BATTERY MODULE AND ENERGY STORAGE DEVICE

Provided are a battery module and an energy storage device. The battery module includes cylindrical cells arranged in at least two rows and a liquid-cooled assembly including at least one liquid-cooled unit each including a liquid-cooled tube and a cooling fin; the liquid-cooled tube includes a first tube arranged at an upper end of the cooling fin, a second tube, and a third tube arranged at a lower end of the cooling fin; the second tube connects one end of the first tube with one end of the third tube; the cooling fin is arranged between two adjacent rows and is connected to circumferential side surfaces of cells in the two adjacent rows; the first tube and the third tube each have an opening defined in another end thereof facing away from the second tube.