Solar photovoltaic energy storage system

Abstract

The utility model discloses a solar photovoltaic energy storage system, which relates to the technical field of photovoltaic energy storage, charges a storage battery in a time-phased manner by adopting a quick charging mode through an anti-countercurrent voltage stabilizing circuit, adds a load power detection module and a load voltage and current detection circuit at a load, and uploads load power, voltage and current to a monitoring system. The output of the inverter is ensured not to exceed the limit value, so that the output power of the photovoltaic power supply is ensured, countercurrent is effectively avoided, and energy is saved; meanwhile, current and voltage parameters and power of a storage battery and a load are collected in real time, parameter adjustment and system monitoring are achieved through communication with an intelligent monitoring module, then an inverter bridge inverter circuit is controlled through a driving circuit to achieve voltage stabilization control, and then it is guaranteed that output voltage is rapidly kept stable when the system is suddenly loaded or deloaded; according to the utility model, on the premise of ensuring reliable operation of the system, the on-off state of the AC contactor is controlled according to the electricity price time period, the charging or discharging of the battery is indirectly controlled, and the charging and discharging of the energy storage battery are managed, so that the purpose of peak load shifting of electric power utilization is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of photovoltaic energy storage, in particular to a solar photovoltaic energy storage system. Background Art

[0002] With the optimization of the global energy mix, solar energy is increasingly favored as a clean, renewable energy source, with photovoltaic power generation receiving particular attention. With the intensifying energy crisis and rising environmental awareness, the development and utilization of new energy sources is gaining increasing attention. Solar energy, as an inexhaustible, efficient, and pollution-free energy source, has recently gained even greater favor. Photovoltaic power generation base stations are typically used as standalone power systems in remote areas, requiring extended operating times. Photovoltaic power generation technology is a global trend in the development of new energy sources, demanding greater system efficiency, reliability, and cost-effectiveness.

[0003] Currently, PV power stations are primarily constructed in various forms, including ground-mounted power stations (including those in deserts and mountainous areas), distributed power stations (rooftops in industrial parks and public buildings), facility agriculture power stations, multi-energy complementary power stations (fish-solar, hydro-solar, and wind-solar), and small household PV power stations. Depending on the application of PV power stations, PV inverters have developed rapidly, resulting in the emergence of various inverter solutions: centralized, string, and distributed.

[0004] A DC power supply system consists of an AC input, a switching power supply circuit, a battery, and a load. The battery serves as a backup battery, ensuring normal operation of the load when the AC input fails. Due to the excellent power supply conditions of my country's power grid and the very stable AC power, batteries operate in a floating charge state for long periods of time, wasting some power. To maximize the value of batteries while ensuring reliable power supply to the load, many electricity users, battery manufacturers, and power equipment manufacturers have developed "peak shaving and valley filling" energy storage control systems based on switching power supply circuits. These technologies primarily utilize newly added "peak shaving and valley filling" controllers to indirectly control the switching power supply operation mode or add "peak shaving and valley filling" control functions to the controllers in the switching power supply circuits. This allows the battery to switch from its original floating charge energy consumption mode to a "peak shaving and valley filling" cyclic operation mode, improving the battery's value, rationally utilizing electricity resources, and generating economic benefits.

[0005] Existing "peak shaving and valley filling" control schemes are all centered around the switching power supply circuit. By controlling the output voltage of the switching power supply to be lower than the battery voltage, the battery is discharged. However, during the actual implementation process, it was found that the controller of the switching power supply circuit is generally an old product. It is difficult to add the "peak shaving and valley filling" control function to the controller of the switching power supply circuit itself. In addition, the software interfaces of the switching power supply controllers of different manufacturers are different. It is also difficult to implement the newly added "peak shaving and valley filling" controller to indirectly control the operating mode of the switching power supply. Therefore, the current scheme of indirectly controlling the operating mode of the switching power supply by adding a "peak shaving and valley filling" controller or adding the "peak shaving and valley filling" control function to the controller of the switching power supply circuit is not feasible. Utility Model Content

[0006] The technical problem to be solved by the present invention is to provide a solar photovoltaic energy storage system in response to the shortcomings of the background technology. It uses a reverse current protection voltage stabilization circuit and a fast charging method to charge the rechargeable battery in time periods. A load power detection module and a load voltage and current detection circuit are added to the load, and the load power and voltage and current are uploaded to the controller module. Under the premise of ensuring reliable operation of the system, the on and off state of the AC contactor is controlled according to the electricity price period, and the battery charging or discharging is indirectly controlled. The charging and discharging of the energy storage battery is managed, thereby achieving the purpose of peak shaving and valley filling of electricity consumption.

