Composite conductive member, power supply cord, and manufacturing process for composite conductive member

Abstract

The application discloses a composite conductive piece, a power line and a manufacturing process of the composite conductive piece. The composite conductive piece comprises a non-woven fabric layer, at least one wire body and a conductive layer assembly. The wire body is arranged on at least one surface of the non-woven fabric layer and extends along the length direction of the non-woven fabric layer. The conductive layer assembly covers at least one surface of the non-woven fabric layer, and the wire body is located between the conductive layer assembly and the non-woven fabric layer. The wire body is in conductive connection with the conductive layer assembly. The conductive wire in the power line is covered with the composite conductive piece. The manufacturing process comprises the following steps: arranging the wire body on at least one surface of the non-woven fabric layer along the length direction of the non-woven fabric layer; and soaking the non-woven fabric layer and the wire body in liquid conductive material to form the conductive layer assembly covering at least one surface of the non-woven fabric layer. The composite conductive piece has high toughness and conductivity, good electric leakage detection performance, safety in use, simple manufacturing process and improved production efficiency.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of cable, in particular to a composite conductive part, a power cable and a manufacturing process of the composite conductive part. BACKGROUND

[0002] In order to improve the safety level, the existing power cable is provided with a leakage detection layer on the conductive wire inside the power cable. The leakage detection layer is generally a conductive layer composed of an aluminum foil layer or a metal braid layer. The leakage detection circuit is connected with the leakage detection layer. When the conductive wire inside the power cable leaks, the leakage detection circuit detects that the leakage detection layer is electrified, and accordingly takes action.

[0003] However, the aluminum foil layer has relatively poor toughness and is easy to tear when the power cable is bent. The broken aluminum foil layer loses the leakage detection capability. The metal braid layer has relatively poor conductivity, and the manufacturing process is troublesome and the production efficiency is low. SUMMARY

[0004] The present application aims to at least solve one of the technical problems existing in the prior art. To this end, the present application provides a composite conductive part, a power cable and a manufacturing process of the composite conductive part. The composite conductive part has high toughness and conductivity, the power cable has good leakage detection performance and is safe to use, and the manufacturing process of the composite conductive part is simple and improves the production efficiency.

[0005] According to the composite conductive part of the first aspect of the present application, the composite conductive part comprises: a non-woven fabric layer; at least one wire body arranged on at least one surface of the non-woven fabric layer and extending along the length direction of the non-woven fabric layer; and a non-metallic conductive layer assembly covering at least one surface of the non-woven fabric layer and located between the wire body and the non-woven fabric layer, wherein the wire body is in conductive connection with the conductive layer assembly.

[0006] According to the composite conductive part of the present application, at least the following beneficial effects are achieved:

[0007] The non-woven fabric layer of the composite conductive part has good toughness, the non-metallic conductive layer assembly covers the non-woven fabric layer, and when the composite conductive part is bent, the non-woven fabric layer is not easy to be torn, and at the same time can provide good support for the conductive layer assembly, so that the conductive layer assembly maintains good conductivity. The wire body can also be in close contact with the conductive layer assembly, and the electric signal sensed by the conductive layer assembly can be transmitted to the outside through the wire body.

[0008] According to some embodiments of the present application, the conductive layer assembly includes a first conductive layer covering the upper surface of the non-woven fabric layer and a second conductive layer covering the lower surface of the non-woven fabric layer, and the wire body is located between the second conductive layer and the non-woven fabric layer and is in conductive connection with the second conductive layer.

[0009] According to some embodiments of the present application, the conductive layer assembly is composed of one of superconductive graphene, superconductive carbon nanometer, superconductive graphite, and superconductive carbon black.

[0010] According to the power line of the second aspect of the embodiments of the present application, at least two conductive wires are arranged therein, and the outer circumferential surface of each of the conductive wires is covered with the composite conductive member disclosed in any of the above embodiments.

[0011] According to the power line of the embodiments of the present application, at least the following beneficial effects are achieved:

[0012] In the power line of the present application, the two conductive wires can be connected to the two poles of a direct current power supply or the two phases of an alternating current power supply, respectively. The outer circumferential surface of the two conductive wires is covered with the composite conductive member. When the conductive wire is bent, the composite conductive member is not easy to be torn inside, and the conductive performance is maintained well. When the conductive wire leaks, the current will flow through the composite conductive member, and then the wire body in the composite conductive member will transmit the electric signal to the outside. The leakage detection circuit can determine whether the conductive wire leaks or not. The design has good leakage detection performance and is safe to use.

