Cable and charging gun

Abstract

The embodiment of the invention discloses a cable and a charging gun, a wire penetrates through a fan made of a permanent magnet material, so that a magnetic field generated around the wire pushes the permanent magnet fan to rotate and exhaust during conductive transmission of current, heat in the cable is taken away, and the heat dissipation capability of the cable is improved. The current transmission capability of the wire in a low-temperature environment is higher than that of the wire in a high-temperature environment, so that the heat dissipation capability of the cable is improved, the temperature of the working environment of the wire in the cable can be lower, the wire can be thinner, the diameter of the cable can be reduced on the premise of meeting the large-current transmission requirement, and the cost of the cable is reduced. And the light weight of the cable is realized. Besides, according to the technical scheme of the embodiment of the invention, the fan is a passive magnetic fan, when the wire transmits current, the fan can realize passive air suction, and compared with a liquid cooling cable, the cost is lower, the fault rate is lower, and more energy is saved.

Description

Technical Field

[0001] The present invention relates to the technical field of conductive accessories, and in particular to a cable and a charging gun. Background Art

[0002] As the charging power demand of electric vehicles increases, the charging current of charging piles also increases, causing the charging cables of charging piles to become thicker and heavier, limiting the user experience and increasing the cost of the equipment.

[0003] The charging gun on the charging pile is connected to the charging pile body through a cable, so lightweighting of the cable while meeting the needs of high-power charging and heat dissipation has become an urgent problem to be solved. Summary of the invention

[0004] The present invention provides a cable and a charging gun, which can simultaneously improve the heat dissipation capacity of the cable and ensure the lightness of the cable.

[0005] According to one aspect of the present invention, there is provided a cable, comprising: at least one conductor, at least one fan and a coating layer;

[0006] Wires run through the fan, and the wires are used to carry the electrical current;

[0007] The fan includes a permanent magnetic material for rotating under the force of a magnetic field generated by an electric current;

[0008] The covering layer has a hollow cavity, and the wire and the fan are arranged in the hollow cavity.

[0009] Optionally, the distance between adjacent wires in the fan installation area is greater than the rotation radius of the fan, and the fans are staggered on different wires.

[0010] Optionally, the at least two conductors include a first conductor and a second conductor that are adjacent to each other, and in one loop, directions of currents transmitted by the first conductor and the second conductor are different;

[0011] The cable includes a first fan and a second fan, the first wire passes through the first fan, and the second wire passes through the second fan; the magnetic field generated by the first fan itself has a different direction from the magnetic field generated by the second fan itself.

[0012] Optionally, at a fan position corresponding to the second wire, a first magnetic shielding layer is provided on a side of the first wire close to the second wire;

[0013] And / or, at the fan position corresponding to the first conductive wire, a second magnetic shielding layer is provided on a side of the second conductive wire close to the first conductive wire.

[0014] Optionally, the cable includes a first sub-cable and a second sub-cable, the first sub-cable and the second sub-cable are magnetically isolated, and the at least two wires include adjacent first wires and second wires; the first wire and the fan through which the first wire passes are located in the first sub-cable, and the second wire and the fan through which the second wire passes are located in the second sub-cable; the cable includes a first fan and a second fan, the first wire passes through the first fan, and the second wire passes through the second fan;

[0015] The first conductor and the second conductor carry currents in different directions;

[0016] The direction of the magnetic field generated by the first fan itself is the same as or different from the direction of the magnetic field generated by the second fan itself.

[0017] Optionally, the fan is fixed to the wire via a rotating shaft, and the wire passes through the rotating shaft.

[0018] Optionally, the cable further includes a supporting frame, and the wires are supported in the hollow cavity by the supporting frame.

[0019] Optionally, the cable further includes an inner insulating layer, the inner insulating layer covers the conductive wire, the surface of the inner insulating layer away from the conductive wire includes a heat conductive layer, and the material of the heat conductive layer includes graphene.

[0020] Optionally, the magnet strength of the fan is determined according to a target driving magnetic field force, the target driving magnetic field force is determined according to a target air flow rate in the cable, and the target air flow rate is determined according to the heat generated by current flowing through the wire.

[0021] According to another aspect of the present invention, a charging gun is provided, comprising the cable of any embodiment of the present invention and a charging gun body, wherein the charging gun body is electrically connected to the cable.

