Power transfer apparatus and electric vehicle charging apparatus comprising same

Abstract

An electric vehicle charging apparatus according to one embodiment of the present invention comprises one or more chargers that receive power through a power transfer apparatus. The power transfer apparatus comprises: one or more bus bar pairs including a positive electrode bus bar and a negative electrode bus bar; and a connection unit connectable to one or more power-requiring apparatuses, wherein the bus bar pairs are formed along at least a portion of an inner upper edge of the electric vehicle charging apparatus.

Description

Power transmission device and electric vehicle charging device including the same

[0001] This application claims the benefit of the filing dates of Korean Patent Application No. 2024-0155817 filed with the Korean Intellectual Property Office on November 6, 2024, and Korean Patent Application No. 10-2025-0157309 filed with the Korean Intellectual Property Office on October 28, 2025, and all contents disclosed in the documents of said Korean patent applications are incorporated into this specification.

[0002] The present invention relates to a power transmission device and a charging device including the same, and more specifically, to a power transmission device having a busbar-type power transmission structure and an electric vehicle charging device including the same.

[0003] Recently, consumer interest and demand for electric vehicles (EVs) are increasing as they emerge as the most effective alternative for reducing greenhouse gas emissions and improving energy efficiency. Unlike conventional internal combustion engine vehicles, electric vehicles (EVs) require components such as batteries, electric motors, inverters, converters, and Battery Management Systems (BMS).

[0004] Rechargeable secondary batteries are primarily used for electric vehicles. Secondary batteries, which can be recharged and reused after use, are manufactured into battery modules or battery packs by connecting multiple battery cells in series according to the output capacity required by the device, and are used as power sources for various devices. Secondary batteries are used in a wide range of fields, from small advanced electronic devices such as smartphones to electric bicycles, electric vehicles, and Energy Storage Systems (ESS).

[0005] A prerequisite for the widespread adoption of electric vehicles is the establishment of charging infrastructure, including charging stations. Charging stations installed at rest areas and similar locations generally receive power directly from the grid to perform rapid charging of electric vehicles. Energy Storage Systems (ESS) are also installed to ensure a stable power supply for these rapid charging stations. To secure the business viability of charging services utilizing energy storage systems, minimizing installation space and maximizing available energy serve as critical factors.

[0006] To this end, AC-based cable-connected container-type electric vehicle charging stations have been used in the past. However, this type of electric vehicle charging station uses a one-to-one cable connection method between components within the charging station, which has the problem of having many limitations in terms of space utilization.

[0007] The objective of the present invention to solve the above-mentioned problems is to provide a power transmission device having a busbar-type power transmission structure.

[0008] Another objective of the present invention to solve the above-mentioned problems is to provide a charging device including the power transfer device.

[0009] A power transfer device according to one embodiment of the present invention for achieving the above objective comprises one or more busbar pairs including a positive busbar and a negative busbar; and a connection portion capable of being connected to one or more power-requiring devices, wherein the busbar pair is formed along at least a portion of the upper corners inside a device on which the power transfer device is installed.

[0010] The above busbar pair can be connected to a power conversion device that converts AC (Alternating Current) power input from the grid into DC (Direct Current) power and supplies it to the power transmission device.

[0011] The above connection may include a pair of first connection terminals and a pair of second connection terminals having an inwardly curved shape.

[0012] Each of the above pair of first connection terminals and the pair of second connection terminals can be electrically connected to the positive terminal or negative terminal of the power-requiring device inserted between the pair of connection terminals.

[0013] The above one or more busbar pairs may be supported by one or more support insulators disposed on the bottom surface of each busbar.

[0014] The above power-requiring device may include one or more of the above power conversion device, energy storage device, and charger.

[0015] The power transmission device further includes a first space portion accommodating the busbar pair and the support insulator; and a second space portion accommodating a communication cable, wherein the first space portion and the second space portion may be partitioned by a partition made of insulating material.

[0016]

[0017] An electric vehicle charging device according to one embodiment of the present invention for achieving the above other purpose is an electric vehicle charging device comprising one or more chargers that receive power through a power transfer device, wherein the power transfer device comprises one or more busbar pairs including a positive busbar and a negative busbar; and a connection portion capable of being connected to one or more power-requiring devices, and wherein the busbar pair is formed along at least a portion of the inner upper corners of the electric vehicle charging device.

