as viewed in the axial direction, and the plating layer 12 has a thickness of about 25 ⁇ m. Further, in the metal wire 20, the wire diameter of the metal wire 21 is about 0.15 mm.
  • the columnar metal terminal 10 is a quadrangle when viewed in the axial direction.
  • the columnar metal terminal 10 is not limited to a quadrangle when viewed in the axial direction, and may have a polygonal shape other than a quadrangle, a circular shape, an elliptical shape, an oval shape, or the like.
  • the columnar metal terminal 10 has a rectangular cross section in a direction orthogonal to the axial direction of the columnar metal terminal 10, and has a pair of long side surfaces and a pair of short side surfaces.
  • the long side surface is a surface whose cross section constitutes the long side of a rectangle
  • the short side surface is a surface whose cross section constitutes the short side of a rectangle.
  • the long side surface of the columnar metal terminal 10 is a joining terminal surface 110 to which the metal wire 21 is joined by metal.
  • the cross section of the columnar metal terminal 10 in the direction orthogonal to the axial direction may have a shape in which long sides and short sides are not distinguished, that is, a square. In this case, the pair of side surfaces facing each other in the columnar metal terminal can be used as the bonding terminal surface.
  • the metal wire 21 constitutes a part of the metal wire 20 and is a metal wire material. Specifically, the metal wire 21 is made of a first metal whose main component is aluminum (Al). The metal wire 21 forms an intersection 23 where the metal wires 21 overlap each other in the circumferential direction of the columnar metal terminal 10. The intersecting portion 23 is formed so as to come into contact with one of the short side surfaces.
  • An intermetallic compound layer 24 formed by metal joining is formed at the interface between the joining terminal surface 110 of the columnar metal terminal 10 and the metal wire 21.
  • the intermetallic compound layer 24 is made of an alloy of a second metal forming the plated layer 12 and a first metal forming the metal wire 21. Specifically, the intermetallic compound layer 24 is formed by the first metal and the second metal being temporarily mixed by resistance welding and then re-cured.
  • the thickness (layer thickness) of the intermetallic compound layer 24 is preferably 5 ⁇ m or less.
  • the columnar metal terminal 10 is a rectangular columnar shape that is rectangular in the axial direction, and a pair of long side faces of the side faces thereof are the joint terminal faces 110. Further, on the joint terminal surface 110, the intersection 23 of the metal wire 21 is not arranged, but the intersection 23 is arranged only on the pair of short side surfaces of the columnar metal terminal 10.
  • the columnar metal terminal 10 is, for example, a member in which the base material layer 11 is covered with the plating layer 12, and the intermetallic compound layer 24 is not formed before the joining.
  • the plating layer 12 is formed of the second metal containing copper as a main component, it has a melting point according to the melting point of copper (1083° C.).
  • a resin layer 22 made of an insulating resin is coated on the metal wire 21.
  • the metal wire 20 is, for example, an enamel wire, a lead wire, or the like.
  • the metal wire 21 is made of, for example, a first metal whose main component is aluminum.
  • the resin layer 22 is made of a resin material such as urethane, polyester, polyester imide, or polyamide imide. Further, as described above, since the metal wire 21 is formed of the first metal containing aluminum as a main component, the metal wire 21 has a melting point according to the melting point of aluminum (660° C.).
  • FIG. 3 is an explanatory view showing a state in which the metal wire 20 is entangled with the columnar metal terminal 10 according to the embodiment.
  • FIG. 3A shows a state in which the metal wire 20 is entwined with the columnar metal terminal 10 as seen from a direction orthogonal to the axial direction of the columnar metal terminal 10.
  • FIG. 3B shows a state in which the metal wire 20 is entangled with the columnar metal terminal 10 as viewed in the axial direction of the columnar metal terminal 10.
  • FIG. 4 is a flow chart showing a step of entwining the metal wire 20 with the columnar metal terminal 10 according to the embodiment.
  • the columnar metal terminal 10 is fixed to a jig (not shown). As a result, the columnar metal terminal 10 is brought into a state in which the metal wire 20 can be wound (S111). Then, the metal wire 20 is wound around the columnar metal terminal 10 while receiving a constant tension.
  • the metal wire 21 of the metal wire 20 is formed of the first metal whose main component is aluminum.
