System and method for controlled charging of multiple electrical vehicles on a single distribution transformer

Abstract

Electric Vehicles (EV's) are becoming common place and uncontrolled charging eventually will require upgrading existing electrical infrastructure before the end of life of the equipment. By considering the loading on the existing transformer and not charging all vehicles on the transformer at the same time, existing distribution transformers can remain in use for their normal lifespan without degradation. Examining the load involves using data collected from sensors on the transformer and chargers connected to the transformer, and incorporating current limiting functions to maximize charging capability without harming the existing distribution network. The present invention uses a wireless (Wi-Fi, Bluetooth, radio etc.) communicating microcontroller in the distribution transformer to communicate with another wireless communicated device that is talking to the electric vehicle. With the given data, an electrical board that is in the transformer will provide charging direction in terms of time and total current draw. The present invention will enable controlled charging of multiple EV's.

Dependencies are inferred from the claim text.