Circuit for charging 18650 in both series and parallel

Hi,

I'm tying to power up my project, I have 4 batteries, two batteries in series and each pair in parallel to each other, (the explanation is in the attached picture), the thing is I couldn't find any proper guidance online so I'm asking you guys if you can guide me through this.

What I need is to be able to get 7.4V and 17.600 mAh, while using that circuit to charge the batteries also, the parts in the project are:

4x 18650, 3.7v, 8800mAh
4x B05052-1w
4x TP4056 w/ protection

Thanks in advance

One reason for no result of guidance in the subject might be it's not a good idea.
Note that connecting 2 cells in serie, cascade, gives the Ah of only one cell.
Connecting batteries in parallell is not a good design. Divide the load and batteries into separate blocks.

Railroader:
One reason for no result of guidance in the subject might be it's not a good idea.
Note that connecting 2 cells in serie, cascade, gives the Ah of only one cell.
Connecting batteries in parallell is not a good design. Divide the load and batteries into separate blocks.

Hi Railroader, what I'm trying to do here is to get higher voltage and higher capacity, sorry if I wasn't clear enough, I'm attaching a picture of what I'm trying to achieve

The thing is I still need to be able to charge the batteries with that configuration and that is why I pasted the circuit diagram
Regards,

As I said, don't connect batteries in parallell. That calls for matched, likely rather expensive, cells to take advantage of their capacity. Divide the power source - load into blocks.

Charging batteries connected in serie is also not good. It also calls for matched cells. There are sophisticated chargers charging batteris in serie but they are quite a bit complicated.

I suggest You change from those 3.7 volt LiPos to 12 volt standard battery, buck converters and a proper 12 volt charger.

4x 18650, 3.7v, 8800mAh

<< I doubt that you got a battery in a 18650 package that will give you 8.8 amps for an hour.

These might be what you are looking for?

Idahowalker:
<< I doubt that you got a battery in a 18650 package that will give you 8.8 amps for an hour.

These might be what you are looking for?

Thanks, that should work, will try and get back to you

There's nothing wrong with xSyP lithium battery configurations but you need balancing and protection circuitry for all the cells.

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