Liquid-cooled high-toughness light charging pile cable

Abstract

The utility model relates to the technical field of wires and cables, in particular to a liquid-cooled high-toughness light charging pile cable, which comprises a protective sleeve layer, and a main insulating wire core, a grounding and auxiliary power wire core group, a signal and control wire core group and a filling part which are arranged in the protective sleeve layer, and is characterized in that the main insulating wire core comprises a first conductor, a liquid-cooled pipe and a first insulating layer; the first conductor wraps the liquid cooling pipe; the signal and control wire core group comprises a wire core sheath, a shielding layer, a plurality of third conductors and a plurality of third insulating layers respectively coating the peripheries of the corresponding third conductors; the third conductor, the third insulating layer and the shielding layer are all arranged in the wire core sheath; the shielding layer wraps the periphery of at least one third insulating layer, and the other third insulating layers are located outside the shielding layer. According to the charging pile cable, the liquid cooling pipe is additionally arranged in the main insulation wire core to serve as a cooling structure, so that too fast conductor temperature rise and transmission efficiency reduction are avoided, and charging duration and energy loss are reduced; and the charging pile cable is light in overall weight, convenient to use and long in service life.

Description

Technical Field

[0001] The utility model relates to the technical field of wires and cables, and in particular to a liquid-cooled, high-toughness, lightweight charging pile cable. Background Art

[0002] Charging pile cables are one of the key components of new energy vehicles, and are closely related to the safety, efficiency and reliability of vehicle charging and transmission of electrical energy. A good charging pile cable must have the characteristics of fast transmission, high strength and durability, high temperature tolerance, fire retardancy and so on. Although the market demand for charging pile cables has risen sharply, market competition has become increasingly fierce. With the gradual maturity of the market, the supporting products of charging pile cables have continued to increase. The charging pile cable industry is facing competition from many manufacturers at home and abroad. The competition in terms of cable product quality, price, delivery cycle, etc. will be more challenging. For enterprises, high-quality, high-efficiency and high-output production models are more needed to meet market demand.

[0003] The rapid development of charging pile technology has put forward more and higher requirements for charging pile cables. At present, the main problems of charging pile cables are as follows: (1) The temperature of the cable rises quickly during operation, the internal heat dissipation effect is poor, and the efficiency of the main core transmitting electric energy is reduced, resulting in an increase in charging time; (2) The cable with complex structure and large specifications is heavy overall weight, and two sections of the cable are always suspended. Due to the drooping of its own weight, the charging gun head, the charging cabinet and the cable connection will be stressed for a long time, and the sheath is prone to cracking or internal damage; (3) The overall tensile and drag resistance of the cable is not strong. After long-term movement and bending, it is easy to break the line, resulting in the charging pile being unusable and requiring the entire cable to be replaced at a high cost; (4) The internal pressure and extrusion resistance of the cable is poor. People, vehicles, and objects may accidentally step on, crush, or hit the cable, causing deformation or damage. Therefore, further improvement is needed. Summary of the invention

[0004] In order to overcome the shortcomings and deficiencies in the prior art, the purpose of the utility model is to provide a liquid-cooled high-toughness lightweight charging pile cable. The liquid-cooled high-toughness lightweight charging pile cable adds a liquid cooling tube in the main insulating core as a cooling structure to avoid excessive temperature rise of the conductor and reduced transmission efficiency, thereby reducing charging time and energy loss; and the charging pile cable has an overall light weight, is easy to use, and has a long service life.

[0005] In order to solve the above technical problems, the utility model adopts the following technical solutions: a liquid-cooled high-toughness lightweight charging pile cable, comprising a protective sheath and a main insulating core, a grounding and auxiliary power core group, a signal and control core group and a filling part arranged in the protective sheath, the main insulating core comprising a first conductor, a liquid cooling tube and a first insulating layer wrapped around the outer periphery of the first conductor, the first conductor being wrapped around the liquid cooling tube; the grounding and auxiliary power core group comprising a grounding core and an auxiliary power core, the grounding core and the auxiliary power core both comprising a second conductor and a second insulating layer wrapped around the outer periphery of the second conductor; the signal and control core group comprising a core sheath, a shielding layer, a plurality of third conductors and a plurality of third insulating layers respectively wrapped around the outer periphery of the corresponding third conductors; the third conductor, the third insulating layer and the shielding layer are all arranged in the core sheath; the shielding layer is coated on the outer periphery of at least one third insulating layer, and the remaining third insulating layers are located outside the shielding layer; the filling part is used to fill the gap inside the cable.