[0022] Optionally, the charging gun body is connected to the charging pile through a cable, and the length of the cable between the fan area of ​​the cable and the charging pile is shorter than the length of the cable between the fan area of ​​the cable and the charging gun body. In this way, the fan area of ​​the cable is mainly suspended by the charging pile body, and the user does not need to add extra force to lift the fan area on the cable when lifting the gun to charge.

[0023] The cable and charging gun of the embodiment of the present invention are provided with a fan through which the wire passes through the permanent magnetic material, so that the magnetic field generated around the wire when conducting and transmitting current drives the fan to rotate and exhaust, thereby taking away the heat in the cable and improving the heat dissipation capacity of the cable. Since the ability of the wire to transmit current in a low-temperature environment is higher than that of the wire in a high-temperature environment, the heat dissipation capacity of the cable is improved, so that the temperature of the working environment of the wire in the cable can be lower, and the wire can be thinner, thereby reducing the diameter of the cable while meeting the requirements of large current transmission, thereby achieving lightweight cable. In addition, in the technical solution of the embodiment of the present invention, the fan is a passive magnetic fan. When the wire transmits current, the fan can achieve passive air suction, which has lower cost, lower failure rate, and is more energy-efficient than liquid-cooled cables.

[0024] It should be understood that the contents described in this section are not intended to identify the key or important features of the embodiments of the present invention, nor are they intended to limit the scope of the present invention. Other features of the present invention will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0026] Figure 1 is a structural schematic diagram of a cable provided by an embodiment of the present invention;

[0027] Figure 2 This is a schematic diagram of the structure of the wire passing through the fan;

[0028] Figure 3 is a schematic structural diagram of another cable provided by an embodiment of the present invention;

[0029] Figure 4 is a structural schematic diagram of another cable provided by an embodiment of the present invention;

[0030] Figure 5 It is a structural schematic diagram of a charging gun provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0031] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme 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, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0032] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0033] An embodiment of the present invention provides a cable. Figure 1 is a schematic diagram of the structure of a cable provided by an embodiment of the present invention, Figure 2 This is a schematic diagram of the structure of the wire passing through the fan, refer to Figure 1 and Figure 2 The cable includes at least one conductor 110, at least one fan 120 and a coating layer 130; the conductor 110 passes through the fan 120, and the conductor 110 is used to transmit current; the fan 120 includes a permanent magnetic material, and is used to rotate under the force of a magnetic field generated by the current; the coating layer 130 is arranged on the periphery of the conductor 110 and the fan 120, and has a hollow cavity, and the conductor 110 and the fan 120 are arranged in the hollow cavity.

[0034] The conductor 110 is made of conductive material and can transmit current. According to Ampere's law, when current passes through the conductor 110, a magnetic field similar to concentric circles is formed around the conductor 110. Specifically, the magnetic field strength H of the magnetic field formed by the current around the conductor 110 can be calculated using the following formula: ; Wherein: H is the magnetic field intensity on the concentric circle, I is the current on the conductor 110, and r is the radius of the concentric circle.

[0035] The wire 110 passes through the fan 120 made of permanent magnetic material. According to Coulomb's law, when a magnetic pole is in a magnetic field, it will generate a force of like poles repelling each other and opposite poles attracting each other. Specifically, when a magnetic pole is placed in a magnetic field, the magnetic pole will be subjected to a corresponding attraction or repulsion force, where the force on the magnetic pole can be expressed by the following formula: F=H×M; where: F is the maximum force on the magnetic pole, and M is the magnetic pole strength of the magnet. According to the above principle: a unidirectional conductive wire 110 will form a magnetic field with a stable direction around the wire 110; a permanent magnet with magnetic poles placed in the magnetic field will be subjected to the force generated by the magnetic field. In such as Figure 2 In the current direction If on the wire 110 shown, the N pole of the magnetic field generated by the current in the wire is opposite to the N pole of the magnetic field generated by the fan 120, so the fan 120 receives a repulsive force. Therefore, the magnetic field generated around the wire 110 when the current is transmitted will drive the permanent magnet fan 120 to rotate, take away the heat in the cable, and improve the heat dissipation capacity of the cable. For example, when the cable is connected to the charging gun to charge the car, the current is transmitted in the wire 110, and a magnetic field is formed around the wire 110. The magnetic field can drive the fan 120 to rotate, thereby cooling the cable and the charging pile during the charging process of the car.

