Secondary battery

A secondary battery comprising:

• an exterior body;
• and
• an electrode assembly including an alternating plurality of positive electrodes, negative electrodes, and separators disposed between the positive electrodes and the negative electrodes, and an electrolyte, the electrode assembly and the electrolyte being housed in the exterior body,
• wherein
• the electrode assembly is in a form of a step structure including a first region and a second region, the first region being higher than the second region in a cross section of the electrode assembly through the first region and the second region, and
• the electrode assembly comprises:
• at least one of a positive electrode side connecting portion that mutually connects each of positive electrode side connecting tabs of all of the plurality of positive electrodes in the first region and a negative electrode side connecting portion that mutually connects each of negative electrode side connecting tabs of all of the plurality of negative electrodes in the first region;
• at least one of the plurality of positive electrodes includes a positive electrode side extended tab in the second region which is configured to be electrically connected to an external terminal and is separate from the positive electrode side connecting tabs in the first region;
• and
• at least one of the plurality of negative electrodes includes a negative electrode side extended tab in the second region which is configured to be electrically connected to the external terminal and is separate from the negative electrode side connecting tabs in the first region.