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Batteries

Samsung SDI Aims to Drive Battery Business Growth in North American Automobile Market

Read the full press release below: SEOUL, South Korea–(BUSINESS WIRE)–Samsung SDI (KRX:006400) (President: Nam Seong Cho), a global leading company in the lithium-ion battery industry, introduced the prototype battery cell for electric vehicles (EVs) that delivers the world’s top energy density. Samsung SDI began to make its foray into the …

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New Lithium Ion Battery Shuts Down at High Temperatures (R&D Mag)

Stanford researchers have developed the first lithium-ion battery that shuts down before overheating, then restarts immediately when the temperature cools.  The new technology could prevent accidental fires, a problem in some technologies which rely on Lithium ion battery technology. For the battery experiment, the researchers coated the spiky nickel particles …

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Lithium Batteries DO Suffer Memory Effects

My piece on batteries and depreciation caused some frothing at the mouths of battery evangelists on Reddit, notably this one http://syonyk.blogspot.co.uk/2016/01/electric-car-battery-packs-and-longevity.html . Lithium battery fans repeat the mantra that “Lithium batteries don’t have memory effect” in the hope that repetition makes reality.   Sadly it doesn’t, and they do (suffer memory …

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Crumpled Nitrogen-Doped Graphene Sheets Developed as Cathode for Li-S Batteries (Green Car Congress)

Researchers at The Pennsylvania State University have synthesized highly crumpled nitrogen-doped graphene (NG) sheets with ultrahigh pore volume (5.4 cm3) and large surface area (1158 m2/g), which enable strong polysulphide adsorption and high sulphur content for use as a cathode material in Li-sulphur batteries. The wrinkled graphene sheets are interwoven …

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New Electrolyte for Solid-State Batteries Combines Polymer and Glass (Charged EVs)

Scientists at the DOE’s Lawrence Berkeley National Laboratory have developed a novel electrolyte that addresses many of the problems of solid electrolytes by combining the two primary types – polymer and glass.  In “Compliant Glass-Polymer Hybrid Single-Ion-Conducting Electrolytes for Lithium Batteries,” published in the Proceedings of the National Academy of …

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Cambridge University Talks about New Lithium Graphene Oxygen Battery

Cambridge University has announced progress (small) towards a Lithium/Graphene/Oxygen battery that might substantially increase energy density, narrow the voltage drop, and provide more cycles.  As usual, the press hype runs a few decades ahead of the reality (“London to Edinburgh on one charge”), but there is some progress here. http://www.cam.ac.uk/research/news/new-design-points-a-path-to-the-ultimate-battery …

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Delphi And Bosch Plan 48 Volt Mild Hybrid Systems (Gas2)

The new Delphi/Bosch drive systems use a 48 volt lithium ion battery along with electronic controllers for the battery and hybrid powertrain, a DC/DC converter, and an electrically driven turbocharger for the vehicle’s internal combustion engine. One big advantage of a 48 volt system is that it does not require expensive and …

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