Introduce the reasons for the decline of lithium-ion batteries

Lithium-ion batteries mainly convert chemical energy into electrical energy through the oxidation reaction of internal electrodes. The internal structure of lithium-ion batteries is composed of the positive and negative materials of the battery and the electrolyte. When the battery is repeatedly charged and discharged, the internal structure of the battery The motor will cause crystals in the battery body material electrodes, which will cause the internal conductivity of the battery to decrease, that is, the activity of lithium ions will decrease, which will cause its resistance to increase, and finally affect the attenuation of the battery capacity. In fact, From the perspective of the actual environment, it will affect the deterioration of the battery. There are voltages for charging and discharging, and even the power of charging and discharging the battery and the temperature of the environment. At present, new energy vehicle batteries mainly use ternary lithium-ion batteries, so the biggest point about ternary lithium-ion batteries is that they are afraid of the high temperature of the environment, which will affect their service life. Of course, this is also It will affect the energy density. In terms of the power of the electric vehicle, the battery degradation is important because the vehicle uses different charging and discharging magnifications to meet different driving conditions during the use of the vehicle. The greater the charging and discharging magnification is, The faster the battery capacity decays, in fact, it is also important because the change in the structure and properties of the material makes the internal ion diffusion relatively difficult. Regarding the battery, if the internal resistance is inconsistent, it will be that the internal current and voltage distribution is uneven, which will cause a local single battery undervoltage. Taken together, it will affect the life of the power lithium battery pack. In fact, there are still many. Of course, various factors also affect each other. The current decline of lithium-ion power lithium batteries is also inevitable. With the continuous improvement of power lithium battery technology, the problem of battery capacity decline is solved. Related issues are very important to extend the service life of power lithium batteries. Of course, this is also crucial to the development of electric vehicles. Disclaimer: Some pictures and content of the articles published on this site are from the Internet. If there is any infringement, please contact to delete. Previous: Advantages and disadvantages of lithium manganate batteries and introduction of classification