CN206649924U - A kind of direct current charging cable for electric automobile - Google Patents

Abstract

The present application provides a DC charging cable for electric vehicles, comprising a cable main body, a first wrapping layer arranged outside the cable main body, and a sheath arranged outside the first wrapping layer, and the cable main body includes a A cable core composed of a DC power core, a protective grounding core, and a functional line, and a first filling layer arranged between the cable core and the first wrapping layer; the functional line includes a functional core and the functional line The second wrapping layer, the shielding layer and the third wrapping layer that are sequentially covered on the outside of the core; the functional core is composed of a charging communication core unit, a charging connection confirmation core unit, a low-voltage auxiliary power supply core and a second filling composed of layers. The application can improve the mechanical strength of each wire core, especially improve the drag resistance of the charging communication wire core and the charging connection confirmation wire core, effectively prevent the charging communication wire core and the charging connection confirmation wire core from being broken due to excessive external force, Extend the life of the DC charging cable.

Description

A DC charging cable for electric vehicles

technical field

The present application relates to the field of cables, in particular to a DC charging cable for electric vehicles.

Background technique

As people's awareness of environmental protection increases, the application of environmentally friendly and energy-saving electric vehicles is becoming more and more extensive. Electric vehicles rely on the battery to provide energy sources; when the battery is exhausted, the battery needs to be connected to the charging pile through a DC charging cable to charge the battery.

The current DC charging cable on the market is generally composed of a DC power supply line, a charging communication line, and a charging connection confirmation line. The DC charging cable often needs to be dragged or bent during use, which can easily cause serious bending and deformation of the charging cable. Since the cores of the charging communication line and the charging connection confirmation line are thin, it is easier to scrap the entire DC charging cable due to breakage , affecting the service life of the DC charging cable.

Utility model content

The present application provides a DC charging cable for an electric vehicle to solve the problem that the existing charging cable is easily broken due to dragging or bending due to serious bending deformation, resulting in shortened service life.

The present application provides a DC charging cable for electric vehicles, including a cable body, a first wrapping layer arranged outside the cable body, and a sheath arranged outside the first wrapping layer,

The cable main body includes a cable core composed of a DC power core, a protective grounding core and a functional wire, and a first filling layer arranged between the cable core and the first wrapping layer;

The functional wire includes a functional core and a second wrapping layer, a shielding layer, and a third wrapping layer that are sequentially coated on the outside of the functional core;

The functional core is composed of a charging communication core unit, a charging connection confirmation core unit, a low-voltage auxiliary power core and a second filling layer twisted.

Optionally, there are two DC power cores, which are distributed symmetrically along the centerline of the cable body;

The protective grounding wire core and the functional wire are respectively located in the outer gap between the DC power wire core and the first wrapping layer.

Optionally, there are two low-voltage auxiliary power wire cores, which are distributed symmetrically along the center line of the functional line;

The charging communication core unit and the charging connection confirmation core unit are respectively located in the outer gap between the low-voltage auxiliary power supply core and the second wrapping layer.

Optionally, the shielding layer is a braided layer made of copper wires or tinned copper wires, and the angle between the two copper wires or tinned copper wires intersecting is 15°-35°.

Optionally, the charging communication core unit is composed of a charging communication positive core, a charging communication negative core, and a third filling layer twisted and then applied with a fourth wrapping layer.

Optionally, the charging connection confirming core unit is composed of two charging connection confirming cores and a third filling layer twisted and then applied with a fourth wrapping layer.

Optionally, the DC power line core, the protective grounding line core, the charging communication positive line core, the charging communication negative line core, the charging connection confirmation line core, and the low-voltage auxiliary power line core are all It consists of a conductor, a conductor tape, an insulating layer and an insulating tape.

Optionally, the first wrapping layer and the second wrapping layer are non-woven fabric layers with a thickness of 0.1 mm;

The third wrapping layer, the fourth wrapping layer and the insulating tape are made of polytetrafluoroethylene, polypropylene or nylon;

The conductor wrapping tape is a polyester tape with a thickness of 0.06mm or a non-woven fabric tape with a thickness of 0.1mm;

The insulating layer is made of ethylene-propylene rubber mixture or thermoplastic elastomer;

The sheath is constructed of synthetic elastomer.

