Charging cable

Abstract

This embodiment includes: an outer tube; and at least one charging wire, which is arranged inside the outer tube, and an outer flow path for cooling fluid to pass through is formed between the outer tube and the at least one charging wire. The charging wire includes: at least one charging conductor; and an insulator, which surrounds the outer circumference of the at least one charging conductor, and an inner flow path for cooling fluid to pass through is formed in the insulator.

Description

Technical Field

[0001] The invention relates to a charging cable used for charging electric vehicles and the like. Background Art

[0002] The development of electric vehicles has increased the demand for charging devices for transmitting electrical energy.

[0003] The higher the current in any conductor, the more heat is generated. As a result, the conductors between the charger and the vehicle are being sized larger to accommodate higher surge currents.

[0004] An example of a charging system capable of charging an electric vehicle is a charging system for an electric vehicle disclosed in Korean Patent Gazette 10-1952159B1 (published on February 26, 2019), which may include: a power supply device; a cable having a first end and a second end, the first end being attached to the power supply device and having an electrical conductor and a cooling pipe extending from the first end to the second end, respectively; and a connector attached to the second end of the cable and having a form factor corresponding to the charging port of the electric vehicle, and the cooling pipe may be in contact with the electrical conductor. Summary of the invention

[0005] Problems to be solved by the invention

[0006] An object of the present embodiment is to provide a charging cable that can cool a charging cable more quickly by maximizing the heat transfer area between a cooling fluid and the charging cable.

[0007] It is an object of the present embodiment to provide a charging cable whose diameter can be minimized by passing a cooling fluid through the charging line.

[0008] Technical solutions to the problem

[0009] The charging cable of this embodiment may include: an outer tube; and at least one charging wire disposed inside the outer tube, and an outer flow path for cooling fluid to pass through is formed between the outer tube and the at least one charging wire.

[0010] The charging cable may include: at least one charging cable; and an insulator surrounding an outer circumference of the at least one charging cable, wherein an inner flow path through which a cooling fluid passes is formed in the insulator.

[0011] The inner flow path may be formed inside the insulator.

[0012] The insulator may include an inner periphery forming the inner flow path and an outer periphery spaced apart from the inner periphery of the outer tube.

[0013] A plurality of insulating portions surrounding the charging wire may be formed in the insulator, and adjacent insulating portions may be connected by a bridge portion.

[0014] A cooling fluid recovery hole through which the cooling fluid passes may be formed in the bridge portion.

[0015] The cooling fluid recovery hole may be formed to extend along the length direction of the insulator.

[0016] The charging cable may further include: a cooling fluid supply portion that supplies the cooling fluid to the inner flow path; and a cooling fluid recovery portion that guides the cooling fluid that has passed through the outer flow path.

[0017] The cross-sectional area of ​​the inner flow path may be smaller than the cross-sectional area of ​​the outer flow path.

[0018] In the insulator, peaks and valleys may be alternately formed in the circumferential direction.

[0019] The insulator may include concavo-convex portions.

[0020] The insulator may include a porous member.

[0021] A flow guide for guiding the flow of the cooling fluid may protrude from the insulator.

[0022] The flow guide may be in the shape of a spiral.

[0023] The charging cable may further include a communication line disposed inside the outer tube.

[0024] The outer flow path may be formed between an outer periphery of the charging line and an outer periphery of the communication line and an inner periphery of the outer tube.

[0025] The charging cable may include a support member disposed inside the outer tube, the support member including: a charging line through hole for the charging line to pass through; and a communication line through hole for the communication line to pass through.

[0026] The support may support the charging wire and the communication wire such that an outer circumference of the charging wire and an outer circumference of the communication wire are spaced apart from an inner circumference of the outer tube.

[0027] Effects of the Invention

[0028] According to the present embodiment, the cooling fluid can cool the charging wire through the inner flow path inside the insulator and the outer flow path outside the insulator in sequence, thereby maximizing the insulation area and cooling the charging wire more quickly and efficiently.

[0029] In addition, the outer tube and the insulator can constitute a double tube, and the length of the cooling flow path is increased, so that the heat generated by the charging wire can be effectively cooled.

