The difference between solar battery and lithium ion battery
Most smart electronic products now use rechargeable lithium batteries. Especially for mobile electronic devices, because of its light weight, portability and multiple application functions, users are not restricted by environmental conditions during use and have a long operating time. Therefore, lithium batteries have become the most common choice despite their battery life weakness.
Examples of lithium batteries in mobile phones
Although solar cells and lithium batteries sound like the same product, they are not always the case. There is still the most essential difference between the two. Simply put, solar cells are a kind of power generation equipment, which can not directly store electrical energy, while lithium batteries are a kind of storage batteries, and can continue to store electricity for users.
The lithium battery in the mobile phone can be recharged
The working principle of solar cells (inseparable from sunlight)
Compared with lithium batteries, one disadvantage of solar batteries is revealed, that is, they cannot be separated from the sunlight. The conversion of solar energy into electricity is synchronized with the sunlight in real time. Therefore, for solar energy, it is only during the day or even on sunny days. At home, it can’t be used flexibly as long as the battery is fully charged like a lithium battery.
Difficulties in "slimming" solar cells
Because the solar battery itself cannot store electric energy, it is a very big bug for practical applications. Therefore, the R&D staff made a brainstorm and used solar batteries in combination with super-capacity batteries. Lead batteries are one of the most widely used solar power supply systems. Class large-capacity battery. The combination of the two products makes solar cells that are not small in size become more "large". If you want to apply them to mobile devices, you must first go through the process of "slimming".
lead battery
Because the energy conversion rate is not high, solar cells usually have a large sunlight area, which is the first major technical difficulty they face on the way to "slim down". The current limit of solar energy conversion rate is about 24%. Compared with expensive solar panel production, unless it is used in a large area, the practicality will be greatly reduced, not to mention the use in mobile devices.
Because the energy conversion rate is not high, the solar cell usually has a large sunlight area
How to "slim down" with solar cells?
The combined use of solar cells and recyclable lithium batteries is one of the current research and development directions of scientific researchers, and it is also an effective way to mobilize solar cells. The most common solar battery portable product is mobile power. By converting light energy into electrical energy and storing it in a built-in lithium battery, solar mobile power can charge mobile phones, digital cameras, tablet computers and other products, which is energy-saving and environmentally friendly.
Can the mobility of solar cells be realized?
Solar cells that can truly be industrialized are mainly divided into two categories: the first category is crystalline silicon cells, including polycrystalline silicon and monocrystalline silicon cells, which account for more than 80% of the market share; the second category is thin film cells, which are further subdivided into Amorphous silicon cells have simple process and low cost, but low efficiency and signs of decline.
thin film solar cell
The thickness of the thin-film solar cell is only a few millimeters, and it can be bent and folded, and it can also use a variety of different materials as the substrate material. It can be directly docked with the lithium battery for charging, which means that the solar cell will be developed into a new type of environmentally friendly charger. It is still very possible. And this kind of charger can be presented in different shapes, which will be more convenient to carry, such as hanging on a school bag or clothes, it can charge the mobile phone, and the battery life problem is solved.
Thin-film solar cells are thinner than traditional solar cells
Solar charging board
Many developers now believe that graphene-based lithium batteries are an important breakthrough to solve the battery life of mobile electronic devices. If the conversion rate of solar cells per unit area can be effectively improved, then the cool form of mobile charging anytime, anywhere will become the future energy source. The perfect way to apply the problem.
Summary: Solar energy is nature's most generous gift, but the use of solar energy is not very popular at present, and the use of solar power to generate electricity still has the problems of high cost and low conversion efficiency. Only by effectively increasing the conversion rate of solar energy per unit area can energy be used effectively and the perfect transition from solar energy to electric energy can be realized. By then, the mobility of solar cells will no longer be a problem.
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