Baltneu
Posts: 230
Joined: Sun Oct 07, 2018 8:54 pm
Delivery Date: 06 Oct 2018
Leaf Number: 313633

Re: Battery health during Coronavirus time

Thu Apr 16, 2020 7:59 am

The consensus is that if you keep enough charge in the main battery, when the 12v battery needs a charge, the main battery will do its job. Enjoy your car.
2018 Gun Metallic Gray, SL, Technology Package, etc.

HerdingElectrons
Posts: 188
Joined: Sat Sep 08, 2018 3:20 pm
Delivery Date: 17 Sep 2018
Location: Central Coast, Ca

Re: Battery health during Coronavirus time

Thu Apr 16, 2020 8:11 am

I would personally keep my leaf SOC at 40% & absolutely use a high quality 12v maintenance charger if I was in your situation.

The leaf has very little if any meaningful parasitic drain on the main battery & 40% is a well known storage %. Think about the charge % when you buy a new cell phone & 1st turn it on.

I personally use a 1.5A "Smart Battery Charger" to periodically top off all of my 12V auto batteries.

A former co-worker whom was a Svc writer at a dealership for 2 decades had told me that a battery company rep advised him to do that monthly & his batteries would last 2-3x longer due to the sulfating that occurs over time on the lead acid plates when not at a full charge which ironically is opposite of best practice for all type of lithium ion.

My anecdotal evidence is that my build date of January 2013 Prius with 140K miles still has its original OEM 12V battery which is a known common & early failure part for that car & is still working just fine for me.
2018 SL Pearl White 4.5/3.9 Warm/Cold weather

09/18, 01K mi: AHr= 114.52 / SOH= 99.20 / HX= 099.70%
04/19, 10K mi: Ahr= 111.45 / SOH= 96.54 / HX= 113.82%
11/19, 20K mi: Ahr= 107.44 / SOH= 93.07 / HX= 109.96%

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Stanton
Forum Supporter
Posts: 2241
Joined: Thu Feb 03, 2011 10:56 am
Delivery Date: 01 Sep 2011
Leaf Number: 7458
Location: Plano, TX
Contact: Website Twitter

Re: Battery health during Coronavirus time

Thu Apr 16, 2020 8:23 am

Bottom line: EVs survive "storage" situations better than any ICE ever did/would.
Follow the charge guidelines mentioned in this thread...don't leave it sitting around "full"...and don't worry about how much you do/don't drive it any given week. Current (intermittent) driving habits are what EVs were built for!
2011 Blue Ocean SV w/floor mats & window tint
Lithium Pros 12v LiFePO4 battery w/Antigravity Battery Tracker
FIAMM 74100 horns
Wet Okole seat covers
Tor's low-power heater mod
2013 sun visor
Battery Pack replaced (Rev E) @51 months and 41k miles

LeftieBiker
Moderator
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Joined: Wed May 22, 2013 3:17 am
Delivery Date: 30 Apr 2018
Location: Upstate New York, US

Re: Battery health during Coronavirus time

Thu Apr 16, 2020 12:42 pm

Baltneu wrote:
Thu Apr 16, 2020 7:59 am
The consensus is that if you keep enough charge in the main battery, when the 12v battery needs a charge, the main battery will do its job. Enjoy your car.
If there is any "consensus" at all, it is that the Leaf should charge the 12 volt battery periodically, but that it may not, in some circumstances, do a great job of it. My 2018 has been measured by me at about 12.3 volts, which is too damned low.
Scarlet Ember 2018 Leaf SL W/ Pro Pilot
2009 Vectrix VX-1 W/18 Leaf modules, & 3 EZIP E-bicycles.
BAFX OBDII Dongle
PLEASE don't PM me with Leaf questions. Just post in the topic that seems most appropriate.

Baltneu
Posts: 230
Joined: Sun Oct 07, 2018 8:54 pm
Delivery Date: 06 Oct 2018
Leaf Number: 313633

Re: Battery health during Coronavirus time

Thu Apr 16, 2020 12:51 pm

Why is 12.3 volts too low? It is a 12v battery.
2018 Gun Metallic Gray, SL, Technology Package, etc.

