Engineering Intelligence into Every Cell: Hinduja Tech's 48V Battery Management System

The shift toward vehicle electrification is no longer a distant forecast; it is the present reality of the automotive industry. As hybrid and electric vehicles become mainstream, the Battery Management System (BMS) has emerged as one of the most critical components in the vehicle electronics ecosystem. It is the brain behind the battery, the system that ensures every cell is monitored, every charge cycle is optimised, and every safety threshold is respected.

At Hinduja Tech, vehicle electronics and software engineering is one of our core offerings, spanning hardware development, embedded software, system engineering, verification and validation, and compliance with international automotive standards. Our work on a 48V battery management system is a strong reflection of that capability in action.

Project Overview: End-to-End BMS Development

This engagement was a comprehensive, end-to-end programme covering the full development lifecycle of a 48V battery management system from initial benchmarking through to system validation. The scope was deliberately broad, reflecting the kind of holistic engineering partnership that Hinduja Tech brings to every project.

The project scope included:

• Benchmarking and system requirements definition
• Hardware board design, PCB layout, and prototype development and testing
• Software development, unit testing, and hardware/software integration testing
• Full system validation

The system architecture involved a control module and a battery monitoring module working in tandem, interfacing with a battery pack or battery simulator and connected to a charging system or load, with CANoe and a PC used for communication, diagnostics, and validation.

The Challenges

BMS development is technically demanding, and this project was no exception. The team navigated three significant engineering challenges that tested both hardware and software expertise:

Modular and robust product design Designing a BMS that is both modular, allowing for scalability and reuse, and robust enough to handle the real-world demands of an automotive environment is a balancing act. The architecture had to be clean, flexible, and production-ready without compromising on reliability.

Integration of the auto-generated SPI Driver Auto-generated code offers speed and standardisation but integrating it cleanly into a custom embedded software stack, especially at the hardware abstraction layer, often surfaces compatibility and timing issues that require careful debugging and resolution.

Chipset not performing as per datasheet specifications One of the planned chipsets did not behave as documented, a challenge that required the team to diagnose root causes, adapt the hardware design, and revalidate the system without derailing the programme timeline.

Our Approach:

Hinduja Tech follows the proven V-model methodology of agile project management, enabling hardware, software, and system integration to be executed concurrently rather than sequentially. This approach is fundamental to how we compress timelines without compromising quality.

For the BMS programme, the software architecture was structured across four clearly defined layers: **the application layer, data abstraction layer, hardware abstraction layer, and low-level drivers, all running on a Renesas microcontroller unit. **

• Application Layer (APL) - the top-level logic including fault management, pre-charge/load control, DC/DC control, warning management, and main state machine.
• Data Abstraction Layer (DAL) - abstracting data from specific hardware peripherals, including ITC, DGTM, CAN, ADC, PORT, and FDL interfaces.
• Hardware Abstraction Layer (HAL) - isolating the software from the specific microcontroller hardware
• Low-Level Drivers (LLD) - the lowest software layer, interfacing directly with the microcontroller
• Microcontroller Unit - the Renesas R7F7016844AFP-C

This layered approach ensured clean separation of concerns, making the system easier to test, validate, and maintain.

The team used an industry-standard toolchain throughout the programme, including OrCAD Schematic and Mentor Graphics PADS for hardware design; MATLAB/Simulink and Embedded Coder for model-based software development; CS+ Renesas IDE for embedded coding; Vector CANoe for communication and diagnostics; and E1 Debugger for low-level hardware debugging.

Our Solution

By combining hardware and embedded software expertise, Hinduja Tech delivered a fully-validated 48V BMS, from a PCB prototype to an integrated system. The modular architecture challenge was addressed through deliberate system-level design decisions, ensuring that components could be developed, tested, and updated independently. The SPI Driver integration issue was resolved through iterative debugging at the hardware abstraction layer, and the chipset anomaly was tackled through root-cause analysis and hardware adaptation, all within programme timelines.

The outcome was a production-oriented BMS solution that satisfied system requirements, passed hardware-software integration testing, and was validated end-to-end, demonstrating what can be achieved when electronics engineering, software development, and systems thinking work together.

Why Global OEMs Partner with Hinduja Tech

As the automotive world accelerates toward electrification, battery management systems will only grow in complexity and criticality. The ability to engineer them from the ground up, hardware to software, concept to validation, is a capability that very few engineering partners can offer with true depth.

At Hinduja Tech, this is precisely what our vehicle electronics and software engineering team is built for. With proven experience across ADAS, e-powertrain, body electronics, and battery-associated engineering, we bring the technical rigour, toolchain expertise, and systems thinking that modern automotive programmes demand.

Building the next generation of vehicle electronics? Let's engineer it together. Reach out to us at info@hindujatech.com.