Battery discharge management method and system, storage medium and inverse control integrated inverter

Abstract

The invention relates to the technical field of power supply, in particular to a battery discharge management method and system, a computer readable storage medium and an inverse control integrated inverter. 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 acquired in real time, and the preset discharge current is set according to the specification of the energy storage battery, so that the battery discharge power of the energy storage battery is set according to the preset discharge current and the battery information; therefore, the current allowed by the specification of the energy storage battery is not exceeded when the energy storage battery is discharged, and the maximum discharge power in the discharge process of the energy storage battery is set, so that the overcurrent protection of the energy storage battery is realized. Besides, the discharge strategy of the energy storage battery, the photovoltaic power generation module and the commercial power can be obtained and executed through the battery discharge power, the photovoltaic discharge power and the load power, so that the maximum discharge power of the energy storage battery can be realized in the discharge process on the premise of overcurrent protection, and the energy of the energy storage battery can be fully utilized.

Description

Technical Field

[0001] The present invention relates to the technical field of power supply, and in particular to a battery discharge management method, system, computer-readable storage medium and inverter-control integrated inverter. Background Art

[0002] The inverter-control integrated inverter integrates photovoltaic power generation modules, energy storage batteries, inverters and controllers, and can supply power to loads through two power supply methods: inverter and AC power. The inverter power supply energy comes from photovoltaic power generation modules and energy storage batteries.

[0003] When the photovoltaic power generation module and the energy storage battery provide inverter power to the load, the energy storage battery faces the problem of bearing all the load energy alone due to the unstable energy of the photovoltaic power generation module. When the energy storage battery is low in power, the load power can easily exceed the power that the energy storage battery can bear; in the prior art, the inverter will immediately switch to the mains to provide energy to the load in order to protect the energy storage battery. However, this method of switching to the mains mode easily leads to the energy of the energy storage battery not being fully utilized. Summary of the invention

[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-control integrated inverter to solve the problem that the energy of energy storage batteries cannot be fully utilized in the prior art.

[0005] The battery discharge management method provided in the embodiment of the present invention is applied to an inverter with integrated inverter control, wherein the inverter with integrated inverter control includes an energy storage battery and a photovoltaic power generation module, and is externally connected to a mains supply. The energy storage battery, the photovoltaic power generation module and the mains supply inside the inverter with integrated inverter control can all supply power to a load, and the battery discharge management method includes: obtaining 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; setting a preset discharge current according to the specification 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; obtaining and executing the discharge strategy of the energy storage battery, the photovoltaic power generation module and the mains supply according to 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 also includes: obtaining the battery power and the battery discharge voltage in the battery information; obtaining the maximum discharge current of the energy storage battery according to the battery power 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 according to the battery power and the preset discharge current includes: when the battery power accounts for greater than or equal to 50% of the total battery capacity, using the preset discharge current as the maximum discharge current; when the battery power accounts for less than 50% of the total battery capacity, obtaining the maximum discharge current according to the preset discharge current and the battery power.

[0008] Optionally, when the battery power accounts for less than 50% of the total battery capacity, the step of obtaining the maximum discharge current according to the preset discharge current and the battery power includes:

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

[0010] I max =2*C BAT *I BMS

[0011] Wherein, the maximum discharge current is I max , the battery capacity is C BAT , the preset discharge current is I BMS .

[0012] Optionally, the step of 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 includes: if the photovoltaic discharge power is greater than or equal to the load power, controlling 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, controlling the photovoltaic power generation module and the energy storage battery 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, controlling the photovoltaic power generation module, the energy storage battery and the mains power to supply power to the load.

[0013] Optionally, the step of acquiring and executing the discharge strategy of the energy storage battery, the photovoltaic power generation module and the AC power according to the battery discharge power, the photovoltaic discharge power and the load power also includes: acquiring 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 inverter with integrated control 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, increasing the inverter hybrid load power of the inverter with integrated control until the battery discharge current is equal to the maximum discharge current.

[0014] Optionally, the step of acquiring and executing the discharge strategy of the energy storage battery, the photovoltaic power generation module and the mains according to the battery discharge power, the photovoltaic discharge power and the load power includes: presetting a cut-off discharge power of the energy storage battery; when the battery power is lower than the cut-off discharge power, the energy storage battery stops discharging.

