A power supply device and a power supply system

Abstract

The application relates to the charging technical field, and provides a power supply device and a power supply system. The power supply device provided by the application comprises an energy storage connecting end, the energy storage connecting end is suitable for being connected with an energy storage module and a conversion module, a first end of the conversion module is connected with the energy storage connecting end, and the conversion module is used for converting the voltage and / or the power form input by the energy storage connecting end.

Description

Technical Field

[0001] This application relates to the field of charging technology, and in particular to a power supply device and power supply system. Background Technology

[0002] To adapt to mobile energy storage and zero-grid scenarios, mobile energy storage or grid-independent energy storage and charging systems for vehicles have been introduced. Their high-voltage side does not require grid output power, which can be provided by the energy storage. The energy storage and charging systems for these vehicles all require low voltage from the energy storage cabinet, necessitating the installation of a transformer within the cabinet. Transformers suffer from high energy loss and low transmission efficiency. Summary of the Invention

[0003] This application aims to solve the problems in related technologies and proposes a power supply device and power supply system.

[0004] This application provides a power supply device, including:

[0005] Energy storage connection terminal, which is suitable for connection to energy storage module;

[0006] The conversion module has its first end connected to the energy storage connection terminal. The conversion module is used to convert the voltage and / or form of electrical energy input to the energy storage connection terminal.

[0007] In some alternative embodiments, the power supply device further includes a starting module for starting the energy storage power supply. The first end of the starting module is connected to the energy storage connection end, and the fourth end of the conversion module is connected to the second end of the starting module.

[0008] In some alternative embodiments, the power supply device further includes a grid connection terminal adapted to connect to the power grid, and a second end of the conversion module is connected to the grid connection terminal;

[0009] And / or, the power supply device also includes a terminal connection, which is adapted to output voltage, and the third terminal of the conversion module is connected to the terminal connection.

[0010] In some alternative implementations, the conversion module includes a first AC transformer, with a first terminal of the first AC transformer connected to an energy storage connection terminal;

[0011] And / or, the conversion module also includes a first DC transformer, the first end of which is connected to the energy storage connection terminal.

[0012] In some alternative implementations, a first terminal of the first DC transformer is connected to a first terminal of the first AC transformer;

[0013] And / or, the conversion module further includes a first switch, a first end of which is connected to a terminal connection terminal, a second end of which is connected to a power grid connection terminal, and a third end of which is connected to a second end of a first AC transformer; the first switch is used to connect the terminal connection terminal to the power grid connection terminal, or to connect the second end of the first AC transformer to the power grid connection terminal;

[0014] And / or, the first AC transformer is an on-board charger.

[0015] In some alternative embodiments, the power supply device further includes a mobile connection terminal adapted to connect to a mobile energy storage device, the mobile connection terminal being connected to a first switch, and the mobile connection terminal being connected to a fifth terminal of the conversion module.

[0016] In some alternative implementations, the starting module includes a second DC transformer, with a first end of the second DC transformer connected to an energy storage connection end and a second end of the second DC transformer connected to a first end of the conversion module.

[0017] And / or, the power supply device also includes a host load, the first end of which is connected to the sixth end of the conversion module;

[0018] And / or, the power supply device includes a second AC transformer, the input terminal of which is connected to the energy storage connection terminal, and the output terminal of which is connected to the terminal connection terminal.

[0019] In some alternative implementations, the startup module further includes a startup switch for controlling the connection between the second DC transformer and the energy storage connection terminal.

[0020] In some alternative embodiments, the power supply device further includes a second switch, the first end of which is connected to an energy storage connection terminal, and the second end of which is connected to a second AC transformer.

[0021] In some alternative embodiments, the power supply device further includes a controller connected to the conversion module, the controller being configured to control the power supply device in at least one of the following modes: grid power supply mode, energy storage power supply mode, and mobile power supply mode.

[0022] In some alternative implementations, the grid power supply mode is as follows: the second end of the conversion module is connected to the grid connection end, and the third end of the conversion module is connected to the terminal connection end; or, the energy storage power supply mode is as follows: the first end of the conversion module is connected to the energy storage connection end, and the third end of the conversion module is connected to the terminal connection end; or, the mobile power supply mode is as follows: the fifth end of the conversion module is connected to the mobile connection end, and the third end of the conversion module is connected to the terminal connection end.

[0023] This application also provides a power supply system, including an energy storage module and the power supply device, wherein the power supply device is connected to the energy storage module.

[0024] In some alternative implementations, the energy storage module includes an energy storage unit connected to the conversion module;

[0025] And / or, the power supply system also includes a terminal module, the input of which is connected to the terminal connection terminal.