[0036] The coating layer 130 is disposed on the periphery of the wire 110 and the fan 120 to protect the wire 110 and the fan 120. The coating layer 130 has a hollow cavity to ensure that there is space for the fan 120 to rotate, so that air can flow from the hollow cavity when the fan 120 rotates, thereby achieving heat dissipation. Figure 1 The exhaust wind direction W1 (i.e. Figure 1 The coating layer 130 may be made of insulating material to insulate the cable from other structures. Since the fan 120 is provided to improve the heat dissipation effect of the cable, the wire 110 may be made of a relatively low-cost material, such as copper, which can meet the requirements of current transmission and reduce costs.

[0037] The cable of this embodiment is provided with a fan through which the wire passes through the permanent magnetic material, so that the magnetic field generated around the wire when conducting and transmitting current drives the fan to rotate and exhaust, thereby taking away the heat in the cable and improving the heat dissipation capacity of the cable. Since the ability of the wire to transmit current in a low-temperature environment is higher than that in a high-temperature environment, the heat dissipation capacity of the cable is improved, so that the temperature of the working environment of the wire in the cable can be lower, so that the wire can be thinner, and then the diameter of the cable can be reduced while meeting the requirements of large current transmission, thereby achieving lightweight cable. In addition, in the technical solution of the embodiment of the present invention, the fan is a passive magnetic fan. When the wire transmits current, the fan can achieve passive air suction, which has lower cost, lower failure rate, and is more energy-efficient than liquid-cooled cables.

[0038] Figure 3 is a schematic diagram of the structure of another cable provided by an embodiment of the present invention, referring to Figure 3 Optionally, the cable includes at least two conductors, and optionally, the at least two conductors include adjacent first conductors 111 and second conductors 112, and the currents transmitted by the first conductors 111 and second conductors 112 in one loop are in different directions; the cable includes a first fan 121 and a second fan 122, and the first conductor 111 passes through the first fan 121, and the second conductor 112 passes through the second fan 122. The distance between adjacent conductors in the fan installation area is greater than the rotation radius of the fan, and the fans are staggered on different conductors.

[0039] Among them, the distance between adjacent wires in the fan installation area (that is, the fan area 101) is greater than the rotation radius of the fan, which can ensure that when the cable includes at least two wires, the fan through which the wires pass can rotate normally. The staggered arrangement of fans on different wires can refer to that the orthographic projections of fans on different wires on the side wall of the sheath 130 do not overlap. By staggering the fans on different wires, on the one hand, the problem of excessive cable thickness caused by the corresponding arrangement of fans on different wires can be avoided, so that the overall diameter of the cable is smaller; on the other hand, the staggered arrangement of fans on different wires can reduce the mutual influence between the rotation of different fans, thereby ensuring the heat dissipation efficiency. In some embodiments, the distance between adjacent wires in the area outside the fan installation area of ​​the cable may be less than or equal to the rotation radius of the fan.

[0040] In other optional embodiments of the present invention, fans with different wires may also be arranged correspondingly.

[0041] Continue to refer Figure 3 Optionally, the directions of the magnetic field generated by the first fan 121 and the magnetic field generated by the second fan 122 are different.

[0042] Among them, the first wire 111 and the second wire 112 can be arranged in parallel or non-parallel, and the first wire 111 and the second wire 112 are located in the same loop. Specifically, when the current transmission directions of the first wire 111 and the second wire 112 are different, and the directions of the magnetic fields generated by the first fan 121 and the second fan 122 themselves are the same, the directions of the forces acting on the first fan 121 and the second fan 122 are different. In some cases, the rotation directions of the first fan 121 and the second fan 122 may be opposite, so that the first fan 121 and the second fan 122 have opposite air suction directions, which is not conducive to the heat dissipation of the cable. In this embodiment, by setting the magnetic field directions of the first fan 121 and the second fan 122 themselves to be different, the first fan 121 and the second fan 122 will not rotate in opposite directions, which is conducive to the heat dissipation of the cable. Optionally, the surface magnetic poles of the blades of the first fan 121 and the second fan 122 are different. Exemplarily, the upper surface of the blade of the first fan 121 is set to be an N pole and the lower surface is an S pole; the upper surface of the blade of the second fan 122 is set to be an S pole and the lower surface is an N pole.

[0043] In some optional embodiments, the currents transmitted by the first wire 111 and the second wire 112 are in opposite directions; the magnetic fields of the first fan 121 and the second fan 122 are in opposite directions. For example, when the cable is connected to the charging gun, the first wire 111 in the cable can connect the positive pole of the power supply in the charging pile and the charging gun, and the second wire 112 in the cable can connect the negative pole of the power supply in the charging pile and the charging gun.

