Abstract: A cooling-line system (10) of modular construction, in particular for batteries of electric vehicles, having at least one tubular connecting element (11) composed of a first metal; and at least two tubular or hose-like line elements (15, 16) composed of a second metal, which line elements (15, 16) are or can be connected by the connecting element (11), or at least one such line element (15, 16) which can be connected by the connecting element (11) to a function module to be cooled, preferably a battery.

Abstract: A method for fluidically connecting functional modules that are temperature-controlled by a fluid, preferably battery modules, including a) providing the functional modules with at least one line port for directing the fluid in and/or out, at least two functional modules being arranged at a mutual spacing so the line ports are substantially exactly opposite each other and aligned along a first axis and open into a region between the modules, c) incorporating a preassembled connection assembly in the region, the connection assembly having fluid line(s) for feeding and/or discharging the fluid, and at least two fluidic connector pieces which branch off from the fluid line(s) such that the connector pieces are aligned with the line ports along the first axis, and d) modifying a spacing between the connector pieces and/or a length thereof along the first axis such that the connector pieces each fluidically contact one of the line ports.