High-stability photovoltaic cable

Abstract

The invention relates to the technical field of cables, in particular to a high-stability photovoltaic cable, and solves the problems that when an existing photovoltaic cable is used for transmitting electric energy of photovoltaic power generation, the photovoltaic cable is usually laid in an outdoor environment and is easily affected by an external environment and animals to be damaged, the service life is affected, and the service life of the photovoltaic cable is influenced. The device comprises a protection monitoring unit, the protection monitoring unit comprises a thermal insulation layer, the outer side of the thermal insulation layer is provided with a polyvinyl chloride layer, the outer surface of the thermal insulation layer is provided with an inner shielding layer, and the inner wall of the polyvinyl chloride layer is provided with an outer shielding layer. A wrapping interlayer is installed between the outer shielding layer and the inner shielding layer, a damage monitoring circuit is fixedly arranged in the wrapping interlayer, and the damage monitoring circuit comprises an insulation sleeve. According to the invention, the photovoltaic cable is internally provided with the damage monitoring circuit, so that the damage monitoring of the photovoltaic cable during outdoor application can be realized, and the damaged position can be rapidly and accurately measured.

Description

Technical Field

[0001] The present invention relates to the technical field of cables, and particularly to a highly stable photovoltaic cable. Background Technique

[0002] Photovoltaic cables are an extremely important and indispensable part in solar photovoltaic power generation systems. Usually, the low-voltage direct current generated by photovoltaic power generation is converted into alternating current and then output, and the cable connecting the photovoltaic modules and the AC / DC inverter is the photovoltaic cable. Therefore, as the main trunk for power transmission in photovoltaic power generation facilities, photovoltaic cables are directly related to the safety, reliability, and advancement of solar photovoltaic power generation systems. Most photovoltaic power stations are built outdoors, so it is required that the cables must have good flame retardancy, oil resistance, sunlight aging resistance, acid and alkali resistance, ozone resistance, high temperature and cold resistance, halogen-free and other characteristics.

[0003] When the existing photovoltaic cables transmit the electric energy of photovoltaic power generation, the photovoltaic cables are usually laid in outdoor environments, and are easily damaged by external environments and animals, affecting the service life, and it is not convenient to determine the damaged positions of the photovoltaic cables; therefore, they do not meet the existing requirements, and for this reason, we propose a highly stable photovoltaic cable. Summary of the Invention

[0004] The purpose of the present invention is to provide a highly stable photovoltaic cable to solve the problems raised in the above background technique that when the existing photovoltaic cables transmit the electric energy of photovoltaic power generation, the photovoltaic cables are usually laid in outdoor environments, are easily damaged by external environments and animals, affecting the service life, and it is not convenient to determine the damaged positions of the photovoltaic cables.

[0005] To achieve the above purpose, the present invention provides the following technical solution: A highly stable photovoltaic cable, including a protection and monitoring unit, the protection and monitoring unit includes a heat insulation layer, a polyvinyl chloride layer is installed outside the heat insulation layer, an inner shielding layer is provided on the outer surface of the heat insulation layer, an outer shielding layer is provided on the inner wall of the polyvinyl chloride layer, a cladding sandwich is installed between the outer shielding layer and the inner shielding layer, a damage monitoring circuit is fixedly provided inside the cladding sandwich, the damage monitoring circuit includes an insulating sleeve, a double-core cable is fixedly installed inside the insulating sleeve, and a plurality of double-resistance power connection rings are installed on one side of the double-core cable; The double-resistance power connection ring is composed of a monitoring module and two resistance rings, the two resistance rings are symmetrically installed relative to the monitoring module, the monitoring module includes a current sensor, power connection metal strips are installed on both sides of the current sensor, and a conical connection head is fixedly provided on the side of the current sensor close to the double-core cable.

[0006] Preferably, the resistance ring further includes a monitoring box connected to the outside of the current sensor, and a sealing cover is installed on the upper end of the monitoring box.

[0007] Preferably, the polyvinyl chloride layer is adhesively fixed to the outer shielding layer, and the heat insulation layer is adhesively fixed to the inner shielding layer. A nylon braided layer is provided inside the polyvinyl chloride layer. The nylon braided layer is composed of multiple nylon threads, and the multiple nylon threads are divided into warp threads and weft threads.

