JP2010108828A - Connecting part and connecting method of conductor and terminal - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a connecting part and a connecting method of a cable and a terminal, for connecting the cable and the terminal made of dissimilar metals such as an aluminum cable and a copper terminal at a low cost with stable electrical characteristics maintained, by preventing electrolytic corrosion of the aluminum cable from being produced even when it is exposed to water by condensation or the like. <P>SOLUTION: In this connecting method of the conductor and the terminal, the insulating coating part of the conductor and a conductor part are crimped to a part of the terminal to connect the conductor and the terminal made of dissimilar metals, a resin material prepared so that adhesive strength of the resin against metal becomes not less than 3 MPa is applied so as to seal and cover the conductor exposed from the terminal and at least a part of the terminal, and the resin material is cured. The connecting part of the conductor and the terminal includes the terminal and the conductor made of a dissimilar metal which are connected with the conductor part and the insulating coating part crimped to the terminal, and a resin layer applied so as to seal and cover the conductor part exposed from the terminal and at least a part of the terminal. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a connecting portion and a connecting method of an electric wire and a terminal made of different metals, and more particularly, to a connecting portion and a connecting method of a copper terminal used for connection with an aluminum electric wire (an electric wire using aluminum or an aluminum alloy as a conductor).

  In the fields of automobiles, office automation equipment, and home appliances, copper wires having a core wire made of a copper-based material having excellent electrical conductivity have been used as signal lines and power lines. In particular, in the automotive field, the performance of high-performance and high-performance vehicles has been rapidly promoted, so the number of electric wires and control equipment mounted on the vehicle tends to increase. There is the present situation. Under these circumstances, when trying to improve fuel efficiency by reducing the weight of a vehicle, aluminum wires that are lighter and cheaper than copper wires are attracting particular attention in the automotive field.

However, when an aluminum electric wire having a core wire made of an aluminum-based material is actually used for automobiles, electrolytic corrosion such as contact corrosion of different metals occurs. That is, aluminum is subject to severe corrosion in excess of normal electrolytic corrosion in the presence of water and copper ions. In addition to aluminum wires, when wiring work is performed, it is necessary to attach connection terminals to the wires in order to connect wires, connect wires to terminals of external electrical devices, or connect to external electrical devices. There is. Many of these terminals and wires are made of copper having excellent electrical characteristics as described above. For this reason, there are cases where aluminum and copper must be contacted and joined.
JP 2004-111058 A

  However, when dissimilar metals having different standard electrode potentials such as aluminum and copper are joined, electrolytic corrosion as described above occurs at the contact / joint portion. In particular, the standard electrode potential difference between the aluminum core wire and the connectors connected to each other is large. For this reason, when it gets wet by running in the rain, washing a car, or dew condensation, ionization of the aluminum core wire portion which is electrically base proceeds and corrosion is promoted. As a result, the contact state of the end part deteriorates and the electrical characteristics become unstable.In addition, the electrical resistance increases due to the increase in contact resistance and the wire diameter decreases due to corrosion. It is also possible to stop functioning.

  As conventional methods for preventing such electrolytic corrosion, there are a method in which a connector terminal is filled with a waterproofing agent such as a resin and molding, and a method in which a waterproof connector is used. However, when molding is performed, the structure and the manufacturing process are complicated, and the amount of resin used is large, so that the cost is increased. In addition, even when using a waterproof connector, using a waterproof connector where a conventional waterproof connector is not required causes a significant cost increase, and if cracks occur due to vibration fatigue or deterioration over time, this crack will occur. If rainwater or the like once enters the waterproof connector from the part, it results in promoting electric corrosion.

  Accordingly, the object of the present invention is to solve the conventional problems and prevent the occurrence of electrolytic corrosion of the aluminum electric wire even when it is exposed to water by condensation or the like, and is made of a different metal such as an aluminum electric wire and a copper terminal. An object of the present invention is to provide a connecting portion and a connecting method between an electric wire and a terminal, which can connect the electric wire and the terminal at low cost while maintaining stable electrical characteristics.

