Uninterruptible power supply device and uninterruptible power supply device

Abstract

The invention provides uninterruptible power supply equipment and an uninterruptible power supply device. The uninterruptible power supply equipment comprises a power grid bus, an energy storage battery, a charging and discharging conversion unit and a first transistor body diode, the first end of the charging and discharging conversion unit is coupled to the energy storage battery, and the charging and discharging conversion unit is used for controlling the energy storage battery to charge the energy storage battery by using a power grid voltage under the condition that the power grid bus has the power grid voltage and controlling the energy storage battery to discharge to the power grid bus under the condition that the power grid bus does not have the power grid voltage; the source electrode of the first transistor body diode is coupled to the first end of the charging and discharging conversion unit, and the drain electrode of the first transistor body diode is coupled to the power grid bus and used for being switched on in the charging and discharging conversion period of the charging and discharging conversion unit and transmitting the voltage of the energy storage battery to the power grid bus. The equipment can eliminate conversion delay and a power supply gap, improve the power supply conversion speed of the UPS, realize zero millisecond switching between power grid power supply and energy storage battery power supply, and further supply power to a power supply acceptor uninterruptedly.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of power supply, in particular to an uninterruptible power supply device and an uninterruptible power supply apparatus. BACKGROUND

[0002] UPS (Uninterruptible Power System) is a constant voltage and constant frequency uninterruptible power supply containing an energy storage device and an inverter as the main component. When the power grid is normally powered, the UPS supplies the voltage provided by the power grid to the load after voltage stabilization, at this time, the UPS is an AC voltage stabilizer, and also charges the internal energy storage battery; when the power grid is powered off, the UPS immediately provides power to the power recipient by the energy of the energy storage battery through the inverter to supply power to the power recipient.

[0003] However, the existing UPS has certain power supply gaps and conversion delays during power supply conversion, which is difficult to meet the reliable power supply requirements of power sensitive equipment, and is easy to cause the power sensitive equipment to stop running, and even cause equipment damage. SUMMARY

[0004] The present application aims to provide an uninterruptible power supply device and an uninterruptible power supply apparatus to improve the power supply conversion speed of the UPS.

[0005] Therefore, the first aspect of the present application provides an uninterruptible power supply device, comprising: a power grid bus, an energy storage battery, a charge-discharge conversion unit and a first transistor body diode, the first end of the charge-discharge conversion unit is coupled to the energy storage battery, the charge-discharge conversion unit is used to control the energy storage battery to be charged by the grid voltage on the power grid bus, and to control the energy storage battery to be discharged to the power grid bus when there is no grid voltage on the power grid bus; the source of the first transistor body diode is coupled to the first end of the charge-discharge conversion unit, and the drain of the first transistor body diode is coupled to the power grid bus, and is used to conduct during the charge-discharge conversion of the charge-discharge conversion unit to transmit the voltage of the energy storage battery to the power grid bus.

[0006] In some technical solutions of the present application, the uninterruptible power supply device further comprises: an adapter and an inverter, the input end of the adapter is coupled to the power grid, the output end of the adapter is coupled to the power grid bus, and is used for converting the AC voltage to DC voltage of the grid voltage; the input end of the inverter is coupled to the power grid bus, and the output end of the inverter is coupled to the load, and is used for converting the DC voltage on the power grid bus into an AC voltage to supply power to the load.

[0007] In some embodiments of the application, the uninterruptible power supply device further comprises: an inductor and a second transistor body diode, a first end of the inductor is coupled to the first end of the charge-discharge conversion unit, and a second end of the inductor is coupled to the source of the first transistor body diode; the drain of the second transistor body diode is coupled to the source of the first transistor body diode, and the source of the second transistor body diode is coupled to the second end of the charge-discharge conversion unit.

[0008] In some embodiments of the application, the first transistor body diode belongs to a first metal oxide semiconductor transistor, and the second transistor body diode belongs to a second metal oxide semiconductor transistor; the switch control end of the charge-discharge conversion unit is coupled to the source of the first transistor body diode, and the drive end of the charge-discharge conversion unit is coupled to the gate of the first metal oxide semiconductor transistor and the gate of the second metal oxide semiconductor transistor.