[0008] Preferably, the multiple double-resistance power connection rings are linearly arranged along the axis of the cladding sandwich layer, and the multiple monitoring modules are spirally arranged along the axis of the two-core cable. The two-core cable is composed of an optical fiber and a low-voltage cable. The insulating sleeve is coated 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 cladding sandwich layer through the insulating sleeve.

[0009] Preferably, the current sensor is fixedly connected to the monitoring box. Both sides of the current sensor are fixedly connected to the adjacent two power connection metal strips, and the two power connection metal strips are symmetrically installed relative to the current sensor.

[0010] Preferably, one end of the power connection metal strip penetrates through the monitoring box and is fixedly connected to the resistance ring. The adjacent two resistance rings and the current sensor are electrically connected through the power connection metal strip. The current sensor and the two resistance rings are in a series state. Multiple annular grooves are provided on the surface of the cladding sandwich layer, and the resistance ring is arranged inside the annular groove and fixedly connected to the cladding sandwich layer.

[0011] Preferably, the cladding sandwich layer is fixedly connected to the multiple monitoring boxes, the monitoring boxes are fixedly connected to the sealing covers, the current sensor is arranged between the monitoring box and the sealing cover, and one end of the current sensor penetrates through the monitoring box and the insulating sleeve through a conical connector and is connected to the optical fiber and the low-voltage cable.

[0012] Preferably, a central support wire is installed inside the protection and monitoring unit, and a power transmission unit is installed between the protection and monitoring unit and the central support wire. The power transmission unit includes an insulating filling layer. Multiple battery cell assemblies are installed inside the insulating filling layer. Two aluminum foil layers are installed between every two adjacent battery cell assemblies. A metal wire is slidably connected inside the aluminum foil layer. The battery cell assembly includes a tin foil layer. A copper core is installed inside the tin foil layer. A cross-linked polyethylene layer is installed between the tin foil layer and the copper core.

[0013] Preferably, the insulating filling layer is fixedly connected to the multiple tin foil layers and aluminum foil layers. The insulating filling layer is slidably connected to the multiple metal wires through the aluminum foil layer. The multiple metal wires and battery cell assemblies are arranged in a circular pattern relative to the axis of the insulating filling layer. The copper core is fixedly connected to the tin foil layer through the cross-linked polyethylene layer. The aluminum foil layer and the tin foil layer are both spiral.

[0014] Preferably, the heat insulation layer and the central support wire are fixedly connected through an insulating filling layer. The central support wire is composed of multiple galvanized wires, and the multiple galvanized wires are connected in a spiral winding manner.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. In the present invention, the central support wire and the multiple metal wires arranged in a circumference facilitate maintaining the bending and compressive strength of the photovoltaic cable. Moreover, the multiple metal wires and the insulating filling layer are all slidably connected through the 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 avoid cracks inside the insulating filling layer. The tin foil layer and the cross-linked polyethylene layer can effectively protect the copper core. The polyvinyl chloride layer and the heat 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. 2. In the present invention, the two-core cable is electrically connected to the two resistance rings through the conical connector, the current sensor, and the two electrical connection metal strips under the wrapping action of the insulating sleeve, thereby realizing the synchronous electrical connection operation of the two-core cable to multiple double-resistance electrical connection rings. The current sensor monitors the electrical connection of the resistance rings through the two electrical connection metal strips. The current sensor and the two resistance rings are in a series state. The current sensor determines 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 use stability of the photovoltaic cable. 3. In the present invention, multiple monitoring modules are arranged in a spiral along the axis of the two-core cable, avoiding the situation that multiple monitoring modules are synchronously damaged when they are on the same straight line. At the same time, multiple linearly arranged double-resistance electrical connection rings can uniformly monitor and wrap the photovoltaic cable, improving the accuracy of monitoring the damage of the photovoltaic cable. Moreover, the two-core cable is inside multiple double-resistance electrical connection rings, enabling multiple double-resistance electrical connection rings to monitor and isolate the two-core cable, facilitating the double-resistance electrical connection rings to be damaged prior to the two-core cable when the photovoltaic cable is damaged, and thus determining the damaged position of the photovoltaic cable before the damage monitoring circuit is powered off. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic structural diagram of the photovoltaic cable of the present invention; Figure 2 is a schematic cross-sectional structural diagram of the photovoltaic cable of the present invention; Figure 3 is a schematic partial structural diagram of the power transmission unit of the present invention; Figure 4 is a schematic partial structural diagram of the protection and monitoring unit of the present invention; Figure 5 is the present invention Figure 4 a schematic cross-sectional structural diagram of area A in; Figure 6 Schematic installation structure diagram of the double-resistance power connection ring of the present invention; Figure 7 Schematic installation structure diagram of the resistance ring of the present invention; Figure 8 Schematic installation structure diagram of the monitoring module of the present invention; Figure 9 Schematic structure diagram of the monitoring module of the present invention; Figure 10 Schematic explosion structure diagram of the monitoring module of the present invention; Figure 11 Schematic structure diagram of the damage monitoring circuit of the present invention.

