CN118866458A - Flame retardant rubber flexible cable for charging pile - Google Patents

Abstract

The application relates to a flame-retardant rubber flexible cable for a charging pile, which belongs to the technical field of charging pile cables and comprises a sheath, wherein a plurality of power lines and a plurality of grounding lines are arranged in the sheath in a penetrating manner, braided shielding layers are wrapped on the power lines and the grounding lines, and an electromagnetic wave shielding layer is arranged in the sheath. The application has the effects of improving the electromagnetic wave interference resistance of the cable wire core, reducing the interference of electromagnetic waves on the signal group wire of the temperature measuring unit, and being beneficial to ensuring the normal self-outage after the temperature measurement is overheated.

Description

Flame retardant rubber flexible cable for charging pile

Technical Field

The present application relates to the technical field of charging pile cables, and in particular to a flame-retardant rubber flexible cable for a charging pile.

Background Art

Charging piles usually refer to charging equipment that provides charging services for electric vehicles. When an electric vehicle needs to be charged, a charging pile cable is used to connect the charging pile to the electric vehicle. In order to meet the needs of fast charging, the charging pile cable usually has a large overcurrent and high voltage, which makes the charging pile cable prone to high heat generation.

At present, in order to improve charging safety, a temperature measuring unit is usually installed on the charging pile cable. The temperature measuring unit mainly uses temperature measuring optical fiber or measures the resistance change of the wire core to achieve temperature monitoring. When the measured cable temperature is too high, the power is automatically cut off.

During the charging process, due to the strong interference ability of the electromagnetic wave signal in the core of the charging pile cable, it is easy to cause the temperature measurement to not automatically cut off the power even after overheating.

Summary of the invention

In order to help improve the cable core's ability to resist electromagnetic interference, reduce the impact of electromagnetic waves on the temperature measuring unit, and to ensure to a certain extent that the power can be automatically cut off after the temperature measurement is overheated, the present application provides a flame-retardant rubber soft cable for charging piles.

The flame retardant rubber flexible cable for charging piles provided in this application adopts the following technical solution:

The flame-retardant rubber soft cable for a charging pile comprises a sheath, wherein a plurality of power lines and a plurality of grounding lines are passed through the sheath, wherein the power lines and the grounding lines are both wrapped with a braided shielding layer, and an electromagnetic wave shielding layer is arranged in the sheath.

By adopting the above technical scheme, the braided shielding layer can effectively reduce the interference of the electromagnetic waves of the power line to the grounding wire and the interference to the signal group line of the temperature measuring unit, thereby helping to improve the anti-electromagnetic interference ability of the wire core. The electromagnetic wave shielding layer reduces the interference of external electromagnetic waves to the signal group line of the temperature measuring unit, which is not easy to affect the operation of the temperature measuring unit, and to a certain extent ensures that the power can be automatically cut off normally after the temperature measurement is overheated.

Preferably, the electromagnetic wave shielding layer comprises a carbon fiber layer and an aluminum foil layer arranged in the sheath, and the carbon fiber layer is wrapped outside the aluminum foil layer.

By adopting the above technical solution, a carbon fiber layer is arranged in the sheath, and the carbon fiber layer is arranged on the outer layer of the aluminum foil layer, so that the carbon fiber layer can effectively absorb external electromagnetic waves. After being absorbed by the carbon fiber layer, the residual electromagnetic waves are reflected by the surface of the aluminum foil layer and absorbed by the carbon fiber layer again, which helps to ensure the electromagnetic wave anti-interference ability of the wire core, reduce the influence of electromagnetic waves on the temperature measuring unit, and to a certain extent ensure that the temperature measurement can be powered off normally after overheating.

Preferably, a surface of the carbon fiber layer close to the aluminum foil layer is configured to be wavy.

By adopting the above technical solution, the wavy surface helps to absorb residual electromagnetic waves at various angles reflected on the aluminum foil layer, thereby improving the electromagnetic wave absorption capacity of the carbon fiber layer, and further helping to improve the anti-electromagnetic interference capability of the wire core in the sheath.

