Below are the updates per work package (WP) that have been performed during the first 18 months of the project. For this, only technical WP achievements are considered.
WP2: In this WP, the requirements and specifications are defined and delivered to all the technical WPs. This includes the development of models and algorithms in WP3/WP4, hardware and software advancements in WP5/WP6, and the testing and validation activities in WP7. The resulting documents provide a detailed description of the specifications for the various hardware and software solutions, their capabilities, and the required testing procedures.
WP3: The pseudo-2D (P2D) battery ageing model is achieved by incorporating and determining the model parameters. The specific cell parameters are determined for the NEMO cell. For the SoC estimator, the cells were cycled, EIS was carried out, using the distribution of relaxation time allowing calibration of the model parameters. For the SoT, an EIS-based model was put in place and validated against several temperature points. For the MSM, cells were characterized under various preload force conditions and cycling profiles. The thickness change of cells is simulated based on an electrode swelling algorithm. In another task, the first version of the SoC algorithm is running in the TTTECH cloud, the algorithm was coded in C.
WP4: A detailed literature study is performed to identify the advanced data-driven modeling techniques motivated by large language models. The first trial is made with MOIRAI. The partners have worked extensively to set a common framework for data format, automatic data upload structure, etc. Research is performed to define the SoS parameters and safety-relevant thresholds. Mechanical abuse tests are performed deforming the cell in the centre at quasi-static conditions.
WP5: The single-cell sensing boards are developed for the BMS. The layout of the single-cell sensing board was designed and adjusted for the NEMO cell. 24 PCBs were populated, tested, and supplied by conducting functional testing on each single cell board. Cell-based EIS boards were integrated between the cell tabs. The cell-active balancing boards are also designed and ordered. Two demonstrator HV battery systems were developed. The development of the zBMS+ prototypes is also finished, parts are ordered and the manufacture is planned for 2025.
WP6: The development of the BMS driver and data handling firmware has been completed developing the firmware and software for the master boards. The software stack has been successfully deployed. The cloud-related software development has progressed, setting up the infrastructure and implementing data processing capabilities. There is progress on model and algorithm integration; the SoC algorithm was deployed, Aurix TC4 evaluation boards were provided, and packaging possibilities for physics-based models are studied including model integration in the software architecture.
WP7: Testing activities on the cell level and on the system level serve as the basis for the model validation and demonstration of the defined KPIs. Cycling activities on the prototypes are ongoing and the hardware is commissioned. The testing activities on the cell level have started for the model development.
