CN217984005U - Electric energy transmission connecting device and vehicle - Google Patents
Electric energy transmission connecting device and vehicle Download PDFInfo
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- CN217984005U CN217984005U CN202220552537.9U CN202220552537U CN217984005U CN 217984005 U CN217984005 U CN 217984005U CN 202220552537 U CN202220552537 U CN 202220552537U CN 217984005 U CN217984005 U CN 217984005U
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Abstract
The utility model discloses an electric energy transmission connecting device and vehicle, including at least one electricity connect the skeleton and with the connector that skeleton both ends are connected is connected to the electricity, set up at least one fixed cavity in the connector, the tip of electricity connection skeleton extends and forms terminal structure, terminal structure part at least sets up in the fixed cavity, terminal structure realizes connector electricity connection function. According to the electric energy transmission connecting device disclosed by the invention, the fracture of the terminal structure and the electric connection framework due to vibration can be avoided in the using process, and the stability of the structure between the terminal structure and the electric connection framework is enhanced.
Description
Technical Field
The utility model relates to an automotive electrical apparatus technical field, more specifically relates to an electric energy transmission connecting device and vehicle.
Background
With the increasing popularization of new energy automobiles, equipment and facilities for transmitting electric energy for the new energy automobiles are developed, the connector assemblies on the new energy automobiles have large transmission current due to the requirement of high-power motors, the diameters of high-voltage cables on the connector assemblies are increased, the high-voltage cables can be assembled on automobile bodies only by hand, and the labor cost and the time cost are wasted.
In addition, in the normal use process, the high-voltage cable can flow through very large current, so that the high-voltage cable and the connecting joint can generate a large amount of heat, high temperature can be caused due to excessive heat, the connecting position of the high-voltage cable and peripheral connecting pieces and fixing pieces can be out of work due to high temperature, the normal use of the connector assembly is influenced, short circuit and open circuit are generated, even electric shock hazard is generated, and the life is threatened.
The connecting terminal of the connector assembly is usually connected with the electric connection framework, the contact resistance is very large, and when high-voltage equipment runs for a long time, is overloaded or is short-circuited, the temperature of the connecting part can be rapidly increased to cause accidents. In addition, as the cost of copper terminals is increasing, people are looking for a substitute terminal with lower cost and excellent conductivity.
Therefore, it is a technical problem to be solved in the art to provide an electric energy transmission connection device that can effectively avoid the cost from being too high and prevent the contact resistance between the connection terminal and the electrical connection frame from being too large.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a new technical scheme of power transmission connecting device.
According to the utility model discloses an aspect provides an electric energy transmission connecting device, including at least one electricity connect the skeleton and with the connector that the skeleton both ends are connected is connected to the electricity, set up at least one fixed cavity in the connector, the tip of electricity connection skeleton extends and forms terminal structure, terminal structure at least part sets up in the fixed cavity, terminal structure realizes connector electricity connection function.
Optionally, the terminal structure and the electrical connection backbone have different cross-sectional shapes.
Optionally, the terminal structure and the electrical connection backbone have different cross-sectional areas.
Optionally, the connector is molded on the terminal structure and the electrical connection skeleton.
Optionally, a high-pressure interlock is contained within the connector.
Optionally, the electrically connecting skeleton is at least partially a rigid body, and the tensile strength of the electrically connecting skeleton is greater than 75MPa.
Optionally, the terminal structure is arranged at an angle to the axial direction of the electrical connection framework.
Optionally, an axial included angle between the terminal structure and the electrical connection framework is 0-180 °.
Optionally, at least a part of the surface of the terminal structure is provided with a spacer metal layer, and the material of the spacer metal layer has a thermal expansion coefficient of 1.1 × 10-6/K or more.
Optionally, at least a part of the surface of the terminal structure is provided with a spacing metal layer, and the spacing metal layer contains at least 37wt% of copper-aluminum solid solution.
Optionally, the copper-aluminum solid solution contains a copper-aluminum compound, and the content of the copper-aluminum compound is less than 15wt%.
Optionally, at least a part of the surface of the terminal structure is provided with a spacer metal layer, and the material of the spacer metal layer contains one of gold, silver, nickel, tin, zinc, tin-lead alloy, silver-antimony alloy, palladium-nickel alloy, graphite-silver, graphene-silver, and silver-gold-zirconium alloy.
Optionally, at least a part of the surface of the terminal structure is provided with a spacing metal layer, and the spacing metal layer is arranged on the terminal structure in a manner of electroplating, chemical plating, magnetron sputtering, vacuum plating, welding, attaching, brushing, spraying or pasting.
Optionally, the terminal structure is provided with a groove or a protrusion on a portion close to the electrical connection framework, the inside of the fixing cavity is provided with the protrusion or the groove, and the protrusion and the groove are clamped in a matching manner.
Optionally, a sealing ring is arranged between the protrusion and the groove.
Optionally, the terminal structure is a cylindrical body, and the cross section of the cylindrical body is in one or more of a circular shape, an oval shape, a rectangular shape, a polygonal shape, an a shape, a B shape, a D shape, an M shape, an N shape, an O shape, an S shape, an E shape, an F shape, an H shape, a K shape, an L shape, a T shape, a U shape, a V shape, a W shape, an X shape, a Y shape, a Z shape, a P shape, a semi-arc shape, an arc shape and a wave shape.
Optionally, the terminal structure is a flat belt shape, and a through hole or a threaded hole is arranged on the flat belt shape.
Optionally, the terminal structure includes a flat upper clamp plate and a flat lower clamp plate, and a terminal pair slot is formed between the upper clamp plate and the lower clamp plate.
Optionally, the terminal structure is a cylinder, and the cross section of the inside of the cylinder is in a shape of one or more of a circle, an ellipse, a rectangle, a polygon, an a shape, a B shape, a D shape, an M shape, an N shape, an O shape, an S shape, an E shape, an F shape, an H shape, a K shape, an L shape, a T shape, a U shape, a V shape, a W shape, an X shape, a Y shape, a Z shape, a P shape, a semi-arc shape, an arc shape and a wave shape.