Preferably, a plurality of support groups are provided on a side of the aluminum foil layer close to the carbon fiber layer, and the support groups correspond one-to-one to the recesses on the wavy surface of the carbon fiber layer. Each of the support groups includes a plurality of support soft rods arranged on the aluminum foil layer, and the plurality of support soft rods are arranged at intervals along the length direction of the cable, and one end of the support soft rod away from the aluminum foil layer is arranged on the recess corresponding to the wavy surface of the carbon fiber layer.

By adopting the above technical solution, the supporting soft rod is arranged between the aluminum foil layer and the concave part of the wavy surface of the carbon fiber layer, so that there is a certain gap on the side of the carbon fiber layer close to the aluminum foil layer, and the carbon fiber layer is not easy to completely fit on the surface of the aluminum foil layer, thereby ensuring the shape of the wavy surface of the carbon fiber layer, and further helping to ensure the electromagnetic wave absorption effect of the carbon fiber layer.

Preferably, the sheath comprises an outer sheath and an inner sheath, and the carbon fiber layer and the aluminum foil layer are located between the inner sheath and the outer sheath.

By adopting the above technical solution, the outer sheath and the inner sheath can effectively protect the carbon fiber layer and the aluminum foil layer; at the same time, the softness of the cable can be ensured, providing convenience for practical use.

Preferably, the plurality of power lines and the plurality of grounding lines are spaced apart and distributed along the circumferential direction of the axis of the sheath, and the power lines and the grounding lines are staggered.

By adopting the above technical solution, the power line and the grounding line are symmetrically staggered in the sheath, so that the sensitivity of the wire core to external electromagnetic waves is reduced, which helps to improve the anti-interference ability of the cable.

Preferably, the power line includes a tinned conductor and an EPDM rubber insulation layer wrapped around the tinned conductor, and the braided shielding layer is wrapped around the EPDM rubber insulation layer.

Preferably, the grounding wire comprises a plurality of fluoroplastic cores and a fluoroplastic layer wrapped around the plurality of fluoroplastic cores, the braided shielding layer is wrapped around the plurality of fluoroplastic cores, and the fluoroplastic layer is wrapped around the braided shielding layer.

Preferably, the center of the sheath is filled with semi-conductive glue extruded from steel wire, and the semi-conductive glue extruded from steel wire separates the multiple power lines. One side of the power line is fitted with the semi-conductive glue extruded from steel wire, and the other side abuts against the inner wall of the sheath. One side of the grounding wire is fitted with the semi-conductive glue extruded from steel wire, and the other side abuts against the inner wall of the sheath.

By adopting the above technical solution, the semi-conductive adhesive extruded from the steel wire can position and relatively fix the power line and the grounding line, so that the wire core is not easily entangled in the sheath; at the same time, the semi-conductive adhesive extruded from the steel wire has a good flame retardant effect, which helps to improve safety.

Preferably, a cooling channel for circulating coolant is provided in the steel wire extruded semi-conductive adhesive, a heat conducting sheet is provided on the cooling channel, the heat conducting sheet corresponds to the power line one by one, and the heat conducting sheet abuts against the corresponding power line.

By adopting the above technical solution, the heat generated on the power line is transferred to the cooling channel through the heat conducting plate, and the coolant flowing in the cooling channel takes away the heat on the heat conducting plate, thereby dissipating the heat of the power line and effectively reducing the occurrence of accidents.

In summary, this application includes the following beneficial technical effects:

The braided shielding layer can effectively reduce the interference of the electromagnetic waves of the power line to the grounding wire and the interference to the signal line of the temperature measuring unit, thereby helping to improve the anti-electromagnetic interference ability of the wire core. The electromagnetic wave shielding layer reduces the interference of external electromagnetic waves on the signal line of the temperature measuring unit, which is not easy to affect the work of the temperature measuring unit. To a certain extent, it ensures that the power can be cut off normally after the temperature measurement is overheated.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic plan view of the overall structure of an embodiment of the present application.

FIG. 2 is a schematic plan view of the overall structure of the steel wire extruded semi-conductive adhesive in an embodiment of the present application.

