A constant-temperature high-power charging pile cable

Abstract

The utility model discloses a constant temperature high -power charging pile cable relates to charging pile cable technical field, aims at solving the problem of cable heat difficult to quickly dissipate, cable is vulnerable to damage when weather is cold in prior art, adopts the technical scheme, including the core and PTC material layer, the core still includes conductor and insulating layer, and the conductor is extruded and is covered with the insulating layer, a plurality of the core is stranded into the cable core, and the cable core is wrapped with the wrapping layer, and the cable core with the wrapping layer between is equipped with the filling material, and the filling material adopts solid solid phase change material, through adopting solid solid phase change material as filling material, can absorb and store a large amount of heat energy, and material still maintains solid state, avoids the situation of liquid leakage, the wrapping layer is equipped with first metal shielding layer, the PTC material layer, second metal shielding layer and sheath in proper order outward.

Description

Technical Field

[0001] This utility model relates to the field of charging pile cable technology, specifically a constant temperature high-power charging pile cable. Background Technology

[0002] With the increasing popularity of electric vehicles, the demand for fast charging is also growing stronger. These demands place higher requirements on the performance of charging pile cables. Compared with refueling traditional gasoline vehicles, electric vehicle charging takes much longer. To save charging time, current technologies mainly achieve fast charging by increasing the charging current. However, during high-power charging, the cable is prone to generating high temperatures due to excessive current, which leads to a rapid decrease in cable current carrying capacity, reduces cable transmission performance, affects charging efficiency, accelerates insulation aging, and may even pose safety hazards.

[0003] When charging at high power, the heat generated by the conductor resistance of existing charging pile cables is difficult to dissipate in time, affecting charging efficiency and equipment lifespan. Although existing technologies use solid-liquid phase change materials as fillers in cables, these materials melt after absorbing heat, which can lead to leakage during long-term use. Furthermore, when the ambient temperature is low, the cables become hard and brittle, causing cable damage and affecting equipment lifespan. Utility Model Content

[0004] The technical problem to be solved by this utility model is to overcome the existing defects and provide a constant temperature high-power charging pile cable, which can effectively solve the problems in the background art.

[0005] To achieve the above objectives, this utility model discloses a constant temperature high-power charging pile cable. The technical solution adopted is that it includes a wire core and a PTC material layer. The wire core also includes a conductor and an insulation layer, and the conductor is extruded with the insulation layer. Multiple sets of the aforementioned wire cores are twisted together to form a cable core, and the cable core is wrapped with a wrapping layer. A filler material is provided between the cable core and the wrapping layer. The filler material is a solid-solid phase change material. By using a solid-solid phase change material as the filler material, a large amount of heat energy can be absorbed and stored, and the material remains solid, thus avoiding leakage. The outer layer of the wrapping layer is provided with a first metal shielding layer, the PTC material layer, a second metal shielding layer and a sheath in sequence.

[0006] As a preferred technical solution of this utility model, the conductor is made of six types of annealed soft copper wire stranded together.

[0007] As a preferred embodiment of this invention, the insulating layer is made of TPE polymer material.

[0008] As a preferred technical solution of this utility model, the filling material is a flame-retardant, high thermal conductivity solid-solid phase change material.

[0009] As a preferred embodiment of this invention, the wrapping layer is made of graphene thermostatic fiber.

[0010] As a preferred technical solution of this utility model, the first metal shielding layer and the second metal shielding layer are made of metal mesh woven from tin-plated copper wire. The two layers of tin-plated copper wire woven metal shielding layers not only enhance the electromagnetic shielding effect, but also improve the oxidation and corrosion resistance of the cable and extend its service life.

[0011] As a preferred technical solution of this utility model, the PTC material layer adopts a positive temperature coefficient thermistor. In low temperature environment, the PTC material layer has low resistance and high power, which can quickly heat the cable. When the temperature rises to 20°C, the resistance increases sharply to the insulation state, and heating stops. In addition, it is used in conjunction with solid-solid phase change material to further maintain the cable temperature stability.

[0012] As a preferred embodiment of this utility model, the sheath is made of TPEE material.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows: by using solid-solid phase change material as the filling material, this utility model can absorb and store a large amount of heat energy, and the material remains solid, avoiding leakage; in low-temperature environments, the PTC material layer has low resistance and high power, which can quickly heat the cable; when the temperature rises to 20°C, the resistance increases sharply to the insulation state, stopping the heating, and when used in conjunction with solid-solid phase change material, it further maintains the cable temperature stability.

[0014] The two-layer tin-plated copper wire braided metal shielding not only enhances the electromagnetic shielding effect, but also improves the cable's resistance to oxidation and corrosion, extending its service life. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model.

