Control method, energy storage inverter and readable storage medium

Abstract

The invention provides a control method, an energy storage inverter and a readable storage medium, and the control method comprises the steps: controlling a storage battery to enter a second state from a first state when the electric quantity of the storage battery is larger than a third threshold, so as to enable the storage battery to supply power to a load, and enabling the storage battery to enter the second state from the first state when the electric quantity of the storage battery is smaller than the first threshold; controlling the second state of the storage battery to enter the first state, so that the power supply charges the storage battery; wherein the first state is a charging state, and the second state is a discharging state. According to the technical scheme, after the electric quantity of the storage battery is larger than the third threshold, the storage battery can be controlled to be adjusted to be in the state of only supplying power to the load, and when the electric quantity of the storage battery is smaller than the first threshold, the storage battery is controlled to enter the charging state; and the problem of accelerated aging of the battery due to multiple cycles caused by frequent charging and discharging is solved.

Description

Technical Field

[0001] This application relates to the technical field of energy storage inverters, and particularly to a control method, an energy storage inverter, and a readable storage medium. Background Art

[0002] Currently, an energy storage inverter can realize the input of solar energy, the charge and discharge of battery energy storage, the energy interaction with the public grid, and the power supply to a load through at least 4 ports (photovoltaic, battery, public grid, load), supporting bidirectional energy flow to optimize energy utilization and management.

[0003] In the process of conceiving and implementing this application, the inventors found that there are at least the following problems: when the battery of an energy storage inverter is in use, it generally controls the battery to charge and discharge according to the battery's power level, and frequent charge and discharge will cause the battery to age faster due to multiple cycles.

[0004] The foregoing description is for general background information and does not necessarily constitute prior art. Summary of the Invention

[0005] In view of the above technical problems, this application provides a control method, an energy storage inverter, and a readable storage medium, making the use of the battery in the energy storage inverter more reasonable and avoiding the accelerated aging of the battery caused by frequent charge and discharge.

[0006] This application provides a control method, including the steps of:

[0007] S100. When the power level of the storage battery is greater than or equal to a third threshold, control the storage battery to switch from a first state to a second state so that the storage battery supplies power to the load; and / or,

[0008] S200. When the power level of the storage battery is less than or equal to a first threshold, control the storage battery to switch from a second state to a first state so that a power source charges the storage battery.

[0009] Optionally, the power source includes a first power source and a second power source.

[0010] Optionally, step S100 includes: when the power level of the storage battery is greater than or equal to a third threshold, control the storage battery to switch from a first state to a second state so that the storage battery and the second power source supply power to the load.

[0011] Optionally, step S200 includes: when the power level of the storage battery is less than or equal to a first threshold, control the storage battery to switch from a second state to a first state so that the first power source and / or the second power source charge the storage battery, and the first power source and / or the second power source supply power to the load.

[0012] Optionally, the control method further includes the steps of:

[0013] S300. When the power of the storage battery is greater than the second threshold and less than the third threshold, control the second power supply to charge the storage battery, and control the first power supply and / or the second power supply to supply power to the load.

[0014] Optionally, the priority of the second power supply to supply power to the load is greater than the priority of the storage battery to supply power to the load; and / or, the priority of the storage battery to supply power to the load is greater than the priority of the first power supply to supply power to the load.

[0015] Optionally, when it is monitored that the power supplied by the second power supply and / or the power supplied by the storage battery cannot meet the power consumption requirements of the load, control the second power supply and the first power supply to supply power to the load, or control the storage battery and the first power supply to supply power to the load, or control the second power supply, the storage battery and the first power supply to supply power to the load.

[0016] Optionally, when the storage battery is in the first state, convert the alternating current of the first power supply interface into direct current to charge the storage battery; or,

[0017] When the storage battery is in the second state, convert the direct current of the battery interface in the storage battery into alternating current to supply power to the load.

[0018] Optionally, when the first power supply is in a power shortage state, control the second power supply and / or the storage battery to supply power to the first power supply.

[0019] Optionally, the control method further includes:

[0020] In response to a user operation, control the storage battery in the first state to supply power to the load; or, control the power supply to charge the storage battery in the second state.

[0021] This application also provides an energy storage inverter, which includes a storage battery interface for connecting to a storage battery, a power supply interface for connecting to a power supply, and a load interface for connecting to a load; wherein,

[0022] When the power of the storage battery is greater than or equal to the third threshold, the storage battery switches from the first state to the second state, and the energy storage inverter controls the storage battery interface to conduct with the load; and / or,

[0023] When the power of the storage battery is less than or equal to the first threshold, the storage battery switches from the second state to the first state, and the energy storage inverter controls the power supply interface to conduct with the storage battery interface.

[0024] This application also provides an energy storage inverter, including a memory and a processor. A control program is stored on the memory, and when the control program is executed by the processor, the steps of any one of the above control methods are implemented.

[0025] The present application also provides a computer-readable storage medium storing a computer program, which when executed by a processor, implements the steps of any one of the above control methods.

