Connector device for quickly charging electric vehicle with improved charging efficiency

Abstract

A connector device for quickly charging an electric vehicle according to exemplary embodiments of the present invention comprises: a power supply line for supplying power; a refrigerant supply line for introducing a refrigerant; a refrigerant recovery line for recovering the introduced refrigerant; a connector unit that is coupled to each of the refrigerant supply line and the refrigerant recovery line, and can be connected to a charging terminal of the electric vehicle in order to supply power to the electric vehicle; and a refrigerant bypass line which is provided inside the connector unit and to which one of the two ends of the refrigerant supply line and one of the two ends of the refrigerant recovery line are connected. At least a portion of the refrigerant bypass line may be provided with a short-circuit prevention unit provided to maintain an insulating function even in a cryogenic state imparted by the refrigerant, and thus the charging efficiency of the connector device for quickly charging the electric vehicle may be significantly improved.

Description

Connector device for rapid charging of electric vehicles with improved charging efficiency

[0001] The present invention relates to a connector device for rapid charging of an electric vehicle, in which charging efficiency is improved by a short-circuit prevention unit provided in at least a portion of a refrigerant fuel line.

[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, rapid chargers for rapid charging have an output voltage range of 50 to 450 V DC and an output current of up to 110 A. Charging an electric vehicle using these chargers takes only 20 to 30 minutes. The output current of these chargers is expected to increase depending on the battery capacity and charging technology of the electric vehicle.

[0003] These rapid chargers have an electric vehicle charging cable connected to the main body, a charger connector mounted on the end of the charging cable, and the charger connector mounted on the electric vehicle connector installed in the electric vehicle to supply electricity from the electric vehicle charger to the electric vehicle.

[0004] Since these rapid chargers have output currents exceeding 100A, heat generation in the EV charging cables that transmit this current to the EV can be a problem. Minimizing the heat generated by EV charging cables involves increasing the conductor diameter, but this approach is difficult to fully reduce heat generation and increases the weight of the EV charging cables.

[0005] Heat generated by electric vehicle charging cables can increase the risk of fire. Furthermore, the charging cable may come into contact with the user's body when attaching the charger connector to the electric vehicle connector or detaching it from the electric vehicle connector and placing it on the charger. Excessive heat generation from the charging cable can cause injury, discomfort, or anxiety, making it undesirable.

[0006] The cooling methods for electric vehicle charging cables include air-cooling systems that cool the cables using air, and liquid-cooling systems that cool the cables using liquid (mainly water or coolant).

[0007] Air-cooled cooling systems are suitable for use in general environments and have the advantages of being relatively inexpensive and having a simple structure, but have the disadvantage of low cooling efficiency when handling very high power.

[0008] Liquid cooling systems are mainly used in situations requiring high current, such as fast charging, but have the disadvantages of high system complexity and maintenance requirements.

[0009] In addition, conventional liquid cooling systems have the risk of coolant leakage, etc. If the leaked coolant comes into contact with the conductive parts of electrical components or cables, it can cause a short circuit, electric shock, or equipment damage, which can lead to serious safety issues.

[0010] One of the various tasks of the present invention is to provide a connector device for rapid charging of electric vehicles with improved charging efficiency by providing a short-circuit prevention section that maintains an insulation function even at extremely low temperatures in a refrigerant fuel line.

[0011] According to exemplary embodiments of the present invention, a connector device for rapid charging of an electric vehicle with improved charging efficiency includes a power supply line for supplying power, a refrigerant supply line for introducing refrigerant, a refrigerant recovery line for recovering the introduced refrigerant, a connector portion connected to each of the refrigerant supply line and the refrigerant recovery line and provided so as to be connectable to a charging terminal of the electric vehicle for supplying power to the electric vehicle, and a refrigerant route line provided inside the connector portion and connecting one of both ends of the refrigerant supply line to one of both ends of the refrigerant recovery line, and at least a portion of the refrigerant route line may be provided with a short-circuit prevention portion configured to maintain an insulating function even in an extremely low temperature state provided by the refrigerant.

[0012] The above short-circuit prevention part may include at least one selected from the group consisting of PFA (perfluoroalkoxy), FEP (fluorinated ethylene), PTFE (Poly Tetra Fluoro Ethylene), PEEK (Polyether Ether Ketone), high-heat resistant plastic, nylon, silicone, and urethane.

