High-temperature-resistant photovoltaic cable and preparation method thereof

Abstract

The invention relates to the technical field of photovoltaic cables, in particular to a high-temperature-resistant photovoltaic cable which comprises a copper conductor, an insulating layer and a sheath layer. The insulating layer comprises the following components in parts by weight: 50-70 parts of a matrix, 20-40 parts of a filler, 5-15 parts of a plasticizer and 1-5 parts of an additive; the additives comprise an anti-ultraviolet agent, an antioxidant, an antistatic agent and a flame retardant in a mass ratio of 1: (2-5): (2-5): (10-15); the sheath layer is made of a cross-linked polyolefin material or a silicone rubber material. By improving the formula, the insulating layer and the sheath layer have better high-temperature resistance, the problem that a traditional photovoltaic cable is aged in a high-temperature environment is effectively solved, and the excellent high-temperature resistance of the cable can ensure that the cable safely and reliably transmits electric power in a long-time high-temperature working state; therefore, the safety, the reliability and the economic benefit of a photovoltaic power generation system are improved, and the flame retardance and the ultraviolet aging resistance of the cable are greatly enhanced through electron irradiation treatment.

Description

Technical Field

[0001] The present invention relates to the technical field of photovoltaic cables, and in particular to a high temperature resistant photovoltaic cable and a preparation method thereof. Background Art

[0002] Membrane concentration equipment has been widely used in many fields such as water treatment, food industry, biomedicine, etc. It can achieve a high-efficiency concentration process at a lower operating temperature and has the ability to handle high-viscosity materials, effectively improving the material quality retention and production efficiency.

[0003] The concentration equipment is mainly composed of a rotating shaft, a feed-liquid distribution plate, a scraper, an evaporation chamber, etc. The feed liquid is evenly applied to a rotating circular scraper, then evaporated by heating, and the scraper is used to scrape off the residual material in the liquid to obtain dry solid matter and concentrated liquid. However, a continuous supply of heat medium is required to heat the feed liquid during the concentration process. The heat medium cannot be recycled, and the heat generated during the concentration process cannot be recovered. To achieve the desired concentration effect, a higher heating temperature is required, the heat energy consumption is large, and the feed liquid cannot be heated up quickly, and a higher concentration efficiency cannot be achieved.

[0004] Therefore, in order to address the above-mentioned problems of low concentration efficiency and inability to recycle heat, a high-temperature resistant photovoltaic cable and a preparation method thereof can be designed. Summary of the invention

[0005] In order to overcome the problems of low concentration efficiency and inability to recover heat.

[0006] The technical solution of the present invention is: a high temperature resistant photovoltaic cable, comprising a copper conductor, an insulating layer and a sheath layer; The insulating layer comprises the following components in parts by weight: 50 to 70 parts of a matrix, 20 to 40 parts of a filler, 5 to 15 parts of a plasticizer and 1 to 5 parts of an additive; The additives include UV protection agent, antioxidant, antistatic agent and flame retardant, and the mass ratio thereof is 1: (2-5): (2-5): (10-15); The sheath layer is made of cross-linked polyolefin material or silicone rubber material.

[0007] Preferably, the copper conductor is formed by stranding annealed copper or tinned copper wires specified in ASTM B3 or EN13602.

[0008] Preferably, the matrix is ​​any one or more of polyphenylene sulfide, polytetrafluoroethylene, polyetheretherketone, flexible polyphenylene ether and polyimide.

[0009] Preferably, the filler is any one or more combinations of carbon black, talcum powder, mica powder and quartz sand.

[0010] Preferably, the plasticizer is a phthalate, phosphate or methacrylate plasticizer.

