How Often Should New Energy Vehicle Batteries Be Replaced?

[DeJeremiah]

There is no mandatory regulation on the service life of new energy vehicle batteries, as it depends on the consumer's usage conditions: The charge-discharge cycle life is an important parameter for measuring the performance of secondary batteries. One complete charge and discharge is called one cycle (or one period). Under a certain charge-discharge system, the number of charge-discharge cycles a battery can endure before its capacity drops to a specified value is called the charge-discharge cycle life of the secondary battery. The longer the charge-discharge cycle life, the better the battery's performance. Among the commonly used secondary batteries today, nickel-cadmium batteries have a charge-discharge cycle life of 500-800 cycles, lead-acid batteries 200-500 cycles, lithium-ion batteries 600-1000 cycles, and zinc-silver batteries the shortest, around 100 cycles. Wet shelf life is another important parameter for measuring the performance of secondary batteries: It refers to the time from when the battery is filled with electrolyte to the end of its charge-discharge cycle life (including the time the battery is in a discharged state during the charge-discharge cycle). The longer the wet shelf life, the better the battery's performance. Among the commonly used batteries today, nickel-cadmium batteries have a wet shelf life of 2-3 years, lead-acid batteries 3-5 years, lithium-ion batteries 5-8 years, and zinc-silver batteries the shortest, only about 1 year.

[OBrody]

I've been driving a new energy vehicle for five years now, always using the original battery. Based on the manual and my actual experience, generally after 8 to 10 years you may need to inspect or replace it, depending on your usage habits and maintenance. If you frequently deep discharge, use fast charging, or park in extremely high temperatures, the battery lifespan will shorten faster. Remember to regularly visit the 4S shop for a battery health check, and it's best to keep the charge between 20% and 80% to extend its service life. Among my friends, some have driven for 10 years without replacing it, but once the range drops below 70%, it may affect daily use. The replacement cost is significant, possibly tens of thousands, but if you don't plan to change cars, budget accordingly. Battery technology is advancing quickly now, so prices might drop in a few years. Driving smoothly makes battery management easier.