Explanation of the reference numerals: 1. sheath; 101. outer sheath; 102. inner sheath; 2. power line; 21. tinned conductor; 22. EPDM rubber insulation layer; 3. grounding wire; 31. fluoroplastic core; 32. fluoroplastic layer; 4. braided shielding layer; 5. carbon fiber layer; 6. aluminum foil layer; 7. supporting soft rod; 8. steel wire extruded semi-conductive glue; 9. cooling channel; 10. first arc-shaped fitting surface; 11. thermal conductive sheet; 111. thermal conductive connecting sheet; 112. thermal conductive fitting sheet; 12. second arc-shaped fitting surface.

DETAILED DESCRIPTION

The present application is further described in detail below in conjunction with Figures 1-2.

The embodiment of the present application discloses a flame retardant rubber flexible cable for a charging pile. Referring to Figure 1, the flame retardant rubber flexible cable for a charging pile includes a sheath 1, the sheath 1 includes an outer sheath 101 and an inner sheath 102, the outer sheath 101 is wrapped outside the inner sheath 102, the cross-sections of the inner sheath 102 and the outer sheath 101 are both circular, the inner sheath 102 and the outer sheath 101 can be made of polyvinyl chloride, polyethylene and other materials, without limitation, so as to ensure the flexibility of the cable and facilitate dragging for use; the outer diameter of the outer sheath 101 is 34mm-36mm.

Referring to Figure 1, multiple power lines 2 and multiple grounding lines 3 are inserted into the inner sheath 102. The power line 2 mainly refers to the main conductor used to transmit electric energy, which plays the role of connecting the power output end to the charging interface of the electric vehicle; the grounding line 3 mainly refers to the line used to connect the equipment or system to the ground, which plays a protective role. The power line 2 and the grounding line 3 are both wrapped with a braided shielding layer 4. The braided shielding layer 4 is wrapped with a semi-conductive tape and woven with tinned copper wire, and has good shielding ability. An electromagnetic wave shielding layer is arranged between the inner sheath 102 and the outer sheath 101.

When in use, the braided shielding layer 4 can effectively reduce the interference of the electromagnetic waves of the power line 2 on the grounding wire 3, as well as the interference of the electromagnetic waves of the power line 2 on the signal group line of the temperature measuring unit. The electromagnetic wave shielding layer helps to reduce the interference of external electromagnetic waves on the signal group line of the temperature measuring unit, improves the anti-electromagnetic interference ability of the wire core inside the sheath 1, reduces the impact of electromagnetic waves on the operation of the temperature measuring unit, helps to ensure that the power can be cut off normally after the temperature measurement is overheated, and reduces the occurrence of accidents; at the same time, it makes the grounding protection safer.

Referring to Figure 1, multiple power lines 2 are evenly spaced apart along the circumferential direction of the axis of the sheath 1, and multiple grounding wires 3 are also evenly spaced apart along the circumferential direction of the axis of the sheath 1. In the embodiment of the present application, three groups of power lines 2 are provided, and three groups of grounding wires 3 are also provided; the grounding wires 3 and the power lines 2 are staggered, and the outer diameter of the power lines 2 is larger than the outer diameter of the grounding wires 3; the distance from the center of the power line 2 to the center of the inner sheath 102 is smaller than the distance from the center of the grounding wire 3 to the center of the inner sheath 102, so that the grounding wire 3 is located on the side of the inner sheath 102 close to the inner wall.

By staggering and symmetrically arranging the power line 2 and the ground line 3 in the inner sheath 102, it helps to reduce mutual interference between the wire cores and reduce the sensitivity of the cable to external electromagnetic waves, thereby helping to improve the anti-interference ability of the cable.

1 , the power line 2 includes a tinned conductor 21 and an EPDM insulation layer 22 wrapped around the tinned conductor 21, and a braided shielding layer 4 is wrapped around the EPDM insulation layer 22. The EPDM has good electrical insulation performance, high temperature resistance, chemical corrosion resistance, wear resistance, softness and flexibility, and can better protect the tinned conductor 21, ensure the softness of the cable, and facilitate dragging and use.

