Electrical energy transmission connection device and vehicle

Abstract

The present invention discloses an electric energy transmission connection device including at least one electric connection skeleton and a connector connected to both ends of the electric connection skeleton, at least one fixing cavity is provided in the connector, a terminal structure is extended to an end of the electric connection skeleton, at least a part of the terminal structure is provided in the fixing cavity, and the terminal structure realizes the electric connection function of the connector. The electric energy transmission connection device according to the present disclosure can prevent the two from being broken due to vibration during use, and can improve the stability of the configuration of the terminal structure and the electric connection skeleton.

Description

[Technical field]

[0001] This application claims priority to a Chinese application filed on March 14, 2022, bearing application number 202210250056.7 and entitled "Electric Energy Transmission Connection Device and Vehicle," the disclosure of which is incorporated herein in its entirety.

[0002] The present invention relates to the technical field of car electronics, and in particular to an electric energy transmission connection device and a vehicle. [Background technology]

[0003] As new energy vehicles become more and more popular, the equipment and facilities that transmit electrical energy to new energy vehicles also advance accordingly. In order to meet the requirements of high-power motors, the connector assemblies in new energy vehicles have a relatively large transmission current, and the diameter of the high-voltage cable in the connector assembly also becomes larger accordingly. The assembly to the vehicle body can only be implemented manually, which requires labor and time costs.

[0004] Furthermore, during normal use, a very large current flows through a high-voltage cable, so both the high-voltage cable and the connecting joints will generate a large amount of heat. If the heat is too great, the temperature will rise, and the connection points of the high-voltage cable and the surrounding connecting devices and fasteners will become ineffective due to the high temperature, affecting the normal use of the connector assembly and causing short circuits and disconnections, and ultimately creating a risk of electric shock and endangering life.

[0005] The connection terminals of the connector assembly are usually connected to the electrical connection skeleton, and the contact resistance is very large, so that when the high voltage equipment is operated for a long time, overloaded or short-circuited, the connection points will heat up quickly and cause accidents. In addition, the cost of copper terminals is becoming increasingly high, so there is a demand for alternative individual terminals with lower cost and better electrical conductivity.

[0006] Therefore, it is a technical problem to be solved in the present field to provide an electric energy transmission connection device that can effectively avoid excessive cost and prevent the contact resistance between the connection terminal and the electric connection skeleton from being excessively high. Summary of the Invention

[0007] The present invention aims to provide a new technical solution for an electric energy transmission connection device.

[0008] According to a first aspect of the present invention, there is provided an electric energy transmission connection device including at least one electric connection skeleton and a connector connected to both ends of the electric connection skeleton, at least one fixing cavity is provided in the connector, a terminal structure extends to an end of the electric connection skeleton, at least a portion of the terminal structure is provided in the fixing cavity, and the terminal structure realizes an electrical connection function of the connector.

[0009] Preferably, the cross-sectional shape of the terminal structure is different from that of the electrical connection skeleton.

[0010] Preferably, the cross-sectional area of ​​the terminal structure is different from that of the electrical connection skeleton.

[0011] Preferably, the connector is molded onto the terminal structure and the electrical connection skeleton.

[0012] Preferably, the connector includes a high voltage interlock structure.

[0013] Preferably, at least a portion of the electrical connection skeleton is rigid, the tensile strength of the electrical connection skeleton being greater than 75 MPa.

[0014] Preferably, the terminal structures are angled relative to an axial direction of the electrical connection skeleton.

[0015] Preferably, the angle between the terminal structure and the electrical connecting skeleton in the axial direction is 0° to 180°.

[0016] Preferably, a spacing metal layer is provided on at least a part of the surface of the terminal structure, and the thermal expansion coefficient of the material of the spacing metal layer is 1.1×10 ―6 / K or higher.

[0017] Preferably, a spacing metal layer is provided on at least a portion of the surface of the terminal structure, and the spacing metal layer contains at least 37 wt % of a copper-aluminum solid solution.

[0018] Preferably, the copper aluminum solid solution comprises a copper aluminum compound, and the content of the copper aluminum compound is less than 15 wt %.

[0019] Preferably, a spacing metal layer is provided on at least a portion of the surface of the terminal structure, and the material of the spacing metal layer includes at least one of gold, silver, nickel, tin, zinc, tin-lead alloy, silver-antimony alloy, palladium, palladium-nickel alloy, graphite silver, graphene silver, and silver-gold-zirconium alloy.

[0020] Preferably, a spacing metal layer is provided on at least a portion of the surface of the terminal structure, and the spacing metal layer is provided on the terminal structure by electroplating, electroless plating, magnetron sputtering, vacuum plating, welding, bonding, brush coating, spray coating or bonding.

[0021] Preferably, the terminal structure has a groove or a protrusion in a portion close to the electrical connection skeleton, and the fixing cavity has a protrusion or a groove inside, and the protrusion and the groove are engaged with each other.

[0022] Preferably, a seal ring is provided between the projection and the recessed groove.

[0023] Preferably, the terminal structure is a columnar body, and the cross-sectional shape of the columnar body is 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 wavy shape.

[0024] Preferably, the terminal structure is in the form of a flat string, and a through hole or a screw hole is provided in the flat string.

[0025] Preferably, the terminal structure includes flat upper and lower clamping plates, and a terminal insertion groove is formed between the upper and lower clamping plates.

[0026] Preferably, the terminal structure is cylindrical, and the internal cross-sectional shape of the cylinder is 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 wavy shape.

[0027] Preferably, the cylindrical outer wall is provided with an expansion / contraction slit extending along the axial direction, and the expansion / contraction slit divides the terminal structure into elastic sheets.

[0028] Preferably, the terminal structures are provided with chamfers and rounded corners at their ends remote from the electrical connection skeleton.

[0029] Preferably, the electrical connection skeleton is further coated with an insulating layer on its outer periphery.

[0030] Preferably, the electrical connection skeleton comprises at least one curved portion, at least a portion of the curved portion including at least one cavity, the cavity being located in a space from an inner wall of the insulating layer to an outer periphery of the electrical connection skeleton.

[0031] Preferably, the insulating layer is covered on its outer periphery with a shield layer and an outer insulating layer in that order.

