A low-smoke, halogen-free, environmentally friendly cable for small energy storage systems

Abstract

This application discloses a low-smoke, halogen-free, environmentally friendly cable for small energy storage systems, comprising a main conductor core, signal conductors, and a wrapping layer. Several main conductor cores are arranged within the wrapping layer, and a main conductor core insulation layer is provided on the outside of each main conductor core. Several signal conductors are also arranged within the wrapping layer, and a signal conductor insulation layer is provided on the outside of each signal conductor. A signal conductor group sheath is commonly fitted around the multiple signal conductors, and an outer sheath is provided on the outside of the wrapping layer. This application improves the versatility and structural stability of energy storage cables.

Description

Technical Field

[0001] This application relates to the technical field of energy storage cables, and in particular to a low-smoke halogen-free environmentally friendly cable for small energy storage systems. Background Technology

[0002] With the rapid development of energy storage technology in recent years, energy storage cables, as an important component of energy storage systems, have faced increasingly stringent performance requirements. Currently, the main application areas for energy storage cables include residential energy storage, communication base station energy storage, and solar power generation, with backup power for communication base stations accounting for a significant market share. However, existing energy storage cables suffer from several problems, such as limited structure, single function, and insufficient safety, making it difficult to meet diverse application needs. These issues severely restrict the practical application of existing energy storage cables, preventing them from fully realizing their potential and impacting the overall performance and reliability of the energy storage system.

[0003] Currently, energy storage cables on the market are mainly suitable for use in large-scale energy storage projects, connecting batteries in large energy storage battery containers. They are generally single-core cables with high transmission capacity, but these types of energy storage cables cannot meet the needs of small-scale energy storage systems. Although cables for small-scale energy storage systems have excellent electrical performance, aging resistance, and high-temperature resistance, there is still room for improvement in terms of functional versatility, bending resistance, tensile strength, and service life. Utility Model Content

[0004] To improve the versatility and structural stability of energy storage cables, this application provides a low-smoke, halogen-free, environmentally friendly cable for small energy storage systems.

[0005] This application provides a low-smoke, halogen-free, environmentally friendly cable for a small energy storage system, employing the following technical solution: A low-smoke, halogen-free, environmentally friendly cable for a small energy storage system includes a main conductor, signal conductors, and a wrapping layer. Several main conductors are arranged in the wrapping layer, and a main conductor insulation layer is provided on the outside of the main conductors. Several signal conductors are arranged in the wrapping layer, and a signal conductor insulation layer is provided on the outside of the signal conductors. A signal conductor group sheath is commonly wrapped around the outside of the several signal conductors, and an outer sheath is provided on the outside of the wrapping layer.

[0006] By adopting the above technical solution, the main conductor and several signal conductors are coordinated to improve the cable's versatility in application. The outer sheath, located outside the wrapping layer, protects the internal structure and reduces the likelihood of damage to the main conductor and signal conductors during use. The coordination between the main conductor, signal conductors, and the wrapping layer enhances the versatility and structural stability of the energy storage cable.

[0007] Optionally, the signal line insulation layer, outer sheath, and main core insulation layer are all made of halogen-free flame-retardant polyolefin material.

[0008] By adopting the above technical solutions, halogen-free flame-retardant polyolefin materials reduce the possibility of releasing large amounts of smoke and toxic gases during combustion, greatly improving the safety of cables and reducing the threat of cables to human health and safety.

[0009] Optionally, the twist ratio between some of the signal line conductors is ≤8, and the twist ratio between the signal line conductor and the main core conductor is ≤10.

[0010] By adopting the above technical solution and controlling the twisting ratio between several signal conductors and the main conductor, the flexibility and bending resistance of the cable are improved, making the installation and use of the cable more convenient, while also meeting the environmental requirements for the minimum bending radius of the cable.

[0011] Optionally, the wrapping layer is provided with a plurality of tensile filler ropes.

[0012] By adopting the above technical solution, the tensile filler rope is set in the wrapping layer to distribute the tensile force on the cable during use, thereby reducing the possibility of breakage of the signal line conductor and the main core conductor when subjected to tension.

