A connector assembly with liquid cooling function and a vehicle

Abstract

The application discloses a connector assembly with a liquid cooling function and a vehicle, and relates to the technical field of connector assemblies. The connector assembly comprises at least one electric connection framework and connectors connected to both ends of the electric connection framework. The outer periphery of the electric connection framework is sequentially sleeved with a first sleeve and a second sleeve. A first cavity is formed between the outer wall of the electric connection framework and the inner wall of the first sleeve. A second cavity is formed between the outer wall of the first sleeve and the inner wall of the second sleeve. Cooling liquid flows through the first cavity and the second cavity. The application can reduce the failure of the electric connection framework and the connecting terminal caused by high temperature generated by power supply, reduce the diameter of the electric connection framework, prolong the service life of the connector assembly, improve the safety of the vehicle, and shield electromagnetic interference.

Description

Technical Field

[0001] This invention relates to the field of automotive electrical technology, and more specifically, to a connector assembly with liquid cooling function and a vehicle. Background Technology

[0002] With the increasing popularity of new energy vehicles, the electrical cables used for power transmission carry very large currents during normal use. This generates significant heat in the cables and connectors, leading to overheating. Excessive heat can cause cable connections and surrounding components to malfunction, affecting the normal operation of related devices, causing short circuits, open circuits, and even electric shock hazards that could endanger lives. Simultaneously, the large currents in the vehicle's cables generate strong electromagnetic interference. To mitigate this interference, transmission cables typically use shielding meshes. Currently, commonly used shielding meshes are made of woven metal wires, requiring shielding braiding machines in cable production equipment. This high cost and large footprint contribute to the high price of shielded cables for connectors. Furthermore, current connector shielding technology is not yet fully mature, potentially causing interference with in-vehicle electrical systems and rendering them unusable. There are currently no practical solutions to these problems. Therefore, the automotive electrical technology field urgently needs connector assemblies with smaller wire diameters, lower heat generation, and the ability to be produced and assembled automatically. Summary of the Invention

[0003] The purpose of this invention is to provide a connector assembly with liquid cooling function and a new technical solution for vehicles. The connector assembly with liquid cooling function of this invention can reduce the failure of the electrical connection frame and connection terminals caused by high temperatures generated when energized, reduce the diameter of the electrical connection frame, extend the service life of the connector, improve the overall vehicle safety, and simultaneously shield against electromagnetic interference.

[0004] According to a first aspect of the present invention, a connector assembly with liquid cooling function is provided, comprising at least one electrical connection frame and connectors connected to both ends of the electrical connection frame, characterized in that a first sleeve and a second sleeve are sequentially sleeved around the outer periphery of the electrical connection frame, a first cavity is formed between the outer wall of the electrical connection frame and the inner wall of the first sleeve, and a second cavity is formed between the outer wall of the first sleeve and the inner wall of the second sleeve, wherein coolant flows through the first cavity and the second cavity, and the connector further comprises a shielding inner shell, the shielding inner shell being made of conductive metal or conductive plastic, the second sleeve being made of conductive metal or conductive plastic, the second sleeve being electrically connected to the shielding inner shell by crimping or welding, the first sleeve being made of conductive metal or conductive plastic, a shielding device being sleeved at the end of the first sleeve, and the first sleeve being electrically connected to the shielding inner shell through the shielding device.

[0005] Optionally, the connector includes connecting terminals, and the electrical connection frame is electrically connected to the connecting terminals by welding or crimping.

[0006] Optionally, the coolant is made of an insulating material.

[0007] Optionally, the electrical connection frame is made of a rigid solid conductor material.

[0008] Optionally, a portion of the electrical connection skeleton is a flexible body.

[0009] Optionally, the electrical connection frame includes at least one bend.

[0010] Optionally, the cross-sectional shape of the electrical connection frame is polygonal, and all corners of the polygon are chamfered or rounded.

[0011] Optionally, the cross-sectional shape of the electrical connection frame is one or more of the following: elliptical, polygonal, B-shaped, D-shaped, N-shaped, O-shaped, P-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, arc-shaped, and wavy.

[0012] Optionally, the cross-sectional area of ​​the electrical connection frame is 1.5 mm. 2 -240mm 2 .

[0013] Optionally, the first sleeve and the second sleeve are made of rigid materials.

[0014] Optionally, the transfer impedance of the conductive metal or the conductive plastic is less than 100mΩ.

[0015] Optionally, the conductive plastic is a polymer material containing conductive particles, wherein the conductive particles are made of one or more of the following: metal, conductive ceramic, carbon conductor, solid electrolyte, and mixed conductor; and the polymer material contains tetraphenylethylene, polyvinyl chloride, polyethylene, polyamide, polytetrafluoroethylene, tetrafluoroethylene / hexafluoropropylene copolymer, ethylene / tetrafluoroethylene copolymer, polypropylene, polyvinylidene fluoride, polyurethane, polyterephthalic acid, polyurethane elastomer, styrene block copolymer, perfluoroalkoxyalkane, chlorinated polyethylene, polyphenylene sulfide, polystyrene, cross-linked polyolefin, etc. Ethylene propylene rubber, ethylene / vinyl acetate copolymer, chloroprene rubber, natural rubber, styrene-butadiene rubber, nitrile rubber, silicone rubber, cis-butadiene rubber, isoprene rubber, ethylene propylene rubber, butyl rubber, fluororubber, polyurethane rubber, polyacrylate rubber, chlorosulfonated polyethylene rubber, chloroether rubber, chlorinated polyethylene rubber, chlorosulfonated rubber, styrene-butadiene rubber, butadiene rubber, hydrogenated nitrile rubber, polysulfide rubber, cross-linked polyethylene, polycarbonate, polysulfone, polyphenylene ether, polyester, phenolic resin, urea-formaldehyde, styrene-acrylonitrile copolymer, polymethyl methacrylate, and polyoxymethylene resin are among one or more of these.

[0016] Optionally, the metal may contain one or more of the following: nickel, cadmium, zirconium, chromium, cobalt, manganese, aluminum, tin, titanium, zinc, copper, silver, gold, phosphorus, tellurium, and beryllium.

[0017] Optionally, the carbon-containing conductor contains one or more of graphite silver, graphite powder, carbon nanotube materials, and graphene materials.

[0018] Optionally, the impedance between the second sleeve and the inner shielding shell is less than 80mΩ.

[0019] Optionally, the shielding device has at least one first through hole in the axial direction of the electrical connection skeleton.

[0020] Optionally, the sum of the cross-sectional areas of the first through holes accounts for 5%-90% of the cross-sectional area of ​​the shielding device.

[0021] Optionally, at least one first support ring is provided inside the first cavity, the inner wall of the first support ring is in contact with the outer periphery of the electrical connection skeleton, and the outer wall of the first support ring is in contact with the inner wall of the first sleeve.

[0022] Optionally, the first support ring is provided with at least one second through hole in the axial direction of the electrical connection skeleton.

[0023] Optionally, the sum of the cross-sectional areas of the second through holes accounts for 5%-90% of the cross-sectional area of ​​the first cavity.

[0024] Optionally, at least one second support ring is provided inside the second cavity, the inner wall of the second support ring is in contact with the outer periphery of the first sleeve, and the outer wall of the second support ring is in contact with the inner wall of the second sleeve.