[0018] The electric vehicle charging device may further include an energy storage device (ESS) that stores power delivered through the power transmission device; and a charge / discharge control unit connected to the energy storage device and the one or more chargers, which controls the charging and discharging of the energy storage device and the supply of power to the one or more chargers.

[0019] The above charge / discharge control unit receives a charge request using one or more chargers and can provide power supplied from one or more of the grid and the energy storage device to a charger corresponding to the charge request.

[0020] The above charge / discharge control unit can charge the energy storage device using power provided from the grid according to preset conditions.

[0021] The electric vehicle charging device may further include a power conversion device that converts AC (Alternating Current) power input from the grid into DC (Direct Current) power and supplies it to the power delivery device.

[0022] The above connection may include a pair of first connection terminals and a pair of second connection terminals having an inwardly curved shape.

[0023] Each of the above pair of first connection terminals and the pair of second connection terminals can be electrically connected to the positive terminal or negative terminal of the power-requiring device inserted between the pair of connection terminals.

[0024] The above one or more busbar pairs may be supported by one or more support insulators disposed on the bottom surface of each busbar.

[0025] The above power-requiring device may include one or more of the above power conversion device, energy storage device, and charger.

[0026] The power transmission device further includes a first space portion accommodating the busbar pair and the support insulator; and a second space portion accommodating a communication cable, wherein the first space portion and the second space portion may be partitioned by a partition made of insulating material.

[0027] The above power transmission device and the above electric vehicle charging device can be configured in the form of an integrated container.

[0028] The embodiment of the present invention as described above provides a busbar-integrated container-type charging device, which simplifies the connection structure between components and resolves the problems associated with cable connection methods, thereby enabling the simplification of management tasks.

[0029] In addition, by configuring the system based on DC, the number of required components can be reduced, and the available energy can be maximized by adding energy storage devices in the space freed up as a result.

[0030] Figure 1 is a conceptual diagram of a typical electric vehicle charging infrastructure.

[0031] Figure 2 is a diagram showing the configuration of an on / off board charging system for an electric vehicle.

[0032] Figure 3 is a block diagram of an AC-based cable-connected container-type electric vehicle charging station.

[0033] FIG. 4 is a block diagram of a DC-based busbar-connected container-type electric vehicle charging device according to an embodiment of the present invention.

[0034] FIG. 5 is a cross-sectional view of a power transfer device according to an embodiment of the present invention.

[0035] FIG. 6 is a top view of a power transfer device busbar according to an embodiment of the present invention.

[0036] FIG. 7 is a cross-sectional view of a busbar connection portion of a power transmission device according to an embodiment of the present invention.

[0037] FIG. 8 is a block diagram of an electric vehicle charging device according to another embodiment of the present invention.

[0038] 400: Electric vehicle charging device

[0039] 410: Power converter (SST)

[0040] 420: Energy storage device

[0041] 440: Electric vehicle charger

[0042] 450: Power transmission device

[0043] 451: Busbar conductor

[0044] 452: Supporter

[0045] 460: Busbar connection

[0046] 461: First connection terminal

[0047] 462: Second connection terminal

[0048] The present invention is susceptible to various modifications and may have various embodiments; specific embodiments are illustrated in the drawings and described in detail in the detailed description. However, this is not intended to limit the invention to specific embodiments, and it should be understood that the invention includes all modifications, equivalents, and substitutions that fall within the spirit and scope of the invention. Similar reference numerals have been used for similar components in the description of each drawing.

[0049] Terms such as first, second, A, B, etc., may be used to describe various components, but said components should not be limited by said terms. These terms are used solely for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, the first component may be named the second component, and similarly, the second component may be named the first component. The term "and / or" includes a combination of a plurality of related described items or any of a plurality of related described items.

[0050] When it is stated that one component is "connected" or "connected" to another component, it should be understood that while it may be directly connected or connected to that other component, there may also be other components in between. On the other hand, when it is stated that one component is "directly connected" or "directly connected" to another component, it should be understood that there are no other components in between.

[0051] The terms used in this application are used merely to describe specific embodiments and are not intended to limit the invention. The singular expression includes the plural expression unless the context clearly indicates otherwise. In this application, terms such as "comprising" or "having" are intended to specify the existence of the features, numbers, steps, actions, components, parts, or combinations thereof described in the specification, and should be understood as not precluding the existence or addition of one or more other features, numbers, steps, actions, components, parts, or combinations thereof.

