METHOD OF BRANCH CIRCUIT CAPACITY UTILIZATION FOR ELECTRIC VEHICLE CHARGING

摘要

Dynamic adjustment of a charge rate of an EVSE on a shared branch circuit, ensuring maximum power delivery to the EVSE without overloading the branch circuit. The Level 1 EVSE and at least one other load are connected to the branch circuit via different electrical outlets. A current monitoring circuit continuously monitors the total current flowing through the branch circuit, and a communications link is established between the monitoring circuit and the EVSE. When the monitored current on the branch circuit is about to exceed a set point corresponding to a rated current capacity of the branch circuit, the charge rate is reduced to maximize power delivery to the EVSE without overloading the branch circuit. The charge rate is increased when more current is available to be drawn from the branch circuit to ensure continuous and uninterrupted delivery of maximum power to the EVSE without exceeding the rated current capacity.

主权项

1. A method of dynamically adjusting a charge rate of an EVSE on a shared branch circuit, comprising:
monitoring, by a current monitoring circuit, a current drawn by all loads on the shared branch circuit, to which the EVSE and an other load are both connected; establishing a communications link between the current monitoring circuit and the EVSE; and causing the EVSE to adjust a charge rate of a charging circuit of the EVSE, by communicating, to the EVSE over the communications link, a representation based on the monitored current, without overloading the branch circuit beyond a rated current capacity of the branch circuit.