Job Description: Lead OR Sr. Design Engineer - HVBMS
Role Summary
The HVBMS Design Engineer will be responsible for architecting, developing, and validating high-voltage battery management systems (400V–1500V) for advanced energy storage and electrification platforms. This role demands mastery of circuit design, embedded control, functional safety, and system integration, with a strong emphasis on technical excellence and compliance.
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Core Responsibilities
· System Architecture
o Define HVBMS topology, sensing, isolation, and protection strategies for large-format Li-ion packs.
o Develop redundancy and fail-protected mechanisms aligned with ISO 26262 ASIL-D requirements.
o Architect communication interfaces (CAN FD, Ethernet, ISO 15118) for seamless integration with vehicle/grid controllers.
· Hardware Design
o Design precision measurement circuits for voltage, current, and temperature sensing with high CMRR and isolation.
o Develop balancing circuits (active/passive) optimized for efficiency and thermal performance.
o Specify high-voltage contactors, pre-charge circuits,



and solid-state switching elements.
· Software & Algorithms
o Implement SOC, SOH, SOP estimation using Kalman filters, neural networks, or equivalent advanced methods.
o Develop real-time fault detection and diagnostic algorithms for over-voltage, over-current, thermal runaway, and isolation faults.
o Ensure compliance with cybersecurity standards (ISO/SAE 21434), and real-time OS constraints.
· Validation & Testing
o Conduct HIL/SIL simulations for algorithm robustness and edge-case scenarios.
o EMC/EMI compliance validation.
o Lead FMEA, FTA, and DFMEA processes for risk mitigation.
· Cross-disciplinary Integration
o Collaborate with mechanical engineers on pack enclosure, cooling, and vibration isolation.
o Interface with inverter and charger teams to ensure seamless HV system operation.
o Provide technical documentation for certification bodies and customer audits.
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Required Qualifications
· M

📌 Sr. Design Engineer-HVBMS (Bengaluru)
🏢 LT-Larsen & Toubro
📍 Bengaluru