Electric vehicle charging cable, cable assembly, and charging system including same

Abstract

The present invention relates to an electric vehicle charging cable, a cable assembly, and a charging system including same. Specifically, the present invention relates to an electric vehicle charging cable, a cable assembly, and a charging system including same, wherein heat that is generated from the electric vehicle charging cable when charging an electric vehicle can be efficiently cooled to prevent damage to internal components due to heat and prevent safety accidents such as fire and the like, while minimizing the diameter and maximizing the transmission capacity of the electric vehicle charging cable.

Description

Cables for electric vehicle charging, cable assemblies and charging systems including the same

[0001] The present invention relates to an electric vehicle charging cable, a cable assembly, and a charging system including the same. Specifically, the present invention relates to an electric vehicle charging cable, a cable assembly, and a charging system including the same, which efficiently cool the heat generated in the electric vehicle charging cable during electric vehicle charging, thereby preventing damage to internal components due to heat and safety accidents such as fire, while minimizing the diameter and maximizing the power transmission capacity.

[0002] With the proliferation of electric vehicles, the installation of electric vehicle chargers is expanding. Rapid chargers capable of rapid charging are becoming increasingly widespread, enabling rapid charging in a short period of time. Unlike slow charging, the output voltage of rapid chargers for rapid charging ranges from 50 V to 1,500 V DC and output currents from 100 A to 3,000 A. Charging an electric vehicle using these chargers typically takes between 20 and 50 minutes. The output current of these chargers is increasing, depending on the battery capacity and charging technology of the electric vehicle.

[0003] These rapid chargers connect one end of an electric vehicle charging cable to the charger body, attach a cable connector to the other end of the charging cable, and then attach the cable connector to an electric vehicle connector provided in the electric vehicle to supply electricity from the electric vehicle charger to the electric vehicle.

[0004] Because these rapid chargers have output currents exceeding 100A, heat generation in the electric vehicle charging cable conductors and cable connector terminals that transmit this current to the electric vehicle can be a problem. Minimizing this heat generation can be achieved by increasing the conductor diameter of the electric vehicle charging cable, but this approach is difficult to fully reduce heat generation and increases the weight of the cable.

[0005] Meanwhile, Korean Patent Registration No. 10-2460284 relates to a conventional electric vehicle charging cable, and FIG. 1 illustrates a cross-sectional view of an embodiment of the conventional electric vehicle charging cable.

[0006] As illustrated in FIG. 1, a conventional electric vehicle charging cable (100') includes: a plurality of power units (10a', 10b') including conductors (11a, 11b) and taping layers (12') each wrapping the conductors (11a', 11b') and an insulating layer (13a', 13b') wrapping the taping layers (12'); at least one grounding unit (20') including a grounding conductor (21') and an insulating layer (23') wrapping the grounding conductor (21'); at least one communication unit (30a', 30b') including a plurality of communication unit cores including conductors (31a', 31b') and insulating layers (33a', 33b') wrapping the conductors (31a', 31b') and a communication unit jacket (35a', 35b') wrapping the plurality of communication unit cores as a whole; A cable jacket (70') that entirely surrounds the plurality of power units (10a', 10b'), the grounding unit (20'), and the one or more communication units (30a', 30b') may be included, and a separate cooling pipe (80a, 80b, 80c) including a fluid pipe (83a, 83b, 83c) having a flow path (81a, 81b, 81c) formed inside the center of the conductor (11a', 11b') of the power unit (10a', 10b') and between the power units (10a', 10b') through which a coolant can flow may be arranged.

[0007] As illustrated in Fig. 1, in order to solve the problem of overheating of an electric vehicle charging cable, there is a conventional technology of inserting a cooling tube inside a power unit and circulating a cooling fluid inside a cable by using a circulation structure of a cooling fluid pump and a cable connector provided inside a charger body. However, since at least two cooling tubes are arranged inside the power unit to circulate the cooling fluid inside the electric vehicle charging cable, the diameter of the power unit increases, which increases the dead space, which is an unnecessary space between the power units, and increases the overall diameter and weight of the cable, and there is a problem that additional equipment is required for the circulation of the cooling fluid.

