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Battery Manufacturing Terminology
The range of variation in the difference between the envelope lines on the same side of the positive and negative electrode sheets within the core pack is referred to as "EU" (Envelope Uniformity).
The alignment degree between the separator and the positive or negative electrode within the core pack is referred to as "FU" (Alignment Uniformity).
The relative position difference within the core pack between electrode sheets and electrode sheets, as well as between electrode sheets and the separator, where they overlap.
The relative position error in the overlap of material rolls (positive electrode sheets, negative electrode sheets, separators, tapes).
The relative position error in the overlap of multiple tab or tab-like features within the core pack.
The part of the negative electrode sheet that extends beyond the positive electrode sheet in either the length or width direction.
A characteristic of slurry material flow that reflects the strength of interactions between liquid molecules during motion. Strong interactions (high viscosity) result in less flow.Note: The viscosity typically referred to is shear viscosity.
Sharp metal impurities present at the edges of electrode sheets can potentially puncture the separator, leading to a short circuit inside the battery.
The size of particles in a slurry is referred to as particle size or particle granularity.
The solid content of a slurry is essentially the non-volatile content of the slurry. The testing procedure involves heating at a specific temperature to determine the time, and then measuring the remaining substance's weight in relation to the initial substance's weight. There are two testing methods: infrared and oven-drying.
After the electrode has undergone the coating process, the weight of the electrode material applied per unit area is referred to as areal mass loading.
After the electrode has undergone the calendaring process, the weight of the electrode material applied per unit volume is referred to as volumetric mass loading.
The uniformity tolerance of the thickness of the coated material on a web after drying is categorized based on the coating process into single-side dry thickness tolerance and double-side dry thickness tolerance, depending on whether it is a single-sided or double-sided coating.
When the raw materials are qualified, the percentage of output products that meet the requirements after testing, in relation to the theoretical total number of products that can be produced from the input materials.
The percentage of the number of produced cells in relation to the number of input cells.
The percentage of the number of qualified tested cells in relation to the total number of produced cells.Note: Qualified tested cell count refers to cells that, after formation, meet the battery parameter requirements for capacity, voltage, internal resistance, and self-discharge.
