Common Safety Hazards And Preventive Measures of 18650 Lithium Batteries

Common safety hazards and preventive measures of 18650 lithium batteries

18650 lithium batteries are widely used in laptops, power tools, electric vehicles and other fields due to their high energy density, long cycle life and stable performance. However, improper use and storage methods may cause safety hazards to lithium batteries, and even cause serious accidents such as fire and explosion. This article will analyze the common safety hazards of 18650 lithium batteries in detail and provide corresponding preventive measures to help users use lithium batteries safely.

1. Common safety hazards of 18650 lithium batteries

Overcharge: When the battery charging voltage exceeds its upper limit, it will cause the internal chemical reaction of the battery to get out of control, generate a lot of heat and gas, which may cause the battery to swell, leak or even catch fire and explode.

Overdischarge: When the battery discharge voltage is lower than its lower limit, it will cause damage to the internal structure of the battery, reduce capacity, increase internal resistance, and in severe cases, it may cause the battery to be unable to charge or short-circuit.

Short circuit: When the positive and negative poles of the battery are in direct contact, a huge current will be generated, causing the internal temperature of the battery to rise rapidly, which may cause fire or explosion.

High temperature: High temperature environment will accelerate the internal chemical reaction of the battery, resulting in a decrease in battery capacity, shortened life, and even thermal runaway, causing safety hazards.

Mechanical damage: When the battery is subjected to mechanical damage such as squeezing, impact or puncture, it may cause internal short circuit of the battery and cause safety accidents.

2. Preventive measures: safe use, prevent accidents before they happen

In order to avoid the safety hazards of 18650 lithium batteries, users need to take the following preventive measures:

Use original or branded chargers: Poor quality chargers may have problems such as overcharge protection failure. It is recommended to use original or branded chargers to charge the battery.

Avoid overcharging and over-discharging: Avoid charging for a long time when charging, and unplug the charger in time after full; avoid exhausting the battery when discharging. It is recommended to charge when the remaining power is 20%-30%.

Prevent short circuit: When storing and using batteries, avoid contact between the positive and negative poles of the battery with metal objects. You can use a battery box or insulating tape for protection.

Control temperature: Avoid exposing the battery to high temperature environments, such as direct sunlight, high temperature in the car, etc.; when charging and using, pay attention to the battery temperature. If the temperature rises abnormally, stop using it immediately and check the cause.

Avoid mechanical damage: When using and storing the battery, avoid mechanical damage such as squeezing, impact or puncture.

Regular inspection: Regularly check the appearance of the battery for damage, deformation, leakage, etc. If abnormalities are found, stop using it immediately and dispose of it properly.

Proper storage: Batteries that are not used for a long time should keep their power at around 40%-60% and store them in a cool and dry environment.

3. Safe handling: Used batteries should be properly disposed of

Used 18650 lithium batteries still have safety hazards and need to be safely handled according to the following methods:

Discharge treatment: You can use a small light bulb or resistor and other loads to discharge the battery.

Insulation treatment: Use insulating tape to wrap the positive and negative poles of the battery to prevent short circuits.

Classified recycling: Send used batteries to designated recycling points for centralized processing.

IV. Conclusion

The safe use of 18650 lithium batteries is related to personal and property safety. Users need to fully understand the safety hazards of lithium batteries and take effective preventive measures to avoid safety accidents. I hope that the safety guide provided in this article can help you use 18650 lithium batteries safely and enjoy the convenience brought by technology.