tp4056 li ion battery charging module with load.

Other Hardware General Electronics
1

Hello guys,
I am working on my home made project, I made a GPS data logger with Arduino. I attached a 3.7 single cell li-ion battery to my system and charging the battery with tp4056 Module, It is working fine when the battery is charged without connecting to the load which is my GPS data logger, when the battery is empty and i am plugged to the charger to let the battery charge, it is not charging the battery, I need to disconnect the load + Rail and reconnect it back after few seconds, then only it's charging.

I want to charge the battery while connecting it to load, Please help me in this.

Thank you

2

I'm trying this now, Is this will help.? Thanks

3

mudassir9999:
I want to charge the battery while connecting it to load, Please help me in this.

You need to buy the second version of that TP4056 module. It can charge the battery and power the project simultaneously. Costs the same.

PROBLEM SOLVED 8)

4

You need to buy the second version of that TP4056 module. It can charge the battery and power the project simultaneously. Costs the same.

PROBLEM SOLVED 8)

I forgot to mention,I have custom desig board and a shortage of space, I cannot use this latest Module.

5

They're almost the same size, btw how much space do you actually have???

You can just take another parallel connection from the IN port and add a diode and feed it into your system. When you're charging then the project will draw from the higher voltage source which is the IN port and when you're not charging then the project will draw from the battery terminals.

6

Noobian:
You need to buy the second version of that TP4056 module. It can charge the battery and power the project simultaneously. Costs the same.

PROBLEM SOLVED 8)

A little caveat I noticed recently: At least for my modules, the OUT pins are not supplied when the the battery is connected after the load. Also, they do not get the right voltage, if no battery is connected.
This prevents from braking the connection to the battery to shut of the device.
If the load is fixed on the board, I can only get it to restart by connecting battery AND external supply. Then I can detach the supply and the module runs fine.
Could only make a usable battery driven device by putting the braking switch on the output, not the battery. Haven't measured the quiescent current of the device, though. My µCurrent only arrives tomorrow.

7

@noobian

You can just take another parallel connection from the IN port and add a diode and feed it into your system. When you're charging then the project will draw from the higher voltage source which is the IN port and when you're not charging then the project will draw from the battery terminals.

I' have tried this with 3.3v Zener diode ,Zener Heats up and destroys it self.

Should I try with Silicon Diode.?

Thanks

8

mudassir9999:
Should I try with Silicon Diode.?

Yes, either that or a Schottky Diode.