Battery degraded to 80%

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Abu Dhabi Dude
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Re: Battery degraded to 80%

Post by Abu Dhabi Dude » Sun Jul 19, 2020 7:29 pm

i-Tray wrote:
Sun Jul 19, 2020 7:07 pm
Thanks. Yes, I checked the Remote app and it said 'fully charged' yet the green battery charge bar in the app showed only 80% of the bar filled. I have checked the bill from charge point and it shows the 'charge stop time' matches when I disconnected, so I don't think there was a problem with that. But on my next charge I will try what you've suggested to make sure there isn't something pausing the charge.
Ah ok. This sounds like a different issue then, and may indicate a battery problem. But it’s worth trying any of those processes to restart the charge, just in case. Also worth checking the reported kWh in WattCat or MyPace to see if it’s reporting the expected 84-86 kWh. May help pin down whether it’s a battery issue or a calibration issue.

i-Tray
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Re: Battery degraded to 80%

Post by i-Tray » Sun Jul 19, 2020 8:32 pm

Abu Dhabi Dude wrote:
Sun Jul 19, 2020 7:29 pm
...worth checking the reported kWh in WattCat or MyPace to see if it’s reporting the expected 84-86 kWh. May help pin down whether it’s a battery issue or a calibration issue.
Right, downloaded Wattcat on my son's android and the data does not look promising. If I'm reading this right it looks serious. 35.5 kWh at 78% suggests the battery has only 45.5 kWh, nowhere near 84-86 kWh.

Wattcat small.jpg

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ELray
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Re: Battery degraded to 80%

Post by ELray » Sun Jul 19, 2020 10:30 pm

That’s not an uplifting value.
If your able, try to drive it close to 0 and then slow charge it up to full.
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elbocko
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Re: Battery degraded to 80%

Post by elbocko » Sun Jul 19, 2020 10:35 pm

Screenshot_20200719-222954_WattCat.jpg

Sorry but this is mine. I agree with ADD and others; needs the dealer to check it.
El Bocko

E 2ERO, SE, Firenze Red, MY19, 18". Still loving it.
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Abu Dhabi Dude
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Re: Battery degraded to 80%

Post by Abu Dhabi Dude » Mon Jul 20, 2020 12:26 am

i-Tray wrote:
Sun Jul 19, 2020 8:32 pm
Right, downloaded Wattcat on my son's android and the data does not look promising. If I'm reading this right it looks serious. 35.5 kWh at 78% suggests the battery has only 45.5 kWh, nowhere near 84-86 kWh. Wattcat small.jpg
That doesn’t look good to be honest. I would suggest trying what Elray suggested. Run it down to as close to zero as you can, then plug in and charge it all the way to full in one session (on an AC home charger, not a public DC rapid charger). It’s possible that will recalibrate the system and allow a full charge. If that doesn’t work, it’s a dealer visit. To be honest, I suspect it won’t help but if it was me, I’d try it.

sciencegeek
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Re: Battery degraded to 80%

Post by sciencegeek » Mon Jul 20, 2020 4:19 am

Oh ouch. I agree that does not look good. I agree with Elray and ADD. I would definitely make an appointment with the dealer (which won't happen right away, right?) and noodle it down and charge back up before you bring it in so that you can give them the data. If you can, here's what I would do:

1. Discharge. Drive it and for each trip:
1.a. Record the WattCat readings (kWh and %SoC) at the end of each trip. Put each entry into a spreadsheet.
1.b. Download the Journey data from the JLR Remote web site; that gives you distance and consumption.
1.c. Do some math (if it's not obvious I can help)
2. Charge
2.a.Take periodic readings with WattCat as to the kWh and %age (like every half hour). Put that in a spreadsheet too.
2.b. See 1.c. above
3. You're saying that you use public L2 chargers; is there one that gives you a readout of the kWh added? If not, go to a fast charger and document the session, recording 5 min timepoints with %SoC and kWh added. If the battery was close to empty, you charge it to full, and you only added 50kWh (for example), that bolsters the case that the battery can't accept the amount of charge it should.

