Energy storage system and outage emergency linkage control method

Abstract

The invention provides an energy storage system and a power-off emergency linkage control method, and relates to the technical field of energy storage systems, the energy storage system comprises an energy storage device, a plurality of intelligent circuit breakers and a plurality of load devices, and each intelligent circuit breaker is connected with at least one load device; the energy storage device determines the power utilization priority sequence of the plurality of load devices based on the obtained power utilization priority sequence information; under the condition that the power grid is powered off, the energy storage equipment obtains historical electricity utilization power information of the load equipment through the intelligent circuit breaker; and on the basis of the power utilization priority sequence, the current maximum output power value of the energy storage equipment and the historical power utilization power information, the multiple intelligent circuit breakers are controlled to be switched off or switched on, so that the energy storage equipment supplies power to at least one of the multiple load equipment through the intelligent circuit breakers. According to the technical scheme, electric energy dispatching during power failure of the power grid can be optimized, the energy storage system can preferentially guarantee operation of important loads under the condition of limited output power, and user experience can be improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of energy storage systems, in particular to an energy storage system and a power-off emergency linkage control method. BACKGROUND

[0002] In a user-oriented small energy storage system (such as a balcony photovoltaic energy storage system), the system usually includes an energy storage host, a battery expansion unit, a power consumption monitoring device and other types of devices, and the devices need to interact with each other to realize core functions such as energy scheduling, state monitoring and safety protection.

[0003] In related technologies, in the case of power grid power failure, the energy storage system cannot guarantee priority power supply to important loads, and the user experience is poor. SUMMARY

[0004] In order to solve or improve the technical problem that in the case of power grid power failure, the energy storage system cannot guarantee priority power supply to important loads, and the user experience is poor, one purpose of the present application is to provide an energy storage system.

[0005] Another purpose of the present application is to provide a power-off emergency linkage control method.

[0006] To achieve the above purpose, the first aspect of the present application provides an energy storage system, comprising an energy storage device, a plurality of intelligent circuit breakers and a plurality of load devices, each intelligent circuit breaker is connected with at least one load device, and the intelligent circuit breaker is connected with the energy storage device and the power grid; in the case where the intelligent circuit breaker is connected with the plurality of load devices, the power consumption priority order of the plurality of load devices connected with the same intelligent circuit breaker is the same; the energy storage device determines the power consumption priority order of the plurality of load devices based on the obtained power consumption priority order information; in the case of power grid power failure, the energy storage device obtains the historical power consumption power information of the load device through the intelligent circuit breaker; based on the power consumption priority order, the current maximum output power value of the energy storage device and the historical power consumption power information, the plurality of intelligent circuit breakers are controlled to be opened or closed, so that the energy storage device supplies power to at least one of the plurality of load devices through the intelligent circuit breaker.

[0007] The present application aims to provide an energy storage system, and the energy storage device divides the load levels (power consumption priority order) of the plurality of load devices according to the obtained power consumption priority order information; in the case of power grid power failure, based on the power consumption priority order, the current maximum output power value and the historical power consumption power information, the plurality of intelligent circuit breakers are controlled to be opened or closed, so as to ensure priority power supply to the load devices with higher power consumption priority order. This design can optimize the power scheduling in the case of power grid power failure, so that the energy storage system can prioritize important loads in the case of limited output power, which is beneficial to improve the user experience.

[0008] In some embodiments, the energy storage device determines, according to the power consumption priority order information, a first-level load, a second-level load and a third-level load among the plurality of load devices; the power consumption priority order of the first-level load is higher than that of the second-level load, and the power consumption priority order of the second-level load is higher than that of the third-level load; and the energy storage device controls the plurality of intelligent circuit breakers to be opened or closed based on the power consumption priority order, the current maximum output power value and the historical power consumption information, so that the energy storage device supplies power to the first-level load, the second-level load and the third-level load, or to the first-level load and the second-level load, or to the first-level load.

[0009] In this embodiment, by classifying the load levels of the plurality of load devices, the energy storage device can accurately identify high-priority loads after the power grid is powered off, and preferentially ensure continuous power supply to the first-level load, effectively solving the problem of unordered power supply and important device shutdown after power failure in the prior art, and improving user experience.

[0010] Based on the dynamic matching of the historical power consumption information and the current maximum output power, the energy storage device can accurately determine the feasibility of supplying power to the load devices of each power consumption priority order, avoid power waste caused by blindly connecting low-priority and high-power-consumption load devices, and preferentially ensure the operation of important loads under the limited output power of the energy storage device, thereby prolonging the power supply time for important loads.

[0011] In some embodiments, the energy storage device calculates, based on the historical power consumption information, a first total power consumption value of the first-level load, a second total power consumption value of the second-level load and a third total power consumption value of the third-level load; and controls the plurality of intelligent circuit breakers to be opened or closed based on the power consumption priority order, the current maximum output power value, the first total power consumption value, the second total power consumption value and the third total power consumption value, so that the energy storage device supplies power to the first-level load, the second-level load and the third-level load, or to the first-level load and the second-level load, or to the first-level load.

[0012] In this embodiment, the energy storage device continuously collects and updates the historical power consumption data of the load devices, and can dynamically adapt to scenarios such as addition or deletion of load devices and power changes. Based on the dynamic matching of the historical power consumption information and the current maximum output power, the energy storage device can accurately determine the feasibility of supplying power to the load devices of each power consumption priority order, avoid power waste caused by blindly connecting low-priority and high-power-consumption load devices, and preferentially ensure the operation of important loads under the limited output power of the energy storage device, thereby prolonging the power supply time for important loads.

[0013] In some embodiments, when the current maximum output power value is greater than or equal to the sum of the first total power consumption value, the second total power consumption value, the third total power consumption value, and the safety factor, the energy storage device controls all the intelligent circuit breakers to be closed, so that the energy storage device supplies power to the primary load, the secondary load, and the tertiary load; when the current maximum output power value is less than the sum of the first total power consumption value, the second total power consumption value, the third total power consumption value, and the safety factor, and greater than or equal to the sum of the first total power consumption value, the second total power consumption value, and the safety factor, the energy storage device controls the intelligent circuit breaker connected to the tertiary load to be opened, so that the energy storage device supplies power to the primary load and the secondary load; when the current maximum output power value is less than the sum of the first total power consumption value, the second total power consumption value, and the safety factor, and greater than or equal to the sum of the first total power consumption value and the safety factor, the energy storage device controls the intelligent circuit breaker connected to the tertiary load to be opened, and controls the intelligent circuit breaker connected to the secondary load to be opened, so that the energy storage device supplies power to the primary load.

[0014] In this embodiment, the energy storage device can accurately determine the feasibility of supplying power to the load devices of each power consumption priority order, avoid power waste caused by blindly connecting low-priority and high-power-consumption load devices, and preferentially ensure the operation of important loads under limited output power, thereby prolonging the power supply time for important loads.

[0015] By setting the safety factor, sufficient power redundancy buffer is provided for the power supply process, and risks such as voltage instability and device overload caused by factors such as load startup impact and instantaneous power peak are effectively avoided, thereby preventing important loads from being damaged or shut down due to abnormal power supply.

[0016] In some embodiments, when the current maximum output power value is less than the first total power consumption value, the energy storage device controls all the intelligent circuit breakers to be opened.

[0017] In this embodiment, when the output power of the energy storage device is insufficient to cover the basic power consumption demand of the primary load, forced power supply will cause the energy storage device to be in an overloaded state for a long time, causing faults such as excessive discharge of the battery module and overheating of the inverter, and even damaging the load device. By stopping power supply to all load devices, the safety performance is improved, and the equipment maintenance and replacement cost is reduced.

[0018] In some embodiments, the energy storage device and the intelligent circuit breaker are communicatively connected through power carrier communication; and / or the energy storage device and the intelligent circuit breaker are communicatively connected through wireless communication.

[0019] In the technical scheme, power carrier communication and / or wireless communication are adopted between the energy storage device and the intelligent circuit breaker, both of which do not need to arrange traditional CAN (Controller Area Network) communication lines, which is beneficial to reduce wiring cost and workload, and can improve the accuracy of data acquisition results, thereby providing strong data support for data analysis.

[0020] In some technical schemes, the energy storage device comprises an energy storage converter, an EMS module, a BMS module and a battery module; the BMS module is electrically connected with the battery module, and the BMS module is electrically connected with the energy storage converter; the EMS module is electrically connected with the BMS module, and the EMS module is electrically connected with the energy storage converter; the EMS module is in communication connection with the intelligent circuit breaker; and the energy storage converter is used to connect the photovoltaic panel and the power grid.

[0021] It should be noted that BMS (Battery Management System) refers to a battery management system, and EMS (Energy Management System) refers to an energy management system.