[0052] Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as generally understood by those skilled in the art to which the present invention pertains. Terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with their meaning in the context of the relevant technology, and should not be interpreted in an ideal or overly formal sense unless explicitly defined in this application.

[0053]

[0054] Hereinafter, preferred embodiments according to the present invention will be described in detail with reference to the attached drawings.

[0055]

[0056] Figure 1 is a conceptual diagram of a typical electric vehicle charging infrastructure.

[0057] The charging infrastructure for electric vehicles is a system for using electric vehicle charging cheaply and conveniently in the parking lot of an apartment or public facility, and is a general term for the hardware and software related to the charging of electric vehicle batteries. Referring to FIG. 1, the charging infrastructure can generally be configured to include a power supply facility (10), a charger (20), a charging interface (30), and an information system (40).

[0058] The power supply facility (10) is an electrical facility for supplying power to a charger and may include power transmission and distribution infrastructure, a power meter, wiring, a distribution board, and a circuit breaker. The charger (20) is a facility equipped with a user interface that receives power and provides AC or DC electricity to an electric vehicle.

[0059] Meanwhile, EV charging methods can be broadly classified into direct charging, contactless charging, and battery swapping. Direct charging involves supplying energy via AC or DC by connecting a plug to the electric vehicle. Battery swapping is a method where charging infrastructure operators purchase batteries and either lease them to users or operate them directly, utilizing an automated exchange system at a battery swap station. Contactless charging charges the battery by transmitting power via magnetic induction or resonance from a transmitting pad—a high-frequency power supply device embedded in the parking space floor—to a receiving pad mounted on the electric vehicle.

[0060] Chargers (20) that use a direct charging method are classified into on-board chargers and off-board chargers depending on whether they are installed in the electric vehicle, and can be classified into home, standard, and quick chargers depending on the purpose of use. On-board chargers have the advantage of being installed inside the electric vehicle so that charging can be done anywhere there is power, but power capacity is limited due to the weight of the charger and installation space constraints. On the other hand, off-board chargers have no limitations on power capacity or installation space.

[0061] Fast chargers supply the necessary power to the battery installed in the vehicle by converting AC power from KEPCO into DC or converting DC power from renewable energy into DC / DC, and the charging speed is fast because the rectifier and DC / DC converter are separated from the external charging system. Slow chargers (charging stand in Fig. 1) require a power conversion process because the rectifier and DC / DC converter are built into the vehicle (On Board Charger), and the charging speed is slow because the vehicle is structurally capable of only small-capacity conversion.

[0062] Meanwhile, the charging interface (30) is a device that connects power and communication to an electric vehicle, such as a cable, plug, and wireless transceiver pad, which connects the charger and the electric vehicle. Here, the plug is a charging connector that is inserted into the charging socket of a charging station and is also called an infrastructure charging plug. In addition, the connector is a charging connector that is inserted into the charging inlet of an electric vehicle and is also called a vehicle charging connector. The inlet of an electric vehicle is the charging socket of an electric vehicle into which the vehicle charging connector is inserted and is also called a vehicle charging inlet.

[0063] Additionally, the charging infrastructure information system (40) is an information system for providing users with information on the type, status, location, and usage of chargers, and for the overall operation and management of the charging infrastructure, including operation control of chargers, user management and information provision, billing, and payment. The charging infrastructure information system (40) may include a central management server located on a wired or wireless network and one or more local servers.

[0064] The form of the charging infrastructure for electric vehicles shown in Fig. 1 is the most common form, and the charging infrastructure can be provided in various modified forms depending on the type of vehicle requiring charging and the characteristics of the location where the charger is located.

[0065]

[0066] Figure 2 is a diagram showing the configuration of an on / off board charging system for an electric vehicle.

[0067] Electric vehicles can be classified into HEV (Hybrid Electric Vehicle), PHEV (Plug-in Hybrid Vehicle), EV (Electric Vehicle), FCEV (Fuel Cell Electric Vehicle), etc., depending on the type of power source used and the type of battery.

[0068] HEV (Hybrid Electric Vehicle) is a general term for automobiles that use two types of power, typically utilizing both a conventional engine and electric energy from a battery. Unlike HEVs, PHEVs (Plug-in Hybrid Vehicles) charge their batteries externally; the battery plays the primary role in both starting and driving, with the engine acting as a backup only when the battery is discharged. EVs (Electric Vehicles) are electric vehicles that have enhanced battery capacity compared to PHEVs and have had their engines removed. FCEVs (Fuel Cell Electric Vehicles) are characterized by having their primary power source in a fuel cell that generates electrical energy internally, rather than an externally charged battery.

