Battery module with improved cooling performance, battery device including said battery module, and method for manufacturing said battery module

A battery module comprising:

• multiple battery cells stacked on each other;
• a spacer provided at an end portion of each battery cell;
• and
• a heat transfer plate having a heat absorption portion arranged between the multiple battery cells stacked on each other to absorb heat from the battery cells and a heat dissipation portion dissipating the heat absorbed by the heat absorption portion to an outside,
• wherein the heat dissipation portion is bent relative to the heat absorption portion, and is exposed through between the battery cells to contact the spacer,
• the spacer includes
• a contact portion having a contact surface contacting the heat dissipation portion, and
• a positioning portion having a surface facing a direction opposite to that of the contact surface and defining a position of the spacer,
• the spacer further includes a stack portion having a first end surface on a top side in a stack direction and a second end surface on a bottom side in the stack direction and configured such that an interval between the first end surface and the second end surface is set to a battery cell stacking interval, and
• of the stacked spacer, the first end surface contacts a second end surface of a spacer positioned thereabove, and the second end surface contacts a first end surface of a spacer positioned therebelow.