Multifunctional modular mobile energy storage power supply and electric energy treatment method

Abstract

The invention discloses a multifunctional modular mobile energy storage power supply and an electric energy management method. According to the mobile energy storage power supply provided by the invention, a modular structural design is adopted, so that the use and maintenance convenience of the mobile energy storage power supply is greatly improved; meanwhile, by means of cooperative operation of a lithium battery module, a first hardware switch module, a bidirectional converter and a second hardware switch module of the energy storage power supply system and modules among a signal acquisition module, a charge and discharge control module and a display panel of the monitoring system, an electric energy quality management function and an emergency power generation function are provided for an external management target; and meanwhile, the mobile energy storage power supply has the performance of large capacity, high power and portability, and the provided mobile energy storage power supply can flexibly and efficiently work in the scenes of outdoor operation, emergency power utilization, intelligent micro-grids and the like.

Description

Technical Field

[0001] The present invention relates to the technical field of mobile energy storage power supplies, and in particular to a multifunctional modular mobile energy storage power supply and an electric energy management method. Background Art

[0002] Amidst the broader energy transition, the proportion of renewable energy sources such as wind power and photovoltaics continues to increase. However, the intermittent and unstable nature of their power generation poses challenges to the stable operation of the power grid. Mobile energy storage power supplies, by storing and releasing electricity at appropriate times, can effectively promote the absorption of new energy and enhance grid stability. Furthermore, with the increasing level of social development, activities such as outdoor travel, camping, and field work are becoming increasingly frequent, increasing the demand for outdoor electricity. Simultaneously, the need for emergency power supplies in emergencies such as natural disasters and sudden incidents is becoming increasingly urgent. Mobile energy storage power supplies, with their large capacity, high power, safety, and portability, can effectively meet these needs. Coupled with the continued maturity and cost reduction of lithium-ion battery technology, as well as advances in related technologies such as power electronics and intelligent control, the development of mobile energy storage power supplies has provided strong support. Various policy support measures have further guaranteed their technological innovation and market promotion.

[0003] However, current mobile energy storage power supplies often utilize an integrated design, with all components highly integrated onto a single motherboard. This restricts users to a few pre-defined modes, especially when a component malfunctions. This high degree of integration necessitates a complete system repair or scrapping, limiting the flexibility of the power storage system in terms of use and maintenance. Furthermore, existing mobile energy storage power supplies lack significant functionality to address the instability associated with the integration of renewable energy sources like photovoltaic and wind power into the grid, as well as voltage instability in remote areas. This lack of power quality management is particularly crucial, preventing them from providing effective positive feedback on the grid's power quality when connected. Summary of the Invention

[0004] The present invention provides a multifunctional modular mobile energy storage power supply and power management method, which are used to solve the technical problems that existing mobile energy storage power supplies have poor maintenance flexibility due to their highly integrated design, and are unable to effectively participate in work scenarios such as power quality management of the power grid due to the lack of power quality management functions.

[0005] The present invention provides a multifunctional modular mobile energy storage power supply, comprising: an energy storage power supply system and a monitoring system; the energy storage power supply system is electrically connected to the monitoring system;

[0006] The energy storage power supply system includes a lithium battery module, a first hardware switch module, a bidirectional converter, and a second hardware switch module connected in sequence via a pluggable interface; the energy storage power supply system is connected to an external control target via the second hardware switch module; the bidirectional converter is used to achieve bidirectional energy flow between the lithium battery module and the external control target;

[0007] The monitoring system includes a signal acquisition module, a charge and discharge control module and a display panel connected in sequence;

[0008] The signal acquisition module is used to collect the lithium battery voltage of the lithium battery module, the operating data of the external control target and the operating data of the bidirectional converter and upload the collected data to the charge and discharge control module;

[0009] The charge and discharge control module is configured to receive and determine the collected data from the signal acquisition module; generate a charge and discharge control signal based on preset management requirements and the collected data, and send the charge and discharge control signal to the energy storage power supply system, so that the energy storage power supply system provides charge and discharge services to the external management target; during the charge and discharge process, if the collected data triggers an abnormality protection mechanism, generate a drive abnormality signal and send the drive abnormality signal to the energy storage power supply system to control the energy storage power supply system to switch to a standby state, and upload the charge and discharge control signal, the drive abnormality signal, and the collected data to the display panel;

[0010] The display panel is used to receive the abnormal driving signal, the charge and discharge control signal and the collected data and display corresponding display data.

[0011] Optionally, the bidirectional converter includes a low-voltage stabilizing capacitor, a bidirectional DC / DC converter, a high-voltage stabilizing capacitor, a bidirectional DC / AC converter and a filter inductor connected in sequence;

[0012] The low-voltage stabilizing capacitor is connected to the first hardware switch module and is used to stabilize the DC voltage output by the lithium battery module on the low-voltage side;

[0013] The bidirectional DC / DC converter is used to perform bidirectional step-up and step-down conversion on the DC voltage;

[0014] The high-voltage stabilizing capacitor is used to stabilize the 400V bus voltage on the DC high-voltage side;

[0015] The bidirectional DC / AC converter is used to perform bidirectional conversion between DC voltage and AC voltage, thereby achieving bidirectional flow of energy;

[0016] The filter inductor is connected to the second hardware switch module and is used to filter the output voltage of the bidirectional DC / AC converter or the output voltage of the external control target.

[0017] Optionally, the first hardware switch module includes two parallel relays, which are used to control the on-off state of the low-voltage side of the bidirectional converter according to the abnormal driving signal or the charge and discharge control signal;

[0018] The second hardware switch module includes three relays, which are used to control the on / off state of the high-voltage side of the bidirectional converter according to the abnormal driving signal or the charge and discharge control signal.

[0019] Optionally, the signal acquisition module includes a voltage signal acquisition circuit, a current signal acquisition circuit and a temperature acquisition circuit;

[0020] The voltage signal acquisition circuit is used to collect the voltage of the lithium battery of the lithium battery module, the voltage of the low-voltage stabilizing capacitor, the voltage of the high-voltage stabilizing capacitor and the voltage of the external control target;

[0021] The current signal acquisition circuit is used to collect the current of the lithium battery module and the current of the external control target;

[0022] The temperature acquisition circuit is used to acquire the operating temperatures of the bidirectional DC / DC converter and the bidirectional DC / AC converter.

[0023] Optionally, the external control target is specifically the mains or the load; the charge and discharge control module includes a DC / DC control processor and a DC / AC control processor;

[0024] The DC / DC control processor is used to receive and detect whether the current and voltage of the lithium battery module, the voltage of the low-voltage stabilizing capacitor, and the operating temperature of the bidirectional DC / DC converter collected by the signal acquisition module trigger an abnormal protection mechanism, and if so, generate a drive abnormality signal; the DC / AC control processor is used to receive and detect whether the voltage of the high-voltage stabilizing capacitor, the current and voltage of the external control target, and the operating temperature of the bidirectional DC / AC converter collected by the signal acquisition module trigger an abnormal protection mechanism, and if so, generate a drive abnormality signal;

[0025] The DC / DC control processor is communicatively connected to the DC / AC control processor, and is used to generate a charging and discharging control signal of the mains according to the current and voltage of the lithium battery module and the current and voltage of the mains if the preset management demand is associated with the mains; and to generate a charging control signal of the load according to the current and voltage of the lithium battery module and the current and voltage of the load if the preset management demand is associated with the load; when a fault occurs in a control processor, a fault signal is sent to the other control processor, so that the other control processor generates a drive abnormality signal.

