Battery module

A battery module having a plurality of cylindrical batteries, each of the plurality of cylindrical batteries having a battery case including a case body and a sealing body, the case body having a bottomed cylindrical shape and containing a power generation element, the sealing body sealing an opening of the case body, the plurality of cylindrical batteries being disposed in a state where a plurality of the sealing bodies face in a same direction,

• the battery module comprising:
• a wiring board provided to a side of the sealing body so as to cover the plurality of cylindrical batteries, the wiring board having wiring patterns in a plurality of layers;
• a plurality of first current collector members electrically connected to the plurality of the sealing bodies, respectively, the plurality of the sealing bodies functioning as first external terminals of the plurality of cylindrical batteries;
• a plurality of second current collector members electrically connected to a plurality of the case bodies, respectively, the plurality of the case bodies functioning as second external terminals of the plurality of cylindrical batteries;
• a one-side wiring pattern of the wiring board, the one-side wiring pattern electrically connecting the plurality of first current collector members to each other;
• and
• an other-side wiring pattern of the wiring board, the other-side wiring pattern electrically connecting the plurality of second current collector members to each other,
• wherein
• the one-side wiring pattern and the other-side wiring pattern are provided on different layers of the wiring board.