Charging cable and electric vehicle charging pile

Abstract

The utility model discloses a charging cable, which comprises a cable core and a sheath, the cable core is formed by twisting a power wire core, a control wire core, a ground wire, an auxiliary power wire and a return pipe, the sheath wraps the outer side of the cable core, a cooling pipe is sleeved on the outer side of a central conductor of the power wire core, and a medium flow channel is formed between the inner wall of the cooling pipe and the central conductor. The medium flow channel and the backflow pipe are both used for introducing a cooling medium, the flow directions of the cooling medium in the medium flow channel and the backflow pipe are opposite, and the backflow pipe and the cooling pipe further comprise a glass fiber braided tube layer with the inner wall facing the center conductor and a silicone tube layer tightly wrapping the outer side of the glass fiber braided tube layer. The number of the backflow pipes and the number of the power wire cores with the cooling pipes on the outer sides are both two, and the diameter of the backflow pipes is smaller than that of the cooling pipes. According to the utility model, the overall flexibility and temperature resistance of the cable can be improved, the conductor penetrating into the cooling pipe can be effectively prevented from damaging the pipe wall in the processing process, and the product quality is improved.

Description

Technical Field

[0001] This utility model relates to a charging cable, belonging to the field of new energy and energy-saving technology. Background Technology

[0002] Charging stations function similarly to gas pumps at gas stations. They can be fixed to the ground or walls and installed in public buildings, residential parking lots, or charging stations. They can charge various models of electric vehicles according to different voltage levels. Charging stations connect to charging heads via cables, thus charging the vehicles.

[0003] In the prior art, the cooling tubes in charging cables are generally made of fluoroplastics, such as one of FEP / PFA / PTFE. Although fluoroplastics have good temperature resistance and wear resistance, they are hard and not flexible enough, resulting in poor overall bending performance of the cable and making it inconvenient to use. Summary of the Invention

[0004] The technical problem this invention aims to solve is to provide a charging cable that improves the overall flexibility and temperature resistance of the cable, and effectively prevents conductors penetrating the cooling pipe during processing from damaging the pipe wall, thereby improving product quality.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: a charging cable, comprising: a cable core formed by twisting together a power core, a control core, a ground wire, an auxiliary power wire, and a return tube, and a sheath covering the outside of the cable core. A cooling tube is sleeved on the outside of the central conductor of the power core. A medium flow channel is formed between the inner wall of the cooling tube and the central conductor. Cooling medium is introduced into both the medium flow channel and the return tube, and the flow direction of the cooling medium in the medium flow channel and the return tube is opposite. The return tube and the cooling tube further comprise: a glass fiber braided tube layer with its inner wall facing the central conductor and a silicone tube layer tightly covering the outside of the glass fiber braided tube layer.

[0006] The following are further improvements to the above technical solution:

[0007] 1. In the above scheme, both the return pipe and the power core with a cooling pipe on the outside are provided with two wires, and the diameter of the return pipe is smaller than the diameter of the cooling pipe.

[0008] 2. In the above scheme, the fiberglass braiding density of the fiberglass braided tube layer is 90%~99%.

[0009] 3. In the above scheme, the silicone tube layer is extruded and coated onto the outside of the fiberglass braided tube layer.

[0010] 4. In the above scheme, the hardness of the silicone tube layer is 70 A ~ 85 A.

[0011] 5. In the above scheme, the center conductor includes a bare copper conductor and a conductor braid layer covering the outside of the bare copper conductor.

[0012] An electric vehicle charging station is also provided, including a charging cable connected between the station body and the charging gun.

[0013] Due to the application of the above technical solution, this utility model has the following advantages compared with the prior art:

[0014] This utility model of a charging cable has a cooling tube sleeved on the outside of the central conductor of the power core. A medium flow channel is formed between the inner wall of the cooling tube and the central conductor. Cooling medium is introduced into both the medium flow channel and the return pipe, and the flow direction of the cooling medium in the medium flow channel and the return pipe is opposite. Both the return pipe and the cooling tube further include: a glass fiber braided tube layer with its inner wall facing the central conductor and a silicone tube layer tightly wrapped around the outside of the glass fiber braided tube layer. While the heat generated by the conductor is quickly discharged through the cooling medium, the overall flexibility and temperature resistance of the cable can be improved. At the same time, the conductor entering the cooling tube during the processing can be effectively prevented from damaging the tube wall, thereby improving product quality. Attached Figure Description

[0015] Appendix Figure 1 This is a schematic diagram of the structure of the charging cable of this utility model;

[0016] Appendix Figure 2 This is a schematic diagram of the cooling pipe in the charging cable of this utility model;

[0017] Appendix Figure 3 This is a schematic diagram of the charging pile structure.

[0018] In the above attached diagram: 1. Power conductor; 11. Center conductor; 111. Bare copper conductor; 112. Conductor braided layer; 12. Cooling pipe; 13. Medium flow channel; 2. Control conductor; 3. Ground wire; 4. Auxiliary power line; 5. Return pipe; 6. Sheath; 7. Fiberglass braided tube layer; 8. Silicone tube layer; 10. Pile body; 14. Charging gun. Detailed Implementation

[0019] The present patent can be further understood through the specific embodiments given below, but they are not intended to limit the present patent.

