Photovoltaic energy storage power supply system

Abstract

The utility model provides a photovoltaic energy storage power supply system which comprises a light storage cabinet, an energy management system, an energy storage cloud platform connected with the energy management system, a light storage inverter, a battery management system, a temperature management device and a battery cluster connected with the energy management system through the battery management system. The photovoltaic array, the power supply system, the energy management system, the optical storage inverter, the battery management system, the temperature management equipment and the battery cluster which are connected with the optical storage inverter are arranged in a cabinet body of the optical storage cabinet; and the energy management system is used as a control center of the photovoltaic energy storage power supply system, accesses data of the battery management system, the optical storage inverter and the temperature management equipment, enables operation and maintenance personnel to remotely query real-time and historical information of the energy management system through the energy storage cloud platform, and controls the energy management system to perform charging and discharging operation. Through the integrated design, the problems of the photovoltaic energy storage power supply system in the aspects of space occupation and communication scheduling are effectively solved.

Description

Technical Field

[0001] This application relates to the field of photovoltaic energy storage, and particularly to a photovoltaic energy storage power supply system. Background Art

[0002] Photovoltaic power generation is a renewable and clean energy source that can be conveniently arranged anywhere with sunlight, which is its advantage. Its disadvantages are low energy density and poor stability. Energy storage can just right solve the disadvantages of photovoltaic power generation, enabling photovoltaic power generation to achieve the goal of "self-generation and self-use, and storing surplus electricity", thereby maximizing the utilization of clean energy.

[0003] When the photovoltaic power generation charges the energy storage, the photovoltaic array, photovoltaic inverter, municipal power grid power supply, energy storage converter, and battery cabinet are connected in sequence; when the energy storage discharges to the municipal power load, the battery cabinet, energy storage converter, and municipal power load are connected in sequence. The photovoltaic inverter and the energy storage converter are placed in different locations, the connection cables are long, and the occupied space is large, so that when communicating and dispatching, instructions need to be sent to the two devices separately, and the dispatching is inconvenient.

[0004] Based on this, there is an urgent need for a photovoltaic energy storage power supply system to solve the problems existing in the above-mentioned prior art. Utility Model Content

[0005] The purpose of this application is to solve the problems of large occupied space and inconvenient communication and dispatching of the photovoltaic energy storage power supply system.

[0006] To achieve the above purpose, this application adopts the following technical solutions:

[0007] This application provides a photovoltaic energy storage power supply system, including a photovoltaic energy storage cabinet, an energy management system, an energy storage cloud platform, a photovoltaic energy storage inverter, a battery management system, and a temperature management device connected to the energy management system. It also includes a battery cluster connected to the energy management system through the battery management system, a photovoltaic array and a power supply system connected to the photovoltaic energy storage inverter. The energy management system, photovoltaic energy storage inverter, battery management system, temperature management device, and battery cluster are arranged in the cabinet of the photovoltaic energy storage cabinet;

[0008] The energy management system is used as the control center of the photovoltaic energy storage power supply system, accesses the data of the battery management system, the photovoltaic energy storage inverter, and the temperature management device, and enables operation and maintenance personnel to remotely query the real-time and historical information of the energy management system through the energy storage cloud platform, and controls the energy management system to perform charge and discharge operations; the power supply system is used to provide the electric power required by the photovoltaic energy storage power supply system.

[0009] Through the integrated control system, the complexity of communication between devices is reduced, and the operating efficiency of the photovoltaic energy storage power supply system is improved. Centralized management reduces the need for multiple independent monitoring systems, thereby reducing the operation and maintenance costs. The photovoltaic energy storage power supply system provided in this embodiment can quickly respond to system state changes through real-time monitoring and remote control, improving the reliability of the system. The battery management system and the temperature management device are integrated in the photovoltaic energy storage cabinet, which can prevent safety problems such as overheating and protect the battery from damage. Integrating the energy management system, the photovoltaic energy storage inverter, the battery management system, the temperature management device, and the battery cluster in a single photovoltaic energy storage cabinet reduces the need for discrete components and the corresponding connection lines. The integrated design significantly reduces the space occupied by the system. By integrating key components such as the photovoltaic energy storage inverter, the battery management system, and the temperature management device, the need for decentralized control between individual devices is reduced, thus simplifying communication scheduling.

