Small-outer-diameter liquid cooling charging cable

Abstract

The utility model provides a small-outer-diameter liquid cooling charging cable, which comprises an outer sheath provided with an inner cavity, an auxiliary power line and a signal line group which are arranged in the inner cavity of the outer sheath, and a liquid inlet pipe arranged in the center of the inner cavity of the outer sheath, the 2n main power lines are arranged in the inner containing cavity of the outer sheath and symmetrically arranged on the periphery of the liquid inlet pipe, the connecting lines of the two end points of the outer arc surface of each main power line and the circle center of the pipe circle of the liquid inlet pipe form a sector, and the arc shape of the inner arc surface of each main power line is matched with the arc shape of the outer circumference of the liquid inlet pipe; the ground wire is the same as the main power wire in shape; the liquid outlet pipe is arranged in the inner containing cavity of the outer sheath, and the liquid outlet pipe and the liquid inlet pipe form a cooling liquid circulation channel; and the auxiliary power line and the signal line group are arranged in gaps among the liquid inlet pipe, the liquid outlet pipe, the main power line and the ground wire. The liquid-cooled charging cable has the advantages that the space of the inner cavity of the outer sheath is effectively utilized, and the outer diameter of the liquid-cooled charging cable is reduced; and meanwhile, a good cooling effect is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of new energy liquid-cooled charging cables, in particular to a small outer diameter liquid-cooled charging cable. Background Art

[0002] In order to ensure the driving range and quick charging, the new energy vehicle field requires large battery capacity and short charging time. At present, the main way to achieve fast charging of new energy vehicles is DC charging. DC high-power charging piles have the characteristics of low voltage and large current, but a large amount of heat will be generated during the charging process, which will cause the temperature of the charging pile cable (hereinafter referred to as the charging cable) to rise rapidly. Excessive temperature of the charging cable will cause insulation damage, reduced charging stability, and even burns to personnel. At present, the heat dissipation performance of the high-current fast-charging charging pile cable is mainly improved by setting a liquid cooling circulation pipeline inside the charging pile cable, and the heat is taken away by the circulation of the coolant to achieve the effect of cooling. However, the addition of a liquid cooling circulation pipeline also increases the outer diameter of the charging cable. For example, the outer diameter of the existing 300A DC fast-charging cable is generally above 40mm, which brings obstacles to the user's hand holding the charging cable, especially for small hands and female users. It brings many inconveniences. Utility Model Content

[0003] In view of the above-mentioned shortcomings of the prior art, the purpose of the present invention is to provide a small outer diameter liquid-cooled charging cable, which is used to solve the problem that the prior art uses a liquid-cooled cooling circulation pipeline to achieve the purpose of cooling, resulting in a large outer diameter of the charging cable, which makes it inconvenient to hold.

[0004] In order to achieve the above purpose and other related purposes, the utility model provides the following technical solutions:

[0005] A small outer diameter liquid-cooled charging cable, comprising an outer sheath with an inner cavity, an auxiliary power line and a signal line group arranged in the inner cavity of the outer sheath, and also comprising: a liquid inlet pipe, arranged in the center of the inner cavity of the outer sheath; 2n main power lines, arranged in the inner cavity of the outer sheath and symmetrically arranged on the outer circumference of the liquid inlet pipe, the lines connecting the two end points of the outer arc surface of each of the main power lines and the center of the tube circle of the liquid inlet pipe form a fan shape, and the arc shape of the inner arc surface of each of the main power lines and the arc shape of the outer circumference of the liquid inlet pipe are connected. The outer casing is provided with a ground wire, which is arranged in the inner cavity of the outer sheath and surrounds the outer circumference of the liquid inlet pipe. The two end points of the outer arc surface of the ground wire and the line connecting the center of the tube circle of the liquid inlet pipe form a fan shape. The arc shape of the inner arc surface of the ground wire is adapted to the arc shape of the outer circumference of the liquid inlet pipe. The liquid outlet pipe is arranged in the inner cavity of the outer sheath and forms a coolant circulation channel with the liquid inlet pipe. The auxiliary power line and the signal line group are arranged in the gap between the liquid inlet pipe, the liquid outlet pipe, the main power line and the ground wire.

