Take a look at the protective measures of lithium battery protection board

Protective measures for lithium battery protection board:

Carry out ESD protection measures at all stages of the production process,

During the process, especially for live positions, prevent touching components or circuits,

It is recommended to solder B4 wire first and then B2 wire during the stringing process.

Repair method for lithium battery protection board (without charge and discharge protection)

What are the situations where the lithium battery protection board lacks charge and discharge protection?

Firstly, check the ternary parameters of the lithium battery protection board: the conventional range is 2.8-4.25, and the iron lithium range is 2.5-3.65V

1. It may be due to voltage overcharge, overdischarge, overcurrent, short circuit, or overheating.

2. Use a multimeter to check if the charging and discharging MOS transistor is open

If the lithium battery protection board is equipped with LED and cannot be charged or discharged, the LED will flash for 0.5 seconds

If the lithium battery protection board is equipped with an upper computer, it can be connected to the upper computer to check the protection status

5. The lithium battery protection board is equipped with a weak point switch. Please check if the weak point switch is turned on

If these situations occur, the following methods can be used for repair:

1. overcharge, overdischarge, overcurrent, short circuit, plug in charger for recovery

2. Load recovery after overcurrent disconnection