[0025] Optionally, the second support ring is provided with at least one third through hole in the axial direction of the electrical connection skeleton.

[0026] Optionally, the sum of the cross-sectional areas of the third through holes accounts for 5%-90% of the cross-sectional area of ​​the second cavity.

[0027] Optionally, at least one first support ring is provided inside the first cavity, and at least one second support ring is provided inside the second cavity. The electrical connection skeleton, the first sleeve, and the second sleeve have curved portions, and the first support ring and the second support ring are respectively provided at at least at both ends and the middle position of the curved portion.

[0028] Optionally, the thickness of the first sleeve and the second sleeve are respectively 0.1%-20% of the outer diameter of the electrical connection skeleton.

[0029] Optionally, the difference in cross-sectional area between the first cavity and the second cavity does not exceed 20%.

[0030] Optionally, the connector includes a first connector and a second connector connecting the two ends of the electrical connection skeleton. The first connector has a rotating cavity inside, which communicates with both the first cavity and the second cavity. The second connector has an adapter cavity inside, which communicates with the first cavity. A guide tube communicating with the second cavity is provided on the second sleeve. The guide tube passes through the outer wall of the second connector and extends to the outside of the second connector. An outlet tube communicating with the adapter cavity is provided on the outside of the second connector.

[0031] Optionally, the second cavity is sealed at the end of the inlet tube.

[0032] Optionally, the connector includes a first connector and a second connector connecting the two ends of the electrical connection skeleton. The first connector has a rotating cavity inside, which communicates with both the first cavity and the second cavity. The second connector has an adapter cavity inside, which communicates with the second cavity. The first sleeve has an inlet tube communicating with the first cavity. The inlet tube passes through the side wall of the second sleeve and the outer wall of the second connector and extends to the outside of the second connector. The outside of the second connector has an outlet tube communicating with the adapter cavity.

[0033] Optionally, the first cavity is sealed at the end of the inlet tube.

[0034] Optionally, a first sealing structure is provided between the inlet tube and the outlet tube and the second connector.

[0035] Optionally, a second sealing structure is provided between the connector and the second sleeve.

[0036] Optionally, the boiling point of the coolant is greater than or equal to 100°C.

[0037] Optionally, the coolant contains one or more of the following: water, ethylene glycol, silicone oil, fluorinated liquid, castor oil, coconut oil, corn oil, cottonseed oil, linseed oil, olive oil, palm oil, peanut oil, grapeseed oil, rapeseed oil, safflower oil, sunflower oil, soybean oil, decenoic acid, decenoic acid, myrcenoic acid, linalool, tetradecenoic acid, succinic acid, succinic acid, palmitic acid, apigenic acid, oleic acid, octadecenoic acid, codenoic acid, succinic acid, cetyl ester, erucic acid, and nervonic acid, glycerin, transformer oil, axle oil, internal combustion engine oil, or compressor oil.

[0038] Optionally, the cooling rate of the coolant on the electrical connection frame is 0.04 K / s to 5 K / s.

[0039] This article also provides a vehicle including the above-described connector assembly with liquid cooling function, circulation pump and cooling device, wherein the first cavity or the second cavity is respectively connected to the circulation pump and the cooling device.

[0040] The beneficial effects of this invention are:

[0041] This solves the problem of the current high-voltage wiring harness having a large wire diameter. By using liquid cooling technology, the heat generation of the electrical connection frame is reduced, enabling the electrical connection frame to conduct a larger current with a smaller wire diameter.

[0042] This invention solves the problem that current high-voltage wire harnesses using flexible cables cannot achieve automated production and assembly. By using at least a partially rigid electrical connection frame, automated assembly and assembly of wire harnesses can be achieved.

[0043] To address the problem of low cooling efficiency in current liquid-cooled wiring harnesses, which rely on liquid cooling pipes for cooling, this invention allows the coolant to directly contact the electrical connection frame, rapidly reducing its temperature and enabling high-current conduction.

[0044] This invention solves the problem of short circuits caused by friction between flexible cables and the vehicle body, which leads to damage to the insulation layer. The electrical connection frame can be arranged to follow the shape of the vehicle body, but can also be kept at a certain distance from the vehicle body to ensure that it does not rub against the vehicle body, thereby ensuring the service life of the electrical connection frame.

[0045] The connector has an internal shielding shell, which can effectively prevent electromagnetic interference generated by the connector terminals. The shielding shell, made of conductive plastic, can be integrally molded with the connector, saving processing time, improving production efficiency, and reducing production costs.

[0046] The electrical connection frame also features flexible and curved sections, allowing for a more rational design of the connector assembly structure based on the vehicle's installation environment. This makes installation of the connector assembly on the vehicle easier and saves assembly time.

[0047] The sealing ring prevents coolant leakage at the connection point, while the support ring supports the cavity and prevents it from being deformed by external forces, thus affecting the flow of coolant.

[0048] The system employs multiple sleeves connected to the electrical connection frame. The sleeves serve both as a cavity structure and as a shielding layer, effectively shielding the electromagnetic interference generated by the electrical connection frame when energized.

[0049] Other features and advantages of the invention will become clear from the following detailed description of exemplary embodiments of the invention with reference to the accompanying drawings. Attached Figure Description

[0050] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments of the invention and, together with their description, serve to explain the principles of the invention.

[0051] Figure 1 This is a schematic diagram of the connector assembly with liquid cooling function according to the present invention.

[0052] Figure 2 This is a schematic diagram of the internal structure of the connector assembly with liquid cooling function according to the present invention.

[0053] Figure 3 This is a cross-sectional view of the electrical connection frame of the connector assembly with liquid cooling function according to the present invention.

[0054] Figure 4 This is a schematic diagram of the shielding inner shell of the connector assembly with liquid cooling function according to the present invention.

[0055] Figure 5 This is a schematic diagram of another connection method for the shielding inner shell of the connector assembly with liquid cooling function according to the present invention.

[0056] Figure 6 This is a schematic diagram of the structure of the bent portion of the connector assembly with liquid cooling function according to the present invention.

[0057] Figure 7 for Figure 6 Cross-sectional view of surface AA.

[0058] Figure 8 This is a schematic diagram of the inlet pipe of the connector assembly with liquid cooling function according to the present invention.

[0059] Figure 9 This is a schematic diagram of the inlet and outlet pipes of the connector assembly with liquid cooling function according to the present invention.

[0060] Figure 10 This is a schematic diagram of another connection method for the inlet and outlet pipes of the connector assembly with liquid cooling function according to the present invention.

[0061] Figure 11 This is a schematic diagram of the liquid inlet and outlet of the connector assembly with liquid cooling function according to the present invention.

[0062] Figure 12 This is a schematic diagram of another liquid inlet and return method for the connector assembly with liquid cooling function according to the present invention.

[0063] The diagram is marked as follows:

[0064] 1-Connector, 11-First connector, 12-Second connector, 2-Electrical connection frame, 3-Connection terminal, 4-Shielding inner shell, 5-First sleeve, 51-First cavity, 511-First support ring, 512-Second through hole, 52-Shielding device, 521-First through hole, 6-Second sleeve, 61-Second cavity, 611-Second support ring, 612-Third through hole, 7-Second sealing structure, 81-Rotating cavity, 82-Transfer cavity, 83-Inlet pipe, 84-Outlet pipe, 9-Circulating pump, 10-Cooling device. Detailed Implementation

[0065] 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 otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the invention.

