Battery discharge management method and system, and storage medium and integrated inverter-controller

Abstract

The present invention relates to the technical field of power supply, and specifically relates to a battery discharge management method and system, and a computer-readable storage medium and an integrated inverter-controller. In the present invention, battery information of an energy storage battery, a photovoltaic discharge power of a photovoltaic power generation module, and a load power required by a load are acquired in real time, and a preset discharge current is set on the basis of the specification of the energy storage battery, such that a battery discharge power of the energy storage battery is set on the basis of the preset discharge current and the battery information, thereby ensuring that a current allowed by the specification of the energy storage battery is not exceeded during the discharge of the energy storage battery; and a maximum discharge power during the discharge of the energy storage battery is set, thereby achieving overcurrent protection of the energy storage battery. In addition, by means of the battery discharge power, the photovoltaic discharge power and the load power, discharge strategies of the energy storage battery, the photovoltaic power generation module and a mains supply can be acquired and executed. Therefore, on the premise of overcurrent protection, the energy storage battery can achieve the maximum discharge power during discharge, thereby ensuring that energy of the energy storage battery can be fully utilized.

Description

Battery discharge management methods, systems, storage media, and integrated inverters Technical Field

[0001] This invention relates to the field of power supply technology, and in particular to a battery discharge management method, system, computer-readable storage medium, and integrated inverter. Background Technology

[0002] The integrated inverter combines a photovoltaic power generation module, an energy storage battery, an inverter, and a controller. It can supply power to the load through both inverter and mains power, with the inverter power supply energy coming from the photovoltaic power generation module and the energy storage battery.

[0003] When photovoltaic (PV) power modules and energy storage batteries supply power to a load via inverter, the energy from the PV modules is unstable, leaving the energy storage batteries to bear the entire load's energy on their own. When the battery's charge is low, the load power can easily exceed its capacity. In existing technologies, the inverter immediately switches to mains power to protect the battery; however, this switch can lead to underutilization of the battery's energy. Technical issues

[0004] The technical problem to be solved by the embodiments of the present invention is to provide a battery discharge management method, system, computer-readable storage medium and inverter integrated with reverse control, so as to solve the problem that the energy of energy storage batteries cannot be fully utilized in the prior art. Technical solutions

[0005] The battery discharge management method provided in this invention is applied to an integrated inverter, which includes an energy storage battery and a photovoltaic power generation module, and is externally connected to mains power. The energy storage battery, the photovoltaic power generation module, and the mains power within the integrated inverter can all supply power to the load. The battery discharge management method includes: acquiring in real-time battery information of the energy storage battery, the photovoltaic discharge power of the photovoltaic power generation module, and the load power required by the load; setting a preset discharge current according to the specifications of the energy storage battery; setting the battery discharge power of the energy storage battery according to the preset discharge current and the battery information; and acquiring and executing the discharge strategies of the energy storage battery, the photovoltaic power generation module, and the mains power based on the battery discharge power, the photovoltaic discharge power, and the load power.

[0006] Optionally, the step of setting a preset discharge current according to the specifications of the energy storage battery, and setting the battery discharge power of the energy storage battery according to the preset discharge current and the battery information further includes: obtaining the battery charge and battery discharge voltage from the battery information; obtaining the maximum discharge current of the energy storage battery according to the battery charge and the preset discharge current; and obtaining the battery discharge power according to the battery discharge voltage and the maximum discharge current.

[0007] Optionally, the step of obtaining the maximum discharge current of the energy storage battery based on the battery charge and the preset discharge current includes: when the battery charge accounts for more than or equal to 50% of the total battery capacity, the preset discharge current is used as the maximum discharge current; when the battery charge accounts for less than 50% of the total battery capacity, the maximum discharge current is obtained based on the preset discharge current and the battery charge.

[0008] Optionally, the step of obtaining the maximum discharge current based on the preset discharge current and the battery charge when the battery charge is less than 50% of the total battery capacity includes:

[0009] The maximum discharge current is obtained using the following formula:

[0010]

[0011] Wherein, the maximum discharge current is The battery capacity is The preset discharge current is .

