Charging device for rapid charging of electric vehicles with improved cooling performance and method for manufacturing the same

Abstract

A charging device for rapid charging of an electric vehicle with improved cooling performance 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 part connected to a charging terminal of the electric vehicle for supplying power to the electric vehicle, and a control part for controlling the power supply of the electric vehicle and cooling using the refrigerant, wherein the refrigerant introduced through the refrigerant supply line can be controlled to be recovered through the refrigerant recovery line via the connector part.

Description

Technology Field

[0001] The present invention relates to a charging device for rapid charging of electric vehicles with improved cooling performance and a method for manufacturing the same. Specifically, the invention relates to a charging device for rapid charging of electric vehicles and a method for manufacturing the same, wherein cooling performance is improved by the composition of the power supply terminal and cooling performance and physical and electrical characteristics are improved by a heat treatment step during the manufacturing of the charging device for rapid charging. Background Technology

[0002] With the proliferation of electric vehicles, the installation of electric vehicle chargers is expanding. Additionally, fast chargers capable of rapid charging are being introduced to enable charging within a short period of time. Unlike slow charging, the output voltage of fast chargers for rapid charging ranges from 50V to 450V DC, and the output current reaches 110A; the time required to charge an electric vehicle using such a fast charger is only about 20 to 30 minutes. The output current of fast chargers is expected to increase depending on the battery capacity and charging technology of electric vehicles.

[0003] In this fast charger, an electric vehicle charging cable is connected to the main body, and a charger connector is mounted on the end of the charging cable. The charger connector is then connected to the electric vehicle connector provided in the electric vehicle to supply electricity from the electric vehicle charger to the electric vehicle.

[0004] In this fast charger, an electric vehicle charging cable is connected to the main body, and a charger connector is mounted on the end of the charging cable. The charger connector is then connected to the electric vehicle connector provided in the electric vehicle to supply electricity from the electric vehicle charger to the electric vehicle.

[0005] Heat generated by electric vehicle charging cables can increase the risk of fire. Furthermore, during the process of attaching the charger connector to the electric vehicle connector or detaching it to place the vehicle on the charger, the charging cable may come into physical contact with the user. This is undesirable because excessive heat generated by the charging cable can cause injury, discomfort, or anxiety to the user. The problem to be solved

[0006] One of the various objectives of the present invention is to provide a charging device for rapid charging of electric vehicles capable of improving cooling performance.

[0007] One of the various objectives of the present invention is to provide a method for manufacturing a charging device for rapid charging of electric vehicles that can improve cooling performance and physical and electrical characteristics. means of solving the problem

[0008] A charging device for rapid charging of an electric vehicle with improved cooling performance according to exemplary embodiments of the present invention may include 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 part connected to a charging terminal of the electric vehicle for supplying power to the electric vehicle, and a control part for controlling the power supply of the electric vehicle and cooling using the refrigerant, and the refrigerant introduced through the refrigerant supply line may be controlled to be recovered through the refrigerant recovery line via the connector part.

[0009] It may further include a refrigerant transit line provided inside the connector portion, 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, and the refrigerant may be controlled to flow sequentially through the refrigerant supply line, the refrigerant transit line, and the refrigerant recovery line to be recovered.

[0010] The connector part may further include a power supply terminal installed thereon and in direct contact with the charging terminal of the electric vehicle, and the power supply terminal may be made of an aluminum alloy.

[0011] The above power supply terminal may be composed of 0.3 to 1.3 wt% Mg, 0.3 to 0.9 wt% Si, 0.9 wt% or less Fe, 0.6 wt% or less Cu, 0.3 wt% or less Zn, 0.25 wt% or less Cr, 0.2 wt% or less Mn, 0.2 wt% or less other materials, and the remainder Al.

[0012] The above power supply terminal may be composed of 0.85 to 1.1 wt% Mg, 0.6 to 0.8 wt% Si, 0.3 wt% or less Fe, 0.3 wt% or less Cu, 0.2 wt% or less Zn, 0.15 wt% or less Cr, 0.1 wt% or less Mn, 0.05 wt% or less Ti, 0.05 wt% or less other materials and the remainder Al.

