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[peterwarm]

In the last couple of months my bike, an early 2019 SR/F, has stopped charging at 97%, not going to 100% despite being left all night. It seems stuck at 97% with zero Amps or kW input, even after leaving it for an extra hour or so. 

I normally charge to 65% and boost it the day before if I think I've got a longer ride, so its not often I do 100% charge.

Anybody got some advice before I start the dreaded "contact the dealer"?

Thanks
pete

[Richard230]

My money is on a slowly dying on-board charger.

[MVetter]

My money is on a slowly dying on-board charger.

Eh, if it's an early 2019 SR/F it potentially has 2 onboard units. Is it a standard or premium? I haven't really head much noise about the onboard units dying on the gen 3 platform.

What makes this difficult is that they took the ability to see cell balance out of the app. My first thought is that the bike just needs a good, long balance cycle. Like maybe 12 hours. Could be as simple as that.

[DonTom]

In the last couple of months my bike, an early 2019 SR/F, has stopped charging at 97%, not going to 100% despite being left all night. It seems stuck at 97% with zero Amps or kW input, even after leaving it for an extra hour or so. 

I normally charge to 65% and boost it the day before if I think I've got a longer ride, so its not often I do 100% charge.

Anybody got some advice before I start the dreaded "contact the dealer"?

Thanks
pete

I would try to run it all the way down to zero SOC and then charge all the way to full. I think that will calibrate your SOC. 97% is a not thing to worry about much, IMO. It's probably fully charged at the 97%. Is there a way to check the battery voltage on the SR/F?  If it is at the normal high voltage at a full charge, then it is your SOC that is off. If the battery voltage is lower than it should be, then it could be a charger that is slowly dying. But if you have two chargers, rule that one out. All that should do is increase the charge time a bit, if one is weak and the other is normal.


I am not a SR/F owner, but I usually understand how such things work.



-Don-  Reno, NV

[MVetter]

I would try to run it all the way down to zero SOC and then charge all the way to full. I think that will calibrate your SOC.

That's not what that does; I would not advise doing this.

[Specter]

If it's an issue with some cells being weak, or out of whack on the balance, running it to zero may seriously push the one bank that is low WAY LOW, ie to the point you are dendriting / damaging them severely.  remember these are poly's not phosphates, that shit will take them out with just a few times and god only knows how many times it's been stressed already IF there are balance issues.

If you want to try to fix it, try to leave it run overnight again, otherwise, the only way to really see what is going on is to check the voltage on each bank in the overall pack.  All it takes is one to get a little bit out and each subsequent charge pushes it worse and worse, and the ones around take a hit the other direction, until you are the point where you are having safety shutdowns if you have a decent BMS or severely lost range of travel.

Aaron

[ms_smart]

What do you mean with "charges only to 97%"? Is the dashboard still on next morning indicating an active charging session? Or is the dashboard off, you swith on ignition and see only 97%?

If it is the latter: I have the same issue.

• the bike charges up to 100%, does the loadbalancing and shuts down the charging session (dashboard is off)
• Next morning you switch on ignition. Dashboard indicates 97%

I tried to re-charge again. The bike kicks off a charging session and charges with very low Amps may be 60 seconds. After this the SOC jumps to 100% in the dashboard and stops the charging session.

I think that the BMS software has some problems to determine capacity and SOC. I have a raspberry pi permanently connected and log stuff like pack_capacity_ah. I think this parameter should be constant with some degradation over time. But this is not what happens. I have seen data between 93 and 112. Currently it says 104. This is more than 20% delta.

[MVetter]

I have seen data between 93 and 112. Currently it says 104. This is more than 20% delta.

It should never be anything other than 114.

[NetPro]

My 2020 SR/F started doing this very same nonsense a few weeks back.
I thought it was due to aging battery cells but then, I updated the firmware to the latest and much to my surprise the charging issue was gone. I was only one version behind.

I charged it to 100%, which I normally do only once a quarter, and it went to 100% and even the following day was still showing 100.

I had a hell of a hard time upgrading the firmware because bluetooth would disconnect right in the middle of the upgrade but I kept trying different phones until I was able to get it done.

[DonTom]

That's not what that does; I would not advise doing this.

Are you sure? I do not claim to be sure about Zeros, but it works for laptops as well as for Energica motorcycles. If it doesn't do the same on Zeros, they are the exception.


-Don-  Reno, NV

[MVetter]

Are you sure? I do not claim to be sure about Zeros, but it works for laptops as well as for Energica motorcycles. If it doesn't do the same on Zeros, they are the exception.

It does not do that for laptops. It does not do that for Energicas. I think you may be confusing Lithium batteries with NiCad from 30 years ago that are no longer used. The misinformation you are repeating was started by Hans Capelle in an attempt to diagnose his SR/F's magic charging, but it was quickly disproven. He admits he was entirely wrong but it's too late and people keep regurgitating it as if it were a fact.

[DonTom]

If it's an issue with some cells being weak, or out of whack on the balance, running it to zero may seriously push the one bank that is low WAY LOW, ie to the point you are dendriting / damaging them severely. 

But 0 SOC is not all that near zero in reality. And then you charge to full ASAP.


But I will admit I do not know if this works on Zeros, but it does on just about everything else that gives an SOC percentage.


-Don-  Reno, NV

[MVetter]

Despite your anecdotal evidence I must respond, again, with, "no it does not. That's not how it works."

[DonTom]

Despite your anecdotal evidence I must respond, again, with, "no it does not. That's not how it works."

You mean not how it works on Zeros, which is the exception.

[MVetter]

No that is not what I mean.