[0013] The above power supply line may be provided with a refrigerant flow line having a hollow structure in which the refrigerant can flow.

[0014] The above power supply line is composed of a first power supply line for supplying positive (+) power and a second power supply line for supplying negative (-) power, and the refrigerant flow line can be formed at the center of each of the first power supply line and the second power supply line.

[0015] The refrigerant flow line built into the first power supply line can perform the function of either the refrigerant supply line or the refrigerant recovery line, and the refrigerant flow line built into the second power supply line can perform the function of the other one of the refrigerant supply line and the refrigerant recovery line.

[0016] The connector portion may include a connector case forming an exterior, a power supply line connection portion coupled to one side of the connector case and to which the power supply line is connected, and a DC terminal coupled to the other side opposite to one side of the connector case and for transmitting power supplied from the power supply line to the electric vehicle.

[0017] The above power supply line connection part and the DC terminal can be formed integrally.

[0018] The above power supply line connection portion is composed of a first power supply line connection portion connected to the first power supply line, and a second power supply line connection portion connected to the second power supply line, and the refrigerant oil line may have a structure that connects the first power supply line connection portion and the second power supply line connection portion.

[0019] The above refrigerant flow line includes a first refrigerant flow line formed in the internal space of the first power supply line connection portion, a second refrigerant flow line formed in the internal space of the second power supply line connection portion, and a third refrigerant flow line formed in the internal space of the connector case, and the refrigerant supplied from the refrigerant supply line can be controlled to flow sequentially through the first refrigerant flow line, the third refrigerant flow line, and the second refrigerant flow line in that order and be recovered by the refrigerant recovery line.

[0020] The above short-circuit prevention unit may be placed on the third refrigerant oil line.

[0021] Each feature of the above-described embodiments may be implemented in combination in other embodiments as long as it is not inconsistent with or exclusive of other embodiments.

[0022] A connector device for rapid charging of an electric vehicle according to exemplary embodiments of the present invention has a hollow structure in which a coolant can flow inside a power supply line, and a coolant flow line is built into the hollow structure formed inside the power supply line to effectively cool the power supply line.

[0023] The connector device for rapid charging of electric vehicles according to exemplary embodiments of the present invention is provided with a short circuit prevention unit that maintains an insulation function even in an extremely low temperature state in a refrigerant gas line, thereby preventing a short circuit due to refrigerant leakage, and thus the charging efficiency of the connector device can be greatly improved.

[0024] The effects of the present invention are not limited to those described above, and other effects not mentioned will be clearly recognized by those skilled in the art from the description below.

[0025] FIG. 1 is a drawing for explaining a connector device for rapid charging of an electric vehicle according to exemplary embodiments of the present invention.

[0026] Figure 2 is a side view of Figure 1.

[0027] FIG. 3 is a drawing for explaining a power supply line of a connector device for rapid charging of an electric vehicle according to exemplary embodiments of the present invention.

[0028] FIG. 4 is a drawing for explaining a refrigerant flow line and a short-circuit prevention unit of a connector device for rapid charging of an electric vehicle according to exemplary embodiments of the present invention.

[0029] FIG. 5 is a cross-sectional view of a connector portion of a connector device for rapid charging of an electric vehicle according to exemplary embodiments of the present invention.

[0030] FIG. 6 is a drawing showing the flow of refrigerant in a connector device for rapid charging of an electric vehicle according to exemplary embodiments of the present invention.

[0031] Figure 7 is a plan view of Figure 6.

[0032] Hereinafter, specific embodiments of the present invention will be described with reference to the drawings. The following detailed description is provided to facilitate a comprehensive understanding of the methods, devices, and / or systems described herein. However, these are merely examples and the present invention is not limited thereto.

