A precisely controlled energy storage system

Abstract

The application relates to the technical field of energy storage systems, and provides an energy storage system with precise control, which comprises an MCU control chip, a BOOST photovoltaic boost circuit, an electric quantity management circuit and an inverter circuit; the BOOST photovoltaic boost circuit is connected with the MCU control chip and is used for receiving a photovoltaic BOOST boost instruction sent by the MCU control chip; the input end of the electric quantity management circuit is connected with the MCU control chip and is used for receiving an electric quantity management instruction sent by the MCU control chip; the output end of the electric quantity management circuit is connected with the BOOST photovoltaic boost circuit and is used for performing corresponding electric quantity management on the BOOST photovoltaic boost circuit; and the input end of the inverter circuit is connected with the electric quantity management circuit, and the output end is connected with the MCU control chip and is used for transmitting a voltage inversion signal to the MCU control chip; the application adopts a multi-point type electric quantity detection feedback system, which mainly detects and feeds back the front stage and the rear stage of the BOOST photovoltaic boost circuit and the inverter circuit in real time, so that precise control is realized.

Description

Technical Field

[0001] This invention relates to the field of energy storage system technology, and more specifically, to a precisely controlled energy storage system. Background Technology

[0002] As a renewable energy source, solar energy not only solves the problem of economical electricity consumption but is also a clean and environmentally friendly energy source. Its usage in the entire power system is increasing day by day. However, conventional photovoltaic power generation systems often suffer from unstable DC voltage control in the Boost converter and inadequate maximum power point tracking for stored energy. In particular, three-phase full-bridge inverter circuits often employ non-isolated inverter structures to improve solar energy conversion efficiency. This structure is prone to leakage current, which can lead to conducted and radiated interference, increased harmonics in the grid current, and losses, and may even endanger equipment and personnel safety. Summary of the Invention

[0003] The problem solved by this invention is to modify conventional BOOST circuits and inverter control circuits.

[0004] To address the aforementioned problems, this invention provides a precision-controlled energy storage system, comprising: an MCU control chip, a BOOST photovoltaic boost circuit, a power management circuit, and an inverter circuit. The BOOST photovoltaic boost circuit is connected to the MCU control chip and is used to receive photovoltaic BOOST boost commands issued by the MCU control chip. The input terminal of the power management circuit is connected to the MCU control chip and is used to receive power management commands issued by the MCU control chip. The output terminal of the power management circuit is connected to the BOOST photovoltaic boost circuit and is used to perform corresponding power management on the BOOST photovoltaic boost circuit. The input terminal of the inverter circuit is connected to the power management circuit, and the output terminal is connected to the MCU control chip, used to transmit voltage inversion signals to the MCU control chip.

[0005] Furthermore, the input terminal of the MCU control chip is connected to the power supply, the signal terminal is connected to the first crystal oscillator, the control terminal is connected to the first limit switch, the output terminal is grounded, and the protection terminal is equipped with a filter capacitor.

[0006] Furthermore, the BOOST photovoltaic boost circuit includes two current sensing chips, three MOSFET control interfaces, four operational amplifier chips, a power input interface, and a power output interface. The input terminal of the first current sensing chip is connected to the power input interface, and its output terminal is connected to the input terminals of the first and second operational amplifier chips, respectively. The output terminals of the first and second operational amplifier chips are connected to the MCU control chip. The control terminal of the first current sensing chip is connected to the first, second, and third MOSFET control interfaces, respectively, and its signal terminal is connected to the input terminal of the second current sensing chip. The control terminal of the second current sensing chip is connected to the input terminals of the third and fourth operational amplifier chips, respectively. The output terminals of the third and fourth operational amplifier chips are connected to the MCU control chip, and their output terminals are connected to the power output interface.

[0007] Furthermore, the power management circuit includes a power detection circuit and a current amplification circuit. The power detection circuit includes a power detection chip. The input terminal of the power detection chip is connected to the power supply, the output terminal is connected to the current amplification circuit, and the control terminal is connected to the MCU control chip for receiving power detection commands issued by the MCU control chip.

