Integrated charging and power supply system, mobile charging and power supply device and control method

Abstract

The application relates to the technical field of power supply, and discloses an integrated energy storage and charging power supply system, a mobile energy storage and charging power supply device and a control method, which comprises a direct-current bus, an energy storage module, an energy conversion module, a direct-current input interface module and a management module; the energy storage module comprises an energy storage battery cluster and a battery management unit; the energy conversion module comprises an AC-DC conversion unit, an energy storage converter and a DC-DC conversion unit; an input end of the direct-current input interface module is used for connecting an external direct-current power supply; the management module is in communication connection with the battery management unit, the AC-DC conversion unit, the energy storage converter, the DC-DC conversion unit and the direct-current input interface module respectively, and the management module is configured to coordinate energy flow between the energy storage module, the energy conversion module and an external energy source, and to regulate and control the conversion of electric energy between the system, the external energy source and an external load. The application has integrated management and control functions such as energy storage, charging and energy scheduling, and can be adapted to various energy access and load power supply requirements.

Description

Technical Field

[0001] This application relates to the field of energy storage technology, and in particular to an integrated energy storage, charging and power supply system, a mobile energy storage, charging and power supply device and a control method. Background Technology

[0002] With the rapid development of the new energy vehicle industry and the continuous growth in the number of electric vehicles, the demand for diversified charging and power supply infrastructure is becoming increasingly urgent. Currently, the market exhibits a "separate" development pattern for charging equipment and energy storage equipment, which is insufficient to meet the development needs for cleaner, more efficient, and more flexible energy.

[0003] Traditional fixed charging stations are highly dependent on municipal power grids. Charging capacity drops significantly or even ceases during peak grid load periods or outages. Furthermore, they require extensive civil engineering work, including pipe laying, wiring, and foundation construction, with construction periods lasting several months. This makes them unsuitable for quickly responding to temporary charging needs during large exhibitions or outdoor construction sites. In rural areas and field work sites with weak grid coverage, fixed charging stations are scarce due to high construction costs and low user density, exacerbating the "charging difficulty" problem for electric vehicles. Simultaneously, existing fixed charging stations lack deep integration with energy storage devices, making it impossible to recover vehicle-to-grid (V2G) braking energy or utilize distributed clean energy sources such as solar and wind power, resulting in low energy efficiency.

[0004] On the other hand, existing energy storage devices (such as energy storage containers and portable energy storage power supplies) mostly serve as standalone energy storage or emergency power supply functions, requiring additional charging converters to charge electric vehicles. These devices have low integration, large footprint, and cumbersome operation. Furthermore, these energy storage devices lack a unified energy management and dispatch mechanism, making it impossible to achieve dynamic adjustment of "storing electricity during off-peak hours and discharging during peak hours." They are also difficult to adapt flexibly to various external energy sources (such as grid power, diesel generators, and photovoltaics), failing to meet the needs of the coordinated development of new energy vehicles and clean energy.

[0005] Regarding the aforementioned technologies, existing charging and energy storage modes are fragmented, highly dependent on the power grid, lack deployment flexibility, have low energy utilization efficiency, and lack integrated energy dispatch and multi-scenario adaptability. They cannot meet the energy development trend of green energy use and low-carbon emission reduction. There is an urgent need for an integrated, mobile, and multi-energy adaptable energy storage and charging power supply solution. Summary of the Invention

[0006] To address the aforementioned technical problems, this application provides an integrated energy storage and charging power supply system, a mobile energy storage and charging power supply device, and a control method.

[0007] Firstly, the integrated energy storage and charging power supply system provided in this application adopts the following technical solution: An integrated energy storage and charging power supply system includes a DC bus, an energy storage module, an energy conversion module, a DC input interface module, and a management module. The energy storage module includes an energy storage battery cluster and a battery management unit, with the battery cluster connected to the DC bus. The energy conversion module, also connected to the DC bus, includes an AC-DC converter, an energy storage inverter, and a DC-DC converter. The input of the AC-DC converter is connected to an external AC power source, and its output is connected to the DC bus. The input of the energy storage inverter is connected to the DC bus, and its output is connected to an AC load. The first end of the DC-DC converter is connected to the DC bus, and its second end is connected to a DC load. The input of the DC input interface module is connected to an external DC power source, and its output is connected to the DC bus. The management module is communicatively connected to the battery management unit, the AC-DC converter, the energy storage inverter, the DC-DC converter, and the DC input interface module. The management module is configured to coordinate the energy flow between the energy storage module, the energy conversion module, and external energy sources on the DC bus, and to regulate the power conversion between the system and external energy sources, and between the system and external loads.

[0008] By adopting the above technical solutions, a DC bus is used as the common energy convergence channel of the system to build an energy convergence platform. This platform integrates energy storage, multi-type energy conversion, and external energy access functions, realizing integrated management and control of "energy storage-charging-energy dispatch". This breaks the traditional model of separating energy storage and charging, reduces dependence on the municipal power grid, improves energy utilization efficiency, and adapts to various energy access and load power supply needs, thereby enhancing the system's versatility.

[0009] Optionally, the integrated energy storage and charging power supply system also includes an auxiliary power module. The auxiliary power module is located between the DC bus and the management module, forming a self-starting loop with the management module. The energy storage module outputs DC power to the DC bus in response to the physical start signal. The auxiliary power module draws power from the DC bus and converts it into control power to wake up the management module and perform a system cold start.