[0015] 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, used for photovoltaic power generation; an energy storage battery module, used for powering the load; an acquisition module, used for real-time acquisition of 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, used for preset a 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; a control module, used for acquiring and executing the discharge strategy of the energy storage battery, the photovoltaic power generation module and the mains according to the battery discharge power, the photovoltaic discharge power and the load power.

[0016] 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 executes the steps of the above method.

[0017] Another technical solution adopted by the present invention to solve its technical problem is: to provide an inverter with integrated inverter control, including a memory and a processor, the memory stores a computer program, and when the computer program is executed by the processor, the processor executes the steps of the above method.

[0018] Compared with the prior art, the battery discharge management method provided by the embodiment of the present invention has the beneficial effect of: 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 the 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 to ensure that the current allowed by the specifications of the energy storage battery will not be exceeded when the energy storage battery is discharged, and the maximum discharge power of the energy storage battery during the discharge process is set to achieve overcurrent protection for the energy storage battery. In addition, by acquiring and executing the discharge strategy of the energy storage battery, the photovoltaic power generation module and the mains according to the battery discharge power, the photovoltaic discharge power and the load power, the energy storage battery can achieve the maximum discharge power during the discharge process under the premise of overcurrent protection, thereby ensuring that the energy of the energy storage battery can be fully utilized. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The specific implementation of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments, in which:

[0020] Figure 1 is a flow chart of an embodiment of a battery discharge management method provided by an embodiment of the present invention;

[0021] Figure 2 It is a structural schematic diagram of an embodiment of a battery discharge management system provided by the present invention;

[0022] Figure 3 It is a structural schematic diagram of an embodiment of the inverter with integrated inverter and control provided by the present invention;

[0023] Figure 4 It is a structural schematic diagram of an embodiment of a computer-readable storage medium provided by the present invention.

[0024] The reference numerals in the figures are:

[0025] 20. Battery discharge management system; 21. Photovoltaic power generation module; 22. Energy storage battery module; 23. Acquisition module; 24. Preset module; 25. Control module;

[0026] 30. Computer readable storage medium; 31. Computer program;

[0027] 40. Inverter-control integrated inverter; 41. Processor; 42. Memory. DETAILED DESCRIPTION

[0028] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. Now, in conjunction with the accompanying drawings, the preferred embodiments of the present invention are described in detail.

[0029] The present invention provides a battery discharge management method. Figure 1 , Figure 1 It is a flow chart of an embodiment of the battery discharge management method provided by the present invention. The battery discharge management method provided by the present invention is applied to an inverter with integrated inverter control, which includes an energy storage battery and a photovoltaic power generation module, and the inverter with integrated inverter control is externally connected to the mains, and the energy storage battery, photovoltaic power generation module and mains inside the inverter with integrated inverter control can all supply power to the load. The battery discharge management method provided by the present invention includes the following steps:

[0030] S101: 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.

[0031] In a specific implementation scenario, when discharging the energy storage battery in the inverter with integrated control, it is necessary to obtain 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. Specifically, the battery information of the energy storage battery includes the battery power, the battery discharge voltage, and the battery discharge current. The inverter with integrated control has a BMS (Battery Management System) module, which can monitor and obtain the battery power, battery discharge voltage, and battery discharge current of the energy storage battery in real time through various sensors in the module. The multiple controllers integrated in the inverter with integrated control can monitor the power generation voltage and power generation current of the photovoltaic power generation module in real time by using the MPPT (Maximum Power Point Tracking) technology, and track the maximum power generation power of the photovoltaic power generation module in real time according to the power generation voltage and power generation current of the photovoltaic power generation module, and use the maximum power generation power as the photovoltaic discharge power, so as to obtain the photovoltaic discharge power of the photovoltaic power generation module in real time. The load power required by different loads is not the same. The inverter with integrated control can obtain the load power required by the load by monitoring the voltage and current at the load end.

[0032] S102: setting a preset discharge current according to the specification of the energy storage battery, and setting a battery discharge power of the energy storage battery according to the preset discharge current and battery information.

