Dormancy and wake-up control method, device and system for energy storage equipment, and medium

Abstract

The invention discloses a sleep and wake-up control method and device of energy storage equipment, a medium and a system, and relates to the field of energy storage equipment. The control method comprises the following steps: acquiring a first photovoltaic voltage of a photovoltaic input interface and a first output current of an alternating current output interface when the energy storage equipment is in a working state; judging whether the energy storage equipment stops photovoltaic input or not according to the first photovoltaic voltage; judging whether the energy storage equipment stops alternating current output or not according to the first output current; under the condition that the energy storage equipment stops photovoltaic input and stops alternating current output, the energy storage equipment is controlled to enter a dormant state from a working state; wherein under the condition that the energy storage equipment is in the dormant state, the inverter is turned off. Therefore, the operation time of the inverter and other power consumption parts in the no-load working state can be shortened, and the self power consumption of the energy storage equipment can be remarkably reduced.

Description

Technical Field

[0001] The present application relates to the field of energy storage devices, and specifically to a method, device, medium, and system for controlling sleep and wake-up of energy storage devices. Background Art

[0002] The Balcony PV Energy Storage System is a plug-and-play clean energy solution designed specifically for apartment balconies, small courtyards, and window sills. It integrates photovoltaic power generation and battery backup in a simple box, enabling families to achieve energy independence and electricity safety.

[0003] However, currently available balcony photovoltaic energy storage systems consume significant power even when not in use. While not required to power the load, balcony energy storage systems still consume considerable power. Consequently, after a period of inactivity, users will notice a significant drop in their battery life. This not only wastes energy but, more importantly, creates a negative user experience. Summary of the Invention

[0004] The purpose of the embodiments of the present application is to provide a sleep and wake-up control method, device, medium and system for energy storage equipment, which can solve the pain point of large nighttime loss of energy storage equipment and can timely guarantee the user's electricity demand.

[0005] In a first aspect, the present application provides a sleep and wake-up control method for an energy storage device, wherein the energy storage device includes an inverter, a photovoltaic (PV) input interface, and an alternating current (AC) output interface. The sleep and wake-up control method for the energy storage device includes:

[0006] When the energy storage device is in a working state, obtaining a first photovoltaic voltage of the PV input interface and a first output current of the AC output interface;

[0007] determining whether the energy storage device stops photovoltaic input according to the first photovoltaic voltage;

[0008] determining whether the energy storage device stops outputting AC power according to the first output current;

[0009] When the energy storage device stops photovoltaic input and stops AC power output, the energy storage device is controlled to enter a dormant state from a working state; wherein, when the energy storage device is in the dormant state, the inverter is turned off;

[0010] When the energy storage device is in a dormant state, obtaining a second photovoltaic voltage of the PV input interface;

[0011] When the second photovoltaic voltage meets the photovoltaic awakening triggering condition, the energy storage device is controlled to enter the working state from the dormant state; wherein, when the energy storage device is in the working state, the inverter is turned on.

[0012] In the above technical solution, the energy storage device enters a dormant state and shuts down the inverter when it is not needed for power conversion and output. This reduces the operating time of power-consuming components such as the inverter in a no-load state, significantly reducing the energy storage device's self-consumption and improving the energy efficiency of the entire energy storage device.

[0013] In some technical solutions, the energy storage device may optionally further include a communication module for receiving a load wake-up instruction; wherein the sleep and wake-up control method of the energy storage device may further include:

[0014] When the energy storage device is in a dormant state, in response to a load wake-up instruction, the energy storage device is controlled to enter a working state from the dormant state.

[0015] In this way, users can force the energy storage device to wake up and restore power supply to ensure the user's electricity needs.

[0016] In some technical solutions, optionally, determining whether to stop photovoltaic input from the energy storage device based on the first photovoltaic voltage specifically includes determining that the energy storage device stops photovoltaic input when the first photovoltaic voltage is lower than a first voltage threshold and the duration of the voltage drop is greater than a first duration threshold. This can improve the accuracy of the determination.

[0017] In some technical solutions, the method for controlling the dormancy and awakening of an energy storage device may optionally further include: obtaining a system timing of the energy storage device; and determining whether the energy storage device should stop photovoltaic input when the system timing meets a preset time window. This can further improve the accuracy of the determination.

[0018] In some technical solutions, optionally, determining whether the energy storage device has stopped outputting AC power based on the first output current specifically includes determining that the energy storage device has stopped outputting AC power when the first output current is lower than a first current threshold and the duration of the current is greater than a second duration threshold. This can improve the accuracy of the determination.

[0019] In some technical solutions, the photovoltaic wake-up triggering condition optionally includes at least one of the following: the second photovoltaic voltage is greater than a second voltage threshold and the duration is greater than a third duration threshold; the second photovoltaic voltage is greater than a third voltage threshold, and the third voltage threshold is greater than the second voltage threshold. This can improve the accuracy of the judgment.

[0020] In some technical solutions, the energy storage device may optionally further include a battery management system, wherein the method for controlling the dormancy and wakeup of the energy storage device further includes: reducing the power consumption of the battery management system when the energy storage device is in a dormant state. This can further reduce the self-consumption of the energy storage device.

[0021] In some technical solutions, the battery management system optionally includes a control unit (MCU) and a sampling circuit. When the energy storage device is in a dormant state, reducing the power consumption of the battery management system specifically includes controlling the MCU to enter a dormant state while maintaining the sampling circuit. This reduces the energy storage device's self-consumption while enabling detection of the device's status.

[0022] In some technical solutions, the energy storage device may optionally include an energy management system, wherein the method for controlling the dormancy and wakeup of the energy storage device further includes reducing the power consumption of the energy management system when the energy storage device is in a dormant state. This can further reduce the self-consumption of the energy storage device.

[0023] In some technical solutions, the energy storage device may optionally further include a photovoltaic voltage detection circuit for obtaining a second photovoltaic voltage from the PV input interface when the energy storage device is in a dormant state, thereby reducing the self-consumption of the energy storage device.

