Household energy storage system and method based on wireless communication

Abstract

The invention relates to the technical field of household energy storage, and discloses a household energy storage system and method based on wireless communication, wireless communication can be realized among modules in the system, and the method can improve the expansibility and flexibility of the system and realize intelligent scheduling through wireless communication in the household energy storage system; the central controller establishes a wireless communication architecture based on each wireless communication unit through a wireless ad hoc network technology; the acquisition module acquires electric power data of a household power grid and sends the acquired electric power data to the central controller based on a wireless communication architecture; the central controller formulates a power dispatching strategy according to the power data sent by the acquisition device; and the central controller dispatches the power utilization of the household power grid according to the power dispatching strategy. According to the technical scheme, the problems that a traditional household energy storage system is complex in wiring, poor in expansibility and insufficient in intelligent degree can be solved.

Description

Technical Field

[0001] The present invention relates to the technical field of home energy storage, and in particular to a home energy storage system and method based on wireless communication. Background Art

[0002] Home energy storage systems (HESS) are becoming increasingly popular and a key means for households to store electricity and conserve energy. These systems typically store electricity from solar photovoltaic (PV) systems or the grid, helping users optimize electricity costs and providing backup power, particularly for critical household loads during power outages.

[0003] Most existing home energy storage systems use communication methods based on wired connections. These communication methods are used to achieve data interaction and coordination between various modules (such as battery modules, inverters, etc.) within the energy storage system. In the traditional wired communication method of the home energy storage system, it is necessary to lay communication cables between the various modules. This wiring method is not only complicated and time-consuming, but also requires professional technicians to operate during the installation and maintenance process, which increases the installation cost. In addition, when adding or removing modules, rewiring is required, which limits the scalability and flexibility of the system. At the same time, when the existing home energy storage system power supply works in conjunction with the city grid power supply, there are problems such as low efficiency and insufficient intelligence. It is impossible to give full play to the advantages of the home energy storage system and improve economic benefits. Therefore, the present invention proposes a home energy storage system and method based on wireless communication to solve the problems of complex wiring, poor scalability, and insufficient intelligence of the traditional home energy storage system. Summary of the Invention

[0004] The main purpose of the present invention is to provide a home energy storage system and method based on wireless communication to solve the problems of complex wiring, poor scalability and insufficient intelligence of traditional home energy storage systems.

[0005] The technical solution proposed by the present invention is:

[0006] A method for a wireless communication-based home energy storage system is applied to a wireless communication-based home energy storage system; the system is applied to a home power grid; the system includes a photovoltaic module, a central controller, and a data acquisition module; the photovoltaic module, the central controller, and the data acquisition module are respectively provided with a wireless communication unit capable of communicating with each other; the method includes:

[0007] The central controller establishes a wireless communication architecture based on each of the wireless communication units through wireless ad hoc networking technology;

[0008] The acquisition module collects power data of the home power grid and sends the collected power data to the central controller based on the wireless communication architecture, wherein the power data includes the power consumption of the load and the power generation of the photovoltaic module;

[0009] The central controller formulates a power dispatching strategy based on the power data sent by the acquisition device;

[0010] The central controller dispatches the electricity consumption of the home power grid according to the power dispatching strategy.

[0011] Preferably, the central controller establishes a wireless communication architecture based on each of the wireless communication units through wireless ad hoc networking technology, including:

[0012] The central controller selects a wireless communication protocol of the wireless communication architecture according to the connection requirements of each module, wherein the connection requirements include: transmission range, energy loss and anti-interference ability, and the wireless communication protocols include Wi-Fi protocol, Bluetooth protocol and Zigbee protocol;

[0013] The central controller selects a system topology of the wireless communication architecture according to the scale of the home power grid. The system topology includes: a star topology, a mesh topology, and a hybrid topology.

[0014] Preferably, the system further includes an energy storage module, an inverter, and a user terminal; the energy storage module, the inverter, and the user terminal are respectively provided with wireless communication units capable of communicating with each other; the system further includes a gateway / bridge device for communication between different wireless communication protocols; the energy storage module includes a plurality of energy storage batteries, and a battery management unit for monitoring and managing the energy storage batteries; the central controller selects a wireless communication protocol of the wireless communication architecture according to the connection requirements of each module, including:

[0015] The central controller communicates with the user terminal using the Wi-Fi protocol;

[0016] The central controller controls the communication between the energy storage batteries, and between the energy storage batteries and the battery management unit using the Bluetooth protocol;

[0017] The central controller controls the energy storage module, the photovoltaic module, the inverter and the acquisition module to communicate with each other using the Zigbee protocol.

