WO2021091216A1

WO2021091216A1 - Cable assembly for charging electric vehicle

Info

Publication number: WO2021091216A1
Application number: PCT/KR2020/015301
Authority: WO
Inventors: 이재복; 김현웅; 유동균
Original assignee: 엘에스전선 주식회사
Priority date: 2019-11-06
Filing date: 2020-11-04
Publication date: 2021-05-14
Also published as: KR20220112722A; KR102667074B1

Abstract

The present invention relates to a cable assembly for charging an electric vehicle that efficiently cools, by using a cooling fluid, heat generated from a cable for charging an electric vehicle and a connector when an electric vehicle is charged, prevents internal structure damage caused by heat, prevents safety accidents, minimizes user discomfort, and enables the diameter of the cable for charging the electric vehicle to be minimized.

Description

Electric vehicle charging cable assembly

The present invention relates to a cable assembly for charging an electric vehicle having a cooling function. More specifically, the present invention efficiently cools the heat generated from the electric vehicle charging cable and connector when charging the electric vehicle by using a cooling fluid, prevents damage to the internal structure due to heat, prevents safety accidents, and prevents user discomfort. The present invention relates to a cable assembly for electric vehicle charging that can minimize the diameter of the electric vehicle charging cable.

With the spread of electric vehicles, the installation of electric vehicle chargers is expanding. In addition, rapid chargers capable of fast charging have been popularized to enable charging within a short period of time. Unlike slow charging, the output voltage of the fast charger for fast charging is in the range of 50V to 450V DC, the output current is 110A, and the output current of the recent super fast charging reaches 400A, and the time required to charge the electric vehicle through the fast charger is It only takes tens of minutes. The output current of the rapid charger is expected to increase according to the battery capacity of the electric vehicle.

In such a rapid charger, an electric vehicle charging cable is connected to the main body, a charger connector is mounted at an end of the charging cable, and electricity is supplied from the electric vehicle charger to the electric vehicle by attaching the connector of the charger to the electric vehicle connector provided in the electric vehicle.

Since such a rapid charger has an output current of several hundred amperes, heat generation of an electric vehicle charging cable or electric vehicle connector that transmits it to the electric vehicle may be problematic. In order to minimize the heat generated from the electric vehicle charging cable and connector, there is a method such as increasing the diameter of the conductor of the electric vehicle cable, but it is difficult to sufficiently reduce the heat generation, and there is a problem of increasing the weight of the electric vehicle charging cable.

Heat generated by electric vehicle charging cables can increase the risk of fire. In addition, in the process of attaching the charger connector to the electric vehicle connector for charging the electric vehicle or detaching the charger connector from the electric vehicle connector and mounting it on the charger, the charging cable may come into contact with the user's body. This is undesirable because it can cause injury, discomfort or anxiety.

In addition, the terminals of the electric vehicle charging cable and the electric vehicle connector are connected at the electric vehicle connector, and heat generation is high due to the connection of the conductor and the terminal, and the electric vehicle connector is a part that contacts the body such as the user's hand, so the cooling performance is improved. Required.

In the conventionally introduced electric vehicle connector, a structure for collecting cooling fluid through the electric vehicle connector has been introduced, but no cooling structure has been introduced that sufficiently cools the connector terminals constituting the electric vehicle connector in the process of recovering the cooling fluid.

The present invention efficiently cools the heat generated from the electric vehicle charging cable and connector when charging the electric vehicle using a cooling fluid, prevents damage to the internal structure due to heat, prevents safety accidents, and minimizes user discomfort, It is an object to be solved to provide an electric vehicle charging cable assembly that can minimize the diameter of the electric vehicle charging cable.

In order to solve the above problems, the present invention provides an electric vehicle charging cable assembly for connecting an electric vehicle connector and an electric vehicle charger, comprising: a conductor; An insulating layer surrounding the conductor; And a pair of power units having a cooling tube surrounding the outside of the insulating layer. A recovery unit for recovering the cooling fluid supplied through the cooling tubes of the pair of power units; A pair of connector terminals each connected to a conductor of the power unit and constituting the electric vehicle connector; And a chamber space for cooling the connector terminal when the connector terminal is mounted, the power unit and the recovery unit are connected, and a cooling fluid is introduced through the cooling flow path of the power unit to be recovered to the recovery unit. It is possible to provide a cable assembly for charging an electric vehicle including a; chamber housing provided.

In addition, the chamber housing includes a pair of terminal mounting portions through which the connector terminals are mounted, an inlet through which the cooling fluid through the pair of power units is introduced, and the cooling fluid introduced through the inlet is discharged through the chamber space. The outlet may be provided.

In addition, the pair of terminal mounting portions are arranged in the form of a pair of spaced pipes that connect and cross the front and rear of the chamber space in the inner chamber space of the chamber housing, and a spacer is formed therebetween, and the chamber housing The inner surface of the inner chamber space and the pair of terminal mounting portions are spaced apart from each other to form a pair of bypass portions for bypassing the cooling fluid,

The inlet port and the outlet port may be provided at the rear of the chamber housing with the spaced portion therebetween.

Here, the cooling fluid introduced into the inlet may be distributed and flowed to the separation portion and the bypass portion, and may be discharged to the outlet after cooling by wrapping the outer peripheral surface of the terminal mounting portion exposed in the chamber space.

In this case, the inlet may be provided above the chamber housing, and the outlet may be provided below the chamber housing.

In addition, the cooling fluid introduced from the inlet may be discharged to the outlet through the separation portion and the peripheral portion of the terminal mounting portion.

In addition, the pair of terminal mounting portions are configured in the form of pipes crossing each of the chamber spaces inside the chamber housing, and blades protruding from at least one outer circumferential surface of the pair of terminal mounting portions exposed to the inner space of the chamber housing are provided. At least one may be provided.

In addition, the area of the inlet port may be 1 to 4 times the size of the outlet port.

Here, the inner diameter of the inlet may be larger than the width of the spacer.

In this case, a cross-sectional shape of the chamber housing in a direction perpendicular to a direction in which the power unit and the recovery unit are connected may be formed in a shape with a rounded corner.

In addition, it may further include a branched collecting pipe connected to each cooling tube of the pair of power units, and a connecting pipe connecting the collecting pipe and the inlet of the chamber housing.

In addition, it further includes a closing pipe for connecting the cooling fluid flowing through the cooling tube of each power unit to the collection pipe, the collection pipe may be connected to the closing pipe mounted at the end of each power unit.

In addition, the outlet of the chamber housing may be directly connected to the recovery unit.

In addition, the insulating layer of the power unit may tightly wrap the conductor so that the conductor is not exposed to the cooling fluid.