[0026] In some alternative implementations, the energy storage module also includes a safety unit disposed between the energy storage unit and the conversion module.

[0027] In summary, this application can achieve at least the following technical effects:

[0028] The power supply device of this application is connected to the energy storage connection terminal through the first end of the conversion module. The conversion module is used to convert the voltage magnitude and / or form of electrical energy input to the energy storage connection terminal, thereby realizing the emergency start function of the power supply device under the condition of no low voltage input. This allows the energy storage connection terminal of the power supply device to directly draw constant power, ensuring the stability of the power supply, improving the transmission efficiency and compatibility of the power supply device. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the power supply module in the embodiments of this application. Figure 1 ;

[0030] Figure 2 This is a schematic diagram of the power supply module in the embodiments of this application. Figure 2 ;

[0031] Figure 3 This is a schematic diagram of the first step of the energy storage power supply mode in the embodiments of this application;

[0032] Figure 4 This is a schematic diagram of the second step of the energy storage power supply mode in the embodiments of this application;

[0033] Figure 5 This is a schematic diagram of the reverse pre-charging of the second AC transformer in an embodiment of this application;

[0034] Figure 6 This is a schematic diagram of the power grid supply mode in the embodiments of this application;

[0035] Figure 7 This is a schematic diagram of the mobile power supply mode in an embodiment of this application;

[0036] Figure 8 This is a schematic diagram of the startup module in an embodiment of this application;

[0037] Figure 9 This is a schematic diagram of the OBC in the embodiments of this application;

[0038] Figure 10 This is a schematic diagram of the DC-DC converter in the embodiments of this application;

[0039] Figure 11 This is a schematic diagram of ACDC in the embodiments of this application.

[0040] Figure label:

[0041] 100. Power supply module; 1. Grid connection terminal; 2. Grid switch; 3. Second AC transformer; 4. First switch; 5. Auxiliary power source; 6. Main unit load; 7. Vehicle DC / OBC; 8. Starting module; 81. Second DC transformer; 82. Starting switch; 10. Mobile connection terminal; 9. Fuse unit; 11. Discharge vehicle; 31. Energy storage module; 32. Terminal module; 33. Energy storage unit;

[0042] 20. Conversion module; 21. First end of conversion module; 22. Second end of conversion module; 23. Third end of conversion module; 24. Fourth end of conversion module; 25. Fifth end of conversion module; 26. Sixth end of conversion module. Detailed Implementation

[0043] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application.

[0044] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0045] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0046] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0047] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0048] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, 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. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0049] To adapt to mobile energy storage and zero-grid scenarios, related technologies have emerged, including mobile energy storage and grid-independent energy storage charging systems. However, these systems all have limitations. Although the high-voltage side does not require grid output power and is entirely provided by energy storage, it still relies on grid output to power the entire low-voltage system. Alternatively, a solution using additional small batteries, such as lead-acid batteries, can be employed to power the low-voltage system. While these solutions can achieve the function of powering the low-voltage system, lead-acid batteries have small capacity, resulting in higher overall costs and a tendency to run out of power, causing the entire system to malfunction. These limitations are significant.

[0050] Example 1:

[0051] like Figure 1 As shown, Embodiment 1 of this application provides a power supply device 100, including:

[0052] Energy storage connection terminal, which is adapted to be connected to energy storage module 31;

[0053] Start-up module 8 is used to start the energy storage power supply. The first end of start-up module 8 is connected to the energy storage connection end.

[0054] The conversion module 20 has a first end 21 connected to the energy storage connection end and a fourth end 24 connected to the second end of the starting module 8. The conversion module 20 is used to convert the voltage and / or form of electrical energy input to the energy storage connection end.

[0055] The first end of the conversion module 20 is connected to the energy storage connection end. The conversion module 20 is used to convert the voltage magnitude and / or form of electrical energy input to the energy storage connection end, thereby realizing the emergency start function of the power supply device 100 under the condition of no low voltage input. This allows the energy storage connection end of the power supply device 100 to directly draw constant power, ensuring the stability of the power supply of the power supply device 100, improving the transmission efficiency and the compatibility of the power supply device.

[0056] The conversion module 20 is used to convert the voltage input to the energy storage connection terminal. That is, the conversion module 20 boosts or bucks the input voltage before outputting it, thus achieving a difference between the input and output voltage magnitudes. The conversion module 20 is also used to convert the form of electrical energy input to the energy storage connection terminal; that is, the conversion module 20 converts the form of electrical energy at the input terminal to the form of electrical energy at the output terminal. The form of electrical energy generally refers to the way electrical energy exists in different physical states or forms. In the fields of science and engineering, electrical energy is mainly used as a medium for energy conversion and transmission, but its specific form can vary depending on the application scenario. Typically, electrical energy is mainly manifested in the form of electric current, such as direct current, alternating current, or high-frequency current, and can be converted between each other.

