Yep, best to use a (thin) conductor to tie all 3 center posts together and the cell level BMS. Although I have seen people chance it, depend on the low voltage cut-off of the load and the max voltage setting on the charger and hope the modules stay in balance...
On Tue, Mar 19, 2024 at 7:13 PM Jay Summet via EV <ev@lists.evdl.org> wrote: > > > > On 3/18/24 18:37, John Lussmyer via EV wrote: > > > Note: You really do NOT need to tie the center posts to anything other > > than a BMS. Even with cells in parallel. > > In my leaf pack I had a 3 Parallel x 16 Series battery pack. > > I tied each of the 3 "sense" center posts together for each set of 3 > cells. [The only thing these tied together center posts were connected > to was my BMS....but I did tie the 3 center posts together.] > > How would your BMS work if it was not connected to the center posts? > Did you connect to only 1 of the 3 center posts in my example? (I was > worried that if I did this the bms itself would draw more current from > one of my 3 leaf modules than the other two, causing them to get out of > balance with each other. > > Jay > > _______________________________________________ > Address messages to ev@lists.evdl.org > No other addresses in TO and CC fields > HELP: http://www.evdl.org/help/ > _______________________________________________ Address messages to ev@lists.evdl.org No other addresses in TO and CC fields HELP: http://www.evdl.org/help/
