Energy storage cable

Abstract

The utility model discloses an energy storage cable, which belongs to the field of cables, and is characterized in that through the arrangement of annular aluminum alloy radiating fins 41 and phase change fillers 42, the temperature rise is reduced by utilizing the active heat dissipation of the annular aluminum alloy radiating fins 41 and the phase change heat absorption of the phase change fillers 42, the energy storage cable has a good heat dissipation effect, and the problems in the prior art can be solved. The energy storage cable provided by the utility model comprises a cable core 1, an insulating layer 2, a shielding layer 3, a heat dissipation channel layer 4, a reinforcing layer 5 and an outer sheath layer 6 which are arranged in sequence, the cable core 1 is formed by twisting anaerobic copper wires or silver-plated copper wires; the heat dissipation channel layer 4 comprises annular aluminum alloy heat dissipation fins 41 which are arranged at intervals in the axial direction of the cable and phase change fillers 42 which are filled among the annular aluminum alloy heat dissipation fins 41, and the phase change fillers 42 are made of paraffin-based phase change materials.

Description

Technical Field

[0001] This utility model relates to the field of cables, and in particular to an energy storage cable. Background Technology

[0002] Energy storage cables are cables specifically designed for energy storage systems, primarily used for DC-side connections between battery clusters and between battery clusters and inverters. Energy storage cables play a crucial role in energy storage systems and are an essential component of these systems.

[0003] In actual use, energy storage cables often face high current conditions. Under these conditions, the temperature rise of energy storage cables is very significant, making the cables more prone to insulation aging and posing a certain fire hazard. However, existing energy storage cables do not have a special design for heat dissipation.

[0004] Therefore, in view of the above situation, how to improve the existing cables to solve the above-mentioned shortcomings has become an important technical problem that needs to be solved by those skilled in the art. Utility Model Content

[0005] This utility model discloses an energy storage cable. By setting an annular aluminum alloy heat dissipation fin 41 and a phase change filler 42, the temperature rise is reduced by the active heat dissipation of the annular aluminum alloy heat dissipation fin 41 and the phase change heat absorption of the phase change filler 42, which has a good heat dissipation effect and can solve the problems existing in the prior art.

[0006] The energy storage cable provided by this utility model includes a cable core 1, an insulation layer 2, a shielding layer 3, a heat dissipation channel layer 4, a reinforcing layer 5, and an outer sheath layer 6 arranged in sequence.

[0007] Cable core 1 is made of oxygen-free copper wire or silver-plated copper wire twisted together;

[0008] The heat dissipation channel layer 4 includes annular aluminum alloy heat dissipation fins 41 spaced apart along the cable axis, and phase change filler 42 filled between the annular aluminum alloy heat dissipation fins 41, wherein the phase change filler 42 is made of paraffin-based phase change material.

[0009] Preferred,

[0010] Cable core 1 is made of silver-plated copper wire with a diameter of 0.15 to 0.3 mm, twisted in a 7×19 pattern;

[0011] The surface of the silver-plated copper wire is coated with a nano-alumina coating.

[0012] Preferred,

[0013] The insulation layer 2 is a double-layer co-extruded XLPE, wherein the inner layer is extruded with high-density XLPE and the outer layer is extruded with thermally conductive XLPE containing 10% to 16% boron nitride.

[0014] Preferably,

[0015] The shielding layer 3 is a tinned copper wire braided mesh with 40° oblique winding.

[0016] Preferably,

[0017] The reinforcing layer 5 is a composite structure of aramid fiber braided mesh and galvanized steel wire spiral armor.

[0018] Preferably,

[0019] The outer sheath layer 6 is made of weather-resistant polyurethane material.

[0020] Preferably,

[0021] The thickness of the outer sheath layer 6 is not less than 2.5mm;

[0022] The surface of the outer sheath layer 6 is provided with a wave-shaped groove.

[0023] Preferably,

[0024] The filling layer 7 is further provided between the cable core 1 and the insulating layer 2, wherein the filling layer 7 is made of flame-retardant rock wool rope.

[0025] Preferably,

[0026] The fireproof layer 8 is further provided between the heat dissipation channel layer 4 and the reinforcing layer 5.

[0027] The fireproof layer 8 comprises, from inside to outside, a heat-resistant sublayer 81, a heat-insulating sublayer 82, a first flame-retardant sublayer 83 and a second flame-retardant sublayer 84.

[0028] Preferably,

[0029] The heat-resistant sublayer 81, the heat-insulating sublayer 82, the first flame-retardant sublayer 83 and the second flame-retardant sublayer 84 are respectively made of mica tape, asbestos material, rock wool rope and halogen-free flame retardant.

