Protective element, protective element fabrication method, and battery module in which protective element is embedded

摘要

A protective element including a substrate having a first insulating member and a concave portion formed thereon, a heating body layered on the concave portion of the substrate, a second insulating member layered on the substrate so as to cover at least covering the heating body, first and second electrodes layered on a surface of the substrate on which the second insulating member is layered, a heating body electrode layered on the second insulating member so as to be superimposed with the heating body, and electrically connected to a current path between the first and the second electrodes as well as onto and the heating body, and a low-melting point metal layered from the heating body electrode toward the first and the second electrodes configured to cause a blowout of the current path between the first and the second electrodes by heating.

主权项

1. A protective element comprising:
a substrate comprising a first insulating member and a concave portion; a heating body layered on the concave portion of the substrate; a second insulating member layered on the substrate covering the heating body; first and second electrodes layered on a surface of the substrate on which the second insulating member is layered; a heating body electrode layered on the second insulating member superimposed with the heating body, and electrically connected to a current path between the first and the second electrodes and the heating body; and a low-melting point metal layered between the heating body electrode and the first and the second electrodes so as to cause a blowout of the current path between the first and the second electrodes by heating, wherein the heating body electrode is disposed at a same or lower position in a thickness direction of the substrate relative to the first and the second electrodes.