[0026] Optionally, the display panel is provided with control buttons, a DC / DC side operation status indicator light and a DC / AC side operation indicator light.

[0027] Optionally, the first hardware switch module specifically adopts a relay with a conduction voltage of 12V, and the second hardware switch module specifically adopts a relay with a conduction voltage of 5V.

[0028] The present invention also provides a method for managing electric energy of a multifunctional modular mobile energy storage power supply, the method relating to any of the multifunctional modular mobile energy storage power supplies described above, the method comprising:

[0029] Obtain governance requirements, initialize operating parameters according to the governance requirements and enter the corresponding governance mode;

[0030] If the management demand is related to the mains power, call the mobile energy storage power supply to connect to the mains power and enter the power quality management mode, detect the operating data of the mobile energy storage power supply and the operating data of the mains power, and implement the power quality management operation strategy for the mains power according to the detection results;

[0031] If the management demand is associated with the load, enter the emergency power generation mode, control the mobile energy storage power supply to supply power and store energy, and after the power supply and energy storage are completed, call the mobile energy storage power supply to connect to the load and power the load; during the power supply process, detect the operating data of the mobile energy storage power supply and the operating data of the load, and execute the load management operation strategy according to the detection results.

[0032] Optionally, if the management demand is associated with the mains, calling a mobile energy storage power supply to connect to the mains and enter a power quality management mode, detecting the operating data of the mobile energy storage power supply and the operating data of the mains, and performing a power quality management operation strategy on the mains according to the detection results, includes:

[0033] If the control demand is related to the mains power, call the mobile energy storage power supply to connect to the mains power and enter the power quality control mode;

[0034] If a grid-connected working mode signal is received, the amplitude and phase angle of the mains power are tracked;

[0035] Detecting whether the lithium battery voltage is normal; if the lithium battery voltage is abnormal, generating abnormal information of the lithium battery voltage and controlling the mobile energy storage power supply to enter a standby mode;

[0036] If the lithium battery voltage is normal, determining the mains voltage according to the collected amplitude and phase angle of the mains, and judging whether the mains voltage is normal;

[0037] If the mains voltage is abnormal, calling the mobile energy storage power supply to charge and discharge the mains according to the abnormal state of the mains voltage;

[0038] During the charging and discharging process, if the abnormal protection mechanism is triggered, a driving abnormality signal is generated according to the triggered abnormal protection mechanism, and the mobile energy storage power supply is controlled to enter the standby mode.

[0039] Optionally, if the management demand is associated with a load, an emergency power generation mode is entered, the mobile energy storage power supply is controlled to supply power and store energy, and after the power supply and storage are completed, the mobile energy storage power supply is called to connect to the load and supply power to the load; during the power supply process, operating data of the mobile energy storage power supply and the load are detected, and the load management operation strategy is executed according to the detection results, including the following steps:

[0040] If the control demand is associated with the load, the system enters the emergency power generation mode, controls the mobile energy storage power supply to supply power and store energy, and after the power supply and storage is completed, calls the mobile energy storage power supply to connect to the load and supply power to the load;

[0041] In the process of supplying power to the load, if an abnormality is detected in the lithium battery voltage, abnormal information of the lithium battery voltage is generated, and the mobile energy storage power supply is controlled to enter the standby mode; if the abnormal protection mechanism is triggered, a driving abnormality signal is generated according to the triggered abnormal protection mechanism, and the mobile energy storage power supply is controlled to enter the standby mode;

[0042] When the exit signal is received, the mobile energy storage power supply is stopped from supplying power to the load, and the mobile energy storage power supply is controlled to enter a standby mode.

[0043] It can be seen from the above technical solutions that the present invention has the following advantages:

[0044] The present invention provides a multifunctional modular mobile energy storage power supply and an electric energy management method, wherein the mobile energy storage power supply includes: an energy storage power supply system and a monitoring system; the energy storage power supply system is electrically connected to the monitoring system; the energy storage power supply system includes a lithium battery module, a first hardware switch module, a bidirectional converter, and a second hardware switch module connected in sequence via a pluggable interface; the energy storage power supply system is connected to an external management target via the second hardware switch module; the bidirectional converter is used to achieve bidirectional energy flow between the lithium battery module and the external management target;

[0045] The monitoring system includes a signal acquisition module, a charge and discharge control module and a display panel connected in sequence; the signal acquisition module is used to collect the lithium battery voltage of the lithium battery module, the operating data of the external management target and the operating data of the bidirectional converter and upload the collected data to the charge and discharge control module; the charge and discharge control module is used to receive and judge the collected data of the signal acquisition module; generate a charge and discharge control signal according to the preset management requirements and the collected data, and send the charge and discharge control signal to the energy storage power supply system, so that the energy storage power supply system provides charge and discharge services to the external management target; during the charge and discharge process, if the collected data triggers the abnormal protection mechanism, a drive abnormal signal is generated and the drive abnormal signal is sent to the energy storage power supply system to control the energy storage power supply system to switch to the standby state, and the charge and discharge control signal, the drive abnormal signal and the collected data are uploaded to the display panel; the display panel is used to receive the drive abnormal signal, the charge and discharge control signal and the collected data and display the corresponding display data.

[0046] In the present invention, a modular design is adopted to greatly improve the convenience of use and maintenance of mobile energy storage power supplies; at the same time, with the help of the collaborative operation of the lithium battery module, the first hardware switch module, the bidirectional converter and the second hardware switch module of the energy storage power supply system, as well as the signal acquisition module, the charge and discharge control module and the display panel of the monitoring system, power quality management functions and emergency power generation functions are provided for external management targets, thereby solving the technical problems of existing mobile energy storage power supplies that have poor maintenance flexibility due to their highly integrated design and cannot effectively participate in work scenarios such as power quality management of the power grid due to the lack of power quality management functions. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0048] Figure 1 A schematic diagram of a module of an embodiment of a multifunctional modular mobile energy storage power supply provided by this application;

[0049] Figure 2 This is a schematic diagram of the overall structural connection of an embodiment of a multifunctional modular mobile energy storage power supply provided by the present application;

[0050] Figure 3 A schematic diagram of the circuit structure of an embodiment of the energy storage power supply system provided by this application;

[0051] Figure 4 A flowchart of the steps of a method for managing electric energy of a multifunctional modular mobile energy storage power supply provided in this application;

[0052] Wherein, the accompanying drawings are marked as follows:

[0053] Lithium battery module 1, first hardware switch module 2, bidirectional DC / DC converter 3, bidirectional DC / AC converter 4, second hardware switch module 5, 220V AC bidirectional interface 6, external management target 7, signal acquisition module 8, charge and discharge control module 9, display panel 10 and interface integration module 11. DETAILED DESCRIPTION

[0054] The embodiments of the present invention provide a multifunctional modular mobile energy storage power supply and a power management method, which are used to solve the technical problems that the mobile energy storage power supply has poor maintenance flexibility due to its highly integrated design, and cannot effectively participate in work scenarios such as power quality management of the power grid due to the lack of power quality management function.

