KR102440542B1 - Quick-charging cable for high capacity charging in electirc vehicles - Google Patents

Abstract

According to one embodiment of the present disclosure, a quick-charging cable for high-capacity charger for an electric vehicle includes: a plurality of electricity units for supplying electricity to the electric vehicle; and a cable sheath formed to cover an outer side of the plurality of electricity units. Each of the plurality of electricity units includes: conductor units; braided wires formed to cover the conductor unit; and insulation materials formed on the braided wires. The braided wires may form a passage so that cooling fluids can flow between the conductor units and the insulation materials.

Description

Fast charging cable for electric vehicle large-capacity charger {QUICK-CHARGING CABLE FOR HIGH CAPACITY CHARGING IN ELECTIRC VEHICLES}

The present disclosure relates to a fast charging cable for an electric vehicle large-capacity charger.

BACKGROUND ART An electric vehicle is a vehicle in which power is mainly obtained by driving an AC or DC motor using the power of a battery. Recently, as the seriousness of carbon emission has emerged due to environmental problems such as global warming and climate change, the supply and support of electric vehicles are expanding for carbon neutrality, and accordingly, the demand for electric vehicles is increasing.

Since the electric vehicle drives the motor by charging the battery, and the battery needs to be charged when the battery is consumed, the supply of charging stations for charging the battery of the electric vehicle is also increasing. In the past, it took about 4 to 9 hours to charge the battery, but recently, it takes about 15 to 30 minutes as fast chargers are popular.

Since a safety accident may occur if the battery is discharged while the electric vehicle is running on the road, a rapid charger capable of rapidly charging a large amount of power has been prepared in places where rapid charging is required, such as on a highway.

However, since the rapid charger supplies a large amount of current in a short time for rapid charging, heat may be generated in the charging cable for supplying power to the electric vehicle. As a result, the charging cable is damaged, the charging performance is deteriorated, and there is a risk of fire.

Accordingly, a cooling tube is inserted so that the cooling fluid can flow inside the charging cable to minimize heat generation, but the diameter of the charging cable is increased by the inserted cooling tube, and the weight of the charging cable is also increased, so that the user's convenience is improved. can be reduced.

Therefore, there is a need for a fast-charging cable for a large-capacity charger for an electric vehicle that efficiently cools the heat inside the charging cable when rapidly charging a large amount of power to an electric vehicle and improves charging performance while minimizing the outer diameter by reducing the conductor resistance of the cable. do.

Korean Patent Publication No. 10-2018-0096259

The present disclosure has been devised in response to the above-mentioned background technology, and it efficiently cools the heat inside the cable by using the braid formed inside the charging cable during large-capacity rapid charging for an electric vehicle, and reduces the conductor resistance of the cable to reduce the outer diameter We aim to provide a fast charging cable for large-capacity chargers for electric vehicles that can improve charging performance while minimizing it.

The technical problems of the present disclosure are not limited to the technical problems mentioned above, and other technical problems not mentioned will be clearly understood by those skilled in the art from the following description.

As a fast charging cable for a large-capacity charger for an electric vehicle according to an embodiment of the present disclosure for solving the above-described problems, a plurality of power units for supplying power to the electric vehicle; and a cable sheath formed to surround the outside of the plurality of power units, wherein each of the plurality of power units includes: a conductor unit; a braid formed to surround the conductor unit; and an insulation formed on the braid, wherein the braid may form a passage for a cooling fluid to flow between the conductor unit and the insulation.

In addition, the braid may include a plurality of stranded wires, the plurality of strands may be braided to form a net, and the plurality of strands may be twisted in a longitudinal direction of the plurality of strands.

In addition, the braid may be made of a predetermined braiding density to secure a space through which the cooling fluid can flow.

In addition, the braid includes an aggregate stranded wire formed by twisting a plurality of strands, a uni-lay stranded wire formed by twisting a plurality of strands in a uni-lay structure, and a plurality of copper clad aluminum (CCA) wires. It may be formed of at least one of a CCA twisted wire formed by twisting, a CCA aggregate twisted wire formed by twisting a plurality of CCA wires, or a CCA uni-lay twisted wire formed by twisting a CCA wire arranged in a uni-lay structure.

In addition, the conductor unit is made of a composite stranded wire including a plurality of stranded wires, and the composite stranded wire is at least one of an aggregate stranded wire formed by twisting a plurality of stranded wires or a uni-lay stranded wire formed by twisting a plurality of stranded wires in a uni-lay structure. can be made into one.

In addition, the fast charging cable for the electric vehicle large-capacity charger, inside the cable sheath, a signal unit configured to perform signal exchange or communication with the electric vehicle; grounding unit for grounding; and a recovery unit configured to recover the cooling fluid.

The technical solutions obtainable in the present disclosure are not limited to the above-mentioned solutions, and other solutions that are not mentioned are clearly to those of ordinary skill in the art to which the present disclosure belongs from the description below. can be understood

According to some embodiments of the present disclosure, in the fast charging cable for a large-capacity charger for an electric vehicle, the braid disposed on the outer surface of the conductor unit directly cools the conductor unit during large-capacity rapid charging for the electric vehicle, thereby increasing the cooling effect. .

In addition, according to some embodiments of the present disclosure, a fast charging cable for a large-capacity charger for an electric vehicle may reduce heat generation of a conductor to prevent thermal damage to the charging cable and prevent safety accidents such as fire.

In addition, according to some embodiments of the present disclosure, in the fast charging cable for the electric vehicle large capacity charger, the cooling fluid flows through the space formed by braiding without a separate pipe for flowing the cooling fluid, thereby minimizing the outer diameter of the charging cable. User convenience may be improved.

In addition, according to some embodiments of the present disclosure, in the fast charging cable for a large-capacity charger for an electric vehicle, the braid made of a conductor having conductivity is disposed so that at least a part of the braid is in contact with the outer surface of the conductor unit, so that the cross-sectional area of the conductor is increased, so that the electric loss This can be reduced to improve the performance of the charging cable.