[0018] Preferably, the central controller establishes a wireless communication architecture based on each of the wireless communication units through wireless ad hoc networking technology, and then further includes:

[0019] The central controller encrypts wireless communications between wireless communication units in the wireless communication architecture, including:

[0020] When the user terminal sends the collected power data to the central controller, the central controller encrypts the data, wherein the data encryption includes encrypting the data at the transport layer and the application layer respectively;

[0021] When the user terminal sends the collected power data to the central controller, the central controller performs identity authentication on the user terminal, wherein the identity authentication includes two-factor authentication and digital certificate;

[0022] When the user terminal logs in or performs an operation, the central controller generates a unique password to verify the login or operation of the user terminal;

[0023] When the user terminal sends the collected power data to the central controller, the central controller sets a defense mechanism, wherein the defense mechanism includes setting a network intrusion detection and a firewall.

[0024] Preferably, the central controller is capable of connecting to the network to receive dynamic electricity price information and weather forecast information; the central controller formulates a power dispatching strategy based on the power data sent by the acquisition device, including:

[0025] The central controller generates a power consumption prediction model based on the power consumption of each load in the home power grid during a first preset period of time in the past;

[0026] The central controller uses the power consumption prediction model to predict the power consumption of each load in a second preset time period in the future;

[0027] The central controller predicts the power generation of the photovoltaic module in a second preset time period in the future based on weather forecast information;

[0028] The central controller determines whether the sum of the stored electricity of the energy storage module and the power generation of the photovoltaic module in the second preset time period in the future can meet the electricity consumption in the second preset time period in the future;

[0029] If so, the central controller controls the energy storage module and / or the photovoltaic module to supply power to the home grid during the second preset period in the future;

[0030] If not, the central controller divides the day into a high electricity price period and a low electricity price period according to the dynamic electricity price information;

[0031] During periods of high electricity prices, the central controller controls the energy storage module and / or the photovoltaic module to supply power to the home grid;

[0032] During low electricity price periods, the central controller controls access to the city grid to supply power to the household grid.

[0033] Preferably, the central controller formulates a power dispatching strategy based on the power data sent by the acquisition device, and further comprises:

[0034] The central controller determines whether the energy storage module is fully charged;

[0035] If so, the central controller controls the energy storage module to stop charging;

[0036] If not, the central controller controls the photovoltaic module to charge the energy storage module, and / or uses the city grid to charge the energy storage module during a period of low electricity prices.

[0037] Preferably, the system further comprises a smart socket, through which each load is connected to the home power grid, and the smart socket can wirelessly communicate with each module; the central controller formulates a power dispatching strategy based on the power data sent by the acquisition device, and further comprises:

[0038] The central controller classifies each load into essential loads and non-essential loads according to the power usage priority of each load in the home power grid;

[0039] The central controller determines whether the power supply of the home grid is sufficient;

[0040] If so, the central controller controls each of the smart sockets to be in an open state;

[0041] If not, the central controller controls the smart socket connected to the essential load to be in an open state, and controls the smart socket connected to the non-essential load to be in a closed state.

[0042] Preferably, the central controller is capable of connecting to a network to receive power outage information; the central controller formulates a power dispatching strategy based on the power data sent by the acquisition device, and further comprises:

[0043] The central controller obtains an estimated power outage period based on the power outage information;

[0044] The central controller controls the energy storage module to stop supplying power to the home grid during a second preset period before the estimated power outage period, and controls the photovoltaic module and / or the mains grid to fully charge the energy storage module simultaneously.

[0045] Preferably, the system further comprises an alarm module; and the method further comprises:

[0046] The battery management unit monitors the status data of the energy storage battery, wherein the status data includes: battery voltage, current and temperature;

[0047] When the battery management unit detects that the status data of the energy storage battery does not match the preset status data, the battery management unit sends a stop-operation instruction to the energy storage battery and generates an alarm message, wherein the preset status information is that the battery voltage exceeds the safe voltage range, the battery current exceeds the safe current range, and the battery temperature exceeds the safe temperature;

[0048] The battery management unit sends the alarm information to the central controller;

[0049] The central controller controls the alarm module to sound an alarm and sends the alarm information to the user terminal.

