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Lead BMS Design BESS

Larsen & Toubro -
Bengaluru, Karnataka

Apply Now

Job details

Qualifications

TCP
Git
Master's degree
C++
Electrical experience
C
Bachelor's degree
Product development
Embedded software
BMS
Debugging

Full job description

LNT/LBDB/1723698

DEIC-L&T Precision Engineering & Systems IC
Bengaluru

Posted On 24 Apr 2026
End Date 21 Oct 2026
Required Experience15 - 20 years

Skills

Knowledge & Posting Location

Battery Management Systems Algorithms Control Engineering

Minimum Qualification

Bachelor of Technology (BTech) & Master of Technology (MTech)

Job Description

Lead BMS System Engineer – Stationary Energy Storage (BESS)

About the Role

We are seeking a Lead BMS System Engineer to drive the architecture, design, and validation of Battery Management Systems (BMS) for commercial and utility?scale stationary Battery Energy Storage Systems (BESS).

In this role, you will own the end?to?end BMS system lifecycle—from requirements definition and system architecture to validation, field deployment, and continuous improvement. You will act as the technical authority for BMS within the BESS platform, mentoring engineers and collaborating closely with power electronics (PCS), EMS, grid integration, and validation teams.

This position demands strong system?level thinking, deep BMS expertise, and technical leadership to ensure safety, scalability, reliability, and long?term performance of field?deployed energy storage assets.

Key Responsibilities

Technical Leadership & Ownership

Act as technical lead and subject?matter expert (SME) for BMS architecture in stationary BESS products.
Own system?level BMS requirements, interfaces, and design decisions.
Review and approve BMS designs, algorithms, and implementation from junior engineers.
Mentor and technically guide engineers across firmware, validation, and system integration.

BESS Controller & System Design

Lead the design and development of BESS controller architecture, coordinating BMS, PCS, EMS, and SCADA interfaces.
Define system?level control strategies for long?duration, high?capacity battery systems.
Ensure scalability across multi?rack, containerized, and MW/MWh?scale deployments.

BMS Firmware & Algorithms

Architect and guide development of RTOS?based BMS firmware (C / C++).
Lead implementation and tuning of advanced BMS features:
- Cell and module monitoring
- Passive and active cell balancing algorithms
- Protection, derating, and control logic
Ensure firmware follows safety?critical and reliability?focused design practices.

Communication & Integration

Define and govern communication architectures:
- CAN / CAN FD for internal BESS communication
- Modbus RTU / TCP for EMS, PCS, and SCADA
Own interface specifications and sequencing between BMS, PCS, and EMS.
Support grid?interface and system commissioning requirements.

Validation, Safety & HIL

Lead HIL (Hardware?in?the?Loop) strategy and execution for BMS and system?level validation.
Define test coverage for:
- Normal and edge?case operation
- Grid?relevant fault and abuse scenarios
Architect and tune diagnostics and protection strategies for:
- Electrical faults (over/under voltage, current)
- Thermal faults
- Insulation resistance and communication failures
Ensure compliance with relevant stationary storage safety and reliability standards.

OTA, Cybersecurity & Field Reliability

Architect secure OTA firmware update frameworks for long?life, field?deployed BESS.
Ensure robustness, fail?safe operation, and rollback strategies.
Drive cybersecurity awareness for connected energy systems.

Product Lifecycle & Field Support

Lead technical support for:
- Factory Acceptance Testing (FAT)
- Site Acceptance Testing (SAT)
- Commissioning and deployments
Perform system?level root cause analysis (RCA) of field issues.
Feed lessons learned into design, firmware, and validation improvements.
Own technical documentation, system specifications, and validation reports.

Required Skills & Experience

Core Technical Expertise

12–15 years of experience in BMS, embedded systems, or energy storage product development.
Strong hands?on expertise in:
- RTOS?based embedded firmware (C / C++)
- CAN / CAN FD / Modbus communication
- Cell balancing algorithms and SOC/SOH?related considerations
- HIL validation and fault diagnostics
Experience with microcontrollers and BMS ICs used in stationary storage systems.
Deep understanding of Li?ion battery electro?thermal behavior, aging, and safety limits.
Proficiency with embedded debugging tools (JTAG, CAN tools, logic analyzers).
Experience working with Git and structured product development processes.

System & Product Experience

Proven experience delivering stationary BESS products (C&I or utility?scale preferred).
Strong understanding of BMS–PCS–EMS interaction at system level.
Familiarity with grid?relevant operating and fault scenarios in stationary storage.
Exposure to high?voltage battery systems.

Preferred Qualifications

Bachelor’s or Master’s degree in Electrical, Electronics, Embedded Systems, or related field.
Knowledge of IEC / UL standards applicable to stationary energy storage.
Exposure to functional safety concepts and safety?critical design.
Awareness of cybersecurity requirements for OTA and connected infrastructure assets.

Soft Skills & Leadership Expectations

Strong system?level and architectural thinking.
Ability to lead technically while remaining hands?on.
Excellent cross?functional communication with firmware, hardware, validation, EMS, and power electronics teams.
High sense of ownership, safety, and product reliability.
Comfortable making design trade?offs under schedule and field constraints.

Apply Now

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