CN201312403Y - Intelligent solar energy lamp controller - Google Patents

Abstract

The utility model discloses an intelligent solar lamp controller. It is an intelligent solar energy with reasonable functions, performance and settings developed for the control requirements of solar street lamps, garden lamps, signal lamps and some small photovoltaic projects. Lighting controller. Its structure is as follows: it includes single-chip microcomputer working circuit, which is respectively connected with power supply circuit, charging circuit, discharging circuit, voltage and voltage sampling circuit, current detection circuit, temperature compensation and digital tube display circuit. The controller provides comprehensive protection functions for the battery, so that the battery can work more reliably for a long time. Therefore, the utility model is used in conjunction with a solar lamp controller, and can realize monitoring and management of the solar lamp all the time.

Description

Intelligent solar lamp controller

technical field

The utility model relates to an intelligent solar lamp controller.

Background technique

At present, the whole world is advocating energy conservation, and our country is also vigorously promoting the construction of a conservation-oriented society, so the application of solar photoelectric lamps has great market potential. Solar lighting products have the advantages of no need to lay cables, no need to dig cable trenches, one-time investment, safe and reliable operation, etc., so that they came into being after the popularization of solar water heaters, and are gradually being favored by real estate developers and municipal construction departments. An important part of solar power supply is the solar controller. The performance of the solar controller directly affects the life of the system, especially the life of the battery. Overcharging or overdischarging under any circumstances will cause serious damage to the battery. Of course, it will affect the cost performance of the whole system, and the future system maintenance cost will be greatly increased due to the frequent replacement of the battery. There are many types of control used in photovoltaic power generation systems, such as switch-type controllers, PWM-type controllers, maximum power tracking charge controllers, etc. At present, most of the controllers used in our country are simple design controllers, and intelligent controllers are only used in communication systems and larger photovoltaic power plants. Compared with foreign controllers, the main gap in my country is that domestic controllers are prone to failure due to device quality, non-polarity reverse connection, short circuit, and device damage caused by overcurrent; the degree of specialization is low, and pulse width adjustment or maximum Control of power tracking mode.

All in all, the development of optoelectronics is very fast, and more and more lighting projects are being undertaken externally. As the core component of solar lamps, solar lamp controllers are particularly important to meet the functions and performance requirements of solar lamps to the greatest extent.

Contents of the invention

The purpose of this utility model is to provide an intelligent solar lamp controller capable of realizing monitoring and management of solar lamps all the time in view of the existing defects of the above-mentioned controller.

In order to realize the above object, the technical scheme that the utility model takes is:

An intelligent solar lamp controller includes a single-chip microcomputer working circuit, which is respectively connected with a power supply circuit, a charging circuit, a discharging circuit, a voltage and voltage sampling circuit, a current detection circuit, a temperature compensation circuit, and a nixie tube display circuit.

The voltage sampling circuit includes a battery panel voltage sampling circuit, which is connected with the storage battery voltage sampling circuit and the light source voltage sampling circuit.

The current detection circuit includes a load overcurrent protection circuit and a load discharge circuit.

The working circuit of the single-chip microcomputer is selected from the MC9S08AC8 single-chip microcomputer working circuit.

The intelligent solar lamp controller of the utility model can provide a comprehensive protection function for the storage battery, automatically protect the storage battery from being overcharged and overdischarged, and make the storage battery work more reliably for a long time. So as to ensure that the entire solar lighting system can work well.

The beneficial effects of the utility model are: compared with the prior art, the utility model has the following functions: increase the constant output function of the signal lamp, and increase the pulse output function when the load is LED, so as to save the power consumption of the LED light source. Adopt a more suitable charging method to achieve the greatest possible anti-sulfation of the battery, thereby improving the life of the battery. A variety of mode options, set outside the shell, easy to operate.

Description of drawings

Fig. 1 is the functional block diagram of the solar lamp controller of the present utility model;

Fig. 2 is the charging circuit diagram of the intelligent solar lamp controller described in the utility model;

Fig. 3 is the discharge circuit diagram of the intelligent solar lamp controller described in the utility model;

Fig. 4 is the current detection circuit of the intelligent solar lamp controller described in the utility model;

Fig. 5 is a power supply circuit diagram of the intelligent solar lamp controller described in the utility model;

Fig. 6 is the single-chip microcomputer working circuit of the intelligent solar lamp controller described in the utility model.

Among them, 1. Power supply circuit, 2. Voltage sampling circuit, 3. Current detection circuit, 4. SCM working circuit, 5. Charging circuit, 6. Discharging circuit, 7. Temperature compensation circuit, 8. Digital tube display circuit.

Detailed ways

The utility model will be further described below in conjunction with the accompanying drawings and specific embodiments, but not as a limitation of the utility model.

As shown in Figure 1 is the principle circuit diagram of the intelligent solar lamp controller, including the single-chip microcomputer working circuit 4 and the power supply circuit 1 connected to the single-chip microcomputer working circuit 4, the charging circuit 5, the discharging circuit 6, the voltage sampling circuit 2, and the current detection circuit 3. Temperature compensation circuit 7 and digital tube display circuit 8. Wherein the voltage sampling circuit 2 includes a battery board voltage sampling circuit, a storage battery voltage sampling circuit and a light source voltage sampling circuit, the current detection circuit 3 includes a load overcurrent protection circuit and a load discharge circuit, and the single-chip working circuit 4 selects an MC9S08AC8 single-chip working circuit .