[0010] In summary, through the integrated design, the problems of the photovoltaic energy storage power supply system in terms of space occupancy and communication scheduling are effectively solved.

[0011] In some possible implementation manners, it further includes a fire protection module and a water immersion module disposed in the cabinet of the photovoltaic energy storage cabinet. The fire protection module, the water immersion module are connected to the energy management system and are used for accessing the fire protection monitoring data and water immersion monitoring in the cabinet.

[0012] By providing the fire protection module and the water immersion module in the cabinet of the photovoltaic energy storage cabinet, real-time monitoring and rapid response to fire and water immersion risks can be achieved, significantly improving safety. Remote monitoring reduces the need for on-site inspections and lowers the operation and maintenance costs. The integrated safety monitoring system ensures the stable operation of the photovoltaic energy storage cabinet in various environments. The design takes into account various environmental factors, improving the adaptability of the photovoltaic energy storage cabinet to different environmental conditions.

[0013] In some possible implementation manners, the energy management system is connected to the photovoltaic energy storage inverter, the water immersion module, the temperature management device, and the battery management system through the Modbus RTU communication mode; the photovoltaic energy storage inverter and the battery management system are connected through the CAN protocol.

[0014] The wide use and standardization characteristics of the Modbus RTU protocol enable the energy management system to be compatible with a variety of devices, facilitating system integration. The CAN protocol ensures stable communication between the photovoltaic energy storage inverter and the battery management system with its high reliability and anti-interference ability. Adopting standardized communication protocols can reduce development and maintenance costs. Through reliable communication protocols, system instability problems caused by communication failures are reduced.

[0015] In some possible implementation manners, the fire protection module includes a perfluoromethylcyclohexanone fire protection unit and a water fire protection unit, and performs a fire protection action when receiving a fire protection control signal sent by the energy management system.

[0016] The perfluoromethylcyclohexanone fire protection unit and the water fire protection unit provide dual guarantees and can cope with different types of fire situations. The automated fire protection control signal transmission and response mechanism ensures that the fire extinguishing program can be quickly started when a fire occurs. Timely fire extinguishing actions can minimize the damage of the fire to equipment and systems and protect asset safety. Since all fire protection equipment can be monitored and managed through the energy management system, the integrated fire protection module simplifies the system maintenance work.

[0017] In some possible implementation manners, the temperature management device is an air conditioner. Since too high or too low temperature will affect the performance and life of the battery, an appropriate temperature range helps to extend the service life of the battery. Maintaining the temperature stability of the battery cluster through the air conditioner can improve the stability and reliability of the entire photovoltaic energy storage power supply system.

[0018] In some possible implementation manners, the battery cluster is composed of multiple battery packs including multiple battery cells. The technical solution of designing the battery cluster to be composed of multiple battery packs containing battery cells helps to improve the overall performance and reliability of the photovoltaic energy storage system.

[0019] In some possible implementation manners, the battery management system includes a main control module and a slave control module. The slave control module is used to monitor the temperature and voltage information of each battery cell as battery cell information, and the main control module is used to collect the battery cell information of the slave control module and the current information of the battery cluster.

[0020] By real-time monitoring the temperature and voltage of the battery cells, potential safety hazards such as overheating and overcharging can be prevented, and the safety of the battery cluster can be improved. The distributed monitoring system can more accurately evaluate the state of the battery cluster and improve the reliability of the photovoltaic energy storage power supply system. The collaborative work of the main control module and the slave control module can more effectively manage the energy flow of the battery cluster and improve the overall efficiency of the photovoltaic energy storage power supply system. The modular design makes the battery management system easy to expand, and more slave control modules can be added according to needs to monitor more battery cells.