[0033] 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, and 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, so as to perform overcurrent protection on the energy storage battery, thereby effectively protecting the energy storage battery during the discharge process.

[0034] Furthermore, the battery discharge power of the energy storage battery can be set according to the preset discharge current and the battery information. Specifically, the battery power and the battery discharge voltage in the battery information are obtained, so as to obtain the maximum discharge current of the energy storage battery according to the battery power and the preset discharge current, and obtain the battery discharge power according to the battery discharge voltage and the maximum discharge current, thereby setting the maximum discharge power of the energy storage battery during the discharge process.

[0035] In a specific implementation scenario, when the energy storage battery is discharged, the maximum discharge current of the energy storage battery is obtained according to the battery power and the preset discharge current. Specifically, when the battery power accounts for more than or equal to 50% 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, when the energy storage battery has a large amount of power, the energy storage battery can be discharged according to the current allowed by the specifications, thereby achieving the maximum discharge power. As a result, when the battery power 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.

[0036] When the battery charge accounts for less than 50% of the total battery capacity, the maximum discharge current is obtained according to the preset discharge current and the battery charge. In a specific implementation scenario, when the battery charge accounts for less than 50% of the total battery capacity, the energy storage battery will enter a derated discharge state, at which time the maximum discharge current of the battery can be derated in real time according to the real-time charge of the energy storage battery. The maximum discharge current of the energy storage battery in the derated discharge state can be obtained according to the following formula:

[0037] I max =2*C BAT *I BMS

[0038] Among them, the maximum discharge current is I max , the battery charge is C BAT , the preset discharge current is I BMS .

[0039] Specifically, when the battery power 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 according to the real-time attenuation of the power of the energy storage battery, so as to achieve dynamic adjustment of the maximum discharge current, thereby dynamically adjusting the maximum discharge power of the energy storage battery. In this way, it can be ensured that when the power of the energy storage battery is low, the energy storage battery can still achieve the maximum discharge power according to the power, thereby ensuring that the energy of the energy storage battery can be maximized without exceeding the maximum discharge current and the maximum discharge power of the energy storage battery, effectively avoiding the situation in the prior art where the load power exceeds the power that the energy storage battery can bear and directly switches to the mains power supply.

[0040] S103: Obtain and execute the discharge strategies of the energy storage battery, photovoltaic power generation module and mains according to 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, and there is a surplus after meeting the load power required by the load. While the photovoltaic power generation module supplies power to the load alone, the part of the photovoltaic power generation module that exceeds the load power can be used to charge the energy storage battery. In this way, the energy of the photovoltaic power generation module can be fully utilized, so that when the photovoltaic power generation power is insufficient or at night, the energy storage battery can release energy to power 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, and the photovoltaic power generation module and the energy storage battery need to be mixed and supplied at the same time to meet the load power.

[0043] 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 are controlled 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 means 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 inverter-control 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 to supply power to the load with the power of the difference value.

[0044] By obtaining and executing the discharge strategies of energy storage batteries, photovoltaic power generation modules and AC power according to the battery discharge power, photovoltaic discharge power and load power, the energy supply of energy storage batteries, photovoltaic power generation modules and AC power can be dynamically adjusted to maximize the use of energy storage batteries and ensure that the integrated inverter can provide stable power supply to the load under various circumstances.

[0045] Furthermore, in the process of executing the discharge strategy of the energy storage battery, photovoltaic power generation module and mains power, the inverter with integrated inverter control can obtain the battery discharge current in the battery information, and adjust the inverter hybrid load power of the inverter with integrated inverter control according to 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 hybrid load power of the inverter with integrated inverter control 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 inverter with integrated inverter control is increased until the battery discharge current is equal to 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 inverter-control 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, so that the actual battery discharge power of the energy storage battery approaches 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 when 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, thyristor) in the inverter to regulate the size of the inverter output current of the inverter-controlled integrated 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 a specific embodiment, the discharge strategy also includes presetting a cut-off discharge capacity of the energy storage battery. When the battery capacity is lower than the cut-off discharge capacity, the energy storage battery stops discharging. Exemplarily, in this embodiment, the cut-off discharge capacity can be preset to account for 5% of the total battery capacity. By presetting the cut-off discharge capacity, the energy storage battery can be effectively protected, and while maximizing the use of the energy of the energy storage battery, damage caused by excessive discharge of the energy storage battery can be avoided, which helps to improve the stability and reliability of the energy storage battery discharge and extend the battery life.