[0008] Furthermore, the current amplification circuit includes a current output chip and two current amplification chips. The input terminal of the first current amplification chip is connected to the power supply, the control terminal is connected to the MCU control chip, and the output terminal is connected to the input terminal of the second current amplification chip. The output terminal of the second current amplification chip is connected to the input terminal of the current output chip. The output terminal of the current output chip is connected to the power detection chip, and the control terminal is connected to the MCU control chip for receiving current amplification commands issued by the MCU control chip.

[0009] Furthermore, the inverter circuit includes two digital isolator chips, two integrated driver chips, logic gate circuits, a three-phase current detection chip, a third current amplifier chip, a sampling resistor, a relay control circuit, a first transistor, and an AC output interface. The input of the logic gate circuit is connected to the MCU control chip, and the output is connected to the two digital isolator chips respectively. The input of the two digital isolator chips is connected to the power supply, and the output is connected to the two integrated driver chips respectively. The input of the two integrated driver chips is connected to the power supply, and the output is connected to the three-phase current detection chip. The protection terminal is connected to a filter capacitor. The input of the three-phase current detection chip is connected to the power supply, and the output is connected to the third current amplifier chip. The control terminal is connected to the input of the sampling resistor. The control terminal of the sampling resistor is connected to the MCU control chip. The control terminal is connected to the relay control circuit. The input of the relay control circuit is connected to the power supply, and the control terminal is connected to the collector of the first transistor. The emitter of the first transistor is grounded, and the base is connected to the MCU control chip. The output of the relay control circuit is connected to the AC output interface.

[0010] Furthermore, it also includes a DC output circuit, which includes a three-phase power interface circuit, a rectifier bridge circuit, a rectifier chip, a power controller chip, and a current protection circuit. The three-phase power interface circuit is connected to the input terminal of the rectifier bridge circuit, the output terminal of the rectifier bridge circuit is connected to the input terminal of the rectifier chip, the output terminal of the rectifier chip is connected to the input terminal of the power controller chip, the output terminal of the power controller chip is connected to an optocoupler, and the control terminal of the power controller chip is connected to the current protection circuit.

[0011] Furthermore, it also includes peripheral circuitry, which includes a display control circuit, a data management circuit, and a voltage regulator circuit. The display control circuitry includes an LCD touch screen, a second transistor, and a touch driver chip. The input terminal of the LCD touch screen is connected to the power supply, the output terminal is connected to the input terminal of the touch driver chip, and the control terminal is connected to the collector of the second transistor. The emitter of the second transistor is grounded, and the base is connected to the MCU control chip. The input terminal of the touch driver chip is connected to the power supply, and the control terminal is connected to the MCU control chip.

[0012] Furthermore, the data management circuit includes a data communication circuit and a data storage circuit. The data communication circuit includes an Ethernet circuit, a CAN communication circuit, and a 485 communication circuit. The Ethernet circuit includes an Ethernet chip, a USB interface circuit, and a second crystal oscillator. The input terminal of the Ethernet chip is connected to a power supply, the output terminal is connected to the USB interface circuit, the signal terminal is connected to the second crystal oscillator, and the control terminal is connected to the MCU control chip. The CAN communication circuit includes a CAN communication chip and a CAN communication interface. The input terminal of the CAN communication chip is connected to a power supply, the output terminal is connected to the CAN communication interface, and the control terminal is connected to the MCU control chip. The 485 communication circuit includes a 485 communication chip and a 485 communication interface. The input terminal of the 485 communication chip is connected to a power supply, the output terminal is connected to the 485 communication interface, and the control terminal is connected to the MCU control chip. The data storage circuit includes a flash memory chip. The input terminal of the flash memory chip is connected to a power supply, and the output terminal is connected to the MCU control chip.

[0013] Furthermore, it also includes a voltage regulator circuit, which comprises four voltage regulator chips. The first voltage regulator chip has its input terminal connected to a 5V power supply and its output terminal connected to a 3.3V power supply. The second voltage regulator chip has its input terminal connected to a 12V power supply and its output terminal connected to a 5V power supply. The third voltage regulator chip has its input terminal connected to a battery power supply and its output terminal connected to a 5V power supply. The fourth voltage regulator chip has its input terminal connected to a 3.3V power supply and its output terminal connected to a 1.8V power supply.

