CN218827888U - Corrosion-resistant aluminum wire connecting mechanism - Google Patents
Corrosion-resistant aluminum wire connecting mechanism Download PDFInfo
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- CN218827888U CN218827888U CN202222456586.5U CN202222456586U CN218827888U CN 218827888 U CN218827888 U CN 218827888U CN 202222456586 U CN202222456586 U CN 202222456586U CN 218827888 U CN218827888 U CN 218827888U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract
The invention discloses a corrosion-resistant aluminum wire connecting mechanism which comprises a conductive mechanism and an aluminum cable, wherein the conductive mechanism comprises a functional part and a connecting part which are connected with each other, at least part of the connecting part is connected with a conductive part of the aluminum cable, at least part of the connecting part and the conductive part of the aluminum cable are welded or in pressure welding connection to form a welding area or a pressure welding area, and a sealing layer wraps the periphery of at least part of the welding area or the pressure welding area. The sealing layer is applied to the aluminum wire connecting mechanism, so that a welding area or a crimping area is isolated from the outside, the aluminum wire connecting mechanism is prevented from contacting with outside air and water, the generation of a surface oxidation film is reduced, and the service life of the aluminum wire connecting mechanism is prolonged.
Description
Technical Field
The present invention relates to a connecting device, and more particularly, to a corrosion-resistant aluminum wire connecting mechanism.
Background
At present, the light weight of the cable has become a research hotspot in the technical field of electrical connection. Because in traditional electric connection technical field, the material of binding post and cable conductor is copper or copper alloy, and on the one hand, the exploitation reserve of copper makes the price of copper continuously rise and finally leads to the increase of cable cost, and on the other hand, copper self quality has also restricted the realization of cable lightweight greatly. Therefore, conductive materials such as aluminum and aluminum alloys having a relatively large storage capacity and a relatively light weight are used as cable conductor materials to reduce the weight of cables.
However, aluminum has a strong affinity for oxygen and is easily combined with oxygen in air to form dense and strong AL 2 O 3 Thin films, aluminum oxide films, which can prevent good bonding between metals during soldering of conductive devices. Once chemically corroded, the aluminum surface oxidizes to form nonconductive aluminum oxide, which increases contact resistance and also destroys mechanical strength of the electrical connection between the terminal and the cable conductor. Therefore, in order to avoid the problems of corrosion of the aluminum wire, increase of the contact resistance and decrease of the mechanical strength, it is necessary to provide a product to solve the above problems.
Disclosure of Invention
One object of the present invention is to provide a new solution for a corrosion resistant aluminum wire connection.
According to the invention, the corrosion-resistant aluminum wire connecting mechanism comprises a conductive mechanism and an aluminum cable, wherein the conductive mechanism comprises a functional part and a connecting part which are connected with each other, at least part of the connecting part is connected with the conductive part of the aluminum cable, at least part of the connecting part and the conductive part of the aluminum cable are welded or in compression joint to form a welding area or a compression joint area, and at least part of the periphery of the welding area or the compression joint area is wrapped by a sealing layer.
Preferably, the sealing layer is made of a sealant, and the sealant is one of silicone sealant, polyurethane sealant, polysulfide sealant, acrylic sealant, anaerobic sealant, epoxy sealant, butyl sealant, PVC sealant and asphalt sealant.
Preferably, the sealing layer is made of conductive adhesive, the conductive adhesive comprises a high polymer material and conductive particles, and the conductive particles are made of one of metal, conductive ceramic, a carbon-containing conductor, solid electrolyte and a mixed conductor.
Preferably, the metal is made of one of gold, silver, copper, nickel, titanium, tin, aluminum, cadmium, zirconium, chromium, cobalt, manganese, zinc, phosphorus, tellurium, beryllium, tin-lead alloy, silver-antimony alloy, palladium-nickel alloy or silver-gold-zirconium alloy.
Preferably, the carbon-containing conductor is made of one of graphite silver, graphene silver, graphite powder, a carbon nanotube material and a graphene material.
Preferably, the volume ratio of the conductive particles in the conductive adhesive is 5% -93%.
