Insulating liquid cooling cable

Abstract

The utility model discloses an insulating liquid cooling cable. The insulating liquid-cooled cable comprises a steel braid layer, a liquid-cooled pipe, a wear-resistant layer, an inner pipe and a power line, the inner wall of the steel braid layer is coated and fixedly connected with the outer wall of the inner pipe, and the outer wall of the steel braid layer is coated and fixedly connected with the inner wall of the wear-resistant layer; the liquid cooling pipe penetrates through a pipe hole of the inner pipe, part of the outer wall of the liquid cooling pipe is fixedly connected with the inner wall of the inner pipe, and at least one threading hole is formed in the liquid cooling pipe; the power line penetrates through the threading hole in a clearance mode, and a liquid inlet channel of insulation cooling liquid is formed between the outer wall of the power line and the inner wall of the threading hole. According to the utility model, the diameter of the charging cable is reduced, the strength and the rolling resistance of the liquid cooling cable are improved, the cooling of the power line in the liquid cooling pipe is effectively ensured, and the use safety of the cable is ensured.

Description

Technical Field

[0001] The utility model relates to the field of direct current liquid-cooled high-power charging, in particular to an insulating liquid-cooled cable. Background Art

[0002] With the national policy support for new energy, electric vehicles are becoming more and more popular. At present, the charging time of electric vehicles is basically between 30 and 120 minutes, and users need to endure a long wait. It only takes 10-20 minutes to refuel a fuel vehicle. Therefore, the contradiction between the high market demand for electric vehicles and the long battery charging time is becoming increasingly prominent. In order to shorten the charging time of electric vehicles, the existing technology is to use high-power DC charging to increase the voltage and current. The defect is that increasing the charging current will increase the cable diameter. Due to the current charging environment, usage habits, conductor technology and other factors, this solution increases the weight of the charging cable and makes it bulky overall.

[0003] At present, high-power DC charging equipment is generally unattended, and the cables are exposed outside the charging pile. During the charging process, the cables may be crushed by vehicles. In addition, the cables on the DC charging equipment are relatively long, and in actual use, the cables are often bent. Crushing and bending will cause the liquid in the liquid-cooled cable to stop flowing, and the power conductor cannot be cooled, causing the cable to burn, affecting the safety of the cable. Utility Model Content

[0004] In order to solve one or more of the above problems, the utility model provides an insulated liquid-cooled cable.

[0005] According to one aspect of the utility model, the insulated liquid-cooled cable comprises: a steel braided layer, a liquid-cooling tube, a wear-resistant layer, an inner tube and a power line;

[0006] The inner wall of the steel braided layer is covered and fixedly connected to the outer wall of the inner tube, and the outer wall of the inner tube is covered and fixedly connected to the inner wall of the wear-resistant layer;

[0007] The liquid cooling tube is inserted into the tube hole of the inner tube and a part of its outer wall is fixedly connected to the inner wall of the inner tube, and at least one threading hole is formed inside the liquid cooling tube;

[0008] The power line is passed through the threading hole through a gap, and a liquid inlet channel for insulating coolant is formed between the outer wall of the power line and the inner wall of the threading hole.

[0009] In some embodiments, a liquid return channel for the insulating coolant is formed between the outer wall of the liquid cooling tube and the inner wall of the tube hole of the inner tube.

[0010] In some embodiments, the liquid cooling tube is a special-shaped column, the outer walls of the left and right ends of the special-shaped column are fixedly connected to the inner wall of the inner tube, and at least one threading hole is formed inside the special-shaped column.

[0011] In some embodiments, the outer walls of the left and right ends of the special-shaped column are two arc surfaces with the same diameter as the inner wall of the inner tube, and the arc surfaces are fixedly connected to the inner wall of the inner tube.

[0012] In some embodiments, the liquid cooling tube includes at least two independently arranged non-closed curved tubes, the open end wall of each non-closed curved tube is fixedly connected to the inner wall of the inner tube, and the cavity sealed between the inner wall of the non-closed curved tube and the connected inner wall of the inner tube is a threading hole; or the non-closed curved tube is a semicircular tube.

[0013] In some embodiments, the liquid cooling tube includes at least two independent closed tube bodies, a section of the outer wall of each closed tube body is fixedly connected to the inner wall of the inner tube, and the tube holes of the closed tube body are threading holes; or the closed tube body can be a round tube.

[0014] In some embodiments, the positive power line and the negative power line of the power line are respectively passed through a threading hole.

