Household energy storage cabinet

Abstract

The invention relates to the technical field of household energy storage cabinets, and provides a household energy storage cabinet, a battery module and a central control system are arranged in a cabinet body, the battery module is electrically connected with the central control system, the battery module is composed of at least one independently pluggable battery unit, and the central control system is electrically connected with the battery module. The central control system comprises an energy management unit, a power conversion unit, an intelligent control unit and a man-machine interaction unit, and the energy management unit is connected with the battery module and used for monitoring and managing the state of each battery unit in real time; the power conversion unit is respectively connected with an external power grid, a household load and a battery module, and is used for realizing bidirectional energy conversion of AC / DC and DC / DC; the intelligent control unit is in communication connection with the energy management unit, the power conversion unit and an external network, and is used for controlling the flow direction and size of energy according to a preset strategy and real-time data; and the man-machine interaction unit is connected with the intelligent control unit and is used for displaying the equipment state to a user and receiving a user instruction.

Description

Technical Field

[0001] This invention relates to the field of household energy storage cabinet technology, and in particular to a household energy storage cabinet. Background Technology

[0002] The implementation of smart grids and time-of-use pricing policies has made energy management increasingly urgent for residential users. As a key hub connecting energy production, the power grid, and household consumption, the importance of home energy storage cabinets is becoming increasingly prominent.

[0003] For example, a household energy storage cabinet disclosed in application number CN202322655181.9 includes: a cabinet body, a cabinet door rotatably connected to the cabinet body, a partition fixedly installed inside the cabinet body, a fan fixedly installed inside the cabinet body, and a cooling air guide assembly for guiding air and cooling the air; the cooling air guide assembly consists of a ventilation plate, a heat dissipation plate, and a cooling plate rotatably connected to the cabinet body.

[0004] For example, a household energy storage cabinet disclosed in application number CN202321958219.3 includes: a cabin body, with an internal connecting plate extending inward from the upper end of the cabin body; a cover, with three external connecting plates extending from the lower end of the cover, the external connecting plates being sleeved on the internal connecting plates and then fixed on the side by screws to form a edging structure; and a display panel, which is connected to one side of the cabin body, with an inclined state plate at the upper part of the display panel, and a hook provided at the lower part of the end of the cover where the external connecting plates do not extend, the hook engaging with the inclined state plate.

[0005] However, existing home energy storage cabinets only have simple charging and discharging functions and lack the ability to intelligently analyze and adaptively schedule users' electricity consumption habits, electricity price fluctuations, and weather changes, thus failing to achieve optimal energy utilization. Summary of the Invention

[0006] To address the aforementioned problems, this invention provides a household energy storage cabinet.

[0007] To achieve the above objectives, the present invention provides the following technical solution: A home energy storage cabinet includes: a cabinet body, a battery module, and a central control system. The battery module and the central control system are housed within the cabinet body and are electrically connected. The battery module consists of at least one independently pluggable battery cell, which includes a battery cell, a battery management system, and an electrical and mechanical interface. The central control system includes: an energy management unit, a power conversion unit, an intelligent control unit, and a human-machine interface unit. The energy management unit is connected to the battery module and is used to monitor and manage the status of each battery cell in real time, including voltage, current, temperature, and health. The power conversion unit is connected to the external power grid, the home load, and the battery module to achieve bidirectional energy conversion between AC / DC and DC / DC. The intelligent control unit is communicatively connected to the energy management unit, the power conversion unit, and the external network to control the direction and magnitude of energy flow based on preset strategies and real-time data. The human-machine interface unit is connected to the intelligent control unit and is used to display the device status to the user and receive user commands.

[0008] Preferably, the intelligent control unit has a built-in energy scheduling algorithm that can receive and analyze external data, including time-of-use electricity price information, weather forecast data, and user electricity consumption habit data. By using user electricity consumption habit data, the algorithm predicts the household electricity load curve for a future period of time. Based on the above information, it automatically generates and executes the optimal charging and discharging strategy to minimize electricity costs or maximize photovoltaic self-consumption rate.

