CN104753112A - Solar LED control circuit - Google Patents
Solar LED control circuit Download PDFInfo
- Publication number
- CN104753112A CN104753112A CN201310748168.6A CN201310748168A CN104753112A CN 104753112 A CN104753112 A CN 104753112A CN 201310748168 A CN201310748168 A CN 201310748168A CN 104753112 A CN104753112 A CN 104753112A
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- semiconductor
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- H02J7/0077—
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or discharging batteries or for supplying loads from batteries
- H02J7/34—Parallel operation in networks using both storage and other DC sources, e.g. providing buffering
- H02J7/35—Parallel operation in networks using both storage and other DC sources, e.g. providing buffering with light sensitive cells
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- Dc-Dc Converters (AREA)
Abstract
The invention relates to the technical field of circuits and provides a solar LED control circuit having high charging efficiency. The solar LED control circuit comprises a solar panel, a charging circuit, a power output circuit and a control circuit; the current output end of the solar panel is electrically connected with the current input end of the charging circuit; the current output end of the charging circuit is electrically connected with the charging port of a storage battery; the current input circuit of the power output circuit is electrically connected with the current output end of the storage battery; the current output end of the power output circuit is electrically connected with the power input end of an LED; the control output end of the control circuit is electrically connected with the control end of the power output circuit; the control circuit comprises a microcontroller U2 and a battery voltage sampling circuit; the signal output end of the battery voltage sampling circuit is electrically connected with the signal input end of the microcontroller U2.
Description
Technical field
Circuit engineering field of the present invention, particularly a kind of solar LED control circuit.
Background technology
Always energy-saving and emission-reduction are topics got most of the attention, and the LED Solar Light has gathered the advantage of photovoltaic and LED simultaneously.The key point of the LED Solar Light is LED controller, and existing LED controller mainly exists following problem:
LED controller charge efficiency is low.Existing solar LED controller adopts step-down mode to be charge in batteries usually.If also there is no too large problem in some good cities of coefficient at sunshine, also use can be put up with by the capacity strengthening solar cell power output plate and storage battery, but just easily there is intermittent light-off phenomenon in the mode such in the very low city of coefficient at some at sunshine, cannot light light fixture especially during overcast and rainy particularly in the winter time more than a continuous week, controller is had no idea charging at all.So a lot of the LED Solar Light can only adopt mains hybrid mode to make up, applicability is not high, expensive.
Current LED controller non-transformer management mode, battery life is short.Most of controller all do not have truly realize power management, cause storage battery often to overcharge, cross put, accelerate the aging of storage battery.
The way of output of current LED controller is single.Controller nearly all on the market only has a kind of way of output, or is that direct on-off mode exports, or is that current constant mode exports, and so just uses to user and brings inconvenience.
Summary of the invention
In view of this, the invention provides a kind of can high efficiency charging solar LED control circuit.
The present invention is solved the problems of the technologies described above by following technological means:
Solar LED control circuit, comprise solar panel, charging circuit, power output circuit and control circuit, the current output terminal of described solar panel and the current input terminal of charging circuit electrically connect, the current output terminal of charging circuit is used for electrically connecting with the charging port of storage battery, the current input terminal of described power output circuit and the current output terminal of storage battery electrically connect, the current output terminal of described power output circuit is used for electrically connecting with the power input of LED, the control output end of described control circuit and the control end of power output circuit electrically connect, described control circuit comprises microcontroller U2 and battery voltage sampling circuit, the signal output part of described battery voltage sampling circuit and the signal input part of microcontroller U2 electrically connect.
Further, described charging circuit comprises control chip U1, metal-oxide-semiconductor Q1, metal-oxide-semiconductor Q2, diode D1, diode D2 and inductance L 1, the grid of metal-oxide-semiconductor Q1 and the control end of control chip U1 electrically connect, the drain electrode of metal-oxide-semiconductor Q1 is used for being connected with the positive pole of solar panel, and the source electrode of metal-oxide-semiconductor Q1 connects the negative pole of diode D1 and one end of inductance L 1 respectively; The grid of metal-oxide-semiconductor Q2 and the control end of control chip U1 electrically connect, the drain electrode of metal-oxide-semiconductor Q2 connects the other end of inductance L 1 and the positive pole of diode D2 respectively, the source electrode of metal-oxide-semiconductor Q2 connects with the negative electricity of solar panel, the negative pole of diode D2 is used for electrically connecting with the positive pole of storage battery, and the source electrode of metal-oxide-semiconductor Q2 is also for connecting with the negative electricity of storage battery.