[0006] Furthermore, the main insulated core also includes a liquid cooling protective layer, the liquid cooling protective layer is coated on the outer circumference of the liquid cooling tube, and the first conductor is wrapped around the outer circumference of the liquid cooling protective layer.

[0007] Furthermore, the first conductor, the second conductor and the third conductor are all formed by twisting a plurality of copper-plated aluminum alloy wires.

[0008] Furthermore, the first insulating layer, the second insulating layer and the third insulating layer are all made of EPDM flame retardant rubber.

[0009] Furthermore, the liquid cooling pipe is a cross-linked polyethylene plastic hose.

[0010] Furthermore, the liquid cooling protective layer includes a water-blocking yarn layer and a cross-linked polyethylene protective layer wrapped around the water-blocking yarn layer, the water-blocking yarn layer is wrapped around the outer periphery of the liquid cooling tube, and the first conductor is wrapped around the outer periphery of the cross-linked polyethylene protective layer.

[0011] Furthermore, the shielding layer includes a polyester tape layer, a copper wire braided layer, a composite copper foil and a polyethylene protective layer which are arranged in sequence from the inside to the outside; the composite copper foil includes a plastic-based film layer and a copper film layer which are arranged in sequence from the inside to the outside; the plastic-based film layer is coated on the outer periphery of the copper wire braided layer; and the polyethylene protective layer is coated on the outer periphery of the copper film layer.

[0012] Furthermore, the protective sheath layer includes an inner sheath, an outer sheath and a plurality of load-bearing members, wherein the plurality of load-bearing members are arranged in a circular array on the periphery of the inner sheath and located between the inner sheath and the outer sheath, and the outer sheath covers the periphery of the inner sheath and the plurality of load-bearing members.

[0013] Furthermore, the inner sheath is made of EPDM rubber.

[0014] Furthermore, the liquid-cooled high-toughness lightweight charging pile cable also includes a wrapping tape, which wraps around the main insulating core, the grounding and auxiliary power core group, the signal and control core group and the filling part, and the protective sheath layer wraps around the outer periphery of the wrapping tape.

[0015] Beneficial effects of the utility model: the liquid-cooled high-toughness lightweight charging pile cable of the utility model adds a liquid cooling tube in the main insulating core as a cooling structure, thereby avoiding excessive temperature rise of the conductor and reduced transmission efficiency, reducing charging time and energy loss; and the charging pile cable is light in overall weight, easy to use, and has a long service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a cross-sectional view of the liquid-cooled, high-toughness, lightweight charging pile cable of the utility model.

[0017] Figure 2 It is a cross-sectional view of the main insulating core of the utility model.

[0018] Figure 3 It is a cross-sectional view of the grounding and auxiliary power supply core of the utility model.

[0019] Figure 4 It is a cross-sectional view of the signal and control wire core group of the utility model.

[0020] The reference numerals include: 1-main insulated core, 11-liquid cooling tube, 12-liquid cooling protective layer, 13-first conductor, 14-first insulation layer, 2-grounding and auxiliary power core group, 21-second conductor, 22-second insulation layer 22, 3-signal and control core group, 31-third conductor, 32-third insulation layer, 33-shielding layer, 34-core sheath, 4-filling part, 5-tape, 6-inner sheath, 7-load-bearing member, 8-outer sheath. DETAILED DESCRIPTION

[0021] In order to facilitate the understanding of those skilled in the art, the present invention is further described below in conjunction with embodiments and drawings. The contents mentioned in the implementation modes are not intended to limit the present invention.

