Testing DC fast-charging parameters requires sinking very high power to emulate the behavior of an electric vehicle (EV) battery, contributing to high lab overhead costs for electricity and cooling required to dissipate the generated heat. DC fast chargers operate at 1,000 V or beyond, with outputs ranging from 15 kW to 350 kW or higher. EV charge speed depends on the charge rate of the charging station, the maximum power input the EV can handle, and the EV's charging curve. The charging curve tracks how much power it can take over time as it charges.
As new EV models are rolling out each year and DC fast-charging infrastructures are ramping up, engineers need a solution that can emulate an EV battery to test performance and interoperability of the charging station. Testing these high-power systems requires a system which can sink the power offered by the EV charging station, and which supports the communications protocols required to initiate and monitor charging. Software is also necessary to automate DC charging tests using different test standards and parameters.
Additional resources for testing EV fast chargers
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