The present inventor has intensively studied to solve the conventional problems described above. As a result, the following was found.
That is, for example, an aluminum conductor that is a dissimilar metal and a copper terminal are connected, and a resin material prepared so that the adhesive strength of the resin to the connected metal is 3 MPa or more is at least one of the conductor exposed from the terminal and the terminal. The resin material is cured so that the water absorption is 5% or less. By such treatment, the core portion of the aluminum electric wire is sealed and cut off from the outside, and even when water exposure due to condensation occurs, the water does not come into contact with the aluminum electric wire. The conductor and the terminal of the dissimilar metal can be connected while maintaining the characteristics. Since the resin material is applied only to a necessary portion and cured, a complicated manufacturing process is not required and the conductor and the terminal can be connected at low cost.

  Further, when the viscosity of the resin material before being cured is in the range of 5,000 mPa · s to 20,000 mPa · s, the resin layer formed by being applied and cured has excellent durability and is covered by condensation or the like. Even when water is generated, it is possible to connect a conductor of a different metal and a terminal while maintaining stable electrical characteristics over time.

  The present invention has been made on the basis of the above research results, and the first aspect of the conductor and terminal connection method of the present invention is that the insulation covering portion and the conductor portion of the conductor are crimped by a part of the terminal. A resin material prepared by connecting the conductor, which is a dissimilar metal, to the terminal, and having a resin adhesive strength to the metal of 3 MPa or more, and a conductor exposed from the terminal and at least a part of the terminal. It is a connection method between a conductor and a terminal, which is applied so as to be sealed and covered, and the resin material is cured so that the water absorption is 5% or less.

  A second aspect of the conductor and terminal connection method according to the present invention is a conductor and terminal connection method in which a thickness of the applied resin material is equal to or greater than a thickness of the insulating coating portion of the conductor. .

  A third aspect of the conductor and terminal connection method according to the present invention is a conductor and terminal connection method in which the resin material is silicon-based, acrylic-based, urethane-based, polyamide-based, or epoxy-based resin.

  A fourth aspect of the conductor and terminal connection method of the present invention is a conductor and terminal connection method in which the viscosity of the resin material before curing is in the range of 5,000 mPa · s to 20,000 mPa · s. is there.

  A fifth aspect of the conductor-terminal connection method of the present invention is a conductor-terminal connection method in which the conductor is made of aluminum or an aluminum alloy and the terminal is made of copper or a copper alloy.

  According to a first aspect of the conductor-terminal connection part of the present invention, the terminal, the terminal connected to the terminal by crimping the conductor part and the insulation coating part, a conductor of a dissimilar metal, and the conductor exposed from the terminal And a conductor-terminal connection portion provided with a resin layer coated so as to cover at least a part of the terminal.

  The 2nd aspect of the connection part of the conductor of this invention and a terminal is a connection part of a conductor and a terminal whose adhesive strength of the said resin layer with respect to the said terminal and / or the said conductor part is 3 Mpa or more.

  A third aspect of the connection portion between the conductor and the terminal according to the present invention is a connection portion between the conductor and the terminal in which the thickness of the resin layer is equal to or greater than the thickness of the insulating coating portion of the conductor.

  The 4th aspect of the connection part of the conductor of this invention and a terminal is a connection part of a conductor and a terminal whose water absorption of the said resin layer is 5% or less.

  A fifth aspect of the conductor-terminal connection portion according to the present invention is a conductor-terminal connection portion in which the conductor is made of aluminum or an aluminum alloy and the terminal is made of copper or a copper alloy.

  According to a sixth aspect of the conductor-terminal connection portion of the present invention, the conductor portion is formed so as to cover the conductor portion where the resin layer is exposed and the portion of the terminal crimping the conductor. It is a connection part.

  The 7th aspect of the connection part of the conductor of this invention and a terminal is a connection part of a conductor and a terminal formed so that only the conductor part which the said resin layer exposed may be covered.

  The 8th aspect of the connection part of the conductor of this invention and a terminal is a connection part of a conductor and a terminal in which the front-end | tip part of the said conductor part is located in the conductor part crimping | compression-bonding part of the said terminal.

