PROTECTIVE ELEMENT, PROTECTIVE ELEMENT FABRICATION METHOD, AND BATTERY MODULE IN WHICH PROTECTIVE ELEMENT IS EMBEDDED

摘要

An object of the present invention is to provide a protective element with which, while implementing a reduced height, a reliable blowout of a low-melting point metal upon a current path by heat of a heating body is possible. The protective element includes: a substrate (11) in which a concave portion (11a) is formed, a heating body (12) which is layered in the concave portion (11a); a second substrate (13) which is layered upon the substrate (11) to cover the heating body (12); first and second electrodes (14a), (14b) which are layered upon the surface of the substrate (11) on which the second substrate (13) is layered; a heating body electrode (15) which is layered upon the second substrate (13) to be superimposed with the heating body (12), and which is electrically connected to the heating body (12) and a current path between the first and the second electrodes; and a low-melting point element (16) which is layered from the heating body electrode to the first and second electrodes, and which causes a blowout of the current path between the first electrode and the second electrode by heating. The heating body electrode (15) is positioned in the same location relative to the first electrode (14a) and the second electrode (14b) which is specified in the thickness direction of the substrate (11).