CN207069080U - A kind of joint of copper tip and aluminum conductor - Google Patents
A kind of joint of copper tip and aluminum conductor Download PDFInfo
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- CN207069080U CN207069080U CN201720645835.1U CN201720645835U CN207069080U CN 207069080 U CN207069080 U CN 207069080U CN 201720645835 U CN201720645835 U CN 201720645835U CN 207069080 U CN207069080 U CN 207069080U
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Abstract
The utility model belongs to wire harness field, and in particular to the ultrasonic weld joints between a kind of copper tip and aluminum conductor.In order to solve in the prior art, the problem of electrochemical corrosion of copper tip and aluminum conductor joint and welding joint mechanical property difference, the utility model adds a spaced metallization between copper tip and aluminum conductor, spaced metallization is first fixed therein to the welding ends of a mother metal by modes such as plating, pressure welding, arc spray welding or magnetic discharge weldings, then again welded together three parts by way of supersonic welding.Joint of the present utility model can effectively reduce copper and electrochemical corrosion caused by aluminium electrode potential difference, improve mechanical property.
Description
Technical field
The utility model belongs to wire harness field, and in particular to the joint that copper tip connects with aluminum conductor in a kind of wire harness.
Background technology
Copper have good electric conductivity, thermal conductivity, plasticity and be widely used.However, copper resource is short, copper cost is high.
Therefore, people begin look for the substitute of copper to reduce cost.Aluminium price is relatively low, and equally have excellent electric conductivity,
Heat conduction and plastic working, it is the main trend developed at present for copper with aluminium, but some performances of aluminium are still not so good as copper therefore
Excellent, many components still can not be completely with aluminium for copper, therefore the weld situation between al member and copper component be present.Example
Such as, the wire being made up of aluminium class material uses as cable, in the copper component by this cable connection on various electric devices
When, or when being attached mutually with copper cable, connected in copper aluminium contact jaw by welding.
Connection for aluminium and copper is conductive, has two technical problems never to solve：1) aluminium is active metal, in drying
The surface of aluminium forms the dense oxidation film of thick about 50 angstroms (1 angstrom=0.1 nanometer) immediately in air, aluminium is not further aoxidized,
But also substantially reduce the electric conductivity of aluminum conductor simultaneously.2) copper belongs to different elements with aluminium, and the metal-inert of copper is greater than
Aluminium, the difference in Electrode Potential between copper and aluminium are 1.9997V, and the connection of both metals can occur electrochemical reaction after being powered, cause
Aluminum steel is gradually oxidized, and reduces the mechanical strength and electric conductivity of aluminum steel.
In the prior art, the preparation method of the joint of the terminal of wire harness and wire mainly has following several：Crimping, tradition are super
Sonic welding and ultrasonic brazing etc..
Existing wire harness often used in interconnection technique, and the connected mode of terminal and wire mainly based on crimping, i.e. lead by wire
Core is put into the connector of terminal, is crimped together terminal and wire by the way of machinery using terminal crimping mold.So
And for copper tip and this combination of aluminum conductor, traditional compression bonding method can not solve aluminum conductor and copper tip over time
Passage electrochemical reaction occurred, thus cause the mechanical property of copper tip and aluminum conductor joint and electric property to decline.Institute
With the connection for copper tip and aluminum conductor joint, the method for crimping is difficult to be applied in the industrial production.
Conventional ultrasound wave soldering, smaller by the oxide-film of weldering metal surface or the influence of coating welding quality, welding is not added with outer
Thermal source, is not in as cast condition nugget or weld metal zone brittle intermetallic thing, therefore, be copper tip and aluminum conductor joint prepare it is a kind of excellent
Select welding manner.But directly directly contacted using supersonic welding, copper aluminium, the two difference in Electrode Potential is big, pushing away over time
Move, electrochemical corrosion can be produced between copper tip and aluminum conductor, causes resistance to increase, voltage drop increase, mechanical property lowers, joint
Service life lower.Therefore, the B of patent CN 102216021 employ a kind of isolation of sealant copper tip and aluminum conductor it
Between, the method for then using ultrasonic bonding again, mitigate and occur electrochemical corrosion between copper aluminium, but due to the presence of sealant,
Not only make the welding between copper aluminium insufficient, cause the reduction of joint mechanical property, simultaneously as sealant electric conductivity is poor,
The electric conductivity of joint is influenceed, so that the mechanical property and electric property of copper tip and aluminum conductor joint can not all meet to use
Performance requirement and requirement to stability in use.Meanwhile the patent is mainly for flat terminal, and terminal and wire connect
Head non-flat shape terminal of major applications in wire harness, therefore, patent CN 102216021B have very big application limitation.
