A power supply system, a data center and a charging device

Abstract

A power supply system, a data center and a charging device relate to the field of electronic power. The power supply system comprises a centralized controller (10) and three power modules (11), one power module (11) is connected to each phase of alternating current power supply, and the input end of each power module (11) is connected to one phase of alternating current power supply. Wherein, each power module (11) comprises a low-voltage controller (30) and at least two power units (20); each power unit (20) comprises a unit controller (201); the centralized controller (10) and each low-voltage controller (30) are connected by bus; the centralized controller (10) sends control signals to each unit controller (201) through each low-voltage controller (30), which is used for controlling the unit controller (201) and / or the power conversion circuit (210). The power supply system can realize hot plug of the power module (11) and improve the reliability of on-site operation.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of power electronics, and particularly relates to a power supply system, a data center and a charging device. BACKGROUND

[0002] The power supply system can convert unstable AC input into stable DC output or AC output provided to a load device, and is therefore very important in a power system. Among them, the medium and high voltage power supply system is widely used in the scenes of data centers, electric vehicle charging piles and the like.

[0003] The medium and high voltage power supply system usually refers to a power supply system with an input or output voltage of 1kV or above. The input end of the medium and high voltage power supply system is connected to three-phase AC power, and each phase of the three-phase AC power is connected to a power module. Each power module includes a plurality of power units, and each power unit includes a unit controller and a power conversion circuit. The existing medium and high voltage power supply system usually adopts a two-layer control architecture. The first layer is a centralized controller, which is used to coordinate the work of each component in the system. The second layer is a unit controller, which is used to control the working state of the power conversion circuit. The centralized controller and all unit controllers adopt optical fiber communication.

[0004] However, the optical fiber interface used to realize optical fiber communication cannot realize hot plugging on the backboard, so the power module does not support hot plugging, and a separate optical fiber installation step is required for the installation and maintenance of the power unit, which reduces the reliability during on-site installation and maintenance. SUMMARY

[0005] The present application provides a power supply system, a data center and a charging device, which can realize hot plugging of the power module and improve the reliability during on-site installation and maintenance.

[0006] In a first aspect, the present application provides a power supply system, which is externally connected to a three-phase AC power supply. The power supply system includes a centralized controller and three power modules. Each phase of the AC power supply is connected to a power module. The input end of each power module is connected to one phase of the AC power supply. Each power module includes a low-voltage controller and at least two power units. Each power unit includes a unit controller and a power conversion circuit. The centralized controller is connected to each low-voltage controller through a bus. The centralized controller sends control signals to each unit controller through each low-voltage controller, which are used to control the unit controller and / or the power conversion circuit.

[0007] Since the bus connection is adopted between the centralized controller and the low-voltage controllers of the power modules, each power module supports hot plugging. The optical fiber interface requiring high-reliability connection is arranged in the power module, and the power module can be installed and tested in the factory, and the independent optical fiber installation step is no longer required during installation and maintenance in the field, thereby improving the reliability of field operation. In addition, with the evolution of power devices, the number of power units can change, for example, the number of power units can be reduced, and the power supply system can maintain the system architecture unchanged and the interface of the power module unchanged when the number of power units changes, thereby reducing the difficulty of system modification.

[0008] With reference to the first aspect, in a first possible implementation, the backplane of the power supply system is provided with a first hot-plugging interface. The power module is provided with a second hot-plugging interface corresponding to the first hot-plugging interface. The low-voltage controller in the power module is connected to the centralized controller by a bus, so that the power module supports hot plugging, and thus the power module can be hot-plugged through the second hot-plugging interface and the first hot-plugging interface.

[0009] With reference to the first aspect, in a second possible implementation, the bus is an RS-485 bus or a controller area network (CAN) bus, so that each power module supports hot plugging.

[0010] With reference to the first aspect, in a third possible implementation, inside each power module, the low-voltage controller is connected to each unit controller by optical fiber communication, which can improve the bandwidth between the low-voltage controller and the unit controller, reduce the communication delay, and provide isolation required by safety regulations.

[0011] With reference to the first aspect, in a fourth possible implementation, the centralized controller sends a first control signal to each unit controller of the i-th phase through the low-voltage controller of the i-th phase of the three-phase alternating current power supply, so that each unit controller of the i-th phase controls the output load balancing of the corresponding power conversion circuit, where i=1, 2, 3.

[0012] With reference to the first aspect, in a fifth possible implementation, the low-voltage controller of the i-th phase of the three-phase alternating current power supply is further configured to acquire an output end sampling signal of each power conversion circuit of the i-th phase, determine a second control signal corresponding to each power conversion circuit of the i-th phase by using the output end sampling signal, and send the corresponding second control signal to each unit controller of the i-th phase. Each unit controller of the i-th phase controls the working state of the power conversion circuit in the power unit by using the first control signal and the second control signal.

