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How long do lithium ion batteries last?

(Summary description)

How long do lithium ion batteries last?

(Summary description)

  • Categories:Industry information
  • Author:Pamela
  • Origin:Battery university
  • Time of issue:2019-12-23 12:30
  • Views:11
Information

The typical estimated life of a Lithium-Ion battery is about two to three years or 300 to 500 charge cycles, whichever occurs first. One charge cycle is a period of use from fully charged, to fully discharged, and fully recharged again.

The battery is not durable and the capacity is not as much as before. These are the embodiment of the continuous decline of cycle life. Indicators related to long-term stable and reliable use of lithium-ion batteries: cycle life and safety.

The attenuation of cycle life, in fact, is the current actual available capacity of the battery, which is a decreasing trend compared with the rated capacity when it leaves the factory.

For an ideal lithium-ion battery, the capacity balance will not change in the cycle, and the initial capacity in each cycle should be a certain value, but the actual situation is much more complex. Any side reaction that can produce or consume lithium ion may lead to the change of battery capacity balance. Once the battery capacity balance state changes, this change is irreversible, and can be accumulated through multiple cycles, which has a serious impact on battery cycle performance.

There are many factors that affect the cycle life of lithium-ion batteries, but the underlying reason is that the number of lithium ions involved in energy transfer is decreasing. It should be noted that the total amount of lithium element in the battery is not reduced, but the "activated" lithium ion is less, they are confined in other places or the active channels are blocked, and they can not participate in the process of cyclic charging and discharging freely.

 

 

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