[0022] In the technical scheme, the BMS module monitors the operating parameters of the battery module in real time, effectively avoids the risks of overcharging, overdischarging and overheating of the battery module, delays the aging speed of the battery cell, and guarantees the long-term stable operation of the battery module. Through the cooperative control of the BMS module, the EMS module and the energy storage converter, the charging and discharging process of the battery module is always in the optimal working condition, which is beneficial to prolong the service life of the battery module.

[0023] In some technical schemes, the energy storage device further comprises a first PLC module, the intelligent circuit breaker comprises a second PLC module, and the first PLC module is in communication connection with the second PLC module.

[0024] It should be noted that PLC (Power Line Communication) refers to power line communication, also known as power carrier communication.

[0025] In the technical scheme, the energy storage device is in communication connection with each intelligent circuit breaker through the integrated PLC module. Since the energy storage device and the intelligent circuit breaker can realize power carrier communication through the existing power line, it is not necessary to arrange traditional CAN communication lines, which is beneficial to reduce wiring cost and workload.

[0026] The second aspect of the present application provides an emergency power-off linkage control method for the energy storage device of the energy storage system in any of the above technical solutions, the emergency power-off linkage control method comprising: determining the power consumption priority order of the plurality of load devices based on the obtained power consumption priority order information; in the case of power grid outage, obtaining the historical power consumption power information of the load devices through the intelligent circuit breaker; based on the power consumption priority order, the current maximum output power value of the energy storage device and the historical power consumption power information, controlling the plurality of intelligent circuit breakers to open or close, so that the energy storage device supplies power to at least one of the plurality of load devices through the intelligent circuit breaker.

[0027] The present application aims to provide an emergency power-off linkage control method, the energy storage device divides the load levels (power consumption priority order) of the plurality of load devices according to the obtained power consumption priority order information; in the case of power grid outage, based on the power consumption priority order, the current maximum output power value and the historical power consumption power information, control the plurality of intelligent circuit breakers to open or close, to ensure that the load devices with higher power consumption priority order are supplied with power first. This design can optimize the power scheduling when the power grid is out of power, and ensure the operation of important loads under the condition of limited output power of the energy storage system, which is beneficial to improve the user experience.

[0028] In some technical solutions, optionally, determining the power consumption priority order of the plurality of load devices based on the obtained power consumption priority order information comprises: determining the first-level load, the second-level load and the third-level load in the plurality of load devices according to the obtained power consumption priority order information; wherein the power consumption priority order of the first-level load is higher than that of the second-level load, and the power consumption priority order of the second-level load is higher than that of the third-level load; based on the power consumption priority order, the current maximum output power value of the energy storage device and the historical power consumption power information, control the plurality of intelligent circuit breakers to open or close, so that the energy storage device supplies power to at least one of the plurality of load devices through the intelligent circuit breaker, comprising: based on the power consumption priority order, the current maximum output power value and the historical power consumption power information, control the plurality of intelligent circuit breakers to open or close, so that the energy storage device supplies power to the first-level load, the second-level load and the third-level load, or to the first-level load and the second-level load, or to the first-level load.

[0029] In this technical solution, by dividing the load levels of the plurality of load devices, the energy storage device can accurately identify high-priority loads after the power grid is out of power, and preferentially ensure continuous power supply to the first-level load, effectively solving the problem of unordered power supply and important equipment shutdown after power outage in traditional technology, which is beneficial to improve the user experience.

[0030] Based on the dynamic matching of the historical power consumption information and the current maximum output power, the energy storage device can accurately determine the feasibility of supplying power to the load devices in each power consumption priority order, avoid power waste caused by blindly connecting low-priority and high-power-consumption load devices, and preferentially ensure the operation of important loads under the limited output power of the energy storage device, thereby prolonging the power supply time for important loads.

[0031] In some technical solutions, optionally, after the historical power consumption information of the load devices is obtained by the intelligent circuit breaker in the case of power failure of the power grid, the power failure emergency linkage control method further includes: calculating a first total power consumption value of the primary load, a second total power consumption value of the secondary load, and a third total power consumption value of the tertiary load based on the historical power consumption information; based on the power consumption priority order, the current maximum output power value, and the historical power consumption information, controlling the multiple intelligent circuit breakers to be opened or closed to enable the energy storage device to supply power to the primary load, the secondary load, and the tertiary load, or to supply power to the primary load and the secondary load, or to supply power to the primary load, including: based on the power consumption priority order, the current maximum output power value, the first total power consumption value, the second total power consumption value, and the third total power consumption value, controlling the multiple intelligent circuit breakers to be opened or closed to enable the energy storage device to supply power to the primary load, the secondary load, and the tertiary load, or to supply power to the primary load and the secondary load, or to supply power to the primary load.

[0032] In this technical solution, the energy storage device continuously collects and updates the historical power consumption data of the load devices, which can dynamically adapt to scenarios such as the increase or decrease of load devices and power changes. Based on the dynamic matching of the historical power consumption information and the current maximum output power, the energy storage device can accurately determine the feasibility of supplying power to the load devices in each power consumption priority order, avoid power waste caused by blindly connecting low-priority and high-power-consumption load devices, and preferentially ensure the operation of important loads under the limited output power of the energy storage device, thereby prolonging the power supply time for important loads.

[0033] In some technical solutions, optionally, based on the power consumption priority order, the current maximum output power value, the first total power consumption value, the second total power consumption value and the third total power consumption value, the plurality of intelligent circuit breakers are controlled to be opened or closed to make the energy storage device supply power to the primary load, the secondary load and the tertiary load, or to the primary load and the secondary load, or to the primary load, comprising: in the case that the current maximum output power value is greater than or equal to the sum of the first total power consumption value, the second total power consumption value, the third total power consumption value and the safety factor, all the intelligent circuit breakers are controlled to be closed to make the energy storage device supply power to the primary load, the secondary load and the tertiary load; in the case that the current maximum output power value is less than the sum of the first total power consumption value, the second total power consumption value, the third total power consumption value and the safety factor, and greater than or equal to the sum of the first total power consumption value, the second total power consumption value and the safety factor, the intelligent circuit breaker connected with the tertiary load is controlled to be opened to make the energy storage device supply power to the primary load and the secondary load; in the case that the current maximum output power value is less than the sum of the first total power consumption value, the second total power consumption value and the safety factor, and greater than or equal to the sum of the first total power consumption value and the safety factor, the intelligent circuit breaker connected with the tertiary load is controlled to be opened, and the intelligent circuit breaker connected with the secondary load is controlled to be opened to make the energy storage device supply power to the primary load.

[0034] In this technical solution, the energy storage device can accurately judge the feasibility of supplying power to the load devices of each power consumption priority order, avoid power waste caused by blindly connecting low-priority and high-power-consumption load devices, and preferentially ensure the operation of important loads under the limited output power, thereby prolonging the power supply time of important loads.

[0035] By setting the safety factor, sufficient power redundancy buffer is provided for the power supply process, and risks such as voltage instability and device overload caused by factors such as load starting impact and instantaneous power peak are effectively avoided, and important loads are prevented from being damaged or stopped due to abnormal power supply.

[0036] Additional aspects and advantages of the technical solutions of the present application will become apparent in the description below, or will be appreciated by practice of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0037] Figure 1 A structural block diagram of an energy storage system according to one embodiment of the present application is shown;

[0038] Figure 2 A structural block diagram of an energy storage system according to another embodiment of the present application is shown;

[0039] Figure 3 A flowchart of a power-off emergency linkage control method according to one embodiment of the present application is shown;

[0040] Figure 4 a flow chart of the power-off emergency linkage control method according to an embodiment of the present application is shown; Figure 3 a flow chart of S302 in the method is shown;

[0041] Figure 5 a flow chart of S306 in the method is shown; Figure 3 a flow chart of S306 in the method is shown;

[0042] Figure 6 a flow chart of the power-off emergency linkage control method according to another embodiment of the present application is shown;

[0043] Figure 7 a flow chart of S3062 in the method is shown; Figure 5 a flow chart of S3062 in the method is shown;

[0044] Figure 8 a flow chart of S3063 in the method is shown; Figure 7 a flow chart of S3063 in the method is shown;

[0045] Figure 9 a flow chart of the power-off emergency linkage control method according to another embodiment of the present application is shown.

[0046] wherein, Figures 1 to 9 the correspondence between the reference signs and the component names in the method is as follows:

[0047] 1: energy storage system; 12: energy storage device; 121: energy storage converter; 122: EMS module; 123: BMS module; 124: battery module; 125: first PLC module; 14: intelligent circuit breaker; 142: second PLC module; 16: load device; 161: primary load; 162: secondary load; 163: tertiary load; 21: photovoltaic panel; 22: power grid; 23: electric meter. DETAILED DESCRIPTION

[0048] In order to enable a more clear understanding of the above-mentioned purposes, features and advantages of the embodiments of the present application, the embodiments of the present application are further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0049] In the following description, many specific details are set forth in order to provide a thorough understanding of the present application, however, embodiments of the present application can also be implemented in other ways different from those described herein, therefore, the scope of protection of the present application is not limited to the specific embodiments disclosed below.