Optionally, an expansion and contraction seam extending along the axial direction is arranged on the cylindrical outer wall, and the expansion and contraction seam divides the terminal structure into elastic pieces.
Optionally, the terminal structure is provided with a chamfer and a round on an end edge angle far away from the electric connection skeleton.
Optionally, the periphery of the electrical connection framework is further sleeved with an insulating layer.
Optionally, the electrical connection framework has at least one bending portion, at least a part of the bending portion includes at least one cavity, and the cavity is located between the inner wall of the insulating layer and the periphery of the electrical connection framework.
Optionally, the shielding layer and the outer insulating layer are sequentially sleeved on the periphery of the insulating layer.
Optionally, a sealing structure is provided between the connector and the insulating layer.
Optionally, a sealing structure is provided between the connector and the outer insulating layer.
Optionally, a shielding inner shell with shielding effectiveness is arranged in the connector, and the shielding inner shell is electrically connected with the shielding layer.
Optionally, the material of the shielding layer and/or the shielding inner shell includes a conductive metal or a conductive plastic.
Optionally, one of the connectors is a cradle.
Optionally, the cross-sectional shape of the electrical connection skeleton is a polygon, and corners of the polygon are all chamfered or rounded.
According to a second aspect of the present invention, there is provided a vehicle comprising an electric energy transmission connection device as described above.
According to this disclosed electric energy transmission connecting device, have following beneficial effect:
1. the terminal structure is formed by extending the end part of the electric connection framework, so that the problem that the terminal structure is broken due to vibration in the using process can be avoided, and the stability of the structure between the terminal structure and the electric connection framework is enhanced. Meanwhile, a connecting structure between the electric connection framework and the terminal structure is cancelled, so that the resistance increase and the voltage drop increase caused by the connecting structure are reduced, the electric energy transmission is more stable, the temperature increase between the electric connection framework and the terminal structure is also reduced, the service lives of the electric connection framework and the terminal structure are prolonged, and the processing cost is reduced.
2. The terminal structure and the electric connection framework are made of aluminum materials, so that the product cost is reduced, the product weight is reduced, and the production procedure is simplified.
3. The problem of at present most heavy current pencil use flexible cable, can't realize automated production and assembly is solved, use the electric connection skeleton of at least part stereoplasm, can realize the automatic assembly and the equipment of pencil.
4. The problem of flexible cable and hull contact friction, lead to the damaged short circuit of insulating layer is solved, the electric connection skeleton can follow the automobile body shape and arrange, but also can have the certain distance with the automobile body, can guarantee not rub with the hull to guarantee the life of electric connection skeleton.
5. The connector is internally provided with the shielding inner shell, so that electromagnetic interference generated by a terminal of the connector can be effectively prevented, the shielding inner shell made of conductive plastic can be integrally formed with the connector in an injection molding mode, the processing time is saved, the production efficiency is improved, and the production cost is reduced.
6. The electric connection framework is also provided with the flexible part and the bent part, so that the structure of the connector assembly can be reasonably designed according to the installation environment of the automobile body, the installation of the connector assembly on the automobile body is easier, and the assembly time is saved.
7. There is the cavity between the flexion of electricity connection skeleton and the insulating layer inner wall, has the air in the cavity, and the heat conduction effect of airtight air is relatively poor, consequently when the flexion of electricity connection skeleton calorific capacity is great, can not influence the insulating layer outside the cavity to the insulating layer of protection flexion can not soften or melt.
8. Because the sealed air is stored in the cavity, the heat insulation effect is achieved, and the heat of the bending part of the electrically connected framework cannot be transferred out of the insulating layer, so that objects with low melting points, such as adhesive tapes and sponges coated with the insulating layer, cannot be heated and melted, and the probability of accidents is reduced.
9. The curved portion of skeleton can expand when the electric connection generates heat in the airtight air that exists in the cavity, nevertheless because the existence of insulating layer can make the pressure in the cavity increase gradually, according to paschen law, the air pressure is big more, and breakdown voltage is high more, consequently can make the withstand voltage breakdown ability of curved portion promote, and electric energy transmission system's security obtains improving.
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 the 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 electric energy transmission connection device of the present invention;
fig. 2 to 7 are schematic axial cross-sectional views of different embodiments of a novel shielding material connector assembly according to the present invention.
FIG. 8 is a schematic structural view of a bending portion of the electrical connection frame of the present invention;
fig. 9 is a schematic structural view of an embodiment of the cavity of the present invention.
The figures are labeled as follows:
1-an electrically connected backbone; 2-a connector; 3-terminal structure; 4-fixing the cavity; 5-sealing ring; 6-sealing structure; 7-through or threaded holes; 8-shielding the inner shell; 9-bulge; 10-a groove; 11-an insulating layer; 12-a shielding layer; 13-an outer insulating layer; 14-upper clamping plate; 15-lower splint; 16-pairs of slots; 17-expansion and shrinkage seaming; 18-an elastic sheet; 19-a bend; 20-cavity.
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: unless specifically stated otherwise, 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.
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.
The utility model discloses an electric energy transmission connecting device, as shown in fig. 1 to 7, including at least one electricity connect skeleton 1 and with connect the connector 2 that skeleton 1 both ends are connected, set up at least one fixed cavity 4 in the connector 2, the tip of electricity connect skeleton 1 extends and forms terminal structure 3, terminal structure 3 at least part sets up in the fixed cavity 4, terminal structure 3 realizes 2 electricity connection function of connector.
In a connector generally used, a cable and a terminal structure 3 are separately machined and molded, and the terminal structure 3 and a conductive part of the cable are welded or connected by crimping to form a connecting structure during assembly, and the mechanical performance of the connecting structure is inferior to that of the cable or the terminal, so that when the connector receives a drawing force, the connecting structure is broken first, and an electric energy transmission connecting device cannot be used. In addition, no matter the mode of welding or crimping, all can have contact resistance between terminal structure 3 and the cable, causes connection structure's resistance to be less than cable or terminal, when switching on heavy current, connection structure is because resistance is less, and it is higher to generate heat, can lead to the connector to take place the burning accident when serious.
