[ Some think it may be due to charging to higher SOC but not allowing the balance to complete.
Why would anybody expect that?
I have a 2020 SS9- and I usually fast charge it to around 95% SOC before I disconnect. I can't see why that would only cause problems on the newer bikes.
-Don- Auburn, CA
[/quote]
As Demoni / Chris says, the error message in itself doesnt indicate anything in particular, so what to expect depends on how it occurs.
What some experience (me included- bike sent to italy for diagnosis/repair) is a few things that may follow each other:
1: You get undefined faults when regenerating at high SOCs
2: The bike struggles with balancing while fast charging- ie the charging current bounces up and down- unless manually dialed down
3: The bike limits power at lower SOCs- quite heavily- say when going uphill at 80-90km/h and you try to overtake a car, and there is absolutely nothing to fetch while it is clearly not traction control stepping in.
During normal riding, 3 is hard to identify, because it is sporadic, and you can get limited in one go and 5 seconds later it is already better, and if you, like me mostly use the bike between 90 and 60% SOC this is not likely something you will see until something is very wrong. 1 and 2 on the other hand is easier to spot. Charge the bike to full and roll down a hill with regen on (i dont reccomend doing this, but it will likely provoke the fault if it is there). 2 will likely happen anywhere from 50% SOC and up when DC charging at full speed.
What it seems (there are other options too, however unlikely) is that the bike doesn't balance the battery properly, which results in one or more cells getting weak. Whether or not they can be saved is (to me, while writing this) an open question. A weak cell may both be depleted faster and reach high voltages faster, which explains both 1. and 3. since the bike has built in features to protect the battery from harm. For 2, it seems the bike has trouble adjusting charging speed on DC chargers when the bike really needs to balance.
If this is caused by issues having the bike balanced, it may shed some light if it is related to how we charge. I mostly charge AC on reduced speed overnight (due to power related tariffs on electricity), but although the bike reports starting to balance, it does not seem to help-- except for the last trip to the dealer (~350km) where i manually set the DC charging speed to the level where it would balance without bouncing up and down - - at that trip, i DC charged 3 times: The first time, i was limited to 15A at 65% SOC, and 10A at 69%, so i gave up at 70%. The next charging session i got 20A up to 68%, while the last session was much better (still not at full speed)- but then obviously the battery must have gotten warmer from the 7Celcius it started at.
To understand this i guess one would need to know how the bike balances and what triggers balancing.
Anyway, if the bike has these issues, changing firmware might help (if the issue is a bike not balancing batteries when it should), but that is in the long run, not for the next ride.
Author
Topic: 2017 EsseEsse9: “Underfined Fault” (Read 924 times)