Docking connector assembly for electric vehicle charging equipment

Abstract

In order to achieve the above object, a docking connector assembly according to various embodiments of the present invention is disclosed. The docking connector assembly may include a first connector provided on a charging cart and a second connector provided to be connectable with the first connector, and the second connector may be movable in one or more axial directions and rotatable about any axis.

Description

[Technical Field]

[0001] The present invention relates to a docking connector assembly including a structure for electrical connection between devices, and more particularly to a docking connector assembly for an electric vehicle charging device that compensates for minute positional errors between devices. [Background technology]

[0002] Electric vehicles (EVs) are a futuristic convergence technology that is receiving interest and investment from governments and companies around the world in line with global green growth policies. As a result, the automotive industry is seeing a rapid shift in market demand from traditional oil-based vehicles to electric vehicles. As demand for electric vehicles increases, many technologies are being developed, not only for electric vehicles but also for the infrastructure needed to use them smoothly (charging devices, power supply networks, etc.), and more recently, for methods and technologies to charge a large number of electric vehicles. Generally, conventional electric vehicle charging systems are operated by installing an electric vehicle charger in a space where vehicles can be parked, such as an underground parking lot, and people who want to charge their electric vehicles park in the area where the electric vehicle charger is installed and charge their electric vehicles. However, since parking spaces where electric vehicle chargers can be installed are very limited and the cost of building the infrastructure to install electric vehicle chargers is very high, the demand for chargers is increasing explosively as the number of electric vehicles increases.To solve these problems, there has been an increase in demand for mobile charging devices. Meanwhile, a separate connector may be provided to connect a mobile charging device directly to an electric vehicle or to connect the mobile charging device to a stationary charging device. The connector acts as an electrical / physical bridge that transfers the power of the battery contained in the mobile charging device to the stationary charging device and the electric vehicle. However, since mobile charging devices are very large and heavy, and the amount of power supplied per hour through the connector is very large, imperfect connector connection can lead to malfunctions and fires. Connectors developed to date have had a problem of being difficult to commercialize, as they have a very high rate of connection failure when even a slight positional error occurs between the mobile charging device and the electric vehicle / stationary charging device. The present invention relates to a connector assembly developed to solve the above-mentioned problems, and provides a connector assembly that can be electrically / physically connected without any problems even if some positional error occurs during docking of the connectors. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] (Patent Document 1) Republic of Korea Unexamined Utility Model Publication No. 20-2021-0000504 Summary of the Invention [Problem to be solved by the invention]

[0004] The present invention provides a docking connector assembly for an electric vehicle charging device that enables smooth electrical and physical connection between a mobile charging device and an electric vehicle / stationary charging device / electrical terminal, and that can compensate for errors to achieve electrical and physical connection even if the objects to be connected are not properly aligned during connection, thereby minimizing the risk of malfunction and fire. The problems to be solved by the present invention are not limited to those mentioned above, and other problems not mentioned will be clearly understood by those skilled in the art from the following description. [Means for solving the problem]

[0005] To solve the above-mentioned problems, one embodiment of the present invention provides a docking connector assembly for an electric vehicle charging device, which includes a first connector provided on a charging cart and a second connector that can be coupled to the first connector, and the second connector can be movable in one or more axial directions and can rotate about any axis. In various embodiments, the first connector may include a power transmission device, a first moving part to which power is transmitted from the power transmission device, and a docking part connected to the first moving part and capable of being coupled to the second connector. In various embodiments, the first moving part may include a first guide rail extending in one direction and a first moving body movable on the first guide rail by the power transmission device. In various embodiments, the docking portion may include a first docking terminal to be coupled with the second connector and a docking guide to guide a coupling position so that the first docking terminal is coupled to a certain position of the second connector. In various embodiments, the second connector may include a fixed portion provided on one side of the second charging device or a fixed surface, a second moving portion movably connected to the fixed portion in a first direction, and a rotating portion rotatably connected to the second moving portion. In various embodiments, the fixing portion may include a plurality of support bases arranged at regular intervals, a fixed rail connecting the plurality of support bases, and a height-adjustable body movable along the longitudinal direction of the fixed rail. In various embodiments, the second moving part may include a first fixed body connected to the fixed part, one or more second guide rails connected to the first fixed body and extending in a direction perpendicular to the fixed rail, and a second moving body movably provided along the longitudinal direction of the second guide rails. In various embodiments, the second moving part may further include a first spring part provided on the second guide rail, and the first spring part may be provided on both sides of the second moving body on the second guide rail. In various embodiments, the rotating part may include a second fixed body connected to the second moving part, a rotating body rotatably provided with respect to the second fixed body, and a second spring part provided between the second fixed body and the rotating body. In various embodiments, the second fixed body may include a docking guide mounting portion on which the docking guide is mounted. In various embodiments, the rotating body may include a guide hole through which the docking guide can pass and a second docking terminal that can be connected to the first connector, and the guide hole may include a central hole with a constant diameter and an inclined hole with a gradually increasing diameter. In various embodiments, the number of the guide holes may be at least two, and the second docking terminal may be provided at a center of the two or more guide holes. Other specific details of the invention are included in the detailed description and drawings. [Effects of the Invention]

[0006] According to various embodiments of the present invention, even if the first and second connectors are slightly deviated from their aligned reference positions, the first and second connectors can be coupled without error, thereby reducing the risk of damage and fire. The effects of the present invention are not limited to those mentioned above, and other effects not mentioned will be clearly understood by those skilled in the art from the following description. Various embodiments are described with reference to the following drawings, wherein like reference numerals are used to generally refer to like elements. In the following embodiments, for purposes of explanation, numerous specific details are presented in order to provide a thorough understanding of one or more aspects. [Brief explanation of the drawings]