During the concrete implementation, through the tip at electric connection skeleton 1 extension form terminal structure 3, can avoid the two because of the vibration fracture in the use, strengthen terminal structure 3 and electric connection skeleton 1 between connection structure's stability. Meanwhile, a connecting structure between the electric connection framework 1 and the terminal structure 3 is cancelled, so that resistance increase and voltage drop increase caused by the connecting structure are reduced, electric energy transmission is more stable, temperature increase between the electric connection framework 1 and the terminal structure 3 is also reduced, the service lives of the electric connection framework 1 and the terminal structure 3 are prolonged, and the processing cost is reduced.
In one embodiment, the terminal structure 3 and the electrical connection frame 1 can be made of aluminum, so as to reduce the product cost, reduce the product weight and simplify the production process.
In an embodiment of the power transmission connection device of the present disclosure, the terminal structure 3 and the electrical connection skeleton 1 have different cross-sectional shapes.
During specific implementation, the cross section shape of the terminal structure 3 can be set to be different from that of the electric connection framework 1 and can be specifically set as required so as to facilitate wiring of the electric connection framework 1 on a vehicle, and the terminal structure 3 is designed to be in a corresponding cross section shape as required so as to facilitate connection of the terminal structure 3 and the plug-in terminal.
In an embodiment of the power transmission connection device of the present disclosure, the terminal structure 3 and the electrical connection skeleton 1 have different cross-sectional areas.
In implementation, the cross-sectional area of the terminal structure 3 may be set to be different from the cross-sectional area of the electrical connection frame 1, and the respective cross-sectional areas may be calculated according to the electrical connection frame 1 and the specific material used for the electrical connection frame 1, so as to satisfy the condition that the terminal structure can be used in a vehicle.
In an embodiment of the power transmission connection device of the present disclosure, the connector 2 is molded on the terminal structure 3 and the electrical connection skeleton 1.
During specific implementation, through with connector 2 shaping terminal structure 3 and connect skeleton 1 on, perhaps, through with connector 2 and terminal structure 3 and connect skeleton 1 integrated into one piece, the stability that skeleton 1 and connector 2 are connected can be connected in multiplicable electricity, increase the life of electric connector assembly.
The connector 2 may be formed by injection molding, extrusion molding, blow molding, foaming, dip molding, 3D printing, or the like.
In an embodiment of the power transmission connection device of the present disclosure, the connector 2 contains a high-voltage interlock structure.
The high-voltage interlocking structure is a safety design method for monitoring the integrity of a high-voltage circuit by using a low-voltage signal, a specific high-voltage interlocking implementation form has different designs for different projects, and the high-voltage interlocking is used for monitoring the accidental disconnection of the high-voltage circuit, so that the damage to an automobile caused by sudden loss of power is avoided.
When the connector is specifically implemented, the connector 2 and the high-pressure interlocking structure are formed in one step through an integrated injection molding mode, so that the assembly time is reduced, and the production efficiency is improved. The high-voltage interlocking structure can ensure the safety of operators in the actual use process, and avoid electric shock occurrence of casualties and property loss when equipment is maintained due to faults.
In an embodiment of the electric energy transmission connection device of the present disclosure, the electrical connection skeleton 1 is at least partially a rigid body, and a tensile strength of the electrical connection skeleton 1 is greater than 75MPa.
The rigid body is an object which has unchanged shape and size and the relative position of each point in the rigid body after being acted on by force during movement. An absolutely rigid body is practically nonexistent and is only an ideal model, because any object deforms to a greater or lesser extent after being subjected to a force, and if the degree of deformation is extremely small relative to the geometric dimensions of the object itself, the deformation is negligible when studying the motion of the object. Therefore, the deformation amount of the electrical connection framework 1 made of the rigid body material is very small and negligible during the use process, and the larger the tensile strength of the rigid body is, the smaller the deformation amount is.
In order to verify the tensile strength of the electric connection framework 1, the tensile force value when the electric connection framework 1 is broken, and the influence on whether abnormal sound occurs in the bending torque and the vibration process of the electric connection framework 1, the inventor selects the electric connection framework 1 sample piece with the same size and specification and different tensile strengths, and tests the torque and the abnormal sound in the vibration process when the electric connection framework 1 is bent.
The method for testing the tension value of the electric connection framework 1 comprises the following steps: and (3) using a universal tensile testing machine, fixing the electrically connected framework 1 at two ends on a stretching jig of the universal tensile testing machine respectively, stretching at the speed of 50 mm/min, and recording the final tensile value when the framework is pulled off, wherein the tensile value is greater than 1600N as a qualified value in the embodiment.
The torque test method of the electric connection framework 1 comprises the following steps: and (3) testing the torque value of the deformation of the electric connection framework 1 in the bending process when the electric connection framework 1 is bent by 90 degrees at the same radius and the same speed by using a torque tester, wherein the torque value is less than 60 N.m as a preferred value in the embodiment.
Whether the abnormal sound can appear on the electric connection framework 1 or not is determined by selecting the electric connection framework 1 with the same size and specification, using the electric connection framework 1 sample pieces with different tensile strengths, assembling the connectors 2 with the same specification together and fixing the connectors on a vibration test table, and observing whether the abnormal sound can appear on the electric connection framework 1 or not in the vibration test process.
Table 1: influence of different tensile strengths on the tension value, torque value and abnormal sound of the electrical connection framework 1
As can be seen from table 1 above, when the tensile strength of the electrical connection frame 1 is less than 75MPa, the tensile force value when the electrical connection frame 1 is broken is less than 1600N, and at this time, the strength of the electrical connection frame 1 itself is not high, and the electrical connection frame 1 is easily broken when receiving a small external force, so that the function failure of the electrical connection frame 1 is caused, and the purpose of power transmission cannot be achieved.
