Patent ID: 8053921

Claim:
A driving force generation system, comprising: a power line; a plurality of power storage units connected in parallel with said power line; a rotating electric machine capable of bi-directionally converting electric power and rotational driving force; a power converting unit connected between said power line and said rotating electric machine, for performing power conversion between said rotating electric machine and said power line; allowable power determining means for determining allowable power of charging or discharging in each of said plurality of power storage units, based on state of charge of each of said plurality of power storage units; and target power value determining means for determining, within a range of a sum of allowable powers obtained by summing up said allowable power of each of said power storage units, a target power value to be exchanged between said power line and said rotating electric machine, in accordance with a state of running; wherein said power converting unit is configured to execute a power converting operation such that the power exchanged between said power line and said rotating electric machine attains to said target power value.