Lithium-ion power battery as a new energy vehicle power source device, the relationship between the vehicle's range of high and low, but in the actual use of the process, will be due to a variety of factors, resulting in the decline of the battery, this is like our electronic products, the use of a long time will find that the new farmers are not as good as before, and the power is not as good as before, talking about the reasons for the decline of lithium batteries, or first need to look at the working conditions of lithium batteries.
Lithium battery is mainly through the internal electrode oxidation reaction, the conversion of chemical energy into electricity, lithium battery internal structure by the battery's positive and negative electrode materials and electrolyte, when the battery is repeatedly charged and discharged, the battery's internal battery will cause the battery body material electrode will produce crystals, causing the battery's internal conductivity to decline, that is, the lithium ion activity has declined, then it will lead to its In fact, from the actual environment, affect the battery decline, including the charge and discharge voltage, and even the battery charge and discharge power and the temperature of the environment.
At present, the main use of new energy vehicle battery is ternary lithium battery, then the biggest point for ternary lithium battery to foot is afraid of the environment of high temperature, which will affect its life, of course, this will also affect the energy density, being the power of electric vehicles to do work above, the battery decline is mainly due to the use of the vehicle in the process, in order to meet the different driving conditions and the use of different charge and discharge rate, the greater the charge and discharge rate, the faster the battery capacity decay, in fact, is mainly due to changes in the structure and nature of the material, making its internal ion diffusion becomes relatively difficult.
For the battery, the internal resistance is inconsistent, it will be his internal current voltage distribution is not uniform, which will lead to a localized single battery undervoltage situation, a comprehensive view, the factors affecting the life of the power battery pack, in fact, is still very much, of course, various factors are also affecting each other, the current decline of lithium-ion power batteries is also inevitable, with the power battery With the continuous improvement of power battery technology, it is very important to solve the problems related to battery capacity decline to extend the service life of power batteries. Of course, this is also crucial for the development of electric vehicles.