[0055] In order to make the purpose, features, and advantages of the present invention more obvious and easy to understand, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described below are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0056] In the description of the present invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the present invention. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0057] Unless otherwise specified or limited, the terms "mounted," "connected," and "connected" should be interpreted broadly. For example, they can refer to fixed, removable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediary; and internal communication between two components. Those skilled in the art will understand the specific meanings of these terms in the present invention based on the specific circumstances.

[0058] See also Figure 1 (The arrows in the figure indicate the method of signal and energy transmission) and Figure 2 , the present invention provides an embodiment of a multifunctional modular mobile energy storage power supply, comprising: an energy storage power supply system and a monitoring system; the energy storage power supply system is electrically connected to the monitoring system;

[0059] The energy storage power supply system includes a lithium battery module 1, a first hardware switch module 2, a bidirectional converter, and a second hardware switch module 5, which are connected in sequence via a pluggable interface. The energy storage power supply system is connected to an external control target 7 via the second hardware switch module 5. The bidirectional converter is used to achieve bidirectional energy flow between the lithium battery module 1 and the external control target 7.

[0060] The monitoring system includes a signal acquisition module 8, a charge and discharge control module 9 and a display panel 10 connected in sequence;

[0061] The signal acquisition module 8 is used to collect the lithium battery voltage of the lithium battery module 1, the operating data of the external control target 7 and the operating data of the bidirectional converter and upload the collected data to the charge and discharge control module 9;

[0062] The charge and discharge control module 9 is configured to receive and judge the data collected by the signal acquisition module 8; generate a charge and discharge control signal based on preset management requirements and the collected data, and send the charge and discharge control signal to the energy storage power system, so that the energy storage power system provides charge and discharge services to the external management target 7; during the charge and discharge process, if the collected data triggers the abnormality protection mechanism, a drive abnormality signal is generated and sent to the energy storage power system to control the energy storage power system to switch to a standby state, and the charge and discharge control signal, the drive abnormality signal, and the collected data are uploaded to the display panel 10;

[0063] The display panel 10 is used to receive abnormal driving signals, charge and discharge control signals, and collected data and display corresponding display data.

[0064] In the present invention, external management target 7 primarily refers to the mains or load. When external management target 7 is the mains, this mobile energy storage power supply can provide grid-connected power management for the mains; when external management target 7 is the load, this mobile energy storage power supply can provide emergency power generation for the load. The mobile energy storage power supply provided in this embodiment combines power quality management with emergency power generation capabilities and has flexible expansion capabilities.

[0065] It should be noted that the lithium battery module 1, the first hardware switch module 2, the bidirectional converter, and the second hardware switch module 5 are all equipped with plug-in interfaces. To increase the service life of the mobile energy storage power supply, different connection methods can be used between different components according to different power requirements. The various modules of the energy storage power supply system are connected through high-current, high-power quick-plug interfaces, which can achieve rapid assembly and disassembly and expansion of capacity and power. The signal acquisition module 8, the charge and discharge control module 9, and the display panel 10 in the monitoring system can be connected using low-current, low-power cables, thereby meeting power requirements while optimizing circuit layout.

[0066] In this embodiment, the mobile energy storage power supply adopts a modular structural design. The first hardware switch module 2 connects the lithium battery module 1 and the bidirectional converter respectively, and the second hardware switch module 5 connects the bidirectional converter to the mains or load. The signal acquisition module 8 collects key parameters such as voltage and current of the lithium battery, mains or load in real time and transmits the collected data to the charge and discharge control module 9. The charge and discharge control module 9 intelligently controls the charge and discharge mode of the energy storage power supply system based on the collected data, and drives the display panel 10 to intuitively display the operating status. The modular design of this embodiment greatly improves the convenience of use and maintenance of the mobile energy storage power supply. In actual use, by adding or removing modules with the same function, the capacity and power of the energy storage power supply system can be quickly expanded. That is, multiple lithium battery modules 1 with the same parameters are connected to the mobile energy storage power supply system to expand the battery capacity, reducing the design cost of capacity parameters. The output interfaces of multiple modules are connected in parallel to achieve the expansion of the power of the entire system. The present invention provides an efficient and customizable solution for mobile energy storage power supply in scenarios such as field operations, emergency support and smart microgrids.

[0067] In a specific embodiment, see Figure 3 , the bidirectional converter includes a low voltage stabilizing capacitor C1, a bidirectional DC / DC converter 3, a high voltage stabilizing capacitor C2, a bidirectional DC / AC converter 4 and a filter inductor L1 connected in sequence;

[0068] The low-voltage stabilizing capacitor C1 is connected to the first hardware switch module 2 and is used to stabilize the DC voltage output by the lithium battery module 1 on the low-voltage side; the bidirectional DC / DC converter 3 is used to perform bidirectional step-up and step-down conversion on the DC voltage; the high-voltage stabilizing capacitor C2 is used to stabilize the 400V bus voltage on the DC high-voltage side; the bidirectional DC / AC converter 4 is used to perform bidirectional conversion between DC voltage and AC voltage, thereby realizing bidirectional flow of energy; the filter inductor L1 is connected to the second hardware switch module 5 and is used to filter the output voltage of the bidirectional DC / AC converter 4 or the output voltage of the external control target 7.

[0069] In order to achieve both grid-connected power quality management and emergency power generation functions, the present invention selects a bidirectional full-bridge DC / DC converter and a bidirectional full-bridge DC / AC converter as the main components, which can achieve high power transmission while also being able to quickly change the direction of energy transmission.

[0070] Specifically, see Figure 3 The low-voltage stabilizing capacitor C1 is connected in parallel between the second end of the first hardware switch module 2 and the first end of the bidirectional DC / DC converter 3 to stabilize the DC low-voltage side voltage.

[0071] The first end of the bidirectional DC / DC converter 3 is connected to a low-voltage stabilizing capacitor C1, and its second end is respectively connected to a high-voltage stabilizing capacitor C2 and the first end of the bidirectional DC / AC converter 4. The bidirectional DC / DC converter 3 provided in this embodiment includes switches S1-S8, a transformer T, an excitation inductor Lm, a resonant inductor Lr, and a filter capacitor Cr. The bidirectional DC / DC converter 3 utilizes the LLC resonant conversion characteristics to achieve DC / DC conversion, while the bidirectional full-bridge switch structure is used to achieve bidirectional conversion of DC voltage, ultimately achieving bidirectional conversion of 48V-400V DC voltage and bidirectional transmission of electrical energy.

[0072] The high-voltage stabilizing capacitor C2 is connected between the second terminal of the bidirectional DC / DC converter 3 and the first terminal of the bidirectional DC / AC converter 4 to stabilize the 400V bus voltage on the DC high-voltage side (i.e., the voltage at which the high-voltage stabilizing capacitor C2 is located).

[0073] The first end of bidirectional DC / AC converter 4 is connected to the second end of high-voltage stabilizing capacitor C2 and bidirectional DC / DC converter 3, respectively. Its second end is connected to the first end of filter inductor L1. In this embodiment, bidirectional DC / AC converter 4 includes switches S9-S12 and a full-bridge rectifier UR. Bidirectional DC / AC converter 4 employs a full-bridge structure to achieve bidirectional conversion of DC / AC voltage and current and bidirectional transmission of AC and DC voltage power.

