As the EU Battery Regulation moves towards full implementation, much of the discussion around Digital Battery Passports (DBPs) has focused on the information that batteries must contain. However, collecting data is only one part of the challenge. The real value of a Battery Passport lies in how that information is shared securely and efficiently between organisations throughout the battery's lifecycle.
A single battery can pass through many hands before reaching its end of life. Manufacturers create the battery, vehicle manufacturers integrate it into products, distributors place it on the market, repair centres service it, second-life operators repurpose it, and recyclers recover valuable materials. Market surveillance authorities also need access to verify compliance with the EU Battery Regulation.
For this connected ecosystem to function effectively, different digital systems must be able to communicate with one another. This is where Application Programming Interfaces (APIs) play a vital role.
Instead of relying on spreadsheets, emails or manual document exchanges, APIs enable authorised software systems to exchange Battery Passport data automatically, securely and in a structured format. As Digital Battery Passports become mandatory from 18 February 2027 for electric vehicle batteries, industrial batteries above 2 kWh and light means of transport batteries, organisations should begin preparing API-ready systems now.
What is a Battery Passport API?
An Application Programming Interface, commonly known as an API, is a set of rules that allows different software applications to exchange information automatically.
A simple way to think about an API is as a secure messenger. One system requests specific information and another system responds with the relevant data without requiring manual intervention.
Within a Digital Battery Passport ecosystem, APIs allow authorised organisations to retrieve or update battery information whenever required. For example, a recycler scanning a Battery Passport QR code could automatically obtain details about battery chemistry, dismantling guidance and hazardous materials. Likewise, a market surveillance authority could verify whether the required compliance information is available before a battery is placed on the EU market.
The API itself is largely invisible to users. Instead, it works behind the scenes to ensure that the right information reaches the right organisation at the right time.
Why APIs Matter for Digital Battery Passports
A Battery Passport is not a static document that is created once and stored indefinitely. It is a digital record that evolves as the battery moves through manufacturing, use, maintenance, reuse and recycling.
During this journey, different stakeholders generate new information. A manufacturer records technical specifications and production data. Service providers may add maintenance records or software updates. Second-life operators contribute operational information, while recyclers document recovery outcomes and material flows.
Without APIs, much of this information would have to be entered manually into multiple systems, increasing the likelihood of errors, duplication and inconsistent records.
API-based data exchange reduces this administrative burden by allowing trusted systems to communicate automatically. Instead of copying information between databases, organisations can retrieve the latest available data directly from their source.
This approach improves efficiency while helping to maintain a single, consistent digital history for every battery.
Supporting Compliance with the EU Battery Regulation
The Digital Battery Passport is established under Regulation (EU) 2023/1542, which introduces mandatory digital records for specific battery categories placed on the European market from February 2027.
The Regulation requires batteries to carry a unique identifier and a QR code that provides access to passport information covering technical characteristics, sustainability, lifecycle performance and other mandatory data elements.
Many of these data fields already exist within manufacturers' enterprise systems. APIs provide a practical way to make this information available to authorised stakeholders without creating entirely new reporting processes.
As additional delegated acts, implementing acts and harmonised European standards are published, APIs will become increasingly important for supporting consistent and interoperable data exchange across the battery value chain.
Different Stakeholders Need Different Information
One of the biggest strengths of API-based Battery Passport systems is that they can provide different information to different users while maintaining a single digital record.
Battery manufacturers primarily need to upload technical specifications, manufacturing data, conformity information and sustainability metrics required under the Regulation. As batteries continue through their lifecycle, additional information can be linked to the same digital identity without replacing the original records.
Market surveillance authorities have a different objective. Their role is to verify compliance with the Regulation by checking that mandatory information is complete, accessible and accurate. APIs allow this verification to happen much more efficiently than requesting documents manually from every manufacturer.
Repair centres and maintenance providers may need access to battery configuration information, maintenance history or safety guidance before carrying out servicing activities. Secure APIs can provide this information while ensuring that commercially sensitive data remains protected.
Recyclers also require access to specific information that supports safe dismantling and efficient material recovery. Knowing a battery's chemistry, hazardous substances and recommended treatment methods helps improve recycling efficiency while supporting Europe's wider circular economy objectives.
Although these organisations access the same Battery Passport, each sees only the information relevant to their responsibilities.
Role-Based Access Protects Sensitive Information
Not every stakeholder should be able to view or edit every part of a Digital Battery Passport.
Battery manufacturers may hold commercially sensitive production information that is not relevant to recyclers. Likewise, regulators may require access to compliance documentation that is unnecessary for maintenance providers.
Modern API architecture supports role-based access control, allowing organisations to retrieve only the information they are authorised to access.
This approach improves both cybersecurity and regulatory compliance. It also helps organisations protect confidential business information while ensuring that essential lifecycle data remains available to those who need it.
Authentication mechanisms verify the identity of each user or system, while authorisation rules determine which data can be viewed, updated or shared. Encryption protects information as it moves between digital systems, helping to maintain trust across the Battery Passport ecosystem.
Interoperability is More Important Than a Single Platform
One common misconception is that every organisation will eventually use the same Battery Passport software. In reality, this is highly unlikely.
Battery manufacturers, vehicle manufacturers, repair centres, logistics providers, recyclers and market surveillance authorities already rely on different digital systems. Replacing every platform with a single solution would be impractical and costly.