[0010] By adopting the above technical solution, the system can be started cold without relying on an external auxiliary power source, thanks to the energy storage module. This improves the system's emergency start capability in scenarios without an external power source, simplifies the operation process, and enhances the applicability of the equipment in emergency scenarios.

[0011] Optionally, the integrated energy storage and power supply system also includes an AC input interface module, which includes an AC generator access interface, an external AC power supply access interface, and a green electricity access interface.

[0012] By adopting the above technical solutions, flexible access to various AC energy sources such as grid power, diesel generators, and photovoltaics can be supported, broadening the system's power replenishment channels. This not only adapts to traditional energy replenishment scenarios but also makes full use of distributed clean energy, meeting the needs of green energy use and low-carbon emission reduction in clean energy development.

[0013] Optionally, the integrated energy storage and charging power supply system also includes a liquid cooling heat dissipation module and a fire protection module. The liquid cooling heat dissipation module is electrically connected to the AC output terminal of the energy storage converter, and the fire protection module is communicatively connected to the battery management unit. When the battery management unit detects a thermal runaway signal in the energy storage module, it sends a start command to the fire protection module, and the fire protection module initiates the fire extinguishing procedure.

[0014] By adopting the above technical solutions, the liquid cooling heat dissipation module can ensure the heat dissipation stability of the system during high-power operation and improve the problem of equipment performance being affected by overheating; the linkage design of the fire protection module and the battery management unit can quickly respond to the risk of thermal runaway of the energy storage module, promptly initiate the fire extinguishing procedure, and improve the system's safety protection level.

[0015] Optionally, the DC-DC converter unit is a bidirectional DC-DC converter, and the management module is also configured to: when the DC load has reverse discharge capability, control the DC-DC converter unit to work in reverse, recover the electrical energy of the DC load to the DC bus and store it in the energy storage module.

[0016] By adopting the above technical solution, bidirectional flow of electrical energy can be achieved, and the braking energy (V2G) of DC loads such as electric vehicles can be recovered, thereby improving the energy recovery and utilization rate, reducing energy waste, and further optimizing the system's energy-saving effect.

[0017] Secondly, the integrated mobile energy storage and charging power supply device provided in this application adopts the following technical solution: An integrated mobile energy storage and charging power supply device includes a movable cabinet and an integrated energy storage and charging power supply system as described in any of the first aspects, integrated within the cabinet.

[0018] By adopting the above technical solutions, the integrated energy storage and power supply system is integrated into a mobile cabinet, eliminating the need for civil construction. It can be quickly deployed to temporary or grid-weak scenarios such as large exhibitions, outdoor construction, remote rural areas, and emergency rescues via trailers, improving the flexibility of equipment deployment, quickly responding to various temporary charging and power supply needs, and making up for the shortcomings of insufficient coverage of fixed charging piles.

[0019] Thirdly, the control method for an integrated energy storage and charging power supply system provided in this application adopts the following technical solution: A control method for an integrated energy storage and charging power supply system includes the following steps: S1. Self-test startup steps: In response to the startup operation, the energy storage module outputs DC power to the DC bus, the auxiliary power module draws power from the DC bus and converts it into control power, wakes up the management module, and the management module establishes the internal AC power supply network after completing the self-test. S2. Pattern recognition steps: The management module detects the connection status and electrical parameters of each interface and identifies the current working condition as off-grid power supply mode, grid-connected supplementary power supply mode, or grid-connected coordinated charging mode. S3. Energy Dispatch Steps: Based on the identified operating mode, the management module controls the power throughput direction and magnitude of the energy conversion module and energy storage module on the DC bus via the communication bus. The energy conversion module includes an AC-DC converter, an energy storage converter, and a DC-DC converter. S4. Emergency Fault Procedures: The management module monitors the operating parameters of each module. When a fault is detected, it sends control commands through the communication bus to perform fault isolation operations, emergency power supply switching operations, alarm triggering, or shutdown operations.

[0020] By adopting the above technical solutions, an intelligent control logic for the entire process of "start-up-identification-scheduling-emergency" is constructed to realize energy distribution under different operating conditions, ensure stable operation of the system in various scenarios such as off-grid and grid-connected, and at the same time have the ability to respond quickly to faults, thereby improving the reliability and safety of system operation.

[0021] Optionally, when the off-grid power supply mode is identified, step S3 includes: S31a, Control the ACDC converter unit to stop working; S32a: Control the energy storage module to output electrical energy to the DC bus; S33a: Control the energy storage converter to invert the DC power on the DC bus to AC power to supply AC load; at the same time, control the DC-DC converter unit to output DC power according to the needs of the connected DC load to supply DC load.

[0022] By adopting the above technical solution, in off-grid scenarios, the power supply requirements of AC and DC loads can be met simultaneously by relying solely on the internal energy storage module, ensuring continuous power supply capability in scenarios without external power sources. This is suitable for off-grid scenarios such as emergency rescue and field operations.