[0069] The battery used in the electric vehicle (50) must satisfy the conditions of high energy density to increase the vehicle's driving range and the ability to be fully discharged more than a certain number of times. Nickel-hydrogen (Ni-MH) batteries and lithium polymer-based batteries, which have sufficient power density and reasonable charge / discharge energy efficiency, are mainly used as batteries for electric vehicles. The battery is typically mounted in the vehicle in the form of a battery pack (51) that includes a battery module and a Battery Management System (BMS).

[0070] The BMS manages driving range prediction, full charging, overcharge prevention, and cell-to-cell equalization algorithms. The BMS may also include fault management of battery cells or modules and battery replacement notification functions through battery life prediction. To perform these operations, the BMS includes various components such as fuses, current sensing elements, thermistors, switches, and balancers to monitor the current, voltage, and temperature of battery cells or modules.

[0071] The battery pack (51) can drive the vehicle by supplying power to the electric motor through an inverter (or AC / DC converter) equipped in the vehicle. The BMS of the battery pack can communicate with the ECU and VCU within the vehicle body using a communication method such as the CAN protocol. The BMS reports information related to the battery status to the vehicle and can control the connection status between the vehicle and the battery according to the vehicle's operation information. When the operation of the vehicle ends, the BMS receives a vehicle operation termination signal from the vehicle's ECU or VCU and can stop the power supply that was being delivered from the battery module to the vehicle.

[0072] For the operation of such a vehicle, control operations such as motor drive control, regenerative braking control, air conditioning load control, and electrical load power (12V) supply control are required. A vehicle may include several Electronic Control Units (ECUs) for these control operations, and among the various ECUs, the highest-level controller responsible for overall operation and control within the vehicle may be called a Vehicle Control Unit (VCU).

[0073] Meanwhile, multiple ECUs included in a vehicle can communicate with each other via the CAN bus. CAN (Controller Area Network) is a standard communication protocol designed for microcontrollers or devices to communicate with each other within a vehicle without a host computer. As a non-host bus-based message-based network protocol primarily used for communication between controllers, CAN is mainly utilized in vehicles.

[0074] Referring to Fig. 2, chargers are classified into on-board chargers and off-board chargers depending on whether they are installed in an electric vehicle, and are further classified into Home, Standard, and Quick based on their purpose of use. On-board chargers include standard chargers and home chargers. Quick chargers are off-board chargers with a power level of 50 kW or higher, and are primarily used to supplement insufficient power for a short period of time at electric vehicle charging stations.

[0075] Meanwhile, the onboard charger (52) installed inside the electric vehicle is configured to include an AC / DC converter, a power flow controller (PFC), and a DC / DC converter, and can convert AC power supplied from the grid or a corresponding power supply device into DC power of an appropriate level and output it. The onboard charger (52) can supply power by connecting to a DC / DC converter connected to a battery pack via a DC bus, an AC / DC converter connected to an electric motor, and a DC / DC converter connected to electrical equipment.

[0076]

[0077] Figure 3 is a block diagram of an AC-based cable-connected container-type electric vehicle charging station.

[0078] Energy Storage Systems (ESS) installed to ensure a stable power supply for electric vehicle charging stations are primarily installed in limited areas such as densely populated urban areas or highways. Therefore, minimizing the installation area and maximizing available energy are critical factors in securing the business viability of charging services using energy storage systems. For this reason, when energy storage systems are applied to electric vehicle charging stations, they are sometimes provided in a container type as shown in Fig. 3.

[0079] Referring to FIG. 3, an AC-based cable-connected container-type electric vehicle charging station is configured to include a power converter (310), an ESS (320), a power bank (330), and a fast charger (340). In this structure, AC power supplied from the grid is input to the power converter (310) via an overcurrent protection panel.

[0080] The power converter (310) reduces the voltage of electrical energy received from the power grid. For example, the power converter (310) receives 22.9 kV of electricity and reduces it to 380 V. The power output from the power converter (310) may be stored in the ESS (320) or supplied to the charger (340) via the power bank (330) responsible for power distribution. Here, the power bank (330) is responsible for voltage and current transformation functions for power distribution to the fast charger. Meanwhile, the ESS (320) can store energy supplied from the power grid. To this end, the ESS (320) may be configured to include a Power Conversion System (PCS) that converts AC-based power into DC power.