Preferably, the conductivity of the conductive adhesive is more than 4.8 x 10 6 S/m。
Preferably, the aluminum cable comprises an inner core wire and an outer insulating layer, the core wire is formed by twisting or weaving a plurality of aluminum wires, and the sealing layer penetrates into gaps of the aluminum wires.
Preferably, the aluminium cable comprises an inner core wire and an outer insulating layer, the sealing layer wrapping the welding or crimping zone, the exposed aluminium wires and at least part of the insulating layer.
Preferably, the sealing layer is attached to the connecting portion and at least a part of the outer circumference of the aluminum cable by brushing, dipping or spraying.
Preferably, the aluminum cable comprises an inner core wire and an outer insulating layer, and the temperature resistance grade of the sealing layer is not lower than that of the insulating layer.
The utility model discloses following technological effect has:
the sealing layer is applied to the aluminum wire connecting mechanism, so that a welding area or a crimping area is isolated from the outside, the aluminum wire connecting mechanism is prevented from contacting with outside air and water, the generation of a surface oxidation film is reduced, and the service life of the aluminum wire connecting mechanism is prolonged.
In addition, the sealing layer is made of conductive adhesive and invades into a gap between the aluminum wire and the welding area, so that the conductivity of the aluminum wire can be increased, the resistance can be reduced, and the conductivity of the aluminum wire connecting mechanism can be improved.
Other features of the present invention and advantages thereof will become apparent from the following detailed description of exemplary embodiments of the invention, which proceeds with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description, serve to explain the principles of the invention.
Fig. 1 is a schematic structural view of an embodiment of an aluminum wire connection mechanism of the present invention;
fig. 2 is a schematic structural view of another embodiment of the aluminum wire connection mechanism of the present invention;
FIG. 3 is a schematic view of the welding area between the core wire and the conductive mechanism of the present invention;
fig. 4 is the structural schematic diagram of the aluminum wire connecting mechanism sealing layer wrapped with the guide core of the present invention.
The figures are labeled as follows:
1. a conductive mechanism; 2. an aluminum cable; 3. a sealing layer; 4. a welding area; 21. a core wire; 22. an insulating layer.
Detailed Description
Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless it is specifically stated otherwise.
The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.
Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.
In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.
1-4, including conducting mechanism 1 and aluminium system cable 2, conducting mechanism 1 includes interconnect's functional part and connecting portion, connecting portion at least part interconnects with the conducting part front end of aluminium system cable 2, connecting portion and at least part welding or crimping connection of the conducting part of aluminium system cable 2 form welding region 4 or crimping area, at least part welding region 4 or crimping area periphery parcel sealing layer 3.
The conductive mechanism 1 includes a functional portion and a connecting portion, and the materials of the functional portion and the connecting portion are not limited, and may be all aluminum materials, all copper materials, or one of them.
In one embodiment, the connecting part of the conductive mechanism 1 is a round terminal, the aluminum cable 2 is a round cable, the multi-core wire 21 and the single-core wire 21 can be both, the conductive mechanism 1 and the aluminum cable 2 are butt-welded, at least part of the butt-welded part is a welding area 4, the functional part is electrically connected with an electric device, and the sealing layer 3 wraps the periphery of the welding area 4.
In another embodiment, as shown in fig. 2, the connecting portion of the conductive mechanism 1 is a flat terminal, the aluminum cable 2 is lap-welded or lap-crimped with the conductive mechanism 1, at least a portion of the lap joint is a welding area 4, the functional portion is electrically connected with the electric device, and the sealing layer 3 is wrapped on the periphery of the welding area 4.
In yet another embodiment, as shown in fig. 3, the sealing layer 3 wraps the entire periphery of the conductive means 1 and the soldering region 4 with the sealing layer 3.
The welding area 4 or the crimping area refers to an area where the conductive mechanism 1 and the aluminum cable 2 are welded or crimped together, and specifically, a three-dimensional range where a part of the aluminum wire and a part of the connecting part are welded or crimped together as shown in fig. 3 is formed.
Taking the connecting part as a copper material as an example, the sealing layer 3 is wrapped on the periphery of the welding area 4, and in order to prevent the exposed conductive part from generating chemical corrosion, the sealing layer 3 can seal the conductive part and isolate the conductive part from the atmosphere, so that the conductive part of the aluminum cable 2 can be effectively prevented from forming an oxide layer.
