Method And System To Prevent Vehicle Driveaway During Battery Charging
First Claim
1. A method to prevent vehicle movement when a battery onboard the vehicle is being charged, the vehicle having a mechanical restraint and a battery charging receptacle, comprising:
- preventing the mechanical restraint from being released while an external power supply cord is plugged into the receptacle.
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Abstract
A system and method are disclosed for preventing driveaway or roll away of a plug-in electric vehicle when it is being charged or is coupled to an external power supply cord. When it is detected based on at least one of the following conditions: a current is flowing to the battery charger, a voltage source is coupled to the battery charger, an access door allowing access to the receptacle on board the vehicle is open and/or a plug detect switch indicates that a plug is coupled with the receptacle, a mechanical restraint on the driveline is prevented from being released. The mechanical restraint may be a parking brake. Alternatively, the mechanical restraint may include preventing the gear shift selector from being moved out of the park position.
35 Citations
20 Claims
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1. A method to prevent vehicle movement when a battery onboard the vehicle is being charged, the vehicle having a mechanical restraint and a battery charging receptacle, comprising:
preventing the mechanical restraint from being released while an external power supply cord is plugged into the receptacle. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A vehicle system, comprising:
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an electric motor, a battery electrically coupled to the electric motor; a receptacle coupled to the battery, the receptacle being adapted to couple with a plug of an external power supply cord to charge the battery from an external electric power supply; a driveline mechanically coupled to the electric motor; wheels coupled to the driveline; a mechanical restraint coupled to the driveline, the mechanical restraint preventing rotation of at least one wheel when applied; and an electronic control unit electronically coupled to the vehicle, the electronic control unit preventing release of the mechanical restraint when a vehicle signal indicates at least one of;
a plug is coupled with the receptacle, and an access door proximate the receptacle is open. - View Dependent Claims (13, 14, 15, 16)
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17. A plug-in vehicle system, comprising:
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an electric motor, a battery electrically coupled to the electric motor; a battery charger electrically coupled to the battery; an operator actuated gear shift selector; a solenoid proximate the gear shift selector and configured to selectively lock the gear shift selector; a receptacle coupled to the battery charger, the receptacle being adapted to couple with a plug of an external power supply cord to charge the battery from an external electric power supply; a driveline mechanically coupled to the electric motor; wheels coupled to the driveline; a mechanical restraint coupled to the driveline, the mechanical restraint preventing rotation of at least one wheel when applied; and an electronic control unit electronically coupled to the vehicle, the electronic control unit actuating the solenoid to lock the gear shift selector and preventing release of the mechanical restraint when a vehicle signal indicates at least one of;
a plug is coupled with the receptacle and an access door proximate the receptacle is open. - View Dependent Claims (18, 19, 20)
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Specification