[0081] In other words, AC-based cable-connected container-type electric vehicle charging stations use a method where power supplied from the AC grid is fed to a DC fast charger, and the power received from the DC fast charger is converted from AC to DC to charge the electric vehicle battery.

[0082] These container-type electric vehicle charging stations have many limitations in terms of space utilization. Specifically, each component within the charging station is connected via a one-to-one cable connection; consequently, as the number of components and installation capacity increase, the number and thickness of the cables also increase. In this case, it is necessary to design the layout of components considering the appropriate radius of curvature based on the number and thickness of the cables, and an appropriate spacing distance is required accordingly. Therefore, limitations in efficient space utilization and layout configuration are inevitable.

[0083]

[0084] To solve these problems, the present invention provides a busbar-integrated container-type charging device to resolve the issues of cable connection methods and to maximize usable energy by configuring the system based on DC.

[0085]

[0086] FIG. 4 is a block diagram of a DC-based busbar-connected container-type electric vehicle charging device according to one embodiment of the present invention.

[0087] A DC-based busbar-connected container-type electric vehicle charging device (400) according to an embodiment of the present invention is a device that provides electric vehicle charging services using a power transmission device (450) installed on the upper surface of a container. At this time, the power transmission device (450) may be provided in the form of a busbar. The power transmission device (450) may be installed along at least a portion of the upper inner corners of the container and may be formed integrally with the container.

[0088] In the present invention, the power transfer device (450) can transfer DC power to an energy storage device (420) or one or more electric vehicle chargers (440) through a power conversion device (e.g., SST: Solid State Transformer) (410) that converts and supplies AC power supplied from the grid (100).

[0089] As will be seen later, the power transfer device (450) may be provided in the form of a busbar pair (pair) including a positive busbar and a negative busbar, and may be configured to include a connection part (460) of a structure capable of being connected to one or more power-requiring devices. The power transfer device (450) may be formed along at least a portion of the upper corner inside the device (e.g., the container in FIG. 4; electric vehicle charging device) on which the power transfer device (450) is installed, as shown in FIG. 4.

[0090] Meanwhile, the power delivery device (450) can deliver power to one or more power-requiring devices through the connection part (460). Here, the power-requiring devices may include one or more of a Solid State Transformer (SST), an Energy Storage System (ESS), and an Electric Vehicle Charger.

[0091] In an embodiment of the present invention, the power conversion device can convert AC (Alternating Current) power input from the grid into DC power and supply it to the busbar. The power conversion device (410) may also change the voltage of the power input from the grid and supply it as needed.

[0092] Here, the SST, which can be used as an example of a power conversion device, replaces conventional passive low-frequency transformers with power conversion devices utilizing power electronics technology. It is a device capable of reducing size and weight, compensating for reactive power, and performing Uninterruptible Power Supply (UPS) functions using energy storage. The SST is capable of operating at high voltage levels and is isolated using intermediate or high-frequency transformers. The SST can perform AC / DC or DC / AC conversion.

[0093] Meanwhile, in this embodiment, the ESS (420), which performs the role of storing energy supplied from the grid, can be understood as a concept including a battery rack comprising a plurality of battery packs, or a battery bank comprising a plurality of battery racks. That is, in this embodiment, the ESS (100) can be described as a large battery capable of storing energy supplied from the grid and supplying it to one or more electric vehicle chargers (440). Here, a battery pack may also be referred to as a battery module. Additionally, a Battery Management System (BMS) may be installed in each battery rack or bank. Here, the battery management system can monitor the current, voltage, and temperature of each battery pack, rack, or bank.

[0094] Additionally, the electric vehicle charger (440) can receive DC power delivered through the power delivery device (450) to charge the electric vehicle that needs it. Here, the electric vehicle charger (440) may take the form of a DC / DC converter. Furthermore, the electric vehicle can be charged by converting and supplying DC power supplied through the busbar (450) from one or more charging sources, such as grid supply power and power stored in the ESS, to an appropriate level for the electric vehicle.

[0095] In summary, an electric vehicle charging device (400) according to an embodiment of the present invention is an electric vehicle charging device comprising one or more chargers that receive power through a power transfer device, wherein the power transfer device comprises one or more busbar pairs including a positive busbar and a negative busbar; and a connection portion capable of being connected to one or more power-requiring devices, and wherein the busbar pair is formed along at least a portion of the upper inner corner of the electric vehicle charging device.

