A high-power charging cable

Abstract

The utility model provides a high-power charging cable, which is applied in the field of charging cables. The main points of its technical solution are: it includes an outer sheath, and also includes: a signal line and a power line built into the outer sheath; the power line includes: a protective sheath; a conductor layer built into the protective sheath and formed by a plurality of transmission conductors with Z-shaped or S-shaped cross sections, the conductor layers enclose a heat dissipation channel for the circulation of cooling liquid; the cooling liquid flows through the heat dissipation channel formed between the plurality of transmission conductors, the transmission conductors generate heat during power transmission, and directly exchange heat with the cooling liquid after the heat is generated. In this solution, the heat source is in direct contact with the cooling liquid, so that the heat exchange is more direct and rapid, thereby improving the heat dissipation capacity of the cable; the technical effect is that the heat dissipation efficiency can be improved.

Description

Technical Field

[0001] The utility model relates to the field of charging cables, in particular to a high-power charging cable. Background Art

[0002] Charging cables are extremely common in daily life. They are cables used for power transmission. With the booming electric vehicle market, cables used for charging electric vehicles have also had a broader market. The part of the cable used for power transmission is called the power line, which is the main source of heat for the cable. The power line of the charging cable used for electric vehicles is characterized by high power and strong heat generation, and certain requirements are placed on the heat dissipation capacity of the cable.

[0003] The Chinese invention patent application with publication number CN117954161A discloses a liquid cooling cable and a matching connector and a liquid cooling cable integrated structure, including a liquid cooling tube and a cable surrounding the outer periphery of the liquid cooling tube, and a tightening structure for tightening the cable and the liquid cooling tube.

[0004] A liquid-cooled heat dissipation cable and a matching connector and a liquid-cooled heat dissipation cable integrated structure previously applied for disclose a solution for improving the heat dissipation effect of the cable by using a liquid cooling tube integrated with the cable to exchange heat with a heat source, thereby enhancing heat dissipation. This form of heat dissipation has low heat exchange efficiency and poor heat dissipation effect because the coolant in the liquid cooling tube cannot directly contact the core of the power line, that is, the heat source. Utility Model Content

[0005] The utility model aims to provide a high-power charging cable, which has the advantage of being able to improve heat dissipation efficiency.

[0006] In order to achieve the above-mentioned purpose and other related purposes, the utility model provides the following technical solutions: a high-power charging cable, including an outer sheath, and also including:

[0007] A signal line and a power line built into the outer sheath;

[0008] The power line includes: a protective cover; a conductor layer built into the protective cover and formed by a plurality of transmission conductors with Z-shaped or S-shaped cross sections, the conductor layer enclosing a heat dissipation channel for the circulation of cooling liquid.

[0009] Through the above technical solution, the coolant flows through the heat dissipation channel formed by several transmission conductors. The transmission conductors generate heat during power transmission and directly exchange heat with the coolant after heating. This solution makes the heat exchange more direct and rapid through direct contact between the heat source and the coolant, thereby improving the heat dissipation efficiency of the cable.

[0010] In one embodiment of the present invention, two adjacent power transmission conductors with Z-shaped or S-shaped cross sections are interlocked and closed.

[0011] Through the above technical solution, the transmission conductors support each other and enhance the strength of the power line.

[0012] In an embodiment of the present invention, a non-corrosive coolant flows in the heat dissipation channel and is in direct contact with the conductor layer.

[0013] In an embodiment of the present invention, the coolant is configured as silicone oil or thermal oil.

[0014] Through the above technical solution, the coolant is brought into direct contact with the power transmission conductor, thereby improving the heat exchange efficiency.

[0015] In an embodiment of the present invention, a heat-conducting layer is filled between the outer sheath and the power line.

[0016] In an embodiment of the present invention, the heat-conducting layer is configured as heat-conducting silica gel or silver glue.

[0017] Through the above technical solution, the provision of the heat-conducting layer accelerates the heat transfer speed of the transmission conductor and improves the heat dissipation efficiency; at the same time, it can support the cable and make the surface of the cable flat and smooth.

