Multistage power supply system and method for providing uninterrupted power to vehicle circuitry
First Claim
1. A multistage power supply system for providing uninterrupted low voltage electrical power to vehicle control circuitry in an electric or hybrid-electric vehicle having a vehicle battery, the system comprising:
- a first stage comprising a converter for receiving a low voltage input from the vehicle battery and converting the vehicle battery low voltage input to a high voltage output; and
a second stage provided in series communication with the first stage, the second stage comprising a converter for receiving one of a rectified AC high voltage input and the first stage high voltage output and converting the one of the rectified AC high voltage input and the first stage high voltage output to a low voltage output to power the vehicle control circuitry;
wherein the low voltage output is produced by the second stage from the rectified AC high voltage input when the rectified AC high voltage input is present, and the low voltage output is produced by the second stage from the first stage high voltage output when the rectified AC high voltage input is absent without detection of the absence of the rectified AC high voltage input and wherein the low voltage output produced by the second stage from the first stage high voltage output provides at least a power level to the vehicle control circuitry required for the control circuitry to perform diagnostic operations or to permit reprogramming of the control circuitry when the rectified AC high voltage input is absent.
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Accused Products
Abstract
A multistage power supply system and method for providing uninterrupted low voltage electrical power to control circuitry in an electric or hybrid-electric vehicle. A first stage includes a converter for receiving a low voltage input from a vehicle battery and converting the vehicle battery low voltage input to a high voltage output. A second stage provided in series communication with the first stage includes a converter for receiving one of a rectified AC high voltage input and the first stage high voltage output and converting the one of the rectified AC high voltage input and the first stage high voltage output to a low voltage output for use in powering the vehicle control circuitry. The low voltage output is produced by the second stage from the rectified AC high voltage input when the rectified AC high voltage input is present, and the low voltage output is produced by the second stage from the first stage high voltage output when the rectified AC high voltage input is absent.
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Citations
16 Claims
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1. A multistage power supply system for providing uninterrupted low voltage electrical power to vehicle control circuitry in an electric or hybrid-electric vehicle having a vehicle battery, the system comprising:
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a first stage comprising a converter for receiving a low voltage input from the vehicle battery and converting the vehicle battery low voltage input to a high voltage output; and a second stage provided in series communication with the first stage, the second stage comprising a converter for receiving one of a rectified AC high voltage input and the first stage high voltage output and converting the one of the rectified AC high voltage input and the first stage high voltage output to a low voltage output to power the vehicle control circuitry; wherein the low voltage output is produced by the second stage from the rectified AC high voltage input when the rectified AC high voltage input is present, and the low voltage output is produced by the second stage from the first stage high voltage output when the rectified AC high voltage input is absent without detection of the absence of the rectified AC high voltage input and wherein the low voltage output produced by the second stage from the first stage high voltage output provides at least a power level to the vehicle control circuitry required for the control circuitry to perform diagnostic operations or to permit reprogramming of the control circuitry when the rectified AC high voltage input is absent. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method for providing uninterrupted low voltage electrical power to vehicle control circuitry in an electric or hybrid-electric vehicle having a vehicle battery and a multistage power supply, the method comprising:
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receiving, at a first stage, a low voltage input from the vehicle battery; converting, by the first stage, the vehicle battery low voltage input to a high voltage output; receiving, at a second stage provided in serial communication with the first stage, one of a rectified AC high voltage input and the high voltage output; and converting, by the second stage, the one of the rectified AC high voltage input and the high voltage output to a low voltage output to power the vehicle control circuitry; wherein the low voltage output is produced from the rectified AC high voltage input when the rectified AC high voltage input is present, and the low voltage output is produced from the high voltage output when the rectified AC high voltage input is absent without detection of the absence of the rectified AC high voltage input and wherein the low voltage output produced by the second stage from the first stage high voltage output provides at least a power level to the vehicle control circuitry required for the control circuitry to perform diagnostic operations or to permit reprogramming of the control circuitry when the rectified AC high voltage input is absent. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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Specification