Hi Everyone!
I have a 2011 Jonway electric moped with 48v 1500w hub motor. I bought it used, and a previous owner had modified it to accommodate a lithium battery setup. The batteries have now died (after several years of good use). I've run into some issues trying to get new batteries and I'm very confused by what I've pulled out of the machine so far.
The batteries I've taken out of the bike are 4x 20v 4.4 Ah lithium-ion (as per info printed on side) wired in series, assuming resulting in 80v. The paperwork that came with the bike says the charger I have is a nominal 48v charger. Inside the bike I found a 72v-12v DC to DC converter (assuming this is for the lights, etc.). The battery bank was going through a 48v 63amp DC breaker. I haven't found a 80v or 72v to 48v DC converter, but I also haven't stripped the bike.
Is it possible I was charging an 80v battery bank with a 48v charger? Or is it possible the batteries are mislabeled? Maybe they are actually 4x 12v batteries wired in series to create 48v? When I tested the charge of each battery individually, 2 of them read at 13.5v and 2 read at 9.3v.
So, the million dollar question is, what battery voltage should I buy? 48v? 72v? Flux capacitor? I'm inclined to go with 48v, but the bike was working really well with good power with the modified setup. Will I need to change the existing 72v-12v converter with a 48v-12v converter?
Can anyone help me decode what's going on here?
Bonus question: LiFePo4, or Lithium-ion?
Thank you!
I have a 2011 Jonway electric moped with 48v 1500w hub motor. I bought it used, and a previous owner had modified it to accommodate a lithium battery setup. The batteries have now died (after several years of good use). I've run into some issues trying to get new batteries and I'm very confused by what I've pulled out of the machine so far.
The batteries I've taken out of the bike are 4x 20v 4.4 Ah lithium-ion (as per info printed on side) wired in series, assuming resulting in 80v. The paperwork that came with the bike says the charger I have is a nominal 48v charger. Inside the bike I found a 72v-12v DC to DC converter (assuming this is for the lights, etc.). The battery bank was going through a 48v 63amp DC breaker. I haven't found a 80v or 72v to 48v DC converter, but I also haven't stripped the bike.
Is it possible I was charging an 80v battery bank with a 48v charger? Or is it possible the batteries are mislabeled? Maybe they are actually 4x 12v batteries wired in series to create 48v? When I tested the charge of each battery individually, 2 of them read at 13.5v and 2 read at 9.3v.
So, the million dollar question is, what battery voltage should I buy? 48v? 72v? Flux capacitor? I'm inclined to go with 48v, but the bike was working really well with good power with the modified setup. Will I need to change the existing 72v-12v converter with a 48v-12v converter?
Can anyone help me decode what's going on here?
Bonus question: LiFePo4, or Lithium-ion?
Thank you!