Ultrasonic brazing, the main vibration using ultrasonic wave smash the oxide-film of welding matrix surface, then pass through soldering
Mode combine two kinds of matrixes.When connecting copper tip and aluminum conductor prepares joint, significantly asked possessed by ultrasonic brazing
Topic cause its can not apply copper tip and aluminum conductor joint it is industrially prepared in.Specifically, the solder of ultrasonic brazing is not easy
Weld seam is filled up, unfilled irregular gap is formed easily between copper tip and aluminum conductor.And such a gap can only use and all break
The experiment of bad property is tested, and can not ensure that each joint stably meets electric property and mechanical property requirements.Therefore use
Ultrasonic brazing prepares copper tip and the method for aluminum conductor joint and can not be applied in large batch of industrial production.
To sum up, in the prior art, the copper for meeting the various shapes that wire harness uses can be prepared without a kind of welding manner
The mechanical property requirements and electrical performance requirements of terminal and aluminum conductor joint.Therefore, it is a kind of inexpensive, satisfaction can be prepared
The copper tip of wire harness requirement and the joint of aluminum conductor and preparation method thereof suddenly are waited to release.
Utility model content
The utility model purpose is to provide a kind of joint of copper tip and aluminum conductor.
The utility model purpose, which also resides in, provides a kind of joint for reducing difference in Electrode Potential between copper tip and aluminum conductor, and this connects
Head advantageously reduces or avoided the electrochemical corrosion of the joint of copper tip and aluminum conductor, significantly improves the service life of joint.
The utility model purpose, which also resides in, provides a kind of mechanical property that can effectively lift copper tip and aluminum conductor joint
Joint, compared to prior art, the pulling capacity lifting at least 20% of copper tip and aluminum conductor joint after salt mist experiment can be made.
The utility model purpose, which also resides in, provides a kind of joint for the copper tip and aluminum conductor that can effectively reduce cost, and it can
So that cost significantly reduces.
Above-mentioned purpose of the present utility model is realized by following technological means：
The utility model provides a kind of joint of copper tip and aluminum conductor, and described copper tip contains connector, and
The functor being connected with connector, the core of leading of described aluminum conductor are connected with the connector of copper tip, it is characterised in that described
Aluminum conductor lead core and the connector of copper tip is connected by spaced metallization.
In the utility model, described copper tip can be flat terminals, open end, cylinder terminal, or solid
One end of copper conductor.Described copper tip includes connector, and the functor being connected with connector.Wherein, described company
Fitting is the part that copper tip is connected with aluminum conductor；The connector of flat copper tip is flat, and the connector of open end is
Wing, the connector of cylinder terminal is cylindrical shape；Wherein, described functor is the fixation that copper tip is connected with power device
Region, it is that cable ends installation is fixed, and realizes the main region of copper tip and power device electrical connection.Solid copper conductor
Connector and functor structure on indistinction, simply connector be connected with aluminum conductor, functor and power device or other ends
Son is connected.
In the utility model, described aluminum conductor can be solid aluminum wire either more core aluminum conductors.
In the utility model, it is aluminium or aluminium alloy that the aluminum conductor, which leads core material, and the material of described copper tip is copper
Or copper alloy.
In the utility model, the joint of described copper tip and aluminum conductor has welding region, described welding region face
Product is at least the 1% of described aluminum conductor and copper tip overlapped region area；Preferably, described aluminum conductor and copper tip
Welding region area is at least the 10% of described aluminum conductor and copper tip overlapped region area.
In the utility model, the thickness of the spaced metallization is 3 μm to 5000 μm.As preferred embodiment,
Between the thickness of metal level is 5 μm to 1000 μm.If the thickness of spaced metallization is less than 3 μm, copper end during ultrasonic bonding
Son and aluminum conductor friction, spaced metallization are easily destroyed by copper tip and aluminum conductor, so that the contact of copper aluminium causes to be spaced metal
Layer does not play a part of being spaced two kinds of metals；When the thickness of spaced metallization is more than 5000 μm, metal is spaced due to most of
The electric conductivity of layer material is not so good as copper aluminum metal, and thickness instead results in greatly the voltage drop rise of welding point；In addition, interval metal
Dosage increases, cost increase, but performance is not obviously improved.In general, between being fixed by the way of plating, electric arc spraying
Every metal level, the thickness of spaced metallization can reach 3 μm to 1000 μm；When by the way of magnetic discharge welding or pressure welding, interval is golden
The thickness of category layer can reach 1000 μm to 5000 μm；Therefore the spaced metallization in the utility model is arranged on 3 μm to 5000 μ
In m thickness range.
