CN202488834U

CN202488834U - Led solar energy lawn lamp

Info

Publication number: CN202488834U
Application number: CN2012200682539U
Authority: CN
Inventors: 黄天清
Original assignee: XIAMEN SEALITE CO Ltd
Current assignee: XIAMEN SEALITE CO Ltd
Priority date: 2012-02-28
Filing date: 2012-02-28
Publication date: 2012-10-10
Anticipated expiration: 2022-02-28

Abstract

The utility model discloses an LED solar energy lawn lamp. The solar energy lawn lamp comprises a solar battery pack, an anti-counter-charging and anti-over-charging circuit, a charging controller, a light-operated switch, an over-discharging control circuit, a discharging controller, a storage battery and an LED lamp, wherein the solar battery pack and the storage battery are connected to the charging controller through the anti-counter-charging and the anti-over-charging circuit; the output end of the charging controller is respectively connected to the storage battery and the discharging controller; the output end of the storage battery is respectively connected to the both input ends of the over-discharging control circuit and the discharging controller; and the output end of the discharging controller is connected to the LED lamp. According to the utility model, the LED solar energy lawn lamp comprises the anti-counter-charging and anti-over-charging circuit, the charging controller, the light-operated switch, the over-discharging control circuit, the discharging controller and the like and can effectively control the charging and the discharging of the storage battery, so that the phenomena of over-charging and over-discharging of the storage battery are avoided, and accordingly, the service life of the storage battery is prolonged.

Description

The LED solar lawn lamp

Technical field

The utility model relates to a kind of light fixture, particularly relates to a kind of LED solar lawn lamp.

Background technology The design of Lawn lamp is that the urban green space view increases safety with beautiful with external form and soft light mainly; And generally have easy for installation, ornamental characteristics such as strong, can be used for park, garden villa, square greening, etc. the decorative lighting of greenbelt in place.The existing solar lawn lamp IC that boosts can be automatically switch charging and discharge behavior.When daytime, solar charging panel was sensed sunlight, automatically switch to and close light and get into charged state, when the dim light of night comes the solar charging panel induction during less than sunlight, get into battery discharge status and open light and automatically switch to.But existing solar lawn lamp exists the insufficient sensitivity of sensitization, the defective that storage battery damages easily.

The utility model content

The purpose of the utility model is to provide a kind of LED solar lawn lamp of storage battery long service life.

For realizing above-mentioned purpose, the technical solution of the utility model is:

The utility model is a kind of LED solar lawn lamp, and it comprises that solar battery group, counnter attack are filled and overcharges circuit, charge controller, light-operated switch, crosses and put control circuit, discharge controller, storage battery and LED lamp; Described solar battery group and storage battery fill through counnter attack and overcharge circuit and be connected charge controller; The output of charge controller connects storage battery and discharge controller respectively; The output of storage battery connected the input of putting control circuit and discharge controller respectively, and the output of discharge controller connects the LED lamp.

After adopting such scheme; Because the utility model comprises that counnter attack is filled and overcharges circuit, charge controller, light-operated switch, crosses and put circuit such as control circuit, discharge controller; Can effectively control the charging and the discharge of storage battery; Avoid storage battery to occur overcharging or cross putting phenomenon, make the storage battery long service life.The utility model select for use LED as light source, the LED life-span is long, can reach more than 100000 hours, operating voltage is low, is fit to very much be applied on the solar lawn lamp.Particularly the LED technology has experienced its crucial breakthrough, and its characteristic improves a lot in 5 years in the past, and its ratio of performance to price also is greatly improved.In addition, LED is by low-voltage DC supply, and its light source control cost is low, makes the adjusting light and shade, and frequent switch all becomes possibility, and can not produce harmful effect to the performance of LED.Can also control color easily, change the distribution of light, produce dynamic illusion, so its particularly suitable is on solar lawn lamp.

Below in conjunction with accompanying drawing and specific embodiment the utility model is further described.

Description of drawings

Fig. 1 is the circuit block diagram of the utility model;

Fig. 2 is the circuit theory diagrams of the utility model.

Embodiment

Like Fig. 1, shown in Figure 2, the utility model is a kind of LED solar lawn lamp, and it comprises that solar battery group 1, counnter attack are filled and overcharges circuit 2, charge controller 3, light-operated switch 4, crosses and put control circuit 5, discharge controller 6, storage battery 7 and LED lamp 8.

Described solar battery group 1 and storage battery 7 fill through counnter attack and overcharge circuit 2 and be connected charge controller 3; The output of charge controller 3 connects storage battery 7 and discharge controller 6 respectively; The output of storage battery 7 connected the input of putting control circuit 5 and discharge controller 6 respectively, and the output of discharge controller 6 connects LED lamp 8.