[0050] The present invention also proposes a home energy storage system based on wireless communication, and a method for applying the home energy storage system based on wireless communication; the system comprises an energy storage module, a photovoltaic module, an inverter, a central controller, a collection module, and a user terminal; the energy storage module, the photovoltaic module, the inverter, the central controller, the collection module, and the user terminal are respectively provided with a wireless communication unit for realizing wireless communication between the modules of the system;

[0051] The energy storage module includes a plurality of energy storage batteries and a battery management unit for monitoring and managing the energy storage batteries; the energy storage batteries are used to store electricity obtained from the photovoltaic module or the city grid;

[0052] The photovoltaic module is arranged outdoors to supply power to the household power grid and / or to charge the battery module;

[0053] The inverter is used to convert the direct current generated by the photovoltaic module and the direct current stored in the battery module into alternating current for use in the home power grid;

[0054] The central controller is used to receive and control the working status of the battery module, the photovoltaic module, the inverter and the acquisition module, and send the status information to the user terminal;

[0055] The acquisition module is used to collect power data in the home power grid;

[0056] The user terminal is used to receive system operating conditions fed back by the central controller and to issue instructions to the central controller.

[0057] The above technical solution can achieve the following beneficial effects:

[0058] The home energy storage system and method based on wireless communication proposed by the present invention, by setting a wireless communication unit on each module in the home energy storage system, enables wireless communication between the modules. The central controller establishes a wireless communication architecture based on each wireless communication unit and through wireless ad hoc networking technology. Therefore, based on the wireless communication architecture, it is convenient to add and remove modules, which greatly increases the scalability and flexibility of the system and can effectively solve the problems of complex wiring and high installation costs of traditional wired communication; the acquisition module can collect power data in the home power grid and send the collected power data to the central controller based on the wireless communication architecture. Therefore, the central controller can connect the status of each module in the system in real time and can promptly discover problems in the system, which is conducive to improving the safety of the system; the central controller formulates a power dispatching strategy based on the power data collected by the acquisition device. Therefore, the power dispatching strategy can realize intelligent dispatching of household electricity consumption and improve energy utilization efficiency and electricity economy. In summary, the home energy storage system and method based on wireless communication proposed by the present invention can solve the problems of complex wiring, poor scalability and insufficient intelligence of traditional home energy storage systems through wireless communication technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0059] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0060] Figure 1 A flowchart of the steps of a first embodiment of a method for a wireless communication-based home energy storage system according to the present invention;

[0061] Figure 2 This is a schematic diagram of power line connections for a first embodiment of a method for a wireless communication-based home energy storage system according to the present invention. DETAILED DESCRIPTION

[0062] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0063] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0064] In addition, the terms "first," "second," and so on, used in this disclosure are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referenced. Thus, a feature specified as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of this disclosure, "plurality" means at least two, such as two or three, unless otherwise specifically defined.

[0065] In the present invention, unless otherwise specified or limited, the terms "connection" and "fixation" should be understood in a broad sense. For example, "fixation" can mean fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will be able to understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0066] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that ordinary technicians in this field can implement it. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0067] The present invention provides a household energy storage system and method based on wireless communication.

[0068] Please refer to Figures 1 to 2 In a first embodiment of a method for a wireless communication-based home energy storage system proposed by the present invention, the method is applied to a wireless communication-based home energy storage system; the system is applied to a home power grid; the system includes a photovoltaic module, a central controller, and a data acquisition module; the photovoltaic module, the central controller, and the data acquisition module are each provided with a wireless communication unit capable of communicating with each other; the method includes:

[0069] Step S110: The central controller establishes a wireless communication architecture based on each of the wireless communication units through wireless ad hoc networking technology;

[0070] Specifically, each module in the system is equipped with a unique identifier for mutual identification and connection. When a new module is added to the system, the central controller automatically searches for and identifies the newly added module and dynamically configures it based on the new module's parameters and system requirements to ensure that the new module can be smoothly integrated into the system and work in conjunction with existing modules.