[0020] Example 1: A charging cable includes: a cable core formed by twisting together a power core 1, a control core 2, a ground wire 3, an auxiliary power wire 4, and a return tube 5, and a sheath 6 covering the outside of the cable core. A cooling tube 12 is sleeved on the outside of the center conductor 11 of the power core 1. A medium flow channel 13 is formed between the inner wall of the cooling tube 12 and the center conductor 11. Cooling medium is introduced into both the medium flow channel 13 and the return tube 5, and the flow direction of the cooling medium in the medium flow channel 13 and the return tube 5 is opposite. The return tube 5 and the cooling tube 12 further include: a glass fiber braided tube layer 7 with its inner wall facing the center conductor 11 and a silicone tube layer 8 tightly covering the outside of the glass fiber braided tube layer 7.

[0021] The return pipe 5 and the power core 1 with the cooling pipe 12 on the outside are both provided with two wires, and the diameter of the return pipe 5 is smaller than the diameter of the cooling pipe 12.

[0022] The fiberglass braided tube layer 7 has a fiberglass braiding density of 98%.

[0023] The silicone tube layer 8 is extruded and coated onto the outside of the fiberglass braided tube layer 7.

[0024] The hardness of the silicone tube layer 8 is 75A.

[0025] The center conductor 11 includes a bare copper conductor 111 and a conductor braid layer 112 covering the outside of the bare copper conductor 111.

[0026] The charging cable is connected between the pile body 10 and the charging gun 14.

[0027] Example 2: An electric vehicle charging pile includes a charging cable connected between the pile body 10 and the charging gun 14. The charging cable includes a cable core formed by twisting together a power core 1, a control core 2, a ground wire 3, an auxiliary power wire 4, and a return pipe 5, and a sheath 6 covering the outside of the cable core. A cooling pipe 12 is sleeved on the outside of the central conductor 11 of the power core 1. A medium flow channel 13 is formed between the inner wall of the cooling pipe 12 and the central conductor 11. Cooling medium is introduced into both the medium flow channel 13 and the return pipe 5, and the flow direction of the cooling medium in the medium flow channel 13 and the return pipe 5 is opposite. The return pipe 5 and the cooling pipe 12 further include a glass fiber braided tube layer 7 with its inner wall facing the central conductor 11 and a silicone tube layer 8 tightly covering the outside of the glass fiber braided tube layer 7.

[0028] The return pipe 5 and the power core 1 with the cooling pipe 12 on the outside are both provided with two wires, and the diameter of the return pipe 5 is smaller than the diameter of the cooling pipe 12.

[0029] The fiberglass braided tube layer 7 has a fiberglass braiding density of 97%.

[0030] The hardness of the silicone tube layer 8 is 80A.

[0031] The silicone tube layer and the fiberglass braided tube layer can be bonded by extrusion process, or they can be bonded by applying glue. Fiberglass itself is more resistant to high temperatures and acts as an inner protection near the central conductor, which can prevent the tube wall from being scratched when the conductor is inserted into the cooling tube during processing.

[0032] By using the above-mentioned charging cable, the heat generated by the conductor can be quickly dissipated through the cooling medium, which can improve the overall flexibility and temperature resistance of the cable, and effectively prevent the conductor entering the cooling pipe during processing from damaging the pipe wall, thereby improving product quality.

[0033] The above embodiments are only for illustrating the technical concept and features of this utility model, and are intended to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be construed as limiting the scope of protection of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be included within the scope of protection of this utility model.

Claims

1. A charging cable comprising: A cable core formed by twisting a power line core (1), a control line core (2), a ground wire (3), an auxiliary power line (4) and a return pipe (5), and a sheath (6) covering the cable core, characterized in that: a cooling pipe (12) is sleeved outside a center conductor (11) of the power line core (1), a medium flow channel (13) is formed between the inner wall of the cooling pipe (12) and the center conductor (11), the medium flow channel (13) and the return pipe (5) are both used for passing in cooling medium, and the flow directions of the cooling medium in the medium flow channel (13) and the return pipe (5) are opposite, the return pipe (5) and the cooling pipe (12) further comprise: a glass fiber braided pipe layer (7) with the inner wall facing the center conductor (11), and a silica gel pipe layer (8) tightly covering the outside of the glass fiber braided pipe layer (7).

2. The charging cable of claim 1, wherein: The power line core (1) with the cooling pipe (12) outside and the return pipe (5) both are provided with two, and the diameter of the return pipe (5) is smaller than that of the cooling pipe (12).

3. The charging cable of claim 1, wherein: The glass fiber braided density of the glass fiber braided pipe layer (7) is 90%-99%.

4. The charging cable of claim 1, wherein: The silica gel pipe layer (8) is extruded and covered outside the glass fiber braided pipe layer (7).

5. The charging cable of claim 1, wherein: The hardness of the silica gel pipe layer (8) is 70A-85A.

6. The charging cable of claim 1, wherein: The center conductor (11) comprises a bare copper conductor (111) and a conductor braided layer (112) covering the outside of the bare copper conductor (111).

7. An electric vehicle charging station, characterized by: The charging cable connected between the pile body (10) and the charging gun (14) comprises the charging cable as claimed in any one of claims 1-6.

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