Hi guys
I just bought a used EV that is not running, but otherwise looks in very good shape. I followed the troubleshooting guide here for electric bicycle hub motors:
https://endless-sphere.com/forums/viewtopic.php?t=69441#p1047899
and it’s cleared the tests so far. I actually have a kickboard, posted in that forum, but seems to be dead there. So I will repost here:
I just got a used scooter on an auction. No brand name etc, but looks identicle to this one, except no chair and a 8800mah battery. Battery is labeled “lithium”, not sure if it’s polymer or ion.
https://item.rakuten.co.jp/gottsuprice/dendou-kick-scct/
Battery says 2014 manufacture, hub motor and controller appear to be 2017.
Anyway, battery reads 38.0v with my tester, charger reads output of 40.8v (case states 36v 1.8amp), status led is steady green. But when I plug into charge port it goes nuts with a red/green strobe and high pitch whine. I’ll assume it’s an error of some kind. Is the charger likely fried? Or it’s an issue with the BMS?
Display/menus appear to work ok, lights/horn/brake. But when you hit the throttle there’s a small jerk, then nothing. I can hear a small whine, as if the power is getting pumped in, so I release quickly. The wheel will not move again, unless I manuly slightly rotate the wheel. Then the small jerk and lock up again. There is no rattling etc in the hub, and otherwise it rotates with no resistance.
I took the scooter deck off and everything looks ok: all connections solid, nothing melted or damaged. I tried wiggling all connections (as well as throttle and hub motor wires where they enter those units) and no change.
I unplugged all phase wires from controller, and everything rotated no resistance. Plugged back in, same. Touched 2 together and get resistance, as expected. Tried all 3 phase combinations, and the other forward gets a few More degrees rotation until it stops, but still almost nothing. Running it in reverse goes the longest under power, but then also stops and spins freely.
Any idea where to start?
Additionally, How about this? Useful or junk?
New 24V/36V/48V/60V Electro Car E-bike Scooter Brushless Motor Controller Tester
https://s.click.aliexpress.com/e/bk7ltCKG
Thank you
I just bought a used EV that is not running, but otherwise looks in very good shape. I followed the troubleshooting guide here for electric bicycle hub motors:
https://endless-sphere.com/forums/viewtopic.php?t=69441#p1047899
and it’s cleared the tests so far. I actually have a kickboard, posted in that forum, but seems to be dead there. So I will repost here:
I just got a used scooter on an auction. No brand name etc, but looks identicle to this one, except no chair and a 8800mah battery. Battery is labeled “lithium”, not sure if it’s polymer or ion.
https://item.rakuten.co.jp/gottsuprice/dendou-kick-scct/
Battery says 2014 manufacture, hub motor and controller appear to be 2017.
Anyway, battery reads 38.0v with my tester, charger reads output of 40.8v (case states 36v 1.8amp), status led is steady green. But when I plug into charge port it goes nuts with a red/green strobe and high pitch whine. I’ll assume it’s an error of some kind. Is the charger likely fried? Or it’s an issue with the BMS?
Display/menus appear to work ok, lights/horn/brake. But when you hit the throttle there’s a small jerk, then nothing. I can hear a small whine, as if the power is getting pumped in, so I release quickly. The wheel will not move again, unless I manuly slightly rotate the wheel. Then the small jerk and lock up again. There is no rattling etc in the hub, and otherwise it rotates with no resistance.
I took the scooter deck off and everything looks ok: all connections solid, nothing melted or damaged. I tried wiggling all connections (as well as throttle and hub motor wires where they enter those units) and no change.
I unplugged all phase wires from controller, and everything rotated no resistance. Plugged back in, same. Touched 2 together and get resistance, as expected. Tried all 3 phase combinations, and the other forward gets a few More degrees rotation until it stops, but still almost nothing. Running it in reverse goes the longest under power, but then also stops and spins freely.
Any idea where to start?
Additionally, How about this? Useful or junk?
New 24V/36V/48V/60V Electro Car E-bike Scooter Brushless Motor Controller Tester
https://s.click.aliexpress.com/e/bk7ltCKG
Thank you