[0024] In some technical solutions, the energy storage device optionally further includes a load current detection circuit configured to obtain a second output current of the AC output interface when the energy storage device is in a dormant state. The dormancy and wakeup control method for the energy storage device further includes controlling the energy storage device to enter an active state from the dormant state when the second output current is greater than a second current threshold. This can reduce the self-consumption of the energy storage device.

[0025] In some technical solutions, the AC output interface can optionally be a grid-connected interface, used to supply power to both the grid and the load. Thus, the AC output interface has dual power supply functions: it can both deliver power to the grid for energy feedback and sharing, and also provide power to the load to meet its power needs.

[0026] In some technical solutions, optionally, when the energy storage device stops photovoltaic input, before detecting the first output current of the AC output interface, the method for controlling the energy storage device to sleep and wake up further includes: controlling the energy storage device to disable a grid-connected function and stop supplying power to the grid. This ensures that the detected output current is output to the load.

[0027] In some technical solutions, the AC output interface optionally includes a first interface and a second interface. The first interface is a load direct connection interface for connecting to the load; the second interface is a grid-connected interface for connecting to the grid and the load power branch. Through these two interfaces, the AC output interface not only meets the power needs of the local load but also achieves grid connection.

[0028] In some technical solutions, the energy storage device optionally further includes a main controller and a battery management system. The method for controlling the dormancy and wakeup of the energy storage device further includes: when the energy storage device is in a dormant state, responding to a wakeup signal, waking up the main controller and the battery management system to perform a self-check; and when it is determined that there is no effective photovoltaic voltage and no load power demand, controlling the energy storage device to enter a dormant state again and / or reporting self-check information. This ensures the normal operation of the energy storage device.

[0029] In some technical solutions, the energy storage device may optionally include a timer that generates a wake-up signal at a preset period. This periodic wake-up detection method can effectively prevent the energy storage device from "sleeping".

[0030] In some technical solutions, the method for controlling the dormancy and awakening of an energy storage device may optionally further include: displaying the current state of the energy storage device; and / or displaying the amount of power saved or the percentage of power loss reduced by the energy storage device in the dormant state. This facilitates the user to understand the working status of the energy storage device at any time.

[0031] In a second aspect, the present application provides a control device for an energy storage device, which is configured to implement the sleep and wake-up control method for the energy storage device provided in the first aspect of the present application. The control device for the energy storage device includes: an acquisition module, which is used to acquire a first photovoltaic voltage and a first output current of the energy storage device when the energy storage device is in a working state; a first judgment module, which is used to judge whether the energy storage device stops photovoltaic input based on the first photovoltaic voltage; a second judgment module, which is used to judge whether the energy storage device stops AC output based on the first output current; a control module, which is used to control the energy storage device to enter a sleep state from a working state when the energy storage device stops photovoltaic input and stops AC output; wherein, when the energy storage device is in a sleep state, the inverter is turned off; wherein, the acquisition module is also used to acquire a second photovoltaic voltage of the PV input interface when the energy storage device is in a sleep state; the control module is also used to control the energy storage device to enter a working state from a sleep state when the second photovoltaic voltage meets the trigger condition for photovoltaic wake-up; wherein, when the energy storage device is in a working state, the inverter is turned on.

[0032] In the above technical solutions, the control device of the energy storage device can implement the sleep and wake-up control method of the energy storage device provided by any of the above technical solutions. Therefore, the control device of the energy storage device has all the beneficial effects of any of the above technical solutions, which will not be repeated here.

[0033] In a third aspect, the present application provides a computer-readable storage medium storing computer-executable instructions for causing a computer to execute the method for controlling the sleep and wakeup of an energy storage device as provided in the first aspect of the present application. Thus, the computer-readable storage medium has all the beneficial effects of any of the aforementioned technical solutions and will not be further elaborated upon here.

[0034] In a fourth aspect, the present application provides an energy storage system comprising: an energy storage device; a photovoltaic system connected to the energy storage device; and a control device for the energy storage device as provided in the second aspect of the present application, configured to control the energy storage device to enter a dormant state or an active state. Thus, the energy storage system has all the beneficial effects of any of the aforementioned technical solutions and will not be further elaborated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 This is one of the flow charts of the sleep and wake-up control method of the energy storage device provided in the embodiment of the present application;

[0036] Figure 2 This is a second flow chart of the sleep and wake-up control method of the energy storage device provided in an embodiment of the present application;

[0037] Figure 3 This is one of the structural diagrams of the energy storage system provided in the embodiment of the present application;

[0038] Figure 4 This is the second structural diagram of the energy storage system provided in the embodiment of the present application;

[0039] Figure 5 This is the third structural diagram of the energy storage system provided in the embodiment of the present application;

[0040] Figure 6 This is the fourth structural diagram of the energy storage system provided in the embodiment of the present application;

[0041] Figure 7 This is the fifth structural diagram of the energy storage system provided in the embodiment of the present application;

[0042] Figure 8 is a schematic structural diagram of the energy storage device provided in an embodiment of the present application;

[0043] Figure 9 This is a schematic diagram of the structure of the battery management system provided in an embodiment of the present application;

[0044] Figure 10 It is a structural diagram of the control device of the energy storage device provided in an embodiment of the present application.

[0045] in, Figures 3 to 10 The corresponding relationship between the reference numerals and component names is as follows:

[0046] 300 energy storage device control device; 301 acquisition module; 302 first judgment module; 303 second judgment module; 304 control module;

[0047] 410 Energy storage device; 411 Inverter; 412 Battery management system; 4121 Control unit; 4122 Sampling circuit; 413 Energy management system; 414 Battery module; 415 Photovoltaic voltage detection circuit; 416 Load current detection circuit; 417 AC output interface; 4171 First interface; 4172 Second interface; 418 PV input interface; 419 Main controller; 420 Photovoltaic system; 430 Load; 440 Smart socket; 450 Energy storage device charging pack; 460 Communication module; 470 Timer;

[0048] 500 power grid. DETAILED DESCRIPTION

[0049] The following will be combined with the accompanying drawings in the embodiments of the present application to clearly describe the technical solutions in the embodiments of the present application. Obviously, the embodiments described are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field are within the scope of protection of this application.