[0008] Accordingly, there is an urgent need for electric vehicle charging cables, cable assemblies, and charging systems including the same that can efficiently cool the heat generated in electric vehicle charging cables during electric vehicle charging, thereby preventing damage to internal components due to heat and safety accidents such as fire, while minimizing the diameter and increasing the power transmission capacity.

[0009] The present invention aims to provide an electric vehicle charging cable, a cable assembly, and a charging system including the same, which can prevent damage to internal components due to heat and safety accidents such as fire by efficiently cooling the heat generated in an electric vehicle charging cable when charging an electric vehicle, while minimizing the diameter and increasing the power transmission capacity.

[0010] To solve the above problem, the present invention,

[0011] A cable for charging an electric vehicle, which connects a main body of an electric vehicle charger and a cable connector for charging an electric vehicle, comprises: a plurality of power units including a conductor and an insulating layer covering the conductor; and a cable jacket covering the plurality of power units; wherein the plurality of power units include two or more power units having the same polarity, and an empty space is formed inside the cable jacket so as to secure a refrigerant path through which refrigerant injected into the inside of the cable jacket from the main body of the electric vehicle charger can flow.

[0012] Here, an electric vehicle charging cable is provided, characterized in that the total cross-sectional area of ​​the refrigerant passage is 10 to 50% of the total cross-sectional area of ​​the cable at any cross-section of the electric vehicle charging cable.

[0013] In addition, a cable for charging an electric vehicle is provided, characterized in that it further includes an injection tube into which a refrigerant is injected into the empty space between the cable jacket and the power unit among the empty spaces.

[0014] Furthermore, a cable for charging an electric vehicle is provided, characterized in that the empty space surrounded by the plurality of power units among the empty spaces further includes a recovery tube for recovering the refrigerant injected through the injection tube.

[0015] Here, a cable for charging an electric vehicle is provided, characterized in that the inner diameter of the recovery tube is larger than or equal to the inner diameter of the injection tube.

[0016] In addition, a cable for charging an electric vehicle is provided, characterized in that a thermally conductive material is filled in the empty space between the plurality of power units and the recovery tube.

[0017] Meanwhile, a cable for charging an electric vehicle is provided, characterized in that the cable jacket has a tube shape.

[0018] In addition, the electric vehicle charging cable is provided, characterized in that it includes a grounding unit including a grounding conductor and an insulating layer surrounding the grounding conductor.

[0019] In addition, the electric vehicle charging cable is characterized in that it further includes one or more communication units including a plurality of communication unit cores including a conductor and an insulating layer surrounding the conductor, and a communication unit jacket surrounding the plurality of communication unit cores as a whole.

[0020] Meanwhile, a cable assembly for charging an electric vehicle is provided, comprising a cable for charging an electric vehicle according to any one of claims 1 to 6, one end of which is connected to a main body of an electric vehicle charger, and a cable connector coupled to the other end of the cable for charging an electric vehicle, wherein the cable connector includes a plurality of connector terminals each connected to a conductor of the plurality of power units.

[0021] Here, an electric vehicle charging cable assembly is provided, which includes the electric vehicle charging cable, and one of the plurality of connector terminals is provided with a first connection portion to which the injection tube is connected, another of the plurality of connector terminals is provided with a second connection portion to which the recovery tube is connected, and each of the connector terminals is provided with a third connection portion to which a connecting tube is connected to connect them to each other.

[0022] Meanwhile, an electric vehicle charging system is provided, comprising: the electric vehicle charging cable assembly; and an electric vehicle charger body connected to the electric vehicle charging cable and supplying power to a power unit of the electric vehicle charging cable, wherein the electric vehicle charger body injects refrigerant into an injection tube of the electric vehicle charging cable, and the refrigerant is recovered through the recovery tube from the cable connector, and then the refrigerant is circulated in the electric vehicle charger body.