[0012] Optionally, the step of obtaining and executing the discharge strategy of the energy storage battery, the photovoltaic power generation module, and the mains power based on the battery discharge power, the photovoltaic discharge power, and the load power includes:

[0013] If the photovoltaic discharge power is greater than or equal to the load power, the photovoltaic power generation module is controlled to supply power to the load; if the photovoltaic discharge power is less than the load power, and the sum of the battery discharge power and the photovoltaic discharge power is greater than or equal to the load power, the photovoltaic power generation module and the energy storage battery are controlled to supply power to the load; if the sum of the battery discharge power and the photovoltaic discharge power is less than the load power, the photovoltaic power generation module, the energy storage battery, and the mains power are controlled to supply power to the load.

[0014] Optionally, the step of obtaining and executing the discharge strategy of the energy storage battery, the photovoltaic power generation module, and the mains power based on the battery discharge power, the photovoltaic discharge power, and the load power further includes: obtaining the battery discharge current in the battery information; when the battery discharge current is greater than or equal to the maximum discharge current, reducing the inverter hybrid load power of the integrated inverter to ensure that the battery discharge current does not exceed the maximum discharge current; when the battery discharge current is less than the maximum discharge current, increasing the inverter hybrid load power of the integrated inverter until the battery discharge current is equal to the maximum discharge current.

[0015] Optionally, the step of obtaining and executing the discharge strategy of the energy storage battery, the photovoltaic power generation module and the mains power based on the battery discharge power, the photovoltaic discharge power and the load power includes: preset the cutoff discharge capacity of the energy storage battery; when the battery capacity is lower than the cutoff discharge capacity, the energy storage battery stops discharging.

[0016] Another technical solution adopted by the present invention to solve its technical problem is: providing a battery discharge management system for implementing the steps of the above method, including: a photovoltaic power generation module for photovoltaic power generation; an energy storage battery module for supplying power to a load; an acquisition module for acquiring in real time the battery information of the energy storage battery, the photovoltaic discharge power of the photovoltaic power generation module, and the load power required by the load; a preset module for presetting the preset discharge current of the energy storage battery and setting the battery discharge power of the energy storage battery according to the preset discharge current and the battery information; and a control module for acquiring and executing the discharge strategy of the energy storage battery, the photovoltaic power generation module, and the mains power according to the battery discharge power, the photovoltaic discharge power, and the load power.

[0017] Another technical solution adopted by the present invention to solve its technical problem is: providing a computer-readable storage medium storing a computer program, wherein when the computer program is executed by a processor, the processor performs the steps of the above-described method.

[0018] Another technical solution adopted by the present invention to solve its technical problem is: to provide an integrated inverter and control inverter, including a memory and a processor, wherein the memory stores a computer program, and when the computer program is executed by the processor, the processor performs the steps of the above method. Beneficial effects

[0019] Compared with existing technologies, the beneficial effects of the battery discharge management method provided in this invention are as follows: By acquiring the battery information of the energy storage battery, the photovoltaic discharge power of the photovoltaic power generation module, and the load power required by the load in real time, and setting a preset discharge current according to the specifications of the energy storage battery, the battery discharge power of the energy storage battery is set according to the preset discharge current and the battery information. This ensures that the current allowed by the specifications of the energy storage battery will not be exceeded during discharge, and the maximum discharge power of the energy storage battery during discharge is set, thereby achieving overcurrent protection for the energy storage battery. Furthermore, by acquiring and executing the discharge strategies of the energy storage battery, the photovoltaic power generation module, and the mains power based on the battery discharge power, the photovoltaic discharge power, and the load power, the energy storage battery can achieve maximum discharge power during discharge under the premise of overcurrent protection, thus ensuring that the energy of the energy storage battery can be fully utilized. Attached Figure Description

[0020] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings and examples. In the accompanying drawings:

[0021] Figure 1 is a flowchart illustrating an embodiment of the battery discharge management method provided by the present invention.

