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Four Factors Affecting The Life Of Lithium Batteries
Jul 18, 2018

What are the factors that really affect the life of lithium batteries? Xiaobian summarizes the following four points:

1 overheated or too cold environment

Temperature also has a large impact on the life of lithium batteries. The environment below the freezing point may cause the lithium battery to burn out at the moment when the electronic product is turned on, and the overheated environment will reduce the capacity of the battery. Therefore, if the notebook does not take off the battery after long-term use of the external power supply, the battery will be in the high heat of the notebook for a long time, and will soon be scrapped.

2 long time full power, no power state

Excessively high and too low state of charge adversely affects the life of the lithium battery. Most resellers that are sold on appliances or on batteries are re-charged based on 80% discharge. Experiments have shown that for some notebook lithium batteries, the battery voltage often exceeds the standard voltage of 0.1 volts, that is, from 4.1 volts to 4.2 volts, then the battery life will be halved, and then increased by 0.1 volts, the life is reduced to the original 1 /3; The more fully charged the battery, the greater the loss of the battery. A long-term low-power or no-power state will cause the internal resistance of the battery to move more and more, resulting in a smaller battery capacity. The lithium battery is preferably in the middle of the battery, so that the battery life is the longest.

3 discharge depth and number of chargeable

The left graph data obtained from the experiment can be known that the number of chargeable times is related to the depth of discharge, and the deeper the battery discharge depth, the less the number of chargeable times.

Charging times * Discharge depth = total number of completion cycles, the higher the total number of completion cycles, the higher the battery life, the number of times of charging * the depth of discharge = the actual battery life (ignoring other factors)

4 overcharge, over discharge, and large charge and discharge current

Avoid overcharging the battery. Any form of overcharging of the lithium-ion battery can cause serious damage to the battery performance and even explosion.

Avoid deep discharges below 2V or 2.5V as this will quickly and permanently damage the lithium-ion battery. Internal metal plating may occur, which can cause a short circuit and make the battery unusable or unsafe.

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