WAKE-BY-CONTROL PILOT CIRCUIT FOR ONBOARD BATTERY CHARGER
First Claim
1. An on-board battery charging system for a vehicle comprising:
- a charging unit including a power converter operable to convert energy supplied by an external power supply into a usable form for charging a high-voltage battery during a battery charging operation;
a controller in communication with the charging unit for monitoring and controlling the battery charging operation, the controller being further operable to detect a connection to the external power supply; and
a wake-by-control pilot circuit powered by a low-voltage power source and connected to an input side of the controller, the wake-by-control pilot circuit having an input for receiving a control pilot signal and outputting a wake-up signal pulse to wake the controller from a sleep mode at least when the external power supply exits a delayed charge mode.
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Accused Products
Abstract
An on-board battery charging system for a plug-in electric vehicle has a charging unit for charging a high-voltage battery and a controller for controlling and managing current flow used to support charging related operations for the high-voltage battery. The controller may detect a connection between the on-board battery charging system and electric vehicle supply equipment (EVSE) and is configured to enter a sleep mode when a control pilot signal from the EVSE is either absent or indicative of a delayed charge mode. The charging system may include a wake-by-control pilot circuit operable to wake the controller from the sleep mode when the control pilot signal is detected and when the control pilot signal transitions from a non-zero static DC voltage to an active PWM signal.
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Citations
20 Claims
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1. An on-board battery charging system for a vehicle comprising:
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a charging unit including a power converter operable to convert energy supplied by an external power supply into a usable form for charging a high-voltage battery during a battery charging operation; a controller in communication with the charging unit for monitoring and controlling the battery charging operation, the controller being further operable to detect a connection to the external power supply; and a wake-by-control pilot circuit powered by a low-voltage power source and connected to an input side of the controller, the wake-by-control pilot circuit having an input for receiving a control pilot signal and outputting a wake-up signal pulse to wake the controller from a sleep mode at least when the external power supply exits a delayed charge mode. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A wake-by-control pilot circuit for generating a wake-up signal pulse to a controller for an on-board battery charging system provided in a vehicle, the wake-by-control pilot circuit comprising:
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an input for receiving a control pilot signal; a pulse width modulation (PWM) detector that outputs signal pulses when the control pilot signal is pulse width modulated; a peak detector connected to an output side of the PWM detector, the peak detector operable to output a lower-voltage DC signal when the PWM detector outputs signal pulses; and an edge detector connected to an output side of the peak detector, the edge detector operable to output the wake-up signal pulse upon a transition from zero to the lower-voltage DC signal at the peak detector output. - View Dependent Claims (13, 14, 15, 16, 17)
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18. An apparatus comprising:
an on-board battery charger connected to a high-voltage battery in a vehicle and operable to charge the high-voltage battery when connected to electric vehicle supply equipment (EVSE), the on-board battery charger including; a controller operable to detect a connection to the EVSE; and a wake-by-control pilot circuit connected to an input side of the controller, the wake-by-control pilot circuit having an input for receiving a control pilot signal from the EVSE and outputting a wake-up signal pulse to wake the controller from a sleep mode when the EVSE exits a delayed charge mode. - View Dependent Claims (19, 20)
Specification