[0096] The electric vehicle charging device may further include a power conversion device that converts AC (Alternating Current) power input from the grid into DC (Direct Current) power and supplies it to the power transmission device; and an energy storage device (ESS) that stores power transmitted through the power transmission device.

[0097] The above connection may include a pair of first connection terminals and a pair of second connection terminals having an inwardly curved shape.

[0098] Each of the above pair of first connection terminals and the pair of second connection terminals can be electrically connected to the positive terminal or negative terminal of the power-requiring device inserted between the pair of connection terminals.

[0099] The above one or more busbar pairs may be supported by one or more support insulators disposed on the bottom surface of each busbar.

[0100] The above power-requiring device may include one or more of the above power conversion device, energy storage device, and charger.

[0101] The power transmission device further includes a first space portion accommodating the busbar pair and the support insulator; and a second space portion accommodating a communication cable, wherein the first space portion and the second space portion may be partitioned by a partition made of insulating material.

[0102] The above power transmission device and the above electric vehicle charging device can be configured in the form of an integrated container.

[0103] Meanwhile, although not illustrated in this embodiment, the electric vehicle charging device (400) may further include a processor for managing and controlling an SST (410), an ESS (420), and one or more chargers (440), a communication module for communicating with an external network, memory, etc.

[0104]

[0105] FIG. 5 is a cross-sectional view of a power transfer device according to an embodiment of the present invention.

[0106] A power transfer device (450) according to an embodiment of the present invention may be configured to include one or more busbar pairs comprising a positive busbar and a negative busbar; and a connection portion capable of being connected to one or more power-requiring devices. Here, the busbar pair may be formed along at least a portion of the upper corners inside a device (electric vehicle charging device) on which the power transfer device is installed, and may be formed integrally with said device. The busbar pair may be provided as a conductor portion to transfer power over the busbar.

[0107] Referring to FIG. 5, a power transmission device (450) according to an embodiment of the present invention may be configured to include a first space (401) that accommodates a busbar conductor (451); and a second space (402) that accommodates a communication cable. At this time, the first space and the second space may be partitioned by a partition made of an insulating material.

[0108] The first space (401) can accommodate a busbar conductor (451) including a positive busbar and a negative busbar. The first space (401) can also accommodate a support insulator (452) located on the bottom surface of each busbar to support the busbar conductor (451). According to one embodiment, a single support insulator (452) may be implemented in a form that supports a pair of busbars, i.e., a busbar pair. Here, the busbar pair may be connected through a connection to a power conversion device that converts AC (Alternating Current) power input from the grid into DC (Direct Current) power and supplies it to a power transmission device.

[0109] Meanwhile, a portion of the bottom surface of the first space (401) may be configured to include a structure, for example, a through hole, that allows a branch portion branching off to connect the busbar to a power-requiring device to be connected to a connection portion (460). Additionally, the second space (402) may accommodate a communication cable (455) for various devices housed within a device in which the power transmission device is installed.

[0110]

[0111] FIG. 6 is a top view of a power transfer device busbar according to an embodiment of the present invention.

[0112] FIG. 6 is a top view of a container-type electric vehicle charging device. The power transmission device (450) according to an embodiment of the present invention can be branched through a connection part to match the location of the components (power-requiring devices) of the electric vehicle charging device. The connection part (460) can be movably positioned along the busbar body part and can be provided in a structure that can be fixed at a certain position set by the user. The busbar conductor part (451) can be supported by a support insulator (452), and according to one embodiment, a single support insulator (452) can be implemented in a form that supports a pair of busbars, i.e., a busbar pair.

[0113] Here, the components of the electric vehicle charging device connected to the busbar conductor may include one or more of an SST, an energy storage device, and an electric vehicle charger. That is, the busbar conductor may be connected to an SST, an energy storage device, or an electric vehicle charger through a connection part.

[0114]

[0115] FIG. 7 is a cross-sectional view of a busbar connection portion according to an embodiment of the present invention.

[0116] Referring to FIG. 7, the connecting portion (460) may be configured to branch out and protrude from the body portion of the power transmission device (450). The busbar connecting portion (460) may be provided in a structure that can be moved along the busbar body portion and fixedly installed at a certain position set by the user.

