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

Abstract

The application discloses a multifunctional modular mobile energy storage power supply and an electric energy treatment method; the mobile energy storage power supply provided by the application adopts a modular structure design, and the convenience of use and maintenance of the mobile energy storage power supply is greatly improved; meanwhile, the module cooperation operation among a lithium battery module, a first hardware switch module, a bidirectional converter, a second hardware switch module and a signal acquisition module, a charge-discharge control module and a display panel of a monitoring system of the energy storage power supply system is used to provide an electric energy quality treatment function and an emergency power generation function for external treatment targets, and the mobile energy storage power supply has the performances of large capacity, high power and portability, and can work flexibly and efficiently in outdoor operation, emergency power use and intelligent microgrid scenes.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of mobile energy storage power supply, and particularly relates to a multifunctional modular mobile energy storage power supply and an electric energy management method. BACKGROUND

[0002] Under the background of energy transformation, the proportion of renewable energy such as wind power and photovoltaic power is increasing, but the intermittency and instability of power generation bring challenges to the stable operation of the power grid. Mobile energy storage power supply can effectively promote the consumption of new energy and enhance the stability of the power grid by storing and releasing electric energy at appropriate times. In addition, with the improvement of social development level, outdoor travel, camping, field work and other activities are becoming more and more frequent, and the demand for outdoor electricity is increasing. At the same time, the demand for emergency power supply in emergency situations such as natural disasters is becoming more and more urgent. Mobile energy storage power supply can meet these demands with its characteristics of large capacity, high power, safety and portability. In addition, the continuous maturity and cost reduction of lithium ion battery technology, as well as the progress of related technologies such as power electronics technology and intelligent control technology, provide strong support for the development of mobile energy storage power supply. Various policy support measures also provide protection for its technological innovation and market promotion.

[0003] However, the current mobile energy storage power supply often adopts an integrated design, that is, each part is highly integrated on the same mainboard, and users can only use several modes set by the manufacturer. Especially when a part of it fails, due to this high integration, it can only be returned for repair or directly scrapped, which also limits the flexibility of energy storage power supply in use and maintenance. At the same time, in the face of the instability brought by the access of new energy such as photovoltaic power and wind power to the power grid, as well as the unstable voltage of the power grid in remote places, the existing mobile energy storage power supply has obvious defects in function, especially the lack of power quality management function. And due to the lack of this key function, the mobile energy storage power supply cannot effectively feed back the power quality of the power grid when connected to the power grid. SUMMARY

[0004] The present application provides a multifunctional modular mobile energy storage power supply and an electric energy management method, which is used to solve the technical problems of poor maintenance flexibility caused by the highly integrated design of the existing mobile energy storage power supply, and the inability to effectively participate in the management of the power quality of the power grid due to the lack of power quality management function in the work scene.

[0005] The present application 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 with the monitoring system;

[0006] The energy storage power supply system comprises a lithium battery module, a first hardware switch module, a bidirectional converter and a second hardware switch module connected in sequence through a pluggable interface; the energy storage power supply system is connected with an external management target through the second hardware switch module; the bidirectional converter is used to realize the bidirectional flow of energy between the lithium battery module and the external management target;

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

[0008] The signal acquisition module is used to acquire the lithium battery voltage of the lithium battery module, the operation data of the external management target and the operation data of the bidirectional converter and upload the acquired data to the charge-discharge control module;

[0009] The charge-discharge control module is used to receive and judge the acquired data of the signal acquisition module; generate a charge-discharge control signal according to the preset management requirement and the acquired data, send the charge-discharge control signal to the energy storage power supply system, so that the energy storage power supply system provides charge-discharge service to the external management target; in the charge-discharge process, if the acquired data triggers an abnormal protection mechanism, generate a driving abnormal signal and send the driving abnormal signal to the energy storage power supply system, so as to control the energy storage power supply system to switch to a standby state, and upload the charge-discharge control signal, the driving abnormal signal and the acquired data to the display panel;

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

[0011] Optionally, the bidirectional converter comprises 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 with the first hardware switch module and is used to stabilize the direct current 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 direct current voltage;

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

[0015] The bidirectional DC / AC converter is used to perform bidirectional conversion between the direct current voltage and the alternating current voltage, so as to realize the bidirectional flow of energy;

[0016] The filter inductor is connected with the second hardware switch module, and is used for filtering the output voltage of the bidirectional DC / AC converter or the output voltage of the external management target.

[0017] Optionally, the first hardware switch module comprises two parallel relays, and is used for controlling the low-voltage side on-off state of the bidirectional converter according to the driving abnormal signal or the charge-discharge control signal.

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

[0019] Optionally, the signal acquisition module comprises a voltage signal acquisition circuit, a current signal acquisition circuit and a temperature acquisition circuit.

[0020] The voltage signal acquisition circuit is used for acquiring the lithium battery voltage 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 management target.

[0021] The current signal acquisition circuit is used for acquiring the current of the lithium battery module and the current of the external management target.

[0022] The temperature acquisition circuit is used for acquiring the operating temperature of the bidirectional DC / DC converter and the bidirectional DC / AC converter.

[0023] Optionally, the external management target is specifically a commercial power or a load; and the charge-discharge control module comprises a DC / DC control processor and a DC / AC control processor.