Here, the conductor covered with the insulating layer of each power unit may pass through the closing tube and be connected to the rear of the connector terminal.

In this case, the inlet of the chamber housing may be provided in a diagonal direction in the chamber housing, and the connection pipe may be formed in a shape bent to correspond to the inlet angle.

In addition, the power unit may further include a spacer for preventing contact between the insulating layer and the cooling tube and forming a cooling passage through which a cooling fluid flows.

In addition, the spacer of the power unit may be configured in a wire shape.

In addition, the spacer may be spirally wound and disposed between the insulating layer of the power unit and the cooling tube.

Here, the spacer may be at least one protrusion integrally formed on the outer surface of the insulating layer or the inner surface of the cooling tube of the conductor.

In this case, it may further include at least one grounding unit and at least one communication unit together with the power unit.

In addition, at least one of the cooling tube and the spacer may be made of a Teflon-based or urethane material.

According to the electric vehicle charging cable assembly according to the present invention, heat generated from the electric vehicle charging cable and connector during rapid charging of the electric vehicle can be efficiently cooled using a cooling fluid.

More specifically, according to the electric vehicle charging cable assembly according to the present invention, a conductor having an insulating layer constituting a power unit is disposed inside a cooling tube through which a cooling fluid flows in a non-contact state to cool the power unit to generate heat. You can maximize performance.

In addition, according to the electric vehicle charging cable assembly according to the present invention, the conductor provided with the insulating layer constituting the power unit is disposed in a non-contact state with the inner surface of the cooling tube, so that all surfaces of the insulating layer surrounding the conductor can be cooled. , Melting of a local area of the insulating layer surrounding the conductor can be prevented by the cooling deviation of each area.

In addition, according to the electric vehicle charging cable assembly according to the present invention, the conductor provided with the insulating layer constituting the power unit is accommodated in a cooling tube to supply cooling fluid from the charger, and the cooling fluid used for cooling is recovered to the charger. It is possible to uniformly cool the conductor provided with the insulating layer.

In addition, according to the electric vehicle charging cable assembly according to the present invention, the cooling fluid in the chamber housing allows the cooling fluid to flow around the terminal mounting portion where the connector terminal is mounted, thereby rapidly cooling the heat of the connector terminal to cool the electric vehicle charging connector. Performance can also be improved.

In addition, according to the electric vehicle charging cable assembly according to the present invention, by optimizing the flow path area of the inlet through which the cooling fluid flows into the chamber housing and the outlet through which the cooling fluid is recovered, induces turbulence in the chamber housing to cool the connector terminals. It can improve performance.

In addition, according to the electric vehicle charging cable assembly according to the present invention, it is possible to cool connector components other than the cable including the power unit, thereby preventing fire due to overheating of the connector or cable, and the connector on the body of electric vehicle charger users. Alternatively, even when the cable is in contact, it is possible to minimize anxiety or discomfort caused by heat generation.

In addition, according to the electric vehicle charging cable assembly according to the present invention, the overall diameter of the electric vehicle charging cable can be made more compact than a technology in which a cooling tube is provided separately from the power unit.

1 shows an electric vehicle and an electric vehicle charger.

2 shows a connector of an electric vehicle and an electric vehicle charger.

3 shows a cross-sectional view of a cable for charging an electric vehicle according to the present invention.

4 and 5 show an internal structure and a perspective view of a power unit constituting a cable for charging an electric vehicle according to the present invention.

6 to 8 show a power unit and a cooling fluid recovery unit and a connector connection structure constituting the electric vehicle charging cable according to the present invention.

9 and 10 are perspective views illustrating an assembled state and an exploded state of a connector terminal constituting an electric vehicle charging cable assembly according to the present invention and a chamber housing in which the connector terminal is mounted.

11 and 12 show a front view and a side view of a chamber housing constituting a cable assembly for charging an electric vehicle according to the present invention.

13 and 14 are cross-sectional views of embodiments of a chamber housing constituting a cable assembly for charging an electric vehicle according to the present invention.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying 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 so that the disclosed content may be thorough and complete, and the spirit of the invention may be sufficiently conveyed to those skilled in the art. The same reference numerals represent the same elements throughout the specification.

In addition, in the following description, an electric car (ev, electric car) refers to a vehicle that drives an electric motor using electric energy charged in a battery provided in the vehicle and uses the driving force of the motor as the power of the vehicle. Means plug-in electric vehicle (PEV).

However, the above electric vehicle (ev) should not be limitedly interpreted as a conventional road passenger vehicle, and should be understood as a concept including a cart, a work vehicle, or a two-wheeled vehicle in addition to a road passenger vehicle.

1 shows an electric vehicle ev and an electric vehicle charger 300.

The electric vehicle charger 300 is connected with an electric vehicle charging connector 200 and an electric vehicle charging cable 100 to supply power to an electric vehicle, and an electric vehicle charging connector 200 is provided at the end of the electric vehicle charging cable 100 do.

The electric vehicle charging connector 200 is mounted on the electric vehicle connector 400 provided in the electric vehicle ev to supply power, and in the case of a rapid charger, charging of the electric vehicle can be completed in a short time.

The electric vehicle charging cable 100 electrically connecting the electric vehicle charger 300 and the electric vehicle ev may generate heat due to its large current capacity, and the electric vehicle of the present invention may be used to relieve the risk of fire or user anxiety. The charging cable 100 uses a method of cooling the electric vehicle charging cable 100 using a cooling fluid.

FIG. 2 shows an electric vehicle charging connector 200 to which an electric vehicle connector 400 provided in an electric vehicle and an electric vehicle charging cable 100 are connected. The electric vehicle charging connector shown in FIG. 2 is an American-European'combo' type connector, which is one of the unified standards, and is a type of connector capable of slow charging in an alternating current method or rapid charging in a direct current method with one connector. The electric vehicle charging cable 100 can be applied.

However, in addition to the US-European'combo' method shown in FIG. 2, the electric vehicle charging cable 100 of the present invention is a Japanese'CHAdeMO' method, or a Renault'AC three-phase' method or other method of charging an electric vehicle. It can also be applied to the connector.

As shown in Figure 2, the electric vehicle charging connector 200 is fixed at the end of the electric vehicle charging cable 100 of the present invention, the electric vehicle charging connector 200 is an electric vehicle connector provided in the electric vehicle (ev) It has a structure that can be detachably mounted on the 400.

In the'combo' type electric vehicle charging connector, an AC or DC type connector is integrated, and each connector includes an

AC charging unit

210 and 410 and a

DC charging unit

230 and 430, respectively.

Since the electric vehicle charging cable 100 connected to such an electric vehicle charging connector may cause heat generation due to a large amount of current during rapid charging, the electric vehicle charging cable 100 of the present invention uses a cooling fluid to solve the heating problem. I did.

