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Boomer23
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Re: I want my 281!

Mon Sep 12, 2011 2:25 pm

abasile wrote:
Stoaty wrote:What color was the LED on tbleakne's SOC meter. Did it look good with the car? Was it easy to read (even in sunlight)?
tbleakne's meter is black, with blue LEDs. It blends in well enough, and looks decent. However, it isn't as easy to read as I would prefer, particularly at an angle. Reading it in sunlight is difficult at best. However, at least for myself, I wouldn't consider that a showstopper.
I have an identical unit. If mounted on the center console, all the way forward of the "shifter" and below the center nav display, the SOC meter is usually in shade and is easy to read. It is away from the view of the road ahead, though, so gazing at the display is "unsafe at any speed". Quick glances are the ticket.
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TomT
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Re: I want my 281!

Mon Sep 12, 2011 2:32 pm

GM may have been on to something with liquid cooling after all...
mwalsh wrote:Differences last night.....cooler night and charging from over 50% SOC. So I'm going to put it down to pack temps (which is something I've suspected in the past).
Last edited by TomT on Tue Sep 13, 2011 11:23 am, edited 1 time in total.
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Re: I want my 281!

Mon Sep 12, 2011 2:37 pm

garygid wrote:Raw SOC * 100 / 281 = Percent SOC.

Percent SOC * 281 / 100 = raw SOC
I guess that was kind of my point... 100% should be whatever the raw # is when your particular car on that particular day charges to 100% and 0% should be 4# or 5# (at whatever point the car stops moving)... That is if you want to call this State of Charge rather than estimated usable Ah or Wh or whatever. Otherwise we have all sorts of caveats like "the car stops moving at 1.4%" or "often the car only charges to 96% or 97%". It just seems arbitrary enough that it might be better just to use the raw# rather than bending over backward to get a percentage.

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garygid
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Re: I want my 281!

Mon Sep 12, 2011 6:26 pm

Mike,
You got 100% (281 raw), congrats.
Lower battery pack temperature, it appears.

I need to give you a Red plastic "Cell" to put over your Red LED display. It might make the overexposed Red digits photograph better. The red gell does make the digits readable in at least some sunlight conditions.

At the moment I do not have a medium-dark or dark Blue "cell", but I expect that it will help in a similar manner.

We call the LEAF's value "SOC" (in quotes), for lack of a better name. Maybe "Fuel" is better, since the LEAF appears to derive its Fuel-Bars from this number. But, whatever the name, it is not a perfect indicator of ... anything.

We have no inside information about the meaning of the CAN-bus values ... it is all (slightly) educated GUESSES.

But, the "SOC %" and "SOC raw" (that is from the EV-CAN bus) are equivalent.
Last edited by garygid on Tue Oct 11, 2011 8:37 pm, edited 1 time in total.
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mwalsh
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Re: I want my 281!

Tue Sep 13, 2011 11:21 am

99.6% / 280 last night. Charging starting from above 50% once again, but a slightly warmer night.
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garygid
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Re: I want my 281!

Tue Sep 13, 2011 12:38 pm

It seems that a warmer Battery Pack (or battery temperature reading)
will cause a lower SOC value. It would seem that one or more of these are involved:

1. the controller stops charging when some value (like Pack or Cell voltage) is a bit lower.

2. the components that are used to "create" the SOC value are a bit lower.

3. there is a temperature correction applied to some reading or value.

It looks like my next addition to the SOC-Meter's firmware should be "Mode 3" (temperatures), with Battery pack temp in Degrees C as "c20.0" and "F68.0" for 20.0 ºC, perhaps covering the range F-9.9 to F99.9 and c-9.9 to c99.9 ...
Thoughts?
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Boomer23
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Re: I want my 281!

Tue Sep 13, 2011 8:48 pm

mwalsh wrote:99.6% / 280 last night. Charging starting from above 50% once again, but a slightly warmer night.
Mine was 100% and 281 this morning after a full charge.
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garygid
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Re: I want my 281!

Tue Sep 13, 2011 9:27 pm

Who will be the first to hit 100.3% (282 raw)? :D :D

Or, is 281 really the maximum?
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mwalsh
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Re: I want my 281!

Wed Sep 14, 2011 5:43 am

Boomer23 wrote:Mine was 100% and 281 this morning after a full charge.
Were you charging from above 50%?
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2015 pack on 12/30/15
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Bosch AGM 12v
Ecopia 422+ tires
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LED shifter
Heated seats
GT-R map lamp lenses
Altima illuminated door switches

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Re: I want my 281!

Wed Sep 14, 2011 9:21 am

This morning's "100%" charge: 95.3%/268 with 393.5V battery. Started below 50% SOC.
1st Capacity Bar loss 30k mi 16mo
2nd- 49k mi 25.5mo 51.5Ah
3rd- 73k mi 36.5mo 46.9Ah
4th- 86.5k mi 43mo 42.6Ah
5th- 101k mi 50.5mo 38.4Ah, end 36.1Ah
New Battery 9/28/15 104k mi 66.1Ah
1st- 160.5k mi 34mo 54Ah
2nd- 184.4k mi 53mo 49Ah

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