Patent ID: 9007001
Filing Date: 2015-04-14
Classification: B60L,H02J,Y02T

Abstract:
1. A power supply system comprising: a rechargeable first electrical storage device; a charging device configured to charge the first electrical storage device with electric power from an external power supply; a second electrical storage device configured to supply an auxiliary load with a power supply voltage lower than an output voltage of the first electrical storage device; a first converter that steps down a voltage of electric power from the first electrical storage device and that supplies a power supply voltage to the auxiliary load and the second electrical storage device; a second converter having a capacity smaller than that of the first converter and configured to charge the second electrical storage device with the electric power from the external power supply; and a controller that, when charging with the use of the external power supply is executed, controls charging electric power from the charging device to the first electrical storage device and charging electric power from the second converter to the second electrical storage device on the basis of a state of charge of the second electrical storage device and a usage state of the auxiliary load; wherein when it is required to charge the second electrical storage device, the controller sets the charging electric power to the first electrical storage device and the charging electric power to the second electrical storage device such that the second electrical storage device is more preferentially charged than the first electrical storage device is charged.