[0074] The first end of the filter inductor L1 is connected to the second end of the bidirectional DC / AC converter 4, and the second end is connected to the mains or load through the relay RY1, which is used for filtering and cooperates with the bidirectional DC / AC converter 4 to complete AC / DC conversion.

[0075] In a specific embodiment, the first hardware switch module 2 includes two parallel relays, which are used to control the on-off state of the low-voltage side of the bidirectional converter according to the drive abnormality signal or the charge and discharge control signal; the second hardware switch module 5 includes three relays, which are used to control the on-off state of the high-voltage side of the bidirectional converter according to the drive abnormality signal or the charge and discharge control signal.

[0076] In this specific embodiment, please refer to Figure 3 The first end of the first hardware switch module 2 is connected to the lithium battery module 1, and the second end is connected to the low-voltage side of the bidirectional converter. At the same time, the relays RY3 and RY5 of the first hardware switch module 2 are arranged in parallel; the first end of the second hardware switch module 5 is connected to the high-voltage side of the bidirectional converter, and the second end is connected to the mains or external load through the 220V AC bidirectional interface 6 (i.e., the external interface). The relays RY1, RY2 and RY4 of the second hardware switch module 5 connect the bidirectional converter to the mains or the load, which can realize bidirectional conversion from DC to AC, so that electric energy can flow bidirectionally in the entire energy storage power supply system.

[0077] This invention utilizes the interaction of different relays to achieve control switching between different management states, enabling the mobile energy storage power supply to simultaneously perform emergency power generation and power quality management functions. The relays utilize a separate PCB design, increasing the copper surface area to enable high-power operation, capable of handling up to 10A of current.

[0078] In a specific embodiment, see Figure 2 The signal acquisition module 8 includes a voltage signal acquisition circuit, a current signal acquisition circuit and a temperature acquisition circuit; the voltage signal acquisition circuit is used to collect the lithium battery voltage of the lithium battery module 1, the voltage of the low-voltage stabilizing capacitor C1, the voltage of the high-voltage stabilizing capacitor C2 and the voltage of the external control target 7; the current signal acquisition circuit is used to collect the current of the lithium battery module 1 and the current of the external control target 7; the temperature acquisition circuit is used to collect the operating temperature of the bidirectional DC / DC converter 3 and the bidirectional DC / AC converter 4.

[0079] The various component circuits in the signal acquisition module 8 collect key parameter information such as the voltage and current of the lithium battery module 1, the high-voltage voltage-stabilizing capacitor C2, the mains and external load, and the temperature of the bidirectional converter switch tube during operation in real time, and transmit it to the charge and discharge control module 9 for further processing and judgment, thereby monitoring and controlling the entire energy storage power supply system.

[0080] In a specific embodiment, the charge and discharge control module 9 includes a DC / DC control processor and a DC / AC control processor;

[0081] The DC / DC control processor is used to receive and detect whether the current and voltage of the lithium battery module 1, the voltage of the low-voltage stabilizing capacitor C1, and the operating temperature of the bidirectional DC / DC converter 3 collected by the signal acquisition module 8 trigger an abnormal protection mechanism, and if so, generates a drive abnormality signal; the DC / AC control processor is used to receive and detect whether the voltage of the high-voltage stabilizing capacitor C2, the current and voltage of the external control target 7, and the operating temperature of the bidirectional DC / AC converter 4 collected by the signal acquisition module 8 trigger an abnormal protection mechanism, and if so, generates a drive abnormality signal;

[0082] The DC / DC control processor is communicatively connected to the DC / AC control processor, and is used to generate a charging and discharging control signal of the AC power according to the current and voltage of the lithium battery module 1 and the current and voltage of the AC power if the preset management requirement is associated with the AC power; if the preset management requirement is associated with the load, a charging control signal of the load is generated according to the current and voltage of the lithium battery module 1 and the current and voltage of the load; when a fault occurs in a control processor, a fault signal is sent to the other control processor, so that the other control processor generates a drive abnormality signal.

[0083] It can be understood that the DC / DC control processor receives and processes the voltage and current of the lithium battery module 1, the voltage of the voltage-stabilizing high-voltage capacitor C2, and the temperature parameters of the switch tube of the bidirectional DC / DC converter 3 transmitted by the signal acquisition module 8, and controls the operation of the DC / DC side by sending control signals to the switching components related to the DC / DC side, while determining whether the DC / DC side has overvoltage, overcurrent, or overtemperature.

[0084] The DC / AC control processor receives and processes the AC or external load voltage and current, the voltage of the high-voltage stabilizing capacitor, and the temperature parameters of the bidirectional DC / AC converter switches transmitted by the signal acquisition module 8. For example, it phase-locks the AC voltage and controls the operation of the DC / AC side by sending control signals to the relevant switching components on the DC / AC side. It also determines whether the DC / AC side has overvoltage, overcurrent, or overtemperature conditions.

[0085] The coordinated processing of the DC / DC control processor and the DC / AC control processor effectively improves the power management efficiency of the mobile energy storage power supply. When a need for external grid connection is detected, the charge and discharge control module 9 intelligently switches the charge and discharge modes of the energy storage power supply system based on the mobile energy storage power supply's own status (remaining power, whether it is in voltage management mode) and the mains voltage, implementing voltage management. When a need for external AC load connection is detected, the charge and discharge control module 9 intelligently controls the discharge process of the energy storage power supply system based on the energy storage power supply's own status and the external load's operating status, implementing emergency power supply. Simultaneously, the charge and discharge control module 9 drives the display panel 10 to intuitively display various operating status parameters of the energy storage power supply, enhancing the simplicity and practicality of the energy storage power supply in real-world use scenarios.

[0086] In a specific embodiment, the display panel 10 is provided with a control button, a DC / DC side operating status indicator light, and a DC / AC side operating indicator light. The control button can facilitate the operator to switch the working mode of the mobile energy storage power supply, and the control button may include a power button, a standby button, a grid-connected working button, a power quality management button, and an emergency power generation mode button; the charge and discharge control module 9 controls the operating state of the topology circuit module according to the control signal sent by the control button. The display modes of the indicator light include normal operation, standby state, initialization failure, overvoltage, overcurrent, overtemperature, undervoltage, 400V bus overvoltage and undervoltage, communication failure, and opposite side failure, etc., which can clearly and intuitively know the current operating state of the mobile energy storage power supply, and facilitate the operator to judge the specific operating state of the mobile energy storage power supply according to the operating state indicator lights on both sides.

[0087] According to actual needs, the display panel 10 can also display data such as the percentage of remaining power of the lithium battery, the voltage on the mains or external load side, and the charging and discharging power of the mobile energy storage power supply.

[0088] In one specific embodiment, the first hardware switch module 2 specifically uses a relay with a conduction voltage of 12V, and the second hardware switch module 5 specifically uses a relay with a conduction voltage of 5V. It should be noted that the lithium battery module 1 used in this embodiment has a capacity of 1-2kW·h and a nominal voltage of 48-60V. To adapt to voltage drive, the first hardware switch module 2 also includes a 48V-12V voltage converter and a switch button, thereby converting the DC voltage output by the lithium battery module 1 (e.g., 48V) into a suitable low-voltage drive voltage (12V) to drive the relay.

