Household high-voltage energy storage system with energy redistribution and management method thereof

Abstract

The invention relates to the technical field of household energy storage, and discloses a household high-voltage energy storage system with energy redistribution, which comprises a plurality of modules, the plurality of modules are connected according to an up-and-down stacking sequence, one side of each module is provided with a ventilation valve, the modules are connected through connectors, and the connectors are connected with the modules. Each module also comprises a lithium battery module, an energy management system and a connector; the main control box is mounted on one side of the top and comprises a main control box BMS, a circuit breaker, a fuse, a PCS connector, a main control box and module connector, a main control box communication interface, a switch and a display screen; and the base is positioned on one side of one side and is used for being grounded to keep the system stable. The charging and discharging state and the residual capacity of each module are monitored in real time through the main control box BMS, and the energy management module can intelligently adjust the charging and discharging current according to the state difference of different modules, so that the service life of the battery pack is effectively prolonged, and meanwhile, the available power of the whole system is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of household energy storage, and in particular to a household high-voltage energy storage system with energy redistribution and a management method thereof. Background Art

[0002] Since Sony successfully developed the first commercial lithium-ion battery in 1992, lithium batteries have been widely used in portable electronic products due to their high energy density, long life, high platform voltage, and green environmental protection.

[0003] With the development of society, the changing international situation has aggravated the energy crisis, and the demand for household energy storage batteries has continued to increase. The use of household solar power generation devices, wind turbines and other energy production, as well as the low-cost electricity sources of the social power supply system to store surplus electricity in the energy storage system for use during peak hours can not only serve as an emergency power source, but also save electricity expenses for the family. However, the safety issues of household energy storage batteries are also urgently needed to be resolved. Battery overcharge, over discharge, over current, over temperature, etc. are all safety factors that affect battery performance.

[0004] In addition, different families have different needs for electricity consumption, and they need flexible capacity configuration and simple installation methods for home energy storage batteries with module energy management to meet the needs of each family for energy storage systems of different capacities. Existing home energy storage systems have poor scalability, and the power balance between modules needs to be performed before installation, which makes home use difficult.

[0005] To this end, those skilled in the art provide a household high-voltage energy storage system with energy redistribution and a management method thereof to solve the problems raised in the above background technology. Summary of the invention

[0006] In view of the deficiencies of the prior art, the present invention provides a household high-voltage energy storage system with energy redistribution and a management method thereof, which solves the problems of poor scalability and the need for manual adjustment in the prior art.

[0007] To achieve the above objectives, the present invention is implemented through the following technical solutions: A household high-voltage energy storage system with energy redistribution, comprising:

[0008] Multiple modules, the multiple modules are connected in an up-and-down stacking order, each of which is equipped with a vent valve on one side, the modules are connected by a connector, and each module further includes a lithium battery module, an energy management system and a connector;

[0009] The main control box is installed on the side described at the top, and includes the main control box BMS, circuit breakers, fuses, PCS connectors, main control box and module connectors, main control box communication interface, switches and display screens;

[0010] A base, which is located on one of the sides, is used for grounding to keep the system stable.

[0011] Preferably, the main control box BMS is a host BMS, and the energy management system in the remaining modules includes a slave BMS, a DCDC boost module, and a wireless data RF module.

[0012] Preferably, a plurality of the modules are connected in parallel via a connector and then connected in series with a circuit breaker, a switch and a PCS connector in the topmost main control box, and the PCS connector is externally connected to a PCS inverter.

[0013] Preferably, the main control box BMS has a built-in wireless data RF module, which performs wireless data communication with the energy management system in each module via Bluetooth to obtain the working status of each module;

[0014] The main control box communication interface is connected to communicate with the PCS inverter.

[0015] Preferably, addresses are automatically allocated between the plurality of modules, wherein the address of the module at the top layer is automatically set to 1, and the order of module installation is not fixed.

[0016] Preferably, the voltage of the lithium battery module in the module is 48V, which is boosted to 300V by an energy management system, and the energy management system includes a BMS function;

[0017] The CCS in the lithium battery module contains a wireless data RF module, which uses a wireless communication protocol to transmit data with the energy management system.