[0023] The cable assembly for charging an electric vehicle according to the present invention exhibits excellent effects of efficiently cooling the heat generated during charging of an electric vehicle, thereby preventing damage to internal components due to heat and safety accidents such as fire, while minimizing the diameter and increasing the power transmission capacity.

[0024] Fig. 1 is a cross-sectional view of an embodiment of a conventional electric vehicle charging cable.

[0025] Figure 2 schematically illustrates an electric vehicle charging system.

[0026] FIG. 3 is an enlarged view of an electric vehicle connector and an electric vehicle charging cable assembly provided in an electric vehicle in the electric vehicle charging system of FIG. 2.

[0027] FIG. 4 is a cross-sectional view of an embodiment of an electric vehicle charging cable constituting an electric vehicle charging cable assembly according to the present invention.

[0028] FIG. 5 is a cross-sectional view of another embodiment of an electric vehicle charging cable constituting an electric vehicle charging cable assembly according to the present invention.

[0029] Figure 6 schematically illustrates the structure inside a cable connector to which the cable illustrated in Figure 5 is connected.

[0030] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the attached drawings. However, the present invention is not limited to the embodiments described herein and may be embodied in other forms. Rather, the embodiments introduced herein are provided to ensure that the disclosure is thorough and complete, and to sufficiently convey the spirit of the invention to those skilled in the art. Like reference numbers designate like elements throughout the specification.

[0031] Figure 2 schematically illustrates an electric vehicle charging system.

[0032] In the electric vehicle charging system according to the present invention, the electric vehicle charger body (300) is connected to an electric vehicle charging cable assembly including an electric vehicle charging cable (100) and a cable connector (200) provided at one end of the electric vehicle charging cable (100) to supply power to the electric vehicle. Here, the cable connector (200) is mounted on an electric vehicle connector (400) provided in the electric vehicle (EV) and can supply power by making electrical contact therewith, and in the case of a rapid charger, charging of the electric vehicle can be completed in a short period of time.

[0033] The electric vehicle charging cable assembly that electrically connects the electric vehicle charger body (300) and the electric vehicle (EV) may generate heat due to its large current capacity, and in order to resolve the risk of fire or user anxiety, the electric vehicle charging cable assembly according to the present invention uses a method of cooling the electric vehicle charging cable (100) and cable connector (200) by injecting a refrigerant such as air or coolant into the electric vehicle charging cable (100) using a pump provided in the electric vehicle charger body (300).

[0034] Fig. 3 is an enlarged view of an electric vehicle connector and an electric vehicle charging cable assembly provided in an electric vehicle in the electric vehicle charging system of Fig. 2. The cable connector (200) illustrated in Fig. 3 is a connector of the American-European "combo" type, one of the unified standards, and is a type of connector that allows for both AC slow charging and DC rapid charging with a single connector, to which the electric vehicle charging cable (100) according to the present invention can be applied.

[0035] However, the electric vehicle charging cable (100) according to the present invention can be applied to cable connectors of the Japanese 'CHAdeMO' method, the Renault 'AC 3-phase' method, or other methods in addition to the American / European 'combo' method shown in FIG. 3.

[0036] As illustrated in FIG. 3, a cable connector (200) is coupled to an end of an electric vehicle charging cable (100) constituting an electric vehicle charging cable assembly according to the present invention, and the cable connector (200) has a structure that can be detachably mounted on an electric vehicle connector (400) provided in an electric vehicle (EV).

[0037] The 'combo' type cable connector is an integrated AC or DC type connector, and each connector is equipped with an AC charging section (210, 410) and a DC charging section (230, 430).

[0038] Since the electric vehicle charging cable (100) connected to the cable connector (200) of this type may have a problem of heat generation due to a large current during rapid charging, the electric vehicle charging cable (100) according to the present invention solves the problem of heat generation by using a refrigerant, and at the same time, the diameter of the power unit is reduced compared to the conventional electric vehicle charging cable in which a cooling tube through which the refrigerant can flow is provided inside the power unit, thereby minimizing the dead space, which is an unnecessary space between the power units, and at the same time, the overall diameter and weight of the cable can be reduced.