Optionally, the first filling layer is made of polypropylene filling rope, flame-retardant rubber filling strip or flame-retardant filling rope;

The second filling layer and the third filling layer are made of aramid fiber.

Optionally, the conductor is formed by twisting multiple oxygen-free copper wires or by compound twisting multiple strands;

When the conductor is formed by compound twisting of multiple strands, each strand is formed by twisting oxygen-free copper wires, and the twisting direction of the oxygen-free copper wires is opposite to the direction of compound twisting of the strands.

It can be known from the above technical solutions that this application provides a DC charging cable for electric vehicles, which twists the charging communication core and the charging connection confirmation core with the smallest cross-section, the low-voltage auxiliary power core with a relatively small cross-section, and the second filling layer. Combined into a functional core, compared with separate charging communication cores, charging connection confirmation cores and low-voltage auxiliary power cores, the mechanical strength of each core is improved, and the functional core has a DC power cord with a larger cross-section. The equivalent mechanical strength of the grounding core and the protective grounding core balances the force on the cable, especially improves the drag resistance of the charging communication core and the charging connection confirmation core, and effectively prevents the charging communication core and the charging connection confirmation core from being overwhelmed. The core is broken due to large external force, which prolongs the service life of the DC charging cable.

Description of drawings

In order to illustrate the technical solution of the present application more clearly, the accompanying drawings used in the embodiments will be briefly introduced below. Obviously, for those of ordinary skill in the art, on the premise of not paying creative labor, Additional drawings can also be derived from these drawings.

FIG. 1 is a functional diagram of a DC charging cable for an electric vehicle provided in an embodiment of the present application;

FIG. 2 is a structural diagram of a DC charging cable for an electric vehicle provided in an embodiment of the present application;

FIG. 3 is a functional diagram of a functional line provided by an embodiment of the present application;

FIG. 4 is a structural diagram of a function line provided by an embodiment of the present application.

Among them, 1-protective grounding core, 2-DC power core, 21-DC power negative core, 22-DC power positive core, 3-functional line, 4-first filling layer, 5-first wrapping Layer, 6-conductor, 7-conductor tape, 8-insulation layer, 9-insulation tape, 10-sheath, 11-second filling layer, 12-charge communication negative core, 13-charge communication positive core , 14-charging connection confirmation core, 15-low voltage auxiliary power core, 151-low voltage auxiliary power positive core, 152-low voltage auxiliary power negative core, 16-second wrapping layer, 17-shielding layer, 18- The third wrapping layer, 19-the fourth wrapping layer, 20-the third filling layer.

detailed description

Referring to Fig. 1, Fig. 2 and Fig. 3, the embodiment of the present application provides a DC charging cable for electric vehicles, including a cable main body, a first wrapping layer 5 arranged outside the cable main body, and a wrapping layer 5 arranged on the first wrapping layer. a sheath 10 external to the cladding 5,

The cable body includes a cable core composed of a DC power supply core 2, a protective grounding core 1 and a functional line 3, and a first filling layer 4 arranged between the cable core and the first wrapping layer 5;

The functional wire 3 includes a functional wire core and a second wrapping layer 16, a shielding layer 17 and a third wrapping layer 18 that are sequentially covered outside the functional core;

The functional core is composed of a charging communication core unit, a charging connection confirmation core unit, a low-voltage auxiliary power core 15 and a second filling layer 11 stranded.

It can be known from the above technical solutions that the present application provides a DC charging cable for electric vehicles, which twists the charging communication core and the charging connection confirmation core with the smallest cross-section, the low-voltage auxiliary power core 15 with a relatively small cross-section, and the second filling layer 11. Combined into a functional core, compared with the separate charging communication core, charging connection confirmation core and low-voltage auxiliary power core 15, the mechanical strength of each core is improved, and the functional core has a DC power supply with a larger cross-section. The equivalent mechanical strength of the core 2 and the protective grounding core 1 balances the force on the cable, especially improves the drag resistance of the charging communication core and the charging connection confirmation line, effectively preventing the charging communication core and the charging connection confirmation line from being damaged. The core is broken due to excessive external force, which prolongs the service life of the DC charging cable.

