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Lithium-ion Battery Anode Material Classification
Apr 26 , 2024
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Lithium-ion Battery Anode Material Classification As one of the key materials for lithium-ion batteries, negative electrode materials need to meet multiple conditions. The Li intercalation and deintercalation reaction has a low redox potential to satisfy the high output voltage of lithium-ion batteries. During the process of Li intercalation and deintercalation, the electrode potential changes lit...read more
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This article analyzes the causes of zero voltage. Focused on the phenomenon of zero voltage in the battery caused by electrode burrs. By identifying the cause of the short circuit, we aim to precisely resolve the problem and better understand the importance of controlling electrode burrs during production. Experiment 1. Battery preparation This experiment uses lithium nickel cobalt manganate mater...read more
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Lithium-Ion Battery Electrode Laser Cleaning ProcessMay 28 , 2024The principle of laser cleaning is to utilize the characteristics of laser beam with large energy density, controllable direction and strong convergence ability. The laser interacts with contaminants such as oil stains, rust spots, dust residue, coatings, oxide layers or film layers attached to the workpiece base, and is separated from the workpiece base in the form of instantaneous thermal expans...read more
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Lithium-ion Battery Winding Process GuideJun 20 , 2024The 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 ...read more
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Key Points of Lithium-ion Battery Areal Density DesignJun 24 , 2024Areal density（mg/cm2）：Areal density refers to the mass per unit area, which in this case is (the mass per unit area ofthe region ignoring the volume). Compacted density（g/cm3）：The compacted density indicates the mass contained in a unit volume, which has a lot to do with the properties of the material itself. Thickness：The total thickness of the material and the foil is generally expressed in micr...read more
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Why Monitor Dew Point in Lithium-ion Battery Workshop?Jul 08 , 2024The 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 ...read more
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Battery Charge and Discharge CurvesJul 19 , 2024During 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...read more
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Importance of Battery ConsistencyAug 12 , 2024The inconsistency of energy storage batteries mainly refers to the inconsistency of parameters such as battery capacity, internal resistance, and temperature. Our daily experience is that when two dry batteries are connected in positive and negative directions, the flashlight will light up, and we don’t consider consistency. However, once batteries are used on a large scale in energy storage syste...read more
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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...read more
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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...read more
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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...read more
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The stability and dispersibility of battery slurry have an important impact on the properties of electrodes and finished battery products. So how to characterize the stability and dispersibility of battery slurry? Characterization method of battery slurry stability 1. Solid content method The solid content test method is a low-cost and easy-to-test method. Its principle is to place the slurry in a...read more
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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...read more
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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...read more
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Lithium iron phosphate (LiFePO4) cathode electrode material oil-based slurry usually uses N-methylpyrrolidone (NMP), dimethyl sulfoxide and dimethylformamide as solvents, which have problems such as difficult solvent recovery, large amount of use and environmental pollution. LiFePO4 positive electrode material water-based slurry uses deionized water as solvent, which is environmentally friendly an...read more
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Why do Lithium-ion Batteries Use Aluminum Shells?Dec 24 , 2024When designing lithium-ion batteries, the choice of battery casing material is critical. It must not only protect the battery's internal electrochemical components and structure but also possess properties like heat resistance, corrosion resistance, vibration resistance, and crush resistance. Among numerous materials, aluminum shells have emerged as the preferred choice due to their unique advanta...read more
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Solid-State Battery Production ProcessJan 21 , 2025Solid-state batteries and liquid batteries have many similarities in manufacturing processes. For example, the manufacturing process of electrode sheet is based on slurry mixing, coating and calendering. After slitting, the tabs are welded and PACK (battery packs are processed into groups). However, there are also some differences. There are three core differences: 1) Composite cathode materials f...read more
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How to Design a Lithium-ion Pouch Cell Lab Line?Jan 21 , 2025Before designing a battery production line, we need to comprehensively consider multiple aspects including product, capacity, process, equipment, regulations, supply chain, cost, safety, environmental protection, quality control, plant layout, automation, data management, maintenance, human resources, project management and market, etc. We ensure that all factors that may affect the production lin...read more
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In the cutting process, issues such as rapid mold wear, long mold change times, poor flexibility, and low production efficiency often lead to unstable processes, resulting in inconsistent electrode cutting quality and reduced battery performance. Laser cutting, due to its advantages of no vibration deviation, high precision, good stability, and no need for mold replacement, has gradually become ma...read more
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Lithium-ion batteries (LIBs) are the powerhouse of modern electronics and electric vehicles (EVs), and their performance hinges on the cathode materials. Among these, ternary cathode materials such as NCM (Nickel-Cobalt-Manganese oxides) and NCA (Nickel-Cobalt-Aluminum oxides) dominate due to their balanced energy density and stability. However, varying the ratios of nickel (Ni), cobalt (Co), mang...read more
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