High power charging cable

Abstract

The utility model discloses a high-power charging cable, comprising: a cable core formed by twisting 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 tube is sleeved at intervals on the outside of the central conductor of the power core, so that a cooling channel for passing a cooling medium is formed between the inner wall of the cooling tube and the outer surface of the central conductor, and the cooling tube further comprises: an inner tube layer whose inner wall contacts the cooling medium and an outer tube layer tightly arranged on the outer side of the inner tube layer, and the outer surface of the inner tube layer is connected to the inner wall of the outer tube layer by a plurality of mutually embedded protrusions and grooves. The utility model improves the structural strength and stability of the cooling tube by double-layer composite, and at the same time improves the bonding force between the inner and outer layers of the cooling tube, thereby ensuring the stability of the medium circulation in the cooling channel during long-term use.

Description

Technical Field

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

[0002] With the continuous increase in the production and sales of new energy vehicles, charging piles have become an important infrastructure, and also the biggest shortcoming that restricts the rapid advancement of new energy vehicles. In the past two years, the development of charging piles, the basic supporting facilities for charging new energy vehicles, has become increasingly lagging, and most charging piles at this stage have a long charging time. Therefore, high-power fast charging technology has emerged. Charging cables are the carriers of electric energy for charging piles, and the safety performance of the cables plays an important role in the safety of basic charging facilities and charging stations.

[0003] Existing cables for charging new energy sources usually use high-power, high-current cables in order to overcome the defect of long charging time. However, the heat dissipation of existing cables for charging new energy sources usually adopts natural heat dissipation, which causes heating, aging and damage to the cable body, posing a major safety hazard. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a high-power charging cable, which improves the structural strength and stability of the cooling pipe by double-layer composite, and at the same time improves the bonding force between the inner and outer layers of the cooling pipe, thereby ensuring the stability of the medium circulation in the cooling channel during long-term use.

[0005] In order to solve the above technical problems, the technical solution adopted by the utility model is: a high-power charging cable, comprising: a cable core formed by twisting a plurality of power cores, a plurality of control cores and a ground wire, and a sheath layer wrapped around the outside of the cable core, a cooling tube is sleeved on the outside of the central conductor of the power core, so that a cooling channel for passing a cooling medium is formed between the inner wall of the cooling tube and the outer surface of the central conductor, the cooling tube further comprises: an inner tube layer whose inner wall contacts the cooling medium and an outer tube layer tightly arranged on the outside of the inner tube layer, the outer surface of the inner tube layer and the inner wall of the outer tube layer are connected by a plurality of mutually embedded protrusions and grooves.

[0006] The further improved scheme in the above technical scheme is as follows:

[0007] 1. In the above solution, the cooling tube of the power core is coaxially arranged with the central conductor.

[0008] 2. In the above solution, the protrusions are arranged at intervals along the circumferential direction on the outer surface of the inner tube layer and / or the inner wall of the outer tube layer.

[0009] 3. In the above solution, a plurality of protrusions are spirally distributed on the outer surface of the inner tube layer, and a plurality of grooves corresponding to the protrusions are arranged on the inner wall of the outer tube layer.

[0010] 4. In the above solution, the four power line cores are arranged in sequence along the circumferential direction in the sheath layer, and the cooling tubes of adjacent power line cores are pressed against each other.

[0011] 5. In the above scheme, a wrapping layer is provided between the sheath layer and the cable core, and the wrapping layer is formed by tightly wrapping a non-woven fabric tape or an aluminum alloy tape around the outer side of the cable core.

