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Editor:ESTL Category:Certification information Release time:2026-10-26 Click volume:6
IEC 62619 for Energy Storage Batteries: Key Certification Points and Timeline Budgeting
A standard-applicability briefing for storage battery manufacturers, system integrators and exporters: how the levels are divided, what changed in the 2022 edition, and how to plan the timeline and documentation.
Lithium-ion batteries for stationary storage, telecom backup, UPS and other industrial scenarios are usually assessed against IEC 62619, and the current edition is IEC 62619:2022 (second edition, published on 24 May 2022). Assessment is carried out separately at the cell, battery and battery system levels, and a cell report cannot substitute for battery-level requirements. The 2022 edition added the thermal propagation test, BMS functional safety, overcurrent protection and EMC requirements. With complete documentation, the period from project opening to report is about 6 to 10 weeks, and applying for a CB certificate at the same time adds another 2 to 3 weeks.
In storage battery exports and domestic project tenders, IEC 62619 is among the safety standards cited most frequently. Published by the International Electrotechnical Commission (IEC), it is titled Secondary cells and batteries containing alkaline or other non-acid electrolytes — Safety requirements for secondary lithium cells and batteries, for use in industrial applications. It covers lithium-ion cells, batteries and battery systems in industrial applications and sets out functional safety related requirements for battery management systems (BMS).
Look at how the product is used: fixed installations, backup power and industrial vehicles correspond to IEC 62619; products carried on the person correspond to IEC 62133-2; traction batteries for road vehicles correspond to the IEC 62660 series. Which standard a product falls under is determined by its end application and the purchaser's requirements.
| Storage-related scenario | Relevant standard | Notes |
|---|---|---|
| Grid-side / C&I / residential storage, containerized storage | IEC 62619 | The primary standard for industrial lithium battery safety |
| UPS, telecom base station backup, data centre backup | IEC 62619 | Stationary backup scenarios usually rely on this standard |
| Portable power supplies, outdoor power stations | IEC 62133-2 | Portable electronic products and equipment; not an industrial scenario |
| Electric forklift and AGV batteries | IEC 62619 | Batteries for industrial mobile equipment are within scope |
| Traction batteries for road vehicles | IEC 62660 series | Where the two apply in parallel, the vehicle standard takes precedence |
| Whole-system level of storage systems | IEC 63056 and others | System-level requirements are often used together with IEC 62619 |
IEC 62619 assesses products by level, and the test content at the three levels differs; none can substitute for another.
| Category | Typical items | What is assessed |
|---|---|---|
| Electrical safety | Overcharge, external short circuit, forced discharge, overdischarge | No fire or explosion under abnormal electrical conditions |
| Mechanical safety | Crush, impact, drop, vibration, shock | No leakage, fire or explosion after mechanical stress |
| Environmental safety | Temperature cycling, high temperature use, low pressure, damp heat | Thermal stability and seal integrity |
| Thermal safety | Thermal abuse | Whether failure behaviour is controllable above the maximum operating temperature |
| Item | Assessment points |
|---|---|
| Overcharge / overdischarge protection | Verify that protection operates at battery level; record operating time and state |
| External short circuit / overcurrent protection | Short-circuit current interruption capability and temperature rise; whether protection triggers correctly under abnormal current (new in 2022) |
| Thermal propagation | After triggering thermal runaway in a single cell, whether the failure is contained within the system boundary (strengthened in 2022) |
| BMS functional safety | Monitoring logic, fault detection and cut-off response, safe state after communication failure |
| EMC | BMS protection functions are not falsely triggered or lost under external electromagnetic interference (new in 2022) |
| Structure and marking | Terminal connections, insulation and wiring, protection of hazardous live parts, marking and installation information |
Overcharge protection, overdischarge protection, external short circuit, overcurrent protection and BMS-related requirements at battery level must be performed again at battery or system level. When purchasers review reports they usually check which level the report corresponds to, and a report at the wrong level cannot be used for tenders or delivery.
