Flexible low-temperature-resistant liquid cooling charging pile and cable

Abstract

The flexible low-temperature-resistant liquid cooling charging pile comprises an electric wire body, the outer side of the electric wire body is sequentially sleeved with a heat dissipation layer and a protection layer, a liquid cooling interlayer cavity is formed in the heat dissipation layer, and the two ends of the liquid cooling interlayer cavity are fixedly connected with a liquid guide hose and a backflow pipe respectively; the liquid guide hose is connected with the backflow pipe through a heat dissipation device, the heat dissipation device comprises a bottom plate, two supporting rods are fixedly connected to the upper side of the bottom plate, a heat dissipation barrel is fixedly connected between the two supporting rods, and a heat dissipation spiral channel is formed in the side wall of the heat dissipation barrel. Through mutual cooperation of the liquid cooling interlayer cavity, the heat dissipation spiral channel, the rotating disc, the motor, the rotating rod, the extrusion block and other components, liquid cooling heat dissipation can be rapidly performed on heat generated in the cable, safe use of the cable and the charging pile is ensured, and the service life of the cable is prolonged.

Description

Technical Field

[0001] The present invention relates to the technical field of new energy vehicle charging equipment, and in particular to a flexible low-temperature resistant liquid-cooled charging pile and cable. Background Art

[0002] In recent years, with the development of technologies such as automotive rechargeable batteries and motors, the proportion of pure electric / plug-in electric vehicles has increased year by year. The rapid growth of electric vehicle ownership has led to a year-on-year increase in consumer demand for charging piles. At present, the number of charging piles is still relatively small and the charging speed is slow. Taking the charging of electric vehicles with a range of 600KM as an example, the existing charging piles take at least 30 minutes to charge to 80% of the range of the car. The charging waiting time is long, and the charging time is significantly higher than the refueling time of fuel vehicles.

[0003] In order to shorten the charging time, people began to use high-current cables. However, when charging with high current for a long time, the conductor in the cable will produce a significant Joule heating effect, causing the temperature of the high-current-carrying cable to rise sharply, affecting the service life of the cable. In order to effectively reduce the temperature of the charging pile cable, the present invention proposes a flexible low-temperature resistant liquid-cooled charging pile cable. Summary of the invention

[0004] The present invention provides a flexible low-temperature resistant liquid-cooled charging pile and cable to solve the problems raised in the above background technology.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions: A flexible low-temperature resistant liquid-cooled cable comprises a wire body, the outer side of which is sequentially sleeved with a heat dissipation layer and a protective layer, a liquid-cooling interlayer cavity is provided in the heat dissipation layer, a liquid-conducting hose and a return pipe are respectively fixedly connected at both ends of the liquid-cooling interlayer cavity, the liquid-conducting hose is connected to the return pipe through a heat dissipation device, the heat dissipation device comprises a base plate, two support rods are fixedly connected to the upper side of the base plate, a heat dissipation tube is fixedly connected between the two support rods, a heat dissipation spiral channel is provided in the side wall of the heat dissipation tube, one end of the liquid-conducting hose facing away from the heat dissipation layer is connected to the bottom end of the heat dissipation spiral channel in the heat dissipation tube, the upper end of the heat dissipation spiral channel is connected to one end of the return pipe, and a conveying device is provided on the liquid-conducting hose.

[0006] Preferably, the conveying device includes a mounting cylinder, which is fixedly connected to the upper side of the base plate, and the upper end of the mounting cylinder is fixedly connected to a disc shell, a turntable is rotatably connected inside the disc shell, an annular cavity is formed between the circumferential side wall of the turntable and the inner side wall of the disc shell, a section of the liquid guiding hose is located in the annular cavity, both ends of the liquid guiding hose pass through the side walls of the disc shell, two extrusion blocks are fixedly connected to the circumferential side walls of the turntable, and both extrusion blocks are located in the annular cavity, a motor is fixedly connected to the inside of the mounting cylinder, and the output shaft of the motor is fixedly connected to a rotating rod, the rotating rod passes through the side walls of the disc shell and the turntable, and the turntable is fixedly connected to the rotating rod.

[0007] Preferably, a fan blade is fixedly connected to the upper end of the rotating rod, and the fan blade is located directly below the heat dissipation cylinder.

[0008] Preferably, a plurality of first heat-conducting metal sheets are fixedly connected to the outer wall of the protective layer, a plurality of second heat-conducting metal sheets are fixedly connected to the inner wall of the liquid-cooled interlayer cavity of the heat dissipation layer, a flexible heat-conducting column is fixedly connected between each of the first heat-conducting metal sheets and the corresponding second heat-conducting metal sheet, and the flexible heat-conducting column passes through the side walls of the protective layer and the heat dissipation layer.

