JoeS
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Location: Los Altos Hills, California

CHAdeMO Questions

Wed Feb 18, 2015 11:28 am

Just out of curiosity, has anyone experienced any issues when charging our i-MiEV using commercial Level 3 EVSEs here in the US? I haven't, and mine has worked flawlessly with both Blink and NRG eVgo.

This UK article brought this to mind: https://speakev.com/threads/unreliable-ecotricity-chademo-charging-with-i-miev-ion.1072/

Completely unrelated to this, does anyone know if there is a minimum dc current that needs to be provided via the CHAdeMO port for the i-MiEV to accept a charge, and is anyone aware of any differences in implementation of CHAdeMO between our i-MiEV and the Leaf?
EVs: 2 Wht/Blu SE Prem., '13 Tesla MS85, 3 156v CorbinSparrows (2 Li-ion), 24v EcoScoot(LiFePO4)
EV Conv: 156v '86 Ram PU, 144v '65 Saab 96
Hybrids: 48v1kW bike
ICE: '88 Isuzu Trooper. Mothballed: '67 Saab (orig.owner), '76 MBZ L206D RHD RV

PV1
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Re: CHAdeMO Questions

Wed Feb 18, 2015 1:09 pm

Theoretically, CHAdeMO simply needs the proper handshake between car and charger to engage the contactor.

The i-MiEV (at least in Japan) is able to discharge through the CHAdeMO port, running equipment such as V2G or the MiEV Power Box. Mitsubishi has a V2G system in place at their headquarters. It combines solar, grid, a few dedicated i-MiEV batteries, and 6 CHAdeMO plugs for the fleet to plug into. The cars serve as extra battery capacity for the building, but can also charge from the system. I'm not sure if the LEAF has the same capabilities software-wise, but I don't see why not. Nissan is doing the same experiments.

To answer your original question, I've only used QC once and had no issues. The main issue is whether or not the quick charger even works, and if it does, the cars seem to charge.
"Bear" - 2012 Diamond White Pearl ES with QC - 2/21/2013
Solar-powered since 10/10/2013

"Koorz" - 2012 Cool Silver Metallic ES with QC - 1/5/2015

2017 Bolt EV LT in Orange with QC - 7/31/2017

Driving electric since 2-21-2013.

pbui19
Posts: 137
Joined: Tue Jan 07, 2014 12:17 pm

Re: CHAdeMO Questions

Wed Feb 25, 2015 10:00 am

JoeS wrote:Just out of curiosity, has anyone experienced any issues when charging our i-MiEV using commercial Level 3 EVSEs here in the US? I haven't, and mine has worked flawlessly with both Blink and NRG eVgo.

This UK article brought this to mind: https://speakev.com/threads/unreliable-ecotricity-chademo-charging-with-i-miev-ion.1072/


Only used QC a few times, once as a test to see if it works, but didn't need charge. The 2nd time, I noticed that the rate was low but I think because the battery was "cold". It was a short 2 miles drive in the morning.

Yesterday, in warm SoCal, the QC started at ~30+kw at about 50% SOC, then tapered to ~10kw approaching 80%. The Miev stopped the charge at 81%, but restarted upon pressing the charger "Start" button, again at around 10kw. But I stopped at 83% SOC, didn't want to push it. The whole time duration was ~20 minutes, enough time to dust the car and shake out the carpet etc...

This was at a LAWater Utility building, it was free access.

jray3
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Location: Tacoma area, WA
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Re: CHAdeMO Questions

Wed Feb 25, 2015 10:26 am

I use CHAdeMO frequently, but have never been able to go much past 80% SOC in a single session, unlike the LEAFs that regularly camp out for a 100% charge on Blink DCFC stations. Given Joe's discovery, I'll take the time sometime soon to wait around and watch to see if the disconnect happens when amps fall to 5 or less.

Among the litany of Blink shortcomings, I have noticed that the second head is no longer reliable. They designed the stations to allow a second car to plug in and order up a charge that would commence as soon as the first car finishes. That has failed the last few times I've tried, meaning that I have to swipe my card and go through the touchscreen menu again.
2012 i-SE "MR BEAN" 76,000 miles
i-ES traded at 21,648 miles
2000 Honda Odyssey
1987 F250 Diesel
1983 Grumman Kurbwatt,170 kW, 32 kWh
1983 Mazda RX-7 EV 43 kW 10 kWh
1971 "Karmann Eclectric" EV 240 kW 19 kWh
1965 Karmann Ghia Cabriolet