[0013] The output end sampling signal can be a voltage signal or a current signal, and the second control signal can be the output end sampling signal or a signal processed based on the output end sampling signal.

[0014] With reference to the first aspect, in a sixth possible implementation manner, the power supply system is configured to output direct current, each power conversion circuit comprises an AC / DC circuit and a DC / DC circuit, and an output end of the AC / DC circuit is connected to an input end of the DC / DC circuit. The AC input ends of the AC / DC circuits of the i-th phase are connected in series to form a first end connected to the i-th phase AC power supply, the AC input ends of the AC / DC circuits of the i-th phase are connected in series to form a second end connected to a neutral point of the three-phase AC power supply, and the output ends of all the DC / DC circuits are connected in parallel to the output end of the power supply system. The AC / DC circuit is configured to convert the AC power into DC power and transmit the DC power to the DC / DC circuit, and the DC / DC circuit is configured to convert the obtained DC power and output the converted DC power.

[0015] With reference to the first aspect, in a seventh possible implementation manner, the power supply system is configured to output alternating current, each power conversion circuit comprises an AC / DC circuit and a DC / AC circuit, and an output end of the AC / DC circuit is connected to an input end of the DC / AC circuit. The output ends of all the DC / AC circuits are connected in parallel to the output end of the power supply system. The AC / DC circuit is configured to convert the AC power into DC power and transmit the DC power to the DC / AC circuit, and the DC / AC circuit is configured to convert the obtained DC power into AC power and output the converted AC power.

[0016] With reference to the first aspect, in an eighth possible implementation manner, the centralized controller is further configured to sample input voltages and input currents of all the power modules, and the unit controller is further configured to sample output voltages of the AC / DC circuit in the power unit, so that the power supply system controls each AC / DC circuit by using the sampling results of the input voltages and input currents of the power supply system and the sampling result of the output DC voltage, to perform power factor correction (PFC).

[0017] The second aspect of the present application further provides a data center comprising the power supply system provided in any possible implementation manner, and further comprising a load device. The power supply system is configured to supply power to the load device. The load device can be a network switch, a server cluster, a storage device, a monitoring device, a heat dissipation device, etc.

[0018] The third aspect of the present application further provides a charging device comprising the power supply system provided in any possible implementation manner, and the charging device is configured to charge an electric vehicle by using the electric energy provided by the power supply system.

[0019] With reference to the third aspect, in a first possible implementation manner, the charging device is a charging pile, and the power supply system is configured to supply power to the charging pile, and the charging pile is configured to charge the electric vehicle.

[0020] With reference to the third aspect, in a second possible implementation manner, the charging device comprises a wireless charging transmitting end, the wireless charging transmitting end being configured to provide electric energy for a wireless charging receiving end located on the electric vehicle, and the wireless charging receiving end being configured to charge a power battery pack on the electric vehicle. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 a schematic diagram of a medium-high voltage power supply system in the prior art;

[0022] Figure 2 a schematic diagram of a power supply system provided by an embodiment of the present application;

[0023] Figure 3 a schematic diagram of another power supply system provided by an embodiment of the present application;

[0024] Figure 4 a schematic diagram of still another power supply system provided by an embodiment of the present application;

[0025] Figure 5 a schematic diagram of a power conversion circuit provided by an embodiment of the present application;

[0026] Figure 6 a schematic diagram of still another power supply system provided by an embodiment of the present application;

[0027] Figure 7 a schematic diagram of still another data center provided by an embodiment of the present application;

[0028] Figure 8 a schematic diagram of a charging pile provided by an embodiment of the present application;

[0029] Figure 9 a schematic diagram of an application scenario of a power supply system provided by an embodiment of the present application;

[0030] Figure 10 a schematic diagram of a wireless charging transmitting end provided by an embodiment of the present application. DETAILED DESCRIPTION

[0031] In order for those skilled in the art to better understand the technical solutions provided by the embodiments of the present application, first, the application scenario of the technical solutions of the present application will be described.

[0032] The power supply system involved in the present application is a medium-high voltage power supply system. Medium-high voltage generally refers to a power supply system with an input or output voltage of 1 kV or above. Common examples include 6 kV, 10 kV, 35 kV and 110 kV, which can be applied to scenarios such as data centers and charging piles for electric vehicles.

[0033] Referring to Figure 1 The figure is a schematic diagram of a medium-high voltage power supply system in the prior art.

[0034] The input of the power supply system is medium-high voltage, and the output is low voltage direct current, such as direct current (DC) 240V, DC 336V, DC 400V, and the like.