[0013] According to some embodiments of the present application, the conductive wire has two conductive wires, which are a first conductive wire and a second conductive wire, respectively, and two composite conductive members, which are a first composite conductive member and a second composite conductive member, respectively. The first conductive wire includes a first current-carrying core and a first insulating layer covering the outer circumferential surface of the first current-carrying core. The first composite conductive member covers the outer circumferential surface of the first insulating layer. The second conductive wire includes a second current-carrying core and a second insulating layer covering the outer circumferential surface of the second current-carrying core. The second composite conductive member covers the outer circumferential surface of the second insulating layer. The first composite conductive member and the second composite conductive member are in conductive connection.

[0014] According to some embodiments of the present application, a third conductive wire is further included, which includes a third current-carrying core and a third insulating layer covering the outer circumferential surface of the third current-carrying core. The first conductive wire, the second conductive wire, and the third conductive wire are arranged side by side, and the third conductive wire is located between the first conductive wire and the second conductive wire.

[0015] According to some embodiments of the present application, the outer circumferential surface of the first conductive wire is covered with a fourth insulating layer, and the first composite conductive member is located between the first insulating layer and the fourth insulating layer.

[0016] According to some embodiments of the present application, a first control line is further included, which is located in the space covered by the first insulating layer, and is in conductive connection with the wire body of the first composite conductive member.

[0017] The first control line is made of a heat-conductive material.

[0018] The manufacturing process according to the third aspect of the present application is used to manufacture the composite conductive member disclosed in any of the above embodiments, and comprises the following steps: arranging a wire body along the length direction of a non-woven fabric layer on at least one surface of the non-woven fabric layer; and immersing the non-woven fabric layer and the wire body in a liquid non-metal conductive material to form a conductive layer assembly covering the wire body on the at least one surface of the non-woven fabric layer.

[0019] The manufacturing process according to the embodiments of the present application has at least the following beneficial effects:

[0020] In the manufacturing process of the present application, the wire body is first arranged along the length direction of the non-woven fabric layer, and then the non-woven fabric layer and the wire body are immersed in a liquid non-metal conductive material. Since the non-woven fabric layer is a liquid-absorbing material, the liquid conductive material can be well attached to the surface of the non-woven fabric layer and solidified, while covering the wire body, so that the wire body is fixed on the surface of the non-woven fabric layer and is in close contact with the conductive layer assembly for conduction. The design of the manufacturing process is simple and improves the production efficiency.

[0021] Additional aspects and advantages of the present application will be made apparent by the following description and the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0022] The above and / or additional aspects and advantages of the present application will become apparent and be readily understood from the following description, taken in conjunction with the accompanying drawings, in which:

[0023] Figure 1 FIG. 1 is a structural schematic diagram of one embodiment of a composite conductive member according to the present application;

[0024] Figure 2 FIG. 2 is a cross-sectional structural schematic diagram of a power line according to a first embodiment of the present application;

[0025] Figure 3 FIG. 3 is a cross-sectional structural schematic diagram of a power line according to a second embodiment of the present application;

[0026] Figure 4 FIG. 4 is a cross-sectional structural schematic diagram of a power line according to a third embodiment of the present application;

[0027] Figure 5 FIG. 5 is a circuit schematic diagram of an electric leakage detection circuit.

[0028] Reference Signs:

[0029] Nonwoven fabric layer 110; wire body 120; conductive layer assembly 130; first conductive layer 131; second conductive layer 132; first current-carrying core 210; first insulating layer 220; first composite conductive member 230; second current-carrying core 310; second insulating layer 320; second composite conductive member 330; third current-carrying core 410; third insulating layer 420; fourth insulating layer 430; sheath layer 500; first control line 610; fifth insulating layer 620; second control line 710; sixth insulating layer 720; rectification unit 810; voltage division unit 820; relay coil 830; contact switch 840. DETAILED DESCRIPTION

[0030] Embodiments of the present application are described below in detail with reference to the accompanying drawings, wherein the same or similar components are denoted by the same or similar reference numerals throughout. The embodiments described below by reference to the accompanying drawings are exemplary and are for the purpose of explaining the present application, and should not be construed as limiting the present application.