[0012] Due to the application of the above technical solution, the utility model has the following advantages compared with the prior art:

[0013] The utility model discloses a high-power charging cable, in which a cooling tube is sleeved at intervals on the outer side of the central conductor of the power line core, so that a cooling channel for passing a cooling medium is formed between the inner wall of the cooling tube and the outer surface of the central conductor, and the cooling tube further comprises: an inner tube layer whose inner wall contacts the cooling medium and an outer tube layer tightly arranged on the outer side of the inner tube layer, the outer surface of the inner tube layer and the inner wall of the outer tube layer are connected by a plurality of mutually embedded protrusions and grooves, and while the structural strength and stability of the cooling tube are improved by double-layer composite, the bonding force between the inner and outer layers of the cooling tube is improved, so as to ensure the stability of the medium flow in the cooling channel during long-term use, and ensure the balance and stability of the heat dissipation effect on the central conductor; in addition, a plurality of protrusions are spirally distributed on the outer surface of the inner tube layer, and a plurality of grooves corresponding to the protrusions are arranged on the inner wall of the outer tube layer, which can further improve the stability of the cooling tube structure under complex working conditions such as long-term bending and twisting, avoid the interference of the inner and outer layers of the cooling tube with the cooling medium in the cooling channel, and improve the uniformity and stability of heat dissipation. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Attached Figure 1 This is a schematic diagram of the structure of the high-power charging cable of the utility model;

[0015] Attached Figure 2 This is an enlarged schematic diagram of the structure of the cooling tube in the high-power charging cable of the utility model;

[0016] Attached Figure 3 It is an enlarged schematic diagram of the structure of the central conductor of the power core of the cable of the utility model;

[0017] Attached Figure 4 It is an enlarged schematic diagram of the structure of the control wire core and the ground wire in the high-power charging cable of the utility model.

[0018] In the above figures: 1, power line core; 11, center conductor; 111, bare copper conductor; 112, conductor braided layer; 12, cooling tube; 2, control line core; 3, ground wire; 4, sheath layer; 5, cooling channel; 61, inner tube layer; 62, outer tube layer; 71, protrusion; 72, groove; 81, conductor; 82, insulation layer; 9, winding layer. DETAILED DESCRIPTION

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

[0020] Embodiment 1: A high-power charging cable, comprising: a cable core formed by twisting a plurality of power cores 1, a plurality of control cores 2 and a ground wire 3, and a sheath layer 4 wrapped around the outside of the cable core, a cooling tube 12 is sleeved on the outside of the central conductor 11 of the power core 1, so that a cooling channel 5 for passing a cooling medium is formed between the inner wall of the cooling tube 12 and the outer surface of the central conductor 11, the cooling tube 12 further comprises: an inner tube layer 61 whose inner wall contacts the cooling medium and an outer tube layer 62 tightly arranged on the outside of the inner tube layer 61, the outer surface of the inner tube layer 61 and the inner wall of the outer tube layer 62 are connected by a plurality of mutually embedded protrusions 71 and grooves 72.

[0021] The cooling tube 12 of the power core 1 is coaxially arranged with the central conductor 11;

[0022] The protrusions 71 are arranged at intervals along the circumferential direction on the outer surface of the inner tube layer 61 and the inner wall of the outer tube layer 62;

[0023] The plurality of protrusions 71 are spirally distributed on the outer surface of the inner tube layer 61, and the inner wall of the outer tube layer 62 is provided with a plurality of grooves 72 corresponding to the protrusions 71;

[0024] The inner tube layer 61 is a PTFE inner tube layer, and the outer tube layer 62 is a TPU outer tube layer;

[0025] The above-mentioned sheath layer 4 is a TPU sheath layer;

[0026] 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 .

[0027] Embodiment 2: A high-power charging cable, comprising: a cable core formed by twisting a plurality of power cores 1, a plurality of control cores 2 and a ground wire 3, and a sheath layer 4 wrapped around the outside of the cable core, a cooling tube 12 is sleeved on the outside of the central conductor 11 of the power core 1, so that a cooling channel 5 for passing a cooling medium is formed between the inner wall of the cooling tube 12 and the outer surface of the central conductor 11, the cooling tube 12 further comprises: an inner tube layer 61 whose inner wall contacts the cooling medium and an outer tube layer 62 tightly arranged on the outside of the inner tube layer 61, the outer surface of the inner tube layer 61 and the inner wall of the outer tube layer 62 are connected by a plurality of mutually embedded protrusions 71 and grooves 72.