[0024] The DC / DC control processor is used for receiving and detecting whether the current voltage of the lithium battery module, the voltage of the low-voltage stabilizing capacitor and the operating temperature of the bidirectional DC / DC converter acquired by the signal acquisition module trigger an abnormal protection mechanism, and generating a driving abnormal signal if the trigger is detected; and the DC / AC control processor is used for receiving and detecting whether the voltage of the high-voltage stabilizing capacitor, the current voltage of the external management target and the operating temperature of the bidirectional DC / AC converter acquired by the signal acquisition module trigger an abnormal protection mechanism, and generating a driving abnormal signal if the trigger is detected.

[0025] The DC / DC control processor is in communication connection with the DC / AC control processor, and is used for generating a charge-discharge control signal of the commercial power according to the current voltage of the lithium battery module and the current voltage of the commercial power if the preset management demand is associated with the commercial power, generating a charge control signal of the load according to the current voltage of the lithium battery module and the current voltage of the load if the preset management demand is associated with the load, and sending a fault signal to the other control processor to make the other control processor generate a driving abnormal signal when a certain control processor fails.

[0026] Optionally, the display panel is provided with a control button, a DC / DC side operation state indicator lamp and a DC / AC side operation indicator lamp.

[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 application further provides an electric energy management method of the multifunctional modular mobile energy storage power supply.

[0029] The management demand is acquired, the running parameters are initialized according to the management demand, and a corresponding management mode is entered;

[0030] If the management demand is associated with the commercial power, the mobile energy storage power supply is called to access the commercial power and enter an electric energy quality management mode, the running data of the mobile energy storage power supply and the running data of the commercial power are detected, and an electric energy quality management running strategy is performed on the commercial power according to the detection result.

[0031] If the management demand is associated with the load, an emergency power generation mode is entered, the mobile energy storage power supply is controlled to perform power supply and energy storage, after the power supply and energy storage is completed, the mobile energy storage power supply is called to access the load and supply power to the load, and the running data of the mobile energy storage power supply and the running data of the load are detected during the power supply process, and a load management running strategy is executed according to the detection result.

[0032] Optionally, the step of calling the mobile energy storage power supply to access the commercial power and enter the electric energy quality management mode, detecting the running data of the mobile energy storage power supply and the running data of the commercial power, and performing the electric energy quality management running strategy on the commercial power according to the detection result if the management demand is associated with the commercial power, comprises the following steps.

[0033] If the management demand is associated with the commercial power, the mobile energy storage power supply is called to access the commercial power and enter the electric energy quality management mode.

[0034] If a grid-connected working mode signal is received, the amplitude and phase angle of the commercial 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 amplitude and phase angle of the collected mains, and judging whether the mains voltage is normal;

[0037] if the mains voltage is abnormal, calling the mobile energy storage power supply to perform charging and discharging operation on the mains according to the abnormal state of the mains voltage;

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

[0039] Optionally, if the management demand is associated with the load, entering an emergency power generation mode, controlling the mobile energy storage power supply to perform power supply and energy storage, after the power supply and energy storage is completed, calling the mobile energy storage power supply to access the load and supply power to the load; detecting the operation data of the mobile energy storage power supply and the operation data of the load in the power supply process, and executing the load management operation strategy according to the detection result, including:

[0040] if the management demand is associated with the load, entering an emergency power generation mode, controlling the mobile energy storage power supply to perform power supply and energy storage, after the power supply and energy storage is completed, calling the mobile energy storage power supply to access the load and supply power to the load;

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

[0042] when the exit signal is received, stopping the mobile energy storage power supply from supplying power to the load, and controlling the mobile energy storage power supply to enter the standby mode.

[0043] From the above technical solutions, the present application has the following advantages:

[0044] The application provides a multifunctional modular mobile energy storage power supply and an electric energy management method.

[0045] The monitoring system comprises a signal acquisition module, a charge-discharge control module and a display panel connected in sequence; the signal acquisition module is used for acquiring the lithium battery voltage of the lithium battery module, the operation data of the external management target and the operation data of the bidirectional converter and uploading the acquired data to the charge-discharge control module; the charge-discharge control module is used for receiving and judging the acquired data of the signal acquisition module; the charge-discharge control signal is generated according to the preset management requirement and the acquired data, the charge-discharge control signal is sent to the energy storage power supply system, so that the energy storage power supply system provides the charge-discharge service to the external management target; during the charge-discharge process, if the acquired data triggers the abnormal protection mechanism, the driving abnormal signal is generated and sent to the energy storage power supply system, so that the energy storage power supply system is switched to the standby state, and the charge-discharge control signal, the driving abnormal signal and the acquired data are uploaded to the display panel; the display panel is used for receiving the driving abnormal signal, the charge-discharge control signal and the acquired data and displaying the corresponding display data.

[0046] In the application, the modular design is adopted to greatly improve the convenience of use and maintenance of the mobile energy storage power supply; meanwhile, the module cooperation operation among 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 and the signal acquisition module, the charge-discharge control module and the display panel of the monitoring system provides the electric energy quality management function and the emergency power generation function for the external management target, so that the technical problems that the existing mobile energy storage power supply has poor maintenance flexibility due to the highly integrated design and cannot effectively participate in the electric energy quality management of the power grid due to the lack of electric energy quality management function and other work scene technical problems are solved. BRIEF DESCRIPTION OF DRAWINGS

[0047] In order to more clearly illustrate the technical solutions in the embodiments of the application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description only some embodiments of the application, and for those skilled in the art, other drawings can be obtained without creative labor under the premise of these drawings.