[0050] In a user-oriented small energy storage system (for example, a balcony photovoltaic energy storage system), the system usually includes an energy storage host, a battery expansion unit, a power consumption monitoring device and other types of devices. The devices need to interact with each other to realize core functions such as energy scheduling, state monitoring and safety protection, so as to meet the needs of users for distributed energy storage and utilization.

[0051] In the related art, when the power grid is powered off, the energy storage system often lacks a precise identification and dynamic control mechanism for load priority, and it is difficult to allocate differentiated power supply according to the importance of the load, resulting in that important loads cannot be prioritized, which not only affects the basic power demand of users, but also may cause safety hazards or inconvenience due to the shutdown of important equipment, and the overall user experience is poor.

[0052] The present application aims to provide an energy storage system and a power-off emergency linkage control method. The energy storage device divides the load levels (power consumption priority order) of a plurality of load devices according to the power consumption priority order information set by the user in advance. In the case of power grid power failure, based on the power consumption priority order, the current maximum output power value and the historical power consumption power information, the plurality of intelligent circuit breakers are controlled to be opened or closed to ensure that power is supplied to the load devices with higher power consumption priority order. This design can optimize the power scheduling when the power grid is powered off, so that the energy storage system can prioritize the operation of important loads under limited output power, which is conducive to improving the user experience.

[0053] Reference will now be made to Figures 1 to 9 The energy storage system and the power-off emergency linkage control method provided according to some embodiments of the present application are described.

[0054] In one embodiment of the present application, as shown in Figure 1 and Figure 2 , the energy storage system 1 includes an energy storage device 12, a plurality of intelligent circuit breakers 14 and a plurality of load devices 16. Each intelligent circuit breaker 14 is connected to at least one load device 16. The intelligent circuit breaker 14 is used to connect with the energy storage device 12 and the power grid 22.

[0055] In the case where the intelligent circuit breaker 14 is connected to a plurality of load devices 16, the power consumption priority orders of the plurality of load devices 16 connected to the same intelligent circuit breaker 14 are the same.

[0056] The energy storage device 12 determines the power consumption priority order of the plurality of load devices 16 based on the acquired power consumption priority order information; in the case of power failure of the power grid 22, the energy storage device 12 acquires historical power consumption power information of the load devices 16 through the intelligent circuit breaker 14; based on the power consumption priority order, the current maximum output power value of the energy storage device 12 and the historical power consumption power information, the plurality of intelligent circuit breakers 14 are controlled to be opened or closed so that the energy storage device 12 supplies power to at least one of the plurality of load devices 16 through the intelligent circuit breaker 14.

[0057] The energy storage device 12 is an integrated device integrating power storage, photovoltaic access, power scheduling, data interaction and intelligent control. The energy storage device 12 not only can store the power generated by photovoltaic power generation (or the power of the power grid 22 in the low valley period), but also can supply power in cooperation with the power grid 22 in the normal state of the power grid 22, and automatically switch to the "emergency power supply mode" in the power failure state of the power grid 22, and supply power to the designated load through the intelligent circuit breaker 14, which is the core power source and control center for realizing "power failure emergency linkage and priority protection of important loads".

[0058] The intelligent circuit breaker 14 can respond to the query and control instruction of the energy storage device 12, and cooperate with the energy storage device 12 to realize the execution of the load (load device 16) grading strategy.

[0059] The intelligent circuit breaker 14 is electrically connected with the energy storage device 12, that is, the energy storage device 12 can provide power to the load device 16 through the intelligent circuit breaker 14. The energy storage device 12 is in communication connection with the intelligent circuit breaker 14, so that the energy storage device 12 controls the corresponding intelligent circuit breaker 14 to be closed or opened according to the actual demand.

[0060] The intelligent circuit breaker 14 is electrically connected with the power grid 22, that is, the power grid 22 can provide power to the load device 16 through the intelligent circuit breaker 14.

[0061] It should be emphasized that each intelligent circuit breaker 14 is connected with at least one load device 16, that is, the intelligent circuit breaker 14 can be connected with one, two or more load devices 16. In the case that the intelligent circuit breaker 14 is connected with a plurality of load devices 16, the power consumption priority orders of the plurality of load devices 16 connected with the same intelligent circuit breaker 14 are the same. In this design, a single intelligent circuit breaker 14 corresponds to a single power consumption priority order, and when the energy storage device 12 controls the corresponding intelligent circuit breaker 14 to be opened, the plurality of load devices 16 with the same power consumption priority order no longer work, so as to ensure that power is supplied to the load device 16 with a higher power consumption priority order. In addition, compared with the mode that each intelligent circuit breaker 14 is connected with only one load device 16, this design is beneficial to reducing the number of intelligent circuit breakers 14, and thus reducing the cost.

[0062] The application aims to provide a kind of energy storage system 1, energy storage device 12 is divided according to the obtained power priority order information, the load level (power priority order) of multiple load devices 16;In the case of power grid 22 outage, based on power priority order, the current maximum output power value and historical power information, control multiple intelligent circuit breaker 14 to open or close, to ensure that the power supply is preferentially supplied to the load device 16 with higher power priority order.This design can optimize the power scheduling when the power grid 22 is powered off, so that the energy storage system 1 can ensure the operation of important loads under the condition of limited output power, which is beneficial to improve user experience.

[0063] In some embodiments, optionally, to realize the differentiated management of load power supply (differentiated management of multiple load devices 16 with different power priority order), the energy storage device 12 divides the load devices 16 into primary load 161, secondary load 162 and tertiary load 163 according to the power priority order information set by the user in advance.

[0064] It should be noted that the primary load 161 refers to important load, such as home security devices and refrigerator and other devices.Secondary load 162 refers to general load, such as air conditioning and other devices.Tertiary load 163 refers to unimportant load, such as lighting devices, entertainment devices and electric water heater and other devices.Among them, there may be different needs at different time periods or different users, so the power priority order of load devices 16 can be adjusted flexibly.

[0065] Optionally, the energy storage device 12 is used for communication connection with the user terminal.The energy storage device 12 is used for obtaining power priority order information from the user terminal, and determining the power priority order of multiple load devices 16 based on the power priority order information.

[0066] It should be noted that the user terminal can be a smart phone, tablet computer, notebook computer and smart watch and other devices.

[0067] Optionally, the user can set the power priority order of multiple load devices 16 through the APP (Application, application) on the mobile terminal, and then determine the priority of each intelligent circuit breaker 14, and the configuration information is synchronized to the energy storage device 12 through the cloud platform, forming a fixed priority mapping relationship.

[0068] In some embodiments, optionally, the energy storage all-in-one machine (the energy storage device 12) and the intelligent circuit breaker 14 both support power carrier communication, so that the energy storage device 12 can monitor the household power consumption in real time through the power line. The energy storage all-in-one machine can connect to the network and the cloud platform for MQTT (Message Queuing Telemetry Transport) communication. When the device is installed, the user sets the relevant information of the energy storage all-in-one machine through the mobile phone APP, and configures the intelligent circuit breaker 14 in communication with the energy storage all-in-one machine. The user can set each intelligent circuit breaker 14 to the corresponding load level through the APP, so that the energy storage all-in-one machine controls the opening or closing of multiple intelligent circuit breakers 14 when power failure occurs, to ensure that the power supply is preferentially given to the load devices 16 with higher priority.

[0069] In some embodiments, optionally, when the power grid 22 is powered off, the energy storage device 12 quickly switches to an off-grid backup power mode. The energy storage device 12 sends a wake-up instruction to each intelligent circuit breaker 14 through power carrier communication, to ensure that all intelligent circuit breakers 14 restore communication connection and feed back the current state. The energy storage device 12 calls the pre-stored power consumption priority order information, combines the current maximum output power value calculated in real time by itself, and the historical power consumption information (mainly referring to historical peak power and continuous running power, to avoid misjudgment due to instantaneous power fluctuation) obtained through the intelligent circuit breaker 14, and introduces the user's pre-set step load offset value as a power redundancy guarantee (to prevent power overload caused by the simultaneous start of multiple levels of load), to build a load power supply decision model.

[0070] The energy storage device 12 will record the power consumption of each intelligent circuit breaker 14 in real time (as historical power consumption information in subsequent steps). In the case of power failure of the power grid 22, the energy storage device 12 outputs power to restore communication of the intelligent circuit breaker 14; according to the power consumption of each intelligent circuit breaker 14 before power failure, the multiple intelligent circuit breakers 14 are controlled to be opened or closed, so that the energy storage device 12 can preferentially ensure the operation of important loads under the condition of limited output power.

