Four main functions of lithium-ion battery protection board
What is the difference between a battery with or without a protection board? Today LTW lithium-ion battery protection board manufacturers will answer for you.
The protection board is the protection circuit board. It is mainly composed of electronic circuits, which can accurately monitor the voltage of the battery and the current of the charging and discharging circuit at any time between -40°C and +85°C, and control the on and off of the current circuit in time.
Ordinary lithium-ion battery protection boards usually include control ICs, MOS switches, resistors, capacitors and some auxiliary devices. The control IC controls the MOS switch under normal conditions so that the battery and external circuits can be carried out. When the battery voltage or circuit current exceeds the specified value, the MOS switch is immediately controlled to close to protect the safety of the battery. It is worth mentioning that as early as 2006, XTAR applied the protective plate to a single lithium-ion battery, which was the first time in the world!
As the name implies, the lithium-ion battery protection board is used to protect the lithium-ion battery. The lithium-ion battery protection board has four functions: overcharge, overdischarge, overcurrent, and reverse connection protection.
1. Overcharge protection function:
The overcharge protection function means that when a certain voltage is reached, the charger cannot continue to charge. The overcharged MOS tube will be turned off and charging will stop.
2. Over-discharge protection function:
The over-discharge protection function stops discharging when the battery voltage is low. Turn off the MOS tube to control over-discharge and prevent it from discharging. This process is just the opposite of the overcharge detection process.
3. Overcurrent protection function:
The overcurrent protection function is to stop discharging when large current is consumed. The purpose of this function is to protect the battery and MOS tube to ensure the safety of the battery in the state. After over-current detection, the battery returns to normal after being separated from the load and can be charged and discharged.
4. Short circuit protection function:
The short-circuit protection function is to stop the discharge when a large current is consumed. The purpose of this function is to protect the battery and MOS tube to ensure the safety of the battery in the state. After over-current detection, the battery returns to normal after being separated from the load and can be charged and discharged.