Battery module

Abstract

A battery module includes a plurality of cylindrical batteries, a wiring board, a plurality of positive electrode-side current collector members, and a plurality of negative electrode-side current collector members. The wiring board is a wiring board having a multilayer structure in which wiring patterns are formed in a plurality of layers, and includes a positive electrode-side wiring pattern and a negative electrode-side wiring pattern. The respective wiring patterns are formed as different layers of the wiring board. Each positive electrode-side current collector member electrically connects a sealing body functioning as a positive electrode external terminal of each cylindrical battery and the positive electrode-side wiring pattern. Each negative electrode-side current collector member electrically connects a case body functioning as a negative electrode external terminal of each cylindrical battery and the negative electrode-side wiring pattern.

1 . 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:   an insulating member provided to a side of the sealing body so as to cover the plurality of cylindrical batteries, the insulating member having a plurality of metal members;   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 first metal member of the plurality of metal members facing to a surface of the insulating member opposite to a surface of the insulating member facing the plurality of cylindrical batteries, the first conductive member electrically connecting the plurality of first current collector members to each other; and   a second metal member of the plurality of metal members facing to the surface of the insulating member opposite to the surface of the insulating member facing the plurality of cylindrical batteries, the second metal member electrically connecting the plurality of second current collector members to each other,   wherein   the first meal member is separated from the second metal member in a direction perpendicular to a direction where the plurality of cylindrical batteries and the insulating board are aligned.   
     
     
         2 . The battery module according to  claim 1 , wherein the sealing body has a top surface whose center portion is recessed,
 and wherein each of the plurality of first current collector members connects to the center portion recessed,   and wherein a top portion of the case body is nearer to the insulating plate than the top surface of the sealing body.