Voltage measurement of high voltage batteries for hybrid and electric vehicles
First Claim
1. A system for accurate voltage measurement of a high voltage battery for hybrid and electric vehicles, the system comprising:
- a voltage measurement circuit including an analog sensing circuit for sensing an analog voltage of the high voltage battery, a wave generator circuit for generating an analog periodic signal, and a comparator,the comparator having a first input receiving the sensed analog voltage from the analog sensing circuit, and a second input receiving the analog periodic signal from the wave generator circuit, the comparator producing an output signal based on the comparison of the first and second inputs; and
an optical coupler receiving the comparator output signal and providing a digital output signal that takes the form of a digital periodic signal indicative of the voltage of the high voltage battery, thereby providing an isolation barrier between the high voltage battery and a low voltage system receiving the digital output signal.
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Accused Products
Abstract
A system for accurate voltage measurement of a high voltage battery for hybrid and electric vehicles includes a voltage measurement circuit including an analog sensing circuit, a wave generator circuit and a comparator. The analog sensing circuit senses the analog voltage of the high voltage battery. The wave generator circuit generates an analog periodic signal. The comparator receives the sensed analog voltage and the analog periodic signal from the wave generator circuit. The comparator produces an output signal based on the comparison of the inputs, and the output signal takes the form of a digital periodic signal indicative of the voltage of the high voltage battery.
16 Citations
20 Claims
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1. A system for accurate voltage measurement of a high voltage battery for hybrid and electric vehicles, the system comprising:
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a voltage measurement circuit including an analog sensing circuit for sensing an analog voltage of the high voltage battery, a wave generator circuit for generating an analog periodic signal, and a comparator, the comparator having a first input receiving the sensed analog voltage from the analog sensing circuit, and a second input receiving the analog periodic signal from the wave generator circuit, the comparator producing an output signal based on the comparison of the first and second inputs; and an optical coupler receiving the comparator output signal and providing a digital output signal that takes the form of a digital periodic signal indicative of the voltage of the high voltage battery, thereby providing an isolation barrier between the high voltage battery and a low voltage system receiving the digital output signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A system for accurate voltage measurement of a high voltage battery for hybrid and electric vehicles, the system comprising:
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a voltage measurement circuit including an analog sensing circuit for sensing an analog voltage of the high voltage battery, a wave generator circuit for generating an analog periodic signal, and a comparator, the comparator having a first input receiving the sensed analog voltage from the analog sensing circuit, and a second input receiving the analog periodic signal from the wave generator circuit, the comparator producing an output signal based on the comparison of the first and second inputs, the output signal taking the form of a digital periodic signal indicative of the voltage of the high voltage battery. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19)
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20. A method for accurate voltage measurement of a high voltage battery for hybrid and electric vehicles, the method comprising:
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sensing an analog voltage of the high voltage battery; generating an analog periodic signal; comparing the sensed analog voltage to the analog periodic signal to produce an output signal based on the comparison; and wherein the output signal takes the form of a digital periodic signal indicative of the voltage of the high voltage battery.
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Specification