A Digital Battery Passport is expected to provide reliable information about a battery throughout its lifecycle. But even well-designed data processes can produce incorrect information.
A technical specification may contain an outdated value. A supplier may submit incorrect material information. A calculation may use the wrong input. A data integration process may associate information with the wrong battery. Or a value that was correct when published may become outdated as the battery moves through its lifecycle.
The important question is therefore not whether an organisation can guarantee that every data point will always be correct.
It is whether the organisation has a controlled process for detecting, correcting and documenting errors when they occur.
For battery manufacturers, OEMs and compliance teams, this is a central part of maintaining Battery Passport data integrity.
What Data Does the EU Batteries Regulation Require?
From 18 February 2027, each EV battery, LMT battery and industrial battery above 2 kWh placed on the EU market or put into service must have an electronic Battery Passport.
Article 77 of Regulation (EU) 2023/1542 places responsibility on the economic operator placing the battery on the market to ensure that the information in the Battery Passport is accurate, complete and up to date.
The regulation also requires data authentication, reliability and integrity, while rights to access, introduce, modify and update information must be appropriately restricted.
This means correcting an error should be treated as part of normal Battery Passport data management, rather than as an exceptional activity performed only when an audit takes place.
How Can Battery Passport Errors Occur?
Errors can enter the Passport at different stages of the data lifecycle.
A manufacturer might upload an outdated technical specification. A supplier could provide an incorrect recycled-content figure. A production system might contain a data-entry error. An integration could map a value to the wrong battery model. A calculation could use an incorrect unit or source dataset.
There is also another category of error: data that was once correct but is no longer current.
Battery Passport information can relate to both the battery model and the individual battery, including information resulting from its use. As batteries are operated, repaired, repurposed or otherwise processed, relevant information can change.
A robust system therefore needs to distinguish between an incorrect value, an outdated value and a legitimate update.
Step 1: Detect and Record the Problem
The first step is to identify that a data point may be wrong.
An error might be discovered through an automated validation rule, an internal review, a supplier notification, a customer query, an audit or a market surveillance activity.
Once identified, the issue should be recorded rather than immediately overwritten.
A useful correction record should establish:
What is wrong?
Identify the affected data point and the published value.
Which batteries are affected?
Determine whether the problem concerns one battery, a batch, a model or a wider population.
Where did the value originate?
Identify the source system, supplier, document or calculation.
When was it published?
Establish the relevant Passport version and publication date.
Who owns the data?
Identify the responsible data owner and the team responsible for correction.
This creates a controlled starting point for the correction process.
Step 2: Assess the Impact
Not every incorrect value has the same significance.
An error in a non-critical descriptive field may have a different impact from an incorrect value relating to safety, carbon footprint, material composition, performance or regulatory compliance.
The organisation should therefore assess the scope and significance of the error before deciding how to respond.
For example, a single incorrect unit conversion could affect thousands of Passport records if the same integration process was used across a product range.
Impact assessment should consider whether the error affects:
- individual batteries or entire models;
- information already shared with other actors;
- regulatory or compliance assessments;
- safety or handling information;
- sustainability calculations;
- downstream repair, reuse or recycling activities; or
- information submitted to or checked by authorities.
The purpose is to ensure that the correction reaches every affected record and process.
Step 3: Correct data from the Source, Not Only the Passport
A common weakness in data management is correcting the final output while leaving the original source unchanged.
If a Battery Passport contains an incorrect capacity value because the PLM system contains the wrong value, manually changing the Passport may solve the immediate problem but leave the underlying issue intact.
The correction should normally begin at the appropriate source.
Source record → validation → downstream systems → Battery Passport
This is where Battery Passport Data Lineage becomes particularly useful. Lineage helps organisations understand which Passport records depend on a particular source and what may need updating when that source changes.
Step 4: Validate the Corrected Information
The corrected value should pass the appropriate validation checks before publication.
Validation can include format and unit checks, range checks, identifier matching, cross-system consistency checks and comparison against supporting evidence.
Where appropriate, a second person or responsible function should review the correction.
For example, an engineering data owner may validate a corrected technical specification, while a sustainability specialist may review an amended carbon footprint calculation.
BASE's How To Validate Battery Passport Data Before Publication: A Practical Data Quality Guide provides a useful framework for considering validation before information enters the published Passport.
Step 5: Preserve the Correction History
Correcting a value does not mean deleting the error history.
An organisation should retain sufficient information to establish what the previous value was, what changed, why the change was made, who authorised it and when the correction took effect.
This creates an audit trail around the correction.
For example:
Record | Example |
Original value | 85 kWh |
Corrected value | 82 kWh |
Reason | Source specification error |
Source | Approved engineering record |
Corrected by | Engineering data owner |
Validated by | Quality team |
Effective date | Date of correction |
Affected records | Battery model and relevant units |
The exact implementation will depend on the organisation's systems and governance model, but the principle is important: a corrected Passport should remain explainable.
