CN217115711U

CN217115711U - Power supply board with four-way load output for solar charging

Info

Publication number: CN217115711U
Application number: CN202220256376.9U
Authority: CN
Inventors: 张树琪; 张海松; 曾伟群
Original assignee: Zhuhai Jinrui Electric Power Technology Co ltd
Current assignee: Zhuhai Jinrui Electric Power Technology Co ltd
Priority date: 2022-02-08
Filing date: 2022-02-08
Publication date: 2022-08-02
Anticipated expiration: 2032-02-08

Abstract

The utility model provides a power supply board that is used for solar charging to have four ways load output, including the solar panel module, thunderbolt surge protection module, first resistance voltage-dividing network module, first four-wire high accuracy current sampling resistance module, solar charging management module, second resistance voltage-dividing network module, second to fifth four-wire high accuracy current sampling resistance module, difference fortune is put and is flowed monitoring protection module, first PMOSFET module, second PMOSFET module, third PMOSFET module, fourth PMOSFET module, fifth PMOSFET module, logic or gate module, the MCU module of taking the ADC function, 5G/4G module, temperature and humidity sensor module, backstage server module and battery module, first load module, second load module, third load module, fourth load module. The utility model discloses the sampling precision reaches 0.1mA, and response time reaches 1uS, realizes the intelligent monitoring function of this system.

Description

Power supply board with four-way load output for solar charging

Technical Field

The utility model belongs to the technical field of battery charge-discharge management, especially, relate to a power supply board device that has four ways load output for solar charging.

Background

The existing equipment mainly powered by solar energy cannot monitor solar energy acquisition information and load working condition information in real time at the background. In addition, if the solar energy collecting device or the load has a fault, the fault load cannot be timely and effectively fed back at the background and actively cut off.

To address the above shortcomings, the present invention provides a new solution.

The utility model discloses can be at the operating mode of on-the-spot or long-range backstage real time monitoring solar equipment to collect and handle relevant data information, for the optimization or the deployment of relevant equipment provide data support, can initiatively cut off the load when the load breaks down, and can be in long-range in time discover the trouble of relevant subcomponent, provide the reference for the maintenance of equipment personnel.

The utility model discloses specific advantage:

1. the system has a remote communication function, and can monitor solar energy acquisition information and working condition information of the system in real time;

2. if the solar energy collecting device or the load has faults, the loads with the faults can be timely and effectively fed back at the background and can be actively cut off.

3. The current sampling precision is high, the overcurrent protection response is quick, the protection response time is less than 1uS, software intervention is not needed, and the load and the system can be protected very quickly;

4. lightning protection and surge impact protection, and can be suitable for field environment or complex electromagnetic environment.

Interpretation of terms:

A. MOSFET: the field effect transistor can be controlled to be switched on and off by voltage;

B. differential operational amplifier: the high impedance input can monitor a tiny voltage difference signal;

C. MCU: a microcontroller (Micro Control Unit);

D. ADC: analog to digital converter, Analog to digital converter;

E. MPPT: maximum Power Point Tracking (MPPT) capability by input Voltage adjustment Maximum Power Tracking conversion.

Disclosure of Invention

The embodiment of the utility model discloses following content:

a power supply board with four-way load output for solar charging, comprising: a solar panel module, a lightning surge protection module, a first resistance voltage division network module, a first four-wire high-precision current sampling resistance module, a solar charging management module, a second resistance voltage division network module, a second four-wire high-precision current sampling resistance module, a third four-wire high-precision current sampling resistance module, a fourth four-wire high-precision current sampling resistance module, a fifth four-wire high-precision current sampling resistance module, a differential operational amplifier and overcurrent monitoring protection module, a first PMOSFET module, a second PMOSFET module, a third PMOSFET module, a fourth PMOSFET module, a fifth PMOSFET module, a logic or gate module, an MCU module with ADC function, a 5G/4G module, a temperature and humidity sensor module, a background server module and a storage battery module, a first load module, a second load module, a third load module, a fourth load module, wherein:

the solar panel module is connected with one end of the lightning surge protection module, is connected with the other end of the resistance voltage division network module, and is connected to the solar charging management module through the first resistance voltage division network module;