[0011] A method for preparing a high temperature resistant photovoltaic cable, comprising the high temperature resistant photovoltaic cable as described above, and the steps are as follows: S1: The annealed copper or tinned copper wire is twisted into a conductor by a stranding machine; S2: The matrix, filler, plasticizer and additive are fully mixed and then added into the hopper of the extruder. The molten insulating material is evenly coated on the surface of the conductor through the extruder to form an insulating layer. The extruded wire is cooled by water or air. S3: Then, in the same way as S2, another sheath layer is extruded outside the insulation layer to form the final structure of the cable; S4: placing the cable in an irradiation chamber and irradiating it with an electron beam; S5: After the irradiation is completed, the cable is annealed and cooled to eliminate the internal stress and residual stress generated during the irradiation process; S51: The temperature inside the cooling furnace is pre-controlled at 100-200°C. After the cable is taken out of the irradiation chamber, it is immediately transferred to the cooling furnace, and then the cooling rate is set to 10-20°C / hour; S52: After cooling in the preheating chamber or cooling furnace, transfer the cable to ambient temperature for natural cooling; S6: Spray epoxy resin paint, polyurethane paint or acrylic paint on the cable surface through spraying equipment, and then cure it; S7: Product testing, packaging and storage.

[0012] Preferably, the extrusion temperature is 180-210° C., the speed is 15-25 m / min, and the pressure is 20-40 MPa.

[0013] Preferably, the electron energy range of the electron accelerator used in the irradiation treatment is 0.15-10 MeV.

[0014] The beneficial effects of the present invention are as follows: through the improvement of the formula, the insulating layer and the sheath layer have better high temperature resistance, which effectively solves the problem of aging of traditional photovoltaic cables in high temperature environments. Its excellent high temperature resistance can ensure that the cable can safely and reliably transmit electricity under long-term high temperature working conditions, extend its service life, thereby improving the safety, reliability and economic benefits of the photovoltaic power generation system. The flame retardant and anti-ultraviolet aging properties of the cable are greatly enhanced through electron irradiation treatment. By spraying the cable surface, the temperature resistance and mechanical strength of the cable are improved, and it can also prevent corrosion and aging. DETAILED DESCRIPTION

[0015] The present invention will be further described below in conjunction with the embodiments.

[0016] Example 1 The present invention provides an embodiment: a high temperature resistant photovoltaic cable, comprising a copper conductor, an insulating layer and a sheath layer; The insulating layer includes the following components in parts by weight: 50 parts of a matrix, 20 parts of a filler, 5 parts of a plasticizer, and 1 part of an additive; The additives include UV protection agent, antioxidant, antistatic agent and flame retardant, and the mass ratio thereof is 1:2:2:10; The sheath layer is made of cross-linked polyolefin material.

[0017] Preferably, the copper conductor is stranded using annealed copper specified in ASTM B3 or EN13602.

[0018] Preferably, the matrix is ​​made of polyphenylene sulfide.

[0019] Preferably, the fillers are carbon black and talc.

[0020] Preferably, the plasticizer is a phthalate plasticizer.

[0021] A method for preparing a high temperature resistant photovoltaic cable, comprising the high temperature resistant photovoltaic cable as described above, and the steps are as follows: S1: The annealed copper wire is passed through a stranding machine to twist multiple copper wires into a conductor; S2: The matrix, filler, plasticizer and additive are fully mixed and then added into the hopper of the extruder. The molten insulating material is evenly coated on the surface of the conductor through the extruder to form an insulating layer. The extruded wire is cooled by water or air. S3: Then, in the same way as S2, another sheath layer is extruded outside the insulation layer to form the final structure of the cable; S4: placing the cable in an irradiation chamber and irradiating it with an electron beam; S5: After the irradiation is completed, the cable is annealed and cooled to eliminate the internal stress and residual stress generated during the irradiation process; S51: The temperature inside the cooling furnace is pre-controlled at 100°C. After the cable is taken out of the irradiation chamber, it is immediately transferred to the cooling furnace, and the cooling rate is set to 10°C / hour; S52: After cooling in the preheating chamber or cooling furnace, transfer the cable to ambient temperature for natural cooling; S6: Spray the polyurethane coating on the cable surface through a spraying device, and then cure it; S7: Product testing, packaging and storage.

[0022] Preferably, the extrusion temperature is 180° C., the speed is 15 m / min, and the pressure is 20 MPa.

[0023] Preferably, the electron energy range of the electron accelerator used in the irradiation treatment is 0.15 MeV.

