Page 7 of 45

Re: *NEW* Dash Display for Leaf

Posted: Fri May 24, 2013 4:15 pm
by GregH
Nubo wrote:
GregH wrote:I'm also curious to hear where people would like to mount it. It's pretty small and light but has that standard OBD2CABLES.com 6ft right angle connector cable on it.
;) :lol:
That's where I've got my proto right now! I think it'll need some shade to be better visible in bright daylight driving. The one downside is that with the stereo blasting, I've accidentally left the left turn signal on while driving down the freeway because I couldn't see the turn indicator.. :shock:

Re: *NEW* Dash Display for Leaf

Posted: Fri May 24, 2013 4:18 pm
by GregH
Unfortunately I only have two extras right now.. I thought I'd have a dozen by now but my assembly gal has been side tracked the last few days. I should have more in a few days. I'll bring the two extras to folks at the Hometown Buffet tomorrow around 11 if you'll also be at Phil's potluck the following week..

Re: *NEW* Dash Display for Leaf

Posted: Fri May 24, 2013 7:51 pm
by dcpatters
GregH. I'm in Irvine. If you need a need a beta tester, 2013 LEAF, I'm available.

Re: *NEW* Dash Display for Leaf

Posted: Fri May 24, 2013 9:59 pm
by garygid
GregH wrote:
garygid wrote:Greg,
Assigning the Shunt-On bits in the order 4,8,1,2 appears to be
the correct order for applying then to corresponding cell-pairs.
No, that's not correct.
Aell, I could be wrong.
Do you think that 8,4,2,1 is the correct ordering?

The app we have now allows the user to specify the order,
so we could do some comparisons tomorrow, if you are willing.

I look forward to seeing your new Dash Display.
Cheers, Gary

Re: *NEW* Dash Display for Leaf

Posted: Fri May 31, 2013 10:33 pm
by GregH
Update.. I've got a dozen working LeafDD boards at the moment and will have a few more in a few weeks. Unfortunately after that it won't be until late July for any more until I get a new batch of OLED displays (the distributors are sold out, new batch in mid July). Here's the latest cover cad work:
Image
The cover will be a dark grey or more likely charcoal black (still working that out), but I expect to have units in hand next Friday which means I can start shipping the first units then.
Disregard the black thing on the right side of the image, that's just where the programming dongle goes.
The V1.1.1 software has been running solid in my car and a few folks are testing the slightly older V1.1.0 software now.
I'll start taking orders next week, if you're interested then e-mail me directly at dashdisplay at gmail.com

P.S. I'll amend the first post in this thread with a user manual of sorts for the LeafDD later this weekend.

Re: *NEW* Dash Display for Leaf

Posted: Fri Jun 07, 2013 11:12 am
by GregH
A quick 4min intro to the Leaf Dash Display..
I have (almost finished) units ready to ship.. just waiting on the first batch of gray enclosures due at the end of NEXT week. I might order some black enclosures later in the month if there is interest.

Sorry about the flicker in the video, that's an artifact of the iPhone camera, not the display.
http://youtu.be/Js8Ek64zvp0

Re: *NEW* Dash Display for Leaf

Posted: Fri Jun 07, 2013 8:08 pm
by EricBayArea
Great video, thanks!

I have some questions and assumptions about some components you explain. Was hoping you could confirm or educate me:

First Screen
1) GID - This is the # out of 281 (for a brand new battery pack)?
2) SOC % - For a pack with 95% heath, would this show "100%" if I charged fully using "100%" setting?
3) GID % - For a pack with 95% heath, would this show "95%" if I charged fully using "100%" setting?
4) Ah% - Shouldn't this show the same as #2 or #3?

Second Screen
Health - Would this be the same as the GID % if I charged fully using "100%" setting?

Other
Is there a screen/setting that shows the number of Kw's the motor is putting out or putting in? Similar to the Energy Screen that car has built in? I heard that the regen shown by the car is not always accurate and maxes out on the circular graph at a lesser number than the car actually is collecting.

With all that said, it looks like you did a great job - can't wait to get my hands on it and fret even more about the battery in my LEAF :shock:

Re: *NEW* Dash Display for Leaf

Posted: Sat Jun 08, 2013 8:51 pm
by GregH
EricBayArea wrote:Great video, thanks!

