Patent ID: 8148847

Claim:
A power source system comprising: a power source comprising: a positive output; a negative output; a plurality of cells, each of which comprises a positive electrode and a negative electrode; a plurality of positive switches, each of which is for connecting or disconnecting a corresponding positive electrode to the positive output; a plurality of negative switches, each of which is for connecting or disconnecting a corresponding negative electrode to the negative output; and a plurality of serializing switches, each of which is for connecting or disconnecting a positive electrode of a corresponding cell to a negative electrode of an adjacent cell; a controller configured for coarsely controlling a power output of the power source by selectively turning on or turning off each of the positive switches, the negative switches, and the serializing switches; and a voltage fine adjusting unit configured for further and finely adjusting the power output of the power source on condition that the coarsely controlled power output of the power source is outside a predetermined acceptable range of power output.