  • the melting point of the first metal is lower than the melting point of the second metal forming the plating layer 12. Specifically, the melting point of the first metal is lower than the melting point of the second metal by 300° C. or more. That is, when the environment temperature is the same, the metal wire 21 is more flexible than the plating layer 12.
  • the metal wire 20 is generally softer than the plated layer 12. At the time of winding, since the relatively soft metal wire 20 is wound around the plating layer 12 having a relatively high hardness, the metal wire 20 can be easily attached to the plating layer 12.
  • the metal wire 20 is wound in the first turn and the second turn, the metal wire 20 is wound around the columnar metal terminal 10 so as to overlap the winding start point of the metal wire 20.
  • the intersection portion 23 where the metal wires 20 intersect each other is formed (S112).
  • the intersecting portion 23 is arranged so as to be in contact with any of the short side surfaces while avoiding the joining terminal surface 110 of the columnar metal terminal 10.
  • the metal wire 20 is wound around the columnar metal terminal 10 for several turns (S113).
  • the metal wire 20 is wound around the columnar metal terminal 10 so as to have a substantially coil shape except for the intersecting portion 23. After that, unnecessary parts of the metal wire 20 are cut with a nipper or the like, and the metal wire 20 is arranged, whereby the assembly 200 shown in FIG. 5 is obtained.
  • FIG. 5 is a diagram showing steps of producing the assembly 200, thermocompression bonding, and joining according to the embodiment.
  • the metal wire 20 is joined to the columnar metal terminal 10.
  • the metal wire 20 is realized by performing thermocompression bonding and resistance welding on the columnar metal terminal 10.
  • FIG. 6 is a flow chart showing a process of joining the metal wire 20 to the columnar metal terminal 10 of the assembly 200 according to the embodiment.
  • the above-described assembly 200 is arranged between the pair of welding electrodes 30 provided in the resistance welding machine (S121). Specifically, the assembly 200 is arranged between the pair of welding electrodes 30 so that the pair of joining terminal surfaces 110 a of the columnar metal terminals 10 and the pair of welding electrodes 30 face each other one-on-one.
  • the assembly is thermocompression bonded by the pair of welding electrodes 30 (S122).
  • the resistance welding machine causes a current as indicated by an arrow Y1 in FIG. 5 to flow through the pair of welding electrodes 30.
  • the resistance welding machine clamps the metal wire 21 between the pair of welding electrodes 30 and applies a load so that the metal wire 21 is crushed.
  • the pair of welding electrodes 30 generate heat to heat the metal wire 20, so that the resin layer 22 of the metal wire 20 is melted and separated from the metal wire 21 of the metal wire 20 and removed.
  • the pair of welding electrodes 30 pushes the metal wire 21 by a predetermined push amount.
  • the metal wire 21 and the columnar metal terminal 10 are pressure-bonded by the pair of welding electrodes 30, the metal wire 21 and the columnar metal terminal 10 are in contact with each other.
  • the resistance welding machine causes a current to flow through the pair of welding electrodes 30 as indicated by an arrow Y2 in FIG. 5 to cause the electric resistance between the columnar metal terminal 10 and the metal wire 21. Joule heat is generated in the columnar metal terminal 10. As a result, the metal wire 21 is melted, and the metal wire 21 is resistance-welded to the columnar metal terminal 10 (S123).
  • the resistance welding machine releases the load applied to the assembly by the pair of welding electrodes 30.
  • the terminal 1 in which the metal wire 21 is electrically connected to the columnar metal terminal 10 can be obtained.
  • the resistance welding machine pushes the metal wire 21 in a direction in which the pair of welding electrodes 30 approach each other. Specifically, the resistance welding machine pushes the metal wire 20 by applying a load to the metal wire 20 with a pair of welding electrodes 30 with a load equal to or larger than a specified load calculated using the diameter, the number of turns, and the proof stress of the metal wire 20. , Transform.
  • the height of the metal wire 20 from the columnar metal terminal 10 is the position where the pushing amount of the metal wire 20 is subtracted from the diameter of the metal wire 20.
  • a contact between the metal wire 21 and the pair of welding electrodes 30 is detected using a load cell.
  • the resistance welding machine can push in the metal wire 21 with the pushing amount from the point of contact with the metal wire 21.