the lightning surge protection module is connected with one end of the first four-wire high-precision current sampling resistor module, connected with one end of the second resistor voltage division network module and connected to the differential operational amplifier and overcurrent monitoring protection module through the second resistor voltage division network module;

one end of each of the first four-wire high-precision current sampling resistance module to the fifth four-wire high-precision current sampling resistance module is connected to the differential operational amplifier and overcurrent monitoring protection module, the other end of each of the first four-wire high-precision current sampling resistance module to the fifth four-wire high-precision current sampling resistance module is connected to the fifth PMOSFET module through the first PMOSFET module, and the storage battery module is connected to the fourth load module through the first load module;

one end of the MCU module with the ADC function is connected to the logic OR gate module, and the other end of the MCU module is connected to the 5G/4G module and the background server through RS 485;

one end of the temperature and humidity sensor module is connected to the MCU module with the ADC function.

Further, a preferred power supply board with four-way load output for solar charging is provided, and the solar panel module is used for realizing a photoelectric conversion function.

Further, a preferred power supply board with four-way load output for solar charging is provided, and the lightning surge protection module is used for realizing lightning surge protection.

Further, the preferred power supply board that has four ways load output for solar charging, first resistance voltage divider network, first four-wire high accuracy current sampling resistance module with solar charging management module three modules are used for converting solar panel's voltage into battery charging voltage, adopt the MPPT algorithm, realize 3 segmentation charges, wherein, solar charging management module power management chip preferably adopts BQ 24650.

Further, a preferred power supply board with four-way load output for solar charging is provided, and the second resistance voltage division network is used for sampling the solar panel voltage and the battery voltage.

Further, the preferred power supply board that has four ways load output for solar charging, first four-wire high accuracy current sampling resistance module, second resistance divider network module, second four-wire high accuracy current sampling resistance module, third four-wire high accuracy current sampling resistance module, fourth four-wire high accuracy current sampling resistance module, fifth four-wire high accuracy current sampling resistance module are used for taking a sample solar panel current together, the battery current and first load module extremely fourth load module current.

Further, the preferred solar charging power supply board with four-way load output is characterized in that the differential operational amplifier and the overcurrent monitoring protection module are used for amplifying sampled solar panel voltage and battery voltage, solar panel current, battery current and small analog signals of the currents from the first load module to the fourth load module, meanwhile, the overcurrent monitoring protection module adopts a comparator device to realize hardware-level overcurrent protection, and reports the abnormity of the corresponding module to the MCU.

Further, a preferred solar charging power supply board with four load outputs is provided, the logic or gate module is used for logic or function, and the MCU and the differential operational amplifier and overcurrent monitoring protection module can control the on/off of the battery module and the first to fourth load modules simultaneously;

the MCU module with the ADC function is used for a communication function, an analog-to-digital conversion function, an equipment operation environment temperature and humidity monitoring function and a voltage and current monitoring function, and when the working conditions of the load and the battery are abnormal, abnormal information is informed to a background, or the working state of the related load is controlled by cutting off a power supply according to the working condition requirement;

the temperature and humidity sensor module is used for acquiring temperature and humidity information of an equipment operating environment and informing the acquired temperature and humidity information to the MCU;

and the 5G/4G module is used for a wireless communication function and transmitting the relevant information of the equipment to the background server through a wireless signal.

Further, a preferred power supply board for solar charging with four-way load output adopts the MPPT algorithm to realize a 3-segment charging technology, wherein the charging efficiency of the 3-segment charging can reach 90% or more.

Further, a preferred power supply board for solar charging having four-way load output, all circuits are disposed on the whole circuit board or a separate circuit board.

According to the technical solution provided by the utility model, the embodiment of the utility model has the following advantage:

1. a differential operational amplifier and a four-wire high-precision current sampling resistor are used for performing a current sampling function, and the minimum sampling precision reaches 0.1 mA;

2. the overcurrent protection function is realized by using a comparator and a differential operational amplifier, and the overcurrent protection response time reaches 1 uS;

3. the MCU module with the ADC function realizes the intelligent monitoring function of the system;

4. the lightning and surge protection module realizes the lightning and surge protection of the system;

5. and the 4G/5G communication module and the background server realize the remote monitoring function of the system.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without inventive exercise.