[0050] The terms "first," "second," and the like in the specification and claims of this application are used to distinguish similar objects, and are not used to describe a specific order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate, so that the embodiments of this application can be implemented in an order other than that illustrated or described herein, and that the objects distinguished by "first," "second," and the like are generally of the same type, and do not limit the number of objects; for example, the first object can be one or more. In addition, the term "and / or" in the specification and claims refers to at least one of the connected objects, and the character " / " generally indicates that the objects connected are in an "or" relationship.

[0051] The following combination Figures 1 to 10 , through specific embodiments and their application scenarios, a sleep and wake-up control method, device, medium and system for an energy storage device provided in an embodiment of the present application are described in detail.

[0052] Reference Figure 1 In some embodiments, the present application provides a method for controlling sleep and wake-up of an energy storage device, including:

[0053] S100, when the energy storage device is in an operating state, obtaining a first photovoltaic voltage of a PV input interface and a first output current of an AC output interface;

[0054] S102, determining whether the energy storage device stops photovoltaic input based on the first photovoltaic voltage;

[0055] S104, determining whether the energy storage device stops outputting AC power based on the first output current;

[0056] S106, when the energy storage device stops photovoltaic input and stops AC output, controlling the energy storage device to enter a dormant state from a working state; wherein, when the energy storage device is in the dormant state, the inverter is turned off;

[0057] S108, when the energy storage device is in a dormant state, obtaining a second photovoltaic voltage of the PV input interface;

[0058] S110 , when the second photovoltaic voltage meets the photovoltaic wake-up triggering condition, controlling the energy storage device to enter the working state from the dormant state; wherein, when the energy storage device is in the working state, the inverter is turned on.

[0059] In the above embodiment, the energy storage device includes an inverter, a PV (Photovoltaic) input interface, and an AC (Alternating Current) output interface. Among them, the PV input interface is used to connect the photovoltaic system and the energy storage device, and is used to introduce the electric energy generated by the photovoltaic system into the energy storage device. The AC output interface is used to connect the power grid and the load, so as to transmit the alternating current converted by the energy storage device to the power grid and the load to realize the supply and distribution of electric energy. The inverter is one of the core components of the energy storage device. It undertakes the important task of converting direct current into alternating current and is a major power consumer of the energy storage device.

[0060] Therefore, in this embodiment, when the energy storage device is in an operating state, it is determined whether the energy storage device has stopped photovoltaic input (i.e., the energy storage device does not need to perform power conversion) based on the first photovoltaic voltage of the PV input interface, and it is determined whether the energy storage device has stopped AC output (the load has no power demand) based on the AC output current; thereby, when the energy storage device stops photovoltaic input and stops AC output, the energy storage device is controlled to enter a dormant state from an operating state; wherein, when the energy storage device is in a dormant state, the inverter is turned off. By causing the energy storage device to enter a dormant state and turning off the inverter when it does not need to perform power conversion and output, the operating time of power-consuming components such as the inverter in a no-load operating state can be reduced, thereby significantly reducing the self-consumption of the energy storage device and improving the energy utilization efficiency of the entire energy storage device.

[0061] Furthermore, when the energy storage device is in a dormant state, if the second photovoltaic voltage at the PV input interface meets the photovoltaic wake-up trigger condition, indicating that the photovoltaic system has begun to generate sufficient power, the energy storage device is controlled to enter an active state from the dormant state. Furthermore, when the energy storage device is in an active state, the inverter is turned on. This allows the energy storage device to promptly convert the DC power generated by the photovoltaic system into AC power, thus avoiding waste of photovoltaic power.

[0062] In some embodiments, the energy storage device further includes a communication module, the communication module being configured to receive a load wake-up instruction. The method for controlling the dormancy and wake-up of the energy storage device further includes:

[0063] When the energy storage device is in a dormant state, in response to a load wake-up instruction, the energy storage device is controlled to enter a working state from the dormant state.

[0064] In practical applications, when encountering emergencies, critical loads such as refrigerators, lighting equipment, and network equipment need to be quickly restored to power. In this case, users can use terminal devices such as mobile apps to send load wake-up commands to the communication module of the energy storage device, forcing the energy storage device to wake up and restore power to meet the user's power needs.

[0065] It is understandable that the communication module may be a Bluetooth module or a wireless module, etc.

[0066] In some embodiments, determining whether the energy storage device stops photovoltaic input according to the first photovoltaic voltage specifically includes:

[0067] When the first photovoltaic voltage is lower than the first voltage threshold and the duration thereof is longer than the first duration threshold, it is determined that the energy storage device stops photovoltaic input.

[0068] In the above embodiment, a first voltage threshold is set. When the first photovoltaic belt voltage falls below the first voltage threshold, it indicates that the photovoltaic system is no longer generating sufficient electricity. However, if this is used as a direct indicator to determine whether the energy storage device should stop photovoltaic input, short-term voltage fluctuations may lead to misjudgment, resulting in state fluctuations. Therefore, in this embodiment, by adding a condition that the duration of the state exceeds the first duration threshold, the energy storage device is determined to have stopped photovoltaic input only when the first photovoltaic voltage has been below the threshold for a period of time. This effectively avoids such misjudgments and improves the accuracy of the judgment.