[0007] [Figure 1] 1 illustrates an exemplary system diagram illustrating a docking connector assembly for an electric vehicle charging device according to one embodiment of the present invention. [Figure 2] 10A to 10C are exemplary views illustrating a coupling process of a first connector and a second connector included in a docking connector assembly for an electric vehicle charging device according to an embodiment of the present invention. [Figure 3] 1 is a side view of a first connector according to an embodiment of the present invention; FIG. [Figure 4] 1A to 1C are exemplary views showing a second connector according to an embodiment of the present invention viewed from various directions. [Figure 5] FIG. 10 is an exemplary view of a second connector according to an embodiment of the present invention, viewed from one direction. [Figure 6] 1A and 1B are diagrams illustrating an example of a coupling process between a first connector and a second connector according to an embodiment of the present invention; [Figure 7] 10 is an exemplary view showing a first spring portion and a second spring portion provided in a second connector according to an embodiment of the present invention; FIG. [Figure 8] 10A and 10B are illustrative diagrams showing that the position of the second connector related to one embodiment of the present invention can be adjusted in multiple directions. DETAILED DESCRIPTION OF THE INVENTION

[0008] The advantages and features of the present invention, as well as methods for achieving them, will become more apparent from the following detailed description of the embodiments in conjunction with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, and may be embodied in various different forms. However, the present invention is defined only by the scope of the claims, and the present invention is not limited to the embodiments disclosed below. The terms used in this specification are for the purpose of describing the embodiments and are not intended to limit the present invention. In this specification, the singular includes the plural unless otherwise specified in the context. The terms "comprises" and / or "comprising" used in this specification do not exclude the presence or addition of one or more other elements in addition to the elements referenced. The same reference numerals refer to the same elements throughout this specification, and "and / or" includes each and every combination of one or more of the referenced elements. Although terms such as "first," "second," etc. are used to describe various elements, it should be understood that these elements are not limited by these terms. These terms are used merely to distinguish one element from another. Therefore, it should be understood that a first element referenced below may also be a second element within the technical spirit of the present invention. Unless otherwise defined, all terms (including technical and scientific terms) used herein may be used in the sense that they can be commonly understood by a person of ordinary skill in the art to which the present invention belongs. Furthermore, terms defined in commonly used dictionaries should not be interpreted ideally or excessively unless they are clearly and specifically defined. The terms "module" and "module" used herein refer to software or hardware components, such as FPGAs or ASICs, that perform a certain function. However, "module" or "module" is not limited to software or hardware. A "module" or "module" may be configured to reside on an addressable storage medium and to execute on one or more processors. Thus, by way of example, a "module" or "module" includes components such as software components, object-oriented software components, class components, and task components, as well as processes, functions, attributes, procedures, subroutines, program code segments, drivers, firmware, microcode, circuits, data, databases, data structures, tables, arrays, and variables. The functionality provided within a component or "module" or "module" may be combined into fewer components and "modules" or "modules" or further separated into additional components and "modules" or "modules." Spatially relative terms such as "below," "beneath," "lower," "above," and "upper" may be used to easily describe the relationship of one component to another, as illustrated in the drawings. Spatially relative terms should be understood to include different orientations of components in use or operation in addition to the orientation illustrated in the drawings. For example, if a component illustrated in the drawings is turned over, a component described as "below" or "beneath" another component may be positioned "above" the other component. Thus, the exemplary term "below" can encompass both an orientation of below and above. Components may be oriented in other directions, and the spatially relative terms may be interpreted accordingly. Although terms such as "first," "second," etc. are used to describe various elements or components, these elements or components are not limited by these terms. These terms are used merely to distinguish one element or component from another. Therefore, a first element or component referred to below may be a second element or component within the technical concept of the present invention.

[0009] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. FIG. 1 illustrates an exemplary system diagram that schematically illustrates a docking connector assembly in accordance with one embodiment of the present invention. As shown in FIG. 1 , the docking connector assembly 1000 of the present invention may include a first connector 100 and a second connector 200. According to an embodiment, the first connector 100 may be provided on a mobile body, and the second connector 200 may be provided on a mobile body or a stationary body. For example, the mobile body may be a charging cart 100a, and the stationary body may be an electric vehicle or a separate charging device. The charging cart 100a may be provided with the first connector 100, and the electric vehicle may be provided with the second connector 200. The specific descriptions of the devices provided with the first and second connectors described above are merely examples, and the present invention is not limited thereto. According to one embodiment of the present invention, the charging cart 100a may include a charging module for charging an electric vehicle. According to the embodiment, an electric vehicle may refer to a vehicle that moves by generating driving force using a battery engine. An electric vehicle may refer to a vehicle that can run by driving an electric motor using only electrical energy supplied from charged battery cells as a power source, without an internal combustion engine. An electric vehicle may be an environmentally friendly vehicle that does not use fossil fuels when running and does not emit carbon dioxide, nitrogen oxides, etc. The charging cart 100a has a connector (i.e., a first connector) that is electrically connected to a charging port (e.g., a charging connector) of the electric vehicle, and can supply power to the electric vehicle through the connector. In an embodiment, the charging cart 100a may be movable so that it can be shared by multiple users within a parking space. The charging cart 100a may include a driving mechanism, allowing it to move within a parking space where multiple vehicles are parked. For example, a user may park their electric vehicle in a specific area within the parking space, move the charging cart 100a to the location where their electric vehicle is parked, and connect the first connector of the charging cart 100a to the electric vehicle to supply power, thereby charging the electric vehicle. According to one embodiment, the charging cart 100a may be an electric cart that can be moved with the assistance of an electric motor to reduce the force required for movement, i.e., the user's labor. Generally, a cart for charging an electric vehicle may be configured by combining a charging module (e.g., an energy storage device) and associated electronic components, resulting in a relatively heavy weight (e.g., approximately 700 kg). In this case, a user may need a lot of force to move the cart to a parking location for their vehicle. In particular, if there are uphill, downhill, or speed bumps along the path of the charging cart 100a, the user may need to exert more force to move the charging cart 100a, making it difficult to control the cart's movement. Difficulty in controlling the movement of the charging cart 100a may cause stability issues. For example, if a user pushes the charging cart 100a downhill and the user's body (e.g., hand) releases its grip on the charging cart 100a, the charging cart 100a may not immediately detect this and provide sensing information related to stopping, which may result in a serious stability issue.

