HIGH VOLTAGE BUS CONTACTOR FAULT DETECTION
First Claim
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1. A system for a vehicle comprising:
- a pair of electrical buses connected to terminals of a traction battery via a shared positive contactor and a pair of negative contactors; and
a controller configured to, responsive to a request to close the contactors and a difference between voltage magnitudes of the buses being greater than a predefined threshold, actively discharge one of the buses to reduce the difference.
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Abstract
A system for a vehicle includes a pair of electrical buses connected to terminals of a traction battery via a shared positive contactor and a pair of negative contactors. The system further includes a controller configured to, responsive to a request to close the contactors and a difference between voltage magnitudes of the buses being greater than a predefined threshold, actively discharge one of the buses to reduce the difference.
102 Citations
17 Claims
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1. A system for a vehicle comprising:
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a pair of electrical buses connected to terminals of a traction battery via a shared positive contactor and a pair of negative contactors; and a controller configured to, responsive to a request to close the contactors and a difference between voltage magnitudes of the buses being greater than a predefined threshold, actively discharge one of the buses to reduce the difference. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method for a vehicle comprising:
responsive to a request to close a pair of contactors and a difference between voltage magnitudes of the buses being greater than a predefined threshold, actively discharging one of a pair of electrical buses until the magnitudes are within a predefined range of each other, wherein the buses are connected to terminals of a traction battery via a shared positive contactor and a respective negative contactor. - View Dependent Claims (9, 10, 11, 12, 13)
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14. A dual-bus arrangement for a vehicle comprising:
a controller configured to, prior to issuing a command to open negative contactors connecting respective negative terminals of a pair of electrical buses to a traction battery, actively discharge both buses responsive to a voltage magnitude of one of the buses being greater than a predefined threshold. - View Dependent Claims (15, 16, 17)
Specification