Further, described control circuit comprises microcontroller U2, illumination sample circuit, battery voltage sampling circuit and current sampling circuit, and the signal output part of described illumination sample circuit, battery voltage sampling circuit and current sampling circuit and the signal input part of microcontroller U2 electrically connect.
Further, described power output circuit comprises metal-oxide-semiconductor Q3, metal-oxide-semiconductor Q4, diode D3, diode D4 and inductance L 2, the grid of metal-oxide-semiconductor Q3 and the control end of microcontroller U2 electrically connect, the drain electrode of metal-oxide-semiconductor Q3 and the positive pole of storage battery electrically connect, the source electrode of metal-oxide-semiconductor Q3 and one end of inductance L 2 electrically connect, the positive pole of inductance L 2 other end and diode D3 electrically connects, the grid of metal-oxide-semiconductor Q4 and the control end electrical connection of microcontroller U2, the drain electrode of metal-oxide-semiconductor Q4 and the positive pole of diode D3 electrically connect, and the source electrode of metal-oxide-semiconductor Q4 connects with the negative electricity of storage battery.
Further, the control end of described microcontroller U2 also electrically connects with the control end of control chip U1.
Further, described solar LED control circuit also comprises voltage indicator panel, button and temperature sensor, and described voltage indicator panel, button and temperature sensor electrically connect with microcontroller U2 respectively.
Beneficial effect of the present invention: solar LED control circuit of the present invention, the voltage that can realize by monitoring storage battery goes to control boost-buck power charging management chip to charge in batteries, a kind of charging modes of the best is selected by the height of monitoring battery tension, reach the seizure of maximum power point MPPT, realize high efficiency charging; Output is then flexible, then can select the different way of outputs by suitable setting, reaches best utilance.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the invention will be further described.
Fig. 1 is existing solar LED controller figure;
Fig. 2 is the structural representation of solar LED control circuit of the present invention.
Embodiment
Below with reference to accompanying drawing, the present invention is described in detail.
As shown in Figure 1, solar LED control circuit, comprise solar panel, charging circuit, power output circuit and control circuit, the current output terminal of described solar panel and the current input terminal of charging circuit electrically connect, the current output terminal of charging circuit is used for electrically connecting with the charging port of storage battery BT1, the current input terminal of described power output circuit and the current output terminal of storage battery BT1 electrically connect, the current output terminal of described power output circuit is used for electrically connecting with the power input of LED, the control output end of described control circuit and the control end of power output circuit electrically connect.
Described charging circuit comprises control chip U1, metal-oxide-semiconductor Q1, metal-oxide-semiconductor Q2, diode D1, diode D2 and inductance L 1, the grid of metal-oxide-semiconductor Q1 and the control end of control chip U1 electrically connect, the drain electrode of metal-oxide-semiconductor Q1 is used for being connected with the positive pole of solar panel, and the source electrode of metal-oxide-semiconductor Q1 connects the negative pole of diode D1 and one end of inductance L 1 respectively; The grid of metal-oxide-semiconductor Q2 and the control end of control chip U1 electrically connect, the drain electrode of metal-oxide-semiconductor Q2 connects the other end of inductance L 1 and the positive pole of diode D2 respectively, the source electrode of metal-oxide-semiconductor Q2 connects with the negative electricity of solar panel, the negative pole of diode D2 is used for electrically connecting with the positive pole of storage battery BT1, and the source electrode of metal-oxide-semiconductor Q2 is also for connecting with the negative electricity of storage battery BT1.
Described control circuit comprises microcontroller U2, illumination sample circuit, battery voltage sampling circuit and current sampling circuit, and the signal output part of described illumination sample circuit, battery voltage sampling circuit and current sampling circuit and the signal input part of microcontroller U2 electrically connect; Solar LED control circuit also comprises voltage indicator panel, button and temperature sensor, and described voltage indicator panel, button and temperature sensor electrically connect with the corresponding ports of microcontroller U2 respectively.Described battery voltage sampling circuit comprises and is connected in series with resistance R3 between storage battery BT1 both positive and negative polarity and resistance R4, current sampling circuit comprises the sampling resistor R5 be series between battery terminal negative and LED, and one end of sampling resistor R5 is electrically connected by the signal input part of amplifier and AD converter and microcontroller U2.Described illumination sample circuit comprises resistance R1, R2 of being connected between solar panel both positive and negative polarity; The control end of described microcontroller U2 also electrically connects with the control end of control chip U1.
