danrjones
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Re: The 62kWh Battery Topic

Wed Jan 12, 2022 12:24 pm

watchdoc wrote:
Wed Jan 12, 2022 11:55 am
Probably a dumb question but how often do you guys record your leafspy results and how often do you balance your pack? I'm trying to come up with a routine.
I used to capture leafspy weekly but now just once maybe twice per month or when I'm expecting a three month adjustment.

I never balance the pack. Not purposefully anyway. Nothing in the manual about doing so, I don't think. I'll do a full charge maybe twice a year because I need it.
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frontrangeleaf
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Re: The 62kWh Battery Topic

Wed Jan 12, 2022 12:27 pm

danrjones wrote:
Wed Jan 12, 2022 12:24 pm
watchdoc wrote:
Wed Jan 12, 2022 11:55 am
Probably a dumb question but how often do you guys record your leafspy results and how often do you balance your pack? I'm trying to come up with a routine.
I used to capture leafspy weekly but now just once maybe twice per month or when I'm expecting a three month adjustment.

I never balance the pack. Not purposefully anyway. Nothing in the manual about doing so, I don't think. I'll do a full charge maybe twice a year because I need it.
Agree. I don't balance the pack intentionally. Haven't needed a full charge in quite a while, not since last winter. Keep it between 20-60% in the summer and 20-80% in the winter, roughly speaking. I don't obsess over a percentage here or there either.
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knightmb
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Re: The 62kWh Battery Topic

Wed Jan 12, 2022 1:15 pm

Great info. Is LeafSpy choosing the correct values when you set it up for the model year and battery size? Or is it something one has to manually correct?
GerryAZ wrote:
Tue Jan 11, 2022 10:06 pm
I will type it one more time because there is a lot of discussion in this thread comparing battery capacity in kWh (as indicated by Leaf Spy). Those kWh values depend upon the constant that is chosen on the Leaf Spy settings page. I believe the data from the integer value on the CAN bus is called HV BATT LEVEL in the service manuals I have for 2011 and 2015. The integer value from the CAN bus correlates with Wh or kWh with suitable multipliers. It is wrong to suggest that the integer value correlates with Ahr because voltage must be taken into account to compare ampere-hours with watt-hours and the battery voltage varies from full charge to discharge. The HV BATT LEVEL from the CAN bus is not perfectly linear, but it provides a good reference for remaining useable energy.

In regard to the screen images posted by Watchdoc: My 2015 had 1 QC and 4 L1/L2 charges when I picked it up. My 2019 had 1 QC and 6 L1/L2 charges when I picked it up. I did not have a way to read CAN bus information when I purchased the 2011. If your car was at a dealer for a while, they probably plugged it in a few times. Initial readings at 64 miles for my 2019 were:
AHr=175.15
SOH=99.29%
Hx=98.19%
V=376.50

After first full charge at 189 miles:
AHr=174.99
SOH=99.20%
Hx=98.95%
V=399.44
QC=1
L1/L2=7
Integer value from CAN bus=730 (represents HV BATT LEVEL)
730*65=47.45 kWh
730*75=54.75 kWh
730*77.5=56.575 kWh
730*80=58.40 kWh
This shows how much difference the multiplier chosen in Leaf Spy settings can make to the displayed kWh.
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GerryAZ
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Re: The 62kWh Battery Topic

Wed Jan 12, 2022 7:55 pm

OldManCan wrote:
Wed Jan 12, 2022 8:03 am
GerryAZ wrote:
Tue Jan 11, 2022 10:06 pm

Integer value from CAN bus=730 (represents HV BATT LEVEL)
Is this the value shown as GIDs in LSPro? If it is not GIDs then where would I find this integer value? Thank you
Yes, the integer value is what is shown as GIDs in Leaf Spy Pro. There are some forum users who don't like the term "GID" because it is not an official reference from Nissan.

In answer to Knightmb's question: I believe the latest version of Leaf Spy Pro has 77.5 as the default multiplier value.

In answer to Watchdoc's question: I have an Android device (prepaid phone which was never activated) that runs Leaf Spy whenever I drive the car. I let it record trip data automatically so I can look for specific information in the future, if needed. I also record energy from the wall and information from Leaf Spy every charge cycle in an Excel spreadsheet.
Last edited by GerryAZ on Wed Jan 12, 2022 8:13 pm, edited 1 time in total.
Gerry
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lorenfb
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Re: The 62kWh Battery Topic

Wed Jan 12, 2022 8:13 pm

GerryAZ wrote:
Wed Jan 12, 2022 7:55 pm
OldManCan wrote:
Wed Jan 12, 2022 8:03 am
GerryAZ wrote:
Tue Jan 11, 2022 10:06 pm

Integer value from CAN bus=730 (represents HV BATT LEVEL)
Is this the value shown as GIDs in LSPro? If it is not GIDs then where would I find this integer value? Thank you
Yes, the integer value is what is shown as GIDs in Leaf Spy Pro. There are some forum users who don't like the term GID because it is not an official reference from Nissan.

