Energy storage cable with high voltage resistance

Abstract

The utility model discloses a kind of energy storage cables with high voltage resistance ability, including cable conductor, the cable conductor outside is provided with pressure resistance layer, high temperature resistance layer, is wrapped in the pressure resistance layer outside, the high temperature resistance layer outer layer is wrapped with fireproof layer, skin layer, is wrapped in the fireproof layer outside.The utility model is provided with first insulating layer, protective layer and second insulating layer to form pressure resistance layer, so that the cable conductor when using, with good insulation protection, can normally transmit power under high voltage environment, high temperature resistance layer has higher thermal conductivity, high-temperature-resistant protection is carried out to cable conductor, and electromagnetic shielding can be provided, fireproof layer has the effect of flame-retardant, self-extinguishing, the energy storage cable can be used for a long time under higher temperature, without cracking, aging phenomenon, and avoid the phenomenon that internal insulating layer is punctured, with excellent high voltage resistance performance, safety hazard is greatly reduced, convenient to use.

Description

Technical Field

[0001] This utility model specifically relates to an energy storage cable with strong high voltage withstand capability. Background Technology

[0002] Energy storage cables are cables used in new energy power generation systems such as solar, wind, geothermal, and hydropower for energy storage, transfer, and distribution. They include battery packs, energy storage inverters, AC boundary points, substations, and other related equipment. They are DC-side cables used in power energy storage systems to connect battery modules, battery clusters, combiner boxes, energy storage converters, and other core components. They are key components for the efficient operation of energy storage systems, effectively storing clean energy from unconventional new energy power generation to provide a stable, efficient, and green supply for the energy needs of modern life and industry.

[0003] However, current energy storage cables generate a lot of heat during use. When energy storage cables are in a high-temperature environment for a long time, they are prone to cracking and aging, which can cause the internal cable conductors to malfunction. At the same time, energy storage cables may also experience problems such as the internal insulation layer being broken down due to excessive voltage. Once this happens, it is difficult to repair in time, posing a safety hazard.

[0004] Therefore, it is necessary to invent a high-voltage withstand capability energy storage cable to solve the above problems. Utility Model Content

[0005] (a) Purpose of the utility model

[0006] To address the technical problems existing in the background art, this utility model proposes a high-voltage withstand capability energy storage cable. By incorporating a first insulation layer, a protective layer, and a second insulation layer to form a withstand layer, the cable conductor provides excellent insulation protection while enabling normal power transmission under high-voltage conditions. The high-temperature resistant layer has high thermal conductivity, providing high-temperature protection for the cable conductor and offering electromagnetic shielding. The fireproof layer has flame-retardant and self-extinguishing properties. This energy storage cable can be used for extended periods at high temperatures without cracking or aging, and avoids the breakdown of the internal insulation layer. It exhibits excellent high-voltage withstand performance, significantly reduces safety hazards, and is easy to use.

[0007] (II) Technical Solution

[0008] To achieve the above objectives, this utility model provides the following technical solution: a high-voltage withstand capability energy storage cable, comprising a cable conductor, wherein a voltage-resistant layer is provided on the outer side of the cable conductor;

[0009] A high-temperature resistant layer is wrapped around the outside of the pressure-resistant layer, and a fireproof layer is wrapped around the outer layer of the high-temperature resistant layer.

[0010] The outer skin layer is wrapped around the outside of the fireproof layer;

[0011] The withstand voltage layer includes a first insulating layer wrapped around the outside of the cable conductor, a protective layer wrapped around the outside of the first insulating layer, and a second insulating layer wrapped around the outside of the protective layer.

[0012] Preferably, the first insulating layer is a ceramicized silicone rubber layer.

[0013] Preferably, the protective layer is a fluorophlogopite tape layer.

[0014] Preferably, the second insulating layer is a fusible polytetrafluoroethylene insulating layer.

[0015] Preferably, the high-temperature resistant layer is a woven layer composed of a silicon carbide fiber layer and a nickel-chromium alloy wire layer.

[0016] Preferably, the fireproof layer is a phosphorus-nitrogen-silicon flame-retardant fiber cloth layer.

[0017] Preferably, the outer skin layer is a halogen-free, low-smoke, flame-retardant polyolefin layer.

