A charging gun structure based on graphene material

Abstract

The present invention relates to a charging gun structure based on graphene material, comprising a charging gun body, a charging connector arranged at the front end of the charging gun body, and a charging cable connected to the rear end of the charging gun body, wherein a charging connection hole is arranged inside the charging connector, and a cage-type ring-belt sleeve made of graphene metal material is nested and matched on the inner wall of the charging connection hole; the charging cable adopts Litz wire made of graphene metal material, and is formed by twisting or weaving a plurality of Litz wires into a fixed shape; the present invention adds a cage-type ring-belt sleeve made of graphene metal material to the traditional charging gun structure, thereby increasing the conductivity and improving the heat dissipation at the charging connector; at the same time, the charging cable also uses Litz wire made of graphene metal material, and the Litz wire has consistent winding and wiring performance, and the graphene material further improves the heat dissipation at the charging cable, effectively avoiding the charging gun from heating up significantly during use and affecting the safety of use.

Description

Technical Field

[0001] The present invention relates to the technical field of charging guns, and in particular to a charging gun structure based on graphene materials. Background Art

[0002] Based on the continuous development of new energy, in the field of pure electric vehicle fast charging, under high current conditions, the heat generated by the entire connector due to power-on will cause the temperature of the entire connector system to rise, and the temperature rise significantly affects the working performance of the connector; for high current connectors, the temperature rise effect is a key performance that must be considered; in actual use, the heat density comes from the male and female connectors and the energized cables, of which there are two parts with the highest heat density: first, the contact point of the contact pair; second, the crimping point between the terminal and the cable; therefore, for the charging gun used in the field of pure electric vehicle fast charging, the temperature increase not only affects the service life of the charging gun, but also affects the safety of use. The present invention has developed a charging gun structure based on graphene material to solve the problems existing in the prior art. After searching, no technical solutions identical or similar to the present invention were found. Summary of the invention

[0003] The purpose of the present invention is to provide a charging gun structure based on graphene material to solve the problem in the prior art that the charging gun heats up significantly during use, thereby affecting the service life and safety of use.

[0004] The technical solution of the present invention is: a charging gun structure based on graphene material, including a charging gun body, a charging connector arranged at the front end of the charging gun body, and a charging cable connected to the rear end of the charging gun body, a charging connection hole is arranged inside the charging connector, and a cage-type ring belt sleeve made of graphene metal material is nested and matched with the inner wall of the charging connection hole.

[0005] Preferably, the outer wall of the cage-type annular sleeve is a mesh structure, and a plurality of tensioning springs are evenly distributed in an annular shape on the outer ends of both ends.

[0006] Preferably, the charging cable is a Litz wire made of graphene metal material, and is formed by twisting or braiding a plurality of Litz wires.

[0007] Preferably, the cross-section of the Litz wire is selected from circular, rectangular or square.

[0008] Preferably, the graphene metal material is a composite material of graphene and copper, wherein the addition ratio of graphene in copper is less than 1%.

[0009] Compared with the prior art, the advantages of the present invention are:

[0010] (1) The present invention adds a cage-type ring-shaped sleeve made of graphene metal material to the traditional charging gun structure, which increases the conductivity and improves the heat dissipation at the charging connector, making it more reliable and durable under high temperature and long-term working conditions. At the same time, the charging cable also uses Litz wire made of graphene metal material. Litz wire has consistent winding and wiring performance, stable size and more economical to use. The graphene material also further improves the heat dissipation at the charging cable, effectively preventing the charging gun from heating up significantly during use and affecting the safety of use.

[0011] (2) The cross-section of the Litz wire can be selected from round, rectangular or square. The filling factor of the Litz wire with a rectangular or square cross-section is higher, which can make full use of the winding space. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The present invention will be further described below in conjunction with the accompanying drawings and embodiments:

[0013] Figure 1 A schematic diagram of a charging gun structure based on graphene material according to the present invention;

[0014] Figure 2 It is a structural schematic diagram of the cage-type annular sleeve of the present invention;

[0015] Figure 3 This is a schematic diagram of the charging cable of the present invention using a Litz wire with a circular cross-section and a circular end surface;

[0016] Figure 4 This is a schematic diagram of the charging cable of the present invention using Litz wires with circular cross-sections combined with rectangular end faces;

[0017] Figure 5 This is a schematic diagram of a charging cable of the present invention using a Litz wire with a rectangular cross-section and a rectangular end surface.