In the utility model, the electrode potential of described spaced metallization material between copper and the electrode potential of aluminium,
It is either equal with the electrode potential of copper or aluminium, as preferred embodiment, the material of spaced metallization in the utility model
One kind or its combination in nickel, cadmium, zirconium, chromium, manganese, aluminium, tin, titanium, zinc, cobalt, it is more preferred to a kind of in aluminium, nickel and zinc
Or its combination.
Except the metal that electrode potential (includes equal situation) between copper and the electrode potential of aluminium can be used as this
The spaced metallization of utility model, gold or silver or its combination can also be used as spaced metallization, because the electric conductivity of gold, silver
It is good, and chemical characteristic is stable.
The combination of spaced metallization material described above, both formed for alloy comprising spaced metallization material, also included
Spaced metallization is formed in the form of multiple coating, also comprising different metal materials with being either physically or chemically mixed to form
The spaced metallization of different metal composition.
The utility model additionally provides a kind of ultrasonic welding method of copper tip and aluminum conductor joint, specifically, including
Following steps：
1) by spaced metallization by way of plating, magnetic discharge welding, electric arc spraying or pressure welding, it is fixed on copper end to be welded
The position including at least welding region of son or aluminum conductor；Preferably, spaced metallization is fixed on by way of plating
Copper tip to be welded or the position including at least welding region of aluminum conductor；
2) copper tip is engaged with aluminum conductor, be fixed on the mould or frock of device for ultrasonic welding；
3) start device for ultrasonic welding, the vibrational energy of device for ultrasonic welding is delivered to supersonic mould or frock
On welded, melt copper tip and aluminum conductor high-speed friction heat, and complete welding under the effect of the pressure.
When spaced metallization is attached to copper tip or aluminum conductor by the utility model, plating, magnetic discharge welding, electric arc can be used
Spraying, pressure welding or other can make other prior arts that spaced metallization is firmly secured on one of which mother metal.
Described electric plating method, its step are：1st, coated metal is in anode；2nd, material to be plated is in negative electrode；3rd, anode and cathode
It is connected with the electrolyte solution of coated metal cation composition；4th, after the power supply for passing to direct current, the metal of anode can aoxidize
(losing electronics), the cation in solution then into atom and accumulate in material top layer to be plated in cathodic reduction (obtaining electronics).
The method of described magnetic discharge welding, its step are：1st, need to weld two kinds of metals are stacked；2nd, electromagnetism soldering equipment is welding
Connect region and form high voltage magnetic field, make two kinds of metals that the shock of atomic energy level occur under the promotion of electromagnetic force, so that two kinds of gold
Category welds together.
The method of described electric arc spraying, it is that interval metal is delivered to arc zone and is atomized, and in compressed gas
The lower high-velocity spray of effect forms arc spray coatings to workpiece surface.
The method of described pressure welding, its step are：1st, two kinds of metals for needing pressure welding are stacked；2nd, applying pressure makes table to be welded
Face is fully diffused and combined between realizing atom；3rd, it is different and pressure source is different regarding metal, can be by increasing the side of temperature
Method improves welding effect, shortens weld interval.
As preferable mode, using electric plating method.1st, electroplating technology comparative maturity, from processing cost and time cost
Consider more advantageous；2nd, the coating of plating is more advantageous from the dosage and cost of interval metal typically than relatively thin；3rd, it is electric
The ability of copper tip or aluminum conductor after plating, resisting salt fog corrosion and acid and alkali corrosion greatly improves, the service life of extending connector.
4th, it is experimentally verified that, using electric plating method, the joint pulling capacity finally given and voltage drop have significant advantage.
In the step 1) of the preparation method of joint described in the utility model, when aluminum conductor outer layer adheres to insulating barrier,
Before fixation, the insulating barrier of aluminum conductor welding ends is first divested.
