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I'm proposing to charge my car to 100% tonight, pending a long journey on Monday. Is it OK for this (100%) to stand or should I only charge on the evening before the journey?
TIA
Lawrence
TIA
Lawrence
Max charge 100% - OK for 2 days?
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I wouldn't.
But if its a rare event it wouldn't matter too much in the great scheme of things. The issue for the battery is how much of its life it spends at 100%.
But if you have the means to charge it on Sunday, why would you charge it tonight? Its a minimal risk to the battery's health but an avoidable one.
But if its a rare event it wouldn't matter too much in the great scheme of things. The issue for the battery is how much of its life it spends at 100%.
But if you have the means to charge it on Sunday, why would you charge it tonight? Its a minimal risk to the battery's health but an avoidable one.
It might have started fine but it's very likely you did the battery no favours at all being sat at 100% for 3 months. The fact it started fine is not an indication that it was not a problem to do that.
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The only problem with Sunday/Monday is that we are leaving early and I dare not forget anything - such as wrapping up the cable and stowing it in the boot!.Also, the small possibility of an overnight mains glitch that terminates charging leaving me 'stuffed'. Maybe the best compromise is Sat-Sun.
Lawrence
Lawrence
Its Korean…it will be fine for longer than a day.
Why don't you take it up to around 85% tonight or tomorrow night and then top it on Sunday afternoon / early evening before you go to bed. For the last 15%, even if it's at peak rate, you'd only be looking at a couple of extra quid.
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Only charging the night before is better, but as per above comments this will not matter in the great scheme of things. That suggestion of charging to 85% then topping up will give you peace of mind. One less thing to worry about.
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All set. BTW I love this forum - perfect advice from experienced users 
. Rather than set it in the car I used Bluelink to set it to 80%. It only does 80 /90 - not 85%.
Lawrence
. Rather than set it in the car I used Bluelink to set it to 80%. It only does 80 /90 - not 85%.Lawrence
How about the fact after having it for 3 years and 24,000 miles it still provided the same 190 mile summer range?
Don't these Hyundai's have a top buffer?
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I thought I'd check the LG cell docs for this common situation and there are relevant performance graphs but they only go up to 90% SoC(BMS) at a realistic 25°C, and I only have them in monochrome so you can't ascertain which lines are for what SoC. This is actually the 2018-1019 recalled cell but I think the current chemistry is still the same and this data should be equally applicable.
Essentially both temperature over 45°C and higher stored SoC levels both appear to be the main factors that increase degradation. But, the time periods here are in weeks rather than days so you could leave it at 100% (displayed) for 2 days dozens of times before making any measurable difference, noting also that 100% SoC displayed is really only about 95% per the BMS values referred to in the graphs.
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Essentially both temperature over 45°C and higher stored SoC levels both appear to be the main factors that increase degradation. But, the time periods here are in weeks rather than days so you could leave it at 100% (displayed) for 2 days dozens of times before making any measurable difference, noting also that 100% SoC displayed is really only about 95% per the BMS values referred to in the graphs.
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"Started first time" WTF?
The issue is long periods at 100% causing battery degradation, not breaking the car completely!
As in, I was worried it wouldn't even start... And general tales of 12v issues, but neither were an immediate issue.
I understand the question was about long term degradation, but the OP leaving his car at 100% (which isn't 100% anyway), for a couple of days is a non issue.
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Oh I see, fair dos
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IMO unless you've got a first gen EV, I don't think you need to worry too much about letting the car sit at 100% for the odd few days. I wouldn't think twice about it.
Clearly chicken little is alive and well.
Obviously charging the car to 100% for 2 whole days is simply wreckless and will ruin your battery. WTF are you thinking? Why are you charging it at all? Why are you using the car? Don’t you know that the only way the battery will last is to charge it st the slowest possible rate and just leave the battery partially discharged constantly? DO NOT UsE YOUR CAR. Stay at home and invest in a hugely expensive battery monitor and a massive bottle of pills that keep you awake so you never miss a tiny variation in the state of charge and take out a millenium long warranty extension just in case. Above all, WORRY about it. Worry about it a lot. That’s what being an EV driver from 2012 is all about.
Seriously, it’ll be fine.
Obviously charging the car to 100% for 2 whole days is simply wreckless and will ruin your battery. WTF are you thinking? Why are you charging it at all? Why are you using the car? Don’t you know that the only way the battery will last is to charge it st the slowest possible rate and just leave the battery partially discharged constantly? DO NOT UsE YOUR CAR. Stay at home and invest in a hugely expensive battery monitor and a massive bottle of pills that keep you awake so you never miss a tiny variation in the state of charge and take out a millenium long warranty extension just in case. Above all, WORRY about it. Worry about it a lot. That’s what being an EV driver from 2012 is all about.
Seriously, it’ll be fine.
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