[0022] Figure 2 is a schematic diagram of an embodiment of the battery discharge management system provided by the present invention;

[0023] Figure 3 is a structural schematic diagram of an embodiment of the inverter with integrated control and inversion provided by the present invention;

[0024] Figure 4 is a schematic diagram of an embodiment of the computer-readable storage medium provided by the present invention.

[0025] The labels for the attached figures are as follows:

[0026] 20. Battery discharge management system; 21. Photovoltaic power generation module; 22. Energy storage battery module; 23. Acquisition module; 24. Preset module; 25. Control module;

[0027] 30. Computer-readable storage medium; 31. Computer program;

[0028] 40. Integrated inverter; 41. Processor; 42. Memory. The best embodiment of the present invention

[0029] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0030] This invention provides a battery discharge management method. Please refer to Figure 1, which is a flowchart illustrating an embodiment of the battery discharge management method provided by this invention. The battery discharge management method provided by this invention is applied to an integrated inverter, which includes an energy storage battery and a photovoltaic power generation module. The integrated inverter is externally connected to mains power, and the energy storage battery, photovoltaic power generation module, and mains power within the integrated inverter can all supply power to the load. The battery discharge management method provided by this invention includes the following steps:

[0031] S101: Real-time acquisition of battery information of energy storage battery, photovoltaic discharge power of photovoltaic power generation module and load power required by load.

[0032] In a specific implementation scenario, when managing the discharge of the energy storage battery within an integrated inverter, it is necessary to obtain real-time battery information, the photovoltaic discharge power of the photovoltaic (PV) module, and the load power required by the load. Specifically, the battery information includes battery charge, discharge voltage, and discharge current. The integrated inverter incorporates a Battery Management System (BMS) module, which monitors and acquires the battery charge, discharge voltage, and discharge current in real-time through various sensors within the module. Multiple controllers integrated into the integrated inverter utilize MPPT (Maximum Power Point Tracking) technology to monitor the PV module's voltage and current in real-time. Based on the PV module's voltage and current, the controller tracks the PV module's maximum power output and uses this maximum power output as the PV discharge power, thus acquiring the PV module's PV discharge power in real-time. Different loads require different load power; the integrated inverter can obtain the required load power by monitoring the voltage and current at the load end.

[0033] S102: Set the preset discharge current according to the specifications of the energy storage battery, and set the battery discharge power of the energy storage battery according to the preset discharge current and battery information.

[0034] In a specific implementation scenario, a preset discharge current is set according to the specifications of the energy storage battery. Specifically, the preset discharge current can be set to the maximum current allowed by the specifications of the energy storage battery. The preset discharge current can limit the battery discharge current of the energy storage battery so that the battery discharge current does not exceed the current allowed by the specifications of the energy storage battery, thereby providing overcurrent protection for the energy storage battery and effectively protecting the energy storage battery during the discharge process.

[0035] Furthermore, the battery discharge power of the energy storage battery can be set based on the preset discharge current and battery information. Specifically, the battery charge and battery discharge voltage are obtained from the battery information, and the maximum discharge current of the energy storage battery is obtained based on the battery charge and preset discharge current. The battery discharge power is then obtained based on the battery discharge voltage and maximum discharge current, thereby allowing the maximum discharge power of the energy storage battery during the discharge process to be set.

[0036] In a specific implementation scenario, when the energy storage battery discharges, the maximum discharge current is determined based on the battery's charge level and a preset discharge current. Specifically, when the battery charge level accounts for 50% or more of the total battery capacity, the preset discharge current is used as the maximum discharge current. By using the preset discharge current as the maximum discharge current, the energy storage battery can discharge at the current allowed by its specifications when its charge level is high, thereby achieving maximum discharge power. Thus, when the battery charge level is high, the energy of the energy storage battery can be fully utilized while keeping the discharge current within the safe range allowed by the battery specifications, effectively improving the discharge efficiency and performance of the energy storage battery.