[0009] In some embodiments of the application, the charge-discharge conversion unit comprises a first controller and a direct current converter coupled to the first controller; the first controller detects the grid voltage on the grid bus, in the case that there is a grid voltage on the grid bus, controls the direct current converter to work in a step-down mode, and reduces the grid voltage to the power supply voltage of the energy storage battery to supply power to the energy storage battery, and in the case that there is no grid voltage on the grid bus, controls the direct current converter to work in a step-up mode, and the output voltage of the energy storage battery is boosted to the grid voltage and output to the grid bus.

[0010] In some embodiments of the application, the energy storage battery is a plurality of plug-in power banks on the base, and the direct current converter is a plurality of direct current converters respectively coupled to the plurality of power banks.

[0011] In some embodiments of the application, the base has a plurality of power bank interfaces for electrical connection with the plurality of power banks; the first controller detects the state of the plurality of power bank interfaces, and in the case that the power bank interface and the power bank start to be electrically connected, the power bank is woken up, and the output voltage of the power bank is used to supply power to the first controller.

[0012] In some embodiments of the application, the first controller detects the state of the plurality of power bank interfaces, and in the case that the power bank interface and the power bank start to be electrically connected or disconnected, the output power of each power bank inserted in the base is redistributed.

[0013] In some embodiments of the application, the energy storage battery comprises a second controller, and the first controller and the second controller have a single transmission channel therebetween, and the first controller and the second controller transmit and receive through half-duplex mode on the transmission channel.

[0014] The second aspect of this application provides an uninterruptible power supply device, including: an uninterruptible power supply device as described in any of the above technical solutions.

[0015] This application provides an uninterruptible power supply (UPS) device and apparatus, which includes at least the following beneficial effects: Through the coordinated operation of a charge / discharge conversion unit and a first transistor body diode, zero-millisecond switching between grid power supply and energy storage battery power supply is achieved. When the grid is powered, the charge / discharge conversion unit controls the grid voltage to charge the energy storage battery. Simultaneously, because the voltage on the grid bus is greater than the energy storage battery voltage, the first transistor body diode is turned off. At the instant the grid power is cut off, the energy storage battery switches from charging to discharging. At this time, the grid bus voltage briefly drops to 0, and the first transistor body diode immediately turns on, directly transmitting the energy storage battery voltage to the grid bus. This eliminates the need to wait for the charge / discharge conversion unit to complete the mode switching, thus eliminating conversion delay and power supply gap, improving the UPS power supply conversion speed, and achieving uninterrupted power supply to the power recipient.

[0016] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0017] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0018] Figure 1 A circuit structure diagram of an uninterruptible power supply device provided in an embodiment of this application;

[0019] Figure 2 A structural block diagram of a charge-discharge conversion unit provided in an embodiment of this application;

[0020] Figure 3 This is a schematic diagram of the structure of a base and a power bank provided in an embodiment of this application;

[0021] Figure 4 A schematic diagram of the communication architecture of an uninterruptible power supply device provided in an embodiment of this application;

[0022] Figure 5 A schematic diagram of the power supply architecture of an uninterruptible power supply device provided in an embodiment of this application;

[0023] Figure 6 A structural block diagram of the uninterruptible power supply device provided in the embodiments of this application;

[0024] Reference numerals: 1. Base; 2. Power bank; 10. Power grid bus; 20. Energy storage battery; MCU2. Second controller; 30. Charge / discharge conversion unit; MCU1. First controller; DC / DC converter; Q1. First transistor body diode; AC / DC adapter; INV. Inverter; L. Inductor; Q2. Second transistor body diode; 40. Power bank interface; 100. Uninterruptible power supply device; 200. Uninterruptible power supply unit. Detailed Implementation

[0025] To better understand the above-mentioned objectives, features, and advantages of this application, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0026] Many specific details are set forth in the following description in order to provide a full understanding of this application. However, this application may also be implemented in other ways different from those described herein. Therefore, the scope of protection of this application is not limited to the specific embodiments disclosed below.

[0027] The following reference Figures 1 to 6 This application describes uninterruptible power supply devices and uninterruptible power supply apparatuses according to some embodiments.