[0033] In describing embodiments of the present invention, if a detailed description of a known technology related to the present invention is judged to unnecessarily obscure the gist of the present invention, the detailed description will be omitted. In addition, the terms described below are terms defined in consideration of their functions in the present invention, and this may vary depending on the intention or custom of the user or operator. Therefore, the definitions should be made based on the contents throughout this specification. The terminology used in the detailed description is only for the purpose of describing embodiments of the present invention and should not be limited in any way. Unless clearly used otherwise, the singular form includes the plural form. In this description, expressions such as "comprises" or "having" are intended to indicate certain features, numbers, steps, operations, elements, parts or combinations thereof, and should not be construed to exclude the presence or possibility of one or more other features, numbers, steps, operations, elements, parts or combinations thereof other than those described.

[0034] Additionally, in describing components of embodiments of the present invention, terms such as first, second, A, B, (a), (b), etc. may be used. These terms are only intended to distinguish the components from other components, and the nature, order, or sequence of the components are not limited by the terms.

[0035] Below, a connector device for rapid charging of an electric vehicle with improved charging efficiency is described in detail through drawings.

[0036] FIG. 1 is a drawing for explaining a connector device for rapid charging of an electric vehicle according to exemplary embodiments of the present invention, and FIG. 2 is a side view of FIG. 1.

[0037] Referring to FIGS. 1 and 2, a connector device (1) for rapid charging of an electric vehicle according to exemplary embodiments of the present invention may include a power supply line (10), a connector portion (40), and a terminal portion (50).

[0038] The power supply line (10) is provided to supply power and may have a hollow structure in which refrigerant can flow inside.

[0039] The power supply line (10) may include a first power supply line (10a) for supplying positive (+) power and a second power supply line (10b) for supplying negative (-) power. However, the present invention is not necessarily limited thereto, and the first power supply line (10a) may supply negative (-) power, and the second power supply line (10b) may supply positive (+) power.

[0040] The first power supply line (10a) and the second power supply line (10b) have the same size and shape, and can be divided into the first power supply line (10a) and the second power supply line (10b) depending on the type of power supplied.

[0041] The connector portion (40) may be provided so as to be connectable to the charging terminal of the electric vehicle to supply power to the electric vehicle. The connector portion (40) is connected to one end of the power supply line (10) so as to receive power from the power supply line (10) and transmit it to the electric vehicle.

[0042] The terminal portion (50) may be provided to be connected to the other end of the power supply line (10) and may include a valve (52) and a refrigerant flow pipe (54).

[0043] The valve (52) may include a first valve (52a) connected to the other end of the first power supply line (10a) and a second valve (52b) connected to the other end of the second power supply line (10b). However, the first valve (52a) and the second valve (52b) are provided to have the same size and shape, and may be distinguished according to the type of the power supply line (10) to which they are connected.

[0044] The valve (52) is connected to at least one of the refrigerant supply pipe (541) and the refrigerant recovery pipe (543) to control the flow rate and pressure of the refrigerant.

[0045] The refrigerant flow pipe (54) forms a path through which the refrigerant flows, and is connected to the first valve (52a) and the second valve (52b), respectively, to perform at least one of supplying and recovering the refrigerant. The refrigerant flow pipe (544) may include a refrigerant supply pipe (541) and a refrigerant recovery pipe (543).

[0046] The refrigerant supply pipe (541) can be connected to the first valve (52a). Accordingly, the refrigerant supply pipe (541) can supply refrigerant to a hollow structure formed inside the first power supply line (10a). That is, the refrigerant supply line (22), which will be described later, can be built into the inside of the first power supply line (10a).

[0047] The refrigerant recovery pipe (543) can be connected to the second valve (52b). Accordingly, the refrigerant recovery pipe (543) can recover the refrigerant flowing in the hollow structure formed inside the second power supply line (10b). That is, the refrigerant recovery line (24), which will be described later, can be built into the inside of the second power supply line (10b).

[0048] The flow of refrigerant and the refrigerant flow line (20) will be described in more detail with reference to FIGS. 4 to 7 below.

[0049] FIG. 3 is a drawing for explaining a power supply line of a connector device for rapid charging of an electric vehicle according to exemplary embodiments of the present invention.

[0050] Referring to FIG. 3, the power supply line (10) of the electric vehicle rapid charging connector device (1) according to exemplary embodiments of the present invention may be composed of a coil portion (101), a conductor portion (103), and a covering tube (105).

[0051] The power supply line (10) has a hollow structure in which refrigerant can flow inside, so that a refrigerant flow line (20) to be described later can be built in.