[0007] The present invention adopts the following technical solutions to solve the above technical problems:

[0008] Solar photovoltaic energy storage system, including solar panels, anti-reverse current voltage stabilization circuit, rechargeable battery, full-bridge circuit, high-frequency transformer, rectifier circuit, inverter bridge inverter circuit, filter circuit, load, load output voltage and current sampling module, load power detection module, power supply voltage and current detection circuit, drive circuit, controller module, energy storage converter, energy storage module, display module, clock module, memory module, AC input terminal, contactor control circuit, AC contactor, switching power supply circuit;

[0009] The signal output end of the solar panel is connected to the signal input end of the rechargeable battery through an anti-backcurrent voltage stabilizing circuit, the signal output end of the rechargeable battery is connected to the signal input end of the full-bridge circuit, the signal output end of the full-bridge circuit is connected to the signal input end of the high-frequency transformer, the signal output end of the high-frequency transformer is connected to the signal input end of the rectifier circuit, the signal output end of the rectifier circuit is connected to the signal input end of the inverter bridge inverter circuit, the signal output end of the inverter bridge inverter circuit is connected to the signal input end of the filter circuit, and the signal output end of the filter circuit is connected to the load; the controller module is connected to the energy storage module through the energy storage converter; the load output voltage and current sampling module and the load power detection module are respectively The controller module is connected to the load and is used to detect the output voltage, current and power of the load in real time; the power supply voltage and current detection circuit is connected to the battery and is used to detect the voltage and current parameters of the battery in real time; the controller module is connected to the load through the load output voltage and current sampling module and the load power detection module respectively, the controller module is connected to the inverter bridge inverter circuit through the drive circuit, and the controller module is connected to the battery through the power supply voltage and current detection circuit; the display module, clock module and memory module are respectively connected to the controller module; the controller module is connected to the AC contactor through the contactor control circuit, the AC input end is connected to the switching power supply circuit through the AC contactor, and the switching power supply circuit is connected to the load.

[0010] As a further preferred embodiment of the solar photovoltaic energy storage system of the present invention, the inverter bridge inverter circuit includes a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5, a resistor R6, a resistor R8, a capacitor C1, a capacitor C2, a capacitor C3, a capacitor C4, a capacitor C5, a capacitor C6, a capacitor E1, a capacitor E2, a capacitor E3, a capacitor E4, a capacitor E5, a capacitor E6, a diode D3, a diode D4, an input terminal, an OUT2 terminal, a +48V voltage terminal, a -48V voltage terminal, a +12V voltage terminal, a -12V voltage terminal, a chip AD811, and a chip PB50;

[0011] Among them, the input end is connected to one end of the resistor R1, the other end of the resistor R1 is respectively connected to one end of the resistor R2, one end of the capacitor C6 and pin 2 of the chip AD811, the pin 3 of the chip AD811 is grounded, the pin 4 of the chip AD811 is respectively connected to the -12V voltage end and one end of the capacitor C1, the other end of the capacitor C1 is grounded, the pin 7 of the chip AD811 is respectively connected to the +12V voltage end and one end of the capacitor C2, the other end of the capacitor C2 is grounded, the output end of the chip AD811 is connected to pin 4 of the chip PB50, the pin 3 of the chip PB50 is respectively connected to the +48V voltage end, one end of the capacitor C3, the positive electrode of the capacitor E1, the positive electrode of the capacitor E3, and the positive electrode of the capacitor E4, the other end of the capacitor C3 is grounded, the negative electrode of the capacitor E1 is respectively connected to the negative electrode of the capacitor E3 and the negative electrode of the capacitor E4 and grounded, the pin 2 of the chip PB50 is connected to one end of the resistor R6, the chip PB Pin 1 of 50 is connected to one end of resistor R5, pin 8 of chip PB50 is connected to one end of capacitor C5, pin 7 of chip PB50 is connected to one end of resistor R4, pin 5 of chip PB50 is grounded, pin 6 of chip PB50 is respectively connected to the -48V voltage terminal, the negative electrode of capacitor E4, one end of capacitor C4, the negative electrode of capacitor E5, and the negative electrode of capacitor E6, the positive electrode of capacitor E4 is respectively connected to the other end of capacitor C4, the positive electrode of capacitor E5, and the positive electrode of capacitor E6, the other end of resistor R6 is respectively connected to the other end of resistor R5, the other end of resistor R4, the other end of resistor R2, and one end of resistor R3, the other end of resistor R3 is connected to the other end of capacitor C6, the other end of capacitor C5 is respectively connected to the positive electrode of diode D3, the negative electrode of diode D4 and OUT2 terminal, the negative electrode of diode D3 is connected to the +48V voltage terminal, and the positive electrode of diode D4 is connected to the -48V voltage terminal.