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

[0049] Figure 2 The overall structure connection schematic diagram of one embodiment of a multifunctional modular mobile energy storage power supply provided in the application;

[0050] Figure 3 The circuit structure schematic diagram of one embodiment of an energy storage power supply system provided in the application;

[0051] Figure 4 The step flow chart of an electric energy management method of a multifunctional modular mobile energy storage power supply provided in the application;

[0052] In the drawings, reference numerals are:

[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 alternating current bidirectional interface 6, external management target 7, signal acquisition module 8, charge and discharge control module 9, display panel 10 and interface integrated module 11. DETAILED DESCRIPTION

[0054] The embodiment of the application provides a multifunctional modular mobile energy storage power supply and an electric energy management method, and is used for solving the technical problems that the mobile energy storage power supply has poor maintenance flexibility due to high integration design, and cannot effectively participate in the electric energy quality management of a power grid due to the lack of electric energy quality management functions and the like working scenarios.

[0055] In order to make the application purpose, features and advantages of the application more obvious and easy to understand, the technical solutions in the embodiments of the application will be clearly and completely described below in combination with the drawings in the embodiments of the application. Obviously, the following described embodiments are only part of the embodiments of the application, rather than all the embodiments of the application. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative labor are within the protection scope of the application.

[0056] In the description of the application, it should be noted that the orientations or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the application and simplifying the description, and are not intended to indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the application. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0057] Unless otherwise defined, the terms "mounting", "connected", "connecting" should be understood broadly, for example, can be fixedly connected, can be detachably connected, or integrally connected; can be mechanically connected, or electrically connected; can be directly connected, or indirectly connected through an intermediate medium, or can be internal communication of two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0058] Please refer to Figure 1 (arrow in the figure represents the method of signal and energy transmission) and Figure 2 The present application 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 with the monitoring system;

[0059] The energy storage power supply system comprises a lithium battery module 1, a first hardware switch module 2, a bidirectional converter and a second hardware switch module 5 connected in sequence through a pluggable interface; the energy storage power supply system is connected with an external governance target 7 through the second hardware switch module 5; the bidirectional converter is used to realize the bidirectional flow of energy between the lithium battery module 1 and the external governance target 7;

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

[0061] The signal acquisition module 8 is used to acquire the lithium battery voltage of the lithium battery module 1, the running data of the external governance target 7 and the running data of the bidirectional converter, and upload the acquired data to the charge-discharge control module 9;

[0062] The charge-discharge control module 9 is used to receive and judge the acquired data of the signal acquisition module 8; generate a charge-discharge control signal according to the preset governance demand and the acquired data, and send the charge-discharge control signal to the energy storage power supply system, so that the energy storage power supply system provides charge-discharge service to the external governance target 7; during the charge-discharge process, if the acquired data triggers an abnormal protection mechanism, a driving abnormal signal is generated and sent to the energy storage power supply system, so that the energy storage power supply system is switched to a standby state, and the charge-discharge control signal, the driving abnormal signal and the acquired data are uploaded to the display panel 10;

[0063] The display panel 10 is used to receive the driving abnormal signal, the charge-discharge control signal and the acquired data and display the corresponding display data.

[0064] In the present application, the external management target 7 mainly refers to the commercial power or the load. When the external management target 7 is the commercial power, the mobile energy storage power supply can provide the grid-connected power management function for the commercial power. When the external management target 7 is the load, the mobile energy storage power supply can provide the emergency power generation function for the load. The mobile energy storage power supply provided in the embodiment has the power quality management and emergency power generation functions, and has the flexible expansion capability.

[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 provided with plug-in interfaces. In order to improve the service life of the mobile energy storage power supply, different connection modes can be adopted between different components according to different power requirements. The modules of the energy storage power supply system are connected through the high-power quick plug-in interface with large current, so that the quick assembly and disassembly and the capacity and power expansion can be realized. The signal acquisition module 8, the charge and discharge control module 9 and the display panel 10 in the monitoring system can be connected through the low-power flat cable with small current, so that the power requirement can be met and the layout of the line can be optimized.

[0066] In the embodiment, the mobile energy storage power supply adopts the modular structure design. The first hardware switch module 2 is connected with the lithium battery module 1 and the bidirectional converter respectively, and the second hardware switch module 5 is connected with the commercial power or the load. The signal acquisition module 8 acquires the voltage, current and other key parameters of the lithium battery, the commercial power or the load in real time, and transmits the acquired 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 according to the acquisition data, and drives the display panel 10 to directly display the running state. The modular design of the embodiment greatly improves the convenience of use and maintenance of the mobile energy storage power supply. In the actual use process, the capacity and power of the energy storage power supply system can be quickly expanded by adding or reducing the modules with the same function, that is, a plurality of lithium battery modules 1 with the same parameters are connected in parallel to the mobile energy storage power supply system to expand the battery capacity and reduce the capacity parameter design cost. The output interfaces of the plurality of modules are connected in parallel to realize the expansion of the power of the entire system. The present application provides an efficient and customizable solution for the mobile energy storage power supply in the field operation, emergency support and intelligent microgrid scenarios.

[0067] In a specific embodiment, please refer to 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 thereof is connected to the mains or load through the relay RY1, for filtering and cooperating with the bidirectional DC / AC converter 4 to complete the conversion between AC and DC.

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

[0076] In the specific embodiment, as shown in Figure 3 , the first end of the first hardware switch module 2 is connected to the lithium battery module 1, and the second end thereof is connected to the low-voltage side of the bidirectional converter, and 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 thereof is connected to the mains or external load through the 220V AC bidirectional interface 6 (i.e., the external interface), and the relays RY1, RY2 and RY4 of the second hardware switch module 5 connect the bidirectional converter to the mains or load, so as to realize the bidirectional conversion from DC to AC, and make the electric energy flow bidirectionally in the entire energy storage power supply system.