[0021] In some possible implementation manners, the battery management system and the battery cluster are connected in a daisy chain manner. Connecting the battery management system and the battery cluster in a daisy chain manner simplifies the wiring requirements, reduces complexity and installation costs. The daisy chain structure is easy to expand, and more slave control modules or battery cells can be added according to needs to adapt to different energy storage requirements.

[0022] In some possible implementations, the power supply system includes a backup power supply, and also includes a mains power supply module and / or a load power supply module. Through the combination of the mains power, the backup power supply, and the load power supply module, the power supply system can provide stable power supply under various circumstances.

[0023] In some possible implementations, input / output ports are further provided on the cabinet of the optical storage cabinet, and the optical storage inverter is connected to the photovoltaic array, the mains power supply module and / or the load power supply module, and the backup power supply through the input / output ports. The integrated input / output ports simplify the system wiring and improve the integration and aesthetics of the photovoltaic energy storage power supply system. Brief Description of the Drawings

[0024] The present application will be further described below in conjunction with the drawings and embodiments.

[0025] Figure 1 It is a schematic structural diagram of a photovoltaic energy storage power supply system proposed by the present application.

[0026] Illustration: 1. Energy storage cloud platform; 2. Energy management system; 3. Optical storage inverter; 4. Battery management system; 5. Battery cluster; 6. Temperature management device; 7. Perfluoromethylcyclohexanone fire protection unit; 8. Water fire protection unit; 9. Water immersion module; 10. Input / output port; 11. Photovoltaic array; 12. Mains power supply module; 13. Backup power supply; 14. Optical storage cabinet. Detailed Embodiments

[0027] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments.

[0028] Refer to Figure 1 , Figure 1 It is a schematic structural diagram of a photovoltaic energy storage power supply system proposed by the present application.

[0029] The embodiments of the present application provide a photovoltaic energy storage power supply system, including an optical storage cabinet 14, an energy management system 2, an energy storage cloud platform 1, an optical storage inverter 3, a battery management system 4, and a temperature management device 6 connected to the energy management system 2. It further includes a battery cluster 5 connected to the energy management system 2 through the battery management system 4, a photovoltaic array 11 and a power supply system connected to the optical storage inverter 3. The energy management system 2, the optical storage inverter 3, the battery management system 4, the temperature management device 6, and the battery cluster 5 are arranged inside the cabinet of the optical storage cabinet 14;

[0030] The energy management system 2 is used as the control center of the photovoltaic energy storage power supply system, accesses the data of the battery management system 4, the photovoltaic energy storage inverter 3, and the temperature management device 6, and enables the operation and maintenance personnel to remotely query the real-time and historical information of the energy management system 2 through the energy storage cloud platform 1, and controls the energy management system 2 to perform charge and discharge operations; the power supply system is used to provide the electric power required by the photovoltaic energy storage power supply system.

[0031] The photovoltaic energy storage power supply system uses the energy management system 2 as the control center to achieve unified management and control of the entire system. The energy management system 2 integrates the data of the battery management system 4, the photovoltaic energy storage inverter 3, and the temperature management device 6, and through the energy storage cloud platform 1, enables the operation and maintenance personnel to remotely query real-time and historical information. Through the energy storage cloud platform 1, the operation and maintenance personnel can remotely control the energy management system 2 to perform charge and discharge operations, improving the operability and flexibility of the photovoltaic energy storage power supply system. At the same time, the photovoltaic array 11 is responsible for collecting solar energy and converting it into electrical energy, and the power supply system provides the electric power required by the photovoltaic energy storage power supply system to ensure the stable operation of the photovoltaic energy storage power supply system. The temperature management device 6 monitors and manages the temperature of the battery cluster 5 to ensure that the battery operates in the best state and extends the battery life. The battery management system 4 is connected to the energy management system 2 and is responsible for monitoring the states of the battery cluster 5, including the voltage, current, and temperature of the battery, and transmitting them to the energy management system 2 to ensure the safe and efficient operation of the battery. In specific applications, the photovoltaic energy storage inverter and the photovoltaic array (photovoltaic power supply) 11, the battery management system 4, and the power supply system are directly connected to control their power supply logic.

