A high-stability photovoltaic cable

Abstract

The present invention relates to the field of cable technology, specifically a high-stability photovoltaic cable. It solves the problem that existing photovoltaic cables, when transmitting photovoltaic-generated electricity, are usually laid in outdoor environments and are easily damaged by the external environment and animals, which affects their service life and makes it difficult to determine the damaged location of the photovoltaic cable. The photovoltaic cable comprises a protective monitoring unit, the protective monitoring unit comprising a thermal insulation layer, a polyvinyl chloride layer is installed on the outer side of the thermal insulation layer, an inner shielding layer is provided on the outer surface of the thermal insulation layer, an outer shielding layer is provided on the inner wall of the polyvinyl chloride layer, a covering interlayer is installed between the outer shielding layer and the inner shielding layer, a damage monitoring circuit is fixedly provided inside the covering interlayer, and the damage monitoring circuit includes an insulating sleeve. By incorporating a damage monitoring circuit into the photovoltaic cable, the present invention can realize damage monitoring of the photovoltaic cable when it is used outdoors, facilitating rapid and accurate determination of the damaged location.

Description

Technical Field

[0001] The present invention relates to the technical field of cables, in particular to a high-stability photovoltaic cable. Background Art

[0002] Photovoltaic cables are a crucial and indispensable component of solar photovoltaic power generation systems. Typically, the low-voltage DC power generated by photovoltaic power generation is converted to AC power for output, and the cables connecting photovoltaic panels and AC / DC inverters are photovoltaic cables. Therefore, as the backbone of power transmission in photovoltaic power generation facilities, photovoltaic cables are directly related to the safety, reliability, and advancement of solar photovoltaic power generation systems. Since most photovoltaic power stations are built outdoors, cables must exhibit excellent flame retardancy, oil resistance, sunlight aging resistance, acid and alkali resistance, ozone resistance, high temperature and cold resistance, and be halogen-free.

[0003] When existing photovoltaic cables transmit photovoltaic-generated electricity, they are usually laid in outdoor environments and are easily damaged by the external environment and animals, which affects their service life. It is also inconvenient to determine the damaged location of the photovoltaic cable. Therefore, it does not meet existing needs. In this regard, we have proposed a high-stability photovoltaic cable. Summary of the Invention

[0004] The purpose of the present invention is to provide a high-stability photovoltaic cable to solve the problem raised in the above background technology that when existing photovoltaic cables are used to transmit photovoltaic-generated electricity, the photovoltaic cables are usually laid in outdoor environments, are easily damaged by the external environment and animals, and their service life is affected, and it is inconvenient to determine the damaged location of the photovoltaic cables.

[0005] To achieve the above objectives, the present invention provides the following technical solutions: a high-stability photovoltaic cable, comprising a protection and monitoring unit, the protection and monitoring unit comprising a thermal insulation layer, a polyvinyl chloride layer installed on the outer side of the thermal insulation layer, an inner shielding layer provided on the outer surface of the thermal insulation layer, an outer shielding layer provided on the inner wall of the polyvinyl chloride layer, a covering interlayer installed between the outer shielding layer and the inner shielding layer, a damage monitoring circuit fixedly provided inside the covering interlayer, the damage monitoring circuit comprising an insulating sleeve, a two-core cable fixedly installed inside the insulating sleeve, and a plurality of dual-resistance connecting rings installed on one side of the two-core cable;

[0006] The dual-resistance connecting ring consists of a monitoring module and two resistance rings, which are installed symmetrically relative to the monitoring module. The monitoring module includes a current sensor, and power-connecting metal strips are installed on both sides of the current sensor. A conical connector is fixed on the side of the current sensor close to the dual-core cable.

[0007] Preferably, the resistance ring further includes a monitoring box connected to the outer side of the current sensor, and a sealing cover is installed on the upper end of the monitoring box.

[0008] Preferably, the polyvinyl chloride layer and the outer shielding layer, and the thermal insulation layer and the inner shielding layer are all bonded and fixed, and a nylon braided layer is provided inside the polyvinyl chloride layer. The nylon braided layer is woven from a plurality of nylon threads, and the plurality of nylon threads are divided into warp threads and weft threads.

