Electric Vehicle On-Board Chargers - What do they do?


There are three things needed to charge the majority of today’s electric vehicle batteries - a charging station (public or private), a charging cable (with connector), and an on-board charger. While most people are familiar with EV charging stations, the function of the on-board charger isn’t as well known. 

As the name implies, on-board chargers are mounted inside of a vehicle. Their primary responsibility is to regulate the current and voltage from the charging station to the car batteries. They convert electricity from alternating current to direct current (AC to DC), the latter of which is needed to charge EV batteries. The charging station cable connects (plugs) directly into the OBC.

Most of today's lithium-ion battery powered EVs require either a 3.3 kW or 6.6 kW on board charger module. 3.3 kW OBCs allow a maximum current of 16A, which takes about 5 hours to charge a depleted EV battery at 230 V AC. 6.6 kW OBCs allow a maximum current of 32A which cuts that time down to approximately 2 hours.

EVolve Electrics is the sole distributor of Valeo Siemens’ OEM quality on board chargers in the USA. Valeo Siemens OBCs are available in both 3.3 kW and 6.6 kW power levels. Chargers are compact, liquid cooled, and IP67 rated.

More information about on-board chargers from Valeo Siemens can be found on EVolve Electrics’ website:  https://evolveelectrics.com/collections/chargers-valeo