[0052] The power supply line (10) may be composed of a coil portion (101), a conductor portion (103), and a covering tube (105).

[0053] The coil portion (101) may be formed to have a hollow structure through which refrigerant can flow. That is, a refrigerant flow line (20), which will be described later, may be built into the coil portion (101).

[0054] As an example, the coil portion (101) may include at least one selected from the group consisting of CCA (Copper Clad Aluminum) and copper (Cu).

[0055] More specifically, the coil portion (101) may be composed of 50 to 90 wt% of CCA (Copper Clad Aluminum) and 10 to 50 wt% of copper (Copper, Cu), and preferably 80 wt% of CCA (Copper Clad Aluminum) and 20 wt% of copper (Copper, Cu).

[0056] The conductor portion (103) may be provided to surround the outer surface of the coil portion (101).

[0057] The conductor portion (103) may be a braided conductor in which a plurality of strands are braided to form a net shape. More specifically, the conductor portion (103) may be formed by twisting a plurality of the strands in the longitudinal direction.

[0058] As an example, the conductor portion (103) may be configured to include at least one selected from the group consisting of copper (Cu), aluminum (Al), and an aluminum (Al) alloy.

[0059] However, the present invention is not necessarily limited thereto, and it goes without saying that any material can be applied to the conductor (103) as long as it has very low resistance to electricity and can transmit electricity well.

[0060] The covering tube (105) can be formed to surround the outer surface of the conductor portion (103). The covering tube (105) can be manufactured from an insulating material that does not conduct electricity so as to be electrically isolated from the conductor portion (103).

[0061] As an example, the covering tube (105) may be configured to include at least one selected from the group consisting of PFA (Perfluoroalkoxy), FEP (Fluorinated Ethylene Propylene), PTFE (Poly Tetra Fluoro Ethylene), high heat-resistant plastic, nylon, silicone, and urethane.

[0062] However, the present invention is not necessarily limited thereto, and it goes without saying that any material can be applied to the covering tube (105) as long as it is an insulating material that is electrically separated from the conductor portion (103).

[0063] FIG. 4 is a drawing for explaining a refrigerant flow line and a short-circuit prevention part of a connector device for rapid charging of an electric vehicle according to exemplary embodiments of the present invention, and FIG. 5 is a drawing showing a cross-section of a connector part of a connector device for rapid charging of an electric vehicle according to exemplary embodiments of the present invention.

[0064] FIG. 6 is a drawing showing the flow of refrigerant in a connector device for rapid charging of an electric vehicle according to exemplary embodiments of the present invention, and FIG. 7 is a plan view of FIG. 6.

[0065] Referring to FIGS. 4 to 7, a connector portion (40) according to exemplary embodiments of the present invention may include a connector case (42) and a power transmission portion (44).

[0066] The connector case (42) can form the exterior of the connector portion (40), and a power transmission portion (44) can be provided inside.

[0067] A pair of power transmission units (44) may be provided inside the connector case (42). A pair of power transmission units (44) may be provided to have the same size and shape.

[0068] The power transmission unit (44) may be provided so that at least a portion thereof is located inside the connector case (42), and the remaining portion thereof is exposed to the outside of the connector case (42).

[0069] As an example, the power transmission unit (44) is formed of a conductor and can transmit power supplied from the power supply line (10) to the electric vehicle.

[0070] The power transmission unit (44) may include a power supply line connection unit (441) and a DC terminal (443). The power supply line connection unit (441) and the DC terminal (443) may be provided as an integrated unit.

[0071] The power supply line connection part (441) is connected to one side of the connector case (42), and the power supply line (10) can be connected.

[0072] The power supply line connection part (441) may be composed of a first power supply line connection part (441a) connected to the first power supply line (10a) and a second power supply line connection part (442b) connected to the second power supply line (10b). The first power supply line connection part (441a) and the second power supply line connection part (442b) are formed to have the same size and shape, and can be distinguished by the power supply line (10) to which they are connected. Therefore, in the following, the first power supply line connection part (441a) and the second power supply line connection part (441b) will be described without distinguishing between them.

