nuggetgalore
Posts: 18
Joined: Sun Apr 12, 2020 12:46 am

Re: 12 kW chademo charging

kiev wrote:
nuggetgalore wrote:...
Re the P1A14 , so what would happen if I connected the QC relay with jumpers and added a switched 12 V into pos 1. Obviously without the 12 V into pos 1 the car would see nothing different until pin 10 is to ground in the chademo port. But would there be a problem when the QC contactors close but the QC relay is not on?
The other option would be to get a relay to take pos 4 to ground, that closes the QC relay and have a relay that connects pin 3 with pin 10.
What is it that you are trying to do--i don't understand this mess, it doesn't make any sense to me. For all we know the Orange wire gets powered from the EV-ECU similar to how the EV Control Relay is powered. Your car has modifications from the FSM with an unknown additional black box...?
Sorry for the mess.
What I have achieved so far is to close the QC contactors with the QC relay disconnected, charge normally and drive the car. But disconnecting the relay causes the HV warning light to come on and sets DTC P1A14 (CODE No. P1A14 QUICK CHARGE CONTACTOR CIRCUIT LOW).
I am contemplating to experimentally connect a second pack via the chademo port to get an idea of how that pack behaves under load. For this I would like to have the HV warning light off and possibly see if and when another error is created.
My question is what problems could I run into if I have the QC relay connected (the HV warning light off) and at the same time (artificially) close the QC contactors, I don't see a problem but I'm not confident.
Anyway, that experiment is several weeks away as I have to wait for the covid 19 restriction to end before continuing the pack assembly.
kiev
Posts: 1778
Joined: Sun May 03, 2015 7:15 am
Location: The Heart o' Dixie
Contact: Website

Burning Leaves

The DCQC relay bypass trick was only intended to allow access to the HV of a stationary pack, such as for an emergency backup power supply for home, or for diy DC charging without using the CHAdeMO protocol.

Normally the car won't go to READY with the DCQC contactors energized, but i think maybe a couple of guys on here have tried to do something like what you are talking about. i've seen the videos of at least 3 laef guys who tried adding a 2nd pack, 2 totally burned, and 1 totally bricked.

https://youtu.be/2cIo95W-vfE

https://youtu.be/8PUG-ldjD48

https://www.youtube.com/watch?v=6Zivzvh9Bx0
kiev = kenny's innovative electric vehicle
nuggetgalore
Posts: 18
Joined: Sun Apr 12, 2020 12:46 am

Re: Burning Leaves

kiev wrote:The DCQC relay bypass trick was only intended to allow access to the HV of a stationary pack, such as for an emergency backup power supply for home, or for diy DC charging without using the CHAdeMO protocol.

Normally the car won't go to READY with the DCQC contactors energized, but i think maybe a couple of guys on here have tried to do something like what you are talking about. i've seen the videos of at least 3 laef guys who tried adding a 2nd pack, 2 totally burned, and 1 totally bricked.
Thanks for reminding me to be extremely careful and conscious of the dangers of high voltage and high power. As I posted in the AEVA aftermarket battery upgrade thread, my intentions were to test the 60AH cell pack with the car blocked up, not on the road. But maybe that is not a good idea either.
bennelson
Posts: 143
Joined: Thu Jan 31, 2013 1:01 pm
Contact: Website

Re: 12 kW chademo charging

Hey Folks!

I've been working on a CHAdeMO project to draw power out through the CHAdeMO port, take it through an inverter, and convert it to 120/240VAC 60 Hz for emergency home backup power.

I had a friend 3D print for me the physical components you can find at: https://www.thingiverse.com/thing:121581

I then used some brass components to make signal pins, and some 9 mm copper rod to make the main power pins.

I got some 600V-rated SOOW jacketed cable with (3) 12 AWG conductors. I built a 500VDC fuse directly inside the CHAdeMO handle.

I used some networking cable to connect up the signal pins, and terminated the opposite ends of those wires to ground, or whatever else their appropriate use would be. For Pin 10 on the CHAdeMO, I ran that through a switch and then to ground. That gives me a manual control over activating that pin.

In the back of the car, under the seat, I've jumpered pins 1 & 2 together as has been talked about earlier in this thread.

If I plug the 3D printed CHAdeMO handle into the car, turn the car on (activates power at the QC relay) and turn on the switch for CHAdeMO pin 10 (grounds it) then I get my 360VDC at the output of the cable.

Next, I have to get the hybrid solar inverter (in the mail right now) and a few other things going, such as a precharge circuit to the inverter.