[0037] When the battery charge is less than 50% of the total battery capacity, the maximum discharge current is obtained based on the preset discharge current and the battery charge. In a specific implementation scenario, when the battery charge is less than 50% of the total battery capacity, the energy storage battery enters a derating discharge state. In this state, the maximum discharge current is reduced in real-time based on the battery's real-time charge level. The maximum discharge current of the energy storage battery in the derating discharge state can be obtained using the following formula:

[0038] Among them, the maximum discharge current is The battery capacity is The preset discharge current is .

[0039] Specifically, when the battery charge accounts for less than 50% of the total battery capacity, the above formula can be used to proportionally reduce the maximum discharge current of the battery based on the real-time decay of the battery charge, achieving dynamic adjustment of the maximum discharge current and thus dynamically adjusting the maximum discharge power of the energy storage battery. This ensures that even when the battery charge is low, it can still achieve maximum discharge power according to the charge level, thereby maximizing the utilization of the battery's energy without exceeding its maximum discharge current and maximum discharge power. This effectively avoids the situation in existing technologies where the battery directly switches to mains power once the load power exceeds its capacity.

[0040] S103: Obtain and execute the discharge strategies of the energy storage battery, photovoltaic power generation module and mains power based on the battery discharge power, photovoltaic discharge power and load power.

[0041] In a specific implementation scenario, if the photovoltaic discharge power is greater than or equal to the load power, the photovoltaic power generation module is controlled to supply power to the load. Specifically, when the photovoltaic discharge power is greater than or equal to the load power, it indicates that the photovoltaic power generation module has sufficient energy, with surplus energy beyond meeting the load's power requirements. While the photovoltaic power generation module supplies power to the load independently, the portion of its power exceeding the load can be used to charge the energy storage battery. Therefore, the energy of the photovoltaic power generation module can be fully utilized so that, in situations such as insufficient photovoltaic power generation or at night, the energy storage battery can release energy to supply power to the load.

[0042] If the photovoltaic discharge power is less than the load power, and the sum of the battery discharge power and the photovoltaic discharge power is greater than or equal to the load power, the photovoltaic power generation module and the energy storage battery are controlled to supply power to the load. Specifically, when the photovoltaic discharge power is less than the load power, and the sum of the battery discharge power and the photovoltaic discharge power is greater than or equal to the load power, it indicates that the energy of the photovoltaic power generation module is insufficient to supply power to the load. The photovoltaic power generation module and the energy storage battery need to supply power simultaneously in combination to meet the load power requirements.

[0043] If the sum of the battery discharge power and the photovoltaic discharge power is less than the load power, the system controls the photovoltaic power generation module, energy storage battery, and mains power to supply power to the load. Specifically, when the sum of the battery discharge power and the photovoltaic discharge power is less than the load power, it indicates that the energy of the photovoltaic power generation module and the energy storage battery is insufficient to supply power to the load. At this time, the integrated inverter will obtain the difference between the load power and the sum of the battery discharge power and the photovoltaic discharge power, and control the externally connected mains power to supply power to the load at the difference in power.

[0044] By acquiring and executing discharge strategies for the energy storage battery, photovoltaic power generation module, and mains power based on battery discharge power, photovoltaic discharge power, and load power, the energy supplied by the energy storage battery, photovoltaic power generation module, and mains power can be dynamically adjusted to maximize the utilization of the energy storage battery's energy and ensure that the integrated inverter can provide a stable power supply to the load under various conditions.

[0045] Furthermore, during the execution of the discharge strategies for the energy storage battery, photovoltaic power generation module, and mains power, the integrated inverter can acquire the battery discharge current from the battery information and adjust the inverter's hybrid load power based on the battery discharge current and the maximum discharge current. Specifically, when the battery discharge current is greater than or equal to the maximum discharge current, the inverter's hybrid load power is reduced to ensure that the battery discharge current does not exceed the maximum discharge current; when the battery discharge current is less than the maximum discharge current, the inverter's hybrid load power is increased until the battery discharge current equals the maximum discharge current.