  • the metal wire 21 When the metal wire 21 is pushed into the welding electrode 30 on one side by a predetermined pushing amount, it deforms according to the pushing amount. In this way, the surface of the metal wire 21 on the outer peripheral side of the terminal 1 is flattened, the metal wire 21 wound several turns and the plurality of contact surfaces of the welding electrode 30 are evenly contacted with each other, and the current is supplied through all the contact surfaces. It will be possible.
  • the parallelism between the welding electrode 30 and the assembly 200 can be secured by winding the metal wire 21 around the columnar metal terminal 10 for a plurality of turns. Further, it becomes possible to disperse the load applied to each metal wire 21. By dispersing the load applied to the metal wire 21, the deformation amount of the metal wire 21 becomes insensitive to the load. If it is insensitive to the load, it is difficult to be deformed even with a large load, so that the load during thermocompression bonding and resistance welding can be easily controlled. That is, it becomes easy to control the deformation amount of the metal wire at the time of thermocompression bonding and resistance welding by the load.
  • step S123 of FIG. 6 Next, the joining in step S123 of FIG. 6 will be specifically described.
  • the resistance welding machine controls the current flowing through the pair of welding electrodes 30 so that the metal wire 21 does not suffer from a defect such as disconnection or melting.
  • FIG. 7 is explanatory drawing which illustrated the conduction path at the time of resistance welding which concerns on embodiment.
  • FIG. 7 is an axial view of the assembly 200.
  • a path through which a current flows linearly from one welding electrode 30 to the other welding electrode 30 through the assembly 200 is defined as a conduction path D1, and from one welding electrode 30 to the other welding electrode 30.
  • the paths of the current flowing around the columnar metal terminal 10 and flowing through the metal wire 21 are referred to as conduction paths D2 and D3.
  • the plating layer 12 and the metal wire 21 of the columnar metal terminal 10 are locally melted at the contact surface between the metal wire 21 and the columnar metal terminal 10.
  • aluminum, which is the main component of the metal wire 21, and copper, which is the main component of the plating layer 12 are mixed.
  • an intermetallic compound layer 24 of aluminum and copper is formed at the interface between the metal wire 21 and the columnar metal terminal 10 (see FIG. 2).
  • the terminal 1 includes the columnar metal terminal 10 and the metal wire 20 wound around the columnar metal terminal 10, and the melting point of the first metal forming the metal wire 20 is The melting point of the second metal forming the columnar metal terminal 10 is lower than the melting point of the second metal, and an intermetallic compound layer 24 of the first metal and the second metal is provided at the interface between the metal wire 20 and the columnar metal terminal 10. ..
  • the metal wire 20 is formed into the columnar metal under the same environmental temperature. It is more flexible than the terminal 10.
  • the relatively soft metal wire 20 is wound around the columnar metal terminal 10 having a relatively high hardness, workability when winding the metal wire 20 around the columnar metal terminal 10 can be improved. it can.
  • the metal wire 20 can be easily attached to the columnar metal terminal 10. If the adhesion between the metal wire 20 and the columnar metal terminal 10 is high, thermocompression bonding and resistance welding can be stably performed, and as a result, the bonding strength between the metal wire 20 and the columnar metal terminal 10 should be ensured. You can
  • the melting point of the first metal is lower than the melting point of the second metal by 300 degrees or more.
  • the metal wire 20 is more flexible than the columnar metal terminal 10 under the same environmental temperature. Can be Therefore, workability at the time of winding can be further improved.
  • the main component of the first metal is aluminum and the main component of the second metal is copper.
  • aluminum and copper are generally metals with low electric resistance.
  • Metals having low electric resistance are insensitive to current during resistance welding and can be said to be metals that are difficult to weld. Since a metal having a high electric resistance is sensitive to the current during resistance welding, it melts instantly when a constant current is applied. On the other hand, if the current is insensitive to resistance welding, even a large current is less likely to melt, so that the current value during resistance welding can be easily controlled. That is, it becomes easy to control the molten state of the first metal and the second metal during resistance welding by the current value.
  • the columnar metal terminal 10 and the metal wire 20 can be formed with relatively inexpensive aluminum and copper. Therefore, the manufacturing cost can be suppressed.
  • the thickness of the intermetallic compound layer 24 is 5 ⁇ m or less.