[0009] Preferably, multiple dual-resistance connecting rings are arranged linearly along the axis of the sheathed interlayer, and multiple monitoring modules are arranged spirally along the axis of the dual-core cable. The dual-core cable is composed of an optical fiber and a low-voltage cable. The insulating sleeve is covered on the outside of the optical fiber and the low-voltage cable, and the optical fiber and the low-voltage cable are fixedly connected to the sheathed interlayer through the insulating sleeve.

[0010] Preferably, the current sensor is fixedly connected to the monitoring box, and both sides of the current sensor are fixedly connected to two adjacent power-connecting metal strips, and the two power-connecting metal strips are symmetrically installed relative to the current sensor.

[0011] Preferably, one end of the power-connected metal belt passes through the monitoring box and is fixedly connected to the resistance ring, and the two adjacent resistance rings are electrically connected to the current sensor through the power-connected metal belt, and the current sensor and the two resistance rings are in series. The surface of the coating interlayer is provided with a plurality of annular grooves, and the resistance ring is arranged on the inner side of the annular groove and is fixedly connected to the coating interlayer.

[0012] Preferably, the coating interlayer is fixedly connected to a plurality of monitoring boxes, the monitoring box is fixedly connected to the sealing cover, the current sensor is arranged between the monitoring box and the sealing cover, and the current sensor passes through the monitoring box and the insulating sleeve through one end of the conical connector and is connected to the optical fiber and the low-voltage cable.

[0013] Preferably, a central support wire is installed inside the protection monitoring unit, a power transmission unit is installed between the protection monitoring unit and the central support wire, the power transmission unit includes an insulating filling layer, a plurality of battery core assemblies are installed inside the insulating filling layer, two aluminum foil layers are installed between each two adjacent battery core assemblies, a metal wire is slidably connected inside the aluminum foil layer, the battery core assembly includes a tin foil layer, a copper core is installed inside the tin foil layer, and a cross-linked polyethylene layer is installed between the tin foil layer and the copper core.

[0014] Preferably, the insulating filling layer is fixedly connected to multiple tin foil layers and aluminum foil layers, the insulating filling layer is slidingly connected to multiple metal wires through the aluminum foil layer, the multiple metal wires and battery core components are arranged circumferentially relative to the axis of the insulating filling layer, the copper core and the tin foil layer are fixedly connected through the cross-linked polyethylene layer, and the aluminum foil layer and the tin foil layer are both spiral.

[0015] Preferably, the thermal insulation layer is fixedly connected to the central support wire via an insulating filling layer, and the central support wire is composed of a plurality of galvanized wires, which are connected in a spiral winding manner.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. The present invention facilitates maintaining the bending and compressive strength of the photovoltaic cable through a central support wire and multiple metal wires arranged in a circumferential manner. The multiple metal wires are slidably connected to the insulating filling layer through an aluminum foil layer. When the photovoltaic cable is compressed and bent, the metal wires are in a sliding state relative to the aluminum foil layer, which can prevent cracks from forming within the insulating filling layer. The tin foil layer and cross-linked polyethylene layer can effectively install and protect the copper core. The polyvinyl chloride layer and the thermal insulation layer can effectively shield and protect the damage monitoring circuit through the outer shielding layer and the inner shielding layer, maintaining the stable operation of the damage monitoring circuit.

[0018] 2. The present invention connects two resistance rings to electricity through a conical connector, a current sensor, and two power-connecting metal strips under the sheathing effect of a dual-core cable in an insulating sleeve, thereby achieving synchronous power connection operation of multiple dual-resistance power-connecting rings with the dual-core cable. The current sensor monitors the power connection of the resistance rings through the two power-connecting metal strips. The current sensor and the two resistance rings are connected in series. The current sensor measures the resistance ring with a changed resistance value and transmits the signal through the conical connector and the optical fiber, thereby being able to quickly and accurately determine the damaged part of the photovoltaic cable, reducing the difficulty of inspection and maintenance and improving the stability of the photovoltaic cable.