[0014] Compared with existing technologies, the beneficial effects of this invention are: This system can achieve high-precision MPPT solar charging and energy storage, while simultaneously outputting three-phase power through the inverter circuit and conventional DC power output through the DC output circuit. The circuit incorporates multiple power management circuits, enabling multi-point sampling feedback, energy metering, and wireless data reporting. The overall solution consists of an MPPT solar charging module with dual-channel BOOST photovoltaic boost circuits, an isolated inverter circuit, a DC output circuit, and a power detection circuit. The dual-channel BOOST photovoltaic boost circuits primarily utilize the MPPT principle to charge the battery through the BOOST boost structure, and the power detection... The circuit detects the BOOST pre-stage and post-stage, and adjusts the duty cycle of the PWM drive signal of the voltage regulator circuit according to the changes, thereby achieving real-time tracking of the maximum power point in the solar panel to maximize the efficiency of the solar panel. When the battery voltage is higher than the rated voltage, the boost circuit is in a resting state, and energy is delivered to the inverter circuit through its diodes. At the same time, the inverter section completes MPPT tracking. When the voltage drops to the rated voltage, the inverter circuit no longer performs MPPT work. At this time, the photovoltaic boost circuit takes over the control of MPPT, continues to track MPPT, and boosts the voltage to ensure that its voltage output tends to be stable. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall principle structure of Embodiment 1 of the present invention;

[0016] Figure 2 This is a schematic diagram of the principle structure of the MCU control chip in Embodiment 2 of the present invention;

[0017] Figure 3 This is a schematic diagram of the principle structure of the BOOST photovoltaic boost circuit in Embodiment 3 of the present invention;

[0018] Figure 4 This is a schematic diagram of the power management circuit in Embodiment 4 of the present invention.

[0019] Figure 5 This is a schematic diagram of the principle structure of the current amplification circuit in Embodiment 5 of the present invention;

[0020] Figure 6 , Figure 7 This is a schematic diagram of the inverter circuit in Embodiment 6 of the present invention.

[0021] Figure 8 This is a schematic diagram of the DC output circuit of Embodiment 7 of the present invention.

[0022] Figure 9 This is a schematic diagram of the display control circuit according to Embodiment 8 of the present invention;

[0023] Figure 10 , Figure 11 This is a schematic diagram of the data management circuit in Embodiment 9 of the present invention.

[0024] Figure 12 This is a schematic diagram of the principle structure of the voltage regulator circuit in Embodiment 10 of the present invention.

[0025] Explanation of reference numerals in the attached figures:

[0026] 1-MCU control chip; 2-BOOST photovoltaic boost circuit; 3-Power management circuit; 4-Inverter circuit. Detailed Implementation

[0027] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0028] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0029] In the description of this specification, references to terms such as "embodiment," "one embodiment," and "one implementation" indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or implementation is included in at least one embodiment or illustrative implementation of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or implementation. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or implementations.

[0030] like Figure 1 As shown, the present invention provides a precise control energy storage system, including: an MCU control chip 1, a BOOST photovoltaic boost circuit 2, a power management circuit 3, and an inverter circuit 4. The BOOST photovoltaic boost circuit 2 is connected to the MCU control chip 1 and is used to receive photovoltaic BOOST boost commands issued by the MCU control chip 1. The input terminal of the power management circuit 3 is connected to the MCU control chip 1 and is used to receive power management commands issued by the MCU control chip 1. The output terminal of the power management circuit 3 is connected to the BOOST photovoltaic boost circuit 2 and is used to perform corresponding power management on the BOOST photovoltaic boost circuit 2. The input terminal of the inverter circuit 4 is connected to the power management circuit 3, and the output terminal is connected to the MCU control chip 1, used to transmit voltage inversion signals to the MCU control chip 1.