Referring to Fig. 1, the grounding wire 3 includes a plurality of fluoroplastic cores 31 and a fluoroplastic layer 32 wrapped around the plurality of fluoroplastic cores 31. The fluoroplastic cores 31 refer to cores of metal conductors wrapped with fluoroplastics. The number of fluoroplastic cores 31 in the fluoroplastic layer 32 can be set as needed. In the embodiment of the present application, four fluoroplastic cores 31 are provided in two groups of grounding wires 3, and five fluoroplastic cores 31 are provided in the remaining group of grounding wires 3. The braided shielding layer 4 is wrapped around the plurality of fluoroplastic cores 31, and the fluoroplastic layer 32 is wrapped around the braided shielding layer 4. The fluoroplastic layer 32 has excellent high temperature resistance, chemical corrosion resistance, electrical insulation, weather resistance and flame retardant properties, which helps to protect the braided shielding layer 4, ensure the flame retardant effect of the cable, and reduce the occurrence of accidents.

1 and 2 , the center of the sheath 1 is filled with a steel wire extruded semi-conductive adhesive 8, which refers to a semiconductor adhesive strip extruded from multiple strands of soft steel wire ropes, and has good flame retardant properties; the steel wire extruded semi-conductive adhesive 8 separates multiple power lines 2, which helps to reduce mutual interference between the wire cores; the steel wire extruded semi-conductive adhesive 8 has a first arc-shaped fitting surface 10 and a second arc-shaped fitting surface 12, the first arc-shaped fitting surface 10 corresponds to the power line 2 one by one, and the second arc-shaped fitting surface 12 corresponds to the grounding line 3 one by one, one side of the power line 2 is fitted and abutted against the corresponding first arc-shaped fitting surface 10, and the other side is abutted against the inner wall of the inner sheath 102, one side of the grounding line 3 is fitted and abutted against the corresponding second arc-shaped fitting surface 12, and the other side is abutted against the inner wall of the inner sheath 102, so that the power line 2 and the grounding line 3 are positioned and fixed by the steel wire extruded semi-conductive adhesive 8, so that the power line 2 and the grounding line 3 are not easily entangled in the inner sheath 102.

1 , the electromagnetic wave shielding layer includes a carbon fiber layer 5 and an aluminum foil layer 6 arranged between an inner sheath 102 and an outer sheath 101, the aluminum foil layer 6 wraps the inner sheath 102, the carbon fiber layer 5 is wrapped outside the aluminum foil layer 6, and the outer sheath 101 wraps the carbon fiber layer 5; one side of the carbon fiber layer 5 close to the aluminum foil layer 6 is set to a wavy shape, and the curvature of the wavy surface and the distance between the wavy surface and the aluminum foil layer 6 can be set according to actual needs; one side of the aluminum foil layer 6 close to the carbon fiber layer 5 is provided with a plurality of support groups, and the plurality of support groups are spaced apart along the circumferential direction of the carbon fiber layer 5, and the support groups correspond one-to-one to the concave parts of the wavy surface of the carbon fiber layer 5.

Referring to Figure 1, each support group includes a plurality of support soft rods 7 fixed on the aluminum foil layer 6. The support soft rods 7 are made of polyvinyl chloride rods. The plurality of support soft rods 7 are arranged at intervals along the length direction of the cable. The side of the support soft rods 7 away from the aluminum foil layer 6 is fixed on the concave corresponding to the carbon fiber layer 5. Both ends of the support soft rods 7 are set to convex arc surfaces. The plurality of support soft rods 7 support the carbon fiber layer 5, so that the carbon fiber layer 5 is not easily squeezed and is completely fitted with the aluminum foil layer 6, maintaining the shape of the wavy surface of the carbon fiber layer 5, thereby helping to ensure the absorption effect of the carbon fiber layer 5 on electromagnetic waves, while improving the structural strength of the cable. In other embodiments, the plurality of support soft rods 7 of each support group can be replaced by support bars arranged between the aluminum foil layer 6 and the wavy surface concave.

