ELECTRIFIED VEHICLE HIGH VOLTAGE CONTACTOR CONTROL
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United States of America Patent
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Issued Date -
Dec 28, 2023
app pub date -
Jun 23, 2022
filing date -
Jun 23, 2022
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Abstract
An electrified vehicle includes a contactor having a coil operable by a low-voltage control signal to selectively electrically couple a terminal of a high-voltage bus to a charger receiving power from an external source. A programmed controller predicts the time it will take for the contactor to close after receiving a command based on the coil temperature and voltage of the command signal. The controller generates the low-voltage control signal responsive to a difference between bus voltage and charger voltage being less than a first threshold at the predicted closing time of the contactor. The control signal may also depend on the rate of change of the charger voltage being below a second threshold.
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