[0012] As a further preferred embodiment of the solar photovoltaic energy storage system of the present invention, the anti-reverse current voltage stabilizing circuit includes a voltage input Vin terminal, a capacitor C11, a capacitor C21, a chip LM2596, an inductor L11, a diode D31, a diode D41, and a voltage output Vout terminal. The voltage input Vin terminal is respectively connected to one end of the capacitor C11 and the +VIN pin of the chip LM2596, the other end of the capacitor C11 is grounded, the GND pin of the chip LM2596 is grounded, the ON / OFF pin of the chip LM2596 is grounded, the OUTPUT pin of the chip LM2596 is respectively connected to one end of the inductor L11 and the cathode of the diode D31, the FEEDBACK pin of the chip LM2596 is respectively connected to the other end of the inductor L11, the anode of the diode D41, and one end of the capacitor C21, the other end of the capacitor C21 is grounded, the anode of the diode D31 is grounded, and the cathode of the diode D41 is connected to the voltage output Vout terminal.

[0013] As a further preferred solution of the solar photovoltaic energy storage system of the present invention, the solar panel is an 18V 330W foldable photovoltaic panel.

[0014] As a further preferred solution of the solar photovoltaic energy storage system of the present invention, the high-frequency transformer adopts an industrial frequency transformer.

[0015] As a further preferred solution of the solar photovoltaic energy storage system of the present invention, the controller module adopts the N32G457 MCU controller, which has a 32-bit high-performance ARM Cortex-M4F core and an operating frequency of up to 144MHz.

[0016] As a further preferred solution of the solar photovoltaic energy storage system of the present invention, the power supply voltage and current detection circuit adopts a Hall sensor.

[0017] As a further preferred solution of the solar photovoltaic energy storage system of the present invention, the rectifier circuit adopts a half-wave rectifier circuit.

[0018] As a further preferred solution of the solar photovoltaic energy storage system of the present invention, the memory module adopts DDR3 memory.

[0019] As a further preferred solution of the solar photovoltaic energy storage system of the present invention, the display module adopts a digital display screen.

[0020] Compared with the prior art, the above technical solution adopted by the present invention has the following technical effects:

[0021] 1. The utility model solar photovoltaic energy storage system includes a solar panel, an anti-reverse current voltage stabilizing circuit, a rechargeable battery, a full-bridge circuit, a high-frequency transformer, a rectifier circuit, an inverter bridge inverter circuit, a filter circuit, a load, a load output voltage and current sampling module, a load power detection module, a power supply voltage and current detection circuit, a drive circuit, a controller module, an energy storage converter, an energy storage module, a display module, a clock module, a memory module, an AC input terminal, a contactor control circuit, an AC contactor, and a switching power supply circuit; it uses an anti-reverse current voltage stabilizing circuit and a fast charging method to charge the battery in time periods, adds a load power detection module and a load voltage and current detection circuit at the load, and compares the load power and voltage and current. It is uploaded to the monitoring system to ensure that the inverter output does not exceed the limit, thereby ensuring the output power of the photovoltaic power supply, effectively avoiding reverse flow, and saving energy; at the same time, the current, voltage parameters and power of the battery and load are collected in real time, and parameter adjustment and system monitoring are achieved through communication with the intelligent monitoring module, and then the inverter bridge inverter circuit is controlled by the drive circuit to achieve voltage stabilization control, thereby ensuring that the output voltage of the system quickly remains stable when suddenly loaded or unloaded; under the premise of ensuring reliable operation of the system, the utility model controls the on and off state of the AC contactor according to the electricity price period, indirectly controls the battery charging or discharging, and manages the charging and discharging of the energy storage battery, thereby achieving the purpose of peak shaving and valley filling of electricity consumption;

