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Home > New Gear > Xiaomi Solar Panel smartphone patent leaked: will it replace power bank?
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Xiaomi Solar Panel smartphone patent leaked: will it replace power bank?

Xiaomi Solar Panel smartphone patent leaked: will it replace power bank?

By  Town Kassis 2019-08-06 483 0

Xiaomi recently patented a mobile phone with an integrated solar panel on the back, according to Lets Go Digital. Xiaomi applied to WIPO for the patent on July 27, 2018. In addition, the patent picture shows that the Xiaomi Solar Panel smartphone has a full display without any holes, notches and slide-in camera drawers, so it can be inferred that the phone will be equipped with on-screen fingerprint unlock or side fingerprint unlock, as well as a dual camera design, with flash on the list.

Xiaomi Solar Panel smartphone patent


As far as we know, the design of solar charging for mobile phones has long been in place. In 2009, Samsung launched the world's first solar cell phone, the Guru E1107, which also has solar panels on the back and can maintain 5 to 10 minutes of calls in sunshine for an hour. The conversion rate is not very high and can only be used for emergency use.


Xiaomi Solar Panel smartphone patent  


It has been developed for a long time, but the solar charging method of mobile phone is not popular because there are many problems:


First of all, the power of solar charging is proportional to the area of solar panels. If the area of solar panels is small enough, the current generated will be very weak and difficult to store in the battery.


Secondly, the charging mode of mobile phone battery is generally based on constant current and constant voltage charging, but for solar mobile phone, because of the unstable light exposure, it is very difficult to keep the voltage or current constant in the charging process.


There is also the temperature problem, the current mobile phone battery is basically lithium-ion battery. On the other hand, the working state of lithium-ion battery has a great influence on the hand temperature. In general, lithium-ion battery can play the best effect at 25 ℃ ~ 40 ℃. Solar charging is also doomed to a high working temperature, which is easy to cause a series of problems.


As fascinating as it may seem, a built-in solar-powered charging phone can be good for the environment, but it will certainly be a challenge for Xiaomi.


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