A typical MCS (Megawatt Charging System) installation requires dedicated Medium Voltage transformer. An MCS charging park could have for example five charging dispensers. If we consider each port to be 1.5MW capable, an installation would have to supply 7.5MW mains feed. Therefore the most likely scenario is that the infrastructure project will include a dedicated Medium Voltage transformer anyway. Why not use it to our advantage?
Since any CCS, CHAdeMO or MCS charger requires reinforced galvanic isolation, as well as isolation between charging pistols/stalls, we have to provide this isolation somehow. The traditional approach relies on a combination of AC/DC and isolated DC/DC power converters to achieve this. However, if the mains distribution transformer has multiple secondaries with 400/480VAC, we can just run a rectifier and a step-down (buck) converter, and skip the isolation DC/DC completely.
This also improves the overall system efficiency - if we don’t count the efficiency of the medium voltage transformer, we can easily build a 98% efficient MCS charger. The second trick incorporated in the following diagram is to use ADVANTICS off-the-shelf 950V converters, instead of developing 1500V hardware. With two transformer secondaries being rectified separately, and then stepped down separately, we can effectively double our output voltage capability. By installing output contactors capable of series/parallel reconnect, we also double our effective current for lower voltage vehicles.
The proposed system would look like this:
Example calculations of power per block:
Here at ADVANTICS we believe that almost every MCS station will have a battery buffer, given how hard would it be to pull new dedicated power lines, and reserving capacity for potential rush hour truck charging. Therefore it is important how can such a system integrate the battery. In case of transformer coupled MCS concept, it’s very easy - just use either existing ESS (energy storage system) containers, and couple them to the transformer secondaries. The transformer core will then act as a common feed - any MCS pistol/stall can utilize this additional battery capacity.
You can also build an ESS with our converters directly - making it very easy to construct and maintain the overall system. All you need is one ADM-PC-BP25 as a PFC, and one as Boost/Buck, and connect it to the battery of your choice. Since the converters are inherently bidirectional, energy trading with the grid during off-peak hours becomes another revenue stream for the CPO (Charge Point Operator).
Compact and versatile, it supports EV charging protocols like MCS, CCS AC/DC, DIN SPEC 70121, ISO15118-2/-20, NACS, and CHAdeMO. With bidirectional power transfer, Plug and Charge (coming soon), OCPP support, OTA updates, and its flexible mounting options, the SPCC is ideal for charging stations and wallboxes.
Electric Vehicle onboard charge controller for DC and AC charging standards. Aimed to be embedded in any kind of electric vehicle using conductive charging. Enables advanced features such as bidirectional charging using latest standards and Plug’n’Charge.
This power module fits any application where you need bidirectional AC/DC rectification, DC/DC conversion or DC/AC generation, with up to 99% efficiency in a wide operating range.
Optimized to be the last power conversion stage for battery charging, it includes galvanic isolation, insulation fault measurement and fast output discharge circuit. With a maximum efficiency of 98%.
MCP-25 is a series of high efficiency power converters based on the SiC (Silicon Carbide) technology. By combining different (or identical) modules, it is possible to solve most power transfer needs (AC, DC, isolation), up to 500 kW conversion power.