[0022] 2. The utility model includes a load output voltage and current sampling module, a load power detection module, a power supply voltage and current detection circuit, a drive circuit, a controller module, an energy storage converter, an energy storage module, an AC input terminal, a contactor control circuit, an AC contactor, and a switching power supply circuit; in power smoothing control, the energy storage system adopts dual-loop control, the inner loop controls the energy storage battery current, and the outer loop is divided into two situations: 1) the power outer loop when the power grid is normal; 2) the voltage outer loop when the power grid fails. The system not only has maximum power tracking and grid-connected power generation functions, but also has a grid-connected power smoothing function. When the power grid is disconnected due to a fault, the system stores photovoltaic power generation energy into lithium iron phosphate batteries, thereby improving power generation efficiency and ensuring the stability of the DC bus voltage. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is the overall structural principle diagram of the utility model solar photovoltaic energy storage system;

[0024] Figure 2 This is a circuit diagram of the utility model's anti-backflow voltage stabilizing circuit;

[0025] Figure 3 It is a circuit diagram of the clock module of the utility model. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention:

[0027] Solar photovoltaic energy storage systems, such as Figure 1 As shown, it includes a solar panel, an anti-reverse current voltage stabilizing circuit, a rechargeable battery, a full-bridge circuit, a high-frequency transformer, a rectifier circuit, an inverter bridge inverter circuit, a filter circuit, a load, a load output voltage and current sampling module, a load power detection module, a power supply voltage and current detection circuit, a drive circuit, a controller module, an energy storage converter, an energy storage module, a display module, a clock module, a memory module, an AC input terminal, a contactor control circuit, an AC contactor, and a switching power supply circuit;

[0028] The signal output end of the solar panel is connected to the signal input end of the rechargeable battery through an anti-backcurrent voltage stabilizing circuit, the signal output end of the rechargeable battery is connected to the signal input end of the full-bridge circuit, the signal output end of the full-bridge circuit is connected to the signal input end of the high-frequency transformer, the signal output end of the high-frequency transformer is connected to the signal input end of the rectifier circuit, the signal output end of the rectifier circuit is connected to the signal input end of the inverter bridge inverter circuit, the signal output end of the inverter bridge inverter circuit is connected to the signal input end of the filter circuit, and the signal output end of the filter circuit is connected to the load; the controller module is connected to the energy storage module through the energy storage converter; the load output voltage and current sampling module and the load power detection module are respectively The controller module is connected to the load and is used to detect the output voltage, current and power of the load in real time; the power supply voltage and current detection circuit is connected to the battery and is used to detect the voltage and current parameters of the battery in real time; the controller module is connected to the load through the load output voltage and current sampling module and the load power detection module respectively, the controller module is connected to the inverter bridge inverter circuit through the drive circuit, and the controller module is connected to the battery through the power supply voltage and current detection circuit; the display module, clock module and memory module are respectively connected to the controller module; the controller module is connected to the AC contactor through the contactor control circuit, the AC input end is connected to the switching power supply circuit through the AC contactor, and the switching power supply circuit is connected to the load.

[0029] Among them, a rechargeable battery is used to provide electrical energy, wherein the electrical energy can be charged by a new energy source;

[0030] Full-bridge circuit, used to reduce the internal resistance of lithium iron phosphate batteries,

[0031] High-frequency transformer, used to convert the voltage of lithium iron phosphate battery into high voltage;

[0032] A rectifier circuit, used for rectifying the converted high voltage;

[0033] Inverter bridge inverter circuit, used to convert high voltage into alternating current;

[0034] The filter circuit is used to filter the alternating current.

[0035] The utility model discloses a solar photovoltaic energy storage system, comprising a solar panel, an anti-reverse current voltage stabilizing circuit, a rechargeable battery, a full-bridge circuit, a high-frequency transformer, a rectifier circuit, an inverter bridge inverter circuit, a filter circuit, a load, a load output voltage and current sampling module, a load power detection module, a power supply voltage and current detection circuit, a drive circuit, a controller module, an energy storage converter, an energy storage module, a display module, a clock module, a memory module, an AC input terminal, a contactor control circuit, an AC contactor, and a switching power supply circuit; the utility model adopts a fast charging method to charge the battery in time periods through an anti-reverse current voltage stabilizing circuit, and adds a load power detection module and a load voltage and current detection circuit at the load to measure the load power and voltage and current. The data is transmitted to the monitoring system to ensure that the inverter output does not exceed the limit, thereby ensuring the output power of the photovoltaic power supply, effectively avoiding reverse flow, and saving energy. At the same time, the current, voltage parameters and power of the battery and load are collected in real time, and parameter adjustment and system monitoring are achieved through communication with the intelligent monitoring module. Then, the inverter bridge inverter circuit is controlled by the drive circuit to achieve voltage stabilization control, thereby ensuring that the output voltage of the system quickly remains stable when suddenly loaded or unloaded. Under the premise of ensuring reliable operation of the system, the utility model controls the on and off state of the AC contactor according to the electricity price period, indirectly controls the battery charging or discharging, and manages the charging and discharging of the energy storage battery, thereby achieving the purpose of peak shaving and valley filling of electricity consumption.

