The principle of the solar backpack is to convert solar energy into electrical energy and store it in the built-in battery of the solar backpack. When it is necessary to charge cell phones, MP3 players and digital cameras, the battery in the solar backpack will produce the electrical energy to charge them. The most important part of a solar backpack is the solar panel. The quality of the solar panel determines the amount of electricity stored.
Principle of energy production of solar panels
Sunlight shines on the p-n junction of the semiconductor to form new hole-electron pairs. Under the action of the electric field of the p-n junction, holes flow from the. Region n to In region p, electrons flow from region p to region n and a current forms once the circuit is connected. This is how photovoltaic solar cells work.
MeSolar power generation methods There are two solar power generation methods: one is the light-heat-electricity conversion method and the other is the direct light-electricity conversion method.
(1) The light-heat-electricity conversion method uses thermal energy generated by solar radiation to produce electricity. Generally, a solar collector converts the absorbed thermal energy into steam as the working fluid and then drives it away. a steam turbine to produce electricity. The first process is a process of converting light into heat; the second process is a process of converting heat into electricity.
(2) Direct light-to-electricity conversion method This method uses the photoelectric effect to directly convert solar radiation energy into electrical energy. The basic device for converting light into electricity is the cellsolar. A solar cell is a device that directly converts solar energy into electrical energy through the photovoltaic effect. When the sun shines on the photodiode, the photodiode converts light energy from the sun into electrical energy, producing current.
How to choose a solar charging backpack? You can refer to the following points:
Preferred nylon fabric
The backpack is made of high-quality nylon fabric The fabric is waterproof, scratch-resistant, cold and heat, so it is suitable even if exposed outdoors in rain, snow or wind.
Professional design
Professional ergonomic design, soft and breathable carrying system, take care of your shoulders, no need to worry that it will become an extra burden during travel.
Intelligent regulated output
The USB interface adopts intelligent regulated output to cormeet the optimal voltage of mobile phones and computers; USB charging port rubber plug design prevents short circuit in electronic products.
Solar panel conversion rate
The conversion rate of household solar panels is generally 17-19%, while Guangrui Industrial uses high-efficiency solar chips imported from SUNPOWER of the United States, with a photoelectric conversion rate of 22.5%. It charges quickly and has electricity when there is light. It can be used as an outdoor emergency survival tool.