[0010] The charging cart 100a of the present invention can grasp a user's operational intention through various sensor modules and assist the movement of the charging cart 100a. For example, when a user attempts to move the charging cart 100a to charge his or her electric vehicle, the user's operational intention for moving the charging cart 100a (e.g., whether the user intends to push or stop the cart) can be grasped through various sensors provided in the charging cart 100a, and power can be applied to the charging cart 100a accordingly, thereby controlling the movement of the charging cart 100a with less force. In a further embodiment, the charging cart 100a may include an automated robot cart that identifies the location of a parked electric vehicle and approaches the identified location of the electric vehicle to charge it. In this case, a user may use a user terminal (e.g., a smartphone, tablet, PDA, laptop, etc.) to transmit a signal to a server (e.g., an automated robot management server, a parking lot management server, etc.) to call the charging cart 100a. For example, a parking lot may be divided into multiple parking areas, and each parking area may be equipped with a corresponding smart tag (e.g., an NFC tag) (e.g., attached to a pole). A user can use a user terminal to select an NFC tag located in an electric vehicle parking area and transmit a signal to the server to call the charging cart 100a. Meanwhile, the server may map parking lots based on building drawings. The server may identify electric vehicle parking areas in the mapped parking lot based on a signal received from the user terminal and transmit a control command to the charging cart 100a to move the charging cart 100a to the identified parking area. Through this process, the charging cart 100a of the present invention can autonomously move from a standby position to the electric vehicle parking area. The charging cart 100a may also identify the location of the electric vehicle's charging connector, dock the first connector 100 with the identified charging connector, and then charge the electric vehicle. For example, the charging cart 100a of the present invention may be equipped with a short-range position sensor that can sense the location of a charging connector (e.g., a second connector) near the electric vehicle. The charging cart of the present invention can charge an electric vehicle by transmitting electric energy from an electric energy storage device to the electric vehicle. According to one embodiment of the present invention, the charging cart 100a may move to a charging station after charging the electric vehicle. For example, the charging cart 100a may move to the charging station based on a force applied by a user (e.g., a force for operating the cart) or a driving signal (e.g., a return signal) received from a server. Here, the charging station may refer to an area for charging the electric energy storage device of the charging cart 100a. As the charging cart 100a supplies electric energy to the electric vehicle, the electric energy stored in the electric energy storage device of the charging cart 100a may be consumed, and the consumed electric energy may be recharged through a charging device provided at the charging station. In other words, the charging station may refer to an area for charging the charging cart 100a, which moves to a location where an electric vehicle is parked and performs charging.

[0011] According to one embodiment of the present invention, the second connector 200 may be included in the charging device 200a. The charging device 200a according to the present invention may include a battery charging device associated with an electric vehicle or a charging device provided in a charging station for charging the charging cart 100a. Depending on the embodiment, the second connector 200 may be a charging connector associated with an electric vehicle or a charging connector associated with a charging device provided in a charging station. The concept of a charging station includes both fixed and mobile types. In other words, the docking (or coupling) between the first connector 100 and the second connector 200 in the present invention may be related to the coupling of the charging cart 100a to an electric vehicle for charging the electric vehicle, and the coupling of the charging cart 100a to a charging device 200a for charging and power transfer of the charging cart 100a. Generally, a separate connector for electrical connection may be required to charge an electric vehicle through a charging cart 100a associated with a mobile charging device. That is, a connector (e.g., a first connector) provided on the charging cart 100a may be connected to the electric vehicle charging device (e.g., an energy storage device or battery) and serve as an electrical / physical bridge for transmitting electrical energy. In the process of transmitting electrical energy through the connector, if the connector is not properly coupled, it may pose a safety risk, such as a malfunction or fire. In this case, the amount of power supplied per hour through the connector is very large, which may pose a significant safety risk. For example, if a slight positional error occurs between the charging cart 100a and the electric vehicle charging device 200a, a malfunction or fire may occur due to poor coupling, which may result in property and personal damage. In order to prevent the above-mentioned problems, the present invention provides a docking connector assembly that improves electrical / physical coupling by correcting positional errors even when positional errors occur between two devices during the docking process of the connectors for charging. Specific structural features, configurations, and associated effects of the docking connector assembly of the present invention will be described below with reference to FIGS. 2 to 8.

[0012] FIG. 2 is an exemplary view showing a coupling process of a first connector and a second connector included in a docking connector assembly according to an embodiment of the present invention. FIG. 3 is an exemplary side view of a first connector according to an embodiment of the present invention. FIG. 4 is an exemplary view of a second connector according to an embodiment of the present invention viewed from various directions. FIG. 5 is an exemplary view of a second connector according to an embodiment of the present invention viewed from one direction. FIG. 6 is an exemplary view for explaining a coupling process of a first connector and a second connector according to an embodiment of the present invention. FIG. 7 is an exemplary view showing a first spring portion and a second spring portion provided in a second connector according to an embodiment of the present invention. FIG. 8 is an exemplary view showing that the position of a second connector according to an embodiment of the present invention can be adjusted in multiple directions. 2, a docking connector assembly 1000 includes a first connector 100 and a second connector 200, which are electrically and physically coupled to each other as a coupling assembly. In one embodiment, the first connector 100 is provided on a mobile object, and the second connector 200 may be provided on either a mobile object or a fixed object. However, the second connector 400 is often installed on a fixed object such as a stationary charging device or a pole. For example, the first connector 100 may be provided on a charging cart 100a that moves to charge an electric vehicle, and the second connector 200 may be provided on an electric vehicle that is connected to the charging cart 100a to charge the electric vehicle. As another example, the first connector 100 may be provided on a charging cart 100a that moves to charge an electric vehicle, and the second connector 200 may be provided on a charging device 200a that is provided at a charging station to charge the charging cart 100a. The above-described specific descriptions of the devices that each of the first and second connectors is provided are merely examples, and the present invention is not limited thereto. In the embodiment, the first connector 100 and the second connector 200 may be docked (or connected) to charge an electric vehicle, and by connecting the first connector 100 and the second connector 200, electrical energy stored in the charging cart 100a may be transferred to the electric vehicle, thereby charging the electric vehicle to the charging device. That is, electrical energy may be transferred through the connection between the connectors. According to one embodiment of the present invention, the first connector 100 may be movably provided, such as protruding outward from the charging cart 100a. According to the embodiment, a docking terminal (e.g., the first docking terminal) of the first connector 100, which is physically / electrically connected to another device to transmit electrical energy, may need to be protected from external impacts and foreign objects. Accordingly, when not in use (e.g., when not connected to the second connector for charging), the first connector 100 may be located in a position protected by its outer surface, and when in use (e.g., when connected to the second connector for charging), the first connector 100 may protrude and be connected to the second connector 200.