[0026] As described above, the control method of the present application can be applied to an energy storage inverter. When the power of the storage battery is greater than the third threshold, the storage battery is changed from the first state to the second state, and the storage battery is controlled to supply power to the load; and / or when the power of the storage battery is less than the first threshold, the second state of the storage battery is adjusted to the first state, and the power supply is controlled to charge the storage battery. Through the technical solution of the present application, the control function of battery charging can be realized, the problem of accelerated aging of the battery caused by frequent charging and discharging of the battery can be solved, and thus the user experience is improved. Description of the Drawings

[0027] The drawings herein are incorporated into the specification and form a part of the specification, showing embodiments consistent with the present application, and are used together with the specification to explain the principles of the present application. To more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, for those of ordinary skill in the art, other drawings can also be obtained based on these drawings without creative efforts.

[0028] Figure 1 It is a schematic diagram of the scenario of the control method provided by the embodiment of the present application;

[0029] Figure 2 It is a flowchart of the control method provided by the embodiment of the present application Figure 1 ;

[0030] Figure 3 It is a schematic diagram of the energy storage inverter provided by the embodiment of the present application;

[0031] Figure 4 It is a flowchart of the control method provided by the embodiment of the present application Figure 1 。

[0032] The realization of the object of the present application, functional features and advantages will be further described in conjunction with the embodiments with reference to the drawings. Through the above drawings, the clear embodiments of the present application have been shown, and there will be more detailed descriptions hereinafter. These drawings and written descriptions are not intended to limit the scope of the concept of the present application in any way, but to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments. Detailed Embodiments

[0033] Exemplary embodiments will be described in detail herein, and examples thereof are shown in the accompanying drawings. When the following description refers to the accompanying drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. On the contrary, they are merely examples of devices and methods consistent with some aspects of the present application as detailed in the appended claims.

[0034] It should be noted that, in this document, the terms "comprising", "including" or any other variant thereof are intended to cover non-exclusive inclusion, such that a process, method, article or device comprising a series of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article or device. Without further limitation, an element defined by the phrase "comprising a..." does not exclude the presence of additional identical elements in the process, method, article or device comprising such element. In addition, components, features, and elements with the same name in different embodiments of the present application may have the same meaning or different meanings, and their specific meanings need to be determined based on their interpretations in the specific embodiments or further in combination with the context of the specific embodiments.

[0035] It should be understood that although the terms first, second, third, etc. may be used herein to describe various information, such information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of this document, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Depending on the context, the word "if" as used herein may be interpreted as "when" or "upon" or "in response to determining". Furthermore, as used herein, the singular forms "a", "an" and "the" are also intended to include the plural forms unless the context indicates otherwise. It should be further understood that the terms "comprising", "including" indicate the presence of features, steps, operations, elements, components, items, types, and / or groups, but do not exclude the presence, occurrence or addition of one or more other features, steps, operations, elements, components, items, types, and / or groups. The terms "or", "and / or", "including at least one of the following" and the like used in the present application can be interpreted inclusively, or mean any one or any combination. For example, "including at least one of the following: A, B, C" means "any one of the following: A; B; C; A and B; A and C; B and C; A and B and C", and again, "A, B or C" or "A, B and / or C" means "any one of the following: A; B; C; A and B; A and C; B and C; A and B and C". An exception to this definition occurs only when the combination of elements, functions, steps or operations is inherently mutually exclusive in some way.

[0036] It should be understood that although the steps in the flowcharts in the embodiments of the present application are shown sequentially according to the indications of the arrows, these steps are not necessarily executed sequentially in the order indicated by the arrows. Unless there is a clear indication in this article, the execution of these steps has no strict order limitation, and they can be executed in other orders. Moreover, at least a part of the steps in the figure may include multiple sub-steps or multiple stages. These sub-steps or stages are not necessarily executed at the same time, but can be executed at different times, and their execution order is not necessarily sequential, but can be executed alternately or alternately with at least a part of other steps or sub-steps or stages of other steps.

[0037] Depending on the context, the words "if" and "when" as used herein can be interpreted as "when" or "while" or "in response to determining" or "in response to detecting". Similarly, depending on the context, the phrase "if determined" or "if detecting (stated condition or event)" can be interpreted as "when determined" or "in response to determining" or "when detecting (stated condition or event)" or "in response to detecting (stated condition or event)".

[0038] It should be noted that in this article, step codes such as S100 and S200 are adopted. The purpose is to more clearly and briefly express the corresponding content and do not constitute a substantial limitation in order. Those skilled in the art may execute S200 first and then S100 during specific implementation, etc., but these should all be within the protection scope of the present application.

[0039] It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0040] In the following description, suffixes such as "module", "component" or "unit" used to represent elements are only for the convenience of the description of the present application and have no specific meaning in themselves. Therefore, "module", "component" or "unit" can be used interchangeably.

[0041] Figure 1 For the scenario schematic diagram of the control method provided by the embodiments of the present application, as Figure 1 shown, the execution subject of the control method is a energy storage inverter, and the energy storage inverter is respectively connected to a battery, a load and a power source. Optionally, the power source includes a photovoltaic power source and a public power grid.

[0042] Optionally, the battery (Battery) can be connected to the energy storage inverter through a bidirectional battery interface. When electric energy flows from the battery to the energy storage inverter, the battery is in a discharging state, and when electric energy flows from the energy storage inverter to the battery, the battery is in a charging state.

[0043] Optionally, the photovoltaic power source (PV) can be connected to the energy storage inverter through a unidirectional PV-side interface. The photovoltaic power source can collect light energy and convert it into electrical energy to supply power to the battery and the load.

