Solar street light technical parameters

Solar street light uses sunlight as energy source. During the day, Beijing Tianzhu Solar Panel charges the battery. At night, the battery supplies power to the load. No complicated and expensive pipeline laying is required. The layout of the lamp can be adjusted freely. Safety, energy, pollution-free, and manual operation are not required. Reliable, save electricity and maintenance-free.

1 system composition

The system consists of solar cell components (including brackets), LED lamp holders, solar lamp controllers, storage batteries (including battery insulation boxes) and lamp posts, etc.; Shengshi Optics Valley Solar specializes in the production of solar street lamps.

Shengshiguanggu solar modules generally use monocrystalline silicon or polycrystalline silicon solar battery modules; LED lamp heads generally use high-power LED light sources; controllers are generally placed in the light poles, with light control, time control, overcharge and over-discharge protection and reverse connection Protection, more advanced controller also has four seasons to adjust the lighting time function, half power function, smart charging and discharging functions; storage batteries are generally placed in the ground or there will be a dedicated battery insulation box, valve-regulated lead-acid batteries, Colloidal batteries, iron-aluminum batteries, or lithium batteries. The solar lamp works fully automatically and no trenching wiring is required, but the lamp pole needs to be installed on the embedded part (concrete base).

2 How it works

Shengshiguanggu solar street lamp can guarantee overcast weather for more than 15 days. The principle of system operation is simple. The solar battery daytime panel made by using the photovoltaic effect principle receives solar radiation energy and converts it into electricity output, and is stored in the battery after the charge and discharge controller. At night, when the illuminance gradually decreased to about 10 lux, and the open voltage of the Beijing Tianzhu Solar Panel was about 4.5V, the charge-discharge controller detected this voltage and then the battery was discharged to the lamp holder. After the battery was discharged for 8.5 hours, the charge-discharge controller was actuated and the battery was discharged. The main function of the charge and discharge controller is to protect the battery.

3 design ideas

1, solar cell module selection

Design requirements: Beijing area, load input voltage 24V power consumption 34.5W, working hours per day 8.5h, to ensure continuous rainy days 7 days.

(1) The average annual radiation dose in Beijing in the past two decades is 107.7 Kcal/cm2. The simple calculation of peak sunshine hours in Beijing is about 3.424h;

(2) Daily power consumption of load = 12.2AH

(3) Total charge current of required solar modules = 1.05 x 12.2 x (20 + 7) x 20 x (3.424 x 0.85) = 5.9 A

Here, the shortest days between two consecutive rainy days is 20 days. 1.05 is the comprehensive loss factor of the solar module system, and 0.85 is the battery charging efficiency.

(4) The minimum total power of the solar module = 17.2 × 5.9 = 102W The standard battery pack with a peak output power of 110Wp and a single 55Wp should be able to ensure normal operation of the streetlight system in most cases in one year. Product parameters

*Main body material: Lamp post is all-steel structure, whole hot-dip galvanizing/spray treatment

*Solar Modules: Crystalline Silicon 15-80WP (Load Configuration)

* System operating voltage: DC 12V-24V

*Controller:Solar light fixture controller, light control + time control, intelligent control (dark light self-opening, day light self-extinguish)

* Energy storage battery: fully enclosed maintenance-free lead-acid battery 12V17Ah-80Ah (according to load configuration)

* Light source type: Energy-saving high-power integrated LED, rare-earth high-efficiency energy-saving lamp (configurable according to customer requirements)

* Protection level: IP65

* Use temperature: -30 degrees to 70 degrees, wind resistance ≥ 150Km/h

* Lighting time: 4 to 14 hours (can be adjusted as needed)

* Lamp pole height: 2 meters to 4 meters (can be made according to customer requirements)

* Rainy weather guarantee: 4~5 rainy days can be worked continuously (different in different regions/seasons) (according to customer requirements)

This product does not require the laying of underground cables and does not need to pay for lighting power. The solar panels, solar DC lamps intelligent controllers, maintenance-free storage batteries, and lighting fixtures used in solar garden lights have been certified by the National Development and Reform Commission/GEF/World Bank. . It is mainly applicable to lighting lighting in urban roads, community squares, industrial parks, tourist attractions, park green belts and other places.

All our products are strictly in accordance with the standards of material inspection, process inspections, finished product shipment inspection to ensure that customers receive satisfactory products, the company built a complete pre-sale, sales, after-sales service system, for your For the sake of benefits, truly one-on-one service.

4 battery selection

In the solar power supply system, the performance of the battery directly affects the overall cost, operation, and service life of the system. In this solution, the latest results of energy storage colloidal batteries jointly developed by our company and the Institute of Metal Research, Chinese Academy of Sciences are used. Compared with lead-acid batteries, it has the following outstanding features in terms of design and manufacturing process:

The service life is long and the service life is normally five to ten years.

The use of suitable positive and negative alloy alloy formulations and active material ratios makes the battery more suitable for the use of energy storage battery cycle charge and discharge characteristics.

The design of the colloidal electrolyte effectively inhibits the de-rusting of the active material and the sulfation of the plate, thereby delaying the degradation of the battery during use. Greatly improved the battery's deep charge and discharge cycle life. Select the four generations of LED lighting products. LED light source advantages

1. High luminous efficiency, low power consumption, long service life, low operating temperature.

2. Safe and reliable.

3. Fast response, small unit size, green and environmental protection.

4. At the same brightness, the power consumption is one-tenth that of incandescent lamps, one-third of fluorescent lamps, and the lifetime is 50 times that of incandescent lamps, and 20 times that of fluorescent lamps, after incandescent lamps, fluorescent lamps, and gas discharge lamps. The fourth generation of lighting products.

