Liquid-cooled charging cable

Abstract

The utility model discloses a liquid cooling type charging cable, which comprises a cable core and a sheath layer, the cable core is formed by twisting a plurality of power wire cores, a plurality of control wire cores and a ground wire, the sheath layer wraps the outer side of the cable core, and a cooling pipe is sleeved on the outer side of a central conductor of each power wire core at intervals. A cooling channel for introducing a cooling medium is formed between the inner wall of the cooling pipe and the outer side surface of the central conductor, a plurality of raised lines extending along the length direction of the cooling pipe are arranged on the inner wall of the cooling pipe, and the plurality of raised lines are arranged at intervals in the circumferential direction; and therefore, a guide flow channel is formed between any two adjacent raised lines in the cooling channel. According to the utility model, heat generated by the central conductor can be timely discharged out, the fluidity of the cooling medium in the cooling channel and the contact area between the cooling medium and the heat dissipation surface can be improved while the distribution uniformity of the cooling medium is ensured, and the cooling effect on the heat is improved.

Description

Technical Field

[0001] The utility model relates to a liquid-cooled charging cable, belonging to the technical field of new energy and energy conservation. Background Art

[0002] With the continuous increase in the production and sales volume of new energy vehicles, charging piles have become important infrastructure and also the biggest shortcoming restricting the rapid promotion of new energy vehicles. In the past two years, the lag in the development of charging piles, the basic supporting facilities for charging new energy vehicles, has become increasingly prominent. Moreover, at present, the charging time of most charging piles is relatively long. Therefore, high-power fast charging technology has emerged as the times require. As the carrier for charging piles to transmit electric energy, the safety performance of the cable plays an important role in the basic charging support and the safety of charging stations. The cable for charging piles has a large load current value, and the conductor is prone to heat generation. During use, especially when used at high frequencies, problems such as spontaneous combustion of the cable may occur. Content of the Utility Model

[0003] The technical problem to be solved by the utility model is to provide a liquid-cooled charging cable, which can timely discharge the heat generated by the central conductor to the outside, and can also improve the fluidity in the cooling channel and the contact area with the heat dissipation surface while ensuring the uniformity of the distribution of the cooling medium, thereby improving the cooling effect on the heat.

[0004] To solve the above technical problem, the technical solution adopted by the utility model is: a liquid-cooled charging cable, comprising: a cable core formed by stranding a plurality of power cores, a plurality of control cores and a ground wire, and a sheath layer covering the outside of the cable core. A cooling pipe is sleeved at intervals outside the central conductor of the power core, so as to form a cooling channel for introducing a cooling medium between the inner wall of the cooling pipe and the outer surface of the central conductor. A plurality of ribs extending along the length direction are arranged on the inner wall of the cooling pipe, and the plurality of ribs are arranged at intervals in the circumferential direction, so as to form a guiding flow channel between any two adjacent ribs in the cooling channel.

[0005] The further improved solutions in the above technical solutions are as follows:

[0006] 1. In the above solution, the rib is arranged at an interval from the central conductor of the power core.

[0007] 2. In the above solution, the cooling pipe further comprises: an inner pipe layer in contact with the cooling medium on the inner wall and an outer pipe layer tightly arranged outside the inner pipe layer, and the rib is arranged on the inner wall of the inner pipe layer.

[0008] 3. In the above solution, the inner pipe layer is a PTFE inner pipe layer, and the outer pipe layer is a TPU outer pipe layer.

[0009] 4. In the above solution, the sheath layer is a TPU sheath layer or a TPE sheath layer.

[0010] 5. In the above solution, the central conductor of the power core includes a bare copper conductor and a conductor braid layer coated on the outer side of the bare copper conductor.

[0011] Due to the application of the above technical solution, the utility model has the following advantages compared with the prior art:

[0012] For the liquid-cooled charging cable of the utility model, a cooling pipe is sleeved at intervals outside the central conductor of the power core, so that a cooling channel for introducing a cooling medium is formed between the inner wall of the cooling pipe and the outer surface of the central conductor. A plurality of ribs extending along the length direction are arranged on the inner wall of the cooling pipe, and the plurality of ribs are arranged at intervals in the circumferential direction, so that a guiding flow channel is formed between any two adjacent ribs in the cooling channel. On the basis of realizing the transmission of high-power electric energy, the heat generated by the central conductor can be discharged outwards in time, and the fluidity of the cooling medium in the cooling channel and the contact area with the heat dissipation surface can be improved while ensuring the uniformity of the distribution of the cooling medium, so as to improve the cooling effect on the heat and thus improve the power supply efficiency and the safety of power use. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Att Figure 1 is a schematic structural diagram of the liquid-cooled charging cable of the utility model;

[0014] Att Figure 2 is a schematic enlarged view of a partial structure in the liquid-cooled charging cable of the utility model;

[0015] Att Figure 3 is a schematic enlarged view of the structures of the power core and the ground wire in the liquid-cooled charging cable of the utility model.

[0016] In the above drawings: 1. Power core; 11. Central conductor; 111. Bare copper conductor; 112. Conductor braid layer; 12. Cooling pipe; 2. Control core; 3. Ground wire; 4. Sheath layer; 5. Cooling channel; 61. Inner pipe layer; 62. Outer pipe layer; 7. Rib; 8. Guiding flow channel; 9. Conductor; 10. Insulating layer. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0017] The following specific examples can further clearly understand the present patent, but they do not limit the present patent.

