BATTERY PACK, ELECTRIC VEHICLE PROVIDED WITH SAME, AND POWER STORAGE DEVICE

摘要

The present invention ensures that a bus bar is electrically connected to the electrode terminal of a battery cell in a stable manner while reducing the production cost of the bus bar. In a battery pack, a metallic-plate bus bar (3) is secured to the electrode terminals (2) of multiple battery cells (1) and the bus bar (3) connects the battery cells (1) in series and/or in parallel. The bus bar (3) has multiple through holes (38) into which the electrode terminals of the battery cells (1) to be connected are inserted. The through holes (38) include a gap through hole (38A) which is bigger than the outer shape of the electrode terminals (2), and in which a loose gap (39) is formed between the through hole (38) and the electrode terminal (2). Moreover, an electrode terminal (2) can be inserted into the gap through hole (38A) in an offset manner. A securing ring (7) is inserted into the electrode terminal (2) inserted into the gap through hole (38A), and the securing ring (7) electrically connects the electrode terminal (2) with the bus bar (3). Moreover, a plated layer (34) is disposed on a portion of the entire surface of the bus bar (3) facing the securing ring (7), and the securing ring (7) is electrically connected to the plated layer (34) on the surface of the bus bar (3).