Liquid cooling heat dissipation terminal structure for charging gun

Abstract

The utility model relates to the technical field of charging equipment, in particular to a liquid cooling heat dissipation terminal structure for a charging gun, which comprises a plug-in head part and a fixed tail part which are integrally connected, a liquid circulation cavity is arranged in the fixed tail part, two ends of the liquid circulation cavity are respectively communicated with a liquid inlet and a liquid outlet, and the liquid inlet and the liquid outlet are communicated with the plug-in head part and the fixed tail part. A Gyandroid minimum curved surface porous structure is arranged between the liquid inlet and the liquid outlet, cooling liquid flow can penetrate through the Gyandroid minimum curved surface porous structure from the liquid inlet to the liquid outlet, and the liquid inlet is closer to the plug head than the liquid outlet; compared with a foamy copper structure, the Gyandroid minimal curved surface porous structure arranged by 3D printing is controllable in pore size and uniform in unit cell distribution, a plurality of mutually communicated cooling liquid channels are formed in the terminal, the flow direction of cooling liquid is reasonably designed, the temperature of the terminal can be effectively reduced, the service life of the terminal is prolonged, and the service life of the terminal is prolonged. The internal pore structure of the terminal can be flexibly customized according to factors such as different charging scenes and power requirements, and diversified market requirements are met.

Description

TECHNICAL FIELD

[0001] The utility model relates to charging equipment technical field especially a liquid cooling heat dissipation terminal structure for charging gun. BACKGROUND

[0002] With the rapid popularization of electric vehicles, the demand for vehicle charging is becoming larger and larger, and the charging gun as a key component connecting electric vehicles and charging piles has increasingly improved performance requirements. In the charging process, the terminal of the charging gun will pass through a large current, thereby generating a large amount of heat. If the heat cannot be dissipated in time and effectively, the temperature of the terminal will be too high, which will affect the charging efficiency on the one hand, prolong the charging time, and on the other hand, may damage the terminal, shorten the service life of the charging gun, and even cause safety accidents. Liquid cooling super charging technology is a leading charging solution, which is known for its high energy density and instantaneous charging characteristics, can significantly shorten the charging time, and improve the energy conversion efficiency during the charging process. With the continuous increase of super charging power, the temperature of the terminal will rise rapidly. If the liquid flow and the inner diameter of the cable are increased to reduce the temperature of the terminal, the process requirements of the charging gun will be improved, the manufacturing difficulty will be increased, and at the same time, the outer diameter of the charging cable will be thickened, which is not convenient to use. Therefore, it is necessary to improve the technology to more effectively improve the heat dissipation performance of the terminal. SUMMARY

[0003] The utility model aims at providing a novel liquid cooling heat dissipation terminal for charging gun, which has greatly improved heat dissipation performance compared with the prior art.

[0004] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme:

[0005] A liquid cooling heat dissipation terminal structure for charging gun, comprising an integrated plug-in head and a fixed tail, a liquid flow cavity is arranged in the fixed tail, the two ends of the liquid flow cavity are respectively communicated with a liquid inlet and a liquid outlet, a Gyroid minimal surface porous structure is arranged between the liquid inlet and the liquid outlet, and the cooling liquid flow can pass through the Gyroid minimal surface porous structure from the liquid inlet to the liquid outlet.

[0006] The liquid inlet is closer to the plug-in head than the liquid outlet.

[0007] Further, the Gyroid minimal surface porous structure is cylindrical in shape and is arranged in the liquid flow cavity which is also cylindrical in shape, and the Gyroid minimal surface porous structure is integrally formed with the fixed tail or is connected with the fixed tail by welding.

[0008] Further, the liquid inlet is arranged on the side surface of the liquid flow cavity and is located between the plug-in head and the liquid outlet.

[0009] Further, the plug-in head is an internal solid structure, and a circular arc chamfer is arranged at the head end away from the fixed tail.

[0010] Further, the periphery of the plug-in head and the fixed tail is provided with a plurality of parallel annular recessed clamping grooves.

