Lithium Polymer Battery Safety: Lessons from the Romoss Incident

The Romoss power bank recall incident sounds an alarm, exposing potential risks in the supply chain of consumer-grade lithium batteries. 

As a manufacturer, A&S Power aims to demonstrate our safety control system through technical transparency, helping global customers 

and consumers understand battery safety scientifically.

I. Core Safety Mechanisms and Risk Analysis

Lithium polymer batteries, featuring aluminum-plastic soft packaging and gel electrolytes, offer 40% higher safety than traditional liquid 

lithium batteries. However, core risks lie in material and process compliance:

Material Thresholds:

Qualified separators must use polypropylene (PP) with a temperature resistance of ≥160°C. Illegitimate replacement with polyethylene 

(PE, ≤130°C resistance) can lead to insulation failure due to thermal stress during long-term use.

Charging voltages exceeding 4.3V increase electrolyte decomposition rate by 300%, causing flammable gas accumulation.

Romoss Lesson:

Lack of supply chain control over material changes allowed low-temperature-resistant separators to enter the market, eventually leading 

to short-circuit risks.

II. Full-value Chain Control: Four-layer Protection + Global Certifications

(A) Quality Foundation Backed by International Certifications

As one of the first manufacturers to obtain ISO 9001 certification, over 200+ A&S Power battery models are accredited with 30+ 

international and domestic certifications, including:

Global Compliance: UL 2054 (USA), CCC (China), UN 38.3 (Transport Safety), CE (EU), RoHS (EU Environmental), CB (IECEE), 

WERCS (Chemical Compliance)

Regional Approvals: PSE (Japan), BIS (India), KC (South Korea)

These certifications form a comprehensive safety network covering raw material environmental protection (e.g., RoHS-restricted 

hazardous substances) and transport safety (e.g., UN 38.3 extreme environment simulation).

(B) Technology-driven Safety Barriers

(1).Cell Manufacturing:

AI-vision inspection ensures coating precision of ±2μm, helium mass spectrometry leak detection guarantees zero leakage

18 mechanical tests (e.g., 1.2m drop) and 12 electrical tests eliminate 0.01% defective products

(2).Intelligent BMS System:

Dual-channel protection cuts off circuits in 0.1ms, voltage detection accuracy of ±1mV (5x industry average)

Real-time estimation of State of Health (SOH) through Kalman filter algorithm

(3).Structural Safety Design:

Aviation-grade aluminum casing withstands 100kg pressure, FireAID™ fireproof module delays flame spread to 3+ hours

Passed UL 9540A thermal runaway test, meeting the strictest US safety standards

III. Safety Guidelines for Global Users

(A) Three Key Purchase Considerations

Certification Check: Look for mandatory certifications (UL 2054 for USA, CE for EU)

Parameter Transparency: Check clearly labeled ratings (mAh, input/output specs) and compliance with IEC 62619 standards

(B) Three Usage Taboos

Avoid use in extreme temperatures (>55°C / <-20°C)

Do not use non-original chargers or charge while using high-power apps

Never disassemble swollen/overheating batteries – risk of 50A+ instantaneous current

(C) Three Emergency Steps

① Power off immediately (long-press 10s + disconnect charger)

② Isolate in explosion-proof bag/metal container

③ Contact A&S Power team for after-sales service

IV. Industry Innovation and Future Directions

In response to supply chain risks, A&S Power is leading supply chain upgrade: Tiered supplier management with annual on-site audits 

and quarterly material testing

Conclusion

Safety is the lifeline of lithium batteries. As a ISO 9001-certified enterprise with 100+ safety certifications, we build defense lines through 

full-value chain control. We call on the industry to uphold quality standards, ensuring every battery becomes a reliable energy partner 

trusted globally.