On the other hand, the larger the tensile strength value of the electrical connection frame 1 is, the less the electrical connection frame 1 is likely to deform, so that the less the electrical connection frame 1 is likely to vibrate relative to the connectors 2 connected at both ends to generate abnormal noise in the vibration test process, and conversely, the smaller the tensile strength value of the electrical connection frame 1 is, the more the electrical connection frame 1 is likely to deform, so that the more the electrical connection frame 1 is likely to vibrate relative to the connectors 2 connected at both ends to generate abnormal noise in the vibration test process. As can be seen from table 1 above, when the tensile strength of the electrical connection frame 1 is 75MPa or less, the electrical energy transmission frame 1 may generate abnormal noise during the vibration test. The inventors prefer that the tensile strength of the power transmission backbone 1 is greater than 75MPa.
Meanwhile, as can be seen from table 1, when the tensile strength of the electrical connection bobbin 1 is greater than 480MPa, the torque value when the electrical connection bobbin 1 is bent by 90 ° is greater than 60N · m, and at this time, the electrical connection bobbin 1 does not accommodate the bending, and therefore, the inventors further prefer the tensile strength of the electrical power transmission bobbin 1 to be greater than 75MPa and not greater than 480MPa.
In an embodiment of the electric energy transmission connection device of the present disclosure, the material of the electrical connection frame 1 includes copper, copper alloy, aluminum or aluminum alloy.
During specific implementation, the material of the electrically connected framework 1 is selected according to the use scene and requirements, the electrically connected framework 1 is light in weight when needed, or the cost is required to be reduced, and aluminum or aluminum alloy can be selected. Specifically, the aluminum alloy may be a copper aluminum alloy with an aluminum content of 90%, an aluminum magnesium alloy with an aluminum content of 90%, an aluminum lithium alloy with an aluminum content of 90%, an aluminum zinc alloy with an aluminum content of 90%, or the like. Copper or copper alloys have high electrical conductivity and are resistant to friction, and may be selected where low resistive power consumption is required.
In an embodiment of the electric energy transmission connection device of the present disclosure, the terminal structure 3 and the electrical connection frame 1 are axially disposed at an angle. Connector 2 and electric connection skeleton 1, according to the installation environment of difference, required angle is different, consequently needs terminal structure 3 also to become the angle setting with electric connection skeleton 1 axial direction, can set up to different angle of inflection as required.
Further, the axial included angle between the terminal structure 3 and the electric connection framework 1 is 0-180 degrees.
The implementation is concrete, will terminal structure 3 with the setting of electricity connection skeleton 1 axial angulation can conveniently install terminal structure 3 in the fixed cavity 4 of connector 2, and specific angle according to connector 2 and fixed cavity 4 and the actual position design of on-vehicle battery opposite insertion department, and this angular design can reduce the assembly degree of difficulty, shortens man-hour of processing.
In an embodiment of the disclosed electrical energy transmission connection device, at least a part of the surface of the terminal structure 3 is provided with a spacer metal layer, and the material of the spacer metal layer has a thermal expansion coefficient greater than or equal to 1.1 × 10 -6 /K。
In order to verify the thermal expansion coefficient of the material of the spacing metal layers and the influence on the insertion and extraction force between the terminal structures 3 which are inserted with each other and the inserted terminals, the inventor selects a plurality of groups of terminal structures 3 and inserted terminals which are completely the same in size, and sets spacing metal layers which are the same in specification, thickness and thermal expansion coefficient on the terminal structures 3; in a normal temperature state, the terminal structure 3 and the opposite plug terminal are plugged and unplugged, the plugging force is less than 5N, during the test, one end of the terminal structure 3 or the opposite plug terminal is fixed, and the other end of the terminal structure or the opposite plug terminal is subjected to a plugging and unplugging test by using a tension tester so as to test the plugging and unplugging force between the terminal structure 3 and the opposite plug terminal; in practical application, the terminal structure 3 and the opposite plug terminal are connected into a circuit, and the temperature rises in the using process, so that the temperature of the terminal structure 3 and the opposite plug terminal is raised by 50 ℃ after the terminal structure and the opposite plug terminal are plugged in an experiment, at the moment, the gap between the terminal structure 3 and the opposite plug terminal is reduced by the expansion of the spacing metal layer, and even the interference connection is achieved, so that the terminal structure 3 and the opposite plug terminal are connected more firmly, and the contact resistance is smaller.
Table 2: influence of spacer metal layers of different thermal expansion coefficients on the insertion and extraction force between the terminal structure 3 and the opposite insertion terminal
As can be seen from table 2, the spacer metal layers have a coefficient of thermal expansion of less than 1.1 x 10 -6 The inventors selected the spacer metal layer to have a thermal expansion coefficient of 1.1 x 10 or more, because the terminal structure 3 and the mating terminal are less than 25N, and the spacer metal layer is likely to be separated from each other during use, thereby causing a safety hazard, and thus the use requirement is not satisfied -6 /K。
Furthermore, at least a part of the surface of the terminal structure 3 is provided with a spacer metal layer, and the spacer metal layer contains at least 37wt% of copper-aluminum solid solution.
When the interval metal layer contains less than 37wt% of copper-aluminum solid solution, other components in the interval metal layer are more than or equal to 63wt%. The ratio of the simple substance of copper to the simple substance of aluminum in the spacing metal layer is large, which means that the welding of copper and aluminum is not sufficient, and the simple substance of copper and aluminum is not fused into copper-aluminum solid solution. The copper-aluminum compound in the spacing metal layer has large proportion, the conductivity of the copper-aluminum compound is very poor, the brittleness of the copper-aluminum compound is large, and the mechanical property and the electrical property of the copper-aluminum composite base material can be reduced when the content of the copper-aluminum compound is large. In order to find the proper weight percentage of the copper-aluminum solid solution contained in the spacer metal layer, the inventor performed a related test, and performed a drawing force test and a voltage drop test on the spacer metal layer with different weight percentages of the copper-aluminum solid solution, and if the drawing force of the terminal structure 3 is less than 3000N, the terminal structure is not qualified, and if the voltage drop of the terminal structure 3 is greater than 0.5mV, the result is shown in table 3.