[0009] Preferably, the first heat-conducting metal sheet and the second heat-conducting metal sheet are both made of copper sheet, and the flexible heat-conducting column is a heat-conducting silicone column.

[0010] Preferably, the heat dissipation layer is made of insulating heat-conducting rubber material.

[0011] Preferably, the heat dissipation spiral channel is arranged in a spiral shape, so that the heat transfer liquid flows in the heat dissipation spiral channel for a longer time and the heat dissipation effect is better.

[0012] Preferably, the heat dissipation tube is made of copper material with high thermal conductivity.

[0013] The present invention also provides a flexible low-temperature-resistant liquid-cooled charging pile, which includes any one of the flexible low-temperature-resistant liquid-cooled cables described above.

[0014] Compared with the prior art, the present invention has the following beneficial effects: The present invention can quickly perform liquid cooling to dissipate heat generated in the cable by arranging a liquid cooling interlayer cavity, a heat dissipation spiral channel, a turntable, a motor, a rotating rod, an extrusion block and other components to cooperate with each other, thereby ensuring the safe use of the cable and the charging pile and extending the service life of the cable.

[0015] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention and implement it according to the contents of the specification, the following is a detailed description of the preferred embodiments of the present invention in conjunction with the accompanying drawings. The specific implementation of the present invention is given in detail by the following embodiments and their accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings: Figure 1 This is a schematic structural diagram of a flexible low-temperature resistant liquid-cooled cable proposed by the present invention; Figure 2 This is a schematic diagram of the internal structure of the protective layer cross section proposed by the present invention; Figure 3 This is a schematic diagram of a front cross-sectional structure of a flexible low-temperature resistant liquid-cooled cable proposed by the present invention; Figure 4 It is a schematic diagram of the internal cross-sectional structure of the protective layer proposed by the present invention; Figure 5 It is a schematic diagram of the front cross-sectional structure of the disc shell and the mounting cylinder in the present invention; Figure 6 It is a schematic diagram of the top cross-sectional structure of the disc shell in the present invention.

[0017] In the accompanying drawings, the components represented by the reference numerals are listed as follows: 1. Bottom plate; 2. Fan blades; 3. Disc shell; 4. Mounting tube; 5. Liquid guide hose; 6. Support rod; 7. Heat dissipation tube; 8. Return pipe; 9. Protective layer; 10. First heat-conducting metal sheet; 11. Heat dissipation layer; 12. Second heat-conducting metal sheet; 13. Flexible heat-conducting column; 14. Wire body; 15. Liquid-cooled interlayer cavity; 16. Heat dissipation spiral channel; 17. Turntable; 18. Motor; 19. Rotating rod; 20. Extrusion block. DETAILED DESCRIPTION

[0018] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention. The present invention is described in more detail by way of example with reference to the accompanying drawings in the following paragraphs. It should be noted that the accompanying drawings are all in a very simplified form and are not in precise proportions, and are only used to facilitate and clearly assist in explaining the purpose of the embodiments of the present invention.

[0019] It should be noted that when a component is referred to as being "fixed to" another component, it may be directly on the other component or there may also be a component centered. When a component is considered to be "connected to" another component, it may be directly connected to the other component or there may also be a component centered. When a component is considered to be "set on" another component, it may be directly set on the other component or there may also be a component centered. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0020] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which the present invention belongs. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0021] See also Figure 1 to Figure 6 In an embodiment of the present invention, a flexible low-temperature resistant liquid-cooled cable includes a wire body 14, a heat dissipation layer 11 and a protective layer 9 are sequentially sleeved on the outer side of the wire body 14, the heat dissipation layer 11 is made of insulating heat-conducting rubber material, a liquid-cooling interlayer cavity 15 is opened in the heat dissipation layer 11, and the liquid-cooling interlayer cavity 15 is filled with heat-conducting liquid, and the two ends of the liquid-cooling interlayer cavity 15 are respectively fixedly connected with a liquid-conducting hose 5 and a return pipe 8, and the liquid-conducting hose 5 is connected to the return pipe 8 through a heat dissipation device, and the heat dissipation device includes a bottom plate 1, and the upper side of the bottom plate 1 is fixedly connected with two support A heat dissipation tube 7 is fixedly connected between the two support rods 6. The heat dissipation tube 7 is made of copper material with high thermal conductivity. A heat dissipation spiral channel 16 is opened in the side wall of the heat dissipation tube 7. The heat dissipation spiral channel 16 is arranged in a spiral shape, so that the heat transfer liquid flows in the heat dissipation spiral channel 16 for a longer time and the heat dissipation effect is better. One end of the liquid guiding hose 5 away from the heat dissipation layer 11 is connected to the bottom end of the heat dissipation spiral channel 16 in the heat dissipation tube 7, and the upper end of the heat dissipation spiral channel 16 is connected to one end of the return pipe 8. A conveying device is provided on the liquid guiding hose 5.

