Senior Battery Electrical Engineer

Il y a 7 jours

IvrysurSeine, Île-de-France Gama Temps plein 75 000 € - 110 000 € Contrat

Job Description

To pursue our ambitious vision, we are looking for a Senior Battery Electrical Engineer. In this role, you will design the battery system at the heart of a satellite power system — from cell selection to a flight‑ready battery board and its BMS.

Your Mission Will Be To

  • Design and bring up the battery pack electronics: high‑current board design, instrumentation, interconnects, wiring, and battery‑side protections.
  • Define the BMS architecture and design its hardware: monitoring, balancing and protection circuits, and interfaces with the power converter.
  • Develop the BMS software functions: state estimation (SoC/SoH), balancing and protection logic, and battery charging strategies (CC/CV profiles, current/voltage limits over temperature and state of charge).
  • Define and run test campaigns for cells, packs, and the BMS subsystem: cell screening and characterization, cycling and aging in the in‑house cell testing laboratory, and functional validation of the BMS (protections, balancing, state estimation) on the battery board.
  • Select and qualify cells and battery components for the LEO environment including battery cells supplier selection: qualification testing (thermal‑vacuum, radiation), derating analysis, and incoming inspection.

Requirements

  • Professional engineering education (MSc or equivalent) in electrical engineering / electronics, with 5+ years of hands‑on experience in battery systems or power electronics.
  • Solid understanding of Li‑ion cell behavior from an electrical standpoint: electrical characteristics, aging mechanisms, safety, and their implications for pack design.
  • Experience with BMS architectures: cell monitoring, balancing, and protection circuits.
  • Strong electronics design skills: high‑current PCB design (heavy copper, busbars, creepage/clearance), sensing chains, protections.
  • Hands‑on cell and battery testing experience: cyclers, thermal chambers, test protocol definition.
  • Autonomy in the lab: oscilloscopes, differential/isolated probes, power analyzers, electronic loads.
  • Strong analytical skills, a proactive attitude, excellent interpersonal skills and unbounded curiosity.
  • You enjoy owning your scope end‑to‑end.
  • Professional level English — further languages welcome.

Nice To Have

  • Experience in space, automotive, aerospace, or other high‑reliability industries.
  • Programming skills for BMS function implementation (embedded C or similar): state estimation, protection logic, charging strategies.
  • Familiarity with electrochemical characterization methods: ACIR/DCIR, EIS, RPT‑based protocols.
  • Familiarity with power conversion and battery charging strategies (CC/CV profiles).