[0031] It should be noted that, in this embodiment, as Figure 1As shown, in order to efficiently utilize solar energy, the system adopts the MPPT principle, connecting multiple photovoltaic boost circuits in parallel. The entire charging system uses two sets of triple BOOST photovoltaic boost circuits 2, and simultaneously monitors the input and output terminals of the BOOST photovoltaic boost circuits 2 in real time. While realizing MPPT charging, it also increases the number of photovoltaic inputs. In terms of application, it considers both self-use and grid connection. For self-use, it uses AC inverter and DC conversion to convert and utilize power resources. For grid connection, it uses inverter circuit 4 to invert excess power into three-phase power and connect it to the grid. The power management circuit 3 is set at the input terminals of the BOOST photovoltaic boost circuit 2 and inverter circuit 4 in the circuit system, which facilitates real-time and accurate calculation of the power storage process, and can further improve circuit safety.

[0032] In one embodiment of the present invention, the input terminal of the MCU control chip 1 is connected to a power supply, the signal terminal is connected to a first crystal oscillator, the control terminal is connected to a first limit switch, the output terminal is grounded, and a filter capacitor is provided at the protection terminal.

[0033] It should be noted that, in this embodiment, as Figure 2 As shown, the MCU control chip 1 serves as the central brain of the entire energy storage system. It is designed with multiple connection interfaces to connect various functional modules. The first crystal oscillator can measure the time of the MCU control chip 1, the limit switch can close the circuit command function, and the filter capacitor circuit makes the system work more stably.

[0034] In one embodiment of the present invention, the BOOST photovoltaic boost circuit 2 includes two current sensing chips, three MOSFET control interfaces, four operational amplifier chips, a power input interface, and a power output interface. The input terminal of the first current sensing chip is connected to the power input interface, and the output terminal is connected to the input terminals of the first and second operational amplifier chips respectively. The output terminals of the first and second operational amplifier chips are connected to the MCU control chip 1. The control terminal of the first current sensing chip is connected to the first, second, and third MOSFET control interfaces respectively, and the signal terminal is connected to the input terminal of the second current sensing chip. The control terminal of the second current sensing chip is connected to the input terminals of the third and fourth operational amplifier chips respectively. The output terminals of the third and fourth operational amplifier chips are connected to the MCU control chip 1, and the output terminal is connected to the power output interface.

[0035] It should be noted that, in this embodiment, as Figure 3As shown, the BOOST photovoltaic boost circuit 2 uses the MPPT principle to charge the battery through the BOOST boost structure. By continuously detecting the current and voltage changes of the photovoltaic array at the input and output terminals of the BOOST photovoltaic boost circuit 2, and adjusting the duty cycle of the PWM drive signal of the DC converter according to the current and voltage changes, it can achieve real-time tracking of the sun's direction, ensuring that the light shines perpendicularly on the solar absorber, thereby maximizing the efficiency of solar energy storage. Through real-time tracking of maximum power, more electricity can be obtained, thereby improving charging efficiency. Moreover, when the battery voltage is higher than the required voltage, the boost circuit is in a resting state, and energy is delivered to the inverter circuit 4 through its diodes. At the same time, the inverter circuit 4 completes MPPT tracking. When the voltage drops to the required voltage, the boost circuit is in a working state, tracking the MPPT, and simultaneously boosting to ensure its output voltage stability.

[0036] In one embodiment of the present invention, the power management circuit 3 includes a power detection circuit and a current amplification circuit. The power detection circuit includes a power detection chip. The input terminal of the power detection chip is connected to a power supply, the output terminal is connected to the current amplification circuit, and the control terminal is connected to the MCU control chip 1 for receiving power detection commands issued by the MCU control chip 1.

[0037] It should be noted that, in this embodiment, as Figure 4 As shown, the power management circuit 3 mainly performs continuous detection and real-time feedback on the BOOST photovoltaic boost circuit 2, the inverter circuit 4, and the front and rear stages of the current output circuit, thereby achieving overall drive controllability and high precision. At the same time, it performs overall power output measurement through real-time current and voltage parameters and transmits the data to the MCU control chip 1. The system has an additional power detection circuit, which can use data feedback to show the working status of each part of the system circuit, further improving the stability of the energy storage system.