[0071] Step S120: The collection module collects power data of the home power grid and sends the collected power data to the central controller based on the wireless communication architecture, wherein the power data includes power consumption of the load and power generation of the photovoltaic module;

[0072] Specifically, the collection device includes a smart meter and a power monitor; there are multiple smart meters and power monitors; one of the smart meters is set between the home power grid and the municipal power grid, and is used to monitor the amount of electricity transmitted from the municipal power grid to the home power grid; the other smart meter is set on the output side of the photovoltaic module to monitor the power generation of the photovoltaic module; the function monitor is set on the input side of the load to monitor the power consumption of each load.

[0073] Step S130: the central controller formulates a power dispatching strategy according to the power data sent by the acquisition device;

[0074] Step S140: the central controller dispatches the electricity consumption of the home power grid according to the power dispatching strategy.

[0075] The home energy storage system and method based on wireless communication proposed by the present invention, by setting a wireless communication unit on each module in the home energy storage system, enables wireless communication between the modules. The central controller establishes a wireless communication architecture based on each wireless communication unit and through wireless ad hoc networking technology. Therefore, based on the wireless communication architecture, it is convenient to add and remove modules, which greatly increases the scalability and flexibility of the system and can effectively solve the problems of complex wiring and high installation costs of traditional wired communication; the acquisition module can collect power data in the home power grid and send the collected power data to the central controller based on the wireless communication architecture. Therefore, the central controller can connect the status of each module in the system in real time and can promptly discover problems in the system, which is conducive to improving the safety of the system; the central controller formulates a power dispatching strategy based on the power data collected by the acquisition device. Therefore, the power dispatching strategy can realize intelligent dispatching of household electricity consumption and improve energy utilization efficiency and electricity economy. In summary, the home energy storage system and method based on wireless communication proposed by the present invention can solve the problems of complex wiring, poor scalability and insufficient intelligence of traditional home energy storage systems through wireless communication technology.

[0076] Furthermore, the photovoltaic module includes a photovoltaic panel, a photoelectric sensor and a dual-axis tracking device; the photoelectric sensor can transmit the sun's position information to the dual-axis tracking device, and the dual-axis tracking device can adjust the position of the photovoltaic panel according to the received sun's position information to maximize the power generation of the photovoltaic panel.

[0077] In a second embodiment of a method for a home energy storage system based on wireless communication proposed by the present invention, based on the first embodiment, step S110 includes the following steps:

[0078] Step S210: The central controller selects a wireless communication protocol of the wireless communication architecture according to the connection requirements of each module, wherein the connection requirements include: transmission range, energy loss and anti-interference capability, and the wireless communication protocols include Wi-Fi protocol, Bluetooth protocol and Zigbee protocol;

[0079] Step S220: The central controller selects a system topology of the wireless communication architecture according to the scale of the home power grid, wherein the system topology includes: a star topology, a mesh topology, and a hybrid topology;

[0080] Specifically, the star topology is suitable for small-scale home energy storage systems; the mesh topology is suitable for systems that need to cover a larger area or have multiple distributed devices; and the hybrid topology is suitable for medium- to large-scale home energy storage systems. In this embodiment, a mesh network is selected to ensure system communication stability when adding or removing modules.

[0081] In a third embodiment of a method for a home energy storage system based on wireless communication proposed by the present invention, based on the second embodiment, the system further includes an energy storage module, an inverter, and a user terminal (such as a mobile phone or a computer); the energy storage module, the inverter, and the user terminal are respectively provided with a wireless communication unit capable of communicating with each other; the system further includes a gateway / bridge device for communication between different wireless communication protocols; the energy storage module includes a plurality of energy storage batteries, and a battery management unit for monitoring and managing the energy storage batteries; step S210 includes:

[0082] The central controller communicates with the user terminal using the Wi-Fi protocol;

[0083] The central controller controls the communication between the energy storage batteries, and between the energy storage batteries and the battery management unit using the Bluetooth protocol;

[0084] The central controller controls the energy storage module, the photovoltaic module, the inverter and the acquisition module to communicate with each other using the Zigbee protocol;

[0085] Specifically, the user terminal monitors and controls the working status of each module and load in the home energy storage system.

