Molten salt battery

Abstract

A molten salt battery includes an electrode group which includes a first electrode, a second electrode, and a separator electrically insulating the first electrode and the second electrode; a molten salt electrolyte; a bottomed case which houses the electrode group and the molten salt electrolyte, the bottomed case having an opening; a cover plate which seals the opening of the case; a first external terminal of the first electrode and a second external terminal of the second electrode which are provided on the cover plate; a bus bar component fixed to the first external terminal; a first insulating part which is interposed between the first external terminal and the bus bar component so as to electrically insulate the bus bar component and the first external terminal; a thermal fuse component which is electrically connected to the bus bar component and the first external terminal and provides electrical continuity between the bus bar component and the first external terminal when the ambient temperature is lower than a reference temperature T; and a fixing member which fixes the thermal fuse component to the cover plate in such a state that the thermal fuse component is in contact with or in close vicinity to the surface of the cover plate. The molten salt battery is configured such that a charge current is input from the bus bar component to the first external terminal through the thermal fuse component.