[0039] FIG. 4 is a cross-sectional view of an embodiment of an air-cooled electric vehicle charging cable constituting an electric vehicle charging cable assembly according to the present invention.

[0040] As illustrated in FIG. 4, the electric vehicle charging cable (100) comprises: a plurality of power units (10a, 10b, 10c, 10d) including conductors (11a, 11b, 11c, 11d) and insulating layers (13a, 13b, 13c, 13d) wrapping each of the conductors (11a, 11b, 11c, 11d); at least one grounding unit (20) including a grounding conductor (21) and an insulating layer (23) wrapping the grounding conductor (21); at least one communication unit (30a, 30b) including a plurality of communication unit cores including conductors (31a, 31b) and insulating layers (33a, 33b) wrapping the conductors (31a, 31b) and a communication unit jacket (35a, 35b) wrapping the plurality of communication unit cores as a whole; It includes a tube-shaped cable jacket (70) that entirely surrounds the plurality of power units (10a, 10b, 10c, 10d), the grounding unit (20), and the one or more communication units (30a, 30b), and includes at least a part of an empty space inside the cable jacket (70) where the plurality of power units (10a, 10b, 10c, 10d), the grounding unit (20), the one or more communication units (30a, 30b), etc. are not arranged, and includes a refrigerant passage (90) that is connected from one end of the electric vehicle charging cable (100) to the other end, and the refrigerant passage (90) further includes an injection tube (80a) for injecting refrigerant.

[0041] In particular, the power units (10a, 10b, 10c, 10d) include two or more power units each having the same polarity, for example, one pair of power units (10a, 10c) has a conductor (11a, 11c) having a positive (+) polarity, while the other pair of power units (10b, 10d) has a conductor (11b, 11d) having a negative (-) polarity, and an empty space (90b) surrounded by these power units (10a, 10b, 10c, 10d) is formed, and the empty space (90b) can function as a passage through which a refrigerant that is injected through the refrigerant passage (90) or the injection tube (80a) to cool the cable connector and is recovered flows.

[0042] Accordingly, by minimizing the diameter of each of the power units (10a, 10b, 10c, 10d), the dead space, which is an unnecessary space between the power units (10a, 10b, 10c, 10d) and the cable jacket (70), can be minimized, and further, the diameter and weight of the entire cable can be reduced, thereby realizing compactness and improving flexibility, and the circularity of the cable can be further improved.

[0043] For example, when the refrigerant is air, the electric vehicle charger body (300) cools the electric vehicle charging cable (100) and the cable connector (200) provided at the other end thereof by injecting air, preferably compressed air of 1.5 to 5 bar, into the refrigerant passage (90) or injection tube (80a) from one end of the electric vehicle charging cable (100) through a pump, and the air that has undergone the cooling may be discharged to the outside through a separate air exhaust port provided in the cable connector (200) or recovered through a circulation structure provided in the cable connector (200) or an empty space (90b) between the power units (10a, 10b, 10c, 10d).

[0044] Here, the air exhaust port can be configured in various forms, and is preferably configured so that the air is cooled to the terminal within the cable connector and then exhausted. In addition, the cross-sectional area of ​​the air exhaust port formed in the cable connector is preferably formed smaller than the cross-sectional area of ​​the empty space that serves as the refrigerant passage in the cable, because this facilitates cooling by air throughout the interior of the cable by applying a pressure higher than atmospheric pressure to the refrigerant passage within the cable jacket.

[0045] From this point of view, it is desirable that the cross-sectional area of ​​the air outlet be 5 to 50% of the cross-sectional area of ​​the empty space.

[0046] In addition, the reason for injecting compressed air into the refrigerant passage (90) is that when the injected air has a pressure above a certain level, it can penetrate between components such as the power unit (10a, 10b, 10c, 10d), grounding unit (20), and communication unit (30a, 30b) inside the cable jacket (70) to perform uniform and effective cooling.

[0047] Accordingly, the electric vehicle charging cable (100) according to the present invention efficiently cools the heat generated when charging an electric vehicle, thereby preventing damage to the internal components due to heat and safety accidents such as fire, and at the same time, to resolve heat generation, the conductor diameter can be increased or a separate cooling tube arranged inside the conductor can be omitted, thereby exhibiting an excellent effect of increasing the transmission capacity while minimizing the overall diameter.

[0048] And, the total cross-sectional area of ​​the refrigerant passage (90) may be 10% to 50% of the total cross-sectional area of ​​the cable at any cross-section of the electric vehicle charging cable (100). Here, if the total cross-sectional area of ​​the refrigerant passage (90) is less than 10%, the contact area between the injected compressed air and the power unit (10a, 10b, 10c, 10d) may be insufficient, thereby reducing the cooling effect, whereas if it exceeds 50%, the diameter of the cable may be unnecessarily increased.

[0049] In addition, the components provided inside the cable jacket (70), such as the power unit (10a, 10b, 10c, 10d), the grounding unit (20), and the communication unit (30a, 30b), may be arranged without being twisted with each other, but it is preferable that they are twisted with each other at a constant pitch overall to be structurally stable. The pitch may be based on the outer diameter of the entire twisted components. For reference, the pitch refers to the horizontal length until any point of the twisted components returns to its original position due to twisting.

[0050] Meanwhile, in the power unit (10a, 10b, 10c, 10d), the conductor (11a, 11b, 11c, 11d) may be a composite conductor formed by combining multiple conductors, such as a single conductor or a plurality of conductor wires, and the material may be made of copper or a copper alloy material having excellent conductivity. In addition, the multiple composite conductors in the composite conductor may be twisted with each other at a composite pitch of 9 to 11 times the outer diameter of the entire composite conductor.

[0051] In addition, a taping layer (12) that wraps the conductors (11a, 11b, 11c, 11d) may be further provided on the outside of the conductors (11a, 11b, 11c, 11d). An insulating layer (13a, 13b, 13c, 13d) may be provided on the outside of the taping layer (12), and the insulating layers (13a, 13b, 13c, 13d) of a pair of power units (10a, 10b, 10c, 10d) may be composed of different colors. The material of the insulating layer may be composed of a synthetic resin, for example, rubber or plastic material.

[0052] In addition, the electric vehicle charging cable (100) according to an embodiment of the present invention may be filled with a thermally conductive material in the empty space inside the cable jacket (70) to ensure that the heat generated when the conductor is energized is quickly transferred to the external refrigerant passage (90). The thermally conductive material may be, for example, a material in the form of a thermal compound, and must have a certain degree of fluidity because it must be injected between the conductors of a flexible cable.

[0053] The thermal conductivity of the above thermally conductive material may be 0.5 W / m·K or more, and more preferably, it may be configured to be about 0.5 W / m·K to 5.0 W / m·K. Here, when the thermal conductivity of the above thermally conductive material is less than 0.5 W / m·K, the cooling effect may be reduced, whereas when it is more than 5.0 W / m·K, it was confirmed that the cable manufacturing cost increases significantly or it is difficult to satisfy the fluidity or viscosity conditions described below.

[0054] The above thermally conductive material may be composed of, for example, a mixture of a siloxane polymer and a thermally conductive metal oxide, but may be composed of various materials as long as they have a certain degree of fluidity and thermal conductivity.

[0055] The viscosity of the thermally conductive material for constructing the electric vehicle charging cable (100) that must have a certain degree of flexibility is 10 at room temperature (20 degrees Celsius). 3 cps to 10 6It is desirable to satisfy the cps level. The viscosity is 10 3 If the viscosity is less than cps, the fluidity becomes too large and flows out of the taping layer (12) surrounding the conductors (10a, 10b), so that the thermal conductive material cannot be uniformly filled between each conductor, and thus the cooling effect may be reduced, and if the viscosity is less than 10 6 If the cps is exceeded, the flexibility of the electric vehicle charging cable (100) is reduced, and due to the characteristics of the usage environment in which the cable is repeatedly bent and moved, cracks in the thermally conductive material may occur, which may result in a decrease in thermal conductivity performance.

