Cell Configurations for 12V 24V and 48V LiFePo4 Batteries

Cell Configurations for 12V 24V and 48V LiFePo4 Batteries 2021-08-02

This short deck shows 1P and 2P cell configurations for 12V, 24V & 48V LiFePO4 batteries.

To get the deck, click on the orange "Download" button in the upper right of this page.

Note: Reviews, Comments and corrections are welcome

Document Revision History
Revision 2 - Added comments about alternate physical layouts
Revision 3 - Added note about weight of large configurations.
Revision 4 - Added Wh (Watt Hour) Calculations.
Revision 5 - Added parallel-first configurations for each voltage and added a note about bus-bars.
Revision 5 - Added a couple of 'bonus' layouts.
Revision 6 - Updated note about bus-bars.
Revision 7 - Added a page about design considerations for Series-First set ups.
Revision 8 - Corrected a few minor typos/mistakes
Revision 9 – Added a few ‘bonus’ 4P layouts. Also updated comments on long bus-bars.
Revision 10 - added 'flat-pack' layouts for 12V.
Revision 11 – Added a few ‘bonus’ 3P16S layouts.
Author
FilterGuy
Downloads
3,052
Views
5,556
First release
Last update
Rating
5.00 star(s) 21 ratings

More resources from FilterGuy

Latest reviews

Hard to properly express my gratitude for making this information available and understandable. Thank you and Respect!
Thank you very much for the help, brought my 1st 4p16s online this week.
Great information and explanation. Thanks for getting this information out to folks like me.
Very well done and an excellent tutorial for those getting started!
Really Loving these. Having the alt 8 cell layout is gonna help me cram these cells into my van.
Finally what I was looking for
Great info & you got an awesome from Will.
Excellent; been confused about 4s2p vs 2p4s for a while now!
This is awesome! I've been searching for a way to configure my bank without it becoming a 40 inch long string.
One question, can I take your squarish shape 2p8s configuration, make it a 3p8s configuration and wire it up the same way???
Thanks for taking the time and providing this great resource!
FilterGuy
FilterGuy
Yes, you can make a 3P8s. I am not exactly sure which layout you are referring to in the deck, but any of the 2PxS layouts can be extended by adding a 3rd cell to each of the 2p Parallel cell groupings.

Please take a look at the page that talks about bus bars.... As you get larger parallel groupings, you need to pay attention to minimizing the voltage drops across the bus bars.
Very helpful. I'm pretty new to this and am confused by the top of page 5, the 24V page. It says 4S2P but to me it looks like it should be 8S2P but I could be totally missing something. Thank you for helping me earn.
FilterGuy
FilterGuy
Good Catch!! Thank you. That is a typo that has been there a long time...... I just fixed it.
Top