Reduced battery capacity to 64kWh

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EV-Buddy
Posts: 18
Joined: Mon Dec 03, 2018 9:43 pm
Location: Leicestershire, UK

Reduced battery capacity to 64kWh

Post by EV-Buddy » Sat Sep 26, 2020 9:20 pm

I noticed that the capacity of my High Voltage battery on my 22 month old IPace SE had dropped to about 64kWh In WattCat when fully charged. This was accompanied by a drop in maximum range to 170 miles. The GOM would show 212 miles at full charge and then 50 miles just disappeared as I was driving. I decided to keep an accurate record of energy added when charging from almost empty and from half full as as well as other points such as at a quarter. This gave me data that confirmed the capacity reading on WattCat. I took this data to my dealer and discussed this with the iPace technician who then confirmed a battery fault after running tests with guidance from Jaguar Technical.

My car was shipped to a different dealer who had the tools to work on the high voltage battery. They confirmed that Cell number 33 was faulty. This was replaced under warranty. WattCat now shows 84kWh when fully charged. The GOM now displays 235 to 250 miles at 100% and is much more accurate. I have driven 170 motorway miles without charging on three occasions now with the GOM showing 60 to 80 miles remaining. I can now do long journeys with much more confidence which is important with the fragmented UK public charging infrastructure.

If you are having similar issues, my advice is to document your charging records as described above before approaching the dealer.

Jaganon
Posts: 58
Joined: Fri Oct 26, 2018 5:43 pm
Location: Croydon

Re: Reduced battery capacity to 64kWh

Post by Jaganon » Sun Sep 27, 2020 8:36 am

Thanks for posting EV-Buddy. Mine is in the repair shop with this issue now and it’s great to read your happy conclusion. I’m looking forward to testing out the car upon its return.
I Pace FE MY19 delivered 30.10.18: Santorini Black, Oyster, 22” Carbon
18.2

EV-Buddy
Posts: 18
Joined: Mon Dec 03, 2018 9:43 pm
Location: Leicestershire, UK

Re: Reduced battery capacity to 64kWh

Post by EV-Buddy » Sun Sep 27, 2020 7:36 pm

Jaganon wrote:
Sun Sep 27, 2020 8:36 am
Thanks for posting EV-Buddy. Mine is in the repair shop with this issue now and it’s great to read your happy conclusion. I’m looking forward to testing out the car upon its return.
Thanks. I hope your’s is sorted too. Did they confirm that you have damaged cells?

NigelC
Posts: 114
Joined: Tue Nov 05, 2019 10:06 am
Location: Cornwall

Re: Reduced battery capacity to 64kWh

Post by NigelC » Sun Sep 27, 2020 8:13 pm

I had the same problem with our car, just after H264 was released. I couldn't understand why our mileage was so pitiful.

Ended up getting a Samsung Tablet just so I could get the WattCat app, and logged my journeys and beginning and ending Stateof Charges.

Armed with that information I discussed matters with my dealer. They were brilliant and after diagnostics confirmed that one of the cells was indeed faulty.

The repair was done under warranty, with no fuss whatsoever. I remember when I went to collect the car reminding the service assistant that I had to settle up for the insurance on the loan car,only to be greeted with smile and "Oh we don't need to worry about that do we!"

Being rather new to an EV at the time, I received some very helpful advice from a couple of forum members, which I am happy to pass on.

Hope you get things sorted out.

Kind regards,
Nigel
MY 20 SE Corris Grey
Delivered 09/19
H264, H270, 20C

Jaganon
Posts: 58
Joined: Fri Oct 26, 2018 5:43 pm
Location: Croydon

Re: Reduced battery capacity to 64kWh

Post by Jaganon » Mon Sep 28, 2020 3:10 pm

Thanks. I hope your’s is sorted too. Did they confirm that you have damaged cells?
[/quote]

No not yet, but Jaguar tech are working with the dealer at present. It’s been a slog to get to this stage and hopefully I’ll be notified of the problem soon.

Interesting to read of Nigel C’s dealer’s approach. They’re a keeper.
I Pace FE MY19 delivered 30.10.18: Santorini Black, Oyster, 22” Carbon
18.2

stok40
Posts: 10
Joined: Tue Sep 29, 2020 5:06 pm
Location: Greece

Re: Reduced battery capacity to 64kWh

Post by stok40 » Tue Sep 29, 2020 5:16 pm

I am facing the same issue. No error warnings at all, but suddenly noticed in August that range was not what is should have been according to the trip computer. Wattcatt showed a gradual degradation in battery capacity, i.e. around August 1 it was like 75kwh when full, August 15 it was 69 until I was getting something like 64 when full. A visit at the dealer a couple of weeks ago confirmed that module number 11 was bad and needed replacement. I am still waiting for the central to send the replacement module.
If I understand correctly from your posts, the replacement module was readily available and send to your dealer relatively fast; my dealer doesn't have previous experience with such an issue and couldn't comment on how long it would take until the module arrives. Can you tell me how much you had to wait until the module arrived from the factory?

It is definitely good to know that everything went fine for you guys, it sure gives me hope; I was worried that once one module in the battery goes bad others will soon follow. At least that's the thing with lithium batteries in other devices like smartphones. But maybe JLR managed to have the modules "working" separately from one another and once a module goes bad the others are not affected. Only time will confirm whether this is actually the case or not. I would appreciate any comments.

Fluff
Posts: 146
Joined: Thu May 21, 2020 9:26 pm
Location: UK

Re: Reduced battery capacity to 64kWh

Post by Fluff » Tue Sep 29, 2020 6:06 pm

I-pace is 36 modules, just consider it as 36 batteries, one is bad, the BMS will manage that module, i,e, out of use, hence lower capacity, and once changed, and balanced, you should be good to go.

Jaguar or a supplier, may eventually open up that module, and replace the individual cell, and return the module to the spare stock, for the next customer.

Same happens with ICE, engines, gearboxes, they are not thrown away.
I-Pace SE 2019[Everything BLACK] Santorini,Pano, 20' BLACK,winter pack, adap cruise.

stok40
Posts: 10
Joined: Tue Sep 29, 2020 5:06 pm
Location: Greece

Re: Reduced battery capacity to 64kWh

Post by stok40 » Tue Sep 29, 2020 8:00 pm

Thanks for your comment Fluff, this is reasonable.
Building on this thought, maybe it would be possible in the near future to replace individual cells with higher capacity ones that would be lighter and take less space, and then we could be talking about a "tuned" 120 or even 150kwh ipace... Once repair guys have the know-how to do it!

Would still appreciate any comments on my previous post by anyone that faced the same issue.

SammyD
Posts: 1195
Joined: Sat Oct 13, 2018 7:44 pm
Location: N.E Hampshire, UK

Re: Reduced battery capacity to 64kWh

Post by SammyD » Tue Sep 29, 2020 8:08 pm

Replacing a cell in the I-Pace battery pack needs some specialised tools. Many dealers won't spend the money on them but will have informal agreements with other dealers to do this sort of work. After all, JLR are paying for it.

As for more cells going bad after the first one. This is the big unknown. However one cell going bad inside the first year of use would not be out of the ordinary given the state of battery technology. I wouldn't worry about it. You have the warranty and once you have had one changed then doing a second will be easier but inconvenient due to not being able to use the car.
The dealers are on a learning curve with the I-Pace. There is a lot of new tech for them to get to grips with in the I-Pace. As time goes by this won't be an issue.
Driving "Hirundo Rustica" since 15th Mar 2019. Lovely Jubbly :D :D
S20C since 11th Dec 2020 Maps : whatever is current/can be bothered to download

NigelC
Posts: 114
Joined: Tue Nov 05, 2019 10:06 am
Location: Cornwall

Re: Reduced battery capacity to 64kWh

Post by NigelC » Tue Sep 29, 2020 8:56 pm

stok40 wrote:
Tue Sep 29, 2020 8:00 pm
Thanks for your comment Fluff, this is reasonable.
Building on this thought, maybe it would be possible in the near future to replace individual cells with higher capacity ones that would be lighter and take less space, and then we could be talking about a "tuned" 120 or even 150kwh ipace... Once repair guys have the know-how to do it!

Would still appreciate any comments on my previous post by anyone that faced the same issue.
I think I must have been incredibly lucky (or unlucky, depending on how you look at it). I contacted our JLR dealer at the end of January and the car was booked in for repair during the middle of February. They had the car for a week, during which time the replacement cells were shipped down to Cornwall installed and tested.

Image

Not had an issue since, and recently during the warm weather GOM (not that anyone would put that to the test) at full charge has been in excess of 260 miles.

The story doesn't end there though. I'm a keen runner and on one of my runs a couple of months ago I noticed a very dirty (absolutely filthy iPace). I ended up chatting to the couple who had left the car and told them that I also had an I-Pace. It turned out that he was the Managing Director of the group of Garages in Cornwall that also included JLR. I told him that we had been seriously impressed with the way that our issue had been dealt with and was pleased to actually tell him the name of the mechanic in the photo who had carried out the repair.

I then asked him why his car was so filthy, and his wife started laughing - apparently due to the lockdown, he didn't have a minion at head office to wash it for him!

The dealership covers VW, Audi, BMW, Peugot, JLR, Maserati and Mini - so given the range of cars for him to drive, it's interesting that he chose to drive an I-Pace!

Before our car went in for its repair I had been logging the distance driven, and the State of Charge % before and after every trip. Before the faulty cells were replaced I was averaging 1.2% of battery consumption per mile. Given that the iPace battery is approx 94 kWh this would give a range of less than 80 miles. After the faulty cells were replaced we started averaging less than 0.5% battery consumption per mile, which is way better. I stopped logging my miles at the end of March, and hadn't given it another thought since.

Hopefully this might give you some hope for a speedy resolution.

Kind regards,
Nigel

photo 2.jpg

MY 20 SE Corris Grey
Delivered 09/19
H264, H270, 20C

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