[0018] Preferably, the main control box BMS adjusts the working state of the household energy storage battery according to the set threshold value;

[0019] The boost module in the main control box BMS boosts the output voltage of the module to 600V and is connected to the PCS inverter through the PCS connector.

[0020] Preferably, the modules are connected in parallel, and the energy management system can independently control the charging and discharging status of a single module and support plug-and-play of new modules.

[0021] Preferably, the main control box BMS has a built-in WIFI module;

[0022] The emergency communication interface reserved by the module automatically switches to a physical connection communication mode after the wireless communication function fails.

[0023] A method for managing a household high-voltage energy storage system with energy redistribution, for a household high-voltage energy storage system with energy redistribution, comprising the following steps:

[0024] System startup: The user starts the home high-voltage energy storage system by pressing the switch on the main control box, and the main control box BMS starts to supply power and initialize the system; after the system self-check is completed, the main control box BMS activates all modules and automatically assigns addresses to each module. The address of the top module is automatically set to 1;

[0025] Battery status detection: The main control box BMS communicates with the energy management system in each module through the wireless data RF module to obtain the lithium battery module status of each module in real time, including voltage, power, temperature and other information; the system detects the initial status of each module to ensure that all modules in the system are in normal working condition;

[0026] Charging management: When the system detects that the battery power is lower than the set threshold, the main control box BMS controls the energy management system of each module through instructions to start the charging mode; the energy management system independently manages the charging current and voltage of each module according to the instructions of the main control box BMS to ensure safe and efficient charging of the battery;

[0027] Energy distribution: During the operation of the energy storage system, the main control box BMS dynamically adjusts the charging and discharging sequence and current of each module according to the household electricity demand and the power status of each module. Through the wireless data RF module, the main control box BMS maintains communication with the energy management system to ensure that energy is reasonably distributed among the modules to optimize system efficiency.

[0028] Voltage boost: When it is detected that power needs to be supplied to external loads, the main control box BMS starts the built-in boost module to boost the module output voltage from 300V to 600V. The main control box BMS outputs the boosted power through the PCS connector to the external PCS inverter to meet the household power needs;

[0029] Real-time monitoring: During system operation, the main control box BMS continuously monitors the operating status of the entire system, and transmits data to the display screen and uploads it to the WEB website and mobile phone APP through the WIFI module, so that users can view the battery power, system status and alarm information in real time;

[0030] Emergency shutdown: If a system abnormality occurs, the main control box BMS will immediately cut off the circuit breaker, stop the system power supply, and notify the user through the display and APP. The user can also manually press the switch to perform an emergency shutdown;

[0031] System shutdown: When the energy storage system is not needed, the user can shut down the system by pressing the switch on the main control box. The main control box BMS shuts down the power supply to all modules and related components, and the system enters standby or shutdown state, waiting for the next startup.

[0032] Working principle: Connect multiple modules in a stacked order, with the bottom layer as the base. Each module includes a lithium battery module, an energy management system and a connector, and the upper and lower modules are connected through connectors. The top-level main control box is installed on the module. The main control box includes the main control box BMS, circuit breaker, fuse, PCS connector, main control box and module connector, main control box communication interface, switch and display screen.

[0033] After the system is powered on, the main control box BMS starts and automatically assigns addresses to all modules, and the address of the top module is automatically set to 1. The installation order of the modules is not fixed and the positions can be changed at will. Each module communicates with the main control box BMS through the wireless data RF module to complete the address assignment. The voltage of the lithium battery module in the module is 48V, and the voltage is boosted to 300V through the DCDC boost module in the energy management system. The energy management system includes BMS functions, and realizes data transmission with the main control box BMS through the wireless data RF module in CCS.

[0034] The main control box BMS adjusts the working state of the energy storage battery according to the threshold set by the system, further boosts the output voltage of the module to 600V through the built-in boost module, and connects to the PCS inverter through the PCS connector to meet the input voltage requirements of different PCS inverters. During system operation, the energy management system independently controls the charging and discharging state of each module. All modules are connected in parallel through connectors and in series with the circuit breakers, switches and PCS connectors in the main control box to achieve efficient management and distribution of energy.

