Charging cables for electric vehicles

Abstract

The utility model discloses a charging cable for electric vehicles, comprising: a cable core formed by twisting a plurality of power cores, a plurality of control core groups and a ground wire, and a sheath layer coated on 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, a plastic film belt is wrapped around the outside of the control core group formed by twisting at least two control cores, a metal braiding layer and a wrapping layer are sequentially arranged on the outside of the plastic film belt, and an aluminum foil layer is arranged on the surface of the plastic film belt facing the metal braiding layer. The utility model can effectively shield the interference of the power transmission process on the signal transmission inside the cable, improve the stability of signal transmission and power transmission, and the safety of charging electricity.

Description

Technical Field

[0001] The utility model relates to a charging cable for an electric vehicle, 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] The load current value of the cable used for charging piles is large, and the conductor is easy to heat up. When in use, especially when used at high frequency, the heat and electromagnetic interference generated are large, especially interference with the signal transmission inside the cable. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a charging cable for an electric vehicle, which can effectively shield the interference of the electric energy transmission process on the signal transmission inside the cable, improve the stability of signal transmission and electric energy transmission and the safety of charging electricity.

[0005] In order to solve the above technical problems, the technical solution adopted by the utility model is: a charging cable for an electric vehicle, comprising: a cable core formed by twisting a plurality of power cores, a plurality of control core groups and a ground wire, and a sheath layer coated on 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, a plastic film belt is wrapped around the outside of the control core group formed by twisting at least two control cores, a metal braided layer and a wrapped layer are sequentially arranged on the outside of the plastic film belt, and an aluminum foil layer is arranged on the surface of the plastic film belt facing the metal braided layer.

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

[0007] 1. In the above scheme, the aluminum foil layer on the surface of the plastic film strip is formed by sputtering.

[0008] 2. In the above solution, the metal braided layer is obtained by braiding bare copper wires.

[0009] 3. In the above solution, the wrapping layer is formed by wrapping a non-woven fabric tape or an aluminum alloy tape around the outer side of the metal braided layer.

[0010] 4. In the above solution, a filling wire is provided in the gap between the power line core, the control line core group and the ground wire, and the filling wire is in pressure contact with the adjacent power line core, the control line core group or the ground wire.

[0011] 5. In the above solution, the filling thread is cotton thread or heat-resistant fiber thread.

[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 provides a charging cable for an electric vehicle, wherein a cooling tube is sleeved at intervals on the outer side of a central conductor of a 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, a plastic film belt is wrapped around the outer side of a control core group formed by twisting at least two control cores, a metal braiding layer and a wrapping layer are sequentially arranged on the outer side of the plastic film belt, and an aluminum foil layer is arranged on the surface of the plastic film belt facing the metal braiding layer. While realizing stable transmission of high-power electric energy and effective heat dissipation, the interference of the electric energy transmission process on the signal transmission inside the cable can be effectively shielded, the stability of signal transmission and electric energy transmission and the safety of charging electricity can be improved, and the wear resistance, bending resistance and twisting resistance of the cable as a whole can be improved, thereby extending the service life of the cable. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Attached Figure 1 This is a schematic diagram of the structure of the charging cable for an electric vehicle of the utility model;

[0015] Attached Figure 2 It is a schematic diagram of the structure enlargement of the control wire core group in the charging cable of the electric vehicle of the utility model;

[0016] Attached Figure 3 The utility model is a schematic diagram of a local structure of a charging cable for an electric vehicle.

[0017] 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 group; 21, control line core; 3, ground wire; 4, sheath layer; 5, cooling channel; 6, plastic film belt; 7, metal braided layer; 8, wrapping layer; 9, aluminum foil layer; 10, filling wire. DETAILED DESCRIPTION

[0018] The present invention can be further understood through the specific embodiments given below, but they are not intended to limit the present invention.

[0019] Embodiment 1: A charging cable for an electric vehicle, comprising: a cable core formed by twisting a plurality of power cores 1, a plurality of control core groups 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, a plastic film tape 6 is wrapped around the outside of the control core group 2 formed by twisting at least two control cores 21, a metal braided layer 7 and a wrapping layer 8 are sequentially arranged on the outside of the plastic film tape 6, and an aluminum foil layer 9 is arranged on the surface of the plastic film tape 6 facing the metal braided layer 7.

