Energy storage cable

Abstract

The utility model provides an energy storage cable, which comprises a fifth kind of soft copper conductor, the conductor adopts a bunch-stranding structure, bunching and compound stranding of the conductor adopt same-direction stranding, the outer side of the conductor is sequentially coated with an inner insulation and a covering layer from inside to outside, the flexibility of the inner insulation is greater than that of the outer insulation, and the covering layer is coated with a covering layer. And the inner insulation is a polyester film adopting a belting process. According to the energy storage cable, the fifth soft copper conductor is adopted and is formed by bunching and twisting soft round copper wires, the twisting direction of bunching and compound twisting of the conductor is further limited, the bending performance and the flexible performance of the cable can be guaranteed, the conductor is coated with the inner insulation layer of the polyester film, the inner insulation layer can resist high temperature, and it is guaranteed that the inner insulation layer is not melted in the extrusion process of the covering layer; by combining the internal insulation of the belting process and the covering layer formed by extrusion, the production cost is reduced while the performance of the cable is ensured, and the internal insulation with relatively high flexibility can prevent the conductor from being exposed when the covering layer is damaged, so that the safety of the cable is ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to cable technical field especially relates to a kind of energy storage cables for clean new energy. BACKGROUND

[0002] The development of wind power and photovoltaic industry promotes the development of large-capacity energy storage industry, and energy storage technology is the core of new energy industry revolution. Energy storage technology can solve the randomness and volatility of new energy generation to a large extent, realize the smooth output of new energy generation, and effectively adjust the changes of grid voltage, frequency and phase caused by new energy generation. Large-scale wind power and photovoltaic power generation can be conveniently and reliably integrated into conventional power grid. Energy storage cable is one of the necessary hardware for energy storage technology.

[0003] However, the existing energy storage cable has the following problems in use: the bending performance and softness of the energy storage cable are not good, which is not convenient for bending and installation, and cannot be applied to different use scenarios. In addition, the conductor is easily exposed after the outer layer of the energy storage cable is damaged, which reduces the safety of the cable.

[0004] In order to solve the above problems, the utility model provides an energy storage cable which is convenient to bend and has high safety. UTILITY MODEL CONTENT

[0005] In order to solve the above problems of the existing energy storage cable, the utility model provides an energy storage cable.

[0006] According to one object of the utility model, the utility model provides an energy storage cable, which comprises a fifth soft copper conductor. The conductor adopts a bundle twisting structure. The bundle wire and the complex twisting of the conductor are both left-handed and twisted in the same direction. The outer side of the conductor is sequentially covered with an inner insulation and a covering layer from inside to outside. The flexibility of the inner insulation is greater than that of the outer insulation. The inner insulation is a polyester film using a tape wrapping process. The covering layer is extrusion formed. The melting temperature of the inner insulation is higher than the extrusion temperature of the covering layer.

[0007] Preferably, the bundle wire and the complex twisting of the conductor are both left-handed and twisted in the same direction.

[0008] Preferably, the covering layer comprises an outer insulation and a sheath which are sequentially covered on the outer side of the inner insulation. The outer insulation and the sheath are both extrusion formed.

[0009] Preferably, the outer insulation and the sheath are both low-smoke halogen-free flame-retardant polyolefin materials subjected to irradiation crosslinking.

[0010] Preferably, the outer insulation and the sheath are both low-smoke halogen-free flame-retardant heat-resistant 125℃ irradiation crosslinking polyolefin materials.

[0011] Preferably, the heat resistance temperature of the sheath and the heat resistance temperature of the outer insulation are both not less than 125 DEG.

[0012] Preferably, the inner insulation is a polyester film insulation tape, which is wrapped around the outer side of the conductor.

[0013] Preferably, a waterproof layer is arranged between the outer insulation and the sheath.

[0014] Preferably, an aluminum-plastic composite tape is longitudinally wrapped outside the outer insulation to form the waterproof layer.

[0015] Preferably, the longitudinally wrapped aluminum-plastic composite tape and the extruded sheath are simultaneously formed.

[0016] Compared with the prior art, the utility model has the beneficial effects that:

[0017] The energy storage cable adopts the fifth soft copper conductor which is composed of soft round copper wire bundles and twists, further limits the twisting direction of the conductor bundle and the complex twist, can guarantee the bending performance and soft performance of the cable, wraps the inner insulation of polyester film outside the conductor, and the inner insulation can resist high temperature, guarantees not to melt in the extrusion process of the covering layer, combines the inner insulation of the tape wrapping process and the covering layer of the extrusion forming, guarantees the cable performance while reducing the production cost, the inner insulation with high flexibility can avoid the conductor exposure when the covering layer is damaged, guarantees the safety of the cable.

[0018] The utility model is further described below in combination with the drawings and examples. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is a radial section schematic view of the energy storage cable. DETAILED DESCRIPTION

[0020] The following description is used to explain the utility model in detail so that the person skilled in the art can realize the utility model. The preferred embodiments in the following description are only as examples, and other obvious variants can be thought of by the person skilled in the art. The basic principles of the utility model defined in the following description can be applied to other implementation schemes, variant schemes, improved schemes, equivalent schemes and other technical schemes without departing from the spirit and scope of the utility model.

