Battery Management Systems Engineer

2 weeks ago


Bengaluru, India SINA Mobility Full time

About the Role: We are building a next-generation electric vehicle platform at SINA Mobility , focusing on efficient battery systems, robust BMS architecture, and integrated vehicle charging solutions. We’re looking for a passionate Battery & BMS Development Engineer to lead end-to-end design, testing, and validation of lithium-ion battery packs and charging subsystems. This is a full time opportunity, 1st 5 months would be on probation with salary limited upto 15k/ month. The full time hiring would be decided post the completion of probation period(depending on the performance). The interested candidate should have the below mentioned skills Key Responsibilities: Battery Pack Development Design, size, and develop lithium-ion battery packs (NMC/LFP cells) for two-wheeler or light EV applications. Perform cell selection, configuration (series/parallel), and pack architecture based on voltage/current targets. Design battery enclosures considering thermal management, mechanical integrity, and safety standards (AIS-156, IP67, etc.). Develop wiring harnesses, interconnects, bus bars, and fuses. Battery Management System (BMS) Work on BMS hardware and software architecture — including cell balancing, SOC/SOH estimation, protection logic, and CAN communication. Interface with suppliers or develop in-house custom BMS firmware . Integrate BMS with vehicle controller and telemetry systems. Validate and calibrate sensors (voltage, current, temperature) . Develop charge safety, cut-off, and protection circuitry. Below mentioned aren't required, but can increase the chances. Charging System Integration Knowledge about design of on-board charger (OBC) and DC fast charging interface as per relevant standards (IEC 62196, CHAdeMO, Bharat DC001, etc.). Work with external vendors for charger–vehicle handshake protocols (CAN, PWM, PLC) . Testing & Validation Conduct performance, durability, and abuse tests (short circuit, overcharge, thermal runaway). Coordinate validation at NABL labs for AIS-156, AIS-038 Rev 2 compliance. Analyze battery pack data for degradation, efficiency, and cycle life improvements. Documentation & Cross-Functional Work Prepare schematics, test reports, and BOMs. Support vehicle integration , mechanical design, and homologation teams. Manage supplier evaluation and sourcing for cells, BMS PCBs, and charging components. Key skills required: 1–6 years in EV battery development, preferably with 2W/3W/LCV manufacturers or Tier-1 suppliers (college projects would also be considered) Should have core knowledge in Lithium-ion cell chemistry (LFP/NMC), pack design, battery modeling, thermal management. Knowledge about tools/ software like Altium / KiCAD / MATLAB / Simulink / LTspice / CANalyzer.  Good understanding of materials & ability to learn new techniques faster. Have their own vehicle to commute between office, factory & suppliers. Nice-to-have: Experience in battery simulation, BMS firmware (C/C++), and charging protocol integration. Job location is Peenya, Bangalore . Salary payment would be upto 15000/month, for 5 months. Salary for full time would be decided post probation completion. Interested candidates can mail their resumes to



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