[0013] The above power supply terminal is manufactured by performing a first to third heat treatment process on the aluminum alloy, and the second heat treatment step can be performed at a temperature lower than the heating temperature for extrusion and higher than the first and third heat treatment steps.

[0014] A method for manufacturing a charging device for rapid charging of an electric vehicle with improved cooling performance according to exemplary embodiments of the present invention may include the steps of: heating and extruding an aluminum alloy fillet; cooling and drawing the extruded aluminum alloy; performing a first heat treatment on the drawn aluminum alloy; processing the first heat-treated aluminum alloy into a charging terminal shape; performing a second heat treatment on the processed aluminum alloy in the charging terminal shape; and performing a third heat treatment on the second heat-treated aluminum alloy, wherein the second heat treatment step may be performed at a temperature lower than the heating temperature for extrusion and higher than the first and third heat treatment steps.

[0015] The heating temperature of the aluminum alloy fillet can be performed at a temperature of 560 ℃ to 600 ℃, the first heat treatment step and the third heat treatment step can each be performed at a temperature of 170 ℃ to 220 ℃, and the second heat treatment step can be performed at a temperature of 500 ℃ to 550 ℃.

[0016] The first heat treatment step and the third heat treatment step can each be performed for a period of 8 hours or more, and the second heat treatment step can be performed for a period of 1 hour to 3 hours.

[0017] The method may further include a step of plating copper on the above-mentioned third heat-treated aluminum alloy and a step of plating silver on the above-mentioned copper-plated aluminum alloy, and the copper plating step and the silver plating step may be performed sequentially.

[0018] Each of the features of the above-described embodiments may be implemented in combination in other embodiments, provided that such features do not contradict or are not exclusive of other embodiments. Effects of the invention

[0019] According to various embodiments of the present invention, the cooling performance of a charging device for rapid charging of an electric vehicle can be improved by the chemical composition of the power supply terminal.

[0020] According to various embodiments of the present invention, the cooling performance, physical and electrical performance of a charging device for rapid charging of an electric vehicle can be improved by a first to third heat treatment step.

[0021] The effects of the present invention are not limited to those described above, and other unmentioned effects will be clearly recognized by a person skilled in the art from the description below. Brief explanation of the drawing

[0022] FIG. 1 is a drawing for explaining a charging device for rapid charging of an electric vehicle according to exemplary embodiments of the present invention. Figure 2 is a side view of Figure 1. FIG. 3 is a drawing for explaining a power supply line of a charging device for rapid charging of an electric vehicle according to exemplary embodiments of the present invention. FIG. 4 is a drawing for explaining the refrigerant flow line and short-circuit prevention part of a charging device for rapid charging of an electric vehicle according to exemplary embodiments of the present invention. FIG. 5 is a cross-sectional view of a connector portion of a charging device for rapid charging of an electric vehicle according to exemplary embodiments of the present invention. FIG. 6 is a diagram showing the flow of a refrigerant in a charging device for rapid charging of an electric vehicle according to exemplary embodiments of the present invention. Figure 7 is a plan view of Figure 6. FIG. 8 is a flowchart illustrating a method for manufacturing a charging device for rapid charging of an electric vehicle according to exemplary embodiments of the present invention. Specific details for implementing the invention

[0023] 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, apparatuses, and / or systems described herein. However, this is merely illustrative and the present invention is not limited thereto.

[0024] In describing the embodiments of the present invention, detailed descriptions of known technologies related to the present invention are omitted if it is determined that such detailed descriptions may unnecessarily obscure the essence of the present invention. Furthermore, the terms described below are defined in consideration of their functions within the present invention, and these may vary depending on the intentions or practices of the user or operator. Therefore, such definitions should be based on the content throughout this specification. Terms used in the detailed description are intended merely to describe the embodiments of the present invention and should not be limiting in any way. Unless explicitly stated otherwise, expressions in the singular form include the meaning of the plural form. In this description, expressions such as "include" or "comprise" are intended to refer to certain characteristics, numbers, steps, actions, elements, parts thereof, or combinations thereof, and should not be interpreted to exclude the existence or possibility of one or more other characteristics, numbers, steps, actions, elements, parts thereof, or combinations thereof other than those described.

