VW ID.3

A little update on the Tour 5 battery capacity.

@32,000 Kms

74.400 Kwh ( max capacity ) @21 deg Battery temp.

@36,350 Kms

@100% charge and @17.5 Deg C battery temp, available capacity (100% charge according to dash) 67.950 Kwh and Max Capacity 73.500 Kwh

@100% charge on the dash real charge is 95% which would be pretty normal I suppose as it holds back some capacity which it's telling me is 5%.

The difference in total capacity I would assume is related to the difference in battery temp.

Interestingly it tells me "dynamic limit for charging 131 Amps" which I assume to mean is the limit for fast charging which at what 440 volts would be

around 57 Kw which would tie in with the max I've seen at ionity of 60 Kw.

Cell voltages are spot on so no weak cells, all around 4.15 per cell.

Although, weak cells can also only make themselves known under load and at lower states of charge and can show perfectly equal voltage to the rest of the cells at 100% charge.

So moral of the story is loss is showing in under 5% over 10.5 months and 36,350 Kms, the car was built in July collected mid October.

The BMW i3 showed no loss what so ever after nearly 5 years and around 140,000 Kms.

From taking the battery reading the other day this is What I have observed, seemingly the BMS is holding 5% on top of the other buffer, so the 82 Kwh leaves you with77 Kwh but you seemingly have 5% less than that so when new it appears that only 69.3 Kwh.

At 100% charge it shows SOC display 100%, SOC BMS 95% that's when fully charged.

Now after nearly 11 months ( where did the time go ? ) and nearly 37,000 Kms says I have 73.5 Kwh as max energy content of the traction battery and 67.950 Kwh.

"max energy content of the traction battery" means what kwh you have at a particular charge % which in my case was fully charged.

so when new looks like 73 Kwh is only available out of 82 Kwh.

Now I have 67.95 Kwh when fully charged including 5% withheld on top of the other buffer.

I'm at 37K Kms and still have some thread left on the rear.

Have you called the dealer ? I just sent an email asking if It can be booked in again since they cancelled, maw ya they can't get the 12v battery, probably more to do with the fact there was issues with updates.

I've requested a battery check because it seems to be loosing capacity far faster than I had thought, now, I know, I'm basing that on the BMW i3 which lost absolutely no capacity in 4 years and 143,000 Kms but all the same no harm to have it checked out.

I want to know why I only have 67 Kwh available from 73.5 total available capacity, when fully charged it shows 100% but the BMS is set to charge to 95% of the available 73 Kwh and I find this puzzling.

At the end of the day after nearly 11 months and 37,000 Kms I have 67 kwh available out of an 82 Kwh battery, 77 Kwh available new but really only around 73 Kwh since it won't give you that 5% when fully charged.

Not really happy about the extra capacity being withheld to be honest. If the battery degradation continues at this rate I'll have lost 12 Kwh after 3 years giving me 65 Kwh capacity and 61.5 Kwh available. Still plenty for most I'm sure but to make the point again that the BMW i3 33 Kwh didn't loose as much as a Kwh in 4 years, actually the car was 4 years 7 months old and 143,000 Kms.

I'd be interested Fitz to do a report on your battery ? and anyone else who would volunteer or get the dongle and app themselves ?

The more data we have the better for all models.

It's a pity I didn't do a test when I got the car.

All cell voltages are spot on no imbalance.

It does seem that 77 Kwh was the max available battery capacity at the start from what I have read and seen similar data using same app so definitely capacity loss, so now I have 73.5 Kwh available max.

But for the beginning it appears that no matter what capacity you have charging to 100% only charges to 95% of that max available capacity which in my case is not 73.5 Kwh which leaves me only with 67 Kwh when fully charged because of that 5% the BMS.

Not really happy about that.

I'll know more on the way home from this blanch site, charging up at 11 Kw now from 12 % when I plugged in around 5:10 am, I know any capacity loss in reality will be small but it's degrading faster than I had anticipated.

Only I'm too mean I would drain the battery until the car stopped close to home of course and plug in and see what the charge point pulls from the grid.

Goodyear Efficient Grip Performance but I find them quite a noisy tyre to be honest, grand on the resurfaced M7 and N7 which is a proper road Surface.

But got around 37,000 Kms on the rear now, need replacing soon.

I always think replacing modules is a bad idea they have to be too closely matched with identical internal resistance and voltage and age.

Well hopefully they fix it soon and it turns out alright.

Do you plan to keep it long ?

I'm quite surprised at how much capacity was lost in 11 months. Do I notice it ? probably not yet.

Yeah I'm thinking I'll be keeping mine a good while longer too but 5% battery degradation in less than a year worries me, 15% after 3 years if the trend continues which means I'll have around 58 kwh usable after 3 years out of 73 Kwh when new inc the 5% withheld when fully charged. It's still plenty for most people but in fairness is it what we really should expect in a modern EV this level of degradation ? "it's still plenty until you want to drive the longer distance, you pay a lot more for the extra battery capacity for to end up with the usable Kwh of the 58 Kwh and in 3 years ? f1ck that !

God only knows what 58 Kwh owners will end up with at that rate, I calculate 46 Kwh usable inc the 5% withheld when fully charged.

As I said above, I was probably expecting far too much after the BMW i3 so yeah you'd expect some degradation but wasn't expecting so much. We'll see what happens after the software update.

I'm too mean to run it to empty and charge it on my own electricity lol. Might have to do it though, the wallbox records the Kwh sent to the car but that would be total energy including inefficiency.