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CB Certification for Power Banks: IEC 62133-2 Standards, Test Items & Global Market Access
Edit: ANCI 2026-05-15 76
1. CB Scheme Overview & Applicable Standards
The CB Scheme (CB = Certification Body) is operated by IECEE (International Electrotechnical Commission System for Conformity Testing and Certification of Electrotechnical Equipment and Components). Currently, 54 member countries participate, covering Europe, North America, Asia, Oceania, and other major markets.
Applicable Standards for Power Banks
IEC 62133-2:2017 — Secondary cells and batteries containing alkaline or other non-acid electrolytes — Safety requirements for portable sealed secondary lithium cells, and for batteries made from them, for use in portable applications (Part 2: Lithium systems).
IEC 60950-1 — Information technology equipment — Safety (being replaced by IEC 62368-1).
IEC 62368-1 — Audio/video, information and communication technology equipment — Safety (recommended new standard).
Power bank CB certification typically uses IEC 62133-2 as the core standard for lithium-ion battery safety, with optional IEC 60950-1 or IEC 62368-1 for整机 safety testing.
2. IEC 62133-2 Core Test Items
IEC 62133-2:2017 tests cover both cell-level and battery-pack-level safety:
A. Cell-Level Tests
| Test | Purpose | Typical Condition |
|---|---|---|
| Continuous Charging | Verify overcharge protection | Charge to 2.0V/cell, hold 7h |
| Overtemperature | Verify high-temp charging safety | Charge at elevated temperature |
| External Short Circuit | Verify short-circuit protection | External short <5mΩ, 1h |
| Forced Discharge | Verify overdischarge protection | Discharge to 250% initial capacity |
| Mechanical (Drop, Crush, Vibration) | Verify mechanical abuse safety | 1m drop, 13kN crush, vibration sweep |
| Thermal Abuse | Verify high-temp stability | 130°C oven, 30 min |
B. Battery-Pack-Level Tests
- Overcharge Protection: Verify BMS overcharge protection function
- Overdischarge Protection: Verify BMS overdischarge protection function
- Overtemperature Protection: Verify high-temperature protection
- External Short Circuit Protection: Verify pack-level short-circuit protection
- Free Fall: Drop from 1m to hard surface
Note: IEC 62133-2:2017 includes more stringent abuse tests compared to the previous IEC 62133:2012. If the cell supplier already has IEC 62133-2 CB certification, some cell-level tests can be waived.
3. CB Certification Process & Factory Inspection
The CB certification process typically involves:
Step 1: Select NCB and CBTL
NCB (National Certification Body) is the core member of the CB Scheme. CBTL (CB Testing Laboratory) is the testing lab recognized by the NCB. Major NCBs in China include CQC, CVC, TÜV, SGS, UL, etc.
Step 2: Submit Application & Technical Documentation
Provide: product specifications, circuit schematics, PCB layout, BOM (with key component certificates), cell datasheets, battery pack structure, labels, BMS description, etc.
Step 3: Sample Testing
Typical sample requirement: 20-30 cells + 5-10 complete units. Testing duration: 4-6 weeks.
Step 4: Factory Inspection
Verify quality management system, incoming inspection, production control, final inspection, and key component consistency. Factory inspection is required annually.
Step 5: CB Certificate Issuance
Certificate validity: typically 3 years, maintained through annual factory inspections.
4. CB Certificate & Global Market Access
The core value of CB certification lies in mutual recognition across CB Scheme member countries:
| Market | Certification | CB Report Usage |
|---|---|---|
| EU | CE Marking | Convert to EN standard report, sign DoC |
| USA | UL Listing | CB report reduces UL testing |
| Japan | PSE (Round) | Convert to JIS standard, apply PSE |
| Korea | KC Certification | Convert to KS standard, apply KC |
| Australia | RCM | Convert to AS/NZS standard |
| India | BIS Registration | CB report accelerates BIS process |
Note: Each country has National Differences from IEC standards. When converting CB reports, supplementary testing for national differences may be required. It's recommended to test for target market differences during CB certification to avoid re-testing.
Frequently Asked Questions
Q: What is the typical cost and timeline for power bank CB certification?
Cost varies by capacity, complexity, and NCB, typically in the tens of thousands USD range. Timeline: testing 4-6 weeks + factory inspection 1-2 weeks = ~6-8 weeks total. If cells already have CB certification, cost and time can be significantly reduced.
Q: Can CB certification cover multiple models?
Yes. If multiple models share the same cell, circuit design, and similar enclosure structure, series coverage can be applied. Model differences must be documented and evaluated by the NCB. Series coverage significantly reduces certification costs.
Q: What happens if factory inspection fails?
If factory inspection fails, corrective actions and a deadline are provided. The factory must complete corrections, submit a corrective action report, and undergo re-inspection. If re-inspection fails, the CB certificate may be suspended or revoked.
This article is generated with AI assistance. Content is for reference only and does not constitute any certification commitment or legal advice.
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