[0086] In a fourth embodiment of a method for a home energy storage system based on wireless communication proposed by the present invention, based on the third embodiment, step S110 further includes the following steps:

[0087] Step S410: The central controller encrypts wireless communications between wireless communication units in the wireless communication architecture, including:

[0088] Step S411: When the user terminal sends the collected power data to the central controller, the central controller encrypts the data, wherein the data encryption includes encrypting the data at the transport layer and the application layer respectively;

[0089] Specifically, transport layer encryption includes using the TLS / SSL protocol to encrypt all data transmitted over the network; application layer encryption includes using the Advanced Encryption Standard (AES) for end-to-end encryption of sensitive data (such as user authentication information and control instructions).

[0090] Step S412: When the user terminal sends the collected power data to the central controller, the central controller performs identity authentication on the user terminal, wherein the identity authentication includes two-factor authentication and digital certificate;

[0091] Specifically, two-factor authentication includes the use of passwords and biometric technology (such as fingerprint or facial recognition) to achieve strong identity authentication; digital certificate authentication, that is, using digital certificates to verify the identity of devices and services, ensuring that only devices with valid certificates can access the system

[0092] Step S413: When the user terminal logs in or performs an operation, the central controller generates a unique password to verify the login or operation of the user terminal;

[0093] Specifically, a time-based one-time password algorithm (TOTP) or an HMAC-based dynamic password generation mechanism is used to generate a unique password for each login or key operation.

[0094] Step S414: When the user terminal sends the collected power data to the central controller, the central controller sets a defense mechanism, wherein the defense mechanism includes setting a network intrusion detection and a firewall;

[0095] Specifically, setting up network intrusion detection includes deploying a network intrusion detection system (NIDS) to monitor network traffic in order to promptly detect and respond to potential attacks; setting up a firewall includes establishing firewall rules to limit unnecessary network access and only allow authorized traffic to enter the home energy storage system.

[0096] In a fifth embodiment of a method for a home energy storage system based on wireless communication proposed by the present invention, based on the third embodiment, the central controller is capable of connecting to a network to receive dynamic electricity price information and weather forecast information; step S130 includes the following steps:

[0097] Step S510: The central controller generates a power consumption prediction model based on the power consumption of each load in the home power grid in the past first preset period (such as the past month);

[0098] Specifically, the electricity consumption prediction model can be established using Matlab software and Python programming language.

[0099] Step S520: The central controller uses the power consumption prediction model to predict the power consumption of each load in a second preset time period in the future (such as the next day);

[0100] Step S530: The central controller predicts the power generation of the photovoltaic module in a second preset time period in the future (such as the next day) based on weather forecast information;

[0101] Step S540: the central controller determines whether the sum of the stored electricity of the energy storage module and the power generation of the photovoltaic module in the second preset time period in the future can meet the electricity consumption in the second preset time period in the future;

[0102] Step S550: If yes, the central controller controls the energy storage module and / or the photovoltaic module to supply power to the home grid during the second preset period in the future;

[0103] Specifically, the central controller controls to preferentially consume the electric energy generated by the photovoltaic module, and then consumes the electric energy stored in the energy storage module.

[0104] Step S560: If not, the central controller divides the day into a high electricity price period and a low electricity price period according to the dynamic electricity price information;

[0105] Specifically, the dynamic electricity price information is the dynamic electricity price released by the power company.

[0106] Step S570: During a period of high electricity prices, the central controller controls the energy storage module and / or the photovoltaic module to supply power to the home grid;

[0107] Step S580: During a period of low electricity prices, the central controller controls access to the municipal grid to supply power to the household grid;

[0108] Specifically, the central controller controls the use of electricity from the municipal grid during periods of low electricity prices, and uses the electricity stored in the energy storage module or the electricity generated by the photovoltaic module during periods of high electricity prices. This can greatly improve the economy of electricity use and effectively support the implementation of demand response on the resident side.

[0109] In a sixth embodiment of a method for a home energy storage system based on wireless communication proposed by the present invention, based on the fifth embodiment, step S130 includes the following steps:

[0110] Step S610: The central controller determines whether the energy storage module is fully charged.

[0111] Specifically, the battery management unit detects the power status of the energy storage battery and sends the power status to the central controller.

