Patent ID: 8531053
Filing Date: 2013-09-10
Classification: B60K,B60L,B60W,Y02T

Abstract:
1. A variable voltage control system for a hybrid vehicle, the system comprising: a main battery for storing high-voltage power to be supplied to a motor of the vehicle; a sub-battery for storing low-voltage power to be supplied to electronic devices of the vehicle; a low-voltage DC/DC converter (LDC) for converting the high-voltage power of the main battery into the low-voltage power to be supplied to the electronic devices; a power controller for controlling the main battery, the LDC, and the sub-battery, wherein the power controller performs variable voltage control using a low voltage, a reference voltage higher than the low voltage, and a high voltage higher than the reference voltage in accordance with an idle stop state, a constant velocity traveling state, an acceleration state, and a deceleration state of the vehicle; and an air conditioner of the vehicle, wherein when the air conditioner is turned on the power controller performs the controlling of the main battery, the LDC, and the sub-battery at the reference voltage when a gear is at a parking position or a neutral position, at the low voltage when the gear is at other stages and an amount of blowing is maximal, and at the low voltage and the reference voltage when the gear is at the other stages and the amount of blowing is not maximal.