[0017] In the figure: 1. Protection and monitoring unit; 101. Polyvinyl chloride layer; 102. Heat insulation layer; 103. Insulating sleeve; 104. Twin-core cable; 105. Cladding layer; 106. Outer shielding layer; 107. Inner shielding layer; 108. Monitoring module; 109. Double-resistance power connection ring; 110. Resistance ring; 111. Monitoring box; 112. Conical connector; 113. Power connection metal strip; 114. Current sensor; 115. Sealing cover; 116. Damage monitoring circuit; 2. Power transmission unit; 201. Insulating filling layer; 202. Battery cell assembly; 203. Aluminum foil layer; 204. Metal wire; 205. Tin foil layer; 206. Cross-linked polyethylene layer; 207. Copper core; 3. Central support wire. Specific embodiments

[0018] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0019] Please refer to Figures 2 to 5 , an embodiment provided by the present invention: a highly stable photovoltaic cable, including a protection and monitoring unit 1. The protection and monitoring unit 1 includes a heat insulation layer 102. The outside of the heat insulation layer 102 is provided with a polyvinyl chloride layer 101. The outer surface of the heat insulation layer 102 is provided with an inner shielding layer 107. The inner wall of the polyvinyl chloride layer 101 is provided with an outer shielding layer 106. The polyvinyl chloride layer 101 and the outer shielding layer 106, and the heat insulation layer 102 and the inner shielding layer 107 are both adhesively fixed. The inside of the polyvinyl chloride layer 101 is provided with a nylon braid layer. The nylon braid layer is composed of a plurality of nylon wires woven. The plurality of nylon wires are divided into warp and weft. A cladding layer 105 is installed between the outer shielding layer 106 and the inner shielding layer 107. The inside of the cladding layer 105 is fixedly provided with a damage monitoring circuit 116, so that the polyvinyl chloride layer 101 and the heat 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, and keep the damage monitoring circuit 116 operating stably; The damage monitoring circuit 116 includes an insulating sleeve 103. Inside the insulating sleeve 103, a twin-core cable 104 is fixedly installed. On one side of the twin-core cable 104, a plurality of double-resistance slip rings 109 are installed. The twin-core cable 104 is composed of an optical fiber and a low-voltage cable. The insulating sleeve 103 covers 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 sandwich 105 through the insulating sleeve 103. Through the low-voltage cable, a plurality of double-resistance slip rings 109 can be powered synchronously, and the status signals of the double-resistance slip rings 109 can be transmitted through the optical fiber.

[0020] Please refer to Figures 5 to 7 , a plurality of double-resistance slip rings 109 are linearly arranged along the axis of the coating sandwich 105. The double-resistance slip ring 109 is composed of a monitoring module 108 and two resistance rings 110. A plurality of monitoring modules 108 are spirally arranged along the axis of the twin-core cable 104. The two resistance rings 110 are symmetrically installed relative to the monitoring module 108. A plurality of annular grooves are provided on the surface of the coating sandwich 105. The resistance rings 110 are arranged inside the annular grooves and fixedly connected to the coating sandwich 105. The coating sandwich 105 protects and shapes the twin-core cable 104 through the insulating sleeve 103 to keep the spiral twin-core cable 104 stable in use.

[0021] Please refer to Figures 8 to 11 , the monitoring module 108 includes a current sensor 114. The current sensor 114 is in series with the two resistance rings 110. Connecting metal strips 113 are installed on both sides of the current sensor 114. Adjacent two resistance rings 110 and the current sensor 114 are electrically connected through the connecting metal strips 113. A conical connector 112 is fixedly provided on the side of the current sensor 114 close to the twin-core cable 104. A monitoring box 111 is installed outside the current sensor 114. The coating sandwich 105 is fixedly connected to a plurality of monitoring boxes 111. One end of the connecting metal strip 113 penetrates 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 connecting metal strips 113 inside the monitoring box 111 and the sealing cover 115; The current sensor 114 is fixedly connected to the monitoring box 111. Both sides of the current sensor 114 are fixedly connected to two adjacent power connection metal strips 113. The two power connection metal strips 113 are symmetrically installed relative to the current sensor 114. One end of the current sensor 114 passes through the monitoring box 111 and the insulating sleeve 103 through the tapered connector 112 and is connected to the optical fiber and the low-voltage cable. A sealing cover 115 is installed at 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 with a changed resistance value and transmits signals through the tapered connector 112 and the optical fiber, so as to quickly and accurately determine the damaged part of the photovoltaic cable.