[0073] As an example, the power supply line connection portion (441) can be connected to the power supply line (10) by having one end inserted into one side of the power supply line (10) by a predetermined length. More specifically, the power supply line connection portion (441) can be inserted between the conductive portion (103) and the covering tube (105) of the power supply line (10) by a predetermined length. Accordingly, the outer surface of the power supply line connection portion (441) comes into contact with the inner surface of the covering tube (105) by a predetermined area, and the inner surface of the power supply line connection portion (441) comes into contact with the outer surface of the conductive portion (103) by a predetermined area, so that the power supply line connection portion (441) and the power supply line (10) can be connected.

[0074] The power supply line connection part (441) is formed of a conductor, so that power can be supplied from the power supply line (10) when the inner surface of the power supply line connection part (441) comes into contact with the conductor part (103) over a predetermined area.

[0075] The power supply line (10) can be introduced into the inside of the power supply line connection part (441) so as to be positioned at a predetermined distance from the other side of the power supply line connection part (441).

[0076] That is, the power supply line (10) is positioned at a predetermined distance from the other end of the power supply line connection portion (441), and a predetermined space can be formed between the end of the power supply line (10) and the end of the power supply line connection portion (441).

[0077] The connector device (1) for rapid charging of an electric vehicle according to exemplary embodiments of the present invention further includes a refrigerant flow line (20), and the refrigerant flow line (20) can be formed as the refrigerant flows in a hollow structure formed inside the coil portion (101).

[0078] The refrigerant flow line (20) may include a refrigerant supply line (22), a refrigerant recovery line (24), and a refrigerant flow line (26).

[0079] The refrigerant supply line (22) is a line for introducing refrigerant, the refrigerant recovery line (24) is a line for recovering the introduced refrigerant, and the refrigerant route line (26) can connect one of the two ends of the refrigerant supply line (22) and one of the two ends of the refrigerant recovery line (24). That is, the refrigerant that has passed through the refrigerant supply line (22) can move to the refrigerant recovery line (24) via the refrigerant route line (26).

[0080] The refrigerant flow line (20) can be built into a hollow structure formed at least partially inside the power supply line (10), and the refrigerant flow line (20) can be built into the hollow structure formed inside the power supply line (10) to cool the power supply line (10) more effectively.

[0081] That is, at least a portion of the refrigerant flow line (20) can be formed by penetrating the center of each of the first power supply line (10a) and the second power supply line (10b).

[0082] As an example, the refrigerant flow line (20) built into the first power supply line (10a) may perform one of the functions of the refrigerant supply line (22) and the refrigerant recovery line (24), and the refrigerant flow line (20) built into the second power supply line (10b) may perform the other function of the refrigerant supply line (22) and the refrigerant recovery line (24). In the case of the present embodiment, an example is shown in which the refrigerant flow line (20) built into the first power supply line (10a) is a refrigerant supply line (22), and the refrigerant flow line (20) built into the second power supply line (10b) is a refrigerant recovery line (24).

[0083] However, the present invention is not necessarily limited thereto, and the refrigerant flow line (20) built into the first power supply line (10a) may be provided as a refrigerant recovery line (24), and the refrigerant flow line (20) built into the second power supply line (10b) may be provided as a refrigerant supply line (22).

[0084] The refrigerant oil line (26) may be provided inside the connector case (42). More specifically, the refrigerant oil line (26) may have a structure that connects the first power supply line connection portion (441a) and the second power supply line connection portion (441b).

[0085] The refrigerant flow line (26) may include a first refrigerant flow line (261) formed in the internal space of the first power supply line connection portion (441a), a second refrigerant flow line (263) formed in the internal space of the second power supply line connection portion (441b), and a third refrigerant flow line (265) formed in the internal space of the connector case (42).

[0086] The first refrigerant oil line (261) can be formed in an internal space formed between the end of the first power supply line (10a) and the other end of the first power supply line connection portion (441a) inside the first power supply line connection portion (441a).

[0087] The second refrigerant oil line (263) can be formed in an internal space formed between the end of the second power supply line (10b) and the other end of the second power supply line connection portion (441b) inside the second power supply line connection portion (441b).

[0088] The third refrigerant oil line (265) can be formed in an internal space formed between the first power supply line connection part (441a) and the second power supply line connection part (441b).