[0013] Optionally, the wrapping layer is filled with a filler material for filling gaps.

[0014] By adopting the above technical solution, the filler is placed in the gap inside the wrapping layer to absorb the stress generated when the cable is bent, which helps to further extend the service life of the cable.

[0015] Optionally, a copper wire shielding layer is provided on the inner wall of the signal line group sheath. The copper wire shielding layer includes a loosely braided copper mesh and a shielding aluminum foil layer. The shielding aluminum foil layer is connected to the outside of the loosely braided copper mesh, and the outer wall of the shielding aluminum foil layer is connected to the inner wall of the signal line group sheath.

[0016] By adopting the above technical solution, and combining the loosely braided copper mesh with the flexible shielding aluminum foil layer material, the shielding effect on the signal line conductor is guaranteed, while taking into account the flexibility of the copper wire shielding layer, which facilitates cable bending and also helps to extend the service life of the cable.

[0017] Optionally, the outer protective sleeve includes an inner protective sleeve and an outer protective sleeve. The outer protective sleeve is coaxially disposed outside the inner protective sleeve. The outer diameter of the inner protective sleeve is smaller than the inner diameter of the outer protective sleeve. A plurality of first elastic support strips are connected to the outer wall of the inner protective sleeve, and a plurality of second elastic support strips are connected to the inner ring wall of the outer protective sleeve. The first elastic support strips abut against the inner wall of the outer protective sleeve, and the second elastic support strips abut against the outer wall of the inner protective sleeve.

[0018] By adopting the above technical solution, an annular cavity is provided between the inner protective sleeve and the outer protective sleeve. The first elastic support strip and the second elastic support strip provide elastic support for the annular cavity, which helps to reduce the possibility of damage to the structure in the outer protective sleeve when subjected to impact.

[0019] Optionally, a plurality of connecting strips connect the inner protective sleeve and the outer protective sleeve.

[0020] By adopting the above technical solution, the connecting strip ensures that the inner protective sleeve and the outer protective sleeve remain relatively stationary, reducing the possibility of relative displacement and sliding friction between them.

[0021] In summary, this application includes at least one of the following beneficial technical effects: 1. Through the cooperation of the main conductor, signal conductor, and wrapping layer, the energy storage cable can be used more versatilely and its structural stability can be improved. 2. The tensile filler cord reduces the possibility of signal line conductors and main conductor cores breaking under tension; 3. The first and second elastic support bars provide elastic support to the annular cavity, which helps to reduce the possibility of damage to the structure in the outer sheath when subjected to impact. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of a low-smoke halogen-free environmentally friendly cable for a small energy storage system, as shown in Embodiment 1 of this application.

[0023] Figure 2 yes Figure 1 Enlarged view of part A in the middle.

[0024] Figure 3 This is a schematic diagram of the structure of a low-smoke halogen-free environmentally friendly cable for a small energy storage system, as shown in Embodiment 2 of this application.

[0025] Explanation of reference numerals in the attached diagram: 1. Main conductor core; 2. Signal conductor core; 3. Tensile filler rope; 4. Outer sheath; 41. Inner protective sheath; 42. Outer protective sheath; 5. Main conductor core insulation layer; 6. Signal conductor insulation layer; 7. Wrapping layer; 8. Filler material; 9. First elastic support bar; 10. Second elastic support bar; 11. Connecting bar; 12. Copper wire braided shielding layer; 121. Loosely braided copper mesh; 122. Shielding aluminum foil layer; 13. Signal line assembly sheath. Detailed Implementation

[0026] The following is in conjunction with the appendix Figure 1-3 This application provides a further detailed description. Embodiments of this application provide a low-smoke, halogen-free, environmentally friendly cable for small-scale energy storage systems, which improves the versatility of energy storage cable applications and structural stability.

[0027] Example 1 Reference Figure 1 A low-smoke halogen-free environmentally friendly cable for a small energy storage system includes a main conductor 1, a signal conductor 2, a tensile filler rope 3, and an outer sheath 4. Several main conductors 1 are arranged inside the outer sheath 4, and a main conductor insulation layer 5 is provided on the outside of the main conductors 1. Several signal conductors 2 are arranged inside the outer sheath 4, and a signal conductor insulation layer 6 is provided on the outside of the signal conductors 2.