[0069] In practical applications, the setting of the first voltage threshold and the first duration threshold needs to take into account a variety of factors, such as the performance of the photovoltaic system, local lighting conditions, and the operating requirements of the energy storage device. If the threshold is set unreasonably, the judgment result will be inaccurate. For example, if the first voltage threshold is set too high, it may be determined to stop the photovoltaic input when the photovoltaic system can still provide sufficient power; if it is set too low, it may not be possible to make a timely judgment even after the photovoltaic system can no longer provide sufficient power. If the first duration threshold is set too short, it may cause misjudgment due to short-term voltage fluctuations; if it is set too long, it may cause the energy storage device to fail to respond to the cessation of photovoltaic input in a timely manner, affecting the efficiency of the system.

[0070] In some embodiments, determining whether the energy storage device stops outputting AC power according to the first output current specifically includes:

[0071] When the first output current is lower than the first current threshold and the duration is longer than the second duration threshold, it is determined that the energy storage device stops outputting AC power.

[0072] In the above embodiment, a first current threshold is set. When the first output current of the AC output interface is lower than the first current threshold, it indicates that the energy storage device has terminated discharge, that is, the load has no power demand. However, if this is used to directly determine that the energy storage device has stopped outputting current, a misjudgment may occur due to short-term current fluctuations, resulting in state oscillation. Therefore, in this embodiment, by adding a condition that the duration is greater than the second duration threshold, the energy storage device is judged to have stopped outputting AC power only when the state of the first output current being lower than the threshold continues for a period of time. This can effectively avoid such misjudgments and improve the accuracy of the judgment.

[0073] In practical applications, the setting of the first current threshold and the second time threshold needs to consider a variety of factors, such as the discharge characteristics of the energy storage device, the normal operating current range of the load, and other factors. For example, different types of energy storage devices (such as lithium batteries, lead-acid batteries, etc.) have different discharge characteristics, including discharge curves, maximum discharge currents, etc. The appropriate current threshold is determined according to the specific parameters of the energy storage device to ensure that it can be detected in time when the discharge capacity of the energy storage device drops to a certain level. Understanding the normal operating current range and peak current requirements of the load can ensure that the first current threshold is set reasonably, and neither the termination of the energy storage device discharge can be detected in time due to the threshold being too high, nor frequent misjudgments will be caused due to the threshold being too low.

[0074] In some embodiments, the photovoltaic wake-up triggering condition includes at least one of the following:

[0075] The second photovoltaic voltage is greater than the second voltage threshold and the duration thereof is greater than the third duration threshold;

[0076] The second photovoltaic voltage is greater than a third voltage threshold, and the third voltage threshold is greater than the second voltage threshold.

[0077] In the above embodiment, the second voltage threshold is a baseline voltage limit. When the second photovoltaic voltage exceeds the second voltage threshold, it indicates that the photovoltaic system is in a relatively high power output state. At this point, the energy storage device can be awakened to perform power conversion. However, if this is used as a condition to directly awaken the energy storage device, transient fluctuations in the photovoltaic system voltage due to factors such as changes in light intensity may occur, leading to misjudgments. Therefore, in this embodiment, by adding a condition that the duration of the voltage exceeds the third duration threshold, these transient fluctuations can be filtered out. Only when the voltage has steadily exceeded the second voltage threshold for a period of time is it considered to be in a high voltage state. This prevents subsequent operations from being falsely triggered by brief voltage spikes, thereby helping to improve system stability and reliability. Furthermore, a third voltage threshold is provided, and the third voltage threshold is greater than the second voltage threshold, forming a voltage tiered judgment mechanism. Only when the second photovoltaic voltage exceeds the third voltage threshold does it indicate that the photovoltaic system is at a higher voltage level. This also prevents subsequent operations from being falsely triggered by brief voltage spikes, thereby helping to improve system stability and reliability.

[0078] Reference Figure 2 In some embodiments, the sleep and wake-up control method of the energy storage device further includes:

[0079] S200, obtaining a system timing of an energy storage device;

[0080] S202 : When the system timing meets the preset time window, it is determined that the energy storage device stops photovoltaic input.

[0081] In practical applications, the power generation of a photovoltaic system depends on sunlight conditions. Lighting conditions are affected by factors such as geographic location, season, and time of day. Therefore, a time window associated with the sunlight conditions is set. When the energy storage device's system timing falls within this time window, it indicates that the energy storage device can no longer generate sufficient electricity. At this point, the energy storage device can be judged to stop photovoltaic input.

[0082] It is understandable that when setting the time window, it can be set according to local lighting patterns, seasons, and weather conditions. For example, areas near the equator have relatively stable and long sunlight hours throughout the year, while high-latitude areas have long sunlight hours in the summer and short sunlight hours in the winter. Therefore, by understanding the local lighting patterns, it is possible to accurately determine the periods of sufficient and insufficient sunlight. In the summer, the period of sufficient sunlight may last from 7 am to 7 pm, so a time window from 7 am to 7 pm can be set for photovoltaic power generation; in the winter, the period of sufficient sunlight may only be from 9 am to 3 pm, and the time window is adjusted accordingly to 9 am to 3 pm. In addition, weather conditions can also affect lighting conditions. For example, in thunderstorms in the summer or snowy weather in the winter, lighting conditions can suddenly deteriorate. Therefore, by setting the time window based on a comprehensive consideration of local lighting patterns, seasons, and weather conditions, the accuracy of judgments can be effectively improved.

[0083] Reference Figure 8 and Figure 9 In some embodiments, the energy storage device further includes a battery management system (BMS). The sleep and wake-up control method of the energy storage device further includes:

[0084] When the energy storage device is in sleep mode, the power consumption of the battery management system is reduced.

[0085] In the above embodiment, the battery management system also consumes power when the energy storage device is in the dormant state. Therefore, by reducing the power consumption of the battery management system, the energy loss of the energy storage device in the dormant state can be reduced.

[0086] In the above embodiment, the battery management system includes a control unit (MCU) and a sampling circuit. When the energy storage device is in a dormant state, reducing the power consumption of the battery management system specifically includes:

[0087] The control unit (MCU) enters a sleep state, and the sampling circuit keeps working.