[0057] The bidirectional topology of the conversion module 20 supports the free flow of energy between the grid, energy storage, and load, meeting the dynamic needs of mobile energy storage systems in multiple scenarios such as emergency response, off-grid operation, and peak-valley arbitrage.

[0058] In some alternative embodiments, the power supply device further includes a starting module for starting the energy storage power supply. The first end of the starting module is connected to the energy storage connection end, and the fourth end of the conversion module 20 is connected to the second end of the starting module.

[0059] By using the starting module 8 located between the energy storage connection terminal and the fourth terminal of the conversion module 20, the starting module 8 can convert the high voltage of the energy storage connection terminal into a low voltage and supply it to the conversion module 20. This enables the power supply device 100 to perform emergency startup under conditions of no low-voltage input, allowing the energy storage connection terminal of the power supply device 100 to directly draw constant power, ensuring the stability of the power supply of the power supply device 100, improving transmission efficiency, and enhancing the compatibility of the power supply device 100. The starting module 8 can be a DC-DC converter.

[0060] By directly connecting the start-up module 8 between the energy storage connection terminal and the conversion module 20, energy can be directly extracted from the high-voltage energy storage bus (300V-1000V) and efficiently converted into low-voltage DC power (12V-48V) required by the control circuit. This allows the control logic of the conversion module 20 to be activated autonomously without external low-voltage auxiliary power, solving the fatal flaw of traditional systems that cannot start due to a lack of power to the control circuit. This design abandons the traditional structure of using a high-power industrial frequency transformer in the energy storage cabinet for high-voltage to low-voltage conversion, avoiding the problem of efficiency below 85% caused by the superposition of iron and copper losses. This increases the energy conversion efficiency during the start-up phase to over 94%. Furthermore, because the start-up module 8 only operates during startup and disconnects in steady state, the standby power consumption is less than 1W, significantly improving the energy efficiency ratio of the power supply device 100.

[0061] In some alternative embodiments, the power supply device 100 further includes a power grid connection terminal 1, which is adapted to connect to the power grid, and the second terminal 22 of the conversion module 20 is connected to the power grid connection terminal 1.

[0062] The power grid connection terminal 1 can be connected to the mains power (AC 220V / 380V). After the conversion module 20 adjusts the path, and then the auxiliary power source 5 adjusts the voltage, it outputs low-voltage DC power to the main load 6, so as to realize the normal operation of the load inside the power supply device 100.

[0063] In some alternative embodiments, the power supply device 100 further includes a terminal connection end adapted to output voltage, and the third terminal 23 of the conversion module 20 is connected to the terminal connection end.

[0064] This structure enables bidirectional energy routing across three ports: The grid connection port 1 can connect to mains power (AC 220V / 380V). After the path is adjusted by the conversion module 20, AC power is output to the terminal connection port to supply power to the load within the energy storage module, ensuring its normal operation, or to the load within the terminal module, ensuring its normal operation, thus achieving grid power supply functionality. In off-grid scenarios, the high-voltage DC at the energy storage connection port is inverted into AC power by the conversion module 20 and supplied to the terminal connection port to supply power to the load within the terminal module, ensuring its normal operation, thus achieving energy storage power supply functionality.

[0065] In some alternative implementations, the conversion module 20 includes a first AC transformer, the first end of which is connected to an energy storage connection terminal.

[0066] like Figure 2 As shown, the first end of the first AC transformer is directly connected to the high-voltage DC bus of the energy storage connection end. The high-frequency AC signal is converted into a high-frequency AC signal by the full-bridge inverter and output from the second end of the first AC transformer. The high-frequency AC signal is then transmitted to the terminal connection end or auxiliary power source 5.

[0067] The high-frequency AC signal from the mobile connection terminal 10 is input at the second terminal of the first AC transformer. It is converted into a high-voltage DC signal by the full-bridge inverter and then output from the first terminal of the first AC transformer to the first DC transformer. After being stepped down by the first DC transformer, a low-voltage DC signal is output to the energy storage connection terminal or the host load 6.

[0068] The first AC transformer can adopt a high-frequency soft-switching LLC topology. This structure eliminates the bulky iron core and low-frequency hysteresis loss of traditional power frequency transformers. It uses nanocrystalline soft magnetic materials and planar transformer technology, which has the advantages of small size and high efficiency.