[0032] The advantages of this are that through the integrated control system, the complexity of communication between devices is reduced, and the operating efficiency of the photovoltaic energy storage power supply system is improved. Centralized management reduces the need for multiple independent monitoring systems, thereby reducing the operation and maintenance costs. The photovoltaic energy storage power supply system provided in this embodiment can quickly respond to changes in the system state through real-time monitoring and remote control, improving the reliability of the system. The battery management system 4 and the temperature management device 6 are integrated in the photovoltaic energy storage cabinet 14, which can prevent safety problems such as overheating and protect the battery from damage. Integrating the energy management system 2, the photovoltaic energy storage inverter 3, the battery management system 4, the temperature management device 6, and the battery cluster 5 in one photovoltaic energy storage cabinet 14 body reduces the demand for scattered components and the corresponding connection lines, and the integrated design significantly reduces the space occupied by the system. By integrating key components such as the photovoltaic energy storage inverter 3, the battery management system 4, and the temperature management device 6 together, the need for decentralized control between individual devices is reduced, thus simplifying communication scheduling.

[0033] In summary, through the integrated design, the problems of the photovoltaic energy storage power supply system in terms of space occupation and communication scheduling are effectively solved.

[0034] In specific applications, charging and discharging operations can be intelligently performed according to the power generation of the photovoltaic array 11 and the load demand, optimizing the energy utilization efficiency. The remote monitoring and control function simplifies the system maintenance work, reduces the on-site operation and maintenance requirements, and lowers the maintenance cost.

[0035] In one embodiment, it further includes a fire protection module and a water immersion module 9 disposed inside the cabinet of the energy storage cabinet 14. The fire protection module, the water immersion module 9 are connected to the energy management system 2 for accessing the fire monitoring data and water immersion monitoring inside the cabinet.

[0036] A fire protection module and a water immersion module 9 are added inside the energy storage cabinet 14 and are connected to the energy management system 2 for monitoring and handling safety issues inside the cabinet. Specifically, the fire protection module is responsible for monitoring the fire risk inside the energy storage cabinet 14, which includes sensors such as smoke, temperature, or flame sensors for real-time monitoring of potential fire signs. The water immersion module 9 is used to detect whether there is water immersion inside the cabinet, for example, it includes a water level sensor or a humidity sensor to ensure timely response in case of leakage or other water source problems. The data collected by the fire protection module and the water immersion module 9 are transmitted to the energy management system 2 to achieve centralized monitoring of the safety status. At the same time, through the energy storage cloud platform 1, operation and maintenance personnel can remotely access these monitoring data, understand the safety status of the energy storage cabinet 14 in real time, and intervene when necessary. In specific applications, once an abnormal situation is detected, the energy management system 2 can automatically trigger an alarm and start corresponding safety measures according to the preset protocol, such as starting the fire extinguishing system or the drainage system. The integration of the fire protection and water immersion module 9 ensures the safety of the entire energy storage cabinet 14 system, and the combination with the energy management system 2 improves the intelligent level of the photovoltaic energy storage power supply system.

[0037] The advantages of this are that by setting the fire protection module and the water immersion module 9 inside the cabinet of the energy storage cabinet 14, real-time monitoring and rapid response to fire and water immersion risks can be achieved, significantly improving safety. Remote monitoring reduces the need for on-site inspections and lowers the operation and maintenance cost. The integrated safety monitoring system ensures the stable operation of the energy storage cabinet 14 in various environments. The design takes into account various environmental factors, improving the adaptability of the energy storage cabinet 14 to different environmental conditions.

[0038] In one embodiment, the energy management system 2 is connected to the energy storage inverter 3, the water immersion module 9, the temperature management device 6, and the battery management system 4 through the Modbus RTU communication mode; the energy storage inverter 3 and the battery management system 4 are connected through the CAN protocol. The energy storage inverter 3 and the battery management system 4 (BMS) exchange data to coordinate their operations. For example, the BMS can transmit the charging state of the battery to the energy storage inverter 3, and the energy storage inverter 3 adjusts the output power accordingly.