[0066] The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the invention or its application or use.

[0067] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and equipment should be considered part of the specification.

[0068] In all the examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values.

[0069] A connector assembly with liquid cooling function, such as Figures 1-12As shown, it includes at least one electrical connection frame 2 and connectors 1 connected to both ends of the electrical connection frame 2. A first sleeve 5 and a second sleeve 6 are sequentially sleeved on the outer periphery of the electrical connection frame 2. A first cavity 51 is formed between the outer wall of the electrical connection frame 2 and the inner wall of the first sleeve 5, and a second cavity 61 is formed between the outer wall of the first sleeve 5 and the inner wall of the second sleeve 6. Coolant flows in the first cavity 51 and the second cavity 61.

[0070] Currently, most connector assemblies use multi-core copper cables for charging, which are heavy and expensive, hindering the widespread adoption of new energy vehicles. Furthermore, while multi-core cables are more flexible and easier to process and route, their large diameter and weight cause them to rub against the vehicle body during driving, leading to insulation damage and high-voltage discharge. This can damage the vehicle or even cause serious traffic accidents. Therefore, a cable design using an electrical connection frame 2 can replace the multi-core cable structure. This allows the cable to be fixed to the vehicle body, preventing friction with the body due to vehicle vibration, extending the connector assembly's lifespan, and reducing the accident rate. During vehicle charging, the current flowing through the electrical connection frame 2 is very large, causing its temperature to rise rapidly. The coolant flowing in the first cavity 51 and the second cavity 61 cools the electrical connection frame 2, reducing its heat and allowing the connector assembly to operate at a safe temperature.

[0071] In some embodiments, the connector 1 includes a connecting terminal 3, and the electrical connection frame 2 is electrically connected to the connecting terminal 3 by welding or crimping. The connecting terminal 3 and the electrical connection frame 2 are connected by welding. The welding method used includes one or more of resistance welding, friction welding, ultrasonic welding, arc welding, laser welding, electron beam welding, pressure diffusion welding, and magnetic induction welding. This method uses concentrated heat or pressure to create a molten connection at the contact point between the connecting terminal 3 and the electrical connection frame 2, resulting in a stable welded connection.

[0072] In addition, copper is more inert than aluminum. The electrode potential difference between copper and aluminum is 1.9997V. When these two metals are connected and electricity is applied, an electrochemical reaction will occur, causing the aluminum wire to be gradually oxidized, reducing the mechanical strength and conductivity of the aluminum wire. Welding can be used to connect dissimilar materials. Since the contact points are compatible, the conductivity is better.

[0073] Resistance welding is a method of welding that uses a strong current to pass through the contact point between the electrode and the workpiece, generating heat through contact resistance.

[0074] Friction welding is a method that uses the heat generated by friction between the contact surfaces of workpieces as a heat source to cause plastic deformation of the workpieces under pressure, thereby performing welding.

[0075] Ultrasonic welding uses high-frequency vibration waves to be transmitted to the surfaces of two objects to be welded. Under pressure, the surfaces of the two objects rub against each other, forming a fusion between molecular layers.

[0076] Arc welding refers to the use of an electric arc as a heat source, utilizing the physical phenomenon of air discharge to convert electrical energy into the heat and mechanical energy required for welding, thereby achieving the purpose of joining metals. The main methods include shielded metal arc welding, submerged arc welding, and gas shielded welding.

[0077] Laser welding is a highly efficient and precise welding method that uses a high-energy-density laser beam as a heat source.

[0078] Friction welding is a method that uses the heat generated by friction between the contact surfaces of workpieces as a heat source to cause plastic deformation of the workpieces under pressure, thereby performing welding.

[0079] Electron beam welding refers to the welding process that uses an accelerated and focused electron beam to bombard a welding surface placed in a vacuum or non-vacuum environment, causing the workpiece to melt and thus achieving welding.

[0080] Pressure welding is a method of welding that applies pressure to the workpieces, causing the joint surfaces to come into close contact and produce a certain amount of plastic deformation.

[0081] Magnetic induction welding involves two workpieces being subjected to a strong pulsed magnetic field, resulting in a high-speed, instantaneous collision. Under the influence of a high pressure wave, the atoms of the two materials meet within their atomic distance, forming a stable metallurgical bond at the interface. It is a type of solid-state cold welding that can weld together conductive metals with similar or dissimilar properties.

[0082] In some embodiments, the coolant is made of an insulating material, such as insulating oil. Insulating oil can quickly conduct the high temperature of the electrical connection frame 2 to the outside, achieving rapid cooling. Furthermore, it prevents the electrical connection frame 2 from being electrically connected to the protective shell, thus ensuring they function as separate conductive circuits.

[0083] In some embodiments, the electrical connection frame 2 is made of a rigid solid conductor material. That is, the electrical connection frame 2 is composed of a solid wire, and the specific material can be copper or copper alloy, aluminum or aluminum alloy, which have excellent conductivity. It can be fixed to the vehicle body and will not rub against the vehicle body due to vehicle vibration, thereby extending the service life of the connector assembly and reducing the accident rate.

[0084] In some embodiments, the cross-sectional area of ​​the electrical connection frame 2 is 1.5 mm. 2 -240mm 2The cross-sectional area of ​​the electrical connection frame 2 determines the current it can conduct. Generally, for electrical connection frames 2 used to conduct signals, the current is relatively small, and therefore the cross-sectional area is also relatively small. For example, the minimum cross-sectional area of ​​the electrical connection frame 2 used for signal transmission can reach 1.5 mm². 2 The electrical connection frame 2, which enables power conduction, handles a large current and therefore has a large cross-sectional area. For example, in automotive battery wiring harnesses, the maximum cross-sectional area of ​​conductor 2 reaches 240 mm². 2 .

[0085] In some embodiments, the first sleeve 5 and the second sleeve 6 are made of rigid materials. A rigid body is an object whose shape and size remain unchanged during motion and after being subjected to force, and whose relative positions of all points inside remain unchanged. Absolutely rigid bodies do not actually exist; they are merely ideal models. This is because any object deforms to some extent after being subjected to force. If the degree of deformation is extremely small relative to the object's geometric dimensions, it can be ignored when studying the object's motion. Therefore, the deformation of the first sleeve 5 and the second sleeve 6, made of rigid materials, during use is negligible. The greater the tensile strength of a rigid body, the smaller its deformation.

[0086] In some embodiments, one of the first sleeve 5 and the second sleeve 6 is made of conductive metal or conductive plastic. The conductive plastic is a conductive plastic or conductive rubber containing metal particles. The advantage of using conductive plastic is that it facilitates injection molding, and the user can select the appropriate material for the first sleeve 5 or the second sleeve 6 as needed.