[0032] Preferably, a seal structure is provided between the connector and the insulating layer.

[0033] Preferably, a seal is provided between the connector and the outer insulating layer.

[0034] Preferably, the connector is provided with a shield inner housing having a shielding function, and the shield inner housing is electrically connected to the shield layer.

[0035] Preferably, the material of the shielding layer and / or the shielding inner housing comprises a conductive metal or a conductive plastic.

[0036] Preferably, one of the connectors is a charging inlet.

[0037] Preferably, the cross-sectional shape of the electrical connection skeleton is a polygon, and all corners of the polygon are chamfered or rounded.

[0038] According to a second aspect of the present invention, there is provided a vehicle including an electric energy transmission connection device as described above.

[0039] The electrical energy transmission connection device according to the present disclosure has the following beneficial effects.

[0040] 1. The terminal structure is extended to the end of the electrical connection skeleton, which prevents the two from being broken due to vibration during use, and improves the stability of the configuration of the terminal structure and the electrical connection skeleton. At the same time, the absence of a connection structure between the electrical connection skeleton and the terminal structure reduces the increase in resistance and voltage drop caused by the connection structure, making the transmission of electrical energy more stable, and also reduces the temperature rise between the electrical connection skeleton and the terminal structure, thereby extending the service life of the electrical connection skeleton and the terminal structure and reducing processing costs.

[0041] 2. The terminal structure and electrical connection skeleton are made of aluminum, which reduces product costs, lightens product weight, and simplifies the production process.

[0042] 3. Solves the problem that currently most high-current harnesses use flexible cables, which makes automated production and assembly impossible. By using a rigid one for at least a part of the electrical connection skeleton, it is possible to realize automated assembly and assembly of the harness.

[0043] 4. The problem of insulation layer damage and short circuit caused by friction between the flexible cable and the car housing is solved. The electrical connection skeleton can be arranged according to the shape of the car body, but a certain degree of separation between the car body and the housing is guaranteed not to rub against it, thereby ensuring the service life of the electrical connection skeleton.

[0044] 5. By providing a shielded inner housing inside the connector, it is possible to effectively block electromagnetic interference generated from the connector terminals. By integrally molding the shielded inner housing made of conductive plastic with the connector through integral injection molding, it is possible to save processing time, improve production efficiency, and reduce production costs.

[0045] 6. The electrical connection skeleton is further provided with flexible portions and curved portions, so that the structure of the connector assembly can be adaptively designed according to the installation environment of the vehicle body, making it easier to install the connector assembly on the vehicle body and saving assembly time.

[0046] 7. There is a cavity between the curved part of the electrical connection skeleton and the inner wall of the insulation layer, and there is air in the cavity. Due to the low thermal conduction effect of the sealed air, when the heat generation amount of the curved part of the electrical connection skeleton is large, it will not affect the insulation layer outside the cavity, and protect the insulation layer of the curved part from softening or melting.

[0047] 8. The air in the cavity is sealed, which provides insulation and prevents the heat from the curved parts of the electrical connection skeleton from being transferred to the outside of the insulation layer. This prevents the adhesive cloth, sponge, and other materials with low melting points that cover the insulation layer from melting due to the heat, reducing the probability of accidents.

[0048] 9. The air sealed in the cavity expands when the curved part of the electrical connection skeleton generates heat. Due to the presence of the insulating layer, the pressure in the cavity gradually increases. According to Paschen's law, the higher the air pressure, the higher the breakdown voltage. This improves the electrical breakdown voltage capability of the curved part and improves the safety of the electrical energy transmission system.

[0049] Further features and advantages of the present invention will become apparent from the following detailed description of the preferred embodiments of the present invention and the accompanying drawings.

[0050] The 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. [Brief description of the drawings]

[0051] [Figure 1] 1 is a structural schematic diagram of an electric energy transmission connection device according to the present invention; [Diagram 2] 2A-2C are schematic axial cross-sectional views of different embodiments of a connector assembly of the new shielding material according to the present invention; [Diagram 3] 2A-2C are schematic axial cross-sectional views of different embodiments of a connector assembly of the new shielding material according to the present invention; [Figure 4] 2A-2C are schematic axial cross-sectional views of different embodiments of a connector assembly of the new shielding material according to the present invention; [Diagram 5] 2A-2C are schematic axial cross-sectional views of different embodiments of a connector assembly of the new shielding material according to the present invention; [Figure 6] 2A-2C are schematic axial cross-sectional views of different embodiments of a connector assembly of the new shielding material according to the present invention; [Figure 7]2A-2C are schematic axial cross-sectional views of different embodiments of a connector assembly of the new shielding material according to the present invention; [Figure 8] 4 is a structural schematic diagram of a curved portion of an electrical connection skeleton according to the present invention. FIG. [Figure 9] FIG. 2 is a structural schematic diagram of an embodiment of a cavity according to the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0052] Various embodiments of the present invention will be described in detail below with reference to the drawings. Furthermore, unless otherwise specified, the relative arrangement of components and steps described in these embodiments, numerical expressions, and numerical values ​​do not limit the scope of the invention.

[0053] The following description of at least one exemplary embodiment is for illustrative purposes only and is not intended to limit the invention and its applications or uses.

[0054] Techniques, methods and devices known to those skilled in the art will not be described in detail, but where appropriate, said techniques, methods and devices should be considered as part of the description.

[0055] In all examples shown and discussed herein, any specific values ​​should be construed as merely illustrative and not limiting, and thus other examples of the present embodiments may have different values.

[0056] As shown in Figures 1 to 7, the electric energy transmission connection device of the present disclosure includes at least one electric connection skeleton 1 and a connector 2 connected to both ends of the electric connection skeleton 1, at least one fixing cavity 4 is provided in the connector 2, a terminal structure 3 is extended to an end of the electric connection skeleton 1, at least a portion of the terminal structure 3 is provided in the fixing cavity 4, and the terminal structure 3 realizes the electrical connection function of the connector 2.