[0009] Preferably, the energy management unit implements a multi-level safety protection strategy, including cell-level protection, module-level protection, and system-level protection. The cell-level protection monitors the voltage and temperature of individual cells through sensors integrated on each cell or cell group. The module-level protection provides overcharge, over-discharge, overcurrent, and short-circuit protection for individual battery cells through the battery management system. The system-level protection enables the central control system to quickly disconnect the main circuit between the power conversion unit and the battery module when a system-level anomaly is detected.

[0010] Preferably, the electrical and mechanical interfaces of the battery cell include a power interface, a communication interface, and a cooling medium interface, and support hot-swapping operation.

[0011] Preferably, it further includes a thermal management unit, which adopts liquid cooling or air cooling. Its cooling pipes or air ducts are connected to the cooling medium interface of each battery cell. The intelligent control unit dynamically adjusts the cooling intensity according to the real-time temperature data of the battery module to maintain the battery operating temperature within the optimal range.

[0012] Preferably, the human-machine interaction unit includes a touch screen and a mobile application, through which users can remotely monitor the operating status, remaining power, charging and discharging power, and historical data of the energy storage cabinet, and manually set the working mode.

[0013] An energy management method for a home energy storage cabinet includes the following steps: S1: Real-time collection of battery module status data, external power grid electricity price data, household load electricity consumption data, and photovoltaic power generation data; S2: Based on historical electricity consumption data and user habits, predict household electricity load for the next 24 hours using energy dispatch algorithms; S3: Generates the optimal charging and discharging plan by integrating battery status, electricity price, load forecast, and weather information; S4: According to the generated plan, send instructions to the power conversion unit to control it to draw power from the grid to charge the battery and draw power from the battery to supply power to household loads; S5: Continuously monitors all critical parameters, and once a security threshold is triggered, immediately activates the corresponding protection measures and issues an alert to the user.

[0014] The advantages of this invention are as follows: The core of this invention lies in its modular battery design, which allows users to flexibly configure the number of battery cells according to actual power demand, thereby accurately meeting the energy supply needs of different households. On this basis, the intelligent control unit will automatically optimize energy scheduling and usage strategies based on the real-time status of the selected battery modules, which can not only significantly reduce household electricity expenses, but also greatly improve energy self-sufficiency. While achieving high efficiency and energy saving, the multi-level safety protection strategy built into the energy management unit eliminates safety hazards from the source, providing a solid guarantee for the long-term stable operation of the system. Finally, through the intuitive interface of the human-computer interaction unit, users can easily control the overall situation and achieve efficient interaction with the system, making complex energy management simple and convenient. Attached Figure Description

[0015] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings: Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the components of the various modules of the present invention; Figure 3 This is a functional diagram of each module within the central control system of the present invention; Figure 4 This is a flowchart illustrating the usage of the present invention.

[0016] Explanation of reference numerals in the attached figures: 1. Cabinet; 2. Battery module; 3. Central control system; 21. Battery unit. Detailed Implementation

[0017] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other.

[0018] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0019] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0020] Example 1, combined with Figures 1-4 Explanation: A household energy storage cabinet includes: a cabinet body 1, a battery module 2, and a central control system 3. The battery module 2 and the central control system 3 are disposed inside the cabinet body 1 and are electrically connected. The battery module 2 consists of at least one independently pluggable battery unit 21. The battery unit 21 includes a battery cell, a battery management system, and an electrical and mechanical interface. The battery unit 21 is prior art and will not be described in detail here.

[0021] The central control system 3 includes an energy management unit, a power conversion unit, an intelligent control unit, and a human-machine interaction unit. The energy management unit is connected to the battery module 2 and is used to monitor and manage the status of each battery cell 21 in real time, including voltage, current, temperature, and health. The power conversion unit is connected to the external power grid, the household load, and the battery module 2 to realize bidirectional energy conversion between AC / DC and DC / DC. The intelligent control unit is connected to the energy management unit, the power conversion unit, and the external network to control the direction and magnitude of energy flow according to preset strategies and real-time data. The human-machine interaction unit is connected to the intelligent control unit and is used to display the device status to the user and receive user commands.

