IEC 60623:2026
Vented nickel-cadmium prismatic rechargeable cells and batteries for industrial applications
Standard Introduction
IEC 60623:2026 is the current International Standard for vented nickel-cadmium prismatic secondary cells and battery systems made from them for industrial applications. Edition 6.0 was published on 24 August 2026 and cancels and replaces the 2017 edition.
The technical revision adds internal DC resistance testing, pulse-power calculation, constant-power measurement and determination of durability parameters. It is voluntary unless another instrument requires it, and it does not replace separate safety, installation, transport or environmental rules.
Vented Industrial Nickel-cadmium Scope
IEC 60623:2026 covers marking, designation, dimensions, tests and requirements for vented nickel-cadmium prismatic secondary cells and battery systems made from them for industrial applications.
Sixth Edition Replaces 2017
Published on 24 August 2026, edition 6.0 cancels and replaces IEC 60623:2017 and is identified by IEC as a technical revision.
Expanded Performance Evidence
The revision adds internal DC resistance testing, pulse-power calculation, constant-power measurement and determination of durability parameters.
list_alt Decisions to Make Before Testing
- Confirm the cell is vented rather than sealed
- Confirm prismatic nickel-cadmium chemistry and industrial use
- Identify cell, battery and system configurations in scope
- Obtain the licensed 2026 normative text before defining pass criteria
- Update test plans for the four listed technical changes
- Map markings, designation and dimensions to controlled drawings
- Define representative samples, charging conditions and measurement equipment
- Separate IEC conformity evidence from destination-market legal approval
Who Needs to Comply?
Manufacturers of vented prismatic nickel-cadmium industrial cells and batteries; designers and integrators of stationary, transport, telecom, aerospace or emergency-power systems; procurement and asset teams specifying performance and durability; and laboratories migrating test programs from the 2017 edition.
Key Requirements
Classify the Battery Correctly
Confirm that the product uses vented nickel-cadmium prismatic cells for an industrial application. Sealed industrial cells belong under IEC 60622; other chemistries and portable products require different standards.
Control Designation and Marking
Use the purchased standard to map required designation, markings and declared characteristics to product labels, drawings, specifications and controlled records.
Define Dimensional Evidence
Link applicable dimensional requirements to controlled drawings, measurement methods, sample identification and inspection records for each relevant cell or battery configuration.
Update Electrical Test Evidence
Incorporate the new internal DC resistance test, pulse-power calculation and constant-power measurement into the edition-specific test plan, using the normative methods and criteria in the purchased text.
Address Durability Parameters
Determine which durability evidence and declarations apply, record test history and conditions, and connect results to product specifications and customer claims.
Manage the 2017-to-2026 Change
Perform a documented gap review of legacy reports, methods and specifications, close gaps and keep the edition explicit across purchasing, test reports, technical files and customer documentation.
Implementation Roadmap
Confirm scope and applicable documents
Record chemistry, vented construction, prismatic format, intended industrial use, configurations, target markets and customer specifications. Identify separate safety, installation, transport, maintenance and environmental rules.
Complete the edition gap review
Compare existing drawings, declarations, reports and methods with the purchased IEC 60623:2026 text, focusing on internal DC resistance, pulse power, constant power and durability parameters.
Test and approve evidence
Approve representative samples, charging and environmental conditions, calibrated equipment, methods, calculations and report templates. Execute the revised plan and resolve deviations before release.
Control production and changes
Link approved evidence to models, drawings, markings, critical materials and manufacturing controls. Reassess changes, maintain traceability and monitor the IEC record for amendments or replacement.
Compliance Checklist
checklist Scope and claims
checklist 2026 edition review
checklist Test evidence
checklist Release and change control
Choosing the Right Nickel-cadmium Standard
Start with construction and intended application; do not select a standard only because the chemistry matches.
| Document | Primary scope | Key distinction |
|---|---|---|
| IEC 60623:2026 | Vented prismatic Ni-Cd cells and batteries for industrial applications | Adds resistance, power and durability evidence in the 2026 edition |
| IEC 60622:2026 | Sealed prismatic Ni-Cd cells and batteries for industrial applications | Includes optional characterization for specified temperature, charging and cycling capabilities |
| IEC 62133-1:2026 | Portable sealed secondary nickel cells and batteries | Portable-product safety scope, not the general industrial scope |
| IEC 62902:2025 | Chemistry identification markings for larger secondary batteries | Marking purpose and size threshold differ from product performance standards |
| Destination-market rules | Legal product, transport, environmental and disposal obligations | Can be mandatory and remain separate from voluntary IEC conformity |
Common Misconceptions
IEC 60623 and IEC 60622 are interchangeable.
They separate vented and sealed industrial nickel-cadmium products and contain edition-specific evidence requirements.
IEC 60623 is a general standard for every industrial battery chemistry.
Its scope is vented nickel-cadmium prismatic cells and battery systems; other chemistries and constructions use other standards.
The IEC catalogue summary contains enough detail to run the tests.
The summary identifies scope and major changes, but the licensed normative text is needed for methods, conditions and acceptance criteria.
A 2017-edition report automatically demonstrates the 2026 edition.
The sixth edition is a technical revision with new test and calculation provisions. Legacy evidence needs a documented gap review.
Penalties & Enforcement
IEC 60623:2026 is a voluntary International Standard and creates no direct legal penalty. Contracts, procurement specifications, certification schemes or national regulations can separately require an edition or supporting evidence. Product, installation, transport, environmental and disposal rules remain separate assessments.
Frequently Asked Questions
What does IEC 60623:2026 cover?
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It covers marking, designation, dimensions, tests and requirements for vented nickel-cadmium prismatic secondary cells and battery systems made from them for industrial applications.
What edition did IEC 60623:2026 replace?
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Edition 6.0 cancels and replaces IEC 60623:2017, the fifth edition. IEC identifies the new publication as a technical revision.
What changed in the 2026 edition?
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IEC's catalogue lists a new internal DC resistance test, pulse-power calculation, constant-power measurement and determination of durability parameters. The purchased text controls the methods and criteria.
What is the difference between IEC 60623 and IEC 60622?
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IEC 60623 addresses vented nickel-cadmium prismatic cells and batteries for industrial applications. IEC 60622 addresses sealed products in the same broad industrial category.
Does IEC 60623 cover every industrial battery hazard or installation rule?
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No. It is a product standard for a defined cell and battery type. Safety, installation, transport, maintenance, environmental and market-access rules must be identified separately.
Is compliance with IEC 60623 legally mandatory?
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Not by itself. It is a voluntary International Standard. A contract, procurement rule, certification scheme or national regulation can separately require it or another edition.
Official Documentation
Official PDF for IEC 60623:2026
Official publication or summary for IEC 60623:2026
Official online resource
International Electrotechnical Commission (IEC) guidance and reference material
Implementation toolkit
Templates, guidance, or companion resources for IEC 60623:2026