Pre-charge quick key cycling protection
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United States of America Patent
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Mar 27, 2018
Issued Date -
N/A
app pub date -
Aug 30, 2013
filing date -
Aug 30, 2013
priority date (Note) -
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Abstract
A vehicle is disclosed comprising a pre-charge circuit, including a resistor, that selectively connects a traction battery to an electrical impedance. A controller is programmed to inhibit pre-charging for an amount of time when a predetermined number of pre-charge cycles have occurred within a preceding predetermined period of time. The predetermined number of pre-charge cycles may be based on a voltage or current magnitude across the resistor during the previous pre-charge cycles. The predetermined number of times may be modified based on prior successful and failed pre-charge cycles. A method of limiting a temperature increase of a pre-charge resistor is disclosed comprising counting a number of prior pre-charge cycles and inhibiting pre-charging when the number of prior pre-charge cycles within the preceding period of time exceeds a threshold.
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