Articles techniques et présentations

NMC523电池因为其较高的容量，已经逐渐应用于动力电池行列，但是锂离子电池在使用过程中的不合理容易引发热失控事故。这项模拟工作是来验证探讨NMC523电池针刺热失控中的机理。模拟过程中用到COMSOL化学反应工程模块、全局常微分方程模块。通过模拟，能够看到针刺过程中电池电压变化以及跟随的温度变化。这项模拟工作参考了部分主流杂志的模拟思路，也融合了自己的理解从而进行建模计算。此次模拟能够为电池针刺热失控机理探究提供思路，也能够为正确使用锂离子电池提供建议。 En savoir plus

This paper presents a design of polymer based micro heater operating in the temperature range of 200- 250°C which could be operated at low voltage (battery operated). The micro heater has been designed and simulated using COMSOL 4.1, FEM simulation tool. Simulation was performed for ... En savoir plus

Model calibration and validation were implemented using experimental data from literature. We utilized a microfluidic electrochemical cell that was configured with parallel, rectangular, and multi-layered channels, which is operating in a co-flow mode. CO2 gas stream enters the cathode ... En savoir plus

Using COMSOL Multiphysics 3.5, a numerical model has been developed to determine the effect of the channel geometry and electrode configuration on cell performance based on polarization curves. The Butler-Volmer equation was implemented to determine the reaction rates at the electrodes. ... En savoir plus

The US Advanced Battery Consortium (USABC) has established goals for long term commercialization of advanced batteries for electric vehicle applications. In this work, a dual lithium-ion insertion cell with silicon as the negative electrode and an intercalation material as the positive ... En savoir plus

This poster outlines the results of finite element analyses to study the antenna radiation pattern of an implanted medical device. Also presented are simulation results used to design an electrically small antenna for a portable control unit that communicates with the implants over the ... En savoir plus

LiveLink™ for MATLAB® is used to fit the surface temperature of a battery cell within a COMSOL Multiphysics® model to the temperature measured by a thermal imaging camera. The test bench was designed and built up of ourselves to allow nondestructive thermal diffusivity measurement of Li ... En savoir plus

Enzymatic biofuel cells (EBFCs) are miniature implantable power sources, which use enzymes as catalysts to perform redox reaction with biological fuels such as glucose. In this study, we focused on a three dimensional EBFC chip with highly dense micro-electrode arrays, fabricated by ... En savoir plus

Solid oxide fuel cell (SOFC) is a kind of high-temperature fuel cell which directly converts the chemical energy of the fuel into the electrical energy. The high efficiency and fuel flexibility of the SOFC has widened its applications in the field of energy. In the present study, a 3-D ... En savoir plus

There is great interest in developing all-solid-state lithium-ion batteries. They are ideal micro-power sources for many applications in portable electronic devices, electric vehicles and biomedical engineering. It is known that all-solid-state lithium-ion batteries are often fabricated ... En savoir plus