What does it mean to divide the capacity of a lithium battery?

What is a lithium battery? What is the meaning of the capacity of a lithium battery? What is a lithium battery? What is the meaning of a lithium battery capacity? A lithium battery is a battery made of lithium metal or lithium alloy as the negative electrode material and a non-aqueous electrolyte solution. . In 1912, Gilbert n Lewis first proposed and studied lithium metal batteries. In the 1970s, M.S. Whittingham proposed and began to study lithium batteries. Because metal lithium has very active chemical properties, the production, storage and use of metal lithium have high requirements on the environment. Therefore, lithium batteries have not been used for a long time. With the development of science and technology, lithium batteries have become the mainstream. Lithium batteries can be roughly divided into two types: metal lithium batteries and lithium batteries. Lithium batteries do not contain metallic lithium and can be recharged. The fifth-generation rechargeable battery lithium metal battery was born in 1996, and its safety, specific capacity, self-discharge rate and performance ratio are better than lithium batteries. Due to its own high-tech requirements, only a few companies in a few countries are manufacturing lithium metal batteries. Lithium battery capacity: simple understanding is capacity sorting, performance screening and classification. The splitting ability of the battery is completed by the composition of the container (because of the same basic principle and splitting ability, the cabinet with the same integrated functional components and splitting ability is called the composition of the container), and the function of the differentiated container is actually like a charging It can charge and discharge a large number of batteries at the same time. When dividing the battery volume, the data of each detection point is obtained through computer management, so as to analyze the battery capacity, internal resistance and other data to determine the quality level of the battery. This process is volume segmentation. After the battery is separated for the first time, it should be left for a period of time, generally not less than 15 days, during which some inherent quality problems will occur. For example, the self-discharge is too large, the internal resistance is too large and so on. After the static period is over, check the volume again, the volume is not up to the standard, and the quality problem needs to be eliminated. Another purpose of volumetricization is to classify and group batteries, that is, to screen out monomers with the same internal resistance and combination capabilities. When they are combined, only those with similar performance can form a battery pack. For example, in order to meet the energy demand of electric vehicles, power lithium-ion battery packs often require tens to thousands of batteries. Due to the complexity of the system, the battery pack has its own unique behavior. It is not a simple addition and subtraction of a single battery to obtain the performance of the battery pack. Take our common series and parallel battery packs as an example.Under ideal conditions, a single battery battery should be exactly the same, but in fact, even the single battery processed in the same batch has performance differences (including capacity, Internal resistance and other factors). Although the battery pack is screened before it is formed, there is no guarantee that the performance of all batteries is 100% consistent. In addition, due to the influence of the volume of the battery pack, the heat dissipation characteristics of different parts are very different, so the battery pack also has a larger temperature gradient in the temperature distribution. All of the above factors will cause the batteries in the battery pack to drop at an inconsistent speed during use, which will lead to a decrease in the available capacity of the battery pack (limited by the minimum capacity of the battery pack when connected in series). On the other hand, it may lead to the safety of the battery pack. Studies have shown that even if the cycle life of a single battery can reach more than 1,000 times, if the battery pack is formed without the protection of the equalization device, the cycle life of the battery pack may be less than 200 times. Therefore, the consistency of a single battery is a very important parameter of the battery pack. Disclaimer: Some pictures and content of articles published on this site are from the Internet. If there is any infringement, please contact to delete.