[0030] In addition, the insulating area can be increased by using the concavo-convex portion of the insulator or the porous member or the flow guide, so that the charging wire can be cooled more effectively. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 is a side view showing an example of a charging cable of the present embodiment,

[0032] Figure 2 is a partially cutaway perspective view of an example of a charging cable of this embodiment,

[0033] Figure 3 is a cross-sectional view showing a portion of an example of a charging cable of the present embodiment,

[0034] Figure 4 is along Figure 3 The cross-sectional view taken along the AA′ line of

[0035] Figure 5 is a partially cutaway perspective view showing an example of a charging cable of the present embodiment,

[0036] Figure 6 is a partially cutaway perspective view of a comparative example compared with an example of a charging cable of the present embodiment,

[0037] Figure 7 is a three-dimensional diagram of the support member of this embodiment,

[0038] Figure 8 is a cross-sectional view showing an example in which the support member of the present embodiment is disposed inside the outer tube,

[0039] Fig. 9 2 is a perspective view showing an example in which the support member of the present embodiment is arranged inside the outer tube.

[0040] Fig.10 1 is a diagram showing a first modified example of the insulator of this embodiment.

[0041] Fig.11 2 is a diagram showing a second modified example of the insulator of the present embodiment.

[0042] Fig.12 1 is a diagram showing a third modified example of the insulator of this embodiment,

[0043] Fig.13 It is a diagram showing a fourth modified example of the insulator of the present embodiment. DETAILED DESCRIPTION

[0044] The following, with the attached Figure 1 The specific embodiments of the present invention will be described in detail.

[0045] Figure 1 is a side view showing an example of a charging cable of the present embodiment, Figure 2 is a partially cutaway perspective view of an example of a charging cable of this embodiment, Figure 3is a cross-sectional view showing a portion of an example of a charging cable of the present embodiment, Figure 4 is along Figure 3 The cross-sectional view taken along the AA′ line of Figure 5 FIG. 1 is a partially cutaway perspective view showing an example of the charging cable according to the present embodiment.

[0046] The charging cable 1 may include an outer tube 2 and a charging line. The charging cable 1 may also include a communication line.

[0047] The outer tube 2 may form the outer appearance of the charging cable 1. A space may be formed inside the outer tube 2, and the charging line and the communication line are accommodated in the space.

[0048] The outer tube 2 may be an outer sheath, which may house charging wires and communication wires, and through which the cooling fluid C may pass.

[0049] A plurality of charging cables may be provided inside the outer tube 2. The following description will be based on the case where a pair of charging cables 3 and 4 are arranged inside the outer tube 1. The present embodiment is not limited to the case where a pair of charging cables 3 and 4 are accommodated inside the outer tube 2. Three or more charging cables may also be arranged, and the number of charging cables is not limited. The pair of charging cables 3 and 4 may be formed into the same structure. For the sake of convenience, they are collectively referred to as charging cables 3 for description.

[0050] The charging cable 3 may include at least one charging wire 31 and an insulator 32 .

[0051] A plurality of charging wires 31 may be provided in one charging cable 3. The plurality of charging wires 31 may be arranged to be separated from each other by the insulator 32 along a circular trajectory of the insulator 32. That is, the plurality of charging wires 31 may be separated along the circumferential direction of the insulator 32.

[0052] The insulator 32 may be an electrically insulating insulator, and the insulator 32 may be a charging sheath that may insulate at least one charging wire 31. The insulator 32 may be a material that can transfer heat of the charging wire 31 to the cooling fluid C (see Figure 4 )'s heat transfer component.

[0053] The insulator 32 may surround the outer periphery 31a of at least one charging wire 31 (see Figure 4 ). An inner flow path IF through which the cooling fluid C passes may be formed in the insulator 32. The inner flow path IF may be formed inside the insulator 32 and extend along the length direction of the insulator 32. The cross-sectional area of ​​the inner flow path IF may be smaller than the cross-sectional area of ​​the outer flow path OF described later.

[0054] The insulator 32 may be a charging skin having the inner flow path IF formed therein. The insulator 32 may be formed in a hollow shape, and the insulator 32 includes an outer periphery 32a and an inner periphery 32b.

[0055] The outer circumference 32 a of the insulator 32 may be spaced apart from the inner circumference of the outer tube 2 .

[0056] The inner periphery 32 b of the insulator 32 may form the inner flow path IF.

[0057] The inner flow path IF may be formed inside the inner periphery 32b of the insulator 32. The inner flow path IF may be formed inside the insulator 32 and extend along the length direction of the insulator 32.

[0058] Insulator 32, such as Figure 4 and Figure 5 As shown, an insulating portion 33 and a bridge portion 34 may be included.

