What is the number of life cycle times for 18650 lithium-ion batteries?

What is the number of life cycle times for 18650 lithium-ion batteries?

Based on the quality of rechargeable batteries and lithium battery materials, clarify the number of life cycles of lithium-ion batteries:

1、 The ternary lithium-ion battery can be cycled approximately 800 times.
2、 The cycle frequency of lithium iron phosphate batteries is about 2500 times.
3、 The frequency of the cycle system for rechargeable batteries is different from that of fake and inferior rechargeable batteries. Fake and inferior rechargeable batteries are designed and manufactured based on the cycle system frequency specified in the manufacturer's manual, while the cycle system frequency of fake and inferior rechargeable batteries may not easily occur within 50 cycles.

The basic theoretical service life of ternary lithium batteries is about 800 cycles per system, which is above average among commercial rechargeable lithium batteries. Lithium iron phosphate batteries have approximately 2000 cycles, while lithium titanate can complete a system of 10000 cycles. The popular manufacturers of lithium-ion batteries today promise a service commitment of over 500 cycles in their ternary battery specifications. However, due to consistency issues when assembling lithium-ion battery cells into lithium-ion battery packs, it is important to note that the operating voltage and internal resistance cannot be completely consistent. The service life of the cycling system is about 400 cycles.

In general, the cycle frequency of a ternary lithium battery is around 500 to 1000 times. Assuming that a new energy vehicle travels 300 kilometers in a detailed cycle system, it means that the cycle frequency of the rechargeable battery will be exhausted after 150000 to 300000 kilometers.

There are many factors that endanger the service life of the cycling system of lithium batteries, but the direct cause is the continuous decrease in the total number of lithium iron phosphate participating in kinetic energy transfer. It must be emphasized that the total production of lithium element in rechargeable batteries has not decreased, only the less and less active lithium iron phosphate has been added. They are restricted to safe channels in other places or themed activities and cannot participate in the entire process of battery charging in the cycling system at will. Therefore, by understanding the trend of lithium iron phosphate that should participate in redox reactions, we can understand the principle of volume reduction and take targeted and effective measures to slow down the development trend of lithium battery volume reduction and increase the service life of its cycling system.