JoeS
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Re: CHAdeMO Questions

Wed Feb 25, 2015 10:32 am

pbui19 wrote:Yesterday, in warm SoCal, the QC started at ~30+kw at about 50% SOC, then tapered to ~10kw approaching 80%. The Miev stopped the charge at 81%, but restarted upon pressing the charger "Start" button, again at around 10kw. But I stopped at 83% SOC, didn't want to push it. The whole time duration was ~20 minutes...
Using 360v*5A = 1800W is the end charge power level at which the car tells CHAdeMO to stop and won't allow charging below this. Guess we then have to switch over to J1772 to fully top up the car. Using my EVSEUpgraded Mitsu unit I've charged mine at 120v*6A = 720W all the way to 100%, and it continued charging/balancing as it tapered down after that until it shut off.

The CHAdeMO chargers I had used all stopped at exactly 80%SoC (told to me by both the CHAdeMO display and CaniOn). I thought that the charger itself was programmed to do that, and not the car.

In addition to the stopping at 83% that pbui19 saw, has anyone else seen a power level lower than 1800W or any higher SoC when using CHAdeMO?
EVs: 2 Wht/Blu SE Prem., '13 Tesla MS85, 3 156v CorbinSparrows (2 Li-ion), 24v EcoScoot(LiFePO4)
EV Conv: 156v '86 Ram PU, 144v '65 Saab 96
Hybrids: 48v1kW bike
ICE: '88 Isuzu Trooper. Mothballed: '67 Saab (orig.owner), '76 MBZ L206D RHD RV

PV1
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Location: Pittsburgh, PA
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Re: CHAdeMO Questions

Wed Feb 25, 2015 10:38 am

I replugged the charger after a stop at 82% and was able to reach 98.5% before it shut down. The lowest current reading I have a picture or video of is 10 amps, around 93%.

I heard Fuji quick chargers will go straight to full charge and not make the stop at 80%.
"Bear" - 2012 Diamond White Pearl ES with QC - 2/21/2013
Solar-powered since 10/10/2013

"Koorz" - 2012 Cool Silver Metallic ES with QC - 1/5/2015

2017 Bolt EV LT in Orange with QC - 7/31/2017

Driving electric since 2-21-2013.

tigger19687
Posts: 550
Joined: Tue Feb 10, 2015 1:19 pm
Location: Bedford/Concord MA

Re: CHAdeMO Questions

Wed Feb 25, 2015 11:26 am

PV1 wrote:I replugged the charger after a stop at 82% and was able to reach 98.5% before it shut down. The lowest current reading I have a picture or video of is 10 amps, around 93%.
.


Was that a free charger ?
Or did you have to pay again when you re-connected ?

Just curious as the QC chargers here mostly are pay (that I would use to go to Cape Cod) at the Nissan dealers.
[size=85]- Linda
-2017 Chevy Bolt Premier Bright Blue
- 2014 Toyota Prius C, for the Son

PV1
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Re: CHAdeMO Questions

Wed Feb 25, 2015 12:05 pm

It was a free charger. You probably would have to pay for another session to get the last 20% since (at least on Eaton units) it was a complete unplug, replug, and start a new charge session. If you are paying for time instead of per kWh or per session, that last 20% is more expensive than the first 80%.
"Bear" - 2012 Diamond White Pearl ES with QC - 2/21/2013
Solar-powered since 10/10/2013

"Koorz" - 2012 Cool Silver Metallic ES with QC - 1/5/2015

2017 Bolt EV LT in Orange with QC - 7/31/2017

Driving electric since 2-21-2013.

pbui19
Posts: 137
Joined: Tue Jan 07, 2014 12:17 pm

Re: CHAdeMO Questions

Wed Feb 25, 2015 7:56 pm

JoeS wrote:
In addition to the stopping at 83% that pbui19 saw, has anyone else seen a power level lower than 1800W or any higher SoC when using CHAdeMO?


I didn't unplug, just push the start button again, because i recall reading on this forum about restarting so I thought to try it. It looks like it would have continue to charge beyond 83%, it was still drawing ~30A @3xx vdc, don't recall exact number.

I pushed "stop" to end the charging. I didn't hesitate to experiment especially with a free access. :)

1pk
Posts: 25
Joined: Thu Jul 10, 2014 7:34 am
Location: Chemainus, BC

Re: CHAdeMO Questions

Wed Feb 25, 2015 8:49 pm

My car stops charging at 82% every time. Both of the ones I use are operated by Greenlots.

Pete

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