What are the reasons for power battery failure in pure electric vehicles?
2 Answers
Reasons for power battery failure in pure electric vehicles: 1. Low SOC of individual battery cells and high SOC of individual battery cells. If the SOC of an individual battery cell is low, its voltage will be the first to reach the discharge cutoff voltage during vehicle operation, reducing the actual capacity of the battery pack. In this case, the individual battery cell should be charged; 2. Severe battery performance degradation, which requires immediate replacement. The power battery is the power source that provides energy for tools, mainly referring to the batteries that power electric vehicles, electric trains, electric bicycles, and golf carts. Power batteries often use valve-regulated sealed lead-acid batteries, open tubular lead-acid batteries, and lithium iron phosphate batteries.
I've been driving a pure electric vehicle for several years and have encountered battery failure issues. The main reasons include capacity degradation due to natural battery aging, which is similar to how a smartphone's battery life deteriorates over time. Frequent overcharging, especially using fast charging, can increase internal battery pressure and cause damage. Temperature management is also a significant issue. Parking in direct sunlight during hot summers can cause the battery to overheat and accelerate degradation, while in winter, performance drops and cold starts become difficult. Additionally, manufacturing quality issues or physical impacts that damage the protective layer can lead to short circuits. I believe regular maintenance, such as avoiding full charge-discharge cycles and periodically checking the cooling system, can significantly reduce the risk of failure. Electric vehicles are quite convenient, but the battery is the core component and requires careful attention.