Fig. 1 is a schematic diagram of a hardware structure provided in an embodiment of the present invention.

Fig. 2 is a schematic circuit diagram of the surge protection module 2 provided in the embodiment of the present invention.

Fig. 3 is a schematic circuit diagram of the solar charging management module 5 according to an embodiment of the present invention.

Fig. 4 is a schematic circuit diagram of a second resistance voltage divider network module 6 according to an embodiment of the present invention.

Fig. 5 is the embodiment of the utility model provides an use difference to amplify and four-wire high accuracy current sampling resistance does current sampling function circuit schematic diagram part.

Fig. 6 is a schematic circuit diagram of the MCU circuit module 18 with ADC sampling function provided in the embodiment of the present invention.

Fig. 7 is a schematic circuit diagram of the temperature and humidity monitoring module 26 provided in the embodiment of the present invention.

Fig. 8 is a schematic circuit diagram of the overcurrent monitoring protection module provided in the embodiment of the present invention.

Fig. 9 is a schematic diagram of a load module switch control circuit provided in an embodiment of the present invention.

Fig. 10 is a schematic circuit diagram of the 4G communication module 24 according to an embodiment of the present invention.

Fig. 11 is the MCU control module, the watchdog, the clock module circuit schematic diagram provided in the embodiment of the present invention.

Fig. 12 is a schematic circuit diagram of a 485 communication module provided in the embodiment of the present invention.

Fig. 13 is a schematic diagram of a 4-way load voltage control circuit provided in the embodiment of the present invention.

Fig. 14 is a schematic diagram of the analog switch module and the LDO circuit of the power chip provided in the embodiment of the present invention.

Fig. 15 is a schematic circuit diagram of the solar panel current signal amplifying module, the battery/charging current signal amplifying module, and the reference voltage module for differential operational amplifier provided in the embodiment of the present invention.

Fig. 16 is a schematic circuit diagram of a module for preventing current from flowing backward to a solar module and preventing over-discharge of a battery according to an embodiment of the present invention.

Fig. 17 is a schematic circuit diagram of a DC/DC module provided in an embodiment of the present invention.

Detailed Description

The present embodiment is described in detail with reference to fig. 1 to 17

As shown in the system block of FIG. 1, the whole system is composed of a solar panel module 1, a lightning surge protection module 2, a first resistive voltage division network module 3, a first four-wire high-precision current sampling resistance module 4, a solar charging management module 5, a second resistive voltage division network module 6, a second four-wire high-precision current sampling resistance module 7, a third four-wire high-precision current sampling resistance module 8, a fourth four-wire high-precision current sampling resistance module 9, a fifth four-wire high-precision current sampling resistance module 10, a differential operational amplifier and overcurrent monitoring protection module 11, a first PMOSFET module 12, a second PMOSFET module 13, a third PMOSFET module 14, a fourth PMOSFET module 15, a fifth PMOSFET module 16, a logic or gate module 17, an MCU module with ADC function 18, a 5G/4G module 24, a temperature and humidity sensor module 25, a background server module 26 and a storage battery module 19, the load module comprises a first load module 20, a second load module 21, a third load module 22 and a fourth load module 23.

1. Solar panel module 1

Mainly realizes the photoelectric conversion function.

2. Lightning surge protection module 2

The lightning surge protection is mainly realized, and the rear-stage circuit is protected from being damaged in thunderstorm weather or severe environments with high-power equipment around the lightning surge protection.

3. A first resistance voltage-dividing network 3, a first four-wire high-precision current sampling resistance module 4 and a solar charging management module 5

The three modules mainly convert the voltage of the solar panel into the charging voltage of the storage battery, so that the storage battery is protected to the maximum extent, the service life of the storage battery is prolonged, a 3-section type charging technology is realized by adopting an MPPT algorithm under the premise, and the charging efficiency can reach 90% or more.

4. Second resistor divider network 6

The solar panel voltage and the battery voltage are sampled.