[0030] The energy storage cable of the utility model, comprising the cable core 1, the insulating layer 2, the shielding layer 3, the heat dissipation channel layer 4, the reinforcing layer 5 and the outer sheath layer 6 that are sequentially provided, the cable core 1 is twisted by oxygen-free copper wire or silver-plated copper wire, the heat dissipation channel layer 4 comprises annular aluminum alloy heat dissipation fins 41 that are arranged at intervals along the cable axial direction and phase change filler 42 filled between the annular aluminum alloy heat dissipation fins 41, wherein the phase change filler 42 is made of paraffin-based phase change material, through the arrangement of the annular aluminum alloy heat dissipation fins 41 and the phase change filler 42, the energy storage cable of the utility model utilizes the active heat dissipation of the annular aluminum alloy heat dissipation fins 41 and the phase change heat absorption of the phase change filler 42 to reduce temperature rise, has good heat dissipation effect and can solve the problems existing in the prior art. BRIEF DESCRIPTION OF DRAWINGS

[0031] In order to more clearly illustrate the technical scheme in the embodiments of the present application, the drawings needed to be used in the embodiment description will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative effort on the basis of these drawings.

[0032] Fig. 1 The structure diagram of the energy storage cable embodiment of the present application is shown in the figure.

[0033] Fig. 2 The structure diagram of the heat dissipation channel layer 4 in the energy storage cable embodiment of the present application is shown in the figure.

[0034] Fig. 3 The structure diagram of the energy storage cable embodiment of the present application after adding the fireproof layer 8 is shown in the figure. DETAILED DESCRIPTION

[0035] The present application discloses an energy storage cable, which is provided with annular aluminum alloy heat dissipation fins 41 and phase change fillers 42, and utilizes the active heat dissipation of the annular aluminum alloy heat dissipation fins 41 and the phase change heat absorption of the phase change fillers 42 to reduce temperature rise, so as to have good heat dissipation effect and solve the problems existing in the prior art.

[0036] The technical scheme in the embodiments of the present application will be described clearly and in detail in combination with the drawings of the embodiments of the present application. Obviously, the described embodiments are only some embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without any creative effort fall within the scope of protection of the present application. Please refer to Figs. 1 to 3 The energy storage cable provided by the embodiments of the present application comprises a cable core 1, an insulation layer 2, a shielding layer 3, a heat dissipation channel layer 4, a reinforcing layer 5 and an outer sheath layer 6 arranged in sequence.

[0037] The cable core 1 is twisted by oxygen-free copper wires or silver-plated copper wires.

[0038] The heat dissipation channel layer 4 comprises annular aluminum alloy heat dissipation fins 41 arranged at intervals along the axial direction of the cable, and phase change fillers 42 filled between the annular aluminum alloy heat dissipation fins 41, wherein the phase change fillers 42 are made of paraffin-based phase change materials.

[0039] In the embodiment of the utility model, annular aluminum alloy radiating fin 41 is fixed outside insulating layer 2, the heat generated by cable core 1 is transmitted to annular aluminum alloy radiating fin 41 and phase change filler 42 through insulating layer 2, wherein annular aluminum alloy radiating fin 41 has high heat transfer performance, quickly transmitting cable core 1 to reinforcing layer 5 and outer sheath layer 6, and then to energy storage cable, and phase change filler 42 reduces temperature rise by phase change heat absorption, which can reduce the temperature rise speed of energy storage cable, that is, on the one hand, heat is transmitted and radiated, and on the other hand, phase change reduces temperature rise, which can well radiate energy storage cable and effectively reduce the temperature rise speed of cable, thereby solving the technical problems in the prior art.

[0040] Preferably,

[0041] Cable core 1 is made of silver-plated copper wire with a diameter of 0.15-0.3 mm in a 7x19 stranded manner.

[0042] The surface of the silver-plated copper wire is coated with a nano-aluminum oxide coating.

[0043] Preferably,

[0044] Insulating layer 2 is a double-layer co-extruded XLPE, wherein the inner layer is extruded with high-density XLPE and the outer layer is extruded with heat-conducting XLPE containing 10%-16% boron nitride.

[0045] Preferably,

[0046] Shielding layer 3 is a tinned copper wire braid formed by winding at an angle of 40°.

[0047] Preferably,

[0048] Reinforcing layer 5 is a composite structure of aramid fiber braid and galvanized steel wire spiral armor.

[0049] Preferably,

[0050] Outer sheath layer 6 is made of weather-resistant polyurethane material.

[0051] Preferably,

[0052] The thickness of outer sheath layer 6 is not less than 2.5 mm.

[0053] The surface of outer sheath layer 6 is provided with wavy grooves.

[0054] In the embodiment of the utility model, the energy storage cable can be produced in the following way: during production of the energy storage cable, first, the cable core 1 is prepared, specifically, silver-plated copper wires with a diameter of 0.2 mm are twisted into an inner conductor in a 7x19 twisting manner, and after twisting, the whole is immersed in a nano-aluminum oxide dispersion liquid and dried; then, the insulation layer 2 is prepared by using a double-layer co-extrusion process, that is, high-density XLPE is extruded on the inner layer, and heat-conducting XLPE containing 15% boron nitride is extruded on the outer layer; then, the shielding layer 3 is formed by winding the tinned copper wire braid at an angle of 40° and then coating a conductive polypyrrole coating; then, the annular aluminum alloy heat dissipation fins 41 are fixed outside the insulation layer 2, paraffin-based phase change material is injected between the annular aluminum alloy heat dissipation fins 41, and the spacing of the annular aluminum alloy heat dissipation fins 41 can be 50 mm; then, the reinforcing layer 5 formed by the aramid fiber braid and the galvanized steel wire spiral armor is sequentially coated; and finally, the outer sheath made of extruded weather-resistant polyurethane material is obtained.