[0089] Furthermore, the mobile energy storage power supply is provided with a 12V output interface at the first hardware switch module 2, which can be connected to an interface integration module 11 having a 12V-5V power module and USB and Type-C interfaces. This allows the mobile energy storage power supply to provide a 5V voltage source internally, which can power components such as the display panel 10, as well as external power supply via the USB and Type-C interfaces. Similarly, the interface integration module 11 having a 12V-5V power module and USB and Type-C interfaces also adopts an interface module design, enabling quick connection and replacement.

[0090] The multifunctional modular mobile energy storage power supply provided in this embodiment adopts a modular design to greatly improve the convenience of use and maintenance of the energy storage power supply. By adding or removing modules with the same function, the system capacity and power can be quickly expanded. Among them, the lithium battery module 1, the hardware switch module, the bidirectional converter, and the charge and discharge control module 9 are all connected to the other modules through pluggable interfaces, which can quickly realize the assembly and disassembly of the mobile energy storage power supply, thereby greatly improving the convenience of the energy storage power supply during use and maintenance. By optimizing the external dimensions and modular assembly of each part of the energy storage power supply, its space occupancy is reduced to facilitate transportation and carrying. With the help of the design of the hardware switch module and the bidirectional converter, the present invention can more flexibly and conveniently participate in the management of mains power quality and emergency power supply for external loads, providing an efficient and customizable solution for mobile energy storage power supplies in scenarios such as field operations, emergency support, and smart microgrids.

[0091] See also Figure 4 The present invention also provides a method for managing electric energy of a multifunctional modular mobile energy storage power supply, the method involving any of the multifunctional modular mobile energy storage power supplies as described above, the method comprising:

[0092] Step 101: Obtain governance requirements, initialize operating parameters according to the governance requirements, and enter the corresponding governance mode.

[0093] It should be noted that the management requirements can be either the management requirements of the grid's mains power or the management requirements of the grid's load. In response to the fact that existing mobile energy storage power supplies lack power quality management capabilities and are unable to participate in grid power quality management, the present invention integrates the principles of mains power management and emergency power generation management through hardware optimization design to design a mobile energy storage power supply.

[0094] In this embodiment, after receiving the management requirements, the hardware interface and parameter variables (such as lithium battery voltage and external interface voltage amplitude, etc.) can be initialized first, and the corresponding management mode can be entered. Then, the mobile energy storage power supply can be used to implement power quality management in different scenarios according to different management modes.

[0095] Step 102: If the management demand is related to the mains, call the mobile energy storage power supply to connect to the mains and enter the power quality management mode, detect the operating data of the mobile energy storage power supply and the mains operation data, and implement the power quality management operation strategy for the mains according to the detection results.

[0096] It should be noted that the operating data of the mobile energy storage power supply may include parameters such as the current and voltage of the lithium battery module, the voltage of the low-voltage stabilizing capacitor C1, the operating temperature of the bidirectional DC / DC converter, the voltage of the high-voltage stabilizing capacitor C2, and the operating temperature of the bidirectional DC / AC converter; the operating data of the mains power may include data such as the mains voltage and mains current; in the power quality management mode, if the mains power fluctuates, the mobile energy storage power supply can be used to detect and adjust the mains voltage in real time to manage the mains power, thereby ensuring the operating stability and reliability of the mains power.

[0097] This step specifically includes:

[0098] Step S10: If the management demand is related to the mains power, call the mobile energy storage power supply to connect to the mains power and enter the power quality management mode.

[0099] Step S11: If a grid-connected working mode signal is received, the amplitude and phase angle of the mains power are tracked.

[0100] It is understandable that after entering the power quality management mode, if a grid-connected operating mode signal is received, grid-connected mains power processing needs to be performed, such as amplitude and phase tracking of the mains power. Before performing amplitude and phase tracking of the mains power, it is also necessary to determine whether the mobile energy storage power supply is connected to the mains power and whether the operating parameters have been initialized. Among them, in the grid-connected operating mode, the parameter variables in the operating parameters may include: lithium battery voltage, remaining power, voltage amplitude, frequency, and phase angle of the external interface, etc.

[0101] Step S12, detecting whether the lithium battery voltage is normal. If the lithium battery voltage is abnormal, abnormal information of the lithium battery voltage is generated, and the mobile energy storage power supply is controlled to enter a standby mode.

[0102] See also Figure 3 In standby mode, relays RY3 and RY5 of the mobile energy storage power supply are closed, and relays RY1, RY2 and RY4 are disconnected. This ensures that the battery energy of the mobile energy storage power supply will not leak to ensure the safety of power management, while keeping the mobile energy storage power supply ready for management at any time.

[0103] Step S13: If the lithium battery voltage is normal, the mains voltage is determined according to the collected mains amplitude and phase angle, and whether the mains voltage is normal is judged.

[0104] It should be noted that after determining the mains voltage based on the collected mains amplitude and phase angle, the mains voltage is then determined to be normal based on a preset voltage range. Under normal operating conditions, the mains voltage amplitude will be within a certain range. If the mains voltage amplitude is within the preset voltage range, the mains is considered normal; otherwise, it is considered abnormal.

[0105] Step S14: If the mains voltage is abnormal, the mobile energy storage power supply is called to perform charging and discharging operations according to the abnormal state of the mains voltage.

[0106] In this embodiment, if the mains voltage is abnormal, a mobile energy storage power supply is required to manage the mains power to ensure the reliability and safety of the mains operation.

[0107] Step S15: During the charging and discharging process, if the abnormal protection mechanism is triggered, a driving abnormality signal is generated according to the triggered abnormal protection mechanism, and the mobile energy storage power supply is controlled to enter a standby mode.

[0108] In this embodiment, the conditions for triggering the abnormal protection mechanism may be triggering an overvoltage, overcurrent, overtemperature or undervoltage protection mechanism; if the abnormal protection mechanism is triggered by the acquisition parameters such as the voltage of the low-voltage stabilizing capacitor C1, the voltage of the high-voltage stabilizing capacitor C2, the operating temperature of the bidirectional DC / DC converter and the operating temperature of the bidirectional DC / AC converter, it is necessary to immediately stop the power management process, that is, stop the energy exchange between the mobile energy storage power supply and the mains, and display the corresponding fault abnormality information through the status indicator light, and the operator shall determine whether to completely exit the power management.

[0109] Furthermore, if the mains voltage is abnormal, the mobile energy storage power supply is called upon to start the charging and discharging operation according to the abnormal state of the mains voltage, which specifically includes:

[0110] Step S20: When the mains voltage amplitude is lower than the set minimum value, the mobile energy storage power supply is called to discharge the mains output power.

[0111] Under normal operating conditions, the voltage amplitude of the mains power will be within the preset voltage range. If the voltage amplitude of the mains power is lower than the set minimum value within the preset voltage range, it indicates that the mains power supply is insufficient or the voltage is low. At this time, the mobile energy storage power supply can be called to discharge the output power to the mains power to ensure the normal operation of the mains power.