A structure for cooling the electric vehicle charging cable 100 using a cooling fluid has already been introduced, but since a separate cooling fluid flow path must be provided in the electric vehicle charging cable 100, cooling efficiency decreases and the electric vehicle charging cable ( There was a problem of increasing the diameter of 100).

In the electric vehicle charging cable 100 of the present invention, a cooling unit having a fluid pipe is disposed inside each power unit constituting the electric vehicle charging cable 100, so that heat is absorbed to the entire outer circumference of the cooling unit, thereby improving cooling efficiency. , While minimizing the diameter of the electric vehicle charging cable 100, stable cooling performance was secured. It will be described in detail.

3 shows a cross-sectional view of the electric vehicle charging cable 100 of the present invention.

The electric vehicle charging cable 100 of the present invention includes at least one grounding unit 30; At least one communication unit 50; A conductor 11 provided with an insulating layer 13, a cooling tube 17 accommodating the conductor 11 with an insulating layer, and a spacer 19 provided between the conductor 11 and the inner surface of the cooling tube Power unit 10 comprising a; A recovery unit 20 configured including a recovery tube 27; And an outer jacket surrounding the ground unit, the communication unit, the power unit, and the recovery unit.

Each communication unit 50 and the grounding unit 30 may be covered with a coating layer, and if necessary, an intervening 40 for maintaining the original cable shape may be provided, and a central tension for reinforcing tensile force if necessary. Lines may be provided.

Conventionally, a cable for charging an electric vehicle in which the grounding unit 30 and the like is composed of one large unit has been introduced, but in the present invention, since the recovery unit 20 for recovering the cooling fluid is separately provided, in order to minimize the increase in the diameter of the cable. The cable diameter can be minimized by dividing the grounding unit 30 into a plurality and arranging the plurality of grounding units 30 in the air gaps between other units.

During charging, the communication unit 50 for transmitting sensor data or control data related to charging between the charger and the electric vehicle may also be divided into a plurality of pieces for the same reason as the ground unit 30.

In addition, the electric vehicle charging cable 100 of the present invention is supplied through the cooling tube 17 of a pair of power units 10a and 10b to recover the cooling fluid used for cooling conductors and connectors back to the electric vehicle charger. The recovery flow path 25 may be provided with a recovery unit 20 including a recovery tube 27 provided therein.

The recovery unit 20 may be provided to recover the cooling fluid supplied from the charger to the connector and used for cooling, and to auxiliaryly cool the inner space of the outer jacket constituting the electric vehicle charging cable.

The power unit 10 has its own cooling tube to perform its own cooling, but when the internal temperature of the outer jacket 70 rises, for example, in the summer when the external temperature is high, the electric vehicle charging cable itself The temperature of may increase, and the recovery unit 20 may auxiliaryly lower the temperature of the entire cable in the process of recovering the cooling fluid.

Since one recovery unit 20 may be provided, and one recovery unit 20 needs to recover the cooling fluid supplied through the two power units, it is less than the cross-sectional area of the cooling flow path 15 of one power unit. It may be provided with a recovery tube (27) provided with a large recovery passage (25).

The cooling tube 17 and the spacer 19 constituting the power unit 10 and the recovery tube 27 constituting the recovery unit 20 are made of a material capable of flowing a cooling fluid and having excellent heat resistance and oil resistance. It is desirable to be. Such a material may be made of a general resin, polyethylene, urethane, fluorinated polyethylene (PTFE, Polytetrafluoroethylene), or a general resin or polyethylene, and the surface may be coated with a material such as fluorinated polyethylene having excellent heat resistance.

Polyurethane has excellent tensile strength and tear strength and is more eco-friendly than PVC materials. In addition, the fluorinated polyethylene material may be, for example, Teflon-based. Teflon has excellent heat resistance with a heat resistance of -60℃ to +260℃. Therefore, by applying such a Teflon series, it is possible to minimize external heat transfer that causes discomfort or anxiety of the user, and also minimize internal heat transfer in the shell coating process, etc., to prevent melting of the internal configuration, etc., thereby ensuring insulation performance.

In addition, the electric vehicle charging cable 100 of the present invention includes an outer jacket 70 surrounding the grounding unit 30, the communication unit 50, the power unit 10, and the recovery unit 20. In addition, an additional insulating layer 60 may be provided to block heat from inside the cable from being transferred to the outside.

The heat insulating layer 60 may be made of a Teflon-based material having excellent heat resistance like the cooling tube, or a fiber braid having low thermal conductivity and good flexibility may be applied.

A pair of power units 10a and 10b in which heat generation is a problem in the electric vehicle charging cable may be cooled by a cooling fluid supplied to circulate the inside, respectively.

Specifically, the power unit 10 includes a conductor 11 provided with an insulating layer 13, a cooling tube 17 in which the conductor 11 is accommodated and a cooling fluid flows in a predetermined direction, and the conductor 11 ) Is accommodated in the cooling tube 17, in order to prevent contact between the insulating layer 13 of the conductor 11 and the inner surface of the cooling tube 17, the conductor 11 and the cooling tube 17 ) It may be configured to include a spacer 19 provided between the inner surface.

The insulating layer 13 of the power unit may be configured to tightly surround the conductor 11 so that the conductor 11 is not exposed to the cooling fluid regardless of the insulation of the cooling fluid.

The conductors 11 of the power unit 10 may be accommodated in the cooling tube 17 with an insulating layer 13 provided, respectively. The conductor provided with the insulating layer 13 accommodated in the cooling tube 17 is provided with a cooling channel 15 outside it, so that heat that may be generated when power is supplied can be effectively cooled. The conductor 11 may be formed of a copper (Cu) material having high electrical conductivity and low heat generation, and an insulating layer surrounding the conductor 11 may be formed of an XLPE material capable of applying a high voltage.

The current supplied through the conductor of the power unit 10 may reach a maximum of 400A.

XLPE (Crosslinked Polyethylene) is an insulating material formed by modifying the chemical structure of polyethylene through a crosslinking reaction.

In addition to pure water, the cooling fluid that can be supplied to the cooling tube 17 includes at least one of inorganic additives such as ethylene glycol, phosphate, silicate, and borate, freeze inhibitor, corrosion inhibitor, high temperature stability improver, antifoam agent, or alkaline additive. It may be an added type of coolant, and various liquids may be selected and used according to the installation environment of the electric vehicle charger. In addition, the cooling fluid may be composed of oil other than water as a base, and various additives may be added accordingly.

The electric vehicle charging cable 100 of the present invention connects the electric vehicle charger 300 and the charger connector 200, and the cooling fluid supplied from the electric vehicle charger to the power unit and used for cooling the power unit and the connector is shown in FIG. A method of recovering again to the electric vehicle charger 300 (see FIG. 1) through the collected recovery unit 20, cooling, and then resupplying it may be used.