[0071] In a specific embodiment, the intelligent circuit breaker 14 is an intelligent socket.

[0072] In some embodiments, optionally, the energy storage device 12 is connected to the power grid 22, and a power meter 23 is arranged between the energy storage device 12 and the power grid 22. In other words, the power meter 23 is connected to the energy storage device 12, and the power meter 23 is connected to the power grid 22.

[0073] The energy storage device 12 and the power meter 23 are in communication connection, and the energy storage device 12 is used to obtain the power parameter information of the power grid side through the power meter 23.

[0074] In some embodiments, the energy storage device 12 determines, according to the power consumption priority order information, the primary load 161, the secondary load 162 and the tertiary load 163 among the plurality of load devices 16.

[0075] The power consumption priority order of the primary load 161 is higher than that of the secondary load 162, and the power consumption priority order of the secondary load 162 is higher than that of the tertiary load 163.

[0076] Optionally, in order to realize differentiated management of power supply for the load (differentiated management of the plurality of load devices 16 with different power consumption priority orders), the energy storage device 12 divides the load devices 16 into the primary load 161, the secondary load 162 and the tertiary load 163 according to the power consumption priority order information pre-set by the user.

[0077] It should be noted that the primary load 161 refers to important loads, such as home security devices and refrigerators. The secondary load 162 refers to general loads, such as air conditioners. The tertiary load 163 refers to unimportant loads, such as lighting devices, entertainment devices and electric water heaters. Among them, there are different needs at different time periods or for different users, so the power consumption priority order of the load devices 16 can be flexibly adjusted.

[0078] Optionally, the energy storage device 12 is configured to be in communication connection with the user terminal. The energy storage device 12 is configured to obtain the power consumption priority order information from the user terminal, and determine the power consumption priority order of the plurality of load devices 16 based on the power consumption priority order information.

[0079] The energy storage device 12 receives the power consumption priority order information uploaded by the user through the APP through the MQTT communication protocol, and binds and stores the power consumption priority order information with the identification information of each smart circuit breaker 14 to form a corresponding mapping relationship of “smart circuit breaker 14-load device 16-power consumption priority order”, which provides a decision basis for subsequent power supply scheduling.

[0080] In the case of power failure of the power grid 22, the energy storage device 12 controls the plurality of smart circuit breakers 14 to be opened or closed based on the power consumption priority order, the current maximum output power value and the historical power consumption information, so as to supply power to the primary load 161, the secondary load 162 and the tertiary load 163, or to supply power to the primary load 161 and the secondary load 162, or to supply power to the primary load 161.

[0081] It should be noted that the energy storage device 12 is in communication connection with the smart circuit breaker 14, and the energy storage device 12 can obtain the historical power consumption information of the load device 16 in real time through the smart circuit breaker 14. Among them, the historical power consumption information includes the power consumption of each load device 16 before power failure.

[0082] Optionally, the sum of the power consumption of all the primary loads 161 (the first total power consumption value of the primary loads 161), the sum of the power consumption of all the secondary loads 162 (the second total power consumption value of the secondary loads 162), and the sum of the power consumption of all the tertiary loads 163 (the third total power consumption value of the tertiary loads 163) are determined according to the historical power consumption information.

[0083] Based on the power consumption priority order, the current maximum output power value, the sum of the power consumption of all the primary loads 161, the sum of the power consumption of all the secondary loads 162, and the sum of the power consumption of all the tertiary loads 163, the plurality of intelligent circuit breakers 14 are controlled to be opened or closed so that the energy storage device 12 supplies power to the primary loads 161, the secondary loads 162, and the tertiary loads 163, or to the primary loads 161 and the secondary loads 162, or to the primary loads 161.

[0084] By classifying the load levels of the plurality of load devices 16, the energy storage device 12 can accurately identify high-priority loads after the power grid 22 is powered off, and preferentially ensure continuous power supply to the primary loads 161, effectively solving the problem of power supply disorder and important equipment downtime after power failure in the prior art, which is conducive to improving user experience.

[0085] Based on the dynamic matching of the historical power consumption information and the current maximum output power, the energy storage device 12 can accurately determine the feasibility of supplying power to the load devices 16 of each power consumption priority order, avoid power waste caused by blindly connecting low-priority, high-power consumption load devices 16, and preferentially ensure the operation of important loads under the limited output power of the energy storage device 12, thereby prolonging the power supply time for important loads.

[0086] In some embodiments, the energy storage device 12 optionally calculates the first total power consumption value of the primary loads 161, the second total power consumption value of the secondary loads 162, and the third total power consumption value of the tertiary loads 163 based on the historical power consumption information.

[0087] The energy storage device 12 is communicatively connected to each intelligent circuit breaker 14 through an integrated PLC (Power Line Communication, also known as Power Line Carrier Communication) module and / or a WIFI (Wireless Fidelity) module. The energy storage device 12 obtains the historical power consumption information of the load devices 16 (power consumption loads) in real time through the intelligent circuit breakers 14.

[0088] In view of the power fluctuations that may exist during the operation of the load device 16 (such as the start-stop of a refrigerator compressor, the switching of a lighting device, etc.), the energy storage device 12 does not directly use single-time collected data, but through data processing algorithms such as peak filtering, carries out multi-dimensional analysis and integration on the collected real-time power data, and finally determines the power value of the load device 16.

[0089] According to the historical power consumption information, the sum of the power consumption of all the primary loads 161 (the first total power consumption value of the primary loads 161), the sum of the power consumption of all the secondary loads 162 (the second total power consumption value of the secondary loads 162), and the sum of the power consumption of all the tertiary loads 163 (the third total power consumption value of the tertiary loads 163) are determined.

[0090] Based on the power consumption priority order, the current maximum output power value, the first total power consumption value, the second total power consumption value, and the third total power consumption value, the energy storage device 12 controls the opening or closing of the plurality of intelligent circuit breakers 14, so that the energy storage device 12 supplies power to the primary loads 161, the secondary loads 162, and the tertiary loads 163, or to the primary loads 161 and the secondary loads 162, or to the primary loads 161.

[0091] Optionally, the energy storage device 12 monitors the remaining capacity of the battery module 124 and the inverter output capability of the energy storage converter 121 in real time, dynamically calculates and updates the current maximum output power value.

[0092] Let the current maximum output power value of the energy storage device 12 be P Omax , the first total power consumption value of the primary loads 161 be P L1 , the second total power consumption value of the secondary loads 162 be P L2 , and the third total power consumption value of the tertiary loads 163 be P L3 , the switch state of the intelligent circuit breaker 14 corresponding to the primary loads 161 be B L1 , the switch state of the intelligent circuit breaker 14 corresponding to the secondary loads 162 be B L2 , and the switch state of the intelligent circuit breaker 14 corresponding to the tertiary loads 163 be B L3 In addition, the safety factor is P offset , which is also called redundancy factor or step load offset value.

[0093] If P Omax ≥ P L1 + P L2 + P L3 + P offset , the energy storage device 12 issues a closing instruction to all the intelligent circuit breakers 14, B L1 , B L2 , and BL3 are in the closed state, so that the energy storage device 12 supplies power to the primary load 161, the secondary load 162 and the tertiary load 163.

[0094] If P L1 + P L2 + P offset ≤ P Omax < P L1 + P L2 + P L3 + P offset , the energy storage device 12 issues a closing instruction to the intelligent circuit breaker 14 corresponding to the primary load 161, issues a closing instruction to the intelligent circuit breaker 14 corresponding to the secondary load 162, and issues an opening instruction to the intelligent circuit breaker 14 corresponding to the tertiary load 163, B L1 and B L2 are in the closed state, B L3 is in the open state, so that the energy storage device 12 supplies power to the primary load 161 and the secondary load 162, and stops supplying power to the tertiary load 163. While ensuring power supply to the core and commonly used loads, the power shortage caused by the access of non-essential loads is avoided.

[0095] If P L1 + P offset ≤ P Omax < P L1 + P L2 + P offset , the energy storage device 12 issues a closing instruction to the intelligent circuit breaker 14 corresponding to the primary load 161, issues an opening instruction to the intelligent circuit breaker 14 corresponding to the secondary load 162, and issues an opening instruction to the intelligent circuit breaker 14 corresponding to the tertiary load 163, B L1 is in the closed state, B L3 and B L2 are in the open state, so that the energy storage device 12 supplies power to the primary load 161, and stops supplying power to the secondary load 162 and the tertiary load 163.

[0096] If P Omax < P L1 + P offset , the energy storage device 12 issues a power shortage reminder information, and after a first preset time, controls the intelligent circuit breaker 14 corresponding to the tertiary load 163 to be opened.

