Liquid-cooled charging cable

Abstract

The utility model relates to a liquid-cooled charging cable, which comprises 2n main power wire cores, each main power wire core comprises a plurality of groups of conductor layers and insulating layers, the conductor layers and the insulating layers are sequentially arranged at intervals, the insulating layers wrap the outer sides of the conductor layers, and cooling liquid circulates in gaps between the conductor layers and the inner sides of the insulating layers; a signal line group; a ground wire; the main power wire core, the signal wire group and the ground wire are twisted to form a cable wire core; the outer sheath is wound on the outer side of the cable wire core in a wrapping manner; a plurality of filling ropes, wherein the plurality of filling ropes are filled in a gap between the cable core and the outer sheath; the conductor layer emits heat in the charging working process, the cooling liquid flowing in the gap between the conductor layer and the inner side of the insulating layer makes full contact with the conductor layer so as to exchange heat with the conductor layer, and therefore heat generated by the conductor layer is taken away, cooling of the conductor layer is achieved, and the advantages of being relatively small in outer diameter and good in cooling effect are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of charging cables, in particular to a 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 main method of improving the heat dissipation performance of the charging cable is to add a liquid cooling structure to the charging cable, such as setting the liquid cooling pipeline in parallel with the main power line. This setting structure directly increases the outer diameter of the charging cable and increases the difficulty of charging users to pick up. Based on this, the patent authorization announcement number is: CN 218482000 U Disclosed is a high-efficiency liquid-cooled charging pile cable, comprising 2n main insulating cores, the 2n main insulating cores being evenly spaced around the cable axis, wherein every n main insulating cores are connected in parallel as one phase, the main insulating core comprising a liquid cooling tube, a plurality of conductors surrounding and distributed outside the liquid cooling tube, and an insulating layer wrapped around the outside of the plurality of conductors; a plurality of groups of signal control core groups, a ground wire, a plurality of groups of the signal control core groups and the ground wire being evenly distributed around the cable axis on the outside of the main insulating core, and the main insulating core, the signal control core group and the ground wire being twisted to form a cable core; a cable core tape wrapped around the outside of the cable core, an outer sheath wrapped around the outside of the cable core tape, and a plurality of filling ropes, at least one of the filling ropes being arranged at the cable axis, and the remaining filling ropes being distributed around the cable axis between the cable core and the cable core tape, and being staggered with the signal control core group and the ground wire. In this technical solution, the coolant exchanges heat with the conductor through the wall of the liquid cooling tube, thereby taking away the heat generated by the conductor when it is working, thereby achieving heat dissipation of the conductor.

[0003] In the above technical solution, only one side of the conductor is in contact with the wall of the liquid cooling tube, and the contacting sides achieve heat exchange to realize the function of cooling the conductor. Obviously, the cooling performance of this method needs to be further improved. Utility Model Content

[0004] In view of the above-mentioned shortcomings of the prior art, an object of the present invention is to provide a liquid-cooled charging cable, which has the advantages of a relatively small outer diameter and better heat dissipation and cooling effect.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A liquid-cooled charging cable, comprising:

[0007] 2n main power line cores, the main power line cores comprising a plurality of groups of conductor layers and insulating layers arranged in sequence, the insulating layer being wrapped around the outside of the conductor layer, and a conductive non-corrosive coolant flowing through a gap between the conductor layer and the inner side of the insulating layer;

[0008] Signal line set;

[0009] The main power line core, the signal line group, and the ground wire are twisted to form a cable core;

[0010] An outer sheath, the outer sheath being wrapped around the outer side of the cable core;

[0011] A plurality of filling ropes are filled in the gap between the cable core and the outer sheath.

[0012] To implement the above technical solution, the conductor layer generates heat during the charging process, and the coolant flowing in the gap between the conductor layer and the inner side of the insulating layer contacts the conductor layer in an all-round manner to exchange heat with the conductor layer, thereby taking away the heat generated by the conductor layer and cooling the conductor layer.

[0013] As one of the preferred solutions of the utility model, the conductor layer located at the center of the main power line core is a twisted conductor bundle, and the conductor layer located outside the insulating layer is composed of conductors uniformly arranged around the outer periphery of the inner insulating layer.

[0014] To implement the above technical solution, the conductors are evenly distributed around the outer periphery of the inner insulating layer, so that the contact area between the conductors and the coolant is uniform, thereby avoiding the problem of poor individual or local cooling effects.

[0015] As one of the preferred solutions of the utility model, the main power line core includes three groups of conductor layers and insulation layers which are arranged in sequence and at intervals.

[0016] As one of the preferred solutions of the utility model, the outer periphery of the conductor bundle is wrapped with a thin-walled insulating layer.