  According to the present invention, a conductor and a terminal exposed from a terminal are made of a resin material prepared such that a conductor of aluminum, for example, a dissimilar metal, and a copper terminal are connected, and the adhesive strength of the resin to the connected metal is 3 MPa or more. Since the resin material is cured so as to have a water absorption rate of 5% or less, at least a part of the wire is hardened so that the water absorption is 5% or less. Even when water exposure occurs due to, for example, water does not come into contact with the aluminum electric wire, it is possible to connect the conductor and the terminal of the dissimilar metal while maintaining stable electrical characteristics. Since the resin material is applied only to a necessary portion and cured, a complicated manufacturing process is not required and the conductor and the terminal can be connected at low cost.

The aspect of the connection part and connection method of the conductor and terminal of this invention are demonstrated in detail, referring drawings.
One aspect of the method for connecting a conductor and a terminal according to the present invention is to connect the conductor and the terminal, which are dissimilar metals, by crimping the insulating covering portion and the conductor portion of the conductor at a part of the terminal, The resin material prepared to have an adhesive strength of 3 MPa or more is applied so as to cover and cover at least a part of the conductor exposed from the terminal and the terminal, and the resin material has a water absorption rate of 5%. It is a connection method of a conductor and a terminal, which is cured to be as follows.

One aspect of the conductor-terminal connection portion of the present invention is the terminal, the terminal connected to the terminal by crimping the conductor portion and the insulation coating portion, a conductor of a different metal, and the conductor portion exposed from the terminal. And a conductor-terminal connection portion including a resin layer applied so as to cover at least a part of the terminal.
FIG. 1 is a diagram for explaining one aspect of a conductor-terminal connection portion according to the present invention. Fig.1 (a) is a side view of the connection part of a conductor and a terminal. FIG.1 (b) is a top view of the connection part of a conductor and a terminal.

  The copper terminal 3 includes a terminal main body 9 formed by pressing a copper plate, a first crimping portion 6, and a second crimping portion 7. The conductor 2 made of aluminum (for example, an aluminum electric wire, hereinafter, a conductor will be described with reference to a specific aluminum electric wire), the insulation coating portion 4 and the conductor portion 5 (for example, an aluminum core wire portion, hereinafter referred to as a specific aluminum electric wire) Explain).

  The first crimping part 6 of the terminal 3 is made up of a pair of rectangular pieces for crimping the insulating coating part 4 of the aluminum electric wire 2 by mechanical caulking. The second crimping portion 7 of the terminal 3 is composed of another pair of rectangular pieces that are crimped by crimping the aluminum core wire portion 5 of the aluminum electric wire 2. Between the 1st crimping | compression-bonding part 6 and the 2nd crimping | compression-bonding part 7, and between the 2nd crimping | compression-bonding part 7 and the terminal main body 9, the notch parts 10 and 11 by which the upper end part was each cut off are provided.

  As shown in FIG.1 (b), the aluminum electric wire 2 is attached to the terminal 3, and the insulation coating part 4 is mechanically caulked and fixed by the 1st crimping | compression-bonding part 6 which consists of a pair of rectangular one part. . It is preferable that the gap between the inner surface of the first crimping portion 6 and the outer surface of the insulating coating portion 4 is fixed so as not to be generated. The aluminum core wire portion 5 from which the insulating coating portion 4 has been removed is mechanically caulked and fixed by a second crimping portion 7 composed of another pair of rectangular pieces. Similarly, it is preferable that the gap between the inner surface of the second crimping portion 7 and the outer surface of the aluminum core wire portion 5 is fixed so as not to cause a gap.

  In the aspect shown in FIG. 1, in the aluminum electric wire 2 attached to the terminal 3, the base portion 5-1 of the aluminum core wire portion 5 is exposed from between the first crimping portion 6 and the second crimping portion 7. Furthermore, the front-end | tip part 5-2 of the aluminum core wire part 5 is exposed from between the 2nd crimping | compression-bonding part 7 and the terminal main body 9. FIG. Thus, the base 5-1 of the exposed aluminum core wire portion of the aluminum electric wire 2 attached to the terminal 3 and the tip 5-2, and at least a part of the first crimping portion and the second crimping portion around it. A resin material is applied so as to be sealed and covered, and cured using, for example, UV or the like to form the resin layers 8-1 and 8-2.

