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US 2014/0111120 A1Published application
Vehicle, power supply system, and method for controlling power supply system
AssigneeToyota Jidosha Kabushiki Kaisha
InventorNoritake MITSUTANI
Life of this patent
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Abstract
When an ECU disconnects a second power storage device BAT2 from a drive device 90 while a hybrid vehicle is traveling, ECU disconnects one of a contact point B1 and a contact point G2 of a system main relay SMR2 and causes the vehicle to continue traveling using electric power supplied from a first power storage device BAT1 to drive device. After the vehicle finishes traveling, ECU performs a discharging operation for discharging a charge remaining in a first capacitor C1 and a second capacitor C2 with the one contact point of system main relay SMR2 being disconnected. If the charge is not discharged appropriately, ECU determines that welding occurs in at least one of system main relay SMR1 and system main relay SMR2.
Claims7
A vehicle, comprising:
- a power supply system;
- a drive device driving using electric power supplied from said power supply system;
- and
- a control device performing control of said power supply system and said drive device, wherein
- said power supply system includes
- a first power storage device capable of supplying electric power to said drive device,
- a second power storage device connected to said drive device in parallel with said first power storage device,
- a first switch switching between supply and interruption of the electric power between said first power storage device and said drive device,
- a second switch having a first contact point connected to a positive electrode of said second power storage device and a second contact point connected to a negative electrode of said second power storage device for individually switching between supply and interruption of electric power from said second power storage device to said drive device, and
- a capacitor connected between paths coupling said second switch to said drive device, and
- when said control device disconnects said second power storage device from said drive device while the vehicle is traveling, said control device disconnects one of the first contact point and the second contact point of said second switch and causes the vehicle to continue traveling using the electric power supplied from said first power storage device to said drive device, and after the vehicle finishes traveling, said control device performs a discharging operation for discharging a charge remaining in the capacitor with the one contact point of said second switch being disconnected, and if the charge is not discharged appropriately, said control device determines that welding occurs in at least one of said first switch and said second switch.
8 more elements
A power supply system for supplying electric power to a load, comprising:
- a first power storage device capable of supplying electric power to said load;
- a second power storage device connected to said load in parallel with said first power storage device;
- a first switch switching between supply and interruption of the electric power between said first power storage device and said load;
- a second switch having a first contact point connected to a positive electrode of said second power storage device and a second contact point connected to a negative electrode of said, second power storage device for individually switching between supply and interruption of electric power from said second power storage device to said load;
- a capacitor connected between paths coupling -said second switch to said load;
- and
- a control device, wherein
- when said control device disconnects said second power storage device from said load while a vehicle is traveling, said control device disconnects one of the first contact point and the second contact point of said second switch and causes the vehicle to continue traveling using the electric power supplied from said first power storage device to said load, and after the vehicle finishes traveling, said control device performs a discharging operation for discharging a charge remaining in the capacitor with the one contact point of said second switch being disconnected, and if the charge is not discharged appropriately, said control device determines that welding occurs in at least one of said first switch and said second switch.
5 more elements
A method for controlling a power supply system for supplying electric power to a load,
- said power supply system including
- a first power storage device capable of supplying electric power to said load,
- a second power storage device electrically connected to paths supplying the electric power from said first power storage device to said load, and capable of supplying electric power to said load,
- a first switch switching between supply and interruption of the electric power between said first power storage device and said load,
- a second switch having a first contact point connected to a positive electrode of said second power storage device and a second contact point connected to a negative electrode of said second power storage device for individually switching between supply and interruption of the electric power to said load, and
- a capacitor connected between paths coupling said second switch to said load,
- said method for controlling comprising the steps of:
- disconnecting, when said second power storage device is disconnected from said load while a vehicle is traveling, one of the first contact point and the second contact point of said second switch, and causing the vehicle to continue traveling using the electric power supplied from said first power storage device to said load;
- performing, after the vehicle finishes traveling, a discharging operation for discharging a charge remaining in said capacitor with the one contact point of said second switch being disconnected;
- and
- determining, if the charge is not discharged appropriately, that welding occurs in at least one of said first switch and said second switch.
8 more elements
Dependencies are inferred from the claim text.