[0031] In the description of the present application, it should be understood that, in relation to orientation description, for example, the orientation or position relationship indicated by the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is based on the orientation or position relationship shown in the drawings, and is only for the purpose of facilitating the description of the present application and simplifying the description, and therefore should not be construed as indicating or implying that the device or element indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present application.

[0032] In the description of the present application, the meaning of several is one or more, and the meaning of multiple is two or more. Greater than, less than, more than, etc. are understood as not including the number, and above, below, etc. are understood as including the number. If it is described that the first, second, etc. is only for the purpose of distinguishing technical features, and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated or the order of technical features indicated.

[0033] In the description of the present application, it should be noted that, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connecting" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0034] AsFigure 1 As shown, according to the first aspect of the present application, the composite conductive piece includes a non-woven fabric layer 110, at least one wire body 120, and a non-metallic conductive layer assembly 130, the wire body 120 is arranged on at least one surface of the non-woven fabric layer 110 and extends along the length direction of the non-woven fabric layer 110, the conductive layer assembly 130 covers at least one surface of the non-woven fabric layer 110 and the wire body 120 is located between the conductive layer assembly 130 and the non-woven fabric layer 110, and the wire body 120 is in conductive connection with the conductive layer assembly 130.

[0035] The non-woven fabric layer 110 is made of polyester fiber, polyester fiber (abbreviation: PET) material, and is made by needling process, and has good flexibility.

[0036] The wire body 120 can be a copper wire or an aluminum alloy wire, and the wire body 120 can have multiple wires. Specifically, the non-woven fabric layer 110 is generally cut into a strip shape, the wire body 120 extends along the length direction of the non-woven fabric layer 110, and multiple wire bodies 120 can be arranged in the width direction of the non-woven fabric layer 110. The control line connected to the external leakage detection circuit is easily connected to the end of the wire body 120.

[0037] In some embodiments of the present application, the conductive layer assembly 130 is composed of one of superconductive graphene, superconductive carbon nanometer, superconductive graphite, and superconductive carbon black.

[0038] The superconductive graphene, superconductive carbon nanometer, superconductive graphite, and superconductive carbon black are non-metallic superconducting materials with good conductivity, and the conductive layer assembly 130 covers the wire body 120 to be in close contact with the wire body 120 for conduction. Specifically, in production, the superconductive graphene, superconductive carbon nanometer, superconductive graphite, and superconductive carbon black are generally in the form of liquid slurry, which is soaked or coated on the surface of the non-woven fabric layer 110 and then solidified. The slurry of the superconductive graphene, superconductive carbon nanometer, superconductive graphite, and superconductive carbon black has a certain flexibility after solidification, which cooperates with the support of the non-woven fabric to make the conductive layer assembly 130 not easy to break when bending.

[0039] The composite conductive piece has good flexibility of the non-woven fabric layer 110, the non-metallic conductive layer assembly 130 covers the non-woven fabric layer 110, and when the composite conductive piece is bent, the non-woven fabric layer 110 is not easy to be torn, and at the same time, good support is provided for the conductive layer assembly 130, so that the conductive layer assembly 130 maintains good conductivity, and the wire body 120 can be in close contact with the conductive layer assembly 130, and the electric signal sensed by the conductive layer assembly 130 can be transmitted to the outside through the wire body 120.

[0040] In some embodiments of the present application, the conductive layer assembly 130 includes a first conductive layer 131 covering the upper surface of the non-woven fabric layer 110 and a second conductive layer 132 covering the lower surface of the non-woven fabric layer 110, and the wire body 120 is located between the second conductive layer 132 and the non-woven fabric layer 110 and is in conductive connection with the second conductive layer 132.

[0041] Generally, the wire body 120 is arranged on one surface of the non-woven fabric layer 110, the first conductive layer 131 covers the upper surface of the non-woven fabric layer 110, and the second conductive layer 132 covers the lower surface of the non-woven fabric layer 110, which can increase the strength of the composite conductive member as a whole, and since the composite conductive member can be applied to form a shielding layer or a leakage detection layer of a power line, the shielding ability of the shielding layer to electromagnetic interference signals can be improved, and the accuracy of leakage detection can also be improved.