[0024] Example 2 The present invention provides an embodiment: a high temperature resistant photovoltaic cable, comprising a copper conductor, an insulating layer and a sheath layer; The insulating layer includes the following components in parts by weight: 70 parts of a matrix, 40 parts of a filler, 15 parts of a plasticizer, and 5 parts of an additive; The additives include UV protection agent, antioxidant, antistatic agent and flame retardant, and the mass ratio thereof is 1:5:5:15; The sheath layer is made of silicone rubber material.

[0025] Preferably, the copper conductor is formed by stranding tinned copper wires specified in ASTM B3 or EN13602.

[0026] Preferably, the matrix is ​​made of polytetrafluoroethylene and polyetheretherketone.

[0027] Preferably, the filler is mica powder and quartz sand.

[0028] Preferably, the plasticizer is a phosphate plasticizer.

[0029] A method for preparing a high temperature resistant photovoltaic cable, comprising the high temperature resistant photovoltaic cable as described above, and the steps are as follows: S1: The annealed copper or tinned copper wire is twisted into a conductor by a stranding machine; S2: The matrix, filler, plasticizer and additive are fully mixed and then added into the hopper of the extruder. The molten insulating material is evenly coated on the surface of the conductor through the extruder to form an insulating layer. The extruded wire is cooled by water or air. S3: Then, in the same way as S2, another sheath layer is extruded outside the insulation layer to form the final structure of the cable; S4: placing the cable in an irradiation chamber and irradiating it with an electron beam; S5: After the irradiation is completed, the cable is annealed and cooled to eliminate the internal stress and residual stress generated during the irradiation process; S51: The temperature inside the cooling furnace is pre-controlled at 200°C. After the cable is taken out of the irradiation chamber, it is immediately transferred to the cooling furnace, and the cooling rate is set to 20°C / hour; S52: After cooling in the preheating chamber or cooling furnace, transfer the cable to ambient temperature for natural cooling; S6: Spraying acrylic paint on the cable surface through a spraying device, and then curing it; S7: Product testing, packaging and storage.

[0030] Preferably, the extrusion temperature is 210° C., the speed is 25 m / min, and the pressure is 40 MPa.

[0031] Preferably, the electron energy range of the electron accelerator used in the irradiation treatment is 10 MeV.

[0032] Example 3 The present invention provides an embodiment: a high temperature resistant photovoltaic cable, comprising a copper conductor, an insulating layer and a sheath layer; The insulating layer includes the following components in parts by weight: 60 parts of a matrix, 30 parts of a filler, 12 parts of a plasticizer, and 3 parts of an additive; The additives include UV protection agent, antioxidant, antistatic agent and flame retardant, and the mass ratio thereof is 1:3:4:13; The sheath layer is made of cross-linked polyolefin material.

[0033] Preferably, the copper conductor is formed by stranding tinned copper wires specified in ASTM B3 or EN13602.

[0034] Preferably, the matrix is ​​made of flexible polyphenylene ether and polyimide.

[0035] Preferably, the filler is carbon black and quartz sand.

[0036] Preferably, the plasticizer is a phthalate, phosphate or methacrylate plasticizer.

[0037] A method for preparing a high temperature resistant photovoltaic cable, comprising the high temperature resistant photovoltaic cable as described above, and the steps are as follows: S1: The annealed copper or tinned copper wire is twisted into a conductor by a stranding machine; S2: The matrix, filler, plasticizer and additive are fully mixed and then added into the hopper of the extruder. The molten insulating material is evenly coated on the surface of the conductor through the extruder to form an insulating layer. The extruded wire is cooled by water or air. S3: Then, in the same way as S2, another sheath layer is extruded outside the insulation layer to form the final structure of the cable; S4: placing the cable in an irradiation chamber and irradiating it with an electron beam; S5: After the irradiation is completed, the cable is annealed and cooled to eliminate the internal stress and residual stress generated during the irradiation process; S51: The temperature inside the cooling furnace is pre-controlled at 180°C. After the cable is taken out of the irradiation chamber, it is immediately transferred to the cooling furnace, and the cooling rate is set to 15°C / hour; S52: After cooling in the preheating chamber or cooling furnace, transfer the cable to ambient temperature for natural cooling; S6: Spray epoxy resin coating on the cable surface through spraying equipment, and then cure it; S7: Product testing, packaging and storage.