In addition, when charging large-capacity electric vehicles, the braid formed inside the charging cable is used to efficiently cool the heat inside the cable, and the conductor resistance of the cable is reduced to minimize the outer diameter while improving the charging performance. A fast charging cable for the charger can be provided.

The effects obtainable in the present disclosure are not limited to the above-mentioned effects, and other effects not mentioned will be clearly understood by those of ordinary skill in the art to which the present disclosure belongs from the description below. .

Various aspects are now described with reference to the drawings, wherein like reference numerals are used to refer to like elements collectively. In the following example, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of one or more aspects. It will be evident, however, that such aspect(s) may be practiced without these specific details.
1 is an exemplary view of a fast charging system for an electric vehicle large-capacity charger according to an embodiment of the present disclosure.
2 is a schematic cross-sectional view of a charging cable according to an embodiment of the present disclosure.
3 is a schematic perspective view of a charging cable according to an embodiment of the present disclosure;
4 is a schematic cross-sectional view illustrating a power unit according to an embodiment of the present disclosure.
5 is a schematic perspective view illustrating a power unit according to an embodiment of the present disclosure;
6 is a schematic side view illustrating a braid according to an embodiment of the present disclosure;
7 is a schematic cross-sectional view of a charging cable according to another embodiment of the present disclosure.
8 is a schematic perspective view of a charging cable according to an embodiment of the present disclosure;
9 is a schematic cross-sectional view illustrating a power unit according to another embodiment of the present disclosure.
10 is a schematic perspective view illustrating a power unit according to another embodiment of the present disclosure;
11 is a schematic cross-sectional view of a charging cable according to another embodiment of the present disclosure;
12 is a schematic perspective view of a charging cable according to another embodiment of the present disclosure;
13 is a schematic cross-sectional view illustrating a first power unit according to another embodiment of the present disclosure.
14 is a schematic perspective view illustrating a first power unit according to another embodiment of the present disclosure;
15 is a schematic side view illustrating a first braid according to another embodiment of the present disclosure;
16 is a schematic cross-sectional view illustrating a second power unit according to another embodiment of the present disclosure.
17 is a schematic perspective view illustrating a second power unit according to another embodiment of the present disclosure;
18 and 19 are schematic perspective views of a charging cable according to various embodiments.

Various embodiments and/or aspects are now disclosed with reference to the drawings. In the following description, for purposes of explanation, numerous specific details are set forth to provide a thorough understanding of one or more aspects. However, it will also be appreciated by one of ordinary skill in the art that such aspect(s) may be practiced without these specific details. The following description and accompanying drawings set forth in detail certain illustrative aspects of one or more aspects. These aspects are illustrative, however, and some of the various methods in principles of various aspects may be employed, and the descriptions set forth are intended to include all such aspects and their equivalents. Specifically, as used herein, “embodiment”, “example”, “aspect”, “exemplary”, etc. is not to be construed as an advantage or advantage of any aspect or design described over other aspects or designs. It may not be.

Hereinafter, the same or similar components are assigned the same reference numerals regardless of reference numerals, and redundant description thereof will be omitted. In addition, in describing the embodiments disclosed in the present specification, if it is determined that detailed descriptions of related known technologies may obscure the gist of the embodiments disclosed in the present specification, the detailed description thereof will be omitted. In addition, the accompanying drawings are only for easy understanding of the embodiments disclosed in the present specification, and the technical ideas disclosed in the present specification are not limited by the accompanying drawings.

Although the first, second, etc. are used to describe various elements or elements, these elements or elements are not limited by these terms, of course. These terms are only used to distinguish one element or component from another. Accordingly, it goes without saying that the first element or component mentioned below may be the second element or component within the spirit of the present invention.

Unless otherwise defined, all terms (including technical and scientific terms) used herein may be used with the meaning commonly understood by those of ordinary skill in the art to which the present invention belongs. In addition, terms defined in a commonly used dictionary are not to be interpreted ideally or excessively unless clearly defined in particular.

In addition, the term “or” is intended to mean an inclusive “or” rather than an exclusive “or.” That is, unless otherwise specified or clear from context, "X employs A or B" is intended to mean one of the natural implicit substitutions. That is, X employs A; X employs B; or when X employs both A and B, "X employs A or B" may apply to either of these cases. It should also be understood that the term “and/or” as used herein refers to and includes all possible combinations of one or more of the listed related items.

Also, the terms "comprises" and/or "comprising" mean that the feature and/or element is present, but excludes the presence or addition of one or more other features, elements and/or groups thereof. should be understood as not

Also, unless otherwise specified or unless it is clear from context to refer to a singular form, the singular in the specification and claims should generally be construed to mean “one or more”.

In addition, as used herein, the terms “information” and “data” may often be used interchangeably.

The suffixes "module" and "part" for the components used in the following description are given or used in consideration of ease of writing the specification, and do not have a meaning or role distinct from each other by themselves.

Objects and effects of the present disclosure, and technical configurations for achieving them will become clear with reference to the embodiments described below in detail in conjunction with the accompanying drawings. In describing the present disclosure, if it is determined that a detailed description of a well-known function or configuration may unnecessarily obscure the subject matter of the present disclosure, the detailed description thereof will be omitted. In addition, the terms described below are terms defined in consideration of functions in the present disclosure, which may vary according to intentions or customs of users and operators.

However, the present disclosure is not limited to the embodiments disclosed below and may be implemented in various different forms. Only the present embodiments are provided so that the present disclosure is complete, and to fully inform those of ordinary skill in the art to which the present disclosure belongs, the scope of the disclosure, and the present disclosure is only defined by the scope of the claims . Therefore, the definition should be made based on the content throughout this specification.

When the term “about” or “approximately” is used in this disclosure with reference to a numerical value, that numerical value is intended to include ±10% deviations around the recited numerical value.

