A special cable for charging pile

Abstract

The present invention discloses a special cable for charging piles, which belongs to the field of cable technology, and includes a cable body and a circulation pump assembly. The cable body is composed of a conductive inner core body, a shielded heat exchange body and a magnetic fluid conversion hardened body from the inside to the outside. The magnetic fluid conversion hardened body includes a wrapping layer and a plurality of heat exchange tubes arranged in a spiral winding. A heat exchange conductive liquid is arranged inside the heat exchange tube, and a magnetic fluid is densely arranged outside the heat exchange conductive liquid. The present invention arranges a magnetic fluid conversion hardened body on the outer layer of the cable body. In the storage state, the heat exchange conductive liquid is pressure-free and the magnetic fluid is in a fluid state. In this state, the magnetic fluid conversion hardened body is in a flexible state, which is convenient for winding and plugging and unplugging charging operations. In the charging state, the heat exchange conductive liquid generates pressure under the action of the circulation pump, and the magnetic fluid solidifies under the action of the magnetic field generated by the current of the heat exchange conductive liquid, which can significantly improve the compression resistance of the cable and effectively avoid the cable from being damaged in the charging and use state.

Description

Technical Field

[0001] The present invention relates to the technical field of cables, and in particular to a special cable for charging piles. Background Art

[0002] With the continuous expansion of the new energy electric vehicle market, a large number of charging piles have emerged. The emergence of charging piles has greatly facilitated the charging of new energy vehicles. With the continuous improvement of fast charging technology, the requirements for charging pile cables are getting higher and higher. Traditional cables cannot withstand fast charging requirements, so many special cables designed for charging piles have appeared on the market;

[0003] However, in order to improve the heat dissipation effect, the existing cables are designed with coolant inside, and in order to improve the ability to resist vehicle crushing, the thickness of the cable armor is strengthened. This design makes the existing charging pile cables thicker and thicker. The overly thick and hard structure makes it impossible to be rolled up, and the exposed circuit is easily damaged. It is very laborious to use it for charging. The overly thick structure makes the cable difficult to bend, which is very inconvenient when plugging and unplugging the charging gun. Simply setting the coolant inside is prone to liquid leakage when being crushed, and there is a risk of leakage. For this reason, a special cable for charging piles is proposed. Summary of the invention

[0004] The purpose of the present invention is to solve the problem that the existing charging pile cables are getting thicker and thicker, which is very laborious when used for charging, and the overly thick structure makes the cable difficult to bend, which is very inconvenient when plugging and unplugging the charging gun. The simple internal arrangement of coolant is prone to liquid leakage when being crushed, and there is a hidden danger of leakage. A special cable for charging piles is proposed.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A charging pile dedicated cable, comprising a cable body and a circulating pump assembly, wherein the cable body is composed of a conductive inner core body, a shielding heat exchange body and a magnetic fluid conversion hardening body from the inside to the outside;

[0007] The conductive inner core body is composed of a high-elasticity rubber inner column located in the middle and a conductive copper core distributed on the outer side wall of the high-elasticity rubber inner column, and an inner insulating layer is arranged outside the conductive copper core;

[0008] The shielded heat exchanger comprises a metal shielding layer arranged outside the inner insulating layer, and the outer side wall of the metal shielding layer is provided with a woven mesh layer;

[0009] The magnetic fluid conversion hardened body comprises a wrapping layer and a plurality of heat exchange tubes arranged in a spiral winding manner, a heat exchange conductive liquid is arranged inside the heat exchange tube, a magnetic fluid is densely arranged outside the heat exchange conductive liquid, the wrapping layer comprises an inner isolation braided layer and an outer isolation braided layer, the inner isolation braided layer and the outer isolation braided layer are connected by a plurality of isolation connection layers, and a wear-resistant insulating layer is arranged outside the outer isolation braided layer;

[0010] The circulation pump assembly comprises a circulation pump and a circulation pump pool connected to the circulation pump. A circulation ring is arranged at one end of the two ends of the cable body, and an external connection ring is arranged at the other end.

[0011] Preferably, two adjacent spirally wound heat exchange tubes are provided with a liquid inlet pipe and a liquid outlet pipe, respectively, and a plurality of U-shaped connecting ports are opened inside the circulation ring, and both ends of the U-shaped connecting ports are respectively connected to two adjacent liquid inlet pipes and liquid outlet pipes.

