RapmasterD
Posts: 25
Joined: Mon Aug 07, 2017 12:17 pm
Delivery Date: 30 Jul 2017

Re: The "minimum battery workout per week" topic

Sat Jul 18, 2020 6:07 am

If I put a subwoofer in the Leaf and used THAT instead of climate control in ready mode, would THAT have similar impact as using climate control?

Yes, this is a serious question.

Thank you.

DaveinOlyWA
Posts: 15067
Joined: Sat Apr 24, 2010 7:43 pm
Delivery Date: 16 Nov 2019
Leaf Number: 319862
Location: Olympia, WA
Contact: Website

Re: The "minimum battery workout per week" topic

Sat Jul 18, 2020 8:28 am

RapmasterD wrote:
Fri Jul 17, 2020 3:02 pm
Hi - I drive a 2017 Nissan Leaf SV that hits the three year mark on August 1, and has 8,801 miles on it as of this writing.

Given that I'm NOW driving almost not at all, AND I BELIEVE I've read from folks like Dave in Olympia (?) that EV batteries need 'workouts' just like us humans do, I'm wondering:

Q: Is there a consensus on the MINIMUM miles I should be driving each week in order to maintain battery health?

Is there also a minimum number of miles I should target for each individual drive?

My typical errand-based journey runs anywhere from 2 to 5 miles, round trip.

Thank you.
Just a point of clarification; I didn't suggest you need to exercise your pack only that very high mileage drivers exceed the curve by a huge margin partially because they are beating Father Time which is also an unavoidable factor in the degradation game.

BUT...there are things you can do to help your case and that is SOC management. With your modest driving needs, this should be very easy for you. Simply don't charge past 50% SOC.

If you live in warmer areas, an even lower SOC would be better but as ALWAYS my #1 rule for battery management is the same for everyone.

Do not overcharge your car. If you drive every day but only charge twice a week, you are overcharging.

If you get home at night after a day that went as you expected it to go and you can repeat that day w/o charging then you overcharged.

You might think 80% SOC is ok but if you only need 20% of it, then you are overcharging.
2011 SL; 44,598 mi, 87% SOH. 2013 S; 44,840 mi, 91% SOH. 2016 S30; 29,413 mi, 99% SOH. 2018 S; 25,185 mi, SOH 92.23%. 2019 S Plus; 13,705 mi, 93.41% SOH
My Blog; http://daveinolywa.blogspot.com" onclick="window.open(this.href);return false;

RapmasterD
Posts: 25
Joined: Mon Aug 07, 2017 12:17 pm
Delivery Date: 30 Jul 2017

Re: The "minimum battery workout per week" topic

Sat Jul 18, 2020 9:36 am

Thanks for weighing in, Dave! And also, thx for the clarification.

I was actually planning on adopting a 60% to 40% routine. But do you think it’s notably better to go 50% to 30% or 50% to 40%?

Thank you.

DaveinOlyWA
Posts: 15067
Joined: Sat Apr 24, 2010 7:43 pm
Delivery Date: 16 Nov 2019
Leaf Number: 319862
Location: Olympia, WA
Contact: Website

Re: The "minimum battery workout per week" topic

Sat Jul 18, 2020 9:45 am

RapmasterD wrote:
Sat Jul 18, 2020 9:36 am
Thanks for weighing in, Dave! And also, thx for the clarification.

I was actually planning on adopting a 60% to 40% routine. But do you think it’s notably better to go 50% to 30% or 50% to 40%?

Thank you.
There was actually a rather surprising study published where there is strong indications that maintaining the car at the lower ends of the SOC spectrum is more beneficial. I guess I have to say that all my time living with the "blinking" bar was helping me in ways I didn't know

https://www.mdpi.com/2076-3417/8/10/182 ... -bAdm2TzAI

The article is rather technical so if you aren't willing to wade in, here is the key takeaway

"The result showed that, when only considering ageing from different types of driving in small Depth of Discharges (DODs), using a reduced charge level of 50% SOC increased the lifetime expectancy of the vehicle battery by 44–130%. When accounting for the calendar ageing as well, this proved to be a large part of the total ageing. By keeping the battery at 15% SOC during parking and limiting the time at high SOC, the contribution from the calendar ageing could be substantially reduced."

IOW; even if only charging to 50% SOC, you still want the charge to finish shortly before you drive.
2011 SL; 44,598 mi, 87% SOH. 2013 S; 44,840 mi, 91% SOH. 2016 S30; 29,413 mi, 99% SOH. 2018 S; 25,185 mi, SOH 92.23%. 2019 S Plus; 13,705 mi, 93.41% SOH
My Blog; http://daveinolywa.blogspot.com" onclick="window.open(this.href);return false;

gncndad
Posts: 284
Joined: Mon Feb 22, 2016 9:02 pm
Delivery Date: 23 Feb 2016
Location: Ft. Worth, TX

Re: The "minimum battery workout per week" topic

Sat Jul 18, 2020 10:18 am

I've known about the concept of keeping below the 50% SOC. Range anxiety has kept me from trying to do this. I'm now going to try it out.

I have a Level 2 charger, so IF I know I'll need to drive greater than 40 miles in a day, I'll simply do a (quicker) level 2 charge.

Will this infrequent (?) use of the higher charging speed be detrimental to the battery, and negate any benefit of longer periods less than 50% SOC?
2015 LeafS
2018 Toyota Prius Four Touring
2018 Toyota Prius Two
2014 Toyota Avalon Hybrid Limited

DaveinOlyWA
Posts: 15067
Joined: Sat Apr 24, 2010 7:43 pm
Delivery Date: 16 Nov 2019
Leaf Number: 319862
Location: Olympia, WA
Contact: Website

Re: The "minimum battery workout per week" topic

Sat Jul 18, 2020 10:25 am

gncndad wrote:
Sat Jul 18, 2020 10:18 am
I've known about the concept of keeping below the 50% SOC. Range anxiety has kept me from trying to do this. I'm now going to try it out.

I have a Level 2 charger, so IF I know I'll need to drive greater than 40 miles in a day, I'll simply do a (quicker) level 2 charge.

Will this infrequent (?) use of the higher charging speed be detrimental to the battery, and negate any benefit of longer periods less than 50% SOC?
Well, there is the time issue which means infrequent use of the car will increase your overall costs since it is a depreciating asset but imm, its low hanging fruit and not a major consideration.

It has me mulling over my charging habits. During the work week, I simply don't really have time for any major detours and I have been running my SOC between 30 to 65%. Looks like I need to reevaluate that option which would have been easy but I am being evicted so moving to a place yet undetermined but not likely to have charging of any type which means all public charging and I won't be doing that on a daily basis so...
2011 SL; 44,598 mi, 87% SOH. 2013 S; 44,840 mi, 91% SOH. 2016 S30; 29,413 mi, 99% SOH. 2018 S; 25,185 mi, SOH 92.23%. 2019 S Plus; 13,705 mi, 93.41% SOH
My Blog; http://daveinolywa.blogspot.com" onclick="window.open(this.href);return false;

RapmasterD
Posts: 25
Joined: Mon Aug 07, 2017 12:17 pm
Delivery Date: 30 Jul 2017

Re: The "minimum battery workout per week" topic

Sat Jul 18, 2020 10:47 am

Thank you for the article link, Dave. I’ve learned more in the last three weeks about the Leaf battery than I have in the past three years.

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