Consultez les proceedings de la Conference COMSOL 2024
Failure of conventional lead-acid battery is attributed to degradation of solid active mass (PbO2 and PbSO4 ). A number of research efforts are underway worldwide to overcome degradation of active mass to improve the cycle life of lead-acid batteries. Soluble lead-acid flow battery ... En savoir plus
The characterization of Li-ion batteries is a relevant topic due to the recent developments in Electric Vehicles (EV’s) and Hybrid Electric Vehicles (HEV’s) applications. In order to manage these devices, accurate models are required. At NEXT ENERGY a two dimensional cell-level thermal ... En savoir plus
Introduction: The drawbacks of most commercial “advanced battery” solutions are high price, danger, and low recyclability. The most cost efficient, environmental-friendly, and safest solutions so far is based on lead-acid electrochemistry, a proven technology for more than 150 years. Key ... En savoir plus
在实验中发现锌对称电池运行过程中电解液会发生自然对流，针对此现象我们通过comsol中的三次电流分布和层流接口进行模拟，从而获得了电池运行过程中的电解液浓度分布，电压变化情况等信息 En savoir plus
In our dynamic energy landscape, it is increasingly important to utilize energy efficiently and minimize waste. To achieve this, advancing our research beyond traditional battery storage, which has numerous limitations, is crucial. One promising solution is compressed gas energy storage. ... En savoir plus
Introduction: Recently, Li-ion battery is being widely used as power source for various applications from electronic gadgets to automotive industry. The performance and cycle life of Li-ion battery are becoming gradually important issues as the applications are shifting from small scale ... En savoir plus
With a view to estimating electrical characteristics of a Polymer Li-ion Battery during specific charge and discharge conditions, a COMSOL Multiphysics® model has been developed that accounts for electrochemical phenomena inside the device. Cell model has been created using the Li-Ion ... En savoir plus
本工作的主要内容是探究软包电池在充放电循环中由电池自身产热导致的温度分布以及温度对电化学反应速率的影响。模型中的电池传热模型由八个尺寸为1cm×1cm×180μm的电池微元组成，每个电池微元被视为一个均匀热源，使用COMSOL Multiphysics中的固体传热模块。电化学模型使用COMSOL Multiphysics中的电池模块，通过P2D模型计算电池的充放电过程以及反应热。每一个P2D模型对应传热模型中的一个电池微元，将电池的反应热视为电池微元的单位体积产热量。在三维传热模型的每一个电池微元中植入一个域探针，用来测量每个电池元在充放电过程中每一个时刻的平均温度 ... En savoir plus
在设计方型电池充电策略时，往往需要先获得电池在不同温度的充电能力。制作方型电池三电极并测试其不同温度的充电能力过程繁琐且成功率低，因此通常采取制作相同材料的小容量软包三电极电池，进行不同温度、不同倍率充电测试并监控负极电位，作出充电能力曲线。但是小容量软包（<10Ah）与大容量方型（>100Ah）电池的结构差异较大，不能准确反映方型电池的充电能力。 利用COMSOL直接仿真长度约260mm，容量108Ah的方型电池的充电能力。在COMSOL中耦合锂电池模块和固体传热模块，建立方型电池模型。输入方型电池的设计信息，正负极材料半电池充放电数据和方型电池在-20℃、 ... En savoir plus
本发明公开了基于电化学-热-老化与三维降阶的电池组寿命预测方法，所述方法包括在单体锂离子电池伪二维P2D电化学模型上，加入用于描述单体锂离子电池容量衰减的副反应偏微分方程，再耦合三维降阶的传热模型，搭建单体锂离子电池电化学-热耦合容量衰减模型，进行参数校正后，加入边界相似性或平均算子方法搭建锂离子电池组寿命预测模型。能够准确预测电池模组的循环寿命及相关电化学与产热的各项性能，模型的计算速度和结果的吻合度高，并且大大减少了数据存储空间，为实现储能电站等大体量的电池包和电池簇的模拟仿真提供了方法。 1)通过COMSOL ... En savoir plus