CN219227268U

CN219227268U - STM 32-based real-time positioning solar mobile power supply

Info

Publication number: CN219227268U
Application number: CN202222410633.2U
Authority: CN
Inventors: 游国栋; 寇亚琪; 沈治方; 贾珺然; 仝政川
Original assignee: Tianjin University of Science and Technology
Current assignee: Tianjin University of Science and Technology
Priority date: 2022-09-16
Filing date: 2022-09-16
Publication date: 2023-06-20
Anticipated expiration: 2032-09-16

Abstract

The utility model discloses a real-time positioning solar mobile power supply based on STM32, which comprises a portable mobile power supply box and a flexible photovoltaic panel, wherein the portable mobile power supply box comprises: the system comprises a charging circuit, a storage battery, an STM32 main control module, a photovoltaic parameter acquisition circuit, a storage battery parameter acquisition circuit, a driving module, a GPS module, a GSM module and an auxiliary circuit; the flexible photovoltaic panel is connected with the storage battery through the charging circuit; the STM32 main control module is respectively connected with the photovoltaic parameter acquisition circuit, the storage battery parameter acquisition circuit, the driving module, the GPS module, the GSM module and the auxiliary circuit; the utility model uses the maximum power tracking algorithm, improves the photoelectric conversion efficiency of solar energy, realizes the charge and discharge control of the storage battery, and ensures the use safety and service life of the storage battery; the GPS module and the GSM module are used for solving the problems of user position information determination and remote emergency call in extreme scenes, so that the functions are more perfect.

Description

STM 32-based real-time positioning solar mobile power supply

Technical Field

The utility model relates to the technical field of mobile power supplies, in particular to a STM 32-based real-time positioning solar mobile power supply.

Background

With the silenced rising of outdoor exercises such as mountain climbing, riding, camping, self-driving off-road, outdoor exploration, the demands of people on outdoor safety equipment are increasing. The portable power source is used as a portable charger or a backup battery of an electronic product, and is particularly applied to occasions without commercial power supply. The solar mobile power supply in the prior art is unstable in power generation, low in energy utilization rate and low in charging speed. In addition, considering the complex outdoor scene of mobile power supply application, when facing the loss or damage of communication equipment, the determination of positioning information and remote emergency call can not be realized in time.

Disclosure of Invention

The present utility model is directed to solving the problems set forth in the background art above. A STM 32-based real-time positioning solar mobile power supply is provided.

The utility model aims to solve the technical problems that the solar photoelectric conversion efficiency is improved by collecting real-time voltage and current parameters of the flexible photovoltaic panel and using a maximum power tracking algorithm; the charge and discharge control of the storage battery is realized by collecting the real-time voltage and current parameters of the storage battery.

The utility model solves the technical problems of determining the position information of the user and remotely calling for help in extreme scenes through the GPS module and the GSM module so as to rapidly process an emergency plan, provide support or help and enable the functions to be more perfect.

In order to achieve the technical purpose, the utility model adopts the following technical scheme:

STM 32-based real-time positioning solar mobile power supply, which is characterized by comprising a portable mobile power supply box and a flexible photovoltaic panel, wherein the portable mobile power supply box comprises: the system comprises a charging circuit, a storage battery, an STM32 main control module, a photovoltaic parameter acquisition circuit, a storage battery parameter acquisition circuit, a driving module, a GPS module, a GSM module and an auxiliary circuit; wherein the flexible photovoltaic panel is connected with the storage battery through the charging circuit; and the STM32 main control module is respectively connected with the photovoltaic parameter acquisition circuit, the storage battery parameter acquisition circuit, the driving module, the GPS module, the GSM module and the auxiliary circuit.

Furthermore, the charging circuit adopts a synchronous rectification BUCK circuit, a MOSFET with low switching loss and high switching speed is utilized to replace a rectifying diode with high voltage drop, and two MOSFET power switching tubes jointly carry out synchronous rectification work in an inductive current continuous working mode, so that loss is reduced, and circuit efficiency is improved.

Furthermore, the storage battery adopts a 12V lithium battery, and the lithium battery has the advantages of light weight, high charging efficiency and long service life.

Furthermore, the flexible photovoltaic panel adopts a flexible thin film solar panel, so that the volume is small, the weight is light, and the portability is greatly improved.

Furthermore, the STM32 main control module chip adopts STM32F103RCT6, has high performance and low power consumption, has built-in A/D conversion function, does not need to be additionally provided with other A/D conversion circuit modules, and optimizes the circuit structure.