Further, there are two DC power cores 2, which are distributed symmetrically along the center line of the cable body;

The protective grounding core 1 and the functional line 3 are respectively located in the outer gap between the DC power core 2 and the first wrapping layer 5 .

The two DC power cores 2 in this embodiment are the DC power positive core 22 and the DC power negative core 21 respectively, and are symmetrically distributed along the center line of the cable main body to play the role of support. When the DC charging cable is subjected to external force When dispersing part of the external force to the DC power supply core 2, the force on the protective grounding core 1 and the functional line 3 can be effectively reduced, thereby improving the drag resistance of the DC charging cable and increasing the service life of the DC charging cable.

Further, there are two low-voltage auxiliary power supply cores 15, which are symmetrically distributed along the center line of the functional line 3;

The charging communication core unit and the charging connection confirmation core unit are respectively located in the outer gap between the low-voltage auxiliary power supply core 15 and the second wrapping layer 16 .

The two low-voltage auxiliary power supply wire cores 15 in this embodiment are respectively the low-voltage auxiliary power supply positive wire core 151 and the low-voltage auxiliary power supply negative wire core 152. The cross-sectional area of the low-voltage auxiliary power supply wire core 15 is relatively large. 15 is symmetrically distributed along the center line of the functional cores. When the DC charging cable is subjected to external force, a part of the external force is distributed to the low-voltage auxiliary power core 15, which can effectively reduce the charging communication core unit and the charging connection confirmation core. The stress of the unit, thereby improving the drag resistance of the DC charging cable and increasing the service life of the DC charging cable.

Further, the shielding layer 17 is a braided layer made of copper wires or tinned copper wires, and the angle between the two copper wires or tinned copper wires that meet each other is 15°-35°.

The braided layer made of copper wire or tinned copper wire is used as the shielding layer 17, which can prevent the strong electric signal of the DC power line core 2 from interfering with the weak electric signal of the functional line 3. Moreover, the angle of the two copper wires or tinned copper wires intersecting each other is 15°-35°, so that the shielding layer 17 has better bending performance.

Further, referring to FIG. 3 and FIG. 4 , the charging communication core unit is composed of a charging communication positive core 13 , a charging communication negative core 12 and a third filling layer 20 twisted and then applied with a fourth wrapping layer 19 .

The charging connection confirming core unit is composed of two charging connection confirming cores 14 and the third filling layer 20 twisted and then applied with a fourth wrapping layer 19 .

The charging communication core unit and the charging confirmation core unit can be made of twisted pairs, which can not only resist part of the electromagnetic wave interference from the outside, but also reduce the mutual interference between the twisted wires.

Further, the DC power line core 2, the protective grounding line core 1, the charging communication positive line core 13, the charging communication negative line core 12, the charging connection confirmation line core 14 and the low-voltage auxiliary line core The power cores 15 are all composed of conductors 6 , conductor tapes 7 , insulating layers 8 and insulating tapes 9 .

Further, the first wrapping layer 5 and the second wrapping layer 16 are non-woven fabric layers with a thickness of 0.1 mm;

The third wrapping layer 18, the fourth wrapping layer 19 and the insulating wrapping tape 9 are made of polytetrafluoroethylene, polypropylene or nylon materials;

Since polytetrafluoroethylene, polypropylene or nylon materials have self-lubricating properties and good mechanical properties, they can maintain good relative slippage between the layers, thereby protecting the insulating layer 8 and the sheath 10 from frequent bending The friction damage caused by the displacement can also protect the insulating layer 8 and the sheath 10 from being damaged by broken copper wires or tinned copper wires of the shielding layer 17, thereby increasing the service life of the DC charging cable.