[0035] Since high voltage exists in the power supply system, a plurality of power units are usually connected in series to reduce the voltage of each power unit. A plurality of power units 20 are connected in series for each phase of the three-phase input A, B, and C of the input end of the power supply system. Each power unit 20 specifically includes a unit controller 201, a DC / DC circuit 202, and an AC / DC circuit 203. The DC / DC circuit 202 and the AC / DC circuit 203 can also be collectively referred to as a power conversion circuit. In general, the number of power units connected for each phase input is the same.

[0036] The AC / DC circuit 203 can also be referred to as a rectifier, which is used to convert the input alternating current into direct current. The DC / DC circuit 202 is used to convert the direct current to output direct current that meets the power requirement. The DC / DC circuit 202 can be a Boost circuit, a Buck circuit, a Buck-Boost circuit, or other types of circuits that can achieve direct current conversion, which is related to the size of the output voltage of the power supply system. The embodiments of the present application do not make specific limitations thereon, for example, when the output voltage is low, the high voltage input needs to be reduced, and at this time the DC / DC circuit is a Buck circuit.

[0037] The power supply system adopts a modular design, and one power unit 20 is one module. A two-layer control architecture is also adopted. The unit controller 201 in the power unit 20 controls the working state of the DC / DC circuit 202 and the AC / DC circuit 203 in the unit. The centralized controller 10 controls each unit controller 201. The centralized controller 10 is the central control unit of the power supply system, which coordinates the work of each component in the system to achieve optimal system performance.

[0038] Optical fiber communication is adopted between the centralized controller 10 and each unit controller 201.

[0039] In other implementations, the power supply system outputs alternating current, such as alternating current (AC) 380 / 400 / 415V, and the principle is similar, with the difference being the power conversion circuit, which will not be described here.

[0040] However, when the above implementation is adopted, the optical fiber interface used to implement optical fiber communication cannot be implemented as hot pluggable on the backplane, and independent optical fiber installation steps are required for the installation and maintenance of the power unit 20, thereby reducing the reliability in field operation.

[0041] To solve the above problems, the application provides a power supply system, a data center and a charging device. Each phase input of three-phase alternating current of the power supply system corresponds to connection of an input end of a power module. Each power module includes a low-voltage controller and at least two power units. Each power unit includes a unit controller and a power conversion circuit, and a bus connection is adopted between the centralized controller and each low-voltage controller, so that each power module can realize hot plugging. The optical fiber interface requiring high reliable connection is arranged in the power module, the power module can be installed and tested in the factory, and the independent optical fiber installation step is no longer needed during installation and maintenance on site, so that the on-site operation reliability is improved. In addition, with evolution of power devices, the number of power units may change, for example, the number of power units may be reduced, and the power supply system can keep the system architecture unchanged when the number of power units changes, and the interface of the power module remains unchanged, so that the difficulty of system modification is reduced.

[0042] In order to make the person skilled in the art more clearly understand the scheme of the application, the technical scheme in the embodiments of the application will be described below in combination with the drawings in the embodiments of the application.

[0043] The terms "first", "second", and the like used in the description of the application are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated

[0044] In the present application, unless otherwise explicitly specified and limited, the term "connection" should be understood in a broad sense, for example, "connection" can be fixed connection, or detachable connection, or integral; can be direct connection, or indirect connection through intermediate medium.

[0045] Embodiment one:

[0046] The embodiment of the application provides a power supply system, in particular to a medium and high voltage power supply system, the input of which is three-phase alternating current. The specific description is made below in combination with the drawings.

[0047] Referring to Figure 2 , the figure is a schematic diagram of a power supply system provided by the embodiment of the application.

[0048] The power supply system includes a centralized controller 10 and a plurality of power modules 11.

[0049] The input end of the power supply system is connected to a three-phase alternating current power supply, and each phase input of the three-phase alternating current power supply is connected to an input end of a power module 11.

[0050] In the figure, each phase input of the three-phase alternating current power supply is represented by Input-A, Input-B and Input-C respectively, and each phase input corresponds to connection of an input end of a power module 11 respectively.

[0051] Each power module 11 comprises a low-voltage controller 30 and at least two power units 20.

[0052] The specific number of power units 20 included in each power module 11 can be determined in combination with the input voltage of the power supply system, the requirements of the output voltage, and the parameters of the selected devices, etc. The embodiments of the present application do not make specific limitations.

[0053] Each power unit 20 comprises a unit controller 201 and a power conversion circuit 210.

[0054] The power conversion circuit 201 is used to output after power conversion of the input alternating current.

[0055] Taking the Input-A phase as an example, the alternating current input ends of the power conversion circuits 210 in all the power units 20 connected thereto are connected in series, the first end formed by the series connection is connected to the input end of the power module, i.e. the alternating current input of the Input-A phase, the second end formed by the series connection is converged at a same point N, the N point is the neutral point of the three-phase alternating current power supply, and the output ends of the power conversion circuits are connected in parallel.