  • FIG. 8 is an enlarged image showing the intermetallic compound layer 24 of the terminal 1 and its periphery according to the embodiment. Specifically, FIG. 8 shows a region surrounded by a broken line L1 in FIG. In FIG. 8, the base material layer 11, the plating layer 12, the intermetallic compound layer 24, and the metal wire 21 of the columnar metal terminal 10 are arranged in this order from the bottom. As shown in FIG. 8, a crack C may occur in the intermetallic compound layer 24. The crack C extends in the intermetallic compound layer 24 along the axial direction of the columnar metal terminal 10.
  • the length of the intermetallic compound layer 24 in the axial direction of the columnar metal terminal 10 is the interface length, and the length of the crack C in the same direction is the crack length.
  • the length of the intermetallic compound layer 24 in the direction orthogonal to the axial direction of the columnar metal terminal 10 is defined as the thickness (layer thickness).
  • FIG. 9 is a graph showing the relationship between the ratio of the crack length to the interface length and the thickness of the intermetallic compound layer 24 in the terminal 1 according to the embodiment.
  • FIG. 9 it can be seen that when the thickness of the intermetallic compound layer 24 is larger than 5 ⁇ m, cracks C having a ratio of the crack length to the interface length of 100% are generated.
  • the thickness of the intermetallic compound layer 24 is 5 ⁇ m or less, it is found that the crack C in which the ratio of the crack length to the interface length is 100% is not generated. That is, when the thickness of the intermetallic compound layer 24 is 5 ⁇ m or less, it is possible to prevent the crack C from growing to the same extent as the interface length.
  • the columnar metal terminal 10 has a polygonal columnar shape
  • the metal wire 20 has at least one intersecting portion 23 connected to the columnar metal terminal
  • the intersecting portion 23 is the intermetallic compound layer 24 in the columnar metal terminal 10. It is arranged on the side surface where no is formed.
  • intersection 23 of the metal wire 20 When the intersection 23 of the metal wire 20 is provided on the joining terminal surface 110 of the columnar metal terminal 10, the intersection 23 is sandwiched between the pair of welding electrodes 30 during thermocompression bonding and resistance welding. Since the intersecting portion 23 is thicker than the other portions of the metal wire 20, there is a portion that does not contact the pair of welding electrodes 30 in the other portion. As a result, there is a possibility that thermocompression bonding and resistance welding cannot be reliably performed in the portion of the metal wire 20 other than the intersecting portion 23.
  • the crossing portion 23 of the metal wire 20 is provided on the side surface of the columnar metal terminal 10 other than the joining terminal surface 110, that is, the side surface on which the intermetallic compound layer 24 is not formed, the crossing portion 23 has a pair of crossing portions 23.
  • the welding electrode 30 is arranged at a position where it is not sandwiched. Therefore, since only the single-wound portion of the metal wire 20 is arranged on the joining terminal surface 110 of the columnar metal terminal 10, the pair of welding electrodes 30 can be reliably brought into contact with these portions. .. Therefore, the reliability of thermocompression bonding and resistance welding can be improved.
  • the base material layer 11 of the columnar metal terminal 10 is formed of a metal having iron as a main component, which has a relatively high electric resistance, Joule heat is efficiently generated during resistance welding. be able to.
  • the plated layer 12 is formed of the second metal whose main component is copper, which has a relatively low electric resistance, a current easily flows in the surface layer of the columnar metal terminal 10 during resistance welding, and the metal wire 20 is It is possible to prevent electricity from flowing concentrated on the metal wire 21. Therefore, melting of the metal wire 21 can be suppressed.
  • FIG. 10 is a sectional view showing a terminal 1A according to the first modification. Specifically, FIG. 10 is a diagram corresponding to FIG. 2. As shown in FIG. 10, the columnar metal terminal 10a included in the terminal 1A is entirely formed of a second metal containing copper as a main component, and a plating layer is not formed on the surface thereof. That is, before winding the metal wire 20, the second metal is exposed as a whole on the surface of the columnar metal terminal 10a.
  • the metal wire 20 of the metal wire 20 is wound around the columnar metal terminal 10a and subjected to thermocompression bonding and resistance welding, so that the metal wire 21 of the metal wire 20 is on the bonding terminal surface 110a of the columnar metal terminal 10a.
  • the metal and the intermetallic compound layer 24a are formed and metal-bonded.
  • the intermetallic compound layer 24a is made of aluminum, which is the main component of the first metal forming the metal wire 21, and copper, which is the main component of the second metal forming the columnar metal terminal 10a.