[0069] In some alternative implementations, the conversion module 20 further includes a first DC transformer, the first end of which is connected to the energy storage connection terminal.

[0070] like Figure 10 As shown, the first DC transformer can be a bidirectional isolated DC-DC converter. The first end of the first DC transformer is connected to the energy storage connection end. The high-voltage DC signal input to the energy storage connection end is converted by the first DC transformer and output as a low-voltage DC signal. The second end of the first DC transformer is connected to the third end of the host load 6, thereby ensuring the normal operation of the host load 6 in the power supply device 100.

[0071] In some alternative implementations, a first terminal of the first DC transformer is connected to a first terminal of the first AC transformer.

[0072] The second terminal of the first DC transformer is connected to the second terminal of the first AC transformer. The high-voltage DC signal output from the second terminal of the first AC transformer is input from the first terminal of the first DC transformer and then outputs a low-voltage DC signal through the second terminal of the first DC transformer, thereby enabling the mobile energy storage device to provide low-voltage current to the host load 6.

[0073] The low-voltage DC signal output from the second end of the first DC transformer can also be transmitted to the circuit board inside the conversion module 20 to power the circuit board, thereby realizing the full start-up of the low-voltage part of the power supply device 100.

[0074] In some optional embodiments, the conversion module 20 further includes a first switch 4, the first end of the first switch 4 being connected to the terminal connection terminal, the second end of the first switch 4 being connected to the power grid connection terminal 1, and the third end of the first switch 4 being connected to the second end of the first AC transformer; the first switch 4 is used to realize the connection between the terminal connection terminal and the power grid connection terminal 1, or to realize the connection between the second end of the first AC transformer and the power grid connection terminal 1.

[0075] The first switch 4 can be a double-pole double-throw solid-state relay, with its moving contacts connected to the mains connection terminal 1 and the first terminal of the first AC transformer, and its stationary contacts connected to the terminal connection terminal. When the first switch 4 is switched to the "terminal connection terminal - mains connection terminal 1" path, the power supply device 100 enters the mains power supply mode. When switched to the "second terminal of the first AC transformer - terminal connection terminal" path, the power supply device 100 enters the energy storage charging mode, and the high-voltage DC power from the energy storage module 31 is rectified by the first AC transformer to power the load inside the terminal module.

[0076] In some alternative embodiments, the power supply device 100 further includes a mobile connection terminal 10, which is adapted to connect to a mobile energy storage device. The mobile connection terminal 10 is connected to the first switch 4 and to the fifth terminal 25 of the conversion module 20.

[0077] The mobile connection terminal 10 can adopt a standard AC charging and discharging interface, which can be connected to an external mobile energy storage vehicle or portable energy storage power supply. When an external mobile energy storage device is connected, the controller detects the output voltage and polarity of the external mobile energy storage device. If it meets the system access conditions, it automatically closes the path from the first switch 4 to the mobile connection terminal 10, allowing the external mobile energy storage device to supply power to the terminal connection terminal through the conversion module 20, thereby supplying power to the load inside the terminal module 280, ensuring the normal operation of the terminal module 280, and realizing the mobile power supply mode. This design provides more charging options for the discharge vehicle 11 in cases where the energy storage module 31 has insufficient power, the grid power supply is unstable, or there is no grid, improving the convenience of using the power supply device 100.

[0078] In some alternative implementations, the first AC transformer is an on-board charger.

[0079] like Figure 9 As shown, the first AC transformer is an on-board charger, and the first DC transformer is a DC-DC converter. At this time, the existing integrated on-board DC / OBC7 can be directly used, which effectively reduces the size of the power supply device 100, reduces the R&D cost, and improves the device's adaptability and assembly efficiency.

[0080] In some alternative implementations, the start-up module 8 includes a second DC transformer 3, with a first end of the second DC transformer 3 connected to an energy storage connection end and a second end of the second DC transformer 3 connected to a first end of the conversion module 20.

[0081] like Figure 11 As shown, the second DC transformer 3 can be a miniature high-frequency isolated DC-DC module. Through GaN power devices and magnetic integration technology, the first end of the second DC transformer 3 is connected to the energy storage connection end, and the second end of the second DC transformer 3 is connected to the conversion module 20 to provide startup power for the MCU, driver IC, and communication module. By switching the first switch 4 to "terminal connection end - grid connection end 1", power is supplied to the load in the terminal module through the terminal connection end, ensuring the normal operation of the terminal module under extreme environments such as insufficient grid power supply or no grid input.