As shown in Figure 2 is the charging circuit 5, the calculation of the charging circuit: 1. Calculation when the overcharge point is 14.4V: when the microcontroller detects that the voltage at pin 24 is: 14.4V*R8/(R6+R8)=14.4V When ×5.1/(200+5.1)=0.35V, the overcharge point of the battery is reached, pins 13 and 14 output a high level, and the solar panel stops charging the battery, achieving the purpose of overcharge protection. 2. Calculation of the charging circuit voltage drop: RDS=8.0mΩ, when the charging current is 10A, the charging voltage drop is U=10A×8.0mΩ×2=0.16V, which is far less than 0.3V, so it meets the design requirements.

As shown in Figure 3 is the discharge circuit 6, the calculation of the discharge circuit: 1. The calculation of the over-discharge point voltage 23V: when the single-chip microcomputer detects that the voltage at the 24 pin is: 23V*R8/(R8+R6)=23V*5.1/ (200+5.1)=0.57V (voltage division principle). At this time, pin 12 of the single chip microcomputer outputs a low level, and Q9 as a switch tube is not turned on. At this time, the base of Q10 in Figure 3 is at a high level, turned on, and the UGS of the MOSFET Q19=0V, and the MOS tube is not turned on. , so the load 1 is no longer discharged, and the purpose of over-discharge protection is achieved. 2. Calculation of discharge circuit voltage drop: RDS＝8.0mΩ, sampling resistor R34＝4.0mΩ, when the discharge current is 10A, the discharge voltage drop is U＝10A×12.0mΩ＝0.12V, which is less than the required discharge circuit voltage drop 0.2V, so it meets the design requirements.

In Figure 2 and Figure 3, both P2 and P3 choose PNP transistor 9015 and NPN9014. The limit parameters are: power dissipation PCM=625mW and 400mW, maximum collector current ICM=100mA; maximum reverse voltage UCEO=-45V and 50V, current amplification factor hFE=60～1000. The maximum voltage of this circuit design is 28.8V<45V<50V. The maximum working current of the triode is 28.8/15=1.92mA and less than 100mA, and the power consumption W=0.5×0.0019=0.95mW is less than 625mW and less than 400mW. So 9015 and 9014 triodes fully meet the requirements.

As shown in Figure 4 is the current detection circuit 3, when the load current flows through R34 in the figure, the voltage R34*I=U3 is generated, and N201A is the same-phase proportional operation voltage UO=(1+R47/R46)U3; 23 pins are collected When the U0 voltage is collected as 1.25 times of the rated current, after 60 seconds, pin 12 of the single chip microcomputer outputs a low level, and the load is turned off. Pin 23 collects the UO voltage. When it is 1.5 times the rated current, the single-chip microcomputer outputs low level at pin 12 after 20 seconds to turn off the load.

When the load is short-circuited, N201B is a comparison circuit. When the current exceeds 28.6 times, one is forced to enter the interrupt state, and the other is to turn off the load working MOS tube to realize over-current protection for the controller. Load 1 discharge current and load 2 discharge current are collected to detect whether the lamp has an appropriate current output when the load has a power output, and no output indicates that the light source of the lamp is turned on.

As shown in Figure 5 is the power circuit 1, the input voltage of LM2931A in the figure is 5.6V ~ 26V, U2 pin 8 is used as the input terminal, the voltage at C will not be higher than 26V, because the battery voltage will not exceed 30V , sufficient to meet the input voltage conditions. UA=5V is relative to C terminal, and relative to B-, which is the reference ground, it is 9V. For U3, there is no problem if the input is 9V and the output is 5V.

As shown in Figure 6, the single-chip microcomputer working circuit 4 selects MC9S08AC8 single-chip microcomputer (U1A).

The utility model is used in conjunction with a solar lamp controller (system voltage 12V and 24V automatic identification, rated current 10A), and consists of a single-chip microcomputer working circuit (MC9S08AC8 single-chip microcomputer working circuit) and a power supply circuit connected to the single-chip microcomputer working circuit, a charging circuit, and a storage battery A/ D acquisition circuit, battery board A/D acquisition, load discharge circuit, load overcurrent protection circuit, digital tube display circuit, temperature compensation circuit, buttons and LD1~LD3 display circuit. And it has battery overcharge and overdischarge protection (it is recommended to adjust the overdischarge protection value according to the discharge rate); battery board anti-reverse function; light control on, timing off light, light control off light function; load short circuit protection; Current protection; battery anti-vulcanization function; battery intelligent discharge function and a series of new functions. And considering the environment, its performance is also a new type of intelligent photoelectric controller that meets the low temperature requirements of the Northeast market (low temperature resistance -30°C). The utility model is only one of the preferred specific implementation modes, and the usual changes and replacements performed by those skilled in the art within the scope of the technical solution of the utility model should be included in the protection scope of the utility model.

Claims (4)

1. intelligent solar lamp tool controller, it is characterized in that, it comprises the single-chip microcomputer operating circuit, and the single-chip microcomputer operating circuit is connected with power circuit, charging circuit, discharge circuit, voltage sampling circuit, current detection circuit, temperature-compensating and charactron display circuit respectively.

2. intelligent solar lamp tool controller as claimed in claim 1 is characterized in that described voltage sampling circuit comprises the cell plate voltage sample circuit, and it is connected with battery tension sample circuit and light source voltage sample circuit.

3. intelligent solar lamp tool controller as claimed in claim 1 is characterized in that described current detection circuit comprises load current foldback circuit and load discharge circuit.

4. intelligent solar lamp tool controller as claimed in claim 1 is characterized in that described single-chip microcomputer operating circuit is selected MC9S08AC8 single-chip microcomputer operating circuit for use.

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