Lithium-ion batteries are widely used in energy storage, UPS systems, and various industrial applications. To ensure long-term safety and performance, proper storage is essential. EverExceed provides professional guidance on the safe storage of lithium-ion batteries to help customers minimize risks and maintain reliability.

Storage Requirements and Recommendations
Ambient Temperature

dian Optimal: 10℃–25℃
Acceptable range: -20℃–35℃ (Avoid extreme high temperatures >50℃ or low temperatures <0℃)
Reason: High temperatures accelerate aging, self-discharge, and may even cause thermal runaway. Low temperatures can reduce performance or cause damage.

Humidity
Recommended: Relative humidity ≤60% (or within 65±20%)
Reason: Excess humidity may cause rust or leakage of metal components.

State of Charge (SOC)
Long-term storage: 50%–70% (approx. 3.6V–3.9V, depending on cell chemistry)
Reason: Over-discharge due to self-discharge may damage the cell, while high SOC accelerates material aging and increases risk.

Placement and Spacing
Avoid stacking too high (no more than 3 layers recommended).
Maintain spacing (≥10cm) between batteries and ensure terminal insulation.
Reason: Prevents short-circuits, pressure damage, and allows proper ventilation and heat dissipation.

Zoning and Labeling
Store new and old batteries separately.
Keep intact and damaged batteries in different zones.
Never store with flammable materials.

Reason: Facilitates management and reduces risk.

Charging in Storage Area

Prohibited: Do not perform charging or discharging tests in storage areas.
Reason: Charging carries higher risks and should only be conducted in designated, monitored zones.

Long-Term Storage
For storage longer than 6 months:
Adjust SOC to 50%–70%.
Check SOC approximately every 3 months and recharge if necessary.
Reason: Prevents irreversible capacity loss due to over-discharge.

Safety Facilities and Emergency Preparedness

Fire Safety: Storage areas should be equipped with Class D extinguishers (for lithium-metal fires). For lithium-ion battery fires, ABC dry powder extinguishers, CO₂ extinguishers, or fire blankets can be used for initial control. Large-scale fires may require extensive water cooling.
Monitoring: Install temperature monitoring and alarm systems if possible. Establish inspection routines (e.g., every 2 hours) to identify abnormalities early.
Emergency Plan: Develop an emergency response plan. If smoke or fire occurs:
Immediately activate ventilation.
Use ABC dry powder extinguisher or sand to control fire.
Do not directly use water for small fires (though firefighters may apply large amounts of water for cooling in large-scale lithium-ion battery fires).

Evacuate nearby personnel and report to local fire authorities, specifying it is a lithium-ion battery incident.

At EverExceed, we are committed to delivering not only advanced energy storage solutions but also complete safety guidance for our customers worldwide. By following the above best practices, users can maximize the lifespan of their lithium-ion batteries while minimizing operational risks.