[0112] Step S620: If yes, the central controller controls the energy storage module to stop charging;

[0113] Step S630: If not, the central controller controls the photovoltaic module to charge the energy storage module, and / or uses the city grid to charge the energy storage module during a period of low electricity prices;

[0114] Specifically, the central controller controls the city grid to charge the energy storage module during low electricity price periods, and controls the energy storage module to supply power to loads in the home grid during high electricity price periods, thereby improving electricity economy.

[0115] In a seventh embodiment of a method for a home energy storage system based on wireless communication proposed by the present invention, based on the third embodiment, the system further includes a smart socket, each load is connected to the home power grid through the smart socket, and the smart socket can wirelessly communicate with each module; step S130 further includes the following steps:

[0116] Step 710: The central controller classifies each load in the home power grid into essential loads and non-essential loads according to their power usage priority.

[0117] Specifically, the essential loads are loads necessary for maintaining family life and loads that are greatly affected by power outages, such as lights and refrigerators; the non-essential loads are loads that are not necessary for maintaining family life and loads that are less affected by power outages, such as televisions.

[0118] Step 720: The central controller determines whether the power supply of the home grid is sufficient;

[0119] Specifically, whether the power supply is sufficient is reflected in whether the municipal grid can supply power to the household grid, and whether the electric energy stored in the energy storage module can meet the power consumption of the household load within a certain period of time (such as 1 day), which can be obtained based on the average daily power consumption of the household load.

[0120] Step 720: If yes, the central controller controls each of the smart sockets to be in an open state;

[0121] Step 730: If not, the central controller controls the smart socket connected to the essential load to be in an open state, and controls the smart socket connected to the non-essential load to be in an off state;

[0122] Specifically, when the central controller determines that the power supply of the home grid is insufficient, only the non-essential loads are allowed to use electricity.

[0123] In an eighth embodiment of a method for a home energy storage system based on wireless communication proposed by the present invention, based on the third embodiment, the central controller is capable of connecting to a network to receive power outage information; step 130 further includes the following steps:

[0124] Step 810: The central controller obtains an estimated power outage period based on the power outage information;

[0125] Specifically, the power outage information includes the power outage time and range announced by the power company.

[0126] Step 820: The central controller controls the energy storage module to stop supplying power to the home grid during a second preset period (e.g., the past day) before the estimated power outage period, and controls the photovoltaic module and / or the mains grid to fully charge the energy storage module at the same time.

[0127] Specifically, after receiving the power outage information, the central controller will promptly control the energy storage module to fully replenish the power in order to cope with subsequent power outages.

[0128] In a ninth embodiment of a method for a home energy storage system based on wireless communication proposed by the present invention, based on the third embodiment, the system further includes an alarm module; the method further includes the following steps:

[0129] Step 910: The battery management unit monitors the status data of the energy storage battery, wherein the status data includes: battery voltage, current and temperature;

[0130] Step 920: When the battery management unit detects that the status data of the energy storage battery does not match the preset status data, the battery management unit issues a stop-operation instruction to the energy storage battery and generates an alarm message, wherein the preset status message is that the battery voltage exceeds a safe voltage range, the battery current exceeds a safe current range, and the battery temperature exceeds a safe temperature;

[0131] Specifically, the preset status information can be the safe voltage range, safe current range and safe temperature marked on the energy storage battery before leaving the factory, or it can be a manually set safe voltage range, safe current range and safe temperature, but the manually set parameters have a higher safety margin than the parameters marked on the energy storage battery before leaving the factory.

[0132] Step 930: The battery management unit sends the alarm information to the central controller;

[0133] Step 940: The central controller controls the alarm module to sound an alarm and sends the alarm information to the user terminal.

[0134] Specifically, the alarm module may be a buzzer, a warning light, etc., or a communicator capable of contacting a public security department (such as a police station, a fire department, etc.).

