Secondary battery, electric vehicle, power storage system, and manufacturing method

A method of manufacturing a secondary battery, comprising:

• preparing a battery element;
• enclosing the battery element and an electrolyte solution in a housing;
• forming, on a part of an electrode tab, a fusing part that preferentially fuses rather than another region when a predetermined current flows;
• and
• attaching a reinforcing member to the electrode tab at a section including at least the fusing part in a state that the reinforcing member is distant from the housing.

A secondary battery comprising:

• a battery element;
• a housing that houses the battery element and an electrolyte solution;
• and
• electrode tabs of a positive electrode and a negative electrode that are led out from the housing,
• the secondary battery further comprising:
• a fusing part that is formed on other conductive member connected to the electrode tab and preferentially fuses rather than another region when a predetermined current flows;
• and
• a reinforcing member that is attached to the electrode tab and/or the other conductive member at a section including at least the fusing part in a state that the reinforcing member is distant from the housing.