[0055] Preferably,

[0056] The cable core 1 and the insulation layer 2 are also provided with a filling layer 7, wherein the filling layer 7 is made of flame-retardant rock wool rope.

[0057] It should be pointed out that the setting of the filling layer 7 can improve the flame-retardant performance and structural stability of the cable.

[0058] Preferably,

[0059] The heat dissipation channel layer 4 and the reinforcing layer 5 are also provided with a fireproof layer 8.

[0060] The fireproof layer 8 comprises, from inside to outside, a heat-resistant sublayer 81, a heat-insulating sublayer 82, a first flame-retardant sublayer 83 and a second flame-retardant sublayer 84.

[0061] Preferably,

[0062] The heat-resistant sublayer 81, the heat-insulating sublayer 82, the first flame-retardant sublayer 83 and the second flame-retardant sublayer 84 are respectively made of mica tape, asbestos material, rock wool rope and halogen-free flame retardant.

[0063] It should be pointed out that the addition of the fireproof layer 8 can improve the fire-retardant performance of the cable and avoid fire caused by overheating of the energy storage cable.

[0064] The utility model discloses an energy storage cable, including the cable core 1, insulating layer 2, shielding layer 3, heat dissipation channel layer 4, reinforcing layer 5 and outer sheath layer 6 that set up in proper order, the cable core 1 is twisted together by oxygen -free copper wire or silver -plated copper wire, heat dissipation channel layer 4 includes annular aluminium alloy cooling fin 41 that sets up in the interval along the cable axial direction, and the phase change filler 42 that fills in the annular aluminium alloy cooling fin 41, wherein phase change filler 42 is made of paraffin base phase change material. Through the setting of annular aluminium alloy cooling fin 41 and phase change filler 42, the utility model discloses an energy storage cable utilizes the active heat dissipation of annular aluminium alloy cooling fin 41 and the phase change heat absorption of phase change filler 42 and reduces the temperature rise, has good heat dissipation effect, and can solve the problems of prior art.

[0065] The above detailed description of the energy storage cable provided by the utility model, for the general technical personnel in the field, according to the thought of the utility model embodiment, there will be changes in specific implementation and application range, and the above, the content of the specification should not be understood as the limitation of the utility model.

Claims

1. An energy storage cable, characterized by The cable comprises, in sequence, a cable core (1), an insulation layer (2), a shielding layer (3), a heat dissipation channel layer (4), a reinforcing layer (5) and an outer sheath layer (6). The cable core (1) is twisted by oxygen-free copper wires or silver-plated copper wires. The heat dissipation channel layer (4) comprises annular aluminum alloy heat dissipation fins (41) arranged at intervals along the axial direction of the cable, and phase change fillers (42) filled between the annular aluminum alloy heat dissipation fins (41), wherein the phase change fillers (42) are made of paraffin-based phase change materials.

2. The energy storage cable according to claim 1, characterized in that, The cable core (1) is made of silver-plated copper wires with a diameter of 0.15-0.3 mm, and is twisted in a 7x19 manner. The surface of the silver-plated copper wire is coated with a nano-aluminum oxide coating.

3. The energy storage cable of claim 1, wherein, The shielding layer (3) is a tinned copper wire woven mesh wound at an angle of 40°.

4. The energy storage cable of claim 1, wherein, The reinforcing layer (5) is a composite structure of aramid fiber woven mesh and galvanized steel wire spiral armor.

5. The energy storage cable of claim 1, wherein, The outer sheath layer (6) is made of weather-resistant polyurethane material.

6. The energy storage cable of claim 5, wherein, The thickness of the outer sheath layer (6) is not less than 2.5 mm. The outer sheath layer (6) is provided with a wave-shaped groove on the surface.

7. The energy storage cable according to any of claims 1 to 6, characterized in that, A filling layer (7) is further arranged between the cable core (1) and the insulation layer (2), wherein the filling layer (7) is made of flame-retardant rock wool rope.

8. The energy storage cable according to any of claims 1 to 6, characterized in that, A fireproof layer (8) is further arranged between the heat dissipation channel layer (4) and the reinforcing layer (5). The fireproof layer (8) comprises, in sequence from the inside to the outside, a heat-resistant sublayer (81), a heat-insulating sublayer (82), a first flame-retardant sublayer (83) and a second flame-retardant sublayer (84).

9. The energy storage cable of claim 8, wherein, The heat-resistant sublayer (81), the heat-insulating sublayer (82), the first flame-retardant sublayer (83) and the second flame-retardant sublayer (84) are respectively made of mica tape, asbestos material, rock wool rope and halogen-free flame retardant.

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