[0038] In one embodiment of the present invention, the current amplification circuit includes a current output chip and two current amplification chips. The input terminal of the first current amplification chip is connected to a power supply, the control terminal is connected to the MCU control chip 1, and the output terminal is connected to the input terminal of the second current amplification chip. The output terminal of the second current amplification chip is connected to the input terminal of the current output chip. The output terminal of the current output chip is connected to the power detection chip, and the control terminal is connected to the MCU control chip 1 for receiving current amplification commands issued by the MCU control chip 1.

[0039] It should be noted that, in this embodiment, as Figure 5 As shown, the current amplifier circuit achieves two-stage current amplification through two current amplifier chips. When the operating voltage is constant, the energy storage efficiency of the circuit energy storage system is improved by increasing the current.

[0040] In one embodiment of the present invention, the inverter circuit 4 includes two digital isolator chips, two integrated driver chips, logic gate circuits, a three-phase current detection chip, a third current amplifier chip, a sampling resistor, a relay control circuit, a first transistor, and an AC output interface. The input terminal of the logic gate circuit is connected to the MCU control chip 1, and the output terminal is connected to the two digital isolator chips respectively. The input terminal of the two digital isolator chips is connected to the power supply, and the output terminal is connected to the two integrated driver chips respectively. The input terminal of the two integrated driver chips is connected to the power supply, and the output terminal is connected to the three-phase current detection chip. The protection terminal is connected to a filter capacitor. The input terminal of the three-phase current detection chip is connected to the power supply, and the output terminal is connected to the third current amplifier chip. The control terminal is connected to the input terminal of the sampling resistor. The control terminal of the sampling resistor is connected to the MCU control chip 1 and the relay control circuit. The input terminal of the relay control circuit is connected to the power supply, and the control terminal is connected to the collector of the first transistor. The emitter of the first transistor is grounded, and the base is connected to the MCU control chip 1. The output terminal of the relay control circuit is connected to the AC output interface.

[0041] It should be noted that, in this embodiment, as Figure 6 , Figure 7 As shown, for safety reasons, two digital isolator chips are designed into the circuit, and high-quality MOSFETs are used. Based on the switching of the MOSFETs and the dual isolation of the digital isolator chips, the circuit drive is ensured to be stable. The inverter process before and after inversion is also monitored. On the one hand, this improves the quality and efficiency of the inverter, and on the other hand, it can perform power calculation. The initial inverter circuit output is three-phase power. Multiple sets are connected in parallel to increase the output power of the three-phase power. For household use, it is mainly AC and DC. The three-phase power can be formed by taking one live wire and one neutral wire to form the household 220 AC power. It can also be output as DC power through the AC output interface. The overall inverter circuit has a complete self-protection mechanism and stable power output.

[0042] In one embodiment of the present invention, a DC output circuit is further included. The DC output circuit includes a three-phase power interface circuit, a rectifier bridge circuit, a rectifier chip, a power controller chip, and a current protection circuit. The three-phase power interface circuit is connected to the input terminal of the rectifier bridge circuit. The output terminal of the rectifier bridge circuit is connected to the input terminal of the rectifier chip. The output terminal of the rectifier chip is connected to the input terminal of the power controller chip. The output terminal of the power controller chip is connected to an optocoupler. The control terminal of the power controller chip is connected to the current protection circuit.

[0043] It should be noted that, in this embodiment, as Figure 8As shown, the DC output circuit mainly outputs DC24V power. The entire circuit uses a power controller chip for front-end power factor correction. The DC output circuit uses three-phase power as input power and converts AC to DC power through a rectifier bridge circuit. The circuit also includes a power management circuit 3 and a current protection circuit to ensure safe and stable current output. The back end uses an optocoupler and a primary-side regulating flyback controller to achieve quasi-resonant flyback conversion of voltage.