[0088] In actual applications, when the energy storage device is dormant, the core MCU of the battery management system enters deep sleep mode, but it retains basic passive monitoring and independent, ultra-low-power sampling circuits (voltage and temperature sampling circuits, such as using dedicated low-power comparators or ADCs (Analog-to-Digital Converters)). This ensures that critical safety monitoring is not interrupted and continuously monitors the total voltage and temperature of the energy storage device. Once a safety threshold (such as overvoltage, undervoltage, or overtemperature) is reached, the entire device is immediately forced to wake up and an alarm is issued.

[0089] In some embodiments, the energy storage device further includes an energy management system (EMS). The sleep and wake-up control method of the energy storage device further includes:

[0090] When the energy storage device is in sleep mode, the power consumption of the energy management system is reduced.

[0091] In the above embodiment, the energy management system also consumes power when the energy storage device is in the dormant state. Therefore, by reducing the power consumption of the energy management system, the energy loss of the energy storage device in the dormant state can be reduced.

[0092] In some embodiments, the energy storage device further includes a photovoltaic voltage detection circuit for obtaining a second photovoltaic voltage of the PV input interface when the energy storage device is in a dormant state.

[0093] In the above embodiment, by providing an independent photovoltaic voltage detection circuit, the second photovoltaic voltage at the PV input interface can be continuously and accurately acquired, thereby providing accurate data support for subsequent judgments and decisions. Furthermore, the independent photovoltaic voltage detection circuit can adopt a low-power design. When the energy storage device is in a dormant state, its power consumption is extremely low and does not significantly affect the overall power consumption of the energy storage device, thereby ensuring the low energy consumption characteristics of the energy storage device in the dormant state.

[0094] In some embodiments, the energy storage device further includes a load current detection circuit for obtaining a second output current of the AC output interface when the energy storage device is in a dormant state; wherein the dormancy and wakeup control method of the energy storage device further includes:

[0095] When the second output current is greater than the second current threshold, the energy storage device is controlled to enter the working state from the dormant state.

[0096] In the above embodiment, by providing an independent load current detection circuit, the second output current of the AV output interface can be continuously and accurately obtained, thereby providing accurate data support for subsequent judgment and decision-making. Furthermore, the independent load current detection circuit can adopt a low-power design. When the energy storage device is in the dormant state, its power consumption is extremely low and does not significantly affect the overall power consumption of the energy storage device, thereby ensuring the low energy consumption characteristics of the energy storage device in the dormant state.

[0097] Reference Figure 3 In some embodiments, the AC output interface is a grid-connected interface used to supply power to the grid and to loads. This means the AC output interface has dual power supply capabilities: it can deliver power to the grid for energy feedback and sharing, and it can also provide power to loads to meet their power needs.

[0098] In the above embodiment, when the energy storage device stops photovoltaic input, before detecting the first output current of the AC output interface, the sleep and wake-up control method of the energy storage device further includes:

[0099] Control the energy storage device to shut down the grid-connected function and stop supplying power to the grid.

[0100] In actual applications, the AC output interface has dual power supply functions, allowing it to both deliver electricity to the grid for energy feedback and sharing, and also provide power to loads to meet their electricity needs. Therefore, after photovoltaic power generation ceases, the energy storage device does not need to deliver its stored electricity to the grid. Therefore, by disabling the energy storage device's grid-connection function and stopping power supply to the grid, the power output from the AC output interface can only be delivered to the load. Therefore, by detecting the output current of the AC output interface, it can be determined that the energy storage device has stopped outputting AC power (the load has no electricity demand).

[0101] Reference Figure 6 In some embodiments, the AC output interface includes a first interface and a second interface. The first interface is a load direct connection interface for connecting to a load, and the second interface is a grid-connected interface for connecting to the grid and the load power branch. In other words, through these two interfaces, the AC output interface not only meets the power needs of the local load but also enables grid connection.

[0102] In some embodiments, the energy storage device further includes a main controller and a battery management system; the sleep and wake-up control method of the energy storage device further includes:

[0103] When the energy storage device is in a dormant state, in response to a wake-up signal, the main controller and the battery management system are awakened to perform a status self-check. When it is determined that there is no effective photovoltaic voltage and no load power demand, the energy storage device is controlled to enter the dormant state again and / or report self-check information.

[0104] In the above embodiment, the main controller serves as the core control unit of the energy storage device, responsible for coordinating the work of various components and executing various control strategies; the battery management system focuses on real-time monitoring, management and protection of the status of the energy storage battery to ensure the safe and stable operation of the battery. When the energy storage device is in a dormant state, that is, in a low-power operation mode, it only maintains basic monitoring functions to wait for the wake-up signal. Once the wake-up signal is received (the wake-up signal may come from an external timing trigger, a remote command, or the device itself detects that certain specific conditions are met and is triggered), the energy storage device will immediately wake up the main controller and the battery management system and perform a status self-check (such as voltage, current, temperature, remaining power (SOC, State of Charge), log recording and time synchronization, etc.). When it is determined that there is no effective photovoltaic voltage and no load power demand, the energy storage device is controlled to enter the dormant state again. Furthermore, you can also try to briefly connect to the network and report the self-check status information to the cloud / APP to let the user know that the device is online.

[0105] Reference Figure 8 In some embodiments, the energy storage device further includes a timer, which is used to generate a wake-up signal according to a preset period. This periodic wake-up detection method can effectively prevent the energy storage device from "sleeping to death". "Sleeping to death" means that during the dormant process, the device is unable to respond normally to the external wake-up signal due to some unknown faults or abnormal conditions, and thus remains in a dormant state and cannot resume work. The periodic wake-up mechanism of the timer can ensure that the energy storage device is regularly awakened and self-checked to detect potential problems in a timely manner. If a fault or abnormality is found in the device during the self-check process, corresponding measures can be taken according to the preset fault handling strategy, such as issuing an alarm message, recording a fault log, and attempting automatic repair.

[0106] In practical applications, the timer may adopt an ultra-low power consumption RTC (Real-Time Clock).