Table 3: the influence of the weight percentage of the copper-aluminum solid solution contained in the spacer metal layer on the drawing force and voltage drop of the terminal structure 3
As can be seen from table 3, when the copper aluminum solid solution contained in the spacer metal layer is less than 37wt%, the terminal structure 3 has a drawing force of less than 3000N, which is unacceptable; meanwhile, the voltage drop of the terminal structure 3 is greater than 0.5mV, which cannot meet the requirements of mechanical property and electrical property of the terminal structure 3. With the increasing of the proportion of copper-aluminum solid solution contained in the spacing metal layer, the mechanical property and the electrical property of the terminal structure 3 are gradually enhanced, so that the spacing metal layer contains not less than 37wt% of copper-aluminum solid solution.
Further, the copper-aluminum solid solution contains a copper-aluminum compound, and the content of the copper-aluminum compound is less than 15wt%.
The copper-aluminum solid solution also contains copper-aluminum compounds, so that in order to avoid the problem that the electric performance of the copper-aluminum solid solution is reduced due to the fact that the proportion of the copper-aluminum compounds in the copper-aluminum solid solution is too large, the inventor carries out related tests, voltage drop tests are carried out on the copper-aluminum solid solutions with different weight percentages of the copper-aluminum compounds, if the voltage drop of the copper-aluminum solid solution is more than 0.5mV, the copper-aluminum solid solution is unqualified, and the results are shown in Table 4.
Table 4: influence of different weight percentages of copper-aluminum compounds on voltage drop of copper-aluminum solid solution
As can be seen from Table 4, when the weight percentage of the copper aluminum compound in the copper aluminum solid solution is greater than 15wt%, the voltage drop of the copper aluminum solid solution is greater than 0.5mV, and the electrical performance requirements cannot be met, so the inventors prefer that the content of the copper aluminum compound in the copper aluminum solid solution is less than 15wt%.
In an embodiment of the electric energy transmission connection device of the present disclosure, at least a part of the surface of the terminal structure 3 is provided with a spacer metal layer, and the material of the spacer metal layer contains one of gold, silver, nickel, tin, zinc, tin-lead alloy, silver-antimony alloy, palladium-nickel alloy, graphite silver, graphene silver, and silver-gold-zirconium alloy.
During concrete implementation, through setting up the interval metal level to improve corrosion resistance, improve electric conductive property, increase the grafting number of times, this terminal structure 3's of extension that can be better life.
In specific implementation, copper, aluminum, copper alloy or aluminum alloy as an active metal will undergo an oxidation reaction with oxygen and water during use, so that one or more inactive metals are required as the spacer metal layer to prolong the service life of the terminal structure 3. In addition, for the metal contact needing frequent plugging, better wear-resistant metal is also needed to be used as the spacing metal layer, so that the service life of the contact can be greatly prolonged. The contact also needs to have good conductivity, and the conductivity and stability of the metal are superior to those of copper or copper alloy, aluminum or aluminum alloy, so that the terminal structure 3 can obtain better electrical performance and longer service life.
In order to demonstrate the influence of different spacer metal layer materials on the overall performance of the terminal structure 3, the inventor uses the same specification and material, adopts terminal structure 3 sample pieces of different spacer metal layer materials, and uses the electric connection framework 1 of the same specification to perform a series of plugging and unplugging times and corrosion resistance time tests. The results of the experiment are shown in table 5 below.
The number of plugging and unplugging times in table 5 is to fix the terminal structures 3 on the experiment table respectively, to make the electrical connection framework 1 simulate plugging and unplugging by using a mechanical device, and to stop to observe the condition that the metal layer at the gap on the surface of the terminal structure 3 is damaged every 100 times of plugging and unplugging, and the surface plating layer of the terminal structure 3 is scratched and the material of the terminal is exposed, so that the experiment is stopped, and the number of plugging and unplugging times at that time is recorded. In this embodiment, the number of plugging times is less than 8000.
The corrosion resistance time test in table 5 is to put the terminal structure 3 into a salt spray test box, spray salt spray to each position of the terminal structure 3, take out and clean every 20 hours to observe the surface corrosion condition, i.e. a period, and stop the test until the surface corrosion area of the terminal structure 3 is greater than 10% of the total area, and record the period number at that time. In this example, the cycle number is less than 80 times considered as failing.
Table 5, effect of different spacer metal layer materials on the number of insertion and extraction times and corrosion resistance of the terminal structure 3:
as can be seen from table 5 above, when the material of the selected spacing metal layer contains gold, silver-antimony alloy, palladium-nickel alloy, graphite-silver, graphene-silver and silver-gold-zirconium alloy, the experimental result exceeds the standard value more, and the performance is more stable. When the selected spacing metal layer material contains nickel, tin-lead alloy and zinc, the experimental result can meet the requirement, so the inventor selects the spacing metal layer material to contain one of gold, silver, nickel, tin-lead alloy, zinc, silver-antimony alloy, palladium-nickel alloy, graphite-silver, graphene-silver and silver-gold-zirconium alloy.
In some embodiments, the spacer metal layer comprises a bottom layer and a surface layer, and the spacer metal layer adopts a multi-layer plating method. After the terminal structure 3 is processed, a plurality of gaps and holes exist under the micro-interface of the real surface, and the gaps and holes are the biggest causes of abrasion and corrosion of the terminal structure 3 in the using process. In this embodiment, a bottom layer is plated on the surface of the terminal structure 3 to fill up gaps and holes on the surface, so that the surface of the terminal structure 3 is flat and has no holes, and then a surface layer is plated to ensure that the surface of the terminal structure 3 is more firmly combined and is also flat, no gaps and holes are formed on the surface of the spacer metal layer, so that the terminal structure 3 has better wear resistance, corrosion resistance and electrical property, and the service life of the terminal structure 3 is greatly prolonged.
Further, at least part of the surface of the terminal structure 3 is provided with an interval metal layer, and the interval metal layer is arranged on the terminal structure 3 in a manner of electroplating, chemical plating, magnetron sputtering, vacuum plating, welding, attaching, brushing, spraying or pasting.
