New players are pushing forward for more efficient and higher power on-board chargers.
Innolectric, a spin-off company started in 2018 at the University of Bochum in Germany, announced the start of series production of its three-phase 22 kW on-board chargers for electric vehicles.
The new chargers, developed in partnership with STMicroelectronics, are using highly efficient silicon carbide power modules so the efficiency is above 94% and peaks at 96% in the 2-10 kW range.
Innolectric did not reveal its first OEM customers for the on-board chargers, but deliveries are scheduled for Q2 2020.
The three-phase 22 kW chargers (single-phase output is usually a third) are the favorable choice in Europe, where three-phase infrastructure is widely available in most of the countries (both in public and homes).
In the case of Innolectric, the aim is not only to offer a 22 kW, but also to improve efficiency and provide two options for 400 V and 800 V battery systems (there are two separate versions available).
“Depending on the voltage level of the battery and the application, the innolectric On-Board Charger will be available in two different versions. The OBC42 is designed for a voltage level of 400 V (220 V – 510 V) with an output of up to 22 kW. The charging component achieves a minimum efficiency of over 94% between 2 kW and 22 kW. Maximum efficiency is over 96%.
In addition to the AC charging function with integrated PWM communication at up to 22 kW, the innolectric On-Board Charger also supports the DC charging process with international standard-compliant communication according to DIN SPEC 70121 and ISO 15118. A further variant will be the OBC82, which is designed for a voltage level of 800 V (400 V – 850 V) at a power of 22 kW. The charging power can easily be increased by connecting several innolectric On-Board Chargers in parallel.”
Technical informations
Product name OBC42 OBC82 Component design 400 V 800 V Input power 22 kW Input voltage (3~ AC) 380 − 480 V (+ 10 / – 14 %) Input voltage (1~ AC) 120 − 240 V (+ 10 / – 14 %) Input current (AC) 32 A (per phase) Frequency 50 − 60 Hz (+/- 1 %) Efficiency (2 – 22 kW) > 94 % Efficiency (2 – 10 kW) > 96 % Output voltage (DC) 210 – 510 V 400 – 850 V Output current (DC) Up to 70 A Up to 45 A Charging communication PWM (IEC 61851), PLC (DIN SPEC 70121, ISO 15118) Interfaces 1 x CAN J1939 / 1 x Service CAN Degree of protection IP 6K6K Dimensions (l x w x h) Approx. 570 x 370 x 115 mm Weight Approx. 18 kg Operating temperatures – 40 – +85 °C
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