In the preparation method of joint described in the utility model, the supersonic frequency of device for ultrasonic welding for 5KHZ~
40KHZ；Different according to the sectional area of welding region, the power of device for ultrasonic welding selects 2KW~20KW, and ultrasonic bonding is set
The pressure of standby soldering tip selects 0.5KN~30KN, and the amplitude of device for ultrasonic welding can be from 0~100% regulation；As preferable
Embodiment, the ultrasonic frequency of device for ultrasonic welding is 15KHZ~25KHZ；The power of device for ultrasonic welding be 5KW~
15KW；The amplitude of device for ultrasonic welding is 30~100%；The pressure of ultrasonic equipment soldering tip is 3KN~20KN.
Be not in that welding temperature is too high due to the supersonic welding using solid-state in the utility model, generation fragility gold
Between category the problem of compound.The utility model uses material such as zinc, nickel or one kind in aluminium or its combination of spaced metallization,
First metal will be spaced using the mode of plating, magnetic discharge welding, electric arc spraying or pressure welding to be fixed on a kind of mother metal, then carry out ultrasonic wave
Weldering, its object is to prevent electrochemical corrosion between copper aluminium, and other solders and solder flux are not needed in welding process.
In existing research, the also not introduction to addition spaced metallization in copper aluminium ultrasonic bonding, and by a large amount of
Experiment and test, add spaced metallization after, the mechanical property and electric property that not only make copper tip and aluminum conductor joint obtain
To ensure, and the electrochemical corrosion resistant of copper tip and aluminum conductor joint and the performance of metal erosion is significantly lifted, use
Life-span is obviously improved.
The beneficial effect that the utility model obtains：
1. the connector of copper tip of the present utility model and and aluminum conductor lead core between contain spaced metallization, by a large amount of
Experiment and test, the presence of spaced metallization, the mechanical property and electric property for not only making copper tip and aluminum conductor joint obtain
To ensure, and the electrochemical corrosion resistant of joint and the performance of resistance to metal erosion are also significantly lifted.
2. relative to the joint of traditional copper tip and aluminum conductor, the larger metal of electrode potential difference is directly welded at one
Rise, due to electrochemical reaction be present between copper aluminium, in the presence of water and air, the relatively low metal of electrode potential can lose electronics
Cause metal erosion, reduce the life-span of copper-aluminium joint.Aluminum conductor lead core and the connector of copper tip passes through spaced metallization
Connection, can significantly reduce the electrochemical reaction between metal, reduce metal erosion, increase the service life at least 50%.
Due to the connection between being all metal, 3. avoid makes joint of the present utility model in the B of patent CN 102216021
The drawbacks of mechanical property caused by being welded with sealant reduces, can make the drawing of copper tip and aluminum conductor joint after salt mist experiment
Pull out force lifting at least 20%.
4. compared to prior art, the joint of copper tip and aluminum conductor provided by the utility model its preparation technology can be with
Using fully-automatic equipment, frock clamp is produced, and improves production efficiency, reduces the stability for manually, improving production, significantly drop
Low production cost.
5. the welding method of joint of the present utility model, compared to ultrasonic brazing, without heating, it will not be produced between copper aluminium
Raw brittle metal, be not in that weld strength and plasticity reduce, or even the problem of lattice corrosion；Meanwhile without using solder flux,
Will not Welded Joints generation corrosion.
6. not adding solder, scaling powder and protective gas etc. in welding process, machine also without reprocessing, without useless
Material, flash, cost is saved, reduce pollution.
Brief description of the drawings
Fig. 1 is the copper tip of the utility model embodiment 1 and the joint schematic diagram of aluminum conductor；
A：The joint of more core aluminum conductors and flat copper tip；
B：The joint of solid aluminum conductor and flat copper tip；
C：Figure 1A side schematic view；
Fig. 2 is the copper tip of the utility model embodiment 2 and the joint schematic diagram of aluminum conductor；
A：Opening copper tip before welding；
B：More core aluminum conductors；
C：Solid aluminum conductor；
D：Joint cross section after the welding of embodiment 2；
Fig. 3 is the copper tip of the utility model embodiment 3 and the joint schematic diagram of aluminum conductor；
A：The joint of more core aluminum conductor and cylinder copper tips；
B：The joint of solid aluminum conductor and cylinder copper tip；
Fig. 4 is the copper tip of the utility model embodiment 4 and the joint schematic diagram of aluminum conductor；
A：The joint of more core aluminum conductors and flat copper conductor；
B：The joint of solid aluminum conductor and flat copper conductor；
C：Fig. 3 A side schematic view.
