Apparatuses and methods for over-temperature protection of energy storage devices
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United States of America Patent
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Dec 6, 2016
Grant Date -
Sep 18, 2014
app pub date -
Mar 14, 2014
filing date -
Mar 15, 2013
priority date (Note) -
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status (Latency Note)
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Abstract
A charging system includes a temperature sensor to generate a temperature signal responsive to a temperature of an energy storage device. A circuit temperature sensor generates a circuit temperature signal responsive to a temperature of a semiconductor device. A charge adjuster generates a desired current signal responsive to the temperature signal and the circuit temperature signal. A comparator compares a charge-current level signal to the desired current signal to generate a charge adjustment signal. A charge controller on the semiconductor device generates and adjusts a current of a charging signal for charging the energy storage device responsive to the charge adjustment signal. The charge adjuster may generate a reduction signal when the temperature signal is above a throttle threshold, reduce a digital desired current signal responsive to the reduction signal, and convert the digital desired current signal to the desired current signal as an analog signal.
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