US Patent 9199546 Audible confirmation of battery charging in electric vehicles

An electric vehicle battery recharging system is disclosed that is capable of generating an audible sound to indicate that the battery system of the vehicle is being recharged. The system includes an audible indicator that is connected or otherwise associated with a controller. The controller is configured to actuate the audible indicator in response to a voltage or current of a battery system rising a predetermined amount after recharging is initiated so as to provide audible confirmation to a recharging operator that the battery system is being recharged.