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garygid
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Leaf Number: 000855
Location: Laguna Hills, Orange Co, CA

Re: Mini-DC charger Project for QC Port

Thu Jul 25, 2013 7:25 am

Before connection to the battery, we need to be able to
control the power supply Output voltage, and then measure
the (essentially no) current out as a safety check

When finally connected to the car's battery, we need to
be able to change the Output current in response to the
Robomo controller's interpretation of the car's request
for current, which can ramp by 2 amps each 0.1 seconds.

Just getting power is not difficult. Making it sufficiently
clean, efficient, and controllable is the real problem.
See SOC/GID-Meter and CAN-Do Info
2010 Prius, now for sale
2011 LEAF, sold in 2015
2018 Tesla Model 3
2014 Tesla S, Model 3 in 2019
PU: SDG&E
Solar PV: 33 x 225W -> 7 kW max AC
To Sell: X-treme 5000Li EV motorcycle

JasonA
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Location: Sylmar, CA

Re: Mini-DC charger Project for QC Port

Thu Jul 25, 2013 9:17 am

I can control them.. to a point but I've never done a bank of them before.. maybe something I'll tinker with since I have a ton of them.

But I know a PS guy at AeroVironment that might be able to help ;)

HV is kinda cool!.. :D
2012 10kw Dual LQ cooled Brusa powered Leaf "Astro"
13kw Enphase System,SolarWorld Panels, QuickMountPV- ALL USA!!
2014 Rav4 "SuperRav"with JdeMO (CHAdeMO)
2015 MS-70D

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garygid
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Re: Mini-DC charger Project for QC Port

Thu Jul 25, 2013 10:01 pm

AeroVironment makes or sells QC stations, so is likely to be a Chademo
licensee, so we will have to pass on any help from somebody
associated with them. But, thanks.

Also, HV can kill, so please do not experiment unless you are
sufficiently skilled to do the work safely.
See SOC/GID-Meter and CAN-Do Info
2010 Prius, now for sale
2011 LEAF, sold in 2015
2018 Tesla Model 3
2014 Tesla S, Model 3 in 2019
PU: SDG&E
Solar PV: 33 x 225W -> 7 kW max AC
To Sell: X-treme 5000Li EV motorcycle

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TonyWilliams
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Contact: Website

Re: Mini-DC charger Project for QC Port

Thu Jul 25, 2013 10:16 pm

garygid wrote:AeroVironment makes or sells QC stations, so is likely to be a Chademo
licensee, so we will have to pass on any help from somebody
associated with them. But, thanks.

Also, HV can kill, so please do not experiment unless you are
sufficiently skilled to do the work safely.
Why the censorship on info? I don't see that as safe. The actual cost to get this officially and legally isn't insurmountable. Is that the issue? If so, lets find a way to get you funded.

If its some other reason, please give us a hint.

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garygid
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Re: Mini-DC charger Project for QC Port

Thu Jul 25, 2013 10:23 pm

A milestone:
Last night the first full Robomo charge was completed,
at about 28 amps DC, apparently without upsetting the car.

Using 240 volts from a standard home 50-amp breaker,
the charging used the LEAF's QC port, and completed the
charge in two sessions, the first stopped by the car at the
"80%" point, and the second stopped by the car at "full".

There is lots of work remaining, but the basic handshaking
and communication seems to be working well enough
to initiate, charge, taper off, and terminate "gracefully".

Controlling the Power Supply still needs refining.

At this 10 kW level, the power is non-trivial, but
it is hoped to be able to at least double that.

Cheers indeed, Gary :D
See SOC/GID-Meter and CAN-Do Info
2010 Prius, now for sale
2011 LEAF, sold in 2015
2018 Tesla Model 3
2014 Tesla S, Model 3 in 2019
PU: SDG&E
Solar PV: 33 x 225W -> 7 kW max AC
To Sell: X-treme 5000Li EV motorcycle

tbleakne
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Leaf Number: 2400
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Re: Mini-DC charger Project for QC Port

Thu Jul 25, 2013 10:28 pm

garygid wrote:A milestone:
Last night the first full Robomo charge was completed,
at about 28 amps DC, apparently without upsetting the car.
Congratulations. Very impressive work on many levels.
LEAF Ocean Blue SL, "100 % Electric" decals, Delivered June 3, 2011
Sold June 2014 27K miles, 18% capacity loss, 1 bar, 5.0 mi/kWh.
Solar 4.6 KW DC with both string and micro-inverters.