[0028] like Figures 1 to 5 As shown, the first aspect of this application provides an uninterruptible power supply device including: a mains bus 10, an energy storage battery 20, a charge-discharge conversion unit 30, and a first transistor body diode Q1. The first terminal of the charge-discharge conversion unit 30 is coupled to the energy storage battery 20. The charge-discharge conversion unit 30 is used to control the energy storage battery 20 to charge using the mains voltage when there is a mains voltage on the mains bus 10, and to control the energy storage battery 20 to discharge to the mains bus 10 when there is no mains voltage on the mains bus 10. The source of the first transistor body diode Q1 is coupled to the first terminal of the charge-discharge conversion unit 30, and the drain of the first transistor body diode Q1 is coupled to the mains bus 10. It is used to conduct during the charge-discharge conversion of the charge-discharge conversion unit 30 to deliver the voltage of the energy storage battery 20 to the mains bus 10.

[0029] In the above embodiments, the uninterruptible power supply (UPS) device includes a mains bus 10, an energy storage battery 20, a charge-discharge conversion unit 30, and a first transistor body diode Q1. The first terminal of the charge-discharge conversion unit 30 is coupled to the energy storage battery 20, the source of the first transistor body diode Q1 is coupled to the first terminal of the charge-discharge conversion unit 30, and the drain of the first transistor body diode Q1 is coupled to the mains bus 10. Through the coordinated operation of the charge-discharge conversion unit 30 and the first transistor body diode Q1, zero-millisecond switching between mains power supply and energy storage battery 20 power supply is achieved. When the power grid is active, the charge / discharge conversion unit 30 controls the grid voltage to charge the energy storage battery 20. At the same time, since the voltage on the grid bus 10 is greater than the voltage of the energy storage battery 20, the first transistor body diode Q1 is turned off. At the moment of grid power failure, the energy storage battery 20 switches from charging to discharging. At this time, the voltage on the grid bus 10 drops to 0 for a short time, and the first transistor body diode Q1 immediately turns on, directly supplying the voltage of the energy storage battery 20 to the grid bus 10. There is no need to wait for the charge / discharge conversion unit 30 to complete the mode switching, eliminating the conversion delay and power supply gap, improving the speed of UPS power supply conversion, and realizing uninterrupted power supply to the power recipient.

[0030] It should be noted that, as Figure 1 As shown, Figure 1 The thick solid line in the image represents the power grid bus 10; Figure 1 The AFE (Analog Front End) in the battery management system is an integrated circuit chip used to accurately measure parameters such as battery voltage, current, and temperature; PP+ is the pre-charge positive terminal, P+ is the power positive terminal, B+ is the battery positive terminal, CC+ is the communication data positive terminal, C- is the communication data negative terminal, PP- is the pre-charge negative terminal, P- is the power negative terminal, AC IN is the AC input, and AC OUT is the AC output.

[0031] like Figure 1 As shown, in some embodiments of this application, optionally, the uninterruptible power supply device further includes: an AC / DC adapter and an inverter INV. The input terminal of the AC / DC adapter is coupled to the power grid, and the output terminal of the AC / DC adapter is coupled to the power grid bus 10, for converting the power grid voltage from AC voltage to DC voltage; the input terminal of the inverter INV is coupled to the power grid bus 10, and the output terminal of the inverter INV is coupled to the load, for converting the DC voltage on the power grid bus 10 into AC voltage to supply power to the load.

[0032] In the above embodiment, the input terminal of the AC / DC adapter is coupled to the power grid, the output terminal of the AC / DC adapter is coupled to the power grid bus 10, the input terminal of the inverter INV is coupled to the power grid bus 10, and the output terminal of the inverter INV is coupled to the load. When the power grid is normal, the AC / DC adapter converts the AC mains power into the DC power required by the power grid bus 10, and the inverter INV inverts the DC power from the power grid bus 10 into AC power to supply the load. During a power grid interruption, while the battery maintains the voltage of the power grid bus 10, the inverter INV continuously obtains stable DC power from the power grid bus 10 and outputs uninterrupted AC power to the load, enabling zero-millisecond switching at the final AC output terminal and providing complete uninterrupted AC power protection for the load.

[0033] like Figure 1 As shown, in some embodiments of this application, optionally, the uninterruptible power supply device further includes: an inductor L and a second transistor body diode Q2, the first end of the inductor L being coupled to the first end of the charge-discharge conversion unit 30, the second end of the inductor L being coupled to the source of the first transistor body diode Q1; the drain of the second transistor body diode Q2 being coupled to the source of the first transistor body diode Q1, and the source of the second transistor body diode Q2 being coupled to the second end of the charge-discharge conversion unit 30.