[0057] In commonly used connectors, the cable and the terminal structure 3 are processed and molded separately, and during assembly, the terminal structure 3 and the conductive part of the cable are welded or crimped to form the connection structure, and the mechanical properties of the common connection structure are inferior to those of the cable or terminal, so when the connector is subjected to a pull-out force, the connection structure will break first, making the electric energy transmission connection device unusable. In addition, regardless of whether the method is welding or crimping, there is contact resistance between the terminal structure 3 and the cable, so the resistance of the connection structure is smaller than that of the cable or terminal, and when a large current is conducted, the connection structure will generate high heat due to its small resistance, and in serious cases, it will cause a connector combustion accident.

[0058] In a specific implementation, the terminal structure 3 is extended to the end of the electrical connection skeleton 1, which prevents the two from being broken due to vibration during use and improves the stability of the configuration between the terminal structure 3 and the electrical connection skeleton 1. At the same time, the elimination of the connection structure between the electrical connection skeleton 1 and the terminal structure 3 reduces the increase in resistance and voltage drop caused by the connection structure, making the transmission of electrical energy more stable, and also reduces the temperature rise between the electrical connection skeleton 1 and the terminal structure 3, thereby extending the service life of the electrical connection skeleton 1 and the terminal structure 3 and reducing processing costs.

[0059] In one embodiment, the terminal structure 3 and the electrical connection skeleton 1 may be made of aluminum material to reduce product cost, lighten product weight, and simplify the production process.

[0060] In one embodiment of the electrical energy transmission connection device according to the present disclosure, the cross-sectional shape of the terminal structure 3 is different from that of the electrical connection frame 1 .

[0061] When specifically implemented, in order to easily wire the electrical connection skeleton 1 to a vehicle, the cross-sectional shape of the terminal structure 3 is different from that of the electrical connection skeleton 1 so as to be specifically provided as needed, and the terminal structure 3 may be designed to have a cross-sectional shape corresponding to its own needs so as to facilitate connecting the terminal structure 3 to a plug-in terminal.

[0062] In one embodiment of the electrical energy transmission connection device according to the present disclosure, the cross-sectional area of ​​the terminal structure 3 is different from that of the electrical connection skeleton 1 .

[0063] In a specific implementation, the cross-sectional area of ​​the terminal structure 3 may be set to be different from that of the electrical connection skeleton 1, and the respective cross-sectional areas may be calculated based on the electrical connection skeleton 1 and the actual material of the electrical connection skeleton 1 so as to meet the conditions for use in a vehicle.

[0064] In one embodiment of the electrical energy transmission connection device of the present disclosure, the connector 2 is molded onto the terminal structure 3 and the electrical connection skeleton 1 .

[0065] In specific implementation, the connector 2 is molded on the terminal structure 3 and the electrical connection skeleton 1, or the connector 2 is integrally molded with the terminal structure 3 and the electrical connection skeleton 1, thereby improving the stability of the connection between the electrical connection skeleton 1 and the connector 2 and extending the service life of the electrical connector assembly.

[0066] The connector 2 may be molded using injection molding, extrusion molding, blow molding, foam molding, dip molding, 3D printing, or the like.

[0067] In one embodiment of the electrical energy transmission connection device of the present disclosure, the connector 2 includes a high voltage interlock structure.

[0068] The high-voltage interlock structure is a safety design method that uses a low-voltage signal to monitor the integrity of the high-voltage circuit. The specific implementation of the high-voltage interlock adopts different designs for different items, but the high-voltage interlock monitors for unexpected disconnection of the high-voltage circuit and avoids damage to the vehicle due to sudden power loss.

[0069] In concrete implementation, the connector 2 and the high voltage interlock structure are molded in one step by one-piece injection, reducing the assembly man-hours and improving production efficiency. The high voltage interlock structure ensures the safety of operators in the actual use process, and can avoid personal injury and property loss caused by electric shock during equipment failure and maintenance.

[0070] In one embodiment of the electrical energy transmission connection device according to the present disclosure, at least a part of the electrical connection skeleton 1 is rigid, and the tensile strength of the electrical connection skeleton 1 is greater than 75 MPa.

[0071] A rigid body means a body whose shape and size do not change during movement and after being subjected to a force, and whose relative positions of each point inside do not change. An absolutely rigid body does not actually exist, but is merely an ideal model. Any object will deform to some extent after being subjected to a force, and if the degree of deformation is extremely small compared to the geometric dimensions of the object itself, the deformation can be ignored when considering the movement of the object. Therefore, the electrical connection skeleton 1 made of a rigid material will experience a negligible amount of deformation during use, and the greater the tensile strength of the rigid body, the smaller the amount of deformation.

[0072] In order to verify the tensile strength of the electrical connection skeleton 1, the tensile force value when the electrical connection skeleton 1 breaks, the torque at which the electrical connection skeleton 1 is bent, and the influence on whether or not abnormal noise occurs during vibration, the inventors use samples of electrical connection skeletons 1 that have the same dimensional specifications but different tensile strengths to test the torque at which the electrical connection skeleton 1 is bent and the abnormal noise during vibration.

[0073] Test method for the tensile force value of the electrical connection skeleton 1: Using a universal tensile testing machine, fix both ends of the electrical connection skeleton 1 to the tensile fixture of the universal tensile testing machine, and pull at a speed of 50 mm / min. Record the tensile force value at the time of final breakage. In this embodiment, a tensile force value of more than 1600 N is considered to be passable.

[0074] Torque test method for electrical connection skeleton 1: Using a torque testing machine, when electrical connection skeletons 1 of the same radius are bent 90° at the same speed, the torque value at which electrical connection skeleton 1 deforms during the bending process is tested. In this embodiment, a torque value of less than 60 N·m is the preferred value.

[0075] Regarding whether or not abnormal noise occurs in the electrical connection skeleton 1, the test method is to assemble samples of the electrical connection skeleton 1 having the same dimensional specifications but different tensile strengths and connectors 2 of the same specifications together and fix them to a vibration test stand, and observe whether or not abnormal noise occurs in the electrical connection skeleton 1 during the vibration test.

[0076] Table 1: Effect of different tensile strengths on the tensile force, torque and noise of electrical connection skeleton 1 [Table 1]

[0077] As can be seen from Table 1 above, when the tensile strength of the electrical connection skeleton 1 is less than 75 MPa, the tensile force value when the electrical connection skeleton 1 breaks is less than 1600 N. In this case, the strength of the electrical connection skeleton 1 itself is not high, and even when subjected to a small external force, it is easily broken, the function of the electrical connection skeleton 1 becomes invalid, and the purpose of transmitting electrical energy cannot be achieved.

