webeleafowners
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Location: Okanagan Valley British Columbia

Re: Chademo adapter performance on a Tesla model AWD with 50 KW BC Hydro Chademo station.

Mon May 04, 2020 12:47 pm

I would give kudos to BC Hydro in the sense that there are over 5 times as many DCFC sites now as there was 5 years ago and a lot of the coordination of the different providers was BC Hydro. Even the North route to Prince Rupert will be done by mid summer. Kinda cool.
2020 Model 3 Tesla. AWD with FSD. Deep metallic blue. Our daily driver.
2016 Nissan Leaf SV 30KWh Culis Red. Sold. Was my daily driver. Loved that car.
EV only Family...well except for the big diesel motorhome. :shock:

alozzy
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Delivery Date: 18 Jan 2017
Location: Vancouver, BC
Contact: Website

Re: Chademo adapter performance on a Tesla model AWD with 50 KW BC Hydro Chademo station.

Mon May 04, 2020 8:29 pm

Fair enough, I'm guessing the reliability issues and related changes of vendor equipment have been more of a problem in Vancouver. There have been times when DCFC machines have been down for weeks, then finally repaired, then quickly thereafter to fail again. Reliability has definitely improved over the last year.
Vancouver, CA owner of a 2013 Ocean Blue SV + QC, purchased 01/2017 in WA
Zencar 12/20/24/30A L1/L2 portable EVSE
1-1/4" Curt #11396 hitch
After market, DIY LED DRLs
LeafSpy Pro + Konnwei KW902 ELM327 BT OBDII dongle
Loving my first BEV :D

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JeremyW
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Delivery Date: 23 Jun 2012
Leaf Number: 19136
Location: San Gabriel, CA

Re: Chademo adapter performance on a Tesla model AWD with 50 KW BC Hydro Chademo station.

Mon May 04, 2020 9:43 pm

cwerdna wrote:
Sun May 03, 2020 6:45 pm
Have a Plugshare link to the charger? What's the amperage on the charger? The power level might've been going up due to the voltage rising.

Some "50 kW" chargers are only 100 amps at stupid voltages like 500 volts (100 amps * 500 volts = 50,000 watts). At say, 370 volts, you'd only hit 37 kW at max if the 100 amps is the bottleneck (100 amps * 370 volts = 37,000 watts).

This is why I avoid the two EVgo dual-standard DC FCs that are sorta near me. EVgo is expensive (see California: Bay Area pricing at https://www.evgo.com/charging-plans/) and I wouldn't hit much more than 37 kW on my Bolt with them. Electrify America opened up a site recently w/MUCH higher powered DC FCs so my Bolt could hit 55 kW on those and with Pass+ membership, they only charge 18 cents/minute.
The unit he's charging on is a 50 kW ABB unit which (when working properly) will give full 125A on CHAdeMO or CCS.

You should try out those EVgo stations again. Nearly all sites that were 100A have been corrected to 120A or 125A. ;)

The sudden jump to 48 kW is the pack reaching temp and allowing full charging speed. The voltage rise during a charge is much more gradual (except at very low SOC). The model 3 appears to run the pack heater quite aggressively during charging, according to those who sniff the CAN bus...
Former 2012 SL leasee 6/23/12 - 9/23/15
Former Fit EV leasee.
Now driving Spark EV and Model 3.

cwerdna
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Location: SF Bay Area, CA

Re: Chademo adapter performance on a Tesla model AWD with 50 KW BC Hydro Chademo station.

Mon May 04, 2020 10:26 pm

^^^
Thanks for all the insight!
JeremyW wrote:
Mon May 04, 2020 9:43 pm
You should try out those EVgo stations again. Nearly all sites that were 100A have been corrected to 120A or 125A. ;)
I may check them out again. I'll PM you about the sites if I find out otherwise.

If they are 120+ amp capable, the labeling on them would've changed to reflect that, right?

'19 Bolt Premier
'13 Leaf SV w/premium package (owned)
'13 Leaf SV w/QC + LED & premium packages (lease over, car returned)

Please don't PM me with Leaf questions. Just post in the topic that seems most appropriate.

DaveinOlyWA
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Leaf Number: 319862
Location: Olympia, WA
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Re: Chademo adapter performance on a Tesla model AWD with 50 KW BC Hydro Chademo station.

Tue May 05, 2020 9:55 am

This illustrates what I see as the main difference between the LEAF and well...everyone else.

The LEAF would have immediately charged at full rate right away even if the pack was cold. Obviously this makes for a more efficient use of time but what kind of impact is this doing to the battery?

Tesla (along with nearly everyone else who has TMS most notably Chevy) wants to heat up the pack first then allow full speed charging which will either heat up the pack faster or force cooling which seems a bit...wasteful.

So is the main source of degradation heat or high charge at lower temps? Could this be the reason the newer chemistry from Nissan doesn't exhibit the climatic effects of the older packs? (which charged the same way BTW)
2011 SL; 44,598 mi, 87% SOH. 2013 S; 44,840 mi, 91% SOH. 2016 S30; 29,413 mi, 99% SOH. 2018 S; 25,185 mi, SOH 92.23%. 2019 S Plus; 10,081 mi, 95.03% SOH
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arnis
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Leaf Number: 015896
Location: Estonia, Europe

Re: Chademo adapter performance on a Tesla model AWD with 50 KW BC Hydro Chademo station.

Tue Jun 23, 2020 1:03 pm

99% of Chademo plugs are UP TO 125 Amps. And up to 500V.
Often even less due to grid limitations.
Tesla pack is way below 400V when at 50%.
So if voltage is 350V, multiplied with 125A = 43,75kW.
Voltage rises and rises until it reaches 400-402V and then current
rapidly drops as maximum voltage has been reached.
As 50kW is not enough for massive packs...voltage will not spike even when DC-charging.


24kWh Leaf acts similarly. It reaches (depending on battery temperature) maximum voltage at around 50%.
Up to that point, it can pull full 125A. After that, voltage is limited to around 396V and current drops.
Look at those screenshots.
ImageImage

So it literally goes from 10% to 50% in 10 minutes, after that, things... calm down a lot :lol:
Short range EVs <30kWh -- Medium range: 30-60kWh -- Long range: >60kWh
Charging: Trickle <3kW -- Normal 3-22kW -- Fast 50-100kW -- Supercharging >100kW

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