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Reasons for the Bulging of Lithium Batteries and Whether Bulging Lithium Battery Packs Can Still Be Used

In recent years, lithium batteries have been widely used in the market due to their high energy density, high safety, and other reasons. Although the safety of lithium batteries is much higher than that of lead-acid batteries and others, there are still certain safety hazards if they are not used properly or if the manufacturing level is not up to par, such as the problem of bulging.

There are mainly two reasons for the bulging of lithium batteries. One is the problem with the manufacturers' production. Poor production environments, old production equipment, etc., can lead to uneven coatings on the batteries and the mixing of dust particles in the electrolyte. All of these may cause the lithium battery packs to bulge when used by users, and even pose greater risks.

The other reason lies with the users themselves. If users do not use lithium battery products properly, such as overcharging, overdischarging, or continuously using them in extremely harsh environments, it is also possible for the lithium batteries to bulge.

In addition to the above two main reasons, there is a relatively rare reason. That is, if the battery is not used for a long time and is not properly stored. When it is left exposed to the air for a long time without being used and is fully charged, since air is conductive to a certain extent, leaving it for too long is equivalent to direct contact between the positive and negative electrodes of the battery, resulting in a chronic short circuit.

The main principle of the bulging of lithium batteries is that a violent reaction similar to a short circuit occurs inside the battery, generating a large amount of heat, which then causes the electrolyte to decompose and vaporize, and the lithium battery will bulge.

Can a Bulging Lithium Battery Pack Still Be Used?

When the problem of bulging occurs in a lithium battery pack, it is best not to continue using such a faulty battery. Because the battery cells have expanded, and when the expansion reaches a certain limit, it may cause an explosion, which is extremely dangerous. For your own safety, it is best to replace the lithium battery pack as soon as you notice the bulging phenomenon.

How to Deal with Bulging Lithium Battery Packs?

For the safety of users, bulging lithium battery packs are no longer suitable for continued use because crystals have formed inside them and there is not much usable capacity left.

Lithium battery packs generally require professional recycling treatment to avoid polluting the environment. Therefore, it is best to discard them at a professional lithium battery pack treatment facility. If there is no such place locally, the best way is to throw them into the classified recycling trash bin for used batteries.

In general, by purchasing lithium battery packs produced by regular manufacturers and paying attention to the usage methods during the use process, the occurrence of the bulging problem can be avoided to the greatest extent.

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