[0025] In addition, terms such as first, second, A, B, (a), (b), etc. may be used when describing the components of the embodiments of the present invention. These terms are used merely to distinguish the components from other components, and the essence, order, or sequence of the components is not limited by the terms.

[0026] Below, a charging device for rapid charging of electric vehicles with improved cooling performance will be described in detail through drawings.

[0027] FIG. 1 is a drawing for explaining a charging 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.

[0028] Referring to FIGS. 1 and 2, a charging 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 part (40), a terminal part (50), and a control part (not shown).

[0029] The power supply line (10) is provided to supply power and may have a hollow structure in which a refrigerant can flow inside.

[0030] 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 it is understood that the first power supply line (10a) may supply negative (-) power and the second power supply line (10b) may supply positive (+) power.

[0031] 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.

[0032] The connector part (40) may be provided to be connectable to the charging terminal of the electric vehicle for power supply to the electric vehicle. The connector part (40) is connected to one end of the power supply line (10) and can receive power from the power supply line (10) and transmit it to the electric vehicle.

[0033] The terminal section (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).

[0034] 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 power supply line (10) connected.

[0035] 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.

[0036] The refrigerant flow pipe (54) forms a flow 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 (54) may include a refrigerant supply pipe (541) and a refrigerant recovery pipe (543).

[0037] 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 embedded inside the first power supply line (10a).

[0038] 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 embedded inside the second power supply line (10b).

[0039] In one embodiment, the refrigerant introduced through the refrigerant supply line (22) can be controlled to be recovered through the refrigerant recovery line (24) via the connector part (40).

[0040] The flow of the refrigerant and the refrigerant flow line (20) will be explained in more detail below through FIGS. 4 to 7.

[0041] The control unit (not shown) can control the power supply of the electric vehicle and cooling using a refrigerant.

[0042] More specifically, the control unit (not shown) can control the power supply of the electric vehicle and the cooling using the refrigerant by controlling the refrigerant flow rate, power supply amount, etc.

[0043] 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.

[0044] Referring to FIG. 3, the power supply line (10) of the charging device (1) for rapid charging of an electric vehicle according to exemplary embodiments of the present invention may be composed of a coil part (101), a conductor part (103), and a covering tube (105).

[0045] The power supply line (10) has a hollow structure in which a refrigerant can flow inside, so that a refrigerant flow line (20) to be described later can be built in.

[0046] The power supply line (10) may be composed of a coil part (101), a conductor part (103), and a covering tube (105).

[0047] The coil portion (101) can be formed to have a hollow structure in which refrigerant can flow inside. That is, a refrigerant flow line (20), which will be described later, can be embedded inside the coil portion (101).

[0048] In one embodiment, the coil portion (101) may include at least one selected from the group consisting of CCA (Copper Clad Aluminum) and copper (Copper, Cu).

[0049] More specifically, the coil portion (101) may be composed of 50 to 90 weight% of CCA (Copper Clad Aluminum) and 10 to 50 weight% of copper (Copper, Cu), and preferably may be composed of 80 weight% of CCA (Copper Clad Aluminum) and 20 weight% of copper (Copper, Cu).

[0050] The conductor portion (103) may be provided to surround the outer surface of the coil portion (101).

[0051] The conductor portion (103) may be a braided conductor in which a plurality of stranded wires are braided to form a net shape. More specifically, the conductor portion (103) may be formed by twisting a plurality of the stranded wires in the longitudinal direction.

[0052] In one embodiment, the conductor portion (103) may be configured to include at least one selected from the group consisting of copper (Cu), aluminum (Al), and aluminum (Al) alloy.

[0053] However, the present invention is not necessarily limited thereto, and it goes without saying that any material can be applied to the conductor part (103) as long as it has very low resistance to electricity and can transmit electricity well.

