Alistyle No. 19 - 4-string lithium battery protection board_BM3451

LoveLoli19

BM3451SMDC-T28A is the model I will test

The specific data are as follows:

Here I use more data from the information book, which is more detailed than the data I typed out personally, and saves me some effort.

This project is a charging and discharging split port application, and the board provides positive wiring.

The chip has a built-in balancing circuit and an external balancing resistor. The balancing method is passive balancing.

This is what we just finished welding. Please ignore the blue protective plate on the left. I have disabled its onboard protection function and only provide welding loading for the battery poles.

After welding, be sure to hit the protective board with the charger before turning on the output. Otherwise, an incorrect voltage will be detected on both sides of the protective board output.

The 30W output test is normal, and the protective board, battery and other components do not generate heat.

If the disconnection detection is normal, a low voltage without load will be output.