[0056] Meanwhile, in order to prevent electric shock accidents when the above leakage current occurs, the grounding conductor (21) in the grounding unit (20) may also be configured in the form of a collective conductor, and the material of the grounding insulating layer (23) may be composed of a synthetic resin, such as rubber or plastic, similar to the insulating layer of the power unit.

[0057] The above insulating layer (33a, 33b) may be composed of rubber, plastic material, etc., and the communication unit jacket (35a, 35b) may also be composed of rubber, plastic material, etc.

[0058] Meanwhile, the cable jacket (70) performs the function of protecting the internal components from external impact or pressure, and the material may be composed of rubber or plastic, but is not limited thereto as long as it is a material that can form an empty space inside. In order to sufficiently form a refrigerant passage (90) corresponding to the internal empty space between the cable jacket and the power unit, the cable jacket (70) may be manufactured in a tube shape, by inserting a combination of power units (10a, 10b, 10c, 10d), grounding units (20), and communication units (30a, 30b) into the cable jacket (70), or the cable jacket (70) may be extruded onto the combination using a die nipple. When the cable jacket is formed using a general extrusion method, as shown in FIG. 1, the inner shape of the cable jacket is formed along the outer periphery of the internal components, so that the thickness of the cable jacket is not constant, and thus a sufficient empty space is not secured inside the cable jacket. Therefore, in the present invention, the cable jacket may be extruded using a tube extrusion method so that the cable jacket can have a tube shape.

[0059] Meanwhile, FIG. 5 is a cross-sectional view of another embodiment of an electric vehicle charging cable constituting an electric vehicle charging cable assembly according to the present invention.

[0060] As illustrated in FIG. 5, when the refrigerant is a liquid such as cooling water, a recovery tube (80b) may be provided in the empty space (90b) surrounded by the power units (10a, 10b, 10c, 10d) to recover the refrigerant that has been injected through the injection tube (80a) and cooled the cable connector, and when the refrigerant is recovered through the recovery tube (80b), the recovered refrigerant may further cool the power units (10a, 10b, 10c, 10d), and the empty space (90b) may be filled with the thermally conductive material to improve the heat exchange efficiency between the recovery tube (80b) and the power units (10a, 10b, 10c, 10d).

[0061] Here, the inner diameter of the recovery tube (80b) may be larger than or equal to the inner diameter of the injection tube (80a). Here, if the inner diameter of the recovery tube (80b) is smaller than that of the injection tube (80a), a problem of compressed air being recovered into the cable (100) through the recovery tube (80b) flowing back may occur.

[0062] Figure 6 schematically illustrates the structure inside a cable connector to which the cable illustrated in Figure 5 is connected.

[0063] As illustrated in FIG. 6, the conductor of each of the power units (10a, 10c) exposed by partially stripping the cable jacket (70) at one end of the cable (100) is connected to each of the connector terminals (220, 240) through the crimped conductor sleeve (271), and the conductor of each of the power units (10b, 10d) is connected to each of the connector terminals (220, 240) through the crimped conductor sleeve (272), and the connector terminals (220, 240) are again connected to the AC charging unit (210, 410) or the DC charging unit (230, 430).

[0064] In addition, one of the connector terminals (220, 240) is provided with a first connection portion (221) to which the injection tube (80a) is connected, the other connector terminal is provided with a second connection portion (241) to which a recovery tube (80b) for recovering compressed air into the refrigerant passage (90b) inside the cable (100) is connected, and each of the connector terminals (220, 240) may be provided with a third connection portion (222, 242) to which a connecting tube for connecting them to each other is connected. Here, the other end of the recovery tube (80b) is connected to a refrigerant tank or the like provided in the electric vehicle charger body (300) for circulating the refrigerant.

