What is DIN DKE SPEC 99100?

DIN DKE SPEC 99100 answers a practical question every battery maker has: which data fields does the battery passport actually need? The EU Battery Regulation lists passport content in legal language in Annex XIII. This specification turns that list into a structured catalog of data attributes, with units, data types and access rules, that a product team or software provider can build against.

It was published by DIN, the German standards institute, and DKE, the German commission for electrical and electronic standards, in early 2025. It is written in English and can be downloaded free of charge.

Where it comes from

The specification builds on the Battery Passport Content Guidance of the Battery Pass consortium, a German project led by Systemiq with eleven partners from industry, technology and research. Initiators included BASF, Circulor, VDE Renewables, acatech and Systemiq, with many other companies contributing.

It was developed under the DIN SPEC procedure, also called PAS. This is faster than a full standard and is run by a consortium, so it does not require every stakeholder to take part. That is why it is a specification, not a European standard or a harmonized standard.

What DIN DKE SPEC 99100 covers

The scope is the three battery categories that need a passport: LMT batteries, industrial batteries above 2 kWh and electric vehicle batteries. Batteries with exclusively external storage, such as flow batteries, are outside its scope.

Attributes are grouped into seven clusters:

1. Identifiers and product data: battery and passport identifiers, manufacturer, place and date of manufacture, category, mass, warranty and status.
2. Symbols, labels and conformity: separate collection symbol, cadmium and lead symbols, carbon footprint label and the EU declaration of conformity.
3. Carbon footprint: the product carbon footprint per functional unit and per life cycle stage.
4. Supply chain due diligence.
5. Materials and composition: chemistry, hazardous substances and critical raw materials.
6. Circularity and resource efficiency: recycled content, dismantling information and spare parts.
7. Performance and durability: capacity, power, round-trip efficiency, state of health and other values.

For each attribute, the specification gives:

• the legal reference in the Battery Regulation or ESPR;
• the access group: public, persons with a legitimate interest, or notified bodies, market surveillance authorities and the Commission;
• the data type and unit;
• whether it is mandatory (M) or recommended (R);
• whether it must also appear on the physical label;
• the information level: battery model, batch or individual item.

How it fits with other battery passport work

• Battery Regulation. The law stays the reference. Where the specification and the regulation differ, the regulation and the Commission's implementing acts and guidance prevail.
• Technical standards. System architecture, identifiers, data carriers and APIs are covered by the CEN-CENELEC DPP standards, not by this specification.
• Data formats. The IDTA Digital Battery Passport templates for the Asset Administration Shell are built to conform to DIN DKE SPEC 99100, and the Battery Pass data model follows the same attributes.

How to use it

1. Download it from DIN Media and use it as your field list for each battery model.
2. Separate mandatory from recommended attributes, and decide which recommendations you will publish.
3. Map each attribute to its owner: your engineering team, your cell or pack supplier, or your BMS for dynamic data such as state of health.
4. Check the information level of each field, so model data is entered once and item data is captured per serial number.
5. Follow the Commission's guidance on which fields are not yet required in February 2027, such as carbon footprint, recycled content and due diligence.