High-efficiency heat dissipation semi-annular arrangement structure liquid-cooled charging pile cable

Abstract

This utility model relates to the field of cable technology and discloses a high-efficiency heat dissipation semi-circular arrangement structure liquid-cooled charging pile cable, including a liquid-cooling tube. Multiple negative terminals of the main conductors are arranged on the outer wall of the upper liquid-cooling tube, and multiple positive terminals of the main conductors are arranged on the outer wall of the lower liquid-cooling tube. A control signal conductor is arranged on the outer wall of the positive terminal of the main conductor on the right side. A grounding conductor is arranged on the left side of the outer wall of the control signal conductor, and an auxiliary power conductor is arranged on the top of the outer wall of the control signal conductor. The surface of the liquid-cooling tube of this utility model is coated with a nano-thermal conductive coating and symmetrically fixed on both sides of the liquid-cooling tube in a semi-circular array. The auxiliary power conductor, grounding conductor, and control signal conductor are placed in the gaps around the liquid-cooling tube. Therefore, by combining the semi-circular conductor array with the liquid-cooling tube, both heat dissipation efficiency and flexibility are improved, meeting the needs of daily use.

Description

Technical Field

[0001] This utility model relates to the field of cable technology, and in particular to a liquid-cooled charging pile cable with a high-efficiency heat dissipation semi-circular arrangement structure. Background Technology

[0002] In the field of high-voltage charging equipment technology for new energy vehicles, specifically, a high-power liquid-cooled charging pile cable adapted to 800V / 1000V ultra-fast charging platforms, based on the coupling and heat dissipation of a semi-ring conductor array and liquid-cooled pipe, is suitable for high-frequency bending and high-current heat dissipation scenarios such as vehicle-mounted mobile charging guns and fixed charging piles, especially meeting the requirements of next-generation 500kW and above ultra-fast charging technology for lightweight and high reliability of cables, according to a search.

[0003] Traditional charging pile cables face the following technical bottlenecks during fast charging: Insufficient heat dissipation efficiency: Existing liquid-cooled cables mostly use a single liquid-cooling tube arranged in parallel with the positive and negative electrode cores. The contact area between the core and the liquid-cooling tube is small, and the heat conduction path is long, resulting in excessively high cable temperature rise. Traditional cables have a surface temperature rise of ≥60K at 500A current, which limits the increase in charging power and poses safety hazards. Flexibility and lightweight defects: Traditional single large-section conductors, such as 120mm², have poor flexibility and a large bending radius, usually ≥10D, making it difficult to adapt to the frequent dragging and bending of charging piles. In addition, the cables are heavy, increasing installation and maintenance costs. Room for structural design optimization: The existing core layout does not fully utilize the heat dissipation capacity of the liquid-cooling tube, resulting in insufficient heat dissipation surface area and a lack of coordinated optimization of conductor arrangement and heat exchange efficiency. Utility Model Content

[0004] To overcome the above shortcomings, this utility model provides a high-efficiency heat dissipation semi-circular arrangement structure liquid-cooled charging pile cable, which aims to improve the existing liquid-cooled charging pile cables with low heat dissipation efficiency and no support for high voltage and high current, as well as the problems of excessive temperature rise and insufficient flexibility of traditional cables.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A high-efficiency heat dissipation semi-circular arrangement structure liquid-cooled charging pile cable includes a liquid-cooled tube. The outer wall of the upper liquid-cooled tube is provided with multiple main conductor negative terminals, and the outer wall of the lower liquid-cooled tube is provided with multiple main conductor positive terminals. The outer wall of the right main conductor positive terminal is provided with a control signal conductor. The left side of the outer wall of the control signal conductor is provided with a grounding conductor. The top of the outer wall of the control signal conductor is provided with an auxiliary power conductor. The top left side of the outer wall of the left main conductor positive terminal is provided with an anti-interference communication conductor.

[0007] As a further description of the above technical solution:

[0008] The outer wall of the liquid cooling tube is provided with an outer sheath, and the left and right ends of the liquid cooling tube are in contact with the outer wall of the corresponding control signal core.

[0009] As a further description of the above technical solution:

[0010] The inner upper and lower sides of the liquid cooling tube are in contact with the corresponding negative and positive electrodes of the main conductor.

[0011] As a further description of the above technical solution:

[0012] The positive electrode of the main core is composed of multiple small-section conductors arranged in a semi-circular array around the liquid cooling tube.

[0013] As a further description of the above technical solution:

[0014] The liquid cooling tube is a smooth, round XLPO tube with a nano-thermal conductive coating on its outer wall.

[0015] As a further description of the above technical solution:

[0016] The outer sheath is made of low-smoke, halogen-free, flame-retardant polyurethane with an oxygen index ≥32%.

[0017] As a further description of the above technical solution:

[0018] The auxiliary power supply core is made of multi-strand stranded copper wire, and the insulation layer is TPE thermoplastic elastomer, used for low-voltage power supply.

