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 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 BMSbut 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
>
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