[0034] In the above embodiment, the first end of the inductor L is coupled to the first end of the charge-discharge conversion unit 30, the second end of the inductor L is coupled to the source of the first transistor body diode Q1, the drain of the second transistor body diode Q2 is coupled to the source of the first transistor body diode Q1, and the source of the second transistor body diode Q2 is coupled to the second end of the charge-discharge conversion unit 30. When any change occurs in the circuit's operating state, the inductor L stores and transfers energy, while at least one of the first transistor body diode Q1 and the second transistor body diode Q2 is in a conductive state, providing an uninterrupted current path for the mains bus 10, thus enhancing the reliability and stability of the switching process at the circuit topology level.

[0035] like Figure 1 As shown, in some embodiments of this application, optionally, the first transistor body diode Q1 belongs to a first metal-oxide-semiconductor transistor, and the second transistor body diode Q2 belongs to a second metal-oxide-semiconductor transistor; the switching control terminal of the charge-discharge conversion unit 30 is coupled to the source of the first transistor body diode Q1, and the driving terminal of the charge-discharge conversion unit 30 is coupled to the gate of the first metal-oxide-semiconductor transistor and the gate of the second metal-oxide-semiconductor transistor.

[0036] In the above embodiment, the switching control terminal of the charge-discharge conversion unit 30 is connected to the source of the body diode Q1 of the first transistor, and the driving terminal of the charge-discharge conversion unit 30 is connected to the gate of the first metal-oxide-semiconductor transistor and the second metal-oxide-semiconductor transistor, which can realize high-efficiency synchronous rectification control. During steady-state operation, the controller outputs a PWM signal through the driving terminal to control the conduction and power transmission of the two transistors, reducing conduction losses. At the moment of switching, the body diodes inside the two transistors act as physical backups to provide a current path, ensuring the realization of zero-millisecond switching function, combining high efficiency and high reliability.

[0037] like Figure 1 and Figure 2 As shown, in some embodiments of this application, optionally, the charge / discharge conversion unit 30 includes a first controller MCU1 and a DC / DC converter coupled to the first controller MCU1; the first controller MCU1 detects the grid voltage on the grid bus 10, and when there is grid voltage on the grid bus 10, controls the DC / DC converter to operate in buck mode, stepping down the grid voltage to the supply voltage of the energy storage battery 20 to supply power to the energy storage battery 20, and when there is no grid voltage on the grid bus 10, controls the DC / DC converter to operate in boost mode, boosting the output voltage of the energy storage battery 20 to the grid voltage and outputting it to the grid bus 10.

[0038] For example, the DC / DC converter may be model SC8813. The first controller may be model GD32F303RCT6.

[0039] In the above embodiment, the first controller MCU1 detects the voltage status on the mains bus 10 and controls the operating mode of the DC / DC converter. When voltage is detected on the mains bus 10, the first controller MCU1 controls the DC / DC converter to operate in buck mode to charge the energy storage battery 20. When voltage is detected to disappear from the mains bus 10, the first controller MCU1 immediately controls the DC / DC converter to switch to boost mode, outputting the energy from the energy storage battery 20 to the mains bus 10. This enables automatic judgment and seamless switching of the operating state, ensuring that the energy storage battery 20 is always available and can respond immediately in the event of a grid interruption.

[0040] like Figure 3 , Figure 4 and Figure 5 As shown, in some embodiments of this application, optionally, the energy storage battery 20 is a plurality of pluggable power banks 2 on the base 1, and the DC / DC converter is a plurality of DC / DC converters respectively coupled to the plurality of power banks 2.

[0041] In the above embodiment, the energy storage battery 20 consists of multiple pluggable power banks 2 on the base 1, and the DC / DC converters are multiple DC / DC converters connected to the power banks 2 respectively. In practical applications, users can freely increase or decrease the number of power banks 2 according to actual backup time requirements, flexibly adjusting the total energy storage capacity of the system. Simultaneously, the standardized power banks 2 can be used as independent mobile power sources, improving the versatility and utilization of the batteries and solving the problem of dedicated batteries and inflexible configuration in traditional uninterruptible power supplies.

