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Fast Charge, The Aging Of The Technical Principles Dec 21, 2017

Recently, iPhone 8 / 8P / X release, has finally joined the long-awaited fast charge function, compared to an early fast-charge domestic mobile phone, it is many years later. So, two days ago, to his girlfriend sent a new cell phone charger, the result was furious spray: "fast charge is very hurt the battery! Do you want to give me a new phone?" Clearly say this is Do not understand fast charge technology. In order to allow everyone to understand this thorough thoroughness, real laboratory homework, give everyone a lesson, understand the battery accelerated aging what is the cause, to solve this misunderstanding.

Fast charging can ruin the phone battery? This is the wrong way for you

The principle of fast charge is actually very simple

Now the phone's battery capacity is generally more than two or three thousand mAh, using the traditional 5V / 1A charger, full of a battery at least three hours or more, more than an hour before the Nokia mobile phone is fully charged, a lot of time. As the battery capacity increases, the original charger power can not meet the needs of charging, so fast charging technology appeared.

Fast charging can ruin the phone battery? This is the wrong way for you

The major mobile phone manufacturers have introduced their own fast charge technology, the principle is to increase the charge current and voltage, in fact, high-power charge. In short, the charging port input power = input voltage x input current. General cell phone charger will have a charging curve, through the control of different voltage and current, to achieve the highest charging efficiency. In general, the most efficient way to start is constant current charging (faster charging), then constant voltage charging (charging down, because the battery itself goes up), and finally trickle charging (when fully charged After compensation for self-discharge caused by the capacity loss).

Fast charging can ruin the phone battery? This is the wrong way for you

Now most mobile phones are used Qualcomm Quick Charge charging technology to achieve, from the beginning of 1.0 standards, up to now the 4.0 standards, the higher the standard charging efficiency. QC 1.0 Breaks Through USB-IF Agreement on USB Battery Charge 1.2, Voltage and Current Raise to 5V2A, Reduce Charging Time by 40%. Fast charge in the true sense of the upgrade is QC 2.0, through the handshake agreement, so that the charger and the phone to identify each other, and then raise the handshake transmission voltage up to 20V, although the current does not change, but the efficiency of charging increased by nearly 75 %.

Fast charging can ruin the phone battery? This is the wrong way for you

QC 3.0 is based on 2.0, the introduction of the best Voltage Intelligent Protocol (INOV) algorithm, accurate control of the charging voltage, the input voltage reached 200mV a file adaptive adjustment, the performance has been improved nearly 38% while reducing Loss, this time by virtue of the voltage control, the current increased to 3A. The current mainstream fast charge mobile phone application is QC2.0 and QC3.0 standards. To the QC 4.0 is a more sophisticated smart adjustment control voltage, accuracy of 20mV for the file, the charging current voltage has become more flexible, constant 3A or non-constant 4.7A-5.6A, the voltage does not need to reach 20V So high, smart regulation between 5V-9V, eventually with nearly 20% speed increase, efficiency increased by nearly 30%.

Fast charging can ruin the phone battery? This is the wrong way for you

Fast charge technology, the reason for the need for more sophisticated current and voltage control, the main reason is to be able to get more extreme charge curve, in the first paragraph of charging, high-power charging allows users to get the maximum energy in the shortest time, the remaining uncharged Battery capacity, it is through the gradual slow down to complete the charge, to protect the battery and circuit.