Further, the photovoltaic parameter acquisition circuit comprises a photovoltaic voltage acquisition module and a photovoltaic current acquisition module; the storage battery parameter acquisition circuit comprises a storage battery voltage acquisition module, a storage battery current acquisition module and an electric quantity detection module. The photovoltaic voltage acquisition module and the storage battery voltage acquisition module are designed by adopting a precise resistor voltage division principle; the photovoltaic current acquisition module and the storage battery current acquisition module adopt a Hall type current sensor ACS712, an accurate low-bias linear Hall sensor circuit is arranged in the device, and real-time current of the photovoltaic and the storage battery can be accurately acquired; the electric quantity detection module adopts an intelligent electric quantity detection chip DS2780, and the chip is provided with a register and can detect the residual electric quantity condition of the storage battery in a single bus mode.

Furthermore, the driving module adopts a half-bridge driving integrated chip IR2304 to amplify the low-level signal output by the STM32 main control module and then output a PWM pulse signal capable of controlling the MOSFET. The chip is internally integrated with mutually independent control drive output circuits, can directly drive two power semiconductor devices MOSFET, and has the advantages of quick dynamic response, strong driving capability and high working frequency.

Furthermore, the GPS module adopts a GPS/Beidou dual-mode positioning module, combines the GPS and the Beidou, simultaneously performs positioning, and enables 22 satellites to participate in position analysis and calculation, so that the accuracy of a positioning system is better.

Furthermore, the GSM module adopts the SIM900A module, and can send information in the form of AT instructions to a specific user side which is set in advance only by inserting a mobile card.

Further, the auxiliary circuit comprises a power supply module, a display module and a key module;

compared with the prior art, the utility model has the following advantages:

1) And by adopting a high-performance and high-precision STM32 chip, real-time voltage and current parameters of the flexible photovoltaic panel and the storage battery are acquired and processed, and the maximum power tracking algorithm is used, so that the photoelectric conversion efficiency of solar energy is effectively improved, and meanwhile, the charge and discharge control of the storage battery is realized.

2) The GPS module and the GSM module are used for determining the position information of the user and remotely calling for help in extreme scenes so as to rapidly process an emergency plan, provide support or help and enable functions to be more perfect.

Drawings

For a clearer description of the technical solutions of embodiments of the present utility model, the drawings that are needed in the embodiments and technical descriptions will be briefly introduced below, it being obvious that the drawings in the following description are only some embodiments of the present utility model, and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a connection block diagram of the present utility model;

FIG. 2 is a photovoltaic voltage acquisition module and battery voltage acquisition module circuit of the present utility model;

FIG. 3 is a photovoltaic current collection module and battery current collection module circuit of the present utility model;

FIG. 4 is a schematic diagram of a power detection module circuit of the present utility model;

FIG. 5 is a drive module circuit of the present utility model;

FIG. 6 is a GPS module circuit of the present utility model;

FIG. 7 is a GSM module circuit of the present utility model;

FIG. 8 is a power module circuit of the present utility model;

Detailed Description

In order to more clearly illustrate the technical solutions and advantages of the embodiments of the present utility model, the preferred embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments.

As shown in fig. 1, this embodiment provides a real-time positioning solar mobile power supply based on STM32, which is characterized by including portable mobile power supply box and flexible photovoltaic board, portable mobile power supply box includes: the system comprises a charging circuit, a storage battery, an STM32 main control module, a photovoltaic parameter acquisition circuit, a storage battery parameter acquisition circuit, a driving module, a GPS module, a GSM module and an auxiliary circuit; wherein the flexible photovoltaic panel is connected with the storage battery through the charging circuit; and the STM32 main control module is respectively connected with the photovoltaic parameter acquisition circuit, the storage battery parameter acquisition circuit, the driving module, the GPS module, the GSM module and the auxiliary circuit.

The photovoltaic parameter acquisition circuit comprises a photovoltaic voltage acquisition module and a photovoltaic current acquisition module; the storage battery parameter acquisition circuit comprises a storage battery voltage acquisition module, a storage battery current acquisition module and an electric quantity detection module.

Further, as shown in fig. 2, a photovoltaic voltage acquisition module and a storage battery voltage acquisition module are designed according to a voltage division principle by utilizing a precision resistor, wherein the voltage acquisition module comprises a resistor R1, a resistor R2, a resistor R3, a resistor R4 and a capacitor C1, real-time voltage of a flexible photovoltaic panel and a storage battery is converted into a voltage domain below 3.3V which can be tolerated by a GPIO port of an STM32 main control module, and then the voltage value is input to an ADC analog-digital conversion port of the STM32 main control module;

further, as shown in fig. 3, a hall current sensor ACS712 is used to design a photovoltaic current collection module and a battery current collection module, and an accurate low-bias linear hall sensor circuit is built in the chip, so that real-time current of the photovoltaic and the battery can be accurately collected, and then a current value is input to an ADC analog-digital conversion port of the STM32 main control module;

further, as shown in fig. 4, the electric quantity detection module adopts an intelligent electric quantity detection chip DS2780, the chip is provided with a register, and can detect the residual electric quantity condition of the storage battery in a single bus mode and send the residual electric quantity condition to the STM32 main control module, and the STM32 main control module is used for displaying real-time electric quantity information through the display module.