When in use, the external electromagnetic waves are first absorbed by the carbon fiber layer 5, and then the residual electromagnetic waves are reflected on the surface of the aluminum foil layer 6. The reflected electromagnetic waves are absorbed again by the carbon fiber layer 5. Since the side of the carbon fiber layer 5 close to the aluminum foil layer 6 is a wavy surface, the wavy surface can fully absorb the reflected electromagnetic waves at various angles, thereby improving the absorption capacity of the carbon fiber layer 5 and ensuring the anti-electromagnetic interference ability of the cable. The carbon fiber layer 5 and the aluminum foil layer 6 are arranged between the inner sheath 102 and the outer sheath 101, which helps to protect the inner sheath 102 and the outer sheath 101, and at the same time can ensure the flexibility of the cable, providing convenience for use.

1 and 2 , a cooling channel 9 for circulating coolant is provided in the steel wire extruded semi-conductive adhesive 8. The cooling channel 9 is located at the center of the inner sheath 102. One end of the cooling channel 9 is connected to a coolant input pipe (not shown in the figure) to input coolant into the cooling channel 9, and the other end is connected to a coolant output pipe (not shown in the figure) to facilitate the outflow of coolant. Specifically, the coolant input pipe and the coolant output pipe can be passed through the sheath 1 and connected to external equipment to realize the circulation of the coolant.

Referring to Figures 1 and 2, a heat-conducting sheet 11 is fixedly provided on the cooling channel 9, and the heat-conducting sheet 11 corresponds to the power line 2 one by one, and the heat-conducting sheet 11 abuts against the corresponding power line 2; the heat-conducting sheet 11 includes a heat-conducting connecting sheet 111 and a heat-conducting bonding sheet 112, and the heat-conducting connecting sheet 111 is fixedly provided on the cooling channel 9, and the heat-conducting connecting sheet 111 extends along the length direction of the cooling channel 9, and the heat-conducting connecting sheet 111 passes through the steel wire extruded semi-conductive glue 8 close to the corresponding power line 2; the heat-conducting bonding sheet 112 is fixed on the end of the heat-conducting connecting sheet 111 away from the cooling channel 9, and the heat-conducting bonding sheet 112 is arranged along the corresponding first arc-shaped bonding surface 10, and the heat-conducting bonding sheet 112 abuts against and fits against the outer wall of the corresponding power line 2. The heat-conducting connecting sheet 111 and the heat-conducting bonding sheet 112 can be one of aluminum sheets and copper sheets, and are not limited here.

During the charging process, since the power line 2 carries the current load, the resistance generated when the current passes through the wire causes heat. The high temperature heat generated on the power line 2 is transferred to the heat-conducting connecting piece 111 through the heat-conducting bonding piece 112, and the heat-conducting connecting piece 111 transfers the heat to the cooling channel 9. When the temperature is overheated and the power is automatically cut off, the coolant is input into the cooling channel 9 through the coolant input pipe. The coolant flowing in the cooling channel 9 takes away the heat on the heat-conducting connecting piece 111, and then flows out from the coolant output pipe, thereby continuously taking away the heat on the heat-conducting connecting piece 111, dissipating the heat of the power line 2, and effectively reducing the occurrence of accidents.

The implementation principle of the embodiment of the present application is as follows: when in use, the braided shielding layer 4 can shield the wrapped wire core from electromagnetic interference signals, which can effectively reduce the interference of the electromagnetic waves of the power line 2 to the grounding line 3 on the one hand, and reduce the interference of electromagnetic waves to the signal group line of the temperature measuring unit on the other hand, which helps to improve the wire core's anti-electromagnetic interference ability and make the grounding protection safer; at the same time, the carbon fiber layer 5 absorbs the electromagnetic waves penetrated from the outside, and the residual interference electromagnetic waves after absorption are reflected on the surface of the aluminum foil layer 6, and then the reflected interference electromagnetic waves are further absorbed by the wavy surface of the carbon fiber layer 5, thereby effectively reducing the interference of external electromagnetic waves, further reducing the influence of electromagnetic wave signals on the operation of the temperature measuring unit, and to a certain extent ensuring that the power can be cut off normally after the temperature measurement is overheated.