[0028] Reference Figure 1 and Figure 2 A signal line group sheath 13 is commonly provided on the outside of several signal line conductors 2. A copper wire braided shielding layer 12 is provided on the inner wall of the signal line group sheath 13. The copper wire braided shielding layer 12 includes a loosely braided copper mesh 121 and a shielding aluminum foil layer 122 provided on its outside. The shielding aluminum foil layer 122 is connected to the inner ring wall of the signal line group sheath 7.

[0029] Reference Figure 1 The outer sheath 4 has a wrapping layer 7 on its inner ring wall. Several tensile filler ropes 3 are arranged inside the wrapping layer 7. The tensile filler ropes 3 are made of materials including, but not limited to, aramid fiber and steel wire. The wrapping layer 7 contains filler material 8 for filling gaps; in this embodiment, the filler material 8 is foamed PE material. The outer sheath 4, signal line insulation layer 6, and main core insulation layer 5 are all made of halogen-free flame-retardant polyolefin material. The twist ratio between several signal line conductors 2 is less than or equal to 8, and the twist ratio between the signal line conductor 2 and the main core conductor 1 is less than or equal to 10.

[0030] Reference Figure 1 and Figure 2By housing the main conductor 1 and several signal conductors 2 within the outer sheath 4, multi-core cabling of the cable is achieved. This solves the problem of the single structure in existing energy storage cables, meets the diverse application needs of cables, and expands the application range of the cable. Since the outer sheath 4, signal line insulation layer 6, and main conductor insulation layer 5 are all made of halogen-free flame-retardant polyolefin material, the possibility of releasing large amounts of smoke and toxic gases during cable combustion is effectively reduced, improving cable safety and reducing harm to the human body. Furthermore, it enhances the cable's flame-retardant properties and heat resistance, enabling the cable to maintain stable performance even in high-temperature environments, making it suitable for more demanding application scenarios and meeting the performance requirements of modern energy storage systems.

[0031] Reference Figure 1 In this embodiment, the cable core adopts a small-pitch design. By controlling the twisting ratio between several signal conductors 2 and between the signal conductors 2 and the main conductor 1, the cable's flexibility and bending resistance are improved, making it easier for operators to install and use the cable. In addition, it also meets the environmental requirement that the cable's minimum bending radius is ≥4D.

[0032] Reference Figure 1 and Figure 2 The tensile filler rope 3 distributes the tensile force when the cable is stretched, reducing the possibility of breakage of the main conductor 1 and signal conductor 2 during tension, thus helping to extend the cable's service life. The filler 8 absorbs the bending stress generated when the cable is bent, further improving the cable's bending resistance. The loosely braided copper mesh 121 and the shielding aluminum foil layer 122 work together to ensure stable shielding of the signal conductor 2 while also taking into account the cable's flexibility, facilitating cable bending.

[0033] The implementation principle of the low-smoke halogen-free environmentally friendly cable for a small energy storage system in Embodiment 1 of this application is as follows: the main conductor 1 and several signal conductors 2 are jointly housed in the outer sheath 4, realizing multi-core wiring of the cable, solving the problem of the single structure of existing energy storage cables, and meeting the diverse application needs of cables. The halogen-free flame-retardant polyolefin material reduces the possibility of the cable releasing a large amount of smoke and toxic gases during the heating and combustion process.

[0034] The cable core adopts a small-pitch design, which improves the cable's flexibility and bending resistance, and also meets the minimum bending radius requirement. The loosely braided copper mesh 121 and the shielding aluminum foil layer 122 work together to ensure stable shielding of the signal conductor 2 while also taking into account the cable's flexibility, making it easy to bend the cable.