Schema explanation：
1. copper tip, 11. connectors, 12. functors
2. core, 22. insulating barriers are led in aluminum conductor, 21.
3. spaced metallization
Embodiment
The technical solution of the utility model is further illustrated below by way of specific embodiment, specific embodiment does not represent pair
The limitation of scope of protection of the utility model.Some nonessential modifications and tune that other people are made according to the utility model theory
It is whole to still fall within the scope of protection of the utility model.
In the utility model, described " welding region " refers to that the soldering tip of ultrasonic equipment welds copper tip and aluminum conductor
Region together.
In the utility model, described " connector for leading core and copper tip of aluminum conductor connected by spaced metallization/
It is connected ", it should be understood that it is joined directly together or is indirectly connected and is included in the scope of protection of the utility model.Be joined directly together for
Leading for connector and aluminum conductor is only connected by spaced metallization between core；Be indirectly connected for connector and aluminum conductor lead core it
Between except spaced metallization, also with other non-metallic material structures, the structure formed such as graphene layer or other compositions.
The method of the joint and its supersonic welding of a kind of 1 copper tip of embodiment and aluminum conductor
Copper tip as shown in Figure 1 and the joint of aluminum conductor, the copper tip 1 are flat copper tip, and copper tip 1 contains connection
Part 11, and functor 12, described aluminum conductor 2 are more core aluminum conductors (figures containing core 21 and insulating barrier 22, aluminum conductor is led
1A) or solid aluminum conductor (Figure 1B).The core of leading of aluminum conductor 2 is connected with the connector 11 of copper tip 1, and aluminum conductor leads core and copper end
Between the connector of son, contain spaced metallization 3.
The specific welding step of the joint is as follows：
1) copper tip is in welding region plating spaced metallization (being in the present embodiment nickel), the thickness of spaced metallization
8μm。
2) copper tip is put into the mould of device for ultrasonic welding, aluminum conductor is put into the mould of device for ultrasonic welding
In, stacked with copper tip；
3) start device for ultrasonic welding, after three kinds of metals are compacted by soldering tip, start Vibration Welding.Described ultrasonic wave
Frequency is 20KHZ；The power of device for ultrasonic welding is 5KW；Weld amplitude is 80%；The pressure of wave welding head of ultrasonic wave is 4.5KN.
The method of the joint and its supersonic welding of a kind of 2 copper tip of embodiment and aluminum conductor
Copper tip as shown in Figure 2 and the joint of aluminum conductor, the copper tip 1 are open end, and copper tip 1 contains connector
11, and functor 12, for described aluminum conductor 2 containing core 21 and insulating barrier 22 is led, aluminum conductor is more core aluminum conductors (Fig. 2 B)
Or solid aluminum conductor (Fig. 2 C).The core 21 of leading of aluminum conductor 2 is connected with the connector 11 of copper tip 1, and aluminum conductor leads core and copper end
Between the connector of son, also containing spaced metallization 3.
The specific welding step of the joint is as follows：
1) copper tip is in welding region plating spaced metallization (being in the present embodiment zinc), the thickness of spaced metallization
5μ m。
2) copper tip is put into crimp, the core of leading of aluminum conductor is put into the opening of copper tip, start crimping
Aluminum conductor crimping into copper tip, is made the opening of copper tip encase the welding portion of aluminum conductor by machine；
3) three kinds of metals after step 2) is crimped are put into ultrasonic welding mould；
4) start ultrasonic welding machine, after three kinds of metals are compacted by soldering tip, start Vibration Welding.The frequency of described ultrasonic wave
Rate is 20KHZ；The power of device for ultrasonic welding is 9KW；Weld amplitude is 90%；The pressure of wave welding head of ultrasonic wave is 15KN.
The method of the joint and its supersonic welding of a kind of 3 copper tip of embodiment and aluminum conductor
Copper tip as shown in Figure 3 and the joint of aluminum conductor, the copper tip 1 are cylinder terminal, and copper tip 1 contains connector
11, and functor 12, for described aluminum conductor 2 containing core 21 and insulating barrier 22 is led, aluminum conductor is more core aluminum conductors (Fig. 3 A)
Or solid aluminum conductor (Fig. 3 B).The core 21 of leading of aluminum conductor 2 is connected with the connector 11 of copper tip 1, and aluminum conductor leads core and copper end
Between the connector of son, also containing spaced metallization 3.