  • FIG. 11 is a sectional view showing a terminal 1B according to Modification 2. Specifically, FIG. 11 is a diagram corresponding to FIG. 2. As shown in FIG. 11, in the columnar metal terminal 10b included in the terminal 1B, the base material layer 11 is coated with the plating layer 12b formed of the second metal containing nickel as a main component.
  • a metal wire 20 is wound around the columnar metal terminal 10b, and thermocompression bonding and resistance welding are performed, so that the metal wire 21 of the metal wire 20 forms the plating layer 12b on the joint terminal surface 110b of the columnar metal terminal 10b. And an intermetallic compound layer 24b is formed and metal bonding is performed.
  • the intermetallic compound layer 24b is made of aluminum, which is the main component of the first metal forming the metal wire 21, and nickel, which is the main component of the second metal forming the columnar metal terminal 10a. Since the plating layer 12b is formed of the second metal containing nickel as a main component, the plating layer 12b has a melting point according to the melting point of nickel (1455° C.). That is, also in this case, the melting point of the first metal containing aluminum as the main component is lower than the melting point of the second metal by 300 degrees or more.
  • FIG. 12 is a cross-sectional view showing a terminal 1C according to Modification 3. Specifically, FIG. 12 is a diagram corresponding to FIG. As shown in FIG. 12, in the columnar metal terminal 10c included in the terminal 1C, the surface layer of the plating layer 12 is coated with a plating layer 12c made of a third metal containing tin (Sn) as a main component. The plated layer 12 c is laminated on the entire surface of the plated layer 12 before winding the metal wire 20.
  • the plating layer 12c is formed of the third metal containing tin as a main component, it has a melting point according to the melting point of tin (232° C.).
  • the columnar metal terminal 10c and the metal wire 20 are higher than the melting point of the third metal and lower than the melting point of the first metal. Heated at temperature. As a result, the plating layer 12c receives pressure from the pair of welding electrodes 30 in a melted state, so that the plating layer 12c is pushed outward from the interface between the metal wire 20 and the plating layer 12.
  • the metal wire 21 of the metal wire 20 is metal-bonded by forming the plating layer 12 and the intermetallic compound layer 24c on the bonding terminal surface 110c of the columnar metal terminal 10c.
  • the intermetallic compound layer 24c is made of aluminum, which is the main component of the first metal forming the metal wire 21, and copper, which is the main component of the second metal forming the columnar metal terminal 10c.
  • the plating layer 12c covers the surface of the plating layer 12 outside the metal wire 21 and the intermetallic compound layer 24.
  • the plating layer 12c fills the gap between the metal wire 21 and the columnar metal terminal 10c when melted during thermocompression bonding. By filling this gap, heat conduction during resistance welding is enhanced.
  • Modification 4 In the above-mentioned embodiment, the case where one metal wire 20 is wound around the columnar metal terminal 10 and metal-bonded to each other has been illustrated. However, a plurality of metal wires may be wound around the columnar metal terminal. In Modification 4, as an example, a case where two metal wires 20d1 and 20d2 are wound around the columnar metal terminal 10d is illustrated.
  • FIG. 13 is a front view showing a schematic configuration of a terminal 1D according to Modification 4.
  • two metal wires 20d1 and 20d2 are wound around the columnar metal terminal 10d of the terminal 1D.
  • the two metal wires 20d1 and 20d2 have intersecting portions 23d1 and 23d2, respectively, and these intersecting portions 23d1 and 23d2 are arranged at positions that do not overlap each other.
  • the two metal wires 20d1 and 20d2 are wound around the columnar metal terminal 10d in a double spiral shape so as not to overlap each other, and metal-bonded to the columnar metal terminal 10d.
  • a plurality of metal wires 20d1 and 20d2 are provided, and each of them is wound around the columnar metal terminal 10d.
  • the columnar metal terminal 10d can be shared.
  • the wire diameters of the plurality of metal wires 20d1 and 20d2 may be the same or different.
  • the wire diameters of the metal wires provided in each of the plurality of metal wires 20d1 and 20d2 may be the same or different.
  • FIG. 14 is a cross-sectional view showing a terminal 1D according to Modification 4, in which a plurality of metal wires 20d1 and 20d2 having different wire diameters are metal-bonded to each other. In FIG. 14, only the metal wires 21d1 and 21d2 from which the resin layer has been removed are shown.