[0022] like Figure 1-4As shown, a liquid-cooled high-toughness light charging pile cable includes a protective sheath and a main insulating core 1, a grounding and auxiliary power core group 2, a signal and control core group 3 and a filling portion 4 arranged in the protective sheath. The main insulating core 1 includes a first conductor 13, a liquid cooling tube 11 and a first insulating layer 14 wrapped around the outer periphery of the first conductor 13, and the first conductor 13 is wrapped around the liquid cooling tube 11; the grounding and auxiliary power core group 2 includes a grounding core and an auxiliary power core, and the grounding core and the auxiliary power core each include a second conductor 21 and a second insulating layer 22 wrapped around the outer periphery of the second conductor 21; the signal and control core group 3 includes a core sheath 34, a shielding layer 33, a plurality of third conductors 31 and a plurality of third insulating layers 32 respectively wrapped around the outer peripheries of the corresponding third conductors 31; the third conductors 31, the third insulating layer 32 and the shielding layer 33 are all arranged in the core sheath 34; the shielding layer 33 is wrapped around the outer periphery of at least one third insulating layer 32, and the remaining third insulating layers 32 are located outside the shielding layer 33; the filling part 4 is used to fill the gap inside the cable.

[0023] The liquid-cooled, high-toughness, lightweight charging pile cable of the utility model adds a liquid cooling tube 11 in the main insulating core 1 as a cooling structure to avoid excessive temperature rise of the conductor and reduced transmission efficiency, thereby reducing charging time and energy loss. The charging pile cable is light in overall weight, easy to use, and has a long service life.

[0024] In this embodiment, the number of the third conductors 31 and the number of the third insulating layers 32 are both four, the shielding layer 33 is coated on the outer periphery of the two third insulating layers 32 and the outer peripheries of the two third insulating layers 32 are in contact with the inner surface of the shielding layer 33, the remaining two third conductors 31 and the two third insulating layers 32 respectively coated on the two third conductors 31 are all located outside the shielding layer 33, and the core sheath 34 is coated on the outer periphery of the shielding layer 33 and the two third insulating layers 32 outside the shielding layer 33.

[0025] Furthermore, the filling part 4 adopts an anti-extrusion environmentally friendly filling rope, which has the characteristics of light weight, high temperature resistance, halogen-free, low smoke, and flame retardancy, and has good filling and physical properties, greatly improving the roundness of the cable and enhancing the cable's tensile and extrusion resistance. The anti-extrusion environmentally friendly filling rope adopts the anti-extrusion environmentally friendly filling rope in the prior art, which is used here. The filling part 4 is used to fill the gaps between the main insulating core 1, the grounding and auxiliary power core group 2, the signal and control core group 3 and the protective sheath layer in the internal protective sheath of the cable.

[0026] Furthermore, the first conductor 13, the second conductor 21 and the third conductor 31 are all formed by twisting a plurality of copper-plated aluminum alloy wires. Compared with the traditional aluminum conductor, the aluminum alloy used has relatively high strength and corrosion resistance, and has good electrical conductivity, thermal conductivity and molding processing performance, and is more adaptable to complex environments and stress conditions. A layer of copper with better conductivity is plated on the surface of the aluminum alloy wire to reduce the internal resistance of the conductor, which can significantly improve the electrical conductivity. The superior electrical conductivity of copper makes the current transmission faster and more stable, effectively improving the transmission efficiency. The copper-plated aluminum alloy wire used in this embodiment has good wear resistance and ductility, reduces the weight of the product, and reduces the production cost.

[0027] Furthermore, the first insulating layer 14, the second insulating layer 22 and the third insulating layer 32 are all made of EPDM flame retardant rubber. The EPDM flame retardant rubber adopts the EPDM flame retardant rubber in the prior art, which has good mechanical properties, thermal stability and flame retardant effect and is used here.

[0028] Furthermore, the liquid cooling tube 11 is a cross-linked polyethylene plastic hose, which is easy to clean and can be cleaned to a high standard without a detergent. It has high flex fatigue resistance, good compatibility, can be injected with chemicals or other fluids, and has a relatively low cost. The liquid cooling tube 11 is made of a cross-linked polyethylene material in the prior art, which is used here.

