Single phase CHADEMO at reduced charge rate. Possible???

My Nissan Leaf Forum

Help Support My Nissan Leaf Forum:

This site may earn a commission from merchant affiliate links, including eBay, Amazon, and others.

webeleafowners

Well-known member
Joined
Oct 5, 2015
Messages
1,306
Location
Okanagan Valley British Columbia
So not an engineer here but curious as to why this kind of a CHADEMO charger hasn't been developed. I would think there would be some market. A home based single phase unit that could provide a 15 KW DC charge etc. Curious if people think there would ever be a market. Those with cars with 60 or greater KWH batteries might find them handy.

Discussion ???
 
It exists:

https://www.evseadapters.com/products/portable-chademo-quick-charger

Edit: I don't know why my links are being modified... I've posted two different direct links to the product, but they show up here as some random string that takes you to their main page.
 
Hey that's kinda cool. But I'm not sure what I'm seeing. It mentions max 40 amp output max. So at 240 volts that is about 10 KW. Not a huge jump from the internal 6.6. It would be cooler if it was 70 amp unit at 15 KW. But still kinda cool.
 
In Japan, they have quite a range of CHAdeMO charger rates.
https://teslamotorsclub.com/tmc/threads/chademo-make-model-review-%E2%80%94-using-with-a-tesla.42176/page-8#post-961564
https://teslamotorsclub.com/tmc/threads/chademo-make-model-review-%E2%80%94-using-with-a-tesla.42176/page-8#post-971287

I also pointed to https://teslamotorsclub.com/tmc/threads/chademo-make-model-review-%E2%80%94-using-with-a-tesla.42176/page-9#post-972951 in another thread here.
 
webeleafowners said:
Hey that's kinda cool. But I'm not sure what I'm seeing. It mentions max 40 amp output max. So at 240 volts that is about 10 KW. Not a huge jump from the internal 6.6. It would be cooler if it was 70 amp unit at 15 KW. But still kinda cool.
This seems to be the same Chinese charger unit that created some discussion a while back... The idea of pulling power from high AMP EVSE stations is new to me... Owning an older LEAF with L3 makes this tempting... If I had 2 LEAFS, more so, or a delivery fleet, especially...
 
I believe this is the supplier of the actual charger/controller (maybe rebranded and/or simply added different cabling options):
http://www.setec-power.com/prlist/278603-3.html.

Setec also makes a stand-alone 50KW solar/off-grid charger/controller - things are starting to get interesting!

As I understand anyone with a 2014 and later Leaf can also use CHAdeMO connection in bi-directional current flow - any information on that?

webeleafowners said:
Hey that's kinda cool. But I'm not sure what I'm seeing. It mentions max 40 amp output max. So at 240 volts that is about 10 KW. Not a huge jump from the internal 6.6. It would be cooler if it was 70 amp unit at 15 KW. But still kinda cool.

The Setec unit is limited to 30 amps at single phase AC input. That would be ~ 7000 watts with typical 240 VAC split phase in US (would be interesting to see how they handle split phase inputs - 120 VAC to neutral?). With CHAdeMO, it is direct DC charging the Leaf's battery at ~400 VDC for a much higher efficiency of charge than level II. For us with the 3.3KW charger, it will allow charging a couple of times faster - but at a price as usual! If you can find a 380 VAC input you can get the full 10KW.
 
wmcbrine said:
It exists:

https://www.evseadapters.com/products/portable-chademo-quick-charger

Edit: I don't know why my links are being modified... I've posted two different direct links to the product, but they show up here as some random string that takes you to their main page.
You are being bit by the forum "feature" that adds referral codes to links posted. In this case, it screws the whole link. And worse, it does it at display time.

You need to turn off "auto parse URLs" when posting and then use font size changes to prevent the stupid forum code from ruining the display of the URL:
Code:
https://www.[size=3]evs[/size]eadapters.com/products/portable-chademo-quick-c[size=3]harger[/size]
https://www.evseadapters.com/products/portable-chademo-quick-charger
 
Most ChaDeMo chargers need 3 phase power because it's 477V AC, so it can easily be stepped down slightly and rectified to the 365V-385V DCrequired for a EV battery. 220V AC rectified to DC is only about 250V DC, way too low to charge a EV battery.
 
The portable CHAdeMO is great for those of us with the 3.3KW onboard charger. Bypassing it and use the CHAdeMO connection with this portable unit, it takes little more than a third the time! I've had one for two years, and it's still going strong. It's true that the large CHAdeMO stations use three phase power, but this portable one operates on single phase. I plug it right in at campground outlets, and I use a J1772 adapter at charging stations to double the speed, pulling 6.6KW even though my car's onboard charger is limited to 3.3.
 
johnr said:
I use a J1772 adapter at charging stations to double the speed, pulling 6.6KW even though my car's onboard charger is limited to 3.3.

I've been looking at the Setec Power unit - do you think they are the manufacturer of your unit? They do look similar.
http://www.setec-power.com/product/278603-3069417.html



How do you use the J-1772 "adapter" to bypass the onboard charger?
 
wmcbrine said:
Marktm said:
How do you use the J-1772 "adapter" to bypass the onboard charger?
EVSE -> adapter -> portable charger -> CHAdeMO -> car

Thanks - the actual adapter:

https://www.evseadapters.com/collections/ev-chargers-and-evses/products/j1772-to-14-50-adapter

I'd guess this is a clever use of the J-1772 protocols to allow the quick charger to actually generate the PWM signal equivalent to the max amperes (at 240 VAC split phase) that the DC quick charger can handle)?
Can someone with such expertise confirm this?
 
Marktm said:
wmcbrine said:
Marktm said:
How do you use the J-1772 "adapter" to bypass the onboard charger?
EVSE -> adapter -> portable charger -> CHAdeMO -> car

Thanks - the actual adapter:

https://www.evseadapters.com/collections/ev-chargers-and-evses/products/j1772-to-14-50-adapter

I'd guess this is a clever use of the J-1772 protocols to allow the quick charger to actually generate the PWM signal equivalent to the max amperes (at 240 VAC split phase) that the DC quick charger can handle)?
Can someone with such expertise confirm this?

No, it's not that clever. They are putting a resistor on the pilot signal to make the J1772 EVSE think it's plugged into a car. The EVSE is on with the safety protocols defeated.
 
TonyWilliams said:
Marktm said:
wmcbrine said:
EVSE -> adapter -> portable charger -> CHAdeMO -> car

Thanks - the actual adapter:

https://www.evseadapters.com/collections/ev-chargers-and-evses/products/j1772-to-14-50-adapter

I'd guess this is a clever use of the J-1772 protocols to allow the quick charger to actually generate the PWM signal equivalent to the max amperes (at 240 VAC split phase) that the DC quick charger can handle)?
Can someone with such expertise confirm this?

No, it's not that clever. They are putting a resistor on the pilot signal to make the J1772 EVSE think it's plugged into a car. The EVSE is on with the safety protocols defeated.

Tony - does this mean that the ampacity of the EVSE/cabling itself is communicated properly to the QC so that if the QC was sized above the EVSE's capacity It would still limit charge power for safe EVSE operation?
 
Back
Top