Researchers at the University of Illinois at Urbana-Champaign have experimentally shown for the first time that the thermal conductivity of lithium cobalt oxide (LixCoO2), a material used in the cathodes of lithium-ion batteries, can be reversibly electrochemically modulated over a significant range. Many technologies require control over the flow of heat through materials in … [Read more...]
Top 10 FloTHERM V10 Features – #4: Updated CAD
FloTHERM's strength has always its been its robustness, founded on a simplicity of technology that we've tried not to compromise over its 25 year life. This is no truer than in its 3D CAD drawing interface. More Lego than Sculpting in its capabilities, it's always been quick and easy to mock up a conceptual cooling architecture for a proposed design. FloTHERM V10 provides a … [Read more...]
Top 10 FloTHERM V10 Features – #3: FEA Interfacing
Temperature has always been, and will continue to be, a good enough leading indicator of product reliability. As a parameter it is easy to specify a maximum rating value and relatively easy to measure. However it is not temperature itself that directly causes product failure, more often than not it is some kind of mechanical fracture or deformation that itself is fuelled by … [Read more...]
Built-in Heat Spreading for Efficient Thermoelectric Cooling of Concentrated Heat Loads
Jeff Hershberger, Robert Smythe, Xiaoyi Gu and Richard F. Hill Laird Technologies, Inc. INTRODUCTION Thermoelectric cooling is an active thermal management technique. A thermoelectric cooler (TEC) has two circuit boards which are typically Al2O3 plates with copper circuit traces attached to them and semiconductor elements soldered between them. TECs are now available … [Read more...]
Solder Joint Lifetime of Rapidly Cycled LED Components
Wendy Luiten Philips Research, Eindhoven, the Netherlands INTRODUCTION Active LEDs in a consumer TV product are boosted and dimmed with the video picture content. Boosting and dimming of the LEDs is a powerful means to improve visual experience, either through application of active LEDs in an ambient light feature, or through dimming and boosting of the display LEDs in a … [Read more...]
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