[0059] The insulating portion 33 may surround the outer circumference 31 a of the charging wire 31 . The insulating portion 33 may have a ring-shaped cross section. The insulator 32 may include a plurality of insulating portions 33 .

[0060] A charging conductor 31 can be accommodated on the inner side of an insulation 33 .

[0061] The plurality of insulating parts 33 may be formed in a row along a circular track, the plurality of insulating parts 33 may be spaced apart from each other, and the plurality of insulating parts 33 may be spaced apart from each other along the circumferential direction of the insulator 32 .

[0062] The bridge portion 34 may connect a pair of adjacent insulating portions 33 among the plurality of insulating portions 33. The insulating portions 33 and the bridge portions 34 may be alternately formed along the circumferential direction of the insulator 32.

[0063] In the insulator 32, peaks and valleys may be formed alternately in the circumferential direction. In the outer periphery 32a of the insulator 32, peaks and valleys may be formed alternately in the circumferential direction. In the inner periphery 32b of the insulator 32, peaks and valleys may be formed alternately in the circumferential direction.

[0064] The bridge portion 34 may be provided with a cooling fluid recovery hole 35 (see Figure 5 and Figure 6 The cooling fluid recovery hole 55 may be formed by extending along the length direction of the insulator 32. The cooling fluid recovery hole 55 may be formed by a long slit in the length direction of the insulator 32.

[0065] The cooling fluid recovery hole 35 may be close to the opposite side of the cooling fluid supply part 8 and the cooling fluid recovery part 9. The cooling fluid supply part 8 and the cooling fluid recovery part 9 may be close to one of the one end and the other end of the inner flow path IF, and the cooling fluid recovery hole 35 is close to the other end of the one end and the other end of the inner flow path IF.

[0066] The insulator 32 may include a baffle 39 (see Figure 3). The cooling fluid C may be guided to the cooling fluid recovery hole 35 by the baffle 39 .

[0067] The charging cable 1 may be formed with an outer flow path OF through which the cooling fluid C passes.

[0068] The outer flow path OF may be formed between at least one of the charging wires 3 , 4 and the outer tube 2 . The outer flow path OF may be formed between the outer periphery 32 a of at least one of the charging wires 3 , 4 and the inner periphery of the outer tube 2 .

[0069] In the case where the charging cable 1 further includes a communication line 5, the outer flow path OF may be formed between the outer tube 2 and at least one of the charging lines 3, 4 and the communication line 5. The outer flow path OF may be formed between the outer periphery 32a of at least one of the charging lines 3, 4 and the outer periphery 52a of the communication line 5 and the inner periphery of the outer tube 2.

[0070] The outer flow path OF may be parallel to the inner flow path IF. The outer flow path OF may surround the outer circumference of the insulator 32. The outer flow path OF may be separated from the flow path IF via the insulator 32.

[0071] The cooling fluid C can absorb the heat transferred to the radially inner side of the insulator 32 while passing through the inner flow path IF.

[0072] The cooling fluid C may flow through the flow path IF and then through the cooling fluid recovery hole 55 to flow into the external flow path OF.

[0073] The cooling fluid C flowing into the outer flow path OF can absorb the heat transferred to the radially outer side of the insulator 32 while passing through the outer flow path OF.

[0074] That is, the cooling fluid C flowing through the charging cable 1 can absorb the heat of the charging wire 31 for the first time when passing through the inner side of the insulator 32, and absorb the heat of the charging wire 31 for the second time when passing through the outer side of the insulator 32 after passing through the cooling fluid recovery hole 35.

[0075] The communication line 5 may be disposed inside the outer tube 2 .

[0076] The communication line 5 may include a communication conductive wire 51 and a communication sheath 52 surrounding an outer circumference 51 a of the communication conductive wire 51 .

[0077] A plurality of communication conductors 51 may be arranged inside the communication sheath 52 .

[0078] The outer periphery 52a of the communication skin 52 may have a smooth surface.

[0079] A connection terminal 6 (see Figure 1). A charger capable of charging an electric vehicle may include a power source, and a connection terminal 6 formed at one end of the charging cable 1 may be connected to the power source provided in the charger.

[0080] A plurality of connection terminals 6 may be provided at one end of the charging cable 1. A pair of connection terminals 6 may be provided, any one of the pair of connection terminals 6 is connected to any one of the charging cables 3, and the other of the pair of connection terminals 6 is connected to the other charging cable 4.

[0081] The other end of the charging cable 1 may be provided with a connector 7 (see Figure 1 ). The connector 7 may be in a shape corresponding to a charging port of an electric vehicle, and include a charging terminal and a communication terminal connected to the electric vehicle.

[0082] The charging cable 1 may further include a cooling fluid supply portion 8 (see Figure 1 ) and cooling fluid recovery unit 9 (refer to Figure 1 ).

[0083] The cooling fluid supply unit 8 may supply the cooling fluid C to the inner flow path IF. A supply flow path communicating with the inner flow path IF may be formed in the cooling fluid supply unit 8. An example of the cooling fluid supply unit 8 may be a supply pipe having a supply flow path formed therein. The cooling fluid supply unit 8 may be connected to one side of the charging cable 3.

[0084] The cooling fluid recovery part 9 can guide the cooling fluid C through the outer flow path OF. The cooling fluid recovery part 9 can be formed with a recovery flow path connected to the outer flow path OF. An example of the cooling fluid recovery part 9 can be a recovery pipe having a recovery flow path formed inside. The cooling fluid recovery part 9 can be connected to one side of the outer tube 2.

[0085] Examples of the cooling fluid C may be water, antifreeze, or a cooling liquid such as glycerin, or may be a refrigerant that changes phase (liquefies or vaporizes) as the temperature changes.

[0086] When the cooling fluid C is a coolant, the cooler may include a radiator (heat dissipation unit) that can cool the coolant and a pump that can circulate the coolant to the charging cable 1 and the radiator. In this case, any one of the cooling fluid supply unit 8 and the cooling fluid recovery unit 9 may be connected to the radiator, and the cooling fluid supply unit 8 and the cooling fluid recovery unit 9 may be connected to the pump.

[0087] The coolant cooled by the radiator can be supplied to the inner flow path IF through the cooling fluid supply unit 8, and the coolant flowing out of the outer flow path OF can be recovered to the radiator through the cooling fluid recovery unit 9. The cooling fluid C can cool the charging cable 1 while circulating between the charging cable 1 and the radiator.

[0088] The cooler may also cool the cooling fluid C via an intermediate heat exchanger.

[0089] In a case where the cooler includes an intermediate heat exchanger that cools the cooling fluid C, the cooler may further include a pump that circulates the cooling fluid C to the intermediate heat exchanger and the charging cable 1 .

[0090] The cooler may include a refrigeration cycle device connected to and including the intermediate heat exchanger, the refrigeration cycle device including a compressor, a condenser, an expansion mechanism, and an intermediate heat exchanger (evaporator). Any one of the cooling fluid supply unit 8 and the cooling fluid recovery unit 9 may be connected to the intermediate heat exchanger, and the other of the cooling fluid supply unit 8 and the cooling fluid recovery unit 9 may be connected to a pump. In this case, an example of the cooling fluid C may be a coolant.

[0091] The intermediate heat exchanger can perform heat exchange between the refrigerant circulating in the compressor, condenser, expansion mechanism, and intermediate heat exchanger and the cooling fluid C circulating in the charging cable 1 and the intermediate heat exchanger, and is composed of, for example, a plate heat exchanger or a double tube heat exchanger.

[0092] The intermediate heat exchanger may be formed with a refrigerant flow path through which the refrigerant passes and a cooling fluid flow path through which the cooling fluid C passes. The intermediate heat exchanger may further include a heat transfer member that transfers heat between the refrigerant passing through the refrigerant flow path and the cooling fluid C passing through the cooling fluid flow path.

[0093] The cooling fluid C can be recovered to the intermediate heat exchanger through the inner flow path IF, the cooling fluid recovery hole 55, the outer flow path OF and the cooling fluid recovery part 9, and after being cooled by the intermediate heat exchanger, it is supplied to the inner flow path IF through the cooling fluid supply part 8.

[0094] In the case where the cooling fluid C is a refrigerant, an example of the cooler may include a refrigerant cooling type cooler. An example of the cooling fluid C may be R134a or the like.

[0095] The charging cable 1 may be a direct expansion heat exchanger or a direct expansion evaporator, and the cooler may include an expansion mechanism such as a compressor connected to the charging cable 1, a condenser connected to the compressor, and an expansion valve connected to the condenser and the charging cable. In this case, the cooling fluid supply unit 8 may be connected to the expansion mechanism to guide the refrigerant passing through the expansion mechanism to the inner flow path IF, and the cooling fluid recovery unit 9 may be connected to the compressor to guide the refrigerant passing through the outer flow path OF to the compressor.

[0096] When the cooling fluid C is a refrigerant, the density change of the refrigerant increases due to the heat transfer of the refrigerant, and the cross-sectional area of ​​the inner flow path IF is different from the cross-sectional area of ​​the outer flow path OF. Preferably, the cross-sectional area of ​​the inner flow path IF is smaller than that of the outer flow path OF.

[0097] When the cooling fluid C is a refrigerant, the refrigerant density before and after the heat exchange may differ by more than 5 times, and the cross-sectional area of ​​the outer flow path OF may be formed to be larger than the cross-sectional area of ​​the inner flow path IF, in which case the pressure loss of the refrigerant is minimized.

[0098] Figure 6 It is a partially cutaway perspective view of a comparative example for comparison with an example of the charging cable of the present embodiment.

[0099] The charging cable of the comparative example may include an outer tube 2, charging wires 3', 4' and a communication wire 5. The configuration of the outer tube 2 and the communication wire 5 may be the same as that of the charging cable of the present embodiment.

[0100] In the charging cables 3' and 4', a plurality of charging wires 31' are arranged inside the hollow insulator 32'. The plurality of charging wires 31' can fill the space formed inside the insulator 32'. No internal flow path for cooling fluid to pass through is formed inside the charging cables 3' and 4'.

[0101] In the charging cable of the comparative example, an outer flow path OF can be formed between the outer periphery of the charging lines 3′, 4′, the outer periphery of the communication line 5, and the inner periphery of the outer tube 2, and the cooling fluid flows into and passes through the outer flow path OF, and flows from the outer flow path OF to the outside.

[0102] In the comparative example, the flow of the cooling fluid and the heat transfer occur only through the outer flow path OF in the charging cable, and the heat transfer area of ​​the cooling fluid C may be smaller than that in the present embodiment.

[0103] The comparative example mainly cools the charging wires 31 ′ relatively close to the insulator 32 ′ among the plurality of charging wires 31 ′, which has the disadvantage that all the charging wires 31 ′ of the charging cables 3 ′ and 4 ′ cannot be cooled quickly.

[0104] On the other hand, in the charging cable 1 of the present embodiment, all the charging conductive wires 31 can be uniformly and quickly cooled by the inner flow path IF.

[0105] Figure 7 is a three-dimensional diagram of the support member of this embodiment, Figure 8 is a cross-sectional view showing an example in which the support member of the present embodiment is disposed inside the outer tube, Fig. 9 1 is a perspective view showing an example in which the support member of the present embodiment is provided inside the outer tube.

[0106] The charging cable may include a support 10 .

[0107] The support member 10 may be disposed inside the outer tube 2. The support member 10 may support a pair of charging cables 3, 4 and a communication cable 5 respectively.

[0108] The support 10 may support a pair of charging wires 3, 4 and the communication wire 5 so that the pair of charging wires 3, 4 and the communication wire 5 are separated from each other. The pair of charging wires 3, 4 and the communication wire 5 may be supported by the support 10 to be separated from the outer tube 2.

[0109] The support 10 may support the charging wires 3 , 4 and the communication wire 5 so that the outer peripheries of the charging wires 3 , 4 and the communication wire 5 are spaced apart from the inner periphery of the outer tube 2 .

[0110] The support member 10 may include charging line through holes 101 , 102 for the charging lines 3 , 4 to pass through, and a communication line through hole 104 for the communication line 5 to pass through.

[0111] In the charging cable through holes 101 and 102 , peaks and valleys may be alternately formed, like the charging cables 3 and 4 . The charging cables 3 and 4 may be supported by the peripheral portions of the charging cable through holes 101 and 102 .

[0112] The communication line through hole 104 , like the communication line 5 , may be circular, and the communication line 5 may be supported by the peripheral portion of the communication line through hole 104 .

[0113] The outer circumference 105 of the support member 10 may be circular, and the outer circumference 104 of the support member 10 contacts the inner circumference of the outer tube 2 .

[0114] A plurality of through holes 106 may be formed in the support member 10. The plurality of through holes 105 may be separated from the charging line through holes 101, 102 and the communication line through hole 104, respectively.

[0115] A plurality of through holes 106 may be formed between the charging line through holes 101, 102 and the outer periphery 105 of the support 10. A plurality of through holes 106 may be formed between the communication line through hole 104 and the outer periphery 106 of the support 10. A plurality of through holes 106 may be formed between the charging line through holes 101, 102 and the communication line through hole 104.

[0116] When the cooling fluid C passes through the interior of the outer tube 2 , the support member 10 can minimize the weight tilting toward one side, and the charging cable 1 can cool the charging wires 3 , 4 and the communication wire 5 as evenly as possible.

[0117] Fig.10 It is a diagram showing a first modified example of the insulator of the present embodiment.

[0118] Insulator 32, such as Fig.10 As shown, the peaks 32c and the valleys 32d may be alternately formed along the circumferential direction, and the peaks 32c and the valleys 32d are respectively curved.

[0119] The curved shapes of the peak portion 32 c and the valley portion 32 d may be formed on at least one side of the outer circumference and the inner circumference of the insulator 32 .

[0120] In the insulator 32 , since the peaks 32 c and the valleys 32 d are alternately formed in the circumferential direction, the insulation area from the cooling fluid C can be increased.

[0121] Fig.11 It is a diagram showing a second modified example of the insulator of the present embodiment.

[0122] Insulator 32, such as Fig.11 As shown, a concavo-convex portion 32 e may be included. The concavo-convex portion 32 e may be formed on at least one side of the inner periphery and the outer periphery of the insulator 32 .

[0123] The concavo-convex portion 32e may include a plurality of protrusions and grooves formed between the plurality of protrusions.

[0124] The insulator 32 can increase the insulation area from the cooling fluid C by means of the concavo-convex portion 32 e.

[0125] Fig.12 It is a diagram showing a third modified example of the insulator of the present embodiment.

[0126] Insulator 32, such as Fig.12 As shown, a porous member 32f may be included. The porous member 32f may be formed at a portion of the insulator 32.

[0127] The insulator 32 may increase the insulation area from the cooling fluid C by means of the porous member 32f.

[0128] Fig.13 It is a diagram showing a fourth modified example of the insulator of the present embodiment.

[0129] In the insulator 32 , a flow guide 36 that guides the flow of the cooling fluid C may be protruded. The flow guide 36 may be extended and formed on at least one side of the outer circumference and the inner circumference of the insulator 32 .

[0130] An example of the flow guide 36 may be in a spiral shape.

[0131] A plurality of flow guides 36 may be formed on the inner circumference or the outer circumference of the insulator 32 .

[0132] The plurality of flow guides 36 may be spaced apart in a circumferential direction R of the insulator 32 . The plurality of flow guides 36 may be spaced apart in a longitudinal direction L of the insulator 32 .

[0133] The insulator 32 may include a plurality of columns of flow guide groups 37 , 38 spaced apart along a length direction L of the insulator 32 .

[0134] Each of the plurality of rows of flow guides 37 , 38 may include a plurality of flow guides 36 spaced apart in the circumferential direction R. As shown in FIG.

[0135] The multi-row guide member groups 37 and 38 may be formed in more than two rows, or may be formed in more than three rows. However, for the convenience of the following description, an example of two rows is used for description, but it is not limited to two rows.

[0136] The plurality of rows of flow guide groups 37 , 38 may include an upstream flow guide group 37 in the flow direction of the cooling fluid C and a downstream flow guide group 38 located downstream of the upstream flow guide group 37 in the flow direction of the cooling fluid C.

[0137] The spiral directions of the flow guide members 36 of the upstream flow guide member group 37 and the flow guide members 36 of the downstream flow guide member group 38 may be the same or different.

[0138] The intervals between adjacent flow guide members 36 in the upstream flow guide group 37 may be the same as or different from the intervals between adjacent flow guide members 36 in the downstream flow guide group 38 .

[0139] Fig.13 (a) is a diagram showing an example of a plurality of flow guide member groups.

[0140] In one example of a plurality of guide member groups 37, 38, as shown in FIG. Fig.13 As shown in (a), the guide members 36 of the upstream guide member group 37 may be directed toward the guide members 36 of the downstream guide member group 38 in a spiral direction.

[0141] Fig.13 (b) is a diagram showing another example of a plurality of flow guide member groups.

[0142] In another example of a plurality of guide member groups 37, 38, as shown in FIG. Fig.13 As shown in (b), the flow guide members 36 of the upstream flow guide member group 37 may be directed toward between adjacent flow guide members 36 of the downstream flow guide member group 38 in the spiral direction.

