Ninganxing E-Bike Battery Traceability Codes
This overview was generated with AI from the public sources listed below and checked against them before publication. It has not had a complete human fact-check — treat it as a starting point and follow the sources.
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Four months after a lithium battery fire killed fifteen people in a Nanjing apartment block, every newly sold e-bike got a QR code tying frame, motor and battery together. The fatal battery was bought online.
what does this mean?
The strongest source is the operator's or the city's own reporting — an official report, dataset or press release. It grades who did the looking — not how well the project went. All four grades →Part of 1001 Smart Cities — 1,167 documented projects · 🏙️ 8 more in Nanjing · 🛡️ Safety & security guide · 🏛️ Governance projects
After the 23 February 2024 fire at Mingshang Xiyuan in Yuhuatai district, Nanjing's market regulator built a citywide e-bike coding system, Ninganxing, and launched it inside the My Nanjing app on 28 June 2024 for use by more than 2,000 retail outlets. Staff capture the frame number, motor number and battery details at the point of sale, check them against the vehicle's certificate of conformity, and generate a single QR code binding one vehicle, one battery and one identifier. The system has four modules: distributors log stock and quality documents, shops log arrivals, ledgers and coded sales, consumers can self-register a bike bought elsewhere, and regulators can query vehicles, shops and sales records for registration, fire-safety and enforcement use.
🎓 Lesson
The code addresses the shop, and the accident did not happen in one. The official investigation into the fire that killed fifteen people found it began in a lithium battery the owner had fitted illegally, bought from an unlicensed seller online, on a machine sold in breach of the national standard — an over-capacity pack that was never in a compliant retailer's ledger. A point-of-sale registry makes the legal channel auditable, which is worth doing, and leaves the channel that caused those deaths exactly as visible as before.
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1001 Smart Cities (2026). “Ninganxing E-Bike Battery Traceability Codes” — Nanjing, China. The Smart City Atlas. https://1001smartcities.org/projects/nanjing-ninganxing-ebike-code/ (last verified 2026-08-06). Data: CC BY 4.0.
The underlying data is free to reuse with attribution — see the open data page.