[0087] In some embodiments, the connector 1 further includes a shielding inner shell 4, the shielding inner shell 4 being made of conductive metal or conductive plastic. For example... Figure 2 As shown, to reduce the impact of electromagnetic interference, conductive cables typically use shielding mesh for electromagnetic interference shielding. Currently, commonly used shielding meshes are made of woven metal wires, requiring the addition of a shielding braiding machine to the cable production equipment. This equipment is expensive and occupies a large area, resulting in a high price for the shielded cable of connector 1. However, the shielding inner shell 4 made of conductive material in this invention can act as a shielding layer, effectively shielding the electromagnetic interference generated by the energized electrical connection frame 2, saving the use of shielding mesh and reducing the cost of the connector assembly.

[0088] In some embodiments, the transfer impedance of the conductive metal or conductive plastic is less than 100 mΩ. The shielding effect of the inner shielding shell 4 is typically characterized by its transfer impedance; the smaller the transfer impedance, the better the shielding effect. The transfer impedance of the inner shielding shell 4 is defined as the ratio of the differential-mode voltage U induced per unit length of the shielding body to the current Is passing through the surface of the shielding body, i.e.: Z T =U / I STherefore, it can be understood that the transfer impedance of the inner shield 4 converts the current in the inner shield 4 into differential-mode interference. The smaller the transfer impedance, the better, that is, the smaller the differential-mode interference conversion, and the better the shielding performance can be obtained.

[0089] To verify the effect of shielding inner shell 4 with different transfer impedance values ​​on shielding performance, the inventors selected electrical connection frame 2, connector 1 and connection terminal 3 of the same specifications and used protective shell 5 with different transfer impedance values ​​to make a series of samples and tested the shielding performance respectively. The experimental results are shown in Table 1 below. In this embodiment, a shielding performance value greater than 40dB is the ideal value.

[0090] The shielding performance test method is as follows: The testing instrument outputs a signal value (this value is test value 2) to the electrical connection frame 2. A detection device is set on the outside of the electrical connection frame 2, and this detection device detects a signal value (this value is test value 1). Shielding performance value = test value 2 - test value 1.

[0091] Table 1: Influence of transfer impedance of inner shield 4 on shielding performance

[0092]

[0093] As can be seen from Table 1 above, when the transfer impedance value of the inner shield 4 is greater than 100mΩ, the shielding performance value of the inner shield 4 is less than 40dB, which does not meet the ideal value requirement. However, when the transfer impedance value of the inner shield 4 is less than 100mΩ, the shielding performance value of the inner shield 4 meets the ideal value requirement, and the trend is getting better and better. Therefore, the inventors set the transfer impedance of the conductive metal or conductive plastic to be less than 100mΩ.

[0094] In some embodiments, the conductive plastic is a polymer material containing conductive particles, wherein the conductive particles are made of one or more of the following: metal, conductive ceramic, carbon-containing conductor, solid electrolyte, and mixed conductor; and the polymer material contains tetraphenylethylene, polyvinyl chloride, polyethylene, polyamide, polytetrafluoroethylene, tetrafluoroethylene / hexafluoropropylene copolymer, ethylene / tetrafluoroethylene copolymer, polypropylene, polyvinylidene fluoride, polyurethane, polyterephthalic acid, polyurethane elastomer, styrene block copolymer, perfluoroalkoxyalkane, chlorinated polyethylene, polyphenylene sulfide, polystyrene, and cross-linked polyolefin. One or more of the following: ethylene propylene rubber, ethylene / vinyl acetate copolymer, chloroprene rubber, natural rubber, styrene-butadiene rubber, nitrile rubber, silicone rubber, cis-butadiene rubber, isoprene rubber, ethylene propylene rubber, butyl rubber, fluororubber, polyurethane rubber, polyacrylate rubber, chlorosulfonated polyethylene rubber, chloroether rubber, chlorinated polyethylene rubber, chlorosulfonated rubber, styrene-butadiene rubber, butadiene rubber, hydrogenated nitrile rubber, polysulfide rubber, cross-linked polyethylene, polycarbonate, polysulfone, polyphenylene ether, polyester, phenolic resin, urea-formaldehyde, styrene-acrylonitrile copolymer, polymethyl methacrylate, and polyoxymethylene resin.

[0095] In some embodiments, the metal material contains one or more of nickel, cadmium, zirconium, chromium, cobalt, manganese, aluminum, tin, titanium, zinc, copper, silver, gold, phosphorus, tellurium, and beryllium. To demonstrate the influence of different metal materials on the conductivity of the shielding inner shell 4, the inventors conducted experiments, using metal particles of the same size but different materials to fabricate samples of the shielding inner shell 4, and tested the conductivity of the shielding inner shell 4 accordingly. The experimental results are shown in Table 2 below. In this embodiment, a conductivity greater than 99% for the shielding inner shell 4 is considered ideal.

[0096] Table 2: Influence of metal particles of different materials on the conductivity of the shielding inner shell 4

[0097]

[0098] As can be seen from Table 2 above, the conductivity of conductive plastics made from different metal particles is within the ideal range. Furthermore, phosphorus is a non-metallic material and cannot be directly used as a material for conductive coatings, but it can be added to other metals to form alloys, improving the conductivity and mechanical properties of the metals themselves. Therefore, the inventors specified that the metal particles be one or more of the following: nickel, cadmium, zirconium, chromium, cobalt, manganese, aluminum, tin, titanium, zinc, copper, silver, gold, phosphorus, tellurium, and beryllium.

[0099] In some embodiments, the carbon-containing conductor contains one or more of graphite silver, graphite powder, carbon nanotubes, and graphene. Graphite powder is a mineral powder, mainly composed of elemental carbon, soft, and blackish-gray; it is an excellent non-metallic conductive material. Carbon nanotubes have good electrical conductivity because their structure is the same as the layered structure of graphite, thus exhibiting excellent electrical properties. Graphene possesses extremely high electrical properties. A carbon-containing conductor containing these three materials has high conductivity and good shielding performance, effectively achieving electromagnetic shielding.

[0100] In some embodiments, the second sleeve 6 is made of conductive metal or conductive plastic, and the second sleeve 6 is electrically connected to the shielding inner shell 4 by crimping or welding. Figure 2 As shown, the second sleeve 6 is electrically connected to the inner shielding shell 4. Crimping is a production process where the inner shielding shell 4 and the second sleeve 6 are assembled and then pressed together using a crimping machine. The advantage of crimping is its mass production capability; by using an automatic crimping machine, products of stable quality can be manufactured rapidly and in large quantities. The welding method is basically the same as that for the connecting terminal 3 and the electrical connection frame 2, and will not be described further.

[0101] In some embodiments, the impedance between the second sleeve 6 and the inner shield 4 is less than 80mΩ. The impedance between the second sleeve 6 and the inner shield 4 should be as small as possible so that the current generated by the inner shield 4 can flow back to the energy source or grounding location without obstruction. If the impedance between the second sleeve 6 and the inner shield 4 is large, a large current will be generated between the second sleeve 6 and the inner shield 4, resulting in greater radiation at the cable connection.

[0102] To verify the effect of the impedance between the second sleeve 6 and the shielding inner shell 4 on the shielding effect, the inventors selected electrical connection frame 2, connector 1 and connection terminal 3 of the same specifications, and selected different impedances between the second sleeve 6 and the shielding inner shell 4 to make a series of samples, and tested the shielding effect respectively. The experimental results are shown in Table 3 below. In this embodiment, a shielding performance value greater than 40dB is the ideal value.

