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[Kappi]

Hey everybody,

on my '17 SR 13.0, I have this weird behavior when travelling at a constant 100 kph.
 When I am cruising at higher speeds, the SOC starts to fall rapidly and the remaining range display drops with a factor of about 2 km for each km travelled.
 On a calm day with flat terrain, the bike will give me about 80 km of range at 100 kph. Once slowed down to city speeds, the remaining SOC will stay konstant for about 4 km, sometimes even rebound by 4-8%.
At lower speeds, though, below 80 kph, the range estimation works fine and I'll have about a range of 120 to 130 kms at a constant 80 kph.

From what I gather from the app, range collapses as soon as the discharge rate reaches or exceeds 0.8 to 0.9 C.

Is this behavior normal?

Thanks for your feedback

Kappi

[stevenh]

It's normal for range to drop quickly as speed increases.  My SR/F will pull a constant around 75KWH/Mi at 40-45MPH, and 130-150KWH/Mi at 75-80MPH, so the range will drop like a brick at higher speeds.  The estimation just tries to do it's best based on what you are currently doing.

Steve 

[AutoE]

How many miles/km on it?  Post you logs here or PM me. 50/50 your battery is failing if SOC is "rebounding". If you can take a more "spirited" ride, do so. We've seen battery drop from 90% to single digits in 10-15miles, then bounce back to over 50%. All needed replacement.

[Kappi]

It has about 4k miles on it. Will download logs and post the next chance I get.
I have taken more spirited rides, but temp control will reduce motor power after 3 miles at 100+ mph.

[DonTom]

The estimation just tries to do it's best based on what you are currently doing.

IMO, range estimates are so useless (especially where there are a lot of hills) that they shouldn't even exist. It can be so misleading if going down hill a lot with the wind in your direction that when you go back, you may run out of range when you discover your range is a tenth of what it said it will be.  I find it is best to not even look at the range left indicator  and do the math in your head based on the SOC & conditions and knowing if you will be going mostly up or down hills and such.

-Don-  Reno, NV

[Richard230]

Also, if you are riding in cold temperatures, your range will drop noticeably faster then in warmer weather. I think you will notice a drop in range, and corresponding SOC per distance traveled, at anything under about 15 degrees C.

[Crissa]

And when you get near the end of a charge, SOC can be less dependable.

-Crissa

[AutoE]

We had batteries with bad cell(s), cell tap issues, etc from under 1000miles.

[Gains]

I suggest to check what your real range is by riding the bike till the SOC is nearly 0 on a flat highway in both directions. When I tested my bike I started with headwind and around 55% I turned back.
If you do this in ECO mode with full throttle you will have a constant speed of 113 km/h and you schould be able to ride more than 100 km. ( Zero stated a highway range of 130 km for an sr 13kwh in 2016 ) if you don t have top or sidecases or a big windscreen on your bike.
The calculation of the range is based on how you have been riding the last few km and the bike can not predict what you will do the following km. It is only accurate if the conditions like terrain ,wind ,ridingstyle etc remain the same,

[Kappi]

I managed to pull the logs.

What I could find so far is a reoccouring error "Low Chassis Isolation", showing up while charging from various cells.
I parsed them but can't upload the txt file due to size issues.

[Kappi]

Range test:
60 km from 98% SoC to 12% SoC in Eco mode at a constant 113 kph. Calm day, flat terrain.

[Gains]

That would mean that you could make 70 km on a charge,at 113km/h. My wife 's 2013 with 9.5 kwh does better.
Do you give it time to balance from time to time? If you unplug after charging and the green charging light stays on the battery is balanced.
You can also check the voltage of your battery at 100% and at 0%

[Kappi]

That would mean that you could make 70 km on a charge,at 113km/h. My wife 's 2013 with 9.5 kwh does better.
Do you give it time to balance from time to time? If you unplug after charging and the green charging light stays on the battery is balanced.
You can also check the voltage of your battery at 100% and at 0%

Thanks for your reply, Gains.
Max pack voltage after charging was 116,821 V, cell imbalance 4 mV.
After the ride, pack voltage was 94.807 V, cell imbalance 36 mV.
Yes, I let it balance, usually the app show 2-4 mV after charging.
The app also said that I had used 8.14 kWh for my test ride (full to empty).
If that 8.14 figure is correct, that would really bring me cloe to your wife's S.
Now I am waiting how much charge the battery will accept over night (OBC with Kill-A-Watt meter)

Update:
Full overnight charge was 11.81 kW from the wall

[motorrad36]

Get your logs to zero and start a warranty claim, sounds like your battery has a bad cell or something...

[Gains]

Get your logs to zero and start a warranty claim, sounds like your battery has a bad cell or something...

I agree ,there seems something wrong with the battery or the BMS
Since your bike is a 2017 ,you still have warranty on the battery.