[0035] In scenarios where capacity expansion is required, the energy storage capacity can be increased by adding new modules. No pre-charging or SOC calibration is required for capacity expansion. The new modules are plug-and-play, and the system automatically recognizes and works in sync with the existing system. The main control box BMS has a built-in WIFI module. Customers can view the real-time status of the energy storage system, including power, operating status, and alarm information, through the WEB website and mobile phone APP. The main control box BMS can also display the operation and alarm status of the system in real time on the display screen. When the wireless communication function fails, the emergency communication interface in the module can communicate with the main control box through a physical connection to ensure that the energy storage system can still be monitored and managed during troubleshooting and system maintenance.

[0036] The present invention provides a household high-voltage energy storage system with energy redistribution and a management method thereof. It has the following beneficial effects:

[0037] 1. The present invention monitors the charge and discharge status and remaining capacity of each module in real time through the main control box BMS. The energy management module can intelligently adjust the charge and discharge current according to the status differences of different modules to achieve independent charge and discharge management of each module. This function ensures that the power of all modules is at the same level, effectively prolongs the service life of the battery pack, and at the same time improves the overall available power of the system.

[0038] 2. The energy management module in the module of the present invention has a boost function, which increases the voltage of the lithium battery module from 48V to 300V, and then the boost module in the main control box further increases the voltage to 600V. Through this design, the system can reduce current transmission while maintaining the same power output, thereby reducing energy loss in the wire and greatly improving energy conversion efficiency. At the same time, the 48V low voltage design ensures production safety.

[0039] 3. The present invention adopts wireless data RF module to realize seamless data transmission between the module and the main control box, replacing the traditional wired connection. This not only eliminates the complexity brought by physical cables, but also greatly improves the anti-interference ability of the system and simplifies the assembly and maintenance process. In addition, the system supports automatic addressing function, and the new module can be plug-and-play without pre-charging or calibration, which greatly improves the scalability and flexibility of the system.

[0040] 4. The present invention can dynamically adjust its working mode according to the overall system requirements, such as giving priority to compensating low-power modules or reducing the load of high-temperature modules. This distributed energy management method makes the system more flexible and efficient, significantly improves energy utilization and system stability, and adapts to diverse power usage scenarios and needs. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 It is a three-dimensional assembly schematic diagram of the present invention;

[0042] Figure 2 It is a schematic diagram of the internal structure of the module of the present invention;

[0043] Figure 3 It is a schematic diagram of the internal structure of the main control box of the present invention;

[0044] Figure 4 This is a schematic diagram of the external structure of the main control box of the present invention;

[0045] Figure 5 It is a flow chart of the control method of the present invention.

[0046] Among them, 1. Main control box; 2. Module; 3. Base; 4. Lithium battery module; 5. Energy management system; 6. Ventilation valve; 7. Connector; 8. Emergency communication interface; 9. Main control box BMS; 10. Circuit breaker; 11. Fuse; 12. PCS connector; 13. Main control box and module connector; 14. Main control box communication interface; 15. Switch; 16. Display screen. DETAILED DESCRIPTION

[0047] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0048] Embodiment 1:

[0049] Please see attached Figure 1 , an embodiment of the present invention provides a household high-voltage energy storage system with energy redistribution, which includes a plurality of modules 2, and the modules 2 are connected in an upper and lower stacking order, and each module is connected to each other through a connector 7. Each module 2 includes a lithium battery module 4, an energy management system 5 and a connector 7, and these components together realize the storage, management and output functions of electric energy. The top-level main control box 1 is installed on the module 2, and the main control box 1 is provided with a main control box BMS9, which is used for the management and control of the entire system; the circuit breaker 10 and the fuse 11 are used for circuit protection to prevent overcurrent and short circuit;

[0050] The PCS connector 12 is used to connect an external PCS inverter to achieve power conversion and output; the main control box and module connector 13 is used to connect the main control box and the module; the main control box communication interface 14 is used to communicate with external devices or systems; the switch 15 is used to start and shut down the system, and the display screen 16 is used to display the system's operating status and related information. The base 3 is located at the bottom of the module 2, and plays a role in supporting and fixing the entire system to ensure that the system remains stable during operation.

