Battery pack comprising fire extinguishing device, and control method using same

A battery pack comprising:

• a plurality of cells, each cell comprising an electrode assembly comprising a positive electrode, a negative electrode and a separator and a pouch-type battery case to receive the electrode assembly;
• an electrode lead extending upward from each of the plurality of cells;
• a module case, the plurality of cells stacked in the module case in a first direction;
• a plurality of dispensers inside the module case having a fire retarding material or fire extinguishing agent, the plurality of dispensers being above the pouch-type battery case of the plurality of cells and between the electrode leads of adjacent cells,
• wherein the plurality of dispensers includes a dispenser on a first side of the electrode lead of each battery cell and a dispenser on a second side of the electrode lead of each battery cell, and
• wherein the fire retarding material or fire extinguishing agent is automatically discharged when swelling of the cell occurs.