[0044] In some embodiments, the photovoltaic power source can include solar cell modules. When in use, the solar cell modules can preferentially use the photovoltaic input energy to supply power to the load through the PV-side interface. When the photovoltaic energy is insufficient, the photovoltaic plus grid energy can be used to supply power to the load simultaneously, or the photovoltaic plus battery can be used to supply power to the load simultaneously.

[0045] Optionally, the utility grid can be connected to the energy storage inverter through a bidirectional grid interface. When the electrical energy flows from the utility grid to the energy storage inverter, the electrical energy of the utility grid will be stored in the battery and / or the electrical energy of the utility grid will be provided to the load. When the utility grid is in a power shortage state, the utility grid can also receive the electrical energy supplied by the battery and the photovoltaic power source.

[0046] Optionally, the load can be connected to the energy storage inverter through a unidirectional load interface for receiving the electrical energy of the battery, the photovoltaic power source, and the utility grid.

[0047] The energy storage inverter in the embodiments of the present application can adjust the connection state between the corresponding interfaces according to the power consumption state or power supply state of the battery, the photovoltaic power source, the utility grid, and the load, so as to determine the energy management strategy for the load and the battery. Optionally, the energy management strategy can include: when charging the battery, the energy storage inverter can be controlled to use only the photovoltaic power source for charging, and the photovoltaic power source and the utility grid can be charged simultaneously. It can also supply power to the load in the first load priority order of "photovoltaic power source, utility grid, and battery", the second load priority order of "photovoltaic power source, battery, and utility grid", and the combined way of the first load priority order and the second load priority order. When adjusting the energy management strategy, it can be directly adjusted through the control device provided in the energy storage inverter, or can be adjusted through a terminal device / smart terminal device that is wired / wirelessly connected to the energy storage inverter. Thus, through the energy management strategy, the control of the energy storage inverter can be realized.

[0048] Figure 2 Schematic flow of the control method provided by the embodiments of the present application Figure 1 , as Figure 2 shown, this control method is applied to an energy storage inverter. The energy storage inverter is respectively connected to a battery, a load, and a power source. In a feasible implementation manner, the method includes the steps:

[0049] S100. When the power of the storage battery is greater than or equal to the third threshold, control the storage battery to switch from the first state to the second state so that the storage battery powers the load; and / or,

[0050] S200. When the power of the storage battery is less than or equal to the first threshold, control the storage battery to switch from the second state to the first state so that the power supply charges the storage battery.

[0051] Optionally, the threshold can refer to a set power threshold or limit of the storage battery. Through the threshold, the charging and discharging behavior of the battery can be controlled. Optionally, when the power of the storage battery is greater than the third threshold, the energy storage inverter determines that the storage battery is in the second state. When the power of the storage battery is less than the first threshold, the energy storage inverter determines that the storage battery is in the first state.

[0052] Optionally, the first threshold and the third threshold can refer to power thresholds set for the storage battery. Optionally, the power threshold corresponding to the first threshold is less than the power threshold corresponding to the third threshold.

[0053] Optionally, the power threshold corresponding to the first threshold can be the lowest power threshold of the storage battery (such as 20% - 30%). When the power of the storage battery is lower than this threshold, a protection mechanism will be triggered to prevent the battery from over-discharging, so as to increase the service life of the storage battery.

[0054] Optionally, the power threshold corresponding to the third threshold can be that the power of the storage battery reaches or exceeds a certain preset level (such as 70% - 90%). When the power of the storage battery reaches this threshold, the storage battery can perform discharge work, so as to ensure that the storage battery has enough energy to supply power stably and will not be overcharged.

[0055] Optionally, the state of the storage battery can represent the charging state, discharging state, standby state, etc. of the storage battery. Optionally, when the storage battery is in the first state, the storage battery can be in the charging state. At this time, the storage battery can only be charged and cannot perform the discharge operation under normal circumstances (such as when the user has no power available). When the storage battery is in the second state, the storage battery can be in the discharging state and cannot perform the charging operation under normal circumstances (such as when the user has no power available).

[0056] Optionally, when the power supply can supply power, the storage battery in the first state is only used for charging. When the power supply is insufficient to supply power, the user can control the energy storage inverter to make the storage battery in the charging state and with a power higher than the first threshold supply power.

[0057] Optionally, when the battery is in the second state, if there is excess power in the power supply, the user can also control the energy storage inverter to charge the storage battery in the discharging state and with a power lower than the third threshold.

[0058] In some embodiments, when the power level of the storage battery is greater than the third threshold, it can be characterized that the storage battery has sufficient energy to stably supply power. Thus, the power supply mode of the storage battery can be adjusted from the first state (charging state) to the second state (discharging state), and the storage battery can be controlled to supply power to the load.

[0059] Optionally, controlling the storage battery to supply power to the load can mean that the energy storage inverter establishes a connection between the storage battery and the load, and directly delivers the electrical energy in the storage battery to the load to supplement or adjust the power required by the load.

[0060] In some embodiments, when the power level of the storage battery is less than the first threshold, it can be characterized that the storage battery is in a low power state, and protective measures should be taken, such as stopping discharging and switching to other power sources (such as the public power grid) to supply power, to prevent the reduction of the battery life caused by over-discharging of the battery and ensure the stable use and operation of the energy storage inverter. Thus, the second state (discharging state) of the storage battery is adjusted to the first state (charging state), and the power supply is controlled to charge the storage battery.