[0117] Here, the busbar connection portion (460) may include a pair of first connection terminals (461) with an inwardly curved shape and a pair of second connection terminals (462) with an inwardly curved shape. A pair of first connection terminals or a pair of second connection terminals may be electrically connected to a positive terminal or a negative terminal of a power-requiring device inserted between the pair of connection terminals. For example, a pair of first connection terminals may be connected to a positive terminal of a power-requiring device, and a pair of second connection terminals may be connected to a negative terminal of a power-requiring device. Through the first connection terminals (461) and second connection terminals (462) having an inwardly curved shape, a connection between the busbar connection portion and the power-requiring device can be more easily implemented without a separate device (e.g., a bolt).

[0118] At this time, the power-requiring device may be a Solid State Transformer (SST) as shown in Fig. 7, an Energy Storage System (ESS), or an Electric Vehicle Charger.

[0119]

[0120] FIG. 8 is a block diagram of an electric vehicle charging device according to another embodiment of the present invention.

[0121] As previously described, the electric vehicle charging device (400) may be configured to include one or more busbar pairs comprising a positive busbar and a negative busbar; and a power transfer device (450) comprising a connection portion capable of being connected to one or more power-requiring devices. Here, the busbar pair is characterized by being formed along at least a portion of the inner top corners of the electric vehicle charging device.

[0122] Here, the power transfer device (450) can transfer DC power to an energy storage device (420) or one or more electric vehicle chargers (440) through a power conversion device (410) that converts and supplies AC power supplied from the grid (100).

[0123] Referring to FIG. 8, the electric vehicle charging device (400) may further include a power conversion device (410), an energy storage device (420), and one or more chargers (440) connected to and managing and controlling them, a charging / discharging control unit (470), a communication unit (471) for communicating with an external network, a storage unit (472), an input interface (not shown), an output interface (not shown), etc. Each component included in the electric vehicle charging device (400) may be connected via a bus, etc., to communicate with each other.

[0124] Here, the energy storage device (420) can store power delivered through a power delivery device. The charge / discharge control unit (470) is connected to the energy storage device and one or more chargers and can control the charging / discharging of the energy storage device and the supply of power to one or more chargers.

[0125] More specifically, the charge / discharge control unit (470) can charge the energy storage device using power provided from the grid according to preset conditions. That is, the charge / discharge control unit (470) can charge the energy storage device (420) by supplying grid power supplied through the power conversion device (410) and the power transmission device (450) to the energy storage device (420). For example, the charge / discharge control unit (470) can charge the energy storage device (420) using grid power during times when electricity rates are low, such as late-night hours.

[0126] The charge / discharge control unit (470) can also receive a charge request using one or more chargers and provide power supplied from one or more of the grid and energy storage devices to the charger corresponding to the charge request.

[0127] More specifically, the charge / discharge control unit (470) can charge one or more electric vehicles requesting charging by directly supplying power supplied from the grid to the electric vehicle charger when grid power is available.

[0128] The charging / discharging control unit (470) can also receive charging requests from multiple electric vehicle users, and if the grid power alone cannot satisfy user requirements (requested charging amount, requested charging time, etc.), it can provide power supplied from the grid in real time, as well as power stored in the energy storage device (420), to the electric vehicle charger (440). The charging / discharging control unit (470) can also provide power stored in the energy storage device (420) to the electric vehicle charger (440) for which a usage request has been received, even in emergency situations such as a power outage where grid power cannot be used.

[0129] Meanwhile, the charge / discharge control unit (470) may refer to a central processing unit (CPU), a graphics processing unit (GPU), or a dedicated processor on which methods according to embodiments of the present invention are performed. Additionally, the storage unit (472) may be composed of at least one of a volatile storage medium and a non-volatile storage medium. For example, the storage unit (472) may be composed of at least one of a read-only memory (ROM) and a random access memory (RAM).

[0130] The communication unit (471) is equipped with a module capable of communicating in various communication methods such as wired communication, short-range communication, and cellular communication, and can communicate with an external device, such as a server within a network that manages multiple electric vehicle charging devices (400).

[0131]

[0132] The embodiments of the present invention described above provide a busbar-integrated container-type charging device, which simplifies the connection structure between components and resolves the problems associated with cable connection methods, thereby enabling the simplification of management tasks.

[0133] In addition, by configuring the system based on DC, the number of required components can be reduced, and the available energy can be maximized by adding energy storage devices in the space freed up as a result.