[0015] In some embodiments, the steel braided layer is braided or wound and fixed between the inner wall of the wear-resistant layer and the outer wall of the inner tube. Or the steel braided layer is 1 to 6 layers.

[0016] In some embodiments, a signal line is further included. The signal line passes through the liquid return channel of the inner tube, and a signal insulation layer is provided on the outer wall of the signal line.

[0017] In some embodiments, the inner tube is made of a rubber tube body with the inner wall coated with a layer of polytetrafluoroethylene;

[0018] Or the insulating coolant is dimethyl silicone oil or transformer oil;

[0019] Or the wear-resistant layer is made of polyolefin thermoplastic elastomer material.

[0020] The beneficial effects of this insulated liquid-cooled cable are: first, a steel braided layer is added between the wear-resistant layer and the inner tube of the liquid-cooled cable, and the steel braided layer increases the strength of the liquid-cooled cable and enhances the crushing resistance of the liquid-cooled cable; second, the liquid-cooling tube is fixed in the inner tube of the liquid-cooling cable to ensure that the liquid-cooling tube does not move or shake in the cable. Combined with the anti-crushing design of the liquid-cooled cable, it ensures that even in harsh operating environments, that is, when the liquid-cooled cable is crushed or bent (the minimum bending radius of the liquid-cooled cable), the liquid cooling tube will not be deformed, and the power inner conductor (power line) is always in a cooled state, effectively ensuring the cooling of the power line in the liquid cooling tube, and ensuring the safety of the cable; thirdly, the steel braided layer of this solution plays the role of shielding and grounding at the same time, saving the grounding wire and shielding layer in the cable, reducing the number of copper wires in the liquid-cooled cable, reducing the diameter of the copper wire, reducing the diameter of the charging cable, thereby reducing the weight of the cable, and relatively increasing the liquid space in the cable, and better increasing the liquid cooling channel, ensuring the safety of cable use and cooling efficiency; fourthly, the liquid return channel is the space formed between the liquid cooling tube and the outer wall of the inner tube. No filler is required in the cable, which improves the cooling effect and reduces the diameter of the charging cable, thereby reducing the weight of the cable and improving the safety performance of the cable. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of an insulated liquid-cooled cable with a special-shaped liquid-cooling tube according to a first embodiment of the present utility model;

[0022] Figure 2 It is a schematic diagram of an insulated liquid-cooled cable with a non-enclosed liquid-cooling tube as shown in the second embodiment of the present utility model;

[0023] Figure 3 It is a schematic diagram of an insulated liquid-cooled cable with a non-enclosed liquid-cooling tube as shown in Embodiment 3;

[0024] Steel braid 1;

[0025] Liquid cooling tube 2, threading hole 21, liquid inlet channel 22, non-closed curved tube 23, special-shaped column 24, closed tube body 25;

[0026] Wear-resistant layer 3; inner tube 4, liquid return channel 40;

[0027] Power line 5, positive power line 51, negative power line 52;

[0028] Signal line 6; signal insulation layer 7. DETAILED DESCRIPTION

[0029] The present invention is further described in detail below in conjunction with the accompanying drawings. It should be noted that the words "front", "rear", "left", "right", "upper" and "lower" used in the following description refer to directions in the accompanying drawings, and the words "inner" and "outer" refer to directions toward or away from the geometric center of a specific component, respectively.

[0030] Figures 1 to 3 An insulated liquid-cooled cable according to an embodiment of the present invention is schematically shown. As shown in the figure, the insulated liquid-cooled cable comprises: a steel braided layer 1, a liquid-cooled tube 2, a wear-resistant layer 3, an inner tube 4 and a power line 5;

[0031] The inner wall of the steel braided layer 1 is covered and fixedly connected to the outer wall of the inner tube 4, and its outer wall is covered and fixedly connected by the inner wall of the wear-resistant layer 3. The steel braided layer 1 can be selected from 1 to 6 layers according to the pressure. Preferably, the steel braided layer 1 is selected from 2 to 4 layers to improve the strength of the cable. The wear-resistant layer 3 is preferably made of polyolefin thermoplastic elastomer material to increase wear resistance;

[0032] At least one threading hole 21 is formed inside the liquid cooling tube 2. The liquid cooling tube 2 is inserted into the tube hole of the inner tube 4 and part of its outer wall is fixedly connected to the inner wall of the inner tube 4. Preferably, the inner tube 4 is preferably made of a rubber material tube body with an inner wall coated with a layer of polytetrafluoroethylene; the insulating coolant is preferably dimethyl silicone oil or transformer oil, and the insulating coolant and the specific material of the inner tube 4 prevent the liquid from corroding the inner tube 4.

