Hyundai and Kia improve the thermal management of the EV batteries they use

9 June 2020, 12:09:23

Hyundai and Kia improve the thermal management of the EV batteries they useHyundai and Kia have announced that their heat pump technology for EV batteries has been improved. This technology was introduced in 2014 for the Kia Soul EV and this its first major improvement. The main change is that the system now gathers excess heat not only from power electrics (PE) modules (such as drive motors, on-board chargers, and inverters), but also from the battery pack and slow charger. The system uses the heat generated by these components to vaporize refrigerant from liquid to gas form. High-pressure gas is discharged from the compressor and forced into a condenser to be converted back into a liquid. This process generates additional heat energy that is recovered by the heat pump and used to warm the cabin.

This captured energy improves the efficiency of the HVAC (heating, ventilation and air conditioning) system, recycling it to more efficiently heat up the cabin and minimize battery power consumption. By reducing the load on the battery, the heat pump cuts energy consumption from the HVAC system, maximizing the available electric driving range of the car. As a result, Hyundai and Kia EVs offer a more consistent range in temperatures where other EVs start to see a significant decline in the distance possible from a single charge.

The Norwegian Automotive Federation (NAF) recently compared 20 EVs in cold and warm weather conditions to identify models with the most consistent driving range and charging performance. The test monitored the performance deviation of each vehicle in cold conditions compared to quoted manufacturer figures. The Kona Electric took first place, travelling 405km in the cold - compared to the 449km quoted under WLTP combined cycle testing conditions (23°C / 73°F). In severe cold weather, the Kona Electric offered 91 percent of its WLTP combined cycle range, deviating just 9 percent from its claimed all-electric driving range.

A water-cooling system for Hyundai and Kia’s EV battery packs, rather than conventional air cooling, have yielded further increases in range without increasing physical dimensions. This development means battery cells in Hyundai and Kia EVs can be packaged much more tightly, with water-cooling channels taking up less space than air-cooling channels, increasing battery density by up to 35%. This innovation means the latest EVs from Hyundai and Kia offer around twice as much driving range and battery capacity compared to the their first-generation EVs - and are capable of travelling significantly further on a single charge.

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EV Specifications

Complete specifications of EVs, grouped according to their brand and year

AudiBMWBytonChevroletDaciae.GOFIATFordGenesisHondaHyundaiJaguarKIAMazdaMercedes-BenzMGMININIONissanOpelPeugeotPolestarPorscheRenaultRivianSEATŠKODAsmartTeslaVolkswagenVolvo

Featured

Specifications of some of the most interesting and anticipated EVs.

2022 Audi e-tron S Sportback quattro

2022 Audi e-tron S Sportback quattro

Doors: 5, Seats: 5
Length: 193.0 in / 4902 mm
Height: 63.6 in / 1615 mm
Curb weight: 5941.46 lb / 2695 kg
Location: Rear
Location: Front
Battery: 95 kWh, Voltage: 396 V

2022 Audi e-tron S quattro

2022 Audi e-tron S quattro

Doors: 5, Seats: 5
Length: 193.0 in / 4902 mm
Height: 64.1 in / 1629 mm
Curb weight: 5941.46 lb / 2695 kg
Location: Rear
Location: Front
Battery: 95 kWh, Voltage: 396 V

2021 Audi e-tron S Sportback quattro

2021 Audi e-tron S Sportback quattro

Doors: 5, Seats: 5
Length: 193.0 in / 4902 mm
Height: 63.6 in / 1615 mm
Curb weight: 5941.46 lb / 2695 kg
Location: Rear
Location: Front
Battery: 95 kWh, Voltage: 396 V

2021 Audi e-tron S quattro

2021 Audi e-tron S quattro

Doors: 5, Seats: 5
Length: 193.0 in / 4902 mm
Height: 64.1 in / 1629 mm
Curb weight: 5941.46 lb / 2695 kg
Location: Rear
Location: Front
Battery: 95 kWh, Voltage: 396 V

2022 Audi Q4 Sportback e-tron 50 quattro

2022 Audi Q4 Sportback e-tron 50 quattro Vorsprung

Doors: 5, Seats: 5
Length: 180.6 in / 4588 mm
Height: 63.5 in / 1614 mm
Curb weight: 4717.89 lb / 2140 kg
Electric motor #1: 150 kW, 310 Nm, Location: Rear
Electric motor #2: 70 kW, 150 Nm, Location: Front
Battery: 82 kWh, Voltage: 400 V

2022 Audi Q4 Sportback e-tron 50 quattro

2022 Audi Q4 Sportback e-tron 50 quattro Edition 1

Doors: 5, Seats: 5
Length: 180.6 in / 4588 mm
Height: 63.5 in / 1614 mm
Curb weight: 4717.89 lb / 2140 kg
Electric motor #1: 150 kW, 310 Nm, Location: Rear
Electric motor #2: 70 kW, 150 Nm, Location: Front
Battery: 82 kWh, Voltage: 400 V

