Ternary Lithium Battery Lifespan

A ternary lithium battery, commonly used in electric vehicles like the Tesla Model 3 and Nissan Leaf, typically lasts between 8 to 15 years or 100,000 to 200,000 miles, depending on usage and maintenance. The lifespan is influenced by factors such as charging habits, temperature exposure, and depth of discharge.

1. Charging habits: Frequent fast charging (e.g., using rapid DC chargers) can degrade the battery faster. Opt for slower, Level 2 charging where possible.
2. Temperature: Extreme cold or heat reduces efficiency. Parking in a garage helps mitigate temperature swings.
3. Depth of discharge: Regularly draining the battery below 20% or charging above 80% accelerates wear. Many EVs have built-in buffers to protect against this.

Manufacturers often provide warranties covering 70-80% of original capacity for 8 years, reflecting confidence in long-term durability. Real-world data from models like the BMW iX suggest gradual degradation, with most owners retaining over 90% capacity after 5 years.

The lifespan reaches about 10 years. The battery's service life is influenced by factors such as the driver's usage habits and regular maintenance, and is subject to actual usage conditions.

The theoretical lifespan of a ternary lithium battery is 1200 full charge-discharge cycles, also known as the full cycle lifespan. Based on usage frequency, one full charge-discharge every three days amounts to 120 full cycles per year. Ternary lithium batteries are also known as ternary polymer lithium batteries, referring to lithium batteries that use lithium nickel cobalt manganese oxide or lithium nickel cobalt aluminum oxide as cathode materials.

Due to their smaller size, higher energy density, and better low-temperature resistance, ternary lithium batteries are now widely used in new energy vehicles, such as the well-known Tesla, which employs ternary lithium batteries in all its models.

The lifespan of a ternary lithium battery is calculated based on the degree of capacity degradation after a certain period of use, until the capacity lifespan reaches zero. The industry standard algorithm generally considers one full discharge after a full charge as one cycle lifespan. During use, irreversible chemical reactions inside the lithium battery can cause a decline in capacity, such as improper usage or operation under extremely high or low temperatures.