[0018] In one embodiment of the present invention, the signal line includes a wire core and an isolation sleeve covering the wire core, and the wire core is composed of a zinc alloy copper wire and a bare copper wire surrounding the zinc alloy copper wire.

[0019] Through the above technical solution, the zinc alloy copper wire has good strength and strong tensile resistance, which can improve the tensile resistance of signal lines and cables; the bare copper wire is softer and can improve the flatness of the signal and make the surface of the signal line smooth.

[0020] As described above, the high-power charging cable of the utility model has the following beneficial effects:

[0021] The coolant flows through the heat dissipation channel formed between several transmission conductors. When power is transmitted, the transmission conductors generate heat and directly exchange heat with the coolant after heating. This solution makes the heat exchange more direct and rapid through direct contact between the heat source and the coolant, thereby improving the heat dissipation efficiency of the cable. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 Shown is a schematic diagram of the structure of a high-power charging cable disclosed in an embodiment of the present utility model.

[0023] Figure 2 Shown is a schematic diagram of the power line of the high-power charging cable disclosed in an embodiment of the present utility model.

[0024] Figure 3Shown is a schematic diagram of the signal lines of the high-power charging cable disclosed in an embodiment of the present utility model.

[0025] Description of technical feature numbers in the accompanying drawings:

[0026] 1. Outer sheath; 2. Power line; 3. Protective sheath; 4. Conductor layer; 5. Power transmission conductor; 6. Heat dissipation channel; 7. Inner layer; 8. Outer layer; 9. Thermal conductive layer; 10. Signal line; 11. Isolation sheath; 12. Zinc alloy copper wire; 13. Bare copper wire; 14. Ground wire. DETAILED DESCRIPTION

[0027] The following specific embodiments illustrate the implementation of the present invention, and those familiar with the technology can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. It should be noted that the following embodiments and features in the embodiments can be combined with each other without conflict.

[0028] See also Figure 1 The utility model provides a high-power charging cable, comprising:

[0029] The outer sheath 1 is made of cross-linked polyolefin, TPE or TPU, and has a circular cross section. The power line 2, the signal line 10 and the ground line 14 are arranged in the outer sheath 1.

[0030] See also Figure 1 and Figure 2 The power line 2 includes a protective sleeve 3 and a conductor layer 4 built into the protective sleeve 3. The material of the protective sleeve 3 is set to be cross-linked polyolefin. The conductor layer 4 is formed by a plurality of transmission conductors 5 in close contact and has a ring-shaped cross section. The transmission conductor 5 includes an inner layer portion 7 and an outer layer portion 8 fixed to the inner layer portion 7. The inner layer portion 7 and the outer layer portion 8 are staggered so that the cross section of the transmission conductor 5 is Z-shaped or S-shaped. The plurality of inner layer portions 7 are set against each other in pairs to limit the transmission conductor 5 from moving in the circumferential direction of the conductor layer 4. The plurality of outer layer portions 8 are also set against each other in pairs so that the transmission conductors adjacent to each other are embedded and closed, thereby enhancing stability and making the surface of the conductor layer 4 flat; the inner layer portions 7 and the outer layer portions 8 of two adjacent transmission conductors 5 are in contact with each other and are distributed along the axial direction of the conductor layer 4. The inner layer portions 7 and the outer layer portions 8 of the plurality of transmission conductors 5 mutually limit the position of the transmission conductor 5 along the axial direction of the conductor layer 4, thereby forming a mutually supporting stable structure between the plurality of transmission conductors 5.

[0031] The conductor layer 4 encloses and forms a heat dissipation channel 6 for the circulation of coolant. The coolant is a non-corrosive coolant. In this embodiment, the coolant is set to be thermal oil. In other embodiments, silicone oil can also be used instead. There is no intermediate medium between the heat source and the coolant. The thermal oil and silicone oil can quickly exchange heat with the power transmission conductor 5, thereby enhancing the heat dissipation efficiency, and can prevent the power transmission conductor 5 from corrosion.