[0023] Optionally, when the grid-connected power supply mode is identified, step S3 includes: S31b: The management module determines whether the remaining power (SOC) of the energy storage module is lower than the first preset threshold. S32b If so, the management module executes at least one of the following charging control strategies based on the access status of external energy: When it detects that the power of the external AC power supply connected to the input terminal of the AC-DC converter is greater than the current total load power of the system, it controls the operation of the AC-DC converter to convert the surplus power of the external AC power supply into DC power, which is then used to charge the energy storage module via the DC bus; When it detects that the external AC power supply connected to the input terminal of the energy storage converter, it controls the operation of the energy storage converter to convert the input AC power into DC power and transmit it to the DC bus to charge the energy storage module. S33b: Once the remaining power of the energy storage module reaches the second preset threshold, the control system enters the float charging or standby state.

[0024] By adopting the above technical solution, the charging process is intelligently triggered based on the remaining power of the energy storage module, giving priority to using the surplus power of external energy for charging, preventing energy waste, and realizing automated control of the charging process, ensuring the charging and discharging safety of the energy storage module and extending its service life.

[0025] Optionally, when identified as a grid-connected coordinated charging mode, step S3 includes: S31c: Obtain the maximum allowable input power of the external AC power supply; S32c: Real-time calculation of the total load power demand of the current system; S33c When the total load power demand exceeds the maximum allowable input power, the management module controls the energy storage module to discharge electricity to the DC bus, so that the energy released by the energy storage module is superimposed on the DC bus with the energy output of at least one of the ACDC converter unit or energy storage converter to make up for the power gap.

[0026] By adopting the above technical solutions, the limitations of relying solely on mains power supply are overcome, enabling multi-source coordinated power supply from mains power, diesel generators, photovoltaic energy, external DC power sources, and energy storage modules. This is particularly suitable for photovoltaic energy access needs in outdoor scenarios where there is no mains power or the mains power is weak. It can not only make up for the insufficient power supply of various external energy sources, but also make full use of clean energy, prevent power outages caused by overload, ensure the stable and continuous operation of the system under high load demand scenarios, reduce dependence on the peak power supply capacity of the grid, and meet the requirements of flexible energy development for green energy use and low-carbon emission reduction.

[0027] In summary, this application includes at least one of the following beneficial technical effects: 1. It realizes the integration of energy storage, charging and energy dispatch, breaks the traditional "energy storage-charging separation" model, integrates multiple modules to work together based on DC bus, reduces dependence on municipal power grid, and is compatible with various energy access methods such as grid power, diesel generator, photovoltaic, and external DC charging piles, improves energy utilization efficiency and adaptability to all scenarios, and meets the needs of clean and efficient energy development for green energy use and low carbon emission reduction; 2. It has high flexibility and rapid deployment capability. Through the integrated design of mobile cabinet, it can be quickly transported to temporary or weak power grid scenarios such as large exhibitions, outdoor construction, remote rural areas, and emergency rescue without the need for civil construction. It can quickly respond to various temporary charging and power supply needs and make up for the shortcomings of insufficient coverage of fixed charging piles. 3. It has a high degree of intelligence and safety and reliability. It realizes energy scheduling under multiple working conditions such as off-grid and grid-connected through multi-module linkage control. It supports V2G power recovery, multi-source collaborative power supply and other functions. It is also equipped with liquid cooling heat dissipation, fire protection and fault emergency handling mechanism to ensure stable operation and safety protection of the system, while taking into account the ease of operation and long-term stability. Attached Figure Description

[0028] Figure 1 This is a schematic block diagram of the integrated energy storage, charging, and power supply system provided in the embodiments of this application; Figure 2 This is a structural diagram of the integrated energy storage and charging power supply system provided in the embodiments of this application; Figure 3 This is a schematic diagram of the overall structure of the integrated mobile energy storage and charging power supply device provided in the embodiments of this application; Figure 4 This is a schematic diagram of the internal structure of the integrated mobile energy storage and charging power supply device provided in the embodiments of this application; Figure 5 This is a flowchart of the control method for the integrated energy storage and charging power supply system provided in the embodiments of this application.

[0029] Explanation of reference numerals in the attached figures: 10. DC busbar; 11. Energy storage module; 111. Energy storage battery cluster; 112. Battery management unit; 12. Energy conversion module; 121. AC-DC converter; 122. Energy storage inverter; 123. DC-DC converter; 13. DC input interface module; 14. Management module; 15. Auxiliary power supply module; 16. AC input interface module; 161. AC generator access interface; 162. External AC power access interface; 163. Green electricity access interface; 17. AC busbar; 18. Liquid cooling heat dissipation module; 19. Fire protection module; 20. Cabinet; 21. Start switch; 22. Emergency stop switch; 23. Display screen; 24. Indicator light; 25. Charging gun; 26. AC output interface module. Detailed Implementation

[0030] The following is in conjunction with the appendix Figure 1 -Appendix Figure 5 This application will be described in further detail.

[0031] Reference Figure 1This application discloses an integrated energy storage and charging power supply system, including a DC bus 10, an energy storage module 11, an energy conversion module 12, a DC input interface module 13, and a management module 14. The DC bus 10 serves as the system's common energy collection channel. The energy storage module 11 includes an energy storage battery cluster 111 and a battery management unit (BMS), with the energy storage battery cluster 111 connected to the DC bus 10. The energy conversion module 12 is connected to the DC bus 10 and includes an AC-DC converter unit 121, an energy storage inverter 122, and a DC-DC converter unit 123. The input terminal of the AC-DC converter unit 121 is used to connect to an external AC power supply, and the output terminal can be connected to the DC bus 10 via a protection circuit or a voltage matching circuit (not shown in the figure). The input terminal of the energy storage converter 122 (PCS) is connected to the DC bus 10, and the output terminal is used to connect to the AC load; the first terminal of the DC-DC converter unit 123 is connected to the DC bus 10, and the second terminal is used to connect to the DC load; the input terminal of the DC input interface module 13 is used to connect to the external DC power supply, and the output terminal is connected to the DC bus 10; the management module 14 is communicatively connected to the battery management unit 112, the AC-DC converter unit 121, the energy storage converter 122, the DC-DC converter unit 123, and the DC input interface module 13, respectively. The management module 14 is configured to: coordinate the energy flow between the energy storage module 11, the energy conversion module 12, and the external energy on the DC bus 10, and regulate the power conversion between the system and the external energy and between the system and the external load.