IEC 62619:2022 moves the focus of assessment from "cells and batteries" towards "battery systems", with changes concentrated in system-level safety design. For storage projects, the direct impact falls on structural design and BMS documentation.
| New direction | Content | Impact on storage projects |
|---|---|---|
| Thermal propagation | The propagation test is formally incorporated, with an added laser-triggered method | Module and rack level structures need design addressing the propagation path; sample preparation increases |
| BMS functional safety | New safety analysis requirement, which may follow frameworks such as IEC 61508 and ISO 13849 | BMS architecture, monitoring logic and fault response descriptions must be submitted |
| Overcurrent protection | Verify that protection operates correctly under abnormal charge and discharge current | Protection thresholds and response times must match the design documentation |
| EMC | Confirm that BMS protection functions are not affected by external electromagnetic interference | Immunity design enters the assessment and can be tested on the end product |
| System lock and safe state | After a fault, enter a stop state that the user cannot reset | Software logic must be designed so it does not self-recover after a fault |
| Structure and installation | Moving parts, hazardous live parts, terminal connections, installation and storage information | Structural design and installation manuals need corresponding additions |
A change of standard edition does not automatically mean that an existing test report loses its meaning. Whether a report is accepted depends on the specific requirements of the purchaser, platform, regulator or certification body in the target market. We suggest confirming with the accepting party which edition it accepts first, and then assessing whether gap testing is needed, so as to avoid unnecessary repeat testing.
Establish whether the product is a cell, a battery or a battery system, and clarify the end application and the acceptance requirements of the target market.
Where reports to other standards or to the earlier edition exist, compare test scopes item by item to establish the items to be supplemented, avoiding a full round of retesting.
Datasheets, BMS design and fault logic descriptions, structural drawings, key component lists and marking documents; prepare samples according to the plan.
Cell level first, then battery and system level; thermal propagation and BMS functional safety have the longest lead times and should be scheduled early.
After testing passes, the report is compiled and reviewed; where nonconformities arise, the product is adjusted in line with the laboratory's comments and retested.
Where multi-country access is needed, apply to an NCB for a CB certificate based on the report, then supplement national differences as required by the target country to convert into local approvals such as CE and KC.
Overall range from project opening to report, assuming complete documentation and no nonconformities
Additional review time to apply for a CB certificate after the report is complete, depending on NCB scheduling
Additional time for a single retest; it may be longer if new samples are required
Large-capacity storage battery system samples are bulky, charge and discharge cycling takes a long time, and multiple batches cannot easily run in parallel, which are the main factors that extend the timeline. Where a tender or grid-connection date is fixed, we suggest moving the testing forward to the design freeze stage.
| Category | Content |
|---|---|
| Product technical documentation | Cell and battery datasheets, rated parameters, series and parallel configuration and assembly method |
| BMS documentation | Architecture description, monitoring and protection logic, fault response strategy, communication protocol, software version description |
| Structural and electrical documentation | Structural drawings, terminal and wiring descriptions, insulation design, key component list and certificates |
| Marking and instructions | Nameplate and label artwork, installation manual, safety warning content |
| Samples | Cells and battery/system samples identical to production status, in quantities confirmed per project |
Using IEC 62133-2 for grid-connected storage or telecom backup batteries results in test items and acceptance logic that do not match, and the report cannot be used in the target market. Confirm the end application before submitting.
Protection functions, BMS, EMC and thermal propagation at battery level must be assessed independently at battery or system level, and a cell-level report cannot replace them.
The North American market relies primarily on UL 1973, UL 9540 and similar standards, which differ in areas such as BMS redundancy, single-fault tolerance and contactor weld detection. A CB report can serve as a technical basis, but the differing items usually need supplementary testing.
The 2022 edition brings BMS functional safety into scope. Missing architecture descriptions, fault response logic or communication failure handling directly slow progress, so they should be prepared alongside the hardware documentation.
Whether at cell, battery or system level, we can provide technical support for standard determination, gap analysis, test execution and CB conversion. Tell us your product type, target market and key dates, and we will set out the corresponding plan and schedule.
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