Jacques Thomazo
Battery Systems & Data Platform Technical Lead
- jacques.thomazo@gmail.com
- Poitiers, Nouvelle-Aquitaine, FR
- LinkedIn / jacques-thomazo-battery
- GitHub / JayTeeBat
15+ years of experience from cell chemistry to connected-fleet diagnostics. I design and build the telemetry, diagnostic and engineering-data systems that turn vehicle data into battery decisions.
Core Engineering Capabilities
- Battery system design
- Requirements & duty-cycle analysis · System sizing · Ragone analysis · Cell selection · Series/parallel architecture
- Battery modelling & analytics
- SOH estimation & prediction · Energy management strategies · Power/energy simulation · MATLAB/Simulink/Simscape · Python
- Vehicle diagnostics & IoT
- CAN · ISO-TP · UDS · OBD-II · J1939 · DID/DTC · Gateway configuration · Telemetry pipelines
- Backend platforms & software delivery
- Python · FastAPI · Pydantic/OpenAPI · REST/WebSocket APIs · MongoDB · Docker/Linux · Versioned schemas · Testing & CI/CD
Professional Experience
Forsee Power
Nov 2020 – PresentSenior Battery Data Scientist
May 2024 – PresentBuild an IoT telemetry service and data platform end-to-end.
- Automate remote diagnostic reporting for telemetry-equipped vehicles, cutting per-report turnaround from 1 day to 200 seconds and cost from €1,000 to €0.50.
- Build the IoT backend in Python and FastAPI: REST and WebSocket APIs, Pydantic/OpenAPI models, MongoDB persistence, and resilient external API integrations.
- Define CAN diagnostic strategy (UDS, J1939, OBD-II, DID/DTC) and configure gateways for 100 vehicles across 8 customers, 7 products and 2 generations.
- Architect and deliver a versioned, multi-repository IoT platform as the primary developer in a two-person team, using CI-gated AI workflows to preserve service compatibility and software quality.
Technical Lead — Battery System Development
Nov 2020 – May 2024- Reworked SOH estimation and prediction algorithms for the embedded application, bringing accuracy to ±3 %.
- Built a hybrid fuel-cell battery system model to explore optimised energy management strategies (MATLAB/Simulink/Simscape, Git).
- Led development of a next-generation, high-cell-integration-density battery platform (cell-to-pack mass ratio >80 %).
- Delivered five in-house manufactured prototype packs (17 kWh, 800 V, LTO) for a key railway project.
McLaren Applied
Aug 2019 – Aug 2020Principal Engineer — Battery Systems
Technical lead on a top-tier, high-performance racing EV battery concept.
- Simulated and optimised battery system sizing against tender requirements — 43 kWh, 600 kW, 284 kg, 220 L, 800 V.
- Defined, tracked and analysed results of a cell performance test plan.
ARRIVAL
Jan 2018 – Jul 2019Functional Safety Manager
Aug 2018 – Jul 2019Led ISO 26262 functional safety analysis and implementation (HARA, FMEA) across HV battery (ASIL C), steer-by-wire and brake-by-wire products (both ASIL D).
Lead Battery Engineer
Jan 2018 – Aug 2018Owned the development lifecycle for HV & LV batteries, PCBs and electrical systems: requirements, concepts, design reviews, testing and validation. Modular 2 kWh, 400 V architecture.
Vantage Power
Jul 2015 – Dec 2017Senior Battery Engineer
Jul 2017 – Dec 2017Implemented a long-term (6 months) cell-level test bench (0–5 V and 25 A/channel × 16 channels) for performance and durability testing, from specifications through to continuous data monitoring pipelines.
Battery Engineer
Jul 2015 – Jun 2017Multidisciplinary battery engineer working across HV component sizing and selection (600 V architecture), small-batch production (4 × 15 kWh battery systems), 3D prototyping (10-part batch of PETG PDU enclosures) and cooling-system simulation (dual 15 kWh pack system, immersion cooling).
Renault
Apr 2011 – Jun 2015Li-ion Battery Specialist Engineer
Built, led and owned battery safety validation (mechanical, thermal, electrical) for hybrid and electric vehicle battery systems, from 48 to 400 V — projects: Twizy, Fluence, Kangoo, ZOE Gen 1 & 2, 48 V LTO mild-hybrid battery.
Education
Languages
- French
- Native
- English
- Fluent (5 years in the UK)