[0017] As one of the preferred solutions of the utility model, the outer periphery of the conductor layer arranged around the outer periphery of the inner insulating layer is wrapped with a thin-walled insulating layer.

[0018] As one of the preferred solutions of the utility model, the ground wire includes a ground wire conductor located in the center and a ground wire insulation layer wrapped around the outer periphery of the ground wire conductor.

[0019] As one of the preferred solutions of the present invention, the signal line group includes at least two twisted signal lines.

[0020] As one of the preferred solutions of the utility model, the signal line includes a signal line conductor located in the center, and a signal line insulation layer wrapped around the outer periphery of the signal line conductor.

[0021] As described above, the utility model has the following beneficial effects:

[0022] The present invention provides a liquid-cooled charging cable, comprising: 2n main power cores, the main power cores comprising a plurality of groups of conductor layers and insulation layers arranged in sequence, the insulation layer being wrapped around the outside of the conductor layer, and a coolant flowing through a gap between the conductor layer and the inner side of the insulation layer; a signal line group; a ground line; the main power core, the signal line group, and the ground line are twisted together to form a cable core; an outer sheath, the outer sheath being wrapped around the outside of the cable core; a plurality of filling ropes, the plurality of filling ropes being filled in a gap between the cable core and the outer sheath; the conductor layer generates heat during the charging process, and the coolant flowing through the gap between the conductor layer and the inner side of the insulation layer is in full contact with the conductor layer to exchange heat with the conductor layer, thereby taking away the heat generated by the conductor layer, thereby cooling the conductor layer, and having the advantages of a relatively small outer diameter and a better cooling effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 Shown is a schematic cross-sectional structure diagram of an embodiment of the present utility model.

[0024] Figure 2 Shown is a schematic diagram of the cross-sectional structure of the main power line core of an embodiment of the utility model.

[0025] Figure 3 Shown is a schematic diagram of the cross-sectional structure of a signal line group according to an embodiment of the present utility model.

[0026] The numbers and letters in the figure represent the corresponding component names:

[0027] 1. Main power line core; 11. Conductor layer; 111. Conductor bundle; 12. Insulation layer; 13. Thin-wall insulation layer; 2. Signal line group; 21. Signal line; 211. Signal line conductor; 212. Signal line insulation layer; 3. Ground wire; 31. Ground wire conductor; 32. Ground wire insulation layer; 4. Filling rope; 5. Outer sheath. DETAILED DESCRIPTION

[0028] 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.

[0029] See also Figures 1 to 3It 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.

[0030] See also Figure 1 The utility model provides a liquid-cooled charging cable, including 2n main power cores 1, a signal line group 2 and a ground line 3 which are twisted to form a cable core, an outer sheath 5 is wrapped around the outer side of the cable core, and a plurality of filling ropes 4 are filled in the gap between the cable core and the inner peripheral wall of the outer sheath 5.

[0031] Combination Figure 1 and Figure 2 As shown, the main power line core 1 includes a plurality of groups of conductor layers 11 and insulating layers 12 arranged in sequence, the insulating layer 12 is wrapped around the outside of the conductor layer 11, and a conductive non-corrosive coolant flows through the gaps inside the conductor layer 11 and the insulating layer 12. Specifically, the main power line core 1 in this embodiment includes three groups of conductor layers 11 and insulating layers 12 arranged in sequence, which are a twisted conductor bundle 111 located at the center of the main power line core 1, the conductor bundle 111 is a first conductor layer, a first insulating layer wrapped around the outside of the conductor bundle 111, a second conductor layer composed of uniformly arranged conductors surrounding the outer periphery of the first insulating layer, a second insulating layer wrapped around the outer periphery of the second conductor layer, a third conductor layer composed of uniformly arranged conductors surrounding the outer periphery of the second insulating layer, and a third insulating layer wrapped around the outer periphery of the third conductor layer. A conductive non-corrosive coolant flows through the gaps inside the first conductor layer and the first insulating layer, the gaps inside the second conductor layer and the second insulating layer, and the gaps inside the third conductor layer and the third insulating layer. The conductive non-corrosive coolant is in full contact with the conductor layer 11 and exchanges heat with the conductor layer 11 , and takes away the heat of the conductor layer 11 during the charging process to achieve a cooling effect.

[0032] Preferably, a thin-walled insulating layer 13 is wrapped around the outer periphery of the conductor bundle 111 .

[0033] Preferably, a thin-walled insulating layer 13 is wrapped around the outer periphery of the first conductor layer.

[0034] Preferably, a thin-walled insulating layer 13 is wrapped around the outer periphery of the second conductor layer.

