技術情報とプレゼンテーション

The future development of electric vehicles is now strictly linked with their batteries. In parallel of the actual research focused on the development of new materials and increase their performances in terms of energy, power, cost, durability and weight, it is necessary to develop ... 詳細を見る

Individual batteries have their own operational temperature ranges, which shall be respected to avoid both damaging of the cells and shortening of the cycle life. In terms of the Li-Ion cells, many of them do not function well at higher temperatures. Therefore, a better understanding of ... 詳細を見る

COMSOL Multiphysics was used to simulate the heat flux from battery cells via conjugate heat transfer physics which consist of laminar flow and heat transfer in solids and fluids. Laminar flow function was used to simulate natural convection of air within the sealed enclosure. Heat ... 詳細を見る

The ubiquitous commercial use of Lithium-Ion batteries (LIBs) has increased interest in their implementation into efficient energy storage systems for clean and renewable power sources and the electrical transportation industry. Unfortunately, LIBs are not yet technological mature to ... 詳細を見る

本研究围绕锌溴液流电池的性能分析，利用 COMSOL Multiphysics 建立了电化学过程的多物理场模型。该模型结合了电极反应与离子迁移等关键环节，用于描述电池在充放电过程中的特性变化。通过仿真获得了电压、电流及浓度随时间的演化规律，并比较了不同运行条件下的性能差异。结果显示，模型能够合理反映电池的主要工作机制，为进一步的结构设计与参数优化提供了参考依据。 詳細を見る

简介: 为了便于终端用户更容易获取到电芯内部相关的电化学参数数据，本文通过逆向拆解的方法结合电化学-热耦合模型，采用有限元仿真分析和电化学参数优化试验的方式，验证了所获取参数的精确性，并通过参数辨识的方式考虑了bruggman系数，反应速率常数和固相扩散系数对动力电池充放电性能和温度的影响，将对标锂电池的电压、温度误差范围控制在3%以内。 詳細を見る

Maritime transport contributes to about 3% of global greenhouse gas emissions. Proton exchange membrane (PEM) fuel cells are considered among the most promising clean technologies for decarbonizing the maritime sector. Some of the main benefits of PEM fuel cells include highly efficient ... 詳細を見る

A design for the thermal management of the media used for packing Li-ion batteries used in hybrid and electric vehicles has been developed. The design satisfies all thermal and physical issues relating to the battery packs used in vehicles such as operating temperature range and volume, ... 詳細を見る

为防止动力电芯在大电流充放电时发生热失控，一般会在正负极连接片上进行局部减薄及打孔，从而形成一个容易熔断的区域，我们称为熔断器。当大电流通过焊印流入连接片，由于截面减小在熔断器区域将会产生较大的局部电流，从而使结构温度急剧升高，造成材料熔断，从而形成断路来保护电芯。 这一过程可通过COMSOL中的电磁热耦合模型进行仿真，考虑部件的散热条件、熔点、熔化潜热，通过仿真的结构最高温度与材料的熔点温度与熔化潜热换算温度之和做对比，从而判断材料是否会发生熔断以及通电多长时间发生熔断。对标了实际熔断器的熔断时间之后可以对熔断器的几何结构进行优化，可以设计出更加合理的熔断器。 詳細を見る

本研究针对浸没式电池热管理系统在静置工况下的自然对流特性展开探讨。采用新型低黏度油液作为浸没介质，设计了典型的电池热管理单元和模组。基于电池产热模型，利用COMSOL Multiphysics建立了三维数值模型，耦合求解传热与流体流动方程，并结合Boussinesq假设描述自然对流效应。通过实验对比电池在空气及油液中的放电温升，验证了模型可靠性，仿真与实测结果差异小于1.5 ℃。结果表明，随着浸没液厚度增加，自然对流逐渐增强，液体最大流速超过2.5 mm/s。液层厚度为10 mm 时，电池平均温度下降1.4 ℃，但温差由1.27 ℃增至 3.14 ℃ ... 詳細を見る