Automated Optimization of a Cell Assembly Using Format-Flexibly Produced Pouch Cells

The production of variable cell formats can offer advantages compared to standard formats. The flexibility of the cell format results in new degrees of freedom, whereby a large number of possible arrangements and interconnections of the cells can be realized in a for the battery system available installation space of a specific application. This flexibility also results in an increase and variety of solutions, so that the development of a method supports both the developer in the synthesis, taking into account different, functionally relevant boundary conditions, and in the evaluation of the system properties. Therefore, the authors present a method that allows an automated optimization of the topology of a battery system considering the arrangement, interconnection logic as well as resulting energy and power of the battery system.

For this purpose, a parameterization of the cell modules with derived product requirements such as voltage level and cooling variants is first performed in order to subsequently perform a scan of the installation space and thereby determine potential arrangements of the cell modules. In order to optimize the overall system, the individual module arrangements are then evaluated on the basis of their interconnection options and the degree to which the installation space is filled. In addition, the resulting interconnection topology is mapped in an electrical model, which enables an evaluation of the usable performance under a defined load.