The charging circuit adopts a synchronous rectification BUCK circuit, two MOSFET switching tubes jointly conduct synchronous rectification work in an inductive current continuous working mode, one switching tube of the BUCK circuit is used as a freewheeling diode, and the MOSFET switching with low switching loss and high switching speed is utilized to replace a rectifying diode with high voltage drop, so that loss is reduced, and the improvement of the efficiency of the BUCK circuit is realized.

The charging circuit is the main circuit for realizing maximum power tracking. The output characteristic of the photovoltaic power generation has strong nonlinearity, and under the condition of the same temperature, the stronger the illumination is, the higher the short-circuit current is, and the larger the available power is; and under the same illumination, the higher the temperature is, the lower the open circuit voltage is, and the lower the power which can be provided is. Solar energy utilization can be maximized only by maintaining the output at the maximum power point. Therefore, in a certain working environment, the continuous working at the maximum power point needs to be controlled by taking manual measures.

Further, the STM32 main control module collects voltage and current parameters of the flexible photovoltaic panel in real time to carry out maximum power tracking algorithm calculation, generates two paths of complementary PWM pulse control signals with adjustable pulse width, and controls the on and off of two MOSFET switching tubes in the synchronous rectification BUCK circuit after the complementary PWM pulse control signals are amplified by the driving module, so that the aim of controlling the output power of the photovoltaic system to be maximum is achieved. The STM32 main control module continuously tracks the maximum power point and corrects the maximum power point in real time by continuously adjusting the duty ratio of the complementary PWM pulse control signal, so that the tracking of the maximum power point is realized, and the purposes of improving the use efficiency and the reliability of solar energy are achieved;

furthermore, the STM32 main control module is used for controlling the current optimal working point of the charging and discharging of the storage battery by collecting the real-time voltage and current parameter information of the storage battery, and the storage battery is in an overcharged state when the voltage of the storage battery exceeds the cutoff voltage of the storage battery. However, the long-time overcharging state can cause the safety problems of swelling, even ignition and the like of the storage battery. The overcharge voltage limiting value Umax and the overdischarge voltage limiting value Umin of the storage battery are set in advance, and the use safety and the service life of the battery are guaranteed.

As shown in FIG. 5, because the PWM pulse signal output by the GPIO port of the STM32 main control module has limited driving capability, the driving of the MOSFET switch tube can be completed after the low-voltage PWM pulse signal is amplified, and therefore, a driving module is added between the STM32 main control module and the BUCK circuit to realize the control of the STM32 main control module on the synchronous rectification BUCK circuit. The driving module adopts a half-bridge driving integrated chip IR2304, two mutually independent control driving output circuits are integrated in the chip, and the driving module can directly drive the complementary output of MOSFET switching tubes of two power semiconductor devices, and has the advantages of quick dynamic response, strong driving capability and high working frequency.

As shown in fig. 6, the GPS module adopts a GPS/beidou dual-mode positioning module, which combines GPS and beidou, and simultaneously performs positioning, 22 satellites participate in position analysis and calculation, and the accuracy of the positioning system is better. Firstly, a satellite sends position information to a GPS/Beidou dual-mode positioning module through an NMEA0183 data protocol, the position information is decoded through frequency conversion and signal demodulation, then the current position information is stored in a memory, and finally the memory transmits data to the STM32 main control module through USART serial port communication established between the GPS/Beidou dual-mode positioning module and the STM32 main control module, so that the extraction of positioning data is completed, and the current geographic position information such as longitude and latitude, altitude, current time and the like can be obtained.

As shown in fig. 7, the GSM module adopts a SIM900A module, which does not need to consider the distance problem, and can send the position information obtained by the GPS/beidou dual-mode positioning module to a specific user side set in advance through a GPRS network only by plugging in a mobile card, which is fast and convenient. The GSM module needs to be connected with a 5V direct current power supply, a USART serial port communication mode is adopted to establish connection with the STM32 main control module, when a user sends an instruction to the STM32 main control module through the key module, the system rapidly calls specific data such as current longitude and latitude, altitude, current time and the like obtained by the GPS/Beidou dual-mode positioning module and packages the specific data together, the SIM900A module sends information in the form of AT instruction to a mobile phone number of a specific user terminal which is set in advance, the specific user terminal indicates that a solar mobile power supply user encounters potential safety hazards, so that the specific user terminal can rapidly provide support or help after receiving accurate position information, and emergency plan processing is carried out.

The auxiliary circuit comprises a power supply module, a display module and a key module.

