The battery-specific identity string that links a physical battery to the correct battery passport record.
Unique identifier is the battery-specific identity anchor in the passport stack. It keeps the physical battery, data carrier, web link, and passport record resolving to the same battery over production, use, service, transfer, second life, and end of life.
A unique identifier is the unique string of characters for the identification of batteries and the link to a battery passport. It is not the same as the data carrier and not the passport itself.
A unique identifier is the battery-specific unique string of characters used for the identification of batteries and for enabling the passport link. Its practical job is to act as the digital identity anchor that keeps the same physical battery connected to the same passport record over time.
The common mistake is to treat the identifier, carrier, and passport as the same object. The identifier is the identity value, the carrier is the access layer, and the passport is the record. All three need to stay aligned, but each solves a different problem.
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. The term should be read with Article 77 battery-passport obligations and data-carrier requirements. ESPR uses the related but broader unique product identifier for product passports, so the terms should be connected but not collapsed.
Implementation teams should govern identifier creation, identity governance, uniqueness, persistence, persistent URL or lookup resolution, mapping to data carriers, replacement procedures, parent-child relationships where batteries, modules, or packs are linked, and lifecycle event links. A battery can become difficult to trust if service, transfer, second-life, or recycling records cannot be tied back to the same identifier.
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
Reviewed public draft page. Aligns with identity/access policy: separates identity, carrier, QR/access mechanism, passport record, item granularity, and service-platform infrastructure.
Implementation records should capture issuing logic, identifier format, battery item relationship, batch or model relationship, data carrier resolution, passport URL, lookup path, lifecycle update rule, replacement process, duplication check, migration procedure, and broken-link remediation.
Unique identifier is where battery-passport theory meets object identity. It is the battery identity anchor: not the passport and not the label, but the control that helps ensure the same physical battery must stay connected to the same digital record as service events, ownership changes, repurposing decisions, and recycling milestones occur.
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