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The working principle of the solar street light

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The working principle of the solar street light

Release date:2014-09-09 00:00 Source: Views:

Sunlight is energy, solar street lamps use charge during the day night, without complex and expensive pipe laying, can be arbitrary adjust the layout of the lamps and lanterns, safety and energy saving no pollution, no artificial work stable and reliable operation, saving electricity maintenance free.


1. The system composition

System consists of solar battery * * * * parts (including stent), LED lamp holder, the control box (a controller, battery) and a few light pole parts; Fortunella venosa solar panels 127 wp/m2 light efficiency, high efficiency, the wind resistant design for the system is very good; With 1 w white LED lamp holder part on the printed circuit board in yellow and 1 w LED integration as a certain distance between lattice as a plane light source.

Control box body with stainless steel as the material, attractive and durable; Control box placed maintenance-free lead-acid battery discharge and charge controller. The system selects the valve-control sealed lead-acid battery, due to its little maintenance, so it is also referred to as "free maintenance batteries", is advantageous to the system maintenance, lower cost, Charge and discharge controller in the design for the functional qi for (photo, control, overcharge protection, discharge protection and reverse connect protection, etc.) and cost control, to achieve a high cost performance.



Working principle of the 2.

Working principle of the system is simple, the use of light born V effect principle of solar panels during the day to receive solar radiation and translated into electricity output, after stored in the storage battery charging and discharging controller, the night when the illumination was gradually reduced to about 10 lux, fortunella venosa solar panels around the open circuit voltage of 4.5 V, charge and discharge controller detects the voltage value of the action, the battery to discharge lamp holder. After 8.5 hours of battery discharge, charge and discharge controller action, battery discharge end of the pool. Main function is to protect the storage battery charging and discharging controller.


3. The design idea

Fortunella venosa solar street lamp design compared with general solar lighting, basic principles are the same, but the link to consider more. Here in yangzhou fortunella venosa lighting electric appliance co., LTD. The fortunella venosa solar LED high-power lamps, for example, several aspects to do analysis.

1 * * * * fortunella venosa solar cells selection

Design requirement: yangzhou region, load input voltage 24 v power consumption 34.5 W, working hours a day 8.5 h, guarantee continuous rainy days 7 days.

(1) yangzhou region nearly 20 years the average radiation 107.7 Kcal/cm2, the simple calculation of yangzhou region peak sunshine time of 3.424 h;

2 load power consumption = = 12.2 AH

(3) the total * * * * fortunella venosa solar energy charging current = 1.05 * 12.2 * present (3.424 x 0.85) = 5.9 A

Here, the design of the shortest days between two consecutive rainy days for 20 days, 1.05 * * * * fortunella venosa solar cells system, a comprehensive loss coefficient 0.85 for battery charging efficiency.

(4) fortunella venosa solar minimum total power of * * * * number = 17.2 * 17.2 = 102 w

Selects the peak power output 110 wp, single piece of 55 wp standard battery * * * *, should be able to guarantee in most cases a year of street lamp system normal operation.


4. The battery type

Solar power supply system, the battery is good or not directly affects the performance of system quality and service life of the comprehensive cost and operation, this scenario to choose our company with the Chinese academy of sciences institute of metal research and the latest achievements of energy storage type colloidal battery, compared with the ordinary lead-acid batteries, in design and manufacturing process has the following prominent features:

Service life is long, normal life for five to ten years.

Suitable for anode alloy is formula and the ratio of active material, make a battery is more suitable for the use of energy storage battery circulation charge and discharge characteristics.

The design of the gel electrolyte, effective inhibition of active material of rust and plate of the sulfuric acid salinization phenomenon, thus delaying the battery in the use of the performance in the process of failure. Greatly improve the deep filling put cycle life of the battery.

Selection was the fourth generation lighting products LED light source.

The LED light source advantage

Y high luminous efficiency, small power consumption, long service life, low working temperature.

Y safety reliability.

Y reaction speed, small unit volume, green environmental protection.

Y under the same brightness, power consumption is one over ten of the incandescent lamp, fluorescent lamp of a third, but life is 50 times of incandescent lamp, fluorescent lamp 20 times, is the incandescent lamp, fluorescent lamp, gas discharge lamp after the fourth generation of lighting products.