[0019] This utility model has the following beneficial effects:

[0020] The surface of the extruded liquid cooling pipe is coated with a nano-thermal conductive coating. The coolant is an ethylene glycol aqueous solution. The main conductor is processed, stranded, and then extruded with a silicone rubber insulation layer. It is symmetrically fixed on both sides of the liquid cooling pipe in a semi-circular array. The auxiliary power conductor, grounding conductor, and control signal conductor are placed in the gaps around the liquid cooling pipe. Then, the whole thing is wrapped with an aluminum-plastic composite tape and an outer halogen-free flame-retardant polyester tape. Through multiple cycle tests, the conductor did not break. The insulation conductor was subjected to a withstand voltage test. Therefore, by combining the semi-circular conductor array with the liquid cooling pipe, the heat dissipation efficiency and flexibility are improved, meeting the needs of daily use. Attached Figure Description

[0021] Figure 1 This is a front view of a high-efficiency heat dissipation semi-circular arrangement structure liquid-cooled charging pile cable according to the present invention;

[0022] Figure 2 This is a side view of a high-efficiency heat dissipation semi-circular arrangement structure liquid-cooled charging pile cable according to the present invention.

[0023] Figure 3This is a top view of a high-efficiency heat dissipation semi-circular arrangement structure liquid-cooled charging pile cable according to the present invention.

[0024] Figure 4 This is a structural diagram illustrating a high-efficiency heat dissipation semi-circular arrangement structure liquid-cooled charging pile cable according to this utility model.

[0025] Legend:

[0026] 1. Liquid cooling pipe; 2. Main conductor negative terminal; 3. Auxiliary power supply conductor; 4. Grounding conductor; 5. Control signal conductor; 6. Main conductor positive terminal; 7. Anti-interference communication conductor; 8. Outer sheath. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0028] Please see the appendix Figure 1 - Appendix Figure 3 This utility model provides an embodiment of a high-efficiency heat dissipation semi-circular arrangement structure liquid-cooled charging pile cable, including a liquid-cooled pipe 1. The outer wall of the upper liquid-cooled pipe 1 is provided with multiple main core negative electrodes 2, and the outer wall of the lower liquid-cooled pipe 1 is provided with multiple main core positive electrodes 6. The outer wall of the right main core positive electrode 6 is provided with a control signal wire core 5, the left side of the outer wall of the control signal wire core 5 is provided with a grounding wire core 4, the top of the outer wall of the control signal wire core 5 is provided with an auxiliary power supply wire core 3, and the top left side of the outer wall of the left main core positive electrode 6 is provided with an anti-interference communication wire core 7. The upper and lower sides of the interior of the liquid-cooled pipe 1 are in contact with the corresponding main core negative electrodes 2 and main core positive electrodes 6.

[0029] Specifically, the liquid cooling pipe 1 is made of XLPO cross-linked polyolefin, with a smooth and corrosion-resistant inner wall. Surface treatment: coated with a nano-thermal conductive coating with a thermal conductivity ≥5W / m・K to improve heat transfer efficiency; specifications: inner diameter 8mm, wall thickness 1.2mm, temperature range -40℃~125℃, internal flow rate of 50% ethylene glycol aqueous solution ≥2L / min; main core positive electrode 6 conductor: the traditional single large cross-section conductor is split into 6~8 soft-structure annealed copper or tin-plated copper conductors conforming to GB / T3956-2008, with a single cross-sectional area of ​​1 / 3 of the original conductor. / 5~1 / 8 example: The original 120mm² is split into 6 20mm² wires; Arrangement: With liquid cooling tube 1 as the center, the positive and negative conductors are symmetrically distributed on both sides of liquid cooling tube 1 in a semi-circular array with a central angle of 100~140°. The small insulated wire cores are in close contact to maximize the contact area between the wire core and liquid cooling tube 1; Insulation layer: XLPO material, long-term temperature resistance 150℃, dielectric strength ≥30kV / mm, thickness 1.5mm, auxiliary power core 3, multi-strand stranded copper wire, insulation layer is TPE thermoplastic elastomer, used for low voltage power supply.

[0030] Please see the appendix Figure 2 - Appendix Figure 4 The main core positive electrode 6 is composed of multiple small cross-section conductors arranged in a semi-circular array around the liquid cooling tube 1. The outer wall of the liquid cooling tube 1 is provided with an outer sheath 8. The inner left and right ends of the liquid cooling tube 1 are in contact with the outer wall of the corresponding control signal core 5. The liquid cooling tube 1 is a smooth and round XLPO tube with a nano thermally conductive coating on the outer wall. The outer sheath 8 is made of low-smoke halogen-free flame-retardant polyurethane with an oxygen index ≥32%. The auxiliary power core 3 uses multi-strand stranded copper wire with a TPE thermoplastic elastomer insulation layer for low-voltage power supply.

