TimLee
Posts: 2810
Joined: Thu Jan 20, 2011 9:40 am
Delivery Date: 17 May 2011
Leaf Number: 2026
Location: Chattanooga, TN

Re: Mini-QC Rapid-Charger (RC) Project for LEAF QC Port

Sun Mar 27, 2016 9:48 am

dwl wrote:... Can anyone please advise whether there have been issues with different reported SOC values between DCQC and Leaf Spy for 2011-12 models and if so the improvement achieved for which firmware update.

This is just a small design glitch in the 2011 and 2012 LEAF.

The DCQC % does not match what you see inside the LEAF. The LEAF indication at DCQC of 100% is usually only 11 of 12 status of charge bars. If you want that last little bit to get to 12 of 12 you have to use L2.
This is for 2011 and 2012. 2013 and 2014 act differently.

The 2011 and 2012 will charge to nominal 100% if the status of charge is above 50% when you start. Below 50% they will stop at 80%.
Once they stop at 80% you can restart and they will then go to 100%.

I'm not aware of any Lithium Battery Controller changes to fix this. Possible it could be done when they replace the battery.
But I don't think that is the case.
Maybe one of the lottery winners that have a new battery can confirm.

Tim Lee
Chattanooga, TN

Man. Date: 03/10/11, VIN # 2026
Delivered 05-17-2011
Blue Ocean, 2011 SL-eTec

dwl
Posts: 24
Joined: Tue Jan 05, 2016 5:06 pm
Delivery Date: 08 Jan 2016
Leaf Number: 112097
Location: New Zealand

Re: Mini-QC Rapid-Charger (RC) Project for LEAF QC Port

Sun Mar 27, 2016 12:37 pm

Thanks for the responses. I also posted in http://www.mynissanleaf.com/viewtopic.php?f=6&t=21682 as it seemed to be more visible and where this is some discussion.

The chargers here can be set to 80% or Max and that 80% setting works well on the 2013/14 so there must be some data point that works ok for that model.

Leaf Spy does use a different data point even on my 2014 as it diverges from the car dash display (but close at 80%) . It seems the data used by the charger on the earlier models is even more confused. :?
2014 S - 6000 km Jan 2016; 23000 km Sept 2016; 45000 km May 2017; 95% SOH

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JeremyW
Posts: 1514
Joined: Sun Nov 13, 2011 12:53 am
Delivery Date: 23 Jun 2012
Leaf Number: 19136
Location: San Gabriel, CA

Re: Mini-QC Rapid-Charger (RC) Project for LEAF QC Port

Sun Mar 27, 2016 6:54 pm

Tim Lee covered everything I would have said, except qc on the 2011-2012 is handled by a daughter card in the on board charger. It would be the firmware in that which would need updating. I doubt we will ever see a fix for this.
Former 2012 SL leasee 6/23/12 - 9/23/15
Now driving Honda Fit EV, License plate: CHADEMO
2000 Honda Insight for long trips

dwl
Posts: 24
Joined: Tue Jan 05, 2016 5:06 pm
Delivery Date: 08 Jan 2016
Leaf Number: 112097
Location: New Zealand

Re: Mini-QC Rapid-Charger (RC) Project for LEAF QC Port

Wed Mar 30, 2016 12:11 am

Many thanks for the feedback on the issue with the 2011/12 Leafs which has been shared with the owners here in New Zealand.
2014 S - 6000 km Jan 2016; 23000 km Sept 2016; 45000 km May 2017; 95% SOH

valerun
Gold Member
Posts: 240
Joined: Sun Mar 31, 2013 1:34 am
Delivery Date: 31 Mar 2013
Location: Palo Alto, CA
Contact: Website

Re: Mini-QC Rapid-Charger (RC) Project for LEAF QC Port

Sun Apr 10, 2016 10:13 pm

Hi All -

Just thought to post some updates on our CHAdeMO efforts from eMotorWerks.com.

Lots of progress since our last posts in 2014 (really busy 2015 with our JuiceBox enterprise didn't leave any time for CHAdeMO updates).

We now have ~20 units operating in various settings with our partners. Below is the latest achievement - a battery-backed 50kW CHAdeMO charger containing two charging units:
1. 12kW continuous recharge of the 24kWH+ battery pack from any AC or DC source (solar panels, another battery, 208VAC / 240 VAC / 480 VAC single-phase / 3-phase)
2. A separate power cell to dump-discharge the pack into any CHAdeMO-compatible car at 50kW.