Described control chip U1 selects existing boost-buck power managing chip, and described microcontroller U2 can select single-chip microcomputer and peripheral circuit thereof.
Described power output circuit comprises metal-oxide-semiconductor Q3, metal-oxide-semiconductor Q4, diode D3, diode D4 and inductance L 2, the grid of metal-oxide-semiconductor Q3 and the control end of microcontroller U2 electrically connect, the drain electrode of metal-oxide-semiconductor Q3 and the positive pole of storage battery BT1 electrically connect, the source electrode of metal-oxide-semiconductor Q3 and one end of inductance L 2 electrically connect, the positive pole of inductance L 2 other end and diode D3 electrically connects, the grid of metal-oxide-semiconductor Q4 and the control end electrical connection of microcontroller U2, the drain electrode of metal-oxide-semiconductor Q4 and the positive pole of diode D3 electrically connect, and the source electrode of metal-oxide-semiconductor Q4 connects with the negative electricity of storage battery BT1.
Be below example by 12V system, during solar panel generating, if generating voltage higher than preset light-operated open the light magnitude of voltage 8V time, microcontroller U2 then opens the enable port of control chip U1, and control chip U1 normally starts working.Daytime, control chip U1 allowed metal-oxide-semiconductor Q1 lead directly to, and carry out PWM control to metal-oxide-semiconductor Q2, inductance L 1, metal-oxide-semiconductor Q2 and diode D2 then form DC/DC decompression mode and charge to storage battery when the input voltage of solar panel is higher than battery tension 2V; Daytime is not when sunshine is very strong or time overcast and rainy, the output voltage of solar panel can be lower, when solar cell panel voltages is less than or equal to battery tension, control chip U1 allows metal-oxide-semiconductor Q1 carry out PWM control, allow Q2 be in off state, inductance L 1, metal-oxide-semiconductor Q1, diode D1, diode D2 then form DC/DC boost mode and charge to storage battery.In the process charged normal, the MPPSET pin of control chip U1, by the voltage of monitoring solar panel, realizes the seizure of maximum power point MPPT.In charging process, boost-buck power charging chip also can the voltage of timely monitor storage battery, and implement power management.
Solar panel generating voltage is lower than the light-operated magnitude of voltage that opens the light preset, and more than exceeding the time number that pre-sets minute, if microcontroller U2 then closes the enable port of efficient boost-buck power charging chip U1, efficient boost-buck power charging chip quits work, and meanwhile single-chip microcomputer is then identified as and arrives evening.When being set to switching mode, metal-oxide-semiconductor Q4 disconnects completely, metal-oxide-semiconductor Q3 is then responsible for switch, directly the electric energy of storage battery is exported to LED or power consumption equipment, when being set to DC/DC step-down constant current mode, metal-oxide-semiconductor Q3 then leads directly to, metal-oxide-semiconductor Q4 carries out PWM control, metal-oxide-semiconductor Q4, inductance L 2, diode D3 formation DC/DC step-down constant current mode is exported to LED lamp and is powered, when being set to DC/DC voltage increase and current constant pattern, metal-oxide-semiconductor Q4 disconnects completely, and inductance L 2, metal-oxide-semiconductor Q3, diode D3, diode D4 then form DC/DC voltage increase and current constant pattern and export to LED and power.
What finally illustrate is, above embodiment is only in order to illustrate technical scheme of the present invention and unrestricted, although with reference to preferred embodiment to invention has been detailed description, those of ordinary skill in the art is to be understood that, can modify to technical scheme of the present invention or equivalent replacement, and not departing from aim and the scope of technical solution of the present invention, it all should be encompassed in the middle of right of the present invention.
Claims (6)
1. solar LED control circuit, it is characterized in that: comprise solar panel, charging circuit, power output circuit and control circuit, the current output terminal of described solar panel and the current input terminal of charging circuit electrically connect, the current output terminal of charging circuit is used for electrically connecting with the charging port of storage battery, the current input terminal of described power output circuit and the current output terminal of storage battery electrically connect, the current output terminal of described power output circuit is used for electrically connecting with the power input of LED, the control output end of described control circuit and the control end of power output circuit electrically connect, described control circuit comprises microcontroller U2 and battery voltage sampling circuit, the signal output part of described battery voltage sampling circuit and the signal input part of microcontroller U2 electrically connect.