[0056] The bus connection is adopted between the centralized controller 10 and each low-voltage controller 30, for example, the RS-485 bus, the CAN (Controller Area Network) bus, etc. The embodiments of the present application do not make specific limitations.

[0057] The low-voltage controller 30 is a bridge for communication between the centralized controller 10 and the unit controller 201 in the power module 11, and is used for mutual communication between the unit controller 201 and the centralized controller 10.

[0058] The centralized controller 10 is the central control unit of the power supply system, coordinates the work of each component in the system, and realizes the optimal performance of the system. The centralized controller 10 can send control signals to each unit controller 201 through each low-voltage controller 30.

[0059] The optical fiber communication mode is adopted between the low-voltage controller 30 and each unit controller 201 in the power module, which can improve the bandwidth between the low-voltage controller and the unit controller, reduce the communication delay, and provide the isolation required by the safety regulations.

[0060] In summary, in the power supply system provided by the embodiment of the present application, the centralized controller and the low-voltage controllers of the power modules are connected by bus, so that each power module supports hot plug. The optical fiber interface requiring high-reliability connection is arranged in the power module, and the power module can be installed and tested in the factory, and the independent optical fiber installation step is no longer needed during installation and maintenance in the field, so that the field operation reliability is improved. In addition, with the evolution of power devices, the number of power units may change, for example, the number of power units may be reduced. The power supply system can keep the system architecture unchanged and the interface of the power module unchanged when the number of power units changes, so that the difficulty of system modification is reduced.

[0061] Embodiment two:

[0062] The working principle of the power supply system will be described below.

[0063] Referring to Figure 3 , the figure is a schematic diagram of another power supply system provided by the embodiment of the present application.

[0064] The centralized controller 10 of the power supply system is located on the backboard 40, and the backboard 40 is also provided with a plurality of first hot plug interfaces 401. The power module 11 is provided with a second hot plug interface 402 corresponding to the first hot plug interface 401. The power module 11 realizes hot plug through the second hot plug interface 402 and the first hot plug interface 401.

[0065] The second hot plug interface 402 can be connected with the low-voltage controller in the power module. When the first hot plug interface 401 and the second hot plug interface 402 are connected, the centralized controller 10 sends control signals to the unit controllers through the low-voltage controllers.

[0066] The centralized controller 10 sends a first control signal to the unit controllers of the i-th phase through the low-voltage controller of the i-th phase, so that the unit controllers of the i-th phase control the output load balancing of the corresponding power conversion circuit. Wherein, i = 1, 2, 3.

[0067] In some embodiments, the low-voltage controller of the i-th phase is also used to acquire the output end sampling signal of each power conversion circuit of the i-th phase, determine the corresponding second control signal of each power conversion circuit of the i-th phase by using the output end sampling signal, and send the corresponding second control signal to the unit controllers of the i-th phase. Wherein, the second control signal is the sampling signal of the output end of each power conversion circuit in the power module, or the signal processed from the sampling signal.

[0068] The sampling signal can be a voltage signal or a current signal, which is not limited in the embodiment of the present application.

[0069] In some embodiments, the unit controller 201 can also control the working state of the power conversion circuit in the power unit by using the received second control signal sent by the low-voltage controller 30.

[0070] In yet some embodiments, the unit controller 201 controls the working state of the power conversion circuit according to both the first control signal and the second control signal.

[0071] The power conversion circuit includes controllable switching tubes, and the embodiments of the present application do not specifically limit the type of the controllable switching tubes, which can be, for example, Insulated Gate Bipolar Transistors (IGBTs), Metal Oxide Semiconductor Field Effect Transistors (MOSFETs, hereinafter referred to as MOS tubes), SiC MOSFETs (Silicon Carbide Metal Oxide Semiconductor), etc.

[0072] The unit controller can send a PWM (Pulse Width Modulation) signal to the controllable switching tube to control the working state of the controllable switching tube.

[0073] The centralized controller, the low-voltage controller and the unit controller in the embodiments of the present application can be ASICs (Application Specific Integrated Circuits), PLDs (Programmable Logic Devices), DSPs (Digital Signal Processors) or combinations thereof. The PLD can be a CPLD (Complex Programmable Logic Device), an FPGA (Field-programmable Gate Array), a GAL (Generic Array Logic) or any combination thereof, and the embodiments of the present application do not specifically limit this.

[0074] In summary, the power supply system provided by the embodiment of the present application adopts a modular design, each phase of the three-phase alternating current input corresponds to a power module, and each power module can realize hot plugging due to the bus communication between the centralized controller and the low-voltage controller of the power module. The optical fiber interface requiring high-reliability connection is arranged in the power module, the power module can be installed and tested in the factory, and the independent optical fiber installation step is no longer required during installation and maintenance in the field, thereby improving the high reliability of field operation. In addition, with the evolution of power devices, the number of power units may change, for example, the number of power units may be reduced, and the power supply system can keep the system architecture unchanged when the number of power units changes, and the interface of the power module remains unchanged, thereby reducing the difficulty of system modification.

[0075] Embodiment two:

[0076] The working principle of the power supply system will be described below in combination with specific implementation manners.

[0077] Referring to Figure 4 , the figure is a schematic diagram of another power supply system provided by the embodiment of the present application.

[0078] The power supply system provided by the embodiment of the present application is used to convert the input three-phase alternating current into direct current and then output.

[0079] The power conversion circuit of each power unit 20 includes an AC / DC conversion circuit 203 and a DC / DC conversion circuit 202.

[0080] The input end of the AC / DC circuit 203 (i.e., the alternating current input end of the AC / DC circuit) is the alternating current input end of the power conversion circuit, the input ends of the plurality of AC / DC circuits 203 in the same power module are connected in series, the first end formed after the series connection is connected to the i-th phase input of the three-phase alternating current, and the second end formed after the series connection is connected to the neutral point N of the three-phase alternating current power supply. In some embodiments, the AC / DC circuit 203 can also be referred to as a rectification circuit or a rectifier.

[0081] The output end of the AC / DC circuit 203 is connected to the input end of the DC / DC circuit 202, and the output end of the DC / DC circuit 202 is connected to the output end of the power supply system. The output ends of the DC / DC circuits 202 are connected in parallel.

[0082] The AC / DC circuit 203 is used to convert alternating current into direct current and then transmit the direct current to the DC / DC circuit 202.

[0083] The DC / DC circuit 202 is used to output the obtained direct current after direct current conversion.

[0084] Referring to Figure 5Fig. 1 is a schematic diagram of a power conversion circuit according to an embodiment of the present application.

[0085] The power conversion circuit converts the AC input of the A phase into DC and outputs the DC. The DC / DC circuit 202 is an LLC resonant DC / DC converter. The structure and specific working principle of the AC / DC circuit and the DC / DC circuit are mature existing technologies, and thus will not be described herein.

[0086] The low-voltage controller 30 sends a corresponding second control signal to the unit controller 201 in the power module. The second control signal can be a sampling signal of the DC output of each DC / DC circuit in the power module, and specifically can be a sampling voltage or a sampling current.

[0087] In some embodiments, the low-voltage controller 30 can obtain a sampling signal of the voltage through a voltage sensor or a sampling signal of the current through a current sensor. The second control signal can also be a signal obtained by processing the sampling signal.

[0088] The low-voltage controller 30 can be used as a relay for communication between the centralized controller 10 and the unit controller 201, and can send a signal from the centralized controller 10 to the unit controller 201.

[0089] The centralized controller 10 sends a first control signal to each unit controller 201 through the low-voltage controller 30. The first control signal is used to balance the output load of each power conversion circuit.

[0090] The unit controller 201 can control the working state of the switch tube in the AC / DC conversion circuit 203 and the DC / DC conversion circuit 202 according to the first control signal and the second control signal.

[0091] In some embodiments, the centralized controller 10 is also used to sample the input voltage and current of the power supply system, i.e., to sample the input voltage and input current of all power modules. The unit controller 201 is also used to sample the output DC voltage of the AC / DC circuit 203. The power supply system can use the above sampling results to control the working state of the AC / DC circuit to perform power factor correction (PFC).

[0092] In some embodiments, the unit controller 201 can include a controller of the DC / DC circuit and a controller of the AC / DC circuit when implemented. The two controllers can be integrated together or independently arranged, and the embodiments of the present application do not make specific limitations. When the two controllers are independently arranged, the unit controller is a general term for the two controllers.

[0093] Referring to Figure 6 Fig. 4 is a schematic diagram of still another power supply system according to an embodiment of the present application.

[0094] The power conversion circuit of the power unit includes an AC / DC conversion circuit 203 and a DC / AC conversion circuit 204.

[0095] The input end of the AC / DC circuit 203 is the AC input end of the power conversion circuit, i.e., the input ends of the multiple AC / DC circuits 203 in the same power module are connected in series, the first end formed after the series connection is connected to one phase of the three-phase AC power supply, and the second end formed after the series connection is connected to the neutral point N of the three-phase AC power supply. The output end of the AC / DC circuit 203 is connected to the input end of the DC / AC circuit 204, and the output end of the DC / AC circuit 204 is connected to the output end of the power supply system.

[0096] The AC / DC circuit 203 is used to convert AC power into DC power and transmit the DC power to the DC / AC circuit 204.

