I own a EVO 27.5 from 2015, and after three years and 9000Km, the bike is having a random very annoying behavior: It shuts down completely (without any error) while being pedaling, or being stopped. There is no pattern: can happen at fully charge, almost empty, on effort, idling, under cold weather or not, in bumpy terrain or totally steady...
Once it happens, the bike sometimes can be restarted, but sometimes you need to wait several minutes to be able to restart it.
I have connected a digital multimeter in the charge port (in parallel to battery output) to check what happens, and have verified the problem is the voltage drops suddenly to around 5volts, and obviously, the bike can't be started. After some time (can be seconds, can be minutes), the voltage starts going up, and in few seconds it shows back to be at nominal voltage (36 to 40 V depending on the level of charge at that moment), only at that time the bike can be restarted.
It is not a false contact issue (otherwise the voltage would go to zero, not 5-6V). My interpretation is the BMS is finding some issue and disconnects the battery.
The bike is out of warranty, so BH won't take care of it at their cost.
I have asked BH dealer and they told me this is clearly a battery fault, they won't repair and I need to purchase a new one, costing 850Eur (970USD).
I have taken it to a couple of local business who rebuild ebike batteries, and they don't want to take care of it because they found BH batteries to be very special. They say replacing cells require re-setting the BMS and there are no known procedures/tools to do so, and even worst in the case of a bad BMS, since there is no way to purchase a spare BMS.
I bought the bike at outlet price for 1450Eur, so being an old, rather outdated bike, I don't think is a wise thing to spend 60% of original cost to bring it back to life, although the truth is the rest of bike works flawlessly.
Anyone has experience on repairing Easy Motion battery packs??
Thanks in advance!
Once it happens, the bike sometimes can be restarted, but sometimes you need to wait several minutes to be able to restart it.
I have connected a digital multimeter in the charge port (in parallel to battery output) to check what happens, and have verified the problem is the voltage drops suddenly to around 5volts, and obviously, the bike can't be started. After some time (can be seconds, can be minutes), the voltage starts going up, and in few seconds it shows back to be at nominal voltage (36 to 40 V depending on the level of charge at that moment), only at that time the bike can be restarted.
It is not a false contact issue (otherwise the voltage would go to zero, not 5-6V). My interpretation is the BMS is finding some issue and disconnects the battery.
The bike is out of warranty, so BH won't take care of it at their cost.
I have asked BH dealer and they told me this is clearly a battery fault, they won't repair and I need to purchase a new one, costing 850Eur (970USD).
I have taken it to a couple of local business who rebuild ebike batteries, and they don't want to take care of it because they found BH batteries to be very special. They say replacing cells require re-setting the BMS and there are no known procedures/tools to do so, and even worst in the case of a bad BMS, since there is no way to purchase a spare BMS.
I bought the bike at outlet price for 1450Eur, so being an old, rather outdated bike, I don't think is a wise thing to spend 60% of original cost to bring it back to life, although the truth is the rest of bike works flawlessly.
Anyone has experience on repairing Easy Motion battery packs??
Thanks in advance!
