Battery module

A battery module comprising:

• a plurality of battery cells stacked in a predetermined stacking direction and electrically connected together;
• a plurality of bus bars that electrically connect the plurality of battery cells together;
• and
• a plurality of voltage detection wires each connected to one set of two or more battery cells electrically connected together, wherein
• the plurality of battery cells each have a prismatic shape with a long-side direction of each of the battery cells arranged in a direction intersecting the stacking direction of the plurality of battery cells,
• each of the plurality of battery cells includes a positive electrode terminal disposed at one end portion of each of the battery cells in the long-side direction of each of the battery cells and a negative electrode terminal disposed at an opposite end portion of each of the battery cells in the long-side direction of each of the batter cells, and
• the plurality of voltage detection wires are arranged to pass through central portions of the battery cells in the long-side direction of each of the battery cells, midway between the positive electrode terminal and the negative electrode terminal of each of the battery cells,
• wherein the stacking direction of the battery cells of the battery module is defined as a long-side direction of the battery module and a short-side direction of the battery module with respect to the long-side direction of the battery module is defined as a width direction of the battery module, and all of the voltage detection wires are connected to the battery cells on the same, one side in the width direction of the battery module.