Thermo-electrical battery test stand

电池、燃料电池和氧化还原液流电池的面向研究的测试以及伴随其开发的测试通常在电池级别和系统级别(串-并连接或堆叠)独立进行。因此，不可能在细胞运行期间分离细胞间的变异和不均质性的影响。拟议项目的目标是分析单个电池和组件的电化学和电热行为以及退化行为，以便确定和量化由于不均匀操作而产生的统计效应和放大效应。必要的前提是单元级(6 V通道)测试与模块级(60 V通道)测试紧密结合。该联轴器包括施加的电流分布、截止限值(电压限制)、在被测试设备的整个寿命期间对负载分布的适应(改变的容量和功率能力)、时间同步(例如，相同的休息期、用于参考测试的相同的测试中断)以及气候室内的相同的温度分布。所有这些都是进行目标分析的关键测试条件。在拟议的测试设置中，必要的耦合将由一个包含系统的控制软件保证，该软件允许在所有测试通道和电压电平上编程测试周期。电池测试台的第二个目标是实现电池模块的老化最小快速充电控制，首先，基于Pilot电池的结合使用，其次，基于嵌入式数字孪生电池。在第一种情况下，试点细胞经历了详细的诊断。在线获得的结果被用于降低电池模块的充电电流。在第二种情况下，关于单个电池的电化学行为的基于模型的信息通过回路中软件被实时合并到充电控制的反馈控制回路中。

Research oriented tests of batteries, fuel cells and redox flow batteries and those tests accompanying their development are typically conducted independently on cell level and on system level (serial-parallel connection or stack). Thus, a separation of cell-to-cell variation and effects of inhomogeneities during operation of cells are not possible. Goal of the proposed project is to analyse the electrochemical and electro-thermal behaviour as well as the degradation behaviour of single cells and modules such that both the statistical effects and the amplifying effects due to the inhomogeneous operation are identified and quantified. Necessary prerequisite is a tight coupling of tests on cell level (6 V channels) with tests on module level (60 V channels). The coupling incorporates the applied current profiles, the cut-off limits (voltage limitations), the adaption of load profiles over the life time of the devices under test (changed capacities and power capabilities), time synchronisation (e.g. same rest periods, same test interrupts for reference tests) as well as same temperature profiles in a climate chamber. All of the above are crucial test conditions for the targeted analysis. The necessary coupling will be guaranteed in the proposed test setup by a system-encompassing control software that allows a programming of test cycles across all test channels and voltage levels. The second goal of the batter test stand is the realisation of an aging minimal fast charging control of battery modules based, first, on a coupled usage of pilot cell and, second, on an embedded digital twin. In the first case, the pilot cell undergoes a detail diagnosis. The results gained online are utilized for a derating of the charging current of the battery module. In the second case, model-based information on the electrochemical behaviour of a single cell is incorporated via software-in-the-loop into the feed-back control loop of the charge control in real time.