Introduction to the types of lithium batteries

Currently, there are two types of secondary batteries used in the market: nickel-metal hydride (Ni-MH) and lithium-ion (Li-ion). Lithium batteries are currently mass-produced in liquid lithium batteries (LiB) and polymer lithium batteries (LiP). Therefore, in many cases, the battery marked with Li-ion must be a lithium battery. But it is not necessarily a liquid lithium battery, it may also be a polymer lithium battery. Lithium battery is an improved product of lithium battery. Lithium batteries have existed for a long time, but lithium is a highly active metal (remember its position in the periodic table?). It is not safe to use and often burns and bursts when charging. Circumstances, later there were improved lithium batteries, adding active ingredients (such as cobalt, manganese, etc.) that can suppress the lithium element, and then making lithium batteries truly safe, efficient and convenient, and the old lithium batteries are also fundamental Screened on. As for how to distinguish between them, it can be recognized from the battery logo, lithium batteries are Li and lithium batteries are Li-ion. At present, the so-called lithium batteries used in notebooks and mobile phones are actually lithium batteries. The basic structure of modern batteries includes three elements: positive electrode, negative electrode and electrolyte. As a kind of battery, lithium battery has these three elements the same. Generally, lithium-ion technology uses liquid or inorganic colloidal electrolyte, and therefore requires a solid shell to contain the combustible active ingredients, which increases the weight and cost of the battery, and also limits the flexibility of scale and shape. Generally speaking, the minimum thickness of a liquid lithium ion secondary battery is 6mm, and it is more difficult to reduce it. The so-called polymer lithium battery uses polymer materials as its primary battery system in at least one or more of these three primary structures. The new generation of polymer lithium battery has a high degree of polymerization, so the shape can be thinner (the thinnest 0.5 mm), arbitrary area and arbitrary shape, which greatly improves the flexibility of battery shape design It can be made into batteries of any shape and capacity according to product requirements. At the same time, the unit energy of the polymer lithium battery is 50% higher than that of the current general lithium battery, and its capacity, charge and discharge characteristics, safety, operating temperature range, cycle life, and environmental protection performance are significantly greater than that of lithium batteries. improve. Disclaimer: Some pictures and content of articles published on this site are from the Internet. If there is any infringement, please contact to delete. Previous: What are the common problems and solutions for power lithium-ion batteries?