Photovoltaic energy storage flat cable

Abstract

The utility model relates to a photovoltaic energy storage flat cable, which comprises an outer sheath, an outer braid layer, a lead unit 1 and a lead unit 2, the outer braid layer is wound on the outer walls of the lead unit 1 and the lead unit 2, the outer sheath is sleeved outside the outer braid layer, and the cross sections of the outer sheath and the outer braid layer are elliptical; the first wire unit comprises a first core wire, a second core wire, a third core wire, a fourth core wire, a first filling layer, a first ground wire, a first wrapping layer, a first inner braid layer and a first inner sheath. The photovoltaic energy storage flat cable provided by the utility model is helpful for obviously improving the adaptability to high and low temperature environments and flame-retardant environments so as to avoid the embrittlement phenomenon caused by high and low temperatures and the threat of life safety caused by a large amount of harmful gases generated in fire disasters. And the DG photovoltaic energy storage cable has excellent flame retardance, low smoke performance, oil corrosion resistance, battery liquid corrosion resistance and ultraviolet resistance, so that the long service life is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of cables, in particular to a photovoltaic energy storage flat cable. Background Art

[0002] Photovoltaic distributed generation is a new type of power generation and comprehensive energy utilization method with broad development prospects. It advocates the principles of generating electricity nearby, connecting to the grid nearby, converting nearby, and using nearby, making full use of local solar energy resources to replace and reduce fossil energy consumption. It can not only effectively increase the power generation of a photovoltaic power station of the same scale, but also solve the problem of power loss in step-up and long-distance transportation.

[0003] The UL3003 distributed photovoltaic cable fills the blank of the existing UL standard for photovoltaic wires and cables. This kind of photovoltaic cable is mainly used to transmit the DC electric energy generated by solar panels to the inverter, and is suitable for installation in environments with large temperature changes, long-term mechanical wear, and chemical corrosion, and it is necessary to maintain the safety and reliability during the operation of the cable.

[0004] However, photovoltaic cables are usually installed in outdoor photovoltaic power generation systems and need to withstand the influence of sunlight, rainwater and other natural environments. Therefore, they need to have good weather resistance and be able to resist corrosion such as ultraviolet rays and acid rain.

[0005] The current energy storage cables: First, in the harsh outdoor use environment, such as high temperature, low temperature, humidity and other conditions, the photovoltaic cable may have problems such as aging and cracking, which will affect the stability and reliability of the entire photovoltaic power generation system, and there is a risk of embrittlement at low temperatures such as -40°C; Second, the weather resistance, corrosion resistance to oils such as lubricating oil, FT4 flame retardant performance and even low temperature impact resistance cannot meet the industry's expected requirements. Summary of the Utility Model

[0006] Therefore, the technical problem to be solved by the utility model is to overcome the problem that the performance of the energy storage cable needs to be further improved in the harsh use environment in the prior art.

[0007] To solve the above technical problems, the present utility model provides a photovoltaic energy storage flat cable, comprising: an outer sheath, an outer braided layer, a first wire unit and a second wire unit. The outer braided layer is wound around the outer walls of the first wire unit and the second wire unit. The outer sheath is sleeved outside the outer braided layer. The cross-sections of the outer sheath and the outer braided layer are oval. The first wire unit includes a first core wire, a second core wire, a third core wire, a fourth core wire, a first filling layer, a first ground wire, a first wrapping layer, a first inner braided layer and a first inner sheath. The first core wire and the second core wire form a unit. The first core wire, the second core wire, the third core wire, the fourth core wire and the first filling layer are stranded together. And a first wrapping layer is provided outside the first core wire, the second core wire, the third core wire, the fourth core wire and the first filling layer. A first inner braided layer is coated on the outer wall of the first wrapping layer. The first ground wire is arranged between the first wrapping layer and the first inner braided layer. The first inner sheath is coated on the outer wall of the first inner braided layer.

[0008] In an embodiment of the present utility model, the second wire unit includes an inner layer wire, a second filling layer, a plurality of fifth core wires, a second wrapping layer and a second inner sheath. The second wrapping layer is wound around the outer sides of the inner layer wire, the second filling layer and the plurality of fifth core wires. The second inner sheath is wound around the outer side of the second wrapping layer.