[0078] On the other hand, if the tensile strength value of the electrical connection skeleton 1 is large, the electrical connection skeleton 1 is less likely to deform, and therefore the electrical connection skeleton 1 is less likely to vibrate relative to the connectors 2 connected to both ends and generate abnormal noise during the vibration test, and conversely, if the tensile strength value of the electrical connection skeleton 1 is small, the electrical connection skeleton 1 is more likely to deform, and therefore the electrical connection skeleton 1 is more likely to vibrate relative to the connectors 2 connected to both ends and generate abnormal noise during the vibration test. As can be seen from Table 1 above, if the tensile strength of the electrical connection skeleton 1 is 75 MPa or less, the electrical connection skeleton 1 generates abnormal noise during the vibration test. Therefore, it is preferable that the tensile strength of the electrical connection skeleton 1 is greater than 75 MPa.

[0079] At the same time, as can be seen from Table 1, if the tensile strength of the electrical connection skeleton 1 is greater than 480 MPa, the torque value when the electrical connection skeleton 1 is bent 90° is greater than 60 N·m, in which case the electrical connection skeleton 1 becomes difficult to bend, so it is more preferable that the tensile strength of the electrical connection skeleton 1 is greater than 75 MPa and equal to or less than 480 MPa.In one embodiment of the electrical energy transmission connection device according to the present disclosure, the material of the electrical connection skeleton 1 includes copper or a copper alloy, or aluminum or an aluminum alloy.

[0080] In concrete implementation, the material of the electrical connection skeleton 1 is selected according to the usage scene and requirements. When the electrical connection skeleton 1 needs to be lightweight or needs to be cost-reduced, aluminum or an aluminum alloy may be selected. Specifically, the material 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%, etc. Copper or a copper alloy may be selected when high conductivity, friction resistance, and low resistance are required.

[0081] In one embodiment of the electric energy transmission connection device according to the present disclosure, the terminal structure 3 is angled with respect to the axial direction of the electric connection skeleton 1. Since the connector 2 and the electric connection skeleton 1 require different angles according to different installation environments, the terminal structure 3 also needs to be angled with respect to the axial direction of the electric connection skeleton 1, and may be provided at different bending angles as required.

[0082] Furthermore, the angle between the terminal structure 3 and the electrical connecting skeleton 1 in the axial direction is 0° to 180°.

[0083] In a specific embodiment, the angle between the axial direction of the terminal structure 3 and the electrical connection skeleton 1 is set so that the terminal structure 3 can be easily attached to the fixing cavity 4 in the connector 2, and the specific angle is set based on the actual positions of the connector 2, the fixing cavity 4, and the insertion point of the vehicle battery. By setting this angle, the difficulty of assembly can be reduced and the processing labor can be shortened.

[0084] In one embodiment of the electric energy transmission connection device according to the present disclosure, a spacing metal layer is provided on at least a part of the surface of the terminal structure 3, and the thermal expansion coefficient of the material of the spacing metal layer is 1.1×10 ―6 / K or higher.

[0085] In order to verify the effect of the thermal expansion coefficient of the material of the spacer metal layer on the insertion and removal force between the terminal structure 3 and the plug-in terminal which are inserted into each other, the inventors used multiple sets of terminal structures 3 and plug-in terminals with exactly the same dimensions, and each of the terminal structures 3 was provided with a spacer metal layer with the same specification, thickness and different thermal expansion coefficient. At room temperature, the insertion and removal force between the terminal structure 3 and the plug-in terminal must be less than 5N. During the test, one end of the terminal structure 3 or the plug-in terminal was fixed, and a tensile tester was used to perform an insertion and removal test on the other end, thereby testing the insertion and removal force between the terminal structure 3 and the plug-in terminal, and the actual insertion and removal force was tested. In the application of the present invention, the terminal structure 3 and the plug-in terminal are connected to a circuit, and the temperature will rise during use. Therefore, in a test, the inventors heated the terminal structure 3 and the plug-in terminal by 50°C after insertion. At this time, the spacing metal layer expands, reducing the gap between the terminal structure 3 and the plug-in terminal, and even achieving a tight fit, making the connection between the terminal structure 3 and the plug-in terminal stronger and the contact resistance smaller. In this embodiment, the passing value is an insertion / withdrawal force of 25N or more, and it can be seen that the connection between the terminal structure 3 and the plug-in terminal is strong and not easily separated from each other.

[0086] Table 2: Effect of spacing metal layers with different thermal expansion coefficients on the insertion and removal forces between terminal structure 3 and plug-in terminals [Table 2]

[0087] As can be seen from Table 2, the thermal expansion coefficient of the spacer metal layer is 1.1*10 -6 / K, and the insertion and withdrawal force between the terminal structure 3 and the plug-in terminal is less than 25N. In this case, the two are easily separated during use, which causes a safety problem and does not meet the usage requirements. Therefore, the inventors have determined that the thermal expansion coefficient of the spacer metal layer is 1.1*10 -6 Make sure it is greater than or equal to / K.

[0088] Furthermore, a spacing metal layer is provided on at least a portion of the surface of the terminal structure 3, and the spacing metal layer contains at least 37 wt % of a copper-aluminum solid solution.

[0089] When the spacing metal layer contains less than 37 wt% of copper-aluminum solid solution, the other components in the spacing metal layer are 63 wt% or more. The high proportion of copper and aluminum in the spacing metal layer means that the welding of copper and aluminum is insufficient, and the copper-aluminum element is not fused to the copper-aluminum solid solution. The high proportion of copper-aluminum compounds in the spacing metal layer leads to poor electrical conductivity of the copper-aluminum compounds and high brittleness of the copper-aluminum compounds, so that a high content will reduce the mechanical and electrical performance of the copper-aluminum composite substrate. The inventors conducted relevant tests to find the appropriate weight percentage of copper-aluminum solid solution contained in the spacing metal layer, and conducted pull-out force tests and voltage drop tests on spacing metal layers with different weight percentages of copper-aluminum solid solution contained therein. If the pull-out force of the terminal structure 3 is less than 3000N, it is rejected, and if the voltage drop of the terminal structure 3 is more than 0.5mV, it is rejected. The results are shown in Table 3.

