Liquid cooling charging cable

Abstract

The utility model discloses a liquid cooling charging cable, and belongs to the technical field of charging cables. Comprising a cable core, an isolating layer and an outer sheath which are sequentially arranged from inside to outside, the cable core comprises two power wire cores, two cooling liquid circulating pipes and a plurality of signal wires, and the two power wire cores and the two cooling liquid circulating pipes are arranged in a cross shape; the cooling liquid circulating pipe is of a fan-shaped structure and is defined by two first arc-shaped surfaces, two avoiding surfaces and a second arc-shaped surface, and the first arc-shaped surfaces and the second arc-shaped surface are matched with the power wire cores and the isolating layer respectively; the two first arc-shaped surfaces are arranged side by side, located on the inner side of the cooling liquid circulating pipe and attached to the corresponding sides of the two power wire cores respectively. The second arc-shaped face is located on the outer side of the cooling liquid circulating pipe and attached to the inner side of the isolation layer. The two receding faces are located between the two ends of the second arc-shaped face and the outer ends of the first arc-shaped faces at the corresponding ends respectively. The receding faces, the power wire cores and the isolating layers define spaces for containing the signal wires, and the multiple signal wires are distributed in the multiple spaces.

Description

Technical Field

[0001] The utility model belongs to the technical field of charging cables, and in particular relates to a liquid-cooled charging cable. Background Art

[0002] New energy and green travel are gradually becoming a new lifestyle. New energy vehicles are facing problems such as slow charging speed, difficulty in finding charging piles, and long waiting time. In order to meet market demand, charging guns must achieve fast charging, increase the conductor cross-section to increase current carrying capacity, and use liquid cooling to remove heat and increase current carrying capacity.

[0003] In the prior art, there are many ways to implement liquid-cooled charging cables, such as the wire core not being in contact with the coolant or the wire core being in direct contact with the coolant. There are also many different ways for the wire core not to be in contact with the coolant, such as the wire core being twisted with the cooling tube, the wire core being located in the cooling tube, or the wire core surrounding the cooling tube.

[0004] The prior art provides a liquid-cooled charging cable, including a cable core, an isolation layer, and an outer sheath, etc., which are arranged in sequence from the inside to the outside. The cable core includes two power cores, two coolant circulation tubes, and multiple signal lines, etc. The two power cores and the two coolant circulation tubes are arranged in a cross shape, and the signal line is located in the space surrounded by the coolant circulation tubes, the signal line, and the sheath. The two power cores are respectively the positive core and the negative core, and both coolant circulation tubes contain coolant. The existing liquid-cooled charging pile cable is to twist the insulated core together with the cooling tube, the cooling tube is in contact with the insulation, and the two cooling tubes form a loop with one in and one out, and the liquid in the cooling tube takes out the heat generated by the cable.

[0005] For example, the patent with application number CN202322499140.5 discloses a flexible liquid-cooled charging cable, including: an inner core, including a wire core and a flexible cooling tube, the wire core includes a ground wire core, two power signal units and two power wire cores, the two power signal units are arranged tangently, the power signal unit includes multiple power wire cores and multiple signal wire cores, multiple power wire cores and multiple signal wire cores are twisted to form the power signal unit, two flexible cooling tubes are provided, each of the flexible cooling tubes is arranged tangently to the two power signal units; a shielding reinforcement layer, wrapped around the outside of the inner core, the shielding reinforcement layer is arranged as a tinned copper wire braided layer, and the gap between the inner core and the shielding reinforcement layer is filled with thermal conductive filling glue.

[0006] This solution has the following problems: the contact area between the two power line cores and the two cooling tubes is limited. Since the coolant and the heat-generating conductor are separated by an insulating layer and the cooling tube wall, heat is transferred slowly, resulting in a temperature difference and a poor cooling effect. Summary of the invention

[0007] The embodiment of the utility model provides a liquid-cooled charging cable, which uses a special-shaped coolant circulation pipe to increase the contact area between the coolant circulation pipe and the power line core, thereby improving the cooling effect. The technical solution is as follows:

[0008] The present invention provides a liquid-cooled charging cable in an embodiment, comprising a cable core, an isolation layer 1 and an outer sheath 2 arranged in sequence from the inside to the outside, wherein the cable core comprises two power line cores 3, two coolant circulation pipes 4 and a plurality of signal lines 5, wherein the two power line cores 3 and the two coolant circulation pipes 4 are arranged in a cross shape; the coolant circulation pipe 4 is a fan-shaped structure, which is surrounded by two first arc-shaped surfaces 41, two avoidance surfaces 42 and a second arc-shaped surface 43, wherein the first arc-shaped surface 41 and the second arc-shaped surface 43 are respectively connected to the power line core 3 and the signal line 5. The isolation layer 1 is matched; the two first curved surfaces 41 are arranged side by side, which are located on the inner side of the coolant circulation pipe 4, and are respectively fitted with the corresponding sides of the two power line cores 3; the second curved surface 43 is located on the outer side of the coolant circulation pipe 4, and is fitted with the inner side of the isolation layer 1; the two avoidance surfaces 42 are respectively located between the two ends of the second curved surface 43 and the outer ends of the first curved surface 41 at the corresponding ends; the avoidance surfaces 42, the power line core 3 and the isolation layer 1 enclose a space 6 for accommodating the signal line 5, and multiple signal lines 5 are distributed in multiple spaces 6.

