The high-power LED solar lighting system converts solar energy into electrical energy through a solar silicon solar panel into a sealed lead-acid battery, which supplies power to the entire system. For the purpose of practical application, this paper designs the circuit of high-power LED solar lighting system from the perspective of meeting the requirements of road lighting or landscape lighting, so that the system has perfect sealed lead-acid battery charge and discharge management function and LED constant current drive. Function, system related parameter display function and corresponding over voltage and over current protection functions.
Keywords: LED solar lighting system
Introduction <br> <br> as a green lighting semiconductor lighting technology, small size, low energy consumption, safety, long-life characteristics, service life of about 20 to 30 times the incandescent lamp, fluorescent lamp 10 times, was It is called “rich mine†for energy conservation and environmental protection. The solar lighting system uses solar energy as the energy source, and each solar lighting system is an independent system. During the installation and construction, it is not necessary to pre-embed the cable and excavate the road surface, which saves a lot of expenses and also prevents the safety hazard caused by the aging of the electric wire. Therefore, the use of high-power LED solar lighting systems will greatly save electricity and maintenance costs.
For the purpose of practical application, this paper designs the circuit part of high-power LED solar lighting system that meets the requirements of road lighting or landscape lighting, so that the system has perfect sealed lead-acid battery charge and discharge management function, LED constant current driving function and system related parameters. Display function and corresponding overvoltage and overcurrent protection.
The charging circuit 1 1.1 power LED sealed lead-acid battery charging system solar lighting characteristic <br> <br> lead-acid batteries because of its low manufacturing cost, high capacity, low cost has been widely used. However, if used improperly, its life will be greatly shortened. The American scientist Maas has done a lot of experimental research on the charging process of the open battery, and proposed the charging curve acceptable to the battery with the minimum outgas rate, as shown in Figure 1. Experiments have shown that if the charging current changes according to this curve, the charging time can be greatly shortened and the battery capacity and life are not affected. In principle, this curve is called the optimal charging curve, which lays the research direction of the fast charging method. As an important part of high-power LED solar lighting system, the charging control of sealed lead-acid batteries is extremely important. The charging control circuit is the top priority of the system circuit. Therefore, in order to operate the battery in an optimum state to obtain the longest service life, it is necessary to make the performance of the charge control circuit meet the charging requirements of the sealed lead-acid battery.
Click to watch or download online: High-power LED solar lighting system related circuit design.rar
Dual-band WiFi module refers to the WiFi module that supports both 2.4GHZ and 5GHz bands. The dual-band WiFi module can operate in the 5Ghz band, which is much cleaner and can easily avoid interfering with each other. The advantage of 2.4G is that it has good ability to penetrate the wall, and the disadvantage is that it is easy to be disturbed. The advantages of 5G are strong anti-interference ability, wide band width, high throughput rate, and strong scalability, but the disadvantage is that 5G is only suitable for indoor small-range coverage and outdoor bridge, and the attenuation effect of various obstacles on it is much larger than 2.4g.
Dual-band WiFi module has a stronger and more stable Wifi wireless signal, higher transmission speed, and can make wireless devices more power-saving, to meet the future high-definition and big data wireless transmission needs.
When selecting a dual-frequency WiFi module, we should pay attention to these parameters of the WiFi module: size, package, frequency range, data rate, transmission rate, transmission distance, communication interface, power supply voltage, antenna interface, etc.
Dual frequency WiFi module can well meet the functional needs of users, increase the competitiveness of the product, while the WiFi module is easy to use, can shorten the user product development cycle, speed up the product market! Users can make choices according to actual needs!
Choosing a dual-band WiFi module may need to pay attention to the following points:
(1) Consider the transmission power of the dual-frequency WiFi module
The transmitting power of the WIFI module is generally about 18dBm, and the transmitting power of the high-power WIFI module is about 28dBm.
(2) Transmission rate
Consider whether the dual-band WiFi module supports MIMO technology (that is, allows multiple antennas to send and receive multiple spatial streams simultaneously)
(3) Consider the application interface that dual-band WiFi modules can provide, which is also very important.
(4) According to the requirements of the application scenario to choose the dual-band WiFi module, not the higher the configuration, the better, the application is good, excess waste!
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