[0090] Table 3: Effect of weight percentage of copper-aluminum solid solution in the spacing metal layer on pull-out force and voltage drop of terminal structure 3 [Table 3]

[0091] As can be seen from Table 3, when the copper-aluminum solid solution contained in the spacing metal layer is less than 37 wt%, the pull-out force of the terminal structure 3 is less than 3000 N, which is unacceptable, and at the same time, the voltage drop of the terminal structure 3 is more than 0.5 mV, which fails to meet the mechanical and electrical performance requirements of the terminal structure 3. As the proportion of copper-aluminum solid solution contained in the spacing metal layer gradually increases, the mechanical and electrical performance of the terminal structure 3 gradually improves, so the spacing metal layer needs to contain copper-aluminum solid solution of 37 wt% or more.

[0092] Furthermore, the copper aluminum solid solution includes a copper aluminum compound, and the content of the copper aluminum compound is less than 15 wt %.

[0093] The copper aluminum solid solution also contains copper aluminum compounds. In order to prevent the copper aluminum solid solution from having a large proportion of copper aluminum compounds, which may cause a decrease in the electrical performance of the copper aluminum solid solution, the inventors carried out a related test and carried out a voltage drop test on copper aluminum solid solutions with different weight percentages of copper aluminum compounds. If the voltage drop of the copper aluminum solid solution is more than 0.5mV, it is rejected. The results are shown in Table 4.

[0094] Table 4: Effect of different weight percentages of copper aluminide on the voltage drop of copper aluminide solid solutions [Table 4]

[0095] As can be seen from Table 4, if the weight percentage of the copper aluminum compound in the copper aluminum solid solution is greater than 15 wt%, the voltage drop of the copper aluminum solid solution is greater than 0.5 mV, which cannot meet the electrical performance requirements. Therefore, it is preferable that the content of the copper aluminum compound in the copper aluminum solid solution is less than 15 wt%.

[0096] In one embodiment of the electrical energy transmission connection device of the present disclosure, a spacing metal layer is provided on at least a portion of the surface of the terminal structure 3, and the material of the spacing metal layer includes one or more of gold, silver, nickel, tin, zinc, tin-lead alloy, silver-antimony alloy, palladium, palladium-nickel alloy, graphite silver, graphene silver, and silver-gold-zirconium alloy.

[0097] In specific implementation, the provision of the spacing metal layer can improve corrosion resistance, improve conductive performance, increase the number of times that the terminal structure 3 can be inserted, and better extend the service life of the terminal structure 3.

[0098] In concrete implementation, copper, aluminum, copper alloy or aluminum alloy are active metals that undergo oxidation reaction with oxygen gas and water during use, so at least one inactive metal must be used as the spacing metal layer to extend the service life of the terminal structure 3. In addition, for metal contacts that need to be constantly inserted and removed, a metal with good wear resistance must be used as the spacing metal layer, which can greatly extend the service life of the contacts. In addition, the contacts must have good electrical conductivity, and the conductivity and stability of the above metals are superior to those of copper or copper alloy, aluminum or aluminum alloy, which can provide the terminal structure 3 with better electrical performance and longer service life.

[0099] In order to verify the effect of different materials of the spacing metal layer on the overall performance of the terminal structure 3, the inventor uses samples of terminal structures 3 with the same specifications and materials but different materials of the spacing metal layer to carry out a series of insertion / removal cycles and corrosion resistance time tests using electrical connection skeletons 1 of the same specifications, and selects tin, nickel and zinc as the materials of the spacing metal layer in the experiments to prove the advantages and disadvantages of the selected materials and other commonly used spacing metal layer materials. The experimental results are shown in Table 5 below.

[0100] For the number of insertions and removals in Table 5, the terminal structures 3 were fixed to a test bench, and the electrical connection skeleton 1 was simulated to be inserted and removed by a mechanical device, and the experiment was stopped every 100 insertions and removals to observe whether the spacing metal layer on the surface of the terminal structure 3 was destroyed. When the plating layer on the surface of the terminal structure 3 was scratched and the material of the terminal itself was exposed, the experiment was stopped and the number of insertions and removals at that time was recorded. In this example, a number of insertions and removals less than 8,000 was considered to be a failure.

[0101] For the corrosion resistance time test in Table 5, the terminal structure 3 is placed in a salt spray test box and salt spray is sprayed at each position of the terminal structure 3. The terminal structure 3 is taken out every 20 hours, washed, and the corrosion condition of the surface is observed. The test is stopped when the corroded area of ​​the surface of the terminal structure 3 becomes larger than 10% of the total area, and the number of cycles at that time is recorded. In this embodiment, a number of cycles less than 80 times is considered to be a failure.

[0102] Table 5: Effect of different materials of the spacer metal layer on the number of insertions and removals and corrosion resistance of terminal structure 3 [Table 5]

[0103] As can be seen from Table 5 above, when the material of the spacing metal layer includes gold, silver, silver-antimony alloy, palladium, palladium-nickel alloy, graphite silver, graphene silver, and silver-gold-zirconium alloy, the experimental results exceed the standard value more than necessary, and the performance is relatively stable. When the material of the spacing metal layer includes nickel, tin, tin-lead alloy, and zinc, the experimental results can also meet the requirements, so the inventors select the material of the spacing metal layer to include one or more of gold, silver, nickel, tin, tin-lead alloy, zinc, silver-antimony alloy, palladium, palladium-nickel alloy, graphite silver, graphene silver, and silver-gold-zirconium alloy.

[0104] In some embodiments, the spacing metal layer includes a base layer and a surface layer, and the spacing metal layer is formed by a multi-layer plating method. After the terminal structure 3 is processed, there are still many gaps and holes at the micro-interfaces on its surface, and these gaps and holes are the biggest cause of wear and corrosion during the use of the terminal structure 3. In this embodiment, the surface of the terminal structure 3 is first plated with a layer of base layer to fill the gaps and holes on the surface and make the surface of the terminal structure 3 flat and free of holes, and then the surface layer is plated to be more firmly bonded and more flat, and the surface of the spacing metal layer is free of gaps and holes, so that the wear resistance, corrosion resistance and electrical performance of the terminal structure 3 are better, and the service life of the terminal structure 3 is greatly extended.