[0021] Please refer to Figure 1The utility model provides a technical scheme: a kind of energy storage cable, including the 5th soft copper conductor 100, the conductor 100 adopts bundle structure, the conductor 100's bundle and complex twist are all adopted same direction stranding, the conductor 100 is successively coated with inner insulation 200 and covering layer 300 from inside to outside by outside, the flexibility of the inner insulation 200 is greater than the flexibility of outer insulation 301, the inner insulation 200 is the polyester film using tape-wrapping process, the covering layer 300 is extrusion coating forming covering layer 300, the melting temperature of the inner insulation 200 is higher than the extrusion temperature of the covering layer 300.

[0022] The energy storage cable adopts the 5th soft copper conductor 100, which is composed of soft round copper wire bundle and stranding, further limits the stranding direction of the conductor 100 bundle and complex twist, can ensure the bending performance and soft performance of the cable, the inner insulation 200 of polyester film is coated outside the conductor 100, and the inner insulation 200 can resist high temperature, ensure that it is not melted during the extrusion of the covering layer 300, by combining the inner insulation 200 of tape-wrapping process and the extrusion coating forming covering layer 300, the performance of the cable is ensured while the production cost is reduced, the inner insulation 200 with higher flexibility can avoid the exposure of the conductor 100 when the covering layer 300 is damaged, and the safety of the cable is ensured.

[0023] It should be noted that the 5th soft copper conductor is referred to as 5-type conductor, which is a kind of conductor material widely used in wire and cable manufacturing, the 5th soft copper conductor is a conductor composed of soft round copper wire bundle and stranding, mainly used in electrical conductors, wires, cables and other fields, the 5-type conductor has the characteristics of softness and easy bending, the overall structure is soft and easy to bend, can meet the complex and variable wiring requirements, and the purity of soft copper is relatively high, contains a small amount of impurities, and the crystal grain is small, so it has good electrical conductivity, ensures the stability and efficiency of current transmission.

[0024] Further, the bundle and complex twist of the conductor 100 are all left-handed same direction stranding.

[0025] Further, the covering layer 300 includes outer insulation 301 and sheath 302 successively coated outside the inner insulation 200, the outer insulation 301 and the sheath 302 are both extrusion coating, which is a process of uniformly extruding molten material on the wire through an extruder, which can form a continuous and uniform layered piece with good electrical and mechanical properties.

[0026] Further, the outer insulation 301 and the sheath 302 are both made of low-smoke halogen-free flame-retardant polyolefin material which is irradiation cross-linked. By limiting the material and processing technology of the outer insulation 301 and the sheath 302, the cable has excellent UV resistance, cold resistance, heat resistance and chemical corrosion resistance, and has the properties of moisture resistance and high and low temperature resistance, so as to ensure that the cable can operate stably for a long time in various environments and prolong the service life. As a preferred, the outer insulation 301 and the sheath 302 are both made of low-smoke halogen-free flame-retardant heat-resistant 125℃ irradiation cross-linked polyolefin material, and further, the heat-resistant temperature of the sheath 302 and the heat-resistant temperature of the outer insulation 301 are both not less than 125°. Preferably, the heat-resistant temperature of the sheath 302 and the heat-resistant temperature of the outer insulation 301 are both 125°, that is, the outer insulation 301 and the sheath 302 using irradiation technology have excellent electrical properties and high temperature resistance, and the temperature can reach 125℃ during normal operation. It should be noted that irradiation cross-linking is a technology for cross-linking treatment of cable materials. This technology uses high-energy electron beams or gamma rays to irradiate the cable materials, so that the molecular structure changes, thereby enhancing the material properties. The irradiated cable material has the properties of high temperature resistance, heat aging resistance, chemical corrosion resistance, and ultraviolet resistance, and has stronger durability and safety and reliability.

[0027] The irradiation cross-linked flame-retardant polyolefin has excellent mechanical and physical properties, good environmental stress cracking resistance, excellent wear resistance, resistance to various chemical solvents, and is relatively stable in various corrosive media. The irradiation cross-linked flame-retardant polyolefin has a maximum rated temperature of 125℃ during long-term operation, does not release corrosive and toxic gases during combustion, does not cause secondary hazards, meets modern fire safety requirements, is a new environmentally friendly product, and is conducive to the use of energy storage cables.

[0028] Further, the inner insulation 200 is a polyester film insulation tape, which is wrapped around the outside of the conductor 100, and the polyester film can withstand high temperature to ensure that it does not melt during the extrusion of the covering layer 300.

