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garygid
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Re: Kudos to the CANbus SOC meter team!

Mon Aug 22, 2011 4:31 pm

I suspect that the top 2% of the SOC contains only 0.02% of the battery's energy. Thus, charging to 98% or 100% makes no noticable difference.
See SOC/GID-Meter and CAN-Do Info
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mwalsh
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Re: Kudos to the CANbus SOC meter team!

Thu Sep 01, 2011 8:19 am

I really don't know where to put this. I know we've had discussion on the linearity of the discharge curve, but I'll be darned if I can find it again now I come to look.

Last night I had the opportunity to discharge further than I'd done before since I got Gary's meter - down to ~10% SOC, whereas previously I'd only discharged to ~20%. What I noticed is that the discharge curve remained pretty predicable down to around 13-14%, after which consumption appeared to near double. Now I've only done this once, and this is only my pack in it's current condition, but if further adventures reveal similar results, I would say that you could count on performance that is very predictable for the middle 75% of the pack.

And my further observations from this week are that I seem to get around 1 mile per % SOC in that more predictable part of the pack while cruising at highway speeds (between 65mph and 70mph), assuming relatively flat terrain and no climate control use.
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gascant
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Re: Kudos to the CANbus SOC meter team!

Thu Sep 01, 2011 8:45 pm

mwalsh wrote: And my further observations from this week are that I seem to get around 1 mile per % SOC in that more predictable part of the pack while cruising at highway speeds (between 65mph and 70mph), assuming relatively flat terrain and no climate control use.
I'd say the same thing, especially since I'm about 5 MPH slower than you. I rarely use climate control and my commute is pretty darned flat.
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garygid
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Re: Kudos to the CANbus SOC meter team!

Fri Sep 02, 2011 8:42 am

Next steps, for those interested:

1. Download and use my evolving CAN-Do program with its Logs and Recipes.
See http://www.wwwsite.com/puzzles/cando/" onclick="window.open(this.href);return false;

2. Modify the SOC-Meter to do logging of YOUR OWN usage of the LEAF.

I should try this "mod" out here first, but have not yet had the energy.
See details in the thread:
"SOC-Meter for One-CAN Logging & Graphing".
See SOC/GID-Meter and CAN-Do Info
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gascant
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Re: Kudos to the CANbus SOC meter team!

Sat Sep 03, 2011 11:47 am

garygid wrote: 2. Modify the SOC-Meter to do logging of YOUR OWN usage of the LEAF.

"SOC-Meter for One-CAN Logging & Graphing".
Here's the link.
http://www.mynissanleaf.com/viewtopic.php?f=44&t=4929" onclick="window.open(this.href);return false;
I think all the parts should be available at your local Fry's, no?
Or, the kit idea is pretty good, too. I'm thinking it might be worth mounting the female connector into the case of the SOC meter?
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garygid
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Re: Kudos to the CANbus SOC meter team!

Sat Sep 03, 2011 12:49 pm

GOOD Suggestion!

You are correct, mounting a 9-pin D female "Logging Port" on the box is better.

The slight difficulty is that this requires a person to add a "large" D-slot, ...
and two easy-to-drill small holes for the two mounting screws/bolts.

There is sufficient room inside the box near the front edge of the Right Side of the SOC-Meter.

Adding the D-slot might be a problem for many, particularly if the meter is already built. However, drilling 7 to 9 quarter-inch holes might allow one to finish the slot with an eXacto knife (or similar).

I will add the slot and 2 mounting holes to "Rev 2a" of my Hole Template, and post it.
See SOC/GID-Meter and CAN-Do Info
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Boomer23
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Re: Kudos to the CANbus SOC meter team!

Sat Sep 03, 2011 2:11 pm

I just wanted to add my further kudos to the list of the grateful SOC meter owners. Mine was put together at a build session with garygid and starry on Thursday. It already had the 1.08 version software and it is happily showing all of the five data types that mwalsh has mentioned.

I mounted mine the same way that mwalsh did, routing the 6 foot OBD cable over the steering wheel area and down to the front part of the center console. I have to get used to NOT looking down there too often while driving, for the sake of safety. The SOC numbers don't change too fast, but looking at the Power and Charge (regen) numbers rapidly changing can get distracting... :lol:

Thanks again to the master designer/builder/brain trust of MNL, Mr. gid, and to his small army of collaborators.
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gascant
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Re: Kudos to the CANbus SOC meter team!

Sat Sep 03, 2011 4:03 pm

I just "flashed up" to V 1.08 this afternoon and it's great! And, I agree, watching it too much can get distracting. Might be good to find a way to mount it on top of the dashboard, just in front of the side pillar window.

Did I actually see 40 kW of regen power while braking downhill??
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garygid
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Re: Kudos to the CANbus SOC meter team!

Sat Sep 03, 2011 11:33 pm

I have seen 34 kW Regen,
and 240 Amps Power-out current.

It sits well on the shelf right on top of the Nav system.

Glad you got the "flashing" working, and like the new F1.08 firmware.
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squirrelmeat
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Re: Kudos to the CANbus SOC meter team!

Sun Sep 04, 2011 5:10 pm

garygid wrote: I will add the slot and 2 mounting holes to "Rev 2a" of my Hole Template, and post it.
If you have a template with space for a DB-9 for logging I'm more then willing to give it a try (I have yet to start on building my meter).

Besides cutting and filing to make the proper hole for the DB9 it looks as if one would need to gouge out the ribs from the inside of the box.

(and this after I told gascant it would be quite painful to mount the connector to the box)

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