[0097] The DC / AC circuit 204 is used to convert the obtained DC power into AC power and output the AC power. In some embodiments, the DC / AC circuit 204 can also be referred to as an inverter circuit or an inverter.

[0098] For the description of the centralized controller 10, the low-voltage controller 30, and the unit controller 201, please refer to Figure 5 Corresponding parts, which will not be described here again.

[0099] In some embodiments, the unit controller 201 can include a controller of the DC / AC circuit and a controller of the AC / DC circuit when implemented. The two controllers can be integrated together or independently arranged, and the present application does not make specific limitations. When the two controllers are independently arranged, the unit controller is a general term of the two controllers.

[0100] In summary, the power supply system provided by the embodiments of the present application adopts a modular design, each phase of the three-phase alternating current input corresponds to a power module, and each power module can realize hot plugging because of the bus connection between the centralized controller and the low-voltage controller of the power module. The optical fiber interface that needs high-reliability connection is arranged in the power module, the power module can be installed and tested in the factory, and the independent optical fiber installation step is no longer needed during installation and maintenance in the field, thereby improving the high reliability of field operation. In addition, with the evolution of power devices, the number of power units may change, for example, the number of power units may be reduced, and the power supply system can keep the system architecture unchanged when the number of power units changes, and the interface of the power module remains unchanged, thereby reducing the difficulty of system modification. In addition, the centralized controller and the unit controller of the power supply system can also perform fault detection, thereby improving the safety of the power supply system.

[0101] Embodiment three:

[0102] Based on the power supply system provided in the above embodiments, the embodiments of the present application further provide a data center applying the power supply system, which will be specifically described below with reference to the accompanying drawings.

[0103] Referring to Figure 7 , the figure is a schematic diagram of a data center provided by the embodiments of the present application.

[0104] The data center is a specific device network for global cooperation, which is used to deliver, accelerate, display, calculate and store data information on the internet network infrastructure. The data center 600 provided by the embodiments of the present application includes a power supply system 601 and a load device 602.

[0105] The power supply system 601 is used to supply power to the load device 602, and one or more load devices can be supplied with power by the same power supply system. The output of the power supply system 601 can be direct current or alternating current. The description of the power supply system can be referred to the above embodiments, which will not be repeated here.

[0106] The embodiments of the present application do not specifically limit the number of power supply systems and load devices included in the data center.

[0107] Among them, the load device 602 can be a network switch, a server cluster, a storage device, a monitoring device, a cooling device, etc., which is not specifically limited by the embodiments of the present application.

[0108] ​In summary, the data center provided by the embodiments of the present application uses a power supply system, an input end of the power supply system is connected to a three-phase alternating current power supply, and each phase input of the three-phase alternating current power supply is connected to an input end of a power module. Each power module includes a low-voltage controller and at least two power units. Each power unit includes a unit controller and a power conversion circuit, and a bus connection is used between the centralized controller and each low-voltage controller. The low-voltage controller is used for the transfer of communication between the unit controller and the centralized controller.

[0109] The power supply system adopts a modular design, each phase input of the three-phase alternating current power supply corresponds to a power module, and because a bus connection is used between the centralized controller and the low-voltage controller of the power module, each power module can be hot-swapped. The optical fiber interface that requires a high-reliability connection is disposed in the power module, and the power module can be installed and tested in the factory, so that an independent optical fiber installation step is no longer required during installation and maintenance on site, thereby improving the reliability of on-site operation. In addition, as power devices evolve, the number of power units can change, for example, the number of power units can be reduced. The power supply system can maintain the system architecture unchanged when the number of power units changes, and the interface of the power module remains unchanged, thereby reducing the difficulty of system modification.

[0110] Therefore, a high-reliability and easy-to-install and maintain power supply system is provided for a data center, thereby improving the safety and stability of the data center.

[0111] The embodiments of the present application also provide a charging device, the charging device includes the power supply system described in the above embodiments, and the charging device is used to charge an electric vehicle. The charging device can be a charging pile supporting wired charging or a charging device supporting wireless charging, which will be described in detail below.

[0112] Embodiment four: refer to Figure 8 , which is a schematic diagram of a charging pile provided by the embodiments of the present application.

[0113] The charging pile 700 includes a power supply system 601 and a charging pile load circuit 701.

[0114] The power supply system 601 is used to supply power to the charging pile, specifically to supply power to the charging pile load circuit 701. In some embodiments, the load circuit of the charging pile 700 can include a storage circuit, a control circuit, a display circuit, and a power circuit, etc., which is not limited in the embodiments of the present application.

[0115] The charging pile 700 is used to charge an electric vehicle. In some embodiments, the charging pile 700 charges the electric vehicle through a cable connected to a charging gun. At this time, the charging pile 700 can be arranged on the ground to become a fixed charging station or a charging parking space.