5. A first four-wire high-precision current sampling resistor module 4, a second resistor voltage-dividing network module 6, a second four-wire high-precision current sampling resistor module 7, a third four-wire high-precision current sampling resistor module 8, a fourth four-wire high-precision current sampling resistor module 9, and a fifth four-wire high-precision current sampling resistor module 10

The modules are mainly used for sampling the solar panel current, the battery current and the module currents of the first load module 20, the second load module 21, the third load module 22 and the fourth load module 23.

6. Differential operational amplifier and overcurrent monitoring protection module 11

The sampling circuit mainly realizes the amplification of small analog signals of the sampled solar panel voltage and battery voltage, the solar panel current, the battery current, the first load module 20, the second load module 21, the third load module 22 and the fourth load module 23 module current, and meanwhile, the overcurrent monitoring protection module adopts a comparator device to realize the hardware-level overcurrent protection, and the overcurrent protection reaction time is microsecond level. When a short circuit or an abnormally large current occurs in the rear modules (e.g., the battery module 19, the first load module 20, the second load module 21, the third load module 22, and the fourth load module 23), the corresponding abnormal modules can be rapidly turned off, thereby protecting the entire system. And simultaneously, reporting the abnormity of the corresponding module to the MCU (18), wherein the MCU communicates with the 5G/4G module 24 through an industrial communication protocol RS485 so as to inform the abnormity to a background (module 26).

7. Logic or gate module 17

Mainly implementing logic or functions, the MCU (module 18) may control the switches of the battery module 19 and (the first load module 20, the second load module 21, the third load module 22, the fourth load module 23) to be turned off simultaneously with the module 11.

8. MCU module 18 with ADC function

The intelligent monitoring system mainly realizes the communication function, the conversion function from analog quantity to digital quantity, the temperature and humidity monitoring function of the equipment operation environment and the monitoring function of the solar panel, the battery and the load voltage and current; when the load and the battery have abnormal working conditions, informing the abnormal information to a background; or the working state of the related load is controlled by cutting off the power supply according to the working condition requirement.

9. Temperature and humidity sensor module 25

The temperature and humidity information acquisition function of the equipment operation environment is mainly realized, and the acquired temperature and humidity information is informed to the MCU (18).

10. 5G/4G module 24

The wireless communication function is mainly realized, the related information of the equipment is transmitted to the background through wireless signals, and an equipment user can remotely (if necessary, on site) monitor the equipment in real time and make a decision according to the related data.

The voltage dependent resistors RV1/RV3 and R45 form first-stage common mode protection, RV1, C51, T1, C29, R33/R34 and C33 form first-stage differential mode protection, and the voltage stabilizing diode D6 forms second-stage differential mode protection. The surge (impact) protection voltage of the protection module is more than 4kV and can exceed the corresponding GB/T17626.5-2008 highest level 4.

The main function of the NMOS Q2 is reverse solar power input protection. The principle is as follows: when the solar panel is positively connected, the voltage between GS of Q2 is larger than the threshold voltage, so that DS of Q2 is conducted, and a loop is formed with the solar panel; when the solar panels are reversely connected, namely: VCC _ Solar is positive voltage, VCC _ Solar is negative voltage or 0 voltage, at this time, the body diode of Q2 is cut off reversely, the GS voltage of Q2 is less than threshold voltage, DS of Q2 is not conducted, so that the whole circuit can not form a loop, and the purpose of reverse connection protection is achieved.

The main function is to convert the voltage of the solar panel into the voltage of the storage battery through the power management chip BQ24650, thereby realizing the charging of the storage battery. The module adopts an MPPT algorithm to realize a 3-section type charging technology, and the charging efficiency can reach 90% or above.

The main functions of the module are: the voltage of the solar panel and the voltage of the storage battery are sampled and followed through the voltage dividing resistor R58/R60, the operational amplifier U13, the operational amplifier R71/R75 and the operational amplifier U16 respectively, the signals are input to the single chip microcomputer with the ADC function, analog-to-digital conversion is achieved, and therefore the voltages of the solar panel and the storage battery are measured.