Accordingly, a cooling device for recooling the cooling fluid and a pumping device for flowing the cooling fluid may be provided in the electric vehicle charger 300 (see FIG. 1), may be provided outside the electric vehicle charger 300, and recovered. The cooling fluid recovered through the recovery tube of the unit 20 may be cooled in a cooling device, pumped in a pumping device, and supplied into the cooling tube 17 constituting the power unit 10.

In summary, a pair of power units 10a and 10b constituting the electric vehicle charging cable 100 connecting the charger connector 200 and the electric vehicle charger 300 are respectively cooled through the cooling tube 17 Is supplied, and the cooling fluid used for cooling may be recovered to the recovery unit 20. The specific recovery structure will be described later.

In order to uniformly cool the conductor constituting the power unit 10, it must have a structure in which a cooling fluid can flow along the outer surface of the insulating layer 13 of the conductor. That is, when the insulating layer 13 of the conductor and the inner surface of the cooling tube 17 are in contact with each other, the cooling performance may be deteriorated. 15) may be uniformly formed along the outside of the insulating layer 13 of the conductor, and a spacer 19 may be provided to prevent contact between the insulating layer 13 of the conductor and the inner surface of the cooling tube 17.

The spacer 19 may be configured in the form of a wire, for example, in the form of a wire or a pipe, or may be configured in the form of a protrusion provided on the outer surface of the insulating layer 13 of the conductor or the inner surface of the cooling tube 17. have. When the spacer is configured in the form of a wire, the spacer may be configured in the form of an annular wire, but the cross-sectional shape of the wire or pipe is not limited to an annular or circular shape.

By providing the spacer 19, surface contact between the outer surface of the insulating layer 13 of the conductor and the inner surface of the cooling tube 17 can be prevented, and turbulence is formed when the cooling fluid flows to maximize the cooling effect. have.

According to this structure, compared to the technology of providing a separate cooling pipe inside the charging cable, the present invention can cool all surfaces of the insulating layer of the conductor, so that the cooling deviation for each area of the insulating layer surface occurs. It is possible to minimize the thickness of the electric vehicle charging cable while providing a cooling function by using a cooling fluid by arranging an insulating conductor inside the cooling channel.

In the embodiment shown in FIGS. 4 and 5, the spacer 19 of the power unit 10 is configured in an annular wire shape, and is shown to be spirally wound along the outer circumferential surface of the conductor. If it is a structure that can prevent contact, it is not limited thereto. That is, the spacer may be formed in the form of a plurality of protrusions protruding from the outer surface of the insulating layer of the conductor or the inner surface of the cooling tube.

In addition, the spacer may be configured in the form of a spiral protrusion integrally formed on at least one of the cooling tube or the insulating layer, and the integral protrusion may be configured to be integrally formed during the extrusion process of the cooling tube or the insulating layer.

The spacer 19 prevents contact between the conductor provided with the insulating layer and the cooling tube, and at the same time, the flow of the cooling fluid forms a turbulence flow, thereby minimizing the temperature deviation of the cooling fluid in the flow path, thereby reducing the cooling fluid. Since it can be used more efficiently, the cooling performance can be further enhanced by absorbing heat as quickly as possible from the heating conductor as much as possible.

Therefore, according to the electric vehicle charging cable assembly according to the present invention, the cooling performance of the heating conductor is maximized by arranging a conductor insulated in a non-contact state with the inner surface of the cooling tube inside the cooling tube provided with the cooling flow path through which the cooling fluid flows. I can.

The electric vehicle charging cable assembly according to the present invention comprises a conductor 11; An insulating layer 13 surrounding the conductor 11; A cooling tube 17 surrounding the insulating layer 13; And a pair of power units 10 including spacers 19 for preventing contact between the insulating layer 13 and the cooling tube 17 and forming a cooling passage through which a cooling fluid flows. One recovery unit 20 for recovering the cooling fluid supplied through the pair of cooling tubes of the power unit; A pair of connector terminals 231 each connected to the conductor 10 of the power unit 10 and constituting the electric vehicle connector; And the connector terminal 231 is mounted, the power unit 10 and the recovery unit 20 are connected, and the cooling fluid passing through the power unit 10 is collected and recovered to the recovery unit. It may be configured to include a chamber housing 227 having a chamber space 227d (refer to FIGS. 13 and 14) for cooling the connector terminal 231.

The electric vehicle charging cable 100 of the present invention has a charger connector 200 connected to one end and an electric vehicle charger 300 connected to the other end, as shown in FIGS. 1 and 2, so that power supply and transmission of control signals are possible. It is done.

The conductor 11 of each power unit is connected to the terminal 231 of the connector to form a connection part. Since the electric vehicle charging connector has a variety of standards, in FIGS. 6 to 8, the connection relationship between the power unit 10 and the terminal 231 of the connector of the recovery unit 20 will be outlined.

The cooling fluid supplied through the cooling tube 17 of the pair of power units 10a and 10b cools the conductor of the power unit during the flow process, and is collected from the electric vehicle connector connected to the end of the electric vehicle charging cable 100. It may be recovered to the electric vehicle charger 300 through the recovery unit 20.

It is preferable that the electric vehicle charging cable or assembly thereof is provided in the connector to cool heat generation of the pair of connector terminals 231 respectively connected to the conductor in addition to heat generation of the conductor 11 of the power unit 10. This is because the connection part of the conductor of the cable and the terminal of the connector and the terminal of the connector are also heat-generating parts.

Therefore, the cooling fluid supplied through the cooling tube 17 of the pair of power units constituting the electric vehicle charging cable according to the present invention is collected inside the electric vehicle connector to cool the terminals of the electric vehicle connector, and then the recovery unit It may be configured to be recovered by the recovery tube 27 constituting (20).

Accordingly, a closing pipe 221 for closing the cooling passage inside the cooling tube 17 of each power unit 10 and the interior of the chamber housing constituting the connector may be provided, respectively, and a pair of closing pipes ( 221) A collection pipe 223 having a branched structure to collect the internal cooling fluid into one, and a connection pipe 225 for transferring the cooling fluid collected in the collection pipe 223 to the chamber housing 227 can do.

6 to 8, the closing pipe 221, the collection pipe 223, and the connecting pipe 225 are shown to be configured in the form of individual pipes of separate structures, but at least some of them are integrated. It can also be configured.

The connection pipe 225 may serve to connect the chamber housing 227 and the collection pipe 223.

