After using electric vehicles for some time, they often encounter the problem of battery mileage decay. So, what are the reasons for the decline of lithium-ion battery packs in new energy vehicles?
New energy vehicles travel on the road and undergo countless cycles of charging and discharging. So there are many reasons that can affect battery degradation, including charging and discharging voltage, sufficient power of the battery, and external temperature, which can all have an impact on the battery.
As the power source device of new energy vehicles, the lithium-ion battery pack is related to the range of the vehicle. However, in actual use, various factors may affect the decline of lithium-ion batteries. This is similar to our electronic products. After using them for a long time, we will find that new farmers are not as good as before, and the battery level is not as good as before. When it comes to the reasons for the decline of lithium-ion battery packs, we still need to start from the working condition of lithium-ion batteries.
When the lithium-ion battery pack is repeatedly charged and discharged, the motor inside the battery will cause crystals to appear on the electrode of the battery body material, causing a decrease in the internal conductivity of the battery, that is, a decrease in the activity of lithium ions, which will lead to an increase in its resistance value and ultimately affect the decay of battery capacity.
The importance of lithium-ion batteries is to convert chemical energy into electrical energy through internal electrode oxidation reactions. The internal structure of lithium-ion batteries is composed of the positive and negative electrode materials and electrolyte of the battery. When the battery is repeatedly charged and discharged, the motor inside the battery will cause crystals to appear on the electrode of the battery's own material, causing a decrease in the internal conductivity of the battery. This will lead to a decrease in the activity of lithium-ion ions, resulting in an increase in its resistance value and ultimately affecting the decline of battery capacity. In fact, from the actual environment, it will affect the decline of lithium-ion battery packs for new energy vehicles, including the voltage of charging and discharging, and even the power of charging and discharging, as well as the temperature of the environment.
At present, ternary lithium-ion battery packs are important for the use of new energy vehicle batteries. The biggest concern about ternary lithium-ion batteries is that they are afraid of high temperatures in the environment, which can affect their service life. Different charging and discharging rates are used for different driving conditions. The larger the charging and discharging rate, the faster the battery capacity decay, which is actually due to changes in the structure and properties of the materials.
At present, lithium iron phosphate batteries and ternary lithium-ion battery packs are important in the use of new energy vehicle batteries. Various factors that affect the lifespan of power lithium-ion battery packs also interact with each other. The decline of lithium-ion battery packs in new energy vehicle models cannot be prevented at present.