[0013] 3, the first connector 100 may include a first moving unit 110, a motor 120, and a docking unit 130. The motor 120 may generate a driving force, and the first moving unit 110 serves to control the position of the docking unit 130 based on the driving force generated by the motor. According to one embodiment, the motor 120 refers to a device that converts electrical energy into mechanical energy by using the force that a current-carrying conductor receives in a magnetic field, and may be characterized by generating a driving force through the generated mechanical energy. Meanwhile, other types of power transmission devices, such as a hydraulic cylinder, may be used instead of a motor. According to one embodiment, the first moving unit 110 may receive power generated by a motor (or a power transmission device) and control the movement of the docking unit 130 based on the power. More specifically, the first moving unit 110 may include a first guide rail 111 provided along a longitudinal direction corresponding to a specific axis and a first moving body 112 movable on the first guide rail 111 by power generated by a motor 120. As shown in FIG. 3 , the first moving body 112 may move on the first guide rail 111 by the driving force of the motor 120. Here, the movement radius of the first moving body 112 on the first guide rail 111 may be limited by a first movement limiting surface 111-1 and a second movement limiting surface 111-2. That is, the first moving body 112 may move on the first guide rail 111 between the first movement limiting surface 111-1 and the second movement limiting surface 111-2 by the driving force of the motor. According to one embodiment, the docking unit 130 may include a docking terminal (e.g., a first docking terminal) that is directly connected to a docking terminal (e.g., a second docking terminal) of the charging device 200a associated with a mobile or stationary object. If the docking terminal of the docking unit 130 is exposed to the outside, it may pose a risk of electric shock, and therefore must be safely protected when not in use. That is, the docking unit 130 of the present invention may be allowed to move in one axis direction depending on whether it is in use or not. For example, the docking unit 130 may be moved to a first position where it protrudes, or to a second position where it is protected inward. 3, the docking unit 130 may be connected to the first movable body 112. Accordingly, the docking unit 130 may move together with the first movable body 112. Specifically, as the first movable body 112 moves on the first guide rail 111 toward the first movement limiting surface 111-1 by the driving force of the motor 120, the docking unit 130 may move to a first position where it protrudes outward. That is, when the first docking terminal 132 of the first connector 100 is to be connected to the second connector 200, the first movable body 112 may be moved toward the first movement limiting surface 111-1 by the driving force of the motor 120, and the docking unit 130 connected to the first movable body 112 moves together and protrudes outward, thereby enabling connection to the second connector 200. In one example, when charging is completed through connection between the first connector 100 and the second connector 200, the driving force of the motor 120 causes the first movable body 112 to move in the direction of the second movement limiting surface 111-2, and accordingly, the docking part 130 connected to the first movable body 112 moves together and can be moved to a second position protected inside the first connector 100.

[0014] The docking unit 130, including the first docking terminal 132, is normally located at a second position protected by the exterior of the first connector 100. When attempting to couple with the second connector 200, the docking unit 130 is moved by the movement of the first moving body 112 based on the driving force of the motor, and protrudes toward the outside of the first connector 100. That is, the docking unit 130 is provided with a mechanism that is movable in one axis direction (e.g., the y-axis direction in FIG. 2), thereby preventing stability problems that may occur when not in use. In other words, when not in use (e.g., when not coupled with the second connector for charging), the docking unit 130 is located at the second position protected by the exterior of the first connector 100, thereby protecting the first docking terminal from various accidents, such as electric shock or damage to the device. According to one embodiment, the docking unit 130 may include a docking guide 131. The docking guide 131 may guide the coupling position so that the first docking terminal 132 is coupled to a certain position in the second connector 200. For example, the connection between the connectors is based on the transmission of high-voltage electrical energy, so accurate coupling is required, and the connectors must be robust against external impacts even after accurate coupling. The second connector 200 may include a central hole 232-1a through which the docking guide 131 passes, and guide holes 232-1 may be provided around the central hole 232-1a to guide the docking guide 131 so that it moves toward the central hole 232-1a. The docking guide 131 can be easily inserted into the central hole 232-1a through the guide hole 232-1, thereby improving convenience. Furthermore, when the connectors are coupled, the docking guide 131 of the first connector 100 penetrates the central hole 232-1a of the second connector 200, thereby protecting the coupling between the connectors from external impact. As a specific example, referring to FIG. 6, two docking guides 131 are inserted through the two central holes 232-1a, respectively, so that the first docking terminal 132 provided between the docking guides can be coupled with the second docking terminal 232-2. In this case, docking guides 131 may be inserted into the central holes 232-1a above and below the coupled docking terminals. This improves coupling and stability by dispersing external impacts and reducing the impact directly applied to the coupled docking terminals. That is, the docking guides 131 provided in the docking unit 130 facilitate coupling between the connectors and provide a stronger coupling between the connectors after coupling.

