Abstract: A storage battery, including: first and second stages connected electrically in series, each stage including at least first, second, and third batteries connected electrically in parallel; at least first and second breakers by which the batteries of the first stage are connected in parallel and by which the batteries of the second stage are connected in parallel, each one of the breakers including: first and second electrodes; a fuse including a conducting link connected in series between the first and second electrodes and a fusible portion; an explosive, with a heat bridge between the fuse and the explosive causing the conducting link to open, the explosive having an explosion initiation temperature that is lower than the melting point of the fusible portion.