[0082] In some alternative implementations, the start-up module 8 further includes a start-up switch 82, which controls the connection between the second DC transformer 3 and the energy storage connection terminal.

[0083] The start switch 82 can be a mechanical self-locking button, installed in a conspicuous position on the equipment casing, with a normally open dry contact connected in series inside to control the MOSFET switch on the input side of the second DC transformer 3. In the event of a power grid failure, manually pressing the button allows the high voltage of the energy storage module 31 to supply power to the conversion module 20 via the second DC transformer 3, achieving "physical-level forced wake-up".

[0084] like Figure 8 As shown, the main function of the start-up module is to provide a 12V wake-up power supply. The start-up module draws constant power from the energy storage connection terminal. After the start switch 82 is pressed, the second DC transformer 3 converts the high-voltage DC power (e.g., 580V-850V) input from the energy storage connection terminal into low-voltage DC power (e.g., 12V-48V). First, the start-up module provides low-voltage DC power to the conversion module 20 to wake it up. After the conversion module 20 is operational, the start-up module controls the second switch to close, then outputs 12V from the third terminal 23 and 220V from the sixth terminal 26 of the conversion module 20, thus replacing the power supply from the start-up module. Therefore, the start-up module 8 completes the emergency start-up function under conditions where the low-voltage system is not operating and there is no low-voltage power input.

[0085] In some alternative embodiments, the power supply device 100 further includes a host load 6, the first end of which is connected to the sixth end 26 of the conversion module 20.

[0086] The first terminal of the main load 6 is connected to the sixth terminal 26 of the conversion module 20, the second terminal of the main load 6 is connected to the output terminal of the auxiliary power source 5, and the input terminal of the auxiliary power source 5 is connected to the third terminal 23 of the conversion module 20. The auxiliary power source 5 is used to convert the high voltage at its input terminal to a low voltage. The main load 6 is an auxiliary device inside the charging pile, including the main control unit, communication module, human-machine interface screen, and cooling fan. Its rated operating voltage is usually low voltage, and it is directly powered by the low voltage DC bus output from the DC-DC converter in the switching module, ensuring that the system status recording and safe shutdown process can still be maintained after the power grid is cut off.

[0087] The third terminal of the main load 6 is connected to the second terminal of the first DC transformer, thereby providing a low-voltage DC signal to the main load 6 through the first DC transformer. This enables the energy storage module 31 to supply low-voltage power to the main load 6, or to supply power to the main load 6 through a mobile energy storage device.

[0088] In some alternative embodiments, the power supply device 100 includes a second AC transformer 3, the input terminal of which is connected to an energy storage connection terminal, and the output terminal of which is connected to a terminal connection terminal.

[0089] To accommodate special terminals requiring AC output (such as mobile charging vehicles or temporary emergency lighting), the power supply unit 100 also includes a second AC transformer 3 (ACDC). The ACDC is a high-frequency isolation inverter transformer. Its primary side is connected to the DC output terminal of the energy storage module 31, and its secondary side outputs 220V / 50Hz sinusoidal AC power, which, after LC filtering, is connected to the terminal connection terminal to achieve energy storage power supply mode. When in energy storage power supply mode, the controller activates the ACDC to provide a stable power supply to the loads within the terminal modules that require AC input, ensuring the normal operation of the terminal modules.

[0090] A power grid switch 2 is also provided between the power grid connection terminal 1 of the power supply device 100 and the ACDC, so as to disconnect the circuit between the power grid connection terminal 1 and the ACDC when necessary. At the same time, the power grid switch 2 is located between the power grid connection terminal 1 and the first switch 4, thereby ensuring that the signal output by the ACDC can be transmitted to the terminal connection terminal through the first switch 4.

[0091] The startup module 8 also includes an emergency controller, which is configured to control the startup switch to close after the conversion module 20 is started.

[0092] In some alternative embodiments, the power supply device 100 further includes a second switch, the first end of which is connected to an energy storage connection terminal, and the second end of which is connected to a second AC transformer.

[0093] In some alternative embodiments, the power supply device 100 further includes a controller connected to the conversion module 20, the controller being configured to control the power supply device 100 in at least one of the following modes: grid power supply mode, energy storage power supply mode, and mobile power supply mode.

[0094] The controller can use a high-reliability industrial-grade MCU with an ARM Cortex-M7 core and a built-in dual-channel ADC for real-time sampling of grid voltage, current, frequency, and energy storage module 31SOC and voltage status.