[0116] Referring to Figure 9 FIG. 1 is a schematic diagram of an application scenario of a power supply system according to an embodiment of the present application.

[0117] In some embodiments, the same power supply system 601 can also supply power to multiple charging piles 700.

[0118] At this time, the output end of the power supply system 601 is connected to multiple charging piles 700, thereby supplying power to the charging pile load circuit of the multiple charging piles 700.

[0119] In summary, the charging pile provided by the embodiments of the present application uses the power supply system for power supply. The input end of the power supply system is connected to a three-phase alternating current power supply. Each phase input of the three-phase alternating current power supply is correspondingly connected to the input end of a power module. Each power module includes a low-voltage controller and at least two power units. Each power unit includes a unit controller and a power conversion circuit. The bus connection is adopted between the centralized controller and each low-voltage controller. The low-voltage controller is used for the relay of the communication between the unit controller and the centralized controller.

[0120] The power supply system adopts a modular design. Each phase input of the three-phase alternating current power supply corresponds to a power module. Since the bus connection is adopted between the centralized controller and the low-voltage controller of the power module, each power module can realize hot plugging. The optical fiber interface that needs high-reliability connection is deployed in the power module. The power module can be installed and tested in the factory. When installed and maintained on site, the independent optical fiber installation step is no longer needed, thereby improving the high reliability of the on-site operation. In addition, with the evolution of power devices, the number of power units can change, for example, the number of power units can be reduced. The power supply system can maintain the system architecture unchanged when the number of power units changes. The interface of the power module remains unchanged, thereby reducing the difficulty of system modification. Therefore, the power supply system with high reliability and convenient installation and maintenance is provided for the charging pile, thereby improving the safety and stability of the charging pile.

[0121] Embodiment five

[0122] The charging device includes a wireless charging transmitting end. The wireless charging transmitting end is configured to provide power for a wireless charging receiving end located on the electric vehicle. The wireless charging receiving end is configured to charge a power battery pack on the electric vehicle. Details are described below with reference to the accompanying drawings.

[0123] Referring to Figure 10 FIG. 2 is a schematic diagram of a wireless charging transmitting end according to an embodiment of the present application.

[0124] The wireless charging transmitting end 900 includes the power supply system provided in the above embodiments. The power supply system is configured to supply power to the transmitting end, and is specifically configured to supply power to the control module, the wireless communication module, and the power module of the transmitting end.

[0125] In the scenario of wireless charging, the transmitting end 900 of wireless charging is responsible for sending electric energy in the form of alternating magnetic field, and the receiving end 1100 of wireless charging included in the electric vehicle 1000 is used to convert the alternating magnetic field into electric energy to charge the power battery pack, thereby realizing non-contact charging. The transmitting end 900 of wireless charging can be arranged on the ground or buried under the ground, forming a wireless charging station, a wireless charging parking space or a wireless charging road, etc.

[0126] In summary, the transmitting end of wireless charging provided by the embodiment of the present application is powered by the power supply system, the input end of the power supply system is connected to a three-phase alternating current power supply, and each phase input of the three-phase alternating current power supply is correspondingly connected to the input end of a power module. Each power module includes a low-voltage controller and at least two power units. Each power unit includes a unit controller and a power conversion circuit, and a bus connection is adopted between the centralized controller and each low-voltage controller. The low-voltage controller is used for the transfer of communication between the unit controller and the centralized controller.

[0127] The power supply system adopts a modular design, each phase input of the three-phase alternating current power supply corresponds to a power module, and since a bus connection is adopted between the centralized controller and the low-voltage controller of the power module, each power module can realize hot plugging. The optical fiber interface requiring high reliable connection is arranged in the power module, and the power module can be installed and tested in the factory, so that the independent optical fiber installation step is no longer needed during installation and maintenance on site, thereby improving the reliability of on-site operation. In addition, with the evolution of power devices, the number of power units may change, for example, the number of power units may be reduced, and the power supply system can maintain the system architecture unchanged when the number of power units changes, and the interface of the power module remains unchanged, thereby reducing the difficulty of system modification. Therefore, the safety and stability of the transmitting end of wireless charging are improved.

[0128] It should be understood that in the present application, "at least one" refers to one or more, and "multiple" refers to two or more. "And / or" is used to describe the association relationship of the associated objects, which means that there can be three kinds of relationships, for example, "A and / or B" can represent: only A, only B and A and B exist at the same time, wherein A and B can be singular or plural. The character " / " generally represents that the associated objects before and after are in an "or" relationship. "At least one of the following" or similar expressions means any combination of these items, including single item or any combination of multiple items. For example, at least one of a, b or c, can represent: a, b, c, "a and b", "a and c", "b and c", or "a and b and c", wherein a, b, and c can be single or multiple.

