I. Core Framework of the IEC Certification System

IEC 62619

IEC 62933-5-2

IEC 62933-5-2

IEC 62485-2

II. In-depth Analysis of Key Standards

1. IEC 62619 — The "Safety Threshold" for the European Market

IEC 62619 includes system-level functional safety assessment (Annex B), requiring the BMS to have redundant protection logic (such as dual overvoltage protection).

2. IEC 62620 — Performance Verification and Warranty Basis

Purpose: Unlike the safety "Pass/Fail" of 62619, 62620 provides a performance benchmark, serving as the technical basis for your company to sign cycle life warranty contracts with European and American customers.

Core Tests:

25°C Cycle Life: 0.5C charge/discharge, >80% capacity retention cycle count (your company's LFP should commit to >6000 cycles)

High Temperature Performance: Capacity retention >95% at 45°C (essential for the Italian/Spanish market)

Storage Performance: Capacity recovery rate >90% after 28 days of storage at 55°C

3. IEC 62933-5-2 — "System Integration Certificate" for Energy Storage Systems

Positioning: Targeting ESS energy storage systems (distinct from cells/modules), corresponding to your company's UL 9540, but with different systems.

Key Requirements:

EMC (Electromagnetic Compatibility): Must meet IEC 61000-6-2 (Immunity) and IEC 61000-6-4 (Emission).

Functional Safety (SIL): The energy storage system must have SIL 2 (Safety Integrity Level) emergency shutdown capability. Your company's BMS must comply with IEC 61508 or ISO 13849.

Grid Adaptability: Must meet IEC 61727 (Grid Connection Requirements) and IEC 62116 (Anti-Islanding).