[0042] According to the second aspect of the present application, the power line is provided with at least two conductive wires, and the outer circumferential surface of each conductive wire is partially or entirely covered with the composite conductive member disclosed in any of the above embodiments. Figures 2-4 As shown in the figure, the power line is provided with at least two conductive wires, and the outer circumferential surface of each conductive wire is partially or entirely covered with the composite conductive member disclosed in any of the above embodiments.

[0043] In some embodiments of the present application, the composite conductive member can be in the form of a strip, and the composite conductive member is spirally wound on the outer circumferential surface of the conductive wire.

[0044] In the embodiments in which the wire body 120 is arranged on only one surface of the non-woven fabric layer 110, the conductive body can be located on the side of the non-woven fabric layer 110 close to the conductive wire or on the side of the non-woven fabric layer 110 away from the conductive wire.

[0045] In the embodiments in which the wire body 120 is arranged on only one surface of the non-woven fabric layer 110, the conductive body can be located on the side of the non-woven fabric layer 110 close to the conductive wire or on the side of the non-woven fabric layer 110 away from the conductive wire.

[0046] In some embodiments of the present application, the power line is provided with at least two conductive wires, and the outer circumferential surface of each conductive wire is partially or entirely covered with the composite conductive member disclosed in any of the above embodiments. Figures 2-4As shown, the conductive wires are two and are respectively a first conductive wire and a second conductive wire, the two composite conductive pieces are respectively a first composite conductive piece 230 and a second composite conductive piece 330, the first conductive wire comprises a first current-carrying core 210 and a first insulating layer 220 wrapped on the outer circumferential surface of the first current-carrying core 210, the first composite conductive piece 230 is wrapped on the outer circumferential surface of the first insulating layer 220, the second conductive wire comprises a second current-carrying core 310 and a second insulating layer 320 wrapped on the outer circumferential surface of the second current-carrying core 310, the second composite conductive piece 330 is wrapped on the outer circumferential surface of the second insulating layer 320, and the first composite conductive piece 230 and the second composite conductive piece 330 are conductively connected.

[0047] The first current-carrying core 210 can be connected with an L phase of an alternating current power supply, the second current-carrying core 310 can be connected with an N phase of the alternating current power supply, the first composite conductive piece 230 can play a shielding role for power transmission of the first current-carrying core 210, the second composite conductive piece 330 can play a shielding role for power transmission of the second current-carrying core 310, and meanwhile, when power transmission of the first current-carrying core 210 leaks to the outside, current will pass through the conductive layer assembly 130 of the first composite conductive piece 230 after breaking through the first insulating layer 220, and then is transmitted to a leakage detection circuit in the outside through the wire body 120, and similarly, when power transmission of the second current-carrying core 310 leaks to the outside, current will pass through the conductive layer assembly 130 of the second composite conductive piece 330 after breaking through the second insulating layer 320, and then is transmitted to the leakage detection circuit in the outside through the wire body 120.

[0048] The first current-carrying core 210 and the second current-carrying core 310 can be twisted by conductive filaments composed of copper, aluminum or alloy.

[0049] In some embodiments of the present application, the first insulating layer 220 and the second insulating layer 320 can be composed of plastic, rubber or irradiated ethylene-propylene material, specifically, the plastic can be PVC material, the rubber can be CPE synthetic rubber material, and the irradiated ethylene-propylene material can be terpolymer, wherein the irradiated ethylene-propylene material has better insulation performance and waterproof performance than traditional irradiated chlorinated polyethylene insulation material.

[0050] It should be noted that the power line further comprises a sheath layer 500, the sheath layer 500 wraps the conductive wires inside, and a filler can be arranged between the plurality of conductive wires and the inner wall of the sheath layer 500, specifically, the filler can be aramid.

