Role Summary
The Sr Mechanical Design engineer for BESS is responsible for leading the mechanical architecture, design, analysis, validation, and industrialization of battery racks, enclosures, containers, cooling interfaces, structural frames, and auxiliary mechanical systems used in large-scale energy storage systems. The role ensures structural integrity, manufacturability, thermal compatibility, fire safety, and compliance with global BESS standards. It involves cross-functional leadership across thermal, electrical, safety, and system engineering teams.
Key Responsibilities
- Lead mechanical architecture for utility-scale BESS platforms:
- Battery modules, racks & sub-racks, Enclosures & container structures
- LV/HV panels & wiring harness routing, Cooling ducting & air/liquid flow paths
- Define form factor, layout, and assembly strategy for modular & containerized BESS.
- Balance performance, safety, manufacturability, and cost.
- Review and approve 3D drawing and 2D fabrication drawings
- Create and maintain mechanical BoM, materials selection,



and finishing/coating requirements (C5-M/anti-corrosion). Perform detailed mechanical design for metal structures, welded frames, sheet-metal parts, brackets, and enclosure assemblies.
- Lead structural FEA for static, energetic, vibration, fatigue, seismic, and transportation loads.
- Ensure compliance with global mechanical standards
- Validate lifting points, load paths, shock resistance, and mechanical clearances.
- Collaborate with thermal engineering to integrate HVAC / liquid cooling, Duct routing, Heat exchangers, Sensor placement, Venting & airflow optimization
- Work with electrical teams to ensure proper placement of HV/LV cabinets, busbars, grounding points, and cable trays.
- Integrate fire detection, suppression, and venting mechanisms (e.g., FACP, smoke ducts, deflagration panels).
- Ensure compliance with UL 9540A mechanical and venting requirements.
- Lead prototype builds for racks and container system

📌 Senior Mechanical Design Engineer BESS (Bengaluru)
🏢 LT-Larsen & Toubro
📍 Bengaluru