中关村储能产业技术联盟·2025-08-01 05:33Core Viewpoint - The implementation of the mandatory national standard GB 44240-2024 for lithium batteries and battery packs used in energy storage systems marks a significant advancement in safety requirements, transitioning from a "recommended" to a "mandatory" status, thereby establishing legal constraints for market entry [2][3]. Summary by Sections Standard Overview - GB 44240-2024 is recognized as the highest specification for energy storage safety standards, encompassing 23 rigorous tests including vibration, impact, puncture, and forced discharge [2][3]. - The standard applies to lithium batteries and battery packs in various energy storage applications such as telecommunications, emergency lighting, and photovoltaic systems [2]. Testing Requirements - New testing requirements at the cell level include vibration, impact, puncture, and forced discharge, with stricter safety testing protocols [3]. - The standard increases the duration of overcharge testing, adding a requirement for constant voltage overcharge for 1 hour, which correlates with increased safety risks [3]. Testing Procedures - Detailed charging and discharging procedures are provided for manufacturers to conduct tests, ensuring consistency and reliability in testing methods [4][5]. - The testing environment specifies conditions such as temperature and humidity to ensure accurate results [7]. Safety Conditions - The standard outlines conditions for thermal runaway tests, including specific criteria for determining if a battery has experienced thermal runaway [8][9]. - Batteries must not catch fire or explode under specified overcharging conditions, ensuring enhanced safety measures [11][15]. Compliance and Certification - The first batch of 15 companies with 21 products has successfully passed the GB 44240-2024 testing, indicating early compliance with the new mandatory standards [18][22]. - The list of compliant companies includes major players such as CATL and other notable battery manufacturers [18][22]. Future Events - A forum on sodium-ion battery industry standards is scheduled for September 16-18, 2025, indicating ongoing developments in battery technology and standards [21][23].