[0022] Please refer to Figures 1 to 3 , 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 includes an insulating filling layer 201. The heat insulation layer 102 and the central support wire 3 are fixedly connected through the insulating filling layer 201. The central support wire 3 is composed of multiple galvanized wires, and the multiple galvanized wires are spirally wound and connected. A plurality of cell components 202 are installed inside the insulating filling layer 201. Two aluminum foil layers 203 are installed between every two adjacent cell components 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; A metal wire 204 is slidably connected inside the aluminum foil layer 203. 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 cell components 202 are arranged in a circle relative to the axis of the insulating filling layer 201. The cell component 202 includes a tin foil layer 205. The insulating filling layer 201 is fixedly connected to the multiple tin foil layers 205 and the aluminum foil layers 203. A copper core 207 is installed inside the tin foil layer 205. A cross-linked polyethylene layer 206 is installed between the tin foil layer 205 and the copper core 207. The copper core 207 and the tin foil layer 205 are fixedly connected through the cross-linked polyethylene layer 206. Both the aluminum foil layer 203 and the tin foil layer 205 are spiral. 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 inside the insulating filling layer 201.

[0023] In summary, the photovoltaic cable is assembled by arranging the protection monitoring unit 1, the power transmission unit 2, and the central support wire 3 in sequence from the outside to the inside. When the photovoltaic cable transmits electrical energy for photovoltaic power generation, a metal wire 204 is installed between every two adjacent battery cell components 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. Moreover, the multiple metal wires 204 and the insulation filling layer 201 are both slidably connected 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 prevent cracks from occurring inside the insulation filling layer 201. The copper core 207 can be effectively installed and protected through the tin foil layer 205 and the cross-linked polyethylene layer 206. At the same time, multi-layer protection is carried out in sequence from the inside to the outside through the insulation filling layer 201, the heat insulation layer 102, and the polyvinyl chloride layer 101, improving the power transmission stability of the photovoltaic cable; A coating sandwich layer 105 is installed between the heat insulation layer 102 and the polyvinyl chloride layer 101, and a damage monitoring circuit 116 is fixedly arranged inside the coating sandwich layer 105. An outer shielding layer 106 and an inner shielding layer 107 are respectively arranged between the coating sandwich layer 105 and the polyvinyl chloride layer 101 and the heat insulation layer 102, so that the polyvinyl chloride layer 101 and the heat 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, maintaining the stable operation of the damage monitoring circuit 116.

[0024] The damage monitoring circuit 116 is composed of a two-core cable 104 and multiple double-resistance power connection rings 109. The coating sandwich layer 105 protects and shapes the two-core cable 104 through the insulating sleeve 103, maintaining the stable use of the spiral two-core cable 104. The monitoring module 108 in the multiple double-resistance power connection rings 109 is connected to the two resistance rings 110. At the same time, the current sensor 114 and the two-core cable 104 are electrically connected through the conical connector 112. The two-core cable 104 is composed of an optical fiber and a low-voltage cable, and power is connected to the damage monitoring circuit 116, so that the two-core cable 104, under the wrapping action of the insulating sleeve 103, conducts electricity to the two resistance rings 110 through the conical connector 112, the current sensor 144, and the two power connection metal strips 113, thereby realizing the synchronous power connection operation of the two-core cable 104 to the multiple double-resistance power connection rings 109; At this time, the current sensor 114 conducts electricity monitoring on the resistance ring 110 through the two power connection metal strips 113 in the monitoring box 111 and the sealing cover 115. The current sensor 114 and the two resistance rings 110 are in a series state. When the resistance ring 110 is damaged or broken, the current sensor 114 measures the resistance ring 110 with a changed resistance value and transmits signals through the conical connector 112 and the optical fiber, and thus can quickly and accurately determine the damaged part of the photovoltaic cable, reducing the difficulty of repair and maintenance and improving the use stability of the photovoltaic cable; A plurality of monitoring modules 108 are arranged in a spiral along the axis of the twin-core cable 104, avoiding the situation that the plurality of monitoring modules 108 are damaged synchronously when they are on the same straight line. At the same time, a plurality of linearly arranged double-resistance slip rings 109 can uniformly monitor and cover the photovoltaic cable, improving the accuracy of monitoring the damage of the photovoltaic cable. Moreover, the twin-core cable 104 is inside the plurality of double-resistance slip rings 109, so that the twin-core cable 104 can be monitored and isolated through the plurality of double-resistance slip rings 109, facilitating the double-resistance slip rings 109 to be damaged prior to the twin-core cable 104 when the photovoltaic cable is damaged, and further determining the damaged position of the photovoltaic cable before the breakage monitoring circuit 116 is powered off.

