Sealed battery

A sealed battery comprising:

• an electrode assembly including a positive-electrode current collecting portion and a negative-electrode current collecting portion;
• a battery case enclosing the electrode assembly;
• a positive electrode terminal attached to the battery case;
• a first conductive path connecting the positive-electrode current collecting portion and the positive electrode terminal;
• a negative electrode terminal attached to the battery case;
• a second conductive path connecting the negative-electrode current collecting portion and the negative electrode terminal;
• a partition disposed in the battery case and dividing an interior space of the battery case into a first space enclosing the electrode assembly and a second space being independent from the first space;
• a first electrolyte solution enclosed in the first space;
• a second electrolyte solution enclosed in the second space and containing an addition agent generating a gas when a predetermined voltage is applied to the second electrolyte solution;
• and
• a current interrupt mechanism including a partition wall defining the second space, the partition wall including a current path portion serving as a current path of the sealed battery, the current interrupt mechanism interrupting the current path in response to an internal pressure of the second space that is higher than a predetermined pressure;
• wherein:
• one of the first conductive path and the second conductive path passes through the current path of the current interrupt mechanism, and is in contact with the second electrolyte solution enclosed in the second space;
• and
• the other one of the conductive paths includes a potential application line that is wired to the second electrolyte solution of the second space.