Patent ID: 8865338

Claim:
A battery module comprising: a plurality of battery cells; a casing in which the plurality of battery cells are housed; a plurality of conductive members that electrically connect the plurality of battery cells; and a voltage detection conductor that constitutes at least a part of an electric circuit, with the electric circuit connecting the plurality of battery cells with a voltage detection circuit that detects voltages at each of the plurality of battery cells and inputting terminal voltages of the plurality of battery cells to the voltage detection circuit, wherein: the casing comprises at least a pair of resin side plates that sandwich and support the plurality of battery cells from both sides; the voltage detection conductor comprises a plurality of detection lines that is made of elongated rectangular metal wires formed in a predetermined shape that corresponds to the shape of the side plates, with each detection line extending from a front end section to another end section according to the shape of the side plates, with the front end section of each detection line being connected to a corresponding conductive member so as to be electronically connected with a corresponding battery cell; and the plurality of detection lines are fixed and integrated together by a resin material so as to maintain the predetermined shape while separated from one another, and the plurality of detection lines thus fixed together is embedded in the side plates by insert molding so as to be integrated with the side plates.