1 is an exemplary view of a fast charging system for an electric vehicle large-capacity charger according to an embodiment of the present disclosure.

Referring to FIG. 1 , a fast charging system for a large-capacity charger for an electric vehicle includes an electric vehicle 10 and a fast charger 20 . For large-capacity rapid charging of the electric vehicle 10 , the rapid charger 20 is connected to the electric vehicle 10 through the cable connector 30 and the charging cable 100 .

The cable connector 30 is mounted on a charging connector (not shown) provided in the electric vehicle 10 , and electricity may be supplied to the electric vehicle 10 through the charging cable 100 .

When a large amount of power is rapidly charged to the electric vehicle 10 , a large amount of current is supplied in a short time, so that heat may be generated in the charging cable 100 . This heat can damage the charging cable or cause a fire.

In order to solve this problem, according to an embodiment of the present disclosure, a charging cable having improved performance by reducing conductor resistance while directly cooling a heating conductor is provided.

Hereinafter, the structure of the above-described charging cable will be described in detail with reference to FIGS. 2 and 3 .

2 is a schematic cross-sectional view of a charging cable according to an embodiment of the present disclosure, and FIG. 3 is a schematic perspective view of a charging cable according to an embodiment of the present disclosure.

2 and 3, the charging cable 100 includes a plurality of power units 110a and 110b, a grounding unit 120, a plurality of signal units 130a and 130b, a recovery unit 140 and a cable sheath ( cable sheath) 150 . The components shown in FIG. 1 are exemplary, and additional components may be present or some of the components may be omitted.

The plurality of power units 110a and 110b may include a positive power unit 110a and a negative power unit 110b, and may transmit power from the fast charger 20 to the electric vehicle 10 .

Specifically, the anode power unit (first power unit) 110a is a first conductor unit 112a, a first braid 114a surrounding the first conductor unit 112a, and an outer side of the first braid 114a. It may include a first insulation 116a formed to surround the.

The negative power unit (second power unit) 110b is configured to surround the second conductor unit 112b, the second braid 114b surrounding the second conductor unit 112b, and the outside of the second braid 114b. The formed second insulation 116b may be included. Since the first power unit 110a and the second power unit 110b have at least the same configuration, the first power unit 110a will be exemplified below for convenience.

The first conductor unit 112a of the first power unit 110a may be formed of a composite stranded wire formed by twisting a plurality of stranded wires. Each stranded wire may be formed by twisting a plurality of strands. Each element may be an annealed wire having low resistance, but is not limited thereto.

For example, each stranded wire may be formed by twisting 26 strands. Each element may be formed of at least one of copper, iron, and aluminum through which electricity can flow, and may preferably be an annealed wire.

Subsequently, the composite stranded wire may be formed of at least one of an aggregate strand formed by twisting a plurality of strands or a uni-lay stranded strand formed by twisting a plurality of strands in a uni-lay structure.

In various embodiments, the number of each stranded wire and each element included in the composite stranded wire is not limited to the above description, and the number of each stranded wire and each element wire may be variously configured.

The first braid 114a may be disposed between the first conductor unit 112a and the first insulation 116a to surround the outer surface of the first conductor unit 112a. Here, the first braid 114a may be formed by braiding a plurality of strands according to a preset braid tightness. The preset braid density may be, but is not limited to, a preset braid density for securing a space in which the cooling fluid can easily flow between the first conductor unit 112a and the first insulation 116a. A detailed description of the first braid 114a will be described below with reference to FIGS. 4 to 6 .

A space through which the cooling fluid may flow may be formed between the first conductor unit 112a and the first insulation 116a by the first braid 114a formed as described above. This space may function as a fluid passage through which the cooling fluid may flow. The cooling fluid may flow in the direction of the electric vehicle 10 from the rapid charger 20 through the space formed.

The first insulation 116a may be positioned outside the first power unit 110a and may be formed to surround the first braid 114a to insulate the first power unit 110a. In addition, the first insulation 116a may be made of at least one of polyethylene, polyurethane, fluororesin, polypropylene, rubber, polyvinyl chloride, thermoplastic elastomer, and thermoplastic polyurethane.

The grounding unit 120 may include a plurality of grounding conductors 122 and an insulating layer 124 formed to surround the plurality of grounding conductors 122 . For example, the grounding unit 120 may include seven grounding conductors 122 . In addition, the insulating layer 124 may be made of a material such as rubber or plastic.

The plurality of signal units 130a and 130b may include a first signal unit 130a and a second signal unit 130b capable of exchanging data for rapid charging with the rapid charger 20 . Hereinafter, the first signal unit 130a will be described for convenience.

The first signal unit 130a may include a signal line 130a-1 and an insulator 130a-2 surrounding the signal line 130a-1. In the present disclosure, it has been described that the cable includes two signal units, but the present disclosure is not limited thereto.

Specifically, the signal line 130a-1 may transmit a signal for rapid charging, and may be formed of a material such as a copper wire or an optical fiber.

The insulator 130a-2 is configured to insulate the signal line 130a-1, and is non-conductive polyethylene, polyurethane, polypropylene, fluororesin, rubber, polyvinyl chloride (PVC), thermoplastic elastomer (thermoplastic). It may be made of a material such as elastomer, TPE), or thermoplastic poly urethane (TPU).

The recovery unit 140 is configured to recover the cooling fluid in the direction of the rapid charger 20 . The recovery unit 140 may circumscribe the pair of power units 110a and 110b and may be disposed on the opposite side to the ground unit 120 . The cooling fluid flowing through the fluid passage may be supplied from the rapid charger 20 in the direction of the electric vehicle 10 and may be recovered again in the direction of the rapid charger 20 through the recovery unit 140 . For example, the recovery unit 140 may be made of a material such as nylon, polyethylene, polyurethane, polypropylene, fluororesin, rubber, polyvinyl chloride, thermoplastic elastomer, or thermoplastic polyurethane.