The conductor wrapping tape 7 is a polyester tape with a thickness of 0.06 mm or a non-woven fabric tape with a thickness of 0.1 mm;

The polyester tape and non-woven tape have the advantages of moisture resistance, flexibility, light weight and high temperature resistance, which make the conductor 6 have flexibility, tightness and stability, and ensure the bending and compression resistance of the DC charging cable.

The insulating layer 8 is made of ethylene-propylene rubber mixture or thermoplastic elastomer;

The insulating layer 8 is extruded from ethylene-propylene rubber mixture or thermoplastic elastomer with a working temperature of 90°C. Under the same cross-sectional area of the cable, the ability of the DC charging cable to transmit current can be increased, and it has excellent electrical insulation, high temperature resistance, Anti-drag and weather resistance, more suitable for frequent moving and dragging environment, and good processing performance.

The sheath 10 consists of a synthetic elastomer. The synthetic elastomer can be chlorosulfurized polyethylene rubber with an operating temperature of 90° C. or other equivalent synthetic elastomers, thermoplastic elastomers (TPE) or polyurethane elastomers (TPU) that match the insulating layer 8 . The above-mentioned synthetic elastomer has good comprehensive properties of flexibility, drag resistance, oxidation resistance, wear resistance, high and low temperature resistance, chemical corrosion resistance, and flame retardancy, ensuring the maximum adaptability of the DC charging cable to the laying environment .

The first filling layer 4 is made of polypropylene filling rope, flame retardant rubber filling strip or flame retardant filling rope;

The filler layer can make the cable round as a whole, and the filler can fix the cores well so that they do not slide against each other, and the structural gap after cable formation is completely filled and dense, and the overall structure is compact, safe and stable. Polypropylene filled rope, flame retardant rubber filled strip or flame retardant filled rope is resistant to aging, has good elasticity, good softness, excellent tensile and tear resistance properties, so that the cable as a whole has good resistance to twisting and bending.

The second filling layer 11 and the third filling layer 20 are made of aramid fiber.

Aramid yarn is a new type of high-tech synthetic fiber with excellent properties such as ultra-high strength, high modulus, high temperature resistance, acid and alkali resistance, and light weight. 2 to 3 times that of fiber, twice the toughness of steel wire, and only about 1/5 of the weight of steel wire. The second filling layer 11 and the third filling layer 20 made of aramid yarn greatly enhance the mechanical strength and flexibility of the functional line 3, and at the same time cooperate with the low-voltage auxiliary power line core 15 to protect the charging and communication main line in the functional line 3 The core 13, the charging communication negative core 12 and the charging connection confirming core 14 can prevent damage by external mechanical forces such as dragging, bending or twisting, thereby increasing the service life.

Further, the conductor 6 is formed by twisting a plurality of oxygen-free copper wires or by compound twisting of strands;

When the conductor 6 is formed by compound twisting of multiple strands, each strand is formed by twisting oxygen-free copper wires, and the twisting direction of the oxygen-free copper wires is opposite to the direction of compound twisting of the strands.

Conductor 6 adopts the fifth or sixth tinned or non-tinned oxygen-free copper wire in accordance with GB/T3956 "Cable Conductor", which ensures that conductor 6 does not turn black for a long time at high temperature, and at the same time ensures that conductor 6 has low resistance and high Conductivity, reduce the heat generated by the DC charging cable, and increase the flexibility and bendability of the conductor 6. The stranding direction of the oxygen-free copper wire of a strand is opposite to the direction of the composite stranding of the strands, which can increase the stability of the conductor 6 .

It can be known from the above technical solutions that this application provides a DC charging cable for electric vehicles, which includes the charging communication core with the smallest cross-section and the charging connection confirmation core, the low-voltage auxiliary power core 15 with a relatively small cross-section, and the second filling layer 11 is twisted into a functional wire core, compared with the separate charging communication wire core, charging connection confirmation wire core and low-voltage auxiliary power wire core 15, the mechanical strength of each wire core is improved, and the functional wire core has a larger cross-section. The equivalent mechanical strength of the DC power core 2 and the protective grounding core 1 balances the stress on the cable, especially improves the drag resistance of the charging communication core and the charging connection confirmation core, effectively preventing the charging communication core and the charging connection from being damaged. Confirm that the wire core is broken due to excessive external force to prolong the service life of the DC charging cable.

