Help with 48v battery BMS in Phoenix

[CK1]

Hi everyone,

I'm having problems with a couple of BTR 48V LiFePO4 batteries, and I believe the issue is with the BMS. I’m looking for someone in the Phoenix area who could help me test the batteries and confirm if the BMS is the issue.

I'd also like to learn how to troubleshoot and repair them safely myself, without damaging the packs. If you have experience with BTR batteries or BMS diagnostics, your help would be much appreciated.

Please message me if you're local and willing to help, or share any tips or resources that could point me in the right direction.

Thanks!

 

[amberwolf]

No experience with that specific pack, but plenty of experience with battery troubleshooting (mostly here on es helping ohters figure theirs out), and maintianing my own (doens't take much with good matched cells ).

As for tips and resources, the many many battery troubleshooting, testing, repair, and build threads here on ES are there whenver you want to poke around for them.

Battery problems are almost never the BMS. They are almost always bad cells, bad construciton, environmential damage, etc. and the BMS is just doing it's job shutting the pack off to prevent cell damage that can lead to a fire.

Most of the time it's that the cells are differen from each other in properties, and fixing that essentially requires replacing the cell block iwth new matched cells. It's probably easier and cheaper to buy used ev modules with large-format cells in them from greentecauto, batteryhookup, etc, and reconfigure those to do the job you want, and if it's the same series configuration and cell chemistry, reuse the bms from the packs you ahve for the new ones.

What is the specific problem you are having with each battery, and what specifically happened just before the problem began? More detail is better.