CN208025385U - A kind of solar lawn lamp and its control circuit - Google Patents

Abstract

The utility model belongs to the LED Solar Light technical field, provides a kind of solar lawn lamp and its control circuit comprising：Accumulator, the accumulator are connect with the solar panel, and the solar panel is used to charge to the accumulator；Electric power detection unit, the electric power detection unit are connect with the accumulator, the electricity for detecting the accumulator；Chip is controlled, the control chip is connect with the electric power detection unit, and control signal is exported according to the information about power of the accumulator；Switch unit, the switch unit is connect with the control chip, according to the control signal conduction or shutdown；Light-sensitive device, the light-sensitive device are connect with the control chip, and for detecting ambient light signal, the control chip controls the output of the control signal according to the ambient light signal.Brightness is distributed according to sunlight power, lamps and lanterns automatic regulating lightness keeps Lawn lamp more intelligent to make the working time meet the time of standard design.

Description

A solar lawn lamp and its control circuit

technical field

The utility model belongs to the technical field of solar LED lamps, in particular to a solar lawn lamp and a control circuit thereof.

Background technique

At present, the mass production of traditional LEDs has approached or even surpassed traditional light sources, and has entered the fast lane of accelerated development in recent years. At the same time, with the continuous maturity of solar photovoltaic production technology, the price of photovoltaic cells has plummeted, and the application of photovoltaic cells has It has been popularized in various fields, so an emerging industry, solar LED lighting, has attracted the attention of relevant industry professionals. Solar LED lighting fully combines the advantages of two green energy sources, LED and solar energy, and has become the best solution in some occasions.

Existing solar lawn lights absorb sunlight during the day, and work longer when the sunlight is sufficient, and will continue to work until the battery is completely dead. There is no guarantee of working hours when there is insufficient sunlight, and no work in cloudy and rainy days. Completely "depending on the sky", the working hours of solar landscape lighting are different due to different lighting conditions in different seasons, the working hours of solar landscape lighting are different due to different solar radiation in different regions or countries, and the working hours of solar landscape lighting are different in different weather environments They vary in length.

Therefore, there is the problem that the working time of the solar lawn lamp cannot be guaranteed in the traditional technical solution.

Utility model content

The purpose of the utility model is to provide a control circuit of a solar lawn lamp, aiming at solving the problem that the working time of the solar lawn lamp cannot be guaranteed in the traditional technical solution.

A control circuit of a solar lawn lamp is connected between a solar panel and an LED lamp, and the control circuit includes:

a battery, the battery is connected to the solar panel, and the solar panel is used to charge the battery;

A power detection unit, the power detection unit is connected to the storage battery and is used to detect the power of the storage battery;

a control chip, the control chip is connected to the power detection unit, and outputs a control signal according to the power information of the storage battery;

a switch unit, the switch unit is connected to the control chip, and is turned on or off according to the control signal;

A photosensitive device, the photosensitive device is connected to the control chip for detecting an ambient light signal, and the control chip controls the output of the control signal according to the ambient light signal.

In one embodiment, the power detection unit includes a first resistor and a second resistor, the first resistor is connected in series between the positive pole and the negative pole of the storage battery, and the common connection of the first resistor and the second resistor is The terminal is connected with the control chip.

In one embodiment, the switch unit includes a first switch tube, a third resistor, a fourth resistor and a first capacitor; the first end of the first switch tube is connected to the LED lamp, and the first switch The second end of the tube is grounded through the third resistor, the control terminal of the first switch tube is connected to the control chip through the fourth resistor, and the first capacitor is connected to the control terminal of the first switch tube and between.

In one embodiment, the first switch transistor is a transistor or a MOS transistor.

In one of the embodiments, a charge and discharge management unit is further included, and the charge and discharge management unit is connected between the solar panel and the storage battery.

In one embodiment, the charging and discharging management unit includes a triode, a third resistor, a fourth resistor, a fifth resistor, a sixth resistor, a seventh resistor, and a voltage regulator; the third resistor and the fourth resistor are connected in series with The storage battery is connected in parallel, and the fifth resistor is connected in series with the voltage stabilizing source in parallel with the battery, wherein, the cathode of the voltage stabilizing source is connected to the fifth resistor, the anode of the stabilizing source is grounded, and the gate of the triode is connected to the cathode of the voltage stabilizing source and the fifth resistor through the sixth resistor. The common connection terminal of the fifth resistor, the source of the triode is grounded through the seventh resistor, and the emitter of the triode is connected to the positive pole of the storage battery.