[0046] By implementing this embodiment, during the discharge process of the energy storage battery, the inverter hybrid load power of the integrated inverter can be adjusted according to the battery discharge current and the maximum discharge current, and the battery discharge current of the energy storage battery can be adjusted to approach the maximum discharge current. This makes the actual battery discharge power of the energy storage battery approach the maximum discharge power, thereby improving the power supply efficiency of the energy storage battery and making full use of the energy of the energy storage battery. It should be noted that the battery discharge current equals the maximum discharge current, which means the battery discharge current approaches the maximum discharge current.

[0047] Specifically, increasing or decreasing the inverter hybrid load power can be achieved by controlling the switching state of the IGBT (Insulated Gate Bipolar Transistor) in the inverter to regulate the inverter output current of the integrated inverter and control inverter, thereby adjusting the battery discharge current of the energy storage battery so that the battery discharge current approaches the maximum discharge current.

[0048] In one specific embodiment, the discharge strategy further includes setting a preset discharge cutoff level for the energy storage battery. When the battery charge falls below the cutoff level, the energy storage battery stops discharging. For example, in this embodiment, the cutoff level can be preset to 5% of the total battery capacity. By setting the cutoff level, the energy storage battery can be effectively protected, maximizing its energy utilization while preventing damage from over-discharge. This helps improve the stability and reliability of the battery discharge and extends its lifespan.

[0049] As described above, the battery discharge management method provided in this embodiment of the invention acquires real-time battery information, photovoltaic discharge power of the photovoltaic power generation module, and the load power required by the load. It then sets a preset discharge current based on the specifications of the energy storage battery. This, in turn, sets the battery discharge power of the energy storage battery based on the preset discharge current and battery information, ensuring that the current allowed by the energy storage battery specifications does not exceed the battery's discharge limit. Furthermore, it sets the maximum discharge power of the energy storage battery during discharge, thus achieving overcurrent protection. Additionally, by acquiring and executing discharge strategies for the energy storage battery, photovoltaic power generation module, and mains power based on the battery discharge power, photovoltaic discharge power, and load power, the energy storage battery can achieve maximum discharge power during discharge under the premise of overcurrent protection, thereby ensuring that the energy of the energy storage battery is fully utilized.

[0050] Please refer to Figure 2, which is a structural schematic diagram of an embodiment of the battery discharge management system provided by the present invention. The battery discharge management system 20 provided by the present invention includes a photovoltaic power generation module 21, an energy storage battery module 22, an acquisition module 23, a preset module 24, and a control module 25.

[0051] The photovoltaic power generation module 21 is used for photovoltaic power generation; the energy storage battery module 22 is used for powering the load; the acquisition module 23 is used to acquire the battery information of the energy storage battery, the photovoltaic discharge power of the photovoltaic power generation module 21, and the load power required by the load in real time; the preset module 24 is used to preset the preset discharge current of the energy storage battery and set the battery discharge power of the energy storage battery according to the preset discharge current and battery information; the control module 25 is used to acquire and execute the discharge strategy of the energy storage battery, the photovoltaic power generation module 21, and the mains power according to the battery discharge power, the photovoltaic discharge power, and the load power.

[0052] The acquisition module 23 is also used to acquire the battery power and battery discharge voltage from the battery information; acquire the maximum discharge current of the energy storage battery based on the battery power and the preset discharge current; and acquire the battery discharge power based on the battery discharge voltage and the maximum discharge current.

[0053] The acquisition module 23 is also used to use the preset discharge current as the maximum discharge current when the battery power accounts for more than or equal to 50% of the total battery capacity; and to acquire the maximum discharge current based on the preset discharge current and the battery power when the battery power accounts for less than 50% of the total battery capacity.

[0054] The acquisition module 23 is also used to obtain the maximum discharge current according to the following formula:

[0055] Among them, the maximum discharge current is The battery capacity is The preset discharge current is .

[0056] The control module 25 is also used to control the photovoltaic power generation module to supply power to the load if the photovoltaic discharge power is greater than or equal to the load power; to control the photovoltaic power generation module and the energy storage battery to supply power to the load if the photovoltaic discharge power is less than the load power and the sum of the battery discharge power and the photovoltaic discharge power is greater than or equal to the load power; and to control the photovoltaic power generation module, the energy storage battery and the mains power to supply power to the load if the sum of the battery discharge power and the photovoltaic discharge power is less than the load power.