[0105] Furthermore, a spacing metal layer is provided on at least a portion of the surface of the terminal structure 3, and the spacing metal layer is provided on the terminal structure 3 by electroplating, electroless plating, magnetron sputtering, vacuum plating, welding, bonding, brush coating, spray coating or bonding.

[0106] Electroplating is a process whereby a metal surface is plated with a thin layer of another metal or alloy by electrolytic principles.

[0107] The electroless plating method is a process in which metal deposition occurs through a controllable oxidation-reduction reaction under the catalytic action of the metal.

[0108] In magnetron sputtering, the interaction of a magnetic field and an electric field causes electrons to move in a spiral pattern near the target surface, increasing the probability that the electrons will collide with argon gas and generate ions, and the generated ions collide with the target surface due to the action of the electric field, thereby sputtering the target.

[0109] Vacuum plating is a method for depositing various metallic and non-metallic thin films on the surface of a part by evaporation or sputtering under vacuum conditions.

[0110] Welding, also known as fusing, is a manufacturing process and technique that uses heat, high temperature or pressure to join metals or other thermoplastic materials such as plastics. Modern welding energy sources are varied, including gas flame, arc, laser, pressure, resistance heat, electron beam, friction and ultrasonic, etc. In actual production, a spacer metal layer is often applied to the terminal structure 3 by processes such as gluing, brushing, spraying or bonding.

[0111] In one embodiment of the electrical energy transmission connection device of the present disclosure, as shown in Figures 4 and 5, the terminal structure 3 has a groove 10 or a protrusion 9 in a portion close to the electrical connection skeleton 1, and a protrusion 9 or a groove 10 is provided inside the fixed cavity 4, and the protrusion 9 and the groove 10 are engaged with each other.

[0112] In specific implementation, the interlocking grooves 10 and protrusions 9 fix the terminal structure 3 and the entire electrical connection skeleton 1 within the fixing cavity 4, thereby preventing damage to the connector 2 caused by vibration of the terminals and extending the service life of the electrical energy transmission connection device.

[0113] Furthermore, as shown in FIG. 5, a seal ring 5 is provided between the projection 9 and the recessed groove 10 .

[0114] In a specific implementation, a sealing ring 5 is provided between the protrusion 9 and the groove 10 to prevent foreign matter such as dust and water from entering the fixed cavity 4 and to prevent the connector 2 from being damaged. The sealing ring 5 also has a shock absorbing effect to prevent the housing of the fixed cavity 4 from being damaged due to vibration during use of the electric energy transmission connection device, and at the same time, can also provide an insulating effect between the terminal structure 3 and the housing of the fixed cavity 4.

[0115] In one embodiment of the electric energy transmission connection device according to the present disclosure, the terminal structure 3 is a columnar body, and the cross-sectional shape of the columnar body is 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 half-arc shape, an arc shape, and a wavy shape.

[0116] In specific implementation, the cross-sectional shape of the columnar terminal structure 3 may be provided as needed or may be designed according to the structure of the connector 2, thereby improving the compatibility between the terminal structure 3 and the connector 2.

[0117] In one embodiment of the electric energy transmission connection device according to the present disclosure, the terminal structure 3 is flat-string shaped, and a through hole or screw hole 7 is provided in the flat-string shaped, as shown in FIG.

[0118] When specifically implemented, a screw hole or through hole corresponding to the plug-in terminal is provided, and the terminal structure 3 and the plug-in terminal are fastened with a bolt, thereby preventing loosening between the terminal structure 3 and the plug-in terminal.

[0119] In one embodiment of the electrical energy transmission connection device according to the present disclosure, the terminal structure 3 includes a flat upper clamping plate 14 and a flat lower clamping plate 15, as shown in FIG. 4, and a terminal insertion groove 16 is formed between the upper clamping plate 14 and the lower clamping plate 15.

[0120] In concrete terms, when put into practice, the insertion groove 16 is connected to a charging power source or the onboard battery of an electric vehicle, thereby preventing personal injury or property loss caused by the two being separated due to vibration during operation, and the insertion groove makes insertion and removal convenient and quick.

[0121] In one embodiment of the electric energy transmission connection device according to the present disclosure, the terminal structure 3 is cylindrical, and the cross-sectional shape of the inside of the cylinder is 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 wavy shape.

[0122] In specific implementation, the tubular terminal structure 3 may have an internal tubular cross-sectional shape as required, or may be designed according to the structure of the connector 2 and the cross-sectional shape of the electrical connection skeleton, thereby improving the compatibility between the terminal structure 3 and the connector 2.

[0123] Furthermore, as shown in FIG. 5, the cylindrical outer wall is provided with an expansion / contraction slit 17 extending along the axial direction, and the expansion / contraction slit 17 divides the terminal structure 3 into elastic sheets 18.

[0124] In concrete practice, the elastic sheet 18 holds the plug-in terminal engaged with the terminal structure 3, thereby preventing the inability to normally charge the on-board battery of the electric vehicle due to separation of the two.

[0125] In one embodiment of the electric energy transmission connection device according to the present disclosure, as shown in Figs. 2 to 7, the corners of the end of the terminal structure 3 remote from the electric connection skeleton 1 are chamfered and rounded.

[0126] In concrete terms, the ends of the terminal structure 3 are chamfered and rounded, which facilitates insertion and removal from the plug-in terminal and acts as a guide when inserting and removing the two.

[0127] In one embodiment of the electric energy transmission connection device according to the present disclosure, as shown in Figures 2 to 5, an insulating layer 11 is further provided on the outer periphery of the electric connection skeleton 1. The insulating layer 11 can prevent a short circuit caused by contact between the electric connection skeleton 1 and other conductive members, and can improve the safety of the electric energy transmission connection device.

[0128] Furthermore, as shown in Figures 8 and 9, the electrical connection skeleton 1 has at least one curved portion 19, and at least a portion of the curved portion 19 includes at least one cavity 20, which is located in the space from the inner wall of the insulating layer 11 to the outer periphery of the electrical connection skeleton 1.