[0036] The utility model includes a load output voltage and current sampling module, a load power detection module, a power supply voltage and current detection circuit, a drive circuit, a controller module, an energy storage converter, an energy storage module, an AC input terminal, a contactor control circuit, an AC contactor, and a switching power supply circuit. In power smoothing control, the energy storage system adopts dual-loop control, the inner loop controls the current of the energy storage battery, and the outer loop is divided into two situations: 1) the power outer loop when the power grid is normal; 2) the voltage outer loop when the power grid fails. The system not only has maximum power tracking and grid-connected power generation functions, but also has a grid-connected power smoothing function. When the power grid is disconnected due to a fault, the system stores photovoltaic power generation energy into the lithium iron phosphate battery, thereby improving power generation efficiency and ensuring the stability of the DC bus voltage.

[0037] Specifically, the peak-shaving and valley-filling controller controls the AC input power distribution mode of the switching power supply circuit to discharge the battery during peak electricity price periods and charge it during valley electricity price periods.

[0038] The peak-shaving and valley-filling controller is located between the AC input part and the switching power supply circuit. Under the premise of ensuring reliable power supply to the load, during peak electricity price periods, the peak-shaving and valley-filling controller disconnects the AC input of the switching power supply circuit, forcing the battery to discharge to the load; during off-peak electricity price periods, the AC input of the switching power supply circuit is closed, and the switching power supply circuit resumes normal operation, charging the battery and discharging the load, thereby achieving the purpose of peak-shaving and valley-filling.

[0039] The AC input part is a power input distribution unit, which supplies power to the switching power supply circuit. The switching power supply system charges the battery and supplies power to the load. The peak shaving and valley filling controller can cut off and close the AC input.

[0040] The switching power supply circuit is the power conversion part, which converts AC power into DC power. When the AC input is disconnected, the switching power supply circuit will stop working and will not supply power to the DC bus, and the battery will start to discharge to the load. When the AC input is closed, the switching power supply circuit will resume working and charge the battery.

[0041] The battery is a DC power storage device that receives DC power from the switching power supply and stores energy. When the switching power supply stops working, the battery can continue to supply power to the load.

[0042] The peak shaving and valley filling controller is embedded between the AC input part and the switching power supply system. The peak shaving and valley filling controller collects the battery charging current and discharging current, collects the real-time voltage of the battery, and outputs a control signal to the AC contactor control coil. The peak shaving and valley filling controller calculates the battery capacity in real time based on the collected battery current. The peak shaving and valley filling controller determines the current battery operation status based on the collected battery voltage and the calculated battery capacity. The peak shaving and valley filling controller pre-stores the time definitions of peak periods and valley periods, disconnects the AC contactor during peak periods, and closes the AC contactor during valley periods. When the battery capacity is lower than the lower limit, the peak shaving and valley filling controller controls the AC contactor to close.

[0043] The collected voltage and current parameters are uploaded to the MCU controller in real time. The microcontroller module summarizes and pre-processes the received voltage and current parameters. When a fault occurs, a fault signal is sent first. When the parameters need to be modified, the data is received and the corresponding parameters are modified. The drive circuit controls the inverter circuit to achieve voltage stabilization control, thereby ensuring that the output voltage of the system quickly remains stable when the system is suddenly loaded or unloaded.

[0044] The MCU controller determines faults based on voltage and current sampling values ​​and blocks the PWM output when a fault occurs. The LiFePO4 battery undervoltage and overvoltage protections are self-recovering. When the LiFePO4 battery voltage returns to normal, the system soft-starts and resumes normal operation.