The specific welding step of the joint is as follows：
1) copper tip is in welding region plating spaced metallization (being in the present embodiment silver), the thickness of spaced metallization
10 μm。
2) by the cylinder for leading core weld zone insertion copper tip of aluminum conductor；
3) three kinds of metals after the grafting for obtaining step 2) are put into the mould of ultrasonic welding machine；
4) start ultrasonic welding machine, after three kinds of metals are compacted by soldering tip, start Vibration Welding.The frequency of described ultrasonic wave
Rate is 25KHZ；The power of device for ultrasonic welding is 7.5KW；Weld amplitude is 100%；The pressure of wave welding head of ultrasonic wave is 10KN.
The method of the joint and its supersonic welding of a kind of solid copper conductor of embodiment 4 and aluminum conductor
Copper tip as shown in Figure 4 and the joint of aluminum conductor, the copper tip 1 are solid copper conductor.Described solid copper is led
Line 1 contains connector 11, and functor 12, and for described aluminum conductor 2 containing core 21 and insulating barrier 22 is led, aluminum conductor is more
Core aluminum conductor (Fig. 4 A) or solid aluminum conductor (Fig. 4 B).The core 21 of leading of aluminum conductor 2 is connected with solid copper conductor 11, aluminum conductor
Lead and also contain spaced metallization 3 between the connector of core and solid copper conductor.
Copper tip is flat solid conductor, and aluminum conductor is solid aluminum conductor or more core aluminum conductors, and specific welding step is as follows：
1) copper tip electroplates spaced metallization (the present embodiment is aluminium) in welding region, and the thickness of spaced metallization is 6 μm.
2) copper tip is put into the mould of ultrasonic welding machine；Aluminum conductor is put into the mould of ultrasonic welding machine,
Stacked with solid copper conductor；
3) start ultrasonic welding machine, after three kinds of metals are compacted by soldering tip, start Vibration Welding.The frequency of described ultrasonic wave
Rate is 15KHZ；Weld amplitude is 80%；The power of device for ultrasonic welding is 12KW；The pressure of wave welding head of ultrasonic wave is 20KN.
The performance impact of the different wall Welded Joints of embodiment 5
Using the copper tip and aluminum conductor of 50 sets of phase same materials and structure, using identical ultrasonic welding machine and frock,
And such as identical welding parameter, thickness of coating (8 μm) and welding method in embodiment 1；Wherein 10 sets are free of any wall；
10 sets are used as spaced metallization using nickel (Ni)；10 sets are used as spaced metallization using zinc (Zn)；10 sets are beaten using nickel (Ni)
Bottom, surface are zinc-plated (Zn)；Remaining 10 sets are used as wall using a kind of anti-corrosion conductive seal agent, test respectively after the completion of welding,
Mechanical property and electrical property contrast before weld decay and after corrosion.
Influence of the different wall of table 1 to pulling capacity (N)
Influence of the different wall of table 2 to voltage drop (mV)
From Tables 1 and 2, using Ni coating or the structure of Zn coating or composite deposite, pulling capacity and voltage drop performance
The structure of sealant is better than used, moreover, after 24 hours salt mist experiments, uses Ni coating or Zn coating or composite deposite
Structure pulling capacity and voltage drop performance reduction amplitude all far smaller than using sealant structure.
Equally understood in Tables 1 and 2, the welding structure of no coating, although at the initial stage of welding, pulling capacity and voltage drop performance
With being approached using Ni coating or the structural behaviour of Zn coating or composite deposite, but after salt mist experiment, due between copper aluminium
In the presence of empty gas and water and salt fog, electrochemical corrosion is both produced, also produces metal erosion, therefore pulling capacity and voltage drop
It can significantly reduce very much, the electricity and mechanical property of copper tip and aluminum conductor joint can not be ensured.
The performance impact of the different spaced metallization fixed form Welded Joints of embodiment 6
Using the copper tip and aluminum conductor of 40 sets of phase same materials and structure, using identical ultrasonic welding machine and frock,
And identical interval metal Zn, identical spaced metallization thickness；Wherein 10 sets will interval gold by the way of by pressure welding
Category Zn is fixed on copper tip；10 sets are fixed on interval metal on copper tip by way of magnetic discharge welding, and 10 sets using plating
Mode be fixed on metal Zn layers are spaced on copper tip, remaining 10 sets will be spaced metal Zn by the way of electric arc spraying and fix
On copper tip, copper tip and aluminum conductor are welded, after the completion of welding, test the corruption of copper tip and aluminum conductor joint respectively
Mechanical property and electrical property contrast before erosion and after corrosion.