[0044] Specifically, when the currents transmitted by the first wire 111 and the second wire 112 are in opposite directions, the magnetic field direction of the first wire 111 itself is opposite to the magnetic field direction of the second wire 112 itself. In this case, by setting the magnetic fields generated by the first fan 121 and the second fan 122 to be in opposite directions, the directions of the forces acting on the first fan 121 and the second fan 122 can be the same, the rotation directions of the first fan 121 and the second fan 122 are the same, and the first fan 121 and the second fan 122 draw air in the same direction, which is beneficial to improving the heat dissipation efficiency.

[0045] Continue to refer Figure 3Optionally, at the position of the fan (that is, the second fan 122) corresponding to the second wire 112, a first magnetic shielding layer 141 is provided on the side of the first wire 111 close to the second wire 112. Such a configuration can reduce the influence of the force of the magnetic field generated by the current transmitted by the second wire 112 on the fan (that is, the first fan 121) through which the first wire 111 passes, thereby ensuring the heat dissipation efficiency. In some optional embodiments of the present invention, at the position of the fan (that is, the second fan 122) corresponding to the second wire 112, the first magnetic shielding layer 141 covers the first wire 111. In this way, the shielding effect of the first magnetic shielding layer 141 on the magnetic field generated by the current transmitted by the second wire 112 can be made stronger, further reducing the influence of the magnetic field generated by the current transmitted by the second wire 112 on the fan (that is, the first fan 121) of the first wire 111, which is conducive to further improving the heat dissipation efficiency.

[0046] Optionally, at the position of the fan (i.e., the first fan 121) corresponding to the first wire 111, a second magnetic shielding layer 142 is provided on the side of the second wire 112 close to the first wire 111. This arrangement can reduce the effect of the magnetic field generated by the current transmitted by the first wire 111 on the fan (i.e., the second fan 122) through which the second wire 112 passes, thereby ensuring heat dissipation efficiency. Figure 4 is a schematic diagram of the structure of another cable provided by an embodiment of the present invention, referring to Figure 4 In some optional embodiments of the present invention, at the fan position corresponding to the first wire 111 (that is, the first fan 121), the second magnetic shielding layer 142 covers the second wire 112. In this way, the second magnetic shielding layer 142 can have a stronger shielding effect on the magnetic field generated by the current transmitted by the first wire 111, further reducing the influence of the magnetic field generated by the current transmitted by the first wire 111 on the fan (that is, the second fan 122) through which the second wire 112 passes, which is conducive to further improving the heat dissipation efficiency.

[0047] In some optional embodiments of the present invention, the cable includes a first sub-cable and a second sub-cable, the first sub-cable and the second sub-cable are magnetically isolated, and the at least two conductors include an adjacent first conductor and a second conductor; the first conductor is located in the first sub-cable, and the second conductor is located in the second sub-cable; the cable includes a first fan and a second fan, the first conductor passes through the first fan, and the second conductor passes through the second fan; the current directions transmitted by the first conductor and the second conductor are different; the direction of the magnetic field generated by the first fan itself is the same as or different from the direction of the magnetic field generated by the second fan itself.

[0048] Specifically, when the first sub-cable and the second sub-cable are magnetically isolated, the magnetic field generated when the first wire transmits current will not exert force on the fan of the second wire, and the magnetic field generated when the second wire transmits current will not exert force on the fan of the first wire. The first wire and the fan through which the first wire passes are located in the first sub-cable, and the second wire and the fan through which the second wire passes are located in the second sub-cable, that is, the first wire and the corresponding fan are in a different space from the second wire and the corresponding fan. Therefore, the fan of the first wire and the fan of the second wire can achieve good heat dissipation when the rotation directions are the same or different, that is, when the two fans draw air in the same or different directions.

[0049] Continue to refer Figure 2 Optionally, the fan 120 is fixed to the wire 110 via a rotating shaft 150 , and the wire 110 passes through the rotating shaft 150 .

[0050] Specifically, the wire 110 passes directly through the fan 120, and the fan 120 has a rotating shaft 150 similar to a bearing on the wire 110. The friction of the rotating shaft 150 is very small. When the magnetic field force is greater than the friction of the bearing, the fan 120 can be driven to rotate around the rotating shaft 150, thereby generating air suction capability to discharge the hot air in the cable.