[0061] Optionally, the power supply can refer to a source or device that provides electrical energy for an electrical device or system, ensuring that the device obtains stable and reliable power supply. Optionally, the power supply includes, but is not limited to, power sources such as the public power grid, generators, and solar photovoltaic systems. Controlling the power supply to charge the storage battery can refer to the process of precisely regulating the power supply (such as mains power, solar photovoltaic system, generator, etc.) to deliver electrical energy to the storage battery through the energy storage inverter, to ensure the safety, efficiency, and optimization of the battery life during charging.

[0062] In some embodiments, during the use of the storage battery in some energy storage inverters, when the power level of the storage battery is lower than the set first power level, the storage battery starts to charge, and when the power level of the storage battery is higher than the set second power level, the storage battery starts to discharge. Thus, as long as the power level of the storage battery is higher than the second power level, it can be discharged as needed, and when it is higher than the first power level, it can be charged as needed. The storage battery will repeatedly charge and discharge between the first power level and the second power level, resulting in accelerated aging of the battery due to multiple cycles. The control method provided in the embodiments of the present application determines the first state or the second state of the storage battery to avoid the problem of frequent charging and discharging when the power level of the storage battery is between the first threshold and the third threshold, thereby improving the service life of the storage battery.

[0063] In a feasible implementation manner, the power supply includes a first power supply and a second power supply. Optionally, the second power supply is a renewable power supply.

[0064] Optionally, step S100 includes: when the power level of the storage battery is greater than or equal to the third threshold, controlling the storage battery to switch from the first state to the second state, so that the storage battery and the second power supply supply power to the load.

[0065] In a feasible implementation, step S200 includes: when the power of the storage battery is less than or equal to the first threshold, controlling the storage battery to switch from the second state to the first state, so that the first power supply and / or the second power supply charge the storage battery, and the first power supply and / or the second power supply supply power to the load.

[0066] Optionally, the first power supply can be a relatively stable and reliable power supply, that is, the alternating current energy provided by the power company and transmitted to homes, enterprises and various facilities through the power transmission and distribution network, such as the public power grid or the mains power.

[0067] Optionally, the second power supply can be a renewable power supply limited by environmental conditions. The renewable power supply can refer to a device or system that converts renewable energy into electrical energy, and has the characteristics of sustainability, environmental protection and low carbon emissions, that is, a system or device that uses renewable energy in nature (such as solar energy, wind energy, water energy, etc.) to generate electrical energy. These energy sources are sustainable, will not be exhausted, and have less impact on the environment.

[0068] Optionally, since the second power supply can be a renewable power supply, in order to avoid waste of this part of the power supply, when in use, the second power supply can cooperate with the storage battery to supply power to the load, or cooperate with the first power supply to charge the storage battery or supply power to the load.

[0069] In some embodiments, when cooperating with the storage battery to supply power to the load, in addition to using the storage battery in the second state and the second power supply to supply power to the load, the second power supply can also be used according to the situation of the second power supply.

[0070] In some embodiments, controlling the first power supply and / or the second power supply to charge the storage battery, and the first power supply and / or the second power supply to supply power to the load may include the following solutions:

[0071] 1. Control the first power supply to charge the storage battery and supply power to the load;

[0072] 2. Control the first power supply and the second power supply to charge the storage battery, and control the first power supply to supply power to the load;

[0073] 3. Control the first power supply to charge the storage battery, and control the first power supply and the second power supply to supply power to the load;

[0074] 4. Control the first power supply and the second power supply to charge the storage battery, and control the first power supply and the second power supply to supply power to the load.

[0075] Optionally, the use of the second power source can be determined according to the current environmental conditions. Optionally, that is, when powering a load, in addition to using the battery in the second state for power supply, the second power source can also be combined for power supply. Optionally, when the environmental conditions do not meet the power supply conditions, the power supply of the second power source can be zero.

[0076] Optionally, when the second power source is a photovoltaic power source and the external light source is sufficient, the energy storage inverter can connect the battery interface and the interface of the photovoltaic power source to the interface of the load to use the battery and the photovoltaic power source to supply power to the load together, or connect the first power source interface and the interface of the photovoltaic power source to the interface of the load to use the first power source and the photovoltaic power source to supply power to the load together, or connect the first power source interface and the interface of the photovoltaic power source to the battery interface to charge the battery.

[0077] Optionally, when the external light source is insufficient at night or on rainy days, the energy storage inverter can connect the battery interface or the first power source interface to the interface of the load to supply power to the load, or connect the first power source interface to the battery interface to charge the battery. At this time, the second power source interface can be connected to the load or the battery, but the power supply of the second power source is zero.

[0078] In a feasible implementation, when the battery is in the first state, the energy storage inverter converts the alternating current at the first power source interface in the power source into direct current to charge the battery; optionally, when the battery is in the second state, the energy storage inverter converts the direct current at the battery interface in the battery into alternating current to supply power to the load.