[0028] The protrusions 71 are arranged on the outer surface of the inner tube layer 61 at intervals along the circumferential direction;

[0029] The four power line cores 1 are arranged in sequence along the circumferential direction in the sheath layer 4, and the cooling tubes 12 of adjacent power line cores 1 are pressed against each other;

[0030] A wrapping layer 9 is provided between the sheath layer 4 and the cable core. The wrapping layer 9 is formed by tightly wrapping a non-woven fabric tape or an aluminum alloy tape around the outer side of the cable core.

[0031] The above-mentioned sheath layer 4 is a TPE sheath layer;

[0032] The control wire core 2 and the ground wire 3 both include a conductor 81 and an insulating layer 82 disposed outside the conductor 81;

[0033] The control line core 2 may be a CAN communication signal transmission line pair, or a line pair for transmitting other control signals such as temperature measurement and electronic locks;

[0034] The ground wire 3 is set as a yellow-green two-color wire, which mainly plays the role of current-carrying phase balance and guides the generated unbalanced current. The two wires set on its outside are auxiliary power lines to ensure the switch of the electronic lock in case of fault so as to remove the charging gun.

[0035] By adopting the above-mentioned high-power charging cable, the structural strength and stability of the cooling pipe are improved through double-layer composite, and the bonding force between the inner and outer layers of the cooling pipe is improved, thereby ensuring the stability of the medium flow in the cooling channel during long-term use, and ensuring the balance and stability of the heat dissipation effect of the central conductor; in addition, the stability of the cooling pipe structure under complex working conditions such as long-term bending and twisting can be further improved, avoiding the interference of the inner and outer layers of the cooling pipe on the cooling medium in the cooling channel due to the separation, and improving the uniformity and stability of heat dissipation.

[0036] The above embodiments are only for illustrating the technical concept and features of the utility model, and their purpose is to enable people familiar with the technology to understand the content of the utility model and implement it accordingly, and they cannot be used to limit the protection scope of the utility model. Any equivalent changes or modifications made according to the spirit of the utility model should be included in the protection scope of the utility model.

Claims

1. A high-power charging cable, comprising: A cable core formed by twisting a plurality of power cores (1), a plurality of control cores (2) and a ground wire (3) and a sheath layer (4) coated on the outside of the cable core, characterized in that: a cooling tube (12) is sleeved on the outside of the central conductor (11) of the power core, so that a cooling channel (5) for passing a cooling medium is formed between the inner wall of the cooling tube (12) and the outer surface of the central conductor (11), and the cooling tube (12) further comprises: an inner tube layer (61) whose inner wall contacts the cooling medium and an outer tube layer (62) tightly arranged on the outside of the inner tube layer (61), and the outer surface of the inner tube layer (61) and the inner wall of the outer tube layer (62) are connected by a plurality of mutually embedded protrusions (71) and grooves (72).

2. The high-power charging cable according to claim 1, characterized in that: The cooling tube (12) of the power line core (1) is coaxially arranged with the central conductor (11).

3. The high-power charging cable according to claim 1, characterized in that: The protrusions (71) are arranged at intervals along the circumferential direction on the outer surface of the inner tube layer (61) and / or the inner wall of the outer tube layer (62).

4. The high-power charging cable according to claim 1, characterized in that: A plurality of protrusions (71) are distributed in a spiral shape on the outer surface of the inner tube layer (61), and a plurality of grooves (72) corresponding to the protrusions (71) are provided on the inner wall of the outer tube layer (62).

5. The high-power charging cable according to claim 1, characterized in that: The four power line cores (1) are arranged in sequence along the circumferential direction in the sheath layer (4), and the cooling pipes (12) of adjacent power line cores (1) are in contact with each other in a pressing manner.

6. The high-power charging cable according to claim 1, characterized in that: A wrapping layer (9) is provided between the sheath layer (4) and the cable core, and the wrapping layer (9) is formed by tightly wrapping a non-woven fabric tape or an aluminum alloy tape around the outer side of the cable core.

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