[0134] Furthermore, by equipping an energy storage device that is efficiently charged through a power transmission device with a simple structure, it is possible to smoothly supply power to electric vehicles requesting charging by utilizing not only grid power but also power stored in the energy storage device during peak power demand.

[0135]

[0136] Some aspects of the invention have been described in the context of a device, but may also be described according to a corresponding method, wherein a block or device corresponds to a method step or a feature of a method step. Similarly, aspects described in the context of a method may also be described according to a corresponding block or item or a feature of a corresponding device. Some or all of the method steps may be performed by (or using) a hardware device, such as, for example, a microprocessor, a programmable computer, or an electronic circuit. In some embodiments, one or more of the most important method steps may be performed by such a device.

[0137] Although the present invention has been described with reference to preferred embodiments, those skilled in the art will understand that various modifications and changes can be made to the invention without departing from the spirit and scope of the invention as described in the following claims.

Claims

1. One or more busbar pairs including a positive busbar and a negative busbar; and It includes a connection portion capable of connecting to one or more power-requiring devices, and The above busbar pair is a power transmission device formed along at least a portion of the upper corners inside the device where the power transmission device is installed.

2. In Claim 1, The above busbar pair is, A power transmission device connected to a power conversion device that converts AC (Alternating Current) power input from a grid into DC (Direct Current) power and supplies it to the power transmission device.

3. In Claim 1, The above connecting part is, A power transfer device comprising a pair of first connection terminals and a pair of second connection terminals having an inwardly curved shape.

4. In Claim 3, Each of the above pair of first connection terminals and pair of second connection terminals is, A power transfer device electrically connected to the positive or negative terminal of the power-requiring device inserted between a pair of connection terminals.

5. In Claim 1, A power transmission device in which one or more busbar pairs are supported by one or more support insulators disposed on the bottom surface of each busbar.

6. In Claim 1, The above power-requiring device is, A power transfer device comprising one or more of the above-mentioned power conversion device, energy storage device, and charger.

7. In Claim 5, A first space portion accommodating the above busbar pair and the above support insulator; and It further includes a second space portion for accommodating a communication cable, and A power transmission device in which the first space and the second space are partitioned by a partition made of insulating material.

8. Power transfer device; and An electric vehicle charging device comprising one or more chargers that receive power through the above-mentioned power transmission device, The above power transfer device is, One or more busbar pairs including a positive busbar and a negative busbar; and It includes a connection portion capable of connecting to one or more power-requiring devices, and The above busbar pair is formed along at least a portion of the inner top corners of the electric vehicle charging device.

9. In Claim 8, An energy storage device (ESS) that stores power transmitted through the above-mentioned power transmission device; and An electric vehicle charging device further comprising a charge / discharge control unit connected to the energy storage device and the one or more chargers, controlling the charge / discharge of the energy storage device and the power supply to the one or more chargers.

10. In Claim 9, The above charge / discharge control unit is, An electric vehicle charging device that receives a charging request using one or more of the above chargers and provides power supplied from one or more of the grid and the energy storage device to a charger corresponding to the charging request.

11. In Claim 9, The above charge / discharge control unit is, An electric vehicle charging device that charges the energy storage device using power provided from the grid according to preset conditions.

12. In Claim 9, An electric vehicle charging device further comprising a power conversion device that converts AC (Alternating Current) power input from a grid into DC (Direct Current) power and supplies it to the power transmission device.

13. In claim 8, The above connecting part is, An electric vehicle charging device comprising a pair of first connecting terminals and a pair of second connecting terminals having an inwardly curved shape.

14. In Claim 13, Each of the above pair of first connection terminals and pair of second connection terminals is, An electric vehicle charging device that is electrically connected to the positive or negative terminal of the power-requiring device inserted between a pair of connection terminals.

15. In Claim 8, An electric vehicle charging device, wherein the above one or more busbar pairs are supported by one or more support insulators disposed on the bottom surface of each busbar.

16. In Claim 8, The above power-requiring device is, An electric vehicle charging device comprising one or more of a power conversion device, an energy storage device, and the charger.

17. In Claim 8, The above power transfer device is, A first space portion accommodating the above busbar pair and a support insulator supporting the above busbar pair; and It further includes a second space portion for accommodating a communication cable, and An electric vehicle charging device in which the first space and the second space are partitioned by a partition made of insulating material.

18. In Claim 8, An electric vehicle charging device in which the power transmission device and the electric vehicle charging device are configured in the form of an integrated container.

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