Senior Design Engineer – Thermal & Cooling Systems (BESS)
Location: Bengaluru, India
Experience: 8–12 Years
Function: BESS Product Engineering – Thermal Systems
About the Role
We are looking for a Senior Design Engineer – Thermal & Cooling Systems to design, develop, and validate thermal management solutions for utility?scale and commercial & industrial (C&I;) Battery Energy Storage Systems (BESS). He will be Part of BESS system Engineer and responsible for designing and optimizing the thermal management systems.
This role focuses on end?to?end thermal system design, Heat Loss Calculation, ensuring secure operation, high reliability, optimal battery life, and compliance with stationary energy storage requirements. You will work closely with battery, enclosure, CFD, electrical, and system teams to deliver robust cooling architectures suitable for long?duration, high?power stationary storage applications.
Key Responsibilities
Thermal Architecture & System Design
- Design and own thermal management architectures for battery racks, modules, and containers.
- Heat Loss Calculation




- Define cooling strategies for utility?scale and C&I; BESS, considering:
- Environmental extremes
- Long?duration operation
- Maintainability and serviceability
- System Design & Sizing: Design HVAC or liquid cooling systems tailored for BESS, including heat load calculations, system sizing, and equipment selection.
- Select and size thermal components including:
- Air and/or liquid cooling systems
- Heat exchangers, chillers, pumps, fans, ducting
- Develop thermal concepts aligned with system cost, reliability, and scalability goals.
- Hands on Experience with Simulations tools like ANSYS / SIMcenter etc..

Battery Thermal Management
- Ensure battery operation within defined thermal limits for:
- Safety
- Performance
- Cycle and calendar life
- Define thermal interfaces between:
- Battery cells/modules
- Cooling systems
- Mechanical enclosures
- Support thermal derating strategies in coordination

📌 Senior Thermal and Cooling Designer BESS (Bengaluru)
🏢 LT-Larsen & Toubro
📍 Bengaluru