Heat utilization system container using hydrogen storage alloy and method of filling hydrogen into the container

摘要

PROBLEM TO BE SOLVED: To prevent inflammation of hydrogen inside during the welding by filling with hydrogen a container into which is sealed an alloy for storing hydrogen to restrict the leakage of hydrogen in the closing of an open hole. SOLUTION: A link part S5 of a cell S is provided with an open hole A for evacuation or the filling of hydrogen. An outer cylinder A1 outward is provided on the perimeter of the open hole A. The open hole A is closed by a lid B, which B is provided with an inner cylinder B1 overlapping the inside of the outer cylinder A1. After the filling of the hydrogen, the lid B is pressed into the open hole A to close the open hole A simply. After the cooling, the lap margin between the outer cylinder A1 and the inner cylinder B1 is welded, a process in which an internal pressure drops to eliminate the leakage of hydrogen before the welding. The outer cylinder A1 and the inner cylinder B1 are made of stainless steel with a large heat capacity and the heat during the welding is hard to transmit internally while a cooling is made during the welding to minimize the amount of hydrogen to fill the interior thereby preventing inflammation of hydrogen as caused by the heat of welding.