CPC H02J 7/0013 (2013.01) [H02J 7/00711 (2020.01); H02J 7/007182 (2020.01)] | 8 Claims |
1. A charging device, comprising:
a capacitor divider circuit including a plurality of battery state inputs operably coupleable to a plurality of battery devices, and a pulse width modulation (PWM) generator operable to selectively charge the battery devices;
a plurality of switching transistors each operatively coupled at a gate terminal thereof to a respective PWM control output of a plurality of PWM control outputs; and
a flying capacitor operatively coupled at a first terminal thereof to a first plurality of the switching transistors, operatively coupled at a second terminal thereof to a second plurality of the switching transistors;
a first comparator operatively coupled to the capacitor divider circuit and operable to determine whether a first difference between voltages associated with the battery devices satisfies a first voltage threshold; and
a second comparator operatively coupled to the capacitor divider circuit and operable to determine whether a second difference between voltages associated with the battery devices satisfies a second voltage threshold,
wherein the capacitor divider circuit is further operable to, in response to a determination that the first difference satisfies the voltage threshold, block charging of one or more of the battery devices, and
wherein the second voltage threshold is a minimum device voltage threshold, and the determination that the second difference satisfies the second voltage threshold comprises a determination that the second difference is less than the voltage threshold.
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