[0033] The power line 5 is inserted into the threading hole 21 through a gap, and a liquid inlet channel 22 for insulating coolant is formed between the outer wall of the power line 5 and the inner wall of the threading hole 21 .

[0034] The beneficial effects of this insulated liquid-cooled cable are: first, a steel braided layer 1 is added between the wear-resistant layer 3 and the inner tube 4 of the liquid-cooled cable, and the steel braided layer 1 increases the strength of the liquid-cooled cable and enhances the anti-crushing property of the liquid-cooled cable; second, the liquid-cooling tube 2 is fixed to the inner tube 4 of the liquid-cooled cable to ensure that the liquid-cooling tube 2 does not move or shake in the cable. Combined with the anti-crushing design of the liquid-cooled cable, it ensures that even in harsh operating environments, that is, when the liquid-cooled cable is crushed or bent (the minimum bending radius of the liquid-cooled cable), the liquid-cooling tube 2 will not be deformed, and the power inner conductor (power line 5) is always in a cooled state, effectively ensuring the cooling of the power line 5 in the liquid-cooling tube 2, thereby ensuring the safety of the cable. Thirdly, compared with the prior art in which the grounding wire is placed in the liquid-cooled cable and occupies part of the space of the liquid-cooled cable, the steel braided layer 1 of this solution plays the role of shielding and grounding at the same time, saving the grounding wire and shielding layer in the cable, reducing the number of copper wires in the liquid-cooled cable, reducing the diameter of the copper wire, and reducing the diameter of the charging cable, thereby reducing the weight of the cable, and at the same time relatively increasing the liquid space in the cable, and better increasing the liquid cooling channel, thereby ensuring the safety of cable use and cooling efficiency.

[0035] In some embodiments, a return liquid channel 40 for insulating coolant is also formed between the outer wall of the liquid cooling tube 2 and the inner wall of the tube hole of the inner tube 4. The coolant enters from the liquid inlet channel 22 and flows out from the return liquid channel 40. Or it enters from the return liquid channel 40 and flows out from the liquid inlet channel 22, and the return liquid channel 40 and the liquid inlet channel 22 form a liquid cooling loop. Compared with the current loop formed between several liquid inlet channels 22, or an independent liquid cooling channel is added to form a loop with several liquid inlet channels 22, the liquid cooling channel and the control line are filled with fillers, or the independent liquid cooling channel is not in direct contact with the power inner conductor, but is cooled in a close manner. Such a liquid loop is independently set in the liquid cooling cable to form a loop, and the liquid cooling channel, the power inner conductor, the control line, and the grounding line are filled with fillers. The beneficial effect of this scheme is that the return liquid channel 40 is the space formed between the liquid cooling tube and the outer wall of the inner tube, and no filler is needed in the cable, which improves the cooling effect, while reducing the diameter of the charging cable, thereby reducing the weight of the cable and improving the safety performance of the cable.

[0036] Furthermore, the steel braided layer 1 can be fixed between the inner wall of the wear-resistant layer 3 and the outer wall of the inner tube 4 by braiding or winding. The fixing method of the steel braided layer 1 is preferably a steel wire winding method, and its beneficial effect is that the steel braided layer 1 has a good pressure-bearing effect.

[0037] like Figure 1 As shown, in the first embodiment, the liquid cooling tube 2 of the above scheme is a special-shaped column 24, the left and right outer walls of the special-shaped column 24 are fixedly connected to the inner wall of the inner tube 4, and at least one threading hole 21 is formed inside the special-shaped column 24. Preferably, the left and right outer walls of the special-shaped column 24 are two arc surfaces with the same diameter as the inner wall of the inner tube 4, and the arc surfaces are fixedly connected to the inner wall of the inner tube 4. The beneficial effect is that the structure is tightly connected and easy to manufacture.

[0038] like Figure 2 As shown, in the second embodiment, the liquid cooling tube 2 of the above scheme includes at least two independently arranged non-closed curved tubes 23, the open end wall of each non-closed curved tube 23 is fixedly connected to the inner wall of the inner tube 4, and the cavity sealed between the inner wall of the non-closed curved tube 23 and the inner wall of the inner tube 4 is a threading hole 21; preferably, the non-closed curved tube (23) is a semicircular tube, a semi-elliptical tube, etc. Its beneficial effect is that the structure is tightly connected, easy to manufacture, and has a threading hole 21 with a larger diameter.