[0103] The shielding performance test method is as follows: The testing instrument outputs a signal value (this value is test value 2) to the electrical connection frame 2. A detection device is set on the outside of the electrical connection frame 2, and this detection device detects a signal value (this value is test value 1). Shielding performance value = test value 2 - test value 1.

[0104] Table 3: Influence of the impedance between the second sleeve 6 and the inner shielding shell 4 on the shielding performance

[0105]

[0106] As can be seen from Table 3, when the impedance between the second sleeve 6 and the inner shield 4 is greater than 80mΩ, the shielding performance value is less than 40dB, which does not meet the ideal value requirement. However, when the impedance between the second sleeve 6 and the inner shield 4 is less than 80mΩ, the shielding performance value meets the ideal value requirement, and the trend is getting better and better. Therefore, the inventors set the impedance between the second sleeve 6 and the inner shield 4 to be less than 80mΩ.

[0107] In some embodiments, the first sleeve 5 is made of conductive metal or conductive plastic, and a shielding device 52 is attached to the end of the first sleeve 5. The first sleeve 5 is electrically connected to the shielding inner shell 4 through the shielding device 52. Figure 4 As shown, the first sleeve 5 is directly electrically connected to the shielding inner shell 4. In this embodiment, as... Figure 5 As shown, the first sleeve 5 is not directly electrically connected to the inner shielding shell 4, but a shielding device 52 is sleeved around the end of the first sleeve 5, so that the first sleeve 5 is electrically connected to the inner shielding shell 4 through the shielding device 52.

[0108] In some embodiments, the shielding device 52 has at least one first through hole 521 in the axial direction of the electrical connection frame 2. To allow coolant to flow smoothly through the shielding device 52, the shielding device 52 has at least one first through hole 521 in the axial direction of the electrical connection frame 2, enabling the coolant to pass smoothly through the shielding device 52 and achieve a cooling effect. Figure 5 As shown.

[0109] In some embodiments, the sum of the cross-sectional areas of the first through holes 521 accounts for 5%-90% of the cross-sectional area of ​​the shielding device 52. If the sum of the cross-sectional areas of the first through holes 521 is too large, the supporting force of the shielding device 52 will be insufficient; if the sum of the cross-sectional areas of the first through holes 521 is too small, the cooling efficiency will be insufficient. To select a reasonable sum of the cross-sectional areas of the first through holes 521, the inventors conducted relevant tests. The experimental method was to select the same electrical connection frame 2 with the same shielding device 52, and set the first through holes 521 with different cross-sectional areas in the shielding device 52. A force of 80N was applied, and the shielding device 52 was observed to deform. If it deformed, it was considered unqualified. In a closed environment, the same current was conducted on the electrical connection frame 2 with different first through holes 521. A temperature rise of less than 50K was considered acceptable. The results are shown in Table 4.

[0110] Table 4: The effect of the ratio of the sum of the cross-sectional areas of the first through holes 521 to the cross-sectional area of ​​the shielding device 52 on the temperature rise of the shielding device 52 support and electrical connection frame 2.

[0111]

[0112] As can be seen from Table 4 above, when the sum of the cross-sectional areas of the first through holes 521 accounts for less than 5% of the cross-sectional area of ​​the shielding device 52, the temperature rise of the electrical connection frame 2 is greater than 50K, which is unqualified. When the sum of the cross-sectional areas of the first through holes 521 accounts for more than 90% of the cross-sectional area of ​​the shielding device 52, the shielding device 52 will deform under the force of 80N, which can easily lead to a decrease in cooling rate or even coolant leakage. Therefore, the inventors prefer that the ratio of the sum of the cross-sectional areas of the first through holes 521 to the cross-sectional area of ​​the shielding device 52 is 5%-90%.

[0113] In some embodiments, at least one first support ring 511 is provided inside the first cavity 51, the inner wall of the first support ring 511 contacts the outer periphery of the electrical connection skeleton 2, and the outer wall of the first support ring 511 contacts the inner wall of the first sleeve 5. Figures 6-7 As shown, the first support ring 511 can support the first cavity 51, preventing the first cavity 51 from narrowing due to external compression, which would reduce the cooling efficiency of the connector assembly. It also prevents short circuits caused by contact between the electrical connection frame 2 and the first sleeve 5. Multiple first support rings 511 can be used. During processing, they can be first fixed to the electrical connection frame 2, then the first sleeve 5 can be fitted, and then the outer wall of the first support ring 511 can be pressed to contact the inner wall of the first sleeve 5.

[0114] Furthermore, the first support ring 511 is provided with at least one second through hole 512 in the axial direction of the electrical connection frame 2. For example... Figure 7 As shown, in order to prevent the first support ring 511 from blocking the coolant and causing a decrease in the cooling efficiency of the connector assembly, the first support ring 511 is provided with at least one second through hole 512 in the axial direction of the electrical connection frame 2, which allows the coolant to pass smoothly through the first support ring 511 and obtain a cooling effect.

[0115] Furthermore, the sum of the cross-sectional areas of the second through holes 512 accounts for 5%-90% of the cross-sectional area of ​​the first cavity 51. If the sum of the cross-sectional areas of the second through holes 512 is too large, the supporting force of the first support ring 511 will be insufficient; if the sum of the cross-sectional areas of the second through holes 512 is too small, the cooling efficiency will be insufficient. In order to select a reasonable sum of the cross-sectional areas of the second through holes 512, the inventors conducted relevant tests. The experimental method is to select the same electrical connection frame 2 with the same first cavity 51, and set the first support ring 511 with different second through holes 512 in the first cavity 51. Apply a force of 80N and observe whether the first cavity 51 deforms. If it deforms, it is unqualified. In a closed environment, conduct the same current to the electrical connection frame 2 with different second through holes 512. A temperature rise of less than 50K is considered qualified. The results are shown in Table 5.

[0116] Table 5: The effect of the ratio of the sum of the cross-sectional areas of the second through holes 512 to the cross-sectional area of ​​the first cavity 51 on the temperature rise of the first cavity support and electrical connection frame 2.

[0117]

[0118] As can be seen from Table 5 above, when the sum of the cross-sectional areas of the second through holes 512 accounts for less than 5% of the cross-sectional area of ​​the first cavity 51, the temperature rise of the electrical connection frame 2 is greater than 50K, which is unqualified. When the sum of the cross-sectional areas of the second through holes 512 accounts for more than 90% of the cross-sectional area of ​​the first cavity 51, the first cavity 51 will deform under the force of 80N, which can easily lead to a decrease in cooling rate or even coolant leakage. Therefore, the inventors prefer that the sum of the cross-sectional areas of the second through holes 512 accounts for 5%-90% of the cross-sectional area of ​​the first cavity 51.

