M. Tech. Electrical Engineering. / Hydrogen is in the middle of many discussions as being a good alternative to petrol for the struggle against pollution and global warming. The fact that hydrogen can be found in infinite quantities such as in water or in space makes it a renewable energy. It is the object of much research works in order to be used in replacement of fossil energy such as in hybrid vehicles. However, the main shed of hydrogen is the difficulties to store it. Indeed, being the first element of the periodic table, it is the lightest, spreads a lot and can burn easily. The aim of this project is to achieve the wiring diagram of an electrical bicycle. The use of a hydrogen fuel cell allows feeding the electrical motor of the vehicle. However, due to a matter of low response time of the fuel cell, lithium-ion batteries are also used. Indeed, at the start state for instance, the fuel cell needs some time to warm and reach the nominal temperature of functioning. Lithium-ion batteries allow feeding the electrical motor during the warm up time but also to respond to peak of load. Hybrid motorization represents the future of car industry and tends to be used as a replacement of petrol engine partly responsible of greenhouse gases emissions. Some of those vehicles are already put in place in some big cities all over the world and allow moving rapidly without polluting. This project concerns a hybrid system for an electrical bicycle but the idea is to extend to bigger kind of vehicles.