How is the battery degradation of new energy vehicles?

[DelElliot]

The battery degradation of new energy vehicles is caused by lithium battery abuse, temperature factors, etc. The specific details are as follows: Lithium battery abuse: When the SOC of a lithium battery is below 120%, there is no significant capacity loss. At excessively high SOC levels, the decomposition rate of the electrolyte accelerates, forming a thick deposition layer on the graphite anode, which contains lithium that is prone to precipitation. Temperature factors: Temperature is one of the key factors affecting the lifespan of lithium batteries. Excessively high or low temperatures can reduce the content of active lithium ions, damage the structure of electrode materials, and cause the dissolution of metal ions, leading to severe battery capacity degradation.

[DerekDella]

As someone who has long followed new energy technologies, battery degradation is a natural aging process for lithium-ion batteries, where capacity gradually declines with increasing charge-discharge cycles. Typically, the annual degradation rate is around 2-3%, and after 5-8 years of use, the range may decrease to about 80% of the original capacity. Contributing factors include high-temperature environments accelerating chemical decomposition, frequent fast charging increasing internal pressure, and deep discharges damaging the battery structure. It is recommended to maintain daily charging between 20-80%, avoid parking in extreme temperatures, and check the warranty terms when choosing a vehicle, as most automakers offer an 8-year or 160,000-kilometer warranty, with free replacement if degradation exceeds 30%. Regularly using diagnostic tools to check battery health and adjusting habits promptly can effectively delay issues.

[MacBriella]

I've been driving a pure electric vehicle for 4 years, and the battery degradation is quite noticeable. When new, it could run 450 km on a full charge, but now it only reaches around 380 km. The range drops even faster in winter, especially when using the heater. Discussing with fellow EV owners, it's common to see a 10-20% range reduction after 3-5 years of use, which falls within normal range. Charging habits significantly impact degradation - my frequent use of fast charging likely accelerated it, but switching to primarily slow charging later helped. Temperature management is crucial; I park in shaded areas during summer to prevent battery overheating. The dealership checked during warranty period and confirmed degradation was within standards, so no battery replacement needed. While slightly disappointed psychologically, it still meets my daily commuting needs. I'm considering resale value when planning my next car purchase.

[ReeseDella]

With over a decade of experience in auto repair, common causes of new energy battery degradation include excessive charge-discharge cycles, large temperature fluctuations, or internal battery pack imbalance. It's recommended that owners avoid letting the battery level drop below 10%, use slow charging more often than fast charging, park in garages to avoid extreme heat or cold, and schedule regular battery inspections at 4S shops to detect issues early. If degradation exceeds warranty standards, free replacement is available; otherwise, battery replacement can be costly, typically costing tens of thousands. Proper maintenance can extend battery life by over 5 years, saving significant expenses. Don't overlook small habits, such as avoiding frequent full charges or complete discharges—maintaining a moderate battery state is most durable.