[0049] It can be known from the above description that the battery discharge management method provided by the embodiment of the present invention obtains 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 sets the preset discharge current according to the specifications of the energy storage battery, thereby setting the battery discharge power of the energy storage battery according to the preset discharge current and the battery information to ensure that the current allowed by the specifications of the energy storage battery will not be exceeded when the energy storage battery is discharged, and the maximum discharge power of the energy storage battery during the discharge process is set to achieve overcurrent protection for the energy storage battery. In addition, by obtaining and executing the discharge strategy of the energy storage battery, the photovoltaic power generation module and the mains according to the battery discharge power, the photovoltaic discharge power and the load power, the energy storage battery can achieve the maximum discharge power during the discharge process under the premise of overcurrent protection, thereby ensuring that the energy of the energy storage battery can be fully utilized.

[0050] See also Figure 2 , Figure 2 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 to supply power to the load; the acquisition module 23 is used to obtain 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 the battery information; the control module 25 is used to obtain and execute the discharge strategy of the energy storage battery, the photovoltaic power generation module 21 and the mains according to the battery discharge power, the photovoltaic discharge power and the load power.

[0052] The acquisition module 23 is also used to obtain the battery power and battery discharge voltage in the battery information; obtain the maximum discharge current of the energy storage battery according to the battery power and the preset discharge current; and obtain the battery discharge power according to 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; when the battery power accounts for less than 50% of the total battery capacity, obtain the maximum discharge current according to the preset discharge current and the battery power.

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

[0055] I max =2*C BAT *I BMS

[0056] Among them, the maximum discharge current is I max , the battery charge is C BAT , the preset discharge current is I BMS .

[0057] 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; 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, control the photovoltaic power generation module and the energy storage battery 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, control the photovoltaic power generation module, the energy storage battery and the AC power to supply power to the load.

[0058] The acquisition module 23 is also used to acquire the battery discharge current in the battery information.

[0059] The control module 25 is also used to reduce the inverter hybrid load power of the inverter with integrated inverter control 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; when the battery discharge current is less than the maximum discharge current, increase the inverter hybrid load power of the inverter with integrated inverter control until the battery discharge current is equal to the maximum discharge current.

[0060] The preset module 24 is also used to preset the cut-off discharge capacity of the energy storage battery.

[0061] The control module 25 is also used to stop the energy storage battery from discharging when the battery power is lower than the cut-off discharge power.

[0062] See also Figure 3 , Figure 3 3 is a schematic diagram of a computer readable storage medium 30 according to an embodiment of 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 following Figure 1 In one embodiment, the computer readable storage medium 30 may be a storage chip, a hard disk, a mobile hard disk, a USB flash drive, an optical disk, or other readable and writable storage tools in the final layer, or a server, etc.

[0063] In one embodiment, the computer-readable storage medium 30 may be a storage chip, a hard disk, or a mobile hard disk, a USB flash drive, an optical disk, or other readable and writable storage tools in a terminal, or a server, etc.

[0064] See also Figure 4 , Figure 4 1 is a schematic diagram of the structure of an embodiment of the inverter 40 provided by the present invention. The inverter 40 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. The processor 41 executes the computer program 31 when working to implement the following. Figure 1 The method shown.

[0065] The technical details of the specific method implemented when the above-mentioned inverter-control integrated inverter 40 executes the computer program 31 have been discussed in detail in the above-mentioned method steps, so they will not be repeated here.

[0066] A person of ordinary skill in the art can understand that all or part of the processes in the above-mentioned embodiment method can be implemented by instructing the relevant hardware through a computer program 31. 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 above-mentioned methods.

[0067] Among them, any reference to memory, storage, database or other media used in the embodiments provided in the present 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. As an illustration and not limitation, RAM is available in various forms, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDRSDRAM), enhanced SDRAM (ESDRAM), synchronous link (Synchlink) DRAM (SLDRAM), memory bus (Rambus) direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM).