  Aluminum cores are usually composed of a large number of stranded wires, and if water adheres, the capillarity causes water to penetrate into the insulation coating, causing crevice corrosion and causing problems in the energization of the wires themselves. Therefore, as shown in FIGS. 1A and 1B, the resin layer 8 is applied by applying a resin material so that the exposed aluminum core portions 5-1 and 5-2 can be completely blocked from the outside. -1,8-2 are required to be formed.

  As shown in one aspect of the conductor and terminal connection method of the present invention, as described above, the insulation coating portion 4 and the aluminum core wire portion 5 of the aluminum electric wire 2 are connected to the first crimping portion 6 and the second crimping portion of the terminal 3. The aluminum wire and the copper terminal, which are different metals, are connected to each other, and a resin material is applied and cured so that at least a part of the aluminum wire exposed from the terminal and the terminal is hermetically covered. The resin material to be applied is a resin material prepared so that the adhesive strength of the resin to aluminum and copper is 3 MPa or more. The resin material is cured so that the water absorption is 5% or less.

  The adhesive strength of the silicon-based, acrylic-based, urethane-based, polyamide-based, or epoxy-based resin is adjusted to be 3 MPa or more within a temperature range of -40 ° C to 125 ° C. Furthermore, the viscosity of the resin material to be applied before curing is in the range of 5,000 mPa · s to 20,000 mPa · s.

  When a resin material having a viscosity within this range is used, desired fluidity and hardness can be obtained, and the resin material can be uniformly applied. When the viscosity is less than 5,000 mPa · s, the fluidity is excessively large and flows out of a desired region at the time of application, making it difficult to apply a desired thickness. On the other hand, when the viscosity exceeds 20,000 mPa · s, the fluidity of the resin material decreases, and the resin material does not reach the terminals and the fine portions of the exposed aluminum wires, making uniform application difficult.

  In addition, the thickness of the resin layer formed by applying a resin material and curing using UV or the like is equal to or greater than the thickness of the insulating coating portion of the aluminum electric wire. If the thickness of the resin layer is less than the thickness of the insulation coating of the aluminum wire, it will be difficult to effectively prevent corrosion such as foreign metal contact corrosion and maintain stable electrical characteristics over time. . Even if the thickness of the resin layer exceeds the thickness of the insulating coating portion of the aluminum electric wire, the effect is saturated and the resin material is wasted.

  The water absorption of the resin layer formed by applying and curing is 5% or less. If the water absorption rate of the resin layer exceeds 5%, the resin layer becomes excessively hard, and the resin layer and the aluminum core wire portion or a part of the terminal covering and sealing the aluminum core wire portion and a part of the terminal by vibration As a result, a slight gap is formed between the two layers, and the water is not completely cut off, making it difficult to maintain stable electrical characteristics over time.

  FIG. 2 is a diagram illustrating another embodiment of the conductor-terminal connection portion of the present invention. Fig.2 (a) is a side view of the connection part of a conductor and a terminal. FIG. 2B is a plan view of the connection portion between the conductor and the terminal. Also in this aspect, the copper terminal 33 includes a terminal body 39, a first crimping portion 36, and a second crimping portion 37 formed by pressing a copper plate. Similarly, the aluminum electric wire 32 includes an insulating coating portion 34 and an aluminum core wire portion 35.

  The first crimping part 36 of the terminal 33 is composed of a pair of rectangular pieces for crimping the insulation coating part 34 of the aluminum electric wire 32 by mechanical caulking. The second crimping portion 37 of the terminal 33 is composed of another pair of rectangular pieces that are crimped by crimping the aluminum core wire portion 35 of the aluminum electric wire 32. Between the 1st crimping | compression-bonding part 36 and the 2nd crimping | compression-bonding part 37, and between the 2nd crimping | compression-bonding part 37 and the terminal main body 39, the notch parts 40 and 41 by which the upper end part was each cut off are provided.