[0057] The acquisition module 23 is also used to acquire the battery discharge current in the battery information.

[0058] The control module 25 is also used to reduce the inverter hybrid load power of the integrated inverter when the battery discharge current is greater than or equal to the maximum discharge current, so that the battery discharge current does not exceed the maximum discharge current; and to increase the inverter hybrid load power of the integrated inverter when the battery discharge current is less than the maximum discharge current, until the battery discharge current is equal to the maximum discharge current.

[0059] The preset module 24 is also used to preset the cutoff discharge capacity of the energy storage battery.

[0060] The control module 25 is also used to stop the energy storage battery from discharging when the battery charge is lower than the cutoff discharge charge.

[0061] Please refer to Figure 3, which is a schematic diagram of the structure of an embodiment of the computer-readable storage medium 30 provided by the present invention. The computer-readable storage medium 30 stores at least one computer program 31, which is executed by a processor to implement the method shown in Figure 1. Detailed methods can be found above and will not be repeated here. In one embodiment, the computer-readable storage medium 30 may be a storage chip in the final layer, a hard disk, or other readable and writable storage tools such as a portable hard disk, USB flash drive, or optical disk, or it may be a server, etc.

[0062] In one embodiment, the computer-readable storage medium 30 may be a storage chip in a terminal, a hard disk, or other readable and writable storage tools such as a portable hard disk, USB flash drive, or optical disc, or it may be a server, etc.

[0063] Please refer to Figure 4, which is a schematic diagram of an embodiment of the inverter 40 with integrated inverter control provided by the present invention. The inverter 40 with integrated inverter control includes a processor 41 and a memory 42. The processor 41 is coupled to the memory 42. The memory 42 stores a computer program 31, which the processor 41 executes during operation to implement the method shown in Figure 1.

[0064] The technical details of the specific method implemented by the aforementioned integrated inverter 40 when executing computer program 31 have been discussed in detail in the aforementioned method steps, and therefore will not be repeated here.

[0065] Those skilled in the art will understand that all or part of the processes in the methods of the above embodiments can be implemented by a computer program 31 instructing related hardware. The computer program 31 can be stored in a non-volatile computer-readable storage medium 30. When the program is executed, it can include the processes of the embodiments of the methods described above.

[0066] Any references to memory, storage, database, or other media used in the embodiments provided in this application may include non-volatile and / or volatile memory. Non-volatile memory may include read-only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM), or flash memory. Volatile memory may include random access memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in various forms, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), dual data rate SDRAM (DDRSDRAM), enhanced SDRAM (ESDRAM), synchronous link DRAM (SLDRAM), RAMbus direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and RAMbus dynamic RAM (RDRAM), etc.

[0067] It should be noted that the limitations on each step involved in this solution are not considered as limiting the order of steps, provided that they do not affect the implementation of the specific solution. The steps listed first can be executed first, later, or even simultaneously. As long as this solution can be implemented, it should be considered to fall within the protection scope of this invention.

[0068] It should be understood that the above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit them. Those skilled in the art can modify the technical solutions described in the above embodiments, or make equivalent substitutions for some of the technical features; and all such modifications and substitutions should fall within the protection scope of the appended claims of the present invention.

Claims

1. A battery discharge management method, characterized by, This method is applied to an integrated inverter, which includes an energy storage battery and a photovoltaic power generation module, and is externally connected to mains power. The energy storage battery, the photovoltaic power generation module, and the mains power all within the integrated inverter can supply power to the load. The battery discharge management method includes: The battery information of the energy storage battery, the photovoltaic discharge power of the photovoltaic power generation module, and the load power required by the load are obtained in real time. A preset discharge current is set according to the specifications of the energy storage battery, and the battery discharge power of the energy storage battery is set according to the preset discharge current and the battery information. The discharge strategies of the energy storage battery, the photovoltaic power generation module, and the mains power are obtained and executed based on the battery discharge power, the photovoltaic discharge power, and the load power.

