1. What causes battery swelling and bulging?

Overcharging and overdischarging

Overcharging: Continued charging after the battery is fully charged may cause excessive lithium ion intercalation into the negative electrode, form lithium dendrites, raise internal pressure and result in bulging.

Overdischarging: Excessive discharge damages the Solid Electrolyte Interphase (SEI) film of negative electrode materials, causing collapse of negative electrode materials and battery bulging as well.

High-temperature environmentsHigh temperatures accelerate internal chemical reactions inside the battery, generating large amounts of gas and increasing internal pressure.

Physical damageImpacts or extrusion on the battery may damage its internal structure, cause short circuits or electrolyte leakage, and subsequently lead to bulging.

Production defectsMaterial or technological defects during battery production may destabilize battery performance and raise the risk of bulging.

Using inferior chargersLow-quality chargers cannot accurately regulate current and voltage, which may cause uneven charging or overcharging and trigger battery bulging.

Long-term idle storageIf a battery is left unused for a long time without proper storage, its performance will degrade and short circuits may even occur.

In summary, battery bulging is caused by multiple factors including charging habits, operating environment and product quality. Understanding these causes helps adopt proper preventive measures and ensure battery safety.

2. Are there ways to prevent battery swelling and bulging?

Use the battery strictly in accordance with the battery specification sheet.

3. Will battery bulging cause fire?

Fire will not occur without artificial damage after the battery swells.

4. Can a high-speed mobile phone charger be used to charge this battery?

This is a conventional battery, not a fast-charging battery. Charging it with fast-charging equipment will damage the internal structure of the battery.