What kind of charger do you use to avoid over charging the batteries? Derek
On Mon, Sep 23, 2013 at 11:14 AM, Mike Mangus <[email protected]> wrote: > I haven't worried overmuch about the low voltage cutoff in my ships > nor T81. The ships ESCs have an automatic low voltage cutoff. Not sure > off hand if T81's ESC had a low voltage cutoff. Either way, if the > ship/tank was obviously running slow then it was time to stop even if the > issue was not a low battery voltage but something else. > > The only time I have knowingly run down a LiFE pack was in a small > pre-drednaught on it's third sortie. The ship's pump is agressively > motored and by the third sortie the pump stream was wilting fast and the > ship slow ... obvious signs that the LiFE cells had reached near the end of > their capacity (LiFE, NiCads, NiMH, etc hold voltage levels until nearly > exhausted). The cells recharged without showing any damage. > > For the battery I linked earlier, I would pop the top off and install the > single cell balancers on each cell before popping the top back on. That > will ensure the pack stays balanced and lets the pack be charged > with one charger versus the multiple single cell chargers I use to charge > each cell individually to keep voltage balance. Even so, there is no > problems with field charging the entire pack during the day and then > topping off the individual cells in the evening with the single cell > chargers. Kinda a manual way of cell balancing that has worked well the > past couple years. > > Hope this helped more than it confused. :) > > Mike > > > *From:* Derek Engelhaupt <[email protected]> > *To:* [email protected] > *Sent:* Friday, September 20, 2013 3:20 PM > > *Subject:* Re: [TANKS] Re: Battery find > > From what I'm reading, the LIFEPO4 bats can't go below 2.4V or you risk > damage to the individual cells. Since the BMS controls the balancing of > the cells while charging and has the low voltage cutoff function, wouldn't > you be better off just using a BMS since the PCB doesn't have a low voltage > cutoff or overcharge protection? Just trying to get better educated on the > cells before dropping the cash... > > Derek > > > On Fri, Sep 20, 2013 at 2:45 PM, TyngTech <[email protected]> wrote: > > Yes, they break open the packs and extract the individual cells. > > S > > > On Friday, September 20, 2013 2:38:02 PM UTC-4, [email protected] wrote: > > Mike, > > I have some questions for you about those packs. I know I would have to > buy two and wire them in series to produce 24V like I do with my SLAs. I > understand that part, but the PCB won't fit those terminals. Do you or can > you open up the battery and install the PCB on the individual cells in the > pack? Does the PCB act like a BMS circuit? > > Derek > > -- > -- > You are currently subscribed to the "R/C Tank Combat" group. > To post a message, send email to [email protected] > To unsubscribe, send email to > mailto:rctankcombat%[email protected]<rctankcombat%[email protected]> > > 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 > mailto:rctankcombat%[email protected]<rctankcombat%[email protected]> > . > > For more options, visit https://groups.google.com/groups/opt_out. > > > -- > -- > You are currently subscribed to the "R/C Tank Combat" group. > To post a message, send email to [email protected] > To unsubscribe, send email to [email protected] > 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 [email protected]. > For more options, visit https://groups.google.com/groups/opt_out. > > > -- > -- > You are currently subscribed to the "R/C Tank Combat" group. > To post a message, send email to [email protected] > To unsubscribe, send email to [email protected] > 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 [email protected]. > For more options, visit https://groups.google.com/groups/opt_out. > -- -- You are currently subscribed to the "R/C Tank Combat" group. To post a message, send email to [email protected] To unsubscribe, send email to [email protected] 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 [email protected]. For more options, visit https://groups.google.com/groups/opt_out.