[0079] Optionally, the energy storage inverter can be a device capable of bidirectional power conversion. When in use, the energy storage inverter can include an inversion mode and a rectification mode. Optionally, the inversion mode can refer to the process of converting direct current (DC) into alternating current (AC). Optionally, after obtaining stable direct current from the battery, through the power semiconductor switches (such as IGBTs or MOSFETs) inside the energy storage inverter, it can be quickly switched according to a preset frequency and mode to simulate the alternating current characteristics of a sine wave. At the same time, in order to ensure the quality of the output alternating current, the energy storage inverter can also use pulse width modulation (PWM) technology to precisely control the voltage and current changes within each cycle, thereby generating standard alternating current suitable for the load to use.

[0080] Optionally, the rectification mode can refer to the process of converting alternating current (AC) into direct current (DC). Optionally, when receiving alternating current from the first power source interface, the alternating current can be converted into rough direct current through a rectifier (such as a diode bridge), and then the current can be further smoothed through components such as capacitors to provide stable direct current for charging the battery.

[0081] Optionally, when the storage battery is in the first state, to avoid discharging of the storage battery, the alternating current of the first power supply interface in the power supply can be converted into direct current to charge the storage battery. When the storage battery is in the second state, to avoid charging during use of the storage battery, the direct current of the battery interface in the storage battery can be converted into alternating current to supply power to the load. Thus, the use of the storage battery can be effectively controlled by the energy storage inverter.

[0082] The control method provided by the embodiment of the present application optimizes the power supply strategy for the load by the first power supply, the second power supply, and the storage battery, so that the entire electric energy can be more reasonably distributed.

[0083] In a feasible implementation manner, the priority of the second power supply in the power supply for the load is greater than the priority of the storage battery in the power supply for the load. Optionally, the priority of the storage battery in the power supply for the load is greater than the priority of the first power supply in the power supply for the load.

[0084] Optionally, the priority of the power supply for the load can refer to the priority of controlling which power supply the energy storage inverter preferentially uses for power supply. Among them, the priority of the power supply for the load can be determined according to the electricity cost, that is, the priority of the second power supply in the power supply for the load is greater than the priority of the storage battery in the power supply for the load, and the priority of the storage battery in the power supply for the load is greater than the priority of the first power supply in the power supply for the load.

[0085] When selecting the corresponding power supply for power supply according to the priority, the energy storage inverter can monitor the status of each power supply (such as voltage, current, frequency, etc.) in real time, and judge which power supply should be used according to the preset logic. In addition, the energy storage inverter can also communicate with an external management system (such as the control software on the mobile phone, the control on the energy storage inverter) to receive instructions or report the status, so as to manage the energy distribution more flexibly.

[0086] Optionally, Figure 3 is a schematic diagram of the energy storage inverter provided by the embodiment of the present application. As Figure 3 shown, a control lever is provided on the energy storage inverter, and the control lever can correspond to three gears:

[0087] 1. The first power supply gear;

[0088] 2. The second power supply gear;

[0089] 3. The storage battery gear.

[0090] When the user pushes the control lever to the corresponding gear, the power supply corresponding to that gear is used as the priority gear for power supply to the load.

[0091] In a feasible implementation manner, when it is detected that the power supply energy of the second power supply in the power supply and / or the power supply energy of the storage battery cannot meet the power consumption requirements of the load, either control the second power supply and the first power supply in the power supply to supply power to the load, or control the storage battery and the first power supply to supply power to the load, or control the second power supply, the storage battery and the first power supply to supply power to the load.

[0092] Optionally, the power supply energy of the second power supply in the power supply and the power supply energy of the storage battery can be continuously monitored through the current and voltage sensors built in the energy storage inverter, and the power consumption requirements of the load can also be continuously monitored through the current and voltage sensors built in the energy storage inverter. Optionally, the power supply energy includes but is not limited to voltage level, frequency stability, and the maximum power output that can be provided. In the embodiments of the present application, by comparing the requirements of the load with the supply capacity of the second power supply, it can be evaluated whether the second power supply can stably provide sufficient power.

[0093] Optionally, for users with relatively high electricity costs, when the second power supply in the power supply cannot meet the power consumption requirements of the load, it can be preferentially determined whether the storage battery can supply power to the load. If the storage battery can supply power to the load, the second power supply and the storage battery can be used to supply power to the load together. Thus, the use of the load can be ensured and the service life of the storage battery can be extended.

[0094] Optionally, when both the storage battery and the second power supply cannot meet the power consumption requirements of the load, the first power supply can be used to supply power to the load. When the voltage of the first power supply is unstable, the second power supply and the storage battery can also be used to supply power to the load together. Thus, the use of the load is ensured.

[0095] Optionally, for users with relatively high load requirements, when the second power supply in the power supply cannot meet the power consumption requirements of the load, it can be preferentially determined whether the first power supply can supply power to the load. If the first power supply cannot meet the power consumption requirements of the load, then the first power supply and the second power supply, the first power supply and the storage battery, and the first power supply, the second power supply and the storage battery can be selected to supply power to the load.

[0096] Optionally, when more than two power supplies are selected to supply power to the load, the interfaces of each power supply can be respectively connected to the load, and by determining the status (voltage, current, frequency, etc.) of each power supply and the requirements of the load, the power supply ratio of each power supply can be controlled. Thus, more than two power supplies can be used to supply power to the load.

