How is the service life of new energy vehicle lithium battery?

At present, there are two main power lithium batteries: lithium iron phosphate and ternary lithium. Lithium iron phosphate is longer than life and safety, while ternary lithium is longer than low temperature performance and battery capacity per unit.

As for battery life, lithium-ion batteries used in ordinary electronic products will last between five and 20 years, with an average of eight years. But at the current level of technology, lithium-ion batteries will only last about three to five years in electric vehicles.

The reason for the short battery life of electric vehicles is nothing more than the impact of the working environment and large-scale charge and discharge caused by. The number of cycles of ternary lithium is about 500 to 1000 times, and that of lithium iron phosphate is about 2000 times.

Taking the least 500 times as an example, the endurance of Chery EQ is 200km, and the comprehensive driving condition is 160km according to 80%. 500X160= 80000, that is to say, under normal circumstances, when Chery EQ actually runs about 80,000km, the battery capacity will decay to the initial 80%; That's about 320,000 kilometers if you do lithium iron phosphate 2,000 times, or 640,000 kilometers if you do 400 kilometers.

If the capacity of the battery in an electric vehicle drops below 80% of its initial capacity, the vehicle's driving range will be significantly reduced. When the capacity drops below 70%, the battery must be replaced.

For many pure electric vehicles today, the cost of the battery is about 40 percent of the total cost of the vehicle, meaning that replacing the battery is equivalent to replacing less than half the car.