[0035] Preferably, a thin-walled insulating layer 13 is wrapped around the outer periphery of the third conductor layer.

[0036] A channel for the coolant to flow is formed between the thin-walled insulating layer 13 and the insulating layer 12 .

[0037] See also Figure 1 The ground wire 3 includes a ground wire conductor 31 located in the center and a ground wire insulation layer 32 wrapped around the outer periphery of the ground wire conductor 31 .

[0038] Combination Figure 1 and Figure 3 As shown, the signal line group 2 includes at least two twisted signal lines 21 . The signal line 21 includes a signal line conductor 211 located in the center and a signal line insulation layer 212 wrapped around the outer periphery of the signal line conductor 211 .

[0039] Specifically, the working process of the liquid-cooled charging cable disclosed in the utility model is as follows:

[0040] One end of the liquid-cooled charging cable is matched with a charging gun head with a liquid-cooled terminal and a sealing ring structure inside, and the other end is matched with a liquid-cooled charging pile. During the installation process, the liquid-cooled charging cable is not filled with coolant. Before use, a sealing device is installed at both ends of the liquid-cooled charging cable. When in use, the main power line core 1 is connected to the power supply, and the coolant circulation pump located in the charging pile is started synchronously, driving the conductive non-corrosive coolant to circulate in the main power line core 1; during the flow process, the conductive non-corrosive coolant fully contacts the conductor layer 11 of the main power line core 1 and exchanges heat, thereby taking away the heat generated by the conductor layer 11 of the main power line core 1 during operation, so that the conductor layer 11 is quickly cooled down.

[0041] In addition, the coolant exists inside the liquid-cooled charging cable and is protected by the insulating layer 12 and the outer sheath 5. There is no problem of liquid leakage in the outer layer of the liquid-cooled charging cable. Before use, sealing devices are installed at both ends of the liquid-cooled charging cable to ensure that the coolant does not leak.

[0042] In the liquid-cooled charging cable disclosed by the utility model, the coolant flows in the gap between the conductor layer 11 and the insulating layer 12 and is in full contact with the conductor layer 11, so that the heat generated by the conductor layer 11 during operation is taken away in real time during the flow process, thereby realizing rapid heat dissipation of the liquid-cooled charging cable. In addition, the structure does not need to increase the cross-sectional area of ​​the cable core, so that the cable has the advantages of relatively small outer diameter, high heat dissipation efficiency, large current carrying capacity, and easy use.

[0043] 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 liquid-cooled charging cable, characterized in that: include: 2n main power line cores (1), the main power line cores (1) comprising a plurality of groups of conductor layers (11) and insulating layers (12) arranged in sequence and spaced apart from each other, the insulating layer (12) being wrapped around the outside of the conductor layer (11), and a conductive non-corrosive coolant flowing through a gap between the conductor layer (11) and the inner side of the insulating layer (12); Signal line set (2); Ground wire (3); the main power line core (1), the signal line group (2), and the ground wire (3) are twisted together to form a cable core; An outer sheath (5), the outer sheath being wrapped around the outer side of the cable core; A plurality of filling ropes (4), wherein the plurality of filling ropes (4) are filled in the gap between the cable core and the outer sheath.

2. The liquid-cooled charging cable according to claim 1, characterized in that: The conductor layer (11) located at the center of the main power line core (1) is a twisted conductor bundle (111), and the conductor layer (11) located outside the insulating layer (12) is composed of conductors uniformly arranged around the outer periphery of the inner insulating layer (12).

3. The liquid-cooled charging cable according to claim 1 or 2, characterized in that: The main power line core (1) comprises three groups of conductor layers (11) and insulating layers (12) which are arranged in sequence and at intervals.

4. The liquid-cooled charging cable according to claim 2, characterized in that: The outer periphery of the conductor bundle (111) is wrapped with a thin-wall insulation layer (13).

5. The liquid-cooled charging cable according to claim 2 or 4, characterized in that: The outer periphery of the conductor layer (11) arranged around the outer periphery of the inner insulating layer (12) is wrapped with a thin-walled insulating layer (13).

6. The liquid-cooled charging cable according to claim 1, characterized in that: The ground wire (3) comprises a ground wire conductor (31) located at the center, and a ground wire insulation layer (32) wrapped around the outer periphery of the ground wire conductor (31).

7. The liquid-cooled charging cable according to claim 1, characterized in that: The signal line group (2) comprises at least two twisted signal lines (21).

8. The liquid-cooled charging cable according to claim 7, characterized in that: The signal line (21) comprises a signal line conductor (211) located in the center and a signal line insulation layer (212) wrapped around the outer periphery of the signal line conductor (211).

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