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5. Coating film density

The error during coating with too thin film density may be more difficult to control, and large particles in the active material may also have a negative impact on coating and rolling. More layers mean more foil and membranes, which in turn means higher costs and lower energy density. Therefore, when evaluating, it is also necessary to consider balance.

6. Material type

The selection of materials is the first factor that affects the performance of lithium-ion batteries. Choosing materials with poor cycling performance, no matter how reasonable the process is and how perfect the manufacturing is, the cycling of the battery cells cannot be guaranteed; If a better material is selected, even if there are some issues with the subsequent production, the cycling performance may not be too poor. When designing the battery cell, if one pole is confirmed to use materials with poor cycling performance, the other pole does not need to choose materials with good cycling performance, which is wasteful.

7. Electrolyte volume

There are three important reasons why insufficient electrolyte volume has an impact on circulation. Firstly, insufficient injection volume. Secondly, although the injection volume is sufficient, the aging time is insufficient or the immersion of the positive and negative electrodes is insufficient due to high compaction. Thirdly, as the electrolyte inside the circulating cell is consumed, it is not sufficient.

Factors affecting the lifespan of lithium-ion batteries

The charging and discharging cycle of lithium-ion batteries is a complex physical and chemical reaction process, and the factors affecting its cycle life are multifaceted. On the one hand, it is related to the characteristics of lithium-ion batteries themselves, such as design, manufacturing process, and material performance degradation; On the other hand, it is related to the external influences on the battery during use, such as the usage environment and charging and discharging system.

● The impact of design and manufacturing processes

The selection of materials is the most important factor in the design process of lithium-ion batteries. The performance characteristics of different materials vary, and there are also differences in the performance of batteries developed. The cycling performance of the battery is only prolonged when the positive and negative electrode materials match well. In terms of ingredients, attention should be paid to the amount of positive and negative materials added.

● The impact of battery usage environment

The usage environment of lithium-ion batteries also has a significant impact on their cycle life. Among them, environmental temperature is a very important factor. Low or high ambient temperature can affect the cycling life of lithium-ion batteries.

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