[0029] Furthermore, the main insulated core 1 also includes a liquid cooling protective layer 12, the liquid cooling protective layer 12 is coated on the outer periphery of the liquid cooling tube 11, and the first conductor 13 is wrapped around the outer periphery of the liquid cooling protective layer 12. The liquid cooling protective layer 12 includes a water-blocking yarn layer and a cross-linked polyethylene protective layer coated on the outer periphery of the water-blocking yarn layer, the water-blocking yarn layer is wrapped around the outer periphery of the liquid cooling tube 11, and the first conductor 13 is wrapped around the outer periphery of the cross-linked polyethylene protective layer. The water-blocking yarn is composed of polyester yarn reinforcement and polyacrylate water-blocking agent. After absorbing water, its volume expands rapidly to fill the gap between the cable cores and block the inflow of water. It has high water-blocking efficiency, good breaking strength and elongation. The cross-linked polyethylene protective layer prevents aluminum wire burrs from damaging the liquid cooling tube 11, and also prevents the internal liquid from flowing out of the pipe due to damage. The cross-linked polyethylene protective layer is made of cross-linked polyethylene material in the prior art, which is used here.

[0030] Furthermore, the shielding layer 33 includes a polyester tape layer, a copper wire braided layer, a composite copper foil and a polyethylene protective layer arranged in sequence from the inside to the outside, and the composite copper foil includes a plastic-based film layer and a copper film layer arranged in sequence from the inside to the outside, the plastic-based film layer is coated on the outer periphery of the copper wire braided layer, and the polyethylene protective layer is coated on the outer periphery of the copper film layer. The copper wire braided layer can shield low-frequency signals. The composite copper foil wrapping can seal and shield various high-frequency signals, effectively prevent external signal interference, and ensure the effective transmission of control instructions. The plastic-based film can prevent the copper film layer from being corroded.

[0031] Furthermore, the protective sheath layer includes an inner sheath 6, an outer sheath 8 and a plurality of load-bearing members 7, wherein the plurality of load-bearing members 7 are arranged in a circular array on the periphery of the inner sheath 6 and between the inner sheath 6 and the outer sheath 8, and the outer sheath 8 is coated on the periphery of the inner sheath 6 and the plurality of load-bearing members 7. The load-bearing member 7 is a tensile-resistant flame-retardant rope. The tensile-resistant flame-retardant rope has high strength, bending resistance, low hardness, corrosion resistance, and flexibility, which can not only effectively protect the cable, but also enhance the tensile resistance of the entire cable and extend its service life. The tensile-resistant flame-retardant rope adopts the tensile-resistant flame-retardant rope in the prior art, which is used here.

[0032] Furthermore, the inner sheath 6 is made of EPDM rubber, which has the characteristics of low smoke, halogen-free, flame retardant, high mechanical strength and high insulation resistance. It can offset most of the force when the cable is subjected to pressure and tension, and has a certain resilience to protect the internal cable core from damage. The outer sheath 8 is made of a mixed elastomer of polyolefin and chlorinated polyethylene, so that the outer sheath 8 has the characteristics of torsion resistance, severe cold resistance, oil resistance, corrosion resistance, and twisting resistance. In this embodiment, the inner sheath 6 adopts EPDM rubber in the prior art, and the outer sheath 8 adopts a mixed elastomer of polyolefin and chlorinated polyethylene in the prior art, which is used here. The protective sheath layer of this embodiment adopts rubber and similar elastomer materials, which have excellent physical and mechanical properties, good softness and high resilience, and a long service life.

[0033] Furthermore, the liquid-cooled high-toughness light charging pile cable also includes a wrapping tape 5, which is wrapped around the main insulating core 1, the grounding and auxiliary power core group 2, the signal and control core group 3 and the filling part 4, and the protective sheath is wrapped around the outer periphery of the wrapping tape 5. In this embodiment, all the cores are twisted and formed and then tied with the wrapping tape 5. The wrapping tape 5 is a composite water-blocking tape, which includes a polyester film layer and an expansion layer arranged in sequence from the inside to the outside, which not only enhances the tensile strength of the wrapping tape 5, but also has a certain insulation resistance, isolating the internal cable core from the outside; when wrapping, the polyester film layer faces inward and the expansion layer faces outward, which provides double protection and ensures water-blocking performance.