  Also in this embodiment, as shown in FIG. 2B, the aluminum electric wire 32 is mechanically caulked by the first crimping portion 36 which is attached to the terminal 33 and the insulating coating portion 34 is composed of a pair of rectangular pieces. Fixed. The aluminum core wire part 35 from which the insulating coating part 34 has been removed is mechanically caulked and fixed by a second crimping 37 comprising another pair of rectangular pieces. Also in the aspect shown in FIG. 2, in the aluminum electric wire 32 attached to the terminal 33, the base portion 35-1 of the aluminum core wire portion 35 is exposed from between the first crimping portion 36 and the second crimping portion 37. Further, the tip portion 35-2 of the aluminum core wire portion 35 is exposed from between the second crimping portion 37 and the terminal body 39.

  In this aspect, at least one pair of rectangles of the base portion 35-1 and the tip portion 35-2 of the exposed aluminum core wire portion 35 of the aluminum wire 32 thus attached to the terminal 33 and the first crimping portion. A resin material is applied so as to hermetically cover and cover the seam of one piece of the other and at least one pair of rectangular pieces of the second crimping part, for example, cured using UV or the like, A resin layer 38 is formed. In addition, you may apply | coat so that the boundary of the edge part of the 1st crimping | compression-bonding part 36 and the insulation coating part 34 may also be covered with a resin material.

  In this aspect, as described above, the joints of the first and second crimping portions are included so that the exposed aluminum core portions 35-1 and 35-2 can be completely blocked from the outside. The resin layer 38 is formed by generally applying a resin material over the entire surface. The type of the resin material, the adhesive strength of the resin to aluminum and copper, the viscosity of the resin material to be applied, and the water absorption rate of the resin layer formed by applying and curing are the same as those described with reference to FIG. is there.

  FIG. 3 is a plan view for explaining another embodiment of the conductor-terminal connection portion of the present invention. The conductor-terminal connection part in this aspect is the same as that described with reference to FIG. 1, and the aluminum wire is disposed so that the tip of the aluminum core wire part is located in the second crimping part and is not exposed to the notch part. It is the same except that it is attached to the terminal.

  That is, in the embodiment shown in FIG. 1, the aluminum wire 2 attached to the terminal 3 has the base portion 5-1 of the aluminum core wire portion 5 exposed between the first crimping portion 6 and the second crimping portion 7, The front end portion 5-2 of the aluminum core wire portion 5 is exposed from between the second crimping portion 7 and the terminal body 9. In this aspect, as shown in FIG. 3, in the aluminum electric wire 52 attached to the terminal 53, the base portion 5-1 of the aluminum core wire portion 55 is exposed from between the first crimping portion 56 and the second crimping portion 57. However, the tip of the aluminum core wire part 55 is located in the second crimping part 57 and is not exposed to the notch part 51.

  The portion where the base portion 55-1 of the aluminum core wire portion thus mounted is exposed, and a part of the first crimping portion and the second crimping portion located in the periphery thereof are shielded from outside and sealed and covered. The resin material is applied and cured to form the resin layer 58-1. The notch 51 in which the tip end portion of the aluminum core wire portion is not exposed also includes a part of the second pressure-bonding portion, and is coated with a resin material so as to be shielded from the outside and hermetically covered to be covered with the resin layer. 58-2 is formed. The type of the resin material, the adhesive strength of the resin to aluminum and copper, the viscosity of the resin material to be applied, and the water absorption rate of the resin layer formed by applying and curing are the same as those described with reference to FIG. is there.

  FIG. 4 is a cross-sectional view of the connection portion between the conductor and the terminal according to the present invention described with reference to FIG. FIG. 4A is a front view and shows positions A, B, and D described with reference to FIG. That is, the position A is between the second crimping part 37 and the terminal body 39, that is, the notch part 41. The position B is a joint line between another pair of rectangular pieces of the second pressure-bonding part. The position D is a seam of a pair of rectangular pieces of the first crimping part. FIG. 4B shows a cross section taken along line AA in FIG. FIG. 4C shows a cross section along the line BB. FIG. 4D shows a cross section along the line DD.

