Abstract: A hydrogen-generating device is provided, which includes a reaction tank, a first cap, a second cap and a first guiding-pipe. The reaction tank has an accommodation space for accommodating a solid reactant. The first cap covers the accommodation space, wherein the first cap has a plurality of first open-holes. The second cap is disposed on the first cap and has a second open-hole, wherein the first cap and the second cap form a chamber therebetween. The first guiding-pipe passes through the first cap and the second cap to extend to the accommodation space, wherein the first open-holes surround the first guiding-pipe. A liquid reactant is for passing through the first guiding-pipe to arrive in the accommodation space and reacts with the solid reactant to generate a hydrogen. The hydrogen passes through the first open-holes to arrive at the chamber and then is expelled from the second open-hole.

Abstract: A power supply device includes a first case, a second case, a battery module, an air suction element, and a heat exchange module. The first case includes an air hole. The second case is disposed in the first case, and the second case includes a fuel cell therein. The battery module is disposed in the first case. The fuel cell and the battery module supply power to each other. The air suction element is disposed in the first case and near the air hole, and sucks an air into the first case through the air hole. The heat exchange module is disposed in the first case for heating the air. The air is warmed up after flowing by the heat exchange module, and at least a part of the air flows by the fuel cell and the battery module.