[0038] Preferably, the extrusion temperature is 190° C., the speed is 18 m / min, and the pressure is 30 MPa.

[0039] Preferably, the electron energy range of the electron accelerator used in the irradiation treatment is 5 MeV.

[0040] The performance index table of high temperature resistant photovoltaic cables prepared by using Example 1, Example 2 and Example 3 is shown in the following table: It can be seen from the above table that the high temperature resistant photovoltaic cable prepared by Example 3 of the present invention has good elasticity, passes the thermal life assessment to ensure its safety in long-term use, has a wide temperature resistance range, can maintain a stable working state at both high and low temperatures, and will not cause material aging or failure due to excessive temperature, thereby reducing the occurrence of system failures, improving the reliability of the photovoltaic power generation system, and can operate stably for a long time in harsh environments such as high temperature, low temperature, humidity, and ultraviolet rays. It is suitable for various complex climatic conditions and enhances the adaptability and stability of the system.

[0041] The embodiments of the present invention are described in detail above, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of those skilled in the art without departing from the spirit of the present invention.

Claims

1. A high temperature resistant photovoltaic cable, comprising a copper conductor, an insulation layer and a sheath layer; characterized in that: The insulating layer comprises the following components in parts by weight: 50 to 70 parts of a matrix, 20 to 40 parts of a filler, 5 to 15 parts of a plasticizer and 1 to 5 parts of an additive; The additives include UV protection agent, antioxidant, antistatic agent and flame retardant, and the mass ratio thereof is 1: (2-5): (2-5): (10-15); The sheath layer is made of cross-linked polyolefin material or silicone rubber material.

2. The high temperature resistant photovoltaic cable according to claim 1, characterized in that: The copper conductor is made of annealed copper or tinned copper wire specified in ASTMB3 or EN13602.

3. The high temperature resistant photovoltaic cable according to claim 2, characterized in that: The matrix is ​​any one or more combinations of polyphenylene sulfide, polytetrafluoroethylene, polyetheretherketone, flexible polyphenylene ether and polyimide.

4. The high temperature resistant photovoltaic cable according to claim 3, characterized in that: The filler is any one or more combinations of carbon black, talcum powder, mica powder and quartz sand.

5. The high temperature resistant photovoltaic cable according to claim 4, characterized in that: The plasticizer is a phthalate, phosphate or methacrylate plasticizer.

6. A method for preparing a high temperature resistant photovoltaic cable, characterized in that The method comprises the following steps: S1: The annealed copper or tinned copper wire is twisted into a conductor by a stranding machine; S2: The matrix, filler, plasticizer and additive are fully mixed and then added into the hopper of the extruder. The molten insulating material is evenly coated on the surface of the conductor through the extruder to form an insulating layer. The extruded wire is cooled by water or air. S3: Then, in the same way as S2, another sheath layer is extruded outside the insulation layer to form the final structure of the cable; S4: placing the cable in an irradiation chamber and irradiating it with an electron beam; S5: After the irradiation is completed, the cable is annealed and cooled to eliminate the internal stress and residual stress generated during the irradiation process; S51: The temperature inside the cooling furnace is pre-controlled at 100-200°C. After the cable is taken out of the irradiation chamber, it is immediately transferred to the cooling furnace, and then the cooling rate is set to 10-20°C / hour; S52: After cooling in the preheating chamber or cooling furnace, transfer the cable to ambient temperature for natural cooling; S6: Spray epoxy resin paint, polyurethane paint or acrylic paint on the cable surface through spraying equipment, and then cure it; S7: Product testing, packaging and storage.

7. The method for preparing a high temperature resistant photovoltaic cable according to claim 6, characterized in that: The extrusion temperature is 180-210°C, the speed is 15-25 m / min, and the pressure is 20-40 MPa.

8. The method for preparing a high temperature resistant photovoltaic cable according to claim 6, characterized in that: The electron energy range of the electron accelerator used in the irradiation treatment is 0.15 to 10 MeV.

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