# Jacques Thomazo

Battery Systems & Data Platform Technical Lead

jacques.thomazo@gmail.com · Poitiers, Nouvelle-Aquitaine, FR · https://www.linkedin.com/in/jacques-thomazo-battery/ · https://github.com/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 – Present)

Chasseneuil-du-Poitou, Nouvelle-Aquitaine, France

#### Senior Battery Data Scientist (May 2024 – Present)

Build 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.

### Principal Engineer — Battery Systems — McLaren Applied (Aug 2019 – Aug 2020)

Woking, United Kingdom

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 2019)

London, United Kingdom

#### Functional Safety Manager (Aug 2018 – Jul 2019)

Led 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 2018)

Owned 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 2017)

Greenford, Greater London, United Kingdom

#### Senior Battery Engineer (Jul 2017 – Dec 2017)

Implemented 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 2017)

Multidisciplinary 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).

### Li-ion Battery Specialist Engineer — Renault (Apr 2011 – Jun 2015)

Guyancourt, France

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

- **École Nationale Supérieure de Chimie de Paris (Chimie ParisTech)** — French Engineering Diploma (Diplôme d’Ingénieur), Renewable Energy, Chemistry, Electrochemistry, Physical Chemistry and Semiconductors (2007 – 2010)

## Languages

- **French**: Native
- **English**: Fluent (5 years in the UK)

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short cut · 2026.07.20+gfde30c7 · latest at https://jayteebat.github.io/my-resume/ · resume-as-code: https://github.com/JayTeeBat/my-resume