In an embodiment, the specific material of the sealing layer 3 is a sealant, and the sealant is one of silicone sealant, polyurethane sealant, polysulfide sealant, acrylic sealant, anaerobic sealant, epoxy sealant, butyl sealant, PVC sealant, and asphalt sealant.
The sealant can seal the conductive part and isolate the conductive part from the atmosphere, so that oxidation formed by the conductive part of the aluminum cable 2 can be effectively prevented.
Silicone sealant: the paste is prepared by mixing polydimethylsiloxane as a main raw material, a cross-linking agent, a filler, a plasticizer, a coupling agent and a catalyst in a vacuum state.
Polyurethane sealant: the sealant takes polyurethane rubber and polyurethane prepolymer as main components.
Polysulfide sealant: the liquid polysulfide rubber is used as main material, and is matched with tackifying resin, vulcanizing agent, accelerator, reinforcing agent and the like to prepare the sealant.
Acrylic sealant: the acrylic sealant contains methacrylic acid monomer, acrylate copolymer, benzoin propyl ether, alpha-methyl styrene oligomer, activator and the like.
Anaerobic sealant: is a synthetic resin monomer.
Epoxy sealant: the epoxy pouring sealant is an epoxy resin liquid packaging or potting material prepared by taking epoxy resin as a main component, adding various functional auxiliaries and matching with a proper curing agent.
Butyl sealant: the butyl sealant is a single component, and is an environment-friendly non-curing self-adhesive sealant processed by butyl rubber through a special process.
PVC sealant: the paste sealant is composed of polyvinyl chloride paste resin polymerized by an emulsion method or a micro-suspension method, phthalate plasticizer, diluent, tackifier, thixotropic agent, inorganic filler, pigment and the like.
Asphalt sealant: the asphalt cement is prepared from two kinds of asphalt cement, namely petroleum green-based sealing-adhesive two-heat asphalt cement, cold asphalt cement and emulsified asphalt cement.
In one embodiment, the sealing layer 3 is made of a conductive adhesive, the conductive adhesive includes a polymer material and conductive particles, and the conductive particles are made of one or more of metal, conductive ceramic, a carbon-containing conductor, a solid electrolyte and a mixed conductor.
The conductive adhesive has the advantages that the conductive adhesive is convenient to be injection molded, and conductive plastic containing different conductive particles can be selected according to requirements; the sealing layer 3 has a conductive function, and increases the electrical stability of the electrical connection between the connecting part and the two parts of the aluminum cable 2.
The conductive adhesive containing the conductive particles has the conductivity, has the greatest advantages of low cost, simplicity, practicability and wide application range, is the silver conductive adhesive which is most used, and is one of the earliest developed varieties. The mixed conductor refers to a type of conductor in which ionic conduction and electronic conduction exist simultaneously. Also called mixed ion-electron conductor, is a solid material between the ion conductor and the electron conductor, and has both ion conductivity and electron conductivity. The ionic and electronic conductivities of practical mixed conductors are quite high.
In one embodiment, the metal is gold, silver, copper, nickel, titanium, tin, aluminum, cadmium, zirconium, chromium, cobalt, manganese, zinc, phosphorus, tellurium, beryllium, tin-lead alloy, silver-antimony alloy, palladium-nickel alloy, or silver-gold-zirconium alloy.
In some embodiments, the metal is one of gold, silver, copper, nickel, titanium, tin, aluminum, cadmium, zirconium, chromium, cobalt, manganese, zinc, phosphorus, tellurium, beryllium, tin-lead alloy, silver-antimony alloy, palladium-nickel alloy, or silver-gold-zirconium alloy. In order to demonstrate the influence of different metal materials on the conductivity of the aluminum wire connecting mechanism, the inventor conducts a test, samples of the aluminum wire connecting mechanism are made of metal particles with the same specification and size and different materials, the conductivity of the aluminum cable 2 is respectively tested, and the conductivity is more than 99% and can be used as a material of conductive particles.
