A battery module includes a plurality of electrochemical cells, each with a pair of electrical terminals, a first elongated member, electrically connecting a first terminal of at least one cell of the electrochemical cells to a second terminal of at least one other cell, and a second elongated member, electrically connecting a third terminal of at least one of the cells to a fourth terminal of at least one other cell, wherein at least a portion of the first and second elongated members is a hollow section defining a fluid pathway configured to transmit a fluid for transferring heat to or from the electrical terminals of the electrochemical cells.