[0032] See also Figure 1 and Figure 3 , and also includes a signal line 10 built into the outer sheath 1, the signal line 10 includes a wire core and an isolation sleeve 11 coated on the wire core, the wire core is composed of a zinc alloy copper wire 12 and a bare copper wire 13 surrounding the zinc alloy copper wire 12, wherein the zinc content of the zinc alloy copper wire 12 is set to 0.5-0.9%, and has strong tensile strength, thereby enhancing the strength of the signal line 10; the bare copper wire 13 is soft in texture, and can make the surface of the signal line 10 round after twisting.

[0033] See also Figure 1 , and also includes a heat-conducting layer 9 filling the gap between the outer sheath 1 and the signal line 10, the ground line 14, and the power line 2. The signal line 10, the ground line 14, and the power line 2 are compactly distributed in pairs, and the outer sheath 1 is covered outside the signal line 10, the ground line 14, and the power line 2, so as to reduce the outer diameter of the line body as much as possible. At the same time, the heat-conducting layer 9 only fills the gap and does not affect the outer diameter of the line body, so that the outer diameter is in a minimum state. In this embodiment, the heat-conducting layer 9 is set to be heat-conducting silica gel, and silver glue can also be used instead in other embodiments. On the one hand, the heat-conducting layer 9 supports the line body after filling, making the surface of the line body rounded. On the other hand, the heat-conducting silica gel can quickly transfer the heat generated in the power line 2, thereby achieving a rapid heat dissipation effect.

[0034] The utility model has a cooling liquid flowing through a heat dissipation channel 6 formed between a plurality of power transmission conductors 5. The power transmission conductors 5 generate heat during power transmission, and directly exchange heat with the cooling liquid after the heat is generated. This solution enables direct and rapid heat exchange by direct contact between the heat source and the cooling liquid. At the same time, the setting of the heat conductive layer accelerates heat transfer, thereby improving the heat dissipation efficiency of the cable.

[0035] The power line with a Z-shaped or S-shaped cross section and the adjacent embedded power transmission conductors improve the stability of the conductor layer and also increase the volume of the heat dissipation fluid. Combined with the core structure of the signal line, the overall tensile strength of the utility model is improved.

[0036] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. All equivalent modifications or changes made by those skilled in the art without departing from the spirit and technical ideas disclosed in the present invention shall still be covered by the claims of the present invention.

Claims

1. A high-power charging cable, comprising an outer sheath (1), characterized in that: Also includes: A signal line (10) and a power line (2) built into the outer sheath (1); The power line (2) comprises: a protective sleeve (3); a conductor layer (4) built into the protective sleeve (3) and formed by a plurality of power transmission conductors (5) having Z-shaped or S-shaped cross sections, the conductor layer (4) enclosing a heat dissipation channel (6) for the circulation of a cooling liquid.

2. The high-power charging cable according to claim 1, characterized in that: Two adjacent power transmission conductors (5) with Z-shaped or S-shaped cross sections are mutually embedded and closed.

3. The high-power charging cable according to claim 1, characterized in that: Non-corrosive cooling liquid flows in the heat dissipation channel (6) and is in direct contact with the conductor layer (4).

4. The high-power charging cable according to claim 3, characterized in that: The coolant is configured as silicone oil or heat transfer oil.

5. The high-power charging cable according to claim 1, characterized in that: A heat-conducting layer (9) is filled between the outer sheath (1) and the power line (2).

6. The high-power charging cable according to claim 5, characterized in that: The heat-conducting layer (9) is configured as heat-conducting silica gel or silver glue.

7. The high-power charging cable according to claim 1, characterized in that: The signal line (10) comprises a line core and an isolation sleeve (11) covering the line core, wherein the line core is composed of a zinc alloy copper wire (12) and a bare copper wire (13) surrounding the zinc alloy copper wire (12).

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