Regarding the lifespan of new energy vehicle batteries, theoretically, they can last up to ten years or even longer. However, foreign media reports indicate that the current lifespan of new energy vehicle batteries is generally only about five years. This means that new energy vehicle batteries can only be used for about five years. After five years, the batteries begin to gradually degrade, the driving range decreases with each use, and eventually, they have to be scrapped and replaced.
Based on battery lifespan, the typical lifespan is around 6-8 years. Generally speaking, the lifespan of a lithium battery is determined the moment it is manufactured. Taking ternary lithium batteries as an example, based on the battery cell materials, the cycle life is around 1500 to 2000 cycles. If we assume that a new energy vehicle can travel 500km in one complete cycle, then it means that the battery will reach the end of its cycle life after 300,000 to 500,000 kilometers.
Based on the time frame, with approximately 30,000 kilometers per year, it could last for nearly ten years. However, in reality, it may not last that long; the actual lifespan depends on usage habits and environment. Currently, the nominal lifespan of a battery is 80%. Since battery degradation is irreversible, the only solution is to replace the battery. Given the current level of lithium battery technology, if the vehicle is used properly, the lithium battery can last at least six years.
A friend asked, "My new energy vehicle's battery isn't even five years old, but the driving range has already decreased significantly. It used to be able to travel over 300 kilometers on a single charge, but now it only travels about 200 kilometers. Why is that?"
1. Frequent fast charging. Many new energy vehicles support fast charging, so many car owners choose to fast charge to quickly charge their vehicles and ensure normal operation. Fast charging is a good feature, but frequent use of fast charging can reduce the battery's recovery capacity, thereby reducing the number of charge-discharge cycles and causing some damage to the battery.
2. Prolonged storage in low temperatures. Currently, the batteries for new energy vehicles on the market are mainly divided into two types: ternary lithium batteries and lithium iron phosphate batteries. Although they perform differently when exposed to low temperatures, both types of batteries experience battery degradation when exposed to low temperatures.
3. Charge frequently when the battery is low. Since lithium-ion batteries do not have a memory effect, electric vehicles, like our smartphones, should be charged whenever needed, and you should try not to let the battery run completely out before charging.
4. Heavy acceleration. Because electric vehicles are known for their excellent acceleration, some drivers like to floor the accelerator for a powerful push. However, it's important to understand that high current discharge causes a sharp increase in battery internal resistance, and frequent driving in this manner can potentially damage the battery.
Therefore, the lifespan of an electric vehicle battery mainly depends on the usage environment and methods. Due to various factors in daily life, especially the fact that the depth of charge and discharge is not constant during battery use, the battery's lifespan can only be used as a reference. So, instead of worrying about the lifespan of the power battery pack, it's better to pay attention to your daily driving habits.
