How to distinguish between old and new lithium-ion battery packs?

In order to determine whether a lithium-ion battery pack is an empty battery that should be discarded, people can throw the battery down 20 cm from the ground. If the rebound of the battery after hitting the ground is high, then the battery is an empty battery. It turns out that it is a new battery. This incident aroused the interest of scientists. They conducted verification in the laboratory from the beginning, using a slow-motion camera to record the trajectory of empty batteries and new batteries falling from the table. The effect confessed that the height of the empty battery bounced from the ground is simply higher than the height of the new battery bounced. In order to further verify the fairness of this statement, American researchers have conducted more and more in-depth studies. The researchers let two lithium-ion battery packs fall in a plexiglass tube, and in the process measured the first and second rebound heights. In addition, researchers are also trying to add several comparison groups: three separate batteries with 70%, 80%, and 90% power. In the end, try to confess that whether it is an ordinary disposable battery or a lithium-ion battery, as long as the battery has half of its power, it can be lifted by the ground to a certain height, except for the height difference. Researchers have shown this phenomenon that the positive electrode of a household battery is composed of zinc elements, which are present in the battery gel. The battery gel will reduce the attack strength of the fully charged battery by the ground impact, so the fully charged battery will often not be bounced by the ground. In the process of battery discharge, the large amount of zinc contained in the battery reacts with oxygen to form zinc oxide. This substance is a rigid substance that can make the battery's rebound height higher. Disclaimer: Some pictures and content of the articles published on this site are from the Internet. If there is any infringement, please contact to delete. Previous post: What are the basics of repairing lithium-ion battery shields?