The cable sheath 150 accommodates a plurality of power units 110a, 110b, a grounding unit 120, a plurality of signal units 130a, 130b, and a recovery unit 140 therein, and these It can be protected from exposure. For example, the cable sheath 150 may be formed of at least one of polyethylene, polyurethane, polypropylene, fluororesin, rubber, polyvinyl chloride, thermoplastic elastomer, and thermoplastic polyurethane.

Hereinafter, the braiding and the fluid passage formed by the braiding according to an embodiment of the present disclosure will be described in detail with reference to FIGS. 4 to 6 .

4 is a schematic cross-sectional view illustrating a power unit according to an embodiment of the present disclosure, FIG. 5 is a schematic perspective view illustrating a power unit according to an embodiment of the present disclosure, and FIG. 6 is an embodiment of the present disclosure A schematic side view showing a braid according to an example. In the presented embodiment, the first power unit 110a among the two power units described with reference to FIGS. 2 and 3 will be described as an example. In this case, the second power unit 110b may also be formed in the same manner as the first power unit 110a described below. In particular, in the presented embodiment FIG. 4 shows an exemplary cross-sectional view of a power unit in which a cooling fluid F is flowing through a fluid passageway TH.

4 to 6 , the first power unit 110a includes a first conductor unit 112a and a first braid 114a formed to surround an outer surface u of the first conductor unit 112a. do. For example, the first conductor unit 112a may be a composite stranded wire formed by twisting seven stranded wires in the longitudinal direction of the first conductor unit 112a, but is not limited thereto, and the number of stranded wires forming the composite stranded wire may vary. can

The first braid 114a includes a plurality of stranded wires 118a, and each stranded wire 118a may be formed by twisting two or more strands 118a-1 in the longitudinal direction of the stranded wires 118a-1. For example, each stranded wire 118a may be formed by twisting 19 strands in the longitudinal direction of the stranded wire 118a-1, but is not limited thereto. The stranded wire 118a illustrated in FIG. 4 is only an exemplary diagram, and the present invention is not limited thereto, and the structure of the strands forming the stranded wire 118a may be variously formed as described below.

The stranded wire 118a formed in this way is braided in a net shape to form the first braid 114a having a two-layer structure, but the present invention is not limited thereto. A first braid 114a of may be formed. For example, the first braid 114a may be formed by braiding 16 strands 118a described above, but is not limited thereto.

The stranded wire 118a constituting the first braid 114a is an aggregate stranded wire formed by twisting a plurality of annealed wires, a uni-lay stranded wire formed by twisting a plurality of annealed wires in a uni-lay structure, and copper to an aluminum wire. CCA twisted wire formed by twisting a plurality of copper clad aluminum (CCA) wires that are insulated and light in weight It may be formed of at least one of CCA uni-lay stranded wires. Specifically, the aggregated stranded wire may use an aggregated wire formed by twisting a plurality of strands in one direction. Uni-Ray stranded strands may include Uni-Ray 7 stranded strands and Uni-Ray 19 stranded strands. The uni-ray 7-stranded wire may have a single-layer structure in which 6 strands of strands surround one strand as a center. The uni-ray 19 stranded wire is a uni-lay wire, and may have a two-layer structure in which one layer surrounds 6 strands with a center of one strand and 12 strands surround the first layer. In addition, the CCA uni-lay twisted pair may include a CCA uni-lay 7 twisted pair and a CCA uni-lay 19 twisted pair. CCA uni-lay 7 stranded wire can have a one-layer structure in which 6 CCA wires surround one CCA wire as the center, and CCA uni-lay 19 strands surround 6 core wires around one core. It may have a two-layer structure in which one layer and 12 CCA wires surround the first layer. The braid formed of uni-lay stranded wire has excellent resilience during repeated bending of the charging cable, and the braid formed of CCA stranded wire or CCA uni-lay stranded wire can reduce weight.

In various embodiments, the first braid 114a may include a plurality of braided yarns, and each braided yarn may be formed by braiding in a net shape. Specifically, each braided yarn may be formed by arranging a plurality of strands in a line, and the first braiding 114a may be formed by braiding a plurality of braided yarns. Here, the number of strands constituting the braided yarn may vary.

In various embodiments, the first braid 114a may be formed by overlapping the braid formed as described above in a plurality of layers. For example, a first braid 114a having a structure of four or more layers is formed by overlapping a plurality of braids of a two-layer structure formed of at least one of aggregate stranded wire, uni-lay stranded wire, CCA stranded wire, CCA aggregated stranded wire, or CCA un-rayed stranded wire. may be

Meanwhile, the first braid 114a may have a predetermined braiding density to secure a space through which the cooling fluid can easily flow.

As shown in FIG. 4, the cooling fluid F flowing through the space formed in this way, that is, the fluid passage TH, includes the first braid 114a, the outer surface of the first conductor unit 112a, and the first insulation 116a. ) can flow so as to contact at least a part of the inner surface of the .

In this way, a fluid passage TH through which a cooling fluid can flow is formed between the first conductor unit 112a and the first insulating unit 116a by the first braid 114a, so that the cooling fluid F is fluid. The cooling effect can be maximized by directly cooling the outer surface of the conductor that is in direct contact with the outer surface of the first conductor unit 112a through the passage TH and generates heat. For this reason, it is possible to prevent thermal damage to the charging cable and prevent a user's safety accident. In addition, since a separate pipe for flowing the cooling fluid is not included in the charging cable, the outer diameter of the charging cable may be minimized, and thus user convenience may be improved.

Furthermore, the first braid 114a made of the above-described conductor is formed to directly surround the first conductor unit 112a, so that the cross-sectional area of the first conductor unit 112a is increased, so that the electric loss is reduced and the performance of the charging cable This can be improved.

Hereinafter, a charging cable according to another embodiment of the present disclosure will be described in more detail with reference to FIGS. 7 and 8 .