[0097] The energy storage device 12 continuously collects and updates the historical power consumption data of the load device 16, and can dynamically adapt to the increase or decrease of the load device 16, power changes and other scenarios. Based on the dynamic matching of the historical power consumption data and the current maximum output power, the energy storage device 12 can accurately judge the feasibility of supplying power to the load device 16 with each power consumption priority order, avoid power waste caused by blindly connecting the load device 16 with low priority and high power consumption, and make the energy storage device 12 prioritize the operation of important loads under the condition of limited output power, thereby prolonging the power supply time for important loads.

[0098] In some embodiments, the energy storage device 12 is optionally connected to each intelligent circuit breaker 14 through an integrated PLC module, and the energy storage device 12 is connected to each intelligent circuit breaker 14 through an integrated WIFI module.

[0099] Due to the use of two communication methods, in the case of poor WIFI module signal, communication connection can still be achieved through the PLC module, which is conducive to improving the accuracy of data collection results and providing strong data support for data analysis.

[0100] In some embodiments, optionally, when the current maximum output power value is greater than or equal to the sum of the first total power consumption value, the second total power consumption value, the third total power consumption value, and the safety factor, the energy storage device 12 controls all the intelligent circuit breakers 14 to be closed, so that the energy storage device 12 supplies power to the first load 161, the second load 162, and the third load 163.

[0101] In the case of P Omax ≥ P L1 + P L2 + P L3 + P offset , it means that the power supply capacity of the energy storage device 12 completely covers the power consumption demand of all load devices 16, and the energy storage device 12 issues a closing instruction to all intelligent circuit breakers 14, BL1, BL2 and BL3 are in the closed state, so that the energy storage device 12 supplies power to the first load 161, the second load 162 and the third load 163.

[0102] In the case where the current maximum output power value is less than the sum of the first total power consumption value, the second total power consumption value, the third total power consumption value, and the safety factor, and greater than or equal to the sum of the first total power consumption value, the second total power consumption value, and the safety factor, the energy storage device 12 controls the intelligent circuit breaker 14 connected to the third load 163 to be disconnected, so that the energy storage device 12 supplies power to the first load 161 and the second load 162.

[0103] In the case of P L1 + P L2 + P offset≤P Omax <P L1 +P L2 +P L3 +P offset In the case of P L1 and B L2 are in the closed state, and B L3 is in the open state, so that the energy storage device 12 supplies power to the primary load 161 and the secondary load 162 and stops supplying power to the tertiary load 163. In this case, the energy storage device 12 can supply power to the primary load 161 and the secondary load 162 while avoiding power shortage caused by the access of the tertiary load 163.

[0104] In the case of the current maximum output power value being less than the sum of the first total power value, the second total power value, and the safety factor and greater than or equal to the sum of the first total power value and the safety factor, the energy storage device 12 controls the smart circuit breaker 14 connected to the tertiary load 163 to be open and controls the smart circuit breaker 14 connected to the secondary load 162 to be open, so that the energy storage device 12 supplies power to the primary load 161.

[0105] In the case of P L1 +P offset ≤P Omax <P L1 +P L2 +P offset In the case of P L1 is in the closed state, B L3 and B L2 are in the open state, so that the energy storage device 12 supplies power to the primary load 161 and stops supplying power to the secondary load 162 and the tertiary load 163.

[0106] The energy storage device 12 can accurately determine the feasibility of supplying power to the load devices 16 of each power priority order, avoid power waste caused by the blind access of low-priority and high-power-consumption load devices 16, and preferentially ensure the operation of important loads under the limited output power of the energy storage device 12, thereby prolonging the power supply time of important loads.

[0107] By setting the safety factor, sufficient power redundancy buffer is provided for the power supply process, effectively avoiding the risks of voltage instability, equipment overload and other factors caused by load starting impact, instantaneous power peak, and preventing important loads from being damaged or shut down due to abnormal power supply.

[0108] In some embodiments, optionally, in the case that the current maximum output power value is less than the sum of the first total power consumption value and the safety factor, and greater than or equal to the first total power consumption value, the energy storage device 12 controls the smart circuit breaker 14 connected to the third load 163 to be disconnected, controls the smart circuit breaker 14 connected to the second load 162 to be disconnected, and controls the smart circuit breaker 14 connected to the first load 161 to be disconnected after a first preset time length.

[0109] In the case of P L1 ≤ P Omax < P L1 + P offset , it indicates that the power supply capacity of the energy storage device 12 can only guarantee the power demand of the first load 161 in a short time, the energy storage device 12 issues a closing instruction to the smart circuit breaker 14 corresponding to the first load 161, issues a disconnecting instruction to the smart circuit breaker 14 corresponding to the second load 162, and issues a disconnecting instruction to the smart circuit breaker 14 corresponding to the third load 163, and issues a disconnecting instruction to the smart circuit breaker 14 corresponding to the first load 161 after a first preset time length, so that the energy storage device 12 supplies power to the first load 161 in a short time.

[0110] In some embodiments, optionally, in the case that the current maximum output power value is less than the first total power consumption value, the energy storage device 12 controls all smart circuit breakers 14 to be disconnected.

[0111] In the case of P Omax < P L1 , it indicates that the power supply capacity of the energy storage device 12 is insufficient, the energy storage device 12 issues an insufficient power reminder information, and controls all smart circuit breakers 14 to be disconnected.

[0112] When the output power of the energy storage device 12 is insufficient to cover the basic power demand of the first load 161, forced power supply can cause the energy storage device 12 to be in an overload state for a long time, causing faults such as over-discharge of the battery module 124 and overheating of the inverter, and even damaging the load device 16. By stopping power supply to all load devices 16, it is beneficial to improve safety performance and reduce equipment maintenance and replacement costs.

[0113] In some embodiments, optionally, the energy storage device 12 and the smart circuit breaker 14 are communicatively connected through power carrier communication; and / or the energy storage device 12 and the smart circuit breaker 14 are communicatively connected through wireless communication.

[0114] The power carrier communication and / or wireless communication between the energy storage device 12 and the intelligent circuit breaker 14 does not need to arrange a traditional CAN (Controller Area Network) communication line, which is beneficial to reduce the wiring cost and workload, and can improve the accuracy of data acquisition results, thereby providing strong data support for data analysis.

[0115] In a specific embodiment, the energy storage device 12 and the intelligent circuit breaker 14 are connected in communication only by the power carrier communication.

[0116] In a specific embodiment, the energy storage device 12 and the intelligent circuit breaker 14 are connected in communication only by the wireless communication.

[0117] In a specific embodiment, the energy storage device 12 and the intelligent circuit breaker 14 are connected in communication by the power carrier communication, and the energy storage device 12 and the intelligent circuit breaker 14 are connected in communication by the wireless communication.

[0118] Due to the use of two communication methods, in the case of poor WIFI module signal, communication connection can still be achieved through the PLC module, which is beneficial to improve the accuracy of data acquisition results, thereby providing strong data support for data analysis.

[0119] In some embodiments, as shown in Figure 2 The energy storage device 12 includes an energy storage converter 121, an EMS module 122, a BMS module 123, and a battery module 124. The BMS module 123 is electrically connected to the battery module 124, and the BMS module 123 is electrically connected to the energy storage converter 121. The EMS module 122 is electrically connected to the BMS module 123, and the EMS module 122 is electrically connected to the energy storage converter 121. The EMS module 122 is in communication with the intelligent circuit breaker 14. The energy storage converter 121 is used to connect the photovoltaic panel 21 and the power grid 22.

[0120] It should be noted that BMS (Battery Management System) refers to a battery management system. EMS (Energy Management System) refers to an energy management system.

[0121] The BMS module 123 is electrically connected with the battery module 124. The BMS module 123 is used for collecting core parameters of the battery module 124 in real time, including single cell voltage, total voltage, charging and discharging current, cell temperature, residual capacity (SOC, State of Charge), health status (SOH, State of Health), and the like, and simultaneously has safety control functions such as overcharge protection, overdischarge protection, overtemperature protection, and short circuit protection. The BMS module 123 can dynamically adjust the battery charging and discharging strategy, and avoid performance degradation or safety hazards of the battery module 124 caused by abnormal working conditions.

[0122] The power conversion system 121 (PCS) is equivalent to a power bridge between the energy storage device 12 and external circuits (the photovoltaic panel 21, the power grid 22, the load device 16, or other energy storage devices 12). The power conversion system 121 is used for realizing different types of power conversion.

[0123] Optionally, in the discharging mode, the power conversion system 121 converts direct current stored by the battery module 124 into alternating current available for the household load (the load device 16) or the power grid 22. In the charging mode, the power conversion system 121 converts alternating current of the power grid 22 or the photovoltaic panel 21 into direct current capable of charging the battery module 124.

