NeilP
1 GW
Ok, not posted for a while..and yes, tell me I am beign a lazy b***ard.. cause I am .
Read the explanation and then a question at the bottom
Just had a Stealth B52 brought down to me...not charging. is battery shagged ?..etc.
not been charged for a while, Same old story etc.
So I pull the pack and strip..start checking cell voltages....yes all way too low..0.99 1.4 etc etc.
But for the hell of it, bypass the BMS and bulk charge with my trusty twin meanwell charger....all my packs have pretty much all been 20s Lipo.
So I charge it up to a point where the BMS charge line starts working...ahh great I think, so BMS is good...it is doing its job.
So I let it tick away and turn my attention to the charger that the present owner brought down with the bike...not an original Stealth Charger, some after market one.. Old one apparently had died
OK..so the OEM stealth pack appears to be 24S2P lipo 18Ah...that is what the label says..
Edit Sorry AmberWorlf..typo should have read LiFePO4
The charger they brought down is labelled at 87.6 volts ???hmmm
A brief Google says LiFePO4 charge voltage is 4.2 volts...hmmmm..odd i thought LiFEPO4 was lower than hobby type LiPo cells?
any way...24 series at 4.2 is 100 volts or so ..yet the charger I have here ..that actually only puts out 7 volts...yes it is shagged..is labelled at 87 .something volts.
So, some one tell me..I need to order a new charger...for 24 S LiFePO4 OEM Stealth pack.
What voltage do i need?
Read the explanation and then a question at the bottom
Just had a Stealth B52 brought down to me...not charging. is battery shagged ?..etc.
not been charged for a while, Same old story etc.
So I pull the pack and strip..start checking cell voltages....yes all way too low..0.99 1.4 etc etc.
But for the hell of it, bypass the BMS and bulk charge with my trusty twin meanwell charger....all my packs have pretty much all been 20s Lipo.
So I charge it up to a point where the BMS charge line starts working...ahh great I think, so BMS is good...it is doing its job.
So I let it tick away and turn my attention to the charger that the present owner brought down with the bike...not an original Stealth Charger, some after market one.. Old one apparently had died
OK..so the OEM stealth pack appears to be 24S2P lipo 18Ah...that is what the label says..
Edit Sorry AmberWorlf..typo should have read LiFePO4
The charger they brought down is labelled at 87.6 volts ???hmmm
A brief Google says LiFePO4 charge voltage is 4.2 volts...hmmmm..odd i thought LiFEPO4 was lower than hobby type LiPo cells?
any way...24 series at 4.2 is 100 volts or so ..yet the charger I have here ..that actually only puts out 7 volts...yes it is shagged..is labelled at 87 .something volts.
So, some one tell me..I need to order a new charger...for 24 S LiFePO4 OEM Stealth pack.
What voltage do i need?