[0015] In the embodiment, the length of the first guide rail 111 may be longer than the length of the docking guide 131. This may be to prevent the docking guide 131 from being exposed to the outside when the docking unit 130 is located at the second position where it is protected inside. That is, since the length of the first guide rail 111 is longer than the length of the docking guide 131, when the docking unit 130 is located at the second position, the docking guide 131 may not come off to the outside of the connector (for example, an imaginary line extending from the first movement limiting surface). According to one embodiment, the second connector 200 may be provided in the form of a structure capable of multi-axial movement and rotation for smooth coupling with the first connector 100. Specifically, the second connector 200 may be movable in one or more axial directions and rotatable about any axis. For example, with reference to FIG. 2, the second connector 200 may be movable in the z-axis direction and the x-axis direction and rotatable about the z-axis. More specific features related to the second connector 200 will be described below. According to the embodiment, the second connector 200 may include a fixed portion 210, a second moving portion 220, and a rotating portion 230. In one embodiment, the second connector 200 may include the fixed portion 210 provided on one side of the charging device 200a. The fixed portion 210 may include a mechanism for adjusting the height of the second docking terminal 232-2. Specifically, the fixed part 210 may include two support bases 211, a fixed rail 212, and a height-adjustable body 213. The fixed part 210 may include two support bases 211 arranged at a predetermined interval in the vertical direction. Here, the vertical direction may be relative to the z-axis direction in FIG. 2. The two support bases 211 may be arranged in a vertical direction corresponding to the ground, as shown in FIG. 4. The fixed part 210 may also include a fixed rail 212 connecting the two support bases. The fixed rail 212 may be arranged to be vertical to the ground. The fixed part 210 may also include a height-adjustable body 213 that is vertically movable on the fixed rail. That is, the height-adjustable body 213 may be moved up and down on the fixed rail. According to the embodiment, the second moving unit 220 and the rotating unit 230 may be coupled to the fixed unit 210. Specifically, the second moving unit 220 and the rotating unit 230 may be coupled to the height-moving body 213 of the fixed unit 210. Accordingly, the positions of the second moving unit 220 and the rotating unit 230 may be adjusted in the height direction by moving the height-moving body 213. For example, the height of the second moving unit 220 and the rotating unit 230 may be lowered by moving the height-moving body 213 downward on the fixed rail 212, and the height of the second moving unit 220 and the rotating unit 230 may be increased by moving the height-moving body 213 upward on the fixed rail 212. In this case, since the rotating unit 230 is equipped with the second docking terminal 232-2 for connecting the connectors of the present invention, adjusting the mounting height of the rotating unit 230 may mean adjusting the height of the second docking terminal 232-2. That is, adjusting the height of the height-adjusting body 213 allows for height adjustment of the second docking terminal 232-2, thereby enabling positional correction related to height (e.g., the z-axis direction) during the coupling process between the connectors. As a specific example, if the mounting position of the second connector 200 is higher or lower than the mounting position of the first connector 100, the height of the rotating unit 230 can be adjusted by moving the height-adjusting body 213 to align the positions of the docking terminals of the connectors. In other words, positional correction based on height can improve coupling stability.

[0016] In one embodiment, the second connector 200 may include a second moving unit 220 connected to the fixed unit 210 so as to be movable in a horizontal direction relative to the fixed unit 210. Here, the horizontal direction refers to a direction parallel to the ground and may relate to a direction perpendicular to the direction in which the two support plates 211 are provided. As a more specific example, the horizontal direction related to the movement of the second moving unit 220 may refer to movement in the x-axis direction relative to FIG. 2. According to an embodiment, the second moving part 220 may include a first fixed body 221, a second guide rail 222, and a second moving body 223. Specifically, the second moving part 220 may include a first fixed body 221 connected to the fixed part 210. The first fixed body 221 may be connected to the height-moving body 213 as shown in Fig. 4. According to an embodiment, as shown in Fig. 4(b), two fixed parts 210 may be provided, and the first fixed body 221 may be connected to each of the height-moving bodies 213 provided on each of the two fixed parts 210. 4(b), when the second connector 200 is viewed from above, the left and right sides of the first fixed body 221 may be connected to two height-moving bodies 213 corresponding to the two fixed portions 210, respectively. Accordingly, when the height-moving body 213 is moved on the fixed rail 212, the height of the first fixed body 221 may be adjusted (i.e., moved in the z-axis direction). According to the embodiment, the second moving part 220 may include a second guide rail 222. Specifically, the second moving part 220 may include one or more second guide rails 222 connected to the first fixed body 221 and extending in a direction perpendicular to the fixed rail 212. In this case, the second guide rail 222 may be provided to extend in a direction perpendicular to the fixed rail 212. For example, referring to Fig. 2, the fixed rail 212 may be provided parallel to the z-axis, and the second guide rail 222 may be provided parallel to the x-axis, so that the fixed rail 212 and the second guide rail 222 may be provided in directions perpendicular to each other.

[0017] According to the embodiment, the second moving unit 220 may include a second moving body 223 provided to be movable on a second guide rail 222. The second guide rail 222 may be provided in a direction perpendicular to the direction in which the fixed rail 212 is provided, i.e., in a direction horizontal to the ground. Accordingly, the second moving body 223 provided to be movable on the second guide rail 222 may be moved in a direction horizontal to the ground. As a specific example, the second moving body 223 may be movable in the x-axis direction along the direction in which the second guide rail 222 is provided, as shown in FIG. 2. In one embodiment, a plurality of second guide rails 222 may be provided corresponding to the upper and lower sides of the second fixed body 231. As a specific example, as shown in FIG. 5, two second guide rails 222 may be provided corresponding to the upper and lower sides of the second fixed body 231. In the embodiment, the second fixed body 231 may be connected to the second moving body 223. Accordingly, the second fixed body 231 may be moved by the movement of the second moving body 223. As a specific example, with reference to FIG. 5 , when the second moving body 223 moves leftward along the second guide rail 222, the second fixed body 231 may be moved leftward, and when the second moving body 223 moves rightward along the second guide rail 222, the second fixed body 231 may be moved rightward. In this case, the second fixed body 231 may be provided with a rotating part 230 including a second docking terminal 232-2. That is, the second fixed body 231 may move by the movement of the second moving body 223, thereby adjusting the docking position of the second docking terminal 232-2. Here, the docking position adjustment of the second docking terminal 232-2 through the movement of the second moving body 223 may be performed in a direction perpendicular to the docking position adjustment related to height through the movement of the height moving body 213. That is, the second connector 200 of the present invention can provide adjustment of the docking position along two axes, that is, z-axis position adjustment through movement of the height-moving body 213 on the fixed rail 212 and x-axis position adjustment through movement of the second moving body 223 on the second guide rail 222. Accordingly, even if the object to be connected (e.g., the first connector) is not properly aligned, the error can be compensated for through position adjustment along two axes, thereby providing a more stable and flexible electrical / physical connection. In an additional embodiment, the second moving part 220 may further include a first spring part 222-1 having a certain elastic force or more and provided on the second guide rail 222. The first spring part 222-1 may be provided on both sides of the second moving body 223 on the second guide rail 222. The first spring part 222-1 may transmit a restoring force to the second moving body 223 to return the second moving body 223 to its original position. For example, the second moving body 223 may be moved in one axial direction on the second guide rail 222 to correct its position during the coupling process of the two connectors, and after charging is completed (i.e., when the connectors are separated), the second moving body 223 may return from the corrected position to its original position (e.g., to the center on the second guide rail) via the first spring part 222-1 provided on the second guide rail 222.

