Patent ID: 7852046
Filing Date: 2010-12-14
Classification: H02J

Abstract:
1. A battery-switching apparatus for switching between at least a first battery and a second battery, comprising: a first battery compartment having a first positive terminal and a first negative terminal; a second battery compartment having a second positive terminal and a second negative terminal; a comparator operatively electrically connected to the first negative terminal, electrically connected to the second negative terminal, configured to compare a first voltage at the first negative terminal with a second voltage at the second negative terminal, and configured to generate an output based on such comparison; and a single boost converter electrically connected to each of the first and second battery compartments, the boost converter operative to draw power from a one of the first and second battery compartments based on the output of the comparator; a first transistor operatively connected to the comparator; and a second transistor operatively connected to the comparator, wherein: