Battery management device, vehicle having the same, and method for controlling the vehicle
AssigneesHyundai Motor Company, Kia Motors Corporation
InventorsChangmin Lee, Young Min Yun
Life of this patent
Estimating the term…
Abstract
A battery management device for preventing a battery from being damaged by a low voltage includes a storage configured to store a first protection voltage and a second protection voltage corresponding to a protection mode of the battery; a voltage detector configured to detect a voltage of the battery; a controller configured to confirm the detected voltage, to enter the protection mode when the detected voltage of the battery is the first protection voltage, to check a time point when the detected voltage of the battery is the second protection voltage, and to release the protection mode when a predetermined time elapses from the time point.
Claims18
A battery management device comprising:
- a storage configured to store a first protection voltage and a second protection voltage corresponding to a protection mode of a battery, the first protection voltage including a voltage corresponding to a minimum necessary voltage of the battery required to drive a motor, the second protection voltage being higher than the first protection voltage;
- a voltage detector configured to detect a voltage of the battery;
- and
- a controller configured to:
- enter the protection mode when the detected battery voltage is less than or equal to the first protection voltage, and
- release the protection mode when the detected battery voltage exceeds the second protection voltage and a certain period of time has elapsed after the detected battery voltage exceeded the second protection voltage,
- wherein the certain period of time includes a period of time for which a voltage of the battery is dropped from the second protection voltage to the first protection voltage at a maximum output of the battery.
A vehicle comprising:
- car wheels configured to use power from at least one of a motor and an engine as driving power;
- a battery configured to supply power to the motor;
- a battery management device configured to:
- have a voltage detector for detecting voltage of the battery,
- enter a protection mode when the detected battery voltage is less than or equal to a first protection voltage while the vehicle is in an electric vehicle (EV) mode in which the vehicle is driven using the motor only, the first protection voltage including a voltage corresponding to a minimum necessary voltage of the battery required to drive the motor,
- output available power of the battery while performing the protection mode, and
- release the protection mode when the detected battery voltage exceeds a second protection voltage, which is higher than the first protection voltage, and a certain period of time has elapsed after the detected battery voltage exceeded the second protection voltage;
- and
- a controller configured to receive available power of the battery in the protection mode of the battery and control operation of the motor based on the received battery available power,
- wherein the certain period of time includes a period of time for which a voltage of the battery is dropped from the second protection voltage to the first protection voltage at a maximum output of the battery.
A method for controlling a vehicle driven by using a motor and an engine, the method comprising steps of:
- detecting voltage of a battery configured to supply power to the motor while the vehicle is in an electric vehicle (EV) mode in which the vehicle is driven only by the motor;
- entering a protection mode of the battery when the detected voltage of the battery is less than or equal to a first protection voltage, the first protection voltage including a voltage corresponding to a minimum necessary voltage of the battery required to drive the motor;
- driving the engine when entering the protection mode;
- controlling an output of the motor based on available power of the battery while the battery is in the protection mode;
- releasing the protection mode when the detected voltage of the battery exceeds a second protection voltage, which is higher than the first protection voltage, and a certain period of time has elapsed after the detected battery voltage exceeded the second protection voltage;
- stopping driving of the engine when the protection mode is released;
- and
- controlling the output of the motor based on discharging limitation power of the battery,
- wherein the certain period of time includes a period of time for which a voltage of the battery is dropped from the second protection voltage to the first protection voltage at a maximum output of the battery.
Dependencies are inferred from the claim text.