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The Battery Chronicles

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    Guest Blog: Calculating the accuracy of a battery fuel gauge

    February 2, 2017

    battery fuel gauge

    By Onyx Ahiakwo

    A battery fuel gauge obtains data from the battery to determine how much juice is left. Do not misconstrue gauging accuracy for measurement accuracy. A gauge’s ability to accurately report state of charge (SOC) and predict remaining battery capacity depends on measurements including voltage (‘V’), current (‘I’) and battery temperature (‘T’).

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      Smart energy storage will define the future of everything: the grid, automobiles and gadgets

      By Patrick Mannion | January 15, 2017

      Vionx Energy field engineer Michael McNeely stands in the engineering house, monitoring vanadium redox flow battery tests. (Bruce Gellerman/WBUR)

      Vionx Energy field engineer Michael McNeely stands in the engineering house, monitoring vanadium redox flow battery tests. (Bruce Gellerman/WBUR)

      From smartphones to automobiles and the electric grid, energy storage is becoming more critical. For mobile devices, the need is clear for safe, longer-lasting, energy-dense chemistries. For automobiles, the move to hybrid, electric, and autonomous vehicles has increased the bounty to be had for denser and lighter storage.

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        How to profit from ‘The Year of The Battery’

        December 30, 2016

        Battery manufacturers – and would-be competitors – are experimenting with all manner of alternatives these days – from nanotechnology to Prussian Blue dye (used to color fabric, paints, etc.) to make cheaper, more powerful, longer lasting storage devices.

        The same forces are attracting massive investments in lithium battery technology, a market which is expected to grow from $17.5 billion in 2013 to $76.4 billion in 2020.

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          Supercapacitor battery charges in seconds, lasts a week

          December 30, 2016

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          Breakthroughs in battery technology are becoming increasingly common these days, a manifestation of years of multi-billion dollar R&D investments focused on advanced materials science in hot pursuit of a compact, renewable energy sources by the world’s automobile and electronics makers.

          The latest advance is a battery that charges in seconds and holds a charge for a week, a University of Central Florida development that could one day replace lithium-ion batteries.The new battery is highly flexible and measures a fraction of the size of a lithium-ion battery.

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            Toyota’s on track with new lithium battery technology

            December 29, 2016

            History of lithium superionic conductors – PhysOrg

            Toyota and the Tokyo Institute of Technology and High Energy Accelerator Research Organization (KEK) have reported a major advance in battery technology, in the form of new lithium-based superionic, solid-state, conductor materials.

            Toyota’s technology will allow the company to test various materials and battery structures, which is expected to be the basis of an improved electric vehicle in the next several years.

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              Spontaneous combustion hints at limits of Li-ion tech

               

              Forget snakes in planes, and creepy clowns; the spontaneous combustion problem with Samsung’s Note 7 mobile phone has spooked an entire industry.

              After replacement phones ignited, engineers still can’t say for sure if the smoke bomb effect is the result of a battery flaw or due to a circuit design bug, possibly in the phone’s processor. As a result, Samsung has ditched its popular Note 7 and recalled all units.

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                Nothing grounds you faster than bad battery design

                Fire video

                This video made the FAA nervous enough to issue a warning

                As frequently noted here, bad battery design can bring down the Internet of Things or any critical, sensor-based system that relies on internal power to supply DC voltage to circuits. A bum battery can even ground your flight.

                After photos were published this week of a burned and melted Samsung Galaxy Note 7 handset, the FAA advised passengers ‘don’t turn it on, don’t charge it, don’t pack it in your luggage.’

                The Battery Chronicles and other recent articles about battery systems underscore the critical nature and urgency of better battery design – especially, noted by Quartz, for a growing class consumers who want to stay connected to their always-on mobile devices, even at 30,000 feet.

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                  Ninety-two year old inventor of lithium-ion battery poised to create another breakthrough

                  Screen Shot 2015-11-03 at 10.37.02 PMJohn Goodenough, who invented the lithium ion battery 35 years ago, is in hot pursuit of his ultimate dream – a super battery that would finally displace the internal combustion engine.

                  In 1980, Goodenough then 57, aided by a team of post-docs at Oxford University invented the lithium-cobalt-oxide cathode, the pivotal component of every lithium-ion battery.  In 1991, Sony combined Goodenough’s cathode and a carbon anode into the world’s first commercial rechargeable lithium-ion battery, a product that revolutionized portable electronics.