I have a less-than-year old, hardly ridden Emoto Traveler 1. It feels like the battery cuts in and out when I am putting effort in going up a hill, even though the battery says it is fully charged. The indicator on the handlebar drops to partially charge at this time, while the battery is showing no change. The most recent time this occured, the battery had been over-charged for at least a day, I had ridden 4 miles, using the high-power option, and coming home, this affect appeared. My dealer can't reproduce this as he has no hills nearby. Does anyone have any suggestions? My email to Emoto remains unanswered. Thanks.
Emoto bike and battery
- Thread starter lrpd
- Start date
Weak cell(s) in the pack, probably. You'd have to check the individual cells under load to see which are problematic, and replace them if necessary.
It might be possible to individually charge up the weak cell(s) to top them off, but this may not be a lasting fix, if they are failing they will have a lower capacity and a higher internal resistance, and the problem can get worse until the cell(s) are unusable (can take a long time, or be quick).
It might be possible to individually charge up the weak cell(s) to top them off, but this may not be a lasting fix, if they are failing they will have a lower capacity and a higher internal resistance, and the problem can get worse until the cell(s) are unusable (can take a long time, or be quick).
dogman dan
1 PW
http://www.emotoev.com/products/bicycles/folding/traveler10/index.html
It does sound like the battery sags under load. It may have developed a weak cell, that is less able to stand higher rates of discharge, such as climbing up a hill.
Sometimes a battery is just unbalanced, and one cell is not getting a full charge. For typical lithium bike batteries, leaving it on the charger for very long periods may allow the bms to restore the battery balance. If bad, it can take a long time, even weeks, on the charger.
Do you routinely leave it on the charger overnight? Removing it from the charger as soon as the light turns green doesn not allow time for the bms to balance the pack, if it is needed.
It does sound like the battery sags under load. It may have developed a weak cell, that is less able to stand higher rates of discharge, such as climbing up a hill.
Sometimes a battery is just unbalanced, and one cell is not getting a full charge. For typical lithium bike batteries, leaving it on the charger for very long periods may allow the bms to restore the battery balance. If bad, it can take a long time, even weeks, on the charger.
Do you routinely leave it on the charger overnight? Removing it from the charger as soon as the light turns green doesn not allow time for the bms to balance the pack, if it is needed.
USAEBIKECO
10 kW
Yep it's probably the battery. My guess is the rest of the components are working ok. Could also be the connection from the controller to the battery.
Ykick
1 GW
I'm just piling on at this point and battery seems very likely. Or, as noted, probably just a weak cell shutting the whole thing down.
As far as further testing - unplug a brake switch and you might be able to drag the brake a little bit to simulate going up a hill? Also, put the battery pack in your fridge overnight and if problem get's worse, then little doubt.... Just let room mates know what's going on, LOL...
As far as further testing - unplug a brake switch and you might be able to drag the brake a little bit to simulate going up a hill? Also, put the battery pack in your fridge overnight and if problem get's worse, then little doubt.... Just let room mates know what's going on, LOL...
ddk
100 kW
- Joined
- Nov 4, 2011
- Messages
- 1,903
you're not "overcharging" the battery by leaving it attached to the charger. In fact I recommend you leave on the charger overnight to allow the bms to balance the pack first. It takes many hours for a bms to balance an out-of balance battery pack.
Then, if the problem re-occurs it's time to fix or replace the battery pack.
Then, if the problem re-occurs it's time to fix or replace the battery pack.
Thank you all for the responses... I will try as the suggestion of leaving the battery to charge for a week or so to see if that balances the cells... then, it seems to me that since the bike is under warranty, I would want to send the battery back...Thanks again for the support
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