Use two TP4056 to charge lipo 2s?

Other Hardware General Electronics
1

basically what the title says, I want to build a portable lipo charger for 2s batteries, put together this diagram so that you understand what I want to do, from what I understand, it should charge the cells well up to 4.2v individually

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What I want to do is a mini portable charger for 2 2s batteries using a total of 4 TP4056 (2 for each battery), and an arduino to display the individual cells on a screen, I know that this module has overload protection

2

A link to the data sheet of your modules is required.

I think that you will produce short circuits with stacked batteries. Better separate the batteries and load them individually.

3

Those TP4056 modules are real cheap for sure and have been around for a long time.

But the TP4056 IC is specifically for charging a single Lithium cell, its not designed to charge a string of lithium batteries in series.

What is the input voltage you were using to charge the 2S array ?

4

They are 3.7v batteries, they are high discharge drone batteries, I am attaching a photo as an example of one I have

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5

That would be impossible, they are batteries for drones

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6

No. That circuit would produce direct shorts across the cells. You need an official 2S charger, something like a TP5100 module. But I think you would need high charging voltage for that, maybe 10-12V, not just USB 5V.

7

Two TP4056 might be possible is two completely separate power supplies are used.
This module for a 2S pack should be easier.
Note that it needs >8.8volt to charge a 2S pack. 12volt would be ok.
Leo..

8

I use this model to load 2 cells.

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9

Your 2s charger does no balancing :slight_smile:

10

With that module I can't load it in a balanced way, right?

11

Do you know the bms HX-2S-01? I suppose it could be useful for what I want to do, right? I imagine that it will work well to charge the batteries of 2s drones and will cut at 4.2v

12

If I used an HX-2S-01, I could charge the 2s drone batteries, right? They are delicate batteries from what I know, I don't know if that module will help me to charge