Therefore, the cooling fluid supplied through the pair of cooling tubes 17 to perform cooling of the conductor is sequentially passed through the closing pipe 221, the collecting pipe 223, and the connecting pipe 225 to the chamber housing 227. ) Is supplied to the chamber housing 227, and after cooling the terminal 231 of the connector installed through the chamber housing 227, it can be recovered through the recovery unit 20 connected to the chamber housing 227, so that the electric vehicle according to the present invention The charging cable can provide cooling effects to the connector terminals in addition to the conductor of the cable.

When controlling the flow rate and temperature of the cooling fluid supplied through the power unit, the cooling fluid flowing into the chamber housing 227 may sufficiently cool the terminal of the connector in addition to the conductor of the power unit.

And, since there may be a variation in the cooling load of the electric vehicle charging cable 100 in the season or the frequency of use of the charger, it is a method of adjusting the temperature and flow rate of the supplied cooling fluid according to the temperature of the recovered cooling fluid. Optimal cooling effect can be obtained.

The front end of the terminal 231 of the connector is connected to the electric vehicle connector, and the rear end may be connected by inserting a conductor of the power unit.

That is, the closing pipe 221 allows the power unit to pass through to the front so that it is connected to the connector terminal, and the fluid flowing through the cooling tube of the power unit forms a flow path to flow into the chamber housing through the collection pipe and the connection pipe. I can.

The closing pipe 221 may be composed of a T-shaped pipe, and the power unit passes through the closing pipe in a straight line to the connector terminal direction, and the cooling fluid flowing through the cooling tube of the power unit changes the flow path by 90 degrees. The flow path may be changed to flow into the collection pipe 223.

Accordingly, a sealing member (not shown) for sealing the outer circumferential surface of the insulating layer surrounding the conductor and the inner circumferential surface of the cooling tube 17 may be provided inside the power unit 10 passing through the closing pipe 221. The closing pipe 221 is a closing pipe so that the cooling fluid can be supplied to the collection pipe 223 by changing a flow path through an opening (17h, see FIG. 8) formed in the cooling tube 17 of the power unit 10 The position of the opening 17h may be determined in consideration of the mounting position of the 221.

With this structure, as shown in FIG. 7, the cooling fluid flows to the opening 17h of the cooling tube in the longitudinal direction of the conductor, and then the closing pipe 221, the collecting pipe 223, and the connecting pipe ( The cooling fluid flowing into the chamber housing 227 through 225 and flowing into the chamber housing 227 may cool a terminal mounting portion equipped with a connector terminal, which will be described later, and be recovered through the recovery unit 20.

In the power unit, a cooling tube excluding a cooling fluid and a conductor provided with an insulating layer accommodated in the cooling tube may pass through the closing tube 221 to be connected to the second terminal portion of the connector terminal.

As described above, the second terminal portion at the rear of the connector terminal 231 is inserted and mounted into the space between the cooling tube 17 where the cooling fluid of the power unit flows and the insulating layer surrounding the conductor, and the conductor has an insulating layer. A clamp member for clamping and fixing the outer circumferential surface of the cooling tube in which the conductor and the connector terminal is inserted by being removed from the rear of the hollow second terminal unit and inserted into the second terminal unit ( 233) and the like may be further provided.

In addition, by the connector connection structure shown in FIG. 7, according to the electric vehicle charging cable assembly according to the present invention, the cooling fluid is not immediately recovered from the connection part between the power unit and the connector, but forms a bypass flow path to cool down to the terminal of the connector. As a result, it is possible to obtain an effect of cooling the conductor of the cable and the terminal of the connector, so that the reliability and safety of the equipment can be improved. Hereinafter, a structure of a chamber housing and a connector terminal constituting a connector for charging an electric vehicle will be described.

9 and 10 are perspective views showing an assembled state and an exploded state of a connector terminal 231 constituting an electric vehicle charging cable assembly according to the present invention and a chamber housing 227 in which the connector terminal 231 is mounted.

The electric vehicle charging cable assembly according to the present invention includes a pair of connector terminals 231 each connected to a conductor of the power unit and constituting the electric vehicle connector; And the connector terminal 231 is mounted, the power unit and the recovery unit are connected, and the cooling fluid passing through the power unit is collected and recovered to the recovery unit. A chamber housing 227 having a chamber space 227d (refer to FIGS. 13 and 14) as a cooling space in which a cooling fluid flows and performs a cooling function to cool the terminal mounting portion 227a on which the connector terminal is mounted; It can be configured to include.

The electric vehicle charging cable assembly according to the present invention cools the conductor constituting the power unit using the cooling fluid supplied from the electric vehicle charger, and at the same time collects the cooling fluid through the connector of the electric vehicle charger and collects the cooling fluid to the electric vehicle charger. It may be configured to cool the connector terminal 231 constituting the connector or the terminal mounting portion 227a on which the connector terminal is mounted.

In the connector terminal 231, the charging terminal of the electric vehicle is connected to the front, and the conductor of the power unit may be mounted to the rear.

The connector terminal 231 may be configured as a female terminal, and may be divided into a first terminal portion 231a in a region connected to the electric vehicle charging terminal and a second terminal portion 231b on which a conductor of the power unit is mounted.

In addition, as shown in FIG. 10, the first terminal portion 231a and the second terminal portion 231b may be dividedly configured to be assembled.

The first terminal portion 231a and the second terminal portion 231b are configured as pipe-shaped female terminals, and an outer diameter may be determined so that the second terminal portion 231b is inserted behind the first terminal portion 231a.

In this case, a locking protrusion 231bs for limiting an insertion depth may be provided on an outer circumferential surface of the second terminal part 231b.

Accordingly, in a state in which the first terminal portion 231a and the second terminal portion 231b are assembled, the connector terminal 231 may have a stepped structure whose diameter is reduced from the rear.

The connector terminal 231 having such a structure may be mounted on the terminal mounting portion 227a provided in the chamber housing 227.

11 and 12 show a front view and a side view of a chamber housing 227 constituting a cable assembly for charging an electric vehicle according to the present invention.

The chamber housing 227 includes a pair of terminal mounting portions 227a through which the connector terminals 231 are mounted, an inlet 227b through which the cooling fluid via the pair of power units is introduced, and the inlet 227b. An outlet 227c through which the cooling fluid introduced into the chamber is discharged through the chamber space may be provided, and the interior of the chamber housing may have a sealed structure.

A pair of the terminal mounting portions 227a are formed while passing through the chamber housing 227 in a spaced state, and as described above, in the inner space of the terminal mounting portion 227a corresponding to the stepped structure of the connector terminal 231 A locking step 227as to which the first terminal part 231a is locked may be provided. In addition, a pair of terminal mounting portions 227a may be provided horizontally and in parallel.

Accordingly, when the connector terminal 231 is mounted from the front to the rear of the chamber housing 227, if the mounting depth is limited, assembly may be completed.

