How to safely handle bulging lithium polymer batteries?

The phenomenon of lithium batteries bulging is commonly referred to as the "bulging" situation in the industry. The cause is often due to 

internal chemical reactions, which lead to the continuous accumulation of gas inside the battery, ultimately causing the battery to expand 

and deform. During the bulging process, the integrity of the battery is highly likely to be damaged, which may lead to serious consequences 

such as battery leakage, fire, and even the risk of explosion. Therefore, safe and proper handling of such bulging batteries is of great 

significance and importance for preventing environmental pollution and avoiding personal injury.

Why do lithium batteries bulge?

The occurrence of bulging in lithium polymer batteries is related to many factors such as the quality, usage methods, and environment 

of the lithium battery. We have summarized the following reasons:

1.Poor packaging: During the production process, air humidity enters the interior of the battery cells, causing the electrolyte to decompose 

and produce gases.

2.Corrosion problem: When lithium polymer battery cells corrode, the aluminum layer will be consumed due to chemical reactions, losing 

its water blocking effect and causing gas swelling.

3.Excessive water content in battery cells: During this process, if the water content exceeds the standard, the electrolyte will fail and 

produce gas.

4.Surface damage: External force damage or puncture can cause moisture to enter the interior of the battery cell.

5.Impact effect: Aluminum material is prone to deformation. Even with slight impact, the larger the battery cell, the larger the internal air 

pockets, and the more likely it is to be damaged.

6.Short circuit situation: Contact between the positive and negative electrodes can cause a short circuit, causing the lithium polymer 

battery cell to bulge and even smoke.

7.Internal short circuit: Shrinkage, curling, damage to the battery isolation film, as well as burrs piercing the isolation film, can all cause 

internal open circuits, leading to bulging.

8.Overcharging/Over discharging: Polymer batteries that are overcharged or over discharged, coupled with abnormal protective plates, 

can cause severe bulging of the battery cells.

How to deal with bulging lithium polymer batteries?

1.Isolation and safety measures

Isolation and safety measures are crucial when dealing with lithium polymer (LiPo) batteries with bulges. Due to the potential risks of 

leakage, fire, or explosion associated with these batteries, they may cause serious harm.

2.Isolation measures

Firstly, it is necessary to isolate the bulging battery in a safe and controllable environment to minimize the risk of accidents. Be sure to 

wear appropriate protective equipment, such as gloves and goggles, to prevent direct contact with any leaked chemicals.

3.Transportation and storage

Extra caution should be taken when transporting lithium polymer batteries with bulges to avoid accidents during transportation. Use 

fire-resistant containers to hold batteries, which should be able to accommodate any fire or leakage that may occur from damaged 

batteries. Store the container in a cool, dry place, away from direct sunlight and heat sources.

4.Recycling project

Using specialized battery recycling projects or recycling facilities that can receive damaged lithium batteries is a safe and responsible 

method of disposal. Many recycling centers have professional knowledge and resources to safely handle damaged batteries and prevent 

environmental pollution.

conclusion

The safe handling of bulky lithium polymer batteries requires caution, prioritizing safety and environmental responsibility. Isolation, safe 

operation, proper transportation, and utilization of recycling projects are key steps in preventing accidents, avoiding environmental pollution, 

and preventing personal injury. Be sure to follow the recommended guidelines and seek professional help if you have doubts about handling 

damaged batteries.