Automatic resetting temperature controlled battery changing system

An automatically resetting system for charging a battery comprising:

• a relay coil presenting a predetermined resistance to the flow of direct current therethrough;
• first and second terminal means for electrically connecting said relay coil between a source of charging current and one electrode of the battery to be charged;
• and,
• circuit means connected between said first and second terminal means in parallel with said relay coil and providing a current path between said terminals,
• said circuit means including automatically resetting temperature responsive switching means actuated between a normally closed position and an open position in response to the temperature of the battery being charged, said temperature responsive switching means opening the current path between said terminals in response to a sensed temperature of the battery above a predetermined temperature value,
• said circuit means further including switching means actuated between a normally closed position and an open position in response to current flow above a predetermined current value through said relay coil, said switching means being connected in series with said temperature responsive switching means and said switching means providing, in the normally closed positions thereof, a current path between said terminals having a resistance to the flow of direct current substantially less than the resistance of said relay coil, whereby a fast charging current is supplied to the battery through said current path at sensed temperatures of the battery below said predetermined temperature value and a trickle charging current is supplied to the battery through said relay coil subsequent to a sensed temperature of the battery above said predetermined value.