[0065] Accordingly, the refrigerant injected through the injection tube (80a) can be injected into one connector terminal (220) through the first connection portion (221) to cool the connector terminal (220), and then injected into another connector terminal (240) through the third connection portion and the connection tube connected thereto to cool the other connector terminal (240), and then recovered into the cable (100) through the second connection portion (241) and the recovery tube (80b) connected thereto.

[0066] While this specification has described preferred embodiments of the present invention, those skilled in the art will appreciate that various modifications and variations can be made to the present invention without departing from the spirit and scope of the invention as defined in the claims below. Therefore, any modified implementation that fundamentally includes the elements of the claims should be considered within the technical scope of the present invention.

Claims

1. An electric vehicle charging cable that connects the electric vehicle charger body and the cable connector for electric vehicle charging. A plurality of power units including a conductor and an insulating layer surrounding the conductor; and A cable jacket surrounding the above plurality of power units; The above plurality of power units include two or more power units having the same polarity, An electric vehicle charging cable, wherein an empty space is formed inside the cable jacket to secure a refrigerant path through which refrigerant injected from the electric vehicle charger body into the cable jacket can flow.

2. In paragraph 1, An electric vehicle charging cable, characterized in that the total cross-sectional area of ​​the refrigerant passage is 10 to 50% of the total cross-sectional area of ​​the cable at any cross-section of the electric vehicle charging cable.

3. In paragraph 1, A cable for charging an electric vehicle, characterized in that it further includes an injection tube into which refrigerant is injected into the empty space between the cable jacket and the power unit among the above empty spaces.

4. In paragraph 3, A cable for charging an electric vehicle, characterized in that the empty space surrounded by the plurality of power units among the above empty spaces additionally includes a recovery tube for recovering the refrigerant injected through the injection tube.

5. In paragraph 4, A cable for charging an electric vehicle, characterized in that the inner diameter of the above recovery tube is larger than or equal to the inner diameter of the above injection tube.

6. In paragraph 4, A cable for charging an electric vehicle, characterized in that the empty space between the plurality of power units and the recovery tube is filled with a thermally conductive material.

7. In any one of paragraphs 1 to 6, A cable for charging an electric vehicle, characterized in that the cable jacket has a tube shape.

8. In any one of paragraphs 1 to 6, The above electric vehicle charging cable is characterized in that it includes a grounding unit including a grounding conductor and an insulating layer surrounding the grounding conductor.

9. In any one of paragraphs 1 to 6, The above electric vehicle charging cable is characterized in that it further includes at least one communication unit including a plurality of communication unit cores including a conductor and an insulating layer wrapping the conductor, and a communication unit jacket wrapping the plurality of communication unit cores entirely.

10. As a cable assembly for electric vehicle charging, A cable for charging an electric vehicle according to any one of claims 1 to 6, one end of which is connected to a main body of an electric vehicle charger, and a cable connector connected to the other end of the cable for charging an electric vehicle, A cable assembly for charging an electric vehicle, characterized in that the cable connector includes a plurality of connector terminals each connected to a conductor of the plurality of power units.

11. In paragraph 10, Including the electric vehicle charging cable of Article 4, A cable assembly for charging an electric vehicle, wherein one of the plurality of connector terminals is provided with a first connection portion to which the injection tube is connected, another of the plurality of connector terminals is provided with a second connection portion to which the recovery tube is connected, and each of the connector terminals is provided with a third connection portion to which a connecting tube is connected to connect the connector terminals to each other.

12. Cable assembly for electric vehicle charging of clause 11; and Includes an electric vehicle charger body that is connected to the electric vehicle charging cable and supplies power to the power unit of the electric vehicle charging cable, An electric vehicle charging system, characterized in that the electric vehicle charger body injects refrigerant into the injection tube of the electric vehicle charging cable, the refrigerant is recovered through the recovery tube in the cable connector, and the refrigerant is circulated in the electric vehicle charger body.

Images