[0039] Among them, the Modbus RT communication mode is a widely used serial communication protocol suitable for device communication in industrial environments. In this solution, the energy management system 2 communicates with the photovoltaic energy storage inverter 3, the water immersion module 9, and the temperature management device 6 through the Modbus RTU protocol to achieve data reading and the issuance of control commands. CAN (Controller Area Network) is a multi-master bus system suitable for high-reliability network communication. The communication between the photovoltaic energy storage inverter 3 and the battery management system 4 adopts the CAN protocol to ensure the stability and real-time performance of data transmission. The energy management system 2, as the central node, collects data from each module (system), processes and analyzes it to monitor the operating status of the entire photovoltaic energy storage power supply system.

[0040] The advantages of this are that the wide use and standardization characteristics of the Modbus RTU protocol enable the energy management system 2 to be compatible with a variety of devices, facilitating system integration. The CAN protocol, with its high reliability and anti-interference ability, ensures the stable communication between the photovoltaic energy storage inverter 3 and the battery management system 4. Adopting standardized communication protocols can reduce development and maintenance costs, and through reliable communication protocols, the system instability problems caused by communication failures are reduced.

[0041] In one embodiment, the fire protection module includes a perfluoromethyl hexanone fire protection unit 7 and a water fire protection unit 8, which perform fire protection actions when the fire protection module receives the fire protection control signal sent by the energy management system 2.

[0042] It can be considered that the fire protection module is composed of a perfluoromethyl hexanone fire protection unit 7 and a water fire protection unit 8 to provide fire extinguishing means for different types of fires respectively. Perfluoromethyl hexanone is a clean fire extinguishing agent because it does not conduct electricity and can extinguish fires without damaging equipment, being suitable for electrical fires. The water fire protection unit 8 is suitable for non-electrical fires and reduces the temperature of the fire source through the cooling effect of water to achieve the purpose of extinguishing the fire. The fire protection module is connected to the energy management system 2 and can receive control signals from the energy management system 2. When the energy management system 2 detects a fire risk or confirms the occurrence of a fire, it sends a fire protection control signal to the fire protection module. In specific applications, after receiving the control signal, the fire protection module automatically activates the corresponding fire protection unit to perform fire extinguishing actions according to the type and severity of the fire. The activation of the fire protection module is closely coordinated with the monitoring and control of the energy management system 2 to ensure a rapid and effective response in case of a fire. See Figure 1 , where the energy management system 2 and the fire protection module can be connected through a digital input port (DI), and the water fire protection unit 8 can be a normally open node (NO) to ensure that there is no water flow during normal operation and it will only be activated in case of an emergency (such as a fire).

[0043] The advantage of this is that the perfluoropentanone fire protection unit 7 and the water fire protection unit 8 provide double protection and can cope with different types of fire situations. The automated fire control signal transmission and response mechanism ensures that the fire extinguishing procedure can be quickly initiated when a fire occurs. Timely fire extinguishing actions can minimize the damage of the fire to equipment and systems and protect asset safety. Since all fire protection equipment can be monitored and managed through the energy management system 2, the integrated fire protection module simplifies the system maintenance work.

[0044] In one embodiment, the temperature management device 6 is an air conditioner. In a specific application, as the temperature management device 6, the air conditioner can monitor the temperature of the battery cluster 5 in real time through the temperature sensors arranged on the battery cluster 5. The temperature data collected by the temperature sensors will be transmitted to the energy management system 2 for its analysis and processing. The energy management system 2 intelligently judges whether it is necessary to start the air conditioner to adjust the temperature according to the collected temperature data. When the temperature of the battery cluster 5 exceeds the preset safe range, the energy management system 2 will send a control signal to the air conditioner to start or adjust its working state to achieve the ideal temperature control. After the air conditioner is started, it continuously monitors the temperature change and adjusts the working mode of the air conditioner as needed to keep the battery cluster 5 at the optimal working temperature. The intelligent control of the air conditioner can optimize energy consumption, start only when necessary, and reduce unnecessary energy waste.