[0112] In this embodiment, when the mains voltage amplitude is lower than the set minimum value, the working process of the mobile energy storage power supply includes: when the mains voltage amplitude is lower than the set minimum value, controlling the energy storage power supply system to switch to the grid-connected discharge state through the charge and discharge control module; closing the relay RY1 of the bidirectional full-bridge DC / AC converter to control the bidirectional full-bridge DC / DC converter to be in the reverse working state; the lithium battery module outputs power to the high-voltage stabilizing capacitor C2 through the bidirectional full-bridge DC / DC converter; wherein the voltage of the high-voltage stabilizing capacitor C2 corresponds to the bus voltage;

[0113] When the voltage of high-voltage stabilizing capacitor C2 rises to 400V, the bidirectional full-bridge DC / AC converter is controlled to operate in a grid-connected discharge mode. The DC voltage of the lithium battery module is converted to AC voltage by the bidirectional full-bridge DC / AC converter and transmitted to the mains in a grid-connected manner. At this point, the output voltage and output current of the mobile energy storage power supply are almost in anti-phase.

[0114] Step S21: When the mains voltage amplitude is higher than the set maximum value, the mobile energy storage power supply is called to absorb power from the mains to charge and store energy.

[0115] If the mains voltage amplitude is higher than the set maximum value within the preset range, it indicates that the mains voltage is too high. At this time, the mobile energy storage power supply can be called to absorb power from the mains for energy storage to ensure the normal operation of the mains.

[0116] In this embodiment, when the mains voltage amplitude is higher than a set maximum value, the operation process of the mobile energy storage power supply includes: when the mains voltage amplitude is higher than the set maximum value, controlling the energy storage power supply system to switch to a grid-connected charging state through the charge and discharge control module; in the energy storage power supply system, closing relays RY2 and RY4 of the bidirectional full-bridge DC / AC converter, converting the AC voltage output by the mains into a DC voltage through the rectifier full-bridge UR of the bidirectional full-bridge DC / AC converter, and transmitting the energy of the DC voltage to the high-voltage stabilizing capacitor C2;

[0117] When it is detected that the voltage of the high-voltage stabilizing capacitor C2 rises to 300V, relays RY2 and RY4 are disconnected, and relay RY1 is closed. The voltage of the high-voltage stabilizing capacitor C2 is raised to 400V by controlling the bidirectional full-bridge DC / AC converter. At this time, the bidirectional full-bridge DC / AC converter operates in the grid-connected charging state, and the bidirectional full-bridge DC / DC converter is controlled to operate in the forward working state, so that the mains output power is transmitted to the bidirectional full-bridge DC / AC converter, and the energy output by the mains is converted into DC voltage through the bidirectional full-bridge DC / AC converter, and the DC voltage is transmitted to the lithium battery through the bidirectional full-bridge DC / DC converter, thereby realizing charging of the mobile energy storage power supply from the mains. At this time, the output voltage and output current of the mobile energy storage power supply are almost in phase.

[0118] Step S22: When the mains power returns to normal and it is detected that the power transmission between the mobile energy storage power supply and the mains power drops to zero, the mobile energy storage power supply is controlled to enter the standby mode.

[0119] It is understandable that if there are no abnormalities during the power management process, you can wait for the mobile energy storage power supply and the mains to complete the entire grid-connected power quality management work, and then control the mobile energy storage power supply to enter standby mode to wait for the next round of power management work.

[0120] Step 103: If the management demand is associated with the load, enter the emergency power generation mode, control the mobile energy storage power supply to supply power and store energy, and after the power supply and storage are completed, call the mobile energy storage power supply to connect to the load and power the load; during the power supply process, detect the operating data of the mobile energy storage power supply and the operating data of the load, and execute the load management operation strategy according to the detection results.

[0121] It should be noted that the operating data of the mobile energy storage power supply may include parameters such as the current and voltage of the lithium battery module, the voltage of the low-voltage stabilizing capacitor C1, the operating temperature of the bidirectional DC / DC converter, the voltage of the high-voltage stabilizing capacitor C2, and the operating temperature of the bidirectional DC / AC converter; the operating data of the load may include data such as the load voltage and load current; in the emergency power generation mode, the mobile energy storage power supply can detect the load voltage in real time to supply power to the load, thereby providing stable power support for critical loads.

[0122] This step specifically includes:

[0123] Step S30: If the control demand is associated with the load, enter the emergency power generation mode, control the mobile energy storage power supply to supply power and store energy, and after the power supply and storage is completed, call the mobile energy storage power supply to connect to the load and supply power to the load.

[0124] It should be noted that in the event of a power outage or emergency rescue, the mobile energy storage power supply can respond quickly, switch to emergency power generation mode, and provide stable power support for critical loads.

[0125] In this embodiment, in the emergency power generation mode, the working process of the mobile energy storage power supply includes: in the emergency power generation mode, the charge and discharge control module controls the energy storage power supply system to switch to the emergency power generation state; in the energy storage power supply system, the relay RY1 is closed to control the bidirectional full-bridge DC / DC converter to be in the reverse working state; the lithium battery module outputs power to the capacitor C2 through the bidirectional full-bridge DC / DC converter;

[0126] When it is detected that the voltage of the high-voltage stabilizing capacitor C2 rises to 400V, the bidirectional full-bridge DC / AC converter is controlled to operate in the inverter state; the DC voltage of the lithium battery module is converted into a 220V AC voltage through the bidirectional full-bridge DC / AC converter; the mobile energy storage power supply is called to connect to the load, and the bidirectional full-bridge DC / AC converter transmits 220V AC voltage to the load.

[0127] For ease of understanding, the following further describes the working states of the bidirectional full-bridge DC / DC converter and the bidirectional full-bridge DC / AC converter:

[0128] 1) Bidirectional full-bridge DC / DC converter:

[0129] In the forward working state, the switches S5-S8 work in the inverter state, and the switches S1-S4 are in the cut-off state. At this time, the four body diodes corresponding to the switches S1-S4 form a bridge rectifier, and energy is transmitted from the right side to the left side of the circuit; in the reverse working state, the switches S1-S4 work in the inverter state, and the switches S5-S8 are in the cut-off state. At this time, the four body diodes corresponding to the switches S5-S8 form a bridge rectifier, and energy is transmitted from the left side to the right side of the circuit.

[0130] Taking a bidirectional full-bridge DC / DC converter operating in the forward state as an example, the drive signal frequency is adjusted to achieve simultaneous diagonal switching of the full bridge, staggered off-diagonal switching, and complete forward and reverse conduction. Ignoring dead zones, the operating duty cycle of each switch is 50%. During the positive half-cycle of a cycle, the drive voltages for S5 and S8 are high, turning them on. Current transfers from the body diodes of S5 and S8 to the S5 and S8 switches. At this time, the body diodes of S1 and S4 on the left side of transformer T conduct, charging the lithium battery module. Due to the circuit structure, the current in the body diodes of S1 and S4 will initially increase and then gradually decrease. When the drive voltages for S5 and S8 reach a low level, turning them off, current transfers from the S5 and S8 switches to the body diodes of S6 and S7. During the negative half cycle, the driving voltage of S6 and S7 is high and both are turned on. The current is transferred from the body diodes of S6 and S7 to the S6 and S7 switches. At this time, the body diodes of S2 and S3 on the left side of the transformer T are turned on to charge the lithium battery module. Due to the circuit structure characteristics, the current on the body diodes of S2 and S3 will first increase and then gradually decrease. When the driving voltage of S6 and S7 becomes low and both are turned off, the current is transferred from the S6 and S7 switches to the S5 and S8 body diodes to charge the lithium battery module.

