BATTERY MANAGEMENT SYSTEM ENGINEER

Position: Senior BMS Engineer

Experience: 10+ Years

Location: Chennai

Department: Engineering / R&D

Employment Type: Full-time

Senior BMS Engineer

Key Responsibilities:

1. BMS Architecture & Design

• Lead the design and development of BMS architecture for Lithium-ion battery packs (EV, ESS, Industrial). 
• Define hardware, software, and control strategies for cell monitoring, protection, and system-level operations. 
• Work on system modeling, SOC, SOH, SOP estimation algorithms. 

2. Algorithm Development

• Develop and optimize algorithms including: 
• State of Charge (SOC) estimation 
• State of Health (SOH) estimation 
• Cell balancing (active/passive) 
• Thermal management 
• Fault detection & diagnostics 
• Validate algorithms using lab data, simulations, and real-time test cases. 

3. Hardware & Firmware Integration

• Collaborate with hardware engineers to finalize PCB schematics, component selection, and hardware specifications. 
• Integrate firmware with BMS hardware modules and ensure stable communication across the system. 
• Work with microcontrollers, ADCs, memory modules, and gate drivers used in BMS systems. 

4. Communication Protocols

• Implement and validate communication interfaces: 
• CAN, CANOpen, J1939 
• Modbus, RS485 
• UART, SPI, I2C 
• Work with cloud and gateway integration for remote diagnostics (optional). 

5. Testing & Validation

• Develop validation plans for BMS functionality and reliability testing. 
• Work with battery cyclers, load banks, thermal chambers, and HIL setups. 
• Analyze test results and troubleshoot cell/battery behavior, hardware anomalies, and firmware issues. 

6. Safety & Compliance

• Ensure compliance with global standards: 
• IEC 62619, UL 1973, UL 2580 
• ISO 26262 (Functional Safety) 
• Conduct FMEA/SFMEA, hazard analysis, and safety reviews. 

7. Documentation & Collaboration

• Prepare technical documentation, system specifications, and test reports. 
• Work cross-functionally with product, hardware, firmware, and QA teams. 
• Support production teams during prototype build, testing, and certification. 

Required Skills & Experience:

• 10+ years of hands-on experience in BMS development for Lithium-ion batteries. 
• Strong knowledge of Li-ion cell chemistry, battery pack design, and safety mechanisms. 
• Expertise in C/C++ embedded programming and real-time systems. 
• Advanced experience in SOC/SOH algorithm development and validation. 
• Strong understanding of analog and digital electronics. 
• Proficiency with battery testing tools and cyclers. 
• Experience with modeling tools like MATLAB/Simulink (preferred). 
• Strong analytical and problem-solving skills. 

Preferred Qualifications:

• Master’s or Bachelor’s degree in Electrical Engineering, Electronics, Embedded Systems, Energy Engineering, or related field. 
• Experience in Energy Storage Systems (ESS), EV battery packs, or hybrid applications. 
• Experience with cloud connectivity and IoT-based battery monitoring. 
• Experience leading engineering teams or projects. 

If interested, share your CV to indhira.d@aeternusenergy.com