In this video, how fast charging works in the smartphone is explained.

Following topics are covered in the video:

0:00 Introduction
0:53 Basics of the Li-ion Battery Charging
4:40 Smartphone charging in early generation phones
7:10 High Voltage fast charging and Qualcomm's Quick Charge Technology
9:28 Fast Charging with USB- Power Delivery
12:21 Oppo’s Super VOOC fast charging Explained (High Current Fast Charging)

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Li-ion/ Li-Polymer Battery Charging:

Li-ion or Li-polymer batteries are charged in two phases.

1) constant Current phase
Li-ion battery is charged with constant current and the voltage across Li-ion battery increases gradually. The battery gets its 60-70 % charge in the first phase itself.

2) Constant Voltage Phase
Once the Li-ion battery voltage reaches the desired charge voltage, the voltage across the battery is maintained constant and the battery current is gradually reduced until it reaches the charge termination current.

(*Charge termination current and maximum charging voltage is decided by manufacturers )

Fast charging:
For fast charging the Li-ion/ Li-polymer batteries, they are charged with the higher battery current in the first constant current phase of charging.

Broadly, in fast charging technology, the smartphone is fast charged either by charging the battery at the higher voltage (9V/2A) or at higher current (5V/ 6A).
In this video, Qualcomm's Quick Charge technology, fast charging with USB-PD, and Oppo's Super VOOC technology are explained.

This video will be helpful to everyone in understanding how fast charging works in the smartphone.

#ALLABOUTELECTRONICS
#FastCharging
#SuperVooc

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