[0051] The sheath layer 500 can be made of plastic, rubber or irradiated ethylene vinyl acetate material (EVM). Specifically, the plastic can be PVC material, the rubber can be CPE synthetic rubber material, and the irradiated ethylene vinyl acetate material (EVM) can be ethylene vinyl acetate rubber. The irradiated ethylene vinyl acetate material (EVM) is a low-smoke halogen-free material, which has better flame retardant performance and environmental protection performance compared with traditional irradiated chlorinated polyethylene insulation material.

[0052] The material selection of the sheath layer 500 and the first and second insulation layers 220 and 320 can have various embodiments, for example:

[0053] The first and second insulation layers 220 and 320 are irradiated ethylene-propylene material, and the sheath layer 500 is plastic or rubber material.

[0054] The first and second insulation layers 220 and 320 are plastic or rubber material, and the sheath layer 500 is irradiated ethylene vinyl acetate material (EVM).

[0055] The first and second insulation layers 220 and 320 are irradiated ethylene-propylene material, and the sheath layer 500 is irradiated ethylene vinyl acetate material (EVM).

[0056] In some embodiments of the present application, as shown in Figure 2 , 3 The outer circumferential surface of the first conductive wire is covered with a fourth insulation layer 430, and the first composite conductive member 230 is located between the first insulation layer 220 and the fourth insulation layer 430.

[0057] Since the surfaces of the first and second composite conductive members 230 and 330 are conductive, the first and second conductive wires are located in the sheath layer 500, and there is a possibility of mutual contact between the first and second composite conductive members 230 and 330 for conduction. Therefore, the fourth insulation layer 430 is wrapped on the first composite conductive member 230, and the fourth insulation layer 430 can insulate and isolate the first and second composite conductive members 230 and 330, so that the leakage detection is more stable and accurate.

[0058] In some embodiments of the present application, as shown in Figure 2 , 3 , 4, a third conductive wire is further included, and the third conductive wire includes a third current-carrying core 410 and a third insulation layer 420 wrapped on the outer circumferential surface of the third current-carrying core 410.

[0059] The third current-carrying core 410 can be connected with the ground wire in the alternating current power supply, so that the power supply line is more stable and safe for power transmission. Similarly, the third conductive wire is also wrapped in the sheath layer 500.

[0060] Specifically, the third current-carrying core 410 can also be twisted by conductive wires made of metal or alloy such as copper, aluminum, etc., and the third insulating layer 420 can be made of the same material as the first insulating layer 220 and the second insulating layer 320, such as plastic, rubber, or irradiated ethylene-propylene material, etc.

[0061] In some embodiments of the present application, as shown in Figure 4 The first conductive wire, the second conductive wire, and the third conductive wire are arranged side by side, and the third conductive wire is located between the first conductive wire and the second conductive wire. The first composite conductive part 230 on the first conductive wire and the second composite conductive part 330 on the second conductive wire are isolated by the third insulating layer 420 of the third conductive wire. Since the first conductive wire, the second conductive wire, and the third conductive wire are arranged side by side, the first composite conductive part 230 and the second composite conductive part 330 are not easy to contact, so there is no need to coat the fourth insulating layer 430 on the first composite conductive part 230 or the second composite conductive part 330, thereby saving costs.

[0062] In some embodiments of the present application, a first control wire 610 is also included, and the first control wire 610 is located in the space coated by the first insulating layer 220 and is in conductive connection with the wire body 120 of the first composite conductive part 230.

[0063] The first control wire 610 is used to be connected with the leakage detection circuit of the external environment, so that the leakage detection circuit can obtain the electrical signal transmitted by the wire body 120, which can represent whether there is leakage. It can be understood that the outer surface of the first control wire 610 is coated with a fifth insulating layer 620. Since the internal space of the first current-carrying core 210 is a certain gap, the first control wire 610 is located in the space coated by the first insulating layer 220, which can make the internal structure of the first conductive wire more compact. Compared with arranging the first control wire 610 outside the first insulating layer 220, it does not occupy the external space, and at the same time, it will not collide with other components such as the second conductive wire and the third conductive wire during the movement or bending of the power line, thereby reducing the probability of wear and tear.

[0064] Similarly, a second control wire 710 can also be included, and the second control wire 710 is located in the space coated by the second insulating layer 320 and is in conductive connection with the wire body 120 of the second composite conductive part 330.

