24v battery configuration

[HamptonHall]

I have 8 Lishen 272ah cells on order through Michael and am trying to figure out a configuration that I could put in some kind of battery box, as my objective is something like Will's hand cart power project (solar to come later).

Can I do this? (would like to use the Overkill Solar 8S BMS 100a LifePo4 Battery Management System for 24v DIY Batteries)

How To Configure Cells In A Large Battery Bank​

If you are building a large battery bank, you should buy larger cells. If the largest size cells cannot do the job, you will need to combine cells in parallel first, then connect them in series. This will allow you to build and manage a large battery bank with a single BMS.

When you parallel your cells, they need to be nearly the same voltage. If you buy brand-new cells, they will come at the same voltage and you can wire them up like this:

Then Add A Single BMS To Manage All The Cells:​

 

[snoobler]

No. That's for a 12V battery. You need to connect your 8 cells in a single string series to get 24V.

 

[HamptonHall]

So I'm limited to one of the two 8 cell layouts below?
(Courtesy of Steve )

 

[Steve_S]

more config options here:
Cell Configurations for 12V 24V and 48V LiFePo4 Batteries | DIY Solar Power Forum (diysolarforum.com)

 

[HRTKD]

HamptonHall, the cell configurations in your original post would be more work to compress than the configurations in your second post.

A series of cells stacked long edge to long edge is easier to compress than if the short edges are stacked.

Just something to consider. Compression is important.

 

[HamptonHall]

No. That's for a 12V battery. You need to connect your 8 cells in a single string series to get 24V.

Thanks, Snoobler

 

[Alexpax]

more config options here:
Cell Configurations for 12V 24V and 48V LiFePo4 Batteries | DIY Solar Power Forum (diysolarforum.com)

Thank you for this! Been melting my brain all morning on how i can get away with only one BMS (24v 8s). Back to the garage i go now ?

 

[snoobler]

Thank you for this! Been melting my brain all morning on how i can get away with only one BMS (24v 8s). Back to the garage i go now ?

The picture requires 2 BMS.

 

[Alexpax]

The picture requires 2 BMS.

Yes Sir, thats the best i could come up with on my own ?. Working on copper bus bars now for proper “square” diagram and 1 BMS. Will share later tonight

 

[MrM1]

The 1 BMS method 2p8s

 

[Alexpax]

I went with this one. Bms will go in tomorrow.

 

[edclarke]

I went with this one. Bms will go in tomorrow.

Alex, how did this configuration work out for you? I'm installing the same config. with a REC BMS. Just waiting on copper bars now.