Here's a quick video showing some of what I've done so far.
https://youtu.be/Cw-SMRmZjNI

I also plan to seal/coat the 3D printed parts, so there's no concern about it being too fragile, or water getting in there, etc. I've heard good things about UV activated resins, and am thinking about getting something like this to brush on the outside. https://amzn.to/3qbGzb8
I can also seal the seam with 100% silicone caulk. I'll probably finish covering any exposed conductor inside the handle with Kapton tape.
kiev
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Location: The Heart o' Dixie
Contact: Website

Re: 12 kW chademo charging

Wow, great job Ben. i really like how you Nickel plated the pin, that was awesome.

How long do you figure you can run the V2H from Full to the Empty?
kiev = kenny's innovative electric vehicle
bennelson
Posts: 143
Joined: Thu Jan 31, 2013 1:01 pm
Contact: Website

Re: 12 kW chademo charging

Runtime would be dependent on the car's battery pack capacity and the AC load put on it by the house.

My car has never had a great battery. I only get about 40 miles on it nowadays.

I imagine using this as an emergency backup. As such, I would try to minimize how much power was drawn out of the pack. I'd have it just run my fridge/freezer, a light or two, charge some phones, furnace blower fan in the winter - just the basics.

My solar array uses grid-tie micro-inverters. Those do NOT run in a grid-down situation, but I think that I could kick them on using a hybrid inverter.

I just got a SolarCity H6 inverter in the mail the other day. The battery input on it uses high voltage, but it's a little HIGHER than what the iMiEV pack puts out. I think I can run the battery in to the solar input by adding a fuse and pre-charge circuit.

https://www.youtube.com/watch?v=mFLXikXjxY4
bennelson
Posts: 143
Joined: Thu Jan 31, 2013 1:01 pm
Contact: Website

Re: 12 kW chademo charging

Here's what I did for hacking the High Voltage relay.
Link to video: https://www.youtube.com/watch?v=hBV9CIVN0fs
Last edited by bennelson on Sat Nov 13, 2021 9:52 am, edited 1 time in total.
jray3
Posts: 1752
Joined: Tue Dec 06, 2011 1:05 am
Location: Tacoma area, WA
Contact: Website

Re: 12 kW chademo charging

Bravo, Ben!
Siai47 started us down this path years ago, but a video is worth a million words.
Why are you setting it up for ignition-on operation only?
Since the ignition key must be off to commence a DCFC, I expect that the BMS will be energized whenever the relay is closed, and that the main thing you'll be missing out on is interpreting the BMS output to shut it down in the EVent of over-discharge or overcharge- should the same handle be used for solar charging or DIY DCFC using an offboard charger such as the Manzanita Micro PFC-50.

I have a CHAdeMO handle-in-waiting, and hope to replicate your efforts, once proven.
I'm just interested in having the contactor switch on the CHAdeMO handle using the original activation pins.
Keep up the good work.
-Jay
2012 i-SE "MR BEAN" 128,000 mi, 34 ah
2016 KIA SOUL EV, 76k miles
2000 Mazda Miata EV, 78 kW, 17 kWh
1983 Grumman Kurbwatt EV,170 kW
1983 Mazda RX-7 EV 43 kW 27 kWh
1971 "Karmann Eclectric" EV 240 kW 19 kWh
bennelson
Posts: 143
Joined: Thu Jan 31, 2013 1:01 pm
Contact: Website

Re: 12 kW chademo charging

I guess the main thing is that just going straight analog lets me get going in the project and then test the solar inverter part of it.
How and which solar inverters can handle the 360VDC on the PV input is the big question that I really haven't seen others tackle yet.

There's no reason why I can't still use CAN with the CHAdeMO protocols, but I need to learn some more about communications, purchase a micro-controller with CAN connections, and find out what the actual commands would be.

Most of the info I've been able to find about DIY CHAdeMO is on the car side - such as adding a CHAdeMO input to a DIY electric vehicle.
pbui19
Posts: 198
Joined: Tue Jan 07, 2014 12:17 pm

Re: 12 kW chademo charging

bennelson wrote: I just got a SolarCity H6 inverter in the mail the other day. The battery input on it uses high voltage, but it's a little HIGHER than what the iMiEV pack puts out. I think I can run the battery in to the solar input by adding a fuse and pre-charge circuit.
Ben - i don't think you can do that, connecting the battery to the PV input. PVs are inherent a current source and battery has infinite current, it's going to blow.

But this is the first inverter i've seen with such a high battery voltage spec. What is the iMiev pack voltage again ? haven't look at Canion nor the other one for over a year.

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