[0119] In some embodiments, at least one second support ring 611 is provided inside the second cavity 61, such as... Figure 6 As shown, the inner wall of the second support ring 611 contacts the outer periphery of the first sleeve 5, and the outer wall of the second support ring 611 contacts the inner wall of the second sleeve 6. The second support ring 611 can support the second cavity 61, preventing the second cavity 61 from narrowing due to external compression, which would reduce the cooling efficiency of the connector assembly, and at the same time avoid short circuits caused by contact between the first sleeve 5 and the second sleeve 6. Multiple second support rings 611 can be provided. During processing, the first sleeve 5 can be fixed first, then the second sleeve 6 can be fitted, and then the outer wall of the second support ring 611 can be pressed to contact the inner wall of the second sleeve 6.

[0120] Furthermore, the second support ring 611 is provided with at least one third through hole 612 in the axial direction of the electrical connection frame 2. For example... Figure 7 As shown, in order to prevent the second support ring 611 from blocking the coolant and causing a decrease in the cooling efficiency of the connector assembly, the second support ring 611 is provided with at least one third through hole 612 in the axial direction of the electrical connection skeleton 2, which allows the coolant to pass smoothly through the second support ring 611 and obtain a cooling effect.

[0121] Furthermore, the sum of the cross-sectional areas of the third through holes 612 accounts for 5%-90% of the cross-sectional area of ​​the second cavity 61. If the sum of the cross-sectional areas of the third through holes 612 is too large, the supporting force of the second support ring 611 will be insufficient; if the sum of the cross-sectional areas of the third through holes 612 is too small, the cooling efficiency will be insufficient. In order to select a reasonable sum of the cross-sectional areas of the third through holes 612, the inventors conducted relevant tests. The experimental method is the same as the method for verifying the cross-sectional area of ​​the second through hole 612 to the cross-sectional area of ​​the first cavity 51, and will not be repeated here. Therefore, the inventors prefer that the ratio of the sum of the cross-sectional areas of the third through holes 612 to the cross-sectional area of ​​the second cavity 61 is 5%-90%.

[0122] In some embodiments, at least one first support ring 511 is provided inside the first cavity 51, and at least one second support ring 611 is provided inside the second cavity 61. The electrical connection frame 2, the first sleeve 5, and the second sleeve 6 have curved portions, and the first support ring 511 and the second support ring 611 are respectively provided at at least at both ends and the middle position of the arc of the curved portion. Figures 6-7 As shown, the first support ring 511 supports the first cavity 51, preventing the first cavity 51 from narrowing due to external compression, which would reduce the cooling efficiency of the connector assembly. It also prevents short circuits caused by contact between the electrical connection frame 2 and the first sleeve 5. Multiple first support rings 511 can be used. Multiple second support rings 611 support the second cavity 61. The arc formed at the bend is more susceptible to compression; therefore, placing first support rings 511 and second support rings 611 at both ends and the middle of the arc provides better support.

[0123] In some embodiments, the thickness of the first sleeve 5 and the second sleeve 6 accounts for 0.1%-20% of the outer diameter of the electrical connection frame 2, respectively. If the thickness of the first sleeve 5 is too small, the conductivity will be insufficient, and the shielding effect will not meet the requirements. If the thickness of the first sleeve 5 is too large, it will waste material and increase the weight of the vehicle body. In order to demonstrate the effect of different ratios of the first sleeve 5 to the outer diameter of the electrical connection frame 2 on the conductivity of the first sleeve 5, the inventors used materials of different thicknesses and the same material to make first sleeve 5 samples, and tested the conductivity of each. The experimental results are shown in Table 6. In this embodiment, a conductivity of the first sleeve 5 greater than or equal to 99% is the ideal value.

[0124] Table 6: Effect of different ratios of the thickness of the first sleeve 5 to the outer diameter of the electrical connection frame 2 on conductivity.

[0125]

[0126] As can be seen from Table 6, when the thickness of the first sleeve 5 accounts for less than 0.1% of the outer diameter of the electrical connection frame 2, the conductivity of the first sleeve 5 is less than 99%, which is unqualified. When the thickness of the first sleeve 5 accounts for more than 20% of the outer diameter of the electrical connection frame 2, the conductivity does not increase significantly, and the shielding effect will not be further enhanced. Moreover, a thicker first sleeve 5 will increase the cost and vehicle weight. Therefore, the inventors prefer the thickness of the first sleeve 5 to be 0.1%-20% of the outer diameter of the electrical connection frame 2.

[0127] In some embodiments, the difference in cross-sectional area between the first cavity 51 and the second cavity 61 does not exceed 20%. In practical applications, the first cavity 51 and the second cavity 61 have the same cross-sectional area or the area difference is less than 20%, which can ensure that the flow rate of coolant is consistent when it flows through the first cavity 51 and the second cavity 61, thus ensuring cooling efficiency.

[0128] In some embodiments, connector 1 includes a first connector 11 and a second connector 12 connecting the two ends of the electrical connection frame 2. The first connector 11 has a rotating cavity 81 internally, which communicates with the first cavity 51 and the second cavity 61. The second connector 12 has a transition cavity 82 internally, which communicates with the first cavity 51. A guide tube 83 communicating with the second cavity 61 is provided on the second sleeve 6. The guide tube 83 passes through the outer wall of the second connector 12 and extends to the outside of the second connector 12. A discharge tube 84 communicating with the transition cavity 82 is provided on the outside of the second connector 12. Figure 9 As shown.

[0129] Furthermore, the end of the second cavity 61 connected to the inlet tube 83 is sealed. Under normal circumstances, the second cavity 61 and the transition cavity 82 are connected. Therefore, when the inlet tube 83 is provided on the second sleeve 6 to connect the second cavity 61, the end of the second cavity 61 needs to be sealed to isolate the connection between the second cavity 61 and the transition cavity 82.

[0130] In some embodiments, the connector 1 includes a first connector 11 and a second connector 12 connecting the two ends of the electrical connection frame 2. The first connector 11 has a rotating cavity 81 internally, which communicates with the first cavity 51 and the second cavity 61. The second connector 12 has a transition cavity 82 internally, which communicates with the second cavity 61. An inlet tube 83 communicating with the first cavity 51 is provided on the first sleeve 5. The inlet tube 83 passes through the outer wall of the second connector 12 and extends to the outside of the second connector 12. An outlet tube 84 communicating with the transition cavity 82 is provided on the outside of the second connector 12. Figure 10 As shown.

[0131] Furthermore, the end of the first cavity 51 connected to the inlet tube 83 is sealed. Under normal circumstances, the first cavity 51 and the transition cavity 82 are connected. Therefore, when the inlet tube 83 is provided on the first sleeve 5 to connect the first cavity 51, the end of the first cavity 51 needs to be sealed to isolate the connection between the first cavity 51 and the transition cavity 82.

[0132] In some embodiments, a first sealing structure is provided between the inlet pipe 83 and the outlet pipe 84 and the second connector 12. The first sealing structure prevents coolant leakage from the connection points of the inlet pipe 83 and the outlet pipe 84 with the second connector 12.

[0133] In some embodiments, a second sealing structure 7 is provided between the connector 1 and the second sleeve 6. For example... Figure 2 As shown, the second sealing structure 7 can prevent coolant from leaking from the connection between the connector 1 and the protective shell 5.