[0124] The BMS module 123 monitors the operating parameters of the battery module 124 in real time, effectively avoids risks such as overcharge, overdischarge, and overheating of the battery module 124, delays the aging speed of the battery module 124, and guarantees long-term stable operation of the battery module 124. Through the cooperative control of the BMS module 123, the EMS module 122, and the power conversion system 121, the charging and discharging process of the battery module 124 is always in the optimal working condition, which is beneficial to prolong the service life of the battery module 124.

[0125] In some embodiments, as shown in FIG. 1, the energy storage device 12 further includes a first PLC module 125, and the intelligent circuit breaker 14 includes a second PLC module 142. The first PLC module 125 is in communication connection with the second PLC module 142. Figure 1

[0126] The energy storage device 12 is in communication connection with each intelligent circuit breaker 14 through the integrated PLC module. Since the energy storage device 12 and the intelligent circuit breaker 14 can realize power line carrier communication through existing power lines, it is not necessary to arrange traditional CAN communication lines, which is beneficial to reduce wiring cost and workload.

[0127] In an embodiment of the present application, the power-off emergency linkage control method is used for the energy storage device 12 of the energy storage system 1 in any of the above embodiments. ​

[0128] As Figure 3 shown, the power-off emergency linkage control method comprises:

[0129] S302, determining the power consumption priority order of the plurality of load devices based on the acquired power consumption priority order information.

[0130] To realize differentiated management of load power supply (differentiated management of a plurality of load devices with different power consumption priority orders), the energy storage device divides the load devices into first-level load, second-level load and third-level load according to the power consumption priority order information set by the user in advance.

[0131] Optionally, the energy storage device is used in communication connection with the user terminal. The energy storage device is used to acquire the power consumption priority order information from the user terminal, and determine the power consumption priority order of the plurality of load devices based on the power consumption priority order information.

[0132] It should be noted that the user terminal can be a smart phone, a tablet computer, a notebook computer, a smart watch and the like.

[0133] Optionally, the user can set the power consumption priority order of the plurality of load devices through an APP (Application) on the mobile terminal, and then determine the priority of each smart circuit breaker. The configuration information is synchronized to the energy storage device through a cloud platform, forming a fixed priority mapping relationship.

[0134] S304, in the case of power grid outage, acquiring the historical power consumption information of the load devices through the smart circuit breaker.

[0135] When the power grid is out of power, the energy storage device quickly switches to the off-grid standby power mode. The energy storage device issues a wake-up instruction to each smart circuit breaker through power carrier communication, ensures that all smart circuit breakers restore communication connection and feedback the current state; the energy storage device calls the pre-stored power consumption priority order information, combines the current maximum output power value calculated in real time by itself, and the historical power consumption information (mainly referring to the historical peak power and continuous running power, to avoid misjudgment due to instantaneous power fluctuation) acquired through the smart circuit breaker, and introduces the user's preset step load offset value as a power redundancy guarantee (to prevent power overload caused by simultaneous start of multiple levels of load), to build a load power supply decision model.

[0136] The energy storage device will record the power consumption of each smart circuit breaker in real time (as the historical power consumption information in the subsequent steps).

[0137] S306, based on the power consumption priority order, the current maximum output power value of the energy storage device and the historical power consumption information, controlling the plurality of smart circuit breakers to open or close, so that the energy storage device supplies power to at least one of the plurality of load devices through the smart circuit breaker.

[0138] In the case of power grid outage, the energy storage device outputs electric energy to make the intelligent circuit breaker resume communication; according to the power consumption of each intelligent circuit breaker before the outage, the plurality of intelligent circuit breakers are controlled to be opened or closed, so that the energy storage device ensures the operation of important loads under the condition of limited output power.

[0139] The present application aims to provide a power outage emergency linkage control method, the energy storage device divides the load level (power consumption priority order) of the plurality of load devices according to the obtained power consumption priority order information; in the case of power grid outage, based on the power consumption priority order, the current maximum output power value and the historical power consumption power information, the plurality of intelligent circuit breakers are controlled to be opened or closed to ensure that the load devices with higher power consumption priority order are powered first. This design can optimize the power scheduling in the case of power grid outage, so that the energy storage system ensures the operation of important loads under the condition of limited output power, which is beneficial to improve the user experience.

[0140] In some embodiments, optionally, as shown in Figure 4 S302 (determining the power consumption priority order of the plurality of load devices based on the obtained power consumption priority order information) includes:

[0141] S3022, determining the first-level load, the second-level load and the third-level load in the plurality of load devices according to the obtained power consumption priority order information; wherein the power consumption priority order of the first-level load is higher than that of the second-level load, and the power consumption priority order of the second-level load is higher than that of the third-level load.

[0142] The power consumption priority order of the first-level load is higher than that of the second-level load, and the power consumption priority order of the second-level load is higher than that of the third-level load.

[0143] Optionally, in order to realize the differentiated management of load power supply (differentiated management of the plurality of load devices with different power consumption priority orders), the energy storage device divides the load devices into first-level load, second-level load and third-level load according to the power consumption priority order information set by the user in advance.

[0144] It should be noted that the first-level load refers to important load, such as home security devices and refrigerator and the like. The second-level load refers to general load, such as air conditioner and the like. The third-level load refers to unimportant load, such as lighting device, entertainment device and electric water heater and the like. Among them, there are different needs at different time periods or different users, therefore, the power consumption priority order of the load device can be flexibly adjusted.

[0145] Optionally, the energy storage device is used to communicate with the user terminal. The energy storage device is used to obtain power consumption priority information from the user terminal and determine the power consumption priority order of multiple load devices based on the power consumption priority information.

[0146] The energy storage device receives the power consumption priority information uploaded by users through the APP via the MQTT communication protocol, and binds and stores the power consumption priority information with the identification information of each smart circuit breaker, forming a corresponding mapping relationship of "smart circuit breaker-load device-power consumption priority order", providing a basis for decision-making for subsequent power supply scheduling.

[0147] In some embodiments, optionally, such as Figure 5 As shown, S306 (based on power consumption priority, the current maximum output power of the energy storage device, and historical power consumption information, controlling multiple smart circuit breakers to open or close, so that the energy storage device can supply power to at least one of multiple load devices through the smart circuit breakers) includes:

[0148] S3062 controls multiple smart circuit breakers to open or close based on power consumption priority, current maximum output power, and historical power consumption information, so that the energy storage device can supply power to primary loads, secondary loads, and tertiary loads, or supply power to primary loads and secondary loads, or supply power to primary loads.

[0149] It should be noted that the energy storage device is communicatively connected to the smart circuit breaker, enabling the energy storage device to obtain real-time historical power consumption information about the load devices through the smart circuit breaker. This historical power consumption information includes the power consumption of each load device before the power outage.

[0150] Optionally, the sum of power consumption of all primary loads (the first total power consumption of primary loads), the sum of power consumption of all secondary loads (the second total power consumption of secondary loads), and the sum of power consumption of all tertiary loads (the third total power consumption of tertiary loads) can be determined based on historical power consumption information.

[0151] Based on the power consumption priority order, the current maximum output power value, the sum of the power consumption of all primary loads, the sum of the power consumption of all secondary loads, and the sum of the power consumption of all tertiary loads, multiple smart circuit breakers are controlled to open or close, so that the energy storage device can supply power to the primary loads, secondary loads, and tertiary loads, or supply power to the primary loads and secondary loads, or supply power to the primary loads.

[0152] By classifying the load levels of multiple load devices, energy storage devices can accurately identify high-priority loads after a power outage and prioritize ensuring continuous power supply to first-level loads. This effectively solves the problems of disordered power supply and shutdown of important equipment after a power outage in traditional technologies, and helps improve the user experience.

[0153] Based on the dynamic matching of the historical power consumption information and the current maximum output power, the energy storage device can accurately determine the feasibility of supplying power to the load devices in each power consumption priority order, avoid power waste caused by blindly connecting low-priority and high-power-consumption load devices, and preferentially ensure the operation of important loads under the limited output power of the energy storage device, thereby prolonging the power supply time for important loads.

[0154] In some embodiments, optionally, as shown in FIG. 6, after S304 (acquiring historical power consumption information of load devices through intelligent circuit breakers in the case of power failure of the power grid), the power failure emergency linkage control method further includes: Figure 6

[0155] S305, calculating a first total power consumption value of primary loads, a second total power consumption value of secondary loads, and a third total power consumption value of tertiary loads based on the historical power consumption information.

[0156] The energy storage device is communicatively connected to each intelligent circuit breaker through an integrated PLC (Power Line Communication, also known as power carrier communication) module and / or a WIFI (Wireless Fidelity, also known as wireless fidelity) module. The energy storage device acquires historical power consumption information of load devices (power consumption loads) in real time through the intelligent circuit breakers.