[0011] Further, the periphery of the liquid outlet is provided with a plurality of annular protruding edges, and the cross section of the annular protruding edge is barb-shaped.

[0012] Further, the Gyroid minimal surface porous structure coincides with the central axis of the liquid flow cavity.

[0013] Further, the plug-in head, the fixed tail and the Gyroid minimal surface porous structure are integrally formed by 3D printing.

[0014] Further, the 3D printing is a BJP process.

[0015] Further, the caliber of the liquid outlet is greater than or equal to the caliber of the liquid flow cavity, so that the Gyroid minimal surface porous structure is conveniently installed into the liquid flow cavity.

[0016] The beneficial effects of the technical scheme of the utility model are as follows:

[0017] Compared with the foam copper structure, the Gyroid minimal surface porous structure provided by the utility model for the liquid cooling heat dissipation terminal of the charging gun is controllable in size, the cell distribution is uniform, a plurality of cooling liquid channels are formed in the terminal, the cooling liquid flows from the liquid inlet to the liquid outlet through the Gyroid minimal surface porous structure, the cooling liquid flow direction is reasonable, the terminal temperature and thermal resistance can be effectively reduced, the problems such as material aging, oxidation and mechanical performance decline caused by high temperature of the terminal can be reduced, the service life of the terminal is significantly prolonged, the maintenance cost and replacement frequency of the charging gun are reduced, the high temperature is avoided to be transmitted to the charging cable, the safety hazards such as skin melting and insulation performance decline of the cable are prevented, reliable safety protection is provided for the charging of the new energy automobile, in addition, the advantages of the 3D printing technology are used, the internal porous structure of the terminal can be flexibly customized according to different charging scenes, power requirements and other factors, the diversified market demand is adapted, and the utility model has wide market application prospect. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical scheme of the utility model embodiment, the following will briefly introduce the drawings needed to be used in the embodiment description, and obviously, the drawings in the following description are only some embodiments of the utility model, and those skilled in the art can obtain other drawings according to the drawings without paying creative labor.

[0019] Figure 1 is a schematic diagram of the three-dimensional structure of the present application;

[0020] Figure 2 is a schematic diagram of the cross-sectional structure of the present application;

[0021] Figure 3 is a schematic diagram of the structure of the prior art foam copper;

[0022] Figure 4 is a schematic diagram of the structure of the Gyroid minimal surface porous structure in the present application;

[0023] Figure 5 is a schematic diagram of the connection state of the present application and the charging gun;

[0024] In the figure: 1: plug head; 2: fixed tail; 2a: liquid flow cavity; 2b: liquid inlet; 2c: liquid outlet; 3: Gyroid minimal surface porous structure; 4: annular recessed clamping groove; 5: annular protruding edge. DETAILED DESCRIPTION

[0025] The present application will now be described in further detail with reference to the accompanying drawings. These drawings are all simplified schematic diagrams, and only illustrate the basic structure of the present application in a schematic manner, and therefore only show the components related to the present application. The present application is described in detail using structural schematic diagrams, and the schematic diagrams are only examples, which should not limit the scope of protection of the present application.

[0026] Please refer to Figures 1-5The utility model provides a kind of liquid cooling heat dissipation terminal structure for charging gun, embodiment one: including integral connection's plug-in head 1 and fixed tail 2, liquid flow cavity 2a is provided in fixed tail 2, the both ends of liquid flow cavity 2a are communicated with liquid inlet 2b and liquid outlet 2c respectively, Gyroid minimal surface porous structure 3 is arranged between liquid inlet 2b and liquid outlet 2c, the periphery of Gyroid minimal surface porous structure 3 is cylindrical, is arranged in the liquid flow cavity 2a of inner periphery cylindrical, the connection mode of Gyroid minimal surface porous structure 3 and fixed tail 2 is: integrally formed, Gyroid minimal surface porous structure 3 coincides with the central axis of liquid flow cavity 2a, specifically, plug-in head 1, fixed tail 2 and Gyroid minimal surface porous structure 3 are integrally formed by 3D printing mode, the 3D printing mode used in the embodiment includes but is not limited to BJP process, 3D printing mode is compared with the welding mode without soldering agent residue, reduces contact welding thermal resistance, can build complex internal structure in one forming process, avoids complex assembly link, improves production efficiency, while guaranteeing the integrity and sealing of structure, reduces the risk of coolant leakage, and traditional laser cladding printing mode prints porous microstructure and is prone to capillary effect, and hole is filled with molten metal liquid.