[0134] In some embodiments, the boiling point of the coolant is greater than or equal to 100°C. Different coolants have different boiling points under the same external pressure; the inherent properties and composition of the coolant cause these differences in boiling point. A boiling point greater than 100°C is preferred to prevent the coolant from overheating. Once the coolant reaches its boiling point, it produces a large amount of vapor and bubbles. These bubbles occupy a portion of the cooling system's surface area, hindering coolant flow and reducing cooling efficiency. Therefore, the inventors prefer a boiling point of 100°C or greater for the coolant.

[0135] In some embodiments, the coolant contains one or more of the following: water, ethylene glycol, silicone oil, fluorinated fluid, castor oil, coconut oil, corn oil, cottonseed oil, linseed oil, olive oil, palm oil, peanut oil, grapeseed oil, rapeseed oil, safflower oil, sunflower oil, soybean oil, decenoic acid, decenoic acid, myrcenoic acid, linalool, tetradecenoic acid, succinic acid, succinic acid, palmitic acid, apigenic acid, oleic acid, octadecenoic acid, codenoic acid, succinic acid, cetyl oleate, erucic acid, and nervonic acid, glycerin, transformer oil, axle oil, internal combustion engine oil, or compressor oil. Additives may also be added to the coolant, selected from one or more of antioxidants, pour point inhibitors, corrosion inhibitors, antibacterial agents, and viscosity modifiers. These coolants possess advantages such as sensitive thermal balance, superior heat conduction, an ultra-wide operating temperature range, and prevention of boiling over.

[0136] In some embodiments, the cooling rate of the coolant on the electrical connection frame 2 is 0.04 K / s-5 K / s. To verify the effect of the cooling rate of the coolant on the temperature rise of the electrical connection frame 2, the inventors selected 10 electrical connection frames 2 with the same cross-sectional area, material, and length, and applied the same current to them. They used coolants with different cooling rates to cool the electrical connection frames 2 and recorded the temperature rise values ​​of each electrical connection frame 2 in Table 7.

[0137] The experimental method involves conducting the same current through the electrical connection frame 2 of coolants with different cooling rates in a closed environment, recording the temperature before energizing and the temperature after stabilization, and taking the absolute value of the difference. In this embodiment, a temperature rise of less than 50K is considered acceptable.

[0138] Table 7: Effect of coolant with different cooling rates on temperature rise of electrical connection frame 2

[0139]

[0140] As can be seen from Table 7 above, when the cooling rate of cooling structure 3 is less than 0.04 K / s, the temperature rise of electrical connection frame 2 is unqualified. The higher the cooling rate of cooling structure 3, the lower the temperature rise of electrical connection frame 2. However, when the cooling rate of the coolant is greater than 5 K / s, the temperature rise of electrical connection frame 2 does not decrease significantly. A higher cooling rate means a higher price and a more complex process. Therefore, the inventors set the cooling rate of cooling structure 3 to 0.04 K / s-5 K / s.

[0141] In some embodiments, a portion of the electrical connection frame 2 is flexible. This flexibility allows for larger bending angles on the electrical connection frame 2, facilitating its installation within vehicle bodies with large corners.

[0142] In some embodiments, the electrical connection frame 2 includes at least one bend, the presence of which makes it easier to arrange the electrical connection frame 2 in the vehicle body.

[0143] In some embodiments, one of the connectors 1 is a charging socket. With the increasing popularity of new energy vehicles, equipment and facilities for charging these vehicles have also developed. To meet the requirements of fast charging, the rechargeable batteries in new energy vehicles require a charging socket assembly. In this invention, one connector is a charging socket connected to a charging gun, and the other connector is a high-voltage connector connected to the rechargeable battery, thus achieving the purpose of charging the rechargeable battery.

[0144] This article also provides an electric vehicle, including the aforementioned connector assembly with liquid cooling function, a circulation pump 9, and a cooling device 10. The first chamber 51 and the second chamber 61 are respectively connected to the circulation pump 9 and the cooling device 10. The circulation pump 9 delivers cooling medium into the first chamber 51 to cool the electrical connection frame 2. The cooling medium flows out from the second chamber 61 at a relatively high temperature. After entering the cooling system, the temperature of the cooling medium drops and it is delivered back into the cooling chamber by the circulation pump 9, forming a complete cooling cycle.

[0145] Furthermore, the inlet pipe 83 is connected to the inlet of the circulation pump 9, the outlet of the circulation pump 9 is connected to the inlet of the cooling device 10, and the outlet of the cooling device 10 is connected to the outlet pipe 84.

[0146] While specific embodiments of the invention have been described in detail by way of examples, those skilled in the art should understand that the examples are for illustrative purposes only and not intended to limit the scope of the 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 invention. The scope of the invention is defined by the appended claims.

Claims

1. A connector assembly with liquid cooling function, comprising at least one electrical connection frame and connectors connected to both ends of the electrical connection frame, characterized in that, The outer periphery of the electrical connection skeleton is sequentially fitted with a first sleeve and a second sleeve. A first cavity is formed between the outer wall of the electrical connection skeleton and the inner wall of the first sleeve, and a second cavity is formed between the outer wall of the first sleeve and the inner wall of the second sleeve. Coolant flows through the first cavity and the second cavity. The connector also includes a shielding inner shell. The shielding inner shell is made of conductive metal or conductive plastic. The second sleeve is made of conductive metal or conductive plastic. The second sleeve is electrically connected to the shielding inner shell by crimping or welding. The first sleeve is made of conductive metal or conductive plastic. A shielding device is fitted over the end of the first sleeve. The first sleeve is electrically connected to the shielding inner shell through the shielding device.

2. The connector assembly with liquid cooling function according to claim 1, characterized in that, The connector includes connection terminals, and the electrical connection frame is electrically connected to the connection terminals by welding or crimping.

3. The connector assembly with liquid cooling function according to claim 1, characterized in that, The coolant is made of insulating material.

4. The connector assembly with liquid cooling function according to claim 1, characterized in that, The electrical connection frame is made of a rigid solid conductor material.

5. The connector assembly with liquid cooling function according to claim 1, characterized in that, A portion of the electrical connection skeleton is a flexible body.

6. The connector assembly with liquid cooling function according to claim 1, characterized in that, The electrical connection frame includes at least one bent portion.

7. The connector assembly with liquid cooling function according to claim 1, characterized in that, The cross-sectional shape of the electrical connection frame is polygonal, and all corners of the polygon are chamfered or rounded.

8. The connector assembly according to claim 1, characterized in that, The cross-sectional shape of the electrical connection frame is one or more of the following: elliptical, polygonal, B-shaped, D-shaped, N-shaped, O-shaped, P-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, arc-shaped, and wavy.

9. The connector assembly with liquid cooling function according to claim 1, characterized in that, The cross-sectional area of ​​the electrical connection frame is 1.5 mm. 2 -240mm 2 .

10. The connector assembly with liquid cooling function according to claim 1, characterized in that, The first sleeve and the second sleeve are made of rigid materials.

11. The connector assembly with liquid cooling function according to claim 1, characterized in that, The transfer impedance of the conductive metal or the conductive plastic is less than 100mΩ.

