There is still a lot to learn before we use lithium as an energy source. Nothing is more important than safety. You have to be careful no matter what battery, don’t you think? Start sharing your knowledge before the formal test

What are the common bad phenomena of batteries?

The positive and negative electrodes of the battery are in contact with the metal

External short circuit fire

Appearance damage (scissors, perforations)

The battery was hit (falling down, falling down)

1. Why is the battery bulging?

Overcharge, over discharge, use of electrical equipment, etc.

Storage time is too long (more than 15 days)

long-term storage at high temperature,

external short circuit

The protection board discharges itself, causing the battery to over-discharge

puncture, crush

The kneading process is used, or the welding time is too long

The working current exceeds the nominal value of the battery, which causes the battery to be overloaded, which leads to damage and swelling of the battery

2. When is the battery pressure low or low?

Battery capacity, internal resistance, voltage mismatch

Welding short circuit, ignition, causing large self-discharge

External damage: knock, deformation, etc.

Internal micro short circuit, resulting in large self-discharge

The battery pack may be overcharged, overdischarged or overdischarged during use.

Note: If all the batteries in the battery pack have low voltage or zero power at the same time, it is mostly a non-battery quality problem, such as high self-consumption of the protection board or excessive discharge of the battery pack during operation.

3. The battery is not charged or the charging time is too long

Welding false welding, internal resistance

Protection board is damaged

The voltage difference of a single battery in the lithium battery pack is too large or zero

The charger is defective or damaged

4. How did the battery catch fire?

Overcharge and over discharge

Battery damage caused by external force (such as punctured, dropped)

External short circuit: short circuit of anode, cathode and protection board devices

Internal short circuit: dust or burrs pierce the diaphragm

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