BATTERY MODULE HAVING A GAS-BASED FIRE EXTINGUISHING AGENT GUIDE BLADE FOR EXTINGUISHING BATTERY CELL UNIT, AND BATTERY RACK AND ENERGY STORAGE SYSTEM INCLUDING THE BATTERY MODULE

According to the present disclosure, there may be provided a battery module including: a cell assembly including battery cells arranged to face each other in one direction; a bus bar assembly coupled to a side surface of the cell assembly on which electrode leads of the battery cells are located; and guide blades arranged in front of the bus bar assembly in a direction corresponding to an arrangement direction of the battery cells, wherein each of the guide blades has a plate surface facing at least one battery cell, and is coupled to the bus bar assembly to, when gas is generated in at least battery cell, rotate by a certain angle due to gas pressure.