Instead, the European approach focuses on interoperability. Different systems should be able to exchange information using common data models, communication protocols and security standards, regardless of the software each organisation chooses.
This principle sits at the heart of the EU's broader Digital Product Passport (DPP) initiative under the Ecodesign for Sustainable Products Regulation (ESPR). The aim is to create an interconnected digital ecosystem where trusted information can move seamlessly between stakeholders while remaining secure, reliable and machine-readable.
For organisations preparing for Digital Battery Passports, this means investing in flexible API architectures rather than building isolated systems that cannot communicate with external partners.
A Practical Example of API-Based Data Exchange
To understand how APIs support the Battery Passport throughout its lifecycle, consider the journey of an electric vehicle battery.
When the battery is manufactured, production systems automatically upload information such as the battery's unique identifier, chemistry, technical specifications and sustainability data to the Digital Battery Passport platform through secure APIs.
Once the battery is installed in a vehicle and placed on the market, additional lifecycle information can be added by authorised stakeholders. Maintenance providers may record software updates or repairs, while fleet operators could contribute operational data where appropriate.
Years later, when the battery reaches the end of its first life, a second-life operator can retrieve relevant information about its performance history and State of Health before deciding whether it is suitable for reuse.
Eventually, when the battery is sent for recycling, the recycler can access information on material composition, hazardous substances and dismantling guidance. Once valuable materials have been recovered, recycling outcomes can also be linked to the Battery Passport, helping to complete the battery's digital lifecycle record.
Throughout this process, the battery retains a single digital identity, while APIs ensure that authorised stakeholders can access the information they need without creating duplicate records or manually exchanging documents.
Preparing API Infrastructure for Future Requirements
Although the Digital Battery Passport becomes mandatory for relevant batteries from 18 February 2027, the supporting technical framework continues to evolve.
The European Commission is working alongside European Standardisation Organisations to develop harmonised standards that will support Digital Product Passports across multiple industries. Work led by CEN-CENELEC Joint Technical Committee 24 (JTC 24) is helping define common approaches for digital identifiers, data carriers, interoperability, cybersecurity and information exchange.
As delegated acts and implementing acts continue to clarify technical requirements, organisations should avoid building APIs that only satisfy today's compliance needs.
Instead, systems should be designed with flexibility in mind. A well-structured API can accommodate new data fields, reporting requirements and interoperability standards without requiring extensive redevelopment.
This approach also prepares organisations for future Digital Product Passports beyond batteries, as additional product groups are introduced under the ESPR over the coming years.
How BASE is Supporting Secure Battery Data Exchange
At BASE, we recognise that a successful Digital Battery Passport depends on more than collecting high-quality data. It also requires that information can be exchanged securely, consistently and efficiently between trusted stakeholders throughout the battery lifecycle.
That is why the BASE project is developing and validating an interoperable Digital Battery Passport framework that supports secure data sharing across manufacturers, suppliers, vehicle producers, service providers, second-life operators, recyclers and regulatory authorities.
Our work explores how technologies such as standardised data models, interoperable APIs, trusted digital identities and lifecycle traceability can support the objectives of the EU Battery Regulation while remaining flexible enough to adapt to future European standards.
Through collaboration with industry, research organisations and technology partners, BASE is helping demonstrate how Digital Battery Passports can operate in real-world environments, supporting compliance while strengthening transparency, circularity and cross-border cooperation across the battery value chain.
Looking Ahead
The Digital Battery Passport is transforming how battery information is managed throughout the product lifecycle. However, its success depends not only on collecting data but also on ensuring that information can move securely between the organisations responsible for manufacturing, using, repairing, repurposing and recycling batteries.
APIs provide the technical foundation for this connected ecosystem. They enable trusted systems to exchange structured information automatically, reduce manual reporting and help maintain a consistent digital record throughout the battery's life.
As Europe prepares for the mandatory introduction of Digital Battery Passports in February 2027, organisations should begin reviewing how their existing systems exchange information with suppliers, customers and regulatory authorities. Developing flexible, standards-based APIs today will make it easier to adapt as delegated acts, implementing measures, and European standards continue to emerge.
Ultimately, the future of battery traceability depends on interoperability. Organisations that invest in secure and scalable data exchange will be better positioned to meet regulatory requirements, improve operational efficiency and contribute to a more transparent and circular European battery ecosystem.
The BASE project has received funding from the Horizon Europe Framework Programme (HORIZON) Research and Innovation Actions under grant agreement No. 101157200.
References
Regulation (EU) 2023/1542 concerning batteries and waste batteries (Official Journal of the European Union): https://eur-lex.europa.eu/eli/reg/2023/1542/oj
Consolidated Text of Regulation (EU) 2023/1542: https://eur-lex.europa.eu/eli/reg/2023/1542/2023-07-28/eng
European Commission – Batteries: https://environment.ec.europa.eu/topics/waste-and-recycling/batteries-and-accumulators_en
European Commission – Advancing sustainability through the Ecodesign for Sustainable Products Regulation: https://environment.ec.europa.eu/news/advancing-sustainability-through-espr-2025-02-19_en
European Commission – EU Data Act: https://digital-strategy.ec.europa.eu/en/policies/data-act
CEN-CENELEC – Digital Product Passport Standards (JTC 24): https://standards.cencenelec.eu/ords/f?p=205:7:::::FSP_ORG_ID:3342699&cs=152A83699C987EFA564209B7AC7311C86