BentHeadTX
Flashlight Enthusiast
Hello All,
Besides playing around with flashlights, I also screw around with electric scooters/electrified bicycles. Smoked my 36V 14AH AGM SLA pack from it going off balance so it is time to either upgrade to a 48V 20AH AGM SLA with four chargers or go NiMH.
Went to ebikes.ca and they have a 36V 12AH NiMH pack that handles 5C (60 amp discharge) that would fit my 35 amp requirement. Since they don't make 48V 12AH packs (they do make 48V 5AH) it makes me wonder if I am heading down the wrong direction. Since balancing will be an issue, I would either go with four 12V 12AH packs/chargers or two 24V 12AH packs with two chargers.
Am I creating a disaster by putting 40 NiMH F cells in series and loading them down at 3C (35 Amps?) peak? The 48V 12AH NiMH pack is 24 pounds VS 57 pounds for four B&B EB series AGM SLA batteries and I prefer NiMH depth of discharge ability VS SLA.
Figured with the RC guys, battery gurus and EV folks around here, maybe you could shed some light on loooong strings of NiMH cells running at high discharge rates. What kind of charger and how many would I need to get this mess of an idea running? Should I just go with the $450 48V 20AH SLA with four chargers or try out NiMH? This would be much simpler if A123 Systems sold 3.3V M cells with a 20AH capacity for $20 each but we have not hit 2010 yet.
Besides playing around with flashlights, I also screw around with electric scooters/electrified bicycles. Smoked my 36V 14AH AGM SLA pack from it going off balance so it is time to either upgrade to a 48V 20AH AGM SLA with four chargers or go NiMH.
Went to ebikes.ca and they have a 36V 12AH NiMH pack that handles 5C (60 amp discharge) that would fit my 35 amp requirement. Since they don't make 48V 12AH packs (they do make 48V 5AH) it makes me wonder if I am heading down the wrong direction. Since balancing will be an issue, I would either go with four 12V 12AH packs/chargers or two 24V 12AH packs with two chargers.
Am I creating a disaster by putting 40 NiMH F cells in series and loading them down at 3C (35 Amps?) peak? The 48V 12AH NiMH pack is 24 pounds VS 57 pounds for four B&B EB series AGM SLA batteries and I prefer NiMH depth of discharge ability VS SLA.
Figured with the RC guys, battery gurus and EV folks around here, maybe you could shed some light on loooong strings of NiMH cells running at high discharge rates. What kind of charger and how many would I need to get this mess of an idea running? Should I just go with the $450 48V 20AH SLA with four chargers or try out NiMH? This would be much simpler if A123 Systems sold 3.3V M cells with a 20AH capacity for $20 each but we have not hit 2010 yet.