[0006] To implement the above technical solution, the main power line and the ground wire are designed to have an inner arc shape that matches the outer circumferential arc shape of the liquid inlet pipe, and the arc shape of the outer arc surface is larger than the arc shape of the inner arc surface, which can effectively utilize the inner cavity space of the outer sheath, and the main power line and the ground wire are arranged around the outer circumference of the liquid inlet pipe. While the coolant circulates in the liquid inlet pipe, it takes away the heat generated by the main power line and the ground wire during the charging process, thereby achieving a cooling effect and ensuring the stability of charging.

[0007] As a preferred embodiment of the present invention, the main power line includes a power line center conductor which is densely compressed and arranged to form the inner arc surface and the outer arc surface of the main power line, and a power line insulation layer wrapped around the outer periphery of the power line center conductor.

[0008] As a preferred solution of the utility model, it is characterized in that the ground wire includes a ground wire center conductor which is densely pressed and arranged to form the inner arc surface and the outer arc surface of the ground wire, and a ground wire insulation layer wrapped around the outer periphery of the ground wire center conductor.

[0009] To implement the above technical solution, the center conductor of the power line and the center conductor of the ground line are densely compressed and arranged, so that the contact between the conductor single wires is closer, the resistance is smaller, and the current is larger, so that the charging current is larger and the charging efficiency is higher for conductors with the same cross-section.

[0010] As a preferred solution of the utility model, the liquid inlet pipe and the liquid outlet pipe are made of fluoroplastics.

[0011] To implement the above technical solution, the liquid inlet pipe and the liquid outlet pipe are made of materials with high hardness and mechanical strength to avoid deformation caused by long-term squeezing of the main power line and the ground line.

[0012] As a preferred solution of the present utility model, the power line insulation layer is made of cross-linked polyolefin material.

[0013] As a preferred solution of the present invention, the ground wire insulation layer is made of cross-linked polyolefin material.

[0014] As described above, the utility model provides a small outer diameter liquid-cooled charging cable, which has the following beneficial effects:

[0015] The utility model provides a small outer diameter liquid-cooled charging cable, comprising an outer sheath formed with an inner cavity, an auxiliary power line and a signal line group arranged in the inner cavity of the outer sheath, and also comprising: a liquid inlet pipe, arranged in the center of the inner cavity of the outer sheath; 2n main power lines, arranged in the inner cavity of the outer sheath and symmetrically arranged on the outer periphery of the liquid inlet pipe, the two end points of the outer arc surface of each main power line and the line connecting the center of the tube circle of the liquid inlet pipe form a fan shape, and the arc shape of the inner arc surface of each main power line is adapted to the arc shape of the outer circumference of the liquid inlet pipe; a ground wire, arranged in the inner cavity of the outer sheath and arranged around the outer circumference of the liquid inlet pipe, the two end points of the outer arc surface of the ground wire and the line connecting the center of the tube circle of the liquid inlet pipe form a fan shape, and the arc shape of the inner arc surface of the ground wire is adapted to the arc shape of the outer circumference of the liquid inlet pipe; a liquid outlet pipe, arranged in the inner cavity of the outer sheath and forming a cooling liquid circulation channel with the liquid inlet pipe; the auxiliary power line and the signal line group are arranged in the gap between the liquid inlet pipe, the liquid outlet pipe, the main power line and the ground wire. It has a spatial design based on the inner cavity of the outer sheath, and the main power line and the ground wire are designed to have an inner arc shape that matches the outer circumferential arc shape of the liquid inlet pipe. The arc shape of the outer arc surface is larger than the arc shape of the inner arc surface. At the same time, the auxiliary power line and the signal line group are arranged in the gap between the liquid inlet pipe, the liquid outlet pipe, the main power line and the ground wire, thereby achieving effective utilization of the inner cavity space of the outer sheath and reducing the outer diameter of the liquid-cooled charging cable. At the same time, the main power line and the ground wire are arranged around the outer circumference of the liquid inlet pipe, and when the coolant flows through the liquid inlet pipe, it takes away the heat generated in the charging process, thereby achieving a cooling effect and ensuring the stability of charging. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 Shown is a schematic cross-sectional view of an embodiment of the present invention.