[0012] Preferably, two external connecting rings are provided, which are respectively connected to a plurality of liquid inlet pipes and liquid outlet pipes, and the two external connecting rings are respectively connected to two ends of the circulation pump through connecting pipes.

[0013] Preferably, the isolation connection layer is arranged between two adjacent heat exchange tubes and is arranged in a spiral shape, which can ensure that the magnetic fluid flows around the heat exchange tubes.

[0014] Preferably, the conductive copper core is arranged inside the inner insulating layer and is evenly distributed on the outer side wall of the high-elasticity rubber inner column, and the outside of the conductive copper core is evenly filled with insulating filling material.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. The present invention is designed to address the problem that existing cables are too thick and too hard to be convenient for winding up and plugging and unplugging for charging. A magnetic fluid conversion hardened body is arranged on the outer layer of the cable body. In the stored state, the heat exchange conductive liquid in the magnetic fluid conversion hardened body is pressure-free and the magnetic fluid is in a fluid state. In this state, the magnetic fluid conversion hardened body is in a flexible state, which is convenient for winding up and plugging and unplugging for charging. In the charging state, the heat exchange conductive liquid generates pressure under the action of a circulating pump, and the magnetic fluid solidifies under the action of a magnetic field generated by the current of the heat exchange conductive liquid, which can significantly improve the compression resistance of the cable and effectively avoid damage to the cable when it is in charging use.

[0017] 2. When the cable of the present invention is used for fast charging, a circulating pump is used to drive the heat exchange conductive liquid in the heat exchange tube to flow, so as to absorb the heat generated by the internal conductive copper core, and the surface heat is quickly volatilized through the outer layer of the cable made of magnetic fluid material, thereby significantly improving the heat dissipation effect of the cable body and ensuring the normal charging use of the cable under high power. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A schematic diagram of the three-dimensional cross-sectional structure of a charging pile dedicated cable proposed by the present invention Figure 1 ;

[0019] Figure 2 A schematic diagram of the three-dimensional cross-sectional structure of a charging pile dedicated cable proposed by the present invention Figure 2 ;

[0020] Figure 3 This is a schematic diagram of the three-dimensional structure of a special cable for a charging pile proposed by the present invention;

[0021] Figure 4 This is a schematic diagram of the cross-sectional structure of a special cable for charging piles proposed by the present invention.

[0022] In the figure: 1. High elastic rubber inner column; 2. Conductive copper core; 3. Inner insulation layer; 4. Metal shielding layer; 5. Braided mesh layer; 6. Heat exchange tube; 7. Heat exchange conductive liquid; 8. Magnetic fluid; 9. Inner isolation braided layer; 10. Outer isolation braided layer; 11. Isolation connection layer; 12. Wear-resistant insulation layer; 13. Circulation ring; 14. External connection ring. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0024] Example, see Figure 1-4 , a special cable for charging piles, including a cable body and a circulating pump assembly, wherein the cable body is composed of a conductive inner core body, a shielding heat exchange body and a magnetic fluid conversion hardening body from the inside to the outside;

[0025] The conductive inner core body is composed of a high elastic rubber inner column 1 located in the middle and a conductive copper core 2 distributed on the outer side wall of the high elastic rubber inner column 1. The conductive copper core 2 itself is provided with an insulating rubber material on the outside, and an inner insulating layer 3 is provided on the outside of the conductive copper core 2.

[0026] It should be noted that the highly elastic rubber inner column 1 made of highly elastic rubber material will not be damaged when under pressure, so that after being reset, the conductive copper core 2 originally located around it can be pushed outward to ensure that one side of the conductive copper core 2 is in contact with the shielded heat exchanger, thereby ensuring the heat dissipation effect of the conductive copper core 2.

[0027] The shielded heat exchanger comprises a metal shielding layer 4 arranged outside the inner insulating layer 3, and a woven mesh layer 5 is arranged on the outer side wall of the metal shielding layer 4;

[0028] The magnetic fluid conversion hardened body includes a wrapping layer and a plurality of heat exchange tubes 6 arranged in a spiral winding manner, wherein two adjacent heat exchange tubes 6 arranged in a spiral winding manner are respectively a liquid inlet pipe and a liquid outlet pipe;

[0029] The advantage of adopting the above method is that the heat exchange conductive liquid 7 in two adjacent heat exchange tubes 6 flows in opposite directions, that is, one side flows out from the circulation pump and the other side flows into the circulation pump, thereby achieving a circulation effect.