[0009] In an embodiment of the present utility model, the inner layer wire includes a second inner braided layer, a third wrapping layer, two sixth core wires, two seventh core wires, two eighth core wires, a ninth core wire, a tenth core wire and a plurality of third filling layers. The two sixth core wires form a unit. The two seventh core wires form a unit. The two eighth core wires form a unit. The two sixth core wires, the two seventh core wires, the two eighth core wires, the ninth core wire, the tenth core wire and the plurality of third filling layers are stranded together. The third wrapping layer is coated outside the two sixth core wires, the two seventh core wires, the two eighth core wires, the ninth core wire, the tenth core wire and the plurality of third filling layers. The second inner braided layer is coated outside the third wrapping layer.

[0010] In an embodiment of the present utility model, a fourth wrapping layer is wound around the outside of the two sixth core wires. A fifth wrapping layer is wound around the outside of the two seventh core wires.

[0011] In an embodiment of the present utility model, a second ground wire is arranged inside the fourth wrapping layer. A third ground wire is arranged inside the fifth wrapping layer.

[0012] In an embodiment of the present utility model, a fourth ground wire is arranged between the second inner braided layer and the third wrapping layer.

[0013] In an embodiment of the present utility model, the first filling layer, the second filling layer and the third filling layer are made of flame-retardant PP ropes.

[0014] In an embodiment of the present utility model, the structures of the first core wire, the second core wire, the third core wire, the fourth core wire, the fifth core wire, the sixth core wire, the seventh core wire, the eighth core wire, the ninth core wire, and the tenth core wire are the same, and the first core wire, the second core wire, the third core wire, the fourth core wire, the fifth core wire, the sixth core wire, the seventh core wire, the eighth core wire, the ninth core wire, and the tenth core wire each include a conductor and an insulating layer, and the insulating layer is coated on the outside of the conductor.

[0015] In an embodiment of the present utility model, the conductor is a type 5 conductor with hot-dip tin annealing.

[0016] In an embodiment of the present utility model, the material of the insulating layer is high-flame-retardant low-smoke polyvinyl chloride.

[0017] The above technical solution of the present utility model has the following beneficial effects compared with the prior art:

[0018] The photovoltaic energy storage flat cable of the present utility model provides a DG photovoltaic energy storage cable that helps to significantly improve the adaptability to high and low temperature environments and fire-retardant environments, thereby avoiding embrittlement due to high and low temperatures and threatening life safety with a large amount of harmful gases generated during a fire. It is beneficial to exhibit excellent fire-retardant, low-smoke performance, oil corrosion resistance, battery liquid corrosion resistance, and ultraviolet resistance, thereby ensuring a long service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to make the content of the present utility model easier to be clearly understood, the following further details the present utility model according to specific embodiments of the present utility model in conjunction with the drawings, where

[0020] Figure 1 is a cross-sectional view of the photovoltaic energy storage flat cable in a preferred embodiment of the present utility model;

[0021] Figure 2 is a cross-sectional view of the first wire unit in a preferred embodiment of the present utility model;

[0022] Figure 3 is a cross-sectional view of the second wire unit in a preferred embodiment of the present utility model.

[0023] Description of the reference numerals in the drawings: outer sheath 1, outer braided layer 2, first conductor unit 3, first core wire 31, conductor 311, insulating layer 312, second core wire 32, third core wire 33, fourth core wire 34, first filling layer 35, first ground wire 36, first wrapping layer 37, first inner braided layer 38, first inner sheath 39, second conductor unit 4, inner conductor 41, second inner braided layer 411, third wrapping layer 412, sixth core wire 413, seventh core wire 414, eighth core wire 415, ninth core wire 416, tenth core wire 417, third filling layer 418, fourth wrapping layer 419, fifth wrapping layer 4110, second ground wire 4111, third ground wire 4112, fourth ground wire 4113, second filling layer 42, several fifth core wires 43, second wrapping layer 44, second inner sheath 45. Detailed implementation manners

[0024] The following further describes the present utility model in conjunction with the drawings and specific embodiments, so that those skilled in the art can better understand the present utility model and be able to implement it, but the embodiments cited do not limit the present utility model.

