As the energy storage and power battery industries expand rapidly, thermal runaway and thermal propagation have emerged as the most significant safety hazards for lithium-ion batteries. This article provides a detailed analysis of thermal safety risks, testing standards, testing challenges, and customized solutions, helping enterprises ensure regulatory compliance in R&D and safe product deployment.
Amidst the rapid growth of the new energy industry, thermal safety remains a core pain point and a top priority. Whether in power batteries, energy storage batteries, or consumer lithium-ion systems, the vast majority of safety incidents stem from risks of fire and deflagration caused by cell overheating, the triggering of thermal runaway, and subsequent chain-reaction thermal propagation.
With the continuous implementation of updated national standards and new regulations on energy storage safety, relying solely on improvements to cell materials is no longer sufficient to meet compliance requirements. Thermal safety testing and validation, testing under non-standard operating conditions, and the establishment of laboratory safety systems have become mandatory prerequisites for new energy enterprises regarding product market entry, project filing, and factory acceptance.
This article systematically breaks down the logic of end-to-end thermal safety management for lithium-ion batteries across four dimensions: industry risks, core mechanisms, testing challenges, and implementation solutions.
I. Why are thermal safety incidents involving lithium-ion batteries so frequent?
Lithium-ion batteries are high-energy-density energy storage systems characterized by complex internal electro-thermal coupling reactions. Once an anomaly occurs, it can easily trigger a chain reaction of risks:
• Overcharging, over-discharging, or short-circuiting leads to excessive localized temperature rise.
• Crushing, nail penetration, or mechanical impact causes internal separator damage and micro-short circuits.
• High/low-temperature cycling and damp-heat aging result in cell performance degradation and reduced thermal stability.
• Thermal runaway in a single cell leads to rapid thermal propagation, triggering chain-reaction fires across the entire battery pack or system.
Industry data indicates that over 60% of safety incidents involving new energy batteries are caused by thermal runaway and thermal propagation; these are also the most rigorously scrutinized items during regulatory inspections and customer factory audits.
II. Mainstream Industry Standards and Test Items for Thermal Safety
Current thermal safety compliance frameworks-used for market access, project filing, and energy storage system acceptance-are primarily based on the following standards:
✅️ GB 38031: Mandatory National Standard for Power Battery Safety
✅️ GB 44240-2024: Mandatory National Standard for Energy Storage Battery Safety
✅️ UN38.3: Thermal Safety and Environmental Reliability Testing for Transport
✅️ Proprietary non-standard operating condition and extreme-environment thermal abuse tests
Core thermal safety test items include:
• Thermal runaway triggering and temperature characteristic testing
• Thermal propagation blocking and pack-level propagation verification
• High/low-temperature shock, thermal cycling, and damp-heat aging tests
• Thermal safety verification for over-temperature, overcharge, and short-circuit conditions
• Durability and thermal stability testing under extreme operating conditions
III. Three Common Challenges Enterprises Face in Thermal Safety Testing
1. Ambiguous understanding of standards and mismatched test protocols: Thermal safety thresholds, test procedures, and pass/fail criteria differ significantly across applications (EVs, energy storage, outdoor equipment). This often leads to situations where a product passes testing but fails to meet filing or acceptance requirements.
2. Standard equipment cannot handle non-standard thermal conditions: R&D testing for new battery chemistries, materials, and structures often requires specific heating rates, temperature control ranges, and time-delayed conditions. Standardized equipment with fixed parameters cannot meet these customized thermal abuse testing needs.
3. Inadequate laboratory safety infrastructure: Thermal testing entails risks involving high temperatures, smoke, and combustible gases. Many enterprises possess the testing equipment but lack the necessary supporting infrastructure-such as explosion protection, ventilation, exhaust gas treatment, and safe facility layout-preventing them from conducting tests in compliance with regulations.
IV. Our Comprehensive Thermal Safety Solution for Lithium Batteries
Leveraging our technical expertise in the new energy industry and upstream manufacturing resources, we provide a one-stop, closed-loop service covering thermal safety testing, non-standard test equipment, laboratory safety construction, and exhaust gas treatment. We precisely address the challenges enterprises face regarding R&D and regulatory compliance:
✅️ Thermal safety testing solutions: We align testing with the relevant national or corporate standards based on product application. We customize comprehensive testing plans-covering thermal runaway, thermal propagation, and thermal cycling/aging-while tracking progress and providing recommendations for rectification and optimization.
✅️ Customized Non-Standard Thermal Safety Test Equipment: Tailored to specific testing conditions, we provide customized solutions-such as thermal runaway test systems, high/low-temperature shock equipment, and full-scale fire simulation platforms for energy storage battery enclosures-to meet the R&D needs of next-generation batteries.
✅️ Comprehensive Thermal Safety Laboratory Planning: Accounting for the high-risk nature of thermal testing, we offer integrated planning services covering explosion-proof layouts, ventilation and smoke exhaust systems, fire safety infrastructure, and safety zoning, ensuring laboratories are compliant, safe, and ready for implementation and official acceptance.
✅️ Environmental Treatment Solutions for Test Emissions: We provide specialized treatment solutions for exhaust gases, smoke, and hazardous volatile compounds generated during thermal testing, ensuring compliance with environmental impact assessment (EIA) standards and daily operational regulations.
V. Safety: The Fundamental Foundation of the New Energy Industry
As industry regulations continue to tighten, thermal safety for lithium-ion batteries is no longer merely a "value-add" feature; it is the baseline requirement for corporate survival and growth. Precise thermal safety testing, suitable test equipment, and compliant laboratory systems serve as the core safeguards for product iteration, market access, and successful project implementation.