2. solar LED control circuit according to claim 1, it is characterized in that: described charging circuit comprises control chip U1, metal-oxide-semiconductor Q1, metal-oxide-semiconductor Q2, diode D1, diode D2 and inductance L 1, the grid of metal-oxide-semiconductor Q1 and the control end of control chip U1 electrically connect, the drain electrode of metal-oxide-semiconductor Q1 is used for being connected with the positive pole of solar panel, and the source electrode of metal-oxide-semiconductor Q1 connects the negative pole of diode D1 and one end of inductance L 1 respectively; The grid of metal-oxide-semiconductor Q2 and the control end of control chip U1 electrically connect, the drain electrode of metal-oxide-semiconductor Q2 connects the other end of inductance L 1 and the positive pole of diode D2 respectively, the source electrode of metal-oxide-semiconductor Q2 connects with the negative electricity of solar panel, the negative pole of diode D2 is used for electrically connecting with the positive pole of storage battery, and the source electrode of metal-oxide-semiconductor Q2 is also for connecting with the negative electricity of storage battery.
3. solar LED control circuit according to claim 1 and 2, it is characterized in that: described control circuit also comprises illumination sample circuit and current sampling circuit, the signal output part of described illumination sample circuit and current sampling circuit and the signal input part of microcontroller U2 electrically connect.
4. solar LED control circuit according to claim 3, it is characterized in that: described power output circuit comprises metal-oxide-semiconductor Q3, metal-oxide-semiconductor Q4, diode D3, diode D4 and inductance L 2, the grid of metal-oxide-semiconductor Q3 and the control end of microcontroller U2 electrically connect, the drain electrode of metal-oxide-semiconductor Q3 and the positive pole of storage battery electrically connect, the source electrode of metal-oxide-semiconductor Q3 and one end of inductance L 2 electrically connect, the positive pole of inductance L 2 other end and diode D3 electrically connects, the grid of metal-oxide-semiconductor Q4 and the control end electrical connection of microcontroller U2, the drain electrode of metal-oxide-semiconductor Q4 and the positive pole of diode D3 electrically connect, the source electrode of metal-oxide-semiconductor Q4 connects with the negative electricity of storage battery.
5. solar LED control circuit according to claim 3, is characterized in that: the control end of described microcontroller U2 also electrically connects with the control end of control chip U1.
6. the solar LED control circuit according to any one of claim 3-5, it is characterized in that: described solar LED control circuit also comprises voltage indicator panel, button and temperature sensor, described voltage indicator panel, button and temperature sensor electrically connect with microcontroller U2 respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310748168.6A CN104753112A (en) | 2013-12-31 | 2013-12-31 | Solar LED control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310748168.6A CN104753112A (en) | 2013-12-31 | 2013-12-31 | Solar LED control circuit |
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| Publication Number | Publication Date |
|---|---|
| CN104753112A true CN104753112A (en) | 2015-07-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310748168.6A Pending CN104753112A (en) | 2013-12-31 | 2013-12-31 | Solar LED control circuit |
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| Country | Link |
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| CN (1) | CN104753112A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106026387A (en) * | 2016-05-18 | 2016-10-12 | 东南大学 | Method for collecting maximum energy of monitoring system power supply of power transmission line of electric power grid |
| CN106793394A (en) * | 2016-12-15 | 2017-05-31 | 上海理工大学 | Highway lighting system and control method |
| CN109152150A (en) * | 2018-10-15 | 2019-01-04 | 四川长虹电器股份有限公司 | The Boost constant current output circuit and constant voltage outputting circuit of solar lighting control system |
| CN111769740A (en) * | 2020-07-07 | 2020-10-13 | 佛山职业技术学院 | MPPT charging system based on buck-boost conversion |
-
2013
- 2013-12-31 CN CN201310748168.6A patent/CN104753112A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106026387A (en) * | 2016-05-18 | 2016-10-12 | 东南大学 | Method for collecting maximum energy of monitoring system power supply of power transmission line of electric power grid |
| CN106793394A (en) * | 2016-12-15 | 2017-05-31 | 上海理工大学 | Highway lighting system and control method |
| CN109152150A (en) * | 2018-10-15 | 2019-01-04 | 四川长虹电器股份有限公司 | The Boost constant current output circuit and constant voltage outputting circuit of solar lighting control system |
| CN111769740A (en) * | 2020-07-07 | 2020-10-13 | 佛山职业技术学院 | MPPT charging system based on buck-boost conversion |
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| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150701 |
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| WD01 | Invention patent application deemed withdrawn after publication |