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1. The influencing factors that affect the internal resistance of lithium-ion batteries include: cell electrode and tabs, raw materials, manufacturing processes, applications, and many other aspects. This article mainly discusses the influence on the internal resistance of the lithium battery from the design of the cell electrode and tab.
2. In the cell structure design, in addition to the riveting and welding of the cell structure itself, the length of the cell electrode, the material, quantity, size, and location of the tabs directly affect the internal resistance of the cell. To a certain extent, increasing the number of tabs can effectively reduce the internal resistance of the battery. The position of the tab can also affect the internal resistance of the cell. The internal resistance of the winding battery with the tab position at the head of the cathode and anode electrode is the largest, and compared to the winding battery, the laminated battery is equivalent to dozens of small battery in parallel, and its internal resistance is smaller.
3. The 26650 battery cells designed and manufactured by Power Long Battery are optimized in terms of the material, quantity and location of the tabs. The battery cells have obvious advantages of low internal resistance and good consistency.