Then you go to the dealer armed with data and they will have to do this for themselves, but the goal is to know your data and be able to argue your case with the dealer (who will probably believe you) and JLR (who will hopefully help get it fixed). In the US there are buyback laws and I benefited because I recorded the defect meticulously.

SammyD
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Re: Battery degraded to 80%

Post by SammyD » Mon Jul 20, 2020 7:50 am

The more data that you have to show the dealer (and in turn JLR Tech Support) the better.
Record the times and the energy reported by the car AND how much was supplied by the charger.

I did this before taking my car into the dealer. I made sure that I got to speak to the technician who is trained to service the battery. We went through the figures and he agreed that there was something not right with my battery. They did all the tests and found that 3 cells were faulty. These were replaced unter warranty. I introduced the technician to WattCat who when I got the car back, agreed that it was very useful and that it confirmed the figures that his test kit was saying.

Be patient. Your dealer has to go through a whole series of tests and safety procedures when dealing with the HV battery. This includes several charge/discharge cycles. If you see your car being driven well away from the dealer don't fret, they need to get rid of some of the energy stored in the battery somehow.
If there is a problem then it will be rectified under warranty (not goodwill as for some other makes). My last full slow charge showed 83.1kWh at 100%. A big difference from before the car went in when it showed 64.3kWh capacity.
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Maxwell_400
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Re: Battery degraded to 80%

Post by Maxwell_400 » Mon Jul 20, 2020 8:35 am

Jelle v/d Meer wrote:
Sun Jul 19, 2020 5:12 pm
My MY2019 has done 53,000km, have DC charged at 100kW+ charger around 90 times, have been near or below 0% SoC about a dozen times, I done my fair share of traffic light sprints, 200km/h stints and driven multiple laps on a race track so plenty of stuff that would degrade the battery faster however when fully charged WattCatt shows still above 84kWh loaded and GOM shows around 450km range.

Only bad thing for battery health that I am not guilty of is that It has never been fully charged for more than 36hrs or below 20% for more than 4hrs.
When you charge on Ionity, what is the voltage at 100% ? 80%?
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Jelle v/d Meer
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Re: Battery degraded to 80%

Post by Jelle v/d Meer » Mon Jul 20, 2020 9:51 am

Maxwell_400 wrote:
Mon Jul 20, 2020 8:35 am
Jelle v/d Meer wrote:
Sun Jul 19, 2020 5:12 pm
My MY2019 has done 53,000km, have DC charged at 100kW+ charger around 90 times, have been near or below 0% SoC about a dozen times, I done my fair share of traffic light sprints, 200km/h stints and driven multiple laps on a race track so plenty of stuff that would degrade the battery faster however when fully charged WattCatt shows still above 84kWh loaded and GOM shows around 450km range.

Only bad thing for battery health that I am not guilty of is that It has never been fully charged for more than 36hrs or below 20% for more than 4hrs.
When you charge on Ionity, what is the voltage at 100% ? 80%?
I only charged to 100% once at Ionity (see attached) but that was at an ABB Ionity charger so only shows SoC %, time charging and kWh charged.
My experience is that in terms of voltage it is just below 400 when the charging sessions starts and than over time slowly climbs to 420-430 volt as SoC % goes up and sadly amps goes down.
Have actually not paid much attention what it is when charging at 80% or higher.
Ionity Charging Session.xlsx
(716.37 KiB) Downloaded 24 times
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i-Tray
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Re: Battery degraded to 80%

Post by i-Tray » Mon Jul 20, 2020 9:54 am

sciencegeek wrote:
Mon Jul 20, 2020 4:19 am
...the goal is to know your data and be able to argue your case with the dealer (who will probably believe you) and JLR (who will hopefully help get it fixed). In the US there are buyback laws and I benefited because I recorded the defect meticulously.
This is great advice. Thanks so much. I've checked all my fluids too (no faults there) and now started running it down so I can follow your advice. Thanks again, really appreciate the advice!
First Edition, Photon red, 22" wheels.

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