Remote monitoring direct current optical storage controller

Abstract

The utility model discloses a remote monitoring direct current optical storage controller, and particularly relates to the technical field of optical storage charge and discharge management, which comprises a control unit part, a charge and discharge management part, a mains supply supplement part, a 4G remote communication part and a fault code display part, the charging and discharging management circuit is connected with the control chip through a high-power field effect transistor and a triode, the control unit is connected with the commercial power supplement part, the main chip reads a commercial power detection signal to control switching of the commercial power supplement circuit, storage battery power supply is switched to commercial power supply, and the control unit is connected with the fault code display part. And the main chip is directly connected with an LED nixie tube. According to the utility model, management information is fed back to the ATmega64A main chip through management of charging and discharging of the storage battery and the load, and the chip transmits the information to a background system through an M8321 system of the 4G module, so that the background can timely grasp state information of the load and the storage battery by the controller.

Description

Technical Field

[0001] This utility model relates to the field of photovoltaic energy storage charging and discharging management technology, and more specifically, to a remote monitoring DC photovoltaic energy storage controller. Background Technology

[0002] With increasing environmental awareness and growing resource scarcity, the use of new energy sources has rapidly entered people's lives. Photovoltaic energy storage power supply equipment uses sunlight as its energy source, charging during the day and continuing to be used at night. It does not require the laying of complex and expensive pipelines, is safe, energy-saving, and pollution-free. The charging and power supply process uses automatic switching, requiring no manual operation. It is stable and reliable, saves electricity costs, and requires no maintenance. Its practicality has been recognized by people.

[0003] Current DC photovoltaic energy storage controllers lack remote communication interfaces and AC power supplementation interfaces, resulting in certain design flaws and inconvenience in use. Utility Model Content

[0004] In order to overcome the above-mentioned defects of the prior art, the present invention provides a remote monitoring DC photovoltaic energy storage controller, which aims to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a remote monitoring DC photovoltaic energy storage controller, comprising a control unit, a charging / discharging management unit, a mains power replenishment unit, a 4G remote communication unit, and a fault code display unit. The charging / discharging management unit is connected to the control unit and is connected to the control chip via a high-power MOSFET and a transistor. The control unit is connected to the mains power replenishment unit, and the main chip controls the switching of the mains power replenishment unit from battery power to mains power by reading a mains power detection signal. The control unit is connected to the fault code display unit, and the main chip is directly connected to an LED digital tube to display fault codes according to the fault conditions.

[0006] Furthermore, the control unit establishes an MQTT or TCP protocol with a remote server via a 4G remote communication unit to send on-site computer data to the remote server.

[0007] Furthermore, the charge and discharge management section uses a high-power MOSFET of model IRF3205. The switching command of the high-power MOSFET is output by the ATmega64A main chip through the cooperation of Zener diodes BZG03C16, BZT52B18-V, BZT52C12-V and transistors 9015 and 9012.

[0008] Furthermore, the MCU chip adopts the ATmega64A main chip in TQFP64A package, an 8-bit AVR microprocessor, RISC structure, two 8-bit timers / counters with independent prescalers and comparators, a real-time counter (RTC) with an independent oscillator, two 8-bit PWM channels, eight single-ended channels, a programmable serial USART, and 53 programmable I / O ports.

[0009] Furthermore, the mains power supplement section uses a high-power MOSFET of model IRF3205, and the switching command of the high-power MOSFET is output by the ATmega64A main chip through diode BZT52B18-V, diode 1N4148 and transistor 9013.

[0010] Furthermore, the fault code display section is connected to the ATmega64A main chip via a 7-segment LED digital display, and displays the corresponding code according to different faults.

[0011] In this solution, the control unit establishes an MQTT or TCP protocol with a remote server via a 4G remote communication unit to send data from the field computer to the remote server. The M8321 module of the 4G remote communication unit is an LTE Cat4 module launched by China Mobile. The M8321 module supports TD-LTE / FDD-LTE / WCDMA / TDSCDMA / GSM communication standards, and the M8321-D supports TD-LTE / GSM communication standards, using an LCC+LGA packaging method.

[0012] This solution is a remote monitoring DC photovoltaic energy storage controller device. The beneficial effects achieved by this utility model using the above solution are as follows:

[0013] 1. The device operation information data transmission of this utility model is real-time, and can collect data in real time. The data transmission rate is high, and it only takes a few seconds from data collection to uploading to the remote server. Moreover, the data transmission accuracy is high and it can be free from interference from complex on-site environments.