[0107] In some embodiments, the energy storage device further includes a visual human-computer interaction interface; wherein the sleep and wake-up control method of the energy storage device further includes:

[0108] Display the current status of the energy storage device; and / or

[0109] Displays the power saved or loss percentage reduced when the energy storage device is in sleep state.

[0110] In the above embodiment, the visual human-computer interaction interface can provide an extremely low-power indicator light (such as an LED, a breathing light) to indicate the sleep state (such as slow flashing), and display the amount of power saved / loss percentage reduced during sleep. On the one hand, through clear and intuitive display, users can understand the working status of the energy storage device at any time, which is convenient for reasonable energy management and scheduling. On the other hand, the interface can also display the amount of power saved or the percentage of loss reduced by the energy storage device in the sleep state. This function enables users to intuitively see the energy-saving effect brought about by the sleep control strategy, which helps users evaluate the actual benefits of the sleep and wake-up control method, and thus optimize and adjust the control strategy according to actual needs.

[0111] In practical applications, when the energy storage device is in a dormant state, the power supply to the visual human-computer interaction interface can be completely cut off, leaving only the indicator light indicating that the device has entered the dormant state, thereby reducing power consumption.

[0112] Reference Figure 10 In some embodiments, the present application further provides a control device 300 for an energy storage device, comprising: an acquisition module 301 , a first judgment module 302 , a second judgment module 303 and a control module 304 .

[0113] The acquisition module 301 is used to acquire the first photovoltaic voltage and the first output current of the energy storage device when the energy storage device is in the working state; the first judgment module 302 is used to judge whether the energy storage device has stopped photovoltaic input based on the first photovoltaic voltage; the second judgment module 303 is used to judge whether the energy storage device has stopped AC output based on the first output current; the control module 304 is used to control the energy storage device to enter the dormant state from the working state when the energy storage device stops photovoltaic input and stops AC output; wherein, when the energy storage device is in the dormant state, the inverter is turned off. The acquisition module 301 is also used to acquire the second photovoltaic voltage of the PV input interface when the energy storage device is in the dormant state; the control module 304 is also used to control the energy storage device to enter the working state from the dormant state when the second photovoltaic voltage meets the photovoltaic wake-up trigger condition; wherein, when the energy storage device is in the working state, the inverter is turned on.

[0114] The control device 300 for the energy storage device provided in this embodiment can implement the sleep and wake-up control method for the energy storage device provided in any of the above embodiments, and therefore has all the beneficial effects of any of the above embodiments, which will not be described in detail here.

[0115] In some embodiments, the present application also provides a computer-readable storage medium, which stores computer-executable instructions. The computer-executable instructions are used to enable a computer to execute the sleep and wake-up control method of the energy storage device provided in any of the above embodiments, and can achieve the same technical effect. To avoid repetition, they will not be repeated here.

[0116] Reference Figures 3 to 7 In some embodiments, the present application further provides an energy storage system, which includes an energy storage device 410, a photovoltaic system 420, a load 430, and a control device 300 for the energy storage device provided in any of the above embodiments.

[0117] Specifically, a photovoltaic system 420 is connected to an energy storage device 410 to directly convert solar energy into DC power. This power is then transmitted to the energy storage device 410. A load 430 is connected to the energy storage device 410. The energy storage device control device 300 is used to control the energy storage device 410 to enter a dormant state or an active state.

[0118] The energy storage system has the control device 300 of the energy storage device provided by any of the above embodiments and can achieve the same effect. To avoid repetition, it will not be described here.

[0119] In some embodiments, the energy storage device 410 includes an inverter 411 , a battery management system (BMS) 412 , an energy management system (EMS) 413 , and a battery module 414 .

[0120] Specifically, the battery module 414 is the energy storage unit of the energy storage device 410. The inverter 411 is the core component of the energy storage device 410 that realizes the conversion of electric energy. The battery management system 412 is a key system to ensure the safe and reliable operation of the battery module 414. It monitors the voltage, current, temperature and other key parameters of each battery cell in the battery module 414 in real time. By analyzing and processing this data, it realizes functions such as battery charge and discharge management, balancing control, fault diagnosis and protection. The energy management system 413 is the "brain" of the energy storage device 410 and is responsible for the energy scheduling and optimization management of the entire energy storage system. It obtains real-time information on energy generation, storage and consumption by communicating with the inverter 411, the battery management system 412 and external devices (such as photovoltaic systems, power grids, loads, etc.). Based on this information, the energy management system 413 will formulate a better energy scheduling plan according to preset strategies and algorithms.

[0121] In the above embodiment, when the energy storage device 410 stops photovoltaic input and stops AC power output, the control device 300 of the energy storage device controls the inverter 411 to shut down and reduces the power consumption of the battery management system 412 and the energy management system 413. In this way, the self-consumption of the energy storage device can be reduced.

[0122] Reference Figure 9 In actual applications, the battery management system 412 includes a control unit 4121 and a sampling circuit 4122. When the energy storage device 410 is dormant, the core MCU of the battery management system 412 enters a deep sleep mode, but retains basic passive monitoring. The independent, ultra-low-power sampling circuit 4122 (voltage and temperature sampling circuits, such as using dedicated low-power comparators or ADCs (Analog-to-Digital Converters)) ensures that critical safety monitoring is not interrupted and continuously monitors the total voltage and temperature of the energy storage device. Once a safety threshold (such as overvoltage, undervoltage, or overtemperature) is reached, the entire device is immediately forced to wake up and an alarm is issued.

[0123] Reference Figure 3 and Figure 7 In some embodiments, the energy storage device 410 further includes a photovoltaic voltage detection circuit 415 and a load current detection circuit 416. The photovoltaic voltage detection circuit 415 is configured to obtain a second photovoltaic voltage from the PV input interface 418 when the energy storage device 410 is in a dormant state, and the load current detection circuit 416 is configured to obtain a second output current from the AC output interface 417 when the energy storage device is in a dormant state.