[0042] It should be noted that, in Figure 4 and Figure 5 In the diagram, OUT 5V indicates that the power bank's 40V output voltage is 5V; BAT1, BAT2, and BAT3 represent the corresponding energy storage batteries, used to indicate the installation location of the energy storage batteries. VBUS (Voltage Bus), BVBSC (VBUS Control); USART (Universal Synchronous / Asynchronous Receiver / Transmitter) indicates a serial communication interface; TX / RX indicates transmit / receive lines; I2C (Inter-Integrated Circuit) is an integrated circuit bus; VCC (Voltage at the Common Collector) indicates the circuit's supply voltage; ID is the identification line; -1, -2, -3, -4, etc. are serial numbers; UART (Universal Asynchronous Receiver / Transmitter) is a hardware communication protocol used for asynchronous serial communication between devices; LDO (Low Dropout Regulator) is an existing voltage regulation method; DOUT (Data Output) refers to the data output pin of a chip or module; GND (Ground) indicates the ground terminal.

[0043] like Figure 4 and Figure 5 As shown, in some embodiments of this application, optionally, the base 1 has multiple power bank interfaces 40 for electrical connection with multiple power banks 2; the first controller MCU1 detects the status of the multiple power bank interfaces 40, and when it detects that the power bank interface 40 has started to be electrically connected to the power bank 2, it wakes up the power bank 2 and uses the output voltage of the power bank 2 to power the first controller MCU1.

[0044] In the above embodiment, the multiple power bank ports 40 on the base 1 are used for electrical connection with multiple power banks 2. The first controller MCU1 can detect the status of the multiple power bank ports 40. When it detects that a power bank port 40 has started to connect with a power bank 2, it wakes up the power bank 2 and uses the output voltage of the power bank 2 to power the first controller MCU1. This enables the power bank 2 to be plug-and-play and provides redundant power for the control system. Even if the external AC input is completely interrupted, as long as any one of the power banks 2 is present, the first controller MCU1 can be ensured to continue to work, maintaining the stable operation of the core functions of the uninterruptible power supply equipment.

[0045] like Figure 4 and Figure 5 As shown, in some embodiments of this application, optionally, the first controller MCU1 detects the status of multiple power bank interfaces 40, and when it detects that the power bank interface 40 has started to connect or disconnect from the power bank 2, it redistributes the output power of each power bank 2 inserted on the base 1.

[0046] In the above embodiment, the first controller MCU1 can detect the status of multiple power bank interfaces 40. When it detects that a power bank interface 40 has started to connect or disconnect from a power bank 2, it redistributes the output power of each power bank 2 inserted on the base 1. This ensures that the total output power of the system remains stable during the insertion or removal of power bank 2. When a power bank 2 is removed, it prevents the remaining power bank 2 from being overloaded; when a new power bank 2 is inserted, it optimizes the load distribution of each power bank 2, realizing flexible adjustment of energy storage configuration without interrupting power supply.

[0047] For example, when the mains bus 10 is powered, the mains bus 10 supplies power to the first controller MCU1, and the base 1 can start working normally; when the mains bus 10 is not powered, the power bank 2 supplies power to the first controller MCU1, and the base 1 can start working normally.

[0048] like Figure 4 As shown, in some embodiments of this application, optionally, the energy storage battery 20 includes a second controller MCU2, and the first controller MCU1 and the second controller MCU2 have a single transmission channel, and the first controller MCU1 and the second controller MCU2 transmit and receive in half-duplex mode on the transmission channel.

[0049] In the above embodiment, the energy storage battery 20 includes a second controller MCU2. A single transmission channel exists between the first controller MCU1 and the second controller MCU2, and the first controller MCU1 and the second controller MCU2 transmit and receive data in half-duplex mode on this transmission channel. This communication scheme minimizes the number of pins required for the connector between the power bank 2 and the base 1, simplifying the hardware interface. In a system with multiple power banks 2 connected in parallel, it significantly reduces the complexity and cost of the connectors while meeting the necessary data exchange requirements, achieving economical and reliable inter-module communication.

[0050] like Figure 6 As shown, the second aspect of this application provides an uninterruptible power supply device 200, which includes the uninterruptible power supply equipment 100 provided in any of the above embodiments. Therefore, it can achieve all the same technical effects. To avoid repetition, it will not be described again here.

