Patent ID: 7466108
Filing Date: 2008-12-16
Classification: H02J,H02P,Y02T

Abstract:
1. A battery charging control device comprising: a rectification and output adjustment circuit that can switch between a state where an output of an AC generator is rectified to supply a charging current to a battery, and a state where the supply of the charging current from said AC generator to said battery is stopped; and a battery voltage adjustment control circuit that controls said rectification and output adjustment circuit so as to supply the charging current from said AC generator to the battery when a voltage across said battery is equal to or lower than a target value, and stop the supply of the charging current to said battery when the voltage across said battery exceeds the target value, wherein said device further comprises: a load driving switch that is inserted between said battery and a load of said battery and kept turned on while receiving a drive signal; and a load driving switch control circuit that performs control to provide a drive signal to said load driving switch and turn on said load driving switch when said AC generator generates the output and a voltage across said load is equal to or lower than a set value, and stop the provision of the drive signal to said load driving switch and turn off said load driving switch when the voltage across said load exceeds the set value, and the set value of the voltage across said load is set to be lower than the target value of the voltage across said battery.