Abstract: A battery wiring module including: bus bars including a terminating bus bar having an external connection portion; a case accommodating the bus bars; a cover portion mounted on the case to cover the bus bars while including a fixing portion mounted on the case, a large lid portion attached to the fixing portion via a first hinge portion to be rotatable from a first closed end covering the external connection portion and its peripheral region to a first open end exposing the external connection portion and its peripheral region, and a small lid portion attached to the large lid portion via a second hinge portion to be rotatable from a second closed end covering the external connection portion to a second open end exposing the external connection portion; and a retainer to retain the large lid portion at the first open end.

Abstract: A wiring module that is to be mounted on power storage elements having electrode terminals includes a flexible board to be electrically connected to the electrode terminals, a connector connected to the flexible board, and a casing holding the flexible board and the connector. The casing includes a case body to be fixed to the power storage elements, a connector holder holding the connector, and a connection portion that is expandable and retractable and connects the connector holder and the case body such that the connector holder is movable relative to the case body. The flexible board includes a board body section fixed to the case body, and an extra section extending from the board body section and having an end that is connected to the connector. The extra section moves according to expansion and retraction of the connection portion.