[0044] In one embodiment of the present invention, a peripheral circuit is further included. The peripheral circuit includes a display control circuit, a data management circuit, and a voltage regulator circuit. The display control circuit includes an LCD touch screen, a second transistor, and a touch driver chip. The input terminal of the LCD touch screen is connected to a power supply, the output terminal is connected to the input terminal of the touch driver chip, and the control terminal is connected to the collector of the second transistor. The emitter of the second transistor is grounded, and the base is connected to the MCU control chip 1. The input terminal of the touch driver chip is connected to a power supply, and the control terminal is connected to the MCU control chip 1.

[0045] It should be noted that, in this embodiment, as Figure 9 As shown, the display circuit is connected to the MCU control chip 1. The MCU control chip 1 can be used to adjust the on / off state of the display. The display is a touch LCD screen, and touch control of the display is achieved by connecting to the corresponding touch driver chip. The display is also equipped with a second transistor, and manual adjustment of the display can be achieved by adjusting the pins of the transistor. The display can be used for power detection and calculation, and the MCU control chip 1 can also be used to adjust other functional circuits through the display.

[0046] In one embodiment of the present invention, the data management circuit includes a data communication circuit and a data storage circuit. The data communication circuit includes an Ethernet circuit, a CAN communication circuit, and a 485 communication circuit. The Ethernet circuit includes an Ethernet chip, a USB interface circuit, and a second crystal oscillator. The input terminal of the Ethernet chip is connected to a power supply, the output terminal is connected to the USB interface circuit, the signal terminal is connected to the second crystal oscillator, and the control terminal is connected to the MCU control chip 1. The CAN communication circuit includes a CAN communication chip and a CAN communication interface. The input terminal of the CAN communication chip is connected to a power supply, the output terminal is connected to the CAN communication interface, and the control terminal is connected to the MCU control chip 1. The 485 communication circuit includes a 485 communication chip and a 485 communication interface. The input terminal of the 485 communication chip is connected to a power supply, the output terminal is connected to the 485 communication interface, and the control terminal is connected to the MCU control chip 1. The data storage circuit includes a flash memory chip. The input terminal of the flash memory chip is connected to a power supply, and the output terminal is connected to the MCU control chip 1.

[0047] It should be noted that, in this embodiment, as Figure 10 , Figure 11 As shown, the data communication circuit includes an Ethernet circuit, a CAN communication circuit, and a 485 communication circuit. These circuits can achieve wired or wireless connections with peripheral electronic devices through various means. The Ethernet circuit uses a wireless chip to achieve wired connections with the main controller and wireless connections with peripheral electronic devices. Simultaneously, a crystal oscillator is connected to the signal terminal for time measurement. The CAN and 485 communication circuits achieve wired connections with peripheral electronic devices through corresponding pins on the MCU control chip 1. Wired connections allow for higher-speed data transmission. The circuit incorporates multiple communication methods, enabling data transmission through different pathways and adapting to the complex working environment of energy storage devices. The data storage circuit uses a flash memory chip for data storage, facilitating data retrieval by the MCU control chip 1 and allowing for long-term storage of the flash memory data. The data parameters stored in the data storage circuit can serve as a reference for the normal operation of the energy storage system, providing more comprehensive protection for the system.

[0048] In one embodiment of the present invention, a voltage regulator circuit is further included, the voltage regulator circuit comprising four voltage regulator chips: the input terminal of the first voltage regulator chip is connected to a 5V power supply, and the output terminal is connected to a 3.3V power supply; the input terminal of the second voltage regulator chip is connected to a 12V power supply, and the output terminal is connected to a 5V power supply; the input terminal of the third voltage regulator chip is connected to a battery power supply, and the output terminal is connected to a 5V power supply; the input terminal of the fourth voltage regulator chip is connected to a 3.3V power supply, and the output terminal is connected to a 1.8V power supply.

[0049] It should be noted that, in this embodiment, as Figure 1 As shown, the circuit incorporates multiple voltage regulators. The first voltage regulator chip is a 5V to 3.3V converter, primarily used to power the system's MCU control chip 1. The second voltage regulator chip is a 12V to 5V converter, primarily used to convert the lithium battery voltage to 5V. The third voltage regulator chip's input is connected to the battery power supply, i.e., a 24V DC power supply, and is primarily used to convert the 24V DC voltage to 5V. The fourth voltage regulator chip's input is connected to a 3.3V power supply, and its output is connected to a 1.8V power supply, primarily used to power small circuits. The circuit features multiple voltage regulators and can be applied to various circuits in energy storage systems.