In order to demonstrate the influence of different metal materials on the conductivity of the conductive adhesive, the inventor performed a test by taking the conductive adhesive as an example, and manufactured sample pieces of the conductive adhesive by using metal particles with the same specification and size and different materials, and respectively tested the conductivity of the conductive adhesive, and the test results are shown in table 1 below.
Table 1: influence of metal particles of different materials on conductivity of conductive adhesive
It can be seen from the above table that the conductivity of the conductive paste made of different metal particles is within the ideal value range, and in addition, phosphorus is a non-metal material and cannot be directly used as a material of the conductive coating, but can be added into other metals to form an alloy, so that the conductivity and mechanical properties of the metal are improved. Therefore, the inventors set the material of the metal particles to be one of gold, silver, copper, nickel, titanium, tin, aluminum, cadmium, zirconium, chromium, cobalt, manganese, zinc, phosphorus, tellurium, beryllium, tin-lead alloy, silver-antimony alloy, palladium-nickel alloy or silver-gold-zirconium alloy.
In one embodiment, the carbon-containing conductor comprises one of graphite silver, graphene silver, graphite powder, carbon nanotube material, graphene material.
The graphite powder is mineral powder, and the main components are carbon simple substance, soft and black gray; graphite powder is a good non-metallic conductive substance. The carbon nano tube has good electric conductivity, and has good electric property because the structure of the carbon nano tube is the same as the lamellar structure of the graphite. The graphene has extremely high electrical properties, and the carbon-containing conductor containing the three materials has high conductivity.
In one embodiment, the volume percentage of the conductive particles in the conductive adhesive is 5% to 93%.
If the volume ratio of the conductive particles in the conductive paste is too small, the conductivity of the sealing layer 3 is insufficient, and an ideal shielding effect cannot be achieved. Therefore, the inventors tested the conductive paint with different volume ratios of the conductive particles, and if the conductivity of the conductive paint is less than 99%, the conductive paint fails, and the test results are shown in table 2.
Table 2: influence of volume fraction of different conductive particles on conductivity of the sealing layer 3
As can be seen from table 2, when the volume proportion of the conductive particles in the sealing layer 3 is less than 5%, the conductivity of the sealing layer 3 is less than 99%, which is not satisfactory, and when the volume proportion of the conductive particles in the conductive paste is greater than 93%, the conductivity is not increased, and the required process requirements are higher, so the inventors prefer that the volume proportion of the conductive particles in the conductive paste is 5% to 93%.
Further, the inventors chose to have a conductivity of greater than 4.8X 10 6 And a sealing layer 3 made of S/m material. The above-mentioned sealing layer 3 having an electric conductivity of more than 99% is acceptable, and the corresponding sealing layer 3 having an electric conductivity of more than 4.8X 10 6 S/m。
In one embodiment, the aluminum cable 2 includes an inner core wire 21 and an outer insulating layer 22, the core wire 21 is formed by twisting or braiding a plurality of aluminum wires, and the sealing layer 3 penetrates into gaps of the aluminum wires.
The core wire 21 is twisted or woven by aluminum wires, so that the core wire 21 is good in flexibility, and the integrity of the aluminum wire combined structural member is strong.
Specifically, heart yearn 21 is many aluminium silk hank system or weave, when guaranteeing better flexibility, can make processing simple to improve the production efficiency of flexible aluminium conductor body, the casing that can laminate the car more can be used in the department of bending suddenly, keeps the stable in shape of cross section.
Specifically, sealing layer 3's material is the conducting resin, with the periphery of conducting resin heating coating to heart yearn 21, when the sinle silk for many aluminium silk hank system or establishment shaping, conductive particle can be deepened and is filled in leading the core gap, will bond between the multifilament, reaches the purpose of keeping apart with the atmosphere, can guarantee the stability of the transmission of electric energy simultaneously.
Furthermore, ultrasonic welding is used as an example, after the conductive core and the connecting part are welded, the conductive adhesive is wrapped on the conductive core and the connecting part in a dip-coating mode, and the design can ensure that gaps after the conductive core and the connecting part are connected are filled, so that good electric connection and sealing are achieved.
In an embodiment, the aluminium cable 2 comprises an inner core wire 21 and an outer insulation layer 22, and the sealing layer 3 covers the welding area 4 or the crimping area, the exposed aluminium wires and at least part of the insulation layer 22.