[0077] The present application can realize the control switching of different governing states by the cooperation of different relays, so that the mobile energy storage power supply has the functions of emergency power generation and power quality management, etc. The relays are designed on separate PCB plates, and the copper area is increased to realize the high-power operating state with a maximum current of 10A.

[0078] In the specific embodiment, as shown in 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 for acquiring the voltage of the lithium battery 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 governing target 7; the current signal acquisition circuit is used for acquiring the current of the lithium battery module 1 and the current of the external governing target 7; and the temperature acquisition circuit is used for acquiring the operating temperature of the bidirectional DC / DC converter 3 and the bidirectional DC / AC converter 4.

[0079] Each component circuit in the signal acquisition module 8 acquires the key parameter information such as the voltage and current of the lithium battery module 1, the high-voltage stabilizing capacitor C2, the mains and external load, and the temperature of the bidirectional converter switching tube in the operating process in real time, and transmits the information to the charge-discharge control module 9 for further processing and judgment, so as to monitor and control the entire energy storage power supply system.

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

[0081] The DC / DC control processor receives and detects the current and voltage of the lithium battery module 1, the voltage of the low-voltage stabilizing capacitor C1, and whether the operating temperature of the bidirectional DC / DC converter 3 triggers an abnormal protection mechanism, and generates a driving abnormality signal if triggered. The DC / AC control processor receives and detects the voltage of the high-voltage stabilizing capacitor C2, the current and voltage of the external management target 7, and whether the operating temperature of the bidirectional DC / AC converter 4 triggers an abnormal protection mechanism, and generates a driving abnormality signal if triggered.

[0082] The DC / DC control processor and the DC / AC control processor are in communication connection, and are used to generate a charge and discharge control signal of the commercial power according to the current and voltage of the lithium battery module 1 and the current and voltage of the commercial power if the preset management requirement is associated with the commercial power; generate a charge control signal of the load according to the current and voltage of the lithium battery module 1 and the current and voltage of the load if the preset management requirement is associated with the load; and send a fault signal to the other control processor when a certain control processor fails, so that the other control processor generates a driving 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 high-voltage stabilizing capacitor C2, and the temperature parameters of the switching tube of the bidirectional DC / DC converter 3 transmitted by the signal acquisition module 8, controls the operation of the DC / DC side by sending control signals to the related switching components on the DC / DC side, and judges whether overvoltage, overcurrent, or temperature overlimiting and the like occurs on the DC / DC side.

[0084] The DC / AC control processor receives and processes the voltage and current of the commercial power or external load, the voltage of the high-voltage stabilizing capacitor, and the temperature parameters of the switching tube of the bidirectional DC / AC converter transmitted by the signal acquisition module 8, such as phase locking to the commercial power voltage, controls the operation of the DC / AC side by sending control signals to the related switching components on the DC / AC side, and judges whether overvoltage, overcurrent, or temperature overlimiting and the like occurs on the DC / AC side.

[0085] The power management efficiency of the mobile energy storage power supply can be effectively improved through the cooperative processing of the DC / DC control processor and the DC / AC control processor. When the external grid connection demand is detected, the charge and discharge control module 9 intelligently controls the switching of the charge and discharge mode of the energy storage power supply system to realize the voltage management function in combination with the state of the mobile energy storage power supply (remaining power, whether to enter the voltage management mode) and the state of the mains voltage. When the external connection of the AC load demand is detected, the charge and discharge control module 9 intelligently controls the discharging process of the energy storage power supply system to realize the emergency power supply function in combination with the state of the energy storage power supply and the operating state of the external load. At the same time, the charge and discharge control module 9 also drives the display panel 10 to directly display various operating state parameters of the energy storage power supply, thereby improving the convenience and practicality of the energy storage power supply in actual use scenarios.

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

[0087] According to actual needs, the display panel 10 can also display the remaining power percentage of the lithium battery, the mains or external load side voltage, and the charge and discharge power of the mobile energy storage power supply, etc.

[0088] In a specific embodiment, the first hardware switch module 2 specifically adopts a relay with a conduction voltage of 12V, and the second hardware switch module 5 specifically adopts a relay with a conduction voltage of 5V. It should be noted that the capacity of the lithium battery module 1 adopted in this embodiment is 1-2kW·h, and the nominal voltage is 48-60V. In order to adapt to voltage driving, the first hardware switch module 2 further includes a 48V-12V voltage converter and a switch button, so as to convert the direct current voltage (such as 48V) output by the lithium battery module 1 into a low voltage driving voltage (12V) that meets the requirements to drive the relay.

[0089] Further, the mobile energy storage power supply is also provided with a 12V output interface at the first hardware switch module 2, which can be connected to the interface integrated module 11 with a 12V-5V power module and USB, Type-C interface, so that the internal 5V voltage source of the mobile energy storage power supply can be realized to supply power to the display panel 10 and other components, and supply power to the outside through the USB, Type-C interface. Similarly, the interface integrated module 11 with a 12V-5V power module and USB, Type-C interface also adopts an interface module design, which can realize quick connection and replacement.