7 is a schematic cross-sectional view of a charging cable according to another embodiment of the present disclosure, and FIG. 8 is a schematic perspective view of a charging cable according to an embodiment of the present disclosure.

7 and 8, the charging cable 100 includes a plurality of power units 710a and 710b, a grounding unit 120, a plurality of signal units 130a and 130b, a recovery unit 140 and a cable sheath ( 150) may be included. The components shown in FIGS. 7 and 8 are exemplary, and additional components may be present or some of the components may be omitted.

In the presented embodiment, among the configurations of FIGS. 7 and 8, configurations corresponding to the same names and/or same reference numerals as those described above in FIGS. 2 and 3 are at least the same as those described above in FIGS. 2 and 3, Detailed descriptions thereof will be omitted.

In another embodiment of the present disclosure, the power units 710a and 710b include a first power unit 710a and a second power unit 710b, and the first power unit 710a includes a first conductor unit 712a, It may include a first braid 714a surrounding the first conductor unit 712a and a first insulation 716a formed to surround an outer side of the first braid 714a. In addition, the second power unit 720a includes a second conductor unit 712b, a second braid 714a surrounding the second conductor unit 712b, and a second braid 714b formed to surround the outside of the second braid 714b. Insulation 716b may be included. Since the first power unit 710a and the second power unit 710b are configured to be at least the same, the first power unit 710a will be described below as an example for convenience.

The first conductor unit 712a of the first power unit 710a may be formed of a composite stranded wire in which a plurality of stranded wires are arranged in a regular arrangement, and the regularly arranged stranded wires are twisted. For example, the first conductor unit 712a may be formed of an interlocking stranded wire having a uni-lay structure. For example, each stranded wire may be formed by twisting 19 strands arranged in a uni-lay structure.

Subsequently, the composite stranded wire may be formed by twisting a greater number of stranded wires than the composite stranded wire described above in FIGS. 2 and 3 . For example, the composite stranded wire may be formed by twisting 19 strands arranged in a uni-lay structure. Such a composite stranded wire may have a two-layer structure in which 6 strands surround the first layer and 12 strands surround the first layer around one stranded wire.

The first braid 714a has the same structure as the above-described first braid 114a, is formed by braiding a plurality of wires according to a preset braiding density, and includes the first conductor unit 712a and the first insulation 716a. It may be disposed therebetween to surround the outer surface of the first conductor unit 712a. Here, the preset braid density may be a preset braid density so that the cooling fluid can easily flow between the first conductor unit 712a and the first insulation 716a.

A space through which a cooling fluid can flow, that is, a fluid passage TH, may be formed between the first conductor unit 712a and the first insulation 716a by the first braid 714a formed as described above. A detailed description of the first braid 714a will be described below with reference to FIGS. 9 and 10 .

9 is a schematic cross-sectional view illustrating a power unit according to another embodiment of the present disclosure, and FIG. 10 is a schematic perspective view illustrating a power unit according to another embodiment of the present disclosure. In the presented embodiment, the first power unit 710a among the two power units described with reference to FIGS. 6 and 7 will be described as an example. In this case, the second power unit 710b may also be formed in the same manner as the first power unit 710a described below. Also, in the presented embodiment, FIG. 9 shows an exemplary view of the power unit in which the cooling fluid is flowing through the fluid passageway TH.

9 and 10 , the first power unit 710a includes a first conductor unit 712a and a first braid 714a formed to surround an outer surface u of the first conductor unit 712a. do. For example, the first conductor unit 712a may include a composite stranded wire formed by twisting 19 stranded wires in the longitudinal direction of the first conductor unit 712a, but is not limited thereto.

The first braid 714a includes a plurality of stranded wires 718a, and each stranded wire 718a may be formed by twisting two or more strands 718a-1 in the longitudinal direction of the stranded wires 718a-1. For example, each strand 718a may be formed by twisting 19 strands in the length direction of the strand 718a-1, but is not limited thereto. The stranded wire 718a shown in FIG. 9 is only an exemplary drawing, and the present invention is not limited thereto, and the structure of the strands forming the stranded wire 718a may be variously formed as described below.

The stranded wire 118a formed in this way may be braided in a net shape to form a first braid 714a having a two-layer structure or a four-layer structure. For example, the first braid 114a may be formed by braiding 16 strands 718a described above, but is not limited thereto.

The stranded wire 718a constituting the first braid 714a may be formed of at least one of an aggregate stranded wire, a uni-lay stranded wire, a CCA stranded wire, a CCA aggregated stranded wire, and a CCA un-rayed stranded wire. For example, the stranded wire 718a of the first braid 714a may be formed in the same manner as the stranded wire 118a of the first braid 114a.

In various embodiments, the first braid 714a may be formed of a stranded wire consisting of a combination of an annealed wire and a CCA wire. In this case, the first braid 714a has good elasticity and weight reduction is possible.

In various embodiments, the first braid 714a may include a plurality of braids, and each braid may be formed by braiding in a net shape. Specifically, each braided yarn may be formed by arranging a plurality of strands in a line, and the first braiding 714a may be formed by braiding a plurality of braided yarns. Here, the number of strands constituting the braided yarn may vary.

In various embodiments, the first braid 714a may be formed by overlapping the braid formed as described above in a plurality of layers. For example, a first braid 714a having a structure of four or more layers is formed by overlapping a plurality of braids of a two-layer structure formed of at least one of aggregate stranded wire, uni-lay stranded wire, CCA stranded wire, CCA aggregated stranded wire, or CCA un-rayed stranded wire. may be

Meanwhile, the first braid 714a may have a predetermined braiding density to secure a space through which the cooling fluid can easily flow.

As shown in FIG. 9 , the cooling fluid F flowing through the fluid passage TH formed in this way is the first braid 714a, the outer surface of the first conductor unit 712a, and the inside of the first insulation 716a. It can flow to at least partially contact the surfaces.

