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mwalsh
Posts: 9658
Joined: Thu Apr 22, 2010 10:10 am
Delivery Date: 05 Jan 2011
Leaf Number: 0213
Location: Garden Grove, CA

Normal range from SOC bar 1 today?

Mon Feb 21, 2011 11:23 am

I haven't seen what I'd consider the "proper" range from bar one on the SOC meter since the first week with my car. Instead, seemingly irrespective of how I drive, I've begun to expect no more than 3.5 miles from it. In fact, I now consider that "normal". So imagine my surprise today when I got 6 miles out of bar one! :o

What was different about today?

Well, there were several differences from my normal charging routine:

1) The car was already at ~80% charged when I went to fill manually yesterday afternoon. It took only a couple of hours to get to 100%.

2) I decided to leave the car plugged in last night, because I wanted to try cabin pre-conditioning this morning (knew it was going to be on the cold side). So (and this was an oversight on my part), the charge timer kicked in at some point and attempted to charge the already full battery. Now I don't know when this started but, because I have charging set based on end time, I got two charging completed messages - one at 10:09pm and one at 12:07am (this is normal abnormal behavior when you charge based on end time).

3) It was quite cold last night, and we've already talked about how cold weather enables a battery to store more. But I wouldn't say it was a whole lot colder than many of the previous nights I've charged.

4) Because I pre-conditioned the car this morning (the first time I've actually used the heater while plugged in), the EVSE was connected and pulsing charge into the battery pack, as it does. Those of you who have done this before will know is normal operation.

So would anyone care to speculate on why this apparent restoration of full range within this one bar has occurred?
2011 Blue Ocean SL with 85,000 miles
2015 pack on 12/30/15
Tinted windows
Bosch AGM 12v
Ecopia 422+ tires
L1 EVSE upgrade
FIAMM horns
Superbright LED lighting
2013 sun visors
LED shifter
Heated seats
GT-R map lamp lenses
Altima illuminated door switches

jcesare
Posts: 583
Joined: Tue Oct 19, 2010 3:22 pm
Delivery Date: 20 Apr 2011
Leaf Number: 1290
Location: San Marcos, CA

Re: Normal range from SOC bar 1 today?

Mon Feb 21, 2011 12:04 pm

It might have to do with cell balancing, which someone has stated only happens when fully charged.
http://www.mynissanleaf.com/viewtopic.php?f=27&t=2746

The balancing conversation was split out into a new thread.
http://www.mynissanleaf.com/viewtopic.p ... 95&start=0
Leaf eTec Blue Ocean
Reserved 6/25/10
EVProject approved 1/06/11
Blink EVSE Installed 4/6/11 (Separate meter, ethernet connection)
Ordered 1/25/11 Delivered 4/20/2011

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LakeLeaf
Posts: 1424
Joined: Mon Jun 07, 2010 4:15 pm
Delivery Date: 04 Aug 2018
Location: South Lake Tahoe, California

Re: Normal range from SOC bar 1 today?

Mon Feb 21, 2011 12:24 pm

Have we determined yet how the display reacts when the car loses capacity? Does the loss come out of the top bar until you have no top bar, then the second to top bar, etc. or does the entire battery capacity get spread equally over all of the bars so that each bar represents a narrower range of charge?

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mwalsh
Posts: 9658
Joined: Thu Apr 22, 2010 10:10 am
Delivery Date: 05 Jan 2011
Leaf Number: 0213
Location: Garden Grove, CA

Re: Normal range from SOC bar 1 today?

Mon Feb 21, 2011 12:34 pm

LakeLeaf wrote:Have we determined yet how the display reacts when the car loses capacity? Does the loss come out of the top bar until you have no top bar, then the second to top bar, etc. or does the entire battery capacity get spread equally over all of the bars so that each bar represents a narrower range of charge?
My experience thus far would seem to indicate that you'd eventually loose bars.
2011 Blue Ocean SL with 85,000 miles
2015 pack on 12/30/15
Tinted windows
Bosch AGM 12v
Ecopia 422+ tires
L1 EVSE upgrade
FIAMM horns
Superbright LED lighting
2013 sun visors
LED shifter
Heated seats
GT-R map lamp lenses
Altima illuminated door switches

User avatar
LakeLeaf
Posts: 1424
Joined: Mon Jun 07, 2010 4:15 pm
Delivery Date: 04 Aug 2018
Location: South Lake Tahoe, California

Re: Normal range from SOC bar 1 today?

