Charging Best Practices
- Thread starter jwzimm
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Puppethead
Well-Known Member
I find this bit fascinating, it seems to indicate the buffer sizes are modified based on conditions:
But I have a hard time with this statement. If it were true, why wouldn't MINI give us a way to stop the charging at a specified percentage?
When charging multiple times in succession using DC, e.g. during a longer trip, the charging capacity is temporarily reduced as needed to protect the high-voltage battery.
But I have a hard time with this statement. If it were true, why wouldn't MINI give us a way to stop the charging at a specified percentage?
If possible, keep the charge level between 10 % and 80 %.
polyphonic
Well-Known Member
Well, looks like they went back on their old advice from the 2021 manual (screenshots below). The 2023 manual aligns with other EVs and battery expert suggestions (e.g. battery university).
Would be great if they gave us a definable charge limit then?
Would be great if they gave us a definable charge limit then?
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polyphonic
Well-Known Member
That’s how Teslas work, AFAIK.
Zim
Member
We don't have TOU electricity rates, we will schedule the SE to finish charging around 9am, alleviating some of that 100% sitting during the day before driving. Otherwise we charge to 100% every morning. If we know the vehicle will sit for a day or two we will keep it unplugged at a reasonable SOC just in case of emergencies.
Sent from my ONEPLUS A6003 using Tapatalk
Sent from my ONEPLUS A6003 using Tapatalk
Zim
Member
But in all honesty, 100% daily should be fine for well over 2,000 cycles, or 240,000 miles. The smaller battery of the Volt has proven reliable at well over 2,000 cycle, with some pushing 4,000 cycles. Sure, the buffers may be slightly larger on the Volt, yet, I would argue the high acceleration and regen deceleration currents abused those smaller packs, with a curb weight 700 lbs over the SE.
Frequent DC fast charging will stress the SE, I don't think there's any question there. But the remaining care techniques are available for those looking at 15 - 20 years longevity.
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Frequent DC fast charging will stress the SE, I don't think there's any question there. But the remaining care techniques are available for those looking at 15 - 20 years longevity.
Sent from my ONEPLUS A6003 using Tapatalk
GvilleGuy
Well-Known Member
That's an interesting change that @SameGuy and @Matt007b point out in the '23 manual. Like @polyphonic said, if this is the official recommendation, their app should certainly provide the ability to stop charging at a certain percentage charge state.
SameGuy
Well-Known Member
Again, it sure seems like a CYA situation. There doesn’t appear to be any rhyme or reason for the three different manuals for three different — consecutive — model years.
Aquavir
Active Member
I’m charging it every time I get home because:
A) We have 4 kids, only one of which drives, so I need to know I’ve got as much range as possible to keep options open for shuttling to activities.
B) If I’m going to degrade the battery, I want to do it during the warranty period, and if it makes it to the end still with 70%, I’m cool with that. Also hoping that there will be some aftermarket battery options at that point, if I keep the car.
C) I don’t have the energy to baby the battery. Call me lazy, but I’m just going to charge and enjoy.
Sent from my iPhone using Inside EVs
A) We have 4 kids, only one of which drives, so I need to know I’ve got as much range as possible to keep options open for shuttling to activities.
B) If I’m going to degrade the battery, I want to do it during the warranty period, and if it makes it to the end still with 70%, I’m cool with that. Also hoping that there will be some aftermarket battery options at that point, if I keep the car.
C) I don’t have the energy to baby the battery. Call me lazy, but I’m just going to charge and enjoy.
Sent from my iPhone using Inside EVs
teslarati97
Well-Known Member
Maybe MINI and CATL quietly changed the battery chemistry to save money. Cobalt has become increasingly expensive over the past few years.
Charge to your desired SoC!
AndysComputer
Well-Known Member
in my experience Of doing multiple back to back fast chargers that statement is badly worded.
It is not the capacity that is reduced, it is the speed. Ie it charges at 33kw not 50kW. So it’s capacity to charge at 50kW is reduced. I have found no evidence of battery capacity being temporarily rescued, either based on temperature display or miles covered on a charge.
Rexsio
Well-Known Member
As I sold my. I3 7 1/2 old that battery was never close to thinking about replacement under warranty and following I 3 forum I believe only handful people have them replaced by BMW but mostly 1 or 2 cells of 8 not whole battery I 3 battery was 60 ampH and SE 94 ampH and I agree beat the crap out of it you still can’t degrade a battery to have replacement before 8 years .As I’m driving 4000 miles a year with SE / I 3 BMW prediction was a car will be drivable at least 16 years good range of drivability and if I keep SE for next 16 years I will be 88 years old and still can drive a car to corner deli for gallon of milk or 6 packs !
Rexsio
Well-Known Member
Rexsio
Well-Known Member
If anybody think you can have a HV battery replacement in 8 years is not going to happen bc BMW put all technology in it buffers 10 % up or down if they will be not so confident about a product and they have to replace those batteries they bankrupt company not happens in 8 years with BMW I 3 just drive a SE to a limit whatever range you get. My SE is doing 130-140 miles with 4000 miles every day.
Rexsio
Well-Known Member
10% up or down is a buffer on SE as on i3 your 100% charge is fake .
Rob Harlan
New Member
I do almost all of my charging at home with a standard Level I charger. My usage patterns allow this and physical access to my Level II charger is often challenging. Given that excess heat degrades batteries, I have suspected that Level I charging generates less heat than Level II charging and therefore is easier on the HV battery, but I have not come across any studies to confirm this hypothesis. I have also wondered if the HV battery might benefit from an occasional faster charge. I drive a Kona and charge it up to 100% each time immediately after use with no concern regarding overheating. I am typically just using the top 40% of the battery pack. Any insights regarding constant Level I charging would be appreciated.
Giosan
Member
I don't know how it affects your battery life but it definitely is less efficient than charging at 240. I have both at home and use the 120 charger most of the time because I'm taking advantage of solar pv. I don't get credit for any excess energy I'm producing so I make sure my se is set to charge from 11am-4 pm when I'm home. However, I have occasionally needed to charge quicker and compared kwh used at 120 volts and at 240 volts. It seemed to take about an extra 30% at 120! 64%-100% at 120 volts took 17 kwh and at 240 volts, only 12 kwh. If I was paying for electricity I'd be charging at 240.
Hatch
Active Member
This video from the Ioniq Guy talks about the losses with 120v compared to 240v charging his Ioniq5. He used Car Scanner and an OBDII adapter to measure power going into the battery during the different charging scenarios. I didn't catch how far he drives a month, but he says he figures he was wasting $18.54 a month when he was using 120v. He figured the loss was 31.5%, which pretty much agrees with the results @Giosan saw.