[0019] 3. The present invention arranges multiple monitoring modules in a spiral shape along the axis of the dual-core cable to avoid the situation where multiple monitoring modules are on the same straight line and are damaged synchronously. At the same time, multiple linearly arranged dual-resistance connecting rings can evenly monitor and cover the photovoltaic cable, thereby improving the accuracy of monitoring damaged photovoltaic cables. The dual-core cable is located inside multiple dual-resistance connecting rings, so that the dual-core cable can be monitored and isolated through multiple dual-resistance connecting rings. When the photovoltaic cable is damaged, the dual-resistance connecting rings can be damaged before the dual-core cable, thereby determining the damaged position of the photovoltaic cable before the damage monitoring circuit is powered off. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 Schematic diagram of the structure of the photovoltaic cable of the present invention;

[0021] Figure 2 Schematic diagram of the cross-sectional structure of the photovoltaic cable of the present invention;

[0022] Figure 3 A schematic diagram of the partial structure of the power transmission unit of the present invention;

[0023] Figure 4It is a partial structural diagram of the protection monitoring unit of the present invention;

[0024] Figure 5 For the present invention Figure 4 Schematic diagram of the cross-sectional structure of area A in the middle;

[0025] Figure 6 This is a schematic diagram of the installation structure of the double-resistor electric ring of the present invention;

[0026] Figure 7 Schematic diagram of the installation structure of the resistance ring of the present invention;

[0027] Figure 8 Schematic diagram of the installation structure of the monitoring module of the present invention;

[0028] Figure 9 Schematic diagram of the structure of the monitoring module of the present invention;

[0029] Figure 10 This is a schematic diagram of the explosion structure of the monitoring module of the present invention;

[0030] Figure 11 Schematic diagram of the structure of the damage monitoring circuit of the present invention.

[0031] In the figure: 1. Protection monitoring unit; 101. Polyvinyl chloride layer; 102. Insulation layer; 103. Insulation sleeve; 104. Dual-core cable; 105. Coating interlayer; 106. Outer shielding layer; 107. Inner shielding layer; 108. Monitoring module; 109. Dual-resistance connecting ring; 110. Resistance ring; 111. Monitoring box; 112. Conical connector; 113. Connecting metal belt; 114. Current sensor; 115. Sealing cover; 116. Damage monitoring circuit; 2. Transmission unit; 201. Insulation filling layer; 202. Battery core assembly; 203. Aluminum foil layer; 204. Metal wire; 205. Tin foil layer; 206. Cross-linked polyethylene layer; 207. Copper core; 3. Center support wire. DETAILED DESCRIPTION

[0032] 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.

[0033] See also Figures 2 to 5The present invention provides an embodiment of a high-stability photovoltaic cable, comprising a protection monitoring unit 1, the protection monitoring unit 1 comprising a thermal insulation layer 102, a polyvinyl chloride layer 101 installed on the outside of the thermal insulation layer 102, an inner shielding layer 107 provided on the outer surface of the thermal insulation layer 102, an outer shielding layer 106 provided on the inner wall of the polyvinyl chloride layer 101, the polyvinyl chloride layer 101 and the outer shielding layer 106 and the thermal insulation layer 102 and the inner shielding layer 107 are all bonded and fixed, and the inner surface of the polyvinyl chloride layer 101 is provided with a plurality of protective layers. A nylon braided layer is provided, which is composed of multiple nylon threads woven together. The multiple nylon threads are divided into warp and weft threads. A covering interlayer 105 is installed between the outer shielding layer 106 and the inner shielding layer 107. A damage monitoring circuit 116 is fixedly installed inside the covering interlayer 105. The polyvinyl chloride layer 101 and the thermal insulation layer 102 can effectively shield and protect the damage monitoring circuit 116 through the outer shielding layer 106 and the inner shielding layer 107, thereby maintaining stable operation of the damage monitoring circuit 116.

[0034] The damage monitoring circuit 116 includes an insulating sleeve 103, a dual-core cable 104 is fixedly installed inside the insulating sleeve 103, and multiple dual-resistance connecting rings 109 are installed on one side of the dual-core cable 104. The dual-core cable 104 is composed of optical fiber and low-voltage cable. The insulating sleeve 103 is covered on the outside of the optical fiber and low-voltage cable. The optical fiber and low-voltage cable are fixedly connected to the covering interlayer 105 through the insulating sleeve 103. The multiple dual-resistance connecting rings 109 can be powered synchronously through the low-voltage cable and the status signals of the dual-resistance connecting rings 109 can be transmitted through the optical fiber.

[0035] See also Figures 5 to 7 , multiple double-resistance connecting rings 109 are arranged linearly along the axis of the sheathing interlayer 105, and the double-resistance connecting ring 109 is composed of a monitoring module 108 and two resistance rings 110. Multiple monitoring modules 108 are arranged spirally along the axis of the dual-core cable 104, and the two resistance rings 110 are installed symmetrically with respect to the monitoring module 108. The surface of the sheathing interlayer 105 is provided with multiple annular grooves, and the resistance ring 110 is arranged on the inner side of the annular groove and fixedly connected to the sheathing interlayer 105. The sheathing interlayer 105 protects and shapes the dual-core cable 104 through the insulating sleeve 103 to keep the spiral-shaped dual-core cable 104 stable in use.

