Thermo-electrical battery test stand

热电电池试验台

• 批准号: 448337059
• 金额: --
• 依托单位: Universität Bayreuth
• 依托单位国家: 德国
• 项目类别: Major Research Instrumentation
• 财政年份: 2020
• 资助国家: 德国
• 起止时间: 2019-12-31 至 无数据
• 项目状态: 未结题
• 来源: https://gepris.dfg.de/gepris/projekt/448337059?language=en
• 关键词: Thermo; electrical; battery; test; stand

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.

电池、燃料电池和氧化还原液流电池的研究型测试以及伴随其开发的测试通常在电池级和系统级（串并联或堆栈）上独立进行。因此，在电池操作期间不可能分离电池之间的变化和不均匀性的影响。该项目的目标是分析单个电池和模块的电化学和电热行为以及退化行为，从而识别和量化由于不均匀操作而产生的统计效应和放大效应。必要的先决条件是将电池级（6 V 通道）测试与模块级（60 V 通道）测试紧密结合。该耦合结合了所施加的电流分布、截止限制（电压限制）、被测设备整个生命周期内负载分布的适应（改变的容量和功率能力）、时间同步（例如相同的休息时间、用于参考测试的相同的测试中断）以及气候室中的相同的温度分布。以上都是目标分析的关键测试条件。在所提议的测试设置中，必要的耦合将通过包含系统的控制软件来保证，该软件允许对所有测试通道和电压电平的测试周期进行编程。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，首先基于试点电池的耦合使用，其次基于嵌入式数字孪生。在第一种情况下，对试点小区进行详细诊断。在线获得的结果用于电池模块充电电流的降额。在第二种情况下，有关单个电池电化学行为的基于模型的信息通过软件在环实时合并到充电控制的反馈控制环路中。