LeafDD - Dash Display for Leaf

[TomT]

I, too, vote for raw Gids. A percentage of useable Gids, where 281 (or, better yet, a programmable number for those with capacity loss) is 100% and 7 is 0% would also be nice for those who prefer not to do the math in their head... Yes, I do realize that rampant featuritise is already creeping in!

I suppose I could add Gids/2.81 if there is high demand for that although as you may have guessed from some of my other posts I'm somewhat opposed to the whole concept. As an absolute number, Gids by itself works pretty well and there are other, newer indications of relative battery health/capacity in the Group 1 data now so the old practice of comparing Gids on a full charge to 281 is somewhat passe.

[Stoaty]

I, too, vote for raw Gids.

I don't have a problem with raw Gids (they are a regular part of my diet ), but would like the option to display as Gid percent instead. I used raw Gids for a long time (8 or 9 months), but found that the Gid percent was more intuitive for me (and yes, I know that a full charge will be about 92% for me, so that means I have lost about 8%, a bonus without doing another calculation).

[lincomatic]

I got rid of gid % last year on LeafCAN as well, and got some pushback. I just don't find it useful at all.
With the raw gids, I know exactly where LB and VLB are.

Maybe you could make a long press on let the user switch back & forth.

[JeremyW]

What about raw gids * 78 for 'raw kWh' ?

[GregH]

I, too, vote for raw Gids.

I don't have a problem with raw Gids (they are a regular part of my diet ), but would like the option to display as Gid percent instead. I used raw Gids for a long time (8 or 9 months), but found that the Gid percent was more intuitive for me (and yes, I know that a full charge will be about 92% for me, so that means I have lost about 8%, a bonus without doing another calculation).

I find the Gids to be most healthy when uncooked!
Maybe I'll throw in a hidden menu for the diehards that want to multiply the raw Gids by something else... 0.356 (1/2.81), 0.78 etc.. You could tweak the multiplier monthly so that a full charge was 99 or so.. Oh wait, or you could just display the SOC..

[Stoaty]

I find the Gids to be most healthy when uncooked!
Maybe I'll throw in a hidden menu for the diehards that want to multiply the raw Gids by something else... 0.356 (1/2.81), 0.78 etc.. You could tweak the multiplier monthly so that a full charge was 99 or so.. Oh wait, or you could just display the SOC..

Can we divide by pi? If so, will we be able to enter all of the decimal digits that are known for pi?

[TonyWilliams]

I got rid of gid % last year on LeafCAN as well, and got some pushback. I just don't find it useful at all.
With the raw gids, I know exactly where LB and VLB are.

If you can remember 49 and 24, you can remember 17.4% and 8.5% for LBW and VLB, respectively. I want to see percent Gid.

Ya know, this stuff was figured out in aviation long ago (after plenty of crashes). Human factors just do not lend themselves to mental math and memorized numbers.

If I push the power up on that Big Jet 898 for take off, I don't really care if the turbine hot section is turning 123,456 RPM, or the exhaust pressure ratio is 87.654%. I do care that if I need full power, I want to see 100% power on the meter. My ten year old could figure that out. Actually, anybody driving my LEAF could figure out 100%. Even if it said 98.7%, they intuitively know it's mostly full. With 278 Gid displayed, there's nothing intuitive about that any more than 123,456 RPM.

My next adjustment that I've plugged for is Gid2%. I know it's not a big deal for many, but for folks like me who like accuracy and useful data, I want that same meter that reads 100% at max to read 0% when the party is over.

So, specifically, I want it to read the formula that Gary provided:

Full charge = 100 ((Gid - 7) / (281 - 7)) = 100% where Gid is 281

Turtle = 100 ((Gid - 7 ) / ( 281 - 7)) = 0% where Gid is 7


Then I want this percent to display a "Rated Range", just like Tesla:

Range = ((4 * 21) * 100% = 84 miles, which happens to be the exact 2013 LEAF EPA rating for 100% charge. Yes, it would be awesome to be able to select the economy to something other than 4, or nirvana would be to use the actual displayed dash economy since last reset !!! The default would be four.

When the car is at or very close to Turtle (it's not indexed on Gids), then the meter will show 0% and 0 miles.

[garygid]

I try to give the user choices, so that new users can try
out the options, and experienced users can select the
"units" that they find most helpful.