When the temperature is measured to be overheated and the power is automatically cut off, the coolant is input into the cooling channel 9 through the coolant input pipe, and the high-temperature heat generated on the power line 2 is transferred to the heat-conducting connecting piece 111 through the heat-conducting bonding piece 112, and the heat-conducting connecting piece 111 then transfers the heat to the cooling channel 9. The coolant flowing in the cooling channel 9 takes away the heat on the heat-conducting connecting piece 111, thereby being able to dissipate the heat of the power line 2, effectively reducing the occurrence of accidents.

The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims (10)

1. The utility model provides a fill electric pile with fire-retardant rubber flexible cable which characterized in that: the novel electromagnetic shielding device comprises a sheath (1), wherein a plurality of power lines (2) and a plurality of grounding wires (3) are arranged in the sheath (1) in a penetrating mode, braided shielding layers (4) are wrapped on the power lines (2) and the grounding wires (3), and electromagnetic wave shielding layers are arranged in the sheath (1).

2. The flame retardant rubber flexible cable for a charging pile according to claim 1, wherein: the electromagnetic wave shielding layer comprises a carbon fiber layer (5) and an aluminum foil layer (6) which are arranged in the sheath (1), and the carbon fiber layer (5) is wrapped outside the aluminum foil layer (6).

3. The flame retardant rubber flexible cable for a charging pile according to claim 2, wherein: one surface of the carbon fiber layer (5) close to the aluminum foil layer (6) is provided with waves.

4. A flame retardant rubber flexible cable for a charging pile according to claim 3, wherein: the aluminum foil layer (6) is provided with multiunit support group near the one side of carbon fiber layer (5), support group and the concave part one-to-one of carbon fiber layer (5) wave surface, every group support group all including setting up a plurality of soft poles (7) of support on aluminum foil layer (6), a plurality of support soft pole (7) along the length direction interval arrangement of line, support soft pole (7) one end setting that keeps away from aluminum foil layer (6) on the concave part that carbon fiber layer (5) wave surface corresponds.

5. The flame retardant rubber flexible cable for a charging pile according to claim 2, wherein: the sheath (1) comprises an outer sheath (101) and an inner sheath (102), and the carbon fiber layer (5) and the aluminum foil layer (6) are positioned between the inner sheath (102) and the outer sheath (101).

6. The flame retardant rubber flexible cable for a charging pile according to claim 1, wherein: the power lines (2) and the grounding lines (3) are distributed at intervals along the circumferential direction of the axis of the sheath (1), and the power lines (2) and the grounding lines (3) are arranged in a staggered mode.

7. The flame retardant rubber flexible cable for a charging pile according to claim 1, wherein: the power line (2) comprises a tinned conductor (21) and an ethylene propylene rubber insulating layer (22) wrapped outside the tinned conductor (21), and the braided shielding layer (4) is wrapped outside the ethylene propylene rubber insulating layer (22).

8. The flame retardant rubber flexible cable for a charging pile according to claim 1, wherein: the grounding wire (3) comprises a plurality of fluoroplastic wire cores (31) and fluoroplastic layers (32) wrapping the fluoroplastic wire cores (31), the braided shielding layer (4) wraps the fluoroplastic wire cores (31), and the fluoroplastic layers (32) wrap the braided shielding layer (4).

9. The flame retardant rubber flexible cable for a charging pile according to any one of claims 1 to 8, wherein: the center of sheath (1) is filled with steel wire extrusion semi-conductive adhesive (8), steel wire extrusion semi-conductive adhesive (8) separates a plurality of power line (2), one side of power line (2) is laminated with steel wire extrusion semi-conductive adhesive (8), and the opposite side is laminated with sheath (1) inner wall butt, one side of earth connection (3) is laminated with steel wire extrusion semi-conductive adhesive (8), opposite side and sheath (1) inner wall butt.

10. The flame retardant rubber flexible cable for a charging pile according to claim 9, wherein: the cooling channel (9) for circulating cooling liquid is arranged in the steel wire extrusion semi-conductive adhesive (8) in a penetrating mode, the cooling channel (9) is provided with heat conducting fins (11) in a penetrating mode, the heat conducting fins (11) are in one-to-one correspondence with the power lines (2), and the heat conducting fins (11) are in butt joint with the corresponding power lines (2).