In one embodiment, the control signal is a PWM signal, and the control signal adjusts the brightness and time of the LED lamp through the switch unit.

In addition, a solar lawn lamp is also provided, including: a solar battery panel, an LED lamp, and the above-mentioned control circuit of the solar lawn lamp connected between the solar battery panel and the LED lamp.

The above-mentioned control circuit of the solar lawn lamp charges the storage battery through the solar panel, the power detection unit detects the power of the storage battery, and the control chip outputs a control signal according to the power information of the battery; the switch unit is turned on or off according to the control signal, and the photosensitive The device detects the ambient light signal, and the control chip controls the output of the control signal according to the ambient light signal, so as to control the on-off and brightness of the LED lamp, detect the daily lighting conditions, and distribute the brightness according to the intensity of the sunlight. The lamp automatically adjusts the brightness, so that the work The time meets the standard design time, making lawn lights more intelligent.

Description of drawings

Fig. 1 is the structural representation of the solar lawn lamp that the utility model embodiment provides;

Fig. 2 is an example circuit schematic diagram of the control circuit of the solar lawn lamp provided by the embodiment of the utility model.

Detailed ways

In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model, and are not intended to limit the utility model.

Fig. 1 shows the structural representation of the control circuit of the solar lawn lamp that the preferred embodiment of the present invention provides, for ease of description, only shows the part relevant to this embodiment, detailed description is as follows:

A solar lawn lamp, comprising: a solar panel 200, an LED lamp 300, and a control circuit 100 of the solar lawn lamp connected between the solar panel 200 and the LED lamp 300. It can detect the daily light conditions, distribute the brightness according to the intensity of sunlight, and automatically adjust the brightness of the lamps, so that the working time can meet the standard design time and make the lawn lamp more intelligent.

As shown in FIG. 1 and FIG. 2 , the control circuit 100 of the solar lawn lamp includes: a battery 10 , a control chip 20 , a power detection unit 30 , a switch unit 40 and a photosensitive device.

The storage battery 10 is connected to the solar cell panel 200 , the solar cell panel 200 is used to charge the storage battery 10 , the solar cell panel 200 collects solar energy, converts the solar energy into electrical energy, and stores the electrical energy in the storage battery 10 . The control circuit 100 also includes a charging and discharging management unit connected between the solar panel 200 and the storage battery 10 for managing the charging and discharging of the storage battery 10 .

The charge and discharge management unit includes a triode Q2, a fifth resistor R5, a sixth resistor R6, a seventh resistor R7, an eighth resistor R8, a ninth resistor R9 and a voltage regulator U1; the fifth resistor R5 and the sixth resistor R6 are connected in series with The storage battery 10 is connected in parallel, and the seventh resistor R7 is connected in parallel with the battery 10 after being connected in series with the voltage stabilizing source U1, wherein, the cathode of the voltage stabilizing source U1 is connected to the seventh resistor R7, the anode of the stabilizing voltage source U1 is grounded, and the gate of the triode Q2 passes through the eighth The resistor R8 is connected to the cathode of the voltage stabilizing source U1 and the common terminal of the seventh resistor R7 , the source of the triode Q2 is grounded through the ninth resistor R9 , and the emitter of the triode Q2 is connected to the positive pole of the battery 10 .

The power detection unit 30 is connected to the battery 10 for detecting the power of the battery 10. Specifically, the power detection unit 30 includes a first resistor R1 and a second resistor R2, and the first resistor R1 is connected in series between the positive pole and the negative pole of the battery 10. , the common connection end of the first resistor R1 and the second resistor R2 is connected to the control chip 20 . The power detection unit 30 detects the output voltage of the storage battery 10 , and outputs power information to the control chip 20 after the voltage is divided by the first resistor R1 and the second resistor R2 .

The control chip 20 is connected to the power detection unit 30, and outputs a control signal according to the power information of the storage battery 10; the switch unit 40 is connected to the control chip 20, and is turned on or off according to the control signal; the switch unit 40 includes a first switch tube Q1, a third Resistor R3, fourth resistor R4, and first capacitor C1; the first end of the first switching tube Q1 is connected to the LED lamp 300, the second end of the first switching tube Q1 is grounded through the third resistor R3, and the control of the first switching tube Q1 The terminal is connected to the control chip 20 through the fourth resistor R4, and the first capacitor C1 is connected between the control terminal of the first switching transistor Q1 and the ground. The first switching transistor Q1 is a transistor Q2 or a MOS transistor. The control signal is a PWM signal, and the control signal adjusts the brightness and time of the LED lamp 300 through the switch unit 40 .