[0090] The multifunctional modular mobile energy storage power supply provided by the embodiment greatly improves the convenience of use and maintenance of the energy storage power supply. By adding or removing the same functional modules, the system capacity and power can be quickly expanded. The lithium battery module 1, the hardware switch module, the bidirectional converter and the charge and discharge control module 9 are connected to the remaining modules through a pluggable interface, so that the assembly and disassembly of the mobile energy storage power supply can be quickly realized, thereby greatly improving the convenience of the energy storage power supply in use and maintenance. By optimizing the size and modular assembly of each part of the energy storage power supply, the space occupation is reduced to facilitate transportation and carrying. With the design of the hardware switch module and the bidirectional converter, the present application can be more flexible and convenient to participate in the power quality management of the mains and the emergency power supply of the external load, thereby providing an efficient and customizable solution for the mobile energy storage power supply in the field operation, emergency support and intelligent microgrid scenarios.

[0091] Please refer to Figure 4 The present application also provides an electric energy management method for a multifunctional modular mobile energy storage power supply. The method involves the multifunctional modular mobile energy storage power supply as described above, and the method comprises the following steps:

[0092] In step 101, the management demand is obtained, the running parameters are initialized according to the management demand, and the corresponding management mode is entered.

[0093] It should be noted that the management demand can be the management demand of the power grid mains or the management demand of the power grid load. In view of the fact that the existing mobile energy storage power supply lacks power quality management function and cannot participate in the management of the power quality of the power grid, the present application designs a mobile energy storage power supply by optimizing the hardware and integrating the mains management and emergency power generation management principles.

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

[0095] Step 102, if the governance requirement is associated with the commercial power, call the mobile energy storage power to access the commercial power and enter the power quality governance mode, detect the operation data of the mobile energy storage power and the operation data of the commercial power, and perform the power quality governance operation strategy according to the detection result.

[0096] It should be noted that the operation data of the mobile energy storage power can include the current 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, etc. The operation data of the commercial power can include the commercial power voltage and the commercial power current, etc. In the power quality governance mode, if the commercial power fluctuates, the voltage of the commercial power can be detected and adjusted in real time by the mobile energy storage power to perform the commercial power governance, thereby ensuring the operation stability and reliability of the commercial power.

[0097] This step specifically includes:

[0098] Step S10, if the governance requirement is associated with the commercial power, call the mobile energy storage power to access the commercial power and enter the power quality governance mode.

[0099] Step S11, if the grid-connected operation mode signal is received, perform amplitude and phase angle tracking on the commercial power.

[0100] It can be understood that after entering the power quality governance mode, if the grid-connected operation mode signal is received, the commercial power needs to be processed in the grid-connected mode, such as amplitude and phase angle tracking. Before performing amplitude and phase angle tracking on the commercial power, it is also necessary to determine whether the mobile energy storage power is connected to the commercial power and whether the operation parameters are initialized. In the grid-connected operation mode, the parameter variables in the operation parameters can include: lithium battery voltage, remaining power, voltage amplitude, frequency and phase angle of the external interface, etc.

[0101] Step S12, detect whether the lithium battery voltage is normal, if the lithium battery voltage is abnormal, generate abnormal information of the lithium battery voltage, and control the mobile energy storage power to enter the standby mode.

[0102] Please refer to Figure 3 In the standby mode, the relay RY3 and the relay RY5 of the mobile energy storage power are closed, and the relay RY1, the relay RY2 and the relay RY4 are disconnected, so as to ensure that the battery energy of the mobile energy storage power will not be leaked to ensure the safety of the power governance, and at the same time keep the mobile energy storage power ready to be put into governance at any time.

[0103] Step S13, if the lithium battery voltage is normal, determine the commercial power voltage according to the collected amplitude and phase angle of the commercial power, and judge whether the commercial power voltage is normal.

[0104] It should be noted that, after the voltage of the commercial power is determined according to the amplitude and phase angle of the collected commercial power, whether the commercial power voltage is normal is determined according to the preset voltage range; in the normal operation state, the voltage amplitude of the commercial power is in a certain range interval. If the amplitude of the commercial power voltage is within the preset voltage range, it is determined that the commercial power is in a normal state; otherwise, it is considered that the commercial power is in an abnormal state.

[0105] Step S14, if the commercial power voltage is abnormal, the mobile energy storage power supply is called to enter the charging and discharging operation according to the abnormal state of the commercial power voltage.

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

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

[0108] In this embodiment, the condition of triggering the abnormal protection mechanism can be triggering the overvoltage, overcurrent, overtemperature or undervoltage protection mechanism; if the collection 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 trigger the abnormal protection mechanism, the electric energy management process needs to be stopped immediately, that is, the energy exchange between the mobile energy storage power supply and the commercial power is stopped, and the corresponding fault abnormal information is displayed through the state indicating lamp, so that the operator can judge whether to completely exit the electric energy management.

[0109] Further, if the commercial power voltage is abnormal, the mobile energy storage power supply is called to enter the charging and discharging operation according to the abnormal state of the commercial power voltage. The process specifically includes:

[0110] Step S20, when the amplitude of the commercial power voltage is lower than the set minimum value, the mobile energy storage power supply is called to output power to the commercial power for discharging.

[0111] In the normal operation state, the voltage amplitude of the commercial power is within the preset voltage range, if the amplitude of the commercial power voltage is lower than the set minimum value within the preset voltage range, it indicates that the commercial power has insufficient power supply or low voltage, at this time, the mobile energy storage power supply can be called to output power to the commercial power for discharging to ensure the normal operation of the commercial power.