The electroplating method is a process of plating a thin layer of other metals or alloys on the surface of metal by utilizing the electrolysis principle.
The chemical plating method is a deposition process for generating metal through controllable oxidation-reduction reaction under the catalytic action of the metal.
The magnetron sputtering method is characterized in that electrons spirally run near the surface of a target by utilizing the interaction of a magnetic field and an electric field, so that the probability that the electrons collide with argon gas to generate ions is increased, and the generated ions collide with the surface of the target under the action of the electric field so as to sputter out a target material.
The vacuum plating method is to deposit various metal and non-metal films on the surface of the part by distillation, sputtering or other modes under vacuum condition.
Welding, also known as fusion welding, is a manufacturing process and technique for joining metals or other thermoplastic materials, such as plastics, by means of heat, high temperature or high pressure. The energy sources for modern welding are many, including gas flame, electric arc, laser, pressure, resistance heat, electron beam, friction, ultrasonic wave, etc., and in the actual production process, the terminal structure 3 is often provided with the spacer metal layer by using the processes of pasting, brushing, spraying or pasting, etc.
In an embodiment of the electric energy transmission connection device of the present disclosure, as shown in fig. 4 and 5, a groove 10 or a protrusion 9 is disposed on a portion of the terminal structure 3 close to the electrical connection skeleton 1, the protrusion 9 or the groove 10 is disposed inside the fixed cavity 4, and the protrusion 9 and the groove 10 are in matching clamping connection.
During specific implementation, the mutually matched groove 10 and the protrusion 9 can integrally fix the terminal structure 3 and the electric connection framework 1 in the fixed cavity 4, so that the terminal is prevented from vibrating, the connector 2 is prevented from being damaged, and the service life of the electric energy transmission connecting device is prolonged.
Further, as shown in fig. 5, a seal ring 5 is disposed between the protrusion 9 and the groove 10.
In specific implementation, the sealing ring 5 is arranged between the protrusion 9 and the groove 10, so that dust, water and other impurities can be prevented from entering the fixed cavity 4, the connector 2 is prevented from being damaged, meanwhile, the sealing ring 5 also plays a role in damping, and the shell of the fixed cavity 4 is prevented from being damaged due to vibration in the using process of the electric energy transmission connecting device; meanwhile, the insulation function between the terminal structure 3 and the shell of the fixed cavity 4 can be realized.
In an embodiment of the power transmission connection device of the present disclosure, the terminal structure 3 is a cylindrical body, and a cross section of the cylindrical body is in one or more of a circular shape, an oval shape, a rectangular shape, a polygonal shape, an a shape, a B shape, a D shape, an M shape, an N shape, an O shape, an S shape, an E shape, an F shape, an H shape, a K shape, an L shape, a T shape, a U shape, a V shape, a W shape, an X shape, a Y shape, a Z shape, a P shape, a semi-arc shape, an arc shape, and a wave shape.
In specific implementation, the cross-sectional shape of the terminal structure 3 of the cylindrical body can be set as required, or designed according to the structure of the connector 2, so that the adaptability of the terminal structure 3 and the connector 2 is improved.
In an embodiment of the power transmission connection device of the present disclosure, as shown in fig. 3, the terminal structure 3 is a flat belt shape, and a through hole or a threaded hole 7 is disposed on the flat belt shape.
During specific implementation, the opposite plug terminal is provided with corresponding threaded holes or through holes, the terminal structure 3 and the opposite plug terminal are fixedly connected through bolts, and the terminal structure 3 and the opposite plug terminal are prevented from loosening and separating.
In an embodiment of the power transmission connecting device of the present disclosure, as shown in fig. 4, the terminal structure 3 includes a flat upper clamping plate 14 and a flat lower clamping plate 15, and a terminal pair slot 16 is formed between the upper clamping plate 14 and the lower clamping plate 15.
During specific implementation, through being connected slot 16 and charging source or electric vehicle's on-vehicle battery, prevent in the course of the work, because of the two separation of vibration, cause casualties and loss of property, simultaneously, utilize to realize plug, convenient and fast to the slot.
In an embodiment of the power transmission connection device of the present disclosure, the terminal structure 3 is a cylinder, and a cross section of an inside of the cylinder is one or more of circular, oval, rectangular, polygonal, a-shaped, B-shaped, D-shaped, M-shaped, N-shaped, O-shaped, S-shaped, E-shaped, F-shaped, H-shaped, K-shaped, L-shaped, T-shaped, U-shaped, V-shaped, W-shaped, X-shaped, Y-shaped, Z-shaped, P-shaped, semi-arc-shaped, and wave-shaped.
In specific implementation, the cross-sectional shape of the tubular terminal structure 3 and the tubular interior can be set as required, or designed according to the structure of the connector 2 and the cross-sectional shape of the electrical connection framework, so that the adaptability of the terminal structure 3 and the connector 2 is improved.
Further, as shown in fig. 5, an expansion and contraction slit 17 extending in the axial direction is provided on the cylindrical outer wall, and the expansion and contraction slit 17 divides the terminal structure 3 into elastic pieces 18.
In specific implementation, the elastic piece 18 can hold the plug-in terminal plugged in the terminal structure 3 tightly, so as to prevent the plug-in terminal from separating from the terminal structure and not charging the vehicle-mounted battery of the electric vehicle normally.
In an embodiment of the power transmission connection device of the present disclosure, as shown in fig. 2 to 7, a chamfer and a radius are provided on an end edge of the terminal structure 3 away from the electrical connection skeleton 1.
During concrete implementation, the end part of the terminal structure 3 is provided with a chamfer or a radius, so that the plugging and unplugging of the plug terminal can be facilitated, and the guide effect is achieved when the plug terminal and the plug terminal are plugged.
In an embodiment of the present disclosure, as shown in fig. 2 to 5, an insulating layer 11 is further sleeved on the periphery of the electrical connection frame 1. The insulating layer 11 can prevent the electric connection framework 1 from being in contact with other conductive parts to cause short circuit, and the safety of the electric energy transmission connecting device is improved.