As shown in FIG. 4 (b), around each line of the aluminum core wire portion 35 mounted in the terminal 39 at the position A, that is, the notch portion 41 between the second crimping portion 37 and the terminal body 39. The resin layer 38 is completely covered without any exposure. Therefore, any part of the aluminum core wire part 35 is completely cut off from the outside.
Next, as shown in FIG. 4 (c), at the position B, that is, at the joint of another pair of rectangular pieces 37-1 and 37-2 of the second crimping portion 37, The tip portions of the other pair of rectangular pieces 37-1, 37-2 are mechanically caulked so as to bite into the aluminum core wire portion 35, respectively, and further, the pair of other rectangular pieces 37-1, The resin layer 38 covers the upper part of the joint line 37-2. That is, first, the aluminum core wire portion is completely cut off from the outside by another pair of rectangular pieces 37-1 and 37-2, and is further completely covered by the resin layer 38. Therefore, any part of the aluminum core wire part is completely cut off from the outside.

  Next, as shown in FIG. 4 (d), at the position D, that is, at the joint of the pair of rectangular pieces 36-1 and 36-2 of the first crimping portion, four rounds of the aluminum core wire portion 35. In the state where the insulating coating portion 34 is covered, the tip ends of the pair of rectangular pieces 36-1 and 36-2 of the first crimping portion mechanically caulk the insulating coating portion 34. A portion of the resin layer 38 is filled between the pair of rectangular pieces 36-1 and 36-2 of the first pressure-bonding portion and the insulating coating portion 34, and the pair of rectangular pieces 36. -1, 36-2 are covered with a resin layer 38.

  That is, a part of the resin layer covering the notch 40 between the first crimping part 36 and the second crimping part 37 described with reference to FIG. 2, that is, the base part of the aluminum core wire part is exposed is a pair. Since it penetrates between the rectangular pieces 36-1, 36-2 and the insulating coating 34, and the resin layer covers the upper part of the pair of rectangular pieces 36-1, 36-2, The aluminum core wire is completely cut off from the outside.

  Next, the connection portion between the conductor and the terminal of the present invention will be described in more detail with reference to examples. When the viscosity of the resin before curing is in the range of 5,000 mPa · s to 20,000 mPa · s, the adhesion strength of the resin to the metal and the absorption rate of the resin are changed, and a reliability test is performed by performing a reliability test. The change in value was examined. The results are shown in Table 1. The reliability test conditions were as follows: exposure to a high temperature of 120 ° C. for 120 hours, spraying of 5% salt water at 35 ° C. for 96 hours, and further high temperature of 85 ° C. and high humidity of 95 RH (relative humidity) for 96 hours. I was exposed. The criteria for determination were a pass (o) when the variation rate of the contact resistance before the test was 2.5 mΩ or less, and a failure (x) when the variation rate was greater than 2.5 mΩ.

  As shown in Table 1, when the adhesive strength was less than 3 MPa, the fluctuation rate exceeded 2.5 mΩ and was largely rejected regardless of the water absorption value. On the other hand, when the adhesive strength was 3 MPa or more, the fluctuation rate was 2.5 mΩ or less within the range of water absorption of 0.3 to 5.0, which was acceptable. However, when the water absorption rate exceeded 5.0 (failed in 5.1), the fluctuation rate was large exceeding 2.5 mΩ. As is apparent from the above, when the viscosity of the resin is in the range of 5,000 mPa · s to 20,000 mPa · s, the adhesive strength is 3 MPa or more, and the water absorption is 5.0 or less, high performance is exhibited. Yes.

  Next, the variation of the contact resistance value depending on the position where the resin material was applied was examined. The results are shown in Table 2. The position where the resin is applied is shown in FIG. The position A is between the second crimping part 57 and the terminal body 59, that is, the notch part 51. The position B is a joint line between another pair of rectangular pieces of the second pressure-bonding part. The position C is the notch 50 between the first crimping part 56 and the second crimping part 57, that is, the base part of the aluminum core wire part is exposed. The position D is a seam of a pair of rectangular pieces of the first crimping part.

  As shown in Table 2, when the resin was applied alone at each of the positions A to D alone, the variation rate exceeded 2.5 mΩ, which was largely unacceptable. On the other hand, when the resin was applied to both position A and position C (A + C), the variation rate was 2.5 mΩ or less, which was acceptable. Furthermore, when the resin was applied to all portions (A + B + C + D) from position A to D, the variation rate was 2.5 mΩ or less, which was particularly excellent. Therefore, it can be understood that, when a resin layer is formed by applying a resin to at least a portion where the aluminum core portion is exposed and forming a resin layer, even if water adheres, electrolytic corrosion is prevented.