[0025] Referring to Figure 1 As shown, the photovoltaic energy storage flat cable of the present utility model includes: an outer sheath 1, an outer braided layer 2, a first conductor unit 3 and a second conductor unit 4. The outer braided layer 2 is wound around the outer walls of the first conductor unit 3 and the second conductor unit 4. The outer sheath 1 is sleeved outside the outer braided layer 2. The cross-sections of the outer sheath 1 and the outer braided layer 2 are oval.

[0026] Referring to Figure 2 As shown, the first conductor unit 3 includes a first core wire 31, a second core wire 32, a third core wire 33, a fourth core wire 34, a first filling layer 35, a first ground wire 36, a first wrapping layer 37, a first inner braided layer 38 and a first inner sheath 39. The first core wire 31 and the second core wire 32 form a unit. The first core wire 31, the second core wire 32, the third core wire 33, the fourth core wire 34 and the first filling layer 35 are stranded together. And a first wrapping layer 37 is provided outside the first core wire 31, the second core wire 32, the third core wire 33, the fourth core wire 34 and the first filling layer 35. An inner braided layer 38 is coated on the outer wall of the first wrapping layer 37. The first ground wire 36 is arranged between the first wrapping layer 37 and the inner braided layer 38. The first inner sheath 39 is coated on the outer wall of the inner braided layer 38.

[0027] Referring to Figure 3 As shown, the second conductor unit 4 includes an inner conductor 41, a second filling layer 42, several fifth core wires 43, a second wrapping layer 44 and a second inner sheath 45. The second wrapping layer 44 is wound around the outer sides of the inner conductor 41, the second filling layer 42 and several fifth core wires 43. The second inner sheath 45 is wound around the outer side of the second wrapping layer 44.

[0028] In the above structure, the inner layer wire 41 includes an inner braided layer two 411, a wrapping layer three 412, two core wires six 413, two core wires seven 414, two core wires eight 415, a core wire nine 416, a core wire ten 417, and several filling layers three 418. The two core wires six 413 form a unit, the two core wires seven 414 form a unit, the two core wires eight 415 form a unit. The two core wires six 413, the two core wires seven 414, the two core wires eight 415, the core wire nine 416, the core wire ten 417, and several filling layers three 418 are stranded together. The wrapping layer three 412 is coated on the outside of the two core wires six 413, the two core wires seven 414, the two core wires eight 415, the core wire nine 416, the core wire ten 417, and several filling layers three 418. The inner braided layer two 411 is coated on the outside of the wrapping layer three 412. A wrapping layer four 419 is wound around the outside of the two core wires six 413. A wrapping layer five 4110 is wound around the outside of the two core wires seven 414. A ground wire two 4111 is provided inside the wrapping layer four 419. A ground wire three 4112 is provided inside the wrapping layer five 4110. A ground wire four 4113 is provided between the inner braided layer two 411 and the wrapping layer three 412.

[0029] In the above structure, the filling layer one 35, the filling layer two 42, and the filling layer three 418 are made of flame-retardant PP ropes. The outer sheath 1, the inner sheath one 39, and the inner sheath two 45 are made of specially developed high flame-retardant polyvinyl chloride materials, and thus have excellent abrasion resistance, oil corrosion resistance, ultraviolet resistance, high and low temperature impact resistance. The flame-retardant performance can ensure a long service life.

[0030] In the above structure, the core wire one 31, the core wire two 32, the core wire three 33, the core wire four 34, the core wire five 43, the core wire six 413, the core wire seven 414, the core wire eight 415, the core wire nine 416, and the core wire ten 417 have the same structure. And the core wire one 31, the core wire two 32, the core wire three 33, the core wire four 34, the core wire five 43, the core wire six 413, the core wire seven 414, the core wire eight 415, the core wire nine 416, and the core wire ten 417 all include a conductor 311 and an insulating layer 312. The insulating layer 312 is coated on the outside of the conductor 311. Ground wires and shielding layers can be added outside the insulating layer 312 according to needs to improve the electromagnetic interference resistance of the wire and ensure the electromagnetic compatibility of the cable. A nylon layer is added outside the shielding layer to increase the corrosion resistance and mechanical ability of the shielding layer and improve the low temperature impact resistance.