[0131] 2) Bidirectional full-bridge DC / AC converter:

[0132] In the grid-connected charging state, electric energy flows from the AC side to the DC side. In the first half of a cycle, switch tubes S9 and S12 are turned on, and switch tubes S10 and S11 are turned off. At this time, the current transmission direction is the external interface, switch tube S9, high-voltage stabilizing capacitor C2 and bidirectional full-bridge DC / DC converter, switch tube S12, filter inductor L1 and relay RY1. In the second half of the cycle, switch tubes S10 and S11 are turned on, and switch tubes S9 and S12 are turned off. At this time, the current transmission direction is the external interface, relay RY1, filter inductor L1, switch tube S11, high-voltage stabilizing capacitor C2 and bidirectional full-bridge DC / DC converter and switch tube S10.

[0133] In the grid-connected discharge state / inversion state, electric energy flows from the DC side to the AC side. In the first half of a cycle, switch tubes S10 and S11 are turned on, and switch tubes S9 and S12 are turned off. At this time, the current transmission direction is, in sequence, the high-voltage stabilizing capacitor C2 and the bidirectional full-bridge DC / DC converter, switch tube S11, filter inductor L1, relay RY1, external interface, and switch tube S10; in the second half of the cycle, switch tubes S9 and S12 are turned on, and switch tubes S10 and S11 are turned off. At this time, the current transmission direction is, in sequence, the capacitor C2 and the bidirectional full-bridge DC / DC converter, switch tube S9, external interface, relay RY1, filter inductor L1, and switch tube S12.

[0134] Step S31: During the process of supplying power to the load, if an abnormality is detected in the lithium battery voltage, abnormal information of the lithium battery voltage is generated, and the mobile energy storage power supply is controlled to enter the standby mode; if the abnormal protection mechanism is triggered, a driving abnormality signal is generated according to the triggered abnormal protection mechanism, and the mobile energy storage power supply is controlled to enter the standby mode.

[0135] After the abnormal protection mechanism is triggered, the power management process needs to be stopped immediately, that is, the energy exchange between the mobile energy storage power supply and the load needs to be stopped, and the fault information will be displayed through the status indicator light. The operator will decide whether to completely exit the power management.

[0136] Step S32: When the exit signal is received, the mobile energy storage power supply is stopped from supplying power to the load, and the mobile energy storage power supply is controlled to enter a standby mode.

[0137] It is understandable that if there are no abnormal conditions during the power management process, the mobile energy storage power supply and the load can be waited for to complete the entire grid-connected power quality management work, and then the mobile energy storage power supply can be controlled to enter the standby mode to wait for the next round of power management work.

[0138] The multifunctional emergency mobile energy storage power supply management method provided by the present invention has the following advantages:

[0139] 1. The present invention triggers different power management modes, such as power quality management mode and emergency power generation mode, according to different grid application scenarios to meet diverse power needs. When the mains power fluctuates, the mobile energy storage power supply manages the mains power by real-time monitoring and adjusting the amplitude and phase angle of the mains power to ensure the stability and reliability of the mains power. In the event of a power outage or emergency rescue, the mobile energy storage power supply responds quickly to provide stable power support for critical loads.

[0140] 2. Considering that existing mobile energy storage power supplies lack corresponding functions in working scenarios such as emergency support and mains power quality management, the mobile energy storage power supply provided by the present invention has made optimization and improvement in hardware, effectively expanding the working mode of the mobile energy storage power supply. At the same time, it has large capacity, high power and portability, so that the mobile energy storage power supply can achieve flexible and efficient operation in scenarios such as outdoor operations, emergency power supply and smart microgrids.

[0141] The terms "first", "second", etc. in the specification and claims of this application and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate so that the embodiments described herein can be implemented in a sequence other than that illustrated or described herein. The term "and / or" in this application is merely a description of the association relationship of associated objects, indicating that three relationships can exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or modules is not necessarily limited to those steps or modules clearly listed, but may include other steps or modules that are not clearly listed or inherent to these processes, methods, products or devices. The naming or numbering of steps in this application does not mean that the steps in the method flow must be executed in the time / logical sequence indicated by the naming or numbering. The execution order of the named or numbered process steps can be changed according to the technical purpose to be achieved, as long as the same or similar technical effects can be achieved. The division of modules in this application is a logical division. There may be other division methods when implementing in actual applications. For example, multiple modules can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the coupling or direct coupling or communication connection between each other shown or discussed can be through some ports, and the indirect coupling or communication connection between modules can be electrical or other similar forms, which are not limited in this application. In addition, the modules or sub-modules described as separate components may or may not be physically separated, may or may not be physical modules, or may be distributed in multiple circuit modules, and some or all of the modules can be selected according to actual needs to achieve the purpose of the solution of this application.

[0142] In the several embodiments provided in this application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are merely schematic. For example, the division of the units is merely a logical function division. In actual implementation, there may be other division methods, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be an indirect coupling or communication connection through some interfaces, devices or units, which can be electrical, mechanical or other forms.

[0143] The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of these units may be selected to achieve the purpose of this embodiment according to actual needs.

[0144] In addition, the functional units in the various embodiments of the present invention may be integrated into a single processing unit, each unit may exist physically separately, or two or more units may be integrated into a single unit. The aforementioned integrated units may be implemented in the form of hardware or software functional units.

[0145] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, or the portion that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions for causing a computer device (which can be a personal computer, server, or network device, etc.) to execute all or part of the steps of the method described in each embodiment of the present invention. The aforementioned storage medium includes various media that can store program code, such as a USB flash drive, a mobile hard drive, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk.

[0146] Those skilled in the art will clearly understand that, for the convenience and brevity of description, the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art will understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features thereof may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A multifunctional modular mobile energy storage power supply, characterized in that: include: Energy storage power supply system and monitoring system; the energy storage power supply system is electrically connected to the monitoring system; The energy storage power supply system includes a lithium battery module, a first hardware switch module, a bidirectional converter, and a second hardware switch module connected in sequence via a pluggable interface; the energy storage power supply system is connected to an external control target via the second hardware switch module; the bidirectional converter is used to achieve bidirectional energy flow between the lithium battery module and the external control target; The monitoring system includes a signal acquisition module, a charge and discharge control module and a display panel connected in sequence; The signal acquisition module is used to collect the lithium battery voltage of the lithium battery module, the operating data of the external control target and the operating data of the bidirectional converter and upload the collected data to the charge and discharge control module; The charge and discharge control module is used to receive and judge the collected data of the signal acquisition module; Generate a charge and discharge control signal according to preset management requirements and the collected data, and send the charge and discharge control signal to the energy storage power supply system, so that the energy storage power supply system provides charge and discharge services to the external management target; During the charging and discharging process, if the collected data triggers an abnormality protection mechanism, a drive abnormality signal is generated and sent to the energy storage power supply system to control the energy storage power supply system to switch to a standby state, and the charge and discharge control signal, the drive abnormality signal and the collected data are uploaded to the display panel; The display panel is used to receive the abnormal driving signal, the charge and discharge control signal and the collected data and display corresponding display data.

