Composition, Safety Detection and Solution of Lithium Battery Package

ithium battery pack is mainly composed of positive, negative, electrolyte, diaphragm, external connection and packaging components. Among them, the positive and negative electrodes contain active electrode materials, conductive agents, binders, etc., which are uniformly coated on copper foil and aluminum foil collectors.            In the process of charging, lithium is removed from the positive electrode in the form of ions, transmitted by electrolyte through the diaphragm, and embedded in the negative electrode. Outside the battery, electrons migrate from the external circuit to the negative electrode. In the process of discharge, lithium ions in the battery are detached from the negative electrode, penetrated through the diaphragm, and embedded into the positive electrode. Outside the battery, electrons migrate from the external circuit to the positive electrode. With charging and discharging, the "lithium ion" migrates between batteries rather than the "lithium" element. Therefore, batteries are called "lithium ion batteries".            2. Potential safety hazards of lithium batteries            Wechat Picture _20180821110839.png            Generally speaking, the safety problems of lithium battery packs are combustion or even explosion. The root of these problems lies in the thermal runaway inside the battery. In addition, some external factors, such as overcharge, fire source, extrusion, puncture, short circuit and so on, can also lead to safety problems.