Cell-to-Pack (CTP) Design Engineer – Utility-Scale BESS
Role Summary
The Cell-to-Pack (CTP) Design Lead for Utility BESS is responsible for leading the design, architecture, and engineering of battery modules, sub-packs, racks, and container-level pack integration. The role ensures optimal energy density, thermal safety, mechanical robustness, manufacturability, and compliance with global standards. This leader works across electrochemistry, thermal, mechanical, electrical, and controls engineering teams to deliver protected, scalable, and cost-optimized BESS battery packs for grid applications.
Key Responsibilities
Define end-to-end CTP architecture for utility-scale BESS (cell → module → unit → rack → container). Lead selection of cylindrical, prismatic, or pouch cell platforms based on application: frequency response, energy shifting, and hybrid storage. Determine series/parallel cell configurations, voltage windows, SOC/SOH limits, and pack topology. Develop modular, scalable pack/rack designs compatible with PCS, EMS, and container infrastructure. Optimize energy density,



footprint, weight, and structural stability. Lead mechanical layout of modules, frames, busbars, holders, and pack enclosure. Conduct structural strength and vibration analysis (simulation + validation). Ensure tolerance stack-ups, manufacturability, and assembly feasibility. Design load-bearing frames supporting seismic, transport, lifting, and shock requirements as per relevant standards Collaborate with thermal engineering to define cooling strategy: Air-cooled, liquid-cooled, or hybrid CTP approaches. Ensure cell temperature uniformity, cooling channel placement, and thermal runaway (TR) mitigation. Drive venting paths, exhaust channels, gas detection, and propagation prevention mechanisms. Integrate sensors (NTC/PTC, pressure, humidity) into pack design. Define electrical layout, voltage isolation, creepage/clearance, fuse/circuit protection, HV harnessing, and contactor block integration. Col

📌 Battery Pack Design Engineer (Bengaluru)
🏢 Larsen and Toubro
📍 Bengaluru