CN101078485A - Method for promoting large power LED solar energy road lamp efficiency - Google Patents
Method for promoting large power LED solar energy road lamp efficiency Download PDFInfo
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- CN101078485A CN101078485A CNA2007100234644A CN200710023464A CN101078485A CN 101078485 A CN101078485 A CN 101078485A CN A2007100234644 A CNA2007100234644 A CN A2007100234644A CN 200710023464 A CN200710023464 A CN 200710023464A CN 101078485 A CN101078485 A CN 101078485A
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- led
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- lamp
- solar energy
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/72—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps in street lighting
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- Circuit Arrangement For Electric Light Sources In General (AREA)
Abstract
The invention discloses a method for improving light efficiency of LED solar street lamp with big power. Solar battery module is connected with controller and the storage battery stores electricity by the controller. A driving circuit is set between the storage battery and the LED lamp. The storage battery transports electricity to LED lamp. The working current of driving circuit is less than the rating current of LED so that LED lamp with unsaturated working current emits light and it matches with the driving circuit in voltage. One or more LED is connected with the original LED in series in LED street lamps. The invention improves the light efficiency of solar street lamp by decreasing LED working current and at the same time the utilization ratio of electricity can be improved to more than 49%.
Description
Technical field
The present invention relates to the solar street light of white great power LED, particularly improve the method for its light efficiency as light source.
Background technology
Rapid with white great power LED (being called for short LED) as the solar street light development in these 2 years of light source, this mainly has benefited from long-life and the high light efficiency of LED, its structure is to connect controller by solar module, and battery also can be to LED light fixture transmission of electric energy by the controller reserve power.
At present, the drive circuit between LED light fixture and battery, typical circuit mainly contain three kinds: one is to use the current-limiting resistance circuit; Two are to use constant-current circuit; Three are to use the DC/DC booster circuit, some power consumption of sort circuit is on current-limiting resistance or constant-current circuit, preceding two kinds of circuit to the utilization rate of electric energy between 80～85%, the third circuit depends on the efficient (generally between 80～90%) of DC/DC booster circuit to the utilization rate of electric energy, in a word, three kinds of circuit to the utilization rate of electric energy between 80～90%, very not high.
On the other hand, each manufacturer that produces the LED Solar lamp is all thought: as long as buy the cost that the LED of high-luminous-efficiency just can reduce light fixture, true in fact really not so, because led light source accounts for about 6% of whole lamp assembly basis, and solar module and battery account for about 75% of whole lamp assembly basis, and the LED that buys high-luminous-efficiency thus is very little to the reduction influence of light fixture cost.
LED solar energy lamp weak point in design mainly shows three aspects in the market: the one, do not improve the luminous efficiency that has LED now at the characteristic design of LED; The 2nd, do not take into full account the coupling between LED and the battery, cause the utilization rate of electric energy in the battery not high; The 3rd, thereby less than the cost that reaches the whole light fixture of final reduction by the consumption cost that reduces solar cell and battery significantly.
Summary of the invention
The present invention provides a kind of method that improves large power LED solar energy road lamp efficiency for overcoming the deficiencies in the prior art, thereby this method can improve the power of solar cell and the capacity of battery reaches the purpose that reduces cost.
Technical scheme of the present invention is: connect controller by solar module, battery is by the controller reserve power, between battery and LED light fixture, connect a drive circuit, battery is to LED light fixture transmission of electric energy, the operating current of drive circuit makes the LED street lamp luminous with unsaturated operating current less than the rated current of LED.
Be complementary with the voltage of described drive circuit, in the LED street lamp, increase by one or many LED and connect with original LED.
The present invention improves the light efficiency of solar street light by the operating current that reduces LED, and the utilization rate of electric energy is brought up to more than 94% simultaneously.
Description of drawings
Below in conjunction with the drawings and specific embodiments the present invention is described in further detail.
Fig. 1 is that structure of the present invention connects block diagram.
The specific embodiment:
As shown in Figure 1, solar module, battery and LED light fixture are connected controller respectively, battery is by the controller reserve power, there is a drive circuit to connect battery and LED light fixture in controller inside, solar cell is stored in the battery after the energy of sunshine is changed into electric energy by day, night, battery discharged electric energy to the led light source power supply, had several LED to be connected on the drive circuit in the LED light fixture.