[0089] As an example, the refrigerant supplied from the refrigerant supply line (22) may flow sequentially through the first refrigerant flow line (261), the third refrigerant flow line (265), and the second refrigerant flow line (263) in that order and be recovered to the refrigerant recovery line (24).

[0090] Referring to FIGS. 6 and 7, the refrigerant supplied to the refrigerant supply line (22) through the refrigerant supply pipe (541) can flow through the refrigerant supply line (22) and then flow in the order of the first refrigerant flow line (261), the third refrigerant flow line (265), and the second refrigerant flow line (263). After flowing through the second refrigerant flow line (263), the refrigerant can be recovered through the refrigerant recovery line (24).

[0091] However, the present invention is not necessarily limited thereto, and when a refrigerant recovery line (24) is formed inside the first power supply line (10a) and a refrigerant supply line (22) is formed inside the second power supply line (10b), the refrigerant supplied from the refrigerant supply line (22) may sequentially flow in the order of the second refrigerant flow line (263), the third refrigerant flow line (265), and the first refrigerant flow line (261) and be recovered by the refrigerant recovery line (24).

[0092] Referring to FIGS. 4 to 7, the electric vehicle rapid charging connector device (1) according to exemplary embodiments of the present invention may further include a short-circuit prevention unit (30).

[0093] A short circuit prevention unit (30) is provided on at least a portion of the refrigerant flow line (26), so that the insulation function can be maintained even in an extremely low temperature state imposed by the refrigerant. More specifically, the short circuit prevention unit (30) can be placed on the third refrigerant flow line (265).

[0094] That is, the short-circuit prevention unit (30) is formed to have a hollow structure inside, and the third refrigerant oil line (265) can be built into the inside of the short-circuit prevention unit (30).

[0095] The short circuit prevention unit (30) is positioned on the third refrigerant flow line (265), thereby preventing a short circuit caused by refrigerant leaking to the outside of the connector case (42).

[0096] As an example, the short-circuit prevention unit (30) may include at least one selected from the group consisting of PFA (perfluoroalkoxy), FEP (fluorinated ethylene), PTFE (Poly Tetra Fluoro Ethylene), PEEK (Polyether Ether Ketone), high-heat resistant plastic, nylon, silicone, and urethane.

[0097] In particular, the above PEEK (Polyether Ether Ketone) is a semi-crystalline thermoplastic plastic with excellent chemical resistance and mechanical strength, low moisture absorption, strong fire resistance, and excellent dimensional stability over a wide temperature range.

[0098] Accordingly, the short-circuit prevention part (30) may necessarily include the PEEK (Polyether Ether Ketone). Since the short-circuit prevention part (30) includes the PEEK (Polyether Ether Ketone), it can maintain its insulating function even in the extremely low temperature state of the refrigerant.

[0099] The DC terminal (443) is connected to the opposite side of the connector case (42) and can transmit power supplied from the power supply line (10) to the electric vehicle. The DC terminal (443) can be provided to correspond to the charging terminal of the electric vehicle so that it can be inserted into the charging terminal of the electric vehicle.

[0100] The DC terminal (443) can be formed integrally with the power supply line connection part (441).

[0101] That is, the DC terminal (443) may include a first DC terminal (443a) formed integrally with the first power supply line connection portion (441a) and a second DC terminal (443b) formed integrally with the second power supply line connection portion (441b).

[0102] The first DC terminal (443a) can receive power from the first power supply line connection part (441a), and the second DC terminal (443b) can receive power from the second power supply line connection part (441b).

[0103] Referring to FIGS. 1 to 7, the connector device (1) for rapid charging of an electric vehicle according to exemplary embodiments of the present invention has a hollow structure in which a coolant can flow inside a power supply line (10), and a coolant flow line (20) is built into the hollow structure formed inside the power supply line (10), thereby increasing the contact area between the power supply line (10) and the coolant, so that the power supply line (10) can be effectively cooled.

[0104] According to exemplary embodiments of the present invention, a connector device (1) for rapid charging of an electric vehicle is provided with a short circuit prevention unit (30) that maintains an insulation function even in an extremely low temperature state in a refrigerant oil line (26), thereby preventing a short circuit due to refrigerant leakage, and thus the charging efficiency of the connector device (1) for rapid charging of an electric vehicle can be greatly improved.