[0054] The covering tube (105) may be formed to wrap around the outer surface of the conductor portion (103). The covering tube (105) may be made of an insulating material that does not conduct electricity so as to be electrically separated from the conductor portion (103).

[0055] In one embodiment, the coating 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.

[0056] 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 part (103).

[0057] FIG. 4 is a drawing for explaining the refrigerant flow line and 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 the connector part of a connector device for rapid charging of an electric vehicle according to exemplary embodiments of the present invention.

[0058] FIG. 6 is a diagram showing the flow of a 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.

[0059] Referring to FIGS. 4 to 7, the connector part (40) according to exemplary embodiments of the present invention may include a connector case (42) and a power delivery part (44).

[0060] The connector case (42) can form the exterior of the connector part (40) and can be equipped with a power transmission part (44) inside.

[0061] A pair of power delivery units (44) may be provided inside the connector case (42). A pair of power delivery units (44) may be provided to have the same size and shape as each other.

[0062] The power delivery unit (44) may be configured such that at least a portion is located inside the connector case (42) and the remaining portion is exposed outside the connector case (42).

[0063] In one embodiment, 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.

[0064] The power delivery unit (44) may include a power supply line connection unit (441) and a power supply terminal (443). The power supply line connection unit (441) and the power supply terminal (443) may be provided as a single unit.

[0065] The power supply line connection part (441) is coupled to one side of the connector case (42), and the power supply line (10) can be connected.

[0066] 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 connected power supply line (10). Therefore, the first power supply line connection part (441a) and the second power supply line connection part (441b) will be described without distinction below.

[0067] In one embodiment, the power supply line connection part (441) can be connected to the power supply line (10) by inserting one end of the power supply line (10) into one side of the power supply line (10) for a predetermined length. More specifically, the power supply line connection part (441) can be inserted between the conductor part (103) and the sheathing tube (105) of the power supply line (10) for a predetermined length. Accordingly, the outer surface of the power supply line connection part (441) contacts the inner surface of the sheathing tube (105) for a predetermined area, and the inner surface of the power supply line connection part (441) contacts the outer surface of the conductor part (103) for a predetermined area, thereby connecting the power supply line connection part (441) and the power supply line (10).

[0068] The power supply line connection part (441) is formed of a conductor, so that power can be supplied from the power supply line (10) as the inner surface of the power supply line connection part (441) comes into contact with the conductor part (103) for a predetermined area.

[0069] The power supply line (10) can be brought 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).

[0070] That is, the power supply line (10) is positioned at a predetermined distance from the other end of the power supply line connection part (441), and a predetermined space may be formed between the end of the power supply line (10) and the end of the power supply line connection part (441).

[0071] The power supply terminal (443) is installed in the connector part (40) and can be directly contacted with the charging terminal of the electric vehicle.

[0072] In one embodiment, the power supply terminal (443) may be made of aluminum alloy.

[0073] The power supply terminal (443) may be an aluminum alloy composed of 0.3 to 1.3 weight% Mg (magnesium), 0.3 to 0.9 weight% Si (silicon), 0.9 weight% or less Fe (iron), 0.6 weight% or less Cu (copper), 0.3 weight% or less Zn (zinc), 0.25 weight% or less Cr (chromium), 0.2 weight% or less Mn (manganese), 0.2 weight% or less other materials, and the remainder Al (aluminum).

[0074] More specifically, the power supply terminal (443) may be composed of 0.85 to 1.1 wt% Mg, 0.6 to 0.8 wt% Si, 0.3 wt% or less Fe, 0.3 wt% or less Cu, 0.2 wt% or less Zn, 0.15 wt% or less Cr, 0.1 wt% or less Mn, 0.05 wt% or less Ti, 0.05 wt% or less other materials and the remainder Al.

[0075] In one embodiment, the other material may include at least one selected from the group consisting of V (vanadium), Ni (nickel), Bi (bismuth), Pb (plumbum), B (boron), and Zr (zirconium).

[0076] The power supply terminal (443) can have improved cooling performance as it is composed of the above-described composition.