[0018] Among them: 1. Charging gun body, 2. Charging connector, 3. Charging cable, 4. Charging port, 5. Cage ring sleeve, 6. Tension spring, 7. Litz wire. DETAILED DESCRIPTION

[0019] The present invention is further described in detail below in conjunction with specific embodiments:

[0020] like Figure 1 As shown, a charging gun structure based on graphene material includes a charging gun body 1, a charging connector 2 arranged at the front end of the charging gun body 1, and a charging line 3 connected to the rear end of the charging gun body 1.

[0021] The charging connector 2 is provided with a charging port 4, and the inner wall of the charging port 4 is nested with a cage-type ring-shaped sleeve 5 made of graphene metal material; the charging cable 3 is made of Litz wire 7 made of graphene metal material, and is formed by twisting or weaving a plurality of Litz wires 7; wherein, the graphene metal material used in the cage-type ring-shaped sleeve 5 and the Litz wire 7 is a composite material of graphene and copper, and the addition ratio of graphene in copper is less than 1%; its electrical conductivity, mechanical properties and thermal conductivity are greatly improved compared with traditional copper materials. Taking the graphene copper-Litz wire 7 as an example, its relevant performance data are as follows:

[0022] Test items / units Numeric Thermal conductivity (W / m·K) 600～650 Electrical conductivity (%) 0.05mm~0.018mm 107％～119％ <![CDATA[Density (g / cm 3 )]]> 8.8 Sample size (line) 8mm~0.018mm Tensile strength(MPa) 133 Yield strength (MPa) 77 Elongation(%) 5～25 Vickers hardness (Hv) 70 Thermal expansion coefficient (ppm / ℃) 16.8

[0023] The relevant working parameters of the graphene copper-cage ring belt sleeve 5 are as follows:

[0024] Service life: 12000 times;

[0025] High voltage: 1000V;

[0026] Current: 500A;

[0027] Temperature rise: <40K.

[0028] like Figure 2 As shown, the outer wall of the cage-type ring belt sleeve 5 is a mesh structure, and a plurality of tensioning springs 6 are evenly distributed at the outer ends of the two ends in a ring shape. The cage-type ring belt sleeve 5 can be stably matched in the charging port 4 through the action of the tensioning springs 6; the cross section of the Litz wire 7 is selected from one of round, rectangular or square, such as Figure 3 , Figure 4 As shown, several Litz wires 7 with circular cross-sections can be combined to form a circular end face or a rectangular end face; Figure 5 As shown, several rectangular cross-section Litz wires 7 can be combined into a rectangular end face. At this time, the filling factor is very high, and the winding space can be fully utilized. Compared with the circular cross-section structure, the filling factor of the Litz wire 7 can be increased by 20%; the twisting or weaving methods of the Litz wire 7 combined to form the charging cable 3 mainly include the following: concentric single twisting, concentric composite twisting, transposed composite twisting, parallel molding, single winding molding, weaving molding, etc. The outer side can be coated with an insulating layer, or it can be directly shaped without coating.

[0029] The above embodiments are only for illustrating the technical concept and features of the present invention, and their purpose is to enable people familiar with this technology to understand the content of the present invention and implement it accordingly, and they cannot be used to limit the scope of protection of the present invention. For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is limited by the attached claims rather than the above description, and it is intended to include all changes within the meaning and scope of the equivalent elements of the claims in the present invention.

Claims

1. A charging gun structure based on graphene material, comprising a charging gun body, a charging connector arranged at the front end of the charging gun body, and a charging line connected to the rear end of the charging gun body, characterized in that: The charging connector is provided with a charging connection hole inside, and the inner wall of the charging connection hole is nested with a cage-type ring belt sleeve made of graphene metal material; The outer wall of the cage-type ring-belt sleeve is a mesh structure, and a number of tension springs are evenly distributed in a ring shape on the outer ends of both ends; the charging cable is a Litz wire made of graphene metal material, and is formed by twisting or weaving a number of Litz wires; the graphene metal material is a composite material of graphene and copper.

2. The graphene-based charging gun structure according to claim 1, characterized in that: The cross section of the Litz wire is selected from one of circular, rectangular or square.

3. The graphene-based charging gun structure according to claim 1, characterized in that: In the graphene metal material, the addition ratio of graphene in copper is less than 1%.

Images