[0135] The present invention also proposes a home energy storage system based on wireless communication, and a method for applying the home energy storage system based on wireless communication; the system comprises an energy storage module, a photovoltaic module, an inverter, a central controller, a collection module, and a user terminal; the energy storage module, the photovoltaic module, the inverter, the central controller, the collection module, and the user terminal are respectively provided with a wireless communication unit for realizing wireless communication between the modules of the system;

[0136] The energy storage module includes a plurality of energy storage batteries and a battery management unit for monitoring and managing the energy storage batteries; the energy storage batteries are used to store electricity obtained from the photovoltaic module or the city grid;

[0137] The photovoltaic module is arranged outdoors to supply power to the household power grid and / or to charge the battery module;

[0138] The inverter is used to convert the direct current generated by the photovoltaic module and the direct current stored in the battery module into alternating current for use in the home power grid;

[0139] The central controller is used to receive and control the working status of the battery module, the photovoltaic module, the inverter and the acquisition module, and send the status information to the user terminal;

[0140] The acquisition module is used to collect power data in the home power grid;

[0141] The user terminal is used to receive system operating conditions fed back by the central controller and to issue instructions to the central controller.

[0142] The serial numbers of the above embodiments of the present invention are for description only and do not represent the advantages or disadvantages of the embodiments.

[0143] The above are only preferred embodiments of the present invention and are not intended to limit the patent scope of the present invention. All equivalent structural transformations made based on the contents of the present invention's description and drawings, or direct / indirect applications in other related technical fields, are included in the patent protection scope of the present invention.

Claims

1. A method for a home energy storage system based on wireless communication, characterized in that: Applicable to a home energy storage system based on wireless communication; the system is applied to a home power grid; the system includes a photovoltaic module, a central controller and a collection module; The photovoltaic module, the central controller and the acquisition module are respectively provided with wireless communication units capable of communicating with each other; the method comprises: The central controller establishes a wireless communication architecture based on each of the wireless communication units through wireless ad hoc networking technology; The acquisition module collects power data of the home power grid and sends the collected power data to the central controller based on the wireless communication architecture, wherein the power data includes the power consumption of the load and the power generation of the photovoltaic module; The central controller formulates a power dispatching strategy based on the power data sent by the acquisition device; The central controller dispatches the electricity consumption of the home power grid according to the power dispatching strategy.

2. The method of the home energy storage system based on wireless communication according to claim 1, characterized in that: The central controller establishes a wireless communication architecture based on each of the wireless communication units through wireless ad hoc networking technology, including: The central controller selects a wireless communication protocol of the wireless communication architecture according to the connection requirements of each module, wherein the connection requirements include: transmission range, energy loss and anti-interference ability, and the wireless communication protocols include Wi-Fi protocol, Bluetooth protocol and Zigbee protocol; The central controller selects a system topology of the wireless communication architecture according to the scale of the home power grid. The system topology includes: a star topology, a mesh topology, and a hybrid topology.

3. The method of the home energy storage system based on wireless communication according to claim 2, characterized in that: The system also includes an energy storage module, an inverter, and a user terminal; the energy storage module, the inverter, and the user terminal are respectively provided with wireless communication units capable of communicating with each other; the system also includes a gateway / bridge device for communication between different wireless communication protocols; the energy storage module includes a plurality of energy storage batteries, and a battery management unit for monitoring and managing the energy storage batteries; The central controller selects a wireless communication protocol of the wireless communication architecture according to the connection requirements of each module, including: The central controller communicates with the user terminal using the Wi-Fi protocol; The central controller controls the communication between the energy storage batteries, and between the energy storage batteries and the battery management unit using the Bluetooth protocol; The central controller controls the energy storage module, the photovoltaic module, the inverter and the acquisition module to communicate with each other using the Zigbee protocol.

4. The method of the home energy storage system based on wireless communication according to claim 3, characterized in that: The central controller establishes a wireless communication architecture based on each of the wireless communication units through wireless ad hoc networking technology, and then further includes: The central controller encrypts wireless communications between wireless communication units in the wireless communication architecture, including: When the user terminal sends the collected power data to the central controller, the central controller encrypts the data, wherein the data encryption includes encrypting the data at the transport layer and the application layer respectively; When the user terminal sends the collected power data to the central controller, the central controller performs identity authentication on the user terminal, wherein the identity authentication includes two-factor authentication and digital certificate; When the user terminal logs in or performs an operation, the central controller generates a unique password to verify the login or operation of the user terminal; When the user terminal sends the collected power data to the central controller, the central controller sets a defense mechanism, wherein the defense mechanism includes setting a network intrusion detection and a firewall.