[0051] In another optional embodiment of the present invention, the center of the fan 120 includes a through hole, and the wire 110 passes through the through hole in the center of the fan, and the fan can rotate around the wire 110 in a magnetic suspension manner. In some embodiments, on both sides of the fan 120, a limiting structure can be set on the wire 110 to limit the fan 120 from rotating between the two limiting structures.

[0052] Continue to refer Figure 1 , Figure 3 and Figure 4 Optionally, the cable includes a fan area 101 and a non-fan area 102 , and the fan is located in the fan area 101 ; a cross-sectional area of ​​the fan area 101 is greater than a cross-sectional area of ​​the non-fan area 102 .

[0053] Specifically, no fan is provided in the non-fan area 102. By setting the cross-sectional area of ​​the non-fan area 102 to be smaller than the cross-sectional area of ​​the fan area 101, the cables in the area without the fan can be made thinner, further ensuring the lightweight of the cables.

[0054] Continue to refer Figure 3 and Figure 4 Optionally, the cable further includes a support frame 160 , and the wire is supported in the hollow cavity by the support frame 160 .

[0055] By providing a support frame 160, the wire is supported in the hollow cavity of the covering layer 130, so that there are gaps between the covering layer 130 and the wire, and / or between different wires, forming a cable with a hollow structure. The hollow structure can allow air to circulate when the fan rotates, so that hot air can be drawn by the fan and discharged through the hollow area, thereby achieving a heat dissipation effect.

[0056] Continue to refer Figure 1-Figure 4 Optionally, the cable further includes an inner insulating layer 170, the inner insulating layer 170 covers the wire, and the surface of the inner insulating layer 170 away from the wire includes a heat conductive layer, and the material of the heat conductive layer includes graphene.

[0057] By providing the inner insulating layer 170, different wires in the cable can be insulated from each other to avoid short circuits between different wires. By providing a heat-conducting layer on the surface of the inner insulating layer 170 away from the wire, the heat-conducting layer is generally made of a material that is easy to conduct heat, such as graphene, etc., so that the heat on the wire can be quickly introduced into the air in the hollow of the wire, and then the hot air is quickly discharged through the fan to reduce the temperature of the wire, which is conducive to improving the heat dissipation efficiency.

[0058] Optionally, the magnetic strength of the fan is determined according to a target driving magnetic field force, which is determined according to a target air flow rate in the cable, which is determined according to the heat generated by the current flowing through the wire. Specifically, when the cable structure of any of the above embodiments of the present invention is adopted, the magnetic strength of the fan can be determined according to the following method. The heat generated per unit time by the wire in the cable under different currents is calculated according to the heat calculation formula of the wire, and the heat dissipation air flow rate that maintains the normal operation of the wire is determined as the target air flow rate. Among them, the target air flow rate is the air flow rate that ensures that the heat generated by the current flowing through the wire can be at least partially discharged. Among them, the heat calculation formula generated on the wire is: , where Q is the heat generated by the wire, R is the resistance of the wire, and t is time; the larger the current, the higher the heat generated per unit time, and accordingly, the greater the target cooling air flow rate. Calculate the fan speed required for the air flow rate at different currents, and then determine the target driving magnetic field force required by the fan. According to the target driving magnetic field force, determine the strength of the magnet installed on the fan. According to the above design, the larger the current, the greater the heat generated, and the faster the fan speed dissipates heat, achieving a dynamic balance of heat dissipation and meeting the heat dissipation requirements of the entire system.

[0059] According to the improvement of the present invention, for example, in the existing heat dissipation mode, at least two 80-square copper wires (cable diameter 40 mm) are required to transmit 250A DC. The cable of the present invention is hollow inside, and a magnetic induction fan is used to draw air for heat dissipation. Two 50-square copper wires can be used to carry the cable, and the cable diameter can be reduced to 35 mm or even lower. The air-cooled heat dissipation solution of the present invention can replace the existing liquid-cooled cable solution, and effectively reduce the cable cost and achieve lightweight cable by reducing the cable diameter without reducing the current transmission capacity of the cable.

[0060] The embodiment of the present invention further provides a charging gun, Figure 5 is a schematic diagram of the structure of a charging gun provided by an embodiment of the present invention, referring to Figure 5 Optionally, the charging gun includes the cable 100 and the charging gun body 200 of any of the above embodiments of the present invention, and the charging gun body 200 is electrically connected to the cable 100.