[0029] Further, a waterproof layer 400 is arranged between the outer insulation 301 and the sheath 302, and the aluminum-plastic composite tape is longitudinally wrapped outside the outer insulation 301 to form the waterproof layer 400. By adding the waterproof layer 400, the cable has excellent waterproof performance, can effectively prevent moisture from penetrating into the cable, improve the insulation performance and reliability of the cable, and prolong the service life. Further, the waterproof layer 400 and the extruded sheath 302 are simultaneously formed. The waterproof layer 400 can effectively prevent moisture from penetrating into the cable, improve the insulation performance and reliability of the cable, can withstand the extreme climate influence of sunlight, rainwater, snowwater and other natural environments, maintain stable electrical performance, prolong the service life, and the simultaneously formed waterproof layer 400 and sheath 302 can ensure the close combination between the waterproof layer 400 and the sheath 302, reduce the gaps and loopholes caused by improper operation or material difference, thereby improving the waterproof performance of the cable, and in addition, the close combination of the waterproof layer 400 and the sheath 302 can also enhance the overall flexibility of the cable and improve the tensile resistance, extrusion resistance and other performances of the cable.

[0030] In summary, the energy storage cable has excellent ultraviolet resistance, cold resistance, heat resistance and chemical corrosion resistance, the cable has moisture resistance and high and low temperature resistance, the cable has good waterproof performance, can effectively prevent moisture from penetrating into the cable, improve the insulation performance and reliability of the cable, which is particularly important for cables used in humid, rainy and high-humidity environments, the cable can withstand the extreme climate influence of sunlight, rainwater, snowwater and other natural environments, maintain stable electrical performance, and prolong the service life.

[0031] The energy storage cable has the following advantages:

[0032] 1. The conductor 100 adopts the 5th annealed soft copper conductor 100, and the bundle wire and the complex strand are both left-handed and homodromous stranded, so that the bending performance and softness of the cable are ensured, and a layer of polyester film insulation tape is wrapped outside the wire, and the polyester film is required to be high-temperature resistant to ensure that it does not melt during the extrusion of the covering layer 300;

[0033] 2. The inner insulation 200 adopts low-smoke halogen-free flame-retardant heat-resistant 125℃ radiation cross-linked polyolefin material, so that it has excellent electrical performance and high-temperature resistance, and the temperature can reach 125℃ during normal operation;

[0034] 3. An aluminum-plastic composite tape is longitudinally wrapped when the sheath 302 is extruded, so that it has excellent waterproof performance, can effectively prevent moisture from penetrating into the cable, improve the insulation performance and reliability of the cable, and prolong the service life;

[0035] 4. The sheath 302 adopts low-smoke halogen-free flame-retardant heat-resistant 125℃ radiation cross-linked polyolefin material, so that it has excellent ultraviolet resistance, cold resistance, heat resistance and chemical corrosion resistance, and the cable has moisture resistance and high and low temperature resistance and the like.

[0036] The above-described embodiments are only used for illustrating the technical ideas and characteristics of the present application, and the purpose is to enable those skilled in the art to understand the content of the present application and to implement it, and the present embodiment cannot be used to limit the patent application range of the present application, that is, any equivalent changes or modifications made according to the spirit disclosed in the present application still fall within the patent range of the present application.

Claims

1. An energy storage cable, characterized by The fifth kind of soft copper conductor (100) is adopted, the conductor (100) adopts bundle and twist structure, the bundle and the compound of the conductor (100) are all adopted in the same direction, the outer side of the conductor (100) is sequentially covered with inner insulation (200) and covering layer (300), the flexibility of the inner insulation (200) is greater than that of the outer insulation (301), the inner insulation (200) is polyester film adopting tape winding process, the covering layer (300) is extrusion molding, the melting temperature of the inner insulation (200) is higher than the extrusion temperature of the covering layer (300).

2. An energy storage cable according to claim 1, characterized in that The bundle and the compound of the conductor (100) are all adopted in the left direction.

3. An energy storage cable according to claim 1, characterized in that The covering layer (300) includes outer insulation (301) and sheath (302) sequentially covered on the outer side of the inner insulation (200), and the outer insulation (301) and the sheath (302) are both extrusion molding.

4. An energy storage cable according to claim 3, characterized in that The outer insulation (301) and the sheath (302) are both low smoke halogen-free flame-retardant polyolefin materials irradiated and crosslinked.

5. An energy storage cable according to claim 4, characterized in that The outer insulation (301) and the sheath (302) are both low smoke halogen-free flame-retardant heat-resistant 125℃ irradiated and crosslinked polyolefin materials.

6. An energy storage cable according to claim 4, characterized in that The heat-resistant temperature of the sheath (302) and the heat-resistant temperature of the outer insulation (301) are both not less than 125°.

7. An energy storage cable according to claim 1, characterized in that The inner insulation (200) is polyester film insulation tape, and the polyester film insulation tape is wrapped on the outer side of the conductor (100).

8. An energy storage cable according to claim 3, characterized in that A waterproof layer (400) is further arranged between the outer insulation (301) and the sheath (302).

9. An energy storage cable according to claim 8, characterized in that An aluminum plastic composite tape is longitudinally wrapped on the outer side of the outer insulation (301) to form the waterproof layer (400).

10. An energy storage cable according to claim 9, characterized in that The longitudinally wrapped aluminum plastic composite tape and the extrusion sheath (302) are simultaneously formed.

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