As such, by the fluid passage TH formed by the first braid 714a, the cooling fluid is in direct contact with the outer surface of the first conductor unit 712a to directly cool the heat-generating outer surface of the conductor, so that the cooling effect is improved. can be maximized. For this reason, it is possible to prevent thermal damage to the charging cable and prevent a user's safety accident. In addition, since a separate pipe for flowing the cooling fluid is not included in the charging cable, the outer diameter of the charging cable may be minimized, and thus user convenience may be improved.

Furthermore, the cross-sectional area of the first conductor unit 712a is increased by the first braid 714a made of the above-described conductor, so that the conductor resistance is reduced, so that the electric loss can be reduced and the performance of the charging cable can be improved.

Hereinafter, a charging cable including a separate fluid passage for flowing a cooling fluid according to another embodiment of the present disclosure will be described in more detail with reference to FIGS. 11 and 12 .

11 is a schematic cross-sectional view of a charging cable according to another embodiment of the present disclosure, and FIG. 12 is a schematic perspective view of a charging cable according to another embodiment of the present disclosure.

11 and 12 , the charging cable 100 includes a plurality of power units 1110a and 710b, a grounding unit 120, a plurality of signal units 130a and 130b, a recovery unit 140 and a cable sheath ( 150) may be included. The components shown in FIGS. 6 and 7 are exemplary, and additional components may be present or some of the components may be omitted.

In the presented embodiment, among the configurations of FIGS. 10 and 11, configurations corresponding to the same names and/or same reference numerals as those described above in FIGS. 2 and 3 are at least the same as those described above in FIGS. 2 and 3, Detailed descriptions thereof will be omitted.

In another embodiment of the present disclosure, the power units 1110a and 1010b may include a first power unit 1110a and a second power unit 1110b. The first power unit 1110a is formed to surround the first conductor unit 1112a and the first conductor unit 1112a, and the first piping unit 1114 and the first piping unit 1114 through which a cooling fluid can flow. ) may include a first braid 1116a formed to surround the outer surface and a first insulation 1118a formed to surround the outer side of the first braid 1116a. In addition, the second power unit 1110b is formed to pass through the center of the second conductor unit 1112b and the second conductor unit 1112b, and a second piping unit 1120 through which a cooling fluid can flow, the second A second braid 1122 disposed between the conductor unit 1112b and the second piping unit 1120, a third braid 1116a and a third braid 1116a formed to surround the outside of the second conductor unit 1112b ) may include a second insulation 1118b formed to surround the outside.

First, the first conductor unit 1112a of the first power unit 1110a may be formed of a composite stranded wire formed by twisting a plurality of stranded wires. For example, each stranded wire may be formed by twisting 26 strands.

Subsequently, the composite stranded wire is formed by twisting, for example, seven stranded wires, and may have a single-layer structure surrounding six stranded wires around one stranded wire.

The first pipe unit 1114 may include a plurality of pipes, and the plurality of pipes may be disposed to surround at least a part of the outer surface of the first conductor unit 1112a in contact with each other. A cylindrical space in which the first conductor unit 1112a can be disposed may be formed inside the first piping unit 1114 formed as described above. Each pipe may have, for example, a trapezoidal cross-section, but is not limited thereto. The cooling fluid may flow in the direction of the electric vehicle 10 from the rapid charger 20 through the first piping unit 1114 formed in this way, and is recovered in the direction of the rapid charger 20 through the recovery unit 140 . can be Furthermore, the first piping unit 1114 may be formed of a conductive material including at least one of copper, iron, or aluminum.

The first braid 1116a may be disposed between the first pipe unit 1114 and the first insulation 1118a to surround the outer surface of the first pipe unit 1114 . Here, the first braid 1116a may be formed by braiding a plurality of strands according to a preset braiding density. The first pipe unit 1114 and the first braid 1116a will be described in more detail with reference to FIGS. 13 to 15 below.

The first insulation 1118a may be positioned outside the first power unit 1110a and may be formed to surround the first braid 1116a to insulate the first power unit 1110a.

Next, the second conductor unit 1112b of the second power unit 1110b is composed of a composite stranded wire formed by twisting a plurality of stranded wires. A space into which the second piping unit 1120 can be inserted may be formed. Accordingly, each stranded wire may be arranged to surround the outer surface of the second piping unit 1120 with the second piping unit 1120 as a center.

In addition, the structure of each strand of the second conductor unit 1112b may be the same as the structure of each strand of the first conductor unit 1112a described above. In other words, the number of strands forming each strand of the first conductor unit 1112a and the second conductor unit 1112b, the diameter of the strand, the number of strands, outer diameter, and pitch, etc. may be the same.

The second pipe unit 1120 is disposed inside the second conductor unit 1112b and may include a plurality of pipes. Here, the plurality of pipes included in the second pipe unit 1120 may be formed in a smaller number than the plurality of pipes constituting the first pipe unit 1114 . For example, the second pipe unit 1120 may include three pipes. Each pipe may have, for example, a sector-shaped cross-section, but is not limited thereto. The cooling fluid may flow in the direction of the electric vehicle 10 from the rapid charger 20 through the second piping unit 1120 formed in this way, and may be recovered in the direction of the rapid charger 20 through the recovery unit 140 . can Furthermore, the second piping unit 1140 may be made of a conductive material or a non-conductive material having good processability and light weight, such as plastic, but is not limited thereto.

The second braid 1122 may be disposed between the second piping unit 1120 and the second conductor unit 1112b to surround the outer surface of the second piping unit 1120 . Accordingly, the second braid 1122 may at least partially contact the inner surface of the second conductor unit 1112b. Further, the second braid 1122 may have a preset braid density.

The third braid 1116b may be disposed between the second conductor unit 1112b and the second insulation 1118b to surround the outer surface of the second conductor unit 1112b. Here, the braided density of the third braid 1116b may be identical to that of the first braid 1116a, but is not limited thereto. The second pipe unit 1120 , the second braid 1122 , and the third braid 1116b will be described in more detail below with reference to FIGS. 16 and 17 .

