Charging system and charging control method of electric powered vehicle
AssigneeToyota Jidosha Kabushiki Kaisha
InventorsYoshinobu Sugiyama, Ryoji Oki
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Abstract
A power storage device mounted on an electric powered vehicle is configured to include a plurality of battery units. A charger outputs onto power lines the charging power for charging the power storage device by a power supply external to the vehicle. A plurality of relays switch the electrical connection between the power lines and the plurality of battery units. A control device controls the plurality of relays to reduce the number of battery units that are the subject of charging when the current leakage value during overall charging of the plurality of battery units is high.
Claims20
A charging system of an electric powered vehicle incorporating a traction electric motor, comprising:
- a power storage device configured to include a plurality of power storage units for storing electric power to be supplied to said traction electric motor,
- first and second power lines to which charging power for charging said power storage device is supplied,
- a plurality of open/close devices for switching electrical connection between said first and second power lines and said plurality of power storage units,
- a detector for detecting current leakage during charging of said power storage device, and
- a control unit for controlling said plurality of open/close devices to modify the number of power storage unit(s) connected to said first and second power lines among said plurality of power storage units, according to a current leakage detection value by said detector during charging of said power storage device.
A method for controlling charging of an electric powered vehicle incorporating a traction electric motor and a power storage device for storing electric power to be supplied to said traction electric motor,
- said power storage device configured to include a plurality of power storage units,
- said charging control method comprising the steps of:
- detecting current leakage during charging of said power storage device, and
- charging said power storage device having modified the number of power storage units connected to first and second power lines to which charging power for charging said power storage device is supplied, according to a detected current leakage detection value.
The method for controlling charging of an electric powered vehicle according to 9, wherein
- in said detecting step, said current leakage detection value is detected during charging under a first state where all said plurality of power storage units are electrically connected to said first and second power lines, and
- in said charging step, when said current leakage detection value under said first state exceeds a reference value, said power storage device is charged under a second state where a subset of said plurality of power storage units is electrically connected to said first and second power lines.
Dependencies are inferred from the claim text.