BATTERY PACK

A battery pack includes two lid modules and at least one battery module () including battery cells (), a cell holder (), and a liquid-limiting casing (). The liquid-limiting casing () is a tubing structure having a peripheral wall () laterally surrounding a BP-space () and having a first interlocking structure disposed on a vertical end of the liquid-limiting casing (). The lid module includes a second interlocking structure mechanically engaged with the first interlocking structure. The peripheral wall () includes a sealing-member-accommodating structure (). The battery pack further includes a sealing member () accommodated in the sealing-member-accommodating structure (). The lid module has a lid-sealing surface compressing the sealing member (). The mechanical engagement between the first and second interlocking structures restricts a relative lateral displacement between the lid module and the liquid-limiting casing (), thereby maintaining a compression status of the sealing member () against lateral shear forces.