Power supply and distribution system for an electric vehicle and a method for controlling the system

Abstract

A power supply and distribution system for an electric vehicle, includes a high voltage battery pack with first and battery modules, wherein the battery modules each have an individual power output connector. The battery pack is monitored and controlled by a Battery Electrical Control Module; wherein the battery modules are connected to respective DC-DC converters that convert high voltage DC to low voltage DC. The battery modules are individually connected to high voltage loads via a dual back-to-back switch unit that includes a back-to-back switches respectively connected to the battery modules and a Microcontroller in communication with the Battery Electrical Control Module. The Microcontroller controls the back-to-back switches, which are connected in parallel to high voltage equipment of the vehicle and arranged to be individually controlled by the Microcontroller.