Further, as shown in fig. 8, the power supply module is constituted by a buck switching regulator chip JW5015 and a linear regulator chip SPX5205 and their respective peripheral circuits. The power supply module provides different working voltages for each hardware circuit module, and each hardware circuit module of the utility model needs three different working voltages: 5V, 3.3V, 12V. The working voltage of the electric quantity detection module, the photovoltaic current acquisition module, the storage battery current acquisition module, the GPS module and the GSM module is 5V, and the 12V direct current output of the lithium battery is converted into 5V by a step-down type switching regulator JW5015 chip to supply power. The working voltage of the STM32 main control module, the display module and the key module is 3.3V, and the linear voltage stabilizer SPX5205 chip converts 5V into 3.3V for power supply. The operating voltage of the driving module IR2304 chip is 12V, and power is supplied by the 12V direct current output of the lithium battery.

Furthermore, the display module adopts a 4-needle 0.96-inch OLED display screen module, the size is small, the use is convenient, and the DC-DC booster circuit is integrated in the module, so that the module can work normally only by providing a 3.3V power supply;

further, the key module is a triggering condition of emergency call, in this embodiment, a mode of pressing the key for five seconds for a long time is adopted to trigger the STM32 main control module to immediately send an instruction of emergency call information, so as to complete emergency call operation.

The utility model uses the maximum power tracking algorithm to improve the photoelectric conversion efficiency of solar energy and realize the charge and discharge control of the storage battery; the GPS module and the GSM module are used for solving the problems of user position information determination and remote emergency call in extreme scenes so as to rapidly process emergency plans, provide support or help and enable functions to be more perfect.

The foregoing describes the embodiments of the present utility model in detail, but the description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. It should be noted that any modification, equivalent substitution, improvement, etc. made within the scope of the present utility model should be included in the scope of protection of the present utility model.

Claims

1. STM 32-based real-time positioning solar mobile power supply, which is characterized by comprising a portable mobile power supply box and a flexible photovoltaic panel, wherein the portable mobile power supply box comprises: the system comprises a charging circuit, a storage battery, an STM32 main control module, a photovoltaic parameter acquisition circuit, a storage battery parameter acquisition circuit, a driving module, a GPS module, a GSM module and an auxiliary circuit; wherein the flexible photovoltaic panel is connected with the storage battery through the charging circuit; and the STM32 main control module is respectively connected with the photovoltaic parameter acquisition circuit, the storage battery parameter acquisition circuit, the driving module, the GPS module, the GSM module and the auxiliary circuit.

2. The STM 32-based real-time positioning solar mobile power supply is characterized in that the charging circuit adopts a synchronous rectification BUCK circuit, and MOSFET (metal oxide semiconductor field effect transistor) switching tubes with low turn-on loss and high switching speed are utilized to replace rectifier diodes with high voltage drop, so that the two MOSFET power switching tubes jointly perform synchronous rectification work in an inductive current continuous working mode.

3. The STM 32-based real-time positioning solar mobile power supply of claim 1, wherein the storage battery is a 12V lithium battery.

4. The STM 32-based real-time positioning solar mobile power supply according to claim 1, wherein STM32 master control module chip selection adopts STM32F103RCT6.

5. The STM 32-based real-time positioning solar mobile power supply according to claim 1, wherein the photovoltaic parameter acquisition circuit comprises a photovoltaic voltage acquisition module and a photovoltaic current acquisition module; the storage battery parameter acquisition circuit comprises a storage battery voltage acquisition module, a storage battery current acquisition module and an electric quantity detection module.

6. The STM 32-based real-time positioning solar mobile power supply according to claim 5, wherein the photovoltaic voltage acquisition module and the storage battery voltage acquisition module are designed by adopting a precise resistor voltage division principle; the photovoltaic current acquisition module and the storage battery current acquisition module adopt a Hall type current sensor ACS712; the electric quantity detection module adopts an intelligent electric quantity detection chip DS2780.

7. The STM 32-based real-time positioning solar mobile power supply is characterized in that the driving module adopts a half-bridge driving integrated chip IR2304, amplifies a low-voltage PWM pulse signal output by a STM32 main control module and outputs a high-voltage PWM pulse signal capable of controlling a MOSFET switch tube.

8. The STM 32-based real-time positioning solar mobile power supply of claim 1, wherein the GPS module employs a GPS/beidou dual-mode positioning module.

9. An STM32 based real time location solar mobile power supply according to claim 1 wherein the GSM module employs a SIM900A module.

10. The STM 32-based real-time positioning solar mobile power supply according to claim 1, wherein the auxiliary circuit comprises a power supply module, a display module and a key module, and the power supply module provides different working voltages for each hardware circuit module; the display module displays real-time electric quantity information by adopting a 4-needle 0.96-inch OLED display screen module; the key module is a triggering condition for realizing emergency call.