[0045] The advantage of this is that since too high or too low temperature will affect the performance and lifespan of the battery, a suitable temperature range helps to extend the lifespan of the battery. Maintaining the temperature stability of the battery cluster 5 through the air conditioner can improve the stability and reliability of the entire photovoltaic energy storage power supply system.

[0046] In one embodiment, the battery cluster 5 is composed of multiple battery packs including multiple battery cells.

[0047] The battery cluster 5 adopts a modular design and is composed of multiple battery packs, and each battery pack contains multiple battery cells. This design is convenient for expansion and maintenance. Inside each battery pack, the battery cells can be connected in parallel or in series to meet the required voltage and capacity requirements. The battery management system 4 can monitor the states of each battery pack and battery cell, including voltage, current, temperature, etc., to ensure the safe and efficient operation of the battery cluster 5; it can also perform balancing control to ensure the consistency among the battery cells in the battery pack and avoid performance degradation or safety problems caused by unbalanced battery cells. The advantage of this is that the technical solution of designing the battery cluster 5 as being composed of multiple battery packs containing battery cells helps to improve the overall performance and reliability of the photovoltaic energy storage system.

[0048] In one embodiment, the battery management system 4 includes a main control module and slave control modules. The slave control modules are used to monitor the temperature and voltage information of each of the battery cells as battery cell information, and the main control module is used to collect the battery cell information of the slave control modules and the current information of the battery cluster 5.

[0049] The advantages of this are that by monitoring the temperature and voltage of the battery cells in real time, potential safety hazards such as overheating and overcharging can be prevented, enhancing the safety of the battery cluster 5. The distributed monitoring system can more accurately evaluate the state of the battery cluster 5, improving the reliability of the photovoltaic energy storage power supply system. The collaborative operation of the main control module and the slave control modules can more effectively manage the energy flow of the battery cluster 5, enhancing the overall efficiency of the photovoltaic energy storage power supply system. The modular design makes the battery management system 4 easy to expand, and more slave control modules can be added as needed to monitor more battery cells.

[0050] In one embodiment, the battery management system 4 and the battery cluster 5 are connected in a daisy chain manner.

[0051] A daisy chain is a linear network topology where one device (node) is connected to the next, forming a continuous chain. The advantages of this are that it simplifies the wiring requirements, reducing complexity and installation costs. The daisy chain structure is easy to expand, and more slave control modules or battery cells can be added as needed to meet different energy storage requirements.

[0052] In one embodiment, the power supply system includes a backup power supply 13, and also includes a mains power supply module 12 and / or a load power supply module.

[0053] In specific applications, when normal power supply is available, the mains power supply module 12 or the load power supply module converts the power supply into a voltage and frequency suitable for use in the photovoltaic energy storage power supply system, providing a stable power source for the photovoltaic energy storage power supply system. The mains power supply module 12 in the schematic diagram can also be a load power supply module.

[0054] When normal power supply is unavailable or a fault occurs, the backup power supply 13 (such as a battery or a diesel generator) will serve as an emergency power supply to ensure continuous power supply to the photovoltaic energy storage power supply system. The power supply system can include an intelligent switching device to automatically switch between different power sources, ensuring the continuity and stability of power supply.

[0055] The advantages of this are that through the combination of the mains power supply, the backup power supply 13, and the load power supply module, the power supply system can provide stable power supply under various circumstances.

[0056] In one embodiment, an input / output port 10 is further provided on the cabinet of the energy storage cabinet 14, and the energy storage inverter 3 is connected to the photovoltaic array 11, the mains power supply module 12 and / or the load power supply module, and the backup power supply 13 through the input / output port 10.

[0057] The input / output port 10 is integrated on the cabinet of the energy storage cabinet 14, providing an interface for connecting different power modules. The energy storage inverter 3 is connected to external power equipment (photovoltaic array 11, mains power supply module 12, load power supply module, backup power supply 13) through the port to achieve the input and output of electric energy. In specific applications, the input / output port 10 includes necessary electrical isolation components to ensure the safe operation between various parts of the system.

[0058] The advantage of this is that the integrated input / output port 10 simplifies the system wiring and improves the integration and aesthetics of the photovoltaic energy storage power supply system.

