Connection module

A connection module configured to be attached to an electricity storage element group in which a plurality of electricity storage elements including positive and negative electrode terminals are arranged, the connection module comprising:

• a busbar configured to connect the electrode terminals of adjacent electricity storage elements to each other;
• an insulating protector configured to hold the busbar in an insulated manner;
• and
• a detection wire configured to be connected to the busbar, and to detect a state of the electricity storage elements,
• wherein the insulating protector includes:
• a main line path in which the detection wire is routed in a bundled form;
• and
• a branch line path that branches from the main line path, has a width narrower than a width of the main line path, and in which the detection wire is routed,
• the branch line path includes:
• a pair of opposing path walls;
• and
• an elastic retaining piece that is formed on at least one of the pair of path walls, and that elastically deforms in a width direction of the branch line path,
• the elastic retaining piece is shaped so that a gap between the elastic retaining piece and one of the pair of path walls opposed thereto is smaller than a diameter of the detection wire,
• wherein the branch line path includes a busbar connection portion at which the detection wire is connected to the busbar, and
• the path wall on which the elastic retaining piece is formed has a slit that is provided adjacent to the elastic retaining piece, and that extends downward from a top portion of the path wall, a distal end portion of the slit being located at a predetermined distance from a bottom surface of the busbar connection portion.