[0045] The MCU controller uses the N32G457 MCU controller, featuring a high-performance 32-bit ARM Cortex-M4F core operating at up to 144MHz. This 32-bit high-performance ARM Cortex-M4F core, operating at up to 144MHz, and 144KB of SRAM enable efficient inverter control algorithm calculation and processing. Built-in high-performance analog interfaces, four 12-bit 5Msps high-speed ADCs supporting differential mode, and four rail-to-rail operational amplifiers meet the high-speed A / D conversion requirements for current and voltage sampling and detection. The chip offers a rich set of communication interfaces, including seven serial ports, three SPI interfaces, four I2C interfaces, and two CAN bus interfaces. These numerous main communication interfaces accommodate communication with various devices, including digital tube displays. High-precision timer resources include two advanced timers, each with four independent channels. Three of these channels support six complementary PWM outputs, achieving a maximum control accuracy of 6.9nS, providing the control precision required by the inverter drive circuit. High reliability, the chip operates in a temperature range of -40°C to 105°C, and can operate stably in various harsh outdoor weather conditions. A built-in cryptographic algorithm hardware acceleration engine provides hardware-level security.

[0046] like Figure 2 As shown, the inverter bridge inverter circuit includes a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5, a resistor R6, a resistor R8, a capacitor C1, a capacitor C2, a capacitor C3, a capacitor C4, a capacitor C5, a capacitor C6, a capacitor E1, a capacitor E2, a capacitor E3, a capacitor E4, a capacitor E5, a capacitor E6, a diode D3, a diode D4, an input terminal, an OUT2 terminal, a +48V voltage terminal, a -48V voltage terminal, a +12V voltage terminal, a -12V voltage terminal, a chip AD811, and a chip PB50;

[0047] Among them, the input end is connected to one end of the resistor R1, the other end of the resistor R1 is respectively connected to one end of the resistor R2, one end of the capacitor C6 and pin 2 of the chip AD811, the pin 3 of the chip AD811 is grounded, the pin 4 of the chip AD811 is respectively connected to the -12V voltage end and one end of the capacitor C1, the other end of the capacitor C1 is grounded, the pin 7 of the chip AD811 is respectively connected to the +12V voltage end and one end of the capacitor C2, the other end of the capacitor C2 is grounded, the output end of the chip AD811 is connected to pin 4 of the chip PB50, the pin 3 of the chip PB50 is respectively connected to the +48V voltage end, one end of the capacitor C3, the positive electrode of the capacitor E1, the positive electrode of the capacitor E3, and the positive electrode of the capacitor E4, the other end of the capacitor C3 is grounded, the negative electrode of the capacitor E1 is respectively connected to the negative electrode of the capacitor E3 and the negative electrode of the capacitor E4 and grounded, the pin 2 of the chip PB50 is connected to one end of the resistor R6, the chip PB Pin 1 of 50 is connected to one end of resistor R5, pin 8 of chip PB50 is connected to one end of capacitor C5, pin 7 of chip PB50 is connected to one end of resistor R4, pin 5 of chip PB50 is grounded, pin 6 of chip PB50 is respectively connected to the -48V voltage terminal, the negative electrode of capacitor E4, one end of capacitor C4, the negative electrode of capacitor E5, and the negative electrode of capacitor E6, the positive electrode of capacitor E4 is respectively connected to the other end of capacitor C4, the positive electrode of capacitor E5, and the positive electrode of capacitor E6, the other end of resistor R6 is respectively connected to the other end of resistor R5, the other end of resistor R4, the other end of resistor R2, and one end of resistor R3, the other end of resistor R3 is connected to the other end of capacitor C6, the other end of capacitor C5 is respectively connected to the positive electrode of diode D3, the negative electrode of diode D4 and OUT2 terminal, the negative electrode of diode D3 is connected to the +48V voltage terminal, and the positive electrode of diode D4 is connected to the -48V voltage terminal.

[0048] The utility model inverter bridge inverter circuit has a metal shell appearance package, which is convenient for overall installation on the radiator, and is conducive to long-term operation in high-power output occasions. The operating voltage of PB50 is positive or negative 30V to positive or negative 100V, and can obtain a continuous 2A DC current output. It has voltage and current gain, high voltage change rate, and can reach an operating frequency of up to 160KHz and a current accuracy of up to 12mA.

