Canadian Kona charging at up to 93kw

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Also, in the video the high charge rate it after it ramps up over time. He starts charging at 20% but reaches that at about 60% or so. The battery would have been very warm already. Actually it definitely would need cooling at that point.
 
Esprit1st said:
Also, in the video the high charge rate it after it ramps up over time. He starts charging at 20% but reaches that at about 60% or so. The battery would have been very warm already. Actually it definitely would need cooling at that point.
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I have never seen the charge rate increase when battery cooling kicks in.. I just see a 2kw difference between the number on the dash and the energy flowing into the battery..
 
On a vehicle that reports to the the unit it's plugged into it 80kwh max, this is quite hard to swallow.
 
just to note, I have never seen over 72.5kw charge rate on my Kona.. but it may be due to high battery temp here in Florida..
 
BlueKonaEV said:
I was just made aware of a Kona owner who reported up to 93kw charging speed. There is a thread on Reddit..

https://www.reddit.com/r/KonaEV/comments/kueqej/94kw_charging_speeds_someone_asked_for_a_video/

Some suggested that the additional juice is for the battery warmer and not actually for the battery.. Very interesting..
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The resistance PTC cabin heater is only rated to 5kw and if available the battery heater is only 2 or 3 kw and if you turned on every other 12V accessory you would be lucky to hit 1 kw. So the energy accounting would still fall short. If those number are for real in the video I suspect there is something wrong with that fellows onboard charger.
 
If it's really that fast why does it take so long (70 min) to get from 10 to 80% in a 64 kWh battery?
The average would be around 38 kW...
 
apu said:
The resistance PTC cabin heater is only rated to 5kw and if available the battery heater is only 2 or 3 kw and if you turned on every other 12V accessory you would be lucky to hit 1 kw. So the energy accounting would still fall short. If those number are for real in the video I suspect there is something wrong with that fellows onboard charger.
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The onboard charger is not used for DC charging..
It's an issue with the BMS if it allows too fast DC charging.
 
apu said:
The resistance PTC cabin heater is only rated to 5kw and if available the battery heater is only 2 or 3 kw and if you turned on every other 12V accessory you would be lucky to hit 1 kw. So the energy accounting would still fall short. If those number are for real in the video I suspect there is something wrong with that fellows onboard charger.
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OBC should not have a bearing using DC charging, nor should the being in sports mode. I picked up on this yesterday, and I do agree the energy accounting does not equal the differential rate (charging losses, battery heater and cabin PTC @ full included). I suspect an issue with the BMS not communicating with the DC Charger (was done with a Petro Canada machine - likely a 350 kW unit limited to 200 kW) . Also curious what maximum cell voltages were during the 94 kW peak.
https://insideevsforum.com/community/index.php?threads/post-recall-charging-curve.10101/#post-119492
I also agree with KiwiME on the reply post
 
electriceddy said:
OBC should not have a bearing using DC charging, nor should the being in sports mode. I picked up on this yesterday, and I do agree the energy accounting does not equal the differential rate (charging losses, battery heater and cabin PTC @ full included). I suspect an issue with the BMS not communicating with the DC Charger (was done with a Petro Canada machine - likely a 350 kW unit limited to 200 kW) . Also curious what maximum cell voltages were during the 94 kW peak.
https://insideevsforum.com/community/index.php?threads/post-recall-charging-curve.10101/#post-119492
I also agree with KiwiME on the reply post
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Maybe something got corrupted when they did the update on that Kona. I don't see evidence of the car not communicating with the charger. The rate was constantly changing and it is the BMS telling the charger how much charge to send.. The charge level increased as it usually does until the drop points.. This tells me that there was communication between charger and car. I think that somehow, some variables got accidentally updated maybe during the latest recall, causing the BMS to demand more energy but it could just be an issue with the energy displayed.. Would be interesting to see if the charger showed the same high number..
 
