Hyundai Ioniq 5 Amazes: Real Fast Charging Session Data Analyzed

It literally tramples the Audi e-tron, despite a smaller battery.

Here we have a real treat for EV enthusiasts – a comprehensive, fast charging analysis of the brand new Hyundai Ioniq 5, based on the real-world data provided by the Hyundai Motor Group.

Unlike the previous artificial example, this time we can take a look at charging results of Hyundai Ioniq 5 from 10% to 80% State of Charge (SOC) in South Korea on April 20, 2021, at an outside temperature of 19°C and the battery temperature of 15°C (initial, we guess).

“*This video is the actual instrument cluster of the IONIQ 5, recorded during ultra-fast charging at Hyundai EV Station Gangdong (Gil-dong, Gangdong-gu, Seoul) at 12:00pm on April 20, 2021 (Tuesday).

– Detail conditions: The outside temperature was 19°C and the battery temperature was 15°C. (Charging performance improves at the ideal battery temperature of 25°C.)”

Here we would like to highly appreciate that Hyundai Motor Group provided such an informative video with details in the description – great job.

The outcome is simply amazing, far above any other charging curve in a mainstream electric car. It literally tramples the Audi e-tron, despite a smaller battery. Let’s get into details!

Charging power vs state-of-charge (SOC)

The charging curve is quite complex, with multiple sharp increases and decreases along the way. It starts at about 115 kW at 10% SOC, at 14-15% SOC it increases to about 187 kW, and then again to 220 kW at 29-30% SOC.

The peak range is quite wide: between 30 to 51%. The peak value of more than 225 kW appears to be reached around 51% SOC, but then power quickly decreases (maybe due to too high temperature of the battery cells) to “just” 120 kW at 52-54%. Once the temperature stabilizes (we guess), the charging power increased once again to 170 kW. By 79-80% it decreases to around 130 kW.

It seems that Hyundai very closely monitors the battery temperature and adjusts the power immediately.

Comparison of charging power

And now it’s time for a duel between two heavyweight contenders in terms of fast charging. Hyundai Ioniq 5 against the well-known Audi e-tron quattro 55 (2019 version data).

The South Korean newcomer charges at a higher power than the Audi e-tron for most of the SOC, its battery pack is 10% smaller (77 vs 95 kWh). Hyundai Ioniq 5 has higher peak and average (20-80% SOC) values.

An interesting thing happens at 70-80% SOC, where both charging curves not only are at similar charging power, but also decrease at a similar SOC – like they would have the same battery characteristics (or at least the same strategy), that requires such reduction.

Comparison of State-of-charge (SOC) vs time

Charging time tells everything – you can recharge between 20-80% SOC about 5 minutes (±1 minute) quicker in the Hyundai Ioniq 5 (roughly 25% quicker to 80% SOC).

*The starting points were adjusted to the lowest common SOC.

Comparison of C-rate

The C-rate comparison reveals how much higher the power load is on the Hyundai Ioniq 5 battery (in relation to its capacity), compared to the Audi e-tron.

Hyundai Ioniq 5’s curve basically jumps on top of the Audi e-tron’s curve, reaching over 80% higher peak and 44% higher average (20-80% SOC).

Comparison of range replenishing speed

The differences between the Hyundai Ioniq 5 and Audi e-tron culminate in the comparison of the range replenishing speed.

The Hyundai Ioniq 5 charges at higher power and is more efficient, which in effect translates into a much higher rate of replenishing range. The Audi e-tron would not have any chance in the long-range challenge as it would lose a couple minutes at each DC fast charger.

A little bit of summary:

DC Fast Charging Comparison by InsideEVs
Model
[data source]
Drive /
Battery
(kWh)
Max
Power
Avg
Power
(20-80%)
Max
C-Rate
Avg
C-Rate
(20-80%)
WLTP range
rep. rate
(20-80%)
2019 Audi e-tron quattro 55 SUV
[Fastned]
AWD
95 kWh
155 kW149 kW1.61.612.4 km/min
7.7 mi/min
2021 Hyundai Ioniq 5
[Hyundai]
AWD
77 kWh
225 kW180 kW2.92.320 km/min
12.4 mi/min

WLTP Range:

  • 2019 Audi e-tron quattro 55 SUV – 417 km (259 miles)
  • 2021 Hyundai Ioniq 5 – 480 km (298 miles)

Conclusions

Hyundai Ioniq 5’s fast charging capabilities, in the 10-80% SOC range for which we have data, are simply amazing.

Once drivers around the world confirm similar results as presented by the Hyundai Motor Group, we might have a new fast-charging king.

We would like to see what is happening with the charging power above 80% (hopefully there will be at least a decent rate for those who need to fully charge for another stretch).

A side note: Fast charging in 15 minutes or so (20-80% SOC), and roughly 20 km/min (12.4 mi/min) average (20-80% SOC), might make it difficult to order some food and eat before charging ends. A 15 minute break every 290 km (180 miles) does not sound like a lot.

2021 Hyundai Ioniq 5 :: DC Fast Charging Summary by InsideEVs
Drive: AWD; Battery pack (net / total): 72.6 / 77 kWh
[Data source: Hyundai]
Peak Power
Peak C-rate

Average Power (20-80% SOC)
Average-to-Peak Power
Average C-rate (20-80% SOC)

Time (20-80% SOC)

225 kW
2.9

180 kW
80%
2.3

15 min

Range Replenishing Speed (Average 20-80% SOC):
WLTP20 km/min (12.4 mi/min)

General info:

* Some values on the charts are estimated from the data source.

** Temperature of the battery cells might highly negatively affect charging capabilities. We don’t have data about temperatures of the battery at the beginning and during the charging process. In cold or hot weather, as well as after driving very dynamically, charging power might be significantly lower than shown on the charts (in extreme cases charging might be impossible until the battery temperature will not return to an acceptable level).

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