Y single star power super brightness LED, lighting source is LED applications across to efficient market, will be one of the greatest invention after Edison invented incandescent lamp.


5. * * * * stent battery

1) the Angle of design

To make * * * * fortunella venosa solar cells in the received solar radiation as much as possible of the year, we will make * * * * fortunella venosa solar cells select a best Angle.

About * * * * fortunella venosa solar cells question discussion, the best Angle appear in some academic journals in recent years a lot. The street lamp used for yangzhou region, on the basis of the design reference of the related literature material, selected fortunella venosa solar cells in 16 o * * * * stent Angle.

Wind-resistant design of 2)

In fortunella venosa solar street light system, the structure of a need to be very attaches great importance to the problem, the wind resistance design. Wind resistance design consists of two large, one for the battery wind resistance design for the * * * *, secondly, light pole of wind resistance design. The following according to the above two respectively for analysis. (1) * * * * stent fortunella venosa solar cells of wind resistance design

According to * * * * battery manufacturer technical parameter data, * * * * fortunella venosa solar cells can absorb the wind pressure of 2700 pa. If the wind resistance coefficient is selected for 27 m/s (the equivalent of grade ten typhoon), according to the viscous fluid mechanics, the battery * * * * of wind pressure is 365 pa. So, * * * * itself is completely can withstand 27 m/s wind speed without damage. So, the key is to consider in the design of battery * * * * stent with light pole connection.

In the design of this set of street lamp system battery * * * * stent used with light pole connection design of bolt fixed connection.

The wind resistant design for 2 lamps light pole

The parameters of the lamp is as follows:

A = 16 o panels Angle light pole height = 5 m

Delta design selection at the bottom of the lamp post weld width = = 4 mm at the bottom of the light pole diameter 168 mm

Weld surface where the light pole failure surface. The light pole failure surface resistance moment W calculation point P to the light pole by panels of action load F for the distance

PQ = [+ 5000 (5000 + 6)/tan16o] x Sin16o = 1545 mm = 1.545 m. So, the role of wind load on the light pole failure moment M = F x 1.545.

According to the design of 27 m/s maximum wind speed, the double lamp holder fortunella venosa 2 x 30 w solar street light panels of basic load of 730 n. Consider the safety factor of 1.3, F = 1.3 x 730 = 730 n.

So, M = F * 1.545 = 949 * 1.545 = 1466 n. M.

According to the mathematical deduction, circular failure surface resistance moment W = PI * (3 delta r2 + 3 r delta delta 2 + 3).

On the type, r is circle diameter, the delta is ring width.

Failure surface resistance moment W = PI * (3 delta r2 + 3 r delta delta 2 + 3)

= PI * (3 * 842 * 84 * 4 + 3 + 42 and 43) = 88768 mm3

= 88.768 x 10-6 m3

Wind loading on the damage effect torque caused by the stress = M/W

= 1466 / (88.768 x 10-6) = 16.5 x 106 pa = 16.5 Mpa < < 215 Mpa

Among them, the bending strength of 215 Mpa is Q235 steel.

So choose your weld width to meet design requirements, as long as the welding quality guaranteed, there is no question of light pole of wind resistance.


6. The controller

Fortunella venosa solar's main role is to protect the storage battery charging and discharging controller. Basic functions must have overcharge protection, discharge protection, electric, control and meter, etc.

The battery overcharge, over discharge protection voltage parameters such as table in general

1) when the battery voltage reach the set value change the state of the circuit.

On the selected device, there are currently using MCU, there are also using the comparator, the scheme is more, have their own characteristics and advantages, and should be selected corresponding scheme based on the characteristics of the demand of the customers, not a detailed here.

2) surface treatment

This series of products adopt new technology of electrostatic coating, with FP professional building materials coatings is given priority to, can satisfy the customer to the requirements of the product's surface color and the environment coordinated, and product high self-cleaning property and corrosion resistance is strong, ageing resistance, suitable for any climate environment. Processing technology on the basis of design for hot-dip zinc coating, make the product performance is greatly improved, has reached the requirement of the most stringent AAMA2605.2005, other indicators have reached or exceed the requirements of GB.


