Patent ID: 7968222

Claim:
A battery module including cylindrical batteries disposed on a plurality of spacers assembled side-by-side, wherein each spacer of the plurality of spacers comprises: battery receiving parts disposed at a top surface and a bottom surface of a frame of each spacer, in a form that surfaces of the battery receiving parts are toward an outside in opposite directions, respectively, the battery receiving parts having semi-cylindrical inner structures corresponding to outer surfaces of the cylindrical batteries; coupling parts disposed at end portions of opposite sides of the battery receiving parts, between the battery receiving part on the top surface and the battery receiving part at the bottom surface, respectively, wherein the coupling parts are engageable with and disengageable from coupling parts of another spacer of the plurality of spacers; and a through-hole formed through a middle part of each spacer such that the cylindrical batteries disposed on the battery receiving parts fluidly communicate with each other via the through-hole, wherein the coupling parts comprise: a hook disposed at a first side of each of the battery receiving parts; and a groove disposed at a second side of the each of the battery receiving parts, the second side being disposed substantially opposite to the first side, the groove having a structure corresponding to the hook, wherein depressions are formed in the middle parts of the spacer, where the coupling parts are not formed, at the opposite sides of the spacer, respectively, wherein side grooves are disposed along opposite sides of the battery receiving parts except for contact regions of middle parts of the battery receiving parts where two semicircles join, respectively, and wherein horizontal passageways are formed by the side grooves in an assembled configuration and function as coolant flow.