TP4056 / DW01A / FS8205A

Question

Does this circuit have to be implemented with a DW01A battery protection IC and a FS8205A dual MOSFET IC?

I want to make a simple circuit doing only the charging function of an 18650 battery.

The TP4056 has its own charging function, and it seems to be sufficient on its own.

I also read a blog saying that most commercial boards implementing these circuits are not well designed and do not use the DW01 circuit correctly.

I then asked myself the question of being satisfied with a TP4056 circuit alone in a context where I just want to make a simple load circuit.

The batteries will not be used at the same time. They will just be recharged and stored.

Answer 1

The battery protection is for protection when the charger malfunctions.

Some batteries already have the protection built into the pack. These don't need separate protection.

Some batteries don't have built in protection. These batteries should be used with separate protection.

So it depends what kind of batteries you have and are they exchangeable.

And since you have user exchangeable 18650 batteries, some have internal protection, some don't.

It might be a good idea to add protection if unprotected batteries are used.