Causes of Battery Capacity Fading
The reasons why the Battery Capacity fades
The fading of battery capacity is caused by a variety of factors, mainly including:
(1) Corrosion of positive electrode materials
The positive electrode materials of batteries are usually metal oxides such as lithium, nickel, and cobalt. These materials will gradually corrode when they react with the electrolyte, resulting in a decrease in battery capacity.
(2) Curing of the negative electrode material
The negative electrode material of the battery is usually carbon, lithium titanate and other materials, which will solidify after long-term use, reducing the capacity of the battery.
(3) Life decay
The chemical reactions inside the battery will gradually decrease over time, which will lead to a reduction in battery capacity.
Using the battery in a high temperature environment will reduce the capacity of the battery. Because high temperature will accelerate the speed of the chemical reaction inside the battery, and will also increase the volatilization rate of the electrolyte, thereby reducing the capacity of the battery.
(5) Charge and discharge times
The charge and discharge times of the battery will also affect the attenuation of the battery capacity. Because each charge and discharge will change the chemical reaction inside the battery, resulting in a decrease in battery capacity.
(6) Overcharge or overdischarge
The battery will be damaged when it is overcharged or overdischarged, resulting in a reduction in battery capacity.
(7) Battery usage environment
The usage environment of the battery will also affect the attenuation of the battery capacity. For example, if the battery is used in a harsh environment such as humidity or vibration for a long time, the battery capacity will also be reduced.
In general, the attenuation of battery capacity is the result of a variety of factors, and the attenuation factors of each battery type may be different. Therefore, care and maintenance should be paid attention to when using batteries to avoid unnecessary damage and prolong the service life of batteries.