Many find %Gids the easiest for themselves to use.

Yes, I have yet to supply the %GID2 value, but I
could easily add it to the choices, or make a
custom firmware for one user who wants it.

I prefer meters that cover the full operational range,
rather than one that has a hidden reserve, so I would
have the GID2 meter show -7 at the bottom, and %Gid2
show a negative percentage when under 7 GIDs.

Cheers, Gary

[DanBaldwin]

Looks great, and I love the idea of covering the "tree builder" with something that actually displays useful information

If you're looking for a "wish list", I'd like a true DTE or DTT (distance to turtle). When you reset the DTE display, you would wait for tick down (transition) in the GID count. When that occurs you log the GIDs and miles. Then every time you see a transition of the GIDs, you subtract logged miles from current miles, and subtract current GIDs from logged GIDs then miles/GIDs = miles per GID, times GIDs remaining (current GIDs minus turtle GIDs) gives you DTE. That's assuming you have access to at least one of the mile indications.

I'd also love to see the regen/friction brake display thingy.

Do the shunt active bits only come on while charging, and only when charge is near full?

I vote for uncooked GIDs. I don't mind if they are blanched, but I prefer they have at least a little crunch.

Let me know when I can take you some money. Do you take cash with proper ID?

[GregH]

I got rid of gid % last year on LeafCAN as well, and got some pushback. I just don't find it useful at all.
With the raw gids, I know exactly where LB and VLB are.

If you can remember 49 and 24, you can remember 17.4% and 8.5% for LBW and VLB, respectively. I want to see percent Gid.

Ya know, this stuff was figured out in aviation long ago (after plenty of crashes). Human factors just do not lend themselves to mental math and memorized numbers.

If I push the power up on that Big Jet 898 for take off, I don't really care if the turbine hot section is turning 123,456 RPM, or the exhaust pressure ratio is 87.654%. I do care that if I need full power, I want to see 100% power on the meter. My ten year old could figure that out. Actually, anybody driving my LEAF could figure out 100%. Even if it said 98.7%, they intuitively know it's mostly full. With 278 Gid displayed, there's nothing intuitive about that any more than 123,456 RPM.

My next adjustment that I've plugged for is Gid2%. I know it's not a big deal for many, but for folks like me who like accuracy and useful data, I want that same meter that reads 100% at max to read 0% when the party is over.

So, specifically, I want it to read the formula that Gary provided:

Full charge = 100 ((Gid - 7) / (281 - 7)) = 100% where Gid is 281

Turtle = 100 ((Gid - 7 ) / ( 281 - 7)) = 0% where Gid is 7


Then I want this percent to display a "Rated Range", just like Tesla:

Range = ((4 * 21) * 100% = 84 miles, which happens to be the exact 2013 LEAF EPA rating for 100% charge. Yes, it would be awesome to be able to select the economy to something other than 4, or nirvana would be to use the actual displayed dash economy since last reset !!! The default would be four.

When the car is at or very close to Turtle (it's not indexed on Gids), then the meter will show 0% and 0 miles.

Wow.. you engineers really like to make this complicated! what's the opposite of K.I.S.S.?

Maybe we should get rid of gallons for measuring gasoline and just assume all cars have 10 gallon tanks.. then we can display remaining fuel as a fixed calculated percent like Gid% or Gid2% (or whatever). Gas stations could display % added...

We could normalize voltage and current also if you wish.. Maybe just display % voltage.. ie, divide by 3.94.. Because really, who wants to have to remember that the Leaf charges to 394V? Maybe normalize all the cell voltages too.. divide them all by 4.1??

Not all Leafs charge to 281.. many don't even come close anymore and who's to say a 2014 Leaf might charge to 320 Gids? The only truly common unit is the raw uncooked Gids. Just as you get accustomed to figuring out how many gid% it takes to get home from work, you can do the same for raw Gids.. it's not hard, it just takes a little familiarization. Similarly the pack voltage graph is extremely helpful down in the low Gid range to see how much juice you really have left. The old RAV4-EVs had this and the turtle mode was tied directly to it.. As long as the voltage was high enough the turtle stayed away..

I'm going Steve Jobs ZEN on this thing, trying to make it simple and intuitive. Things that really are a percentage (like SOC) will be displayed as such, all else will have appropriate units.