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garygid
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Re: Mini-DC charger Project for QC Port

Thu Jul 25, 2013 10:39 pm

The cost for the "available" Chademo document is not
the issue. If you start the process of buying it, you will
discover that you have to agree to many constraints.

The Robomo Project is not interested in being constrained.
Also, it is not clear that there is any necessary information
contained in the document that we need to make progress.

The major remaining effort is in designing a suitable isolated
power supply, and it is unlikely that such matters are discussed
or resolved in the document that is offered.

So, likely little benefit, and for certain substantial encumbrances.

The goal of the Robomo Project is to discover the necessary
information, and remain completely un-constrained.
See SOC/GID-Meter and CAN-Do Info
2010 Prius, now for sale
2011 LEAF, sold in 2015
2018 Tesla Model 3
2014 Tesla S, Model 3 in 2019
PU: SDG&E
Solar PV: 33 x 225W -> 7 kW max AC
To Sell: X-treme 5000Li EV motorcycle

JasonA
Posts: 584
Joined: Thu May 09, 2013 10:16 am
Delivery Date: 04 May 2013
Location: Sylmar, CA

Re: Mini-DC charger Project for QC Port

Fri Jul 26, 2013 6:16 am

garygid wrote:AeroVironment makes or sells QC stations, so is likely to be a Chademo
licensee, so we will have to pass on any help from somebody
associated with them. But, thanks.

Also, HV can kill, so please do not experiment unless you are
sufficiently skilled to do the work safely.
That's not where I was going.. AVinc also is the world's largest when it comes to UAV's (drones), solar and power technology, etc,etc.. And that's something that I do with them on the side.

So me asking a few people there has nothing to do with the vehicle propulsion group. Its a few "buddies" in the UAV dept that know HV ;)

As for me around HV, I guess you didn't see my latest project. I'm comfortable around it. I work on HV alot, even liquid immersion cooled units (hence what I said to evdriver..

Again, only trying to pull resources together. These AVinc engineer guys at the end of the day are just tinkerers and reverse engineers like all of us.

Jason
2012 10kw Dual LQ cooled Brusa powered Leaf "Astro"
13kw Enphase System,SolarWorld Panels, QuickMountPV- ALL USA!!
2014 Rav4 "SuperRav"with JdeMO (CHAdeMO)
2015 MS-70D

jclemens
Posts: 168
Joined: Mon Sep 05, 2011 7:37 am
Delivery Date: 02 Nov 2011
Leaf Number: 003748
Location: Mississauga
Contact: Website

Re: Mini-DC charger Project for QC Port

Fri Jul 26, 2013 6:33 am

garygid wrote:A milestone:
Last night the first full Robomo charge was completed,
at about 28 amps DC, apparently without upsetting the car.
Excellent, should we start a repository for files on this project? github?
I'd like to start with the robomo canbus communication protocol as pulled from the leaf's canbus, only if Mr. Robomo feels its ready of course.
I can then add my 3d files for the connector and specs for the pins, though they will be paralleled on the thingiverse.

To get more collaboration, we need motivation, to get that, we have to have something to work with. A canbus guide and photos of it working is great motivation!

the next version might be tough because we might start from scratch instead of using existing designs.
I have an idea in my head for a machine that winds litz wire, with 3d printed parts of couse ;-)
I was thinking of a small version of this:
Image

But this is where we need someone who has knowledge of HV and switching power supply transformer design. (RF power transformer ~ 20khz?)
If you can answer these questions, we need your help!

how thick do the strands need to be? (calculate skin effect?)
how many strands do we need? (total power without over heating)
what is the total length to wind the RF power transformer? (how many windings on the transformer?)
Interested in a j1772 dummy inlet to hang your EVSE when not charging?
PM me for details. or see http://erroneus.myevblog.com/buy-plastic-parts-here/

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hill
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Delivery Date: 27 Mar 2011
Leaf Number: 0659
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Re: Mini-DC charger Project for QC Port

Fri Jul 26, 2013 7:40 am

garygid wrote:A milestone:
Last night the first full Robomo charge was completed,
at about 28 amps DC, apparently without upsetting the car.

Using 240 volts from a standard home 50-amp breaker,
the charging used the LEAF's QC port, and completed the
charge in two sessions, the first stopped by the car at the
"80%" point, and the second stopped by the car at "full". ......snip......
Why am I suddenly finding a smirk on my face? Can it be due to the perfectly good yet unused circuit & 50-amp breaker in our main service panel?

8-)

.

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