Portable Solar Charger Unprecedented Progress
With the exploitation of fossil fuels, Portable Solar Charger fewer and fewer resources can be used, coupled with fossil energy pollution of the environment more and more serious, looking for new clean and efficient energy, has become an urgent problem. From the last century people began to study solar energy, to the use of solar energy today, with unprecedented progress. People go out, Portable Solar Charger the biggest problem is the mobile phone and other electronic products power consumption finished, but not fast with the direct power supply products, how to solve this? On the basis of this problem, this paper puts forward the design of portable solar charger based on single chip microcomputer, and realizes the control of the circuit by using the intelligentity of single chip microcomputer. Portable Solar Charger The principle of photovoltaic power generation is used to convert the electric energy of solar energy into electronic product Of the power, which solved the people of a major problem. Portable Solar Charger And it can not only charge for mobile phones, but also as a general power to use, compared with the traditional charger has a great advantage.
Solar energy is an attractive energy source for portable devices. For some time it has been widely used in applications such as calculators and space shuttles. Recently, Portable Solar Charger people are considering the use of solar energy, including mobile phone chargers such as a wider range of consumer electronics applications.
However, the power provided by solar panels is highly dependent on the working environment. This includes factors such as optical density, time and location. Thus, Portable Solar Charger the battery is typically used as an energy storage unit. When the energy from the solar panel, you can charge the battery; when the solar panel to provide the power is insufficient, the battery can power the system. Portable Solar Charger How do we design a lithium example battery charger to get the most power from a solar cell and effectively charge the lithium battery? First, we will discuss the working principle of solar cells and electrical output characteristics; then, we will discuss the battery charging system requirements and matching solar cell characteristics of the system solutions in order to obtain the maximum power from the solar cells.
The output characteristics of the solar cell, Portable Solar Charger due to the small I-V characteristics of the diode there is a slight change in the series resistance (Rs) on the voltage drop there is a slight change, but the output voltage remains very constant. However, the current through the internal diode at some point is so small that it becomes biased not enough, and as the load current increases, the voltage across it decreases rapidly. Finally, if all of the current flows through the load and does not flow through the diode, the output voltage is zero. Portable Solar Charger This current is referred to as the short-circuit current (ISC) of the solar cell, which, together with VOC, is one of the main parameters defining the performance. Therefore, Portable Solar Charger the solar cell is considered to be "current limited" power supply. When the output current increases, its output voltage decreases until the final reduction is zero, if the load current reaches its short-circuit current.
The power supply provided by the solar panel is considered to be a "current limited" voltage source. The maximum charging power of the solar panel to the lithium battery is achieved by adjusting the system bus voltage near the MPP by reducing the charge current when the total current required for the system and the battery charge exceeds the output current capability of the solar panel.