BATTERY PACK

A battery pack includes at least one battery module () and two lid modules (). The battery module () includes a plurality of battery cells (), a cell holder (), and a liquid-limiting casing (). The casing () is configured as a tubing structure having a peripheral wall () laterally surrounding a space (). The peripheral wall () defines a module liquid opening () at a vertical end and includes at least one module-wall-vertical-channel () extending vertically therein and at least one module-wall-lateral-channel () extending laterally therethrough. The battery pack defines a first fluid path connecting a lid liquid channel () and the space () via the module liquid opening, and a second fluid path connecting the lid liquid channel () and the space () via the module liquid opening, the module-wall-vertical-channel (), and the module-wall-lateral-channel (). This architecture provides synergistic bulk and targeted cooling without external piping.