[0097] Figure 4 Flow schematic of the control method provided by the embodiments of the present application Figure 1 , such as Figure 4As shown, the control method is applied to an energy storage inverter, which is respectively connected to a storage battery, a load, and a power source. In a feasible implementation, after step S100, the method further includes: S300. When the power of the storage battery is greater than a second threshold and less than a third threshold, controlling a second power source to charge the storage battery, and controlling the first power source and / or the second power source to supply power to the load.

[0098] Optionally, the second threshold is between the first threshold and the third threshold. By setting the second threshold and controlling the first power source to only supply power to the load when the power of the storage battery is greater than the second threshold and less than the third threshold, a stable power supply to the load is ensured. At the same time, by charging the storage battery with the second power source when the power of the storage battery is between the first threshold and the third threshold, the energy utilization efficiency can be improved, the cost - benefit can be optimized, and carbon emissions can be reduced.

[0099] In some embodiments, the power threshold corresponding to the second threshold can represent a medium power level of the storage battery (such as 50% - 70%). The second threshold can be used to mark that the current of the storage battery is in a partially charged state. At this time, the charging and power supply strategies can be optimized to improve the energy utilization efficiency and protect the battery health.

[0100] In some embodiments, when the storage battery is in the second state (discharging), when the power of the storage battery is greater than the second threshold and less than the third threshold, the storage battery supplies power to the load. And if the storage battery is in the first state (charging), the storage battery still charges under normal circumstances.

[0101] In a feasible implementation, after step S300, when the power of the storage battery is charged to be greater than the third threshold, the storage battery can be controlled to enter the second state from the first state, so that the storage battery and / or the second power source in the power source supply power to the load, that is, step S100 is re - executed.

[0102] In some embodiments, the power of the second power source can be used for the load and the storage battery. When the power of the storage battery is greater than the third threshold, to avoid waste of electric energy in the second power source, the storage battery can be used for power supply, so that the second power source can charge the storage battery later. Optionally, when used on the same day, when the storage battery is fully charged, if the power grid (the first power source) is still used to supply power to the load, the remaining power (the power except for supplying the load) generated in the photovoltaic power source (the second power source) will be wasted because it cannot be charged into the battery.

[0103] Optionally, when the power level of the storage battery in the charging state (the first state) is greater than the second threshold, a certain amount of power can be ensured in the storage battery for use in special situations. Optionally, when there is a continuous power outage, the power of the storage battery and the second power source can be used to ensure the operation of the load. When there is a continuous power outage and continuous rain, the basic operation of the load can be ensured by the power of the storage battery.

[0104] In a feasible implementation, when the first power source in the power supply is in a power shortage state, the second power source and / or the storage battery in the power supply are controlled to supply power to the first power source.

[0105] Optionally, the first power source being in a power shortage state may mean that the first power source cannot provide sufficient power to meet the load demand, and the common manifestations may be unstable voltage, abnormal frequency, or power outage. The energy storage inverter can determine whether the first power source is in a power shortage state by monitoring these key parameters.

[0106] Optionally, when the first power source is the mains power, in the case of a peak electricity consumption period, the first power source may be in a power shortage state due to insufficient power.

[0107] When the first power source in the power supply is in a power shortage state, controlling the second power source and / or the storage battery to supply power to the first power source may mean that the user can feedback the power in the second power source and / or the storage battery to the first power source through grid connection.

[0108] Optionally, when the first power source is the mains power supply, under the condition of complying with the laws and regulations of the location of the energy storage inverter, the user controls the interfaces of the second power source and the storage battery in the energy storage inverter to be connected to the mains grid, so as to input the power that complies with the technical specifications and safety standards of the local power company into the mains grid to supply power to other loads that need electricity, and can obtain benefits therefrom, improving the user experience.

[0109] The control method provided in this application can be based on the first threshold, the second threshold, and the third threshold set for the storage battery in the energy storage inverter. Optionally, when the storage battery is in the discharge state, if the power level of the storage battery is greater than the first threshold, the energy storage inverter is in the inversion state, and the photovoltaic power source and the storage battery jointly supply power to the load. When the storage battery discharges to a power level less than or equal to the first threshold, the storage battery adjusts to the charging state, and the mains power supply supplies power to the storage battery and the load. When the storage battery charges to a level greater than or equal to the second threshold, the mains power supply can supply power only to the load. When the storage battery charges to a level greater than the third threshold, the storage battery adjusts to the discharge state and switches to the storage battery and the photovoltaic jointly supplying power to the load.

[0110] Therefore, the control method provided by this application can solve the problems of excessive battery aging and reduced battery life caused by frequent charging and discharging of the battery. At the same time, it also improves the problem of low conversion efficiency, where the battery discharge to the load often has only a 70% conversion efficiency due to excessive battery aging.

[0111] Especially for some areas or regions where power outages are frequent and electricity bills are expensive, users can reduce the battery cycle times through the control method applied to the energy storage inverter provided by this application, ensuring the power supply effect of the energy storage inverter to the load, thereby improving the user experience. Optionally, based on the scheme that when the storage battery is greater than the third threshold, the storage battery is used to supply power to the load, it can improve the existing method. In the case where the storage battery is fully charged and the solar energy is sufficient, only the photovoltaic power supply is used to supply power to the load. When the demand of the load is small, most of the energy of the photovoltaic power supply is discarded (the battery is full and cannot be stored anymore). Therefore, when the photovoltaic power supply is supplying power, it uses the grid power all the time if there is no power outage, and only uses the battery when there is a power outage. This makes the photovoltaic energy not be maximally utilized, the green energy is discarded, and the economic performance of the energy storage inverter is poor.

