Going out of town - best way to tender?

[igs]

So as that video says, Depth of Discharge can cause issues for battery life, you are better charging several smaller charges, like going from say 65% to 80% in use than going from 50 to 80 or 25 to 80 etc. The video also says that as long as temperatures are not hot that you can store a battery with a higher state of charge but if it is hot then store it low (video suggests 30%) yet chart above shows no difference between 30 and 50%.

I'm not suggesting someone store their battery at 100%, what I am suggesting is that if it isn't hot then storing at 80% vs 50% will likely have very little if any difference in the degradation of their battery but will have an impact to driving range and convenience.

I honestly don't care at what % other people store their batteries, I've had a Tesla for almost 10 years and routinely charged to and stored at 90% with very little degradation across multiple models. I am charging at 80% on the Cybertruck because I'm being more cautious given the early nature of the truck and its batteries, and the Cybertruck seems to be much more accurate in predicting range and burn rates than any of my prior Teslas.

I'd still like to know the data source behind the chart you showed and what the numbers actually represent.

Different charts show different things. In other words you are taking this chart to represent a hell of a lot more than what it really does. Here's the one you're looking for.

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[Crissa]

Why would drain between 50 and 45 percent be any different than drain between 80 and 75 percent? I'm not convinced that it would be. As long as you aren't at 100% I think you should be fine, as others said, just leave it plugged in.

Different charts show different things. In other words you are taking this chart to represent a hell of a lot more than what it really does. Here's the one you're looking for.

This one isn't quite so helpful as the 100-25 line represents 7x more miles than the 75-65 line; and 2x as many miles as the 75-45% line.

Still, the point is made: As you go over 50%, more of the lithium ions need to cram together tighter, and it takes more time for the electrons to do that - which is more heat, and more chemical bond which might create plating, which is where an ion become bonded lithium metal and no longer accepts a charge.

This is also an over time thing as opposed to a cycles thing - the more energy in the pack, the more likely it is for the ions to degrade.

So storing the pack with less energy means less chance for this degradation to occur, plus less hazard in the case of disaster.

-Crissa

(There's of course, chemistry reasons to also avoid storing it at 0%! A battery is a chemical version of a spring, and hence, prefers to be stored in a neutral state.)

 

[TeslaKen]

This one isn't quite so helpful as the 100-25 line represents 7x more miles than the 75-65 line; and 2x as many miles as the 75-45% line.

Still, the point is made: As you go over 50%, more of the lithium ions need to cram together tighter, and it takes more time for the electrons to do that - which is more heat, and more chemical bond which might create plating, which is where an ion become bonded lithium metal and no longer accepts a charge.

This is also an over time thing as opposed to a cycles thing - the more energy in the pack, the more likely it is for the ions to degrade.

So storing the pack with less energy means less chance for this degradation to occur, plus less hazard in the case of disaster.

-Crissa

(There's of course, chemistry reasons to also avoid storing it at 0%! A battery is a chemical version of a spring, and hence, prefers to be stored in a neutral state.)

Yes and I think that chart makes my point that the best item on that chart is 76-65% because you have the smallest depth of discharge. If you normally run your battery at 80% but decide to store it at 50% then aren't you in a 80-50 discharge cycle (probably most similar to the 75-45 line shown in the chart) but if you store at 70 and the charge up to 80 you have a smaller depth of discharge, or as I was suggesting, if it isn't hot, just store at 80% and have no depth of discharge to deal with.

Obviously if you store it once a year for 6 months and then charge 1 time you don't have a bunch of charging cycles. I don't disagree that for every battery there is probably some ultimate % best storage point of the battery, but that if it isn't a spike or a valley trough, but rather a chart that shows numbers on either side of that optimum are still pretty close to that optimum then you are probably just fine to store at one of those numbers as opposed to trying to be exactly at the optimum number, whatever that number might happen to be.

For example if I store at 70 or 75% and normally charge to 80% then getting back to my normal charging point is a very minor depth of discharge difference and takes very little time and it thus much more convenient. True I might not get 22 years and 11 months out of my battery pack I might only get 22 years and 3 months

 

[igs]

Yes and I think that chart makes my point that the best item on that chart is 76-65% because you have the smallest depth of discharge.

45% - 55% is even better

 

[TeslaKen]

I've decided to only store positrons in my battery from now on as they don't cause the kind of degradation that electrons cause... Amazon has a deal on electron filters right now so you can filter out those pesky no-good electrons and focus on retaining only the positrons that you need.

 

[jf64k]

OP: Leave it plugged in and don’t let the battery get low. Easy-peasy, haha!!

From the Owner’s Manual:

 

[Woodrick]

If the entire truck is being stored or shipped, the same rules apply.

The electronics are programmed to use less power at that level. And if there's an incident, there's less power to be released.


Chemistry.

-Crissa

Incorrect.

Still, it may be less power, but it's not no power.

But very specifically, shipping of batteries in their transport cases have VERY specific regulations about how they must be shipped.

And if you follow this set of recommendations back to the source, you can see that it is explicitly for shipping.

It's very similar to the fact that you can't put spare lithium batteries in your checked luggage while on a plane.

 

[Woodrick]

45% - 55% is even better

Any idea how many miles or years 3000 FCEs are?

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