The test result of salt air corrosion, voltage drop and pulling capacity is shown in Table 3 and table 4.
Influence of the different spaced metallization fixed form of table 3 to pulling capacity (N)
Influence of the different spaced metallization fixed form of table 4 to voltage drop (mV)
As can be seen that different welding method from table 3 and table 4, after the completion of welding mechanical property and electric property with
Electroplating effect is best, and magnetic discharge welding and electric arc spraying are taken second place, and the effect of pressure welding is poor；In the feelings of four kinds of spaced metallization same thickness
Under condition, the performance comparision in the form of plating to copper tip and aluminum conductor joint protrudes.Moreover, electroplating technology comparative maturity, from
Processing cost and time consider more advantageous.
The performance impact of the different welding region area Welded Joints of embodiment 7
Using the copper tip and aluminum conductor of 120 sets of phase same materials and structure, it is divided into 12 groups, every group 10 sets, uses identical
Ultrasonic welding machine and frock, and identical interval metal Zn, identical interval metal thickness；In identical aluminum conductor and copper
On terminal overlapped region area, different welding region areas is welded, different bonding areas is contrasted and accounts for described aluminum conductor
With the influence of the ratio of copper tip overlapped region area to the electricity and mechanical property of ultrasonic weld joints.
The ratio that bonding area accounts for described aluminum conductor and copper tip overlapped region area is can be seen that from table 5 below data
Example is bigger, and the voltage drop performance and pulling capacity performance of corresponding welding point are better, when ratio is less than 1%, joint
Electric property and mechanical property are decreased obviously, and therefore, the welding region area of the joint is at least described aluminum conductor and copper
The 1% of terminal overlapped region area；Preferably, the welding region area of the joint is at least the aluminum conductor and copper tip
The 10% of overlapped region area.
The different bonding area of table 5 is to voltage drop (mV) and the influence of pulling capacity (N)
| Numbering | Area ratio | Voltage drop (mV) | Pulling capacity (N) |
| 1 | 100% | 3.1 | 2158.4 |
| 2 | 90% | 3.1 | 2013.5 |
| 3 | 80% | 3.2 | 1976.9 |
| 4 | 70% | 3.2 | 1952.6 |
| 5 | 60% | 3.4 | 1916.7 |
| 6 | 50% | 3.4 | 1904.9 |
| 7 | 40% | 3.5 | 1894.2 |
| 8 | 30% | 3.6 | 1861.8 |
| 9 | 20% | 3.6 | 1849.2 |
| 10 | 10% | 3.7 | 1827.5 |
| 11 | 1% | 3.8 | 1817.4 |
| 12 | <1% | 4.2 | 1628.9 |
The performance impact of the thickness Welded Joints of 8 different transition metal layers of embodiment
Using the copper tip and aluminum conductor of 150 sets of materials and structure same as Example 3, it is divided into 15 groups, every group 10 sets, divides
1 μm of zinc coating to 1000 μm of different-thickness is plated with the mode of plating not on copper tip, 1000 μm are fixed with the mode of pressure welding
To 6000 μm of different-thickness zinc as spaced metallization, identical device for ultrasonic welding and frock are reused, by aluminum conductor
It is welded on copper tip, the then pulling capacity of copper-aluminium joint and voltage drop after test welding.
It is can be seen that from the data of table 6 below and table 7 when thickness of coating is more than 5000 μm and less than 3 μm, copper end
The mechanical property and electric property of the joint of son and aluminum conductor are decreased obviously, and therefore, the thickness from spaced metallization is 3 μm
To 5000 μm；It is preferred that when the thickness of spaced metallization is 5 μm to 1000 μm, the power of the joint of copper tip and aluminum conductor
Learn performance and electric property is preferable.
Influence of the different thickness of coating of table 6 to pulling capacity (N)
Influence of the different thickness of coating of table 7 to voltage drop (mV)
Claims (13)
1. the joint of a kind of copper tip and aluminum conductor, described copper tip contains connector, and the function being connected with connector
Part, the core of leading of the aluminum conductor are connected with the connector of copper tip, it is characterised in that described aluminum conductor leads core and copper tip
Connector connected by spaced metallization.