[0027] Specific comparison Figure 3 、 Figure 4 As shown in the figure, the structure parameter of copper foam in prior art is difficult to fix, and only porosity can be controlled, and 3D printing of specified design structure is compared with controllable pore size of copper foam, and cell structure is uniformly distributed, which can effectively reduce terminal temperature and thermal resistance, and Gyroid minimal surface porous structure 3 forms a plurality of cooling liquid channels interconnected, and the direction of channel is optimized according to the result of heat flow simulation analysis, to ensure that the cooling liquid can maximize the heat generated by the terminal.

[0028] Meanwhile, liquid inlet 2b is arranged on the side of liquid flow cavity 2a, and it is located between plug-in head 1 and liquid outlet 2c, so that liquid inlet 2b is closer to plug-in head 1 than liquid outlet 2c, cooling liquid flows from liquid inlet 2b to liquid outlet 2c through Gyroid minimal surface porous structure 3, and the direction of cooling liquid flow is reasonable.

[0029] Further optimization scheme, the plug-in head 1 is an internal solid structure, in order to facilitate the plug-in of the terminal, the head end away from the fixed tail 2 is provided with a circular arc chamfer, has good plug-in adaptability, the surface can be provided with a plating layer to enhance the oxidation resistance and wear resistance. The periphery of the plug-in head 1 and the fixed tail 2 is provided with a plurality of parallel annular recessed clamping grooves 4, which is convenient for fixing in the plastic part of the charging gun. The periphery of the liquid outlet 2c is provided with a plurality of annular protruding edges 5, the cross section of the annular protruding edge 5 is barbed, which is convenient for connecting with the cooling liquid pipeline. The material of the plug-in head 1, the fixed tail 2 and the Gyroid minimal surface porous structure 3 is red copper, the red copper has excellent electrical conductivity, thermal conductivity, also has excellent processing performance: excellent plasticity, easy to hot and cold pressure processing, can be cold, hot plastic processing into various shaped terminals, suitable for mass production, also has good weldability, convenient for connecting with other parts, conducive to the assembly production of the charging gun.

[0030] Example two: different from example one, the connection mode of the Gyroid minimal surface porous structure 3 and the fixed tail 2 is welding. In this embodiment, the caliber of the liquid outlet 2c is greater than or equal to the caliber of the liquid flow cavity 2a, which is convenient for the Gyroid minimal surface porous structure 3 to be inserted into the liquid flow cavity 2a from the liquid outlet 2c, and after installation in place, welding is carried out, and compared with the 3D printing integrated molding mode, the cost is low.

[0031] When the charging current continuously increases, a large amount of heat will be quickly accumulated at the terminal due to the resistance heating, which not only causes the temperature of the terminal to rise sharply, affects the electrical conductivity and mechanical properties of the terminal, and long-term high temperature also accelerates the aging and oxidation of the terminal material, shortens the service life. The liquid cooling heat dissipation terminal structure for the charging gun of the utility model, through parameter setting to model, the minimal surface porous structure with appropriate aperture and porosity is generated, the structure wall thickness is currently 0.15mm-0.35mm, and the gap is 0.1mm-0.2mm; the heat sink structure of the minimal surface is increased in the terminal cold liquid channel, which can effectively increase the contact area of the terminal and the cooling liquid, thereby reducing the temperature of the terminal, without increasing the liquid flow and expanding the copper core cross section of the cable, the design temperature meeting the standard requirements can be obtained, and the material and process cost of the charging gun can be effectively reduced. The liquid enters through the middle hole of the terminal, flows out to the cable through the porous structure, and the purpose of reducing the temperature of the terminal is achieved, which ensures the stable operation of the charging gun under high-power charging.