2. The multifunctional modular mobile energy storage power supply according to claim 1, characterized in that: The bidirectional converter includes a low-voltage stabilizing capacitor, a bidirectional DC / DC converter, a high-voltage stabilizing capacitor, a bidirectional DC / AC converter and a filter inductor connected in sequence; The low-voltage stabilizing capacitor is connected to the first hardware switch module and is used to stabilize the DC voltage output by the lithium battery module on the low-voltage side; The bidirectional DC / DC converter is used to perform bidirectional step-up and step-down conversion on the DC voltage; The high-voltage stabilizing capacitor is used to stabilize the 400V bus voltage on the DC high-voltage side; The bidirectional DC / AC converter is used to perform bidirectional conversion between DC voltage and AC voltage, thereby achieving bidirectional flow of energy; The filter inductor is connected to the second hardware switch module and is used to filter the output voltage of the bidirectional DC / AC converter or the output voltage of the external control target.

3. The multifunctional modular mobile energy storage power supply according to claim 1, characterized in that: The first hardware switch module includes two parallel relays, which are used to control the on-off state of the low-voltage side of the bidirectional converter according to the abnormal driving signal or the charge and discharge control signal; The second hardware switch module includes three relays, which are used to control the on / off state of the high-voltage side of the bidirectional converter according to the abnormal driving signal or the charge and discharge control signal.

4. The multifunctional modular mobile energy storage power supply according to claim 2, characterized in that: The signal acquisition module includes a voltage signal acquisition circuit, a current signal acquisition circuit and a temperature acquisition circuit; The voltage signal acquisition circuit is used to collect the voltage of the lithium battery of the lithium battery module, the voltage of the low-voltage stabilizing capacitor, the voltage of the high-voltage stabilizing capacitor and the voltage of the external control target; The current signal acquisition circuit is used to collect the current of the lithium battery module and the current of the external control target; The temperature acquisition circuit is used to acquire the operating temperatures of the bidirectional DC / DC converter and the bidirectional DC / AC converter.

5. The multifunctional modular mobile energy storage power supply according to claim 4, characterized in that: The external control target is specifically the mains or the load; the charge and discharge control module includes a DC / DC control processor and a DC / AC control processor; The DC / DC control processor is used to receive and detect whether the current and voltage of the lithium battery module, the voltage of the low-voltage stabilizing capacitor, and the operating temperature of the bidirectional DC / DC converter collected by the signal acquisition module trigger an abnormal protection mechanism, and if so, generate a drive abnormality signal; the DC / AC control processor is used to receive and detect whether the voltage of the high-voltage stabilizing capacitor, the current and voltage of the external control target, and the operating temperature of the bidirectional DC / AC converter collected by the signal acquisition module trigger an abnormal protection mechanism, and if so, generate a drive abnormality signal; The DC / DC control processor is communicatively connected to the DC / AC control processor, and is used to generate a charging and discharging control signal of the mains according to the current and voltage of the lithium battery module and the current and voltage of the mains if the preset management demand is associated with the mains; and to generate a charging control signal of the load according to the current and voltage of the lithium battery module and the current and voltage of the load if the preset management demand is associated with the load; when a fault occurs in a control processor, a fault signal is sent to the other control processor, so that the other control processor generates a drive abnormality signal.

6. The multifunctional modular mobile energy storage power supply according to claim 1, characterized in that: The display panel is provided with control buttons, a DC / DC side operating status indicator light and a DC / AC side operating indicator light.

7. The multifunctional modular mobile energy storage power supply according to claim 3, characterized in that: The first hardware switch module specifically adopts a relay with a conduction voltage of 12V, and the second hardware switch module specifically adopts a relay with a conduction voltage of 5V.

8. A method for managing electric energy of a multifunctional modular mobile energy storage power supply, characterized in that: The method relates to the multifunctional modular mobile energy storage power supply according to any one of claims 1 to 7, and the method comprises: Obtain governance requirements, initialize operating parameters according to the governance requirements and enter the corresponding governance mode; If the management demand is related to the mains power, call the mobile energy storage power supply to connect to the mains power and enter the power quality management mode, detect the operating data of the mobile energy storage power supply and the operating data of the mains power, and implement the power quality management operation strategy for the mains power according to the detection results; If the management demand is associated with the load, enter the emergency power generation mode, control the mobile energy storage power supply to supply power and store energy, and after the power supply and energy storage are completed, call the mobile energy storage power supply to connect to the load and power the load; during the power supply process, detect the operating data of the mobile energy storage power supply and the operating data of the load, and execute the load management operation strategy according to the detection results.

9. The electric energy management method of the multifunctional modular mobile energy storage power supply according to claim 8, characterized in that: If the control demand is associated with the mains power, calling a mobile energy storage power supply to connect to the mains power and enter a power quality control mode, detecting the operating data of the mobile energy storage power supply and the operating data of the mains power, and implementing a power quality control operation strategy for the mains power according to the detection results, the steps include: If the control demand is related to the mains power, call the mobile energy storage power supply to connect to the mains power and enter the power quality control mode; If a grid-connected working mode signal is received, the amplitude and phase angle of the mains power are tracked; Detecting whether the lithium battery voltage is normal; if the lithium battery voltage is abnormal, generating abnormal information of the lithium battery voltage and controlling the mobile energy storage power supply to enter a standby mode; If the lithium battery voltage is normal, determining the mains voltage according to the collected amplitude and phase angle of the mains, and judging whether the mains voltage is normal; If the mains voltage is abnormal, calling the mobile energy storage power supply to charge and discharge the mains according to the abnormal state of the mains voltage; During the charging and discharging process, if the abnormal protection mechanism is triggered, a driving abnormality signal is generated according to the triggered abnormal protection mechanism, and the mobile energy storage power supply is controlled to enter the standby mode.

10. The electric energy management method of the multifunctional modular mobile energy storage power supply according to claim 8, characterized in that: If the control demand is associated with the load, the system enters the emergency power generation mode, controls the mobile energy storage power supply to supply power and store energy, and after the power supply and storage is completed, calls the mobile energy storage power supply to connect to the load and supply power to the load; The steps of detecting the operating data of the mobile energy storage power supply and the operating data of the load during the power supply process, and executing the load management operation strategy according to the detection results, include: If the control demand is associated with the load, the system enters the emergency power generation mode, controls the mobile energy storage power supply to supply power and store energy, and after the power supply and storage is completed, calls the mobile energy storage power supply to connect to the load and supply power to the load; In the process of supplying power to the load, if an abnormality is detected in the lithium battery voltage, abnormal information of the lithium battery voltage is generated, and the mobile energy storage power supply is controlled to enter the standby mode; if the abnormal protection mechanism is triggered, a driving abnormality signal is generated according to the triggered abnormal protection mechanism, and the mobile energy storage power supply is controlled to enter the standby mode; When the exit signal is received, the mobile energy storage power supply is stopped from supplying power to the load, and the mobile energy storage power supply is controlled to enter a standby mode.

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