What does my PB+ battery look like?

[Raphie]

I took these screenshots with Carscanner. According to math a BP+ @ 100% should show around 430km (19.5kWh/100km avg usage) but I never see more than 355 when fully charged in optimal conditions, welcome your thoughts based upon the graphs.
Carscanner sees 33 modules * 6 cells is 198 cells? If I’m reading this correctly?

Sponsored

 

[Pope]

PB+ has 396 cells (PB has 336) - each of the modules has cells arranged 6S2P; there are 28 modules in a PB, 33 in a PB+

I haven't looked at Carscanner data before; lots to see.

 

[SergeyIndy]

I scan every 1k miles and this is what I am looking for:

Cell Graphs: you are only showing Cell Voltage, so you need to look at Cell SoC graph, which would give you an idea if you have any outliers which would tell me that some cells may be going bad. You only need 1 bad cell to go into Red Circle of death.

Then you look at this:
Battery Energy / SoC Display = Actual Usable Battery Energy at 100%

54.55 kWh / 71.5% = 76.29 kWh which is consistent with expected.

 

[gtm]

This is just a couple of observations (I'm no battery expert):
PB+ starts with 86.7 kWh usable capacity. At your state of health (88.52%) that gives you 76.75 kWh available now. 54.5 kWh available energy @ 70.98 SoC (both from your screenshot) calculates to 76.78 kWh @ 100% charge. So those two views of your capacity agree. Not sure where your 19.5 kWh/100 km comes from but that would give you a theoretical range of 393 km.

At 355 km range @100% it looks like your consumption is actually 21.6 kWh/100 km.

Your voltage min/max diff of 19mv is a little high (barely) and you might recover a little capacity if you did a rebalancing (SoH might increase to mid 89%, possibly 90%).

Otherwise, for a 2021 car with 30,000 (?) km on the odometer your battery doesn't seem unusual and your range decent.

 

[Raphie]

I’ve now got 60k km’s on it, the 19.5 is lifetime avg, real life is more like 21-22 indeed, 21” RS spyder

 

[gtm]

54.55 kWh / 71.5% = 72.63 kWh which looks on the low side for 88.52% SoH, why, because we know from real world data that when new PB+ battery energy is 86.7kWh x 88.52 SoH (yours) = 76.74 kWh, so you are missing 76.74 kWh - 72.63 kWh = 4.11 kWh somewhere.

@SergeyIndy - check the math on your "54.55 kWh/71.5%" Should be 76.3 kWh @ 100%. No missing kWh's.

 

[gtm]

I’ve now got 60k km’s on it, the 19.5 is lifetime avg, real life is more like 21-22 indeed, 21” RS spyder

If you are getting the 19.5 lifetime from the app it's pretty much a fictional figure. Many people have reported lifetime app numbers pretty far from reality. 21-22 kWh/100 sounds about right for your 355 km range at 100%.

 

[SergeyIndy]

@SergeyIndy - check the math on your "54.55 kWh/71.5%" Should be 76.3 kWh @ 100%. No missing kWh's.

Apologies, I did not calculate it right, and deleted my 4kW missing. Nothing is missing, thank you for correcting.

 

[gtm]

Apologies, I did not calculate it right, and deleted my 4kW missing. Nothing is missing, thank you for correcting.

I was shocked to see you post an incorrect figure. Most unlike you. At first I thought it was my calculator.

 

[SergeyIndy]

I was shocked to see you post an incorrect figure. Most unlike you. At first I thought it was my calculator.

Agree, I messed up.

Sponsored