2. The battery discharge management method of claim 1, wherein, The step of setting a preset discharge current according to the specifications of the energy storage battery, and setting the battery discharge power of the energy storage battery according to the preset discharge current and the battery information, further includes: Obtain the battery level and battery discharge voltage from the battery information; The maximum discharge current of the energy storage battery is obtained based on the battery charge and the preset discharge current. The battery discharge power is obtained based on the battery discharge voltage and the maximum discharge current.

3. The battery discharge management method of claim 2, wherein, The step of obtaining the maximum discharge current of the energy storage battery based on the battery capacity and the preset discharge current includes: When the battery charge accounts for 50% or more of the total battery capacity, the preset discharge current is used as the maximum discharge current. When the battery charge accounts for less than 50% of the total battery capacity, the maximum discharge current is obtained based on the preset discharge current and the battery charge.

4. The battery discharge management method of claim 3, wherein, The step of obtaining the maximum discharge current based on the preset discharge current and the battery charge when the battery charge is less than 50% of the total battery capacity includes: The maximum discharge current is obtained according to the following formula: wherein the maximum discharge current is , the battery power is , the preset discharging current is 。 5. The battery discharge management method according to any one of claims 2-4, characterized in that, The step of obtaining and executing the discharge strategy of the energy storage battery, the photovoltaic power generation module and the mains power based on the battery discharge power, the photovoltaic discharge power and the load power includes: If the photovoltaic discharge power is greater than or equal to the load power, control the photovoltaic power generation module to supply power to the load; If the photovoltaic discharge power is less than the load power, and the sum of the battery discharge power and the photovoltaic discharge power is greater than or equal to the load power, the photovoltaic power generation module and the energy storage battery are controlled to supply power to the load. If the sum of the battery discharge power and the photovoltaic discharge power is less than the load power, the photovoltaic power generation module, the energy storage battery, and the mains power are controlled to supply power to the load.

6. The battery discharge management method of claim 5, wherein, The step of obtaining and executing the discharge strategy of the energy storage battery, the photovoltaic power generation module and the mains power based on the battery discharge power, the photovoltaic discharge power and the load power further includes: Obtain the battery discharge current from the battery information; When the battery discharge current is greater than or equal to the maximum discharge current, the inverter hybrid load power of the integrated inverter is reduced so that the battery discharge current does not exceed the maximum discharge current. When the battery discharge current is less than the maximum discharge current, the inverter hybrid load power of the integrated inverter is increased until the battery discharge current is equal to the maximum discharge current.

7. The battery discharge management method of claim 5, wherein, The step of obtaining and executing the discharge strategy of the energy storage battery, the photovoltaic power generation module and the mains power based on the battery discharge power, the photovoltaic discharge power and the load power includes: The preset discharge limit of the energy storage battery is set. When the battery charge is lower than the cutoff discharge charge, the energy storage battery stops discharging.

8. A battery discharge management system, characterized by, To implement the method according to any one of claims 1-7, comprising: Photovoltaic power generation modules are used for photovoltaic power generation. Energy storage battery modules are used to power the load; The acquisition module is used to acquire in real time the battery information of the energy storage battery, the photovoltaic discharge power of the photovoltaic power generation module, and the load power required by the load; A preset module is used to preset the preset discharge current of the energy storage battery and set the battery discharge power of the energy storage battery according to the preset discharge current and the battery information. The control module is used to obtain and execute the discharge strategies of the energy storage battery, the photovoltaic power generation module and the mains power based on the battery discharge power, the photovoltaic discharge power and the load power.

9. A computer-readable storage medium, characterized in that, The device stores a computer program that, when executed by a processor, causes the processor to perform the steps of the method as described in any one of claims 1 to 7.

10. A bidirectional integrated inverter, characterized by comprising: It includes a memory and a processor, the memory storing a computer program that, when executed by the processor, causes the processor to perform the steps of the method as described in any one of claims 1 to 7.

Images