[0032] Specifically, this application has functions such as multi-energy access, AC / DC power supply, energy storage scheduling, and emergency support. It can realize multi-scenario adaptation for grid-connected power supplementation, grid-connected coordinated charging, off-grid power supply, and vehicle-to-grid (V2G) braking energy recovery, flexibly meeting the energy supply and scheduling needs of different scenarios. For example, in scenarios such as highway service areas and urban fast charging stations, the system can connect to mains power, diesel generators, or photovoltaic inverters, prioritizing power supply to DC loads such as electric vehicles and AC loads such as nearby shops, with surplus energy stored in energy storage module 11. In remote rural areas and field work sites with weak grid coverage, when the external grid fails or loses power, the system switches to off-grid mode, providing continuous power to production equipment and public facilities through energy storage module 11 and energy conversion module 12, ensuring power continuity. In grid-connected scenarios such as charging stations in industrial and commercial parks and residential communities, the system can execute grid-connected coordinated charging strategies. When the load power exceeds the grid's allowable limit (e.g., during peak electricity consumption periods or extreme weather), it automatically calls upon energy storage module 11 to release energy to supplement grid power; when the load power is below the grid's allowable limit, it utilizes the grid's power supply... The surplus capacity replenishes the energy storage module 11, enabling peak shaving and valley filling of the power grid load, ensuring power supply stability and grid friendliness. Furthermore, in scenarios such as bus depots and ride-hailing charging stations, surplus energy from electric vehicles can be recovered via V2G technology, stored in the energy storage module 11, and then distributed to other loads or fed back to the grid as needed, improving energy recycling efficiency. In addition, using an independently configured DC input interface module 13, which connects to a voltage-matched external DC source, the system can directly connect to external DC power sources such as portable DC power supplies or small DC generators, eliminating the need for secondary AC-DC conversion via the AC-DC converter unit 121. This reduces energy loss in intermediate stages, improves energy utilization efficiency, and further broadens the system's energy replenishment channels under AC power-free conditions, enhancing the system's adaptability and compatibility in complex environments.

[0033] Understandably, this application uses DC bus 10 as the common energy convergence channel of the system to build an energy convergence platform, integrate energy storage, multi-type energy conversion and external energy access functions, realize integrated management and control of "energy storage-charging-energy dispatch", break the traditional model of separating energy storage and charging, reduce dependence on municipal power grid, improve energy utilization efficiency, and adapt to various energy access and load power supply needs, thereby enhancing the system's versatility.

[0034] Reference Figure 1In one embodiment, the integrated energy storage and charging power supply system further includes an auxiliary power module 15. The auxiliary power module 15 is disposed between the DC bus 10 and the management module 14, forming a self-starting loop with the management module 14. The energy storage module 11 outputs DC power to the DC bus 10 in response to the physical start signal. The auxiliary power module 15 draws power from the DC bus 10 and converts it into control power to wake up the management module 14 and perform a system cold start.

[0035] Specifically, the physical start signal can be triggered by the physical start switch 21. The user activates the self-starting circuit by operating this component. After receiving the signal, the energy storage module 11 outputs DC power (such as 12V or 24V) to the DC bus 10 through the built-in battery management unit 112 (BMS). The auxiliary power module 15, as a dedicated power conversion unit, converts the DC power on the DC bus 10 into a low-voltage control power supply (such as 5V or 3.3V) that is compatible with the management module 14 (EMS), to power the core chip, communication interface and other key components of the management module 14, and completes the wake-up initialization of the management module 14. After the management module 14 starts, it completes the communication handshake and self-test with the ACDC converter unit 121, energy storage converter 122, DCCDC converter unit 123 and DC input interface through a preset communication protocol (such as Modbus TCP). After confirming that there are no faults, it issues the system operation command to realize the cold start from the start-up trigger to the system readiness.

[0036] It is understood that this application does not rely on an external auxiliary power source and can complete the system cold start with the help of the internal energy storage module 11. Compared with traditional technologies, this application improves the emergency start capability of the system in the absence of an external power source, simplifies the operation process, and enhances the applicability of the equipment in emergency scenarios.

[0037] Reference Figure 2 In one embodiment, the integrated energy storage and charging power supply system further includes an AC input interface module 16, which includes an AC generator access interface 161, an external AC power supply access interface 162, and a green electricity access interface 163.