2. the joint of copper tip and aluminum conductor according to claim 1, it is characterised in that described copper tip is flat end
Son, open end, cylinder terminal, or one end of solid copper conductor.
3. the joint of copper tip and aluminum conductor according to claim 1, it is characterised in that described aluminum conductor is led for solid aluminum
Line or more core aluminum conductors.
4. the joint of copper tip and aluminum conductor according to claim 1, it is characterised in that the material that the aluminum conductor leads core is
Aluminium or aluminium alloy.
5. the joint of copper tip and aluminum conductor according to claim 1, it is characterised in that the material of described copper tip is copper
Or copper alloy.
6. the joint of copper tip and aluminum conductor according to claim 1, it is characterised in that described copper tip and aluminum conductor
Joint has welding region, and the welding region area of joint is at least the 1% of aluminum conductor and copper tip overlapped region area.
7. the joint of copper tip and aluminum conductor according to claim 6, it is characterised in that the welding region area of joint is at least
For the 10% of aluminum conductor and copper tip overlapped region area.
8. the joint of copper tip and aluminum conductor according to claim 1, it is characterised in that the thickness of described spaced metallization
For 3 μm to 5000 μm.
9. the joint of copper tip and aluminum conductor according to claim 8, it is characterised in that the thickness of described spaced metallization
For 5 μm to 1000 μm.
10. the joint of copper tip and aluminum conductor according to claim 1, it is characterised in that described spaced metallization material
Electrode potential between copper and the electrode potential of aluminium, it is or equal with the electrode potential of copper or aluminium.
11. the joint of copper tip according to claim 10 and aluminum conductor, it is characterised in that described spaced metallization
Material is one kind in nickel, cadmium, zirconium, chromium, manganese, aluminium, tin, titanium, zinc and cobalt.
12. the joint of copper tip and aluminum conductor according to claim 11, it is characterised in that the material of described spaced metallization
Matter is one kind in aluminium, nickel and zinc.
13. the joint of copper tip and aluminum conductor according to claim 1, it is characterised in that the material of described spaced metallization
Matter is gold or silver or its combination.
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| CN201720645835.1U CN207069080U (en) | 2017-06-05 | 2017-06-05 | A kind of joint of copper tip and aluminum conductor |
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| CN201720645835.1U CN207069080U (en) | 2017-06-05 | 2017-06-05 | A kind of joint of copper tip and aluminum conductor |
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| CN207069080U true CN207069080U (en) | 2018-03-02 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107104292A (en) * | 2017-06-05 | 2017-08-29 | 吉林省中赢高科技有限公司 | A kind of joint and its method for resistance welding of copper tip and aluminum conductor |
| WO2018223954A1 (en) * | 2017-06-05 | 2018-12-13 | 吉林省中赢高科技有限公司 | Joint of copper terminal and aluminium conductor and ultrasonic welding method thereof |
| CN110323594A (en) * | 2018-03-28 | 2019-10-11 | 佛山市顺德区美的电热电器制造有限公司 | Connecting terminal, coil panel and electromagnetic heating cooker |
| WO2021104436A1 (en) * | 2019-11-28 | 2021-06-03 | 比亚迪股份有限公司 | Structure for connecting aluminum cable and terminal, and vehicle having same |
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2017
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107104292A (en) * | 2017-06-05 | 2017-08-29 | 吉林省中赢高科技有限公司 | A kind of joint and its method for resistance welding of copper tip and aluminum conductor |
| WO2018223954A1 (en) * | 2017-06-05 | 2018-12-13 | 吉林省中赢高科技有限公司 | Joint of copper terminal and aluminium conductor and ultrasonic welding method thereof |
| US11355871B2 (en) | 2017-06-05 | 2022-06-07 | Jilin Zhong Ying High Technology Co., Ltd. | Joint of copper terminal and aluminium conductor and ultrasonic welding method hereof |
| CN110323594A (en) * | 2018-03-28 | 2019-10-11 | 佛山市顺德区美的电热电器制造有限公司 | Connecting terminal, coil panel and electromagnetic heating cooker |
| CN110323594B (en) * | 2018-03-28 | 2021-05-28 | 佛山市顺德区美的电热电器制造有限公司 | Binding post, coil panel and electromagnetic heating cooking device |
| WO2021104436A1 (en) * | 2019-11-28 | 2021-06-03 | 比亚迪股份有限公司 | Structure for connecting aluminum cable and terminal, and vehicle having same |
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