[0031] Specifically, control signal core 5: twisted pair shielded structure, conductor is tinned copper wire, shielding layer is aluminum foil plus braided copper mesh, anti-electromagnetic interference, anti-interference communication core 7: independent shielded structure, used for high frequency data transmission, separate from control signal core 5 to avoid signal crosstalk, outer sheath 8, material: low smoke halogen-free flame retardant polyurethane TPU, oxygen index ≥32%, Shore hardness 75A, thickness 2.0mm; performance: excellent weather resistance, bending radius ≤6DD (cable outer diameter), suitable for high frequency bending scenarios, core innovation: 2 is split into multiple small conductors, symmetrically surrounding liquid cooling pipe 1 in a semi-circular array, with close contact between the small cores, enhancing the heat exchange efficiency between coolant 1 and conductor, the outer wall of liquid cooling pipe 1 is designed to be smooth and round.

[0032] Working principle: The liquid-cooled tube 1 is formed by extrusion molding, with an inner diameter of 8mm, a wall thickness of 1.2mm, and a surface coated with a nano-thermal conductive coating with a thermal conductivity ≥5W / m·K. The coolant is a 50% ethylene glycol aqueous solution with a flow rate ≥2L / min. The main core is processed by splitting the original 120mm² copper conductor into six 20mm² soft copper wires, which are then stranded and extruded with a 1.5mm thick silicone rubber insulation layer. These are symmetrically fixed on both sides of the liquid-cooled tube 1 in a semi-circular array with a central angle of 120° and a spacing of 1.5mm. Cabling and shielding: The auxiliary power core 3, grounding core 4, and control signal core 5 are placed in the gaps around the liquid-cooled tube 1. Then, the entire cable is wrapped with an aluminum-plastic composite shielding layer, followed by an outer wrap of halogen-free flame-retardant polyester tape, and finally an outer sheath extruded. This utilizes low-smoke halogen-free flame-retardant polyurethane with an oxygen index ≥32%, Shore hardness 75A, and a thickness of 2.0mm. Temperature rise testing: under a continuous current of 500A, the cable surface temperature rise is ≤35K, compared to ≥60K for traditional cables. Furthermore, considering insulation performance, it withstands a power frequency withstand voltage of 5kV / 5min without breakdown. In a swing test: through multiple cycles, the conductor shows no breakage. A withstand voltage test on the insulated core shows no insulation breakdown. Therefore, by combining a semi-circular conductor array with liquid cooling pipe 1, a dual improvement in heat dissipation efficiency and flexibility is achieved, meeting daily usage requirements.

[0033] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A high-efficiency heat dissipation semi-circular arrangement structure liquid-cooled charging pile cable, comprising a liquid-cooling pipe (1), characterized in that: The outer wall of the upper liquid cooling pipe (1) is provided with multiple main wire core negative poles (2), the outer wall of the lower liquid cooling pipe (1) is provided with multiple main wire core positive poles (6), the outer wall of the right main wire core positive pole (6) is provided with a control signal wire core (5), the left side of the outer wall of the control signal wire core (5) is provided with a grounding wire core (4), the top of the outer wall of the control signal wire core (5) is provided with an auxiliary power supply wire core (3), and the top of the left side of the outer wall of the left main wire core positive pole (6) is provided with an anti-interference communication wire core (7).

2. The high-efficiency heat dissipation semi-circular arrangement structure liquid-cooled charging pile cable according to claim 1, characterized in that: The outer wall of the liquid cooling pipe (1) is provided with an outer sheath (8), and the inner left and right ends of the liquid cooling pipe (1) are in contact with the outer wall of the corresponding control signal core (5).

3. The high-efficiency heat dissipation semi-circular arrangement structure liquid-cooled charging pile cable according to claim 1, characterized in that: The upper and lower sides of the inside of the liquid cooling tube (1) are in contact with the corresponding negative electrode (2) and positive electrode (6) of the main core.

4. The high-efficiency heat dissipation semi-circular arrangement structure liquid-cooled charging pile cable according to claim 1, characterized in that: The main core positive electrode (6) is composed of multiple small cross-section conductors arranged in a semi-circular array around the liquid cooling tube (1).

5. The high-efficiency heat dissipation semi-circular arrangement structure liquid-cooled charging pile cable according to claim 1, characterized in that: The liquid cooling pipe (1) is a smooth, round XLPO pipe with a nano-thermal conductive coating on its outer wall.

6. The high-efficiency heat dissipation semi-circular arrangement structure liquid-cooled charging pile cable according to claim 2, characterized in that: The outer sheath (8) is made of low-smoke halogen-free flame-retardant polyurethane with an oxygen index ≥32%.

7. The high-efficiency heat dissipation semi-circular arrangement structure liquid-cooled charging pile cable according to claim 1, characterized in that: The auxiliary power supply core (3) is made of multi-strand stranded copper wire with TPE thermoplastic elastomer insulation layer, and is used for low-voltage power supply.

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