[0065] The second control line 710 is used to be connected with the leakage detection circuit in the outside world, so that the leakage detection circuit obtains the electrical signal transmitted by the conductor body 120, which can represent whether there is leakage. It can be understood that the outer surface of the second control line 710 is covered with the sixth insulation layer 720. Since the second current-carrying core 310 is internally provided with a certain gap space, the second control line 710 is located in the space covered by the second insulation layer 320, so that the internal structure of the second conductive line is more compact. Compared with arranging the second control line 710 outside the second insulation layer 320, no external space is occupied, and during movement or bending of the power line, no collision with other components such as the first conductive line and the third conductive line occurs, thereby reducing the probability of wear and tear.

[0066] Specifically, the first control line 610 and the second control line 710 are both made of heat-conducting materials. The first control line 610 and the second control line 710 respectively conduct the heat of the first current-carrying core 210 and the second current-carrying core 310. The outside world can collect the temperature on the first control line 610 and the second control line 710 through a temperature detection component to determine the temperature of the first current-carrying core 210 and the second current-carrying core 310. When the temperature is abnormal, reasonable measures such as stopping power supply can be taken to improve the safety level.

[0067] The leakage detection circuit can have various embodiments, for example, as shown in Figure 5 The leakage detection circuit includes a rectifier unit 810, a voltage dividing unit 820, a photoelectric coupler U1, a silicon-controlled Q1, and a relay. The relay includes a relay coil 830 and a contact switch 840 that can be actuated by the relay coil 830. The contact switch 840 includes a first switch and a second switch. For example, the first current-carrying core 210 can be connected with the L phase of the alternating current power supply, and the second current-carrying core 310 can be connected with the N phase of the alternating current power supply. The first switch is arranged on the first current-carrying core 210 to control the on-off of the first current-carrying core 210, and the second switch is arranged on the second current-carrying core 310 to control the on-off of the second current-carrying core 310.

[0068] The voltage dividing unit 820 includes a resistor R6 and a resistor R7. One end of the resistor R6 is electrically connected with the second current-carrying core 310, one end of the resistor R7 is electrically connected with the first current-carrying core 210, and the other end of the resistor R6 is electrically connected with the other end of the resistor R7 and one phase of the alternating current input end of the rectifier unit 810.

[0069] It should be noted that the first composite conductive member 230 wrapped around the outer circumferential surface of the first insulating layer 220 and the second composite conductive member 330 wrapped around the outer circumferential surface of the second insulating layer 320 have a certain length, one end of the first composite conductive member 230 is electrically connected with one end of the second composite conductive member 330, and the other phase of the AC input end of the rectifier unit 810 is respectively electrically connected with the other end of the first composite conductive member 230 and the other end of the second composite conductive member 330.

[0070] One pole of the DC output end of the rectifier unit 810 is connected with the anode of the light emitter of the photoelectric coupler U1, the other pole of the DC output end of the rectifier unit 810 is connected with the cathode of the light emitter of the photoelectric coupler U1, the positive pole of the light receiver of the photoelectric coupler U1 is respectively connected with one end of the relay coil 830 and the input pole of the thyristor Q1 through the resistor R1, the negative pole of the light receiver of the photoelectric coupler U1 is connected with the controlled pole of the thyristor Q1, and the negative pole of the light receiver of the photoelectric coupler U1 is connected with the second current-carrying core 310 through the resistor R2, the other end of the relay coil 830 is connected with the negative pole of the diode D1, the positive pole of the diode D1 is connected with the first current-carrying core 210, and the output end of the thyristor Q1 is connected with the second current-carrying core 310.

[0071] Specifically, the rectifier unit 810 is selected in a conventional full-bridge rectification structure or a half-bridge rectification structure.

[0072] When leakage occurs in any one of the first conductive wire or the second conductive wire, the first current-carrying core 210 is electrically connected with the first composite conductive member 230, or the second current-carrying core 310 is electrically connected with the second composite conductive member 330, the thyristor Q1 is turned on, so that the relay coil 830 can control the contact switch 840 to be disconnected.

[0073] In the above leakage detection circuit structure, even if line breakage occurs in the inside of any one of the first composite conductive member 230 and the second composite conductive member 330, the leakage signal can be fed back from the other one of the first composite conductive member 230 and the second composite conductive member 330 to the other phase of the AC input end of the rectifier unit 810, so as to trigger the contact switch 840 to be disconnected.

