Lead BMS/Wiring Harness

Cygni Energy; Hyderabad; On-site; INR 2,000,000 - 3,000,000; Full time

Job summary

Cygni Energy in Hyderabad seeks a Lead BMS/Wiring Harness engineer to design, validate and integrate Battery Management Systems for Li-ion packs and BESS. You will work across CAN/CAN-FD, Modbus, Ethernet and other protocols, defining requirements and safety assessments.

You will also lead harness design for HV/LV systems, develop DV/PV plans, and validate with external systems, ensuring compliance with safety standards. Strong experience in BMS architecture and HV wiring is essential.

Qualifications

• 8–10 years of experience in BMS design, software controls, hardware architecture, and validation.
• Experience with ISO 26262 and functional safety.
• Knowledge of wiring harness design for high voltage systems.

Responsibilities

• Develop, integrate and validate BMS for Li-ion packs and BESS systems.
• Define BMS requirements based on cell characteristics and system safety.
• Work on CAN/CAN-FD, Modbus, Ethernet and other protocols.
• Develop and maintain CAN database, communication matrix and diagnostics.
• Integrate BMS with inverter/PCS, charger, EMS and vehicle controller.
• Configure and validate BMS parameters, alarms and fault-handling strategies.
• Develop harness architecture, circuit diagrams, and pin-to-pin wiring.
• Ensure HV/LV segregation and proper creepage/clearance for HV systems.
• Review harness accessibility for assembly and service.

Skills

BMS Design

CAN/CAN-FD

Wiring Harness

HV/LV Safety

ISO 26262

Education

Bachelor's degree in Electrical Engineering / Electrical Electronics, Electronics Communication

Tools

CAN database (DBC)

Schematic capture

Job description

Job Summary

Position - Lead BMS/Wiring Harness _ Advanced BMS

Location: Hyderabad

Employment type - Full-Time

Position Reports to Head - NPD

Job Roles and Responsibilities

• Develop, integrate and validate Battery Management Systems (BMS) for Li-ion battery packs and BESS systems.
• Define BMS requirements based on cell characteristics, pack configuration, inverter/charger requirements and system safety requirements.
• Work on CAN/CAN-FD, Modbus, Ethernet and other communication protocols.
• Develop and maintain CAN database (DBC), communication matrix and diagnostic messages.
• Perform BMS integration with inverter/PCS, charger, EMS, vehicle controller and other external systems.
• Configure and validate BMS parameters, limits, alarms and fault-handling strategies.
• Perform cell balancing strategy development and validation.
• Analyze cell voltage, temperature, current and SOC data to identify battery performance and safety issues.
• Understanding of BMS hardware architecture and schematics.
• Develop BMS DV/PV test plans and test cases.
• Perform pack-level BMS validation under: Charge/discharge, Over-voltage, Under-voltage, Over-current, Short-circuit, Over-temperature, Under-temperature, Cell imbalance, Sensor failure, Communication failure, Contactor failure, Pre-charge failure.
• Knowledge of ISO 26262 and functional-safety concepts is preferred.
• Design LV and HV wiring harnesses for battery packs and BESS.
• Develop harness architecture, circuit diagrams, schematics, and pin-to-pin wiring.
• Integrate harnesses with battery modules, BMS, HV box, contactors, fuses, current sensors, and connectors.
• Ensure proper creepage and clearance for HV systems.
• Define HV/LV segregation and routing.
• Support battery-pack mechanical design to ensure adequate harness clearance and protection.
• Review harness accessibility for assembly and service.
• Design cell-voltage sensing and temperature-sensing harnesses.
• Perform fault injection and boundary-condition testing.
• Analyze CAN logs and battery test data.
• Support battery certification and customer validation activities.

Educational Qualifications Requirements

• Bachelor s degree in Electrical Engineering / Electrical Electronics, Electronics Communication
• Must have 8 - 10 Years experience in design, BMS Software Controls, BMS hardware architecture and schematics, Testing Validation, Knowledge of ISO 26262 and functional-safety

Disclaimer: This job posting has been aggregated from external source. Role details, content, and availability are subject to change. Applicants are advised to confirm the latest information directly on the company website before applying.