[nZtiZia]

DaveDBD
“Did you know that some carmakers are building a buffer into their EV vehicles to help sustain a healthy SoC for as long as possible? What that means is that, when the battery pack is reflecting a 100% charge on the battery monitor, it’s not actually reaching the limits that could affect the battery’s health. This reserve or buffer mitigates the degradation that can be experienced, and most carmakers will likely turn to this type of design to keep their vehicles in the best shape possible.”

“The more pressing issue tends to be depth of discharge. Whether you’re charging to 60%, 80%, or even 95%, it’s best to keep the DoD as low as possible, and it’s certainly preferred to be less than 50% DoD.”

[e61it]

So to limit DoD even when a small amount of battery used on a low miles trip one should always plug in to return battery to full?

[nZtiZia]

Originally Posted by e61it

So to limit DoD even when a small amount of battery used on a low miles trip one should always plug in to return battery to full?

ABC = Always Be Charging

[jad03060]

Originally Posted by e61it

So to limit DoD even when a small amount of battery used on a low miles trip one should always plug in to return battery to full?

That's what BMW says, and they're the one holding the liability for battery warranty. Another thing that degrades a battery pack is uneven charging...that requires battery balancing, which is much easier to achieve from a full pack. It's tougher to assess the battery status when it's not full with the way the voltage curve behaves.

Keep in mind that those living in a CARB state have an even longer battery warranty than the rest of the USA, but BMW can't tell for sure where any one vehicle may end up during its warranty life, so this applies to all sold in the USA.

[DaveDBD]

Still no.

A lithium battety for longest cycle life is never charged to 100%.

https://batteryuniversity.com/articl...ased-batteries

I have no doubt that the BMW hybrid batteries at 68% usable capacity stay below 90% full charge.

You believe what you want lol.

[nZtiZia]

Originally Posted by DaveDBD

Still no.

A lithium battety for longest cycle life is never charged to 100%.

https://batteryuniversity.com/articl...ased-batteries

I have no doubt that the BMW hybid batteries at 68% usable capacity stay below 90% full charge.

You believe what you want lol.

it seems you’re conflating full capacity 100% charge versus and usable capacity 100% charge. they’re not the same nor are the effects on battery life the same when fully charged.

I do understand the point you’re trying to make, though. it just doesn’t apply to the 50e.

[rexus300]

So I have been charging my 50e nightly and max I get on a full charge from 0% is 47 miles and 22.77 kwh. This is more than what BMW advertised at 40 miles. Am I missing something?

[javapro]

Originally Posted by rexus300

So I have been charging my 50e nightly and max I get on a full charge from 0% is 47 miles and 22.77 kwh. This is more than what BMW advertised at 40 miles. Am I missing something?

22-23 kWh is about what it should take to charge to 20 kWh from 0 assuming no preconditioning (the extra 15% is due to heat loss while charging). BMW's estimated range of 40 miles is based on certain driving conditions so one may get less or more depending on their driving pattern, HVAC use, ambient temperature, etc. Wait until winter and you will see your electric range go down.

[nZtiZia]

Originally Posted by rexus300

So I have been charging my 50e nightly and max I get on a full charge from 0% is 47 miles and 22.77 kwh. This is more than what BMW advertised at 40 miles. Am I missing something?

as mentioned, what you are seeing are charging losses. it’s normal to use more kWh to charge. (you’re not getting more capacity if that’s what you’re wondering.)

as for the higher miles, that will also vary depending on your driving habits, ambient temperatures, HVAC use, and other factors. truth be told, the concept has been the same with regards to fuel range. if you’re conservative with the throttle, you get more range. the same applies to electric range with the addition of other factors coming into play

[915M]

They might allow 15% top and 15% bottom reserve so it does not charged more than 85%(of total) and charge does not go below 15%.(MY guess)

In that case, always charging is good because battery will have longest life when it is used between 30% to 85%(Showing as 100% in the car) range.

If my guess is right, with the Battery Hold tries to stay on at 25%(showing at 10% or 4 miles iDrive) range which is not ideal for the battery.
Hope they set Battery Hold minimum is at 40% which will be 25%/10 miles(for iDrive) for battery longevity.

[jad03060]

Battery hold in the LCI will only increase the SOC if it is near zero indicated. Otherwise, it just maintains the current level when activated. NOte, though, if you were coasting down a long grade, regeneration could still raise the SOC.

Prior to the battery hold on the LCI, you could set the percentage you wanted it to maintain from 30-100% in 10% increments. If it wasn't charged to your preset, it would charge it up using the EV motor as an alternator.