[0018] Embodiment 1: A liquid-cooled charging cable, comprising: a cable core formed by stranding a plurality of power cores 1, a plurality of control cores 2 and a ground wire 3, and a sheath layer 4 covering the outside of the cable core. A cooling pipe 12 is sleeved at intervals outside the central conductor 11 of the power core 1, so that a cooling channel 5 for introducing a cooling medium is formed between the inner wall of the cooling pipe 12 and the outer surface of the central conductor 11. A plurality of ridges 7 extending along the length direction are arranged on the inner wall of the cooling pipe 12, and the plurality of ridges 7 are arranged at intervals in the circumferential direction, so that a guiding flow channel 8 is formed between any two adjacent ridges 7 in the cooling channel 5.

[0019] The above-mentioned ridge 7 is arranged at intervals from the central conductor 11 of the power core 1;

[0020] The above-mentioned cooling pipe 12 further comprises: an inner pipe layer 61 whose inner wall is in contact with the cooling medium and an outer pipe layer 62 tightly arranged outside the inner pipe layer 61, and the above-mentioned ridge 7 is arranged on the inner wall of the inner pipe layer 61;

[0021] The above-mentioned inner pipe layer 61 is a PTFE inner pipe layer, and the above-mentioned outer pipe layer 62 is a TPU outer pipe layer;

[0022] The traditional cooling pipe using fluoroplastics has a high temperature resistance grade, but the material has a large hardness and a large bending stress. After stranding, the cable is relatively rigid, the bending radius is relatively large, there are differences in stress during left and right twisting, and the reverse twisting torque is too large, resulting in a poor operation experience;

[0023] Adopting a composite structure, the inner layer of fluoroplastics has a temperature grade above 200°C and a melting point exceeding 300°C. Local overheating of the conductor will not cause the cooling pipe to rupture. The TPU is relatively soft and has a relatively small elastic modulus, which significantly improves the softness of the composite pipe, makes the cable after stranding have good softness, and improves the torsional directionality;

[0024] The above-mentioned sheath layer 4 is a TPU sheath layer;

[0025] The above-mentioned control core 2 and ground wire 3 both include a conductor 9 and an insulating layer 10 arranged outside the conductor 9.

[0026] Embodiment 2: A liquid-cooled charging cable, comprising: a cable core formed by stranding a plurality of power cores 1, a plurality of control cores 2 and a ground wire 3, and a sheath layer 4 covering the outside of the cable core. A cooling pipe 12 is sleeved at intervals outside the central conductor 11 of the power core 1, so that a cooling channel 5 for introducing a cooling medium is formed between the inner wall of the cooling pipe 12 and the outer surface of the central conductor 11. A plurality of ridges 7 extending along the length direction are arranged on the inner wall of the cooling pipe 12, and the plurality of ridges 7 are arranged at intervals in the circumferential direction, so that a guiding flow channel 8 is formed between any two adjacent ridges 7 in the cooling channel 5.

[0027] The above-mentioned sheath layer 4 is a TPE sheath layer;

[0028] The central conductor 11 of the above-mentioned power core 1 includes a bare copper conductor 111 and a conductor braid layer 112 coated on the outer side of the bare copper conductor 111;

[0029] The cooling pipe 12 of the above-mentioned power core 1 is coaxially arranged with the central conductor 11; Four of the above-mentioned power cores 1 are sequentially arranged along the circumferential direction in the sheath layer 4, and the cooling pipes 12 of adjacent power cores 1 are in pressing contact with each other.

[0030] By using the above-mentioned liquid-cooled charging cable, on the basis of realizing the transmission of high-power electric energy, the heat generated by the central conductor can be discharged out in time, and the distribution uniformity of the cooling medium can be ensured while improving its fluidity in the cooling channel and the contact area with the heat dissipation surface, improving the cooling effect on the heat, thereby improving the power supply efficiency and the safety of power consumption.

[0031] The above embodiments are only used to illustrate the technical concept and characteristics of the present invention, and the purpose is to enable those skilled in the art to understand the content of the present invention and implement it accordingly, and cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.

Claims

1. A liquid-cooled charging cable, comprising: A cable core formed by stranding a plurality of power cores (1), a plurality of control cores (2) and a ground wire (3), and a sheath layer (4) covering the outside of the cable core, characterized in that: a cooling pipe (12) is sleeved at intervals outside the central conductor (11) of the power core (1), so that a cooling channel (5) for introducing a cooling medium is formed between the inner wall of the cooling pipe (12) and the outer surface of the central conductor (11), and a plurality of ridges (7) extending along the length direction are arranged on the inner wall of the cooling pipe (12), and the plurality of ridges (7) are arranged at intervals in the circumferential direction, so that a guiding flow channel (8) is formed between any two adjacent ridges (7) in the cooling channel (5).

2. The liquid-cooled charging cable according to claim 1, wherein: The ridge (7) is arranged at intervals from the central conductor (11) of the power core (1).

3. The liquid-cooled charging cable according to claim 1, characterized in that: The cooling pipe (12) further includes: an inner pipe layer (61) whose inner wall is in contact with the cooling medium and an outer pipe layer (62) tightly arranged outside the inner pipe layer (61), and the ridge (7) is arranged on the inner wall of the inner pipe layer (61).

4. The liquid-cooled charging cable according to claim 3, wherein: The inner pipe layer (61) is a PTFE inner pipe layer, and the outer pipe layer (62) is a TPU outer pipe layer.

5. The liquid-cooled charging cable according to claim 1, characterized in that: The sheath layer (4) is a TPU sheath layer or a TPE sheath layer.

6. The liquid-cooled charging cable according to claim 1, wherein: The central conductor (11) of the power core (1) includes a bare copper conductor (111) and a conductor braided layer (112) covering the outside of the bare copper conductor (111).

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