【Technology Dog】
Xiaomi unveiled a new generation of self-developed chip surging P1 This is Xiaomi's first self-developed charging chip, which will be launched by the Xiaomi Mi 12 Pro that debuts next week. Xiaomi said that fast charging is a systematic project, involving life, safety, endurance and other dimensions. If you blindly pursue the limit of charging time, it will cause compromises in other aspects.
At present, the wired charging speed of 120W smart phones without exception uses a dual-cell system, and the cost of high speed is to reduce the utilization of the internal space of the mobile phone: the space that could have been left for the battery cell is occupied by more complex charging circuits and dual-cell structures, and the capacity of the double-string battery is about 4% lower under the same volume.
Not only that, the double string battery cell requires a 2:1 chip to step down when discharging, and its own conversion efficiency will lead to a waste of 3% to 4% of the power. Single-cell charging systems can circumvent these problems, but increasing the charging power to more than 100W faces great challenges.
Xiaomi officially said that the core of driving the 120W surging second charge is two surging P1, which take over the complex structure of the traditional 5-charge pump, convert the high-voltage power input into the mobile phone more efficiently into a large current that can be directly charged to the battery.
As the industry's first resonant charging chip, the P1 has a 4:1 ultra-high efficiency architecture with adaptive switching frequency, with a resonant topology efficiency of up to 97.5%, a non-resonant topology efficiency of 96.8%, and a plummeting thermal loss of 30%.
The surging P1 itself undertakes a lot of conversion work: the traditional charge pump only needs two operating modes (variable pressure, straight-through), while the surging P1 needs to support 1:1, 2:1 and 4:1 conversion modes, and all modes need to support dual-guide mode, which means that a total of 15 permutation combinations of mode switching control is required - 7 times that of traditional charge pumps.
Forward 1:1 mode makes the bright screen charging efficiency higher, forward 2:1 mode can be compatible with more chargers, forward 4:1 can support 120W surging seconds charge, reverse 1:2/1:4 mode can support high power reverse charging.
At the same time, the surging P1 is also the 4:1 charging chip with the highest charging efficiency of Xiaomi, which can achieve ultra-high power density of 0.83W/mm, and LDMOS has also reached the industry-leading ultra-low 1.18mΩmm RSP.
The surging P1 chip needs to use three different withstand voltage FLY capacitors, each capacitor needs an independent open and short circuit protection circuit, and each operating mode needs to strictly control the precharge voltage, and the number of power tubes is nearly twice that of the traditional charge pump. And because of the increase in topology design and functional complexity, each surging P1 needs to pass more than 2500 tests at the factory, which is much higher than the traditional charge pump.
In the end, it was able to greatly simplify the circuit with its help, while the ultra-high efficiency of the surging P1 itself meant that the heat generation was in the ideal range, which could maintain longer full-power operation and support wireless charging.
Huawei held a winter flagship new product launch conference, and after successively releasing a number of new products such as Huawei P50 treasure box, new MateBook X Pro, Huawei WATCH D, new Huawei smart glasses, etc., it also released the car co-built with Cilis - Q&I M5.
It is reported that the AITO brand is a brand of Xilis, which is a car brand with Huawei, and the M5 is equipped with Huawei's DriveONE pure electric drive range extension platform, and also the first harmonyOS smart cockpit.
Interestingly, during the release of the Q&I M5, Yu Chengdong, managing director of Huawei, CEO of consumer BG, and CEO of smart car solution BU, frequently emphasized at the scene that Q&I M5 is a model comparable to a million-dollar luxury car.
When mentioning that the new car is equipped with a set of 1.5T four-cylinder range extenders, Yu Chengdong said, "Some manufacturers are still using 1.3-liter three-cylinder machines, and everyone's engine must be at least four-cylinder, and you must not buy a three-cylinder when buying a car." ”
"I don't think the engine should be equipped with three cylinders, it should be equipped with four, six, eight, ten, twelve." Yu Chengdong said.
It is understood that as the latest masterpiece of Huawei and Cyris, AITO Q&I M5 is equipped with Huawei DriveONE pure electric drive range extender platform, the range extender uses a 1.5T engine, the maximum power is 92kW (125Ps), the rated power of the range extender generator is 60kW; the comprehensive peak power of the four-wheel drive performance version is 315kW, and the four-wheel drive flagship version is 365kW.
The new car will have a battery capacity of 40 kWh, a fuel consumption of 0.8 liters/100 km under the WLTC cycle, and a comprehensive cruising range of more than 1,000 km. AITO Q&I M5 Afterdrive Standard Edition pre-priced 250,000, 4WD Performance Edition pre-priced 280,000, 4WD flagship version pre-priced 320,000, starting from December 23, 2021, it will be displayed in 500 Huawei stores in 118 cities, and test drives will be opened from January 20, 2022.