[0129] In the design process of the electric energy transmission connection device, the cross-sectional area of ​​the electric connection skeleton 1 must be precisely calculated based on the current flowing, and must have a sufficient margin, so that even if the current flowing through the electric connection skeleton 1 exceeds the rated current due to voltage instability or the like, the electric connection skeleton 1 will only generate heat, and will not melt or burn the electric connection skeleton 1. However, the insulating layer 11 covering the outer periphery of the electric connection skeleton 1 is made of a plastic material, and its melting temperature is 115°C to 120°C, and when the electric connection skeleton 1 is attached, it is necessary to cover the outside of the insulating layer 11 with an object having a low melting point, such as adhesive cloth or sponge, and the melting temperature of this is below 100°C, so that the electric connection skeleton 1 must protect the insulating layer 11, adhesive cloth, sponge, and other materials on the outer periphery from melting or burning when the current is too large and the temperature rises to exceed the reference temperature.

[0130] There is a cavity 20 between the curved portion 19 of the electrical connection skeleton 1 and the inner wall of the insulating layer 11, and there is air inside the cavity 20. Since the thermal conduction effect of enclosed air is low, even if the amount of heat generated by the curved portion 19 of the electrical connection skeleton 1 is large, it does not affect the insulating layer 11 outside the cavity 20, and protects the insulating layer 11 of the curved portion 19 from softening or melting.

[0131] Since there is sealed air inside the cavity 20, it has a heat insulating effect, the heat of the curved portion 19 of the electrical connection skeleton 1 is not transferred to the outside of the insulating layer 11, and the adhesive cloth, sponge, and other materials with low melting points that cover the insulating layer 11 do not melt due to the heat, thereby reducing the probability of accidents occurring.

[0132] The enclosed air in the cavity 20 expands when the curved portion 19 of the electrical connection skeleton 1 generates heat, but due to the presence of the insulating layer 11, the pressure in the cavity 20 gradually increases. According to Paschen's law, the higher the air pressure, the higher the breakdown voltage. Therefore, the voltage breakdown capability of the curved portion 19 is improved, and the safety of the electrical energy transmission connection device is improved.

[0133] Furthermore, the outer periphery of the insulating layer 11 is covered with a shield layer 12 and an outer insulating layer 13 in this order, as shown in FIGS.

[0134] In concrete implementation, the provision of the shielding layer 12 can shield electromagnetic waves generated by the electrical connection skeleton 1 during use, and can prevent the electrical connection skeleton 1 from interfering with other devices and equipment during use. The shielding layer 12 can reduce interference with other electrical devices in the vehicle due to electromagnetic radiation generated by the electrical connection skeleton 1, and since the material of the shielding layer 12 is a conductor and needs to be grounded, the insulating layer 11 is provided between the shielding layer 12 and the electrical connection skeleton 1 to prevent contact between them. The outer insulating layer 13 can prevent a short circuit due to contact between the shielding layer 12 and the housing of the electric vehicle.

[0135] 4, a seal structure 6 is provided between the connector 2 and the insulating layer 11. The seal structure 6 prevents foreign matter such as dust and water from entering the connector 2 and thus prevents the connector 2 from being damaged. The seal structure 6 also serves to absorb shock, thereby preventing the housing of the connector 2 from being damaged by vibration during use of the electric energy transmission connection device.

[0136] Furthermore, as shown in FIG. 7, a seal structure 6 is provided between the connector 2 and the outer insulating layer 13.

[0137] When specifically implemented, a sealed connection is formed between the connector 2 and the electrical connection skeleton 1, preventing foreign matter such as water and dust from entering the connector 2 and preventing personal injury and property loss caused by a disconnection between the positive terminal structure 3 and the negative terminal structure 3 in the connector 2.

[0138] Furthermore, a shield inner housing 8 having a shielding function is provided within the connector 2 , and the shield inner housing 8 is electrically connected to the shield layer 12 .

[0139] When specifically implemented, the installation of the shielded inner housing 8 can block electromagnetic radiation and electromagnetic interference when the terminal structure 3 is energized, thereby preventing other control systems from being unable to operate normally due to electromagnetic interference.

[0140] Furthermore, the material of the shielding layer 12 and / or the shielding inner housing 8 includes a conductive metal or a conductive plastic.

[0141] In concrete implementation, the material of the shielding layer 12 and the shielding inner housing 8 needs to include a conductor and be grounded, and the conductive plastic and conductive metal can both shield electromagnetic radiation and prevent interference with other electrical devices in the vehicle. The conductive plastic can be conductive plastic or conductive rubber, which can be processed by injection, extrusion, blow, foaming, dip coating or 3D printing, etc., and the processing process is simple and the processing cost is reduced.

[0142] According to one embodiment of the electric energy transmission connection device of the present disclosure, the cross-sectional shape of the electric connection skeleton 1 is polygonal, and all corners of the polygon are chamfered or rounded.

[0143] In a specific implementation, all corners of the electrical connection skeleton 1, which has a polygonal cross section, are chamfered or rounded, thereby facilitating the connection between the electrical connection skeleton 1 and the connection terminal; when the two are welded or crimped, the connection between the electrical connection skeleton 1 and the connection terminal is stronger, the contact area is larger, and the current flows better; this prevents the electrical resistance from being too large due to the contact area being too small when the electrical connection skeleton 1 is connected to the connection terminal, which can lead to heat generation and even a fire accident; and it can also prevent personal injury and property loss caused by the edge formed by two adjacent sides of the polygon cutting the insulating layer during use.

[0144] In one embodiment of the electric energy transmission connection device disclosed herein, the connector 2 on one side is a charging inlet. With the increasing popularity of new energy vehicles, the devices and equipment for charging new energy vehicles are also advanced accordingly, and the secondary battery in the new energy vehicle needs to use a charging inlet assembly to meet the requirement of fast charging. In the present invention, the connector 2 on one side is a charging inlet and is connected to a charging gun, and the connector 2 on the other side is a high-voltage connector and is connected to a charging battery to realize the purpose of charging the charging battery.

[0145] A vehicle according to the present disclosure includes the above-described electric energy transmission connection device.