[0050] While the disclosure is as stated above, its scope of protection is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of this disclosure, and all such changes and modifications will fall within the protection scope of this invention.

Claims

1. A precisely controlled energy storage system, characterized in that, include: The circuit comprises an MCU control chip (1), a BOOST photovoltaic boost circuit (2), a power management circuit (3), and an inverter circuit (4). The BOOST photovoltaic boost circuit (2) is connected to the MCU control chip (1) and is used to receive photovoltaic BOOST boost commands issued by the MCU control chip (1). The input terminal of the power management circuit (3) is connected to the MCU control chip (1) and is used to receive power management commands issued by the MCU control chip (1). The output terminal of the power management circuit (3) is connected to the BOOST photovoltaic boost circuit (2) and is used to perform corresponding power management on the BOOST photovoltaic boost circuit (2). The input terminal of the inverter circuit (4) is connected to the power management circuit (3), and the output terminal is connected to the MCU control chip (1) to transmit voltage inverter signals to the MCU control chip (1). The input terminal of the MCU control chip (1) is connected to the power supply, the signal terminal is connected to the first crystal oscillator, the control terminal is connected to the first limit switch, the output terminal is grounded, and the protection terminal is equipped with a filter capacitor. The BOOST photovoltaic boost circuit (2) includes two current sensing chips and three MO The circuit includes an S-tube control interface, four operational amplifier chips, a power input interface, and a power output interface. The input terminal of the first current sensing chip is connected to the power input interface, and the output terminal is connected to the input terminals of the first and second operational amplifier chips respectively. The output terminals of the first and second operational amplifier chips are connected to the MCU control chip (1). The control terminal of the first current sensing chip is connected to the first, second, and third MOS tube control interfaces respectively, and the signal terminal is connected to the input terminal of the second current sensing chip. The control terminal of the second current sensing chip is connected to the input terminals of the third and fourth operational amplifier chips respectively. The output terminals of the third and fourth operational amplifier chips are connected to the MCU control chip (1), and the output terminal is connected to the power output interface. The power management circuit (3) includes a power detection circuit and a current amplification circuit. The power detection circuit includes a power detection chip. The input terminal of the power detection chip is connected to the power supply, the output terminal is connected to the current amplification circuit, and the control terminal is connected to the MCU control chip (1) to receive the power detection command issued by the MCU control chip (1).The BOOST photovoltaic boost circuit (2) charges the battery through the BOOST boost structure. The MCU control chip (1) detects the BOOST pre-stage and post-stage through the power detection circuit and adjusts the duty cycle of the PWM drive signal of the voltage regulator circuit according to its changes, thereby realizing real-time tracking of the maximum power point in the solar panel to maximize the efficiency of the solar panel. When the battery voltage is higher than the rated voltage, the boost circuit is in a resting state, and energy is delivered to the inverter circuit through its diodes. At the same time, the inverter part completes MPPT tracking. When it reaches the rated voltage, the inverter circuit no longer undertakes the MPPT work. At this time, the photovoltaic boost circuit takes over the control of MPPT, continues to track MPPT, and boosts the voltage to ensure that its voltage output tends to be stable.

2. The precise control energy storage system according to claim 1, characterized in that, The current amplification circuit includes a current output chip and two current amplification chips. The input terminal of the first current amplification chip is connected to the power supply, the control terminal is connected to the MCU control chip (1), and the output terminal is connected to the input terminal of the second current amplification chip. The output terminal of the second current amplification chip is connected to the input terminal of the current output chip. The output terminal of the current output chip is connected to the power detection chip, and the control terminal is connected to the MCU control chip (1) to receive the current amplification command issued by the MCU control chip (1).