Furthermore, the electrical connection framework 1 has at least one bending portion 19, at least a part of the bending portion 19 contains at least one cavity 20, and the cavity 20 is located between the inner wall of the insulating layer 11 and the periphery of the electrical connection framework 1.
In the design process of the electric energy transmission connecting device, the sectional area of the electric connection framework 1 is carefully calculated according to the conduction current, and sufficient allowance can be reserved, so that even if the conduction current of the electric connection framework 1 exceeds the rated current due to unstable voltage and other reasons, the electric connection framework 1 only can generate heat, and the electric connection framework 1 cannot be fused or burnt. However, the insulating layer 11 coated outside the electrical connection framework 1 is made of plastic, the melting temperature is 115 ℃ to 120 ℃, and when the electrical connection framework 1 is installed, objects with low melting points such as adhesive tapes and sponges need to be coated outside the insulating layer 11, and the melting temperature is below 100 ℃, so that when the current of the electrical connection framework 1 is too large and the temperature rises above the standard, the materials such as the insulating layer 11, the adhesive tapes or the sponges on the periphery of the electrical connection framework need to be protected, and the objects which cannot be melted or burnt need to be protected.
There is cavity 20 between the bending portion 19 of electricity connection skeleton 1 and the insulating layer 11 inner wall, and there is air in cavity 20, and the heat conduction effect of airtight air is relatively poor, therefore when the calorific capacity of the bending portion 19 of electricity connection skeleton 1 is great, can not influence the insulating layer 11 outside cavity 20 to the insulating layer 11 of protection bending portion 19 can not soften or melt.
Because the cavity 20 is filled with the sealed air to have a heat insulation effect, the heat of the bending part 19 of the electric connection framework 1 cannot be transferred out of the insulating layer 11, so that objects with low melting points, such as adhesive tapes and sponges, which coat the insulating layer 11, cannot be heated and melted, and the occurrence probability of accidents is reduced.
The closed air in the cavity 20 expands when the bending portion 19 of the electrical connection skeleton 1 generates heat, but the existence of the insulating layer 11 gradually increases the pressure in the cavity 20, and according to paschen's law, the larger the air pressure is, the higher the breakdown voltage is, so that the voltage breakdown resistance of the bending portion 19 is improved, and the safety of the electrical energy transmission connection device is improved.
Further, as shown in fig. 6 and 7, a shielding layer 12 and an outer insulating layer 13 are sequentially sleeved on the periphery of the insulating layer 11.
During specific implementation, the shielding layer 12 is arranged, so that electromagnetic waves generated in the using process of the electric connection framework 1 can be shielded, and the electric connection framework 1 is prevented from interfering other instruments and equipment in the using process. The shielding layer 12 can reduce the interference of the electromagnetic radiation generated by the electric connection framework 1 to other electric devices in the vehicle, and the insulating layer 11 is arranged between the shielding layer 12 and the electric connection framework 1 to prevent the shielding layer 12 and the electric connection framework from contacting because the shielding layer 12 is made of a conductor and needs to be grounded. The outer insulating layer 13 can prevent the shield layer 12 from short-circuiting in contact with the case of the electric vehicle.
Further, as shown in fig. 4, a sealing structure 6 is provided between the connector 2 and the insulating layer 11. The sealing structure 6 can prevent dust, water and other impurities from entering the connector 2 to prevent the connector 2 from being damaged, and meanwhile, the sealing structure 6 also plays a role in damping to prevent the shell of the connector 2 from being damaged due to vibration in the use process of the electric energy transmission connecting device;
further, as shown in fig. 7, a sealing structure 6 is provided between the connector 2 and the outer insulating layer 13.
During the concrete implementation, sealing connection between connector 2 and the electricity connection skeleton 1 can prevent that debris such as water, dust from entering into connector 2, prevents to take place to open circuit between anodal terminal structure 3 in the connector 2 and the negative terminal structure 3, causes casualties and loss of property.
Further, a shielding inner shell 8 with shielding effectiveness is arranged in the connector 2, and the shielding inner shell 8 is electrically connected with the shielding layer 12.
During specific implementation, the arrangement of the shielding inner shell 8 can shield electromagnetic radiation or electromagnetic interference of the terminal structure 3 in a power-on state, and prevent other control systems from being incapable of working normally due to electromagnetic interference.
Furthermore, the material of the shielding layer 12 and/or the shielding inner shell 8 contains conductive metal or conductive plastic.
During the concrete implementation, shielding layer 12 and the material of shielding inner shell 8 contain the conductor to need ground connection, conductive plastic and conductive metal can both be fallen electromagnetic radiation shielding, prevent the interference to other consumer in the car. The conductive plastic can be conductive plastic or conductive rubber, and can be processed in the modes of injection molding, extrusion molding, blow molding, foaming, plastic dipping, 3D printing and the like, the processing technology is simple, and the processing cost is reduced.
In an embodiment of the power transmission connection device according to the present disclosure, the cross-sectional shape of the electrical connection skeleton 1 is a polygon, and corners of the polygon are all chamfered or rounded.
In specific implementation, the corners of the electric connection framework 1 with the polygonal cross section are all chamfered or rounded, so that the electric connection framework 1 and the connecting terminal can be conveniently connected, and when the electric connection framework 1 and the connecting terminal are welded or crimped, the electric connection framework 1 and the connecting terminal are more firmly connected, the contact area is larger, and the conduction current is better; the electric connection framework 1 is prevented from being excessively large in resistance due to the fact that the contact area is excessively small when the electric connection framework is connected with the connecting terminal, and heating and even burning accidents are prevented from happening; and the casualties and the property loss caused by the fact that the edges formed by the two adjacent polygons scratch the insulating layer in the using process can also be prevented.
In an embodiment of the present disclosure, one of the connectors 2 is a charging seat. Along with new energy automobile's more and more popularization, also develop along with it for new energy automobile's equipment and facility that charges, rechargeable battery on the new energy automobile is owing to reach the requirement of filling soon, need use the charging seat assembly, the utility model discloses well one of them connector 2 is the charging seat, connects the rifle that charges, and connector 2 of the other end is high voltage connector, connects rechargeable battery, realizes the purpose that charges for rechargeable battery.