[0124] Reference Figure 5 In some embodiments, the load 430 is connected via the smart socket 440 and the AC output interface 417 .

[0125] In actual applications, after the energy storage device 410 enters the dormant state, its AC output interface 417 will not actively output AC power to the load 430. At this time, if the load 430 needs power, it will first be powered by the mains. After the load 430 is powered by the mains, its smart socket 440 will detect the AC power (from the mains) and send a load power demand instruction to the energy storage device 410. After receiving the instruction, the energy storage device 410 will wake up and enter the working state to power the load 430.

[0126] Reference Figures 4 to 6 In some embodiments, the energy storage system further includes a plurality of energy storage device power-up packs 450 , which are connected to the energy storage device 410 to achieve flexible expansion of system capacity.

[0127] In actual applications, the energy storage device power pack 450 includes a battery management system 412 and a battery module 414 .

[0128] Reference Figure 3 In some embodiments, the AC output interface 417 is a grid-connected interface for supplying power to the grid 500 and electrical loads.

[0129] In actual applications, because AC output interface 417 has dual power supply functions, it can not only transmit electrical energy to power grid 500 to achieve energy feedback and sharing, but also provide power to loads to meet the power needs of load 430. Therefore, after photovoltaic power generation stops, energy storage device 410 does not need to transmit its stored electricity to the power grid. Therefore, by disabling the grid connection function of energy storage device 410 and stopping power supply to power grid 500, the power output of AC output interface 417 can only be output to load 430. Therefore, by detecting the output current of AC output interface 417, it can be determined that energy storage device 410 has stopped outputting AC power (the load has no power demand).

[0130] Reference Figure 6 In some embodiments, AC output interface 417 includes a first interface 4171 and a second interface 4172. First interface 4171 is a load direct connection interface for connecting to load 430. Second interface 4172 is a grid-connected interface for connecting to grid 500 and the load power branch. In other words, through these two interfaces, AC output interface 417 not only meets the power needs of local loads but also enables grid connection to grid 500.

[0131] Reference Figure 8 In some embodiments, the energy storage device 410 further includes a main controller 419 and a timer 470 .

[0132] In the above embodiment, the main controller 419 serves as the core control unit of the energy storage device 410, responsible for coordinating the work of various components and executing various control strategies. When the energy storage device 410 is in a dormant state, that is, in a low-power operating mode, it only maintains basic monitoring functions to wait for a wake-up signal. Once a wake-up signal is received (the wake-up signal may come from an external timing trigger, a remote command, or the device itself detects that certain specific conditions are met and is triggered), the energy storage device 410 will immediately wake up the main controller 419 and the battery management system 412 to perform a status self-check (such as voltage, current, temperature, remaining power (SOC, State of Charge), log recording and time synchronization, etc.).

[0133] The timer 470 can generate a wake-up signal according to a preset period to periodically wake up the energy storage device 410 to avoid "sleeping".

[0134] In some embodiments, the energy storage device also includes a communication module 460. In practical applications, when an emergency occurs, critical loads such as refrigerators, lighting equipment, and network equipment require rapid power restoration. In this case, the user can use a terminal device such as a mobile app to send a load wake-up command to the energy storage device's communication module 460, forcing the energy storage device to wake up and restore power to meet the user's power needs.

[0135] It is understandable that the load wake-up instruction may also be automatically triggered by data detected by the energy storage device 410 itself.

[0136] It should be noted that, in this article, the terms "comprise", "include" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the statement "comprises a ..." does not exclude the presence of other identical elements in the process, method, article or device comprising the element. In addition, it should be noted that the scope of the methods and devices in the embodiments of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in the opposite order according to the functions involved. For example, the described method may be performed in an order different from that described, and various steps may also be added, omitted, or combined. In addition, the features described with reference to certain examples may be combined in other examples.

[0137] Through the description of the above implementation methods, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of software plus the necessary general hardware platform, and of course can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of the present application, or the part that contributes to the prior art, can be embodied in the form of a computer software product, which is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk), and includes a number of instructions for enabling a terminal (which can be a mobile phone, computer, server, or network device, etc.) to execute the methods of each embodiment of the present application.

[0138] The embodiments of the present application are described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of this application, ordinary technicians in this field can also make many forms without departing from the purpose of this application and the scope of protection of the claims, all of which are within the protection of this application.

Claims

1. A method for controlling sleep and wake-up of an energy storage device, wherein: The energy storage device includes an inverter, a photovoltaic input interface, and an AC output interface, and is characterized in that the sleep and wake-up control method of the energy storage device includes: When the energy storage device is in a working state, obtaining a first photovoltaic voltage of the photovoltaic input interface and a first output current of the alternating current output interface; determining whether the energy storage device stops photovoltaic input according to the first photovoltaic voltage; determining whether the energy storage device stops outputting AC power according to the first output current; When the energy storage device stops photovoltaic input and stops AC output, controlling the energy storage device to enter a dormant state from the working state; wherein, when the energy storage device is in the dormant state, the inverter is turned off; When the energy storage device is in a dormant state, obtaining a second photovoltaic voltage of the photovoltaic input interface; When the second photovoltaic voltage meets the photovoltaic wake-up triggering condition, the energy storage device is controlled to enter the working state from the dormant state; wherein, when the energy storage device is in the working state, the inverter is turned on.

2. The method for controlling the sleep and wake-up of an energy storage device according to claim 1, wherein: The energy storage device further includes a communication module for receiving a load wake-up instruction; wherein the sleep and wake-up control method of the energy storage device further includes: When the energy storage device is in a dormant state, in response to the load wake-up instruction, the energy storage device is controlled to enter the working state from the dormant state.

3. The method for controlling the sleep and wake-up of an energy storage device according to claim 1, wherein: The step of determining whether the energy storage device stops photovoltaic input according to the first photovoltaic voltage specifically includes: When the first photovoltaic voltage is lower than a first voltage threshold and the duration thereof is longer than a first duration threshold, it is determined that the energy storage device stops photovoltaic input.

