电池级金属锂电解槽多物理场耦合优化科学数据集

金属锂是国家战略性金属，广泛应用于新能源、新材料、新医药等领域，被誉为“工业味精”与“新能源金属”。金属锂及锂材产品是高比能固态锂电池的关键负极材料，随着固态锂电池在新能源汽车领域的不断应用，金属锂的发展前景和需求空间将不断扩张。锂电解槽是工业制备金属锂的核心设备，电解槽中电场、磁场、流场、热场等物理场相互耦合，共同决定电解槽的能量平衡及电流效率。建立锂电解槽电解质-氯气气液两相流二维模型，使用标准k-ε两方程模型耦合欧拉-欧拉模型求解不同极间通道内电解质流速与气相体积分率分布。对槽内不同结构和操作参数分析发现，缩短极距能够降低气相分率，使侧面极间通道内电解质速度增加，中间极间通道内速度下降；增大阳极半径，气相分率与液相流速均下降；增加电解质液面高度对两者的影响不大，增加电流强度则会使两者增加。建立三维电-流场和三维电-磁-流场模型，分析电磁力对不同截面液相流速分布的影响。电磁力减弱电解质yz截面涡流的形成，同时降低电解质xy截面的最大速度，使电解质流动更加充分。建立锂电解槽三维电-热场模型，经过积分运算得到电解槽的产散热量，发现30kA电解槽能够实现能量平衡。在能量平衡的基础上得到电解槽不同结构参数所需的电流强度，并利用无因次法获得电流强度与结构参数的方程，利用该方程能够依据电流强度直接进行电解槽结构参数优化。Lithium metal is a national strategic metal widely used in new energy, new materials, new pharmaceuticals and other fields, and is known as the "industrial monosodium glutamate" and "new energy metal". Lithium metal and lithium-based products are key anode materials for high-specific-energy solid-state lithium batteries. With the continuous application of solid-state lithium batteries in the new energy vehicle sector, the development prospects and demand for lithium metal will continue to expand. Lithium electrolysis cell is the core equipment for industrial production of lithium metal. Various physical fields such as electric field, magnetic field, flow field and thermal field in the electrolysis cell are coupled with each other, which jointly determine the energy balance and current efficiency of the electrolysis cell. A 2D model of electrolyte-chlorine gas-liquid two-phase flow in a lithium electrolysis cell was established, and the standard k-ε two-equation model coupled with the Euler-Euler model was used to solve the distribution of electrolyte flow velocity and gas volume fraction in different inter-electrode channels. Through the analysis of different structural and operating parameters of the cell, it is found that shortening the inter-electrode distance can reduce the gas volume fraction, increase the electrolyte flow velocity in the side inter-electrode channels and decrease the velocity in the middle inter-electrode channels; increasing the anode radius will reduce both the gas volume fraction and the liquid phase flow velocity; increasing the electrolyte liquid level has little effect on both, while increasing the current intensity will increase both. 3D electric-flow field and 3D electric-magnetic-flow field models were established to analyze the effect of electromagnetic force on the liquid phase flow velocity distribution in different cross-sections. The electromagnetic force weakens the formation of eddy currents in the yz cross-section of the electrolyte, and reduces the maximum velocity in the xy cross-section of the electrolyte, making the electrolyte flow more fully. A 3D electro-thermal field model of the lithium electrolysis cell was established. The heat generation and dissipation of the electrolysis cell were obtained through integral calculation, and it was found that the 30kA electrolysis cell can achieve energy balance. Based on the energy balance, the current intensity required for different structural parameters of the electrolysis cell was obtained. The equation between current intensity and structural parameters was established using the dimensionless method, and this equation can be used to directly optimize the structural parameters of the electrolysis cell based on the current intensity.

搜集汇总

背景与挑战

背景概述

该数据集聚焦于电池级金属锂电解槽的多物理场耦合优化，金属锂作为战略性资源在新能源等领域有广泛应用。通过建立二维和三维模型，模拟电场、磁场、流场、热场等物理场的相互作用，分析结构参数对电解槽能量平衡和电流效率的影响，旨在为电解槽的结构优化提供科学依据。