[0022] The battery module 2 consists of multiple standardized, independently pluggable battery cells 21. The battery cells 21 use high-performance lithium iron phosphate or solid-state battery cells, allowing users to increase or decrease the energy storage capacity according to the current and future electricity needs of their households, thus achieving scalability and flexibility of investment.

[0023] The power conversion unit employs a topology structure to achieve bidirectional, efficient energy conversion between the AC grid, DC battery, and household loads, reducing energy loss during the conversion process. When the external power grid suddenly fails, the power conversion unit can detect and disconnect from the grid within 10 milliseconds, while seamlessly switching to battery module power supply mode to ensure uninterrupted operation of critical loads in the home, such as refrigerators and network devices.

[0024] The intelligent control unit has a built-in energy scheduling algorithm that can receive and analyze external data, including time-of-use electricity price information, weather forecast data, and user electricity consumption habit data. Combined with the built-in machine learning model, it analyzes users' electricity consumption habits and accurately predicts the electricity load for the next 24 hours. Based on this, the system will automatically calculate the optimal energy scheduling strategy.

[0025] The intelligent control unit connects to the home router via Wi-Fi and automatically obtains local time-of-use electricity pricing information. For example, 22:00-6:00 is off-peak electricity pricing. Simultaneously, the algorithm within the intelligent control unit learns that the household's peak electricity consumption period is typically 19:00-22:00. Based on this, the system automatically formulates a strategy: after 22:00 each day, it automatically starts charging, fully charging the battery from the grid at a low price; during the peak electricity consumption period of 19:00-22:00, it prioritizes using the battery's stored energy for household use, reducing the need to purchase higher-priced electricity from the grid. Users can monitor this process and the electricity savings at any time via a mobile app.

[0026] For example, it automatically charges from the grid during off-peak hours and uses the stored energy for household use during peak hours, thus saving on electricity bills; on sunny days, it prioritizes the use of photovoltaic power and stores excess power in batteries to maximize self-consumption; and when the grid experiences a power outage, it can seamlessly switch to backup power mode to ensure continuous power supply for critical household equipment.

[0027] The energy management unit implements a multi-level safety protection strategy, including cell-level protection, module-level protection, and system-level protection. The cell-level protection monitors the voltage and temperature of individual cells through sensors integrated on each cell or cell group. The module-level protection provides overcharge, over-discharge, overcurrent, and short-circuit protection for individual battery cells 21 through the battery management system. The system-level protection enables the central control system 3 to quickly disconnect the main circuit between the power conversion unit and the battery module 2 when a system-level anomaly is detected.

[0028] The electrical and mechanical interfaces of the battery cell 21 include a power interface, a communication interface, and a cooling medium interface, and support hot-swapping operation.

[0029] It also includes a thermal management unit, which adopts liquid cooling or air cooling. Its cooling pipes or air ducts are connected to the cooling medium interface of each battery cell 21. The intelligent control unit dynamically adjusts the cooling intensity according to the real-time temperature data of the battery module 2 to maintain the battery operating temperature in the optimal range. For example, when the intelligent control unit detects that the temperature of a certain module exceeds 45°C through the temperature sensor of the thermal management system, it will instruct the liquid cooling pump of the thermal management system to accelerate its operation and focus on cooling the module.

[0030] The human-machine interaction unit includes a touch screen and a mobile application. Users can remotely monitor the operating status, remaining power, charging and discharging power, and historical data of the energy storage cabinet through the mobile application, and manually set the working mode, such as the economic mode that pursues the maximum economic benefits, the backup power mode that prioritizes power supply, or the green mode that maximizes the use of green energy.

[0031] The working principle of this invention is as follows: When in use, the system starts up, each unit performs self-checks, and data is collected, including battery SOC, health status, real-time household power, electricity price, weather, etc. Load forecasting is performed, and the load curve for the next day is predicted based on historical data. Strategy generation is also performed. For example, if it is predicted that tomorrow will be sunny and there will be a peak in electricity prices in the afternoon, a strategy is generated to fully charge the photovoltaic system during the day and discharge it during the peak afternoon period. The control is executed, and the power conversion unit operates according to the strategy. The above steps are repeated, and safety monitoring is continuously performed. Once an abnormality is detected, the safety protection procedure is immediately executed.