[0032] The scheme can break through the limitation of traditional manufacturing process by using 3D printing technology, and realize individual customization of internal pore structure of the terminal. According to different charging power requirements, terminal size and heat distribution characteristics, the size, shape, density and distribution of the pores are accurately designed. When the charging gun is inserted into the charging interface of the new energy vehicle to charge and conduct, the terminal starts to heat, the cooling liquid pump is started, and the cooling liquid is driven to flow along the Gyroid minimum surface porous pore structure 3 small channel, the cooling liquid rapidly absorbs the heat of the terminal to become high-temperature cooling liquid, the high-temperature cooling liquid flows out of the terminal and is cooled again to be pumped into the terminal, so as to circulate repeatedly, continuously take away the heat of the terminal, and ensure that the temperature of the terminal is within a safe range.

[0033] The above merely describes the preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. It should be pointed out that, for those skilled in the art, without departing from the concept of the present application, changes, modifications or additions should all belong to the protection scope of the present application.

Claims

1. A liquid-cooled heat dissipation terminal structure for a charging gun, characterized by: The plug-in head (1) and the fixed tail (2) are integrally connected, the liquid flow cavity (2a) is arranged in the fixed tail (2), the liquid inlet (2b) and the liquid outlet (2c) are arranged at two ends of the liquid flow cavity (2a) respectively, the Gyroid minimal surface porous structure (3) is arranged between the liquid inlet (2b) and the liquid outlet (2c), and the cooling liquid flow can pass through the Gyroid minimal surface porous structure (3) from the liquid inlet (2b) to the liquid outlet (2c). The liquid inlet (2b) is closer to the plug-in head (1) than the liquid outlet (2c).

2. The liquid-cooled heat dissipation terminal structure for a charging gun according to claim 1, characterized in that: The Gyroid minimal surface porous structure (3) is cylindrical in the whole periphery and is arranged in the liquid flow cavity (2a) which is also cylindrical in the whole periphery, the Gyroid minimal surface porous structure (3) is integrally formed with the fixed tail (2) or is connected with the fixed tail (2) through welding.

3. The liquid-cooled heat dissipation terminal structure for a charging gun according to claim 1, characterized in that: The liquid inlet (2b) is arranged on the side of the liquid flow cavity (2a) and is located between the plug-in head (1) and the liquid outlet (2c).

4. The liquid-cooled heat dissipation terminal structure for a charging gun according to claim 3, characterized in that: The plug-in head (1) is solid in the inside, and the head end away from the fixed tail (2) is provided with a circular arc chamfer.

5. The liquid-cooled heat dissipating terminal structure for a charging gun according to claim 4, characterized in that: The plug-in head (1) and the fixed tail (2) are each provided with a plurality of parallel annular recessed clamping grooves (4) in the whole periphery.

6. The liquid-cooled heat dissipating terminal structure for a charging gun according to claim 5, characterized in that: The liquid outlet (2c) is provided with a plurality of annular protruding edges (5) in the whole periphery, and the cross section of the annular protruding edge (5) is in the form of a barb.

7. The liquid-cooled heat dissipating terminal structure for a charging gun according to claim 2, characterized by: The Gyroid minimal surface porous structure (3) coincides with the central axis of the liquid flow cavity (2a).

8. The liquid-cooled heat dissipating terminal structure for a charging gun according to claim 7, characterized in that: The plug-in head (1), the fixed tail (2) and the Gyroid minimal surface porous structure (3) are integrally formed through 3D printing.

9. The liquid-cooled heat dissipating terminal structure for a charging gun according to claim 8, characterized in that: The 3D printing is the BJP process.

10. The liquid-cooled heat dissipating terminal structure for a charging gun according to claim 7, characterized by: The caliber of the liquid outlet (2c) is greater than or equal to the caliber of the liquid flow cavity (2a).

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