Why a small circuit board is used in mobile phone battery?

Why a small circuit board is used in mobile phone battery?

The lithium-ion battery used everywhere like mobile phones, laptops, and even electric cars etc. You have probably noticed that a small board is used in mobile phone batteries. So there is a question arise why a small board is used in mobile phone battery.

Let�s know why a small circuit board is used in mobile phone battery.

Lithium-ion batteries are now the most efficient type of batteries they are compact has high energy intensity lack of parasitic memory effect but have one significant drawback the fact is that they are operating and the process of charging should be carefully monitored. If the battery discharges below a certain limit there is a high probability that it will fail. The same is in the case of overcharging. The voltage of a fully charged lithium-ion battery is 4.2 volts. In this condition, recharging can cause blistering and even the explosion of the battery. The same will happen in the case of overload and short circuits.

The board which you noticed in the mobile phone batteries, that�s protection board. The board protects from a deep discharge from overcharging and from short circuits or overcurrent. On the board, you can clearly see a couple of chips resistors and capacitors. The circuit is made by Field Effect Transistors.
The board also protects from overheating and provides uniform charge by balancing the voltage.


Read also:

• Why mobile battery has more than two terminals?
• How a Mobile Charger works?

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