[0022] The conveying device includes a mounting cylinder 4, which is fixedly connected to the upper side of the bottom plate 1, and the upper end of the mounting cylinder 4 is fixedly connected to a disc shell 3, and a turntable 17 is rotatably connected inside the disc shell 3, and an annular cavity is formed between the circumferential side wall of the turntable 17 and the inner side wall of the disc shell 3, and a section of the liquid guiding hose 5 is located in the annular cavity, and both ends of the liquid guiding hose 5 pass through the side wall of the disc shell 3, and two extrusion blocks 20 are fixedly connected to the circumferential side wall of the turntable 17, and the two extrusion blocks 20 are both located in the annular cavity, and the inside of the mounting cylinder 4 is fixedly connected to a motor 18, and the output shaft of the motor 18 is fixedly connected to a rotating rod 1 9, the rotating rod 19 passes through the side wall of the disc shell 3 and the turntable 17, the turntable 17 is fixedly connected to the rotating rod 19, the upper end of the rotating rod 19 is fixedly connected with the fan blade 2, the fan blade 2 is located directly below the heat dissipation tube 7, the motor 18 can drive the turntable 17 to rotate through the rotating rod 19, and the rotation of the turntable 17 can drive the two extrusion blocks 20 on its side wall to alternately circulate and squeeze the liquid guiding hose 5, so that the liquid guiding hose 5 generates suction. The suction generated by the liquid guiding hose 5 can allow the heat-conducting liquid in the liquid-cooling interlayer cavity 15 to enter the heat dissipation spiral channel 16 in the heat dissipation tube 7 through the liquid guiding hose 5.

[0023] Specifically, a plurality of first heat-conducting metal sheets 10 are fixedly connected to the outer wall of the protective layer 9, and a plurality of second heat-conducting metal sheets 12 are fixedly connected to the inner wall of the liquid-cooled interlayer cavity 15 of the heat dissipation layer 11. A flexible heat-conducting column 13 is fixedly connected between each first heat-conducting metal sheet 10 and the corresponding second heat-conducting metal sheet 12. The flexible heat-conducting column 13 runs through the side walls of the protective layer 9 and the heat dissipation layer 11. The first heat-conducting metal sheet 10 and the second heat-conducting metal sheet 12 are both made of copper sheets, and the flexible heat-conducting column 13 is a heat-conducting silicone column. The heat-conducting liquid in the liquid-cooled interlayer cavity 15 can transfer part of the heat to the first heat-conducting metal sheet 10 through the second heat-conducting metal sheet 12 and the flexible heat-conducting column 13. The first heat-conducting metal sheet 10 is in contact with the outside air, and the first heat-conducting metal sheet 10 can quickly reduce its own temperature; at the same time, the plurality of flexible heat-conducting columns 13 can also form a supporting effect on the protective layer 9 and the heat dissipation layer 11, so that the cable has a higher pressure resistance effect.

[0024] The working principle of the present invention is: When the cable of the charging pile is used and the wire body 14 generates high temperature, the heat generated by the wire body 14 will be thermally transferred to the heat-conducting liquid in the liquid-cooling interlayer cavity 15 through the heat dissipation layer 11, and then the motor 18 can be started. The motor 18 can drive the turntable 17 to rotate through the rotating rod 19. The rotation of the turntable 17 can drive the two extrusion blocks 20 on its side wall to alternately circulate and squeeze the liquid-conducting hose 5, so that the liquid-conducting hose 5 generates suction. The suction generated by the liquid-conducting hose 5 can drive the heat-conducting liquid in the liquid-cooling interlayer cavity 15 through the liquid-conducting hose 5 into the heat-dissipating spiral channel 16 in the heat-dissipating tube 7. After the high-temperature heat-conducting liquid enters the heat-dissipating spiral channel 16, it will quickly dissipate heat. Then, the low-temperature heat-conducting liquid will flow back from the reflux pipe 8 to the liquid-cooling interlayer cavity 15, and the wire body 14 will be liquid-cooled and cooled in a continuous cycle. The rotation of the rotating rod 19 can drive the fan blades 2 to rotate, and the airflow generated by the fan blades 2 can be blown toward the heat dissipation tube 7, thereby improving the cooling effect of the heat dissipation tube 7 on the liquid in the heat dissipation spiral channel 16.

