Innolectric Introduces 22 kW Silicon Carbide On-Board Charger

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 nameOBC42OBC82
Component design400 V800 V
Input power22 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)
Frequency50 − 60 Hz (+/- 1 %)
Efficiency (2 – 22 kW)> 94 %
Efficiency (2 – 10 kW)> 96 %
Output voltage (DC)210 – 510 V400 – 850 V
Output current (DC)Up to 70 AUp to 45 A
Charging communicationPWM (IEC 61851), PLC (DIN SPEC 70121, ISO 15118)
Interfaces1 x CAN J1939 / 1 x Service CAN
Degree of protectionIP 6K6K
Dimensions (l x w x h)Approx. 570 x 370 x 115 mm
WeightApprox. 18 kg
Operating temperatures– 40 – +85 °C

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