Funded by the Federal Ministry of Transport, the “AutoStack-Industrie” joint project with 10 industry partners was launched to develop a high-performance fuel cell stack suitable for series production for automotive applications and was successfully completed in 2022.
The fuel cell stack which was developed meets the performance targets with an output of 86.4 kilowatts at the nominal operating point and 97.4 kilowatts peak power. The cell block (excluding end plates) has a volume of 12.82 litres and, at the beginning of its service life, a power density of 6.7 kW·l-¹ at the nominal operating point and 7.6 kW·l-¹ under peak load conditions. The main brief of the ZSW was to carry out flow modelling research and to test the stacks. The diagram below shows the result of a service life test in a dynamic load cycle. The measured voltage degradation rate of 10 μV·h-¹ is indicative of an expected service life of more than 6,000 hours in a driven car and meets the specifications agreed in the project. The operating temperature increased during the shaded periods in the diagram. The gaps represent operation with significant changes to operating conditions and the execution of diagnostic programs.