Prior art is: if the luminous flux of LED solar street light output is certain, LED power and its light efficiency relation of being inversely proportional to, be that the high more required power of light efficiency is more little, the electric energy that consumes is also few more, present non-linear ascendant trend owing to obtain of the minimizing of LED luminous efficiency by test again with its operating current, so the present invention is when design, the voltage of described drive circuit is designed to matching value, LED is used under the state of unsaturated operating current, again in conjunction with the voltage of battery, so just can in the LED street lamp, correspondingly increase by one or many LED and connect with original LED, this method will make LED solar street light cost minimum, because in the LED solar street light, led light source accounts for about 6% of totle drilling cost, and solar cell and battery account for about 75% of totle drilling cost, the raising of LED luminous efficiency can make the power of solar cell and the capacity of battery decline to a great extent, under the prerequisite that guarantees LED solar street light output same light flux, the configuration requirement of solar cell and battery depends on luminous efficiency rather than the high-high brightness of LED, that is to say, require down according to the luminous flux of setting lamp, by increasing the cost input that LED quantity improves illumination section, improve the light efficiency of light fixture in the mode of unsaturated operating current, thereby reach the purpose that requires to reduce significantly under the prerequisite solar cell and the configuration of battery departmental cost on an equal basis, finally reduce the cost of product.For example: export the solar street light of 1000 lumens, if it needs 120 watts of solar cells and 150AH/12V battery when adopting the operate in saturation electric current; It needs 100 watts of solar cells and 120AH/12V battery when adopting unsaturated operating current then; Though the cost of led light source will increase (is original 2～3 times LED approximately because will use) this moment; The LED cost was upgraded to 10～20% by accounting for totle drilling cost 3～8% originally, and solar cell and battery can reduce to 45～55% from totle drilling cost 65～75%, and totle drilling cost still descends after the value added of deduction LED cost.
Embodiment: with the luminous efficiency that is applied in 1 watt of LED on the LED solar street light is example, battery tension is 12V in the sense circuit, if operate in saturation electric current 350mA work with LED, the forward voltage drop of LED is about 3.5V so, 3 LED can only connect in drive circuit this moment, the forward voltage drop of LED after the series connection is 10.5V, and as seen some power consumption is on circuit.The present invention is designed to 3V with the forward voltage drop of LED, 12V battery 4 LED that just can connect so, and the utilization rate of electric energy is just brought up to more than 94% like this.According to the C-V characteristic of LED as can be known: the forward voltage drop of LED is along with the minimizing of operating current descends, just can make the forward voltage drop of LED equal 3V so reduce the operating current of LED, so just, 4 LED can connect, and the forward operating current LED that forward voltage equals 3V when being 350mA also do not have on market at present, so present embodiment can realize easily that with unsaturated operating current forward voltage equals this requirement of 3V.
Other embodiments of the invention are: when the voltage of battery is 24V, 36V ... the time, LED is with unsaturated operating current work, and the LED that connects in the circuit is just corresponding to accelerate.
Claims (2)
1. method that improves large power LED solar energy road lamp efficiency, connect controller by solar module, battery is by the controller reserve power, between battery and LED light fixture, connect a drive circuit, battery is to LED light fixture transmission of electric energy, it is characterized in that: the operating current of drive circuit makes the LED street lamp luminous with unsaturated operating current less than the rated current of LED.
2. the method for raising large power LED solar energy road lamp efficiency according to claim 1 is characterized in that: be complementary with the voltage of described drive circuit, increase by one or many LED and connect with original LED in the LED street lamp.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007100234644A CN101078485A (en) | 2007-06-05 | 2007-06-05 | Method for promoting large power LED solar energy road lamp efficiency |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007100234644A CN101078485A (en) | 2007-06-05 | 2007-06-05 | Method for promoting large power LED solar energy road lamp efficiency |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101078485A true CN101078485A (en) | 2007-11-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2007100234644A Pending CN101078485A (en) | 2007-06-05 | 2007-06-05 | Method for promoting large power LED solar energy road lamp efficiency |
Country Status (1)
| Country | Link |
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| CN (1) | CN101078485A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102635828A (en) * | 2012-03-23 | 2012-08-15 | 珠海市洁源电器有限公司 | Solar LED (light emitting diode) lamp |
| CN105276510A (en) * | 2014-07-09 | 2016-01-27 | 常州市万隆节能交通科技有限公司 | Solar stand column type non-off colored lamp for guardrail of urban bridge or landscape or road |
| CN111969950A (en) * | 2020-08-05 | 2020-11-20 | 中国铁塔股份有限公司 | Photovoltaic power supply system operation state detection method and device and terminal |
-
2007
- 2007-06-05 CN CNA2007100234644A patent/CN101078485A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102635828A (en) * | 2012-03-23 | 2012-08-15 | 珠海市洁源电器有限公司 | Solar LED (light emitting diode) lamp |
| CN105276510A (en) * | 2014-07-09 | 2016-01-27 | 常州市万隆节能交通科技有限公司 | Solar stand column type non-off colored lamp for guardrail of urban bridge or landscape or road |
| CN111969950A (en) * | 2020-08-05 | 2020-11-20 | 中国铁塔股份有限公司 | Photovoltaic power supply system operation state detection method and device and terminal |
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Open date: 20071128 |