Patent ID: 9533584
Date: 2017-01-03
CPC Classifications: B60L,G01R,H02J,Y02T

Claim:
1. A power supply degradation determination apparatus which is mounted to a vehicle, comprising: a battery which is capable of accumulating regenerative energy of the vehicle; an electric load which is connected to the battery; a charge and discharge control unit configured to control execution of a charge phase in which the battery is charged and a discharge phase in which the battery is discharged; a standby unit configured to delay an execution start of the discharge phase by the charge and discharge control unit for a predetermined time; and an internal resistance determination unit configured to determine an internal resistance of the battery, wherein the internal resistance determination unit is configured to detect the internal resistance of the battery using a difference between a terminal voltage and an open circuit voltage of the battery during the execution of the discharge phase, and a discharge current of the battery during the execution of the discharge phase, and to determine whether the internal resistance is a predetermined value or more, and the standby unit is configured to delay the execution start of the discharge phase by the charge and discharge control unit for the predetermined time while stopping the charge and discharge of the battery, when the internal resistance is determined to be the predetermined value or more by the internal resistance determination unit.