[0018] 7(a), the first spring portion 222-1 may be provided to surround the outer circumferential surface of the second guide rail 222. The first spring portion 222-1 may be provided on both sides of the second moving body 223 on the second guide rail 222. Accordingly, even if the second moving body 223 is moved to the left or right side on the second guide rail 222, it can return to its original position through the first spring portion 222-1 located on the left or right side of the second moving body 223. In one embodiment, the rotating unit 230 may be connected to the second moving unit 220 so as to be rotatable based on the second moving unit 220. Specifically, the rotating unit 230 may be connected to the second moving body 223 of the second moving unit 220. That is, the rotating unit 230 may be moved left and right by the movement of the second moving body 223 on the second guide rail 222, as described above. According to the embodiment, the rotating unit 230 may include a second fixed body 231 connected to the second moving unit 220. Specifically, the second fixed body 231 of the rotating unit 230 may be connected to the second moving body 223 of the second moving unit 220. The second fixed body 231 may include two fixed shafts 231-1 corresponding to each other in a vertical direction. Here, the vertical direction may refer to the z-axis direction with reference to FIG. 2. As shown in FIG. 4, the second fixed body 231 may include fixed shafts 231-1 corresponding to each other in an upper direction and a lower direction, and may be connected to the rotating body 232 via the fixed shafts 231-1. The rotating body 232 may be configured to be rotatable from the second fixed body 231 via the two fixed shafts 231-1. Here, the fixed shafts 231-1 may be provided to face each other in the z-axis direction. The rotating body 232 may be provided in contact with the fixed shafts 231-1 based on each of its upper and lower surfaces, and thus may be rotatable from the second fixed body 231. The rotation of the rotating body 232 relative to the second fixed body 231 may be rotation based on the z-axis direction. The rotating body 232 connected via the fixed shafts 231-1 based on the z-axis direction may be rotatable based on the z-axis direction of the second fixed body 231. The rotating body 232 may be provided with a second docking terminal 232-2 for coupling with the first connector 100, and therefore, the rotatable rotating body 232 may mean that the second docking terminal 232-2 is rotatable relative to the second fixed body 231 (or based on the z-axis direction). That is, the second docking terminal 232-2 of the second connector 200 of the present invention can be configured to be movable along two axes (e.g., x-axis and z-axis) and rotatable around the z-axis for smooth coupling with the first connector 100. Therefore, the positional difference between the two connectors can be flexibly corrected based on positional error, improving the stability of the electrical / physical coupling. This ensures the coupling stability between the two connectors and minimizes the risk of device failure and fire.

[0019] In one embodiment, the rotating body 232 may include a guide hole 232-1, a central hole 232-1a, and a second docking terminal 232-2. The second docking terminal 232-2 is provided adjacent to the guide hole 232-1 and may be connected to the first connector. The connection between the first docking terminal 232 and the second docking terminal 232-2 may enable the transmission of electrical energy according to the present invention. Specifically, the rotating body 232 may include one or more central holes 232-1a through which the docking guide 131 of the first connector 100 can pass, guide holes 232-1 formed around the central hole 232-1a to guide the docking guide 131 to the central hole 232-1a even if the docking guide 131 is slightly displaced from its designated position, and second docking terminals 232-2 that are physically and electrically coupled to the first connector 100. Accordingly, even if docking occurs when the charging cart 100a equipped with the first connector 100 and the mobile / fixed body equipped with the second connector 200 are not perfectly aligned, the structural features of the rotating body 232 may facilitate coupling between the two docking terminals. Specifically, the rotating body 232 may include a funnel-shaped guide hole 232-1 on one side that contacts the first connector 100. As shown in FIGS. 5 and 6, the rotating body 232 may include a funnel-shaped guide hole 232-1 that narrows in diameter toward the center hole 232-1a or toward the mounting position of the second fixed body 231. The guide hole 232-1 may be formed in a region adjacent to the outer periphery of the center hole 232-1a. In some embodiments, the center hole 232-1a may have an inner diameter that corresponds to the outer diameter of the docking guide 131. According to some embodiments, the diameter of the guide hole 232-1 may be larger than the diameter of the center hole 232-1a. The narrowest diameter of the guide hole 232-1 may be larger than the diameter of the center hole 232-1a. The guide hole 232-1 has a diameter larger than that of the central hole 232-1a and has a shape that gradually narrows toward the central hole 232-1a, so that when the docking guide 131 of the first connector 100 approaches the periphery of the central hole 232-1a, the structural characteristics of the guide hole 232-1 can guide the docking guide 131 to reach the central hole 232-1a. In the embodiment, as shown in FIG. 6, the end portion of the docking guide 131 is tapered, and the guide hole 232-1 of the rotating part 230 can also have a tolerance optimized to match the tapered shape of the docking guide 131.

