An apparatus for preventing overcharge of a battery in an eco-vehicle includes: a detector detecting the overcharge of the battery; and a signal processor controlling a high voltage relay according to an output signal output from the detector to block a charge of the battery.

After an alkaline secondary battery is determined to be in an over-discharge state, a battery pack is discharged while an electrolytic solution contained in the alkaline secondary battery in the over-discharge state is decomposed so that traveling using power of a motor is performed. The electrolytic solution remains in the alkaline secondary battery even when the alkaline secondary battery is in the over-discharge state. The alkaline secondary battery in the over-discharge state can be discharged and a vehicle can be allowed to travel by decomposing the electrolytic solution. In this manner, a traveling distance available during evacuation traveling of the vehicle can be increased.

A vehicle includes: a power receiving part; an operating part configured to allow a driver to select a parking lock state or a non-parking lock state; a parking lock device configured to be mechanically switchable between the parking lock state and the non-parking lock state; and a controller configured to control the parking lock device according to an electric signal output from the operating part. While the power receiving part is receiving electric power with the parking lock device being in the parking lock state, the controller: sends a first command that commands stop of power feeding to the power receiving device to the power feeding device when the non-parking lock state is selected; and controls the parking lock device so that the parking lock device is switched from the parking lock state to the non-parking lock state after electric power has decreased to a predetermined value or lower.

When the heat stress cumulative value of a second boost converter is equal to or greater than a second threshold value that is less than a first threshold value and the heat stress cumulative value of a first boost converter is less than a third threshold value that is equal to or less than the second threshold value, the first boost converter is controlled by voltage control and the second boost converter is controlled by power control. When the heat stress cumulative value of the first boost converter is equal to or greater than the second threshold value and the heat stress cumulative value of the second boost converter is less than the third threshold value, the first boost converter is controlled by the power control and the second boost converter is controlled by the voltage control.

A method for preventing over discharge of a battery includes steps of: detecting a gradient of a road on which a vehicle is running by a controller, when a battery is discharged under a state that an engine of the running vehicle is operated, detecting a clutch driving state of an engine clutch, which connects or disconnects the engine and an electric motor, after detecting the road gradient, detecting a SOC (State of Charge) of the battery after detecting the clutch driving state of the engine clutch, and carrying out a torque reserve control allowing more torque to be reserved in the engine, using a combination of the road gradient, the clutch driving state, and the battery SOC, such that the battery SOC is not lowered below a certain amount.

When the heat stress cumulative value of a second boost converter is equal to or greater than a second threshold value that is less than a first threshold value and the heat stress cumulative value of a first boost converter is less than a third threshold value that is equal to or less than the second threshold value, the first boost converter is controlled by voltage control and the second boost converter is controlled by power control. When the heat stress cumulative value of the first boost converter is equal to or greater than the second threshold value and the heat stress cumulative value of the second boost converter is less than the third threshold value, the first boost converter is controlled by the power control and the second boost converter is controlled by the voltage control.

An electrified vehicle according to an exemplary aspect of the present disclosure includes, among other things, an energy recovery mechanism, and a controller configured to selectively activate at least a battery cooling mode to dissipate excess power from the energy recovery mechanism.

A method for preventing over discharge of a battery includes steps of: detecting a gradient of a road on which a vehicle is running by a controller, when a battery is discharged under a state that an engine of the running vehicle is operated, detecting a clutch driving state of an engine clutch, which connects or disconnects the engine and an electric motor, after detecting the road gradient, detecting a SOC (State of Charge) of the battery after detecting the clutch driving state of the engine clutch, and carrying out a torque reserve control allowing more torque to be reserved in the engine, using a combination of the road gradient, the clutch driving state, and the battery SOC, such that the battery SOC is not lowered below a certain amount.

After an alkaline secondary battery is determined to be in an over-discharge state, a battery pack is discharged while an electrolytic solution contained in the alkaline secondary battery in the over-discharge state is decomposed so that traveling using power of a motor is performed. The electrolytic solution remains in the alkaline secondary battery even when the alkaline secondary battery is in the over-discharge state. The alkaline secondary battery in the over-discharge state can be discharged and a vehicle can be allowed to travel by decomposing the electrolytic solution. In this manner, a traveling distance available during evacuation traveling of the vehicle can be increased.