[0105] As an example, the short-circuit prevention unit (30) may include at least one selected from the group consisting of PFA (perfluoroalkoxy), FEP (fluorinated ethylene), PTFE (Poly Tetra Fluoro Ethylene), PEEK (Polyether Ether Ketone), high-heat resistant plastic, nylon, silicone, and urethane.

[0106] While various embodiments of the present invention have been described in detail above, those skilled in the art will appreciate that various modifications to the above-described embodiments are possible without departing from the scope of the present invention. Therefore, the scope of the present invention should not be limited to the described embodiments, but should be defined not only by the claims set forth below but also by equivalents thereof.

Claims

1. Power supply line for supplying power; Refrigerant supply line for introducing refrigerant; A refrigerant recovery line for recovering the introduced refrigerant; A connector part which is connected to the refrigerant supply line and the refrigerant recovery line, respectively, and is provided so as to be connected to the charging terminal of the electric vehicle to supply power to the electric vehicle; and A refrigerant route line is provided inside the connector section and is connected to one of the ends of the refrigerant supply line and one of the ends of the refrigerant recovery line; A connector device for rapid charging of an electric vehicle with improved charging efficiency, characterized in that at least a portion of the refrigerant-based line is provided with a short-circuit prevention unit designed to maintain an insulating function even in an extremely low temperature state imparted by the refrigerant.

2. In paragraph 1, A connector device for rapid charging of an electric vehicle with improved charging efficiency, characterized in that the short-circuit prevention part includes at least one selected from the group consisting of PFA (perfluoroalkoxy), FEP (fluorinated ethylene), PTFE (Poly Tetra Fluoro Ethylene), PEEK (Polyether Ether Ketone), high heat-resistant plastic, nylon, silicone, and urethane.

3. In paragraph 1, A connector device for rapid charging of an electric vehicle with improved charging efficiency, characterized in that the power supply line is provided with a refrigerant flow line having a hollow structure in which the refrigerant can flow inside.

4. In paragraph 3, The above power supply line is composed of a first power supply line for supplying positive (+) power and a second power supply line for supplying negative (-) power. A connector device for rapid charging of an electric vehicle with improved charging efficiency, characterized in that the refrigerant flow line is formed at the center of each of the first power supply line and the second power supply line.

5. In paragraph 4, The refrigerant flow line built into the first power supply line performs the function of either the refrigerant supply line or the refrigerant recovery line, A connector device for rapid charging of an electric vehicle with improved charging efficiency, characterized in that the refrigerant flow line built into the second power supply line performs the function of the remaining one of the refrigerant supply line and the refrigerant recovery line.

6. In paragraph 5, The above connector part, Connector case forming the exterior; A power supply line connection portion coupled to one side of the connector case and to which the power supply line is connected; and A connector device for rapid charging of an electric vehicle with improved charging efficiency, characterized in that it includes a DC terminal coupled to the opposite side of the connector case and for transmitting power supplied from the power supply line to the electric vehicle.

7. In paragraph 6, A connector device for rapid charging of an electric vehicle with improved charging efficiency, characterized in that the power supply line connection portion and the DC terminal are formed integrally.

8. In paragraph 6, The above power supply line connection part is composed of a first power supply line connection part connected to the first power supply line, and a second power supply line connection part connected to the second power supply line, A connector device for rapid charging of an electric vehicle with improved charging efficiency, characterized in that the refrigerant oil line has a structure that connects the first power supply line connection portion and the second power supply line connection portion.

9. In paragraph 8, The above refrigerant oil line is, A first refrigerant oil line formed in the internal space of the first power supply line connection portion; A second refrigerant oil line formed in the internal space of the second power supply line connection portion; and A third refrigerant oil line formed in the internal space of the above connector case; A connector device for rapid charging of an electric vehicle with improved charging efficiency, characterized in that the refrigerant supplied from the refrigerant supply line is controlled to flow sequentially through the first refrigerant flow line, the third refrigerant flow line, and the second refrigerant flow line in that order and be recovered through the refrigerant recovery line.

10. In paragraph 9, A connector device for rapid charging of an electric vehicle with improved charging efficiency, characterized in that the short-circuit prevention unit is arranged on the third refrigerant oil line.

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