[0038] Specifically, the AC generator access interface 161 and the external AC power access interface 162 of the AC input interface module 16 can adopt a time-sharing mode (the same physical interface is used to access the mains power or diesel generator at different times), or they can be set as two independent interfaces. Both are connected to the input terminal of the AC-DC converter unit 121 through a quick connector to realize the quick access of traditional AC power. The green energy access interface 163 is used to access renewable green energy such as photovoltaic, wind power, hydropower, and biomass energy. After being converted into suitable AC power by the corresponding inverter, it is output through the circuit breaker switch (all QF series switches in the figure are circuit breakers) and then connected to the green energy access interface 163 of this system. This interface is further connected to the input terminal of the energy storage converter 122 to complete the access of distributed clean energy and subsequent energy conversion.

[0039] Understandably, the energy storage and charging power supply system of this application supports flexible access to various AC energy sources such as grid power, diesel generators, and photovoltaics, which broadens the system's power replenishment channels. It can not only adapt to traditional energy replenishment scenarios, but also make full use of distributed clean energy, meeting the needs of green energy use and low-carbon emission reduction in clean energy development.

[0040] Reference Figure 2 In one embodiment, the integrated energy storage and power supply system also includes internal AC loads such as a liquid-cooled heat dissipation module 18 (e.g., a liquid chiller), an axial flow fan, a dehumidifier, a fire protection module 19, a high-voltage box control switch (circuit breaker QF22), a switching power supply switch (circuit breaker QF24), and a control circuit power supply switch (circuit breaker QF25). The liquid-cooled heat dissipation module 18 dissipates heat from components such as the energy storage battery cluster and the energy conversion module 12. The axial flow fan works in conjunction with it to form a composite heat dissipation system, which can ensure the heat dissipation stability of the system during high-power operation and improve the problem of equipment performance being affected by overheating. The dehumidifier maintains a dry internal environment and prevents electrical... An insulation failure occurs in a component; the fire protection module 19 is connected to the battery management unit 112 (not shown in the figure). When the battery management unit 112 detects a thermal runaway signal in the energy storage module 11, it sends a start command to the fire protection module 19. The fire protection module 19 then initiates the fire extinguishing procedure, improving the system's safety protection level; the high-voltage box ensures the safe transmission of high-voltage power to the battery cluster; the switching power supply provides the control power support for the system's cold start and continuous operation; the control circuit power supply provides power to the switch circuit breaker, module start / stop, and other control logic circuits. These internal loads are electrically connected to the AC output terminal of the energy storage converter 122 through the AC bus 17.

[0041] Reference Figure 2 In one embodiment, the DC-DC converter 123 is a bidirectional DC-DC converter, and the management module 14 is further configured to: when the DC load has reverse discharge capability, control the DC-DC converter 123 to work in reverse, recover the electrical energy of the DC load to the DC bus 10 and store it in the energy storage module 11.

[0042] Specifically, when the system is connected to the electric vehicle (DC load) via the charging gun 25, the management module 14 first detects the connection status of the charging gun 25 and the parameters of the vehicle battery. If it is a charging scenario, the management module 14 sends a positive working command to the bidirectional DC-DC converter. The converter converts the electrical energy of the DC bus 10 into a voltage suitable for the vehicle battery to charge the electric vehicle. If the electric vehicle has reverse discharge capability and the system has energy recovery requirements, the management module 14 sends a reverse working command. The converter switches the energy flow direction and converts the DC power output by the electric vehicle into a voltage level suitable for the DC bus 10. The electrical energy is transmitted through the DC bus 10 and stored in the energy storage module 11. The battery management unit 112 synchronously monitors the status of the energy storage module 11 to ensure charging and discharging safety.

[0043] Understandably, achieving bidirectional flow of electrical energy can recover braking energy (V2G) from DC loads such as electric vehicles, improve energy recovery and utilization rates, reduce energy waste, and further optimize the system's energy-saving effect.

[0044] Reference Figure 3 and Figure 4 This application also discloses an integrated mobile energy storage and charging power supply device, including a movable cabinet 20 and an integrated energy storage and charging power supply system as described in any of the above embodiments, integrated within the cabinet 20.

[0045] Specifically, such as Figure 3 As shown, a display screen 23, indicator lights 24 (such as system power-on indicator light 24, charging gun 25 operation indicator light 24, system fault indicator or warning indicator), a start switch 21 (start button), and an emergency stop switch 22 are provided on one side surface (front) of the cabinet 20. It is also equipped with a charging gun 25 and a power input interface module. The power input interface module includes a DC input interface module 13 and an AC input interface module 16. In this embodiment, the DC input interface module 13 is preferably a CCS2 input socket (Combined Charging System 2) integrated with the AC input interface module 16 in the same area, such as... Figure 4As shown, on the other side (reverse direction) of the cabinet 20, there is an AC output interface module 26 housed inside a fast-lock box, which connects to the AC busbar 17 inside the system. The cabinet 20 also integrates an energy conversion module 12, including an AC-DC converter unit 121, an energy storage converter 122, a DC-DC converter unit 123, an energy storage module 11, a liquid cooling module 18, and a fire protection module 19. Each functional module is located in a different space and is connected to the DC busbar 10 and AC busbar 17 via internal wiring, forming a complete integrated energy storage, charging, and power supply system. In another embodiment, wheels can be provided at the bottom of the cabinet 20 to further improve the device's mobility and adapt to the rapid relocation needs of more temporary scenarios.

[0046] Understandably, this application integrates the integrated energy storage and power supply system into the mobile cabinet 20. Compared with traditional fixed charging piles, it does not require civil construction and can be quickly deployed to temporary or weak grid scenarios such as large exhibitions, outdoor construction, remote rural areas, and emergency rescue by means of trailers, thereby improving the flexibility of equipment deployment, quickly responding to various temporary charging and power supply needs, and making up for the shortcomings of insufficient coverage of fixed charging piles.