[0051] Please see attached Figure 2In the embodiment of the present invention, the function of the main control box BMS9 is further described in detail. The main control box BMS9 is the host BMS of the system, responsible for the coordination and management of the entire energy storage system, and the energy management system 5 in the module 2 includes a slave BMS, a DCDC boost module and a wireless data RF module. Through this master-slave architecture, the main control box BMS9 can monitor and adjust the working status of each module in real time, and the DCDC boost module ensures that the voltage output by the battery module meets the requirements of system operation. The application of the wireless data RF module enables data communication between modules in a wireless manner, avoiding the complexity and potential failure points brought by traditional wired connections.

[0052] Please see attached Figure 3 In the embodiment of the present invention, the electrical connection method between the modules 2 is further described. Multiple modules 2 are connected in parallel through connector 7. This connection method enables the system to flexibly expand capacity and ensure stable output of electric energy. The outputs of all modules 2 are collected through connector 7 and then connected in series with the circuit breaker 10, switch 15 and PCS connector 12 in the main control box 1. Through the PCS connector 12, the electric energy in the system is converted into AC or DC suitable for home use by an external PCS inverter to meet the needs of different types of electrical equipment.

[0053] Please see attached Figure 3 In the embodiment of the present invention, the communication mechanism between the main control box BMS9 and the module 2 is further described. The main control box BMS9 has a built-in wireless data RF module, which communicates wirelessly with the energy management system 5 in each module 2 via Bluetooth. The main control box BMS9 can obtain the working status of each module 2 in real time, including power, temperature, voltage and other information. Through the main control box communication interface 14, the main control box BMS9 can also communicate with an external PCS inverter or other management system to achieve real-time transmission and remote monitoring of system data.

[0054] Please see attached Figure 1 In the embodiment of the present invention, the address allocation and installation flexibility of the module 2 are further described. After the system is started, addresses are automatically allocated between all modules 2, and the address of the top module 2 is automatically set to 1. Since the system adopts an automatic address allocation mechanism, the installation order of each module 2 is not fixed, and the user can change the installation order of the modules at will according to actual needs, which provides great flexibility for the installation and maintenance of the system, and also simplifies the operation of expanding the system capacity.

[0055] Please see attached Figure 2In the embodiment of the present invention, the voltage management inside the module 2 is further described. The nominal voltage of the lithium battery module 4 in each module 2 is 48V, and the voltage is increased to 300V by the DCDC boost module in the energy management system 5. The energy management system 5 is not only responsible for the voltage increase, but also has a BMS function, which can monitor and manage the charging and discharging process of the battery. The CCS in the lithium battery module 4 includes a wireless data RF module, which transmits data with the energy management system 5 through a wireless communication protocol to achieve real-time monitoring and adjustment of the battery status, ensuring efficient operation of the system.

[0056] Please see attached Figure 1 -Attached Figure 2 In the embodiment of the present invention, the voltage boost and power supply management of the system are further described. During the operation of the system, the main control box BMS9 adjusts the working state of the energy storage battery according to the preset threshold value, and further boosts the output voltage of multiple modules 2 from 300V to 600V through the built-in boost module. The boosted voltage is output to the PCS inverter through the PCS connector 12 to meet the input voltage requirements of different types of loads and realize efficient conversion and use of electric energy.

[0057] Please see attached Figure 1 -Attached Figure 2 In the embodiment of the present invention, the parallel design and modular expansion capability of the system are further described. The modules 2 are kept in parallel, and the energy management system 5 of each module 2 can independently control the charging and discharging status of a single module. The system supports plug-and-play function, and users can add new modules 2 at any time according to needs without complicated settings. After the new module is inserted, it can automatically work synchronously with the existing system. In addition, the built-in WIFI module of the main control box BMS9 allows users to remotely view the real-time status of the system through a WEB website or a mobile phone APP. When the wireless communication function fails, the emergency communication interface 8 in the module 2 can automatically switch to a physical connection communication mode to ensure the continuous operation and troubleshooting of the system.