The control circuit 100 also includes a voltage divider circuit. The voltage divider circuit includes a tenth resistor R10 and an eleventh resistor R11. The tenth resistor R10 and the eleventh resistor R11 are connected in parallel to the two output terminals of the solar panel 200 after being connected in series. The tenth resistor R10 and the eleventh resistor R11 divide the voltage to detect the voltage value output by the solar panel 200 , so as to monitor the output of the solar panel 200 . The control circuit 100 also includes a Zener diode D1 and a switch K1. The Zener diode D1 is connected between the charge management unit and the positive pole of the storage battery 10 to prevent reverse discharge of the battery 10. The switch K1 is connected to the positive pole of the battery 10 and the LED lamp 300. Between the positive poles, it is used as a discharge switch of the lawn lamp, which is used to turn on and off the LED lamp 300 .

The photosensitive device is a photosensitive resistor. Specifically, the photosensitive device is connected to the control chip 20 for detecting ambient light signals. The photosensitive resistor judges whether the current light environment is a daytime environment or a nighttime environment according to the detected ambient light intensity, and outputs an ambient light signal. And the control chip 20 controls the output of the control signal according to the ambient light signal. When it is determined that it is a daytime environment, the control chip 20 stops outputting the control signal, and the LED light 300 remains off; when it is determined that it is a night environment, the control chip 20 outputs the control signal. The LED lamp 300 is on. Moreover, the control chip 20 can calculate the lighting time and brightness of the lawn lamp according to the electric quantity of the current storage battery 10 and the current season. The power value calculates the brightness of these 8 hours, so as to output a control signal to control the LED lamp 300 .

The above descriptions are only preferred embodiments of the present utility model, and are not intended to limit the present utility model. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present utility model shall be included in this utility model. within the scope of protection of utility models.

Claims (8)

1. a kind of control circuit of solar lawn lamp, is connected between solar panel and LED light, which is characterized in that institute Stating control circuit includes：

Accumulator, the accumulator are connect with the solar panel, and the solar panel is used for the accumulator Charging；

Electric power detection unit, the electric power detection unit are connect with the accumulator, the electricity for detecting the accumulator；

Chip is controlled, the control chip is connect with the electric power detection unit, is exported according to the information about power of the accumulator Control signal；

Switch unit, the switch unit is connect with the control chip, according to the control signal conduction or shutdown；

Light-sensitive device, the light-sensitive device are connect with the control chip, for detecting ambient light signal, the control chip root The output of the control signal is controlled according to the ambient light signal.

2. control circuit as described in claim 1, which is characterized in that the electric power detection unit includes first resistor and second Resistance, the first resistor are series between the anode and cathode of the accumulator, the public affairs of the first resistor and second resistance Connecting pin is connect with the control chip altogether.

3. control circuit as described in claim 1, which is characterized in that the switch unit includes first switch pipe, third electricity Resistance, the 4th resistance and the first capacitance；The first end of the first switch pipe connects the LED light, and the of the first switch pipe Two ends are grounded by the 3rd resistor, and the control terminal of the first switch pipe connects the control core by the 4th resistance Piece, first capacitance connection is between the control terminal and ground of the first switch pipe.

4. control circuit as claimed in claim 3, which is characterized in that the first switch pipe is triode or metal-oxide-semiconductor.

5. control circuit as described in claim 1, which is characterized in that further include management of charging and discharging unit, the charge and discharge fulgurite Reason unit is connected between the solar panel and the accumulator.

6. control circuit as claimed in claim 5, which is characterized in that the management of charging and discharging unit includes triode, third Resistance, the 4th resistance, the 5th resistance, the 6th resistance, the 7th resistance and source of stable pressure；3rd resistor and the 4th resistance series connection after with storage Cell parallel, it is in parallel with accumulator after the 5th resistance is source-series with voltage stabilizing, wherein the cathode of source of stable pressure and the 5th resistance, voltage stabilizing The plus earth in source, the grid of triode connect the public connecting end of the cathode and the 5th resistance of source of stable pressure by the 6th resistance, The source electrode of triode passes through the 7th resistance eutral grounding, the anode of the emitter connection accumulator of triode.

7. control circuit as described in claim 1, which is characterized in that the control signal is pwm signal, the control signal Brightness and the time of the LED light are adjusted by the switch unit.

8. a kind of solar lawn lamp, which is characterized in that including：Solar panel, LED light and it is connected to the solar energy The control circuit of the solar lawn lamp as described in claim 1-7 between solar panel and the LED light.