Cell circuit interrupter

A sealed galvanic cell comprising a conductive container having an upstanding wall open at one end and closed at the opposite end and including in said container a positive electrode, a negative electrode and an electrolyte, and said conductive container being in electrical contact with one of said electrodes;

• a first cover mounted over said open end of said conductive container, said first cover being secured to and electrically insulated from said conductive container and in electrical contact with the other electrode;
• an electrically insulating material disposed at the central area of the closed end of the conductive container leaving the external surface of the upstanding wall adjacent the closed end of the conductive container exposed, a rigid conductive second cover terminating with a dependant flange such that the rigid second cover forceably slides onto and is secured to the closed end of the container by an interference fit thereby adapting said second cover as the terminal for the electrode in electrical contact with said conductive container;
• and wherein the closed end of the conductive container will bulge upon a predetermined pressure buildup within the conductive container to force the second cover to slide off and break the electrical contact between the inner surface of the depending flange and the outer surface of the upstanding wall thereby breaking the electrical contact between the second cover and the electrode in electrical contact with said conductive container.