[rafsteinberg]

Like many others, I am frustrated with the Jaguar remote app and its inability to set a charge % stop. I am curious if other I pace owners are just allowing the charge to get to 100% or if they actively monitor the charge and stop/unplug when it gets to a certain point (say 90%).

My understanding is that if you regularly charge to 100% you slowly deplete the battery life. Would love to hear opinions/thoughts...

 

[sciencegeek]

Lots of info on this forum on these types of questions ... rummage around a bit, you'll see what people think.
Bottom line, yes, don't routinely charge to 100%; I personally just monitor when it's on my 7kW cable; if you trickle-charge with the supplied 110V cable you have to monitor much less because it charges so slowly ... or you can even set one of those manual timer clock thingies that you plug into the outlet.

 

[Time2Roll]

I would not worry too much about it. Especially in Winter. More an issue if you charge consistently from 90+% to 100% and let it sit. If you are using 65% of the battery on a daily basis then by all means charge to 100% and be ready for the next day. If you are using 10% of the battery each day then charge once a week. As much as charging to 100% and let it sit outside roasting in the Summer heat for days is considered bad form, charging to 100% at least weekly can be good for the battery to balance the cells and reset the BMS.

 

[McRat]

You can't actually charge it to 100%. Notice that it will regen at 100%. A fully charged battery ignites if you force it to overcharge.

 

[Sbingham60]

I fully charge nearly every Friday and sometimes on Saturday when we take longer trips in the car normally between 120 and 150 miles roundtrip. During the week, with just commute time I pretty much don't worry about topping it up.

 

[bruintoo]

So is it bad that I plug in every night and it charges maximum allowable capacity (which I assume is 82.4kWh)? I deplete the battery to about 80% on my daily LA commute. Time charging works in my I-Pace (10pm to 8am), and preconditioning works in the I-Pace, too. I have set my vehicle departure to 8am during weekdays at 72F.

 

[rafsteinberg]

This is somewhat new to me. Others in the Forum can certainly give you a better answer. Having said that, my understanding is regularly charging the battery to full (whether 82.4 or whatever it is) has a negative long term affect on the battery. It is better to charge up to 90% and stop or let it ride down and only charge it up to 100% occasionally.

I have a somewhat similar situation to you... drain the battery by about 20% a day. And I am going to charge on a level 2 every 3rd or 4th day.

Would love to hear other people's thoughts too.

 

[Time2Roll]

So is it bad that I plug in every night and it charges maximum allowable capacity (which I assume is 82.4kWh)? I deplete the battery to about 80% on my daily LA commute. Time charging works in my I-Pace (10pm to 8am), and preconditioning works in the I-Pace, too. I have set my vehicle departure to 8am during weekdays at 72F.

Not a big deal in Winter so enjoy the preconditioning.
When Summer is hitting 90+ I will suggest not charging until you are less than 50% for that regular commute.

 

[alphanstein]

So is it bad that I plug in every night and it charges maximum allowable capacity (which I assume is 82.4kWh)? I deplete the battery to about 80% on my daily LA commute. Time charging works in my I-Pace (10pm to 8am), and preconditioning works in the I-Pace, too. I have set my vehicle departure to 8am during weekdays at 72F.

No, the battery is warrantied to 8 years 100Kmiles something like 80% of rated capacity if I recall, point being, it should not matter how you charge, this is not a stated requirement to keep the battery warranty. Charge to your personal preference and enjoy your vehicle.

 

[sciencegeek]

I keep it between 30% and 70% most days mostly using the trickle charger. If I need a boost I use the Level 2 cable. Yes deep charge-discharge cycles and storage at high SoC are detrimental for long term SoH (state of health) and capacity.

 

[Trielectric]

The I-Pace fully charged kw in the battery is reported to be 84.7kw. The batteries theoretical available capacity is 90kw. This is so the battery's useful life will not be shortened by trying to fully charge the battery to it's max. This is SOP with lithium rechargeable batteries. What's worse is the kw on the lower end of the battery you can never use. I have a Ford Focus Electric rated at having a 23kw battery with a ScanGauge that's plugs into the relic OBD II port. It can pull up the traction battery's state of charge %, voltage, amps, kw available to battery depleted and other electric car stuff. When fully charged my FFE is 90% SOC(20.7kw), kw available is 16kw, I have 4.7kw in the bottom and 2.3kw on the top of the battery's range that I can never use. It uses AC 18.2kw going into the charge port to fully charge from battery depleted(heat loss of 2.2kw). The manufacturers don't want you to claim that battery warranty by preventing you from damaging it. Plug it in and forget it!

 

[dtgsrq]

Like Sbingham60, I "fill up" only when I have a known long-distance (>150 round trip) drive. Otherwise, during the week I bounce between 40% and 85%, using my Level 2 charger (ChargePoint) and generally setting a reminder to unplug at 80-85%. Occasionally I forget to unplug and change to 100% but I don't sweat about it, the car was designed to handle it. I do wish the app or car would allow a SOC stop point, maybe JLR will listen and provide in the future.

 

[JonB]

Someone needs to step up here please as there is an awful lot of relatively uninformed lay man’s guesswork about recharging.