[0014] 2. This utility model adopts the 4G network transmission method. The location of different power station collection points is not limited by the area. Relying on the signal coverage of China Mobile, no matter how far apart the power station collection points are, data can be collected and reported through the 4G mobile network signal.

[0015] 3. After the equipment operation data of this utility model is uniformly uploaded to the remote server, the platform system can perform big data analysis, provide more accurate operation information, and remotely control the equipment according to different requirements.

[0016] 4. This utility model facilitates maintenance personnel in accurately locating the equipment to be repaired, and can extract and prepare maintenance parts based on the system's pre-diagnostic information, thereby improving maintenance efficiency and reducing maintenance costs. It also has a fault code display function, which makes it easier for on-site maintenance personnel to diagnose equipment faults.

[0017] 5. This utility model has a mains power access function, which will further improve the stability of equipment operation when used in conjunction with mains power. Attached Figure Description

[0018] The structures, proportions, sizes, etc. illustrated in this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed herein, and are not intended to limit the implementation conditions of this utility model. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and objectives that this utility model can produce, should still fall within the scope of the technical content disclosed in this utility model.

[0019] Figure 1 A block diagram of the overall structure of a remote monitoring DC photovoltaic energy storage controller device provided in this solution;

[0020] Figure 2 This is the schematic diagram of the control unit section;

[0021] Figure 3 This is a schematic diagram of the charging management section.

[0022] Figure 4 This is a schematic diagram of the discharge management section;

[0023] Figure 5 Schematic diagram of the supplementary power supply section;

[0024] Figure 6 This is a schematic diagram of the fault code display section;

[0025] Figure 7 This is a schematic diagram of the 4G remote communication part. Detailed Implementation

[0026] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0027] Refer to the instruction manual appendix Figure 1-6This embodiment of a remote monitoring DC photovoltaic energy storage controller includes a control unit, a charge / discharge management unit, a mains power replenishment unit, a 4G remote communication unit, and a fault code display unit. The charge / discharge management unit is connected to the control unit and is connected to the control chip via a high-power MOSFET and a transistor. The control unit is connected to the mains power replenishment unit, and the main chip reads a mains power detection signal to control the switching of the mains power replenishment unit from battery power to mains power. The control unit is connected to the fault code display unit, and the main chip is directly connected to an LED digital tube to display fault codes according to the fault conditions.

[0028] The MCU chip uses the ATmega64A main chip in a TQFP64A package, an 8-bit AVR microprocessor, a RISC structure, two 8-bit timers / counters with independent prescalers and comparators, a real-time counter (RTC) with an independent oscillator, two 8-bit PWM channels, eight single-ended channels, a programmable serial USART, and 53 programmable I / O ports.

[0029] The PA0-PA3 ports connect to the photovoltaic module, battery, load, and mains power status indicator signals. PA3 controls the mains power supply channel, using a high-power IRF3205 MOSFET in conjunction with a Zener diode BZT52B18-V, a 1N4148 diode, and a 9013 transistor. PB0 and PB4 control the load output and load unlocking. PB5 and PB6 control the photovoltaic charging PWM output, adjusting the charging duty cycle according to different states. PC0-PC7 connect to a digital display, showing fault codes based on different faults. PD0 connects to the load protection circuit; if the current surge is too large, hardware protection is activated, interrupting the CPU. PD2 and PD3 connect to the 4G remote communication section. The M8321 module with 4G transmission, after connecting to the 5V power output from the IM1253B voltage regulator module, connects its communication interface to the PD2 and PD3 ports of the ATmega64A main chip. Ports PF0-PF3 are AD acquisition ports, representing charging voltage detection, solar panel voltage difference detection, load current sampling and overcurrent detection, and mains power detection, respectively. Ports PF4-PF7 are programming ports.

[0030] The charge and discharge management section uses a high-power MOSFET of model IRF3205. The switching command of the high-power MOSFET is output by the ATmega64A main chip through the Zener diodes BZG03C16, BZT52B18-V, BZT52C12-V and transistors 9015 and 9012.

[0031] The mains power supplement section uses a high-power MOSFET, model IRF3205. The switching command for the high-power MOSFET is output by the ATmega64A main chip through diode BZT52B18-V, diode 1N4148, and transistor 9013. This circuit is simple, reliable, and inexpensive.

[0032] Each fault is displayed via a digital tube. Digital tube displays are simpler, more reliable, more accurate, and consume less power.

