Devices and methods for testing the energy measurement accuracy, billing accuracy, functional performance and safety of electric vehicle charging stations

摘要

Testing of electric vehicle charging stations (EVCS) is performed using a device operable in either or both an active mode and a passive mode. In an active mode, the device provides or is connected with a programmable load capable of emulating the load of an electrical vehicle (EV). In passive mode, the load is an EV with the device being arranged in series between the EVCS and EV. In either case, energy delivery from the EVCS to the load is monitored by the device to determine energy measurement and billing accuracy of the EVCS. This enables a comparison to be made between a measured value of energy delivered and a metered value of energy delivered as given by the EVCS. Other measurements and safety tests may also be performed by the device.

主权项

1. An instrument for accurately verifying the active energy delivered by an electric vehicle charging station (EVCS), comprising:
a primary port for receiving a charging cable normally connecting the EVCS to an electric vehicle; one or more measuring devices which simultaneously make sampling measurements of voltage and current from one or more supply lines delivering power from the EVCS to a load after the charging cable has been received at the primary port; digital processing means configured to calculate a first value of active energy delivered by the EVCS to the load from the sampling measurements obtained from the one or more measuring devices; and at least one output device for displaying or transmitting the first value of active energy delivered or one or more values determined from the first value of active energy delivered for comparison with a metered value of active energy delivered as given by the EVCS.