[0018] Compared with the prior art, the beneficial effects of the above-mentioned technical solution of this utility model are:

[0019] This invention utilizes a first insulation layer, a protective layer, and a second insulation layer, all composed of a ceramicized silicone rubber layer, a fluoromica tape layer, and a fusible polytetrafluoroethylene insulation layer. These layers combine to form a voltage-resistant layer, providing excellent insulation protection while significantly increasing resistance to electrical tracking and breakdown strength. This allows for normal power transmission even under high-voltage conditions. The high-temperature resistant layer, with its high thermal conductivity, provides high-temperature protection for the cable conductor and electromagnetic shielding. Together with the voltage-resistant layer, it ensures uninterrupted power transmission. The fire-retardant layer, made of phosphorus-nitrogen-silicon flame-retardant fiber cloth, offers flame retardancy and self-extinguishing properties, greatly enhancing fire resistance. This energy storage cable can be used for extended periods at high temperatures without cracking or aging, and it avoids the breakdown of the internal insulation layer. It exhibits excellent high-voltage resistance, significantly reducing safety hazards and facilitating use. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0021] Figure 2 This is a cross-sectional view of the present invention;

[0022] Figure 3 This is a schematic diagram of the pressure-resistant layer of this utility model;

[0023] Figure 4This is a schematic diagram of the high-temperature resistant layer of this utility model.

[0024] Explanation of reference numerals in the attached figures:

[0025] 1. Cable conductor, 2. Pressure resistant layer, 21. First insulation layer, 22. Protective layer, 23. Second insulation layer, 3. High temperature resistant layer, 4. Fireproof layer, 5. Outer sheath. Detailed Implementation

[0026] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0027] This utility model provides, for example Figure 1-4 The energy storage cable shown includes a cable conductor 1, and a voltage-resistant layer 2 is provided on the outside of the cable conductor 1.

[0028] A high-temperature resistant layer 3 is wrapped around the outside of the pressure-resistant layer 2, and a fireproof layer 4 is wrapped around the outer layer of the high-temperature resistant layer 3.

[0029] Outer skin layer 5, wrapped around the outside of the fireproof layer 4;

[0030] The pressure-resistant layer 2 includes a first insulating layer 21 wrapped around the outside of the cable conductor 1, a protective layer 22 wrapped around the outside of the first insulating layer 21, and a second insulating layer 23 wrapped around the outside of the protective layer 22.

[0031] In one embodiment, the first insulating layer 21 is a ceramicized silicone rubber layer. The ceramicized silicone rubber layer has good insulation properties and can form a dense inorganic ceramic layer at high temperature, which improves the surface resistance to electrical tracking and breakdown strength, prevents current leakage to the surroundings, thereby ensuring the stability of power transmission and providing good high-voltage protection for the cable conductor 1 it wraps.

[0032] In one embodiment, the protective layer 22 is configured as a fluorophlogopite tape layer, and the interior of the protective layer 22 is filled with nano-alumina particles. By filling the fluorophlogopite tape layer with nano-alumina particles, the uniformity of the electric field can be improved, and the thermal decomposition temperature of the protective layer 22 can be increased to over 600 degrees Celsius, thereby further improving the high voltage resistance of the cable conductor 1 and enabling it to be used normally in high-temperature environments.

[0033] In one embodiment, the second insulation layer 23 is a fusible polytetrafluoroethylene insulation layer, which has good insulation performance, stress resistance performance and crack resistance performance. It can work synergistically with the first insulation layer 21 and the protective layer 22 to improve the insulation performance of the cable conductor 1, so that it can transmit power normally under high voltage environment.

[0034] In one embodiment, the high-temperature resistant layer 3 is a braided layer composed of a silicon carbide fiber layer and a nickel-chromium alloy wire layer. The nickel-chromium alloy wire layer provides electromagnetic shielding to ensure the normal use of the cable conductor 1, while the silicon carbide fiber layer has high thermal conductivity, which can quickly conduct the heat generated by the cable conductor 1, reduce the internal temperature of the second insulation layer 23, and achieve high-temperature protection for the cable conductor 1. At the same time, if the fireproof layer 4 is burned in a large fire, the high-temperature resistant layer 3 can also block external heat, ensuring that the cable conductor 1 is not affected by the fire in the short term, and providing sufficient time for workers to carry out emergency repairs.

[0035] In one embodiment, the fireproof layer 4 is configured as a phosphorus-nitrogen-silicon flame-retardant fiber cloth layer. In the event of a fire, the phosphorus and nitrogen compounds in the phosphorus-nitrogen-silicon flame-retardant fiber cloth layer will release inert gas, namely nitrogen, when heated. Nitrogen is a natural fire-resistant isolation medium and can retard the flame of the outer sheath 5 that has already caught fire. At the same time, the silicone resin in the phosphorus-nitrogen-silicon flame-retardant fiber cloth layer will form a ceramic oxygen barrier layer, namely cerium dioxide-silicon dioxide, which has the function of isolating oxygen and can effectively prevent the fireproof layer 4 from burning. It has beneficial flame-retardant properties. The fireproof layer 4 enables the energy storage cable to have the function of vertical combustion self-extinguishing. Meanwhile, the nickel-chromium alloy wire layer in the high-temperature resistant layer 3 can form a thermal-electrical double shield with the fireproof layer 4. That is, the nickel-chromium alloy wire layer reflects radiant heat, and the ceramic oxygen barrier layer isolates oxygen to achieve flame retardancy. Thus, the cable conductor 1 has beneficial fire-resistant properties when in use.

