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| Home > Publications database > An in-depth view into the Tesla Model S modulePart two: Module characterization and comparison to other state of the art EV battery systems |
| Home > Publications database > An in-depth view into the Tesla Model S modulePart two: Module characterization and comparison to other state of the art EV battery systems |
| Abstract | FZJ-2017-02840 |
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2017
Abstract: In current research immense effort is taken into account to improve known battery technologies like lithium-Ion batteries, but also new battery concepts are investigated. In both cases the question often arises, to which extend new concepts can actually compete with state-of-the-art solutions in nowadays applications and which improvements are required in order to achieve compatibility. It is a difficult task to approach this question, especially since it needs to be investigated on system level rather than on material level. Giving a profound answer is part of the work of the Helmholtz-Institute Münster (HIMS). Within the first step of this research, battery applications need to be characterized together with their state of the art solution. Since the electric vehicle application will be one of the main battery applications in the future, it was taken into focus first. For this purpose a battery module from the Tesla Model S electric vehicle was acquired. It consists of 444 battery cells of the cylindrical 18650 design, reaching an energy content of around 5.3 kWh. Sixteen of these modules are built into one Model S battery pack to achieve a nominal energy of 85 kWh for the original battery pack.The main focus of the investigations was put on system level characterization and battery module design, rather than on cell modeling and simulation. Thus within the first step, several measurements were performed on module and on cell level. The data gives an insight into which amount of energy can actually be utilized on module level in comparison to the content that is theoretically available on cell level. In the next step the module was characterized in terms of its composition in volumetric and gravimetric manner. The acquired data can be used to identify the utilization of installation space, as well as for understanding the influence of the weight and volume of passive components like the cooling system or housing. These results will be compared to other state of the art battery systems from electric vehicles, which have been acquired in a different part of our ongoing research, giving an insight into the different approaches from different car manufacturers.
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