[0020] When the docking guide 131 of the first connector 100 is completely inserted into the central hole 232-1a of the second connector 200, the first docking terminal 132 of the first connector 100 and the second docking terminal 232-2 of the second connector 200 can be coupled together. Accordingly, the structural characteristics of the docking guide 131 and the guide hole 232-1 can facilitate coupling between the docking terminals. In other words, improved convenience can be provided in the process of adjusting the positions of the first connector 100 and the second connector 200 to couple them together. In one embodiment, at least two guide holes 232-1 may be provided. In this case, the second docking terminal 232-2 may be provided at the center of the two or more guide holes 232-1. Specifically, as shown in FIG. 5, the second docking terminal 232-2 may be located at the center of the rotating body 232, and two guide holes 232-1 and two center holes 232-1a may be provided corresponding to the upper and lower directions of the second docking terminal 232-2. In addition, the first connector 100 may be provided with two docking guides 131 corresponding to each guide hole 232-1 and each center hole 232-1a. As a specific example, referring to FIG. 6, two docking guides 131 may be inserted through the two center holes 232-1a, respectively, so that the first docking terminal 132 provided between each docking guide can be coupled to the second docking terminal 232-2. In this case, docking guides 131 may be provided above and below the coupled docking terminals by being inserted into the central holes 232-1a. As a result, the coupling fixing force is improved, and in the event of an external impact, the generated impact is dispersed and the impact directly applied to the coupled docking terminals is reduced, thereby improving stability. In other words, the docking guides 131 provided in the docking unit 130 facilitate coupling between the connectors and provide the effect of making the coupling between the connectors more solid after coupling. In one embodiment, the second fixed body 231 may include a docking guide mounting portion 231-2 on which the docking guide 131 of the first connector is mounted. The docking guide 131 passing through the central hole 232-1a of the rotating part 230 may be mounted on the docking guide mounting portion 231-2. Specifically, as shown in Fig. 6(a), the docking guide 131 of the first connector 100 is inserted through the guide hole 232-1 and the central hole 232-1a of the rotating part 230, thereby allowing the first docking terminal 132 of the first connector 100 and the second docking terminal 232-2 of the second connector 200 to be coupled together. When the docking guide 131 completely passes through the central hole 232-1a to couple the first docking terminal 132 and the second docking terminal 232-2, the portion of the docking guide 131 that passes through the central hole 232-1a may be placed on the docking guide mount 231-2, as shown in Figure 6(b). When the two docking terminals are coupled, the docking guide 131 is positioned in contact with the central hole 232-1a and the docking guide mount 231-2, thereby protecting the coupling of the two docking terminals from external impact. That is, even if an impact occurs to the coupling components, the docking guide 131 is configured to be supported by the respective components by contacting the central hole 232-1a and the docking guide mount 231-2, preventing the coupling components (i.e., the coupling portions of the two docking terminals) from receiving the impact.

[0021] According to one embodiment, the rotating part 230 may include a second spring part 231-3 provided between the second fixed body 231 and the rotating body 232. The second spring part 231-3 may be used to apply a restoring force or elastic force to the second fixed body 231 so that the rotating body 232 returns to its original position. Specifically, the second spring part 231-3 may be provided between the second fixed body 231 and the rotating body 232 to apply an elastic restoring force to the rotating body 232. The second spring part 231-3 may be configured to apply an elastic restoring force to the rotating body 232 in relation to the rotation range of the rotating body 232. 7(b), the second spring portion 231-3 may be provided between the rotating body 232 and the second fixed body 231 in relation to the right and left sides of the rotation radius of the rotating body 232. For example, the rotating body 232 may be rotated to the right or left with respect to the second fixed body 231 for connection between the connector (or docking terminal). When the connector is separated after charging is completed, the rotating body 232 can return to its state before rotation based on the elastic restoring force applied from the second spring portion 231-3. That is, even if the rotating portion 230 rotates with respect to the second fixed body 231 for connection between the connectors, it can return to its original position through the second spring portion 231-3. That is, even if the rotating portion 230 is rotated a certain angle, the restoring force acts to return it to its original position. A second connector whose position can be adjusted through rotation about two or more axial directions and a single axial direction will be described below with reference to Fig. 8. Fig. 8 is an illustrative view showing that the position of a second connector according to an embodiment of the present invention can be adjusted in multiple directions. Fig. 8(a) is an illustrative view of second connector 200 as seen from the side, and Figs. 8(b), 8(c), and 8(d) are illustrative views of second connector 200 as seen from the top. Referring to FIG. 8(a), the fixed part 210 may include two support bases 211 spaced apart in the vertical direction. Here, the vertical direction may be relative to the z-axis direction in FIG. 2. The two support bases 211 may be arranged vertically relative to the ground. The fixed part 210 may also include a fixed rail 212 connecting the two support bases. The fixed rail 212 may be arranged vertically relative to the ground. The fixed part 210 may also include a height-adjustable body 213 that is vertically movable on the fixed rail. That is, the height-adjustable body 213 may be moved up and down on the fixed rail. According to an embodiment, the second moving part 220 and the rotating part 230 may be connected to the fixed part 210. Specifically, the second moving part 220 and the rotating part 230 may be connected to the height-adjustable body 213 of the fixed part 210. Accordingly, the positions of the second moving unit 220 and the rotating unit 230 may be adjusted in the height direction by the movement of the height-moving body 213. For example, the height of the second moving unit 220 and the rotating unit 230 may be lowered by the height-moving body 213 moving downward on the fixed rail 212, and the height of the second moving unit 220 and the rotating unit 230 may be increased by the height-moving body 213 moving upward on the fixed rail 212. In this case, since the rotating unit 230 is equipped with the second docking terminal 232-2 for connection between the connectors of the present invention, adjusting the height of the corresponding rotating unit 230 may mean adjusting the height of the second docking terminal 232-2. In other words, adjusting the height of the second docking terminal 232-2 through the height adjustment of the height-moving body 213 may enable positional correction related to height (e.g., in the z-axis direction) during the connection process between the connectors. As a specific example, if the mounting position of the second connector 200 is higher or lower than the mounting position of the first connector 100, the positions of the docking terminals of each connector can be aligned by adjusting the height of the rotating part 230 through the movement of the height-adjusting body 213. In other words, the stability of the connection can be improved by making it possible to correct the upper and lower positions according to height. 8(b), the second moving unit 220 may include a second moving body 223 provided to be movable on a second guide rail 222. The second guide rail 222 may be provided in a direction perpendicular to the direction in which the fixed rail 212 is provided, i.e., in a direction horizontal to the ground. Accordingly, the second moving body 223 provided to be movable on the second guide rail 222 may be moved in a direction horizontal to the ground. As a specific example, the second moving body 223 may be movable in the x-axis direction along the direction in which the second guide rail 222 is provided, as shown in FIG.

