: 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.
- Solid 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.

📌 Sr. Design Engineer-HVBMS (Bengaluru)
🏢 Larsen u0026 Toubro
📍 Bengaluru