Hobby king sells battery alarms. Will On Aug 25, 2016 9:06 PM, "Doug Conn" <dwconn...@comcast.net> wrote:
> That’s right, Joe. The cells in the battery packs are connected by four of > these: > > > > http://www.batteryspace.com/Smart-LED-Balance-Module-for- > 3.2V-LFP-Cell-with-250mA-Balance-Current.aspx > > > > They do NOT guard against over-discharge. > > > > I’d like to add a programmable battery voltage alarm. I’m having trouble > finding a small one that doesn’t need to be connected to each cell in the > pack. I’ll need to measure the output of the entire pack and alarm on that. > I tried adding wiring to each cell and it did not work out well. > > > > - Doug > > > > *From:* rctankcombat@googlegroups.com [mailto:rctankcombat@ > googlegroups.com] *On Behalf Of *Joe Sommer > *Sent:* Thursday, August 25, 2016 8:05 AM > *To:* R/C Tank Combat <rctankcombat@googlegroups.com> > *Subject:* Re: [TANKS] LiFePo4 Sources & Recommendations > > > > > On Tuesday, August 23, 2016 at 9:46:41 PM UTC-4, RocketMan wrote: > > I got my 12.8v LiFePo4s from here: > http://www.batteryspace.com/lifepo4-prismatic-battery-12- > 8v-20ah-256wh-10c-rate-24-0---un38-3-passed-dgr.aspx > > Doug, > > Is there a charging system on a small board in the top of the plastic case? > It appears that you can connect directly to the positive and negative > terminals > of the four cells in series but does not show any connections to > intermediate > cells to monitor balance during charging. > > If there is a board, it does not provide low voltage cutoff because the > description > warns to not discharge below 10V which is below the recommended 2.8V per > cell > minimum for LiFePO4. > > Joe > > -- > -- > You are currently subscribed to the "R/C Tank Combat" group. > To post a message, send email to rctankcombat@googlegroups.com > To unsubscribe, send email to rctankcombat+unsubscr...@googlegroups.com > Visit the group at http://groups.google.com/group/rctankcombat > > --- > You received this message because you are subscribed to the Google Groups > "R/C Tank Combat" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to rctankcombat+unsubscr...@googlegroups.com. > For more options, visit https://groups.google.com/d/optout. > > -- > -- > You are currently subscribed to the "R/C Tank Combat" group. > To post a message, send email to rctankcombat@googlegroups.com > To unsubscribe, send email to rctankcombat+unsubscr...@googlegroups.com > Visit the group at http://groups.google.com/group/rctankcombat > > --- > You received this message because you are subscribed to the Google Groups > "R/C Tank Combat" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to rctankcombat+unsubscr...@googlegroups.com. > For more options, visit https://groups.google.com/d/optout. > -- -- You are currently subscribed to the "R/C Tank Combat" group. To post a message, send email to rctankcombat@googlegroups.com To unsubscribe, send email to rctankcombat+unsubscr...@googlegroups.com Visit the group at http://groups.google.com/group/rctankcombat --- You received this message because you are subscribed to the Google Groups "R/C Tank Combat" group. To unsubscribe from this group and stop receiving emails from it, send an email to rctankcombat+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
