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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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During the charge and discharge process of the battery, as the charge and discharge depth changes, the voltage is also constantly changing. If we use capacity as the horizontal coordinate and voltage as the vertical coordinate, we can get a simple charge and discharge curve, which contains many clues about the battery's electrical performance. These curves drawn with the battery cell parameters su...
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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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The current production efficiency and yield of large cylindrical batteries are still relatively low, and there are still the following process difficulties in achieving high-efficiency mass production: 1) Full-tab forming: The difficulty lies in controlling the flattening accuracy and strength to avoid damage to the current collector or the generation of debris, dust, etc. 2) Collector plate and p...
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