Analysis of the advantages and disadvantages of ternary polymer lithium batteries

Advantages of ternary polymer lithium battery: a relatively balanced material in terms of capacity and safety, and better cycle performance than normal lithium cobalt oxide. In the early stage, due to technical reasons, its nominal voltage is only 3.5-3.6V, which is limited in the scope of use. But so far, with the continuous improvement of the formula and the perfect structure, the nominal voltage of the battery has reached 3.7V, and the capacity has reached or exceeded the level of lithium cobalt oxide batteries. 1. The energy density of ternary lithium battery is high, which can exceed 200WH/Kg. 2. The voltage platform is high: the voltage platform is an important indicator of the battery energy density and determines the basic efficiency and cost of the battery. Therefore, the selection of battery materials is important significance. The higher the voltage platform, the greater the specific capacity, and certainly the same size, weight, and even the same ampere-hour battery, the higher the voltage platform of the ternary material lithium battery has a longer range. 3. The biggest feature of the ternary polymer lithium battery is that the unit electric energy is relatively large, which is the result of comparison with the lithium iron phosphate battery. However, a major disadvantage of the ternary lithium battery is that it has a low ignition point when subjected to impact and high temperature. Therefore, the protection requirements of the ternary lithium battery are very high, in case of accidents, please use it with care. Disadvantages of ternary polymer lithium battery: 1. Low output efficiency: Tesla uses a NCR18650A battery with a typical capacity of 3070mAH. The continuous discharge current can only reach 2C, and the discharge effect at 2C is the best. 2. The capacity decays quickly and the lifespan is short. The battery used in Tesla cars will cycle from 0%-100% each time under the same charge and discharge current. After 900 times, the capacity has decayed to 55%. At 50%, even 3000 cycles of the star can still maintain 70% of the star. 3. Poor safety: the internal short circuit of the ternary material polymer lithium battery or the open flame will appear after the positive electrode material meets water. Even if the 18650 battery is protected by a steel shell, it still cannot withstand extreme shocks. In addition, the temperature of the ternary lithium battery increases sharply after high-power charging and discharging, and the oxygen released after high temperature is very easy to burn, so use it with care. Disclaimer: Some pictures and content of articles published on this site are from the Internet. If there is any infringement, please contact to delete.