Battery Passport Data Fields: The Full List

The field list is the part of the battery passport that most programmes read first and act on last. Reading it is quick. Turning it into a set of supplier requests, each aimed at the party that actually holds the number, is the work.

What data must a battery passport carry?

Regulation (EU) 2023/1542 groups the required information into categories rather than presenting a flat list. The grouping matters, because access rights are assigned by group.

Which fields are hardest to obtain?

Difficulty does not follow the order of the list. The fields that hold programmes up are the ones whose source sits several tiers upstream and has no direct obligation to you.

1. Recycled content per metal, because it depends on mass balance bookkeeping at the refiner.
2. Carbon footprint, because it requires primary data from cell manufacture rather than an average.
3. Due diligence evidence, because it reaches to mineral origin through parties you do not contract with.
4. Critical raw material composition, where cathode formulations are treated as commercially sensitive.

Identification and dismantling data, by contrast, sit with the pack assembler and are usually available within weeks. Sequencing a programme to start with what you already hold produces a visible passport quickly and hides the fact that none of the difficult fields have moved.

How is state of health handled?

State of health is the one field that is wrong the moment it is written if it is treated as static. The passport must accept updates, and the useful form is a dated series rather than a replaced value, so that a second-life buyer sees a trajectory rather than a snapshot.

Recording each update as a dated event, in the EPCIS 2.0 vocabulary, gives that history without inventing a format. It also means an overwritten figure cannot quietly erase evidence of degradation.

What does recycled content require in practice?

Recycled content is declared separately for cobalt, lithium, nickel and lead, and each declaration must be supported by evidence that survives verification. The thresholds and their dates are covered in battery recycled content targets.

The mechanism that makes a claim defensible is chain of custody. A physically segregated claim is the strongest and the least commercially practical; a mass balance claim is what most chains will use, and it requires bookkeeping at the refiner that your contract has to reach.

How the fields map to a supplier request

Grouping the field list this way turns it into four supplier conversations plus a telemetry integration, which is a plan. Reading it as a flat list of around ninety attributes produces a spreadsheet nobody owns.

How do the fields change as the battery ages?

Most of the field list is fixed at manufacture and never changes: chemistry, composition, carbon footprint and recycled content describe how the battery was made. A smaller set describes how it has been used, and that set is the reason a battery passport is harder to operate than a passport for a static product.

Designing the record so the fixed fields are written once and the in-service fields append is what keeps the passport honest over fifteen years. A model that permits any field to be overwritten silently loses the degradation history that gives a second-life buyer a reason to pay for the pack.

What happens if a field is missing?

A passport with an unpopulated mandatory field is a non-compliant passport, not a partial one. There is no partial credit at market surveillance, which is why gap reporting against the field list matters more than the rendering of the passport itself.