[0036] See also Figures 8 to 11The monitoring module 108 includes a current sensor 114, which is connected in series with the two resistance rings 110. Power-connecting metal strips 113 are installed on both sides of the current sensor 114. The two adjacent resistance rings 110 and the current sensor 114 are electrically connected through the power-connecting metal strips 113. A conical connector 112 is fixedly provided on the side of the current sensor 114 close to the dual-core cable 104. A monitoring box 111 is installed on the outside of the current sensor 114. The covering interlayer 105 is fixedly connected to the multiple monitoring boxes 111. One end of the power-connecting metal strip 113 passes through the monitoring box 111 and is fixedly connected to the resistance ring 110. The current sensor 114 monitors the power connection of the resistance ring 110 through the two power-connecting metal strips 113 inside the monitoring box 111 and the sealing cover 115.

[0037] The current sensor 114 is fixedly connected to the monitoring box 111, and both sides of the current sensor 114 are fixedly connected to two adjacent power-connecting metal strips 113. The two power-connecting metal strips 113 are symmetrically installed relative to the current sensor 114. The current sensor 114 passes through the monitoring box 111 and the insulating sleeve 103 through one end of the conical connector 112 and is connected to the optical fiber and the low-voltage cable. A sealing cover 115 is installed on the upper end of the monitoring box 111. The monitoring box 111 is fixedly connected to the sealing cover 115. The current sensor 114 is arranged between the monitoring box 111 and the sealing cover 115. The current sensor 114 measures the resistance ring 110 whose resistance value changes and transmits the signal through the conical connector 112 and the optical fiber, thereby being able to quickly and accurately determine the damaged part of the photovoltaic cable.

[0038] See also Figures 1 to 3 A central support wire 3 is installed inside the protection and monitoring unit 1, and a power transmission unit 2 is installed between the protection and monitoring unit 1 and the central support wire 3. The power transmission unit 2 includes an insulating filling layer 201, and the thermal insulation layer 102 is fixedly connected to the central support wire 3 through the insulating filling layer 201. The central support wire 3 is composed of a plurality of galvanized wires, and the plurality of galvanized wires are spirally wound and connected. A plurality of battery core assemblies 202 are installed inside the insulating filling layer 201, and two aluminum foil layers 203 are installed between each two adjacent battery core assemblies 202. The central support wire 3 and a plurality of metal wires 204 arranged in a circumference facilitate maintaining the bending and compressive strength of the photovoltaic cable.

[0039] The aluminum foil layer 203 is slidably connected to a metal wire 204, the insulating filling layer 201 and the multiple metal wires 204 are slidably connected through the aluminum foil layer 203, the multiple metal wires 204 and the battery core assembly 202 are arranged in a circle relative to the axis of the insulating filling layer 201, the battery core assembly 202 includes a tinfoil layer 205, the insulating filling layer 201 and the multiple tinfoil layers 205 and the aluminum foil layer 203 are fixedly connected, a copper core 207 is installed inside the tinfoil layer 205, a cross-linked polyethylene layer 206 is installed between the tinfoil layer 205 and the copper core 207, the copper core 207 and the tinfoil layer 205 are fixedly connected through the cross-linked polyethylene layer 206, the aluminum foil layer 203 and the tinfoil layer 205 are both spiral, and when the photovoltaic cable is compressed and bent, the metal wire 204 is in a sliding state relative to the aluminum foil layer 203, which can prevent cracks from occurring inside the insulating filling layer 201.

[0040] In summary, the photovoltaic cable is assembled in sequence from the outside to the inside through the protection and monitoring unit 1, the transmission unit 2 and the central support wire 3. When the photovoltaic cable transmits electricity for photovoltaic power generation, a metal wire 204 is installed between each two adjacent battery core assemblies 202. The central support wire 3 and the multiple metal wires 204 arranged in a circle facilitate maintaining the bending and compressive strength of the photovoltaic cable. The multiple metal wires 204 are slidably connected to the insulating filling layer 201 through the aluminum foil layer 203. When the photovoltaic cable is compressed and bent, the metal wire 204 is in a sliding state relative to the aluminum foil layer 203, which can avoid cracks in the insulating filling layer 201. The tin foil layer 205 and the cross-linked polyethylene layer 206 can effectively install and protect the copper core 207. At the same time, multi-layer protection is performed from the inside to the outside through the insulating filling layer 201, the thermal insulation layer 102 and the polyvinyl chloride layer 101, thereby improving the power transmission stability of the photovoltaic cable.

