Xiaomi mi 10 ultra it is officially among us and, with it, also the technologies that made a lot of noise during the presentation phase. The number “120” turned out to be quite recurring: 120 Hz display, 120x zoom camera and battery with charging at 120. Focusing on the latter compartment, the power supply unit inside it not only beats the charging record wired, but also of that wireless a 55. Numbers that certainly make an impression, both for good and for bad: on the net there are already those who are wondering how good it is to the battery so much power. For this Xiaomi has decided to rattle off some more data, as well as explain their operation in more detail.
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Xiaomi Mi 10 Ultra: explained in detail the operation of its charging standards
Inside the teardown we have already had the opportunity to see how Xiaomi Mi 10 Ultra is done inside. Especially the 4.500 mAh battery, able to pass from 0% to 100% in about 30 minutes. In theory it should take 23 minutes, but it is a timing that is being denied by the first tests carried out on the new Xiaomi home pupil. Timing aside, how sensible is it to use so many Watts to recharge a smartphone battery? Whenever we talk about fast charging, there are those who legitimately put the “longevity” argument on the table, claiming that the battery risks degrading much faster than with a more modest charge.
How the charging circuit works
According to the tests conducted in the laboratory by Xiaomi, the Mi 10 Ultra battery has a different voltage management than normal batteries. The power supply from 20V 6A it passes through a controller created ad hoc by Qualcomm that separates the signal in two, converting it into two outputs at 10V 6A each. This signal is then reunified, becoming from 10V 12A and finally being divided in two, since the Mi 10 Ultra battery is composed of two units connected to each other. All this takes place with a conversion efficiency of 98,5%, managing to keep the charging flow stable. As there is little energy loss, there is also little heat loss in the process, without stressing the entire circuit.
New double graphene battery
As for the Xiaomi Mi 10 Ultra battery, one has been integrated new "butterfly" battery, given the aforementioned double structure. The two 2.250 mAh units have more space available, having a smaller protection circuit than the previous ones. To further reduce the heat there is a special material behind this circuit, thus extending the life of the battery. The cells of this have a low internal resistance design, reduced by 36% compared to traditional batteries. This conformation allows for less dispersion while recharging faster and this results in a decrease in temperatures up to 4,8 ° C.
In addition, the Mi 10 Ultra adds a new highly conductive material based on graphene on the positive electrode of the battery. Just think it has one conductivity equal to 1000 times that of traditional materials. The connection to the motherboard uses a thicker, lower impedance double FPC connector, avoiding overheating.
Hardware and software increase longevity
Battery Sense technology monitors the actual voltage arriving at the cells, avoiding possible circuit errors. There is also an algorithm that balances the cells to avoid overloading on the high voltage ones and excessive discharging on the low ones, extending the battery life of Xiaomi Mi 10 Ultra. Xiaomi has integrated a total of 34 protective measures to ensure its safety, passing the TÜV Rheinland Safe Fast Charge Certification 3.0. If all this weren't enough, an independent security chip has been added with which to disable 120W charging if anything abnormal is detected. Finally, a rhodium / ruthenium alloy material is used on the USB Type-C port that is more resistant to corrosion.
Xiaomi also lets us know that it could have integrated a smaller battery and get even faster charging speeds. However, he preferred to opt for an amperage of 4.500 mAh, with which he can guarantee an adequate longevity that does not degrade too much over time. Carrying out 800 charging cycles (equal to 1 refill per day for more than 2 years) theeffectiveness Battery does not drop below 90%, when usually after 400 cycles it drops to 60%.
What about 50W wireless charging?
In addition to the 120W Mi Charge, Xiaomi Mi 10 Ultra is also able to charge wirelessly with a maximum power of 50. Also in this case the company talks about 40 minutes to go from 0% to 100%, but the first tests show times of about 55 minutes. Also in this case such short times are allowed by a new one 4: 2 architecture. Xiaomi took the two charging pumps and, instead of in series, placed them in parallel, while maintaining an efficiency level of 98,5%. These pumps are connected to the battery through the aid (also in this case) of graphene material with high conductivity.
The charging coils contained in the circuit have also been modified. These use a 5-layer, multi-strand nano-crystalline winding technology, making the denser magnetic field and effective against losses during the charging phase.
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