[0047] This application also discloses a control method for an integrated energy storage and charging power supply system, including the following steps: S1. Self-test start-up steps: In response to the start-up operation, the energy storage module 11 outputs DC power to the DC bus 10, the auxiliary power module 15 draws power from the DC bus 10 and converts it into control power, wakes up the management module 14, and the management module 14 establishes the internal AC power supply network after completing the self-test. S2, Pattern Recognition Steps: The management module 14 detects the connection status and electrical parameters of each interface and identifies the current working condition as off-grid power supply mode, grid-connected supplementary power supply mode, or grid-connected coordinated charging mode. S3. Energy scheduling steps: According to the identified operating mode, the management module 14 controls the power throughput direction and magnitude of the energy conversion module 12 and the energy storage module 11 on the DC bus 10 through the communication bus. The energy conversion module 12 includes an AC-DC converter 121, an energy storage converter 122 and a DC-DC converter 123. S4. Emergency Fault Procedures: The management module 14 monitors the operating parameters of each module. When a fault is detected, it sends control commands through the communication bus to perform fault isolation operations, emergency power supply switching operations, alarm triggering, or shutdown operations.

[0048] Specifically, in step S1, the startup operation can be triggered by the physical start switch 21. The DC power output by the energy storage module 11 first powers the auxiliary power module 15. After the management module 14 is woken up and completes the status self-check of each core component (such as the energy storage module 11 and the energy conversion module 12), it synchronously builds the internal AC power supply circuit to power the internal loads such as heat dissipation and control. In step S2, the interfaces detected by the management module 14 include multiple types of energy input interfaces and multiple types of AC and DC load output interfaces. By the on / off status of the interfaces and parameters such as voltage and current, it distinguishes between off-grid scenarios without external energy and grid-connected supplementary power scenarios with external energy that need to be supplemented. In the scenario of grid-connected charging that still requires coordination with the grid load, in step S3, the regulation of power throughput direction controls the flow direction of energy between external energy, energy storage module 11, and load. For example, when the grid is connected for power replenishment, external energy stores electricity in energy storage module 11, and when the grid is disconnected, energy storage module 11 supplies power to the load. The power is dynamically adjusted according to the load demand or energy capacity to ensure supply and demand matching. In step S4, the parameters monitored by management module 14 include component temperature, voltage abnormality, etc. When a fault occurs, the circuit of the faulty component will be cut off, and the emergency power supply mode will be selected as needed. At the same time, an alarm will be issued through indicator light 24 or display screen 23, and the system will be shut down if necessary to reduce the risk.

[0049] It is understood that the embodiments of this application construct an intelligent control logic for the entire process of "start-up-identification-scheduling-emergency" to realize energy distribution under different operating conditions, ensure stable operation of the system in various scenarios such as off-grid and grid-connected, and at the same time have the ability to respond quickly to faults, thereby improving the reliability and safety of system operation.

[0050] In one embodiment, when the off-grid power supply mode is identified, step S3 includes: S31a, Control the AC-CDC converter unit 121 to stop working; S32a: Control the energy storage module 11 to output electrical energy to the DC bus 10; S33a: Control the energy storage converter 122 to invert the DC power on the DC bus 10 into AC power to supply AC load; at the same time, control the DC-DC converter unit 123 to output DC power according to the needs of the connected DC load to supply DC load.

[0051] Specifically, for example, in a field operation scenario, when the system identifies the off-grid power supply mode, it first controls the AC-DC converter 121 to stop working to disconnect from the external AC power supply. Then, it controls the energy storage module 11 to output electrical energy to the DC bus 10. Subsequently, it controls the energy storage converter 122 to invert the DC power on the DC bus 10 into AC power to power the AC tools used for operation (such as AC welding machines). At the same time, it controls the DC-DC converter 123 to output adapted DC power according to the needs of the connected DC load (such as electric engineering vehicles) to charge the DC load.

[0052] Understandably, in off-grid scenarios, the internal energy storage module 11 alone can simultaneously meet the power supply needs of AC and DC loads, ensuring continuous power supply capability in scenarios without external power sources, and is suitable for off-grid scenarios such as emergency rescue and field operations.

[0053] In one embodiment, when the grid-connected power supply mode is identified, step S3 includes: S31b, the management module 14 determines whether the remaining power (SOC) of the energy storage module 11 is lower than the first preset threshold; S32b If so, the management module 14 executes at least one of the following charging control strategies based on the access status of external energy: when it detects that the power of the external AC power supply connected to the input terminal of the AC-DC converter 121 is greater than the current total load power of the system, it controls the operation of the AC-DC converter 121 to convert the surplus power of the external AC power supply into DC power, which is then used to charge the energy storage module 11 via the DC bus 10; when it detects that the external AC power supply connected to the input terminal of the energy storage converter 122, it controls the operation of the energy storage converter 122 to convert the input AC power into DC power and transmit it to the DC bus 10 to charge the energy storage module 11. S33b, until the remaining power of the energy storage module 11 reaches the second preset threshold, the control system enters the float charging or standby state.