Further, as shown in fig. 4, after the aluminum cable 2 is electrically connected to the connecting portion, the sealing layer 3 covers all the exposed core wires 21 and covers at least a part of the insulating layer 22, so as to maintain a more perfect sealing performance.
In one embodiment, the sealing layer 3 is attached to the connection portion and at least a part of the outer circumference of the aluminum cable 2 by brushing, dipping or spraying.
The painting is a method of painting the surface of an article by using various paint brush pens to dip paint and form a uniform coating, and is the earliest and most common painting method. The brush coating method has the advantages of almost no equipment fixture investment, coating material saving and no need of a covering process generally.
Dip coating is the process of completely immersing the object to be coated in a tank containing the coating, taking the object out of the tank after a short period of time, and returning the excess coating liquid to the tank. The dip coating has the characteristics of high production efficiency, simple operation and less coating loss.
In the present invention, a dip coating method is preferably used.
In one embodiment, the aluminum cable 2 includes an inner core 21 and an outer insulation layer 22, and the sealing layer 3 has a temperature resistance level not lower than that of the insulation layer 22.
In aluminum wire coupling mechanism's service environment, can have the condition of high temperature, the temperature resistant grade of insulating layer 22, generally can be higher than service environment's temperature grade, when the temperature resistant grade of sealing layer 3 is less than insulating layer 22's temperature resistant grade, can melt under service environment's temperature, lead to the protection inefficacy to aluminum wire coupling mechanism, can't reach the purpose of applying sealing layer 3.
Although some specific embodiments of the present invention have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustrative purposes only and are not intended to limit the scope of the present invention. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the invention. The scope of the invention is defined by the appended claims.
Claims (6)
1. The utility model provides a corrosion-resistant aluminium wire coupling mechanism, includes electrically conductive mechanism and aluminium system cable, its characterized in that, electrically conductive mechanism includes interconnect's functional part and connecting portion, connecting portion at least part and aluminium system cable's conductive part interconnect, connecting portion with at least part welding or crimping of aluminium system cable's conductive part connect and form welding area or crimping area, at least part welding area or crimping area periphery parcel sealing layer.
2. The corrosion-resistant aluminum wire connection mechanism of claim 1, wherein the sealant is a silicone sealant, a polyurethane sealant, a polysulfide sealant, an acrylic sealant, an anaerobic sealant, an epoxy sealant, a butyl sealant, a PVC sealant, or an asphalt sealant.
3. The corrosion-resistant aluminum wire connecting mechanism according to claim 1, wherein the aluminum cable includes an inner core wire and an outer insulating layer, the core wire is formed by twisting or braiding a plurality of aluminum wires, and the sealing layer penetrates into gaps of the aluminum wires.
4. The corrosion-resistant aluminum wire connection of claim 1, wherein the aluminum cable comprises an inner core wire and an outer insulation layer, and the sealing layer covers the welding or crimping zone, the exposed aluminum wire, and at least a portion of the insulation layer.
5. The corrosion-resistant aluminum wire connection mechanism according to claim 1, wherein the sealing layer is attached to at least a part of the outer circumference of the connection portion and the aluminum cable by brushing, dipping, or spraying.
6. The corrosion-resistant aluminum wire connection of claim 1, wherein said aluminum cable comprises an inner core wire and an outer insulation layer, said sealing layer being of a temperature rating not less than the temperature rating of said insulation layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222456586.5U CN218827888U (en) | 2022-09-16 | 2022-09-16 | Corrosion-resistant aluminum wire connecting mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222456586.5U CN218827888U (en) | 2022-09-16 | 2022-09-16 | Corrosion-resistant aluminum wire connecting mechanism |
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| Publication Number | Publication Date |
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| CN218827888U true CN218827888U (en) | 2023-04-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222456586.5U Active CN218827888U (en) | 2022-09-16 | 2022-09-16 | Corrosion-resistant aluminum wire connecting mechanism |
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| CN (1) | CN218827888U (en) |
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- 2022-09-16 CN CN202222456586.5U patent/CN218827888U/en active Active
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