[0036] In one embodiment, the outer sheath 5 is a halogen-free, low-smoke, flame-retardant polyolefin layer, which is an environmentally friendly polymer material with good bending and aging resistance, and is flexible, durable, and tear-resistant. It can be used in high-temperature environments, providing reliable physical protection and long-term durability for the cable conductor 1.

[0037] The specific implementation method is as follows: In use, this utility model involves wrapping a voltage-resistant layer 2, a high-temperature resistant layer 3, and a fire-resistant layer 4 sequentially around the outside of the cable conductor 1 from the inside out, and finally wrapping an outer sheath layer 5 on the outermost side. This gives the cable conductor 1 excellent high-voltage and high-temperature resistance during use. Specifically:

[0038] The first insulation layer 21, protective layer 22, and second insulation layer 23, prepared by a ceramicized silicone rubber layer, a fluorophlogopite tape layer, and a fusible polytetrafluoroethylene insulation layer, constitute the withstand voltage layer 2. This allows the cable conductor 1 to provide excellent insulation protection during use, while simultaneously forming a dense inorganic ceramic layer on its outer surface, significantly increasing its resistance to electrical tracking and breakdown strength. Furthermore, the fluorophlogopite tape layer ensures a uniform electric field distribution on the outer surface of the cable conductor 1, enabling normal power transmission under high voltage conditions. Additionally, all three layers—the first insulation layer 21, protective layer 22, and second insulation layer 23—possess a certain degree of high voltage resistance. The high-temperature resistance is enhanced from the inside out, and it can work together with the high-temperature resistant layer 3 to protect the cable conductor 1. The high-temperature resistant layer 3, which is made of silicon carbide fiber layer and nickel-chromium alloy wire layer, has high thermal conductivity, provides high-temperature protection for the cable conductor 1, and can provide electromagnetic shielding. Together with the pressure-resistant layer 2, it ensures that the power transmission of the cable conductor 1 is not affected. The fireproof layer 4, made of phosphorus nitrogen silicon flame-retardant fiber cloth layer, has flame-retardant and self-extinguishing effects, greatly improving the fire resistance. The outer sheath layer 5 is set as a halogen-free low-smoke flame-retardant polyolefin layer, which provides reliable physical protection and long-term durability for the cable conductor 1.

[0039] This implementation method specifically addresses the problem that existing energy storage cables generate a large amount of heat during use, and are prone to cracking and aging due to prolonged exposure to high temperatures. This causes the internal cable conductors to malfunction, and the cables may also experience breakdowns of the internal insulation layer due to excessive voltage. Once this occurs, it is difficult to repair in time, posing a safety hazard.

[0040] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used above are only some embodiments recorded in this utility model. Obviously, those skilled in the art can obtain other drawings based on these drawings.

[0041] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A high voltage resistant energy storage cable, characterized by: include: A cable conductor (1) is provided with a pressure-resistant layer (2) on the outside of the cable conductor (1); A high-temperature resistant layer (3) is wrapped around the outside of the pressure resistant layer (2), and a fireproof layer (4) is wrapped around the outside of the high-temperature resistant layer (3). The outer skin layer (5) is wrapped around the outside of the fireproof layer (4); The pressure-resistant layer (2) includes a first insulation layer (21) wrapped around the outside of the cable conductor (1), a protective layer (22) wrapped around the outside of the first insulation layer (21), and a second insulation layer (23) wrapped around the outside of the protective layer (22).

2. The energy storage cable with strong high voltage withstand capability according to claim 1, characterized in that: The first insulating layer (21) is a ceramicized silicone rubber layer.

3. The high voltage resistant energy storage cable of claim 1, wherein: The protective layer (22) is configured as a fluorophlogopite tape layer.

4. The high voltage resistant energy storage cable of claim 1, wherein: The second insulating layer (23) is configured as a fusible polytetrafluoroethylene insulating layer.

5. The high voltage resistant energy storage cable of claim 1, wherein: The high-temperature resistant layer (3) is a woven layer made of silicon carbide fiber layer and nickel-chromium alloy wire layer.

6. The high voltage withstanding energy storage cable according to claim 1, characterized in that: The fireproof layer (4) is configured as a phosphorus-nitrogen-silicon flame-retardant fiber cloth layer.

7. The high voltage withstanding energy storage cable according to claim 1, characterized in that: The outer skin layer (5) is configured as a halogen-free, low-smoke, flame-retardant polyolefin layer.

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