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Sr. Design Engineer-HVBMS

Larsen & Toubro · Posted today

  • Bengaluru, Karnataka, India (On-site)
  • Full-time
  • 5+ yrs

About the role

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.

Core Responsibilities

  • System Architecture
  • Define HVBMS topology, sensing, isolation, and protection strategies for large-format Li-ion packs.
  • Develop redundancy and fail-safe mechanisms aligned with ISO 26262 ASIL-D requirements.
  • Architect communication interfaces (CAN FD, Ethernet, ISO 15118) for seamless integration with vehicle/grid controllers.
  • Hardware Design
  • Design precision measurement circuits for voltage, current, and temperature sensing with high CMRR and isolation.
  • Develop balancing circuits (active/passive) optimized for efficiency and thermal performance.
  • Specify high-voltage contactors, pre-charge circuits, and solid-state switching elements.
  • Software & Algorithms
  • Implement SOC, SOH, SOP estimation using Kalman filters, neural networks, or equivalent advanced methods.
  • Develop real-time fault detection and diagnostic algorithms for over-voltage, over-current, thermal runaway, and isolation faults.
  • Ensure compliance with cybersecurity standards (ISO/SAE 21434), and real-time OS constraints.
  • Validation & Testing
  • Conduct HIL/SIL simulations for algorithm robustness and edge-case scenarios.
  • EMC/EMI compliance validation.
  • Lead FMEA, FTA, and DFMEA processes for risk mitigation.
  • Cross-disciplinary Integration
  • Collaborate with mechanical engineers on pack enclosure, cooling, and vibration isolation.
  • Interface with inverter and charger teams to ensure seamless HV system operation.
  • Provide technical documentation for certification bodies and customer audits.

Required Qualifications

  • Master’s/PhD in Electrical Engineering, Power Electronics, or Control Systems.
  • 5+ years of hands-on experience in HVBMS design and validation.
  • Expertise in Li-ion chemistries (NMC, LFP, solid-state) and degradation modelling.
  • Strong command of embedded C/C++, MATLAB/Simulink, and model-based design workflows.
  • Proven track record with ISO 26262, IEC 61508, UL 2580, SAE J2464 compliance projects.
  • Preferred Expertise
  • Knowledge of advanced balancing (bi-directional active balancing, switched capacitor).
  • Familiarity with CFD-based thermal modelling for battery packs.
  • Hands-on experience with PCB design (Altium), circuit simulation (PSpice), and CAN tools (CANalyzer, Vector).
  • Key Attributes
  • Precision-driven, safety-first mindset.
  • Ability to synthesize complex technical requirements into robust designs.
  • Strong analytical and documentation skills for technical audiences.
  • Innovative thinker with a focus on reliability and scalability.

Skills

System architectureEmbedded controlFunctional safetyCommunication interfaces (CAN FD, Ethernet, ISO 15118)High-voltage battery management systems designPrecision measurement circuitsBalancing circuitsHigh-voltage contactors and pre-charge circuitsSOC, SOH, SOP estimation using Kalman filters, neural networksReal-time fault detection and diagnostic algorithmsCybersecurity standards (ISO/SAE 21434), real-time OS constraints
Sr. Design Engineer-HVBMS at Larsen & Toubro, Bengaluru, Karnataka, India (On-site) | Quark9