2022 Audi Q4 Sportback e-tron 50 quattro

2022 Audi Q4 Sportback e-tron 50 quattro S Line

Doors: 5, Seats: 5
Length: 180.6 in / 4588 mm
Height: 63.5 in / 1614 mm
Curb weight: 4717.89 lb / 2140 kg
Electric motor #1: 150 kW, 310 Nm, Location: Rear
Electric motor #2: 70 kW, 150 Nm, Location: Front
Battery: 82 kWh, Voltage: 400 V

2022 Ford F-150 Lightning

2022 Ford F-150 Lightning PLATINUM Extended Range (710A)

Doors: 4, Seats: 5
Length: 232.7 in / 5911 mm
Location: Rear
Location: Front
Battery: 131 kWh

2022 Ford F-150 Lightning

2022 Ford F-150 Lightning LARIAT Extended Range (511A)

Doors: 4, Seats: 5
Length: 232.7 in / 5911 mm
Location: Rear
Location: Front
Battery: 131 kWh

2022 Mercedes-Benz AMG EQS

2022 Mercedes-Benz AMG EQS 53 4MATIC+

Doors: 5, Seats: 5
Length: 205.6 in / 5223 mm
Height: 59.8 in / 1520 mm
Curb weight: 5853.27 lb / 2655 kg
Electric motor #1: 245 kW @ 4500 - 13500 rpm, 565 Nm, Location: Rear
Electric motor #2: 239 kW, 290 Nm, Location: Front
Battery: 107.8 kWh, Voltage: 500 V

2022 Mercedes-Benz EQS

2022 Mercedes-Benz EQS 580 4MATIC

Doors: 5, Seats: 5
Length: 205.4 in / 5216 mm
Height: 59.5 in / 1512 mm
Curb weight: 5698.95 lb / 2585 kg
Electric motor #1: 245 kW @ 4500 - 13500 rpm, 565 Nm, Location: Rear
Electric motor #2: 140 kW, 290 Nm, Location: Front
Battery: 107.8 kWh, Voltage: 500 V

2022 Mercedes-Benz EQS

2022 Mercedes-Benz EQS 450+

Doors: 5, Seats: 5
Length: 205.4 in / 5216 mm
Height: 59.5 in / 1512 mm
Curb weight: 5467.46 lb / 2480 kg
Electric motor: 245 kW @ 4500 - 13500 rpm, 568 Nm, Location: Rear
Battery: 107.8 kWh, Voltage: 500 V

2022 Genesis GV60

2022 Genesis GV60 Performance AWD

Doors: 5, Seats: 5
Length: 177.8 in / 4515 mm
Width: 74.4 in / 1890 mm
Height: 62.2 in / 1580 mm
Curb weight: 4761.98 lb / 2160 kg
Electric motor #1: 160 kW, 350 Nm, Location: Rear
Electric motor #2: 160 kW, 350 Nm, Location: Front
Battery: 77.4 kWh, Voltage: 800 V

2022 KIA EV6

2022 KIA EV6 Extended Range 4WD GT

Length: 184.8 in / 4695 mm
Height: 61.0 in / 1550 mm
Location: Rear
Location: Front
Battery: 77.4 kWh, Voltage: 697 V

2022 KIA EV6

2022 KIA EV6 Extended Range 4WD GT-Line S

Length: 184.8 in / 4695 mm
Height: 61.0 in / 1550 mm
Curb weight: 4530.5 lb / 2055 kg
Electric motor #1: 165 kW @ 4500 - 7700 rpm, 350 Nm @ 4500 - 7700 rpm, Location: Rear
Electric motor #2: 74 kW @ 4500 - 7700 rpm, 255 Nm @ 4500 - 7700 rpm, Location: Front
Battery: 77.4 kWh, Voltage: 697 V

2022 KIA EV6

2022 KIA EV6 Extended Range 4WD GT-Line

Length: 184.8 in / 4695 mm
Height: 61.0 in / 1550 mm
Curb weight: 4497.43 lb / 2040 kg
Electric motor #1: 165 kW @ 4500 - 7700 rpm, 350 Nm @ 4500 - 7700 rpm, Location: Rear
Electric motor #2: 74 kW @ 4500 - 7700 rpm, 255 Nm @ 4500 - 7700 rpm, Location: Front
Battery: 77.4 kWh, Voltage: 697 V

2022 BMW iX xDrive50

2022 BMW iX xDrive50

Doors: 5, Seats: 5
Length: 195.0 in / 4953 mm
Width: 77.4 in / 1967 mm
Height: 66.8 in / 1696 mm
Curb weight: 5379.28 lb / 2440 kg
Electric motor #1: 250 kW, 400 Nm, Location: Rear
Electric motor #2: 200 kW, 352 Nm, Location: Front
Battery: 111.5 kWh, Voltage: 330.3 V

2022 BMW i4 M50

2022 BMW i4 M50

Doors: 5, Seats: 5
Length: 188.3 in / 4783 mm
Width: 72.9 in / 1852 mm
Height: 57.0 in / 1448 mm
Curb weight: 5048.59 lb / 2290 kg
Electric motor #1: 230 kW @ 8000 - 17000 rpm, Location: Rear
Electric motor #2: 190 kW @ 8000 - 17000 rpm, Location: Front
Battery: 83.9 kWh, Voltage: 398.5 V