Independent Research — Battery State Estimation
06/2025 - Present | Wertingen, Germany
Self-directed R&D on compact neural battery surrogate models for dynamic operation, with emphasis on scalable data infrastructure and long-horizon validation.
- Built a terabyte-scale, schema-driven battery-data pipeline for heterogeneous cycling data, covering sharded parquet storage, data lineage, reproducible preprocessing, and streaming/memory-mapped training access.
- Developed scalable visualization and downsampling tools for inspecting dataset quality and long-horizon model rollouts across millions to billions of samples.
- Created reproducible training workflows with config-driven experiments, Optuna/W&B-based HPO, checkpoint comparison, and experiment tracking.
- Exposed profile memorization in repetitive cycling datasets and shifted validation toward randomized synthetic profiles, OOD discharge extensions, and broader real-data diversity.
- Prototyped compact state-space/attention battery surrogate models for metadata- and control-conditioned dynamic rollouts, identifying data diversity as the limiting factor for robust generalization.
Battery Machine Learning Consulting 11/2024 - 05/2025 | Chemix Inc | Remote / Sunnyvale, USA
Contributed to a Silicon Valley battery startup's ML stack in a fast-moving production codebase.
- Introduced reproducible HPO workflows with custom sweep tracking (W&B) that found a model with 10× fewer parameters and better validation loss than the baseline, while preserving checkpoint compatibility.
- Reproduced standardized cycling protocols in PyBaMM to generate long-horizon synthetic data aligned with physical test-cycler results for model validation.
- Operated as a remote external contractor, aligning scope with the in-house team, contributing design reviews, and supporting async implementation cycles across time zones.
Battery Machine Learning Open Source Cell-Li-Gent 04/2024 - 10/2024 | Wertingen, Germany
Scaled thesis-stage SoC estimation into a multi-output battery model for terminal voltage, surface/core temperature, and OCV on synthetic SPMe data.
- Refined a vanilla GPT-style baseline into a roughly 16M-parameter domain-specific Transformer through HPO, enabling practical autoregressive rollouts.
- Created a synthetic SPMe pipeline with randomized profiles, datasheet limits, and thermal signals.
Solo Motorbike Travel | 10/2023 - 03/2024 | Vietnam
Master Thesis and Research Internship 06/2022 - 09/2023 | Fraunhofer ISE | Freiburg i.Br., Germany
Self-proposed thesis on data-driven SoC estimation across NMC/64Ah and LFP/2.6Ah cells using synthetic ECM data, transfer learning, and meta-learning.
- Benchmarked tree-based, recurrent, convolutional, state-space, and Transformer models under matched HPO budgets, finding Transformers strongest among neural models for transfer while tuned ECMs remained the accuracy baseline.
- Preceding internship: recurrent architectures including stacked LSTM, Grid-LSTM, and bidirectional Grid-LSTM for battery state estimation.
Embedded Machine Learning Internship 06/2021 - 05/2022 | Telocate GmbH | Freiburg i.Br., Germany
End-to-end AI smart-glove prototype for real-time object-presence detection.
- Designed a four-channel acquisition PCB and implemented the VHDL FPGA data path, converting conditioned parallel SPI sensor streams into a real-time-capable UART interface.
- Benchmarked multivariate time-series classifiers, including MultiRocket and InceptionTime, against an MLP baseline for binary object-presence detection, achieving near-perfect accuracy on a small held-out trial set.
M.Sc. Embedded Systems Engineering 11/2020 - 09/2023 | University of Freiburg | Freiburg i.Br., Germany
Hands-on microcontroller lab work combined with sensing, modelling, and AI.
Work and Travel | 10/2018 - 10/2020 | Asia-Pacific and Australia (licensed electrical work)
Battery Engineer, Full-Time 04/2017 - 09/2018 | Mahle GmbH | Stuttgart, Germany
Owned electrical-interface design for a high-voltage immersion-cooled battery prototype, an 800V/750kW pack design, across internal cross-functional stakeholders, suppliers, and OEM reviews.
- Coordinated electrical integration from module prototype to full-pack design, covering BMS sensing, connectors, protection, and HV safety under automotive functional-safety constraints.
- Named inventor on patent publications US20200153060 and US20200119415 related to the battery system work.
- Developed transient electro-thermal busbar simulation to evaluate hotspot formation during rapid design iterations.
Bachelor Thesis and Hardware Internship 04/2016 - 03/2017 | Mahle GmbH | Stuttgart, Germany
Modeled a 14V vehicle electrical network to evaluate integration of a thermoelectric waste-heat recovery system and bidirectional DC/DC converter.
- Created and validated onboard network simulations covering TEG, DC/DC, alternator, battery, and loads, and assessed recuperation states.
- Supported hardware bring-up through soldering, driver and sensor testing, SPICE fault analysis, and thermal test-bench measurements.
B.Eng. Mechatronics 10/2012 - 03/2017 | Ulm University of Applied Sciences | Ulm, Germany
Developed a stronger focus on embedded systems and simulation.
Electrician and Mechatronics Apprenticeship 08/2008 - 09/2015 | Osram AG | Augsburg, Germany
Returned during university for production-line electrical work, covering switchboard wiring, high-power cabling, fault tracing, and small-team coordination under deadline pressure.