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Electric vehicles (EV) rely on high-capacity lithium-ion battery packs requiring careful monitoring and management to ensure safety,
longevity, and optimal performance. This paper presents the design and implementation of a microcontroller-based Battery Management
System (BMS) for an EV battery pack, incorporating real-time State of Charge (SOC) estimation. The BMS monitors key battery
parameters - voltage, current, and temperature - and provides protection against over-voltage, under-voltage, and over-temperature
conditions. SOC is estimated using a hybrid coulomb- counting and voltage-based correction algorithm implemented on a PIC16F72
microcontroller. The prototype was tested under various load conditions, demonstrating accurate monitoring, reliable SOC estimation
within ±5% error, and effective protective responses. Results validate the feasibility of implementing a cost-effective, embedded BMS
suitable for small-scale EV battery demonstrations.
Keywords:
Battery Management System; Coulomb Counting; Electric Vehicles; Lithium-Ion Battery; PIC Microcontroller; State of Charge.
Cite Article:
"Battery Management System for Electrical Vehicle", International Journal for Research Trends and Innovation (www.ijrti.org), ISSN:2456-3315, Vol.11, Issue 4, page no.c182-c202, April-2026, Available :http://www.ijrti.org/papers/IJRTI2604296.pdf
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ISSN:
2456-3315 | IMPACT FACTOR: 8.14 Calculated By Google Scholar| ESTD YEAR: 2016
An International Scholarly Open Access Journal, Peer-Reviewed, Refereed Journal Impact Factor 8.14 Calculate by Google Scholar and Semantic Scholar | AI-Powered Research Tool, Multidisciplinary, Monthly, Multilanguage Journal Indexing in All Major Database & Metadata, Citation Generator