Mon Feb 21, 2011 1:20 pm

mwalsh wrote:
My experience thus far would seem to indicate that you'd eventually loose bars.
Thanks - I take it then that you might be thinking your quick first bar is a reflection of a little loss of capacity?

User avatar
mwalsh
Posts: 9658
Joined: Thu Apr 22, 2010 10:10 am
Delivery Date: 05 Jan 2011
Leaf Number: 0213
Location: Garden Grove, CA

Re: Normal range from SOC bar 1 today?

Mon Feb 21, 2011 1:34 pm

LakeLeaf wrote:Thanks - I take it then that you might be thinking your quick first bar is a reflection of a little loss of capacity?
Well, I did. But now that I seem to have inadvertently come up with a way to restore full capacity....... ;)
2011 Blue Ocean SL with 85,000 miles
2015 pack on 12/30/15
Tinted windows
Bosch AGM 12v
Ecopia 422+ tires
L1 EVSE upgrade
FIAMM horns
Superbright LED lighting
2013 sun visors
LED shifter
Heated seats
GT-R map lamp lenses
Altima illuminated door switches

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evnow
Moderator
Posts: 11480
Joined: Thu Apr 22, 2010 11:41 am
Delivery Date: 25 Feb 2011
Leaf Number: 303
Location: Seattle, WA

Re: Normal range from SOC bar 1 today?

Mon Feb 21, 2011 2:24 pm

mwalsh wrote:My experience thus far would seem to indicate that you'd eventually loose bars.
The user manual seems to say all 12 bars will be used - it will be a % of the total capacity.
1st Leaf : 2/28/2011 to 5/6/2013
2nd Leaf : 5/4/2013 to 3/21/2017
Volt : 3/25/2017 to 5/25/2018
Model 3 : 5/10/2018 to ?

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turbo2ltr
Posts: 1376
Joined: Fri Jul 30, 2010 11:13 pm
Delivery Date: 04 Feb 2011
Leaf Number: 185
Location: Phoenix, AZ

Re: Normal range from SOC bar 1 today?

Mon Feb 21, 2011 2:30 pm

evnow wrote:
mwalsh wrote:My experience thus far would seem to indicate that you'd eventually loose bars.
The user manual seems to say all 12 bars will be used - it will be a % of the total capacity.
Certain aspects of the data on the CAN bus lead me to believe (but not prove) that the bars would always show 0-100% of whatever the total capacity is at that time. So if the capacity bar was at 50%, then the full scale (100%) SOC bargraph would be 50% of the original 24kwh.
Silver SL-e
Ford F450 Crew Cab Hybrid Conversion

User avatar
mwalsh
Posts: 9658
Joined: Thu Apr 22, 2010 10:10 am
Delivery Date: 05 Jan 2011
Leaf Number: 0213
Location: Garden Grove, CA

Re: Normal range from SOC bar 1 today?

Thu Jun 16, 2011 11:29 am

BTW, more data for you.....full measure of 12th bar use again today! Actually 7.5 miles, because of some stop-and-go traffic (so 1.5 miles on city streets, 5 miles highway at 66mph, and another mile in stop-and-go).

So what happened?

Yesterday I had the guys from Nissan come visit, so I played safe and had the car charged to 100%. Well, it turned out we didn't drive all that far, but it was far enough to use bar 12. Since I don't currently have my portable EVSE (on loan to JPVLeaf), I decided I wanted the comfort of a full pack when leaving from home today and put the car on charge anyway, manually. It took about 40 minutes to full.

So what did I surmise from this? Well I'm of the opinion that you can cram more into the upper bit of the pack IF you allow the pack to charge and rest before topping off. What I may do to try and validate this theory is charge to 80% using the timer and then top-off from 80% manually. Trying this both well in advance of needing the car and immediately before needing it. This should either reinforce or refute the notion I have of pack bleed-off from 100% charging.
2011 Blue Ocean SL with 85,000 miles
2015 pack on 12/30/15
Tinted windows
Bosch AGM 12v
Ecopia 422+ tires
L1 EVSE upgrade
FIAMM horns
Superbright LED lighting
2013 sun visors
LED shifter
Heated seats
GT-R map lamp lenses
Altima illuminated door switches

GroundLoop
Posts: 1725
Joined: Mon Sep 13, 2010 9:31 pm

Re: Normal range from SOC bar 1 today?

Thu Jun 16, 2011 3:40 pm

It appears that not all cars charge to the same level. Some charge to "281" some to "270". Yet everyone has a top bar. Either the graph is scaled, or the top bar covers a wider area on some cars than others.

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