5. The method of the home energy storage system based on wireless communication according to claim 3, characterized in that: The central controller is capable of connecting to the network to receive dynamic electricity price information and weather forecast information; The central controller formulates a power dispatching strategy based on the power data sent by the acquisition device, including: The central controller generates a power consumption prediction model based on the power consumption of each load in the home power grid during a first preset period of time in the past; The central controller uses the power consumption prediction model to predict the power consumption of each load in a second preset time period in the future; The central controller predicts the power generation of the photovoltaic module in a second preset time period in the future based on weather forecast information; The central controller determines whether the sum of the stored electricity of the energy storage module and the power generation of the photovoltaic module in the second preset time period in the future can meet the electricity consumption in the second preset time period in the future; If so, the central controller controls the energy storage module and / or the photovoltaic module to supply power to the home grid during the second preset period in the future; If not, the central controller divides the day into a high electricity price period and a low electricity price period according to the dynamic electricity price information; During periods of high electricity prices, the central controller controls the energy storage module and / or the photovoltaic module to supply power to the home grid; During low electricity price periods, the central controller controls access to the city grid to supply power to the household grid.

6. The method of the home energy storage system based on wireless communication according to claim 5, characterized in that: The central controller formulates a power dispatching strategy based on the power data sent by the acquisition device, and further includes: The central controller determines whether the energy storage module is fully charged; If so, the central controller controls the energy storage module to stop charging; If not, the central controller controls the photovoltaic module to charge the energy storage module, and / or uses the city grid to charge the energy storage module during a period of low electricity prices.

7. The method of the home energy storage system based on wireless communication according to claim 3, characterized in that: The system also includes a smart socket, through which each load is connected to the home power grid, and the smart socket can wirelessly communicate with each module; The central controller formulates a power dispatching strategy based on the power data sent by the acquisition device, and further includes: The central controller classifies each load into essential loads and non-essential loads according to the power usage priority of each load in the home power grid; The central controller determines whether the power supply of the home grid is sufficient; If so, the central controller controls each of the smart sockets to be in an open state; If not, the central controller controls the smart socket connected to the essential load to be in an open state, and controls the smart socket connected to the non-essential load to be in a closed state.

8. The method of the home energy storage system based on wireless communication according to claim 3, characterized in that: The central controller is capable of connecting to a network to receive power outage information; The central controller formulates a power dispatching strategy based on the power data sent by the acquisition device, and further includes: The central controller obtains an estimated power outage period based on the power outage information; The central controller controls the energy storage module to stop supplying power to the home grid during a second preset period before the estimated power outage period, and controls the photovoltaic module and / or the mains grid to fully charge the energy storage module simultaneously.

9. The method of the home energy storage system based on wireless communication according to claim 3, characterized in that: The system further includes an alarm module; and the method further includes: The battery management unit monitors the status data of the energy storage battery, wherein the status data includes: battery voltage, current and temperature; When the battery management unit detects that the status data of the energy storage battery does not match the preset status data, the battery management unit sends a stop-operation instruction to the energy storage battery and generates an alarm message, wherein the preset status information is that the battery voltage exceeds the safe voltage range, the battery current exceeds the safe current range, and the battery temperature exceeds the safe temperature; The battery management unit sends the alarm information to the central controller; The central controller controls the alarm module to sound an alarm and sends the alarm information to the user terminal.

10. A home energy storage system based on wireless communication, characterized in that: A method for applying a wireless communication-based home energy storage system according to any one of claims 1 to 9; the system comprises an energy storage module, a photovoltaic module, an inverter, a central controller, a collection module, and a user terminal; the energy storage module, the photovoltaic module, the inverter, the central controller, the collection module, and the user terminal are respectively provided with a wireless communication unit for realizing wireless communication between the modules of the system; The energy storage module includes a plurality of energy storage batteries and a battery management unit for monitoring and managing the energy storage batteries; the energy storage batteries are used to store electricity obtained from the photovoltaic module or the city grid; The photovoltaic module is arranged outdoors to supply power to the household power grid and / or to charge the battery module; The inverter is used to convert the direct current generated by the photovoltaic module and the direct current stored in the battery module into alternating current for use in the home power grid; The central controller is used to receive and control the working status of the battery module, the photovoltaic module, the inverter and the acquisition module, and send the status information to the user terminal; The acquisition module is used to collect power data in the home power grid; The user terminal is used to receive system operating conditions fed back by the central controller and to issue instructions to the central controller.

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