It is preferable that the inner diameter of the terminal mounting portion 227a and the outer diameter of the connector terminal 231 have a tolerance adjusted to enable press-fitting mounting without a separate fastening member.

The terminal mounting portion 227a may be provided with a mounting space 227ah in the form of a through hole through which the front and the rear of the connector terminals can be mounted.

In addition, the inlet 227b through which the cooling fluid cooled by the conductor of the power unit is introduced through the power unit and the outlet 227c through which the cooling fluid recovered by the electric vehicle charger is discharged after cooling the connector terminal 231 are the terminals. It may be provided above and below the mounting portion 227a, respectively.

According to the arrangement shape of the terminal mounting portion 227a, the inlet port 227b, or the outlet port, the cross-sectional shape of the chamber housing 227 in the front direction (a direction perpendicular to the connection direction of the power unit and the recovery unit) is rounded. Can be configured.

In the embodiment shown in FIGS. 11 and 12, the inlet 227b is provided above the conductor mounting portion so that the introduced cooling fluid falls by its own weight in addition to the pressure of the fluid and flows in the chamber housing 227. The outlet 227c may be provided under the terminal mounting portion 227a.

As shown in FIG. 12, the inlet 227b of the chamber housing 227 is provided in the chamber housing 227 in a diagonal direction, and the connection pipe is bent in correspondence with the angle of the inlet 227b (FIG. 7 And see FIG. 8).

The connection pipe connected to the inlet 227b may be connected to the above-described collection pipe in a horizontal direction, but in order to prevent the chamber housing 227 from increasing in size, the chamber housing 227 is configured to have a required size, but the inlet 227b ) May be formed to be inclined in a diagonal direction and then connected with a bent pipe in a bent shape may be applied.

Of course, depending on the shape of the chamber housing 227 or the position where the inlet is to be formed, the inlet 227b may be formed in a horizontal direction without being inclined, and accordingly, the connection pipe may also be configured in a non-bent shape.

In addition, as described above, the outlet 227c provided horizontally at the rear of the chamber housing 227 may be directly connected to the recovery unit.

13 and 14 are cross-sectional views of embodiments for explaining the flow of cooling fluid in the chamber housing 227 constituting the electric vehicle charging cable assembly according to the present invention.

The cooling fluid that has cooled the heat generated by the conductor of the power unit through the cooling tube of the power unit may be introduced into the chamber housing 227 through the collection pipe and the connection pipe, and into the chamber housing 227. The introduced cooling fluid is not immediately discharged to the outlet 227c in order to cool the heat of the connector terminal 231, and the connector terminal 231 is mounted in the chamber space 227d in the chamber housing 227 ( A structure that is discharged after cooling the outer peripheral surface of 227a) can be applied.

The pair of terminal mounting portions 227a are disposed in a state spaced apart so that a separation portion 227sc is formed therebetween in the chamber space 227d of the chamber housing 227, and the pair of terminal mounting portions 227a ) Is spaced apart from the inner surface of the chamber space of the chamber housing 227 to form a pair of bypass portions 227ss for bypassing a part of the cooling fluid, respectively, and the inlet 227b and the outlet 227c have one A spacer 227sc formed between the pair of terminal mounting portions may be interposed therebetween.

Accordingly, the pair of terminal mounting portions 227a may have a structure in which the outer circumferential surfaces 227af of the chamber housing 227 are exposed into the chamber space 227d in all directions.

In addition, the pair of terminal mounting portions 227a may be formed in the form of a pair of pipes spaced apart in the chamber space 227d to form a spaced portion 227sc therebetween, and the chamber space It is also possible to configure a bypass portion 227ss that is spaced apart from the inner peripheral surface of (227d) to bypass the cooling fluid.

Specifically, a pair of the terminal mounting portions 227a are arranged in the form of a pair of spaced pipes that connect and cross the front and rear of the chamber space in the inner chamber space of the chamber housing 227 to be spaced apart therebetween. A portion 227sc is formed, and the inner chamber space inner surface of the chamber housing and the pair of terminal mounting portions 227a are spaced apart from each other to form a pair of bypass portions 227ss for bypassing the cooling fluid, and the The inlet 227b and the outlet 227c may be provided at the rear of the chamber housing 227 with the spacer 227sc interposed therebetween.

Therefore, the cooling fluid introduced into the inlet 227b is distributed and flows through the separation portion 227sc and the bypass portion 227ss, and after cooling the entire outer peripheral surface 227af of the terminal mounting portion, the outlet 227c ), the cooling fluid can effectively cool the heat generated by the connector terminal, which is conducted through the terminal mounting portion 227a in the chamber space.

That is, as shown in FIG. 13, the pair of terminal mounting portions 227a are formed through and spaced apart in a direction perpendicular to the mounting direction of the connector terminal in the chamber space 227d of the chamber housing 227, Since the inlet 227b and the outlet 227c have a structure provided in the upper and lower portions of the spacer 227sc formed between the pair of terminal mounting portions 227a, cooling introduced from the inlet 227b Part of the fluid flows to the separation part 227sc, and the remaining cooling fluid flows to the bypass part 227ss that bypasses the circumference of the terminal mounting part 227a to cool the outer peripheral surface 227af of the terminal mounting part in the direction of 360 degrees. After that, it may be discharged through the discharge port 227c.

The chamber housing 227 is a cooling fluid so that the cooling fluid flowing into the inlet 227b is discharged through bypassing the bypass portion 227ss between the terminal mounting portion 227a and the inner peripheral surface of the chamber housing in addition to the spacing portion 227sc. Cooling performance can be improved by inducing the flow of the connector terminal 231 to evenly cool the outer circumferential surface 227af of the terminal mounting portion 227a through which heat generated from the connector terminal 231 conducts the most.

And the amount of the cooling fluid divided into the inlet 227b, the separation part 227sc, and the bypass part 227ss among the cooling fluid introduced from the inlet also affects the ratio of the area of the inlet port and the area of the outlet port. It was confirmed to receive, and an experiment as shown in Table 1 below was performed.

Table 1 below is a test result of testing the cooling performance through temperature change of the connector terminal when a chamber housing with a different outlet area is applied to the inlet of the same area. 227b) This is the test result to determine the ratio of the area.

In the test below, 100% ethylene glycol was used as the cooling fluid type, the hourly flow rate of the cooling fluid supplied to the chamber housing of the cooling fluid was 0.1 L/sec, and the inlet temperature of the cooling fluid to the chamber housing was about -7.3 degrees Celsius. , The outer diameter of the first terminal portion of the connector terminal mounted on the terminal mounting portion of each chamber housing is 12 mm.

