What is the service life of lithium-ion batteries in new energy vehicles

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

For battery life, the service life of lithium ion batteries on ordinary electronic products is about 5 to 20 years, and the average can reach 8 years. However, at the current level of technology, lithium-ion batteries have a service life of only about 3-5 years in electric vehicles.

The reason why the battery life of electric vehicle is short is nothing more than the effect of working environment and large-scale charge and discharge. The number of cycles of ternary lithium is about 500 to 1,000 times, and lithium iron phosphate is about 2,000 times;

Taking the minimum 500 times as an example, Chery EQ has a life span of 200 kilometers. The comprehensive operating condition is 160 kilometers and 500 X160 = 80,000. Under normal circumstances, Chery EQ actually travels about 80,000 kilometers. The battery capacity will decay to the initial 80 %; If calculated according to 2,000 times of lithium iron phosphate, it is about 320,000 kilometers, and if it lasts 400 kilometers, it is 640,000 kilometers.

If the battery capacity on an electric car decays below 80 % of its initial capacity, the range of electric car life will be significantly reduced. When the battery capacity decays below 70 %, the battery must be replaced.

For many of today's pure electric vehicles, the cost of batteries accounts for about 40 % of the total cost of the car. In other words, replacing batteries is equivalent to replacing a small half of the car.

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