79Views3Replies

Author Options:

How to change the configuration of a lithium cell pack ? Answered

I’m working on a project were I have to be able to adjust the voltage of my output by 3.7 volt increments.
Example:

12 18650 batteries hooked up in series and have the voltage change from 44.4 to 22.2 to 11.1
Essential I’m trying to go from a 12s to a 3s4p or 4p3s cell configuration.

Discussions

None
iceng

3 years ago

Here is how you do four batteries,

14.8 V = four in series,

7.4 V = two in series in parallel with two more in series,

3.7 V = four in parallel.

Be sure to click each pic to see the entire image..

BATT-SW4.bmpBATT-SW2.bmpBATT-SW1.bmp
None
Downunder35m

3 years ago

And what stops you from using simple switches?

None
mpilchfamilyDownunder35m

Answer 3 years ago

Exactly. Wire the batteries in series. Add a wire in the middle of the stack and one 3 batteries in. Now use a selector switch to select between the 3 different wires for the 3 desired outputs. The problem here is charging. You will have to charge each battery individually.