Motor-driven vehicle and control method thereof

A vehicle, comprising

• a motor for outputting a vehicle required power to the vehicle;
• a power supply for supplying a power to the motor;
• a reduction detecting portion for detecting a reduction in the vehicle required power;
• a motor control portion which operates the motor as a braking portion for applying the brake on the vehicle when a reduction in the vehicle required power is detected;
• an electric power consuming portion for consuming an electric power generated by the motor being operated as the braking portion;
• a switching device which selectively switches a connection state between a first connection state wherein the motor and the electric power consuming portion are connected and a second connection state wherein the power supply and the motor are connected;
• and
• a switching device control portion which controls the switching device so as to establish the first connection state when the reduction detecting portion detects a reduction in the vehicle required power.

A vehicle, comprising

• a motor for outputting a vehicle required power to the vehicle;
• a secondary battery for charging and discharging an electric power;
• an electric power consuming portion for consuming an electric power;
• a switching device which selectively switches a connection state between a first connection state wherein the motor and the electric power consuming portion are connected and a second connection state wherein the secondary battery and the motor are connected;
• a reduction detecting portion for detecting a reduction in the vehicle required power;
• a motor control portion which operates the motor as a braking portion for applying the brake on the vehicle when a reduction in the vehicle required power is detected;
• and
• a switching device control portion which controls the switching device so as to establish the first connection state when a reduction in the vehicle required power is detected and the charged capacity of the secondary battery is equal to or larger than a predetermined value.

A braking control method for a vehicle including a motor for outputting a vehicle required power, a fuel cell system for generating an electric power, a temperature detecting portion for detecting a temperature of the fuel cell system, and an electric power consuming portion for consuming an electric power, the braking control method comprising

• detecting a temperature of the fuel cell system by the temperature detecting portion;
• determining whether the temperature of the fuel cell system is equal to or lower than a predetermined temperature;
• and
• establishing a first connection state selected from the first connection state wherein the fuel cell system and the electric power consuming portion are connected, a second connection state wherein the motor and the electric power consuming portion are connected, and a third connection state wherein the fuel cell system and the motor are connected, when the temperature of the fuel cell system is equal to or lower than the predetermined temperature.

A braking control method for a vehicle including a motor for outputting a vehicle required power to the vehicle, a secondary battery for charging and discharging an electric power, an electric power consuming portion for consuming an electric power, a reduction detecting portion for detecting a reduction in the vehicle required power, and a motor control portion which operates the motor as a braking portion for applying the brake on the vehicle when a reduction in the vehicle required power is detected, the braking control method comprising

• detecting a charged capacity of the secondary battery;
• determining whether the charged capacity of the secondary battery is equal to or larger than a predetermined value;
• and
• establishing a first connection state selected from the first connection state wherein the motor and the electric power consuming portion are connected and a second connection state wherein the secondary battery and the motor are connected, when a reduction in the vehicle required power is detected and the charged capacity of the secondary battery is equal to or larger than the predetermined value.