[0112] In the embodiment, when the amplitude of the mains voltage is lower than the set minimum value, the working process of the mobile energy storage power supply includes: when the amplitude of the mains voltage is lower than the set minimum value, the energy storage power supply system is switched to the grid-connected discharging state by the charge-discharge control module; the relay RY1 of the bidirectional full-bridge DC / AC converter is closed, and the bidirectional full-bridge DC / DC converter is controlled 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 at the high-voltage stabilizing capacitor C2 corresponds to the bus voltage;

[0113] When it is detected that the voltage at the high-voltage stabilizing capacitor C2 is lifted to 400V, the bidirectional full-bridge DC / AC converter is controlled to work in the grid-connected discharging state; the direct-current voltage of the lithium battery module is converted into alternating-current voltage by the bidirectional full-bridge DC / AC converter and is delivered to the mains in the grid-connected manner. At this time, the output voltage and the output current of the mobile energy storage power supply are in the nearly anti-phase state.

[0114] Step S21, when the amplitude of the mains voltage 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 amplitude of the mains voltage is higher than the set maximum value in 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 to store energy to ensure the normal operation of the mains.

[0116] In the embodiment, when the amplitude of the mains voltage is higher than the set maximum value, the working process of the mobile energy storage power supply includes: when the amplitude of the mains voltage is higher than the set maximum value, the energy storage power supply system is switched to the grid-connected charging state by the charge-discharge control module; in the energy storage power supply system, the relay RY2 and the relay RY4 of the bidirectional full-bridge DC / AC converter are closed, the alternating-current voltage output by the mains is converted into direct-current voltage by the rectification full-bridge UR of the bidirectional full-bridge DC / AC converter, and the energy of the direct-current voltage is delivered to the high-voltage stabilizing capacitor C2;

[0117] When it is detected that the voltage at the high-voltage stabilizing capacitor C2 is lifted to 300V, the relay RY2 and the relay RY4 are disconnected, and the relay RY1 is closed, the voltage at the high-voltage stabilizing capacitor C2 is lifted to 400V by controlling the bidirectional full-bridge DC / AC converter, at this time, the bidirectional full-bridge DC / AC converter works in the grid-connected charging state, and the bidirectional full-bridge DC / DC converter works in the forward working state, so that the power output by the mains is to the bidirectional full-bridge DC / AC converter, the energy output by the mains is converted into direct-current voltage by the bidirectional full-bridge DC / AC converter, and the direct-current voltage is delivered to the lithium battery through the bidirectional full-bridge DC / DC converter, thereby realizing charging of the mobile energy storage power supply by the mains, at this time, the output voltage and the output current of the mobile energy storage power supply are in the nearly same phase state.

[0118] Step S22, when the commercial power is restored to normal and the power transmission between the mobile energy storage power supply and the commercial power is detected to drop to zero, the mobile energy storage power supply is controlled to enter the standby mode.

[0119] It can be understood that if there is no abnormal situation in the power management process, the mobile energy storage power supply can be controlled to enter the standby mode to wait for the next round of power management work after the mobile energy storage power supply and the commercial power complete the entire grid-connected power quality 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 perform power supply storage, after the power supply storage is completed, call the mobile energy storage power supply to access the load and supply power to the load; detect the operation data of the mobile energy storage power supply and the operation data of the load during the power supply process, and execute the load management operation strategy according to the detection result.

[0121] It should be noted that the operation data of the mobile energy storage power supply can include 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 operation data of the load can include load voltage and load current; in the emergency power generation mode, the voltage of the load can be detected in real time by the mobile energy storage power supply to supply power to the load, thereby providing stable power support for the key load.

[0122] This step specifically includes:

[0123] Step S30, if the management demand is associated with the load, enter the emergency power generation mode, control the mobile energy storage power supply to perform power supply storage, after the power supply storage is completed, call the mobile energy storage power supply to access the load and supply power to the load.

[0124] It should be noted that in the case of power failure or emergency rescue, the mobile energy storage power supply can quickly respond and switch to the emergency power generation mode to provide stable power support for the key load.

[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 energy storage power supply system is switched to the emergency power generation state by the charge and discharge control module; in the energy storage power supply system, the relay RY1 is closed, and the bidirectional full-bridge DC / DC converter is controlled 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 the high-voltage stabilizing capacitor C2 voltage is detected to be lifted to 400V, the bidirectional full-bridge DC / AC converter is controlled to work in an inverter state; the direct-current voltage of the lithium battery module is converted into 220V alternating-current voltage through the bidirectional full-bridge DC / AC converter; the mobile energy storage power supply is connected to the load, and the bidirectional full-bridge DC / AC converter supplies 220V alternating-current voltage to the load.

[0127] For the convenience of understanding, the working states of the bidirectional full-bridge DC / DC converter and the bidirectional full-bridge DC / AC converter are further described as follows:

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

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

[0130] Taking the bidirectional full-bridge DC / DC converter working in the forward working state as an example, the full-bridge diagonal simultaneous switching, non-diagonal staggered switching and forward and reverse conduction are realized by adjusting the frequency of the switching drive signal. Without considering the dead zone, the duty cycle of each switch is 50%. In the positive half cycle of a period, the drive voltages of S5 and S8 are high, both of which are turned on, and the current is transferred from the body diodes of S5 and S8 to the switches of S5 and S8, at this time, the body diodes of S1 and S4 on the left side of the transformer T are turned on to charge the lithium battery module; due to the structural characteristics of the circuit, the current on the body diodes of S1 and S4 will first increase and then gradually decrease, when the drive voltages of S5 and S8 become low, both of which are turned off, the current is transferred from the switches of S6 and S7 to the body diodes of S5 and S8. In the negative half cycle, the drive voltages of S6 and S7 are high, both of which are turned on, and the current is transferred from the body diodes of S6 and S7 to the switches of S6 and S7, 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 structural characteristics of the circuit, the current on the body diodes of S2 and S3 will first increase and then gradually decrease, when the drive voltages of S6 and S7 become low, both of which are turned off, the current is transferred from the switches of S6 and S7 to the body diodes of S5 and S8 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 a cycle, the switch tube S9 and the switch tube S12 are turned on, the switch tube S10 and the switch tube S11 are turned off, at this time, the transmission direction of the current is the outside interface, the switch tube S9, the high-voltage stabilizing capacitor C2, the bidirectional full-bridge DC / DC converter, the switch tube S12, the filter inductor L1 and the relay RY1 in turn; in the second half cycle, the switch tube S10 and the switch tube S11 are turned on, the switch tube S9 and the switch tube S12 are turned off, at this time, the transmission direction of the current is the outside interface, the relay RY1, the filter inductor L1, the switch tube S11, the high-voltage stabilizing capacitor C2 and the bidirectional full-bridge DC / DC converter and the switch tube S10 in turn.

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

[0134] In step S31, in the process of supplying power to the load, if it is detected that 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 the standby mode; if the abnormal protection mechanism is triggered, the driving abnormal 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 electric energy treatment process needs to be stopped immediately, that is, the energy exchange between the mobile energy storage power supply and the load is stopped, and the fault information is displayed through the state indicating lamp, and whether the electric energy treatment is completely exited is judged by the operator.

[0136] In step S32, when the exit signal is received, the mobile energy storage power supply stops supplying power to the load, and the mobile energy storage power supply enters the standby mode.

[0137] It can be understood that if there is no abnormal condition in the electric energy treatment process, the mobile energy storage power supply can be controlled to enter the standby mode to wait for the next round of electric energy treatment after the mobile energy storage power supply and the load complete the entire grid-connected electric energy quality treatment work.

[0138] The treatment method of the multifunctional emergency mobile energy storage power supply has the following advantages:

[0139] 1. According to different power grid application scenarios, the application triggers different power management modes, such as power quality management mode and emergency power generation mode, to meet diversified power demand. When the mains power fluctuates, the mobile energy storage power supply performs mains power management 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 case of power failure or emergency rescue, the mobile energy storage power supply quickly responds to provide stable power support for critical loads.

[0140] 2. Considering that existing mobile energy storage power supplies lack corresponding functions in emergency support and mains power quality management scenarios, the mobile energy storage power supply provided by the application makes optimization and improvement in hardware, effectively expanding the working mode of the mobile energy storage power supply, and at the same time has the performance of large capacity, high power and portability, so that the mobile energy storage power supply can realize flexible and efficient work in outdoor operation, emergency power supply and smart microgrid scenarios.

[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 displayed as units may or may not be physical units, i.e. may be located in one place, or may be distributed on multiple network units. Part or all of the units can be selected according to actual needs to achieve the purpose of the embodiment scheme.

[0144] In addition, each functional unit in each embodiment of the application can be integrated in one processing unit, or each unit can be physically present alone, or two or more units can be integrated in one unit. The integrated unit can be realized in the form of hardware or in the form of a software functional unit.

[0145] The integrated unit, if realized in the form of a software functional unit and sold or used as an independent product, can be stored in a computer readable storage medium. Based on this understanding, the technical solutions of the application, essentially or the part that contributes to the prior art, or all or part of the technical solutions can be embodied in the form of a software product. The computer software product is stored in a storage medium, including a plurality of instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the method described in each embodiment of the application. The foregoing storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM, Read-Only Memory), a random access memory (RAM, Random Access Memory), a magnetic disk or an optical disk, and various program code storage media.

[0146] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the above embodiments are only used to illustrate the technical solutions of the application, but not to limit them; although the application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of each embodiment of the application.