[0025] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above-described exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, in any aspect, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be embraced within the present invention. Any reference numerals in the claims should not be construed as limiting the claims involved.

Claims

1. A highly stable photovoltaic cable, comprising a protection and monitoring unit (1), characterized in that: The described protection monitoring unit (1) includes a heat insulation layer (102). A polyvinyl chloride layer (101) is installed on the outer side of the heat insulation layer (102). An inner shielding layer (107) is provided on the outer surface of the heat insulation layer (102). An outer shielding layer (106) is provided on the inner wall of the polyvinyl chloride layer (101). A cladding sandwich layer (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 cladding sandwich layer (105). The damage monitoring circuit (116) includes an insulating sleeve (103). A twin-core cable (104) is fixedly installed inside the insulating sleeve (103). A plurality of double-resistance slip rings (109) are installed on one side of the twin-core cable (104); The double-resistance slip ring (109) is composed of a monitoring module (108) and two resistance rings (110). The two resistance rings (110) are symmetrically installed relative to the monitoring module (108). The monitoring module (108) includes a current sensor (114). Connecting metal strips (113) are installed on both sides of the current sensor (114). A conical connector (112) is fixedly provided on the side of the current sensor (114) close to the twin-core cable (104).

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

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

4. A highly stable photovoltaic cable according to claim 3, characterized in that: The plurality of double-resistance slip rings (109) are linearly arranged along the axis of the cladding sandwich layer (105). The plurality of monitoring modules (108) are spirally arranged along the axis of the twin-core cable (104). The twin-core cable (104) is composed of an optical fiber and a low-voltage cable. The insulating sleeve (103) covers the outside of the optical fiber and the low-voltage cable. The optical fiber and the low-voltage cable are fixedly connected to the cladding sandwich layer (105) through the insulating sleeve (103).

5. A highly stable photovoltaic cable according to claim 4, characterized in that: The current sensor (114) is fixedly connected to the monitoring box (111). The two sides of the current sensor (114) are fixedly connected to the adjacent two connecting metal strips (113). The two 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 connecting metal strip (113) penetrates through the monitoring box (111) and is fixedly connected to the resistance ring (110). The adjacent two resistance rings (110) and the current sensor (114) are electrically connected through the connecting metal strip (113). The current sensor (114) and the two resistance rings (110) are in a series state. A plurality of annular grooves are provided on the surface of the cladding sandwich layer (105). The resistance ring (110) is arranged inside the annular groove and is fixedly connected to the cladding sandwich layer (105).

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

8. A highly stable photovoltaic cable according to claim 7, characterized in that: A central support wire (3) is installed inside the protection and monitoring unit (1), 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), a plurality of battery cell assemblies (202) are installed inside the insulating filling layer (201), two aluminum foil layers (203) are installed between every two adjacent battery cell assemblies (202), a metal wire (204) is slidably connected inside the aluminum foil layer (203), the battery cell assembly (202) includes 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 a plurality of tin foil layers (205) and aluminum foil layers (203), the insulating filling layer (201) is slidably connected to a plurality of metal wires (204) through the aluminum foil layer (203), the plurality of metal wires (204) and the battery cell assemblies (202) are arranged in a circular pattern with respect to the axis of the insulating filling layer (201), the copper core (207) is fixedly connected to the tin foil layer (205) through the cross-linked polyethylene layer (206), and both the aluminum foil layer (203) and the tin foil layer (205) are spiral.

10. A highly stable photovoltaic cable according to claim 9, characterized in that: The heat 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 connected in a spiral winding manner.

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