Bus bar module and bus bar module manufacturing method

1. A bus bar module comprising:

a plurality of bus bars that establish mutual electric connections among a plurality of unit cells of a battery assembly constituted by the unit cells;

a plurality of electric wires that are connected and welded to surfaces of the bus bars respectively; and

an electric wire router that is made of insulating resin and includes a plurality of bus bar reception portions provided side by side in an array direction of the unit cells, the bus bars being received in the bus bar reception portions respectively, wherein

each of the bus bar reception portions includes:

an opening portion that is formed to be opposed to a back surface of a corresponding one of the bus bars in accordance with a connection portion with a conductor of a corresponding one of the electric wires; and

an electric wire tip holding portion that is made of the insulating resin and provided adjacently to the opening portion so as to hold the vicinity of a welding portion of the conductor,

the electric wire tip holding portion includes a pair of clamping portions that are made of the insulating resin and opposed to each other, and

the vicinity of the welding portion engages and is held between the pair of clamping portions.

2. The bus bar module according to claim 1 , wherein the electric wire router includes electric wire routing portions that receive the electric wires in a stacking direction of the unit cells, and

each of the electric wire routing portions includes an electric wire holding portion that holds the electric wire extending from the tip portion side of the conductor held by a corresponding one of the electric wire tip holding portions in a state where the electric wire has been bent at least one.

3. The bus bar module according to claim 1 , wherein each of the clamping portions includes a pair of protrusions that made of the insulating resin and are opposed to each other.