[0068] It should be noted that the limitations on the various steps involved in this scheme, without affecting the implementation of the specific scheme, are not deemed to limit the order of the steps. The steps written in the front can be executed first, or can be executed later, or even simultaneously. As long as this scheme can be implemented, it should be regarded as belonging to the scope of protection of the present invention.

[0069] It should be understood that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. For those skilled in the art, the technical solutions described in the above embodiments can be modified, or some of the technical features therein can be replaced by equivalents; and all these modifications and replacements should fall within the scope of protection of the claims attached to the present invention.

Claims

1. A battery discharge management method, characterized in that: Applied to an inverter with integrated inverter control, the inverter with integrated inverter control includes an energy storage battery and a photovoltaic power generation module, and is externally connected to a mains supply. The energy storage battery, the photovoltaic power generation module and the mains supply inside the inverter with integrated inverter control can all supply power to a load. The battery discharge management method includes: Acquire 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; Setting a preset discharge current according to the specification of the energy storage battery, and setting a battery discharge power of the energy storage battery 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 are obtained and executed according to the battery discharge power, the photovoltaic discharge power and the load power.

2. The battery discharge management method according to claim 1, characterized in that: The step of setting a preset discharge current according to the specification 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 also includes: Obtaining the battery power and battery discharge voltage from the battery information; Acquire the maximum discharge current of the energy storage battery according to the battery power and the preset discharge current; The battery discharge power is obtained according to the battery discharge voltage and the maximum discharge current.

3. The battery discharge management method according to claim 2, characterized in that: The step of obtaining the maximum discharge current of the energy storage battery according to the battery power and the preset discharge current comprises: When the battery power 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 power accounts for less than 50% of the total battery capacity, the maximum discharge current is obtained according to the preset discharge current and the battery power.

4. The battery discharge management method according to claim 3, characterized in that: When the battery power accounts for less than 50% of the total battery capacity, the step of obtaining the maximum discharge current according to the preset discharge current and the battery power comprises: The maximum discharge current is obtained according to the following formula: I max =2*C BAT *I BMS Wherein, the maximum discharge current is I max , the battery capacity is C BAT , the preset discharge current is I BMS .

5. The battery discharge management method according to any one of claims 2 to 4, characterized in that: The step of acquiring and executing the discharge strategy of the energy storage battery, the photovoltaic power generation module and the mains according to the battery discharge power, the photovoltaic discharge power and the load power comprises: If the photovoltaic discharge power is greater than or equal to the load power, controlling 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, control the photovoltaic power generation module and the energy storage battery 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 according to claim 5, characterized in that: The step of 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 also includes: Obtaining a battery discharge current from 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 inverter-control integrated inverter 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 inverter-control integrated inverter is increased until the battery discharge current is equal to the maximum discharge current.

7. The battery discharge management method according to claim 5, characterized in that: The step of acquiring and executing the discharge strategy of the energy storage battery, the photovoltaic power generation module and the mains according to the battery discharge power, the photovoltaic discharge power and the load power comprises: Presetting the cut-off discharge capacity of the energy storage battery; When the battery power is lower than the cut-off discharge power, the energy storage battery stops discharging.

8. A battery discharge management system, characterized in that: The method for implementing any one of claims 1 to 7 comprises: Photovoltaic power generation module, used for photovoltaic power generation; Energy storage battery module, used to supply power to the load; An acquisition module, used 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, used to preset a preset discharge current of the energy storage battery, and set a battery discharge power of the energy storage battery according to the preset discharge current and the battery information; A control module is used to obtain and execute the discharge strategy of the energy storage battery, the photovoltaic power generation module and the mains according to the battery discharge power, the photovoltaic discharge power and the load power.

9. A computer-readable storage medium, characterized in that: A computer program is stored, and when the computer program is executed by a processor, the processor is caused to perform the steps of the method according to any one of claims 1 to 7.

10. An inverter with integrated inverter and control, characterized in that: The method comprises a memory and a processor, wherein the memory stores a computer program, and when the computer program is executed by the processor, the processor executes the steps of the method according to any one of claims 1 to 7.

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