Bus bar module

A bus bar module for a battery module including a plurality of batteries, the plurality of batteries including a first battery cell and a second battery cell, the bus bar module comprising:

• a plurality of bus bars including a first bus bar fixed to the first battery cell and second bus bar fixed to the second battery cell;
• and
• a plate-shaped circuit body having flexibility and including a plurality of connection conductors, each of the connection conductors corresponds to a respective one of the plurality of bus bars, wherein
• the circuit body includes a trunk line part extending along a first direction in which the plurality of battery cells are arranged, and a plurality of branch parts branched from the trunk line part,
• the plurality of branch parts include a coupling branch part connected to the first bus bar and the second bus bar,
• the first bus bar and the second bus bar are adjacent to each other in the first direction,
• the coupling branch part includes a first fixed part fixed to the first bus bar, a second fixed part fixed to the second bus bar, a first extending part, and a second extending part,
• the first extending part extends along the first direction between the trunk line part and the first fixed part,
• the second extending part extends along the first direction between the first fixed part and the second fixed part, and
• the second extending part has a length with which the first bus bar and the second bus bar are fixed to the first battery cell and the second battery cell, respectively, while bending the second extending part to be deformed.