Patent ID: 7872362

Claim:
A vehicle-use power supply control apparatus comprising: a first electric accumulator for supplying electric power to a load; an alternator driven by a vehicle engine to generate electric power to be supplied to said load and said first electric accumulator; a second electric accumulator parallel-connected to said first electric accumulator; an electric power converter capable of performing two-way power transmission between said first and second electric accumulators; and a power supply control unit including a first function of setting a target power generation efficiency index of said alternator, a second function of setting a target power generation amount of said alternator on the basis of said target power generation efficiency index set by said first function, while referring to a map defining a relationship between a power generation efficiency index and a power generation amount of said alternator, and a third function of controlling an amount and a transmission direction of transmission power of said electric power converter in order that an amount of electric power generated by said alternator becomes equal to said target power generation amount.