[0022] That is, the second connector 200 of the present invention can provide adjustment of the docking position along two axes, that is, z-axis position adjustment through movement of the height-moving body 213 on the fixed rail 212 and x-axis position adjustment through movement of the second moving body 223 on the second guide rail 222. Accordingly, even if the object to be connected (e.g., the first connector) is not properly aligned, the error can be compensated for through position adjustment along two axes, thereby providing a more stable and flexible electrical / physical connection. 8(c), the rotating unit 230 may include a second fixed body 231 connected to the second moving unit 220. Specifically, the second fixed body 231 of the rotating unit 230 may be connected to the second moving body 223. The second fixed body 231 may include two fixed shafts 231-1 corresponding to each other in the vertical direction. Here, the vertical direction may refer to the z-axis direction with reference to FIG. 2. As shown in FIG. 4, the second fixed body 231 may include fixed shafts 231-1 corresponding to each other in the upper and lower directions, and may be connected to the rotating body 232 via the fixed shafts 231-1. The rotating body 232 may be configured to be rotatable from the second fixed body 231 via the two fixed shafts 231-1. Here, the fixed shafts 231-1 may be provided to face each other in the z-axis direction. The rotating body 232 may be provided in contact with the fixed shafts 231-1 based on each of its upper and lower surfaces, and thus may be rotatable from the second fixed body 231. The rotation of the rotating body 232 relative to the second fixed body 231 may be rotation based on the z-axis direction. The rotating body 232 connected via the fixed shafts 231-1 based on the z-axis direction may be rotatable based on the z-axis direction of the second fixed body 231. The rotating body 232 may be provided with a second docking terminal 232-2 for coupling with the first connector 100, and therefore, the rotatable rotating body 232 may mean that the second docking terminal 232-2 is rotatable relative to the second fixed body 231 (or in relation to the z-axis direction). That is, as shown in FIG. 8(c), the rotating body 232 can be rotated within a specific rotation range, which may facilitate alignment for coupling between the docking terminals. In other words, positional correction may be possible through rotation of the rotating body 232 for coupling with the first docking terminal 132 . 8(d), the second docking terminal 232-2 can simultaneously perform position adjustment in the x-axis direction through movement of the second moving body 223 on the second guide rail 222 and position adjustment through rotation of the rotating body 232 about the z-axis, based on the second guide rail 222. In other words, the second docking terminal 232-2 can simultaneously perform position adjustment in the x-axis direction and rotation adjustment about the z-axis, based on the configuration of FIG. That is, the second docking terminal 232-2 of the second connector 200 of the present invention can be configured to be movable along two axes (e.g., x-axis and z-axis) and rotatable around the z-axis for smooth coupling with the first connector 100. Therefore, the positional difference between the two connectors can be flexibly corrected based on positional error, improving the stability of the electrical / physical coupling. This ensures the coupling stability between the two connectors and minimizes the risk of device failure and fire. Although the embodiments of the present invention have been described above with reference to the accompanying drawings, those skilled in the art will understand that the present invention may be embodied in other specific forms without changing the technical spirit or essential characteristics thereof. Therefore, the above-described embodiments should be understood to be illustrative in all respects and not restrictive.

[0023] The description of the embodiments presented is provided to enable any person skilled in the art to use or practice the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the scope of the present invention. The present invention is not intended to be limited to the embodiments presented herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein. [Explanation of symbols]

[0024] 1000: Docking connector assembly 100: First connector 100a: Charging cart 110: First moving section 111: First guide rail 111-1: First movement restriction area 111-2: Second movement restriction surface 112: First moving body 120: Motor 130: Docking section 131: Docking Guide 132: First docking terminal 200: Second connector 200a: Charging device 210: Fixed part 211: Support stand 212: Fixed rail 213: Height adjustable body 220: Second moving section 221: First fixed body 222: Second guide rail 222-1: First Spring Section 223: Second moving body 230: Rotating part 231: Second fixed body 231-1: Fixed axis 231-2: Docking guide mounting section 231-3: Second Spring Section 232: Rotating body 232-1: Guide Hall 232-1a: Central Hall 232-2: Second docking terminal

Claims

1. a first connector provided on the first charging device; and a second connector that is connectable with the first connector; The second connector is The device is movable in one or more axial directions and is rotatable about any axis, The second connector is a fixing portion provided on one side of the second charging device or the fixing surface; a second moving part coupled to the fixed part so as to be movable in a first direction; and a rotating part rotatably connected to the second moving part; The fixing portion is a plurality of support bases provided at regular intervals; a fixed rail connecting the plurality of support bases; and a height-moving body movable along the longitudinal direction of the fixed rail; A docking connector assembly for an electric vehicle charging device, comprising:

2. The first connector is power transmission devices; a first moving part that utilizes power for the power transmission device; and 2. The docking connector assembly for an electric vehicle charging device according to claim 1, further comprising: a docking portion coupled to the first moving portion and configured to be connectable with the second connector.

3. The first moving unit is A first guide rail extending in one direction; and 3. The docking connector assembly for an electric vehicle charging device according to claim 2, further comprising: a first moving body movably mounted on the first guide rail by the power transmission device.

4. The docking unit is a first docking terminal coupled to the second connector; and 4. The docking connector assembly for an electric vehicle charging device according to claim 3, further comprising: a docking guide that guides a coupling position so that the first docking terminal is coupled to one position of the second connector.

5. The second moving unit is a first fixed body connected to the fixed portion; one or more second guide rails connected to the first fixed body and extending in a direction perpendicular to the fixed rail; and 2. The docking connector assembly for an electric vehicle charging device according to claim 1, further comprising: a second movable body provided to be movable along the longitudinal direction of the second guide rail.

6. The second moving unit is a first spring portion provided on the second guide rail; further comprising The first spring portion is The docking connector assembly for an electric vehicle charging device according to claim 5, wherein the docking connector assembly is provided on both sides of the second moving body on the second guide rail.

7. The rotating part is a second fixed body connected to the second moving part; a rotating body rotatably provided with respect to the second fixed body; and a second spring portion provided between the second fixed body and the rotating body; 10. The electric vehicle charging device docking connector assembly of claim 1, comprising:

8. The second fixed body is 8. The docking connector assembly for an electric vehicle charging device according to claim 7, further comprising: a docking guide mounting portion on which the docking guide is mounted.

9. The rotating body is a guide hole through which the docking guide can pass; and a second docking terminal connectable with the first connector; 8. The docking connector assembly for an electric vehicle charging device according to claim 7, wherein the guide hole includes a central hole with a constant diameter and an inclined hole with a gradually increasing diameter.

10. In paragraph 9: The guide hole is It is characterized by being equipped with at least two or more 10. The docking connector assembly for an electric vehicle charging device according to claim 9, wherein the second docking terminal is provided at a center of the two or more guide holes.

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