[0054] Specifically, for example, in the scenario of a city fast charging station, after the system identifies the grid-connected power supply mode, the management module 14 first detects the remaining power of the energy storage module 11. If the remaining power is detected to be lower than the first preset threshold (such as 30%), the system further detects the external energy access status. If the AC-DC converter 121 is connected to the mains power, and the current mains power supply is greater than the total load power of the electric vehicle charging in the station, the power consumption of surrounding shops, and the integrated mobile energy storage and charging power supply device of this application, the management module 14 will control the AC-DC converter 121 to start operation, convert the surplus power of the mains power into suitable DC power, and transmit it to the energy storage module 11 for charging through the DC bus 10. If the energy storage converter 122 is connected to an external AC power source other than mains power, such as a photovoltaic module, at the same time or separately, the energy storage converter 122 will also be controlled to operate, convert the AC power generated by the photovoltaic module into DC power and transmit it to the DC bus 10, which, together with the surplus power of the mains power alone or separately, will charge the energy storage module 11 until the remaining power of the energy storage module 11 reaches the second preset threshold of 95%. Then the management module 14 will control the relevant converter to adjust the operating state, so that the system enters the float charging or standby state to prevent overcharging.

[0055] Understandably, this mode can flexibly adapt to different external energy sources such as mains power and photovoltaics according to different application environments, and prioritize the use of the surplus power of various external energy sources to charge the energy storage module 11. This can not only fully activate distributed energy resources and prevent energy waste, but also realize the automated and intelligent control of the charging process; at the same time, it can ensure the charging and discharging safety of the energy storage module 11, extend its service life, and improve the practicality and adaptability of the system in diverse energy scenarios.

[0056] In one embodiment, when the grid-connected coordinated charging mode is identified, step S3 includes: S31c: Obtain the maximum allowable input power of the external AC power supply; S32c: Real-time calculation of the total load power demand of the current system; S33c When the total load power demand exceeds the maximum allowable input power, the management module 14 controls the energy storage module 11 to discharge to the DC bus 10, so that the energy released by the energy storage module 11 is superimposed on the DC bus 10 with the energy output of at least one of the AC-DC converter unit 121 or the energy storage converter 122 to make up for the power gap.

[0057] Specifically, in scenarios where grid access capacity is limited, such as highway service areas or industrial and commercial parks, the system sets the maximum allowable input power of external AC power to 100kW. When the management module 14 monitors and calculates in real time that the total power demand of the currently connected electric vehicles and surrounding AC loads suddenly increases to 150kW, it determines that the total load power demand exceeds the upper limit allowed by the grid. At this time, the management module 14 controls the energy storage module 11 to start the discharge program, outputting 50kW of electrical energy to the DC bus 10. This electrical energy can be superimposed on the DC bus 10 with at least one of the following: the electrical energy introduced from the mains by the AC-DC converter unit 121 and the electrical energy introduced from the renewable energy grid (photovoltaic, wind, hydro, bioenergy) by the energy storage converter 122. Together, they meet the total load demand of 150kW (including AC and DC loads), thereby achieving continuous and stable operation of high-power equipment without exceeding the grid access capacity limit.

[0058] Understandably, this application overcomes the limitations of relying solely on mains power supply, enabling multi-source coordinated power supply from external energy sources such as mains power, diesel generators, and photovoltaic energy, along with the energy storage module 11. It is particularly suitable for new energy access needs in outdoor scenarios where there is no mains power or the mains power is weak. It can not only improve the problem of insufficient power supply from various external energy sources, but also utilize clean energy, prevent power outages caused by overload, ensure the stable and continuous operation of the system under high load demand scenarios, reduce dependence on the peak power supply capacity of the grid, and meet the requirements of flexible energy development for green energy use and low-carbon emission reduction.

[0059] In one embodiment, a V2G energy recovery step is also included, specifically: when the external DC load is detected to be an electric vehicle and has reverse discharge conditions, and the remaining charge (SOC) of the energy storage module 11 is lower than a third preset threshold (e.g., 50%), the management module 14 controls the DC-DC converter unit 123 to operate in reverse, converting the battery energy of the electric vehicle into DC power suitable for the voltage level of the DC bus 10, and storing it in the energy storage module 11. At the same time, the management module 14 controls the relevant converter units to adjust their operating states, so that the system enters a float charging or standby state to prevent overcharging.

[0060] Understandably, this application can recover the braking energy and idle electricity of electric vehicles to the energy storage module 11, realize the bidirectional recycling of electrical energy, prevent energy waste, improve the utilization efficiency of the entire energy system, meet the energy-saving requirements of green energy use and low carbon emission reduction, adapt to the high-frequency start-stop electric vehicle scenarios such as urban logistics vehicles and ride-hailing vehicles, and enhance the system's scenario adaptability and market competitiveness.

[0061] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. An integrated energy storage, charging, and power supply system, characterized in that, include: DC bus (10), energy storage module (11), energy conversion module (12), DC input interface module (13) and management module (14); The energy storage module (11) includes an energy storage battery cluster (111) and a battery management unit (112), and the energy storage battery cluster (111) is connected to the DC bus (10); The energy conversion module (12) is connected to the DC bus (10) and includes an AC-DC converter (121), an energy storage converter (122), and a DC-DC converter (123). The input terminal of the AC-DC converter (121) is used to connect to an external AC power supply, and the output terminal is connected to the DC bus (10). The input terminal of the energy storage converter (122) is connected to the DC bus (10), and the output terminal is used to connect to an AC load. The first terminal of the DC-DC converter (123) is connected to the DC bus (10), and the second terminal is used to connect to a DC load. The input terminal of the DC input interface module (13) is used to connect to an external DC power supply, and the output terminal is connected to the DC bus (10). The management module (14) is communicatively connected to the battery management unit (112), the AC-DC converter unit (121), the energy storage converter (122), the DC-DC converter unit (123), and the DC input interface module (13), respectively. The management module (14) is configured as follows: Coordinate the energy flow between the energy storage module (11), the energy conversion module (12) and the external energy on the DC bus (10), and regulate the power conversion between the system and the external energy, and between the system and the load.