[0041] A covering interlayer 105 is installed between the thermal insulation layer 102 and the polyvinyl chloride layer 101, and a damage monitoring circuit 116 is fixed inside the covering interlayer 105. An outer shielding layer 106 and an inner shielding layer 107 are respectively provided between the covering interlayer 105 and the polyvinyl chloride layer 101 and the thermal insulation layer 102, so that the polyvinyl chloride layer 101 and the thermal insulation layer 102 can effectively shield and protect the damage monitoring circuit 116 through the outer shielding layer 106 and the inner shielding layer 107, thereby keeping the damage monitoring circuit 116 in stable operation.

[0042] The damage monitoring circuit 116 is composed of a two-core cable 104 and a plurality of dual-resistance connecting rings 109. The sheathed interlayer 105 protects and shapes the two-core cable 104 through the insulating sleeve 103 to keep the spiral-shaped two-core cable 104 stable in use. The monitoring module 108 in the plurality of dual-resistance connecting rings 109 is connected to the two resistance rings 110. At the same time, the current sensor 114 is electrically connected to the two-core cable 104 through the conical connector 112. The two-core cable 104 is composed of an optical fiber and a low-voltage cable. The damage monitoring circuit 116 is connected to electricity, so that the two-core cable 104 is connected to the two resistance rings 110 through the conical connector 112, the current sensor 144 and the two power-connecting metal strips 113 under the covering effect of the insulating sleeve 103, thereby realizing the synchronous power connection operation of the two-core cable 104 to the plurality of dual-resistance connecting rings 109.

[0043] At this time, the current sensor 114 monitors the power connection of the resistance ring 110 through the two power-connected metal strips 113 in the monitoring box 111 and the sealing cover 115. The current sensor 114 and the two resistance rings 110 are connected in series. When the resistance ring 110 is damaged or broken, the current sensor 114 measures the resistance value of the resistance ring 110 with a changed value and transmits the signal through the tapered connector 112 and the optical fiber, thereby quickly and accurately determining the damaged part of the photovoltaic cable, reducing the difficulty of inspection and maintenance, and improving the stability of the photovoltaic cable.

[0044] Multiple monitoring modules 108 are arranged in a spiral along the axis of the dual-core cable 104 to avoid the situation where multiple monitoring modules 108 are on the same straight line and are damaged synchronously. At the same time, multiple linearly arranged dual-resistance connecting rings 109 can evenly monitor and cover the photovoltaic cable, thereby improving the accuracy of monitoring damaged photovoltaic cables. The dual-core cable 104 is located inside the multiple dual-resistance connecting rings 109, so that the dual-core cable 104 can be monitored and isolated through the multiple dual-resistance connecting rings 109, so that when the photovoltaic cable is damaged, the dual-resistance connecting rings 109 can be damaged before the dual-core cable 104, thereby determining the damaged position of the photovoltaic cable before the damage monitoring circuit 116 is powered off.

[0045] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be included therein. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

Claims

1. A high-stability photovoltaic cable, comprising a protection monitoring unit (1), characterized in that: The protection monitoring unit (1) comprises a thermal insulation layer (102), a polyvinyl chloride layer (101) is installed on the outer side of the thermal insulation layer (102), an inner shielding layer (107) is provided on the outer surface of the thermal insulation layer (102), an outer shielding layer (106) is provided on the inner wall of the polyvinyl chloride layer (101), a covering interlayer (105) is installed between the outer shielding layer (106) and the inner shielding layer (107), a damage monitoring circuit (116) is fixedly provided inside the covering interlayer (105), the damage monitoring circuit (116) comprises an insulating sleeve (103), a double-core cable (104) is fixedly installed inside the insulating sleeve (103), and a plurality of double-resistance connecting rings (109) are installed on one side of the double-core cable (104); The dual-resistance connecting ring (109) is composed of a monitoring module (108) and two resistance rings (110), wherein the two resistance rings (110) are symmetrically installed relative to the monitoring module (108), and the monitoring module (108) includes a current sensor (114), and both sides of the current sensor (114) are installed with a power connection metal strip (113), and a conical connector (112) is fixedly provided on the side of the current sensor (114) close to the dual-core cable (104).

