DaveinOlyWA
Posts: 14204
Joined: Sat Apr 24, 2010 7:43 pm
Delivery Date: 16 Nov 2019
Leaf Number: 319862
Location: Olympia, WA
Contact: Website

Re: Battery degradation info, 80% vs. 100% daily charge

Wed Mar 09, 2011 2:11 pm

There will b some that will achieve those numbers. I am feel that a significant reduction in meeting my needs will happen when it gets to less than 50 miles of range. But art he same time it would still easily meet a large portion of my needs assuming my transportation needs do not change
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; 412 mi, 99.72% SOH
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barsad22
Posts: 142
Joined: Fri Jan 14, 2011 5:16 pm
Delivery Date: 17 Feb 2011
Location: Berkeley, CA

Re: Battery degradation info, 80% vs. 100% daily charge

Sun Mar 13, 2011 7:17 pm

I like all the optimism about EV charging infrastructure and the battery degradation estimates. It's hard to see the future when look at the charging station maps now... the key to building the infrastructure will be to get as many of these on the road as we can to encourage employers and retailers to get on board.
As for the battery capacity, I hope Nissan has some hard numbers for us before the end of this year on recommended Depth-of-Discharge (I've heard 20%, but they're just guesses) and long-term battery degradation at 100% charge daily over 5 years.

Josh
2011 red Nissan Leaf SL L3
Delivered 2/17/11
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electricfuture
Posts: 249
Joined: Fri Oct 15, 2010 7:15 pm
Delivery Date: 14 Jun 2011
Leaf Number: 4205
Location: Davenport , FL

Re: Battery degradation info, 80% vs. 100% daily charge

Mon Jun 27, 2011 10:04 am

Nissan Chat said that charging to 100% will have little impact on the batery life. 4000 L2 chragers are going in in San Diego this year - most this summer according to Ecotality

TangoKilo
Posts: 278
Joined: Tue Feb 22, 2011 1:39 pm
Delivery Date: 09 May 2011
Leaf Number: 2212
Location: Moorpark

Re: Battery degradation info, 80% vs. 100% daily charge

Mon Jun 27, 2011 10:24 am

I've only charged to 100% by default. I'll reach 100,000 miles on my LEAF well before the 8 year warranty expires. Then I'll donate my ride for scientific experiments... :twisted:

GaslessInSeattle
Posts: 1566
Joined: Fri May 06, 2011 2:15 pm
Delivery Date: 29 Apr 2011
Leaf Number: 850

Re: Battery degradation info, 80% vs. 100% daily charge

Mon Jun 27, 2011 11:53 am

I will go out on a limb here and give my newbie working conclusion, which is ***subject to change*** as new information comes available. I think the recommendation for 80% is for the bulk of drivers out there who are driving far less than 70 miles a day. If you commute requires 100% charging, then do it, don't sweat it. The thing to avoid, IMHO, is charging to 100% each time you plug in, if you are plugging in multiple times a day for short opportunity charging to avoid dramatically increasing the number of 100% charges.

If I charged to 100% every time I plugged in, that wouldn't just be once a day, it would be up to 5 times a day and that is the important thing to avoid, IMHO. Charging multiple times a day makes 80% charging more than adequate for the vast majority of my driving and keeps the car charged up enough all the time for me to be comfortably spontaneous.

g
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SparkyEV
Posts: 97
Joined: Tue May 17, 2011 4:15 pm
Delivery Date: 09 Jun 2011
Leaf Number: 3651
Location: San Jose, CA

Re: Battery degradation info, 80% vs. 100% daily charge

Mon Jun 27, 2011 4:33 pm

I think the main issue with charging to 100% is that lithium-ion batteries don't like to sit at 100% charge for extended periods of time. If you charge to 100% overnight and then drive your car first thing in the morning, it's probably much less of an impact than if you charge to 100% and then let the car sit for a while on a regular basis. The other impact of charging to 100% is the extra heat on the battery, but that effect is probably very small.

So, if you need 100%, go for it without worry, just don't let it sit at 100% for an extended period.
2016 SV (30kWh)
@500 miles: AHr=79.88 SOH=100 Hx=95.3, GIDs=363
Was: 2011 Blue Ocean Leaf SL. Retired with 62k miles and 3 bars down.
My daily commute: 55 miles round trip, 92% freeway @ 55-60MPH, 5.0 miles/kWh average (per the dash)

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EVDRIVER
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Re: Battery degradation info, 80% vs. 100% daily charge

Mon Jun 27, 2011 5:32 pm

electricfuture wrote:Nissan Chat said that charging to 100% will have little impact on the batery life. 4000 L2 chragers are going in in San Diego this year - most this summer according to Ecotality
Here is a funny line. "Nissan Chat said......... :lol: If I had 1% SOC life for each thing Nissan chat said that was 100% wrong I my pack would never degrade for the next 100 years.

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gasmiser1
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Re: Battery degradation info, 80% vs. 100% daily charge

Mon Jun 27, 2011 5:50 pm

How about this: 100% charge at L2 verses 100% charge at L1------Is L1 preferable when charging to save battery life :?:

If someone has to charge at 100% daily, and time permitting could use L1 overnight, wouldn't L1 extend battery life by using only 1/3 the amps and therefore have reduced heat while charging the batteries) :?:

I know-----------L1 requires a much longer charging time, 2+ times longer. But, given the opportunity.............I use L1 if I need 100% charge whenever possible.
2nd leased 2014 Nissan LEAF, 2500 miles, leased 5/4/14
(1st Leaf, 3/29/11, leased until 5/4/14, 45,000 miles)
2014 Chevy Volt, 11,200 miles, leased 11/2013
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davewill
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Joined: Thu Mar 17, 2011 6:04 pm
Location: San Diego, CA, US

Re: Battery degradation info, 80% vs. 100% daily charge

Mon Jun 27, 2011 6:25 pm

gasmiser1 wrote:How about this: 100% charge at L2 verses 100% charge at L1------Is L1 preferable when charging to save battery life?
Nope. Both L2 and L1 are a slow charge as far as these batteries are concerned.
2014 Rav4 EV, Blizzard Pearl White
2011 LEAF SL w/QC, Blue Ocean, returned at end of lease

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gasmiser1
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Re: Battery degradation info, 80% vs. 100% daily charge

Mon Jun 27, 2011 8:31 pm

davewill wrote:
gasmiser1 wrote:How about this: 100% charge at L2 verses 100% charge at L1------Is L1 preferable when charging to save battery life?
Nope. Both L2 and L1 are a slow charge as far as these batteries are concerned.
------------------------

Thanks. Good to know, since I'm a newbie EV owner(1st EV). I've owned 6 hybrids from Honda and Toyota. So, my battery knowledge is very limited.
2nd leased 2014 Nissan LEAF, 2500 miles, leased 5/4/14
(1st Leaf, 3/29/11, leased until 5/4/14, 45,000 miles)
2014 Chevy Volt, 11,200 miles, leased 11/2013
Future Tesla Model S owner :-)
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