[0077] Additionally, the power supply terminal (443) is manufactured by performing a first to third heat treatment process on the aluminum alloy, and the second heat treatment step can be performed at a temperature lower than the heating temperature for extrusion and higher than the first and third heat treatment steps.

[0078] A charging 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 into a hollow structure formed inside the coil portion (101).

[0079] The refrigerant flow line (20) may include a refrigerant supply line (22), a refrigerant recovery line (24), and a refrigerant transit line (26).

[0080] The refrigerant supply line (22) is a line for introducing refrigerant, and the refrigerant recovery line (24) is a line for recovering the introduced refrigerant. The refrigerant transit line (26) can connect one end of the refrigerant supply line (22) and one end 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 transit line (26).

[0081] The refrigerant flow line (20) can be embedded in a hollow structure formed inside the power supply line (10), at least a portion of which is embedded in the hollow structure formed inside the power supply line (10), thereby allowing the power supply line (10) to be cooled more effectively.

[0082] That is, at least a portion of the refrigerant flow line (20) can be formed to penetrate the center of the first power supply line (10a) and the second power supply line (10b), respectively.

[0083] In one embodiment, the refrigerant flow line (20) embedded in the first power supply line (10a) performs the function of either the refrigerant supply line (22) or the refrigerant recovery line (24), and the refrigerant flow line (20) embedded in the second power supply line (10b) can perform the function of the other refrigerant supply line (22) or the refrigerant recovery line (24). In the case of this embodiment, the refrigerant flow line (20) embedded in the first power supply line (10a) is the refrigerant supply line (22), and the refrigerant flow line (20) embedded in the second power supply line (10b) is the refrigerant recovery line (24).

[0084] However, the present invention is not necessarily limited thereto, and the refrigerant flow line (20) embedded in the first power supply line (10a) may be a refrigerant recovery line (24), and the refrigerant flow line (20) embedded in the second power supply line (10b) may be a refrigerant supply line (22).

[0085] The refrigerant transit line (26) may be provided inside the connector case (42). More specifically, the refrigerant transit line (26) may have a structure that connects the first power supply line connection part (441a) and the second power supply line connection part (441b).

[0086] The refrigerant transit line (26) may include a first refrigerant transit line (261) formed in the internal space of the first power supply line connection part (441a), a second refrigerant transit line (263) formed in the internal space of the second power supply line connection part (441b), and a third refrigerant transit line (265) formed in the internal space of the connector case (42).

[0087] The first refrigerant line (261) can be formed in the internal space formed between the end of the first power supply line (10a) and the other end of the first power supply line connection part (441a) inside the first power supply line connection part (441a).

[0088] The second refrigerant line (263) can be formed in the internal space formed at the end of the second power supply line (10b) and the other end of the second power supply line connection part (441b) inside the second power supply line connection part (441b).

[0089] The third refrigerant line (265) can be formed in the internal space formed between the first power supply line connection part (441a) and the second power supply line connection part (441b).

[0090] In one embodiment, the refrigerant supplied from the refrigerant supply line (22) can be recovered by sequentially flowing through the first refrigerant transit line (261), the third refrigerant transit line (265), and the second refrigerant transit line (263) in this order to the refrigerant recovery line (24).

[0091] 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 transit line (261), the third refrigerant transit line (265), and the second refrigerant transit line (263). After flowing through the second refrigerant transit line (263), the refrigerant can be recovered through the refrigerant recovery line (24).

[0092] However, the present invention is not necessarily limited thereto, and if 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 flow sequentially through the second refrigerant transit line (263), the third refrigerant transit line (265), and the first refrigerant transit line (261) to be recovered into the refrigerant recovery line (24).

[0093] Referring to FIGS. 4 to 7, the charging device (1) for rapid charging of an electric vehicle according to exemplary embodiments of the present invention may further include a short circuit prevention part (30).

[0094] The short-circuit prevention unit (30) is provided in at least a part of the refrigerant transit line (26) so as to maintain an insulation function even in a cryogenic state provided by the refrigerant. More specifically, the short-circuit prevention unit (30) may be placed on the third refrigerant transit line (265).