[0095] The controller can determine the power supply status through a preset algorithm: when the current voltage of the power grid is less than the preset voltage, such as the preset voltage being 85% or 115% of the rated voltage, and continues for more than a preset time, such as 100ms, 200ms, or 300ms, it is determined that the power grid is abnormal and the energy storage power supply mode is switched; or, the controller can determine the power supply status through a preset algorithm if the current charging frequency of the power grid deviates from the preset frequency by a certain value, such as ±1Hz, and continues for more than a preset time, it is determined that the power grid is abnormal and the energy storage power supply mode is switched.

[0096] The switching logic can adopt a "disconnect first, connect later" strategy to ensure that after disconnecting the grid path, the energy storage path is connected after a 5ms dead zone delay to avoid short circuits.

[0097] The controller can also integrate a soft-start function, which increases the output voltage in a linear ramp manner when the energy storage power supply starts, preventing surge current from impacting the host load. In addition, the controller supports remote communication and can upload power supply mode switching events, remaining energy storage capacity, and fault codes to the cloud platform to realize operation and maintenance early warning and remote diagnosis.

[0098] In some alternative implementations, the grid power supply mode is as follows: the second end of the conversion module 20 is connected to the grid connection terminal 1, and the third end of the conversion module 20 is connected to the terminal connection terminal; or, the energy storage power supply mode is as follows: the first end of the conversion module 20 is connected to the energy storage connection terminal, and the third end of the conversion module 20 is connected to the terminal connection terminal; or, the mobile power supply mode is as follows: the fifth end of the conversion module 20 is connected to the mobile connection terminal 10, and the third end of the conversion module 20 is connected to the terminal connection terminal.

[0099] The energy storage connection includes an energy storage output terminal and an energy storage input terminal.

[0100] In the grid power supply mode, the first switch 4 in the conversion module 20 connects the grid connection terminal 1 and the terminal connection terminal, so that the AC power input from the grid is transmitted to the terminal connection terminal after being connected by the first switch 4, thereby realizing the power supply to the load inside the terminal module. At the same time, the AC power input from the grid is transmitted to the energy storage input terminal after being connected by the first switch 4, thereby realizing the charging of the energy storage module 31 by the grid. When the grid can provide a stable power supply, it stores energy for the energy storage module 31, thereby ensuring that the energy storage module 31 has sufficient energy for unforeseen needs.

[0101] In the energy storage power supply mode, the first switch 4 in the conversion module 20 connects the energy storage connection terminal and the terminal connection terminal. The first AC transformer converts the high-voltage DC signal input from the energy storage input terminal into a high-voltage AC signal and outputs it to the terminal connection terminal and / or the energy storage output terminal, thereby realizing the energy storage power supply mode and supplying power to the energy storage module 31; the first DC transformer operates in step-down mode, converting the high-voltage DC signal input from the energy storage input terminal into a low-voltage DC signal and outputting it to the host load 6, thereby realizing low-voltage power supply within the power supply device 100.

[0102] In the mobile power supply mode, the first switch 4 in the conversion module 20 connects the mobile connection terminal 10 and the terminal connection terminal, so that the AC power input to the mobile connection terminal 10 is transmitted to the terminal connection terminal after being connected by the first switch 4, thereby realizing mobile power supply for the load inside the terminal module. The first AC transformer converts the high-voltage AC signal input to the mobile connection terminal 10 into a high-voltage DC signal and outputs it to the energy storage output terminal, thereby realizing power supply for the energy storage module 31; the first DC transformer operates in step-down mode, converting the high-voltage DC signal output by the first AC transformer into a low-voltage DC signal and outputting it to the host load 6, thereby realizing low-voltage power supply within the power supply device 100.

[0103] like Figure 3 The diagram illustrates the first step of the power supply device 100 entering energy storage power supply mode under conditions of grid instability or absence. Initially, the power supply device 100 is in sleep mode, with neither the high-voltage nor low-voltage systems operating, and the grid disconnected. The first switch 4 connects the energy storage connection terminal to the terminal connection terminal. After the start switch 82 is connected (which can be a push-button operation), the start module 8 draws constant power from the energy storage module 31, first waking up the conversion module 20, and then controlling the second switch to close, thereby connecting the high-voltage path between the energy storage module 31 and the conversion module 20.

[0104] like Figure 4As shown, this is the second step of the power supply device 100 entering the energy storage power supply mode under the condition of unstable or no power grid. After receiving the low-voltage input activation from the start-up module and the high-voltage input operation from the energy storage module 31, the conversion module 20 outputs low voltage and high voltage. The low-voltage output can supply power to the host load 6 and complete the low-voltage power supply to the circuit board of the conversion module 20, realizing the full start of the low-voltage part of the overall system; the high-voltage output can supply power to the terminal module 32 and the energy storage module 31.

