Battery module comprising cooling plate filled with phase change material

A battery module comprising:

• a plurality of battery cells;
• a plurality of cooling plates each installed between adjacent battery cells among the plurality of battery cells to absorb heat from the plurality of battery cells;
• a heat transfer interface material coupled to one side of the plurality of battery cells to be in contact with the plurality of cooling plates, and receiving heat from the cooling plates;
• and
• a cooling channel coupled to one side of the heat transfer interface material to receive heat from the heat transfer interface material and transfer heat to outside,
• wherein each cooling plate of the plurality of cooling plates includes plurality of chambers containing a phase change material,
• wherein the plurality of chambers are arranged such that a chamber located farther from the heat transfer interface material contains the phase change material having lower phase change temperatures than the phase change material contained in a chamber located closer to the heat transfer interface material.