[0146] Although some specific embodiments of the present invention have been described in detail by way of example, those skilled in the art should understand that the above examples are merely illustrative and are not intended to limit the scope of the present invention. Those skilled in the art should understand that modifications can be made to the above embodiments without departing from the scope and spirit of the present invention. The scope of the present invention is indicated by the following claims.

Claims

1. At least one electrical connection skeleton; Connectors connected to both ends of the electrical connection skeleton; Including, At least one fastening cavity is provided within the connector; An electrical energy transmission connection device, characterized in that a terminal structure extends from an end of the electrical connection skeleton, at least a portion of the terminal structure is disposed within the fixing cavity, and the terminal structure realizes the electrical connection function of the connector.

2. 2. The electrical energy transmission connection device according to claim 1, wherein the cross-sectional shape of the terminal structure is different from that of the electrical connection skeleton.

3. 2. The electrical energy transmission connection device according to claim 1, wherein the cross-sectional area of ​​the terminal structure is different from that of the electrical connection skeleton.

4. 2. The electrical energy transmission connection device according to claim 1, wherein the connector is molded onto the terminal structure and the electrical connection skeleton.

5. 2. The electrical energy transmission connection device according to claim 1, wherein the connector includes a high voltage interlock structure.

6. 2. The electrical energy transmission connection device according to claim 1, wherein at least a portion of the electrical connection skeleton is rigid, and the tensile strength of the electrical connection skeleton is greater than 75 MPa.

7. 2. The electrical energy transmission connection device of claim 1, wherein the terminal structures are angled relative to an axial direction of the electrical connection skeleton.

8. The electrical energy transmission connection device according to claim 7, characterized in that the axial angle between the terminal structure and the electrical connection skeleton is 0° to 180°.

9. A spacer metal layer is provided on at least a part of the surface of the terminal structure, and the thermal expansion coefficient of the material of the spacer metal layer is 1.1×10 ―６ 2. The electrical energy transmission connection device according to claim 1, characterized in that the electrical energy transmission connection device has a capacitance of 1.5 μm or more.

10. 2. The electrical energy transmission connection device according to claim 1, characterized in that a spacing metal layer is provided on at least a portion of the surface of the terminal structure, and the spacing metal layer contains at least 37 wt % of a copper-aluminum solid solution.

11. 11. The electrical energy transmission connection device according to claim 10, characterized in that the copper-aluminum solid solution contains copper-aluminum compounds, the content of the copper-aluminum compounds being less than 15 wt %.

12. 2. The electrical energy transmission connection device according to claim 1, wherein a spacing metal layer is provided on at least a portion of the surface of the terminal structure, and the material of the spacing metal layer includes one or more of gold, silver, nickel, tin, zinc, tin-lead alloy, silver-antimony alloy, palladium, palladium-nickel alloy, graphite silver, graphene silver, and silver-gold-zirconium alloy.

13. 13. The electric energy transmission connection device according to claim 12, characterized in that a spacing metal layer is provided on at least a portion of the surface of the terminal structure, and the spacing metal layer is provided on the terminal structure by electroplating, electroless plating, magnetron sputtering, vacuum plating, welding, bonding, brush coating, spray coating or bonding.

14. 2. The electrical energy transmission connection device according to claim 1, wherein the terminal structure has a groove or a protrusion in a portion close to the electrical connection skeleton, and a protrusion or a groove in the fixing cavity, the protrusion and the groove being engaged with each other.

15. 15. The electrical energy transmission connection device according to claim 14, wherein a seal ring is provided between the protrusion and the groove.

16. 2. The electric energy transmission connection device according to claim 1, wherein the terminal structure is a columnar body, and the cross-sectional shape of the columnar body is 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 wavy shape.

17. The electric energy transmission connection device according to claim 1, characterized in that the terminal structure is in the form of a flat string, and a through hole or a screw hole is provided in the flat string.

18. The electrical energy transmission connection device according to claim 1, characterized in that the terminal structure includes a flat upper clamping plate and a flat lower clamping plate, and a terminal insertion groove is formed between the upper clamping plate and the lower clamping plate.

19. 2. The electric energy transmission connection device according to claim 1, wherein the terminal structure is cylindrical, and the internal cross-sectional shape of the cylindrical structure is 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 wavy shape.

20. 20. The electrical energy transmission connection device of claim 19, characterized in that the cylindrical outer wall is provided with an expansion / contraction slit extending along the axial direction, and the expansion / contraction slit divides the terminal structure into elastic sheets.

21. 2. The electrical energy transmission connection device according to claim 1, characterized in that the terminal structure has chamfers and rounded corners at its end remote from the electrical connection skeleton.

22. 2. The electric energy transmission connection device according to claim 1, wherein the outer periphery of the electrical connection skeleton is further coated with an insulating layer.

23. 23. The electrical energy transmission connection device according to claim 22, characterized in that the electrical connection skeleton comprises at least one bend, at least a portion of the bend including at least one cavity, the cavity being located in a space from an inner wall of the insulating layer to an outer periphery of the electrical connection skeleton.

24. 23. The electrical energy transmission connection device according to claim 22, wherein the outer periphery of the insulating layer is covered with a shield layer and an outer insulating layer in that order.

25. 23. The electrical energy transmission connection device according to claim 22, characterized in that a seal structure is provided between the connector and the insulating layer.

26. 25. The electrical energy transmission connection device according to claim 24, characterized in that a seal structure is provided between the connector and the outer insulating layer.

27. 25. The electrical energy transmission connection device according to claim 24, characterized in that the connector is provided with a shielded inner housing having a shielding function, the shielded inner housing being electrically connected to the shielding layer.

28. 28. The electrical energy transmission connection device according to claim 27, characterized in that the material of the shielding layer and / or the shielding inner housing comprises a conductive metal or a conductive plastic.

29. 2. The electrical energy transmission connection device according to claim 1, wherein one of the connectors is a charging inlet.

30. 2. The electrical energy transmission connection device according to claim 1, wherein the cross-sectional shape of the electrical connection skeleton is a polygon, and all corners of the polygon are chamfered or rounded.

31. A vehicle comprising an electric energy transmission connection device according to any one of the preceding claims.

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