Yes, I know about as much as anyone else who know nothing but has read about the “dangers” of 100% charging, but at the same time, everyone seems to agree that 100% isn’t 100% on the iPace. So just what is wrong with charging to the notional 100% which in reality is only 84 point something of 90kwh capacity? Unless my elementary school math is wrong, which is admittedly quite possible, that means “100%” is actually only about 93.8% in the real iPace buffered battery world, so why not top your vehicle up to that whenever you feel like it?
And keep in mind that JLR warranty the battery for 8 years for 70% capacity so how on earth would they do that if they were not reasonably satisfied that dumbo’s like me who choose to go to “100%” just cause it is simpler and requires the least effort and thought,are not going to cause terrible damage to the battery.

The more techie amongst this and other forum members should keep in mind that mass consumer electronics, including even early adopter ev owners like me, are mostly just regular joe’s without any specialist interest or knowledge, and even though it is expensive as all ****, the iPace’s success or otherwise depends totally on its ability to capture a market of non techies like me, in other words way beyond the techies amongst you, sorry that should be “us”.

So step up a real battery pro/scientist who can explain why charging to 93.3% regularly is a bad idea. Or perhaps the verdict is that it doesn’t matter one bit in the likely life of how long most of us will keep our cars.

 

[sciencegeek]

It's really not complicated.

You can charge to the nominal 100% every time if you want to or need to.
However, if you want to optimize long-term battery health (life) and performance keep the charge centered on 50ish percent.

I've read the scientific literature on the exact type of battery that's in the iPace (Nickel Manganese Cobalt Oxide Lithium-Ion) and that's what it is.

There are other interesting things about these batteries regarding capacity/charging/discharging at different levels of SoC but if that's too technical just ignore it.

 

[JonB]

Yes but what do you mean by “long term battery health”? If you mean there will be significant degradation in my vehicle’s battery health in the next 5 years, which is about as long if not longer than most of us will keep the car, I had better not charge to 100% (which is of course actually 93 or something %) too often or I am in trouble, that’s worth thinking about. If longer than that, to put it bluntly it isn’t going to be my problem so why should I give a **** unless I plan to keep my iPace so that one day it is a classic car but then I will be dead anyway?

 

[sciencegeek]

It's a free country

 

[Mister Dave]

Yes, I know about as much as anyone else who know nothing but has read about the “dangers” of 100% charging, but at the same time, everyone seems to agree that 100% isn’t 100% on the iPace. So just what is wrong with charging to the notional 100% which in reality is only 84 point something of 90kwh capacity? Unless my elementary school math is wrong, which is admittedly quite possible, that means “100%” is actually only about 93.8% in the real iPace buffered battery world, so why not top your vehicle up to that whenever you feel like it?
And keep in mind that JLR warranty the battery for 8 years for 70% capacity so how on earth would they do that if they were not reasonably satisfied that dumbo’s like me who choose to go to “100%” just cause it is simpler and requires the least effort and thought,are not going to cause terrible damage to the battery.

----------------

So step up a real battery pro/scientist who can explain why charging to 93.3% regularly is a bad idea. Or perhaps the verdict is that it doesn’t matter one bit in the likely life of how long most of us will keep our cars.

Disclaimer: Mister Dave is not a real battery scientist. He hates graphs and charts (Battery University link).

Let the car decide what a full charge is. It isn't 100% SOC, but you already knew that. There's no need to fuss, but you'll see plenty of folks fussing anyway. It's in their nature, and there's nothing wrong with that. It makes my eyes glaze over and there's nothing wrong with that either.

Charging to a nominal 50% SOC is likely to help the battery last longer. How much longer is up for debate. It's not enough to fuss over IMO. I've been watching the OCD crowd fuss like this for over 5 years now. It hasn't moved the needle on battery life appreciably AFAICT.

 

[epirali]

Very general rules: a thermally managed battery charging to Max 80% will lose maybe 30-40% capacity over 8 years or 100k miles. That means reduced range. This can be more or less based on temperature of battery (hot is an issue), deep discharge cycles (100% to 0%) and whether battery STAYS at high or low SOC fir long periods of time.

So its complex but ICE vehicles lose horsepower and efficiency and other wear and tear which is not that different. To get a good idea read the warranty for battery from manufacturer, what they consider “normal” degradation.

 

[Calidave]

Yep. Charge it. Drive it. That's what it's designed for.

Concerned (naturally)? Read the warranty. That's your commercial-level buffer.
If Jaguar thought all our unsupervised over-night charging to "100%" was going to prematurely diminish capacity, they would've built-in
a charging supervisory-function to prevent that behavior . . . Simple.

 

[sciencegeek]

I'm planning to keep it a while. I'd rather have 95% capacity in a few years than 85%.

I went through approximately 1000 full charge-discharge cycles on my A3 etron. At the end it had lost about 20% range. The i-Pace probably has better battery management than that plug-in hybrid, but still. I'd rather be at higher capacity after the equivalent of that many cycles. It's not enough of an issue to lose sleep over, however. It's fine if you don't want to think about it and just plug in and forget it.