Claims

1. A multi-functional modular mobile energy storage power supply, characterized in that, The energy storage power supply system and a monitoring system; the energy storage power supply system is electrically connected with 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 through a pluggable interface in sequence; the energy storage power supply system is connected with an external management target through the second hardware switch module; the bidirectional converter is used for realizing the energy bidirectional flow between the lithium battery module and the external management target; The monitoring system includes a signal acquisition module, a charge-discharge control module and a display panel connected in sequence; The signal acquisition module is used for acquiring the lithium battery voltage of the lithium battery module, the running data of the external management target and the running data of the bidirectional converter and uploading the acquired data to the charge-discharge control module; The charge-discharge control module is used for receiving and judging the acquired data of the signal acquisition module; According to the preset management requirement and the acquired data, a charge-discharge control signal is generated, and the charge-discharge control signal is sent to the energy storage power supply system, so that the energy storage power supply system provides charge-discharge service to the external management target; In the charge-discharge process, if the acquired data triggers an abnormal protection mechanism, a driving abnormal signal is generated and sent to the energy storage power supply system, so that the energy storage power supply system is controlled to switch to a standby state, and the charge-discharge control signal, the driving abnormal signal and the acquired data are uploaded to the display panel; The display panel is used for receiving the driving abnormal signal, the charge-discharge control signal and the acquired data and displaying corresponding display data; 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 with the first hardware switch module and is used for stabilizing the direct current voltage output by the lithium battery module on the low-voltage side; The bidirectional DC / DC converter is used for bidirectional step-up / down conversion of the direct current voltage; The high-voltage stabilizing capacitor is used for stabilizing the 400V bus voltage on the direct current high-voltage side; The bidirectional DC / AC converter is used for bidirectional conversion of the direct current voltage and the alternating current voltage, so as to realize the bidirectional flow of energy; The filter inductor is connected with the second hardware switch module and is used for filtering the output voltage of the bidirectional DC / AC converter or the output voltage of the external management target; 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 for acquiring the lithium battery voltage 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 management target; The current signal acquisition circuit is used for acquiring the current of the lithium battery module and the current of the external management target; The temperature acquisition circuit is used for acquiring the running temperature of the bidirectional DC / DC converter and the bidirectional DC / AC converter; ​ The external governance target is specifically a commercial power or a load; and the charge-discharge control module comprises a DC / DC control processor and a DC / AC control processor. The DC / DC control processor is configured to receive and detect the current voltage of the lithium battery module, the voltage of the low-voltage stabilizing capacitor, and whether the operating temperature of the bidirectional DC / DC converter triggers an abnormal protection mechanism, and generate a driving abnormality signal if the abnormal protection mechanism is triggered; and the DC / AC control processor is configured to receive and detect the voltage of the high-voltage stabilizing capacitor, the current voltage of the external governance target, and whether the operating temperature of the bidirectional DC / AC converter triggers an abnormal protection mechanism, and generate a driving abnormality signal if the abnormal protection mechanism is triggered. The DC / DC control processor and the DC / AC control processor are in communication connection, and are configured to generate a charge-discharge control signal of the commercial power according to the current voltage of the lithium battery module and the current voltage of the commercial power if the preset governance requirement is associated with the commercial power, generate a charge control signal of the load according to the current voltage of the lithium battery module and the current voltage of the load if the preset governance requirement is associated with the load, and send a fault signal to the other control processor when a fault occurs in a certain control processor, so that the other control processor generates a driving abnormality signal.

2. The multifunctional modular mobile energy storage power supply according to claim 1, characterized in that The first hardware switch module comprises two parallel-connected relays, and is configured to control the on-off state of the low-voltage side of the bidirectional converter according to the driving abnormality signal or the charge-discharge control signal. The second hardware switch module comprises three relays, and is configured to control the on-off state of the high-voltage side of the bidirectional converter according to the driving abnormality signal or the charge-discharge control signal.

3. The multi-functional modular mobile energy storage power source of claim 1, wherein, The display panel is provided with control keys, a DC / DC side operating state indicator lamp, and a DC / AC side operating indicator lamp.

4. The multi-functional modular mobile energy storage power source of claim 2, wherein, 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.

5. A method for power management of a multi-functional modular mobile energy storage power supply, characterized in that, The method involves the multifunctional modular mobile energy storage power supply according to any one of claims 1-4, and the method comprises: obtaining a governance requirement, initializing operating parameters according to the governance requirement, and entering a corresponding governance mode; if the governance requirement is associated with a commercial power, calling the mobile energy storage power supply to access the commercial power and enter an electric energy quality governance mode, detecting the operating data of the mobile energy storage power supply and the operating data of the commercial power, and performing an electric energy quality governance operation strategy on the commercial power according to the detection results; if the governance requirement is associated with a load, entering an emergency power generation mode, controlling the mobile energy storage power supply to perform power supply and energy storage, calling the mobile energy storage power supply to access the load and supply power to the load after the power supply and energy storage is completed, detecting the operating data of the mobile energy storage power supply and the operating data of the load during the power supply process, and performing a load governance operation strategy according to the detection results.

6. The method of claim 5, wherein, If the governance requirement is associated with the city power, the mobile energy storage power supply is called to access the city power and enter the power quality governance mode, the operation data of the mobile energy storage power supply and the operation data of the city power are detected, and the steps of the power quality governance operation strategy according to the detection result are performed, including: If the governance requirement is associated with the city power, the mobile energy storage power supply is called to access the city power and enter the power quality governance mode; If the grid-connected operation mode signal is received, the amplitude and phase angle of the city power are tracked; If the lithium battery voltage is abnormal, the 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 lithium battery voltage is normal, the city power voltage is determined according to the collected amplitude and phase angle of the city power, and whether the city power voltage is normal is judged; If the city power voltage is abnormal, the mobile energy storage power supply is called to perform charging and discharging operation on the city power according to the abnormal state of the city power voltage; If the abnormal protection mechanism is triggered during the charging and discharging process, the driving abnormal signal is generated according to the triggered abnormal protection mechanism, and the mobile energy storage power supply is controlled to enter the standby mode.

7. The method of claim 5, wherein, If the governance requirement is associated with the load, the emergency power generation mode is entered, the mobile energy storage power supply is controlled to perform power supply and energy storage, and after the power supply and energy storage is ended, the mobile energy storage power supply is called to access the load and supply power to the load; The operation data of the mobile energy storage power supply and the operation data of the load are detected during the power supply process, and the steps of the load governance operation strategy according to the detection result are performed, including: If the governance requirement is associated with the load, the emergency power generation mode is entered, the mobile energy storage power supply is controlled to perform power supply and energy storage, and after the power supply and energy storage is ended, the mobile energy storage power supply is called to access the load and supply power to the load; If the lithium battery voltage is abnormal during the power supply process to the load, the 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, the driving abnormal 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 stops supplying power to the load, and the mobile energy storage power supply is controlled to enter the standby mode.

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