Hereinafter, a piping unit and braid according to another embodiment of the present disclosure will be described in more detail with reference to FIGS. 13 to 17 . Specifically, hereinafter, the first piping unit 1114 and the first braid 1116a will be described with reference to FIGS. 13 to 15 , and the second piping unit 1120 , the second braid 1122 and the third braid will be described. (1116b) will be described with reference to FIGS. 16 and 17 .

13 is a schematic cross-sectional view illustrating a first power unit according to another embodiment of the present disclosure, FIG. 14 is a schematic perspective view illustrating a first power unit according to another embodiment of the present disclosure, and FIG. 15 is a schematic side view illustrating a first braid according to another embodiment of the present disclosure.

13 to 15 , the first power unit 1110a includes a first conductor unit 1112a and a first piping unit 1114 formed to surround an outer surface u of the first conductor unit 1112a. , a first braid 1116a formed to surround the first piping unit 1114 is included. For example, the first conductor unit 1112a may be a composite stranded wire formed by twisting seven stranded wires in the longitudinal direction of the first conductor unit 1112a, but is not limited thereto, and the number of stranded wires forming the composite stranded wire may vary. can

A plurality of pipes may be arranged in a circle so as to form a space for arranging the first power unit 1112a therein in the first pipe unit 1114 . Each pipe may have a shape such that a cooling fluid may flow, and the cross-section is such that the inner surface of the first pipe unit 1114 contacts the outer surface u of the first conductor unit 1112a at least partially. For example, the cross section of each pipe may have a trapezoidal shape, but is not limited thereto, and may have various shapes for minimizing the outer diameter of the charging cable by maximally contacting the outer surface u of the first conductor unit 1112a. can

In various embodiments, each pipe may have an outer diameter of a preset size so that the inner surface of the first pipe unit 1114 is in contact with the outer surface u of the first conductor unit 1112a as much as possible. For example, the preset size may be smaller than the size of the outer diameter of each pipe forming the second pipe unit 1120 .

The first piping unit 1114 may be made of a conductive material to further increase the cross-sectional area of the first conductor unit 1112a. For example, the conductive material may include at least one of copper, iron, and aluminum as described above, but is not limited thereto.

In various embodiments, the first piping unit 1114 may be made of a non-conductive material such as plastic. In this case, another braid (not shown) made of a conductor may be additionally disposed in the first power unit 1110a between the first piping unit 1114 and the first conductor unit 1112a. The cross-sectional area of the first conductor unit 1112a may be further increased by the additionally disposed braiding.

The first braid 1116a may include a plurality of braided yarns 1124 , and each braided yarn 1124 may be formed by braiding in a net shape. For example, each of the braids 1124 may include 10 strands arranged in a line, and the first braid 1116a may be formed by braiding 16 braids, but is not limited thereto. In addition, each element wire may be, for example, an annealed wire, a CCA wire, or a combination of an annealed wire and a CCA wire, but is not limited thereto, and elements of various materials other than the annealed wire may be used.

The first braid 1116a may have a predetermined braiding density to ensure smoothness of the conductor and increase the cross-sectional area of the conductor. Through this, the smoothness of the conductor may be secured by about 85% or more.

By reducing the heat generation of the conductor unit by the first piping unit 1114 formed in this way, it is possible to prevent thermal damage to the charging cable and prevent a user's safety accident. In addition, since the cross-sectional area of the first conductor unit 1112a is further increased by the first piping unit 1114 and the first braid 1116a, the electric loss can be reduced and the performance of the charging cable can be improved.

16 is a schematic cross-sectional view illustrating a second power unit according to another embodiment of the present disclosure, and FIG. 17 is a schematic perspective view illustrating a second power unit according to another embodiment of the present disclosure.

16 and 17 , the second power unit 1110b includes a second conductor unit 1112a, a second piping unit 1120 formed inside the second conductor unit 1112a, and a second conductor unit ( A second braid 1122 formed between 1112a and the second piping unit 1120 and a third braid 1116b formed to surround the second conductor unit 1112a may be included.

The second conductor unit 1112a may have a space therein for arranging the second piping unit 1120, and a plurality of stranded wires may be arranged in a circle and twisted in the longitudinal direction of the second conductor unit 1112a. . For example, the second conductor unit 1112a may include, but is not limited to, a composite stranded wire in which six stranded wires are arranged in a circle and twisted in the longitudinal direction of the second conductor unit 1112a, but is not limited thereto. The number of may vary.

The second pipe unit 1120 may include a plurality of pipes, and the plurality of pipes may be coupled to form a cylindrical shape. For example, each pipe may have a sector-shaped cross-section to form a cylindrical shape when combined, but is not limited thereto, and may have a cross-section of various shapes capable of forming a cylindrical shape when a plurality of pipes are coupled.

Also, the second pipe unit 1120 may have an outer diameter that can be inserted into the second conductor unit 1112a. For example, the size of the outer diameter of the second piping unit 1120 may at least match the size of the outer diameter of each strand forming the second power unit 1110b, but is not limited thereto.

The second braid 1122 includes a plurality of braided yarns 1126 , and each braided yarn 1126 may be formed by braiding in a net shape. Specifically, each braided yarn 1126 may include a plurality of strands arranged in a line, and the second braid 1122 may be formed by braiding a plurality of braided yarns 1126 . For example, each braided yarn 1126 may be formed by arranging five strands in a line, and the second braiding 1122 may be formed by braiding 16 braided yarns, but is not limited thereto. Since the second piping unit 1120 surrounded by the second braid 1122 has a smaller outer diameter compared to the first piping unit 1114 surrounded by the first braid 1116a, the second braid 1122 is the first braid. It may be formed of a smaller number of braids compared to (1116a), but is not limited thereto. Each element may be, for example, an annealed wire, a CCA wire, or a combination of an annealed wire and a CCA wire, but is not limited thereto, and elements of various materials other than the annealed wire may be used.