[0025] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Any ordinary technician in the industry can smoothly implement the present invention as shown in the drawings and described above. However, any equivalent changes, modifications and evolutions made by technicians familiar with the profession without departing from the scope of the technical solution of the present invention using the technical content disclosed above are all equivalent embodiments of the present invention. At the same time, any equivalent changes, modifications and evolutions made to the above embodiments based on the essential technology of the present invention are still within the protection scope of the technical solution of the present invention.

Claims

1. A flexible low-temperature resistant liquid-cooled cable, comprising a wire body (14), characterized in that: The outer side of the electric wire body (14) is sequentially sleeved with a heat dissipation layer (11) and a protective layer (9); a liquid cooling interlayer cavity (15) is provided in the heat dissipation layer (11); a liquid guiding hose (5) and a return pipe (8) are respectively fixedly connected at both ends of the liquid cooling interlayer cavity (15); the liquid guiding hose (5) is connected to the return pipe (8) via a heat dissipation device; the heat dissipation device comprises a bottom plate (1); two support rods (6) are fixedly connected to the upper side of the bottom plate (1); a heat dissipation tube (7) is fixedly connected between the two support rods (6); a heat dissipation spiral channel (16) is provided in the side wall of the heat dissipation tube (7); one end of the liquid guiding hose (5) facing away from the heat dissipation layer (11) is connected to the bottom end of the heat dissipation spiral channel (16) in the heat dissipation tube (7); the upper end of the heat dissipation spiral channel (16) is connected to one end of the return pipe (8); and a conveying device is provided on the liquid guiding hose (5).

2. A flexible low-temperature resistant liquid-cooled cable according to claim 1, characterized in that: The conveying device comprises a mounting cylinder (4), the mounting cylinder (4) being fixedly connected to the upper side of the base plate (1), the upper end of the mounting cylinder (4) being fixedly connected to a disc shell (3), a rotating disk (17) being rotatably connected inside the disc shell (3), an annular cavity being formed between a circumferential side wall of the rotating disk (17) and an inner side wall of the disc shell (3), a section of the liquid guiding hose (5) being located in the annular cavity, both ends of the liquid guiding hose (5) passing through the side wall of the disc shell (3), two extrusion blocks (20) being fixedly connected to the circumferential side wall of the rotating disk (17), both of the two extrusion blocks (20) being located in the annular cavity, a motor (18) being fixedly connected inside the mounting cylinder (4), an output shaft of the motor (18) being fixedly connected to a rotating rod (19), the rotating rod (19) passing through the side wall of the disc shell (3) and the rotating disk (17), the rotating disk (17) being fixedly connected to the rotating rod (19).

3. A flexible low-temperature resistant liquid-cooled cable according to claim 2, characterized in that: The upper end of the rotating rod (19) is fixedly connected to a fan blade (2), and the fan blade (2) is located directly below the heat dissipation cylinder (7).

4. A flexible low-temperature resistant liquid-cooled cable according to claim 3, characterized in that: A plurality of first heat-conducting metal sheets (10) are fixedly connected to the outer wall of the protective layer (9), a plurality of second heat-conducting metal sheets (12) are fixedly connected to the inner wall of the liquid-cooling interlayer cavity (15) of the heat dissipation layer (11), a flexible heat-conducting column (13) is fixedly connected between each of the first heat-conducting metal sheets (10) and the corresponding second heat-conducting metal sheet (12), and the flexible heat-conducting column (13) penetrates the side walls of the protective layer (9) and the heat dissipation layer (11).

5. A flexible low-temperature resistant liquid-cooled cable according to claim 4, characterized in that: The first heat-conducting metal sheet (10) and the second heat-conducting metal sheet (12) are both made of copper sheet material, and the flexible heat-conducting column (13) is made of heat-conducting silicone column.

6. A flexible low-temperature resistant liquid-cooled cable according to claim 5, characterized in that: The heat dissipation layer (11) is made of insulating heat-conducting rubber material.

7. A flexible low-temperature resistant liquid-cooled cable according to claim 6, characterized in that: The heat dissipation spiral channel (16) is arranged in a spiral shape, so that the heat transfer fluid flows in the heat dissipation spiral channel (16) for a longer time, thereby achieving a better heat dissipation effect.

8. A flexible low-temperature resistant liquid-cooled cable according to claim 7, characterized in that: The heat dissipation tube (7) is made of copper material with high thermal conductivity.

9. A flexible low-temperature resistant liquid-cooled charging pile, characterized in that: The charging pile includes the flexible low-temperature resistant liquid-cooled cable described in any one of claims 1 to 8.

Images