[0031] In the above structure, the conductor 311 is a type 5 conductor with hot-dip tin annealing, having a smooth surface, no oxidation, burrs, etc. The material of the insulating layer 312 is high flame-retardant low-smoke polyvinyl chloride, having high impact resistance and strong mechanical properties; the high temperature resistance can reach 105 °C, and the flame-retardant performance is excellent.

[0032] Obviously, the above embodiments are merely examples for clear illustration and not limitations on the implementation manners. For those of ordinary skill in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to enumerate all the implementation manners here. And the obvious changes or modifications derived therefrom still fall within the protection scope of the creation of the present utility model.

Claims

1. A flat photovoltaic energy storage cable, characterized in that: Including: An outer sheath, an outer braided layer, a first wire unit, and a second wire unit. The outer braided layer is wound around the outer walls of the first wire unit and the second wire unit. The outer sheath is sleeved outside the outer braided layer. The cross-sections of the outer sheath and the outer braided layer are elliptical. The first wire unit includes a first core wire, a second core wire, a third core wire, a fourth core wire, a first filling layer, a first ground wire, a first wrapping layer, a first inner braided layer, and a first inner sheath. The first core wire and the second core wire form a unit. The first core wire, the second core wire, the third core wire, the fourth core wire, and the first filling layer are stranded together. And an outer first wrapping layer is provided outside the first core wire, the second core wire, the third core wire, the fourth core wire, and the first filling layer. A first inner braided layer is coated on the outer wall of the first wrapping layer. The first ground wire is disposed between the first wrapping layer and the first inner braided layer. The first inner sheath is coated on the outer wall of the first inner braided layer.

2. The flat photovoltaic energy storage cable according to claim 1, wherein: The second wire unit includes an inner layer wire, a second filling layer, a plurality of fifth core wires, a second wrapping layer, and a second inner sheath. The second wrapping layer is wound around the outer sides of the inner layer wire, the second filling layer, and the plurality of fifth core wires. The second inner sheath is wound around the second wrapping layer.

3. The flat photovoltaic energy storage cable according to claim 2, characterized in that: The inner layer wire includes a second inner braided layer, a third wrapping layer, two sixth core wires, two seventh core wires, two eighth core wires, a ninth core wire, a tenth core wire, and a plurality of third filling layers. The two sixth core wires form a unit. The two seventh core wires form a unit. The two eighth core wires form a unit. The two sixth core wires, the two seventh core wires, the two eighth core wires, the ninth core wire, the tenth core wire, and the plurality of third filling layers are stranded together. The third wrapping layer is coated outside the two sixth core wires, the two seventh core wires, the two eighth core wires, the ninth core wire, the tenth core wire, and the plurality of third filling layers. The second inner braided layer is coated outside the third wrapping layer.

4. The flat photovoltaic energy storage cable according to claim 3, characterized in that: An outer fourth wrapping layer is wound around the two sixth core wires. An outer fifth wrapping layer is wound around the two seventh core wires.

5. The flat photovoltaic energy storage cable according to claim 4, characterized in that: A second ground wire is provided inside the fourth wrapping layer. A third ground wire is provided inside the fifth wrapping layer.

6. The flat photovoltaic energy storage cable according to claim 5, characterized in that: A fourth ground wire is provided between the second inner braided layer and the third wrapping layer.

7. The flat photovoltaic energy storage cable according to claim 3, characterized in that: The first filling layer, the second filling layer, and the third filling layer are made of flame-retardant PP ropes.

8. The flat photovoltaic energy storage cable according to claim 3, characterized in that: The first core wire, the second core wire, the third core wire, the fourth core wire, the fifth core wire, the sixth core wire, the seventh core wire, the eighth core wire, the ninth core wire, and the tenth core wire have the same structure. And the first core wire, the second core wire, the third core wire, the fourth core wire, the fifth core wire, the sixth core wire, the seventh core wire, the eighth core wire, the ninth core wire, and the tenth core wire all include a conductor and an insulating layer. The insulating layer is coated outside the conductor.

9. The flat photovoltaic energy storage cable according to claim 8, characterized in that: The conductor is a type 5 conductor with hot-dip tin annealing.

10. The flat photovoltaic energy storage cable according to claim 8 or 9, characterized in that: The material of the insulating layer is high-flame-retardant and low-smoke polyvinyl chloride.

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