Lithium-ion batteries, like all batteries, degrade over time and with use. This is due to irreversible chemical and physical deterioration of the battery’s internal structures during every charge and discharge cycle. This degradation can have a number of negative effects, such as reduced capacity, increased internal resistance, and reduced ability to deliver high currents, which may vary depending on factors such as the temperature at which it is used, the depth of discharge, and the rate at which it is charged and discharged. Therefore a aging test is an indispensable procedure in the production process of LiFePO4 batteries which can understand how a particular battery will behave as it ages so that its performance can be properly predicted and managed.

The battery aging test is a test that simulates the actual use of the battery, performs charge and discharge cycles on the battery, and records the performance of the battery. For example, an aging test can be used to determine a battery’s impedance, which is a measure of the resistance it presents to the flow of electric current. Increased internal resistance will cause the battery's discharge efficiency to decrease, affecting the battery's available energy, power output, and overall performance. Therefore a battery with high impedance will have a lower ability to deliver high currents, which can be a problem in applications such as power tools and electric vehicles.

The Importance of Aging Test of LiFePO4 Battery Pack

Firstly, make the infiltration of the electrolyte better, which is conducive to the stability of the performance of LiFePO4 battery pack;

Secondly, after aging test, the active substances in the positive and negative materials can promote the acceleration of some side effects, such as gas production and electrolyte decomposition, so that the electrochemical performance of battery pack can be quickly stabilized;

The third is to conduct screening the consistency of LiFePO4 battery pack after aging for a period of time. After formation, the voltage of the cell is unstable, and its measured value will deviate from the actual value. After aging, the cell voltage and internal resistance are more stable, which is convenient to screen batteries with high consistency.

From a enterprise perspective, product quality is an important factor that affects the company’s survival, and aging test is an important step in detecting battery quality. Only through battery aging test can the quality of the battery be guaranteed and customers can use high-quality products, high safety battery.

From the perspective of the product itself, the aging test can allow the electrolyte in the lithium battery to infiltrate better and the battery to react more completely; The aging test can also expose some defective products in lithium batteries, making it easier to screen out lithium batteries with high consistency in the later stage, ensuring product quality.

Consumers need to have confidence that new batteries will perform satisfactorily over their expected lifetimes. Nobody wants to purchase a battery that is packaged as new but turns out to be at the end of its life. This is a common occurrence with cheaper quality Lithium ion batteries. Hence battery aging tests are important as they provide the necessary quality assurance on life expectancy.

Overall, the aging test is an important tool for understanding the behavior of LiFePO4 batteries over time. In the battery aging test, the general test indicators involve the internal resistance, voltage and capacity of the battery, which are of great significance for the evaluation of the battery. The aging test can help manufacturers and users optimize battery performance and prolong the life of their batteries.

As a professional lithium iron phosphate battery manufacturer, Bely Energy has invested a lot of time and cost in aging test and established a professional aging workshop and implemented digital management to continuously improve product quality which will bring you peace of mind for years to come.