Battery coupling method and battery coupling device

A battery coupling device for coupling a support member to a battery cell for supporting the battery cell provided with a group of electrodes, the battery coupling device comprising:

• a heating unit configured to heat a protrusion part formed on the support member that protrudes through a hole formed in the battery cell to be pressed from a tip side thereof in order for at least a part of the tip end of the protrusion part to protrude from the hole so as to form a heat-deformed part of a size which prevents extraction from the hole;
• a pressing unit configured to approach and press the support member from a side where the heating unit is positioned;
• and
• a pressurizing mechanism operatively coupled to the heating unit and the pressing unit to cooperatively operate the heating unit and the pressing unit so as to separate the heating unit from the support member as the support member is being pressed by the pressing unit.