[0017] The numbers and letters in the figure represent the corresponding component names:

[0018] 1. Outer sheath; 2. Auxiliary power line; 3. Signal line group; 4. Liquid inlet pipe; 5. Liquid outlet pipe; 6. Main power line; 61. Center conductor of power line; 62. Insulation layer of power line; 7. Ground wire; 71. Center conductor of ground wire; 72. Insulation layer of ground wire. DETAILED DESCRIPTION

[0019] The following is a description of the implementation of the present invention by means of specific embodiments. People familiar with the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.

[0020] See also Figure 1It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings in this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the utility model, so they have no substantial technical significance. Any modification of the structure, change in the proportion relationship, or adjustment of the size should still fall within the scope of the technical content disclosed by the utility model without affecting the effects and purposes that can be achieved by the utility model. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" quoted in this specification are only for the convenience of description, and are not used to limit the scope of the implementation of the utility model. The change or adjustment of their relative relationship should also be regarded as the scope of the implementation of the utility model without substantially changing the technical content.

[0021] See also Figure 1 The utility model provides a small outer diameter liquid-cooled charging cable, including an outer sheath 1 formed with an inner cavity, a liquid inlet pipe 4, 2n main power lines 6, a ground line 7, an auxiliary power line 2, a signal line group 3 and a liquid outlet pipe 5 arranged in the inner cavity of the outer sheath 1.

[0022] Specifically, the liquid inlet pipe 4 is arranged at the center of the inner cavity of the outer sheath 1, and 2n main power lines 6 are symmetrically arranged on the outer periphery of the liquid inlet pipe 4. In this embodiment, there are two main power lines 6. Figure 1 As shown, they are symmetrically arranged on the outer circumference of the liquid inlet pipe 4. The lines connecting the two end points of the outer arc surface of each main power line 6 and the center of the tube circle of the liquid inlet pipe 4 form a fan shape, and the arc shape of the inner arc surface of each main power line 6 is adapted to the arc shape of the outer circumference of the liquid inlet pipe 4. Each main power line 6 includes a power line center conductor 61 that is compactly arranged to form the inner and outer arc surfaces of the main power line 6, and a power line insulation layer 62 wrapped around the outer circumference of the power line center conductor 61. Among them, the power line insulation layer 62 is made of cross-linked polyolefin material.

[0023] Specifically, the ground wire 7 is arranged around the outer circumference of the liquid inlet pipe 4. In this embodiment, there is one ground wire 7. Figure 1 As shown, the ground wire 7 is arranged between two main power lines 6, and the connecting line of the centers of the tube circles of the liquid inlet pipe 4 at the two ends of the outer arc surface of the ground wire 7 forms a sector shape, and the arc shape of the inner arc surface of the ground wire 7 is adapted to the arc shape of the outer circumference of the liquid inlet pipe 4. The ground wire 7 includes a central conductor of the ground wire 7 which is compactly arranged to form the inner and outer arc surfaces of the main power line 6, and an insulating layer of the ground wire 7 which is wrapped around the outer periphery of the central conductor of the ground wire 7. Among them, the insulating layer of the ground wire 7 is made of a cross-linked polyolefin material.

[0024] The arc shape of the inner arc surface of the main power line 6 and the ground line 7 are both adapted to the arc shape of the outer circumference of the liquid inlet tube 4, which can achieve a close fit between the main power line 6 and the liquid inlet tube 4, and between the ground line 7 and the liquid inlet tube 4, and realize the effective use of the inner cavity space of the outer sheath 1. The center conductor 61 of the power line and the center conductor of the ground line 7 are tightly arranged, so that the contact between the conductor monofilaments is closer and the gap is smaller, thereby having the advantages of smaller resistance, larger current, and smaller temperature rise under current-carrying state, that is, the same cross-section conductor is achieved, the charging current is larger, and the charging efficiency is higher. The main power line 6 and the ground line 7 are arranged around the outer circumference of the liquid inlet tube 4. While the coolant circulates in the liquid inlet tube 4, it takes away the heat generated by the main power line 6 and the ground line 7 during the charging process, achieving a cooling effect and ensuring the stability of charging.

[0025] Specifically, the liquid outlet pipe 5 and the liquid inlet pipe 4 form a cooling liquid circulation channel, such as Figure 1 As shown, in this embodiment, the liquid outlet pipe 5 is arranged on the opposite side of the ground wire 7. The auxiliary power line 2 and the signal line group 3 are arranged in the gap between the liquid inlet pipe 4, the liquid outlet pipe 5, the ground wire 7, and the main power line 6, realizing the effective utilization of the space of the inner cavity of the outer sheath 1 and reducing the outer diameter of the liquid-cooled charging cable. In order to prevent the liquid inlet pipe 4 and the liquid outlet pipe 5 from being deformed under the long-term extrusion of the main power line 6 and the ground wire 7, the liquid inlet pipe 4 and the liquid outlet pipe 5 are made of materials with high hardness and mechanical strength. In this embodiment, the liquid inlet pipe 4 and the liquid outlet pipe 5 are made of fluoroplastic drawn tubes.

[0026] The small outer diameter liquid-cooled charging cable provided by the utility model has a main power line 6 and a ground line 7 designed to have an inner arc surface that matches the outer circumferential arc of the liquid inlet pipe 4. The arc of the outer arc surface is larger than the arc of the inner arc surface, so that the space of the inner cavity of the outer sheath 1 is arranged tightly. The liquid-cooled charging cable with a charging current of 300A can be reduced from an original outer diameter of more than 40mm to 30mm, which improves the convenience of the user's hand holding, especially the convenience of use for small hands and female groups. The main power line 6 and the ground line 7 are arranged around the outer periphery of the liquid inlet pipe 4. While the coolant circulates in the liquid inlet pipe 4, it takes away the heat generated by the main power line 6 and the ground line 7 during the charging process, achieving a cooling effect and ensuring the stability of charging.

[0027] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the technology may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical concept disclosed in the present invention shall still be covered by the claims of the present invention.

Claims

1. A small outer diameter liquid-cooled charging cable, comprising an outer sheath (1) having an inner cavity, an auxiliary power line (2) and a signal line group (3) arranged in the inner cavity of the outer sheath (1), It is characterized in that Also includes: A liquid inlet pipe (4) is arranged at the center of the inner cavity of the outer sheath (1); 2n main power lines (6) are arranged in the inner cavity of the outer sheath (1) and are symmetrically arranged on the outer circumference of the liquid inlet pipe (4), the lines connecting the two end points of the outer arc surface of each main power line (6) and the center of the tube circle of the liquid inlet pipe (4) form a fan shape, and the arc shape of the inner arc surface of each main power line (6) is adapted to the arc shape of the outer circumference of the liquid inlet pipe (4); A ground wire (7) is arranged in the inner cavity of the outer sheath (1) and surrounds the outer circumference of the liquid inlet pipe (4), the two end points of the outer arc surface of the ground wire (7) and the line connecting the center of the tube circle of the liquid inlet pipe (4) form a fan shape, and the arc shape of the inner arc surface of the ground wire (7) is adapted to the arc shape of the outer circumference of the liquid inlet pipe (4); A liquid outlet pipe (5) is arranged in the inner cavity of the outer sheath (1) and forms a cooling liquid circulation channel with the liquid inlet pipe (4); The auxiliary power line (2) and the signal line group (3) are arranged in the gap between the liquid inlet pipe (4), the liquid outlet pipe (5), the main power line (6) and the ground line (7).

2. A small outer diameter liquid-cooled charging cable according to claim 1, It is characterized in that The main power line (6) comprises a power line center conductor (61) which is densely compressed and arranged to form an inner arc surface and an outer arc surface of the main power line (6), and a power line insulation layer (62) wrapped around the outer periphery of the power line center conductor (61).

3. A small outer diameter liquid-cooled charging cable according to claim 1, It is characterized in that The ground wire (7) comprises a ground wire (7) central conductor which is densely compressed and arranged to form an inner arc surface and an outer arc surface of the ground wire (7), and a ground wire (7) insulating layer which is wrapped around the outer periphery of the ground wire (7) central conductor.

4. A small outer diameter liquid-cooled charging cable according to claim 1, It is characterized in that The liquid inlet pipe (4) and the liquid outlet pipe (5) are made of fluoroplastics.

5. A small outer diameter liquid-cooled charging cable according to claim 2, It is characterized in that The power line insulation layer (62) is made of cross-linked polyolefin material.

6. A small outer diameter liquid-cooled charging cable according to claim 3, It is characterized in that The insulation layer of the ground wire (7) is made of cross-linked polyolefin material.

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