[0034] The above contents are only preferred embodiments of the present invention. For ordinary technicians in this field, according to the concept of the present invention, there will be changes in the specific implementation methods and application scopes. The contents of this specification should not be understood as limiting the present invention.

Claims

1. A liquid-cooled, high-toughness, lightweight charging pile cable, characterized in that: It comprises a protective sheath, a main insulated wire core, a grounding and auxiliary power wire core group, a signal and control wire core group and a filling part arranged in the protective sheath, wherein the main insulated wire core comprises a first conductor, a liquid cooling tube and a first insulating layer wrapped around the outer periphery of the first conductor, and the first conductor is wrapped around the liquid cooling tube; the grounding and auxiliary power wire core group comprises a grounding wire core and an auxiliary power wire core, and the grounding wire core and the auxiliary power wire core both comprise a second conductor and a second insulating layer wrapped around the outer periphery of the second conductor; The signal and control wire core group comprises a wire core sheath, a shielding layer, a plurality of third conductors and a plurality of third insulating layers respectively coated on the outer periphery of the corresponding third conductors; the third conductors, the third insulating layers and the shielding layer are all arranged in the wire core sheath; the shielding layer is coated on the outer periphery of at least one third insulating layer, and the remaining third insulating layers are located outside the shielding layer; The filling part is used to fill the gap inside the cable.

2. The liquid-cooled high-toughness lightweight charging pile cable according to claim 1 is characterized in that: The main insulated core further includes a liquid cooling protective layer, the liquid cooling protective layer is coated on the outer circumference of the liquid cooling tube, and the first conductor is wrapped around the outer circumference of the liquid cooling protective layer.

3. The liquid-cooled high-toughness lightweight charging pile cable according to claim 1 is characterized in that: The first conductor, the second conductor and the third conductor are all formed by twisting a plurality of copper-plated aluminum alloy wires.

4. The liquid-cooled high-toughness lightweight charging pile cable according to claim 1, characterized in that: The first insulating layer, the second insulating layer and the third insulating layer are all made of EPDM flame retardant rubber.

5. The liquid-cooled high-toughness lightweight charging pile cable according to claim 1, characterized in that: The liquid cooling pipe is a cross-linked polyethylene plastic hose.

6. The liquid-cooled high-toughness lightweight charging pile cable according to claim 2, characterized in that: The liquid cooling protective layer includes a water-blocking yarn layer and a cross-linked polyethylene protective layer wrapped around the water-blocking yarn layer. The water-blocking yarn layer is wrapped around the outer periphery of the liquid cooling tube, and the first conductor is wrapped around the outer periphery of the cross-linked polyethylene protective layer.

7. The liquid-cooled high-toughness lightweight charging pile cable according to claim 1, characterized in that: The shielding layer includes a polyester tape layer, a copper wire braided layer, a composite copper foil and a polyethylene protective layer arranged in sequence from the inside to the outside; the composite copper foil includes a plastic-based film layer and a copper film layer arranged in sequence from the inside to the outside; the plastic-based film layer is coated on the outer periphery of the copper wire braided layer; and the polyethylene protective layer is coated on the outer periphery of the copper film layer.

8. The liquid-cooled high-toughness lightweight charging pile cable according to claim 1, characterized in that: The protective sheath layer comprises an inner sheath, an outer sheath and a plurality of load-bearing members, wherein the plurality of load-bearing members are arranged in an annular array on the outer periphery of the inner sheath and between the inner sheath and the outer sheath, and the outer sheath covers the outer periphery of the inner sheath and the plurality of load-bearing members.

9. The liquid-cooled high-toughness lightweight charging pile cable according to claim 8, characterized in that: The inner sheath is made of EPDM rubber.

10. The liquid-cooled, high-toughness, lightweight charging pile cable according to claim 1, characterized in that: The liquid-cooled high-toughness lightweight charging pile cable also includes a wrapping tape, which wraps around the main insulating core, the grounding and auxiliary power core group, the signal and control core group and the filling part, and the protective sheath layer wraps around the outer periphery of the wrapping tape.

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