With the rapid development of science and technology, the pace of modern people's life is very fast, smart phones play an increasingly important role, how to charge smart phones in a short period of time, has become a need for many people. In general, the higher the wired charging power of the mobile phone, the shorter the battery full charge time, we use a set of measured data to illustrate.
Charging measured, faster wired fast charging is really necessary
Take smartphones with built-in 4500mAh batteries as an example, they have a wired charging power of 33W, 44W, 55W, 66W, 30 minutes of charging capacity as shown in the following figure:
It can be seen that when the wired charging power of the smartphone exceeds 66W and the battery capacity is 4500mAh, it is possible to fully charge the battery without spending 30 minutes.
When the wired charging power of the smartphone reaches 120W, the iQOO9 Pro with a built-in 4700mAh has been tested and can fully charge the battery in 21 minutes.
From the above two sets of data, it can be seen that in the case of constant battery capacity, the greater the wired charging power of the smartphone, the shorter the time for the smartphone to be fully charged, and the more it can solve the anxiety of people using fragmented time to charge the smartphone.
So the question is, how much wired charging power does a smartphone need to reduce the charging time to less than 10 minutes? What is the current development of smartphone charging power? Is the wired charging power of a smartphone really bigger and better? Regarding the above questions, the author will answer them one by one.
Faster than fast! 135W charging power confirmed commercial
120W is not the highest commercial mobile phone charging power, in the upcoming release of the Red Devil 7 series mobile phones on February 17, the charging power soared to 135W, with a 165W gallium nitride charging head, the official staff measured that the 5000mAh battery full charge time shortened to less than 15 minutes.
If the author counts the 150W fast charge and 200W fast charge that have not yet been commercialized, it is also natural that the time for the mobile phone to be fully charged is within 10 minutes. Taking the 200W wired fast charge displayed by Xiaomi in 2021 as an example, the official said that it can fully charge the 4000mAh battery in 8 minutes, which shows the fast charging speed.
Mobile phone charging power is not as fast as possible
After reading the previous content, it may make people feel that the charging power of the mobile phone should be as fast as possible. In fact, this is wrong, the charging power of the mobile phone is not as fast as possible.
Lu Weibing, partner of Xiaomi Group, president of China and International Department, and general manager of Redmi brand, once posted about the 5 major technical problems faced by mobile phone fast charging, as follows:
1, the loss of battery capacity: the faster the charging speed, the greater the loss of battery capacity. Preliminary estimates, 100W fast charge battery capacity than 30W PD fast charge loss of about 20% of the capacity, simply put, 5000mAh into 4000mAh.
2, technical realization (technical architecture): mainly using ultra-high voltage charging scheme, this scheme on the cable requirements are not high, but there is energy loss, this part of the lost energy will be converted into heat energy to cause mobile phone heat.
3, the performance of the play: how to make 100W charging not only technically accessible, but also to achieve long charging time and sustainability.
4. Security: Multiple protections need to be made for the motherboard/battery/charger, etc.
5. Cover a variety of charging scenarios: Consider wired charging + wireless charging scenarios, as well as charger compatibility.
Among the five major technical problems, ordinary users are concerned about the contradiction between charging power and battery capacity, as well as safety issues. The higher the charging power, the smaller the actual usable capacity of the battery, which affects the battery life of the phone. In order to ensure the battery life, we also see that some flagship machines are equipped with large batteries, but they do not have hundreds of watts of fast charging. Take the moto edge X30 as an example, the machine built-in 5000mAh large battery, but only on the 68W fast charge, there is no hundreds of watts of fast charge, which takes into account the contradiction between the 100 watts of fast charge and the large battery life can not be both at the same time.
As for security issues, consumers should not worry, mobile phone manufacturers have made a lot of preparations before the commercial use of higher power fast charging solutions. Taking a factory's 125W super flash charging scheme as an example, it uses three charge pumps (also known as switched capacitor voltage converters) to reduce the load in parallel, plus multi-pole ear dual 6C batteries, with the strict temperature control of ten new temperature sensors, to ensure high-speed charging safety and not hot.
Faster fast charging, where is the meaning
Through the previous text, we learned that the charging power of the mobile phone is not the higher the better, because it affects the battery life, so the problem is, faster fast charging, what is its significance?
In the author's opinion, the faster and faster is full of people's fragmented time charging needs, so that "charging for five minutes, playing for 2 hours" is achieved. For example, if you have an emergency in the morning, your mobile phone is not enough at this time, just your mobile phone supports more than 100W fast charge power, it only takes 5 minutes to fill nearly half of the power, 10 minutes to fill 80% of the power. To charge your phone, you just need to brush your teeth, wash your face, eat breakfast, and then your phone is fully charged.
Battery technology progress to solve the problem of fast charge and battery life contradiction, the previous 120W fast charge, usually can only be equipped with 4000mAh battery, and then battery technology has advanced, 120W fast charging can be equipped with 4500mAh battery, the latest is 4700mAh battery, the commercial Red Devil 7 series mobile phone, directly on the 135W fast charge + 5000mAh battery combination, it can be seen that the contradiction between higher fast charging and large battery life can be solved, It's just that we need to wait longer for a breakthrough in battery technology.
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