This is closely connected to Battery Passport Audit Trails and Evidence Management, which explores how organisations can preserve evidence around Battery Passport information and its history.
Step 6: Update the Published Passport
Once the corrected information has been validated and approved, the relevant Passport data should be updated.
The technical process will depend on the organisation's Battery Passport architecture and service provider, but access to introduce, modify and update Battery Passport information must be appropriately restricted under Article 78 of the Batteries Regulation. The regulation also requires data authentication, reliability and integrity.
The update process should therefore ensure that:
- The correct record is changed.
- The authorised person or system performs the update.
- The updated information is validated.
- The previous state remains traceable where appropriate.
- The change is reflected consistently across connected systems.
This prevents a correction in one database from leaving contradictory information elsewhere.
Who is Accountable for a Wrong Data Point?
Accountability should be established before an error occurs.
The economic operator placing the battery on the market has the regulatory responsibility for ensuring that the Battery Passport information is accurate, complete and up to date. The operator may authorise another operator to act on its behalf, but responsibility needs to remain clearly governed.
Internally, however, responsibility for individual data categories can be distributed.
Engineering may own technical characteristics. Sustainability may own environmental information. Supply chain teams may manage supplier data. IT may manage integrations and access controls. Compliance may oversee regulatory requirements and escalation.
BASE's Battery Passport Data Governance article explores this division of responsibility and why clearly defined ownership is necessary for maintaining reliable Passport information.
What if the Error Has Already been Shared?
A correction becomes more complicated when inaccurate information has already been accessed or used by other parties.
The organisation should determine which actors may have relied on the affected information and whether they need access to the corrected version.
The appropriate response will depend on the nature of the error, the affected information and applicable legal or contractual requirements. Safety-critical, regulatory or materially significant errors may require more urgent escalation than minor corrections.
This is another reason why maintaining version history and clear audit trails matters. An organisation should be able to establish which information was available at a particular point in time.
Build Correction into the Battery Passport Architecture
Correction should be designed into the Battery Passport system from the beginning.
The wider EU Digital Product Passport framework requires Passport data to be accurate, complete and up to date. It also requires restricted rights to introduce, modify or update data and measures to ensure authentication, reliability, integrity, security and fraud prevention.
Organisations should therefore consider correction workflows during platform selection and implementation.
The system should make it possible to identify affected records, apply authorised updates, preserve relevant history and maintain consistent information across connected systems.
A Step-By-Step implementation approach can help organisations incorporate these requirements into their wider implementation planning.
How BASE Supports Data Integrity
The BASE project is developing and validating a Digital Battery Passport framework focused on transparent, secure and interoperable information management across the battery value chain.
Data authenticity, traceability and integrity are important elements of this work. BASE explores how information can be exchanged between different actors while supporting data authenticity verification, controlled access, interoperability and privacy by design.
This is directly relevant when Battery Passport data needs to be corrected. A trusted Passport environment needs to support not only the publication of information, but also the controlled management of changes throughout the battery lifecycle.
By connecting data governance, traceability and auditability, BASE contributes to the wider goal of creating Digital Battery Passports that remain reliable as the underlying data evolves.
A Wrong Data Point Should Have a Clear Path to Correction
No data system should assume that errors will never happen.
What matters is whether an organisation can identify an incorrect value, assess its impact, correct the appropriate source, validate the replacement, update affected Passport records and preserve evidence of what happened.
For manufacturers, OEMs and compliance teams, this turns data correction into a defined governance process rather than an emergency response.
The key question is therefore not simply:
“Is the Battery Passport correct today?”
It is:
“If something becomes incorrect tomorrow, can we detect it, correct it and prove what changed?”
That is a fundamental part of maintaining Battery Passport data integrity throughout its lifecycle.
The BASE project has received funding from the Horizon Europe Framework Programme (HORIZON) Research and Innovation Actions under grant agreement No. 101157200.
References & Resources
Regulation (EU) 2023/1542 - Batteries and Waste Batteries Regulation: https://eur-lex.europa.eu/eli/reg/2023/1542/oj
Regulation (EU) 2024/1781, the Ecodesign for Sustainable Products Regulation: https://eur-lex.europa.eu/eli/reg/2024/1781/oj/eng
European Commission - Guidance to support preparations for the Digital Batteries Passport: https://single-market-economy.ec.europa.eu/news/guidance-support-preparations-digital-batteries-passport-2026-08-21_en
European Commission - Digital Product Passport for Batteries: https://single-market-economy.ec.europa.eu/single-market/digital-product-passport/batteries_en
BASE Project - Battery Passport Data Provenance: How To Prove Battery Passport Data Origins: https://base-batterypassport.com/blog/regulations-4/battery-passport-data-provenance-data-origin-139