A unique string of characters that identifies a battery and enables a web link to its battery passport.
Unique identifier is the battery-passport identity layer. It identifies batteries and enables a web link to the battery passport, but it is not the battery passport, not the data carrier, and not a generic product identifier in the ESPR sense. The identifier is the stable character string that makes the physical asset, printed access point, and digital record resolve to the same battery over time.
A unique identifier is the specific string of characters that identifies a battery and enables a web link to its battery passport. It is the battery’s digital identity anchor, not the physical QR code, not the same as the data carrier, and not the passport itself and not the passport record.
A unique identifier is a unique string of characters assigned for the identification of batteries and for enabling a web link to the battery passport. In a battery-passport system, it functions as the persistent URL and lookup anchor that connects a physical battery to the correct digital record. The data carrier, such as a QR code or RFID tag, is the doorway that can be scanned. The unique identifier is the identifying value that tells the system which battery record to open. The battery passport is the structured electronic record associated with that battery.
The most common mistake is to collapse the battery passport, data carrier, and unique identifier into one thing. The battery passport is the record, the data carrier is the physical or machine-readable doorway, and the unique identifier is the battery-specific string that determines which record the doorway resolves to. It is also a mistake to treat an internal serial number or ERP database key as automatically sufficient. A compliant identity layer needs stable, unambiguous, machine-readable identity that can support a persistent web link to the battery passport.
The EU Battery Regulation defines unique identifier in Article 3, point 66 as a unique string of characters for the identification of batteries that also enables a web link to the battery passport. This definition is battery-specific and should be read together with the Article 77 battery-passport obligation and the Regulation’s data-carrier requirements. ESPR uses the related but broader unique product identifier concept for product passports, so the two identity terms should be connected but not treated as identical without checking the source and product scope.
For implementation teams, managing the unique identifier means setting up strict identity governance before labels, QR codes, APIs, or passport pages are finalized. The same string must be encoded by factory marking systems, stored in compliance databases, resolved by web links, and preserved through ownership transfers, maintenance, border movements, repair, second-life evaluation, recycling, and system migrations. Where a battery is disassembled, repaired, repurposed, or combined into a changed second-life asset, the architecture may need parent-child identifier relationships so a new identity can point back to first-life manufacturing and compliance history. If identifiers are unstable, proprietary, duplicated, or disconnected from the data carrier, the passport can fail even when the visible QR code still scans.
Regulation (EU) 2023/1542 concerning batteries and waste batteries
a unique string of characters for the identification of batteries that also enables a web link to the battery passport;
Reference: Article 3, point 66
This term matters when teams design battery records, labeling schemes, or digital systems that must identify a specific battery over time. The identifier used in factory systems, printed labels, QR-code resolution, APIs, and compliance databases must remain consistent. Without identity governance, even accurate compliance information becomes hard to trust or reuse, and a physical carrier may eventually resolve to the wrong record or a broken link.
Unique identifier is where battery-passport theory meets object identity. It is not the passport and not the label; it is the anchor that helps the same physical battery must stay connected to the same digital record through production, use, service, transfer, repair, second-life assessment, and end-of-life events. Minespider treats the unique identifier as the digital identity anchor in the battery passport stack: the data carrier opens the doorway, the passport holds or links to the evidence, and the identifier tells the system which battery the doorway and record belong to.
Battery-sector context for passport data, battery identity, access mechanisms, and the evidence layer behind battery-passport implementation.
Read on MinespiderPractical preparation context for connecting battery-passport records, data processes, and implementation workflows before regulatory deadlines.
Read on MinespiderLegal definition of unique identifier as a unique string of characters for battery identification that also enables a web link to the battery passport.
Open referenceLegal context for battery passports, the battery identifier, and access to required battery-passport information for covered battery categories.
Open referenceNeutral implementation context for persistent web links and globally interoperable identifiers connecting physical products to digital information.
Open referenceStandards context for unique identification in supply-chain and item-management systems; useful as implementation background rather than a Battery Regulation legal source.
Open reference