The first 300W quick-charging Xiaomi Redmi broke the new record of quick-charging

The fast charging technology of mobile phones can be said to make it more convenient for users in daily use. It has also become one of the reasons why many brands of new models attract users to rush to buy. Therefore, major manufacturers are constantly rolling in. The new technology of 240W fast charging introduced by Realme just a few days ago has been officially broken by Redmi under Xiaomi recently. Red has directly released up to 300W fast charging, Those who are interested in fast charging can have a look together!

Less than a month after Realme released the 240-watt fast charging technology, Xiaomi Redmi today released the faster 300-watt immortal second charging technology, claiming that the 4100mAh battery was charged 10% in 3 seconds, 50% in 2 minutes and 13 seconds, and fully charged in 5 minutes.

It should be noted that the improvement of fast charging power is not only the improvement of wattage, but also the technical innovation of battery, charging chip, data cable, charger and cooling system. Xiaomi Redmi 300W Shenxian second charging is based on the magic transformation of Redmi Note 12, which involves the charger end, the mobile phone end charging architecture and the battery end. When the mass production is still unknown.

According to the official introduction, in terms of the charging architecture, compared with the conventional 4:2 charge pump scheme, Xiaomi 300W Shenxian Seconds uses a customized 6:2 charge pump chip, with a maximum conversion efficiency of 98%. After several charge pumps are connected in parallel, they directly charge the battery, realizing 300W super power. According to the data provided by Xiaomi, the measured peak power reached 290 watts, and the power above 280 watts lasted for more than 2 minutes.

At the same time, Xiaomi 300W Shenxian second charging is based on the double-string battery design, and the input current of the cell is up to 30A, which requires the cell to have a 15C ultra-high charging rate. For this reason, Xiaomi introduced new hard carbon materials into mobile phone batteries. Compared with graphite, the hard carbon structure is more loose and disordered, which can provide a more relaxed reaction path for lithium ion. The "hard carbon+graphite" mixed negative electrode made by mixing in a specific proportion can greatly improve the charging speed and take into account the high energy density.

Xiaomi said that under the new manufacturing process and process optimization measures, the thickness of positive and negative electrode plates has also been greatly compressed, which is further reduced by 35% compared with conventional electrode plates. Through the introduction of new lithium salt additives, core solvent ratio modulation, etc., the ultra-high conductivity electrolyte is realized, effectively improving the lithium ion migration rate and reducing the charging temperature rise.

The charging power has been greatly increased, which also puts forward higher requirements for chargers. It is reported that the size of Xiaomi 300W charger is the same as that of Xiaomi's previous generation of 210W charger. With the fourth generation GaN integrated solution, it has high power, small size, low heat and higher efficiency. The planar transformer adopts the modular design with higher integration to further compress the occupied space of the device.

In view of the heating problem that many users are concerned about, Xiaomi 300W Fairy Second Charger was also considered at the beginning of the design. Among them, the customized 6:2 charge pump chip solves the problem of large current heating in the charging input path and reduces the charging temperature rise from the source. Multiple charge pumps are distributed to effectively avoid heat concentration and prolong the duration of high power charging.

In terms of structure, the 300-watt Fairy Seconds charging adopts the "sandwich" stacking scheme. The upper and lower ultra-thin cells are fully contacted with the phase-change heat dissipation material filled in the middle, which can quickly absorb and export the heat, and effectively reduce the temperature during the fast charging. In terms of chargers, 300W chargers have added large area graphene auxiliary heat dissipation and dual heat dissipation on the basis of gel soaking, realizing ultra-high power output.

In addition, in terms of safety, Xiaomi pointed out that the safety protection of the 300-watt fairy second charger exceeded 50 items. Each charge pump in the charging architecture has independent input overvoltage, overcurrent, over-temperature and output overvoltage protection; Compared with the conventional solution in the industry, the battery PCM adds five more core hardware protections to ensure power safety.

The above is the specific information of Xiaomi Redmi's release of 300W fast charging technology. Although 300W fast charging is still only implemented on engineering machines, I believe that in the near future, Xiaomi and Hongmi will launch models that support 300W fast charging technology!