7. To summarize

Yangzhou fortunella venosa lighting electrical appliance co., LTD., independent research and development production of solar LED street lamp (electrodeless lamp), solar energy street light, solar wind complementary lamps. In the aspect of design, research and development, production of solar LED street lamp broke the solar street light three big problems (high power, the LED light failure quickly, no power output) such as the serious influence street lamp cost and efficiency problem. Greatly reduces the cost and increase the service life. Older after-sales service and quality assurance to make the promotion of solar street lamps, energy saving enterprise further development. Here is the company solar street lamp design: the overall design basically considered each link; Photovoltaic (pv) * * * * the peak wattage type selection and design of battery capacity selection design adopted at present the general design method, design more scientific; Wind resistance design from * * * * stent electric pool with two pieces of light pole do the analysis, analysis of comprehensive; Surface treatment is currently the most advanced technology in process; Street light overall structure simple and beautiful; Through actual operation each link that can match between sex is good.

At present, the initial investment cost problem of photosynthetic solar LED lighting is still a major problem in our large spread widely. However, fortunella venosa solar photosynthetic efficiency is gradually improved, and the price will be gathering, same cities LED lights in rapidly improve, but the price lower. And fortunella venosa solar renewable, clean pollution-free, and LED the environmental protection and energy saving, compared to the conventional fossil energy increasingly nervous, and after use will cause the increasingly serious pollution to the environment. So, as a kind of burgeoning fortunella venosa solar LED lighting outdoor lighting, show we will be boundless vitality and broad prospects.

Solar street light:

Solar street light configuration in the design of the conventional calculation

As the traditional energy increasingly scarce, the application of solar energy will be more and more widely, especially solar power areas in a short span of few years has developed into a mature sunrise industry.

1: currently, restrict the application of solar power is one of the most important part of the price, with a light dual solar street lights, for example, two road load sharing is 60 watt, (effective illumination in the middle and lower reaches of the Yangtze river area 4.5 h/day, 7 hours each night discharge, calculate the panels to 20% increase in reserve) the panels will need to about 160 w, 30 yuan per watt calculation, the cost of the panels will be 4800 yuan, plus 180 ah battery costs are at around 1800, the whole street to invest cost and much higher than the mains street lamp, caused a major bottleneck in the field of solar street light applications.

2: the service life of the battery should also consider in the whole street lamp system application, usually the battery warranty of three years or five years, but the general battery in one year or even half a year later will be in charge of discontent, some actual charge rate may fall to about 50%, it will affect the normal continuous rainy period of night lighting, so choose a good battery is especially important.

3: some project traders often choose LED lights for solar street lighting, but the quality of the LED lights layer is poor, serious LED light failure could light attenuation 50% half a year. So be sure to choose the droop slower LED lights, or choose electrodeless lamp, low voltage sodium lamp, etc.

4: the choice of the controller is often overlooked by engineering contractor of a problem, the quality of the controller layer is poor not neat, 12 v / 10 a controller market prices in 200-300 yuan, although the whole street lamp system is the least value of parts, but it is a very important link. Controller is good or bad will directly affect the solar street light system * * * * life as well as the purchase cost of the whole system, one: should choose low power consumption control, the controller working 24 hours a day, as their power consumption is bigger, will be part of the electricity consumption, had better choose power under 1 MA (MA) controller. 2: choose a controller of high charging efficiency and charging with MCT model of maximum current controller can automatically track panels, especially in winter or insufficient lighting, MCT charging mode efficiency is about 20% higher than the other. Three: should choose to have two way to adjust power controller, adjust the power controller has been widely promotion, deserted in the night time can be automatically shut down all the way or two way lighting, save electricity, can also LED lights for power regulation. In addition to select the saving function, but also should pay attention to the controller to the * * * * such as battery protection function, as has a trickle charge mode controller can very good protection batteries, increase the service life of battery, the other set controller under-voltage protection value, as far as possible the under-voltage protection value in 11.1 V or higher, to prevent the battery discharge.

5: far away from downtown should also pay attention to the security work, a lot of construction engineering contractor for negligence, not effectively guard against theft, lead to battery, panels, such as * * * * stolen, not only affects the normal lighting, also creates unnecessary damage to property. At present mostly in the engineering case stolen for the battery, battery buried in concrete pouring is an effective security measures, on the light pole with reinforced by welding battery box of the best.