[0020] The aluminum foil layer 9 on the surface of the plastic film strip 6 is formed by sputtering, which is high frequency anti-interference and improves the stability of the signal characteristic impedance;

[0021] The metal braided layer 7 is braided from bare copper wires and is low-frequency resistant to EMC electromagnetic interference;

[0022] The wrapping layer 8 is formed by wrapping a non-woven fabric tape around the outside of the metal braided layer 7, which reduces the surface friction of the cable core, improves the twisting and pulling of the internal control wire when the cable is bent, and increases the number of bends;

[0023] A filling wire 10 is arranged in the gap between the power line core 1, the control line core group 2 and the ground line 3, and the filling wire 10 is in pressure contact with the adjacent power line core 1, the control line core group 2 or the ground line 3;

[0024] The filling wire 10 is a cotton wire, which makes the structure of the cable more compact, protects the internal control wire when twisting and bending, and prevents the control wire from being squeezed and stretched to cause the conductor to break. At the same time, the filling wire has a certain heat insulation performance, which reduces the transmission of heat from the cooling unit to the cable surface, reduces the temperature of the cable surface, and prevents burns to personnel during operation.

[0025] The cooling tube 12 of the power core 1 is coaxially arranged with the central conductor 11;

[0026] The above-mentioned sheath layer 4 is a TPU sheath layer;

[0027] The central conductor 11 of the power core 1 comprises a compacted bare copper conductor 111 and a conductor braided layer 112 wrapped around the bare copper conductor 111. Compressing can reduce the size of the stranded conductor, thereby further reducing the diameter of the finished product.

[0028] The conductor adopts a twisted structure, which is easy to loosen when bent and twisted, causing the gap between the conductor and the cooling tube to become smaller and the liquid flow resistance to increase. An additional braided structure is used to restrain the twisted conductor to ensure the stability of the conductor size when bent and the stability of the flow resistance. At the same time, the braided structure can reduce the probability of single wire breakage of the conductor during use and prevent broken copper wires from piercing the cooling tube.

[0029] Embodiment 2: A charging cable for an electric vehicle, comprising: a cable core formed by twisting a plurality of power cores 1, a plurality of control core groups 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, a plastic film tape 6 is wrapped around the outside of the control core group 2 formed by twisting at least two control cores 21, a metal braided layer 7 and a wrapping layer 8 are sequentially arranged on the outside of the plastic film tape 6, and an aluminum foil layer 9 is arranged on the surface of the plastic film tape 6 facing the metal braided layer 7.

[0030] The wrapping layer 8 is formed by wrapping an aluminum alloy strip around the outer side of the metal braiding layer 7;

[0031] A filling wire 10 is arranged in the gap between the power line core 1, the control line core group 2 and the ground line 3, and the filling wire 10 is in pressure contact with the adjacent power line core 1, the control line core group 2 or the ground line 3;

[0032] The filling line 10 is a heat-resistant fiber line;

[0033] 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;

[0034] A plurality of control core groups 2 and ground wires 3 are arranged at intervals along the inner wall of the sheath layer 4 and are located between two adjacent power cores 1 .

[0035] The above-mentioned charging cable for electric vehicles can achieve stable transmission of high-power electric energy and effective heat dissipation, while effectively shielding the interference of the electric energy transmission process on the signal transmission inside the cable, thereby improving the stability of signal transmission and electric energy transmission and the safety of charging electricity, and can also improve the overall wear resistance, bending resistance and twisting resistance of the cable, thereby extending the service life of the cable.

[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 charging cable for an electric vehicle, comprising: A cable core formed by twisting a plurality of power cores (1), a plurality of control core groups (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 provided at intervals 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); a plastic film tape (6) is wrapped around the outside of the control core group (2) formed by twisting at least two control cores (21); a metal braided layer (7) and a wrapping layer (8) are arranged in sequence on the outside of the plastic film tape (6); and an aluminum foil layer (9) is provided on the surface of the plastic film tape (6) facing the metal braided layer (7).

2. The charging cable for an electric vehicle according to claim 1, characterized in that: The aluminum foil layer (9) on the surface of the plastic film strip (6) is formed by sputtering.

3. The charging cable for an electric vehicle according to claim 1, characterized in that: The metal braided layer (7) is obtained by braiding bare copper wires.

4. The charging cable for an electric vehicle according to claim 1, characterized in that: The wrapping layer (8) is formed by wrapping a non-woven fabric tape or an aluminum alloy tape around the outside of the metal braided layer (7).

5. The charging cable for an electric vehicle according to claim 1, characterized in that: A filling wire (10) is provided in the gap between the power wire core (1), the control wire core group (2) and the ground wire (3), and the filling wire (10) is in pressing contact with the adjacent power wire core (1), the control wire core group (2) or the ground wire (3).

6. The charging cable for an electric vehicle according to claim 5, characterized in that: The filling thread (10) is a cotton thread or a temperature-resistant fiber thread.

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