Lithium precipitation, thickening of the electrode surface passivation film, loss of reversible lithium, and degradation of the active material structure can all lead to a decline in the lifespan of lithium-ion batteries. Among them, the negative electrode is the primary factor causing capacity decay in the battery. This article summarizes the main principles of negative…

Lithium-ion batteries are typically combined in series or parallel to form a power battery pack in order to meet the performance requirements. As the number of individual batteries increases, the issue of battery consistency becomes more prominent. Inconsistency in batteries can lead to a range of problems such as reduced battery lifespan, decreased performance, and…

One of the key processes in the commercialization of secondary lithium-ion batteries is the use of liquid electrolytes, making the injection process essential. The injection process refers to the procedure of injecting electrolyte into the interior of the battery cell and sealing it using injection equipment. 01.Overview of Injection Equipment1.1 Importance of Injection Equipment In…

The pouch pack battery assembly line is a crucial part of the mid-to-late stage processes in lithium battery manufacturing. It is primarily responsible for handling the assembled or wound bare cells and performing operations such as tab welding, taping, cell casing, and top-side sealing. The design principle of the assembly line is based on the…

Water content has a significant impact on battery performance and must be strictly controlled during the manufacturing process. The presence of water in batteries can cause degradation of the electrolyte, or react with the electrolyte to produce harmful gases, leading to increased pressure and deformation within the battery. Excessive water content in batteries can also…

01 Functions, principles and influencing factors of rolling quality of calendering machine Functions of calendering machine Calendering is a process in which the coated and partially dried lithium battery electrode sheets are compacted. Calendering of electrode sheets increases the energy density of lithium batteries and ensures that the electrode materials are firmly attached to the current collector, preventing…

prismatic batteries refer to batteries with aluminum casings. They use laser sealing technology, and the fully sealed aluminum casing technology is already highly mature. It has low requirements for material technology indicators such as gas generation and expansion, making it an early popularized form of power battery in China. Compared to the other two forms of…

Coating technology is a process based on the study of fluid properties, which involves applying one or multiple layers of liquid onto a substrate. The substrate is typically a flexible film or paper. The liquid coating is then dried or cured using methods such as oven drying to form a layer with special functionality, such…

Winding refers to a production process where electrode sheets, separators, and termination tapes with matching dimensions, which have been slit into strips, are rolled into jelly roll by controlling factors such as speed, tension, size, and deviation of the electrode sheets. 01. Overview of Winding Equipment Classification Classification of Mainstream Winding Machines Lithium battery winding machines are used to…

from LIDIANBIJI 01 Introduction to pulping process 1.1 The Importance of the Pulp-making Process The performance limit of lithium-ion batteries is determined by the chemical system used, including the active materials for the cathode and anode, as well as the electrolyte. However, the actual performance depends crucially on the microstructure of the electrode, which is…