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Misunderstandings about lithium battery discharge

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Time of issue:2022-03-30 11:28
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(Summary description)"The more a lithium battery is discharged, the more wear and tear the battery will wear," said Tom Hartley, a professor of electrical engineering at Akron University who helps NASA research extending battery life.

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Misunderstandings about lithium battery discharge

Categories:lithium ion battery News
Author:
Origin:
Time of issue:2022-03-30 11:28
Views:

Information

"The more a lithium battery is discharged, the more wear and tear the battery will wear," said Tom Hartley, a professor of electrical engineering at Akron University who helps NASA research extending battery life. "The more you charge the battery. , the loss of the battery will be greater. The lithium battery should be in the middle state of power, so the battery life will be long.”

First of all, too high and too low state of charge have an adverse effect on the life of lithium batteries, and the number of charge and discharge cycles is secondary. In fact, most of the rechargeable times marked on the electrical appliances or batteries sold are based on the benchmark test of 80% discharge. Experiments have shown that for some lithium batteries of notebook computers, the battery voltage is often increased by 0.1 volts beyond the standard voltage, that is, from 4.1 volts to 4.2 volts, then the battery life will be halved, and then increase by 0.1 volts, the life will be reduced to the original 3 The long-term low-power or no-power state will increase the resistance to electron movement inside the battery, resulting in a smaller battery capacity. NASA has set the consumption of the batteries on its Hubble Space Telescope at 10 percent of total capacity to ensure that the batteries can be recharged and discharged 100,000 times without having to be renewed.
Secondly, temperature also has a greater impact on the life of lithium batteries (mobile phones and other small electronic devices can be ignored in this regard). An environment below freezing point may cause the lithium battery to burn out the moment the electronic product is turned on, while an overheated environment will reduce the capacity of the battery. Therefore, if the laptop uses an external power supply for a long time without removing the battery, the battery will be exposed to the high heat discharged from the laptop for a long time.