[0074] The manufacturing process according to the third aspect of the present application is used for manufacturing the composite conductive member disclosed in any one of the above embodiments, and includes the following steps: arranging the wire body 120 along the length direction of the non-woven fabric layer 110 on at least one surface of the non-woven fabric layer 110; and immersing the non-woven fabric layer 110 and the wire body 120 in a liquid non-metal conductive material to form the conductive layer assembly 130 covering at least one surface of the non-woven fabric layer 110.

[0075] The non-metallic conductive material can be one of superconductive graphene, superconductive carbon nanometer, superconductive graphite and superconductive carbon black, can form a liquid slurry, and has a lower temperature than the liquid state of the metallic conductive material, and will not damage the non-woven fabric layer 110.

[0076] In the manufacturing process, the wire body 120 is arranged along the length direction of the non-woven fabric layer 110, and then the non-woven fabric layer 110 and the wire body 120 are soaked in the liquid non-metallic conductive material. Since the non-woven fabric layer 110 is a liquid absorbing material, the liquid conductive material can be well attached to the surface of the non-woven fabric layer 110 and solidified, and at the same time, coated on the wire body 120, so that the wire body 120 is fixed on the surface of the non-woven fabric, and the wire body 120 is in close contact with the conductive layer assembly 130 for conduction. The design manufacturing process is simple, and the production efficiency is improved.

[0077] The technical features of the above-described embodiments can be combined arbitrarily, and for the sake of brevity, all possible combinations of the technical features in the above-described embodiments are not described, but as long as the combinations of the technical features do not exist, they should be considered as the scope of the present disclosure.

[0078] Although the embodiments of the present application have been shown and described, those skilled in the art can understand that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the claims and their equivalents.

Claims

1. A power cord, characterized by, The composite conductive member is coated on the outer circumferential surface of at least one of the conductive wires. The composite conductive member comprises: The non-woven fabric layer; The at least one conductive wire body is arranged on at least one surface of the non-woven fabric layer and extends along the length direction of the non-woven fabric layer; The non-metallic conductive layer assembly is arranged on at least one surface of the non-woven fabric layer, and the conductive wire body is arranged between the conductive layer assembly and the non-woven fabric layer, and the conductive wire body is in conductive connection with the conductive layer assembly; The conductive layer assembly comprises a first conductive layer and a second conductive layer, the first conductive layer is arranged on the upper surface of the non-woven fabric layer, the second conductive layer is arranged on the lower surface of the non-woven fabric layer, and the conductive wire body is arranged between the second conductive layer and the non-woven fabric layer and is in conductive connection with the second conductive layer; The conductive wire has two conductive wires, namely a first conductive wire and a second conductive wire, and the two composite conductive members are a first composite conductive member and a second composite conductive member, the first conductive wire comprises a first current-carrying core and a first insulating layer coated on the outer circumferential surface of the first current-carrying core, the first composite conductive member is coated on the outer circumferential surface of the first insulating layer, the second conductive wire comprises a second current-carrying core and a second insulating layer coated on the outer circumferential surface of the second current-carrying core, and the second composite conductive member is coated on the outer circumferential surface of the second insulating layer, and the first composite conductive member and the second composite conductive member are in conductive connection.

2. A power cord according to claim 1, wherein: The conductive layer assembly is composed of one of conductive graphene, conductive graphite and conductive carbon black.

3. The power cord of claim 1, wherein: The third conductive wire comprises a third current-carrying core and a third insulating layer coated on the outer circumferential surface of the third current-carrying core, the first conductive wire, the second conductive wire and the third conductive wire are arranged side by side, and the third conductive wire is arranged between the first conductive wire and the second conductive wire.

4. The power cord of claim 1, wherein: The outer circumferential surface of the first conductive wire is coated with a fourth insulating layer, and the first composite conductive member is arranged between the first insulating layer and the fourth insulating layer.

5. The power cord of claim 1, wherein: The first control wire is arranged in the space coated by the first insulating layer, and the first control wire is in conductive connection with the conductive wire body of the first composite conductive member.

6. A power cord according to claim 5, wherein: The first control wire is composed of a heat-conducting material.

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