[0105] like Figure 5 As shown, the reverse pre-charging scheme for the second DC transformer 3 is as follows. Since the second DC transformer 3 requires reverse pre-charging in charging mode, after all the low-voltage systems within the power supply unit 100 are started, the second switch can be closed to directly pre-charge the second DC transformer 3 using the energy storage module 31. This eliminates the need for an additional pre-charging board or reverse pre-charging via DC-DC converters, saving costs and extending equipment lifespan. The charging mode of the second DC transformer 3 is as follows: the second DC transformer is connected to the power output terminal of the power supply unit 200, which is connected to the terminal module. The current input from the power output terminal 230 to the terminal module 280 charges the vehicle to be charged, thus realizing the charging of the vehicle from the power grid.

[0106] like Figure 6 The diagram illustrates the process of switching from energy storage power supply mode to grid power supply mode when there is grid power or when the grid suddenly gains power. At this time, after the first switch 4 detects power at the grid connection terminal 1, it switches to the grid side. The grid provides 220V to the energy storage module 31 and the terminal module 32, and supplies power to the main load 6 through the auxiliary power source 5.

[0107] like Figure 7 The diagram shown is a circuit diagram of the mobile power supply mode after the external discharge vehicle 11 is connected. The scheme of supplying power to the entire power supply device 100 through the first switch 4 provides high voltage power to the entire system through the mobile connection terminal 10, and outputs low voltage power to the corresponding load through the conversion module 20. It can also directly charge the energy storage module 31 and supply power to the terminal module 32 through the conversion module 20.

[0108] Example 2:

[0109] Embodiment 2 of this application provides a power supply system, including an energy storage module 31 and a power supply device 100, wherein the power supply device 100 is connected to the energy storage module 31.

[0110] By deeply integrating the aforementioned power supply device 100 with the energy storage module 31, an integrated energy management unit is formed. The energy storage module 31 may contain lithium iron phosphate battery cells, achieving high power output capability through a series-parallel topology. The switching module of the power supply device 100 can be directly connected to the high-voltage output terminal of the energy storage module 31, forming a "plug-and-play" connection structure without the need for additional wiring.

[0111] In some alternative implementations, the energy storage module 31 includes an energy storage unit 33, which is connected to the conversion module 20.

[0112] The energy storage unit 33 can be composed of multiple lithium iron phosphate cells. The output terminal of the energy storage unit 33 can be connected to the energy storage connection terminal of the power supply device 100 via a fuse or a contactor. The contactor is controlled by the controller and closes after a delay when the system starts up to avoid inrush current.

[0113] In some alternative implementations, the power supply system further includes a terminal module 32, the input of which is connected to a terminal connection terminal.

[0114] Terminal module 32 is the energy interface between the power supply device and the electric vehicle, and its input end is directly connected to the terminal connection end of the power supply device 100.

[0115] The terminal module 32 integrates a voltage / current sampling circuit, a communication protocol controller, an insulation detection unit, and a contactor drive circuit. When the power supply device 100 switches to energy storage power supply mode, the terminal module 32 automatically identifies changes in the input voltage and dynamically adjusts the charging current curve to ensure constant power output even as the energy storage voltage drops. For example, when the energy storage voltage drops from 380V to 320V, the terminal module 32 gradually increases the charging current from 80A to 95A to maintain a 30kW output and extend the effective charging time. This design significantly improves charging efficiency under energy storage power supply and avoids a sudden drop in charging power due to voltage decreases.

[0116] In some alternative implementations, the energy storage module 31 includes a safety unit 9 disposed between the energy storage module 33 and the conversion module 20.

[0117] The fuse is used to handle extreme faults such as short circuits, while the EPC monitors the rate of change of current (di / dt) in real time. When the current abnormally rises to a threshold (e.g., 1000A / ms), it triggers the IGBT to turn off within 50μs, achieving "millisecond-level" protection. This fuse ensures that secondary fires do not occur in accident scenarios such as collisions and water immersion.

[0118] The fuse unit 9 can consist of two sets of high-voltage DC fuses connected in series and an electronic overcurrent protector (EPC).

[0119] In some alternative implementations, the terminal module 32 includes a fast charging terminal and a flash charging terminal.

[0120] Fast charging terminals are suitable for passenger cars and light commercial vehicles, and can adopt a dual-gun independent control architecture, supporting a maximum DC output of 120kW, with each gun capable of outputting 60kW. Flash charging terminals support ultra-high-speed charging (e.g., 350kW), and can internally integrate liquid-cooled cables, active temperature control contactors, or multi-stage capacitor buffer circuits. Figure 1 , Figure 2 As shown, terminal 1 is a fast charging terminal, and terminal 2 is a flash charging terminal.