[0030] A heat exchange conductive liquid 7 is arranged inside the heat exchange tube 6, and a magnetic fluid 8 is densely arranged outside the heat exchange conductive liquid 7. The wrapping layer includes an inner isolation braided layer 9 and an outer isolation braided layer 10, and the inner isolation braided layer 9 and the outer isolation braided layer 10 are connected by a plurality of isolation connection layers 11;

[0031] It should be noted that, in order to ensure that the magnetic fluid does not move under the action of the magnetic field, the magnetic fluid 8 can be divided into multiple areas, and the magnetic fluid in each area is restricted to flow only in this area by an isolation mesh layer;

[0032] The outermost wear-resistant insulating layer 12 can limit the deformation of the magnetic fluid 8. The magnetic fluid 8 has the effect of strengthening the supporting force and becoming hard under the action of the magnetic field.

[0033] It is worth noting that the materials used for the braided mesh layer 5 and the inner isolation braided layer 9 , the outer isolation braided layer 10 and the isolation connection layer 11 are all made of metal materials, which have good thermal conductivity and can timely achieve the heat dissipation effect of the conductive copper core 2 .

[0034] Furthermore, the isolation connection layer 11 is disposed between two adjacent heat exchange tubes 6 and is disposed in a spiral shape, which can ensure that the magnetic fluid 8 flows around the heat exchange tubes 6;

[0035] It should be noted that by setting the isolation connection layer 11, it can be ensured that the material of the magnetic fluid 8 set around the heat exchange tube 6 is evenly distributed, the cable body is ensured to be in a cylindrical state, the magnetic fluid 8 under the action of magnetic force is ensured to be evenly solidified on the cable body, and the support and protection effect of the cable is ensured.

[0036] A wear-resistant insulating layer 12 is disposed outside the outer isolation braided layer 10 . The wear-resistant insulating layer 12 is a commonly used existing cable surface material, which will not be described in detail herein.

[0037] The circulating pump assembly includes a circulating pump and a circulating pump pool connected to the circulating pump. A liquid cooling device is arranged inside the circulating pump pool. The circulating pump pool is a box body for storing heat exchange conductive liquid 7. The circulating pump and its circulating pump pool are both existing technologies and will not be described in detail here. A circulating ring 13 is arranged at one end of the cable body and an external ring 14 is arranged at the other end. The circulating ring 13 is arranged at a position of the cable body close to the charging gun, and the external ring 14 is arranged at a position close to the charging pile.

[0038] It should be noted that in order to ensure that the heat exchange conductive liquid 7 in the heat exchange tube 6 has current, the input and output ends of the circulation pump can be connected with positive and negative electrodes respectively to ensure that the heat exchange conductive liquid 7 itself has current in the circulation state, so that the current of the heat exchange conductive liquid 7 generates a magnetic field, and the magnetic fluid 8 arranged on the periphery of the heat exchange tube 6 is wrapped by the magnetic field to solidify it, thereby improving the pressure resistance of the cable.

[0039] Furthermore, two external rings 14 are provided, which are respectively connected to multiple liquid inlet pipes and liquid outlet pipes. The two external rings 14 are respectively connected to the two ends of the circulation pump through connecting pipes. Multiple U-shaped connecting ports are opened inside the circulation ring 13, and the two ends of the U-shaped connecting ports are respectively connected to two adjacent liquid inlet pipes and liquid outlet pipes to achieve the effect of circulation connection.

[0040] Furthermore, the conductive copper core 2 is arranged inside the inner insulating layer 3 and is evenly distributed on the outer wall of the high-elastic rubber inner column 1. The outside of the conductive copper core 2 is evenly filled with insulating filling material, which is a rubber material with good pressure recovery effect.

[0041] It is worth noting that the circulation pump is turned on synchronously with the charging pile cable, and when the circulation pump is turned on, the heat exchange conductive liquid 7 is energized synchronously. When it is not turned on, the heat exchange conductive liquid 7 in the heat exchange tube 6 does not have the pressure generated by the circulation pump. At this time, the heat exchange tube 6 is in a soft state when under pressure, which is convenient for dragging and plugging the cable before charging.

