[Hubers454]

New guy here
the max volt on my bug 144v - 150 v right now it is set up for 108 v with AGM batteries . Honestly the AGM batteries are toast so I am considering 128 volts of G 2 Nissan Leaf batteries, looks like 16 modules or 18 modules for 144 v. Looking for a BMS or a couple BMS . The question is can I put a bms on a pack of say 7 or 8 modules and run the packs in series? Do I calculate the bms for the pack voltage/amps or total voltage/amps of the total batteries in the car ? BMS suggestions and sources needed no millionaire here, affordable
thanks

 

[Isaac97]

For a car, the BMS just monitors the cells and doesn't carry any power itself.
The electric-bike style BMSs are able to interrupt the power, but that doesn't work for a car since you might pull 200 amps.
So the BMS in a car needs to be able to alert you if cells go too high or too low, so that you don't overcharge or overdischarge any cells.

Orion BMS and Dilithium BMS are both well regarded and have the features you need. Thunderstruck is probably more affordable.