Degradation at 37k miles...

I am wondering how the torque software knows the actual SOC is 97%.


Sent from my iPhone using Inside EVs

 

It just displays what the actual BMS is reporting as SOC. BlueKona, if its helpful to you my BMS reported SOC when my battery was literally brand new was 95% and is currently at 96.5% 10 months and 16,000 km later.

 

It's not really 20% "degradation", as you noted it's 20% of the margin until degradation starts to affect range. You could consider that Hyundai "warranty" a loss where the battery has under 70% capacity, a fairly extreme degradation. On that basis you have 35% total and you've used 2%, so you could say your degradation is about 6% of that which Hyundai consider acceptable.

As an added note, I do find it interesting that your cell voltage at 100% SoC-disp is still at 4.16 V, the same as it would have been when new. Where is the margin being used up?

 

I don't think bluekona was saying it was 20% degradation rather he was making a linear prediction of what degradation might be at 370,000 miles.

 

From my observations on my car pre BMS update Torque Pro reported 94.5% SoC BMS, 100% SoC display. Immediately after the BMS update to my car Torque Pro reports 96.5% SoC BMS, 100% SoC Display.

So I'm guessing that Hyundai "pinched" a little bit of the head room to achive the slightly higher published range figure!

John.

 

Ah, didn't spot that...

The battery's 'odometers' are reset to zero when the update is applied so the SoC numbers may not be totally reliable until some history is acquired.

 

I like your Torque Pro screens, just got it for my Kona. How can I show every individual cell.

 

I am new to Torque Pro, just got it. How do I select & display all 98 cell groups? I have some basic displays working with extra PUD files, but did not see display for each cell group. Thx

 

Of note... the BMS can also report the highest and lowest cell voltage, which is far less to have
to read. It also reports *which* cells are the high and low, which in a healthy pack jumps around
because thd cells should be as close as possible. So I only bother reading those 4 numbers.

I haven't seen deltas larger than 0.02V, and the high/low N does change but tends to "stick" in
some places just due to the order in which the BMS internally scans the taps.

_H*

 

Could the "degredation" be anything to do with the Kona actually having a 71kw battery? I wish now I had a reading from day 1.