[0042] Before the dedicated charging pile cable designed by the present invention is powered on, the charging pile cable is in a coiled state, and there is no need to improve the compression resistance of the cable. The circulating pump is in a closed state. At this time, the heat exchange conductive liquid 7 arranged in the heat exchange tube 6 has no pressure and is a "soft fluid". The magnetic fluid 8 is not subjected to the force of the magnetic field and is in a fluid state. At this time, the magnetic fluid constituting the outermost layer of the cable body is converted into a soft state. At this time, the hardness of the cable is reduced, and a large angle of bending can be achieved. When the user removes the charging gun from the charging pile and inserts it into the vehicle charging port, the operation will be more comfortable and more convenient for the user to operate;

[0043] When the charging pile supplies power to the cable for charging, the circulation pump and the positive and negative electrodes will be turned on synchronously, and the heat exchange conductive liquid 7 under the action of the circulation pump will start to circulate in the heat exchange tube 6. Under the circulation action, the heat exchange conductive liquid 7 will absorb and take away the heat generated by the conductive copper core 2, thereby cooling the cable body and ensuring the high-current charging use of the cable body. After power is turned on, the heat exchange conductive liquid 7 will generate a magnetic field due to the action of the current. Under the action of the magnetic field, the magnetic fluid 8 originally in a fluid state will solidify. The solidified magnetic fluid 8 will reinforce the outer layer of the cable body and improve the hardness of the cable. The high-pressure heat exchange conductive liquid 7 and the magnetic fluid 8 inside the spirally arranged heat exchange tube 6 will significantly improve the compressive strength of the cable under the joint action of the high-pressure heat exchange conductive liquid 7 and the magnetic fluid 8, thereby ensuring the anti-pressure and anti-damage effect of the cable during the charging process and improving the service life of the charging pile cable.

[0044] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A charging pile dedicated cable, comprising a cable body and a circulating pump assembly, characterized in that: The cable body is composed of a conductive inner core, a shielding heat exchange body and a magnetic fluid conversion hardening body from the inside to the outside. The conductive inner core body is composed of a high-elasticity rubber inner column (1) located in the middle and a conductive copper core (2) distributed on the outer side wall of the high-elasticity rubber inner column (1), and an inner insulating layer (3) is arranged outside the conductive copper core (2); The shielded heat exchanger comprises a metal shielding layer (4) arranged outside the inner insulating layer (3), and the outer side wall of the metal shielding layer (4) is provided with a woven mesh layer (5); The magnetic fluid conversion hardened body comprises a wrapping layer and a plurality of heat exchange tubes (6) arranged in a spiral winding manner, a heat exchange conductive liquid (7) is arranged inside the heat exchange tube (6), and a magnetic fluid (8) is densely arranged outside the heat exchange conductive liquid (7), the wrapping layer comprises an inner isolation braided layer (9) and an outer isolation braided layer (10), the inner isolation braided layer (9) and the outer isolation braided layer (10) are connected by a plurality of isolation connecting layers (11), and a wear-resistant insulating layer (12) is arranged outside the outer isolation braided layer (10); The circulation pump assembly comprises a circulation pump and a circulation pump pool connected to the circulation pump. A circulation ring (13) is arranged at one end of the cable body, and an external connection ring (14) is arranged at the other end.

2. A charging pile dedicated cable according to claim 1, characterized in that: The adjacent two spirally wound heat exchange tubes (6) are provided with a liquid inlet pipe and a liquid outlet pipe respectively, and a plurality of U-shaped connecting ports are provided inside the circulation ring (13), and the two ends of the U-shaped connecting ports are respectively connected to the two adjacent liquid inlet pipes and liquid outlet pipes.

3. A charging pile dedicated cable according to claim 1, characterized in that: Two external connecting rings (14) are provided, which are respectively connected to a plurality of liquid inlet pipes and liquid outlet pipes. The two external connecting rings (14) are respectively connected to two ends of the circulation pump via connecting pipes.

4. A charging pile dedicated cable according to claim 1, characterized in that: The isolation connection layer (11) is arranged between two adjacent heat exchange tubes (6) and is arranged in a spiral shape, thereby ensuring that the magnetic fluid (8) flows around the heat exchange tubes (6).

5. A charging pile dedicated cable according to claim 1, characterized in that: The conductive copper core (2) is arranged inside the inner insulating layer (3) and is evenly distributed on the outer side wall of the high-elasticity rubber inner column (1); the outside of the conductive copper core (2) is evenly filled with insulating filling material.

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