5. The advent of single high-power super-brightness LED is possible in the LED application field across the high-efficiency lighting source market, and will be one of the greatest inventions after Edison invented the incandescent lamp.

5 Battery pack bracket

1) Dip design

In order to allow solar modules to receive as much solar radiation energy as possible during the year, we must choose the best angle of inclination for the solar module.

The discussion of the best dip angle of solar cell modules has appeared in many academic journals in recent years. The area where the streetlights are used is Changsha. According to the data in this design reference related literature, the selected solar cell module bracket inclination is 16o.

2) Wind resistance design

In the solar street light system, one of the most important issues in the structure is wind resistance design. The wind resistance design is mainly divided into two major blocks, one is the wind-resistant design of the battery module bracket, and the other is the wind-resistant design of the light pole. According to the above two separate analysis.

(1) Wind resistance design of solar cell module bracket

According to the technical parameters of the battery module manufacturers, the solar battery module can withstand wind pressure of 2700Pa. If the wind resistance coefficient is chosen to be 27m/s (equivalent to a tenth-class typhoon), the wind pressure on the battery module is only 365Pa based on the non-viscous fluid mechanics. Therefore, the assembly itself can withstand wind speeds of 27m/s without damage. Therefore, the key consideration in the design is the connection of the battery module bracket and the lamp post.

In the design of the street lamp system, the connection design of the battery assembly bracket and the lamp post is fixedly connected using a bolt rod.

(2) Wind resistance design of street light poles

The parameters of the street lamp are as follows:

Panel angle A=16o pole height=5m

The design selects the bottom of the lamp post and the width of the weld δ=4mm The outer diameter of the bottom of the lamp pole=168mm

The surface of the weld is the damage surface of the pole. The distance between the calculation point P of the pole damage surface resisting the moment W and the effect of the battery panel load F acting on the pole is

PQ=[5000+(168+6)/tan16o]*Sin16o=1545mm=1.545m. Therefore, the moment of action of the wind load on the damage surface of the pole is M=F×1.545.

According to the design maximum allowable wind speed of 27m/s, the basic load of the 2×30W dual-lamp solar street lamp panel is 730N. Consider the safety factor of 1.3, F=1.3×730=949N.

Therefore, M=F×1.545=949×1.545=1466 N.m.

According to the mathematical derivation, the resistance moment of the circular ring failure surface is W=π×(3r2δ+3rδ2+δ3).

In the above equation, r is the inner diameter of the ring and δ is the width of the ring.

Destruction surface resistance moment W=π×(3r2δ+3rδ2+δ3)

=π×(3×842×4+3×84×42+43)=88768mm3

=88.768×10-6m3

Stress due to wind load on the failure surface = M/W

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

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

Therefore, the width of the weld to be selected satisfies the requirements. As long as the welding quality is guaranteed, the wind resistance of the lamp stem is no problem.

6 controller

The main role of the solar charge and discharge controller is to protect the battery. Basic functions must have overcharge protection, overdischarge protection, light control, time control and reverse connection.

1) Change the state of the circuit when the battery voltage reaches the set value

In the selection of devices, currently there are microcontrollers, comparators, and more. Each has its own characteristics and advantages. It should be based on the characteristics of the customer group to select the appropriate program, not described in detail here.

2) Surface treatment

This series of products adopts new electrostatic coating technology, mainly FP professional building materials coatings, can meet the customer's requirements for product surface color and environmental coordination, while the product has high self-cleaning, anti-corrosion, anti-aging, suitable for any Climate environment. The processing technology is designed to be based on hot dip galvanizing, which greatly improves product performance and meets the most stringent AAMA2605.2005 requirements. Other indicators have met or exceeded the relevant requirements of GB. 7. Summary

Beijing Tianzhu Sunshine Solar independently researches and develops solar LED street lamps, solar street lamps and solar wind complementary street lamps. In the design - R & D - production of solar LED street lamps to break the three common problems of solar street lights (high power, LED light decay, no power output, etc.) and other issues that seriously affect the cost and efficiency of street lamps. Significantly reduced costs and increased service life. Longer-term after-sales service and quality assurance enable the promotion of solar street lighting and further development of energy conservation.

The following is the design of the company's solar street lamp: the overall design basically takes into account all aspects; the selection of the peak wattage design of the photovoltaic module and the battery capacity selection design adopts the most common design method at present, and the design concept is more scientific; The wind design was analyzed from the battery module bracket and the light pole. The analysis was relatively comprehensive. The surface treatment used the most advanced technology. The overall structure of the street light was simple and beautiful. After actual operation, it was proved that the matching between each link was good.

At present, the investment cost of Tianzhu Sunny Solar LED lighting is still a major problem that has plagued us in expanding the area. However, the efficiency of solar cells is gradually increasing, and the price will gradually decrease. Similarly, LED light efficiency in the market is rapidly increasing, while the price is decreasing. Compared with the renewable, clean and pollution-free solar energy, and environmental protection and energy saving of LED, the conventional fossil energy is becoming increasingly tense, and it will cause increasingly serious pollution to the environment after use. Therefore, Hebei Mutian solar LED lighting as an emerging outdoor lighting, will show us the endless vitality and broad prospects.

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