Battery Pack Aadhaar System
An internship project to create a unique, tamper-proof digital identity for every EV battery pack — from manufacturing to end-of-life.
Executive Summary
Inspired by India's Aadhaar identity framework, the Battery Pack Aadhaar System assigns every battery pack a cryptographically unique digital identity at the point of manufacture. This identity travels with the pack through its entire lifecycle — enabling OEMs, fleet operators, regulators, and recyclers to access a trusted, immutable history of the battery's health, provenance, and usage.
Why it matters
Counterfeit battery packs, opaque second-life assessments, and inability to trace recalled units are systemic problems costing the industry billions. A standardised digital identity layer is the foundational infrastructure needed to unlock battery-as-a-service models, circular economy compliance, and confident second-life EV deployments in markets like India.
Technical Understanding
Basics
Identity Architecture: Embedding a cryptographically signed unique identifier (UID) into the battery BMS at the manufacturing stage — combining hardware security modules (HSM) with a public key infrastructure (PKI) root of trust.
Data Schema Design: Defining a standardised digital passport schema capturing manufacturer, cell chemistry, initial capacity, date of first use, and cumulative cycle count.
Mid-Level Engineering
Lifecycle Event Logging: Designing APIs that allow authorised stakeholders (OEMs, fleet operators, service centers) to append signed events — charge cycles, thermal events, SOH assessments — to the battery's immutable digital record.
Second-Life Assessment Module: Building an ML-driven evaluation pipeline that uses the battery's full lifecycle log to produce a certified State-of-Health (SOH) score and recommended second-life application (stationary storage, micro-grid, etc.).
Advanced View
Blockchain Anchoring: Periodic Merkle-tree anchoring of battery records to a public blockchain (e.g., Polygon) for tamper-evidence — ensuring no single entity can silently alter historical records.
Regulatory Compliance: Aligning the system with India's FAME II battery disposal norms, EU Battery Regulation 2023 digital product passport requirements, and the emerging Global Battery Alliance (GBA) passport standard.
Key Takeaways
- • A hardware-rooted UID is the bedrock of a trustworthy battery identity system.
- • Standardised data schemas enable interoperability across OEMs and recyclers.
- • Blockchain anchoring provides tamper-evidence without centralised trust.
- • Second-life certification unlocks significant residual value from used packs.