Bafang BBS01b low power and power cutting off at low cadence

Marshall2389

Finding my (electric) wheels
Apr 13, 2020
9
1
I've had this motor for 2.5 years and it's worked very well. In the last few days it has been acting funny. Half the time I turn it on I get no assist. The display reads full battery voltage, but no assist. The other half of the times the assist will kick in. However, it's only providing about half the power it normally does. My display doesn't show motor current or power, but the 3 amp setting is unnoticeable and the 15 amp setting feels more like 6 amps.

Any ideas?

The battery connector looks fine. I would think if it was a connector issue then the voltage seen by the display would go way down when lots of current is being drawn by the controller. However, the voltage on the display doesn't change when the motor is powered.
 

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