12. The connector assembly with liquid cooling function according to claim 1, characterized in that, The conductive plastic is a polymer material containing conductive particles. The conductive particles are made of one or more of the following: metal, conductive ceramic, carbon conductor, solid electrolyte, and mixed conductor. The polymer material contains tetraphenylethylene, polyvinyl chloride, polyethylene, polyamide, polytetrafluoroethylene, tetrafluoroethylene / hexafluoropropylene copolymer, ethylene / tetrafluoroethylene copolymer, polypropylene, polyvinylidene fluoride, polyurethane, polyterephthalic acid, polyurethane elastomer, styrene block copolymer, perfluoroalkoxyalkane, chlorinated polyethylene, polyphenylene sulfide, polystyrene, cross-linked polyolefin, and ethylene propylene. Rubber, ethylene / vinyl acetate copolymer, chloroprene rubber, natural rubber, styrene-butadiene rubber, nitrile rubber, silicone rubber, cis-butadiene rubber, isoprene rubber, ethylene-propylene rubber, butyl rubber, fluororubber, polyurethane rubber, polyacrylate rubber, chlorosulfonated polyethylene rubber, chloroether rubber, chlorinated polyethylene rubber, chlorosulfonated rubber, styrene-butadiene rubber, butadiene rubber, hydrogenated nitrile rubber, polysulfide rubber, cross-linked polyethylene, polycarbonate, polysulfone, polyphenylene ether, polyester, phenolic resin, urea-formaldehyde, styrene-acrylonitrile copolymer, polymethyl methacrylate, and polyoxymethylene resin, one or more of these.

13. The connector assembly with liquid cooling function according to claim 12, characterized in that, The metal contains one or more of the following: nickel, cadmium, zirconium, chromium, cobalt, manganese, aluminum, tin, titanium, zinc, copper, silver, gold, phosphorus, tellurium, and beryllium.

14. The connector assembly with liquid cooling function according to claim 12, characterized in that, The carbon-containing conductor contains one or more of the following: graphite silver, graphite powder, carbon nanotube materials, and graphene materials.

15. The connector assembly with liquid cooling function according to claim 1, characterized in that, The impedance between the second sleeve and the inner shield is less than 80mΩ.

16. The connector assembly with liquid cooling function according to claim 1, characterized in that, The shielding device has at least one first through hole in the axial direction of the electrical connection skeleton.

17. The connector assembly with liquid cooling function according to claim 16, characterized in that, The sum of the cross-sectional areas of the first through holes accounts for 5%-90% of the cross-sectional area of ​​the shielding device.

18. The connector assembly with liquid cooling function according to claim 1, characterized in that, At least one first support ring is provided inside the first cavity. The inner wall of the first support ring is in contact with the outer periphery of the electrical connection skeleton, and the outer wall of the first support ring is in contact with the inner wall of the first sleeve.

19. The connector assembly with liquid cooling function according to claim 18, characterized in that, The first support ring has at least one second through hole in the axial direction of the electrical connection skeleton.

20. The connector assembly with liquid cooling function according to claim 19, characterized in that, The sum of the cross-sectional areas of the second through holes accounts for 5%-90% of the cross-sectional area of ​​the first cavity.

21. The connector assembly with liquid cooling function according to claim 1, characterized in that, The second cavity is provided with at least one second support ring, the inner wall of the second support ring is in contact with the outer periphery of the first sleeve, and the outer wall of the second support ring is in contact with the inner wall of the second sleeve.

22. The connector assembly with liquid cooling function according to claim 21, characterized in that, The second support ring has at least one third through hole in the axial direction of the electrical connection skeleton.

23. The connector assembly with liquid cooling function according to claim 22, characterized in that, The sum of the cross-sectional areas of the third through holes accounts for 5%-90% of the cross-sectional area of ​​the second cavity.

24. The connector assembly with liquid cooling function according to claim 1, characterized in that, The first cavity is provided with at least one first support ring, and the second cavity is provided with at least one second support ring. The electrical connection skeleton, the first sleeve and the second sleeve have curved portions, and the first support ring and the second support ring are respectively provided at the two ends and the middle position of the arc of the curved portion.

25. The connector assembly with liquid cooling function according to claim 1, characterized in that, The thickness of the first sleeve and the second sleeve are respectively 0.1%-20% of the outer diameter of the electrical connection skeleton.

26. The connector assembly with liquid cooling function according to claim 1, characterized in that, The difference in cross-sectional area between the first cavity and the second cavity does not exceed 20%.

27. The connector assembly with liquid cooling function according to claim 1, characterized in that, The connector includes a first connector and a second connector connecting the two ends of the electrical connection skeleton. The first connector has a rotating cavity inside, which is in communication with both the first cavity and the second cavity. The second connector has an adapter cavity inside, which is in communication with the first cavity. A guide tube communicating with the second cavity is provided on the second sleeve. The guide tube passes through the outer wall of the second connector and extends to the outside of the second connector. An outlet tube communicating with the adapter cavity is provided on the outside of the second connector.

28. The connector assembly with liquid cooling function according to claim 27, characterized in that, The second cavity is connected to the end of the inlet tube and is sealed.

29. The connector assembly with liquid cooling function according to claim 1, characterized in that, The connector includes a first connector and a second connector connecting the two ends of the electrical connection skeleton. The first connector has a rotating cavity inside, which is in communication with both the first cavity and the second cavity. The second connector has an adapter cavity inside, which is in communication with the second cavity. The first sleeve has an inlet tube that communicates with the first cavity. The inlet tube passes through the side wall of the second sleeve and the outer wall of the second connector and extends to the outside of the second connector. The outside of the second connector has an outlet tube that communicates with the adapter cavity.

30. The connector assembly with liquid cooling function according to claim 29, characterized in that, The first cavity is sealed at the end of the inlet tube.

31. The connector assembly with liquid cooling function according to claim 27 or 29, characterized in that, A first sealing structure is provided between the inlet tube and the outlet tube and the second connector.

32. The connector assembly with liquid cooling function according to claim 1, characterized in that, A second sealing structure is provided between the connector and the second sleeve.

33. The connector assembly with liquid cooling function according to claim 1, characterized in that, The boiling point of the coolant is greater than or equal to 100°C.

34. The connector assembly with liquid cooling function according to claim 1, characterized in that, The coolant contains water, ethylene glycol, silicone oil, fluorinated liquid, castor oil, coconut oil, corn oil, cottonseed oil, flaxseed oil, olive oil, palm oil, peanut oil, grapeseed oil, rapeseed oil, safflower oil, sunflower oil, soybean oil, and decene. 4 One or more of the following acids: decenoic acid, myrcenoic acid, linalool acid, tetradecenoic acid, spermic acid, crude acid, palmitic acid, apigenic acid, oleic acid, octadecenoic acid, codenoic acid, sericite, cetyl oleate, erucic acid, nervonic acid, glycerol, transformer oil, axle oil, internal combustion engine oil or compressor oil.

35. The connector assembly with liquid cooling function according to claim 1, characterized in that, The cooling rate of the coolant on the electrical connection frame is 0.04 K / s-5 K / s.

36. The connector assembly with liquid cooling function according to claim 1, characterized in that, One of the connectors is a charging dock.

37. A vehicle, characterized in that, Includes a connector assembly with liquid cooling function as described in any one of claims 1-36, a circulation pump and a cooling device, wherein the first cavity or the second cavity is respectively connected to the circulation pump and the cooling device.

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