Fig. 5 is the embodiment of the utility model provides an use difference to operate to put and four-wire high accuracy current sampling resistance does current sampling function circuit schematic diagram.

The following description is combined with fig. 5 and fig. 6:

a differential operational amplifier and a four-wire high-precision current sampling resistor are used for performing a current sampling function, and the minimum sampling precision reaches 0.1 mA;

four-wire high-precision current sampling resistor R107/R126/R127/R128/R129 (precision 0.1%, temperature drift 50 ppm) and differential operational amplifier U11/U13/U14 can realize sampling of solar input current, battery charging/discharging current and load 1-load 4, the larger the current flowing through current sampling resistor R107/R126/R127/R128/R129 is, the larger the voltage difference between two ends of the resistor is, signal amplification can be realized through differential operational amplifier U11/U13/U14, and the corresponding current can be known after being input into a singlechip with ADC function.

According to ohm's law: v = α IR, where α is the amplification gain of the differential operational amplifier U11/U13/U14, I is the current flowing through the four-wire high-precision current sampling resistor, R is the resistance of the four-wire high-precision current sampling resistor, and a voltage value V can be obtained through ADC sampling of the single chip microcomputer, so that a current value I can be calculated.

The main functions of the module are: analog signals such as the voltage and the current of the solar panel, the voltage and the current of the storage battery, the current of the 4-path load and the like are switched through the module switch chip U7, the analog signals are sequentially input into an ADC (analog to digital converter) channel of the MCU, and the MCU is converted into digital signals through analog to digital conversion, so that the numerical values of the signals are measured and calculated.

U1 is power chip LDO, and output 3.3V for MCU power supply.

The main functions of the module are: MCU reads temperature and humidity information of temperature and humidity sensor chip U5 through I2C to realize supervisory equipment's ambient temperature and humidity information.

The signal of the sampled load current is amplified by the differential operational amplifier U13/U14 and then input to the negative terminal of the comparator U12, if the load current is larger, the negative terminal input of the U12 is larger than the positive terminal voltage, the comparator U12 outputs low level, the voltage output of the first load 1 is cut off through the NMOS Q3, and therefore the purposes of protecting the system and the load are achieved. Because the function is realized by a hardware circuit without software, the overcurrent protection can be realized very quickly and powerfully (the reaction time is less than 1 uS).

Meanwhile, the output signal (PIN 1/PIN 7) of the U12 is input to an external interrupt signal PIN of the MCU, and the MCU can capture the abnormal interrupt, so that the overcurrent abnormality is judged.

The GPIO of the MCU can also control the on-off of the load through the U16.

The chip U16 is a leakage output chip and mainly realizes the function of 'wired and', the GPIO of the MCU and the comparator realize the power switch control of 4-way output load together as shown in the U12/U24 in fig. 13, when the 4-way output load is not over-current or short-circuit abnormal, the U12/U24 outputs high level, and at the moment, the GPIO of the MCU can control the power switch of four-way output load through the U16/U26; when the 4-path load is in overcurrent or short circuit abnormality, the U12/U24 outputs low level, and the output power supply of the 4-path load is immediately cut off through the U16/U26.

The module has the main function of converting serial port data of the MCU singlechip into 4G signals or converting the 4G signals into serial port data and communicating with the MCU, thereby realizing the function of remote monitoring. U27 is a 4G chip module, mainly realizes 4G signal and singlechip MCU's serial ports signal conversion. The serial port signal of the MCU of the singlechip is converted into a 4G signal through U27, and then the communication link with the remote controller can be established. And transmitting the data to a background server.

In the attached drawing, a burning interface of an MCU control module, a watchdog reset module and a clock module are mainly demonstrated. The burning interface of the MCU control module is realized by interfaces J1-J _2R5_5, D22, D23, D24 and the like, and the J1 interface circuit is a program downloading interface of the singlechip and realizes the on-line burning function of the singlechip program through the interface.