Claims (10)

1. a kind of direct current charging cable for electric automobile, including cable main, be arranged on outside the cable main it is first wrapped Layer (5) and the sheath (10) for being arranged on the first lapping layer (5) outside, it is characterised in that

The cable main include the cable core that is made up of dc source core (2), protective grounding core (1) and functional line (3) with And the first packed layer (4) set between the cable core and the first lapping layer (5)；

The functional line (3) include function core and coated successively outside the function core the second lapping layer (16), Screen layer (17) and the 3rd lapping layer (18)；

The function core is by charging order wire core unit, charging connection confirmation unit core unit, low pressure accessory power supply core (15) and the second packed layer (11) is twisted composition.

2. direct current charging cable for electric automobile as claimed in claim 1, it is characterised in that the dc source core (2) is Two, and be symmetric along the center line of the cable main；

The protective grounding core (1) and functional line (3) are respectively positioned at the dc source core (2) and first lapping layer (5) in the outer gap between.

3. direct current charging cable for electric automobile as claimed in claim 1, it is characterised in that the low pressure accessory power supply core (15) it is two, and is symmetric along the center line of the functional line (3)；

The charging order wire core unit and charging connection confirm that core unit is located at the low pressure accessory power supply core respectively (15) in the outer gap between the second lapping layer (16).

4. direct current charging cable for electric automobile as claimed in claim 1, it is characterised in that the screen layer (17) by copper wire or The braiding layer that tinned copper wire is formed, two copper wires or the angle of tinned copper wire to cross each other are 15⁰-35⁰。

5. the direct current charging cable for electric automobile as described in claim any one of 1-4, it is characterised in that the charging order wire Core unit by charging communicate positive core (13), charging communication negative wire core (12) and the 3rd packed layer (20) be twisted the after-applied 4th around Covering (19) forms.

6. direct current charging cable for electric automobile as claimed in claim 5, it is characterised in that the charging connection confirms core list Member confirms that core (14) and the 3rd packed layer (20) are twisted after-applied 4th lapping layer (19) and formed by two charging connections.

7. direct current charging cable for electric automobile as claimed in claim 6, it is characterised in that the dc source core (2), institute State protective grounding core (1), the positive core (13) of the charging communication, the charging communication negative wire core (12), the charging connection Confirm core (14) and the low pressure accessory power supply core (15) by conductor (6), conductor band (7), insulating barrier (8) and insulation Band (9) forms.

8. direct current charging cable for electric automobile as claimed in claim 7, it is characterised in that first lapping layer (5) and Two lapping layers (16) are the nonwoven layer that thickness is 0.1mm；

3rd lapping layer (18), the 4th lapping layer (19) and type insulating wrapping strip (9) use polytetrafluoroethylene (PTFE), polypropylene or nylon Material is made；

The conductor band (7) be thickness be 0.06mm polyester belt or thickness be 0.1mm nonwoven fabric belts；

The insulating barrier (8) is made up of EP rubbers mixture or thermoplastic elastomer；

The sheath (10) is made up of synthetic elastomer.

9. direct current charging cable for electric automobile as claimed in claim 7, it is characterised in that first packed layer (4) is by gathering Propylene gasket for packing, flame retardant rubber packing or flame resistant filler rope are formed；

Second packed layer (11) and the 3rd packed layer (20) are made up of aramid fiber yarn.

10. direct current charging cable for electric automobile as claimed in claim 7, it is characterised in that the conductor (6) is by more anaerobics Copper wire is twisted to be formed or is made up of compound be twisted of a plurality of strand；

When conductor (6) by a plurality of strand it is compound it is twisted form when, every strand is twisted by copper free wire, the anaerobic The direction of lay of copper wire and strand are compound twisted in opposite direction.