[0095] That is, the short-circuit prevention part (30) is formed to have a hollow structure inside, and the third refrigerant transit line (265) can be embedded inside the short-circuit prevention part (30).

[0096] As the short circuit prevention part (30) is placed on the third refrigerant transit line (265), it can prevent a short circuit caused by the refrigerant leaking out of the connector case (42).

[0097] In one embodiment, the short-circuit prevention member (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.

[0098] In particular, the above-mentioned PEEK (Polyether Ether Ketone) is a semicrystalline thermoplastic plastic that possesses excellent chemical resistance and mechanical strength over a wide temperature range, low moisture absorption, robust fire resistance, and excellent dimensional stability.

[0099] Accordingly, the short-circuit prevention unit (30) may necessarily include the above-mentioned PEEK (Polyether Ether Ketone). Since the short-circuit prevention unit (30) includes the above-mentioned PEEK (Polyether Ether Ketone), it can maintain an insulation function even in the cryogenic state of the refrigerant.

[0100] The power supply terminal (443) is coupled to the other side opposite to one side of the connector case (42) and can transmit power supplied from the power supply line (10) to the electric vehicle. The power supply terminal (443) may be provided to correspond to the charging terminal of the electric vehicle so as to be insertable into the charging terminal of the electric vehicle.

[0101] The power supply terminal (443) can be formed integrally with the power supply line connection part (441).

[0102] That is, the power supply terminal (443) may include a first power supply terminal (443a) formed integrally with the first power supply line connection part (441a) and a second power supply terminal (443b) formed integrally with the second power supply line connection part (441b).

[0103] The first power supply terminal (443a) receives power from the first power supply line connection part (441a), and the second power supply terminal (443b) can receive power from the second power supply line connection part (441b).

[0104] Hereinafter, a method for manufacturing a charging device for rapid charging of electric vehicles with improved cooling performance will be described in detail through FIG. 8.

[0105] FIG. 8 is a flowchart illustrating a method for manufacturing a charging device for rapid charging of an electric vehicle according to exemplary embodiments of the present invention.

[0106] Referring to FIG. 8, a method for manufacturing a charging device (1) for rapid charging of an electric vehicle according to exemplary embodiments of the present invention may include the steps of: heating and extruding an aluminum alloy fillet (S1); cooling and drawing the extruded aluminum alloy (S2); performing a first heat treatment on the drawn aluminum alloy (S3); processing the first heat-treated aluminum alloy into a charging terminal shape (S4); performing a second heat treatment on the processed aluminum alloy in the shape of a charging terminal (S5); and performing a third heat treatment on the second heat-treated aluminum alloy (S6).

[0107] In the aluminum alloy fillet heating and extrusion step (S1), the heating temperature of the aluminum alloy fillet can be performed at a temperature of 560 ℃ to 600 ℃.

[0108] After the aluminum alloy fillet heating and extrusion step (S1) is performed, the extruded aluminum alloy may be cooled and then drawn (S2).

[0109] In one embodiment, in step (S2), the aluminum alloy may be cooled by a water cooling method.

[0110] However, the present invention is not necessarily limited thereto, and any method other than the water cooling method may be adopted as long as the aluminum alloy can be effectively cooled.

[0111] After the step (S2) of cooling and drawing the extruded aluminum alloy is performed, the step (S3) of performing a first heat treatment on the drawn aluminum alloy may be performed.

[0112] The first heat treatment step (S3) can be performed at a temperature of 170 ℃ to 220 ℃ and can be performed for 8 hours or more.

[0113] More specifically, the first heat treatment step (S3) can be performed at a temperature of 180 ℃ to 200 ℃.

[0114] After the first heat treatment step (S3) is performed, the first heat-treated aluminum alloy may be processed into a charging terminal shape (S4).

[0115] After the above step (S4) is performed, a second heat treatment step (S5) may be performed.

[0116] In one embodiment, the second heat treatment step (S5) can be performed at a temperature lower than the heating temperature for extrusion (S1) and higher than the first heat treatment step (S3) and the third heat treatment step (S6).

