Power supply degradation determination apparatus
First 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, andthe 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.
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Accused Products
Abstract
A power supply degradation determination apparatus which is mounted to the vehicle includes a controller and a DC-DC converter that control execution of a charge phase in which a capacitor capable of accumulating regenerative energy of the vehicle is charged and execution of a discharge phase in which the capacitor is discharged. The controller detects the internal resistance of the capacitor using the difference between the terminal voltage and the open circuit voltage of the capacitor during the execution of the discharge phase and the discharge current thereof, determines whether the internal resistance is a predetermined value or more, and delays the execution start of the discharge phase for a predetermined time when the internal resistance is determined to be the predetermined value or more.
8 Citations
8 Claims
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1. A power supply degradation determination apparatus which is mounted to a vehicle, comprising:
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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. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A power supply degradation determination apparatus which is mounted to a vehicle, comprising:
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a battery which is capable of accumulating regenerative energy of the vehicle; 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; 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, only when the execution of the discharge phase is started within a predetermined time after the execution of the charge phase is terminated in a case where the discharge phase is executed subsequent to the execution of the charge phase by the charge and discharge control unit and to determine whether the internal resistance is a predetermined value or more.
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Specification