The watchdog reset module, chip U2 is a main module of the hardware watchdog circuit. The single chip microcomputer MCU feeds the dog through the program, if the single chip microcomputer MCU program runs off or hangs up due to some reason, the single chip microcomputer MCU can not feed the dog in time, after a certain time, the U2 sends out a reset signal, and the hardware resets the single chip microcomputer, thereby ensuring the normal operation of the single chip microcomputer program.

And the clock module, the chip U4 is a clock chip, and the singlechip synchronizes the clock information of the network server with the clock of the clock chip, so as to realize the synchronization of the local clock and the network clock.

The 485 communication module circuit is mainly demonstrated in the drawing. The 485 communication module circuit realizes functions through U6. The chip U6 is a 485 circuit, mainly realizes that the serial port of singlechip converts industrial grade 485 communication into, improves the interference killing feature of data communication link.

The embodiment of the utility model provides a 4 way load voltage control principle circuit schematic diagrams, 4 way load voltage control module, first load module, second load module, third load module, fourth load module mainly realize 4 way load output power's electronic switch control. The first load module is taken as an example for explanation, and other similarities, the switching on and off of the NMOS SI2304 is realized by outputting the high and low levels of the NMOS SI2304 Vgs, and further the switching on and off of the PMOS SI4435 are realized, so that the switching on and off of 4-path load output voltage is realized. When Vgs of the NMOS SI2304 is in a high level, DS of the NMOS SI2304 is conducted, a resistor connected in parallel with the PMOS SI4435 GS and a resistor connected in series with the D electrode of the NMOS SI2304 form a loop, and then the PMOS SI4435 Vgs is larger than a threshold value and the PMOS DS is conducted, so that output of a load output power supply is realized; on the contrary, when Vgs of the NMOS SI2304 is at a low level, DS of the SI2304 is not turned on, a resistor connected in parallel with the PMOS SI4435 GS and a resistor connected in series with the D-pole of the NMOS SI2304 are opened, Vgs of the PMOS has no voltage difference, and DS of the PMOS is not turned on, thereby implementing turn-off of the load output power supply.

The chip U16/U26 is a leakage-opening output chip and mainly realizes the function of 'wired and', the GPIO of the MCU and the comparator U12/U24 together realize the power switch control of 4-path output load, when the 4-path output load is not over-current or short-circuit abnormal, the U12/U24 outputs high level, and at the moment, the GPIO of the MCU can control the power switch of four-path output load through the U16/U26; when the 4-path load is in overcurrent or short circuit abnormality, the U12/U24 outputs low level, and the output power supply of the 4-path load is immediately cut off through the U16/U26.

The embodiment of the utility model provides an in the analog switch module and power chip LDO circuit principle circuit schematic diagram that provide. The analog switch module is realized by U7, U7 is an analog switch circuit (or called as 3-8 decoder), GPIO of the MCU realizes that a certain path between Y0-Y7 is switched to a COM pin by controlling a gating pin S0/S1/S2 of the chip and is output to an ADC pin of the MCU, and therefore analog-to-digital conversion of voltage and current analog quantity is realized.

The function of the LDO of the power supply chip is realized through U1, U1 is a power supply DC-DC module and is a linear LDO power supply module, 3.3V power supply is provided for the MCU of the single chip microcomputer, and TLV70433DBVR is preferably adopted.

Fig. 15 is a schematic circuit diagram of the reference voltage module of the solar panel current signal amplifying module, the storage battery/charging current signal amplifying module, and the differential operational amplifier provided in the embodiment of the present invention.

The embodiment of the utility model provides a solar panel current signal amplifies module, battery charging current signal amplifies module, the reference voltage module circuit principle circuit schematic diagram that difference fortune was put. The solar panel current signal amplification module is realized through U11; the storage battery/charging current signal amplification module realizes functions through U12; the reference voltage module of the differential operational amplifier functions through U17.