2. The integrated energy storage and power supply system according to claim 1, characterized in that, It also includes an auxiliary power module (15), which is located between the DC bus (10) and the management module (14) and forms a self-starting loop with the management module (14). The energy storage module (11) outputs DC power to the DC bus (10) in response to the physical start signal. The auxiliary power module (15) draws power from the DC bus (10) and converts it into control power to wake up the management module (14) and perform a system cold start.

3. The integrated energy storage and power supply system according to claim 1, characterized in that, It also includes an AC input interface module (16), which includes an AC generator access interface (161), an external AC power supply access interface (162), and a green electricity access interface (163).

4. The integrated energy storage and charging power supply system according to claim 1, characterized in that, It also includes a liquid cooling heat dissipation module (18) and a fire protection module (19). The liquid cooling heat dissipation module (18) is electrically connected to the AC output terminal of the energy storage converter (122). The fire protection module (19) is communicatively connected to the battery management unit (112). When the battery management unit (112) detects a thermal runaway signal in the energy storage module (11), it sends a start command to the fire protection module (19), and the fire protection module (19) starts the fire extinguishing procedure.

5. The integrated energy storage and charging power supply system according to claim 1, characterized in that, The DC-DC converter unit (123) is a bidirectional DC-DC converter. The management module (14) is also configured to: when the DC load has reverse discharge capability, control the DC-DC converter unit (123) to work in reverse, recover the electrical energy of the DC load to the DC bus (10) and store it in the energy storage module (11).

6. An integrated mobile energy storage and charging power supply device, characterized in that, It includes a movable cabinet (20) and an integrated energy storage and power supply system as described in any one of claims 1 to 5, which is integrated into the cabinet (20).

7. A control method for an integrated energy storage, charging, and power supply system, characterized in that, Including the following steps: S1. Self-test start-up steps: In response to the start-up operation, the energy storage module (11) outputs DC power to the DC bus (10), the auxiliary power module (15) takes power from the DC bus (10) and converts it into control power, wakes up the management module (14), and the management module (14) establishes the internal AC power supply network of the system after completing the self-test; S2, Pattern Recognition Steps: The management module (14) detects the connection status and electrical parameters of each interface and identifies the current working condition as off-grid power supply mode, grid-connected power supplementation mode or grid-connected coordinated charging mode; S3, Energy scheduling steps: The management module (14) adjusts the power throughput direction and magnitude of the energy conversion module (12) and the energy storage module (11) on the DC bus (10) according to the identified working mode. The energy conversion module (12) includes an ACDC converter (121), an energy storage converter (122), and a DCCDC converter (123). S4. Emergency procedures: The management module (14) monitors the operating parameters of each module. When a fault is detected, it sends control commands through the communication bus to perform fault isolation operations, emergency power supply switching operations, trigger alarms, or shutdown operations.

8. The control method according to claim 7, characterized in that, When the off-grid power supply mode is identified, step S3 includes: S31a, Control the ACDC converter (121) to stop working; S32a, Control the energy storage module (11) to output electrical energy to the DC bus (10); S33a. Control the energy storage converter (122) to invert the DC power on the DC bus (10) into AC power to supply power to the AC load; At the same time, the DC-DC converter (123) is controlled to output DC power according to the needs of the connected DC load, so as to supply power to the DC load.

9. The control method according to claim 7, characterized in that, When the grid-connected power supply mode is identified, step S3 includes: S31b, The management module (14) determines whether the remaining power of the energy storage module (11) is lower than the first preset threshold; S32b If so, the management module (14) executes at least one of the following charging control strategies based on the access status of external energy: When it is detected that the power of the external AC power supply connected to the input terminal of the AC-DC converter (121) is greater than the current total load power of the system, the AC-DC converter (121) is regulated to operate, and the surplus power of the external AC power supply is converted into DC power, which is then used to charge the energy storage module (11) through the DC bus (10). When an external AC power supply is detected at the input terminal of the energy storage converter (122), the operation of the energy storage converter (122) is regulated to convert the input AC power into DC power and transmit it to the DC bus (10) to charge the energy storage module (11). S33b. After the remaining power of the energy storage module (11) reaches the second preset threshold, the control system enters the float charging or standby state.

10. The control method according to claim 7, characterized in that, When the grid-connected coordinated charging mode is identified, step S3 includes: S31c: Obtain the maximum allowable input power of the external AC power supply; S32c: Real-time calculation of the total load power demand of the current system; S33c When the total load power demand exceeds the maximum allowable input power, the management module (14) controls the energy storage module (11) to discharge to the DC bus (10), so that the energy released by the energy storage module (11) is superimposed on the DC bus (10) with the energy output of at least one of the ACDC converter (121) or the energy storage converter (122) to make up for the power gap.

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