[0058] Embodiment 2:

[0059] Please see attached Figure 5 , an embodiment of the present invention provides a method for managing a household high-voltage energy storage system with energy redistribution, comprising the following steps:

[0060] System startup: The user starts the household high-voltage energy storage system by pressing the switch 15 on the main control box 1, and the main control box BMS9 starts to supply power and initialize the system; after the system self-check is completed, the main control box BMS9 activates all modules 2 and automatically assigns an address to each module 2, and the module address of the top layer is automatically set to 1;

[0061] Battery status detection: The main control box BMS9 communicates with the energy management system 5 in each module 2 through the wireless data RF module to obtain the status of the lithium battery module 4 of each module 2 in real time, including voltage, power, temperature and other information; the system detects the initial status of each module 2 to ensure that all modules 2 in the system are in normal working condition;

[0062] Charging management: When the system detects that the battery power is lower than the set threshold, the main control box BMS9 controls the energy management system 5 of each module 2 through instructions to start the charging mode; the energy management system 5 independently manages the charging current and voltage of each module 2 according to the instructions of the main control box BMS9 to ensure safe and efficient charging of the battery;

[0063] Energy distribution: During the operation of the energy storage system, the main control box BMS9 dynamically adjusts the charging and discharging sequence and current of each module 2 according to the household electricity demand and the power status of each module 2. Through the wireless data RF module, the main control box BMS9 maintains communication with the energy management system 5 to ensure that energy is reasonably distributed among the modules to optimize system efficiency;

[0064] Voltage boost: When it is detected that power needs to be supplied to an external load, the main control box BMS9 starts the built-in boost module to boost the voltage output by module 2 from 300V to 600V. The main control box BMS9 outputs the boosted electric energy to the external PCS inverter through the PCS connector 12 to meet the household power demand;

[0065] Real-time monitoring: During the operation of the system, the main control box BMS9 continuously monitors the operating status of the entire system, and transmits the data to the display screen 16 and uploads it to the WEB website and mobile phone APP through the WIFI module, so that users can view the battery power, system status and alarm information in real time;

[0066] Emergency shutdown: If a system abnormality such as overvoltage, overcurrent, short circuit, etc. occurs, the main control box BMS9 will immediately cut off the circuit breaker 10, stop the system power supply, and notify the user through the display screen 16 and APP. The user can also manually press the switch 15 to perform an emergency shutdown;

[0067] System shutdown: When the energy storage system is not needed, the user can shut down the system by pressing the switch 15 on the main control box 1. The main control box BMS9 shuts down the power supply to all modules 2 and related components, and the system enters the standby or shutdown state, waiting for the next startup.

[0068] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A household high-voltage energy storage system with energy redistribution, characterized in that: include: A plurality of modules (2), wherein the plurality of modules (2) are connected in an up-and-down stacking order, each module (2) is provided with a vent valve (6) on one side, the modules (2) are connected to each other via a connector (7), and each module (2) further comprises a lithium battery module (4), an energy management system (5) and a connector (7); A main control box (1), installed on one side of the top (2), comprises a main control box BMS (9), a circuit breaker (10), a fuse (11), a PCS connector (12), a main control box and a module connector (13), a main control box communication interface (14), a switch (15) and a display screen (16); The base (3) is located on one side of one of the (2) and is used for grounding to keep the system stable.

2. A household high-voltage energy storage system with energy redistribution according to claim 1, characterized in that: The main control box BMS (9) is a host BMS, and the energy management system (5) in the remaining modules (2) includes a slave BMS, a DCDC boost module, and a wireless data RF module.

3. A household high-voltage energy storage system with energy redistribution according to claim 1, characterized in that: A plurality of the modules (2) are connected in parallel via a connector (7), and then connected in series with a circuit breaker (10), a switch (15) and a PCS connector (12) in the topmost main control box (1), wherein the PCS connector (12) is externally connected to a PCS inverter.

4. A household high-voltage energy storage system with energy redistribution according to claim 1, characterized in that: The main control box BMS (9) has a built-in wireless data RF module, which performs wireless data communication with the energy management system (5) in each module (2) via Bluetooth to obtain the working status of each module (2); The main control box communication interface (14) is connected to communicate with the PCS inverter.

