In the development of batteries for all-electric vehicles, thermodynamics, or thermal management, recently came to the fore. This is due to the fact that the common lithium-ion cells have to be operated in a narrow temperature window, and because the so-called fast charging mode in particular generates a great deal of heat. The very important charging time is therefore directly dependent on the performance of the cooling system. The experimental investigation of lithium-ion batteries is difficult because one is bound to the electrochemical processes, although they have no direct relevance in investigations on the subject of cooling. In addition, Li-ion batteries are extremely uncomfortable in the event of a fire, which requires considerable safety precautions. The aim of the T-Cell project is the development and production of a thermal dummy ('thermal cell') of a Li-ion cell, in which the generation of heat by heating elements is simulated. Such a dummy allows the controllable, reproducible and safe implementation of experimental investigations on the subject of battery cooling. The focus of the project is on the application at the module level, i.e. the combination of several cells. The processes inside the dummy are to be mapped by a simulation model that then specifies the setpoints for the housing temperature. The development of the model is a focus of the project. A thermal cell enables investigations of the heat dissipation on the housing of the cell. In this way, innovative cooling concepts at cell- and module level could be investigated Both the mechanical and electrical production of the dummy and the development of the simulation model represent a challenge that justifies a 'Sondierung'. If it is possible to prove that the concept of the thermal dummy and the associated measurement methodology works, the result of the exploration represents the starting point for a very useful method for the experimental investigation of the thermal management of batteries. The consortium consisting of the Institute for Internal Combustion Engines and Thermodynamics and the Institute of Electrical Measurement and Sensor Systems is an ideal prerequisite for a successful exploration.
|Effective start/end date||1/04/22 → 31/07/23|
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