4. The method for controlling the dormancy and awakening of an energy storage device according to claim 3, wherein: The sleep and wake-up control method of the energy storage device further includes: Obtaining a system timing of the energy storage device; When the system timing meets the preset time window, it is determined that the energy storage device stops photovoltaic input.

5. The method for controlling the sleep and wake-up of an energy storage device according to claim 1, wherein: The step of determining whether the energy storage device stops outputting AC power according to the first output current specifically includes: When the first output current is lower than a first current threshold and the duration thereof is longer than a second duration threshold, it is determined that the energy storage device stops outputting alternating current.

6. The method for controlling the sleep and wake-up of an energy storage device according to claim 1, wherein: The photovoltaic wake-up triggering condition includes at least one of the following: The second photovoltaic voltage is greater than a second voltage threshold and lasts for a duration greater than a third duration threshold; The second photovoltaic voltage is greater than a third voltage threshold, and the third voltage threshold is greater than the second voltage threshold.

7. The method for controlling the dormancy and awakening of an energy storage device according to any one of claims 1 to 6, characterized in that: The energy storage device further includes a battery management system; wherein the sleep and wake-up control method of the energy storage device further includes: When the energy storage device is in a dormant state, the power consumption of the battery management system is reduced.

8. The method for controlling the sleep and wake-up of an energy storage device according to claim 7, wherein: The battery management system includes a control unit and a sampling circuit; wherein, when the energy storage device is in a dormant state, reducing the power consumption of the battery management system specifically includes: The control unit is controlled to enter a dormant state, and the sampling circuit keeps working.

9. The method for controlling the dormancy and awakening of an energy storage device according to any one of claims 1 to 6, characterized in that: The energy storage device further includes an energy management system; wherein the sleep and wake-up control method of the energy storage device further includes: When the energy storage device is in a dormant state, the power consumption of the energy management system is reduced.

10. The method for controlling the dormancy and awakening of an energy storage device according to any one of claims 1 to 6, characterized in that: The energy storage device further includes a photovoltaic voltage detection circuit, which is used to obtain a second photovoltaic voltage of the photovoltaic input interface when the energy storage device is in a dormant state.

11. The method for controlling the dormancy and awakening of an energy storage device according to any one of claims 1 to 6, characterized in that: The energy storage device further includes a load current detection circuit for obtaining a second output current of the AC power output interface when the energy storage device is in a dormant state; The sleep and wake-up control method of the energy storage device further includes: When the second output current is greater than a second current threshold, the energy storage device is controlled to enter the working state from the dormant state.

12. The method for controlling the dormancy and awakening of an energy storage device according to any one of claims 1 to 6, characterized in that: The AC power output interface is a grid-connected interface, used to supply power to the grid and loads.

13. The method for controlling the dormancy and awakening of an energy storage device according to claim 12, wherein: In the case where the energy storage device stops photovoltaic input, before detecting the first output current of the AC power output interface, the sleep and wake-up control method of the energy storage device further includes: Control the energy storage device to turn off the grid connection function and stop supplying power to the grid.

14. The method for controlling the dormancy and awakening of an energy storage device according to any one of claims 1 to 6, characterized in that: The AC power output interface includes a first interface and a second interface; The first interface is a load direct connection interface, used to connect to a load; The second interface is a grid-connected interface, which is used to connect the grid and the load power branch.

15. The method for controlling the dormancy and awakening of an energy storage device according to any one of claims 1 to 6, characterized in that: The energy storage device further includes a main controller and a battery management system; the sleep and wake-up control method of the energy storage device further includes: When the energy storage device is in a dormant state, in response to a wake-up signal, the main controller and the battery management system are awakened to perform a status self-check. When it is determined that there is no effective photovoltaic voltage and no load power demand, the energy storage device is controlled to enter a dormant state again and / or report self-check information.

16. The method for controlling the sleep and wake-up of an energy storage device according to claim 15, wherein: The energy storage device further includes a timer; the timer generates the wake-up signal according to a preset period.

17. The method for controlling the dormancy and awakening of an energy storage device according to any one of claims 1 to 6, characterized in that: The sleep and wake-up control method of the energy storage device further includes: Display the current status of the energy storage device; and / or The amount of power saved or the percentage of loss reduced by the energy storage device in a dormant state is displayed.

18. A control device for an energy storage device, characterized in that: The method for controlling the dormancy and awakening of an energy storage device according to any one of claims 1 to 17 is configured to be implemented, wherein the control device of the energy storage device comprises: an acquisition module, configured to acquire a first photovoltaic voltage and a first output current of the energy storage device when the energy storage device is in an operating state; a first judging module, configured to judge whether the energy storage device stops photovoltaic input according to the first photovoltaic voltage; a second judgment module, configured to judge whether the energy storage device stops outputting AC power according to the first output current; A control module, configured to control the energy storage device to enter a dormant state from the working state when the energy storage device stops photovoltaic input and stops AC power output; wherein, when the energy storage device is in the dormant state, the inverter is turned off; Wherein, the acquisition module is further used to acquire the second photovoltaic voltage of the photovoltaic input interface when the energy storage device is in a dormant state; The control module is further configured to control the energy storage device to enter the working state from the sleep state when the second photovoltaic voltage meets the photovoltaic wake-up triggering condition; wherein, when the energy storage device is in the working state, the inverter is turned on.

19. A computer-readable storage medium, characterized in that The computer-readable storage medium stores computer-executable instructions, and the computer-executable instructions are used to enable a computer to execute the steps of the sleep and wake-up control method for an energy storage device according to any one of claims 1 to 17.

20. An energy storage system, characterized in that: include: Energy storage equipment; A photovoltaic system connected to the energy storage device; The control device of the energy storage device according to claim 18 is used to control the energy storage device to enter a dormant state or an operating state.

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