The vehicle of the present disclosure comprises the electric energy transmission connection device.
Although certain specific embodiments of the present invention have been described in detail by way of example, it should be understood by those skilled in the art that the foregoing examples are for purposes of illustration only and are not intended to limit the scope of the 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 (27)
1. The utility model provides an electric energy transmission connecting device, its characterized in that, including at least one electricity connect the skeleton and with the connector that the skeleton both ends are connected is connected to the electricity, set up at least one fixed cavity in the connector, the tip of electricity connection skeleton extends and forms terminal structure, terminal structure at least part sets up in the fixed cavity, terminal structure realizes the function is connected to the connector electricity.
2. The electrical energy transfer connection of claim 1, wherein the terminal structure is different from the cross-sectional shape of the electrical connection backbone.
3. The electrical energy transmission connection of claim 1, wherein the terminal structure and the electrical connection backbone have different cross-sectional areas.
4. The electrical power transmission connection of claim 1, wherein the connector is molded over the terminal structure and the electrical connection backbone.
5. The electrical energy transmission connection of claim 1, wherein a high voltage interlock is included in the connector.
6. The electrical energy transmission connection of claim 1, wherein the electrical connection backbone is at least partially a rigid body, the electrical connection backbone having a tensile strength greater than 75MPa.
7. The electrical power transfer connection of claim 1, wherein the terminal structure is axially angled from the electrical connection backbone.
8. The electrical energy transmission connection of claim 7, wherein the terminal structure is axially angled from 0 ° to 180 ° from the electrical connection backbone.
9. The electrical power transmission connection of claim 1, wherein the terminal structure is provided with spacer metal layers on at least a portion of the surface thereof, the spacer metal layers being made of a material having a coefficient of thermal expansion of 1.1 x 10 or more -6 /K。
10. The electrical energy transmission connection device according to claim 1, wherein a spacer metal layer is disposed on at least a portion of the surface of the terminal structure, and the spacer metal layer is disposed on the terminal structure by electroplating, chemical plating, magnetron sputtering, vacuum plating, welding, attaching, brushing, spraying, or pasting.
11. The electric energy transmission connection device according to claim 1, wherein a groove or a protrusion is formed on a portion, close to the electric connection framework, of the terminal structure, a protrusion or a groove is formed inside the fixing cavity, and the protrusion and the groove are in matched clamping connection.
12. The electrical energy transmission connection of claim 11, wherein a sealing ring is disposed intermediate the projection and the groove.
13. The power transmission connection device according to claim 1, wherein the terminal structure is a cylindrical body, and the cross section of the cylindrical body has one or more of a circular shape, an oval shape, a rectangular shape, a polygonal shape, an A shape, a B shape, a D shape, an M shape, an N shape, an O shape, an S shape, an E shape, an F shape, an H shape, a K shape, an L shape, a T shape, a U shape, a V shape, a W shape, an X shape, a Y shape, a Z shape, a P shape, a semi-arc shape, an arc shape and a wave shape.
14. The electrical energy transmission connection device of claim 1, wherein the terminal structure is a flat strip, and the flat strip is provided with a through hole or a threaded hole.
15. The electrical power transmission connection of claim 1, wherein the terminal structure includes flat upper and lower clamping plates with a terminal pair slot formed therebetween.
16. The power transmission connection device according to claim 1, wherein the terminal structure is a cylinder, and the cross section of the inside of the cylinder is one or more of circular, oval, rectangular, polygonal, A-shaped, B-shaped, D-shaped, M-shaped, N-shaped, O-shaped, S-shaped, E-shaped, F-shaped, H-shaped, K-shaped, L-shaped, T-shaped, U-shaped, V-shaped, W-shaped, X-shaped, Y-shaped, Z-shaped, P-shaped, semi-arc-shaped, arc-shaped and wave-shaped.
17. The electrical energy transmission connection device of claim 16, wherein the cylindrical outer wall is provided with expansion and contraction slits extending in an axial direction, the expansion and contraction slits dividing the terminal structure into the elastic pieces.
18. The electrical power transmission connection of claim 1, wherein the terminal structure is chamfered and rounded at an end corner remote from the electrical connection backbone.
19. The electric energy transmission connection device according to claim 1, wherein an insulating layer is further sleeved on the periphery of the electric connection framework.
20. The electrical power transmission connection of claim 19, wherein the electrical connection backbone has at least one curved portion, at least a portion of the curved portion comprising at least one cavity between an inner wall of the insulating layer and an outer periphery of the electrical connection backbone.
21. The electrical energy transmission connection device of claim 19, wherein the insulation layer is further sleeved with a shielding layer and an outer insulation layer in sequence.
22. The electrical energy transfer connection of claim 19, wherein a seal is provided between the connector and the insulating layer.
23. The power-transfer connection of claim 21, wherein a seal is provided between the connector and the outer insulation layer.
24. The electrical power transmission connection of claim 21, wherein a shielding inner housing having shielding effectiveness is disposed within the connector, the shielding inner housing being electrically connected to the shielding layer.
25. The power transfer connection of claim 1 wherein one of the connectors is a charging cradle.
26. The electrical energy transmission connection device of claim 1, wherein the electrical connection backbone has a cross-sectional shape that is a polygon, the corners of the polygon being fully chamfered or rounded.
27. A vehicle comprising an electrical energy transmission connection according to any one of claims 1 to 26.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202220552537.9U CN217984005U (en) | 2022-03-14 | 2022-03-14 | Electric energy transmission connecting device and vehicle |
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| CN202220552537.9U CN217984005U (en) | 2022-03-14 | 2022-03-14 | Electric energy transmission connecting device and vehicle |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023174247A1 (en) * | 2022-03-14 | 2023-09-21 | 吉林省中赢高科技有限公司 | Electric energy transmission connecting device and vehicle |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023174247A1 (en) * | 2022-03-14 | 2023-09-21 | 吉林省中赢高科技有限公司 | Electric energy transmission connecting device and vehicle |
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