5. A household high-voltage energy storage system with energy redistribution according to claim 1, characterized in that: Addresses are automatically allocated between the plurality of modules (2), wherein the address of the topmost module (2) is automatically set to 1, and the order of module installation is not fixed.

6. A household high-voltage energy storage system with energy redistribution according to claim 1, characterized in that: The voltage of the lithium battery module (4) in the module (2) is 48V, which is boosted to 300V by an energy management system (5), and the energy management system (5) includes a BMS function; The CCS in the lithium battery module (4) includes a wireless data RF module, and uses a wireless communication protocol to transmit data with the energy management system (5).

7. A household high-voltage energy storage system with energy redistribution according to claim 1, characterized in that: The main control box BMS (9) adjusts the working state of the household energy storage battery according to the set threshold value; The boost module in the main control box BMS (9) boosts the output voltage of the module (2) to 600V and is connected to the PCS inverter via the PCS connector (12).

8. A household high-voltage energy storage system with energy redistribution according to claim 1, characterized in that: The modules (2) are maintained in a parallel state, and the energy management system (5) can independently control the charging and discharging state of a single module (2) and supports plug-and-play of new modules (2).

9. A household high-voltage energy storage system with energy redistribution according to claim 1, characterized in that: The main control box BMS (9) has a built-in WIFI module; The emergency communication interface (8) reserved by the module (2) automatically switches to a physical connection communication mode after the wireless communication function fails.

10. A method for managing a household high-voltage energy storage system with energy redistribution, used in a household high-voltage energy storage system with energy redistribution according to any one of claims 1 to 9, characterized in that: The following steps are involved: System startup: The user starts the household high-voltage energy storage system by pressing the switch (15) on the main control box (1), and the main control box BMS (9) starts to supply power and initialize the system; after the system self-check is completed, the main control box BMS (9) activates all modules (2) and automatically assigns an address to each module (2), and the address of the top module is automatically set to 1; Battery status detection: The main control box BMS (9) communicates with the energy management system (5) in each module (2) through a wireless data RF module to obtain the status of the lithium battery module (4) of each module (2) in real time, including voltage, power, temperature and other information; the system detects the initial status of each module (2) to ensure that all modules (2) in the system are in normal working condition; Charging management: When the system detects that the battery power is lower than a set threshold, the main control box BMS (9) controls the energy management system (5) of each module (2) through instructions to start the charging mode; the energy management system (5) independently manages the charging current and voltage of each module (2) according to the instructions of the main control box BMS (9) to ensure safe and efficient charging of the battery; Energy distribution: During the operation of the energy storage system, the main control box BMS (9) dynamically adjusts the charging and discharging sequence and current of each module (2) according to the household electricity demand and the power status of each module (2). Through the wireless data RF module, the main control box BMS (9) maintains communication with the energy management system (5) to ensure that energy is reasonably distributed among the modules to optimize system efficiency; Voltage boost: When it is detected that power needs to be supplied to an external load, the main control box BMS (9) starts the built-in boost module to boost the voltage output by the module (2) from 300V to 600V. The main control box BMS (9) outputs the boosted electric energy to the external PCS inverter through the PCS connector (12) to meet the household power demand; Real-time monitoring: During the operation of the system, the main control box BMS (9) continuously monitors the operating status of the entire system, and transmits the data to the display screen (16) and uploads it to the WEB website and mobile phone APP through the WIFI module, so that users can view the battery power, system status and alarm information in real time; Emergency shutdown: If a system abnormality (such as overvoltage, overcurrent, short circuit, etc.) occurs, the main control box BMS (9) will immediately cut off the circuit breaker (10), stop the system power supply, and notify the user through the display screen (16) and APP. The user can also manually press the switch (15) to perform an emergency shutdown; System shutdown: When the energy storage system is not needed, the user can shut down the system by pressing the switch (15) on the main control box (1). The main control box BMS (9) shuts down the power supply to all modules (2) and related components, and the system enters the standby or shutdown state, waiting for the next startup.

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