[0051] In the claims, description, and accompanying drawings of this application, the term "plural" refers to two or more objects. Unless otherwise explicitly defined, the terms "upper," "lower," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used solely for the convenience of describing this application and simplifying the descriptive process, and are not intended to indicate or imply that the device or element referred to must have the described specific orientation, or be constructed and operated in a specific orientation. Therefore, these descriptions should not be construed as limitations on this application. The terms "connection," "installation," "fixing," etc., should be interpreted broadly. For example, "connection" can be a fixed connection between multiple objects, a detachable connection between multiple objects, or an integral connection; it can be a direct connection between multiple objects or an indirect connection between multiple objects through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in this application can be understood based on the specific circumstances described above.

[0052] In the claims, description, and accompanying drawings of this application, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this application. In the claims, description, and accompanying drawings of this application, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0053] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. An uninterruptible power supply device, characterized in that, include: Power grid bus; Energy storage batteries; A charge-discharge conversion unit, the first end of which is coupled to the energy storage battery, is used to control the energy storage battery to charge using the grid voltage when there is grid voltage on the grid bus, and to control the energy storage battery to discharge to the grid bus when there is no grid voltage on the grid bus. The first transistor body diode has its source coupled to the first terminal of the charge-discharge conversion unit and its drain coupled to the power grid bus. It is used to conduct during the charge-discharge conversion of the charge-discharge conversion unit to deliver the voltage of the energy storage battery to the power grid bus.

2. The uninterruptible power supply device according to claim 1, characterized in that, Also includes: An adapter, wherein the input terminal of the adapter is coupled to the power grid and the output terminal of the adapter is coupled to the power grid bus, for converting the power grid voltage from AC voltage to DC voltage; An inverter, the input of which is coupled to the power grid bus and the output of which is coupled to the load, is used to convert the DC voltage on the power grid bus into AC voltage to power the load.

3. The uninterruptible power supply device according to claim 1, characterized in that, Also includes: An inductor, wherein a first end of the inductor is coupled to a first end of a charge-discharge conversion unit, and a second end of the inductor is coupled to the source of the body diode of the first transistor; The drain of the second transistor body diode is coupled to the source of the first transistor body diode, and the source of the second transistor body diode is coupled to the second terminal of the charge-discharge conversion unit.

4. The uninterruptible power supply device according to claim 3, characterized in that, The first transistor body diode is a first metal-oxide-semiconductor transistor, and the second transistor body diode is a second metal-oxide-semiconductor transistor. The switch control terminal of the charge-discharge conversion unit is coupled to the source of the body diode of the first transistor, and the drive terminal of the charge-discharge conversion unit is coupled to the gate of the first metal-oxide-semiconductor transistor and the gate of the second metal-oxide-semiconductor transistor.

5. The uninterruptible power supply device according to claim 1, characterized in that, The charge-discharge conversion unit includes a first controller and a DC-DC converter coupled to the first controller; The first controller detects the grid voltage on the grid bus. When the grid voltage is present on the grid bus, it controls the DC-DC converter to operate in buck mode, stepping down the grid voltage to the supply voltage of the energy storage battery to supply power to the energy storage battery. When the grid voltage is absent on the grid bus, it controls the DC-DC converter to operate in boost mode, stepping up the output voltage of the energy storage battery to the grid voltage and outputting it to the grid bus.

6. The uninterruptible power supply device according to claim 5, characterized in that, The energy storage battery is a plurality of pluggable power banks on the base, and the DC-DC converter is a plurality of DC-DC converters respectively coupled to the plurality of power banks.

7. The uninterruptible power supply device according to claim 6, characterized in that, The base has multiple power bank ports for connecting to multiple power banks. The first controller detects the status of multiple power bank interfaces. When it detects that a power bank interface has started to connect to the power bank, it wakes up the power bank and uses the output voltage of the power bank to power the first controller.

8. The uninterruptible power supply device according to claim 7, characterized in that, The first controller detects the status of multiple power bank interfaces, and when it detects that the power bank interface has started to connect or disconnect from the power bank, it reallocates the output power of each power bank inserted on the base.

9. The uninterruptible power supply device according to claim 5, characterized in that, The energy storage battery includes a second controller, and the first controller and the second controller have a single transmission channel on the transmission channel, on which the first controller and the second controller transmit and receive in a half-duplex manner.

10. An uninterruptible power supply device, characterized in that, include: The uninterruptible power supply device as described in any one of claims 1 to 9.

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