Technical Lead - Battery Pack Design (BESS)

Larsen & Toubro; Bengaluru; On-site; INR 4,000,000 - 7,000,000; Full time

Job summary

Larsen & Toubro seeks a Battery Pack Design Lead to spearhead the design, development, and integration of advanced battery pack systems for BESS. The role requires leadership across mechanical, electrical, and thermal disciplines to ensure safety and scalable solutions for utility-scale and commercial projects.

Responsibilities include leading end-to-end pack design, defining architecture and enclosure details, and guiding cross-functional teams through validation, testing, and supplier

Qualifications

• Bachelor’s/Master’s/PhD in engineering or related field.
• 10+ years in battery pack/rack design for energy storage or EVs.
• Proficient in CAD tools: SolidWorks, CATIA, Creo.
• Experience with safety standards and BESS/cower related certification processes.

Responsibilities

• Lead end-to-end design of battery packs for BESS applications (mechanical, electrical, thermal).
• Define architecture, module configuration and enclosure design considering safety and reliability.
• Oversee prototype builds, validation testing, and qualification processes.

Skills

CAD tools

Thermal management

Structural design

Electrical integration

Education

Bachelor’s/Master’s/PhD in Mechanical or Electrical Engineering or Battery-related field

Tools

SolidWorks

CATIA

Creo

Job description

Role Overview

We are seeking a highly skilled Battery Pack Design Lead to spearhead the design, development, and integration of advanced battery pack and rack systems for Battery Energy Storage Systems (BESS). The ideal candidate will combine deep technical expertise in electro-mechanical design with leadership skills to drive innovation, ensure safety, and deliver scalable solutions for utility-scale and commercial energy storage projects.

Design & Development

• Lead the end‑to‑end design of battery modules and packs for BESS applications, including mechanical, electrical, and thermal aspects.
• Define architecture, module configuration, and enclosure design ensuring compliance with safety, performance, and reliability standards.
• Develop CAD models, drawings, and BOMs for pack/rack assemblies.

Technical Leadership

• Guide cross‑functional teams (mechanical, electrical, thermal, controls) in design reviews and decision‑making.
• Establish design standards, best practices, and validation protocols.
• Mentor junior engineers and foster a culture of innovation and collaboration.

Safety & Compliance

• Ensure designs meet international standards (UL, IEC, IEEE, NFPA, etc.) IEC 62619, UL 1973, UN 38.3, IEC 62620, IEC 61000, IEC 60529, QM 333, IATF 16949, ISO standards for electrical safety, fire protection, and mechanical integrity.
• Integrate safety features such as thermal runaway mitigation, fault isolation, and protective housings.

Integration & Testing

• Collaborate with system engineers to integrate packs into overall BESS solutions.
• Oversee prototype builds, validation testing, and qualification processes.
• Troubleshoot design issues and implement corrective actions.

Project Management

• Manage design timelines, deliverables, and resource allocation.
• Coordinate with suppliers and manufacturing partners for component sourcing and production readiness.
• Support cost optimization and scalability for mass deployment.

Knowledge & Vendor Engagement

• Knowledge and connect with the relevant vendors and subcontractors for all the design support activities such as mechanical fabrication, Laser welding etc.

Required Qualifications

• Bachelor’s / Master’s/ PhD degree in Mechanical Engineering, Electrical Engineering, Battery Chemistry or related field.
• 10+ years of experience in battery pack/rack design, preferably in energy storage or EV applications.
• Strong expertise in:
• CAD tools (SolidWorks, CATIA, Creo, etc.)
• Thermal management systems (air/liquid cooling)
• Structural design and materials selection
• Electrical integration (busbars, connectors, fuses, BMS interfaces)
• Proven track record of leading design teams and delivering complex projects.
• Knowledge of industry standards and certification processes for BESS.