cwerdna
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Location: SF Bay Area, CA

Re: The 40KWH Battery Topic

Wed May 08, 2019 2:07 pm

^^^
Use Leaf Spy instead of guessing with the bars.

'19 Bolt Premier
'13 Leaf SV w/premium package (owned)
'13 Leaf SV w/QC + LED & premium packages (lease over, car returned)

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LeftieBiker
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Re: The 40KWH Battery Topic

Wed May 08, 2019 3:53 pm

danrjones wrote:This will be interesting in July.

Last night at 10pm it was 80f and the battery temp was smack in the middle,
lvl 1 charged all night, 60f this morning at 6am, and the battery temp was down a couple chunks (not sure if its bars, all I see is a constant bar left to right)

But in July when its 105 at 10pm and 78 at 6am, I'm wondering if lvl 1 charging all night (8 hrs) or lvl 2 charging for say 2 hours (4am to 6am) will end up thermally better / worse.

I guess I can try both and see.
While you should avoid charging at all if the battery temp is 7 bars/60% or higher, I agree that L-1 usually produces less battery heat. My GUESS is that it adds heat at about the same rate the pack radiates it away.
Scarlet Ember 2018 Leaf SL W/ Pro Pilot
2009 Vectrix VX-1 W/18 Leaf modules, & 3 EZIP E-bicycles.
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SageBrush
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Location: NM

Re: The 40KWH Battery Topic

Wed May 08, 2019 4:02 pm

lorenfb wrote:
lorenfb wrote:
SageBrush wrote: hmmm...
L2 may be twice the current but it is also twice the voltage so
T2 = 0.25 of T1
You can adjust the numbers based the actual L1 versus L2 currents and times.
Remember, during any charge mode (L1/L2/L3) the battery voltage is basically the same, approx. 370 - 400. During L1/L2 the EVSE output voltage is changed (scaled) by the inverter to the 370 - 400. For L3, The DC source is in the same D.C. range.
I had to write this out. I compared

L1 at 120v, 16 Amps
L2 at 240v, 32 Amps
L3 at 480v, 100 Amps

The arithmetic worked out as
L1: H heat energy per energy E
L2: 4H heat energy per energy E
L3: 25H heat energy per energy E

Any mistakes ? If not then I'll say that compared to DCFC, L2 is a gentle charging routine
Last edited by SageBrush on Wed May 08, 2019 5:39 pm, edited 1 time in total.
2013 LEAF 'S' Model with QC & rear-view camera
Bought off-lease Jan 2017 from N. California
Two years in Colorado, now in NM
03/2018: 58 Ahr, 28k miles
11/2018: 56.16 Ahr, 30k miles
-----
2018 Tesla Model 3 LR, Delivered 6/2018

LeftieBiker
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Re: The 40KWH Battery Topic

Wed May 08, 2019 4:12 pm

The actual charging rate to the car, after parasitic losses, for L-1 is more like 11 amps. There are 16A L-1 EVSEs but they are not the norm and require a 20A circuit rather than the usual 15A household circuit. 12A units are typical.
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.

danrjones
Posts: 600
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Location: Ridgecrest, CA

Re: The 40KWH Battery Topic

Wed May 08, 2019 5:29 pm

cwerdna wrote:^^^
Use Leaf Spy instead of guessing with the bars.
Thanks
2018 Leaf SV Pearl White with Tech and All Weather, Purchased New on 5/3/19

sptleaf
Posts: 20
Joined: Sun Feb 17, 2019 10:57 pm
Delivery Date: 18 Feb 2019
Location: San Diego

Re: The 40KWH Battery Topic

Wed May 08, 2019 7:04 pm

2 month update 2019 Leaf S - no QC port, San Diego

Date-------- SOH--- Ahr---- Hx----- Odo--- # L1/L2-- Days -- Loss- Yearly SOH Loss Run Rate
3/8/2019 99.39% 114.74 104.14% 649 24
3/15/2019 99.31% 114.64 106.01 882 32 7 0.08%
4/7/2019 99.06% 114.35 110.42 1606 56 30 0.33% 4.0%
5/8/2019 97.84% 112.95 113.36 2698 91 61 1.55% 9.3%

I usually charge 80-90% and never go below 20%.

jdcbomb
Posts: 233
Joined: Tue May 19, 2015 12:17 pm
Delivery Date: 18 May 2015

Re: The 40KWH Battery Topic

Wed May 08, 2019 7:29 pm

2018 SV - 40 kWh - 2018/09 Manufacture Date - In Service 2019 January.

AHr 111.47 - SOH 96.56 - Hx 115.05 - ODO 6,176 mi - QC 57 - L2 155

Thoughts on how this compares to other 2018 units?
2018 SL - In Service 2019 JUN - 2020 APR 94.3 SOH
2018 SV - In Service 2019 JAN - 2020 APR 92.0 SOH
2013 SL - In Service 2013 FEB, Sold 2018 JUN (50,050 mi) - 4 Bars Lost (44,255 mi)
Location: Raleigh, NC

nightleaf
Posts: 14
Joined: Mon Apr 23, 2018 8:08 am
Delivery Date: 29 Mar 2018
Location: BC, Canada

Re: The 40KWH Battery Topic

Wed May 08, 2019 8:10 pm

Northwest car 2018 SV, in service Mar 29/18
AHr 106.86 - SOH 92.57 - Hx 118.60 - ODO 25,512 km- QC 7 - L2 443
2018 Leaf SV - 3/18 build date, 3/30/18 In service date

lorenfb
Posts: 2391
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Delivery Date: 22 Nov 2013
Leaf Number: 416635
Location: SoCal

Re: The 40KWH Battery Topic

Wed May 08, 2019 9:12 pm

danrjones wrote: I also noticed today my Hx jumped up by a full 0.1. SOH stayed the same so far today.
Reading through the threads here I have discovered Hx was the old battery health meter before SOH was created / discovered.
There didn't seem to be a consensus for what it mean now, especially for the 2018's.
The most logical explanation for Hx is that it's the ratio of the present battery conductance (inverse of resistance) to the
the original battery conductance when new. Like SOH, it declines with battery age and degradation.
#1 Leaf SL MY 9/13: 76K miles, 47 Ahrs, 5.0 miles/kWh (average), Hx=70, SOH=78, L2 - 100% > 1000, temp < 95F, (DOD) > 20 Ahrs
#2 Leaf SL MY 12/18: 10.3K miles, SOH 109Ahrs/115Ahrs, 5.2 miles/kWh (average), DOD > 20%, temp < 105F

danrjones
Posts: 600
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Location: Ridgecrest, CA

Re: The 40KWH Battery Topic

Wed May 08, 2019 9:32 pm

Interesting

It seems reading through here that many notice their hx increase at first when new. It will be interesting to see how long it does.
Last edited by danrjones on Wed May 08, 2019 10:00 pm, edited 1 time in total.
2018 Leaf SV Pearl White with Tech and All Weather, Purchased New on 5/3/19

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