The core purpose of lithium battery aging tests is to eliminate defects, stabilize performance, and ensure safety and reliability. The specific reasons are as follows:
01.Expose latent production defects
The lithium battery production process is complex and may harbor hidden issues such as electrode burrs, micro-short circuits, insufficient electrolyte, or leakage during encapsulation. These problems are difficult to detect initially. Aging tests (simulating charge-discharge cycles) can rapidly reveal defects—for instance, batteries with micro-short circuits will overheat and experience a sharp capacity drop during cycling. This allows for early rejection, preventing substandard products from entering the market.
02.Stabilize core battery performance
The interface between the electrodes and electrolyte in new batteries forms an unstable SEI film (solid electrolyte interphase). The charge-discharge cycles during aging tests promote the formation of a uniform, dense, and stable SEI structure. This reduces unexpected capacity degradation during subsequent use, stabilizing parameters such as battery capacity and voltage within acceptable ranges to ensure product consistency.
03.Verification of Service Life and Reliability
By simulating real-world usage scenarios (varying temperatures and charge/discharge rates) through aging cycles, we can monitor the rate of battery capacity degradation and internal resistance increase, thereby estimating its cycle life and storage life. This provides performance benchmarks for end applications (such as smartphones and new energy vehicles), ensuring the battery meets usage requirements throughout its design lifespan.
04.Mitigate endpoint security risks
Batteries with safety hazards (such as internal impurities or structural defects) may exhibit issues like abnormal temperature, gas buildup, or voltage fluctuations during aging tests. Early identification of these risks can prevent safety incidents like thermal runaway or fires during battery use, ensuring user safety.
Post time: Nov-11-2025