[0117] The second heat treatment step (S5) is performed at a temperature of 500 ℃ to 550 ℃ and can be performed for a period of 1 hour to 3 hours. More specifically, the second heat treatment step (S5) is performed at a temperature of approximately 530 ℃ and can be performed for a period of 2 hours.

[0118] As described above, the second heat treatment step (S5) is performed at a higher temperature than the first and third heat treatment steps (S3, S6), thereby improving cooling performance and improving both physical and electrical properties.

[0119] After the second heat treatment step (S5) is performed, a third heat treatment step (S6) can be performed on the second heat-treated aluminum alloy.

[0120] The third heat treatment step (S6) can be performed at a temperature of 170 ℃ to 220 ℃ and can be performed for 8 hours or more.

[0121] Preferably, the third heat treatment step (S6) can be performed at a temperature of 180 ℃ to 210 ℃ and for 10 hours.

[0122] The method for manufacturing a charging device (1) for rapid charging of an electric vehicle according to exemplary embodiments of the present invention may further include a copper plating step (S7) and a silver plating step (S8).

[0123] After the third heat treatment step (S6) is performed, the copper plating step (S7) can be performed.

[0124] The copper plating step (S7) may be a step of plating copper on the above-mentioned third heat-treated aluminum alloy.

[0125] After the copper plating step (S7) is performed, the silver plating step (S8) can be performed.

[0126] The silver plating step (S8) may be a step of plating silver on the copper-plated aluminum alloy.

[0127] As one embodiment, the copper plating step (S7) and the silver plating step (S8) may be performed sequentially.

[0128] Referring to all of FIGS. 1 to 8, the charging device (1) for rapid charging of an electric vehicle according to exemplary embodiments of the present invention has a hollow structure in which a refrigerant can flow inside a power supply line (10), and by embedding a refrigerant flow line (20) in the hollow structure formed inside the power supply line (10), the contact area between the power supply line (10) and the refrigerant is improved so that the power supply line (10) can be effectively cooled.

[0129] According to exemplary embodiments of the present invention, a charging device (1) for rapid charging of an electric vehicle is equipped with a short circuit prevention part (30) that maintains an insulation function even in a cryogenic state in the refrigerant transit line (26), thereby preventing a short circuit caused by refrigerant leakage, and accordingly, the charging efficiency of the charging device (1) for rapid charging of an electric vehicle can be greatly improved.

[0130] In one embodiment, the short-circuit prevention member (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.

[0131] In the charging device (1) for rapid charging of an electric vehicle according to exemplary embodiments of the present invention, the power supply terminal (443) is composed of 0.85 to 1.1 wt% Mg, 0.6 to 0.8 wt% Si, 0.3 wt% or less Fe, 0.3 wt% or less Cu, 0.2 wt% or less Zn, 0.15 wt% or less Cr, 0.1 wt% or less Mn, 0.05 wt% or less Ti, 0.05 wt% or less other materials and the remainder Al, so that the cooling performance may be improved.

[0132] In addition, the method for manufacturing a charging device (1) for rapid charging of an electric vehicle according to exemplary embodiments of the present invention includes first to third heat treatment steps (S3, S5, S6), thereby improving not only the cooling performance of the power supply terminal (443) but also the physical and electrical characteristics.

[0133] Although various embodiments of the present invention have been described in detail above, those skilled in the art will understand that various modifications can be made to the above-described embodiments 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 by the claims set forth below as well as equivalents thereof. Explanation of the symbols

[0134] 1 : Charging device for rapid charging of electric vehicles 10 : Power supply line 20 : Refrigerant flow line 30: Short-circuit prevention part 40: Connector part 50 : Terminal section