[0009] Among them, the two power cores 3 in the embodiment of the utility model are respectively a positive electrode core and a negative electrode core and include a core wire harness and an inner sheath outside thereof. The positive electrode core and the negative electrode core are arranged side by side and are close to the isolation layer 1. The two coolant circulation pipes 4 are respectively located on both sides of the two power cores 3.

[0010] Specifically, the avoidance surface 42 in the embodiment of the utility model is perpendicular to the connection line between the two power line cores 3 .

[0011] Specifically, in the embodiment of the utility model, the center angle of the first arc surface 41 is 60-100°, and the center angle of the second arc surface 43 is 55-90°.

[0012] Specifically, the plurality of signal lines 5 in the embodiment of the utility model are arranged in four groups, each group includes 1 to 4 signal lines 5 , and the four groups of signal lines 5 are respectively located in four spaces 6 .

[0013] Preferably, the inner ends of the two first arcuate surfaces 41 in the embodiment of the utility model are connected together and adopt an arc-shaped transition, and the connection between the outer end of the first arcuate surface 41 and the corresponding avoidance surface 42 adopts an arc-shaped transition.

[0014] Among them, the isolation layer 1 in the embodiment of the utility model is a copper wire braided layer, and the coolant circulation pipe 4 is a nylon tube or a fluoroplastic tube and its thickness is 0.5-2.0mm.

[0015] The technical solution provided by the embodiment of the utility model has the following beneficial effects: the embodiment of the utility model provides a liquid-cooled charging cable, which adopts a special-shaped coolant circulation pipe to increase the contact area between the coolant circulation pipe and the power line core, thereby improving the cooling effect. In addition, the special-shaped coolant circulation pipe will take up more space, not only with more coolant, but also improve the space utilization rate, making the space occupied by the signal line smaller and more compact, improving the stability of the signal line, and avoiding the signal line from breaking during the frequent bending and twisting of the charging cable. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic diagram of the structure of an existing liquid-cooled charging cable;

[0017] Figure 2 It is a schematic diagram of the structure of the liquid-cooled charging cable provided by an embodiment of the utility model;

[0018] Figure 3 It is a schematic diagram of the structure of the coolant circulation pipe.

[0019] In the figure: 1 isolation layer, 2 outer sheath, 3 power line core, 4 coolant circulation pipe, 5 signal line, 6 space;

[0020] 41 is a first arcuate surface, 42 is a position-avoiding surface, and 43 is a second arcuate surface. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solutions and advantages of the utility model clearer, the utility model will be further described in detail below with reference to the accompanying drawings.

[0022] Example 1

[0023] See also Figure 2-3 , Embodiment 1 provides a liquid-cooled charging cable, including a cable core, an isolation layer 1 and an outer sheath 2, etc., which are arranged in sequence from the inside to the outside. Among them, the cable core includes two power cores 3, two coolant circulation tubes 4 and multiple signal lines 5 (which can be defined and can realize multiple functions), etc. The two power cores 3 and the two coolant circulation tubes 4 are arranged in a cross shape and twisted. The isolation layer 1 is a copper wire braided layer, and the coolant circulation tube 4 is a nylon tube or a fluoroplastic tube (with high strength) and has a thickness of 0.5-2.0mm. The two power cores 3 are respectively the positive electrode core and the negative electrode core and include a core wire bundle and an inner sheath outside thereof, etc. The positive electrode core and the negative electrode core are arranged side by side and are close to the isolation layer 1, and the two coolant circulation tubes 4 are respectively located on both sides of the two power cores 3. The outer sheath 2 and the inner sheath are consistent with the prior art, and the aforementioned structure is basically consistent with the structure of the existing liquid-cooled charging cable, except that:

[0024] The coolant circulation pipe 4 in this embodiment is a fan-shaped structure, which is surrounded by two first arc-shaped surfaces 41, two avoidance surfaces 42 and a second arc-shaped surface 43. The first arc-shaped surface 41 and the second arc-shaped surface 43 cooperate with the power line core 3 and the isolation layer 1 respectively. The two first arc-shaped surfaces 41 are arranged side by side, which are located on the inner side of the coolant circulation pipe 4, and they are respectively fitted with the corresponding sides of the two power line cores 3, and the center angle of the circle is 60-100°. The inner ends are connected together and an arc transition is adopted. The second arc-shaped surface 43 is located on the outer side of the coolant circulation pipe 4, which is fitted with the inner side of the isolation layer 1, and the center angle of the circle is 55-90°. The connection between its outer end and the corresponding avoidance surface 42 adopts an arc transition. The two avoidance surfaces 42 are respectively located between the two ends of the second arc-shaped surface 43 and the outer ends of the first arc-shaped surface 41 at the corresponding ends, and are arranged perpendicular to the connection line between the two power line cores 3. The avoidance surface 42 , the power line core 3 and the isolation layer 1 enclose a space 6 (specifically, a space similar to an angle, four in total) for accommodating the signal line 5 , and a plurality of signal lines 5 are distributed in the plurality of spaces 6 .

[0025] The cooling effect of this patent is shown in Table 1:

[0026] Table 1

[0027]

[0028] Among them, the prior art 1 is a method of twisting the wire core and the cooling tube together, see Figure 1 ; The prior art 2 is that the wire core is located in the cooling tube and is in direct contact with the coolant. This patent has the same design concept as the prior art 1, but the cooling effect is better than that of the prior art 1, but still cannot catch up with the prior art 2. Wherein, T represents the maximum long-term conductor temperature, in degrees Celsius.

[0029] Example 2

[0030] See also Figure 2 Embodiment 2 provides a liquid-cooled charging cable, and its structure is basically the same as that of Embodiment 1, except that: the two power line cores 3 in this embodiment are arranged side by side, the two coolant circulation pipes 4 are respectively located on the upper and lower sides of the two power line cores 3, and the two first arc-shaped surfaces 41 are arranged side by side.

[0031] Example 3

[0032] See also Figure 2 Embodiment 3 provides a liquid-cooled charging cable, and its structure is basically the same as that of Embodiment 1, except that: the multiple signal lines 5 in this embodiment are arranged in four groups, each group includes 1-4 signal lines 5, and the four groups of signal lines 5 are respectively located in four spaces 6.

[0033] The “first” and “second” in this embodiment are only used for distinction and have no other special meanings.

[0034] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A liquid-cooled charging cable, comprising a cable core, an isolation layer (1) and an outer sheath (2) arranged in sequence from the inside to the outside, the cable core comprising two power line cores (3), two coolant circulation pipes (4) and a plurality of signal lines (5), the two power line cores (3) and the two coolant circulation pipes (4) being arranged in a cross shape; characterized in that: The coolant circulation pipe (4) is a fan-shaped structure, which is surrounded by two first arcuate surfaces (41), two avoidance surfaces (42) and a second arcuate surface (43), wherein the first arcuate surface (41) and the second arcuate surface (43) respectively cooperate with the power line core (3) and the isolation layer (1); the two first arcuate surfaces (41) are arranged side by side, and are located on the inner side of the coolant circulation pipe (4), and are respectively in contact with the corresponding sides of the two power line cores (3); the second arcuate surface (43) is located on the outer side of the coolant circulation pipe (4), and is in contact with the inner side of the isolation layer (1); the two avoidance surfaces (42) are respectively located between the two ends of the second arcuate surface (43) and the outer ends of the first arcuate surfaces (41) at the corresponding ends; the avoidance surfaces (42), the power line core (3) and the isolation layer (1) form a space (6) for accommodating the signal line (5), and a plurality of signal lines (5) are distributed in a plurality of spaces (6).

2. The liquid-cooled charging cable according to claim 1, characterized in that: The two power wire cores (3) are respectively a positive wire core and a negative wire core and comprise a core wire harness and an inner sheath thereouter; the positive wire core and the negative wire core are arranged side by side and are closely attached to the isolation layer (1); and the two coolant circulation pipes (4) are respectively located on both sides of the two power wire cores (3).

3. The liquid-cooled charging cable according to claim 1, characterized in that: The avoidance surface (42) is perpendicular to the connection line between the two power line cores (3).

4. The liquid-cooled charging cable according to claim 1, characterized in that: The center angle of the first arcuate surface (41) is 60-100°, and the center angle of the second arcuate surface (43) is 55-90°.

5. The liquid-cooled charging cable according to claim 1, characterized in that: The plurality of signal lines (5) are arranged in four groups, each group comprising 1 to 4 signal lines (5), and the four groups of signal lines (5) are respectively located in four spaces (6).

6. The liquid-cooled charging cable according to claim 1, characterized in that: The inner ends of the two first arcuate surfaces (41) are connected together and adopt an arcuate transition, and the connection between the outer end of the first arcuate surface (41) and the corresponding avoidance surface (42) adopts an arcuate transition.

7. The liquid-cooled charging cable according to claim 1, characterized in that: The isolation layer (1) is a copper wire braided layer, and the coolant circulation pipe (4) is a nylon tube or a fluoroplastic tube with a thickness of 0.5-2.0 mm.

Images