I have some questions and assumptions about some components you explain. Was hoping you could confirm or educate me:

First Screen
1) GID - This is the # out of 281 (for a brand new battery pack)?
2) SOC % - For a pack with 95% heath, would this show "100%" if I charged fully using "100%" setting?
3) GID % - For a pack with 95% heath, would this show "95%" if I charged fully using "100%" setting?
4) Ah% - Shouldn't this show the same as #2 or #3?

Second Screen
Health - Would this be the same as the GID % if I charged fully using "100%" setting?

Other
Is there a screen/setting that shows the number of Kw's the motor is putting out or putting in? Similar to the Energy Screen that car has built in? I heard that the regen shown by the car is not always accurate and maxes out on the circular graph at a lesser number than the car actually is collecting.

With all that said, it looks like you did a great job - can't wait to get my hands on it and fret even more about the battery in my LEAF :shock:
Thanks! Sure thing..
Page 1:
1: Yes, raw Gids from the EV-CAN bus. Although there is nothing magic about 281. Many of the new 2013s can charge to 282-284. I saw 281 on my new 2012 only a few times. Now best I see is 270-272.
2: The true SOC will be 80% at 80% and about 95% at "full". Regardless of your battery capacity. Ie each percent shrinks over the years as your pack loses capacity (if you're in a warm climate).
3: This is just Gids * .356... 281 or higher will cap at 99.99%. Just a convenience for those brought up on the old Gid meters.
4: it's #2 * your pack capacity. So if you have a 66Ah pack capacity and charge to 80% SOC, this will be 52.8Ah... The idea was to have a constant unit (like Gids) but with more precision and less hysteresis (ie, you get credit for regen!). While its fun to look at, I still find myself going back to good ole Gids..

Page 2:
Health would be more precise than trying to use Gids in theory. Amp hour Capacity may ultimately be best. I found the "health" number in the Group 1 active CAN data and on all the 2011/12 cars it seems to be a "% of new" capacity.. My car was 66.1Ah new and showed just over 100% health. Now it's around 63.5Ah (if memory serves) and about 95% health. Oddly the two 2013s I've tried so far showed 67.3Ah capacity and 111% and 115% health.. ??? It'll be interesting to see what others get as we get more units in the field.

And yes, it doesn't show kW (Vpack * Amps), but it prominently shows Amps at the top. It takes slightly more Amps to get the same power at lower SOCs but it's similar and fun to watch. Especially alongside the pack voltage "dot".. As you use power and Amps grow from the top left corner you see the voltage dot dip right also.. Similarly with strong regen or DCQC (like the video) the Amps grows from top right and you see the voltage spike up to the left slightly. The Vpack dot becomes a lot more important at lower SOCs (like below VLBW). At some point near the bottom of charge the voltage becomes more important than SOC, Gids or anything.. I guess at the very bottom you're better off on Page 3 :)

Re: *NEW* Dash Display for Leaf

Posted: Thu Jun 13, 2013 7:28 pm
by EricBayArea
Thanks for the updated pics of the screens. Forgive my ignorance but I'm going to ask a few more questions...

So for a car with 12 capacity bars (CBs) and a car with 8 CBs, this will always show 95% when someone charges to "100%?" Why is that?
GregH wrote: Image
Precise SOC from the car. This will go up to about 95% on full and down to a few percent on empty, regardless of you're battery capacity. Fun to watch and it gives responsive feedback for regen (unlike Gids).
So this % readout will age with the health of the pack? Meaning, if a car shows 12 CBs this will show one number, and when that car shows 10 CBs, this will then show a lower number... when charged to "100%" ?
GregH wrote: Image
Gid%.. This is just the raw Gids multiplied by .356 (99.99 max) for the convenience of those accustomed to the older Gid-meters. Press again for:
Thanks in advance. Can't wait to receive mine!

Re: *NEW* Dash Display for Leaf

Posted: Fri Jun 14, 2013 6:56 am
by garygid
1. The SOC describes how full the cell is, but is not a measure of the,
size (capacity) of the cell. Like a AAA cell and a D cell might each be
full (say 99% State of Charge) at 1.52 volts each, but the D cell, with
its much larger Capacity, would be holding a lot more energy (watt-hours).

2. Yes, the GIDs (or %GIDs) attempt to indicate the amount of
(hopefully usable) energy in the battery pack. So, if the capacity
drops to 50%, even when full, the battery pack would contain
only about half of the energy that the "new" battery could hold.