What is the impact of the intaglio process on the performance of lithium batteries?

　　Impact on yield:

　　1. Flatness and thickness uniformity of intaglio: If there are unevenness or significant differences in thickness on the surface of intaglio, problems such as breakage and wrinkling are prone to occur during the subsequent electrode manufacturing process, leading to a decrease in yield.

　　2. Adhesion between slurry and substrate: During the coating process, if the adhesion between slurry and substrate is insufficient, it is easy to peel off during drying or forming, which affects the yield of finished products.

　　The impact on battery performance:

　　1. Consistency of electrode thickness: The quality of the intaglio determines the consistency of electrode thickness, which in turn affects the internal resistance and charge discharge performance of the battery. A uniformly thick electrode sheet can reduce internal resistance, improve the rate performance and cycling stability of the battery.

　　2. Surface smoothness: The intaglio surface has high smoothness, which is conducive to reducing polarization phenomena during electrode reactions, improving the charging and discharging efficiency and energy conversion efficiency of the battery.

　　The impact on battery life:

　　1. Uniformity of material distribution: High quality intaglio can evenly distribute electrode materials in the coating, avoiding excessive concentration or sparsity of local materials, thereby reducing capacity degradation of the battery during cycling and extending battery life.

　　2. Residual stress: Improper processing during the intaglio printing process may lead to the generation of residual stress, which may cause damage to the electrode structure during battery use and affect battery life.

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