APPARATUSES AND METHODS FOR OVER-TEMPERATURE PROTECTION OF ENERGY STORAGE DEVICES

摘要

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.

主权项

1. A charging system, comprising:
a temperature sensor thermally coupled with an energy storage device and configured for generating a temperature signal responsive to a temperature of the energy storage device; a circuit temperature sensor on a semiconductor device configured for generating a circuit temperature signal responsive to a temperature of the semiconductor device; a charge adjuster operably coupled to the temperature sensor and the circuit temperature sensor, the charge adjuster configured for generating a desired current signal responsive to both the temperature signal and the circuit temperature signal; a comparator configured for comparing a current level signal, indicating level of charge current to the energy storage device, to the desired current signal to generate a charge adjustment signal; and a charge controller on the semiconductor device and configured for generating and adjusting a current of a charging signal for charging the energy storage device responsive to the charge adjustment signal.