[0143] Fig.13 (c) is a diagram showing still another example of a plurality of flow guide member groups.

[0144] In another example of the plurality of guide member groups 37, 38, as shown in FIG. Fig.13 As shown in (c), the spiral direction of the guide members of the upstream guide member group 37 may be different from the spiral direction of the guide members of the downstream guide member group 37. The spiral direction of the guide members 36 of the upstream guide member group 37 and the spiral direction of the guide members 36 of the downstream guide member group 37 may have a right angle or an obtuse angle.

[0145] The insulator 32 having the protruding guides 36 as described above can increase the insulation area with the cooling fluid C and cool the charging wire 31 more quickly and evenly.

[0146] The above description is only an exemplary description of the technical concept of the present invention. Ordinary technicians in the technical field to which the present invention belongs can make various modifications and variations without departing from the essential features of the present invention.

[0147] Therefore, the embodiments disclosed in the present invention are not intended to limit the technical concept of the present invention but to explain it, and the scope of the technical concept of the present invention is not limited by such embodiments.

[0148] The protection scope of the present invention should be interpreted by the claims, and should be interpreted that all technical ideas within the scope equivalent to the claims belong to the scope of the present invention.

Claims

1. A charging cable, wherein: include: External pipe; as well as at least one charging line, disposed inside the outer tube, An outer flow path for cooling fluid to pass through is formed between the outer tube and at least one of the charging cables, The charging cable comprises: at least one charging lead; and an insulator surrounding the outer circumference of at least one of the charging wires, An inner flow path for cooling fluid to pass through is formed in the insulator, The insulator comprises: an inner periphery, forming the inner flow path; and The outer periphery is separated from the inner periphery of the outer tube.

2. The charging cable according to claim 1, wherein: The inner flow path is formed inside the insulator.

3. The charging cable according to claim 1, wherein: Also includes: a cooling fluid supply portion configured to supply cooling fluid to the inner flow path; and A cooling fluid recovery portion is provided through which the cooling fluid passing through the external flow path is guided.

4. The charging cable according to claim 3, wherein: The cross-sectional area of ​​the inner flow path is smaller than the cross-sectional area of ​​the outer flow path.

5. The charging cable according to claim 1, wherein: The insulator includes peaks and valleys alternately formed in a circumferential direction.

6. The charging cable according to claim 1, wherein: The insulator includes a concavo-convex portion.

7. The charging cable according to claim 1, wherein: The insulator includes a porous member.

8. The charging cable according to claim 1, wherein: A flow guide protrudes from the insulator to guide the flow of the cooling fluid.

9. The charging cable according to claim 8, wherein: The flow guide is in a spiral shape.

10. A charging cable, wherein: include: External pipe; as well as at least one charging line, disposed inside the outer tube, An outer flow path for cooling fluid to pass through is formed between the outer tube and at least one of the charging cables, The charging cable comprises: at least one charging lead; as well as an insulator surrounding the outer circumference of at least one of the charging wires, An inner flow path for cooling fluid to pass through is formed in the insulator, The insulator includes a plurality of insulating parts surrounding the charging wire. Adjacent insulating portions are connected to the bridging portion.

11. The charging cable according to claim 10, wherein: The bridge portion includes a cooling fluid recovery hole for cooling fluid to pass through.

12. The charging cable according to claim 11, wherein: The cooling fluid recovery hole is formed to be long in the length direction of the insulator.

13. A charging cable, wherein: include: External pipe; as well as at least one charging line, disposed inside the outer tube, An outer flow path for cooling fluid to pass through is formed between the outer tube and at least one of the charging cables, The charging cable comprises: at least one charging lead; and an insulator surrounding the outer circumference of at least one of the charging wires, An inner flow path for cooling fluid to pass through is formed in the insulator, The charging cable further includes: a communication line disposed inside the outer tube, The inner flow path is formed inside the inner circumference of the insulator, The outer flow path is formed between an outer periphery of the charging line, an outer periphery of the communication line, and an inner periphery of the outer tube.

14. The charging cable according to claim 13, wherein: It also includes a support member arranged inside the outer tube, The support member comprises: A charging cable through hole, through which the charging cable passes; and A communication line through hole for the communication line to pass through, The support supports the charging wire and the communication wire such that outer circumferences of the charging wire and the communication wire are spaced apart from an inner circumference of the outer tube.

Images