[0121] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. A power supply device (100), characterized in that, include: Energy storage connection terminal, the energy storage connection terminal being adapted to be connected to the energy storage module (31); A conversion module (20) is provided, the first end (21) of which is connected to the energy storage connection end. The conversion module (20) is used to convert the voltage magnitude and / or form of electrical energy input to the energy storage connection end.

2. The power supply device (100) as described in claim 1, characterized in that, The power supply device also includes a starting module (8), which is used to start the energy storage module (31) to supply power. The first end of the starting module (8) is connected to the energy storage connection end, and the fourth end (24) of the conversion module (20) is connected to the second end of the starting module (8).

3. The power supply device (100) as described in claim 1, characterized in that, The power supply device (100) further includes a power grid connection terminal (1), which is adapted to connect to the power grid, and the second end (22) of the conversion module (20) is connected to the power grid connection terminal (1); And / or, the power supply device (100) further includes a terminal connection end adapted to output voltage, and the third terminal (23) of the conversion module (20) is connected to the terminal connection end.

4. The power supply device (100) as described in claim 3, characterized in that, The conversion module (20) includes a first AC transformer, and the first end of the first AC transformer is connected to the energy storage connection end; The conversion module (20) also includes a first DC transformer, the first end of which is connected to the energy storage connection end.

5. The power supply device (100) as described in claim 4, characterized in that, The first terminal of the first DC transformer is connected to the first terminal of the first AC transformer; And / or, the conversion module (20) further includes a first switch (4), the first end of the first switch (4) being connected to the terminal connection terminal, the second end of the first switch (4) being connected to the power grid connection terminal (1), and the third end of the first switch (4) being connected to the second end of the first AC transformer; the first switch (4) is used to realize the connection between the terminal connection terminal and the power grid connection terminal (1), or to realize the connection between the second end of the first AC transformer and the power grid connection terminal (1); And / or, the first AC transformer is an on-board charger.

6. The power supply device (100) as described in claim 5, characterized in that, The power supply device (100) further includes a mobile connection terminal (10), which is adapted to connect a mobile energy storage device and is connected to the first switch (4).

7. The power supply device (100) as described in claim 2, characterized in that, The starting module (8) includes a second DC transformer (81), the first end of which is connected to the energy storage connection end, and the second end of which is connected to the first end of the conversion module (20). And / or, the power supply device (100) includes a second AC transformer (3), the input terminal of the second AC transformer (3) is connected to the energy storage connection terminal, and the output terminal of the second AC transformer (3) is connected to the terminal connection terminal; And / or, the power supply device (100) further includes a host load (6), the first end of which is connected to the sixth end (26) of the conversion module (20).

8. The power supply device (100) as described in claim 7, characterized in that, The starting module (8) also includes a starting switch (82), which is used to control the connection between the second DC transformer (81) and the energy storage connection terminal. And / or, the power supply device (100) further includes a second switch, the first end of which is connected to the energy storage connection terminal, and the second end of which is connected to the second AC transformer (3).

9. The power supply device (100) as described in any one of claims 6-8, characterized in that, The power supply device (100) further includes a controller connected to the conversion module (20), and the controller is configured to control the power supply device (100) to be in at least one of the following modes: grid power supply mode, energy storage power supply mode, and mobile power supply mode.

10. The power supply device (100) as described in claim 9, characterized in that, The grid power supply mode is as follows: the second end of the conversion module (20) is connected to the grid connection end (1), and the third end of the conversion module (20) is connected to the terminal connection end; or, the energy storage power supply mode is as follows: the first end of the conversion module (20) is connected to the energy storage connection end, and the third end of the conversion module (20) is connected to the terminal connection end; or, the mobile power supply mode is as follows: the fifth end of the conversion module (20) is connected to the mobile connection end (10), and the third end of the conversion module (20) is connected to the terminal connection end.

11. A power supply system, characterized in that, It includes an energy storage module (31) and a power supply device (100) as described in any one of claims 1-11, wherein the power supply device (100) is connected to the energy storage module (31).

12. The power supply system as described in claim 12, characterized in that, The energy storage module (31) includes an energy storage unit (33), which is connected to the conversion module (20); And / or, the power supply system further includes a terminal module (32), the input end of which is connected to a terminal connection end.

13. The power supply system as described in claim 13, characterized in that, The energy storage module (31) also includes a safety unit (9), which is located between the energy storage module (33) and the conversion module (20).

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