In the initial post the owner said that "both the car and charger reported 95kW".
As someone on reddit pointed out, the 200A max for CCS roughly calculates out to 4.2V x 98 "cells" x 200A = 82.3 kW. The charging voltage could be slightly higher than 4.2 per cell but not that much.
 
BlueKonaEV said:
I have never seen the charge rate increase when battery cooling kicks in.. I just see a 2kw difference between the number on the dash and the energy flowing into the battery..
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Correct, me neither. As pointed out by others, there is definitely something funny going on. It just doesn't make sense.

BTW, he switched to eco mode at 55% SOC.
 
However, it would be very nice to see in reality such a loading speed as in this accelerated video ;-)
 
I don't know if it's technically possible, but I can imagine that the Kona EV could theoretically be charged with a much higher power, but it has a built-in lock due to the risk of damage to the battery and fire. If such a blockade would fail, then connecting a higher than the permissible charging power would allow the battery to be charged very quickly. And very dangerous, I suppose. Who knows, and maybe the famous Kona EV fires during DC charging were the result of such damage to the charging power limiter? Could someone with a technical background relate to this hypothesis?
 
In DC charging, the charger determines the current, as requested by the vehicle - the CCS charging connector pins connect direct to the battery via a contactor - the car has no way to reduce power other than asking the charger to do it via the communications interface.
I would expect that the car monitors current and can disconnect if it exceeds the requested current, though that would be a last-resort action as opening the contactor under a full load could cause damage to the contactor.
 
BlueKonaEV said:
I was just made aware of a Kona owner who reported up to 93kw charging speed. There is a thread on Reddit..

https://www.reddit.com/r/KonaEV/comments/kueqej/94kw_charging_speeds_someone_asked_for_a_video/

Some suggested that the additional juice is for the battery warmer and not actually for the battery.. Very interesting..
Click to expand...

The Kona Electric was originally spec'd at 75kW maximum charging rate, like my 2019 Niro EV, but the 2021 Kona seems to now have a 100kW charging limit. This means that the battery will charge at up to 100kW, it is all battery charging not battery heater. Even if the heater comes on the car would never draw more than the maximum spec'd power limit. This means that the car in the video must be a 2021, or a late 2020, that has the newer and faster charging rate as compared to the 2019.

Here is the Hyundai Canada brochure that shows the charging limit of 100kW at the bottom of page 9: https://www.hyundaicanada.com/-/med...ish/2021-hyundai-kona-ev-product-card-eng.pdf
 
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The onboard charger has nothing to do with rapid-charge rates.
Some very early Kona publicity materials listed 100kW, but this was an error.
The only mention I can see on that brochure is "80% in less than an hour with a Level 3 ( 100kW) charger" - i hink that just means that you need a >50kW capable charger to get that rate
 
mikeselectricstuff said:
The onboard charger has nothing to do with rapid-charge rates.
Some very early Kona publicity materials listed 100kW, but this was an error.
The only mention I can see on that brochure is "80% in less than an hour with a Level 3 ( 100kW) charger" - i hink that just means that you need a >50kW capable charger to get that rate
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Interesting information, thanks. Kia Canada's Website has the Niro EV showing 1h15min (50 kW)/54min (100 kW). I would infer that both cars now have a higher rated charging limit on DCFC since the video shows the car charging at 94kW. My 2019 Niro EV never hit more than 75kW, even in optimal conditions on a 350kW station.
 
mikeselectricstuff said:
The onboard charger has nothing to do with rapid-charge rates.
Some very early Kona publicity materials listed 100kW, but this was an error.
The only mention I can see on that brochure is "80% in less than an hour with a Level 3 ( 100kW) charger" - i hink that just means that you need a >50kW capable charger to get that rate
Click to expand...
I was typing too quickly, sorry. I edited for clarity. Thanks. Also to note, the Kia Canada's Website has the Niro EV showing 1h15min (50 kW)/54min (100 kW). I would infer that both cars now have a higher rated charging limit on DCFC since the video shows the car charging at 94kW. My 2019 Niro EV never hit more than 75kW, even in optimal conditions on a 350kW station.
 
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