If the area of the inlet 227b and the outlet 227c are different, the inlet flow rate of the fluid per cooling time through the inlet 227b and the discharge flow rate per hour through the outlet 227c are the same, but the inlet 227b and the outlet 227c ), the flow rate of the cooling fluid may be different.

Here, when the area of the inlet port 227b is larger than the area of the outlet port 227c, the effect of generating an instantaneous flow path resistance in the chamber housing 227 occurs, and the cooling fluid in the chamber by this flow resistance The experiment was conducted under the assumption that the flow path through which the cooling fluid flows by distributed flow to the bypass portion can be diversified.

In this case, since the flow rate of the cooling fluid flowing into the inlet port is set to be the same, the flow rate per hour of the inlet port 227b and the outlet port 227c may be the same, but the flow rate of the outlet port 227c will be inversely proportional to the area ratio. I can.

Therefore, through the test result as described above, the terminal mounting portion 227a formed through the interior of the chamber housing 227 has the outer peripheral surfaces 227af being spaced apart from each other in the chamber space 227d to form the spaced portion 227sc. And, each terminal mounting portion 227a is spaced apart from the inner surface of the chamber housing 227 to form a bypass portion 227ss, and the area of the inlet port 227b is 3.8 times that of the outlet port 227c. In the case of Example 2, which is 1.2 times the temperature of the connector terminal under the same conditions, the temperature of the connector terminal was measured at 86.33°C and 83.84°C, respectively, and the area ratio was greater than 4 or less than 1 and the temperature of the connector terminal compared to Comparative Example 1 and Comparative Example 2. It can be seen that the cooling performance of about 2°C to 5°C is more excellent.

Although not described in Table 1, when the area of the inlet port 227b is 1 to 4 times the area of the outlet port 227c through an additional test including the above test result, it is cooled by a divided flow of the cooling fluid. It was confirmed that a meaningful effect of reducing the temperature of the connector terminal by the performance can be obtained, and furthermore, in order to reduce the temperature deviation of the connector terminal while generating a meaningful cooling effect, the area of the inlet port 227b is the area of the outlet port 227c. It was additionally confirmed that the range of 1 to 3 times should be satisfied.

And, when the area of the outlet 227c is smaller than the area of the inlet 227b, and the area of the inlet 227b is configured to have a size of about 1 to 4 times the area of the outlet 227c, the A part of the cooling fluid flowing into the chamber housing 227 is immediately discharged due to the flow resistance due to the area of the discharge port 227c, but the other part passes through a bypass part bypassing the circumference of the terminal mounting part 227a in the chamber housing 227. Thus, it can be understood that the cooling effect is excellent because the terminal mounting portion 227a is evenly cooled and then discharged to the outlet 227c.

And, as in the case where the inlet/outlet area ratio is 0.8 as in Comparative Example 2, when the area of the outlet 227c is larger than the area of the inlet 227b, the cooling fluid flowing into the chamber housing 227 is different flow resistance. It is mostly discharged through the outlet 227c without the fact that the temperature of the connector terminal is measured to be 88.14 degrees Celsius, which is higher than in Examples 1 and 2, so that it can be confirmed that the cooling performance is relatively low, and in this case, the cooling fluid flowing through the inlet is It can be guessed that the distributed flow to the bypass portion 227ss was not large, and Comparative Example 2 (0.8) and Example 2 (1.2) in which the inlet/outlet area ratio is 1 as a boundary, although the difference in the area ratio is not large. And it was confirmed that the difference in the connector temperature was large, and the split flow of the cooling fluid contributed significantly to the cooling performance.

In addition, in the above test, as in Comparative Example 1, this corresponds to the case where the inlet/outlet area ratio is greater than 4 (4.4).In this case, the flow rate of the cooling fluid newly introduced from the inlet is decreased due to excessive flow resistance. As it was not smooth, the temperature of the connector terminal was measured at the highest of 88.63 degrees Celsius, and it was confirmed that the cooling performance was the lowest among Examples and Comparative Examples.

In this case, it was confirmed that in addition to deterioration of cooling performance, an excessive load may occur on the pump for circulation of the cooling fluid in the electric vehicle charger, or a problem of rupture of a connection part of a pipe may occur.

11 to 14, when the inlet 227b and the outlet 227c are formed in a circular shape, the inner diameter of the inlet 227b is about 1 to 2 times the inner diameter of the outlet 227c It means that it can be configured to a degree.

In this case, when the outer diameter of the first terminal portion of the connector terminal is 12 mm, the inner diameter of the inlet 227b may be configured to be about 6 mm to 10 mm, and the inner diameter of the outlet 227c may satisfy the above relationship. Can be configured.

Further, the shape of the inlet port and the outlet port is not limited to a circular shape, and may be configured in various shapes such as an elliptical shape or a polygonal shape.

As a result of the experiment through the assembly to which the electric vehicle charging cable shown in Table 1 was applied, a maximum of 400A class high-speed charging was performed in a charger in a room temperature environment, and the cooling fluid was recovered through the recovery tube 27 constituting the recovery unit 20 to recover the electric vehicle. According to the results of measuring the temperature of the cooling fluid recovered from the charger, even if the outer jacket 70 of the electric vehicle charging cable comes into contact with the body, it was confirmed to the extent that the feeling of discomfort or anxiety is not great.

In addition, a spacer that generates turbulence in the cooling fluid is interposed to supply cooling fluid by separately providing a power unit that can prevent heat concentration due to contact between the cooling tube and the insulator surrounding the conductor, and a dedicated recovery unit for recovering the cooling fluid. We came to the conclusion that sufficient cooling performance can be secured by this method.

In this way, as a method of determining the area ratio between the inlet and the outlet, the cooling fluid used for cooling the conductor of the power unit once again encloses the entire terminal mounting portion 227a on which the connector terminal 231 is mounted and is utilized for cooling. It can improve the cooling performance of the connector.

For the same reason, the inner diameter d1 of the inlet 227b is greater than the width w of the spacing part 227sc in order for the introduced cooling fluid to wrap around the terminal mounting portion 227a and cool the terminal mounting portion 227a. It can be largely configured.

The width (w) of the spacing part 227sc refers to the space between the terminal mounting parts 227a provided in the chamber housing 227, and the width of the spacing part 227sc between the terminal mounting parts 227a ( If w) is reduced, the flow rate of the cooling fluid bypassing the terminal mounting portion 227a may be further increased, so the inner diameter of the inlet 227b and the outlet 227c, the flow rate of the cooling fluid per hour, and the connector terminal 231 It is preferable to optimize the width of the spaced portion 227sc in consideration of temperature and the like.

