Capacity and life of lithium ion batteries.

Capacity and life of lithium ion batteries.

Capacity and life of lithium ion batteries

The longer a lithium-ion battery is discharged, the more it wears out, said Tom Hartley, a professor of electrical engineering at the University of Iowa. The more you charge it, the more likely it will wear out. Lithium-ion batteries perform better during charging and therefore last longer.

First, high and low charge states harm the life of lithium-ion batteries, followed by the number of charges and discharge. Most appliances or batteries are charged at an 80% discharge rate. Experiments have shown that in some laptops, the voltage of the lithium-ion battery is often allowed to exceed the standard voltage of 0.1 volts, that is, rising from 4.1 volts to 4.2 volts, and the battery life is cut in half. Low or no power for a long time will make the internal resistance of the electron movement larger and larger, resulting in smaller and smaller battery capacity. NASA has set the Hubble Space Telescope's battery consumption at 10% of its total capacity to ensure it can perform 100,000 charges and discharges without updating.

Second, the temperature has a large effect on the life of Li-ion batteries (negligible in cell phones and other small electronic devices). Sub-freezing conditions can cause lithium-ion batteries to burn out when the electronics are turned on while overheating conditions reduce battery capacity. Therefore, if the external power supply is used for a long time without removing the battery, the battery will be exposed to the high heat released by the notebook computer for a long time. What's more, the battery will be at 100% charge for a long period, and it will die soon.

In summary, we can summarize the following points to ensure the capacity and life of lithium-ion batteries:

Low-temperature lithium iron phosphate battery 3.2V 20A
Low-temperature lithium iron phosphate battery 3.2V 20A
-20℃ charge, -40℃ 3C discharge capacity≥70%
Charging temperature: -20~45℃
-Discharge temperature: -40~+55℃
-40℃ support maximum discharge rate: 3C
-40℃ 3C discharge capacity retention rate≥70%

Lithium-ion batteries.

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