Wireless fast charging > wired! Xiaomi Super Cup finally come true

Xiaomi 10 supreme commemorative edition officially appeared at Lei Jun’s public speech on the 10th anniversary of Xiaomi, with a starting price of 5299 yuan. < / P > < p > in addition to the industry’s best mobile camera, 120Hz hyperbolic flexible screen, snapdragon 865 flagship processor and other configurations, it also launched the first mass production of 50W wireless second charger. < / P > < p > according to the official introduction, the 50W wireless second charging of Xiaomi 10 supreme commemorative version can charge 4500mAh large battery to 100% in 40 minutes, and the charging speed even exceeds that of wired charging with the same power. < / P > < p > official science popularization, Xiaomi 10 supreme commemorative edition adopts a more efficient charging architecture. On the one hand, it reduces the architecture level in the process of wireless charging, on the other hand, it improves the conversion efficiency of charging chips. < / P > < p > first of all, different from the conventional 2:1 double-layer charging scheme, Xiaomi 10 supreme commemorative edition adopts a more direct 4:2 single-layer charging structure, which can effectively reduce the energy consumption during charging. < / P > < p > when high-power wireless charging is adopted, the conventional 2:1 double-layer charging scheme requires two-stage charge pump to step-by-step depressurization, and each step of voltage reduction means primary energy loss, which inevitably leads to higher energy loss. < p > < p > assuming that the energy received by the coil is 100, the conversion efficiency of the charge pump is 97%. In theory, the energy received by the conventional mobile phone battery is 100×97% x97% ≈ 94 without considering other losses such as circuit. However, the 4:2 direct charging architecture of Xiaomi 10 supreme commemorative version only needs one step of voltage reduction. In theory, the energy received by the battery is 100×97% ≈ 97 without considering other circuit losses. < / P > < p > in the past, the conversion efficiency of charge pump chips was about 95% and 96%, and that of Xiaomi’s previous generation was 97%. This time, the conversion efficiency of custom-made charge pump chips was further improved to more than 98.5%, with higher charging efficiency and lower loss, which reduced the energy loss during charging from the source. < / P > < p > secondly, the more efficient customized charge pump can also reduce the heat generated during the charging process, and the lower charging temperature further extends the duration of high-power charging and improves the charging speed. < / P > < p > not only that, Xiaomi 10 supreme commemorative edition also adopts dual parallel charging, which decomposes the large current into two-way small current charging, reduces the impedance of the charging path, and reduces the heat loss of the charging path. It not only improves the overall conversion efficiency, but also greatly improves the charging stability. < / P > < p > it is worth noting that Xiaomi 10 supreme commemorative edition has comprehensively optimized the battery scheme, charging strategy, component selection, charging coil and even wireless seat charging. < / P > < p > Xiaomi 10 supreme commemorative edition adopts a brand-new butterfly double string battery, with two 2250mah cells in series, equivalent to 4500mAh. < / P > < p > the newly designed butterfly packaging mode also has smaller protection circuit than the traditional side-by-side double series battery, and obtains larger battery capacity under the same volume. < / P > < p > a new highly conductive material graphene is added to the positive electrode of the battery. The conductivity is 1000 times higher than that of the traditional carbon black material, which further improves the charging efficiency of the battery. < / P > < p > the thicker and lower impedance dual FPC connection between the battery and the motherboard can not only disperse the heat source, but also effectively reduce the energy loss during charging, reduce the heating and improve the charging efficiency. In addition, phase change thermal storage materials are added on the back of the protection circuit to effectively alleviate the temperature rise of the battery during charging and prolong the duration of high-power charging. < / P > < p > in addition, for the first time, Xiaomi 10 supreme commemorative edition adopts multi-level stepwise current regulation technology and cell voltage detection to realize real-time charging power regulation, upgrading from the original “multi-level shift” to approximate “stepless speed change”. Through more refined charging strategy and Mi FC fast charging technology, the overall speed is further improved. < / P > < p > it not only enables the magnetic field of wireless charging to gather more intensively around the receiving coil, but also avoids the skin effect, effectively reduces the energy loss of the coil during the wireless charging process, and greatly improves the energy transmission efficiency of the coil. < / P > < p > thanks to the 4:2 efficient charging architecture and numerous details optimization, the 50 Watt wireless charging speed of Xiaomi 10 supreme commemorative edition is far higher than other mobile phones supporting wireless charging on the market, and even better than the concept machine with higher power, which makes the wireless charging speed surpass the wired charging with the same power. gather and watch! Huawei P40 Pro evaluation: excellent mobile phone photography elegant design, do you like it?