The second braid 1122 is formed to surround the outer surface u1 of the second piping unit 1120 , and the outer surface of the second braid 1122 is at least partially in contact with the inner surface of the second conductor unit 1112a . Therefore, it can be made with a preset braid density in order to increase the cross-sectional area of the conductor.

The third braid 1116b may be formed to at least coincide with the first braid 1116a described above with reference to FIGS. 13 to 15 . Specifically, the third braid 1116b may also be formed by braiding a plurality of braided yarns 1128 in a net shape. For example, each of the braids 1128 may include 10 strands arranged in a line, and the third braid 1116b may be formed by braiding 16 braids, but is not limited thereto.

The third braid 1116b may be formed to surround the outer surface u2 of the second conductor unit 1112b, and may have a predetermined braiding density to ensure smoothness of the conductor and increase the cross-sectional area of the conductor. Through this, the smoothness of the conductor may be secured by about 85% or more.

By reducing the heat generation of the conductor unit by the second piping unit 1120 formed in this way, it is possible to prevent thermal damage to the charging cable and prevent a user's safety accident. In addition, as the cross-sectional area of the second conductor unit 1112b is further increased by the second piping unit 1120, the second braid 1122 and the third braid 1116b, the electric loss is reduced and the performance of the charging cable is improved. can be improved

In various embodiments, the charging cable 100 including the piping unit may have a structure as shown in FIGS. 18 and 19 . Hereinafter, a charging cable 100 including a piping unit according to various embodiments will be described with reference to FIGS. 18 and 19 .

18 and 19 are schematic perspective views of a charging cable according to various embodiments. In the presented embodiment, the components of the cable 100 shown in FIGS. 18 and 19 are at least the same as the components described with reference to FIGS. 11 to 17 , and thus a separate description thereof will be omitted.

Referring first to FIG. 18 , the charging cable 100 may include a first power unit 1810a and a second power unit 1810b having the same structure as the first power unit 1110a described with reference to FIGS. 11 to 14 . can

Next, referring to FIG. 19 , the charging cable 100 includes a first power unit 1910a and a second power having the same structure as the second power unit 1110b described with reference to FIGS. 11, 12, 16 and 17 . unit 1910b.

In the charging cable formed as described above, electric loss may be reduced, and thus the performance of the charging cable may be improved.

A person of ordinary skill in the art of the present disclosure will recognize that the various illustrative logical blocks, modules, processors, means, circuits and algorithm steps described in connection with the embodiments disclosed herein include electronic hardware, (convenience For this purpose, it will be understood that it may be implemented by various forms of program or design code (referred to herein as "software") or a combination of both. To clearly illustrate this interchangeability of hardware and software, various illustrative components, blocks, modules, circuits, and steps have been described above generally in terms of their functionality. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the overall system. A person skilled in the art of the present disclosure may implement the described functionality in various ways for each specific application, but such implementation decisions should not be interpreted as a departure from the scope of the present disclosure.

The various embodiments presented herein may be implemented as methods, apparatus, or articles of manufacture using standard programming and/or engineering techniques. The term “article of manufacture” includes a computer program or media accessible from any computer-readable device. For example, computer-readable storage media include magnetic storage devices (eg, hard disks, floppy disks, magnetic strips, etc.), optical disks (eg, CDs, DVDs, etc.), smart cards, and flash drives. memory devices (eg, EEPROMs, cards, sticks, key drives, etc.). The term “machine-readable medium” includes, but is not limited to, wireless channels and various other media capable of storing, retaining, and/or carrying instruction(s) and/or data.

The description of the presented embodiments is provided to enable any person skilled in the art to make or use the present disclosure. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the scope of the present disclosure. Thus, the present disclosure is not intended to be limited to the embodiments presented herein, but is to be construed in the widest scope consistent with the principles and novel features presented herein.

The scope of the rights to the method in the claims of the present disclosure is generated by the functions and features described in each step, and unless the precedence of the order is specified in each step constituting the method, the claims It is not affected by the order of description of each step in For example, in a claim described as a method comprising steps A and B, even if step A is stated before step B, the scope of the rights is not limited that step A must precede step B.

Claims (6)

As a fast charging cable for a large-capacity charger for electric vehicles,
a plurality of power units for supplying power to the electric vehicle; and
and a cable sheath formed to surround the outside of the plurality of power units,
Each of the plurality of power units,
conductor unit;
a braid formed to surround the conductor unit; and
Insulation formed on the braid; Including,
wherein the braid forms a passageway for a cooling fluid to flow between the conductor unit and the insulation;
fast charging cable. According to claim 1, wherein the braid,
including a plurality of stranded wires,
The plurality of strands are braided to form a net,
The plurality of stranded wires are formed by twisting in the longitudinal direction of the plurality of stranded wires,
fast charging cable. According to claim 1, wherein the braid,
consisting of a predetermined braid density to secure a space for the cooling fluid to flow,
fast charging cable. According to claim 1, wherein the braid,
An aggregate stranded wire formed by twisting a plurality of strands, a uni-lay stranded wire formed by twisting a plurality of strands in a uni-lay structure, a CCA stranded wire formed by twisting a plurality of copper clad aluminum (CCA) wires, It is formed by at least one of a CCA aggregate strand formed by twisting a plurality of CCA wires or a CCA uni-ray stranded wire formed by twisting a CCA wire arranged in a uni-lay structure.
fast charging cable. According to claim 1, wherein the conductor unit,
Consists of a composite stranded wire including a plurality of stranded wires,
The composite stranded wire consists of at least one of an aggregate stranded wire formed by twisting a plurality of strands, or a uni-lay stranded wire formed by twisting a plurality of strands in a uni-lay structure,
fast charging cable. According to claim 1, Inside the cable sheath,
a signal unit configured to perform signal exchange or communication with the electric vehicle;
grounding unit for grounding; and
a recovery unit for recovering the cooling fluid;
further comprising,
fast charging cable.

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