In the current fields of electric transportation, consumer electronics and energy storage, Li-ion battery PACK, as the core energy storage unit, the stability and reliability of its performance is crucial to the overall performance of the product. In order to ensure that the lithium battery PACK can work stably and efficiently in practical applications, charging and discharging aging test has become an essential part. In this article, XinDaNeng small editor will explore in detail from a variety of perspectives why the lithium battery PACK charging and discharging aging test, as well as the specific role of this test.

I. Reasons for charging and discharging aging test

1、Improve product stability and reliability

Lithium battery PACK in the production process, due to various reasons (such as materials, processes, etc.) may lead to differences in parameters such as internal resistance, voltage, capacity, etc. of the battery cells. These differences, if not adequately tested and screened, may lead to problems in the actual use of the battery pack, such as excessive capacity degradation and short cycle life. Therefore, charging and discharging aging test can effectively simulate the working condition of the battery pack in actual use, and expose potential performance problems in advance, so as to repair or replace the product before shipment and improve the stability and reliability of the product.

2、Evaluate the service life of the battery pack

Through the charging and discharging aging test, it can simulate various severe conditions of the battery pack in real use, such as high temperature, low temperature, high current discharge and so on. Under these conditions, the performance degradation of the battery pack will be accelerated, thus helping us to understand the service life of the battery pack in different environments. This kind of test can provide important reference data for product design and help engineers better evaluate the performance and life of the product to meet customers' needs.

3、Guarantee the factory quality

In order to ensure that the battery pack meets the quality standards of customer satisfaction, almost all battery packs need to undergo aging test before leaving the factory. This step not only screens out defective products, but also improves the overall product quality. Through the aging test, we can ensure that the battery packs have stable performance and reliable quality when they leave the factory, so as to improve customer satisfaction and trust.

Third, the role of charge and discharge aging test

1、Expose potential problems

Charge and discharge aging test can simulate the working condition of the battery pack in actual use, thus exposing potential performance problems. These problems may include capacity degradation of the battery cells, increased internal resistance, voltage fluctuations, etc. Through the test, we can find these problems in time. Through the test, we can find these problems in time and repair or replace them to avoid problems in the actual use of the product.

2、Prediction of product life

By simulating various harsh conditions in real use, the charge/discharge aging test can help us predict the service life of the product. This type of test can provide data on the performance degradation of battery packs in different environments, thus helping engineers to better evaluate the performance and life of products. These data are important references for product design, production and quality control.

3、Improve the qualification rate

Charge/discharge aging test is a key step to ensure that the battery pack reaches a satisfactory pass rate. Through the test, we can screen out defective products and repair or replace them, thus improving the overall product qualification rate. This not only reduces production costs and after-sales maintenance costs, but also improves customer satisfaction and trust.

Conclusion

To summarize, the reasons and roles of charging and discharging aging test for lithium battery PACK are manifold. Through this test, we can improve the stability and reliability of the product, assess the service life of the battery pack, ensure the factory quality, and expose potential problems, predict the product life and improve the qualification rate. Therefore, charge/discharge aging test is an essential part in the production process of lithium battery PACK.