[0157] Considering the power fluctuations that may occur during the operation of the load devices (such as the start-stop of the refrigerator compressor, the switching of lighting devices, etc.), the energy storage device does not directly use single collection data, but uses a multi-dimensional analysis and integration of real-time power data collected through peak filtering and other data processing algorithms to ultimately determine the power consumption value of the load devices.

[0158] According to the historical power consumption information, the sum of the power consumption of all primary loads (the first total power consumption value of primary loads), the sum of the power consumption of all secondary loads (the second total power consumption value of secondary loads), and the sum of the power consumption of all tertiary loads (the third total power consumption value of tertiary loads) are determined.

[0159] In some embodiments, optionally, as shown in FIG. 6, S3062 (controlling multiple intelligent circuit breakers to be opened or closed based on the power consumption priority order, the current maximum output power value, and the historical power consumption information, so that the energy storage device supplies power to primary loads, secondary loads, and tertiary loads, or supplies power to primary loads and secondary loads, or supplies power to primary loads) includes: Figure 7

[0160] ​​S3063, based on the power consumption priority order, the current maximum output power value, the first total power consumption value, the second total power consumption value, and the third total power consumption value, controlling the plurality of intelligent circuit breakers to be opened or closed, so that the energy storage device supplies power to the primary load, the secondary load, and the tertiary load, or supplies power to the primary load and the secondary load, or supplies power to the primary load.

[0161] Optionally, the energy storage device monitors the remaining capacity of the battery module and the inverter output capability of the energy storage converter in real time, dynamically calculates and updates the current maximum output power value.

[0162] Let the current maximum output power value of the energy storage device be P Omax , the first total power consumption value of the primary load be P L1 , the second total power consumption value of the secondary load be P L2 , and the third total power consumption value of the tertiary load be P L3 , the switch state of the intelligent circuit breaker corresponding to the primary load be B L1 , the switch state of the intelligent circuit breaker corresponding to the secondary load be B L2 , and the switch state of the intelligent circuit breaker corresponding to the tertiary load be B L3 . In addition, let the safety factor be P offset , which is also called the redundancy factor or step load offset value.

[0163] If P Omax ≥ P L1 + P L2 + P L3 + P offset , the energy storage device issues a closing instruction to all intelligent circuit breakers, B L1 , B L2 , and B L3 are in the closed state, so that the energy storage device supplies power to the primary load, the secondary load, and the tertiary load.

[0164] If P L1 + P L2 + P offset ≤ P Omax < P L1 + P L2 + P L3 + P offset , the energy storage device issues a closing instruction to the intelligent circuit breaker corresponding to the primary load, a closing instruction to the intelligent circuit breaker corresponding to the secondary load, and an opening instruction to the intelligent circuit breaker corresponding to the tertiary load, B L1 and B L2 are in the closed state, and B L3In the disconnected state, the energy storage device supplies power to the primary load and the secondary load and stops supplying power to the tertiary load. While ensuring power supply to the core and common load, the power shortage caused by connecting the non-essential load is avoided.

[0165] If P L1 + P offset ≤ P Omax < P L1 + P L2 + P offset , the energy storage device issues a closing instruction to the intelligent circuit breaker corresponding to the primary load, issues a disconnecting instruction to the intelligent circuit breaker corresponding to the secondary load, and issues a disconnecting instruction to the intelligent circuit breaker corresponding to the tertiary load, B L1 is in the closed state, B L3 and B L2 are in the disconnected state, so that the energy storage device supplies power to the primary load and stops supplying power to the secondary load and the tertiary load.

[0166] If P Omax < P L1 + P offset , the energy storage device issues an insufficient power supply reminder information, and after a first preset time, controls the intelligent circuit breaker corresponding to the tertiary load to be disconnected.

[0167] The energy storage device continuously collects and updates the historical power consumption data of the load device, and can dynamically adapt to the scenarios such as addition or reduction of the load device and power change. Based on the dynamic matching of the historical power consumption data and the current maximum output power, the energy storage device can accurately judge the feasibility of supplying power to the load device with each power consumption priority order, avoid power waste caused by blindly connecting low-priority and high-power consumption load devices, and make the energy storage device prioritize the operation of important loads under the condition of limited output power, thereby prolonging the power supply time of important loads.

[0168] In an embodiment of the present application, as shown in Figure 8 S3063 (controlling the plurality of intelligent circuit breakers to be disconnected or closed based on the power consumption priority order, the current maximum output power value, the first total power consumption value, the second total power consumption value, and the third total power consumption value, so that the energy storage device supplies power to the primary load, the secondary load, and the tertiary load, or supplies power to the primary load and the secondary load, or supplies power to the primary load) includes:

[0169] S3064, in the case where the current maximum output power value is greater than or equal to the sum of the first total power consumption value, the second total power consumption value, the third total power consumption value, and the safety factor, all the intelligent circuit breakers are controlled to be closed, so that the energy storage device supplies power to the primary load, the secondary load, and the tertiary load.

[0170] If P Omax ≥ PL1 +P L2 +P L3 +P offset In this case, it means that the power supply capacity of the energy storage device fully covers the power demand of all load devices. The energy storage device issues a closing command to all smart circuit breakers, and BL1, BL2 and BL3 are all in the closed state, so that the energy storage device can supply power to the primary load, secondary load and tertiary load.

[0171] S3065 controls the intelligent circuit breaker connected to the third-level load to disconnect when the current maximum output power value is less than the sum of the first total power consumption, the second total power consumption, the third total power consumption, and the safety factor, or greater than or equal to the sum of the first total power consumption, the second total power consumption, and the safety factor, so that the energy storage device can supply power to the first-level load and the second-level load.

[0172] In P L1 +P L2 +P offset ≤P Omax <P L1 +P L2 +P L3 +P offset In this case, it indicates that the power supply capacity of the energy storage device can cover the power demand of the primary and secondary loads. The energy storage device issues a closing command to the smart circuit breaker corresponding to the primary load, a closing command to the smart circuit breaker corresponding to the secondary load, and a disconnection command to the smart circuit breaker corresponding to the tertiary load. L1 and B L2 Both are in a closed state, B L3 The system is in a disconnected state, allowing the energy storage device to supply power to the primary and secondary loads while ceasing power supply to the tertiary load. In this configuration, the energy storage device can ensure power supply to the primary and secondary loads while avoiding insufficient power due to the connection of a tertiary load.

[0173] S3066, when the current maximum output power value is less than the sum of the first total power consumption, the second total power consumption, and the safety factor, or greater than or equal to the sum of the first total power consumption and the safety factor, controls the intelligent circuit breaker connected to the tertiary load to open, and controls the intelligent circuit breaker connected to the secondary load to open, so that the energy storage device can supply power to the primary load.

[0174] In P L1 +P offset ≤P Omax <P L1 +P L2 +P offsetIn the case that the power supply capacity of the energy storage device can only guarantee the power demand of the primary load, the energy storage device issues a closing instruction to the intelligent circuit breaker corresponding to the primary load, issues a disconnecting instruction to the intelligent circuit breaker corresponding to the secondary load, and issues a disconnecting instruction to the intelligent circuit breaker corresponding to the tertiary load, B L1 is in the closed state, B L3 and B L2 are in the disconnected state, so that the energy storage device supplies power to the primary load and stops supplying power to the secondary load and the tertiary load.

[0175] The energy storage device can accurately determine the feasibility of supplying power to the load devices of each power priority order, avoid power waste caused by blindly connecting low-priority and high-power-consumption load devices, and preferentially ensure the operation of important loads under limited output power, thereby prolonging the power supply time of important loads.

[0176] By setting a safety factor, sufficient power redundancy buffer is provided for the power supply process, effectively avoiding risks such as voltage instability and device overload caused by load start-up impact and instantaneous power peak, and preventing important loads from being damaged or shut down due to abnormal power supply.

[0177] In an embodiment of the present application, as shown in Figure 9 the power-off emergency linkage control method comprises the following steps:

[0178] S402, adding the photovoltaic all-in-one machine and the intelligent circuit breaker to the home through the APP.

[0179] It should be noted that APP (Application) refers to an application program. The photovoltaic all-in-one machine refers to an energy storage device.

[0180] S404, configuring the load level to which the intelligent circuit breaker belongs through the APP.

[0181] The purpose of this step is for the user to set the power priority order through the APP.

[0182] S406, determining whether the power grid is powered off.

[0183] Determine whether the power grid is powered off and generate a first determination result. If the first determination result is yes, perform S408; if the first determination result is no, perform S410.

[0184] S408, record the last active power value of each circuit breaker.

[0185] It should be noted that the circuit breaker refers to an intelligent circuit breaker. The last active power value refers to historical power consumption information.

[0186] S410, execute normal energy scheduling logic.

[0187] S412, the energy storage device supplies power to the intelligent circuit breaker, and the intelligent circuit breaker resumes communication.