In answer to Knightmb's question: I believe the latest version of Leaf Spy Pro has 77.5 as the default multiplier value.


Actually, because there're various "adjustments" (multipliers) over time being made, i.e. it's not as consistent and reliable over time as using Ahr.
As has been stated before, Ahr is an industry standard when measuring battery capacity, irrespective of battery type, i.e. Li Ion, Lead acid, LFP, etc.
#1 Leaf SL MY 9/13: 76K miles, 47 Ahrs, 5.0 miles/kWh (average), Hx=70, SOH=73, L2 - 100% > 1000, temp < 95F, (DOD) > 20 Ahrs
#2 Leaf SL MY 12/18: 28K miles, SOH 105Ahrs/115Ahrs, 5.2 miles/kWh (average), DOD > 20%, temp < 105F

GerryAZ
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Re: The 62kWh Battery Topic

Wed Jan 12, 2022 8:23 pm

Ampere-hours is a good measurement for tracking long-term capacity of a battery, but it gives no information regarding level of charge or amount of energy available to use.
Gerry
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lorenfb
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Re: The 62kWh Battery Topic

Thu Jan 13, 2022 6:26 am

GerryAZ wrote:
Wed Jan 12, 2022 8:23 pm
Ampere-hours is a good measurement for tracking long-term capacity of a battery, but it gives no information regarding level of charge or amount of energy available to use.
Actually, using Ahr per mile to estimate range can be useful too. My '13 Leaf has a LeafDD gauge which displays the battery's remaining Ahrs.
Using my typical efficiency of 5 mi/kWh and converting to mi/Ahr (assuming a battery of 400 volts), I can estimate my remaining range quickly
and reliably by using an efficiency of about 2 mi/Ahr.
#1 Leaf SL MY 9/13: 76K miles, 47 Ahrs, 5.0 miles/kWh (average), Hx=70, SOH=73, L2 - 100% > 1000, temp < 95F, (DOD) > 20 Ahrs
#2 Leaf SL MY 12/18: 28K miles, SOH 105Ahrs/115Ahrs, 5.2 miles/kWh (average), DOD > 20%, temp < 105F

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Marktm
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Re: The 62kWh Battery Topic

Thu Jan 13, 2022 8:49 am

lorenfb wrote:
Thu Jan 13, 2022 6:26 am

Actually, using Ahr per mile to estimate range can be useful too. My '13 Leaf has a LeafDD gauge which displays the battery's remaining Ahrs.
Using my typical efficiency of 5 mi/kWh and converting to mi/Ahr (assuming a battery of 400 volts), I can estimate my remaining range quickly
and reliably by using an efficiency of about 2 mi/Ahr.
Ahrs ratings are ingrained in many of us as the "reliable"? measure of energy contained in a new battery to use in the design of energy systems with storage. Of course it can be tracked and estimated as the batteries lose capacity - but I've always relied on actual tests for that information. For all 3 batteries that I've had experience with in my Leafs, I've used the LS Ahrs to determine the loss of range over time at 100% charge. Again, my driving habits determine the available range and for the most part use LS's range estimate with a best guess of the average mi/kWh for the remaining trip.

lorenfb - your comment on the LeafDD prompted me to look more closely at LS's information and found the remaining Ahrs on the "table" screen. It corresponded fairly close to the %SOC - thanks
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fester
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Re: The 62kWh Battery Topic

Fri Jan 14, 2022 3:56 pm

Didn't know how to attach an image, but I did at trickle charge to full charge today (from 95% earlier charge) prior to some incoming snow, and since there were questions concerning what the Leaf charge circuit was doing in the last 5%. I monitor my household power with a Brultech GEM and Dashbox, so I just watched the power input to the trickle charger. Basically I saw an avg of 1450 watts to the charger for about two hours, then tapered down to about 600 watts during the next half hour. The charge circuit then waited about 5 minutes then delivered 3 more 15 minutes charges at around 600 watts. With around 5 min wait between these last 3. Your results may vary but that was with my 2022 SV+.
I still have questions about how frequently my 12v is charged, but I think in the next week or so, I'll attach a voltage data logger to the 12v and leave it attached for a week or so. Should give me a good general idea of how the Leaf is handling the 12v. I'll post afterwards...

LeftieBiker
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Re: The 62kWh Battery Topic

Fri Jan 14, 2022 4:29 pm

I look forward to seeing your results the results on the 12 volt battery charging. I checked both our cars' 12 volt battery voltage (also because of the approaching storm and frigid weather), and had to put both of them on the maintainer - the SV+ took almost 10 hours of charge, about 8AH, into that tiny battery - to get to 12.95 volts from 12.24 volts. I picked up a Noco Genius 2 amp maintainer for the sump pump battery, but I think that for the Winter I'll use it for the cars.
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