[0039] like Figure 3As shown, in the third embodiment, the liquid cooling tube 2 of the above scheme includes at least two independent closed tube bodies 25, a section of the outer wall of each closed tube body 25 is fixedly connected to the inner wall of the inner tube 4, and the tube hole of the closed tube body 25 is a threading hole 21; preferably, the closed tube body 25 can be any closed tube such as a round tube, a square tube, an elliptical tube, etc. The beneficial effect is that the structure is easy to manufacture.

[0040] Preferably, in the above scheme, the power line 5 includes a positive power line 51 and a negative power line 52, two threading holes 21 are symmetrically distributed in the inner tube 4, and the positive power line 51 and the negative power line 52 are respectively passed through a threading hole 21 at a gap.

[0041] Preferably, in the above scheme, a signal line 6 is further included. The signal line 6 is inserted into the liquid return channel 40 of the inner tube 4 , and a signal insulating layer 7 is provided on the outer wall of the signal line 6 .

[0042] The above are only some embodiments of the present invention. For those skilled in the art, several modifications and improvements can be made without departing from the inventive concept of the present invention, which all belong to the protection scope of the present invention.

Claims

1. An insulated liquid-cooled cable, characterized in that: It comprises: a steel braided layer (1), a liquid cooling tube (2), a wear-resistant layer (3), an inner tube (4) and a power line (5); The inner wall of the steel braided layer (1) is covered and fixedly connected to the outer wall of the inner tube (4), and the outer wall of the steel braided layer (1) is covered and fixedly connected to the inner wall of the wear-resistant layer (3); The liquid cooling tube (2) is inserted into the tube hole of the inner tube (4) and a portion of its outer wall is fixedly connected to the inner wall of the inner tube (4); at least one threading hole (21) is formed inside the liquid cooling tube (2); The power line (5) is intermittently passed through the threading hole (21), and an inlet channel (22) for insulating coolant is formed between the outer wall of the power line (5) and the inner wall of the threading hole (21).

2. The insulated liquid-cooled cable according to claim 1, characterized in that: A liquid return channel (40) for the insulating coolant is also formed between the outer wall of the liquid cooling tube (2) and the inner wall of the tube hole of the inner tube (4).

3. The insulated liquid-cooled cable according to claim 1 or 2, characterized in that: The liquid cooling tube (2) is a special-shaped column (24), the outer walls of the left and right ends of the special-shaped column (24) are fixedly connected to the inner wall of the inner tube (4), and at least one threading hole (21) is formed inside the special-shaped column (24).

4. The insulated liquid-cooled cable according to claim 3, characterized in that: The outer walls of the left and right ends of the special-shaped column (24) are two arc surfaces with the same diameter as the inner wall of the inner tube (4), and the arc surfaces are fixedly connected to the inner wall of the inner tube (4).

5. The insulated liquid-cooled cable according to claim 1 or 2, characterized in that: The liquid cooling tube (2) comprises at least two independently arranged non-closed curved tubes (23), the open end wall of each non-closed curved tube (23) is fixedly connected to the inner wall of the inner tube (4), and the cavity in which the inner wall of the non-closed curved tube (23) and the connected inner wall of the inner tube (4) are sealed to each other is the threading hole (21); or the non-closed curved tube (23) is a semicircular tube.

6. The insulated liquid-cooled cable according to claim 1 or 2, characterized in that: The liquid cooling tube (2) comprises at least two independent closed tube bodies (25), a section of the outer wall of each closed tube body (25) is fixedly connected to the inner wall of the inner tube (4), and the tube hole of the closed tube body (25) is the threading hole (21); or the closed tube body (25) can be a round tube.

7. The insulated liquid-cooled cable according to claim 1, characterized in that: The positive power line (51) and the negative power line (52) of the power line (5) are respectively passed through one of the threading holes (21) at intervals.

8. The insulated liquid-cooled cable according to claim 1, characterized in that: The steel braided layer (1) is fixed between the inner wall of the wear-resistant layer (3) and the outer wall of the inner tube (4) by braiding or winding; Or the steel braided layer (1) is 1 to 6 layers.

9. The insulated liquid-cooled cable according to claim 1, characterized in that: It also includes a signal line (6), which is sleeved into the liquid return channel (40) of the inner tube (4), and the outer wall of the signal line (6) is provided with a signal insulation layer (7).

10. The insulated liquid-cooled cable according to claim 1, characterized in that: The inner tube (4) is made of a rubber tube with the inner wall coated with a layer of polytetrafluoroethylene; Or the insulating coolant is dimethyl silicone oil or transformer oil; Or the wear-resistant layer (3) is made of polyolefin thermoplastic elastomer material.

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