Cheng Yun Wang Guojian Duan Zhengting Hong Kong Zhen Ming Li Group Co., Ltd. (529700) Abstract This paper introduces the working principle and design idea of ​​a solar LED high-power street lamp designed and manufactured by Hong Kong Zhen Ming Li Group Co., Ltd. Key words solar LED streetlights Preface As the world energy crisis intensifies, countries are seeking ways to solve the energy crisis, one is to seek the use of new energy and renewable energy; the other is to seek new energy-saving technologies to reduce energy consumption. Improve energy efficiency. Solar energy is the most direct and most common and cleanest energy on the earth. As a huge renewable energy source, solar energy reaches the surface of the earth. The radiant energy is about 250 million barrels of oil per day. It can be said that it is inexhaustible. . ![]()
Figure 1 Solar street light physical map LED spectrum is almost entirely concentrated in the visible light band, so the luminous efficiency is high, most people think that energy-saving lamps can save 4/5 is a great initiative, but LED is more energy-saving than energy-saving lamps 1/4, this It is a greater reform of solid light sources. Solar LED Lighting integrates the advantages of solar and LED. This article introduces a solar LED high-power street light from Hong Kong Zhenmingli Group Co., Ltd., as shown in Figure 1. 1 system introduction 1.1 basic composition of the system as shown in Figure 2, the system consists of solar module components (including brackets), LED lamp holders, control box (with controller, battery) and light poles; ![]()
Fig. 2 Schematic diagram of solar LED street light structure Solar panel light efficiency reaches 127Wp/m2, high efficiency, very favorable for the wind resistance design of the system; the lamp head part is integrated with 1W white LED and 1W yellow LED integrated on the printed circuit board. The lattice of the spacing acts as a planar illumination source. The control box body is made of stainless steel, which is beautiful and durable. The maintenance-free lead-acid battery and charge and discharge controller are placed in the control box. The system uses valve-regulated sealed lead-acid batteries. Because of its low maintenance, it is also called “maintenance-free batteryâ€, which is conducive to the reduction of system maintenance costs. The charge and discharge controller is designed with both functions in mind (with light control). , time control, overcharge protection, over discharge protection and reverse connection protection, etc.) and cost control to achieve high cost performance. 1.2 Working principle Introduction The working principle of the system is simple. The solar cell is made by the principle of photo-voltaic effect. During the day, the solar panel receives solar radiation energy and converts it into electric energy output. It is stored in the battery through the charge and discharge controller, and the illumination is gradually reduced to night. Around 101ux, the solar panel open circuit voltage is about 4.5V. After the charge and discharge controller detects this voltage value, the battery will discharge to the lamp cap. After the battery is discharged for 8.5 hours, the charge and discharge control operation is performed, and the battery discharge is completed. The main function of the charge and discharge controller is to protect the battery. 2 system design idea The design of solar street light is the same as the general solar lighting, but the links need to be considered more. The following is an example of the solar LED high-power street light from Hong Kong Zhen Mingli Group Co., Ltd., which is analyzed in several aspects. 2.1 Solar cell component selection design requirements: Guangzhou area, load input voltage 24V power consumption 34.5W, working hours 8.5h per day, to ensure continuous rainy days 7 days. (1) The average radiation dose in Guangzhou in the past 20 years is 107.7Kcal/cm2. The peak sunshine hours in Guangzhou are about 3.424h; 34.5 (2) Daily load consumption =-——×8.5=12.2AH 24 20+7 (3) The total charging current of the required solar modules = 1.05 × 12.2 × - ÷ (3.424 × 0.85) = 5.9A. 20 Here, the shortest design period between two consecutive rainy days is 20 days, 1.05 is the combined loss factor of the solar cell module system, and 0.85 is the battery charging efficiency.
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