  As described above, according to the present invention, even when it is wetted by condensation or the like, the generation of electrolytic corrosion of the aluminum electric wire is prevented, and the electric wire and the terminal made of different metals such as the aluminum electric wire and the copper terminal are reduced in cost. Thus, it is possible to provide a connection portion and a connection method between an electric wire and a terminal that can be connected while maintaining stable electrical characteristics.

FIG. 1 is a diagram for explaining one aspect of a conductor-terminal connection portion according to the present invention. Fig.1 (a) is a side view of the connection part of a conductor and a terminal. FIG.1 (b) is a top view of the connection part of a conductor and a terminal. FIG. 2 is a diagram illustrating another embodiment of the conductor-terminal connection portion of the present invention. Fig.2 (a) is a side view of the connection part of a conductor and a terminal. FIG. 2B is a plan view of the connection portion between the conductor and the terminal. FIG. 3 is a plan view for explaining another embodiment of the conductor-terminal connection portion of the present invention. FIG. 4 is a cross-sectional view of the connection portion between the conductor and the terminal according to the present invention described with reference to FIG.

Explanation of symbols

1, 30, 50 Conductor and terminal connection part 2, 32, 52 Conductor (aluminum wire)
3, 33, 53 Terminal 4, 34, 54 Insulation coating 5, 35, 55 Conductor (aluminum core)
6, 36, 56 First crimping part 7, 37, 57 Second crimping part 8, 38, 58 Resin layer 9, 39, 59 Terminal body 10, 11, 40, 41, 50, 51 Notch

Claims (13)

Crimping the insulation coating part and the conductor part of the conductor at a part of the terminal, and connecting the conductor and the terminal which are dissimilar metals,
A resin material prepared so that the adhesive strength of the resin to the metal is 3 MPa or more is applied so that the conductor exposed from the terminal and at least a part of the terminal are hermetically covered, and the resin material is absorbed by water. A method of connecting a conductor and a terminal, which is cured so that the rate is 5% or less.   The method for connecting a conductor and a terminal according to claim 1, wherein a thickness of the applied resin material is equal to or greater than a thickness of the insulating coating portion of the conductor.   The conductor and terminal connection method according to claim 1, wherein the resin material is a silicon-based, acrylic-based, urethane-based, polyamide-based, or epoxy-based resin.   The conductor-terminal connection method according to claim 3, wherein the viscosity of the resin material before curing is in the range of 5,000 mPa · s to 20,000 mPa · s.   The conductor-terminal connection method according to any one of claims 1 to 4, wherein the conductor is made of aluminum or an aluminum alloy, and the terminal is made of copper or a copper alloy.   Applying the terminal, the conductor connected to the terminal by crimping the conductor part and the insulation coating part, a conductor of a dissimilar metal, the conductor part exposed from the terminal and at least a part of the terminal in a sealed manner A conductor-terminal connection portion provided with a formed resin layer.   The connection part of the conductor and terminal of Claim 6 whose adhesive strength of the said resin layer with respect to the said terminal and / or the said conductor part is 3 Mpa or more.   The connection part of the conductor and terminal of Claim 6 or 7 whose thickness of the said resin layer is more than the thickness of the said insulation coating part of the said conductor.   The connection part of the conductor and terminal in any one of Claim 6 to 8 whose water absorption rate of the said resin layer is 5% or less.   The conductor-terminal connection part according to any one of claims 6 to 9, wherein the conductor is made of aluminum or an aluminum alloy, and the terminal is made of copper or a copper alloy.   11. The conductor-terminal connection portion according to claim 6, wherein the conductor-portion connection portion is formed so as to cover the conductor portion where the resin layer is exposed and the portion of the terminal crimping the conductor.   The connection part of the conductor and terminal of any one of Claim 6 to 10 formed so that only the conductor part which the said resin layer exposed may be covered.   The connection part of the conductor and terminal of Claim 12 in which the front-end | tip part of the said conductor part is located in the conductor part crimping | compression-bonding part of the said terminal.

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