US Patent 10000125 Power supply apparatus and method for hybrid vehicle

Provided are a power supply apparatus and method for a hybrid vehicle. The power supply apparatus is integrated with a power conversion device and an energy storage device in order to reduce a size and production cost of the power supply apparatus and includes a battery unit including a plurality of battery cells configured to store different levels of power and a power control unit configured to control the battery unit to integrally or selectively output the power of the plurality of battery cells based on whether an engine of the hybrid vehicle generates power.