[0016] In the diagram: 1. Conductor; 2. Insulating layer; 3. Filler material; 4. Wrapping tape layer; 5. First metal shielding layer; 6. PTC material layer; 7. Second metal shielding layer; 8. Sheath. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model. Example 1

[0018] like Figure 1 As shown, this utility model discloses a constant temperature high-power charging pile cable. The technical solution adopted is that it includes a wire core and a PTC material layer 6. The wire core also includes a conductor 1 and an insulation layer 2. The conductor 1 is extruded with the insulation layer 2. Multiple sets of the aforementioned wire cores are twisted together to form a cable core, and the cable core is wrapped with a wrapping layer 4. A filler material 3 is provided between the cable core and the wrapping layer 4. The filler material 3 is a solid-solid phase change material. The outer layer of the wrapping layer 4 is provided with a first metal shielding layer 5, the PTC material layer 6, a second metal shielding layer 7, and a sheath 8 in sequence.

[0019] The copper wires in conductor 1 are drawn using high-speed continuous deformation technology and twisted together.

[0020] The conductor 1 has a single filament that is a Category 6 annealed soft copper wire, which increases the flexibility of the cable.

[0021] The insulating layer 2 is a TPE polymer material, which is melt-extruded onto the conductor 1, giving the insulating layer 2 excellent mechanical properties, electrical properties, wear resistance, flexibility and other properties.

[0022] The filler material 3 is a flame-retardant, high thermal conductivity cross-linked polyurethane (PUX) phase change material, which keeps the cable temperature within a suitable temperature range.

[0023] Cross-linked polyurethane (PUX) phase change materials not only possess superior mechanical properties and are convenient for production and use, but they can also absorb or release large amounts of heat while maintaining their solid state. The phase change temperature of PUX is 25℃-50℃. When the ambient temperature is above 50℃, the material can absorb and retain a large amount of heat; when the ambient temperature is below 25℃, the material can release the retained heat, keeping the ambient temperature within a suitable range. Furthermore, PUX also has excellent flame retardancy and can self-extinguish in the event of a fire, greatly improving cable safety. When cables operate at high power for extended periods, conductor 1 generates a large amount of heat, causing a rapid decrease in current carrying capacity, affecting the cable's normal performance, accelerating insulation aging, and reducing cable lifespan. This is where PUX filling comes into play. When the cable temperature is above 50℃, the material can absorb and retain a large amount of heat; when the cable temperature is below 25℃, the material can release the retained heat, keeping the cable temperature within a suitable range. This can not only ensure the transmission performance of the cable, but also extend the service life of the cable to a certain extent.

[0024] The wrapping layer 4 is graphene thermostatic fiber, which has excellent electrical conductivity, thermal conductivity and mechanical strength. It can serve as an electromagnetic shield and can also conduct heat quickly.

[0025] The first metal shielding layer 5 and the second metal shielding layer 7 are made of tin-plated copper wire woven metal mesh, which can not only conduct electricity and play an electromagnetic shielding role, but also be more resistant to oxidation and corrosion.

[0026] The PTC material layer 6 is a positive temperature coefficient thermistor. In low winter temperatures, the PTC material has low resistance and high power, allowing for rapid heating. As the temperature gradually rises to 20°C, the PTC resistance increases sharply to an insulating state, then heating stops, keeping the cable temperature within a suitable range. This ensures the cable's transmission performance and extends its service life to some extent.

[0027] The sheath 8 is a TPEE (thermoplastic polyester elastic) sheath, which, compared with traditional sheath materials, can greatly improve the overall mechanical properties, aging resistance, wear resistance, oil resistance, and high and low temperature resistance of the cable, and has excellent flexibility.

[0028] Components not described in detail in this article are existing technologies.

[0029] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A constant-temperature high-power charging pile cable, characterized in that: It includes a wire core and a PTC material layer (6), the wire core further includes a conductor (1) and an insulation layer (2), the conductor (1) is externally covered with the insulation layer (2); Multiple sets of the aforementioned wire cores are twisted together to form a cable core, and the cable core is wrapped with a wrapping layer (4), and a filling material (3) is provided between the cable core and the wrapping layer (4), and the filling material (3) is a solid-solid phase change material; The outer side of the wrapping layer (4) is provided with a first metal shielding layer (5), the PTC material layer (6), a second metal shielding layer (7), and a sheath (8).

2. The constant temperature high-power charging pile cable according to claim 1, characterized in that: The conductor (1) is made of stranded Class 6 annealed soft copper wire.

3. The constant temperature high-power charging pile cable according to claim 1, characterized in that: The insulating layer (2) is made of TPE polymer material.

4. The constant temperature high-power charging pile cable according to claim 1, characterized in that: The filling material (3) is a flame-retardant, high thermal conductivity solid-solid phase change material.

5. The constant temperature high-power charging pile cable according to claim 1, characterized in that: The wrapping layer (4) is made of graphene thermostatic fiber.

6. The constant temperature high-power charging pile cable according to claim 1, characterized in that: The first metal shielding layer (5) and the second metal shielding layer (7) are made of metal mesh woven from tin-plated copper wire.

7. The constant temperature high-power charging pile cable according to claim 1, characterized in that: The PTC material layer (6) is a positive temperature coefficient thermistor.

8. The constant temperature high-power charging pile cable according to claim 1, characterized in that: The sheath (8) is made of TPEE material.

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