[0112] In a feasible implementation manner, the method further includes: in response to a user operation, controlling the storage battery in the first state to supply power to the load, or controlling the power supply to charge the storage battery in the second state.

[0113] Optionally, in order to better meet the user's electricity demand, the user can also control the use of the energy storage device by operating the energy storage device, that is, when the user performs a specific operation on the energy storage device, the energy storage device correspondingly executes according to the specific operation. Optionally, when a special situation occurs (such as a sudden power outage), even if the current storage battery is currently in the first state, after the user operates a certain control on the energy storage device, the storage battery can supply power to the load through the energy storage device. Optionally, when other special situations occur (such as the second power supply having sufficient power), even if the current storage battery is currently in the second state, after the user operates another control on the energy storage device, the power supply is controlled through the energy storage device to charge the storage battery in the second state.

[0114] This application also provides an energy storage inverter, which is respectively connected to a storage battery and a load.

[0115] Optionally, the energy storage inverter includes a storage battery interface for connecting the storage battery, a power supply interface for connecting the power supply, and a load interface for connecting the load.

[0116] Optionally, when the power of the storage battery is greater than or equal to the third threshold, the storage battery switches from the first state to the second state, and the energy storage inverter controls the storage battery interface to conduct with the load.

[0117] Optionally, when the power of the storage battery is less than or equal to the first threshold, the storage battery switches from the second state to the first state, and the energy storage inverter controls the power interface to conduct to the battery interface.

[0118] Optionally, the energy storage inverter further includes a control module, which is configured to control the storage battery to switch from the first state to the second state when the power of the storage battery is greater than or equal to the third threshold, so that the storage battery powers the load.

[0119] Optionally, the control module is further configured to control the storage battery to switch from the second state to the first state when the power of the storage battery is less than or equal to the first threshold, so that the power source charges the storage battery.

[0120] Optionally, the power source includes a first power source and a second power source.

[0121] Optionally, the control module is configured to control the storage battery to switch from the first state to the second state when the power of the storage battery is greater than or equal to the third threshold, so that the storage battery and the second power source power the load.

[0122] Optionally, the control module is configured to control the storage battery to switch from the second state to the first state when the power of the storage battery is less than or equal to the first threshold, so that the first power source and / or the second power source charge the storage battery, and the first power source and / or the second power source power the load.

[0123] Optionally, the control module is further configured to control the second power source to charge the storage battery and control the first power source and / or the second power source to power the load when the power of the storage battery is greater than the second threshold and less than the third threshold.

[0124] Optionally, when it is monitored that the power supply energy of the second power source and / or the power supply energy of the storage battery cannot meet the power consumption requirements of the load, the control module is configured to control the second power source and the first power source to power the load, or to control the storage battery and the first power source to power the load, or to control the second power source, the storage battery and the first power source to power the load.

[0125] Optionally, the control module is configured to convert the alternating current of the first power interface into direct current to charge the storage battery when the storage battery is in the first state.

[0126] Optionally, the control module is configured to convert the direct current of the battery interface in the storage battery into alternating current to power the load when the storage battery is in the second state.

[0127] Optionally, the control module is configured to control the second power source and / or the storage battery to power the first power source when the first power source is in a power shortage state.

[0128] Optionally, the control module is configured to respond to a user operation and control the battery in the first state to supply power to the load; or, control the power supply to charge the battery in the second state.

[0129] It should be noted that the technical details of this embodiment have been elaborated in detail in the above embodiments and will not be repeated here.

[0130] This application also provides an energy storage inverter, including a memory and a processor. A control program is stored on the memory, and when the control program is executed by the processor, the steps of the control method in any of the above embodiments are implemented.

[0131] This application also provides a computer-readable storage medium, on which a control program is stored. When the control program is executed by the processor, the steps of the control method in any of the above embodiments are implemented.

[0132] In the embodiments of the energy storage inverter and the computer-readable storage medium provided in this application, all the technical features of any of the above control method embodiments may be included. The expansion and explanation content of the specification is basically the same as that of the above method embodiments and will not be repeated here.

[0133] This application embodiment also provides a computer program product, which includes computer program code. When the computer program code runs on a computer, the computer is caused to execute the methods in the above various possible implementation manners.

[0134] This application embodiment also provides a chip, including a memory and a processor. The memory is used to store a computer program, and the processor is used to call and run the computer program from the memory, so that the device equipped with the chip executes the methods in the above various possible implementation manners.

[0135] It can be understood that the above scenarios are only examples and do not constitute a limitation on the application scenarios of the technical solutions provided in the embodiments of this application. The technical solutions of this application can also be applied to other scenarios. For example, as known to those of ordinary skill in the art, with the evolution of the system architecture and the emergence of new service scenarios, the technical solutions provided in the embodiments of this application are equally applicable to similar technical problems.

[0136] The serial numbers of the above embodiments of this application are only for description and do not represent the advantages or disadvantages of the embodiments.

[0137] The steps in the method of the embodiments of this application can be adjusted, combined, and deleted according to actual needs.