[0129] The connection mode between the circuit modules in the embodiments of the present application is only schematic, used to simply indicate the connection relationship between the modules, and the number of specific connection lines is not a limitation on the number of connection lines in the actual hardware circuit.

[0130] The above embodiments are only used to illustrate the technical solutions of the present application, rather than limit them; although the foregoing embodiments of the present application have been described in detail, those skilled in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A power supply system for an external three-phase alternating current power supply, characterized by, The power supply system comprises a centralized controller and three power modules, one power module is connected to each phase of the alternating current power supply, and the input end of each power module is connected to one phase of the alternating current power supply; Each power module comprises a low-voltage controller and at least two power units, and each power unit comprises a unit controller and a power conversion circuit; The centralized controller and the low-voltage controllers are connected by a bus; The centralized controller sends control signals to the unit controllers through the low-voltage controllers, for controlling the unit controllers and / or the power conversion circuits; The backplane of the power supply system is provided with a plurality of first hot plug interfaces, and the centralized controller is connected to the plurality of first hot plug interfaces; Each power module is respectively provided with a second hot plug interface corresponding to the first hot plug interface; The power module realizes hot plugging with the first hot plug interface through the second hot plug interface.

2. The power supply system according to claim 1, characterized by The bus is an RS-485 bus or a controller area network (CAN) bus.

3. The power supply system of claim 1, wherein Within one power module, the low-voltage controller and the unit controllers communicate by optical fiber.

4. The power supply system according to any one of claims 1 to 3, characterized by The centralized controller sends first control signals to the unit controllers of the i-th phase through the low-voltage controller of the i-th phase, so that the unit controllers of the i-th phase control the output load balancing of the corresponding power conversion circuits, where i=1, 2, 3.

5. The power supply system of claim 4, wherein The low-voltage controller of the i-th phase is also used to obtain output sampling signals of the power conversion circuits of the i-th phase, determine second control signals corresponding to the power conversion circuits of the i-th phase by using the output sampling signals, and send the second control signals to the unit controllers of the i-th phase; The unit controllers of the i-th phase are used to control the working state of the power conversion circuit in the power unit by using the first control signals and the second control signals.

6. The power supply system of claim 4, wherein The power supply system is used to output direct current; Each power conversion circuit comprises an AC / DC circuit and a DC / DC circuit, and the output end of the AC / DC circuit is connected to the input end of the DC / DC circuit; The alternating current input ends of the AC / DC circuits of the i-th phase are connected in series to form a first end connected to the i-th phase alternating current power supply, and the alternating current input ends of the AC / DC circuits of the i-th phase are connected in series to form a second end connected to the neutral point of the three-phase alternating current power supply; The output ends of all the DC / DC circuits are connected in parallel; The AC / DC circuit is used to convert alternating current into direct current and transmit it to the DC / DC circuit; The DC / DC circuit is used to output the obtained direct current after direct current conversion.

7. The power supply system of claim 4, wherein The power supply system is used to output alternating current; Each power conversion circuit comprises an AC / DC circuit and a DC / AC circuit, and the output end of the AC / DC circuit is connected to the input end of the DC / AC circuit; a first end of AC input terminals of the AC / DC circuits of the i-th phase are connected to an AC power supply of the i-th phase, and a second end of the AC input terminals of the AC / DC circuits of the i-th phase are connected to a neutral point of the three-phase AC power supply; outputs of the DC / AC circuits are connected in parallel; the AC / DC circuits are configured to convert AC power into DC power and transmit the DC power to the DC / AC circuits; the DC / AC circuits are configured to convert the obtained DC power into AC power and output the AC power.

8. The power supply system of claim 6, wherein the central controller is further configured to sample input voltage and input current of all the power modules, and the unit controller is further configured to sample output voltage of the AC / DC circuit in the power unit, so that the power supply system controls each of the AC / DC circuits by using the sampling results of input voltage and input current of the power supply system and the sampling result of the output DC voltage.

9. The power supply system of claim 6, wherein, the DC / DC circuit is an LLC resonant type DC / DC converter.

10. A data center, characterized by, The power supply system of any one of claims 1-9, further comprising a load device. The power supply system is configured to supply power to the load device.

11. A charging device, characterized by The power supply system of any one of claims 1-9. The charging device is configured to charge the electric vehicle by using the power provided by the power supply system.

12. The charging apparatus according to claim 11, characterized by, The charging device is a charging pile.

13. The charging apparatus according to claim 11, characterized by, The charging device comprises a wireless charging transmitting end configured to provide power to a wireless charging receiving end on the electric vehicle. The wireless charging receiving end is configured to charge a power battery pack on the electric vehicle.

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