[0032] For those skilled in the art, the present invention is not limited to the details of the exemplary embodiments described above, and can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention; therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Therefore, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0033] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any minor modifications, equivalent substitutions, and improvements made to the above embodiments based on the technical essence of the present invention should be included within the protection scope of the present invention.

Claims

1. A household energy storage cabinet, characterized in that, include: The system comprises a cabinet (1), a battery module (2), and a central control system (3). The battery module (2) and the central control system (3) are housed within the cabinet (1) and are electrically connected. The battery module (2) consists of at least one independently pluggable battery unit (21). The battery unit (21) includes a battery cell, a battery management system, and an electrical and mechanical interface. The central control system (3) includes an energy management unit, a power conversion unit, an intelligent control unit, and a human-machine interaction unit. The energy management unit is connected to the battery module (2) and is used for implementation. The system monitors and manages the status of each battery cell (21), including voltage, current, temperature and health. The power conversion unit is connected to the external power grid, household load and battery module (2) respectively to realize bidirectional energy conversion between AC / DC and DC / DC. The intelligent control unit is connected to the energy management unit, power conversion unit and external network respectively to control the direction and magnitude of energy flow according to preset strategies and real-time data. The human-machine interaction unit is connected to the intelligent control unit to display the device status to the user and receive user commands.

2. A household energy storage cabinet according to claim 1, characterized in that, The intelligent control unit has a built-in energy scheduling algorithm that can receive and analyze external data, including time-of-use electricity price information, weather forecast data, and user electricity consumption habit data. By using user electricity consumption habit data, it predicts the household electricity load curve for a future period of time. Based on the above information, it automatically generates and executes the optimal charging and discharging strategy to minimize electricity costs or maximize photovoltaic self-consumption rate.

3. A household energy storage cabinet according to claim 1, characterized in that, The energy management unit implements a multi-level safety protection strategy, including cell-level protection, module-level protection and system-level protection. The cell-level protection monitors the voltage and temperature of each cell through sensors integrated on each cell or cell group. The module-level protection protects individual battery cells (21) from overcharging, over-discharging, overcurrent and short circuit through the battery management system. The system-level protection enables the central control system (3) to quickly disconnect the main circuit between the power conversion unit and the battery module (2) when a system-level abnormality is detected.

4. A household energy storage cabinet according to claim 1, characterized in that, The electrical and mechanical interfaces of the battery cell (21) include a power interface, a communication interface and a cooling medium interface, and support hot-swap operation.

5. A household energy storage cabinet according to claim 4, characterized in that, Also includes: The thermal management unit adopts liquid cooling or air cooling. Its cooling pipes or air ducts are connected to the cooling medium interface of each battery cell (21). The intelligent control unit dynamically adjusts the cooling intensity according to the real-time temperature data of the battery module (2) to maintain the battery operating temperature in the optimal range.

6. A household energy storage cabinet according to claim 1, characterized in that, The human-machine interaction unit includes a touch screen and a mobile application. Users can remotely monitor the operating status, remaining power, charging and discharging power, and historical data of the energy storage cabinet through the mobile application, and manually set the working mode.

7. An energy management method based on a household energy storage cabinet according to any one of claims 1 to 6, characterized in that, Includes the following steps: S1: Real-time collection of status data of battery module (2), electricity price data of external power grid, electricity consumption data of household load and photovoltaic power generation data; S2: Based on historical electricity consumption data and user habits, predict household electricity load for the next 24 hours using energy dispatch algorithms; S3: Generates the optimal charging and discharging plan by integrating battery status, electricity price, load forecast, and weather information; S4: According to the generated plan, send instructions to the power conversion unit to control it to draw power from the grid to charge the battery and draw power from the battery to supply power to household loads; S5: Continuously monitors all critical parameters, and once a security threshold is triggered, immediately activates the corresponding protection measures and issues an alert to the user.

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