6: waterproof of the controller, controller is generally installed in the lampshade, battery box, generally do not water, but in the actual engineering case controller connecting terminal of often because of the rain down the cable into the controller caused by short circuit. So when construction should pay attention to the internal cable bent into a "U" type and fixed type, external connections can also be fixed as the "U" type, so the rain will not be able to pour into the controller caused by short circuit, it also can be applied waterproof glue, perimeter joints.

7: in many practical applications, the solar street lamps in many parts of the solar street light can't meet the needs of the normal lighting, especially in the rainy day is more outstanding, in addition to the use of poor quality related to * * * *, another is the main reason is just * * * * to reduce costs, no configuration is designed according to the demand, reduce the use standard panels and batteries, so in a rainy day street lamp lighting can not be provided. The following provide solar panels and battery configuration calculation and type:

A: first to calculate the current:

Such as: the 12 v battery system; 2 only 30 w lamp, a total of 60 watts.

Present current = 60 w 12 v = 5 A

2: calculate the battery capacity requirements:

Such as: the street lamp lighting of accumulative total of every night time need 7 hours to full load (h);

(such as 8:00 open at night, night 11:30 close road 1, at 4:30 in the morning to open 2 road, closed at 5:30 in the morning)

Need to meet the lighting needs of continuous rainy day 5 days. (plus 5 days before the rainy night lighting, 6 days)

Battery = 5 a * 7 h * day (5 + 1) = 5 a * 42 h = 210 AH

In addition to prevent the battery charge and discharge, battery charge in general to around 90%; Discharge remaining 20% or so.

So 210 ah is used in about 70% of the real standard.

3: calculate the panels of the peak demand (WP) :

Street lamp lighting of accumulative total of every night time need for 7 hours (h);

U: panels accept effective illumination time is 4.5 hours a day on average (h);

The reserved amount of at least 20% ease demand for panels.

WP present 17.4 V = (5 a * 7 h * 120%) present 4.5 h

WP present 17.4 V = 9.33

WP = 162 (W)

U: 4.5 h light time each day for the middle and lower reaches of the Yangtze river region near the sun coefficient.

In the * * * * in solar street lamps, line loss, the wastage of the controller, and power consumption of the ballast or constant current source is different, practical application may be around 5% to 25%. So is the theoretical value of 162 w, according to the actual situation to increase.

Solar street light plan:

Related to * * * * choice:

24 vled: choose LED lighting, LED lighting service life is long, soft light, the price is reasonable, can achieve power regulation was deserted at night time, is beneficial to saving electricity, which can reduce the configuration panels, cost savings. Around 80-105 lm per watt, droop in less than 5% or less;

The 12 v battery (string of 24 v) : choose lead-acid maintenance-free batteries, moderate price, stable performance and the preferred solar street lamps;

12 v panels (string of 24 v) : conversion rate more than 15% of the single crystal feature;

24 v controller: MCT charging ways, with power function;

6 m light pole (mainly in modelling beautiful, durable, price is cheap)

A, 40 watts alternative configurations (normal)

1, LED lights, single-channel, 40 w, 24 v system;

2, the local average effective illumination in 4 h calculation;

3, 10 hours, the daily discharge time (5 PM to 7 PM - morning, for example)

4, meet the continuous rainy days (5 days plus rainy night before electricity, 6 days).

Current present 24 v = 40 w = 1.67 A

Calculation of battery = 1.67 A x 10 h x (5 + 1) day

= 1.67 A x 60 h = 100 AH

20% reserve battery charge and discharge capacity; Street light of the actual current above 2 a (plus 20%

Loss, including the constant current source, line loss, etc.)

Actual demand = 100 ah battery and 20% reserve capacity, plus 20% loss

100 ah present 80% * 120% = 150 ah

Actually for 24 v / 150 ah battery, need two sets of 12 v battery total: 300 ah

Calculation of panels:

1, 40 w leds, current: 1.67 A

2, 10 hours daily discharge time (5 PM to 7 PM - morning, for example)

3, panels set aside at least 20%

4, effective local illumination will be calculated per 4 h

WP present 17.4 V = (1.67 A x 10 h x 120%) present 4 h

WP = 87 w

The actual loss of constant current source, line loss and other comprehensive loss at around 20%

Panels actual demand = 87 w * 120% = 104 w

Actual panels should be 24 v / 104 w, so I need two pieces of panels, a total of 12 v, 208 w

Comprehensive * * * * price: positive panels, 208 w, 38 yuan/watt, 7904 yuan

300 AH battery, 12 yuan/AH meter: 3600 yuan

40 w leds: meter: 2250 yuan

Controller () 250 yuan only

6 m light pole 1200 yuan

This set of * * * * total: RMB 15204

2, 40 watts alternative configuration 2 (with adjusting power)

1, LED lights, single-channel, 40 w, 24 v system.