2. A high-stability photovoltaic cable according to claim 1, characterized in that: The resistance ring (110) further includes a monitoring box (111) connected to the outside of the current sensor (114), and a sealing cover (115) is installed on the upper end of the monitoring box (111).

3. A high-stability photovoltaic cable according to claim 2, characterized in that: The polyvinyl chloride layer (101) and the outer shielding layer (106) and the thermal insulation layer (102) and the inner shielding layer (107) are all bonded and fixed. A nylon braided layer is provided inside the polyvinyl chloride layer (101). The nylon braided layer is braided by a plurality of nylon threads, and the plurality of nylon threads are divided into warp threads and weft threads.

4. A high-stability photovoltaic cable according to claim 3, characterized in that: A plurality of the dual-resistance connecting rings (109) are linearly arranged along the axis of the coating interlayer (105), and a plurality of the monitoring modules (108) are spirally arranged along the axis of the dual-core cable (104). The dual-core cable (104) is composed of an optical fiber and a low-voltage cable. The insulating sleeve (103) is coated on the outside of the optical fiber and the low-voltage cable. The optical fiber and the low-voltage cable are fixedly connected to the coating interlayer (105) through the insulating sleeve (103).

5. The high-stability photovoltaic cable according to claim 4, characterized in that: The current sensor (114) is fixedly connected to the monitoring box (111), and both sides of the current sensor (114) are fixedly connected to two adjacent power-connecting metal strips (113), and the two power-connecting metal strips (113) are symmetrically installed relative to the current sensor (114).

6. The high-stability photovoltaic cable according to claim 5, characterized in that: One end of the power-connecting metal strip (113) passes through the monitoring box (111) and is fixedly connected to the resistance ring (110). Two adjacent resistance rings (110) and the current sensor (114) are electrically connected via the power-connecting metal strip (113). The current sensor (114) and the two resistance rings (110) are connected in series. A plurality of annular grooves are provided on the surface of the coating interlayer (105). The resistance ring (110) is arranged on the inner side of the annular grooves and is fixedly connected to the coating interlayer (105).

7. The high-stability photovoltaic cable according to claim 6, characterized in that: The coating interlayer (105) is fixedly connected to a plurality of monitoring boxes (111), the monitoring boxes (111) are fixedly connected to the sealing cover (115), the current sensor (114) is arranged between the monitoring box (111) and the sealing cover (115), and the current sensor (114) passes through the monitoring box (111) and the insulating sleeve (103) through one end of the conical connector (112) and is connected to the optical fiber and the low-voltage cable.

8. The high-stability photovoltaic cable according to claim 7, characterized in that: A central support wire (3) is installed inside the protection monitoring unit (1), a power transmission unit (2) is installed between the protection monitoring unit (1) and the central support wire (3), the power transmission unit (2) comprises an insulating filling layer (201), a plurality of battery core assemblies (202) are installed inside the insulating filling layer (201), two aluminum foil layers (203) are installed between each two adjacent battery core assemblies (202), a metal wire (204) is slidably connected inside the aluminum foil layer (203), the battery core assembly (202) comprises a tin foil layer (205), a copper core (207) is installed inside the tin foil layer (205), and a cross-linked polyethylene layer (206) is installed between the tin foil layer (205) and the copper core (207).

9. The high-stability photovoltaic cable according to claim 8, characterized in that: The insulating filling layer (201) is fixedly connected to the plurality of tin foil layers (205) and the aluminum foil layer (203); the insulating filling layer (201) is slidably connected to the plurality of metal wires (204) via the aluminum foil layer (203); the plurality of metal wires (204) and the battery core assembly (202) are arranged in a circle relative to the axis of the insulating filling layer (201); the copper core (207) is fixedly connected to the tin foil layer (205) via a cross-linked polyethylene layer (206); and the aluminum foil layer (203) and the tin foil layer (205) are both spiral-shaped.

10. The high-stability photovoltaic cable according to claim 9, characterized in that: The thermal insulation layer (102) and the central support wire (3) are fixedly connected via an insulating filling layer (201); the central support wire (3) is composed of a plurality of galvanized wires, and the plurality of galvanized wires are connected in a spirally wound manner.

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