Yes, the problem appears to be the contactor continues to trip out. If i connect the cells to the charger with No contactor or BMS they charge and run the bike fine. I can test each cells voltage individually and they are all balanced. Not sure why the contactor is tripping but i found a few other people having the same problem. Still worked about a melt down
@@jamesmckeachie6149 Sounds like your bypassing the input contactor (physically small). This contactor controls the input voltage from the charger to the batteries by switching the (-) black wire. The BMS will shut this contactor (open contacts) when it detects voltages or temperatures that fall outside the safe operating ranges. I would suggest testing the jacketed 2 wire, from the BMS to the contactors for contunity with an electrical multi meter. This jacketed 2 wire also has a male/female connector (white) between the BMS and contactor. Test that is it fully connected. I would also test the contactors control "coil" by disconnecting the male/female connector. (control coil is literally a coil of wire that makes an electromagnet. The magnetic field mechanically pulls power contacts together) - High resistance/infinite indicates that the contactor control "coil" is burnt open and maybe its just slightly bouncing around and momentary contacting. - Low resistance indicated that the control "coil" is complete and undamaged.
Did you ever find a supplier for replacement battery cells? Did you get it fully charged up again?
Yes, the problem appears to be the contactor continues to trip out. If i connect the cells to the charger with No contactor or BMS they charge and run the bike fine. I can test each cells voltage individually and they are all balanced. Not sure why the contactor is tripping but i found a few other people having the same problem. Still worked about a melt down
@@jamesmckeachie6149 Sounds like your bypassing the input contactor (physically small). This contactor controls the input voltage from the charger to the batteries by switching the (-) black wire.
The BMS will shut this contactor (open contacts) when it detects voltages or temperatures that fall outside the safe operating ranges.
I would suggest testing the jacketed 2 wire, from the BMS to the contactors for contunity with an electrical multi meter.
This jacketed 2 wire also has a male/female connector (white) between the BMS and contactor. Test that is it fully connected.
I would also test the contactors control "coil" by disconnecting the male/female connector. (control coil is literally a coil of wire that makes an electromagnet. The magnetic field mechanically pulls power contacts together)
- High resistance/infinite indicates that the contactor control "coil" is burnt open and maybe its just slightly bouncing around and momentary contacting.
- Low resistance indicated that the control "coil" is complete and undamaged.