[0059] As an example, a photovoltaic energy storage power supply system is provided, including an energy storage cabinet, an energy management system, an energy storage inverter, a battery management system, a battery cluster, an air conditioner, and a fire protection module. An input / output port is provided on the energy storage cabinet.

[0060] The cabinet of the energy storage cabinet is an outer shell integrating the photovoltaic energy storage power supply system. The energy management system accesses the data of the battery management system, the energy storage inverter, the air conditioner, the fire protection module, and water immersion. It collects data from each device and outputs it to the energy storage cloud platform, facilitating maintenance personnel to query real-time and historical information through the web page or mobile terminal and control the energy storage cabinet for charging and discharging.

[0061] The energy storage inverter integrates the functions of a photovoltaic inverter and an energy storage converter; the battery management system consists of a main control module and a slave control module. The main control is used to collect the current information of the slave control and the battery cluster; the slave control is used to monitor the temperature and voltage information of the battery cells. The slave control module and the main control module can respectively include a microcontroller or a processor, a storage unit, etc. The battery cluster is composed of battery packs, and the battery packs are composed of battery cells. The air conditioner is used for thermal management of the battery cluster. The fire protection module consists of a perfluoromethylcyclohexanone fire protection module for the battery packs and the battery cluster and a water fire protection for the battery cluster. The input / output port of the energy storage cabinet consists of a photovoltaic input port, a mains input port, and a mains output port, and is used to connect to external power supplies (power systems). The photovoltaic energy storage power supply system supported in the energy storage cabinet has the following operating modes: general mode, overload compensation mode, UPS mode, economic mode, and off-grid mode.

[0062] General mode: When the photovoltaic array has sufficient energy, the photovoltaic energy will supply power to the load, battery, and grid in the order of load first, battery second, and grid last. (When the local grid does not allow the inverter power supply to be connected to the grid, the power connected to the grid can be set to 0W). When the photovoltaic energy is insufficient, the battery discharges to supply power to the load. When the battery power supply is insufficient, the grid joins in to supply power.

[0063] Overload compensation mode: Set the maximum power Pmax (kVA) signed with the grid. When the load consumption is less than Pmax, the photovoltaic first charges the battery, and the grid supplies the load. When the battery is full, the photovoltaic will supply the load together with the grid without using the battery. When the load consumption exceeds Pmax, power is obtained from the battery to supply the load to compensate for the power exceeding Pmax.

[0064] UPS mode: In this working mode, the inverter uses the power of the photovoltaic or the grid to charge the battery until it is full. As long as the grid exists, the battery will not discharge. When the grid fails, the power from the photovoltaic and the battery will supply power to the load (UPS) connected to the standby side.

[0065] Economic mode: In this working mode, the charge and discharge power limits and time can be set. The inverter will use the power from the photovoltaic or the grid to charge the battery within a predetermined time. The inverter will supply the load with the power of the photovoltaic and the battery within a predetermined time period, and the insufficient part will be supplied by the grid.

[0066] Off-grid mode: In the pure off-grid mode, the photovoltaic gives priority to supplying the standby load, and the excess power charges the battery. When the photovoltaic power generation is insufficient, the battery will discharge and supply power to the standby load together with the photovoltaic.

[0067] The technical solutions provided in the above examples integrate the functions of a photovoltaic inverter and an energy storage converter through a photovoltaic energy storage inverter, solve the problems of charging, discharging, power supply, and power conversion in the system, and ensure the safe, reliable, and efficient operation of the entire system. Through the energy management system, the data of the battery management system, photovoltaic energy storage inverter, air conditioner, and water immersion are connected. It collects data from each device and outputs it to the energy storage cloud platform, facilitating the maintenance personnel to query real-time and historical information through the web page or mobile phone, and controlling the photovoltaic energy storage cabinet to charge and discharge. The input and output ports are increased to facilitate on-site wiring. The above five working modes are supported to make the power conversion more efficient.