[0061] Since the cable 100 can be lightweight, the charging gun can also be lightweight, which can reduce the force required by the user to take and put the charging gun when charging the car, thereby improving the user experience.

[0062] Based on the above embodiment, optionally, the charging gun body 200 is connected to the charging pile 300 through the cable 100, and the length of the cable 100 between the fan area 101 of the cable 100 and the charging pile 300 is less than the length of the cable 100 between the fan area 101 of the cable 100 and the charging gun body 200.

[0063] Since the fan area 101 is provided with a fan, it is heavier than a non-fan area. By setting the length of the cable 100 between the fan area 101 of the cable 100 and the charging pile 300 to be shorter than the length of the cable 100 between the fan area 101 of the cable 100 and the charging gun body 200, the cable fan area is mainly suspended by the charging pile body. When the user lifts the gun to charge, there is no need to add extra force to lift the fan area on the cable, so that the force used by the user to lift the charging gun can be further reduced, further improving the user experience. Applying the cable 100 to the charging pile 300 can extract the heat inside the charging pile 300, making the charging pile 300 more stable.

[0064] It should be understood that the various forms of processes shown above can be used to reorder, add or delete steps. For example, the steps described in the present invention can be executed in parallel, sequentially or in different orders, as long as the desired results of the technical solution of the present invention can be achieved, and this document does not limit this.

[0065] The above specific implementations do not constitute a limitation on the protection scope of the present invention. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modification, equivalent substitution and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A cable, characterized in that: include: at least one conductor, at least one fan, and a covering; The wire passes through the fan, and the wire is used to transmit current; The fan includes a permanent magnetic material for rotating under the force of the magnetic field generated by the current; The covering layer has a hollow cavity, and the conducting wire and the fan are arranged in the hollow cavity.

2. The cable according to claim 1, characterized in that: The distance between adjacent wires in the fan installation area is greater than the rotation radius of the fan, and the fans are staggeredly arranged on different wires.

3. The cable according to claim 1, characterized in that: The at least two conductors include a first conductor and a second conductor that are adjacent to each other, and the first conductor and the second conductor transmit currents in different directions in a loop; The cable includes a first fan and a second fan, the first wire passes through the first fan, and the second wire passes through the second fan; the magnetic field generated by the first fan itself and the magnetic field generated by the second fan itself have different directions.

4. The cable according to claim 3, characterized in that: At the fan position corresponding to the second wire, a first magnetic shielding layer is provided on a side of the first wire close to the second wire; And / or, at the fan position corresponding to the first wire, a second magnetic shielding layer is provided on a side of the second wire close to the first wire.

5. The cable according to claim 1, characterized in that: The invention comprises a first sub-cable and a second sub-cable, wherein the first sub-cable and the second sub-cable are magnetically isolated, and the at least two wires comprise a first wire and a second wire that are adjacent to each other; the first wire and a fan through which the first wire passes are located in the first sub-cable, and the second wire and the fan through which the second wire passes are located in the second sub-cable; The cable includes a first fan and a second fan, the first wire passes through the first fan, and the second wire passes through the second fan; The first wire and the second wire transmit currents in different directions; The direction of the magnetic field generated by the first fan itself is the same as or different from the direction of the magnetic field generated by the second fan itself.

6. The cable according to claim 1, characterized in that: The fan is fixed on the wire via a rotating shaft, and the wire passes through the rotating shaft.

7. The cable according to claim 1, characterized in that: It also includes a support frame, and the wire is supported in the hollow cavity by the support frame; and / or, The cable further comprises an inner insulating layer, the inner insulating layer covers the conductive wire, a surface of the inner insulating layer away from the conductive wire comprises a heat conductive layer, and a material of the heat conductive layer comprises graphene.

8. The cable according to claim 1, characterized in that: The magnet strength of the fan is determined according to a target driving magnetic field force, which is determined according to a target air flow rate in the cable, which is determined according to the heat generated by a current flowing through the wire.

9. A charging gun, characterized in that: It comprises the cable and charging gun body as described in any one of claims 1 to 8, and the charging gun body is electrically connected to the cable.

10. The charging gun according to claim 9, characterized in that: The charging gun body is connected to the charging pile through the cable, and the length of the cable between the fan area of ​​the cable and the charging pile is shorter than the length of the cable between the fan area of ​​the cable and the charging gun body.

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