[0188] S414, a tripping instruction is sent to the circuit breakers connected to the secondary and tertiary loads.

[0189] It should be noted that the circuit breakers connected to the secondary and tertiary loads refer to the intelligent circuit breakers connected to the secondary loads and the intelligent circuit breakers connected to the tertiary loads.

[0190] S416, the load grading strategy is executed.

[0191] S418, the power supply state is monitored.

[0192] S420, it is determined whether the power grid has resumed power supply.

[0193] It is determined whether the power grid has resumed power supply, and a second determination result is generated. If the second determination result is yes, S410 is executed; if the second determination result is no, S406 is returned.

[0194] In the present application, the terms "first", "second", "third" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance; the term "multiple" refers to two or more, unless otherwise explicitly limited. The terms "mounting", "connection", "connection", "fixing" and the like should be broadly understood, for example, "connection" can be fixed connection, or detachable connection, or integrally connected; "connection" can be directly connected, or indirectly connected through an intermediate medium. 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.

[0195] In the description of the present application, it should be understood that the terms "upper", "lower", "left", "right", "front", "back" and the like indicate the orientation or positional relationship shown in the drawings, and are only used for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or units referred to must have a particular direction, be constructed and operated in a particular orientation, therefore, it cannot be understood as a limitation on the present application.

[0196] In the description of the present application, the terms "one embodiment", "some embodiments", "a specific embodiment" and the like mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0197] The above merely describes the preferred embodiments of the present application, and is not used to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An energy storage system, characterized by, The energy storage device, a plurality of intelligent circuit breakers and a plurality of load devices, each of the intelligent circuit breakers is connected with at least one of the load devices, and the intelligent circuit breaker is used to connect with the energy storage device and a power grid; In the case that the intelligent circuit breaker is connected with a plurality of load devices, the power consumption priority order of the plurality of load devices connected with the same intelligent circuit breaker is the same; The energy storage device determines the power consumption priority order of the plurality of load devices based on the obtained power consumption priority order information; In the case that the power grid is powered off, the energy storage device obtains the historical power consumption information of the load device through the intelligent circuit breaker; based on the power consumption priority order, the current maximum output power value of the energy storage device and the historical power consumption information, the energy storage device controls the plurality of intelligent circuit breakers to be opened or closed, so that the energy storage device supplies power to at least one of the plurality of load devices through the intelligent circuit breaker.

2. The energy storage system of claim 1, wherein, The energy storage device determines a first-level load, a second-level load and a third-level load in the plurality of load devices according to the power consumption priority order information; wherein the power consumption priority order of the first-level load is higher than that of the second-level load, and the power consumption priority order of the second-level load is higher than that of the third-level load; In the case that the power grid is powered off, the energy storage device controls the plurality of intelligent circuit breakers to be opened or closed based on the power consumption priority order, the current maximum output power value and the historical power consumption information, so that the energy storage device supplies power to the first-level load, the second-level load and the third-level load, or supplies power to the first-level load and the second-level load, or supplies power to the first-level load.

3. The energy storage system of claim 2, wherein, The energy storage device calculates a first total power consumption value of the first-level load, a second total power consumption value of the second-level load and a third total power consumption value of the third-level load based on the historical power consumption information; The energy storage device controls the plurality of intelligent circuit breakers to be opened or closed based on the power consumption priority order, the current maximum output power value, the first total power consumption value, the second total power consumption value and the third total power consumption value, so that the energy storage device supplies power to the first-level load, the second-level load and the third-level load, or supplies power to the first-level load and the second-level load, or supplies power to the first-level load.

4. The energy storage system of claim 3, wherein, In the case that the current maximum output power value is greater than or equal to the sum of the first total power consumption value, the second total power consumption value, the third total power consumption value and a safety factor, the energy storage device controls all the intelligent circuit breakers to be closed, so that the energy storage device supplies power to the first-level load, the second-level load and the third-level load. In a case where the current maximum output power value is less than the sum of the first total power consumption value, the second total power consumption value, the third total power consumption value and the safety factor, and greater than or equal to the sum of the first total power consumption value, the second total power consumption value and the safety factor, the energy storage device controls the smart circuit breaker connected with the third load to be disconnected, so that the energy storage device supplies power to the first load and the second load. In a case where the current maximum output power value is less than the sum of the first total power consumption value, the second total power consumption value and the safety factor, and greater than or equal to the sum of the first total power consumption value and the safety factor, the energy storage device controls the smart circuit breaker connected with the second load to be disconnected, so that the energy storage device supplies power to the first load.

5. The energy storage system of claim 4, wherein, In a case where the current maximum output power value is less than the first total power consumption value, the energy storage device controls all the smart circuit breakers to be disconnected.

6. The energy storage system of any one of claims 1-5, wherein, The energy storage device and the smart circuit breaker are communicatively connected through power carrier communication and / or wireless communication.

7. The energy storage system of any one of claims 1 to 5, wherein, The energy storage device comprises an energy storage converter, an EMS module, a BMS module and a battery module. The BMS module is electrically connected with the battery module, and the BMS module is electrically connected with the energy storage converter. The EMS module is electrically connected with the BMS module, the EMS module is electrically connected with the energy storage converter, and the EMS module is communicatively connected with the smart circuit breaker. The energy storage converter is used to connect photovoltaic panels and the power grid.

8. The energy storage system of claim 7, wherein, The energy storage device further comprises a first PLC module, and the smart circuit breaker comprises a second PLC module, and the first PLC module is communicatively connected with the second PLC module.

9. A power-off emergency linkage control method, characterized by, The energy storage device for the energy storage system as claimed in any one of claims 1 to 8, and the power-off emergency linkage control method comprises: determining the power consumption priority order of a plurality of load devices based on the obtained power consumption priority order information; in a case where the power grid is powered off, obtaining historical power consumption information of the load devices through a smart circuit breaker; based on the power consumption priority order, the current maximum output power value of the energy storage device and the historical power consumption information, controlling a plurality of the smart circuit breakers to be disconnected or closed, so that the energy storage device supplies power to at least one of a plurality of the load devices through the smart circuit breaker.

10. The de-energization emergency linkage control method according to claim 9, characterized by, The determination of the power consumption priority order of a plurality of load devices based on the obtained power consumption priority order information comprises: determining a first load, a second load and a third load in a plurality of the load devices according to the obtained power consumption priority order information; wherein the power consumption priority order of the first load is higher than that of the second load, and the power consumption priority order of the second load is higher than that of the third load. The control of the plurality of smart breakers based on the power consumption priority order, the current maximum output power value of the energy storage device, and the historical power consumption information includes: The control of the plurality of smart breakers based on the power consumption priority order, the current maximum output power value, the first total power consumption value, the second total power consumption value, and the third total power consumption value includes:

11. The de-energization emergency linkage control method according to claim 10, characterized by, In the case of power failure of the power grid, after the historical power consumption information of the load device is obtained through the smart breaker, the power failure emergency linkage control method further includes: The control of the plurality of smart breakers based on the power consumption priority order, the current maximum output power value, the first total power consumption value, the second total power consumption value, and the third total power consumption value includes: In the case of power failure of the power grid, after the historical power consumption information of the load device is obtained through the smart breaker, the power failure emergency linkage control method further includes: The control of the plurality of smart breakers based on the power consumption priority order, the current maximum output power value, the first total power consumption value, the second total power consumption value, and the third total power consumption value includes:

12. The de-energization emergency linkage control method according to claim 11, characterized by, In the case of the current maximum output power value being greater than or equal to the sum of the first total power consumption value, the second total power consumption value, the third total power consumption value, and the safety factor, all the smart breakers are controlled to be closed, so that the energy storage device supplies power to the first-level load, the second-level load, and the third-level load. In the case of the current maximum output power value being less than the sum of the first total power consumption value, the second total power consumption value, the third total power consumption value, and the safety factor, and greater than or equal to the sum of the first total power consumption value, the second total power consumption value, and the safety factor, the smart breaker connected with the third-level load is controlled to be opened, so that the energy storage device supplies power to the first-level load and the second-level load. In the case of the current maximum output power value being less than the sum of the first total power consumption value, the second total power consumption value, the third total power consumption value, and the safety factor, and greater than or equal to the sum of the first total power consumption value, the second total power consumption value, and the safety factor, the smart breaker connected with the third-level load is controlled to be opened, so that the energy storage device supplies power to the first-level load and the second-level load. In a case where the current maximum output power value is less than the sum of the first total power value, the second total power value and the safety factor, and greater than or equal to the sum of the first total power value and the safety factor, the intelligent circuit breaker connected with the third-level load is controlled to be disconnected, and the intelligent circuit breaker connected with the second-level load is controlled to be disconnected, so that the energy storage device supplies power to the first-level load.

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