  • the metal wires 21d1 and 21d2 are metal-bonded to the plating layer 12 at the bonding terminal surface 110d of the columnar metal terminal 10. Therefore, intermetallic compound layers 24d1 and 24d2 are formed at the boundaries between the metal wires 21d1 and 21d2 and the columnar metal terminals 10.
  • the wire diameters of the metal wires 21d1 and 21d2 in the metal-bonded state are the lengths z1 and z2 of the metal wires 21d1 and 21d2 along the axial direction of the columnar metal terminal 10.
  • the thicknesses h1 and h2 of the metal wires 21d1 and 21d2 along the direction orthogonal to the axial direction of the columnar metal terminal 10 are equal.
  • the metal wires 21d1 and 21d2 were circular cross-sections having different wire diameters (virtual lines L11 and L12 in FIG. 14).
  • the metal wires 21d1 and 21d2 having different wire diameters are first pressed against the columnar metal terminal 10 so as to have a uniform thickness in the thermocompression bonding process and to be in close contact with the plating layer 12. Further, by being pressed in the resistance welding process, the metal wires 21d1 and 21d2 are made uniform in thickness h1 and h2 and metal-bonded to the columnar metal terminal 10. The quality of the resistance welding process is stabilized by making the thicknesses of the metal wires 21d1 and 21d2 uniform in the thermocompression bonding process. Since the melting points of the metal wires 21d1 and 21d2 are lower than that of the columnar metal terminal 10d, the thickness of the metal wires 21d1 and 21d2 having different wire diameters can be easily made uniform in the thermocompression bonding process.
  • the intermetallic compound layers 24d1 and 24d2 can be reliably formed.
  • the metal wire in a state in which the metal wire is not entangled with the columnar metal terminal, that is, in a state where the metal wire has no intersection and is simply wound around the columnar metal terminal, And may be metal-bonded.
  • the case where the intermetallic compound layer 24 is formed of the first metal containing aluminum as the main component and the second metal containing copper as the main component is illustrated.
  • the case where the intermetallic compound layer 24b is formed of the first metal containing aluminum as the main component and the second metal containing nickel as the main component is illustrated.
  • the main component of the first metal and the main component of the second metal are not limited to the above examples. .. The difference may be less than 300 degrees as long as the melting point of the first metal is lower than the melting point of the second metal.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Connections Effected By Soldering, Adhesion, Or Permanent Deformation (AREA)

Abstract

L'invention concerne une borne (1) qui comporte : une borne métallique en colonne (10) et un fil métallique (20) qui est enroulé autour de la borne métallique en colonne (10). Le point de fusion d'un premier métal constituant le fil métallique (20) est inférieur au point de fusion d'un second métal constituant la borne métallique en colonne (10). Une couche de composé intermétallique (24) du premier métal et du second métal est disposée au niveau de l'interface entre le fil métallique (20) et la borne métallique en colonne (10).
PCT/JP2019/045312 2018-12-27 2019-11-19 Borne WO2020137267A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2020562925A JP7016022B2 (ja) 2018-12-27 2019-11-19 端子

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JP2018245498 2018-12-27
JP2018-245498 2018-12-27

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WO2020137267A1 true WO2020137267A1 (fr) 2020-07-02

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS49134282U (fr) * 1973-03-20 1974-11-19
JPS571213A (en) * 1980-06-03 1982-01-06 Omron Tateisi Electronics Co Treating method for terminal of coil
JPS59170973U (ja) * 1983-04-30 1984-11-15 富士通株式会社 巻付け端子用アダプタ−
JP2013027079A (ja) * 2011-07-19 2013-02-04 Panasonic Corp アルミニウム電線を用いた電動機
JP2015076208A (ja) * 2013-10-07 2015-04-20 矢崎総業株式会社 電線の端子接合構造及び抵抗溶接用電極、電線の端子接合方法

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS49134282U (fr) * 1973-03-20 1974-11-19
JPS571213A (en) * 1980-06-03 1982-01-06 Omron Tateisi Electronics Co Treating method for terminal of coil
JPS59170973U (ja) * 1983-04-30 1984-11-15 富士通株式会社 巻付け端子用アダプタ−
JP2013027079A (ja) * 2011-07-19 2013-02-04 Panasonic Corp アルミニウム電線を用いた電動機
JP2015076208A (ja) * 2013-10-07 2015-04-20 矢崎総業株式会社 電線の端子接合構造及び抵抗溶接用電極、電線の端子接合方法

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