[0049] like Figure 3As shown, the anti-reverse current voltage stabilization circuit includes a voltage input Vin terminal, a capacitor C11, a capacitor C21, a chip LM2596, an inductor L11, a diode D31, a diode D41, and a voltage output Vout terminal. The voltage input Vin terminal is respectively connected to one end of the capacitor C11 and the +VIN pin of the chip LM2596, the other end of the capacitor C11 is grounded, the GND pin of the chip LM2596 is grounded, the ON / OFF pin of the chip LM2596 is grounded, the OUTPUT pin of the chip LM2596 is respectively connected to one end of the inductor L11 and the cathode of the diode D31, the FEEDBACK pin of the chip LM2596 is respectively connected to the other end of the inductor L11, the anode of the diode D41, and one end of the capacitor C21, the other end of the capacitor C21 is grounded, the anode of the diode D31 is grounded, and the cathode of the diode D41 is connected to the voltage output Vout terminal.

[0050] The utility model adopts a fast charging method through an anti-reverse current voltage-stabilizing circuit to charge two lead-crystal batteries with a DC voltage of 12V and a capacity of 75Ah in different time periods. In order to achieve fast charging and take into account the conversion efficiency of the solar panel, the utility model uses an 18V 330W foldable photovoltaic panel. When each battery is fully charged, it can provide 0.9 kilowatts of electricity per hour. In order to increase the service life of the battery, a 10% power reserve is set.

[0051] Preferably, the solar panel is an 18V 330W foldable photovoltaic panel, and the high-frequency transformer is an industrial frequency transformer. The controller module uses the N32G457 MCU controller, which features a high-performance 32-bit ARM Cortex-M4F core and operates at a main frequency of up to 144MHz. The power supply voltage and current detection circuit uses a Hall effect sensor, the rectification circuit uses a half-wave rectification circuit, the memory module uses DDR3 memory, and the display module uses a digital display.

[0052] It will be understood by those skilled in the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as generally understood by those skilled in the art in the field to which the present invention belongs. It should also be understood that terms such as those defined in common dictionaries should be understood to have meanings consistent with their meanings in the context of the prior art, and will not be interpreted in an idealized or overly formal sense unless defined as such herein.

[0053] The above embodiments are only for the purpose of illustrating the technical concept of the present invention and are not intended to limit the scope of protection of the present invention. Any modifications made based on the technical solution in accordance with the technical concept of the present invention shall fall within the scope of protection of the present invention. The above embodiments of the present invention are described in detail, but the present invention is not limited to the above embodiments. Various modifications can be made within the scope of knowledge possessed by ordinary technicians in this field without departing from the purpose of the present invention.

Claims

1. Solar photovoltaic energy storage system, characterized by: It includes solar panels, anti-reverse current voltage stabilization circuit, rechargeable battery, full-bridge circuit, high-frequency transformer, rectifier circuit, inverter bridge inverter circuit, filter circuit, load, load output voltage and current sampling module, load power detection module, power supply voltage and current detection circuit, drive circuit, controller module, energy storage converter, energy storage module, display module, clock module, memory module, AC input terminal, contactor control circuit, AC contactor, switching power supply circuit; The signal output end of the solar panel is connected to the signal input end of the rechargeable battery through an anti-backcurrent voltage stabilizing circuit, the signal output end of the rechargeable battery is connected to the signal input end of the full-bridge circuit, the signal output end of the full-bridge circuit is connected to the signal input end of the high-frequency transformer, the signal output end of the high-frequency transformer is connected to the signal input end of the rectifier circuit, the signal output end of the rectifier circuit is connected to the signal input end of the inverter bridge inverter circuit, the signal output end of the inverter bridge inverter circuit is connected to the signal input end of the filter circuit, and the signal output end of the filter circuit is connected to the load; the controller module is connected to the energy storage module through the energy storage converter; the load output voltage and current sampling module and the load power detection module are respectively The controller module is connected to the load and is used to detect the output voltage, current and power of the load in real time; the power supply voltage and current detection circuit is connected to the battery and is used to detect the voltage and current parameters of the battery in real time; the controller module is connected to the load through the load output voltage and current sampling module and the load power detection module respectively, the controller module is connected to the inverter bridge inverter circuit through the drive circuit, and the controller module is connected to the battery through the power supply voltage and current detection circuit; the display module, clock module and memory module are respectively connected to the controller module; the controller module is connected to the AC contactor through the contactor control circuit, the AC input end is connected to the switching power supply circuit through the AC contactor, and the switching power supply circuit is connected to the load.