The operation principle of the utility model:

As shown in Figure 2, VT ₃, VT ₄, L, C ₁And R ₅The common discharge controller 6 of forming is owing to C ₁Positive feedback effect, circuit produces vibration, VT ₄Switch as booster circuit uses.Figure is depicted as the circuit of the equivalence of the part of boosting.VT ₄Voltage on the base stage is pulse control voltage, works as VT ₄Base stage when being high level, VT ₄Saturation conduction, the electric current through boost inductor L flows through VT ₄Turn back to the storage battery negative terminal and form the loop.Because the electric current among the L can not suddenly change, just rise gradually, electrical power storage is in inductance L.In this process, not conducting of LED.Work as VT ₄Base stage when being low level, VT ₄End, its electric current vanishing at once, but the electric current in the inductance L can not suddenly change, the L energy stored discharges, and makes the LED conducting, and the electric current through L reduces gradually.According to electromagnetic induction principle, the induced electromotive force that L produced is: e _L=-L (di/dt), this induced electromotive force are added on the storage battery, make the voltage on the LED equal voltage (12V) and induced electromotive force sum, i.e. V. on the storage battery _LED=V _In+ e _L

VT ₁And VT ₂Form light-operated switch 4.Early stage solar lawn lamp adopts photo resistance, and in fact solar cell is exactly a kind of extraordinary light sensor.For the system of 1.5V, when the voltage on the solar cell was lower than 1V, illumination was about 151x, VT ₁End, and VT ₂Conducting.VT ₃Pass through R ₄Get into the amplification region, the circuit starting oscillation, LED is luminous.When natural lighting after daybreak strengthened, the voltage on the solar cell was higher than 1V, VT ₁Conducting, VT ₂End VT ₃End simultaneously, the circuit failure of oscillations, LED extinguishes.Resistance R ₂Be a critical elements in the circuit, can adjust the time of switch lamp through it, this is very important for the solar cell of consistency difference under the low light level.

Diode VD in the circuit ₁Constituting described counnter attack and fill and overcharge circuit 2, is that storage battery is provided with to the solar cell reverse charge when preventing that voltage on the storage battery is higher than solar array voltage, to avoid solar cell and battery damage.VD ₁Should select for use forward drop only to be about the Schottky diode of 0.3V.

Present most of solar lawn lamps discharged and recharged a clear regularity, promptly be charging on the same day basically, just used up the electric energy that stores the same day.Average light application time according to the power of solar cell, battery capacity, bearing power, solar lawn placement location through reasonable computation, can prevent overcharge of a battery fully.

The utility model has adopted the storage battery 7 of a joint 1.5V.No matter area is much owing to monolithic solar cell, and its operating voltage also has only 0.48V.Battery tension is very low, can make the corresponding reduction of voltage of solar cell, and the solar battery sheet of being connected is also just few more, and this is very favourable to simplifying technology, reducing cost.When adopting the series connection of more piece storage battery, very high to the coherence request of each storage battery.If be cascaded the storage battery that differs greatly, batteries will soon be damaged, and this reliability to system all is disadvantageous with reducing cost.1.5V nickel-hydrogen accumulator or the over point of cadmium-nickel storage cell all be 1V, that is to say that system must just quit work at 1V (being the failure of oscillations), so the storage battery of single-unit 1.5V is the first-selection of solar LED Lawn lamp.Under the situation of off-capacity, would rather adopt the parallel connection of more piece storage battery, do not adopt series system yet.

With regard to the failure of oscillations, at this moment storage battery has been overdischarge at 0.7-1.8V, and the life of storage battery is shortened.If at VT ₃Diode VD of emitter series connection ₂, will make VT ₃The voltage that gets into the amplification region increases 0.2V approximately, thereby whole system is just quit work at 1V.Because VD ₂The electric current that passes through is very little, and voltage drop is also just very low.Under normal conditions, the forward voltage drop of germanium diode is about 0.3V, and the forward voltage drop of silicon diode is about 0.65V; All be meant the voltage drop under rated current; If the current ratio load current value is little, pressure drop does not just have such big, and this is the unique distinction of the utility model.

The above; Be merely the utility model preferred embodiment; So can not limit the scope that the utility model is implemented with this, the equivalence of promptly doing according to the utility model claim and description changes and modifies, and all should still belong in the scope that the utility model patent contains.

Claims

1. LED solar lawn lamp is characterized in that: it comprises that solar battery group, counnter attack are filled and overcharges circuit, charge controller, light-operated switch, crosses and put control circuit, discharge controller, storage battery and LED lamp; Described solar battery group and storage battery fill through counnter attack and overcharge circuit and be connected charge controller; The output of charge controller connects storage battery and discharge controller respectively; The output of storage battery connected the input of putting control circuit and discharge controller respectively, and the output of discharge controller connects the LED lamp.