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The winding process of lithium-ion batteries is to roll the positive electrode sheet, negative electrode sheet and separator together through the winding needle mechanism of the winding machine. The adjacent positive and negative electrode sheets are isolated by the separator to prevent short circuit. After winding, the jelly roll is fixed with a termination tape to prevent it from spreading, and ...
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The dew point is the temperature at which moisture condenses. When the water vapor content in the air remains unchanged and the air pressure is kept constant, the temperature at which the air is cooled to saturation is called the dew point temperature (Td), or dew point for short. It can also be understood as the temperature at which water vapor and water reach equilibrium. The difference between ...
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Improving the initial coulombic efficiency of lithium-ion batteries is a complex and important topic, which is directly related to the energy utilization and overall performance of the battery. The following is an in-depth analysis of the factors affecting the first coulombic efficiency of lithium-ion batteries from multiple perspectives, and proposes corresponding solutions. 1.Factors affecting t...
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As a key equipment in battery production, the calibration accuracy of the coating head of the lithium battery coating machine directly affects the coating quality, and thus affects the performance and life of the battery. This article will analyze the calibration method of the lithium battery coating machine die head in detail from three levels: basic calibration, positioning calibration, and fine...
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Recently, Professor Zhang Qiang's team from the Department of Chemical Engineering at Tsinghua University published the research results on the bulk/surface interface structure design of lithium-rich manganese-based cathode materials for all-solid-state metal lithium batteries. They proposed an in-situ bulk/surface interface structure regulation strategy, constructed a fast and stable Li+/e−pathwa...
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WANG Kunpeng ,1, LIU Zhaolin2, LIN Cunsheng2, WANG Zhiyu ,1,2 1. State Key Lab of Fine Chemicals, School of Chemical Engineering, Dalian University of Technology, Dalian 116024, China 2. Branch of New Material Development, Valiant Co., Ltd., Yantai 265503, China Abstract In comparison to Li-ion batteries, Na-ion batteries offer the benefits of low cost, good low-temperature performance, and safety...
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