2, the local average effective illumination to 4 h,

3, 10 hours, the daily discharge time (5 PM to 7 PM - morning, for example) at night by the controller

Period of time to adjust the LED power, reduce the power consumption of the total, and the actual calculated at discharge in 7 hours a day.

(example: 100% power 7 PM to 11 PM, at 5 a.m. to 11 o 'clock at 50% power. Total: 7 h)

(example 2:7:00-100% at 10:30, 10:30-4:30 is 50%, at 4:30-5:00 to 100%)

4, meet the continuous rainy days (5 days plus rainy night before electricity, 6 days).

Current = 40 w present 24 v

= 1.67 A

The battery = 1.67 A * 7 h * (5 + 1) days

A * 42 h = 1.67

= 70 AH

20% reserve battery charge and discharge capacity; Street light of the actual current above 2 a (plus 20%

Loss, including the constant current source, line loss, etc.)

Actual demand = 70 ah battery and 20% reserve capacity, plus 20% loss

70 ah present 80% * 120% = 105 ah

Actually for 24 v / 105 ah battery, need two sets of 12 v battery total: 210 ah

Calculation of panels:

1, 40 w leds, current: 1.67 A

2, 10 hours daily discharge time, and the work after the actual calculated at 7 hours (adjustable power up battery)

3, panels set aside at least 20%

4, effective local illumination will be calculated per 4 h

WP present 17.4 V = (1.67 A x 7 h x 120%) present 4 h

WP = 61 w

The actual loss of constant current source, line loss and other comprehensive loss at around 20%

Panels actual demand = 61 w * 120% = 73 w

Actual panels should be 24 v / 73 w, so I need two pieces of panels, a total of 12 v, 146 w

Comprehensive * * * * price: positive panels, 146 w,

210 ah battery

40 w leds:

Controller (only)

6 m light pole

Three, 40 watts alternatives (with regulation power, with constant current)

Used with constant current, constant voltage, power controller to reduce the system power consumption, to reduce the cost of * * * *.

(the actual reduce the loss of the system total 20%, the following in terms of 15%)

1, LED lights, single-channel, 40 w, 24 v system.

2, the local average effective illumination to 4 h,

3, 10 hours, the daily discharge time (5 PM to 7 PM - morning, for example) at night by the controller

Period of time to adjust the LED power, reduce the power consumption of the total, and the actual calculated at discharge in 7 hours a day.

(example: 100% power 7 PM to 11 PM, at 5 a.m. to 11 o 'clock at 50% power. Total: 7 h)

(example 2:7:00-100% at 10:30, 10:30-4:30 is 50%, at 4:30-5:00 to 100%)

4, meet the continuous rainy days (5 days plus rainy night before electricity, 6 days).

Current = 40 w present 24 v

= 1.67 A

The battery = 1.67 A * 7 h * (5 + 1) days

A * 42 h = 1.67

= 70 AH

20% reserve battery charge and discharge capacity; Street light of the actual current is less than 1.75 A (plus 5%

Line loss, etc.)

Actual demand = 70 ah battery and 20% reserve capacity, plus 5% loss

70 ah present 80% * 105% = 92 ah

Actually for 24 v / 92 ah battery, need two sets of 12 v battery total: 184 ah

Calculation of panels:

1, 40 w leds, current: 1.67 A

2, 10 hours daily discharge time, the actual calculated on 7 hours (adjustable work up battery)

3, panels set aside at least 20%

4, effective local illumination will be calculated per 4 h

WP present 17.4 V = (1.67 A x 7 h x 120%) present 4 h

WP = 61 w

The actual line loss and other comprehensive loss less than 5%

Panels actual demand = 122 w * 105% = 64 w

Actual panels should be 24 v / 64 w, so I need two pieces of panels, a total of 12 v, 128 w

Comprehensive * * * * price: positive panels 128 w

184 ah battery,

40 w leds

Controller (only)

6 m light pole


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