Battery backup is key to eliminate demand charges and allow to provide various energy services from grid integration (similar to our JuiceBox level 2 strategy)

The whole thing is mounted on a 12x24" 0.5"-thick alum baseplate and cooled by 2 small cold plate (one under each charging unit).

Hopefully we will soon see a lot of these around ;-)

For more info, join our DC group at https://www.facebook.com/groups/eMWDC/.

Thx
V
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EMW - Creators of the Best-Selling 10-18kW JuiceBox EVSE: http://emotorwerks.com/, JuicePlug - a universal adapter to make any EVSE smart: https://goo.gl/dM29O7, and 12-50kW DC Charging systems: http://goo.gl/oOpBvq

valerun
Gold Member
Posts: 240
Joined: Sun Mar 31, 2013 1:34 am
Delivery Date: 31 Mar 2013
Location: Palo Alto, CA
Contact: Website

Re: Mini-QC Rapid-Charger (RC) Project for LEAF QC Port

Sun Apr 10, 2016 10:14 pm

somehow, still only 3 photos per post... ;))

Last one below - showing ~100A output.
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EMW - Creators of the Best-Selling 10-18kW JuiceBox EVSE: http://emotorwerks.com/, JuicePlug - a universal adapter to make any EVSE smart: https://goo.gl/dM29O7, and 12-50kW DC Charging systems: http://goo.gl/oOpBvq

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Marktm
Gold Member
Posts: 310
Joined: Thu Jan 21, 2016 10:49 am
Delivery Date: 09 Jan 2016
Leaf Number: 022737

Re: Mini-QC Rapid-Charger (RC) Project for LEAF QC Port

Mon Apr 11, 2016 12:28 pm

Quite amazing work - that seems so straight-forward, but definitely is not.

Do you believe it is possible to DC/QC an EV using a typical home based PV systems (say 5 to 10 KW) with minimal/no "battery backup". I realize its not actually "QC", but would seem to be much more efficient than using the Level II charge system - and for me with a 2012 Leaf, almost 3 times the charge rate (at 10Kw).

Could the DC/DC converter be designed for "opportunity charging" so that the EV's charge rate simply varies with the solar energy available? If MPPT function is added, it would become the first truly high voltage (battery) solar MPPT battery charger- at least from what I can find.
2012 Leaf SL; 34,000 miles. 12 bars - Battery replaced November 1st, 2016.
4000 watts Grid-tied solar. 3000 watts (level II) off-grid solar Leaf charging capable.

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JimSouCal
Posts: 854
Joined: Tue Feb 08, 2011 12:54 pm

Re: Mini-QC Rapid-Charger (RC) Project for LEAF QC Port

Thu Apr 28, 2016 8:07 am

valerun wrote:Hopefully we will soon see a lot of these around ;-)
It seems like you guys are undaunted and persevere... Watching from my armchair, very impressed... That said, I'd still install this in a utility space or room unattached to my house. Also, as others have mentioned, being able to market this as an energy management and back up solution would be (will be) amazing... Will keep watching for progress and a ready to market version... Thanks for the effort...!

nenik
Posts: 6
Joined: Tue Sep 27, 2016 10:07 pm
Delivery Date: 14 Sep 2016
Leaf Number: 001325

Re: Mini-QC Rapid-Charger (RC) Project for LEAF QC Port

Sat Oct 15, 2016 5:43 pm

Late question (for the record, I have read this thread in the entirety and many of the referenced materials):
Did anyone tried how would Leaf/QC respond to a pulsing input power? Let's say like if it was directly from a PFC stage and plenty of capacitors in between, so the charger output voltage, at rated power, would see up to 4V ripple (or the corresponding charging current ripple) at 120Hz.

The point is, the battery is the "biggest capacitor" and the most efficient isolated charging topologies would benefit from not having to bridge the mains power dips.
2011 Ocean Blue SL (since 9/2016, 16,600mi, totaled at 21,500mi)

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JimSouCal
Posts: 854
Joined: Tue Feb 08, 2011 12:54 pm

Re: Mini-QC Rapid-Charger (RC) Project for LEAF QC Port

Thu Nov 24, 2016 10:53 am

Any CHAdeMO updates at this time?

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