LeftieBiker
Moderator
Posts: 15526
Joined: Wed May 22, 2013 3:17 am
Delivery Date: 30 Apr 2018
Location: Upstate New York, US

Re: Battery health during Coronavirus time

Thu Apr 16, 2020 12:59 pm

Baltneu wrote:
Thu Apr 16, 2020 12:51 pm
Why is 12.3 volts too low? It is a 12v battery.
Somewhere in the distant past, a big mistake was made: so-called "nominal" voltage was used to categorize the group of batteries now known as "12 volt." In fact, 12.0 volts is very nearly dead, and 12.3 volts is something like 45% charged. a "full" 12 volt battery will read just under 13.0 volts, and a "12 volt" AGM battery will read about 13.35 volts when fully charged.
Scarlet Ember 2018 Leaf SL W/ Pro Pilot
2009 Vectrix VX-1 W/18 Leaf modules, & 3 EZIP E-bicycles.
BAFX OBDII Dongle
PLEASE don't PM me with Leaf questions. Just post in the topic that seems most appropriate.

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Dala
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Posts: 246
Joined: Sun Oct 28, 2018 11:24 am
Delivery Date: 01 Jan 2015
Leaf Number: 316851
Location: Finland
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Re: Battery health during Coronavirus time

Thu Apr 16, 2020 1:55 pm

I followed a Leaf FB discussion, one local left his 40kWh 100% charged for 6 weeks, when he booted it up and drove it SOH dropped by over 2%. It might bounce back, but still it felt bad for him.

It seems to be more important for 40/62kWh Leafs to make sure SOC is in the middle since these batteries charge to 4.20V/cell.

The older 24/30kWh packs only go to 4.13V, so "100%" SOC on these are not as bad.

HerdingElectrons
Posts: 188
Joined: Sat Sep 08, 2018 3:20 pm
Delivery Date: 17 Sep 2018
Location: Central Coast, Ca

Re: Battery health during Coronavirus time

Fri Apr 17, 2020 10:40 am

Dala wrote:
Thu Apr 16, 2020 1:55 pm
I followed a Leaf FB discussion, one local left his 40kWh 100% charged for 6 weeks, when he booted it up and drove it SOH dropped by over 2%. It might bounce back, but still it felt bad for him.

It seems to be more important for 40/62kWh Leafs to make sure SOC is in the middle since these batteries charge to 4.20V/cell.

The older 24/30kWh packs only go to 4.13V, so "100%" SOC on these are not as bad.
Wow that's unfortunate for that owner. No Lithium Ion battery should EVER be stored or left unused at 100% SOC. Ideally keep them around 40%. I only charge my handheld power tool packs to 50% until I need to use them for the same reason & get years & years of service out them.

I have multiple clients with Teslas & I have convinced them to set their daily charge to 65% to enable them much longer pack lifespans because 65% of a 75kwH pack is still over 200 miles & for local driving is TONS of range
2018 SL Pearl White 4.5/3.9 Warm/Cold weather

09/18, 01K mi: AHr= 114.52 / SOH= 99.20 / HX= 099.70%
04/19, 10K mi: Ahr= 111.45 / SOH= 96.54 / HX= 113.82%
11/19, 20K mi: Ahr= 107.44 / SOH= 93.07 / HX= 109.96%

Learjet
Posts: 99
Joined: Tue Mar 24, 2020 8:04 pm
Delivery Date: 11 Mar 2020
Leaf Number: 309454
Location: Louisiana, USA

Re: Battery health during Coronavirus time

Fri Apr 17, 2020 11:21 am

Image
2019 Nissan Leaf SL Plus

LeftieBiker
Moderator
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Joined: Wed May 22, 2013 3:17 am
Delivery Date: 30 Apr 2018
Location: Upstate New York, US

Re: Battery health during Coronavirus time

Fri Apr 17, 2020 12:23 pm

Thanks. I was off on my memory of SOC equivalents, but 12.3V/70% is still well below good storage voltage for a "12 volt" battery.
Scarlet Ember 2018 Leaf SL W/ Pro Pilot
2009 Vectrix VX-1 W/18 Leaf modules, & 3 EZIP E-bicycles.
BAFX OBDII Dongle
PLEASE don't PM me with Leaf questions. Just post in the topic that seems most appropriate.

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