Assembled battery and cell connection method

An assembled battery comprising:

• a plurality of cells each including external terminals provided to a casing;
• and
• a terminal connection member configured to electrically connect the external terminal of one of two adjacent cells to the external terminal of the other of these adjacent cells, wherein
• the external terminal and the terminal connection member are connected to each other by means of welding,
• the terminal connection member comprises an intervening portion connected to a welding portion connected to the external terminal, and a main body portion extending from the intervening portion toward the external terminal side of the adjacent cell,
• the intervening portion is configured to have a thickness that is smaller than that of the main body portion and is in a direct contact with the external terminal, and
• the external terminal comprises an electrode terminal having a terminal main body portion protruding from the casing and a flange portion provided on an outer edge of the terminal main body portion, wherein
• the intervening portion is in a direct contact with the flange portion.