• NAIDU SRUJANA

The safe and efficient operation of multi-cell lithium-ion battery packs demands real-time monitoring of voltage, temperature, state of charge (SOC), state of health (SOH), and remaining useful life (RUL). This paper presents the design, implementation, and experimental validation of a low-cost, web-based Battery Management System (BMS) using the ESP32 microcontroller for a 6S3P (22.8V nominal, 15Ah) lithium-ion pack. The system measures module-level voltages via resistive dividers, estimates SOC using voltage-SOC mapping, computes SOH based on open-circuit voltage degradation, and initializes RUL as equal to SOH establishing a forward-compatible architecture for future predictive analytics. Temperature is monitored via DS18B20, and all data is visualized on an embedded, responsive web dashboard using Chart.js and Canvas-based gauges. A 10-point moving average filter and per-module voltage calibration (±0.05V accuracy) ensure measurement stability. Data is logged to CSV with energy integration and timestamping. The system demonstrates >72 hours of continuous operation, sub-500ms update latency, and seamless Wi-Fi connectivity. Experimental results validate the accuracy and usability of the platform for educational, prototyping, and small-scale industrial applications. Future work includes coulomb counting, passive balancing, cloud integration, and machine learning-based RUL prediction.

Battery Management System (BMS), ESP32, IoT, State of Charge (SOC), State of Health (SOH), Remaining Useful Life (RUL), Web Server, Real-time Monitoring, 6S3P Battery, Embedded Systems, Arduino, Chart.js, Predictive Maintenance.

"DESIGN AND IMPLEMENTATION OF A REAL-TIME WEB-BASED BATTERY MANAGEMENT SYSTEM USING ESP32 FOR 6S3P LITHIUM-ION PACKS", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.12, Issue 10, page no.c267-c276, October-2025, Available :http://www.jetir.org/papers/JETIR2510238.pdf

"DESIGN AND IMPLEMENTATION OF A REAL-TIME WEB-BASED BATTERY MANAGEMENT SYSTEM USING ESP32 FOR 6S3P LITHIUM-ION PACKS", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.12, Issue 10, page no. ppc267-c276, October-2025, Available at : http://www.jetir.org/papers/JETIR2510238.pdf