3. The precise control energy storage system according to claim 1, characterized in that, The inverter circuit (4) includes two digital isolator chips, two integrated driver chips, logic gate circuits, a three-phase current detection chip, a third current amplifier chip, a sampling resistor, a relay control circuit, a first transistor, and an AC output interface. The input terminal of the logic gate circuit is connected to the MCU control chip (1), and the output terminal is connected to the two digital isolator chips respectively. The input terminal of the two digital isolator chips is connected to the power supply, and the output terminal is connected to the two integrated driver chips respectively. The input terminal of the two integrated driver chips is connected to the power supply, and the output terminal is connected to the three-phase current detection chip. The protection terminal is connected to a filter capacitor. The input terminal of the three-phase current detection chip is connected to the power supply, and the output terminal is connected to the third current amplifier chip. The control terminal is connected to the input terminal of the sampling resistor. The control terminal of the sampling resistor is connected to the MCU control chip (1), and the control terminal is connected to the relay control circuit. The input terminal of the relay control circuit is connected to the power supply, and the control terminal is connected to the collector of the first transistor. The emitter of the first transistor is grounded, and the base is connected to the MCU control chip (1). The output terminal of the relay control circuit is connected to the AC output interface.

4. The precise control energy storage system according to claim 1, characterized in that, It also includes a DC output circuit, which comprises a three-phase power interface circuit, a rectifier bridge circuit, a rectifier chip, a power controller chip, and a current protection circuit. The three-phase power interface circuit is connected to the input terminal of the rectifier bridge circuit, the output terminal of the rectifier bridge circuit is connected to the input terminal of the rectifier chip, the output terminal of the rectifier chip is connected to the input terminal of the power controller chip, the output terminal of the power controller chip is connected to an optocoupler, and the control terminal of the power controller chip is connected to the current protection circuit.

5. The precise control energy storage system according to claim 1, characterized in that, It also includes peripheral circuits, which include a display control circuit, a data management circuit, and a voltage regulator circuit. The display control circuit includes an LCD touch screen, a second transistor, and a touch driver chip. The input terminal of the LCD touch screen is connected to the power supply, the output terminal is connected to the input terminal of the touch driver chip, and the control terminal is connected to the collector of the second transistor. The emitter of the second transistor is grounded, and the base is connected to the MCU control chip (1). The input terminal of the touch driver chip is connected to the power supply, and the control terminal is connected to the MCU control chip (1).

6. The precise control energy storage system according to claim 5, characterized in that, The data management circuit includes a data communication circuit and a data storage circuit. The data communication circuit includes an Ethernet circuit, a CAN communication circuit, and a 485 communication circuit. The Ethernet circuit includes an Ethernet chip, a USB interface circuit, and a second crystal oscillator. The input terminal of the Ethernet chip is connected to a power supply, the output terminal is connected to the USB interface circuit, the signal terminal is connected to the second crystal oscillator, and the control terminal is connected to the MCU control chip (1). The CAN communication circuit includes a CAN communication chip and a CAN communication interface. The input terminal of the CAN communication chip is connected to a power supply, the output terminal is connected to the CAN communication interface, and the control terminal is connected to the MCU control chip (1). The 485 communication circuit includes a 485 communication chip and a 485 communication interface. The input terminal of the 485 communication chip is connected to a power supply, the output terminal is connected to the 485 communication interface, and the control terminal is connected to the MCU control chip (1). The data storage circuit includes a flash memory chip. The input terminal of the flash memory chip is connected to a power supply, and the output terminal is connected to the MCU control chip (1).

7. The precise control energy storage system according to claim 6, characterized in that, It also includes a voltage regulator circuit, which comprises four voltage regulator chips. The first voltage regulator chip has its input terminal connected to a 5V power supply and its output terminal connected to a 3.3V power supply. The second voltage regulator chip has its input terminal connected to a 12V power supply and its output terminal connected to a 5V power supply. The third voltage regulator chip has its input terminal connected to a battery power supply and its output terminal connected to a 5V power supply. The fourth voltage regulator chip has its input terminal connected to a 3.3V power supply and its output terminal connected to a 1.8V power supply.

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