[0138] The units in the devices of the embodiments of this application can be combined, divided, and deleted according to actual needs.

[0139] In this application, for the description of the same or similar term concepts, technical solutions, and / or application scenarios, generally only the first occurrence is described in detail. When they appear repeatedly later, for the sake of brevity, they are generally not described again. When understanding the technical solutions and other content of this application, for the same or similar term concepts, technical solutions, and / or application scenarios that are not described in detail later, reference can be made to the relevant detailed descriptions before them.

[0140] In this application, the descriptions of the various embodiments each have their own focuses. For the parts not described in detail or recorded in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0141] The technical features of the technical solutions of this application can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the various technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered to be within the scope recorded in this application.

[0142] Through the description of the above embodiments, those skilled in the art can clearly understand that the above embodiment methods can be implemented by means of software plus a necessary general hardware platform. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation method. Based on such an understanding, the essence of the technical solution of this application, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product is stored in a storage medium as described above (such as ROM / RAM, magnetic disk, optical disc), and includes several instructions for causing a terminal device (which can be a mobile phone, computer, server, controlled terminal, or network device, etc.) to execute the methods of each embodiment of this application.

[0143] In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented using software, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the processes or functions according to the embodiments of the present application are generated in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices. The computer instructions can be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer instructions can be transmitted from one website, computer, server, or data center to another website, computer, server, or data center in a wired manner (such as coaxial cable, optical fiber, digital subscriber line) or a wireless manner (such as infrared, wireless, microwave, etc.). The computer-readable storage medium can be any available medium that can be accessed by a computer, or a data storage device such as a server or data center that includes one or more integrated available media. The available medium can be a magnetic medium (such as a floppy disk, storage disk, magnetic tape), an optical medium (such as a DVD), or a semiconductor medium (such as a Solid State Disk (SSD)), etc.

[0144] The above are only the preferred embodiments of the present application, and do not limit the patent scope of the present application. Any equivalent structural or equivalent process transformations made by using the content of the specification and drawings of the present application, or directly or indirectly applied in other related technical fields, are equally included in the patent protection scope of the present application.

Claims

1. A control method, characterized in that: Includes steps: S100, when the power of the battery is greater than or equal to a third threshold, controlling the battery to switch from a first state to a second state so that the battery supplies power to a load; and / or, S200: When the power level of the storage battery is less than or equal to a first threshold, control the storage battery to switch from the second state to the first state, so that a power source charges the storage battery.

2. The method according to claim 1, characterized in that The power supply includes a first power supply and a second power supply; The step S100 includes: When the power level of the storage battery is greater than or equal to a third threshold, controlling the storage battery to switch from the first state to the second state so that the storage battery and the second power supply supply power to the load; or The step S200 includes: When the power level of the battery is less than or equal to a first threshold, the battery is controlled to switch from the second state to the first state, so that the first power supply and / or the second power supply charges the battery, and the first power supply and / or the second power supply supplies power to the load.

3. The method according to claim 2, characterized in that The method further comprises: S300: When the power level of the storage battery is greater than a second threshold and less than a third threshold, control the second power supply to charge the storage battery, and control the first power supply and / or the second power supply to supply power to the load.

4. The method according to claim 2, characterized in that: The priority of the second power supply for supplying power to the load is greater than the priority of the storage battery for supplying power to the load; and / or, The priority of the storage battery supplying power to the load is higher than the priority of the first power source supplying power to the load.

5. The method according to any one of claims 2 to 4, characterized in that When it is monitored that the power supply energy of the second power supply and / or the power supply energy of the battery cannot meet the power demand of the load, the second power supply and the first power supply are controlled to power the load, or the battery and the first power supply are controlled to power the load, or the second power supply, the battery and the first power supply are controlled to power the load.

6. The method according to any one of claims 2 to 4, characterized in that When the storage battery is in the first state, the alternating current of the first power interface is converted into direct current to charge the storage battery; or, When the storage battery is in the second state, the direct current of the battery interface in the storage battery is converted into alternating current to supply power to the load.

7. The method according to any one of claims 2 to 4, characterized in that When the first power source is in a power-deficient state, the second power source and / or the storage battery is controlled to supply power to the first power source.

8. The method according to any one of claims 1 to 4, characterized in that The method further comprises: In response to a user operation, the storage battery in the first state is controlled to supply power to the load; or the power supply is controlled to charge the storage battery in the second state.

9. An energy storage inverter, characterized in that: The energy storage inverter includes a battery interface for connecting to a battery, a power interface for connecting to a power source, and a load interface for connecting to a load, wherein: When the power of the battery is greater than or equal to the third threshold, the battery is switched from the first state to the second state, and the energy storage inverter controls the battery interface to be connected to the load, and / or, when the power of the battery is less than or equal to the first threshold, the battery is switched from the second state to the first state, and the energy storage inverter controls the power interface to be connected to the battery interface; and / or, The energy storage inverter includes a memory and a processor. The memory stores a control program. When the control program is executed by the processor, the steps of the control method according to any one of claims 1 to 8 are implemented.

10. A readable storage medium, characterized in that: The readable storage medium stores a computer program, and when the computer program is executed by a processor, the steps of the control method according to any one of claims 1 to 8 are implemented.

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