2. The solar photovoltaic energy storage system according to claim 1, characterized in that: The inverter bridge inverter circuit includes a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5, a resistor R6, a resistor R8, a capacitor C1, a capacitor C2, a capacitor C3, a capacitor C4, a capacitor C5, a capacitor C6, a capacitor E1, a capacitor E2, a capacitor E3, a capacitor E4, a capacitor E5, a capacitor E6, a diode D3, a diode D4, an input terminal, an OUT2 terminal, a +48V voltage terminal, a -48V voltage terminal, a +12V voltage terminal, a -12V voltage terminal, a chip AD811, and a chip PB50; Among them, the input end is connected to one end of the resistor R1, the other end of the resistor R1 is respectively connected to one end of the resistor R2, one end of the capacitor C6 and pin 2 of the chip AD811, the pin 3 of the chip AD811 is grounded, the pin 4 of the chip AD811 is respectively connected to the -12V voltage end and one end of the capacitor C1, the other end of the capacitor C1 is grounded, the pin 7 of the chip AD811 is respectively connected to the +12V voltage end and one end of the capacitor C2, the other end of the capacitor C2 is grounded, the output end of the chip AD811 is connected to pin 4 of the chip PB50, the pin 3 of the chip PB50 is respectively connected to the +48V voltage end, one end of the capacitor C3, the positive electrode of the capacitor E1, the positive electrode of the capacitor E3, and the positive electrode of the capacitor E4, the other end of the capacitor C3 is grounded, the negative electrode of the capacitor E1 is respectively connected to the negative electrode of the capacitor E3 and the negative electrode of the capacitor E4 and grounded, the pin 2 of the chip PB50 is connected to one end of the resistor R6, the chip PB Pin 1 of 50 is connected to one end of resistor R5, pin 8 of chip PB50 is connected to one end of capacitor C5, pin 7 of chip PB50 is connected to one end of resistor R4, pin 5 of chip PB50 is grounded, pin 6 of chip PB50 is respectively connected to the -48V voltage terminal, the negative electrode of capacitor E4, one end of capacitor C4, the negative electrode of capacitor E5, and the negative electrode of capacitor E6, the positive electrode of capacitor E4 is respectively connected to the other end of capacitor C4, the positive electrode of capacitor E5, and the positive electrode of capacitor E6, the other end of resistor R6 is respectively connected to the other end of resistor R5, the other end of resistor R4, the other end of resistor R2, and one end of resistor R3, the other end of resistor R3 is connected to the other end of capacitor C6, the other end of capacitor C5 is respectively connected to the positive electrode of diode D3, the negative electrode of diode D4 and OUT2 terminal, the negative electrode of diode D3 is connected to the +48V voltage terminal, and the positive electrode of diode D4 is connected to the -48V voltage terminal.

3. The solar photovoltaic energy storage system according to claim 1, characterized in that: The anti-reverse current voltage stabilization circuit includes a voltage input Vin terminal, a capacitor C11, a capacitor C21, a chip LM2596, an inductor L11, a diode D31, a diode D41, and a voltage output Vout terminal. The voltage input Vin terminal is respectively connected to one end of the capacitor C11 and the +VIN pin of the chip LM2596, the other end of the capacitor C11 is grounded, the GND pin of the chip LM2596 is grounded, the ON / OFF pin of the chip LM2596 is grounded, the OUTPUT pin of the chip LM2596 is respectively connected to one end of the inductor L11 and the cathode of the diode D31, the FEEDBACK pin of the chip LM2596 is respectively connected to the other end of the inductor L11, the anode of the diode D41, and one end of the capacitor C21, the other end of the capacitor C21 is grounded, the anode of the diode D31 is grounded, and the cathode of the diode D41 is connected to the voltage output Vout terminal.

4. The solar photovoltaic energy storage system according to claim 1, characterized in that: The solar panels are 18V330W foldable photovoltaic panels.

5. The solar photovoltaic energy storage system according to claim 1, characterized in that: The high frequency transformer adopts an industrial frequency transformer.

6. The solar photovoltaic energy storage system according to claim 1, characterized in that: The controller module adopts the N32G457 MCU controller, which has a 32-bit high-performance ARM Cortex-M4F core and runs at a main frequency of up to 144MHz.

7. The solar photovoltaic energy storage system according to claim 1, characterized in that: The power supply voltage and current detection circuit adopts a Hall sensor.

8. The solar photovoltaic energy storage system according to claim 1, characterized in that: The rectifier circuit adopts a half-wave rectifier circuit.

9. The solar photovoltaic energy storage system according to claim 1, characterized in that: The memory module adopts DDR3 memory.

10. The solar photovoltaic energy storage system according to claim 1, characterized in that: The display module adopts a digital display screen.

Images