[0035] Example 2 Reference Figure 3 The difference between Embodiment 2 and Embodiment 1 is that the outer protective sleeve 4 includes an inner protective sleeve 41 and an outer protective sleeve 42. The outer protective sleeve 42 is coaxially disposed outside the inner protective sleeve 41, and the inner diameter of the outer protective sleeve 42 is larger than the outer diameter of the inner protective sleeve 41. A plurality of first elastic support strips 9 are provided on the outer annular wall of the inner protective sleeve 41, and a plurality of second elastic support strips 10 are provided on the inner annular wall of the outer protective sleeve 42. The plurality of first elastic support strips 9 and the plurality of second elastic support strips 10 are spaced apart in the annular cavity between the inner protective sleeve 41 and the outer protective sleeve 42. The first elastic support strips 9 abut against the inner wall of the outer protective sleeve 42, and the second elastic support strips 10 abut against the outer wall of the inner protective sleeve 41. A plurality of connecting strips 11 connect the inner protective sleeve 41 and the outer protective sleeve 42 along the radial direction.

[0036] The implementation principle of a low-smoke halogen-free environmentally friendly cable for a small energy storage system in Embodiment 2 of this application is as follows: the first elastic support bar 9 and the second elastic support bar 10 between the inner protective sheath 41 and the outer protective sheath 42 support the annular cavity, reducing the possibility of damage to the internal structure of the outer sheath 4 when the cable is subjected to impact, and helping to extend the service life of the cable.

[0037] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A low-smoke, halogen-free, environmentally friendly cable for a small energy storage system, characterized in that: The system includes a main conductor (1), a signal conductor (2), and a wrapping layer (7). Several main conductors (1) are provided in the wrapping layer (7). A main conductor insulation layer (5) is provided on the outside of the main conductors (1). Several signal conductors (2) are provided in the wrapping layer (7). A signal conductor insulation layer (6) is provided on the outside of the signal conductors (2). A signal line group wrapping layer (13) is provided on the outside of several of the signal conductors (2). An outer sheath (4) is provided on the outside of the wrapping layer (7). A copper wire shielding layer is provided on the inner wall of the signal line group wrapping layer (13). The copper wire shielding layer includes a loosely braided copper mesh (121) and a shielding aluminum foil layer (122). The shielding aluminum foil layer (122) is connected to the outside of the loosely braided copper mesh (121). The outer wall of the shielding aluminum foil layer (122) is connected to the inner wall of the signal line group wrapping layer (13).

2. The low-smoke halogen-free environmentally friendly cable for a small energy storage system according to claim 1, characterized in that: The signal line insulation layer (6), outer sheath (4), and main core insulation layer (5) are all made of halogen-free flame-retardant polyolefin material.

3. The low-smoke halogen-free environmentally friendly cable for a small energy storage system according to claim 1, characterized in that: The twisting ratio between several of the signal line conductors (2) is ≤8, and the twisting ratio between the signal line conductors (2) and the main core conductor (1) is ≤10.

4. The low-smoke halogen-free environmentally friendly cable for a small energy storage system according to claim 1, characterized in that: The wrapping layer (7) is provided with several tensile filler ropes (3).

5. The low-smoke halogen-free environmentally friendly cable for a small energy storage system according to claim 4, characterized in that: The wrapping layer (7) is filled with filler material (8) for filling gaps.

6. The low-smoke halogen-free environmentally friendly cable for a small energy storage system according to claim 1, characterized in that: The outer sheath (4) includes an inner protective sheath (41) and an outer protective sheath (42). The outer protective sheath (42) is coaxially disposed outside the inner protective sheath (41). The outer diameter of the inner protective sheath (41) is smaller than the inner diameter of the outer protective sheath (42). The outer wall of the inner protective sheath (41) is connected with a plurality of first elastic support strips (9). The inner ring wall of the outer protective sheath (42) is connected with a plurality of second elastic support strips (10). The first elastic support strips (9) abut against the inner wall of the outer protective sheath (42), and the second elastic support strips (10) abut against the outer wall of the inner protective sheath (41).

7. The low-smoke halogen-free environmentally friendly cable for a small energy storage system according to claim 6, characterized in that: A plurality of connecting strips (11) connect the inner protective sleeve (41) and the outer protective sleeve (42).

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