The embodiment of the utility model provides an in prevent that electric current flows backward solar module, prevent that battery overdischarge module circuit schematic diagram. Prevent that battery current from flowing backward to solar panel module: when the solar panel is used in sunny days or the illumination intensity is large enough, the voltage of Q3(NMOS SI2304) Vgs is larger than the threshold voltage through the voltage-dividing resistor network R77/R83, the DS of Q3 is conducted, the voltage of Q7(PMOS SI4435) G is reduced, the Vgs voltage of Q7 is larger than the threshold voltage, the DS of Q7 is conducted, and the battery charging is realized; on the contrary, when the night or the illumination intensity is insufficient, the solar panel has no voltage output, the voltage of Q3(NMOS SI2304) Vgs is less than the threshold voltage, the DS of Q3 is not turned on, the voltage of Vgs of Q7 is 0 and is less than the threshold voltage, the DS of Q7 is not turned on, and the body diode is reversely turned off, so that the battery current is prevented from flowing backwards to the solar panel module.

Cell over-discharge prevention module: when the battery voltage is greater than the cut-off voltage, the voltage of Q8(NMOS SI2304) Vgs is greater than the threshold voltage through a voltage dividing resistance network R29/R86, the DS of Q8 is turned on, the voltage of Q12(PMOS SI4435) G is pulled down, the Vgs voltage of Q12 is greater than the threshold voltage, the DS of Q12 is turned on, and the battery is discharged to the load; on the contrary, when the battery voltage is less than the cutoff voltage, the voltage of Q8(NMOS SI2304) Vgs is less than the threshold voltage, DS of Q8 is not turned on, the Vgs voltage of Q12 is 0, less than the threshold voltage, DS of Q12 is not turned on, and the body diode is reversely turned off, thereby realizing the function of preventing the battery from being overdischarged.

The embodiment of the utility model provides an in the provided DC/DC module schematic diagram. The DC/DC module functions through U29.

In summary, as shown in the system block of fig. 1, the whole system is composed of a solar panel module 1, a lightning surge protection module 2, a first resistive voltage division network module 3, a first four-wire high-precision current sampling resistor module 4, a solar charging management module 5, a second resistive voltage division network module 6, a second four-wire high-precision current sampling resistor module 7, a third four-wire high-precision current sampling resistor module 8, a fourth four-wire high-precision current sampling resistor module 9, a fifth four-wire high-precision current sampling resistor module 10, a differential operational amplifier and overcurrent monitoring protection module 11, a first PMOSFET module 12, a second PMOSFET module 13, a third PMOSFET module 14, a fourth PMOSFET module 15, a fifth osfet PMOSFET module 16, a logic or gate module 17, an MCU module with ADC function 18, a 5G/4G module 24, a temperature and humidity sensor module 25, a background server module 26 and a storage battery module 19, the solar energy monitoring system comprises a first load module 20, a second load module 21, a third load module 22 and a fourth load module 23, wherein existing equipment mainly powered by solar energy cannot monitor solar energy acquisition information and load working condition information in real time at the background. In addition, if the solar energy collecting device or the load has a fault, the fault load cannot be timely and effectively fed back at the background and actively cut off. The utility model discloses can be at the operating mode of on-the-spot or long-range backstage real time monitoring solar equipment to collect and handle relevant data information, for the optimization or the deployment of relevant equipment provide data support, can initiatively cut off the load when the load breaks down, and can be in long-range in time discover the trouble of relevant subcomponent, provide the reference for the maintenance of equipment personnel.

It is right above the utility model provides a power supply board with four ways load output for solar charging has carried out detailed introduction, to the general technical personnel in this field, according to the utility model discloses the thought, all has the change part on concrete implementation and application scope, to sum up, this description content should not be understood as right the utility model discloses a restriction.

Claims

1. A power supply board with four-way load output for solar charging, comprising: a solar panel module (1), a lightning surge protection module (2), a first resistance voltage division network module (3), a first four-wire high-precision current sampling resistance module (4), a solar charging management module (5), a second resistance voltage division network module (6), a second four-wire high-precision current sampling resistance module (7), a third four-wire high-precision current sampling resistance module (8), a fourth four-wire high-precision current sampling resistance module (9), a fifth four-wire high-precision current sampling resistance module (10), a differential operational amplifier and overcurrent monitoring protection module (11), a first PMOSFET module (12), a second PMOSFET module (13), a third PMOSFET module (14), a fourth PMOSFET module (15), a fifth PMOSFET module (16), a logic or gate module (17), an MCU module (18) with ADC function, a 5G/4G module (24), a temperature and humidity sensor module (25), a background server module (26) and a battery module (19), a first load module (20), a second load module (21), a third load module (22), a fourth load module (23), wherein:

the solar panel module (1) is connected with one end of the lightning surge protection module (2), is connected with the other end of the first resistance voltage division network module (3), and is connected to the solar charging management module (5) through the first resistance voltage division network module (3);

the lightning surge protection module (2) is connected with one end of the first four-wire high-precision current sampling resistor module (4), is connected with one end of the second resistor voltage division network module (6), and is connected to the differential operational amplifier and overcurrent monitoring protection module (11) through the second resistor voltage division network module (6);

one end of each of the first four-wire high-precision current sampling resistance module (4) to the fifth four-wire high-precision current sampling resistance module (10) is connected to the differential operational amplifier and overcurrent monitoring protection module (11), and the other end of each of the first four-wire high-precision current sampling resistance module to the fifth four-wire high-precision current sampling resistance module is connected to the fifth PMOSFET module (16) through the first PMOSFET module (12) and the fourth PMOSFET module (23) respectively;

one end of the MCU module (18) with the ADC function is connected to the logic OR gate module (17), and the other end of the MCU module is connected to the 5G/4G module (24) and the background server module (26) through RS 485;

one end of the temperature and humidity sensor module (25) is connected to the MCU module (18) with the ADC function.

2. The power supply board with four-way load output for solar charging according to claim 1, wherein the solar panel module (1) is used for realizing a photoelectric conversion function.

3. The power supply board with four-way load output for solar charging according to claim 2, characterized in that the lightning surge protection module (2) is used for realizing lightning surge protection.

4. The power supply panel with four load outputs for solar charging according to claim 3, wherein the first resistive voltage dividing network module (3), the first four-wire high-precision current sampling resistor module (4) and the solar charging management module (5) are used for converting the voltage of the solar panel into the charging voltage of the storage battery, and the MPPT algorithm is adopted to realize 3-segment charging, wherein the power management chip of the solar charging management module (5) adopts BQ 24650.

5. The power supply board with four-way load output for solar charging according to claim 4, characterized in that the second resistive divider network module (6) is used for sampling solar panel voltage and battery voltage.

6. A panel for solar charging with four load outputs according to claim 5, characterized by the first four-wire high precision current sampling resistor module (4), the second resistor voltage dividing network module (6), the second four-wire high precision current sampling resistor module (7), the third four-wire high precision current sampling resistor module (8), the fourth four-wire high precision current sampling resistor module (9), the fifth four-wire high precision current sampling resistor module (10), which together are used to sample the solar panel current, the battery current and the first to fourth load module (20) to (23) currents.

7. The panel with four-way load output for solar charging according to claim 6, wherein the differential operational amplifier and overcurrent monitoring protection module (11) is used for small analog signal amplification of sampled solar panel voltage and battery voltage, solar panel current, battery current and first to fourth load module (20 to 23) currents, and simultaneously the overcurrent monitoring protection module adopts a comparator device to realize hardware level overcurrent protection and report the abnormality of the corresponding module to the MCU module (18).

8. The power supply board with four-way load output for solar charging as claimed in claim 7, wherein:

the logic or gate module (17) is used for logic or function, and the MCU module (18) and the differential operational amplifier and overcurrent monitoring protection module (11) can simultaneously control the switch of the storage battery module (19) and the switch of the first load module (20) to the fourth load module (23) to be switched off;

the MCU module (18) with the ADC function is used for a communication function, an analog quantity-to-digital quantity conversion function, an equipment operation environment temperature and humidity monitoring function and a voltage and current monitoring function, and when the working conditions of the load and the battery are abnormal, abnormal information is informed to a background, or the working state of the related load is controlled by cutting off a power supply according to the working condition requirement;

the temperature and humidity sensor module (25) is used for acquiring temperature and humidity information of an equipment operating environment and informing the acquired temperature and humidity information to the MCU module (18);

the 5G/4G module (24) is used for wireless communication function and transmitting the related information of the equipment to the background server module (26) through wireless signals.