Drive systems of all kinds need energy to do work. Efforts should be made to energy, in other words to minimize the energy losses in the drive system, as social value. Among other things with regard to mobile systems, such as vehicles must also be considered the problem of electrical energy storage. LBATTS The project is aimed at optimizing energy storage through weight reduction through the use of innovative lightweight materials such advanced 'phase change materials "(PCM) on the one hand and optimized thermal management through the introduction of heat buffering in these materials on the other. This should lead to increased performance and efficiency.