In addition, the terminal mounting portion 227a may be configured in the form of a pipe crossing the chamber housing 227, as shown in FIG. 14, the terminal mounting portion 227a on the outer peripheral surface of at least one of the At least one protruding blade 227e may be provided to form turbulent flow of the cooling fluid passing through the spaced portion 227sc.

In the embodiment shown in FIG. 14, of the pair of terminal mounting portions 227a, the terminal mounting portion 227a on the left has two blades 227e protruding, and the terminal mounting portion 227a on the right has one blade 227e. Is provided with a protrusion to generate turbulence by bending the flow path of the cooling fluid flowing through the spaced portion 227sc between the terminal mounting portions 227a, and the heat exchange efficiency between the cooling fluid and the terminal mounting portion 227a by the generated turbulence. Can improve.

In the embodiment shown in FIG. 14, the blade is shown to be configured in the form of a protruding partition wall on the outer circumferential surface of the terminal mounting portion 227a. However, if the blade has a structure capable of increasing heat exchange efficiency by forming turbulence during the flow of cooling fluid, There is no limit to the shape.

In addition, the blade shown in FIG. 14 is shown to extend in a vertical direction with respect to an imaginary line connecting the inlet and the outlet, but if necessary, the end of the blade may be configured to be inclined in the inlet direction or inclined in the outlet direction. have.

In the former case, it corresponds to a case where the flow path resistance becomes larger, and in the case of the latter, the opposite effect is obtained. That is, it was confirmed that the inclination angle of the blade can be applied to the case where it is difficult to control the area ratio of the inlet and the outlet to improve the cooling condition.

Although the present specification has been described with reference to preferred embodiments of the present invention, those skilled in the art will variously modify and change the present invention within the scope not departing from the spirit and scope of the present invention described in the claims described below. You will be able to do it. Therefore, if the modified implementation basically includes the elements of the claims of the present invention, it should be seen that all are included in the technical scope of the present invention.

Claims

In the electric vehicle charging cable assembly connecting the electric vehicle connector and the electric vehicle charger,

Conductor; An insulating layer surrounding the conductor; And a pair of power units having a cooling tube surrounding the outside of the insulating layer.

A recovery unit for recovering the cooling fluid supplied through the cooling tubes of the pair of power units;

A pair of connector terminals each connected to a conductor of the power unit and constituting the electric vehicle connector; And

The connector terminal is mounted, the power unit and the recovery unit are connected, and a chamber space is provided for cooling the connector terminal in the process of flowing a cooling fluid through the cooling passage of the power unit and recovered to the recovery unit. A cable assembly for charging an electric vehicle including a chamber housing.
The method of claim 1,

The chamber housing includes a pair of terminal mounting portions through which the connector terminals are mounted, an inlet through which the cooling fluid through the pair of power units is introduced, and an outlet through which the cooling fluid introduced into the inlet is discharged through the chamber space. Electric vehicle charging cable assembly, characterized in that provided.
The method of claim 2,

The pair of terminal mounting portions are arranged in the form of a pair of spaced pipes that connect and cross the front and rear of the chamber space in the inner chamber space of the chamber housing, and a spacer is formed therebetween, and the interior of the chamber housing The inner surface of the chamber space and the pair of terminal mounting portions are spaced apart from each other to form a pair of bypass portions for bypassing the cooling fluid,

The electric vehicle charging cable assembly, characterized in that the inlet and the outlet are provided at the rear of the chamber housing with the spaced portion therebetween.
The method of claim 3,

The cooling fluid introduced into the inlet port is distributed to and flows through the separation part and the bypass part, wraps around the outer peripheral surface of the terminal mounting part exposed in the chamber space, and cools it, and then discharged through the discharge port. assembly.
The method of claim 3,

The inlet is provided in the upper chamber housing, and the outlet is provided in the chamber housing lower portion of the electric vehicle charging cable assembly.
The method of claim 3,

A cable assembly for charging an electric vehicle, characterized in that the cooling fluid introduced from the inlet is discharged to the outlet through the spaced portion and around the terminal mounting portion.
The method of claim 3,

The pair of terminal mounting portions are configured in the form of pipes crossing each of the chamber spaces inside the chamber housing, and at least one blade protruding from the outer circumferential surface of at least one of the pair of terminal mounting portions exposed to the inner space of the chamber housing Electric vehicle charging cable assembly, characterized in that provided.
The method of claim 2,

The electric vehicle charging cable assembly, characterized in that the area of the inlet port is 1 to 4 times the area of the outlet port.
The method of claim 3,

Electric vehicle charging cable assembly, characterized in that the inner diameter of the inlet is greater than the width of the spacer.
The method of claim 3,

The electric vehicle charging cable assembly, characterized in that the cross-sectional shape of the chamber housing in a direction perpendicular to the connection direction of the power unit and the recovery unit has a rounded corner.
The method of claim 2,

A cable assembly for charging an electric vehicle, further comprising a branched collecting pipe connected to each of the cooling tubes of the pair of power units, and a connecting pipe connecting the collecting pipe and the inlet of the chamber housing.
The method of claim 11,

Electric vehicle, characterized in that it further comprises a closing pipe to allow the cooling fluid flowing through the cooling tube of each power unit to be connected to the collection pipe, wherein the collection pipe is connected to the closing pipe mounted at the end of each power unit Cable assembly for charging.
The method of claim 12,

The electric vehicle charging cable assembly, characterized in that the conductor covered with the insulating layer of each power unit passes through the closing tube and is connected to the rear of the connector terminal.
The method of claim 11,

The inlet of the chamber housing is provided in a diagonal direction in the chamber housing, and the connection pipe is a cable assembly for charging an electric vehicle, characterized in that it is formed in a curved shape corresponding to the angle of the inlet.
The method of claim 2,

An electric vehicle charging cable assembly, characterized in that the outlet of the chamber housing is directly connected to the recovery unit.
The method of claim 1,

The electric vehicle charging cable assembly, characterized in that the insulating layer of the power unit tightly surrounds the conductor so that the conductor is not exposed to a cooling fluid.
The method of claim 1,

The power unit further comprises a spacer for preventing contact between the insulating layer and the cooling tube and forming a cooling passage through which a cooling fluid flows.
The method of claim 17,

The electric vehicle charging cable assembly, characterized in that the spacer of the power unit is configured in the form of a wire.
The method of claim 18,

The spacer is a cable assembly for charging an electric vehicle, characterized in that the spacer is disposed in a spiral shape between the insulating layer and the cooling tube of the power unit.
The method of claim 1,

The spacer is at least one protrusion integrally formed on an outer surface of the insulating layer or an inner surface of the cooling tube of the conductor.
The method of claim 1,

And at least one grounding unit and at least one communication unit together with the power unit.
The method of claim 17,

At least one of the cooling tube and the spacer is made of a Teflon-based or urethane material.