Precautions and principle analysis of polymer lithium batteries

One pays attention to the short-circuit condition of the polymer lithium battery, and the short-circuit condition is very simple during the charging process. Including: internal short circuit, external short circuit and other conditions. Although most lithium batteries are equipped with short-circuit protection circuits and explosion-proof lines, in many cases, this protection circuit does not necessarily have an effect under various conditions, and the effect of explosion-proof lines is also very limited. 2. Do not overcharge the polymer lithium battery. If the charging time is too long, the possibility of swelling will increase. Lithium’s chemical properties are very active and it burns very simply. When the battery is charged and discharged, the inside of the battery continues to heat up, the gas that occurs during the activation process expands, the internal pressure of the battery increases, and the pressure reaches a certain level. If the outer shell is scarred, it will Bursting, causing liquid leakage, fire, and even blasting. The polymer lithium battery will only swell. When we use it, we must pay attention to safety. Principle Lithium batteries are currently divided into liquid lithium batteries (LIB) and polymer lithium batteries (PLB). Meanwhile, the liquid lithium battery refers to a secondary battery in which Li+ intercalation compounds are positive and negative electrodes. The positive electrode is lithium compound LiCoO2, LiNiO2 or LiMn2O4, and the negative electrode is lithium-carbon interlayer compound LixC6. The typical battery system is: (-)C|LiPF6EC+DEC|LiCoO2(+)Polymer lithium battery positive reaction (oxidation reaction): LiCoO2 u003dLi1-xCoO2+xLi++xe------------(2.1) negative response (recovery response): 6C+xLi++xe-u003dLixC6---------- -(2.2) Total battery response: LiCoO2+6Cu003dLi1-xCoO2+LixC6-----------(2.3)[3] The principle of polymer lithium battery is the same as that of liquid lithium, the main difference is the electrolyte It is different from liquid lithium. The primary structure of a battery includes three elements: positive electrode, negative electrode and electrolyte. The so-called polymer lithium battery means that at least one or more of these three primary structures use polymer materials as the primary battery system. In the polymer lithium battery system developed today, polymer materials are primarily used in the positive electrode and electrolyte. Cathode materials include conductive polymer or inorganic compounds used in general lithium batteries. The electrolyte can use solid or colloidal polymer electrolytes, or organic electrolytes. General lithium ion technology uses liquid or colloidal electrolytes, so it needs to be strong. The secondary packaging to contain combustible active ingredients, which adds weight, and other constraints also restrict the flexibility of size. The new generation of polymer lithium batteries can be thinner in shape (the thinnest ATL battery can reach 0.5 mm, which is equivalent to the thickness of a card), arbitrary area and arbitrary shape, which greatly improves the battery shape planning. Flexibility can then cooperate with product requirements to make batteries of any shape and capacity, providing equipment developers with some planning flexibility and adaptability in power processing methods to maximize their product functions. At the same time, the unit energy of the polymer lithium battery is 20% higher than that of the current general lithium battery, and its capacity, and environmental protection functions are all compared with lithium batteries, and there are some improvements. 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: Interpretation of the core technology of Tesla Battery Day. Is it an innovator or a follower?