[0033] In this solution, the monitoring host establishes an MQTT or TCP protocol with the 4G remote communication unit and the remote server via a wireless LAN to send data from the on-site computer to the remote server. The M8321 module of the 4G remote communication unit is an LTE Cat4 module launched by China Mobile. The M8321 module supports TD-LTE / FDD-LTE / WCDMA / TDSCDMA / GSM communication standards, and the M8321-D supports TD-LTE / GSM communication standards, using LCC+LGA packaging.

[0034] The usage method of this embodiment is as follows:

[0035] The controller first checks whether it is connected to mains power. If it is connected to mains power, the power supply is provided by the mains power. If it is not connected to mains power, the power supply is provided by the battery.

[0036] If the power supply is provided by a battery, the photovoltaic module manages the battery's charging using PWM (Pulse Width Modulation) via its charge / discharge management section. When the voltage is below the feed voltage (11.2V), it stops discharging to the load and performs a forced charge on the battery, with a PWM charging duty cycle of 100%. When the voltage is above the feed voltage (11.2V) but below the charging voltage (13.7V), it allows discharging to the load and performs equalization charging on the battery, with a PWM charging duty cycle of 50%. When the voltage is above the full charge voltage (14.4V), it performs float charging on the battery, with a PWM charging duty cycle of 10%, and allows continued discharging to the load. Simultaneously, this information is fed back to the ATmega64A main chip, which transmits it to the backend system via the M8321 module in the 4G remote communication section, allowing the backend to promptly monitor the controller's management information regarding the load and battery.

[0037] If a device malfunctions, the corresponding fault code will be displayed. Fault code 0 indicates no fault; fault code 1 indicates battery depletion; fault code 2 indicates overcurrent protection; fault code 3 indicates load malfunction; fault code 4 indicates insufficient mains voltage; fault code 5 indicates excessively high mains voltage; fault code 6 indicates remote communication failure; fault code 7 indicates charging circuit damage; fault code 8 indicates charging circuit malfunction; fault code 9 indicates discharging circuit malfunction; no fault code display indicates a damaged digital display or CPU malfunction. If multiple faults occur simultaneously, one fault code will be displayed every 3 seconds.

[0038] All contents not described in detail in the specification are existing technologies known to those skilled in the art, and the model parameters of each electrical appliance are not specifically limited and can be determined using conventional equipment. Electrical control components not mentioned in this technical solution are not shown in the figures because they are existing technologies, and will not be described here.

[0039] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A remote monitoring DC photovoltaic energy storage controller, characterized in that: It includes a control unit, a charging / discharging management unit, a mains power replenishment unit, a 4G remote communication unit, and a fault code display unit. The charging / discharging management unit is connected to the control unit and is connected to the control chip via a high-power MOSFET and a transistor. The control unit is connected to the mains power replenishment unit. The main chip reads a mains power detection signal to control the switching of the mains power replenishment unit, switching from battery power to mains power. The control unit is connected to the fault code display unit. The main chip is directly connected to an LED digital tube to display fault codes according to the fault conditions.

2. The remote monitoring DC photovoltaic energy storage controller according to claim 1, characterized in that: The control unit establishes an MQTT or TCP protocol with a remote server via a 4G remote communication unit to send on-site computer data to the remote server.

3. The remote monitoring DC photovoltaic energy storage controller according to claim 1, characterized in that: The charge and discharge management section uses a high-power MOSFET of model IRF3205. The switching command of the high-power MOSFET is output by the ATmega64A main chip through the Zener diodes BZG03C16, BZT52B18-V, BZT52C12-V and transistors 9015 and 9012.

4. The remote monitoring DC photovoltaic energy storage controller according to claim 1, characterized in that: The MCU chip uses the ATmega64A main chip in a TQFP64A package, an 8-bit AVR microprocessor, a RISC structure, two 8-bit timers / counters with independent prescalers and comparators, a real-time counter (RTC) with an independent oscillator, two 8-bit PWM channels, eight single-ended channels, a programmable serial USART, and 53 programmable I / O ports.

5. The remote monitoring DC photovoltaic energy storage controller according to claim 1, characterized in that: The mains power supplement section uses a high-power MOSFET of model IRF3205. The switching command of the high-power MOSFET is output by the ATmega64A main chip through diode BZT52B18-V, diode 1N4148 and transistor 9013.

6. The remote monitoring DC photovoltaic energy storage controller according to claim 1, characterized in that: The fault code display section is connected to the ATmega64A main chip via a 7-segment LED digital display, and displays the corresponding code according to different faults.

Images