Basic knowledge of battery protection board

1. What is a battery protection board?

The battery protection board is a circuit board that protects the battery, prolongs the service life of the battery, and prevents the battery from exploding.

2. What are the functions of the battery protection board?

The battery protection board mainly has functions such as overcharge protection, over-discharge protection, overcurrent protection, and short circuit protection.

3. What is overcharge protection?

Overcharge protection means that when the battery is charging when the voltage reaches the overcharge voltage (that is, the battery is full), the protection board will automatically cut off the power supply and no longer charge to prevent the battery from exploding.

4. What is over-discharge protection?

Over-discharge protection means that when the battery is discharged to the over-discharge voltage, the protection board will protect the protection board and no longer discharge, otherwise, the battery will be scrapped.

5. What is overcurrent protection?

Overcurrent protection is the current that the protection board can withstand during normal operation.

6. What is short circuit protection?

Short-circuit protection means that when the positive and negative electrodes of the battery are short-circuited, the protective plate can prevent the battery from exploding.

7. What is the internal resistance and self-consumption of the protection board?

The internal resistance and self-consumption of the protection board itself have a negative impact on the battery. If the internal resistance and self-consumption of the protection board are too large, the standby time will be reduced, and the call will automatically shut down.

8. Classification of battery protection board:

1. According to performance, it can be divided into dual protection battery protection boards, single protection battery protection boards, and fake boards. The dual protection battery protection board has the functions of overcharge protection, over-discharge protection, overcurrent protection, and short circuit protection; the single protection battery protection board has the overcharge protection function; the fake board has no function.

2. According to voltage, it can be divided into a single-cell battery protection board (3.6V), double-cell battery protection board (7.2V), and other multi-cell battery protection boards.