[RE-wrenches] Battery balancers

[Starlight]

Hello Chris,

LA batteries do not have a BMS that can block current flow to a series group of cells. Balancers are not likely needed but may benefit an aging battery bank. A long enough charge time (CV) on a healthy bank will fully charge all cells even though some cells will experience high voltage. Cross connecting cables between parallel strings will help the even distribution of voltage as it provides alternative paths for current.

Larry Crutcher
Starlight Power Systems



On May 16, 2023, at 6:24 AM, Christopher Warfel via RE-wrenches <re-wrenches at lists.re-wrenches.org> wrote:

Would you recommend that for FLAs?  Thank you, Chris

On 5/15/2023 6:12 PM, Starlight via RE-wrenches wrote:
> Jay,
> 
> I started recommending the Victron battery balancer for all series and series/parallel Li battery banks. It has eliminated trouble in some problematic systems. If you reach a cell over-voltage in the Kilovault BMS, it will block current flow, preventing the other series batteries from charging. This also causes havoc with connected equipment as the battery appears to have disconnected.
> 
> Larry Crutcher
> Starlight Power Systems
> 
> 
> On May 15, 2023, at 12:17 PM, Jay via RE-wrenches <re-wrenches at lists.re-wrenches.org <mailto:re-wrenches at lists.re-wrenches.org>> wrote:
> 
> Hi All
> 
> I’m wondering what the thoughts are on using or not balancers for 2  12v lithium in series for 24v system. The batteries don’t have any series communication. 
> Kilovault if that matters. 
> Not my design. 
> 
> It would seem to be a good idea, with victron having a good one. 
> 
> Thanks in advance
> 
> Jay
> _______________________________________________

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