Patent ID: 8991445
Filing Date: 2015-03-31
Classification: F17C,H01M,Y02E,Y02P

Abstract:
1. A hydrogen filling system to fill a hydrogen fuel tank mounted on a fuel cell vehicle with hydrogen, the hydrogen filling system comprising: a high-pressure water electrolysis device capable of electrolyzing water by supplying electric current from a direct-current power source to produce oxygen and the hydrogen having substantially a same pressure as a maximum filling pressure of the hydrogen fuel tank; a filling mechanism to fill the hydrogen fuel tank with the hydrogen; a hydrogen pipe connecting the filling mechanism and the high-pressure water electrolysis device; at least one hydrogen storage tank provided to the hydrogen pipe to store the hydrogen produced by the high-pressure water electrolysis device at substantially the same pressure as the maximum filling pressure of the hydrogen fuel tank, a capacity of the at least one hydrogen storage tank is smaller than or equal to a capacity of the hydrogen fuel tank; a first valve mechanism arranged downstream of the at least one hydrogen storage tank to allow the hydrogen to flow from the hydrogen storage tank to the filling mechanism; a bypass pipe provided to the hydrogen pipe and connecting the high-pressure water electrolysis device and the filling mechanism to bypass the hydrogen storage tank and the first valve mechanism; and a second valve mechanism arranged on the bypass pipe to allow the hydrogen to flow only from the high-pressure water electrolysis device to the filling mechanism, wherein the system is configured to completely fill the hydrogen fuel tank from the high-pressure water electrolysis device and the at least one hydrogen storage tank without a compressor.