[0068] Thus, by integrating the originally multiple devices into one device in the photovoltaic energy storage cabinet, both the cost is reduced and the efficiency is improved. Integrating the communication information of the single devices into the energy management system facilitates information management, reduces the operation and maintenance cost, and improves the efficiency. The input and output ports are increased to facilitate on-site wiring and improve the installation efficiency.

[0069] In the embodiments of the present application, "at least one" means one or more, and "a plurality" means two or more. "And / or" describes the association relationship of associated objects and indicates that there can be three relationships. For example, A and / or B can represent the situations of: A existing alone, A and B existing simultaneously, and B existing alone, where A and B can be singular or plural. The character " / " generally indicates that the associated objects before and after are in an "or" relationship. "At least one (item)" or its similar expression refers to any combination of these items, including any combination of single item (item) or plural items (items). For example, at least one (item) of a, b, or c can represent: a, b, c, a and b, a and c, b and c, a and b and c, where a, b, and c can be single or multiple. It should be noted that "at least one (item)" can also be interpreted as "one (item) or more items (items)".

[0070] As mentioned above, the above is only a preferred specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present application, according to the technical solution and its application concept of the present application, makes equivalent replacements or changes, and should be covered by the protection scope of the present application.

Claims

1. A photovoltaic energy storage power supply system, characterized in that: It includes a solar storage cabinet, an energy management system, an energy storage cloud platform connected to the energy management system, a solar storage inverter, a battery management system, and a temperature management device, and also includes a battery cluster connected to the energy management system through the battery management system, a photovoltaic array connected to the solar storage inverter, and a power supply system. The energy management system, the solar storage inverter, the battery management system, the temperature management device, and the battery cluster are arranged in the cabinet of the solar storage cabinet; The energy management system is used as the control center of the photovoltaic energy storage power supply system, accessing the data of the battery management system, the photovoltaic storage inverter, and the temperature management device, and enabling operation and maintenance personnel to remotely query the real-time and historical information of the energy management system through the energy storage cloud platform, and control the energy management system to perform charging and discharging operations; the power supply system is used to provide the power required by the photovoltaic energy storage power supply system.

2. The photovoltaic energy storage power supply system according to claim 1, characterized in that: It also includes a fire protection module and a water immersion module arranged in the cabinet of the optical storage cabinet. The fire protection module, the water immersion module and the energy management system are connected to be used for accessing the fire protection monitoring data and water immersion monitoring in the cabinet.

3. The photovoltaic energy storage power supply system according to claim 2, characterized in that: The energy management system is connected to the photovoltaic storage inverter, the water immersion module, the temperature management device, and the battery management system via the Modbus RTU communication mode; the photovoltaic storage inverter and the battery management system are connected via the CAN protocol.

4. The photovoltaic energy storage power supply system according to claim 2, characterized in that: The fire fighting module comprises a perfluorohexanone fire fighting unit and a water fire fighting unit, and executes a fire fighting action when the fire fighting module receives a fire fighting control signal sent by the energy management system.

5. The photovoltaic energy storage power supply system according to claim 1, characterized in that: The temperature management device is an air conditioner.

6. The photovoltaic energy storage power supply system according to claim 1, characterized in that: The battery cluster is composed of a plurality of battery packs including a plurality of battery cells.

7. The photovoltaic energy storage power supply system according to claim 6, characterized in that: The battery management system includes a master control module and a slave control module. The slave control module is used to monitor the temperature and voltage information of each battery cell as battery cell information, and the master control module is used to collect the battery cell information of the slave control module and the current information of the battery cluster.

8. The photovoltaic energy storage power supply system according to claim 6, characterized in that: The battery management system and the battery cluster are connected in a daisy chain manner.

9. The photovoltaic energy storage power supply system according to claim 1, characterized in that: The power supply system includes a backup power supply, and also includes a mains power supply module and / or a load power supply module.

10. The photovoltaic energy storage power supply system according to claim 9, characterized in that: The cabinet body of the photovoltaic storage cabinet is also provided with input and output ports, and the photovoltaic storage inverter is connected to the photovoltaic array, the mains power supply module and / or the load power supply module, and the backup power supply through the input and output ports.

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