Claims

Claim 1 A power supply line in which a power system and a cooling system are integrally formed, including a conductor portion that transmits power and through which a refrigerant flows inside; a connector portion that includes a power supply terminal configured to be connected via contact with a charging terminal of an electric vehicle and is electrically connected to the power supply line to supply the power to the electric vehicle; and a control portion for controlling the power supply of the electric vehicle and cooling using the refrigerant; wherein the refrigerant is characterized in that a refrigerant supply line and a refrigerant recovery line are formed as the refrigerant flows through the interior of the power supply line, and the connector portion comprises a pair of power transmission portions in which the power supply line is introduced for a predetermined length at one end and is electrically connected to the power supply line. A charging device for rapid charging of an electric vehicle with improved cooling performance, comprising: a short-circuit prevention member provided between the pair of power transmission members inside the connector member and forming a hollow on the inside through which the refrigerant can flow; wherein the short-circuit prevention member controls the refrigerant supplied through at least a part of the power supply line to be recovered through the remaining one of the power supply lines via the hollow formed inside the short-circuit prevention member; and wherein the power supply terminal is an aluminum alloy composed of 0.3 to 1.3 wt% Mg, 0.3 to 0.9 wt% Si, 0.9 wt% or less Fe, 0.6 wt% or less Cu, 0.3 wt% or less Zn, 0.25 wt% or less Cr, 0.2 wt% or less Mn, 0.2 wt% or less other materials, and the remainder Al. Claim 2 A charging device for rapid charging of an electric vehicle with improved cooling performance, wherein, in claim 1, either end of the refrigerant supply line and either end of the refrigerant recovery line are connected to connect the refrigerant supply line and the refrigerant recovery line, and further comprising a refrigerant transit line formed by flowing through a hollow formed inside the short-circuit prevention part; wherein the refrigerant is controlled to flow sequentially through the refrigerant supply line, the refrigerant transit line, and the refrigerant recovery line to be recovered. Claim 3 delete Claim 4 delete Claim 5 A charging device for rapid charging of an electric vehicle with improved cooling performance according to claim 1, wherein the power supply terminal is composed of 0.85 to 1.1 wt% Mg, 0.6 to 0.8 wt% Si, 0.3 wt% or less Fe, 0.3 wt% or less Cu, 0.2 wt% or less Zn, 0.15 wt% or less Cr, 0.1 wt% or less Mn, 0.05 wt% or less Ti, 0.05 wt% or less other materials, and the remainder Al. Claim 6 A charging device for rapid charging of an electric vehicle with improved cooling performance according to claim 1, wherein the power supply terminal is manufactured by performing a first to third heat treatment process on the aluminum alloy, and the second heat treatment process is performed at a temperature lower than the heating temperature for extrusion and higher than the first and third heat treatment steps. Claim 7 A charging device for rapid charging of an electric vehicle with improved cooling performance according to claim 1, wherein the power supply terminal is manufactured by sequentially performing the steps of: heating and extruding an aluminum alloy fillet; cooling and drawing the extruded aluminum alloy; performing a first heat treatment on the drawn aluminum alloy; processing the first heat-treated aluminum alloy into a charging terminal shape; performing a second heat treatment on the processed aluminum alloy in the charging terminal shape; and performing a third heat treatment on the second heat-treated aluminum alloy; wherein the second heat treatment step is performed at a temperature lower than the heating temperature for extrusion and higher than the first and third heat treatment steps. Claim 8 A charging device for rapid charging of an electric vehicle with improved cooling performance, characterized in that, in claim 7, the heating temperature of the aluminum alloy fillet is performed at a temperature of 560 ℃ to 600 ℃, the first heat treatment step and the third heat treatment step are each performed at a temperature of 170 ℃ to 220 ℃, and the second heat treatment step is performed at a temperature of 500 ℃ to 550 ℃. Claim 9 A charging device for rapid charging of an electric vehicle with improved cooling performance, characterized in that, in claim 8, the first heat treatment step and the third heat treatment step are each performed for a period of 8 hours or more, and the second heat treatment step is performed for a period of 1 hour to 3 hours. Claim 10 A charging device for rapid charging of an electric vehicle with improved cooling performance, characterized in that, in claim 7, the power supply terminal is manufactured by further performing the step of plating copper on the 3rd heat-treated aluminum alloy; and the step of plating silver on the copper-plated aluminum alloy, wherein the copper plating step and the silver plating step are performed sequentially.

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