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JeremyW
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Delivery Date: 23 Jun 2012
Leaf Number: 19136
Location: San Gabriel, CA

Re: LEAF CANbus decoding. (Open discussion)

Sun Oct 06, 2013 1:54 pm

Sweet! It's better that it's the Nav time anyway, that's GPS based right?
Former 2012 SL leasee 6/23/12 - 9/23/15
Former Fit EV leasee.
Now driving Spark EV and Model 3.

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TickTock
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Joined: Sat Jun 04, 2011 10:30 pm
Delivery Date: 31 May 2011
Leaf Number: 3626
Location: Queen Creek, Arizona
Contact: Website

Re: LEAF CANbus decoding. (Open discussion)

Sun Oct 13, 2013 5:31 am

JeremyW wrote:Sweet! It's better that it's the Nav time anyway, that's GPS based right?
That is my guess since it doesn't give you a "set" option, but rather, just the option to offset the time. Subtle difference but implies it is getting an accurate time from somewhere instead of generating it. I have added this to CANary and it seems to be working quite well to keep the clock synchronized. Now I need to figure out how to program the eyebrow clock via canbus so I can keep that one synchronized, too. :-)

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garygid
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Leaf Number: 000855
Location: Laguna Hills, Orange Co, CA

Re: LEAF CANbus decoding. (Open discussion)

Sun Oct 13, 2013 5:39 am

Where did you find the battery series resistance, please?
See SOC/GID-Meter and CAN-Do Info
2010 Prius
2011 LEAF, 2014 Tesla S85
2018 & 2019 Tesla Model 3
PU: SDG&E
Solar PV: 33 x 225W -> 7 kW max AC
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TickTock
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Contact: Website

Re: LEAF CANbus decoding. (Open discussion)

Sun Oct 13, 2013 5:52 am

garygid wrote:Where did you find the battery series resistance, please?
It is a computed value. Once a second, I algorithmically find the value of Resr that minimizes the variation in the formula Vbat+Resr*Ibat. Once I gather enough data to show a trend, I hope to look for a message that tracks it. However, my Leaf really doesn't seem to be changing much - hovers around 100mOhms.

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TickTock
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Re: LEAF CANbus decoding. (Open discussion)

Sun Oct 13, 2013 6:56 am

garygid wrote:
TickTock wrote:Take a look at https://docs.google.com/spreadsheet/ccc ... MUXc#gid=5 (be sure to note the different tabs at the bottom). It contains everything I could find that has been unearthed on the various canbus messages. The content came from the contributions of Turbo2ltr, garygid, and many others. If you discover anything useful (or not :-)) please let us know!
Accessing the spreadsheet link from my Android Tablet,
I get what appears to be an endless loop (not tested
to the end). :o
(Moving from the other thread)

Sounds like a GoogleDrive bug. See if any of these links work (other google docs):
https://docs.google.com/spreadsheet/ccc ... MUXc#gid=0
https://docs.google.com/spreadsheet/ccc ... _web#gid=1
https://docs.google.com/spreadsheet/ccc ... _web#gid=0

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garygid
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Re: LEAF CANbus decoding. (Open discussion)

Sun Oct 13, 2013 7:58 am

Thanks, the other links helped me figure out that Google was in
a login loop, perhaps because I was already auto-logged in.

The loop was repeating too fast to use their enter password
and login, but I was able to use the "log out and login as another
user" link, and re-login and then I could see the spreadsheet.

Thanks, a good resource.
See SOC/GID-Meter and CAN-Do Info
2010 Prius
2011 LEAF, 2014 Tesla S85
2018 & 2019 Tesla Model 3
PU: SDG&E
Solar PV: 33 x 225W -> 7 kW max AC
Craigslist: Xm5000Li Electric Motorcycle

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garygid
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Re: LEAF CANbus decoding. (Open discussion)

Sun Oct 13, 2013 8:06 am

QC-CAN Bus:

Eventually you can add a QC bus sheet, with the five MsgIDs that I observed
(as I recall from the posted QC log), being hex 100, 101, and 102, apparently
from the car, and hex 108 and 109, apparently a reply from the QC device.

Perhaps the Description column heading should be "Description ( unofficial )"
or something similar, to indicate the tentative, uncertain, and unofficial nature
of our interpretations of the data bytes? Simply a CYA precaution.

There is a "QCMessage data decoding" thread specifically for QC CAN details:
http://www.mynissanleaf.com/viewtopic.php?f=44&t=6255" onclick="window.open(this.href);return false;

There is another related "Open Chademo... " topic here:
http://www.mynissanleaf.com/viewtopic.php?f=26&t=7764" onclick="window.open(this.href);return false;
See SOC/GID-Meter and CAN-Do Info
2010 Prius
2011 LEAF, 2014 Tesla S85
2018 & 2019 Tesla Model 3
PU: SDG&E
Solar PV: 33 x 225W -> 7 kW max AC
Craigslist: Xm5000Li Electric Motorcycle

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TickTock
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Re: LEAF CANbus decoding. (Open discussion)

Sun Oct 13, 2013 8:53 am

Thanks Gary,
I created the tab but so far there doesn't seem to be much information documented in the thread (at least that I could find in a 5 minute search).

GregH
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Re: LEAF CANbus decoding. (Open discussion)

Mon Oct 14, 2013 11:30 am

TickTock wrote:
garygid wrote:Where did you find the battery series resistance, please?
It is a computed value. Once a second, I algorithmically find the value of Resr that minimizes the variation in the formula Vbat+Resr*Ibat. Once I gather enough data to show a trend, I hope to look for a message that tracks it. However, my Leaf really doesn't seem to be changing much - hovers around 100mOhms.
Have you noted the increased impedance at cooler temps? The LeafDD also records series resistance calculated at high current points and logs the SOC and temperature at the time the test is done. When we had a few cool days recently and the battery temps dropped from 27-33 down to 18-20 I also saw the impedance rise from 88-90mOhm to 100. Not a surprise I guess, but this is the first time I'd seen it numerically.
'17 blue Volt Premier w/ACC
'12 SL black Leaf
'11 SL blue Leaf
RAV4-EV 2002-2005
Gen1 & Gen2 EV1 1997-2003
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TickTock
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Re: LEAF CANbus decoding. (Open discussion)

Wed Oct 16, 2013 5:41 am

GregH wrote:
TickTock wrote:
garygid wrote:Where did you find the battery series resistance, please?
It is a computed value. Once a second, I algorithmically find the value of Resr that minimizes the variation in the formula Vbat+Resr*Ibat. Once I gather enough data to show a trend, I hope to look for a message that tracks it. However, my Leaf really doesn't seem to be changing much - hovers around 100mOhms.
Have you noted the increased impedance at cooler temps? The LeafDD also records series resistance calculated at high current points and logs the SOC and temperature at the time the test is done. When we had a few cool days recently and the battery temps dropped from 27-33 down to 18-20 I also saw the impedance rise from 88-90mOhm to 100. Not a surprise I guess, but this is the first time I'd seen it numerically.
Yeah, that does appear to be the case. I was reading between 89-99mOhm in the summer and now am seeing 102-111. However, I had a formatting bug in my tripLog so I only have a few datapoints (that I manually captured). I was rounding to the nearest tenth so all my tripLog entries read 0.1 :-/

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