Weird Message - WattCat

2857 Views 28 Replies 8 Participants Last post by bitzerj, 11 mo ago

bitzerj

Discussion Starter · Apr 19, 2022

I got a message today that after a full charge my battery capacity was low. In WattCat, under Charging, on the top it says 75.05kWh and Full 100%.

Does this mean that instead of the normal 85kWh, I only have 75? If so, does this warrant a dealer visit? I hope not, because it feels like a long stay at the "Vet"

Any help would be appreciated.

1 - 20 of 29 Posts

Ayepace

· #2 · Apr 19, 2022

It does mean a vet visit is in order. WattCat is relaying the information from the Jaguar servers and that is information that came from the cat itself.

Any unusual conditions at the time of charging? Cold temperatures? What charging equipment was used?

bitzerj

Discussion Starter · #3 · Apr 19, 2022

Noooooooooo

Home L2 Charger (Wallbox Pulsar Plus). Normal temps. Just a boring charge..nothing funky.

I will call them tomorrow. Ugh.....

Thanks for the help!!!

sciencegeek

· #4 · Apr 19, 2022

@bitzerj what was the likely battery temperature? 75kWh is possible in a healthy battery, but it would have to be very cold.
Also, what did WattCat show as the "optimized" percentage in the Charging screen?

bitzerj

Discussion Starter · #5 · Apr 19, 2022

The garage temp was ~60F and the Optimized number is 87%

jsimon7777

· #6 · Apr 19, 2022

Give me your phone number. I'll leave you a weird message. Or three.

That is not cold.

sciencegeek

· #7 · Apr 19, 2022

Yeah sorry, that's a trip to the dealer where they need to give you a full battery state of health report, generated by Pathfinder, where every module ("cell" as they call it) is listed with their SoH percentage. Post it here when you get it from them.

Reactions: 1

bitzerj

Discussion Starter · #8 · Apr 19, 2022

This will be my first experience with my dealer's service. Wish me luck! I have a feeling I will be needing it.

bitzerj

Discussion Starter · #9 · Apr 19, 2022 (Edited)

Another question. None of the Official Jaguar apps, or the car threw an error message. I'm anticipating some blowback from the dealer on doing anything because of a 3rd party app message. I want to get my ducks in a row before calling them. Do you have any suggestions on how I should present the issue?

dernotte

· #10 · Apr 19, 2022

If you don't want to name any 3rd party product, you can simply open this URL in your browser : https://ipace.herokuapp.com/static/param.html , sign in with your credential, and print the result . Look for "EV_RANGE_VSC_REVISED_HV_BATT_ENERGYx100" , this is the reported kwh in your battery. You can tell your dealer that those key/values comes from JLR servers, and are reported by the car.

bitzerj

Discussion Starter · #11 · Apr 19, 2022

Nice! Thanks a Million!!!

bitzerj

Discussion Starter · #12 · Apr 19, 2022

I get this...the car tells me there is 70% left

EV_RANGE_VSC_REVISED_HV_BATT_ENERGYx100

50.9

Does the 50.9 = 50.9Kwh

I'm going to do another full charge and check it again

Thanks again!

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dernotte

· #13 · Apr 20, 2022

Yes, it does.

bitzerj

Discussion Starter · #14 · Apr 20, 2022

FYI - 75.1 at a "Full Charge"

Hammer

· #15 · Apr 20, 2022

What would be the acceptable charge capacity at full charge before it becomes a concern, and capacity warranting a trip to the vet?

bitzerj

Discussion Starter · #16 · Apr 20, 2022

Just got back from the dealer and I gave them a printout of the data (Thanks dernotte!). The car is scheduled for a check in early May. I asked them about the Cell Check, and they said typically if they have reason to doubt the battery, Jaguar is telling them to swap the entire pack.

I will update you once the service starts

sciencegeek

· #17 · Apr 20, 2022

JLR will probably not go for a pack replacement because you're only down about 10-15% capacity, not 30% which is the threshold for the warranty to kick in (though it's not entirely clear how they establish the 70% threshold; they refer to "State of Health", which is a nebulous concept, not capacity).

Another thing to try is to see if you can tabulate your trips and calculate your actual range (under 'normal' driving conditions).

bitzerj

Discussion Starter · #18 · Apr 21, 2022

Under normal driving conditions, I'm averaging under 200 miles. The Guess-O-Meter says 201. My trips are between 35 to 40 kWh so at 75.1 kWh it makes sense.

Qtown charger

· #19 · Apr 23, 2022

bitzerj said:
The garage temp was ~60F and the Optimized number is 87%

When I saw this post last week I was intrigued as to what WattCat reported regarding my battery. A few months ago I posted some observations regarding the capacity of our batteries (L2 charging, battery performance and longevity - a few...), so I felt that I had a good handle on my battery (down ~7-8%).
After reading this post I checked the optimized value for my battery in WattCat and got a number of 88%. Today after a full charge the optimized % is 100.
I believe this number is based on the efficiency and usage data reported by the car to JLR, so no complaint meant regarding WattCat, but this number appears to be highly variable. I also find the logged journey data to be inconsistent and when summed over a charge cycle to give usage that varies by at least 5% from charge cycle to charge cycle.

Your range of 201miles and the reported capacity of ~75kWh, does seem low, albeit within the parameters that JLR established in the battery warranty. How long have you been seeing these numbers? I find the battery capacity to vary by up to 5kWh depending on the temperature when charging.

A check by the dealer hopefully will clarify the issue, but be aware Li ion batteries do degrade over time, irrespective of use, so an early 2019 might expect to show some degradation.

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bitzerj

Discussion Starter · #20 · Apr 23, 2022

Qtown charger said:
When I saw this post last week I was intrigued as to what WattCat reported regarding my battery. A few months ago I posted some observations regarding the capacity of our batteries (L2 charging, battery performance and longevity - a few...), so I felt that I had a good handle on my battery (down ~7-8%).
After reading this post I checked the optimized value for my battery in WattCat and got a number of 88%. Today after a full charge the optimized % is 100.
I believe this number is based on the efficiency and usage data reported by the car to JLR, so no complaint meant regarding WattCat, but this number appears to be highly variable. I also find the logged journey data to be inconsistent and when summed over a charge cycle to give usage that varies by at least 5% from charge cycle to charge cycle.

Your range of 201miles and the reported capacity of ~75kWh, does seem low, albeit within the parameters that JLR established in the battery warranty. How long have you been seeing these numbers? I find the battery capacity to vary by up to 5kWh depending on the temperature when charging.

A check by the dealer hopefully will clarify the issue, but be aware Li ion batteries do degrade over time, irrespective of use, so an early 2019 might expect to show some degradation.

How long have I seen the numbers....not sure, I really didn't give it much thought. I figured my mileage was low due to the cold weather and me driving like an idiot

. It was only when WattCat threw a warning message that I paid attention. My car is a 2019, but it was on the dealer lot up until a year ago. It only has a year of constant use. When I picked up the car, it has 711 miles and I'm the first owner.

As I said previously, I will let you know how it goes. My drop off date is May 9th!

1 - 20 of 29 Posts

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