Proximity detection circuit for on-board vehicle charger
First Claim
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1. A vehicle power system having a high voltage battery being operable to output current sufficient to power an electric motor operable to drive the vehicle;
- a low voltage battery being operable to output current sufficient to power one or more vehicle subsystems, the low voltage battery being unable to output current sufficient to power the electric motor;
a low voltage power supply being operable to regulate current provided from the low voltage battery when in an active state and inoperable to regulate current provided from the low voltage battery when in a sleep state, the vehicle power system comprising;
a on-board vehicle charger being operable to charge the high voltage battery with current provided through a cordset connected thereto, the on-board charger requiring regulated current from the low voltage power supply in order to detect connection of the cordset;
a proximity detection circuit being operable to transition the low voltage power supply from the sleep state to the active state upon connection of the cordset to the on-board vehicle charger.
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Abstract
A proximity detection circuit suitable for use with an on-board vehicle charger, such as but not limited to the type of charges used within hybrid and hybrid electric vehicles, to facilitate current conservation during period of time when it is unnecessary or otherwise undesirable for the on-board charger to test for connection of a cordset or other connection used to connect the on-board charger to a charging station or other current source.
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Citations
20 Claims
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1. A vehicle power system having a high voltage battery being operable to output current sufficient to power an electric motor operable to drive the vehicle;
- a low voltage battery being operable to output current sufficient to power one or more vehicle subsystems, the low voltage battery being unable to output current sufficient to power the electric motor;
a low voltage power supply being operable to regulate current provided from the low voltage battery when in an active state and inoperable to regulate current provided from the low voltage battery when in a sleep state, the vehicle power system comprising;a on-board vehicle charger being operable to charge the high voltage battery with current provided through a cordset connected thereto, the on-board charger requiring regulated current from the low voltage power supply in order to detect connection of the cordset; a proximity detection circuit being operable to transition the low voltage power supply from the sleep state to the active state upon connection of the cordset to the on-board vehicle charger. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
- a low voltage battery being operable to output current sufficient to power one or more vehicle subsystems, the low voltage battery being unable to output current sufficient to power the electric motor;
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9. A proximity detection circuit for use within a power supply requiring transitioning from a sleep state to an active state in order to supply voltage required by an on-board charger to test for a connection of a cordset, the proximity detection circuit comprising:
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a connection circuit formed in part by the cordset when connected to the on-board charger; and a wake-up circuit being operable to generate a wake-up voltage sufficient to transition the power supply from the sleep state to the active state upon the cordset being connected to the on-board charger. - View Dependent Claims (10, 11, 12, 13, 14, 15)
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16. A method for activating an inactive power supply used to supply a test voltage required by an on-board charger to test for connection of a cordset, the method comprising:
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detecting a connection of the cordset; and activating the inactive power source to an active state after detecting connection of the power source and before providing the test voltage. - View Dependent Claims (17, 18, 19, 20)
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Specification