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Tag Archives: cell

Li-ion thermal knowledge pooled into one place

Rice Uni Li ion cell possibilities

US researchers have collated the temperature performance of different Li-ion cell technologies with a view to improving batteries. “People have not looked that studiously at temperature constraints. We searched hard to find one paper that talks about all the problems at the same time and what all the individual components experience at extreme temperatures, and we couldn’t find one,” said ...

Zinc sponge anode makes Li-ion alternative rechargeable

The US Navy has created a rechargeable aqueous zinc battery with performance approaching Li-ion cells. While useful in non-rechargeable applications – it is the basis for ‘alkaline cells’ – zinc electrodes tend to grow dendrites (whiskers) when charged, wrecking the cell. Scientists at the US Naval Research Laboratory (NRL) have created nickel-zinc batteries with 3D sponge zinc anode instead of ...

Not quite how lithium ions move in batteries

Institute for Basic Science Li-ion transport 10ps

The theory explaining how lithium ions move in batteries is not quite right, according to the Institute for Basic Science (IBS) in Korea, which has been examining the process in femtosecond detail. The model was, said IBS, that lithium ions (green dots) move surrounded by a shell of ethylene carbonate (EC, blue ovals) molecules, and that these entities (‘solvation shells’ or ...

UK firms to develop Na-ion batteries

Faradion

Faradion of Sheffield and Caithness battery make AGM Batteries have agreed to commercialise sodium-ion (Na-ion) batteries. Sodium is proposed as a cheaper alternative to relatively-rare lithium in rechargeable cells. “it is expected that sodium-ion batteries will also cost around 30% less to produce compared to conventional lithium ion technologies,” said Faradion, which has sodium ion intellectual property. One of the ...

Updated: Aluminium ion battery hits thousands of cycles for grid storage

Al-ion cell Stanford

Stanford University has produced an aluminium ion cell with “no decay over hundreds of cycles, even thousands of cycles”, according to scientist Ming Gong, yet it can be charged in a minute. Key to long life, according to a paper in Nature (‘An ultrafast rechargeable aluminium-ion battery‘), is using a three-dimensional graphitic-foam for the cathode. “People have tried different kinds ...

Stackable 16 cell Li-ion monitor chip

Lapis ML5239

Lapis semiconductor has announced a lithium-ion battery monitoring chip that supports 16 cells in series. ML5239 can be stacked for higher voltages, and is consumes only 100nA in shut-down. Applications are expected in power storage and uninterruptible power supplies. Each chip has its own ADC, and it looks like it is set up to control passive cell balancing. Sadly, little ...

UK firms invest in sodium-ion batteries

Faradion Na-ion battery

British battery start-up Faradion has almost £2m with which to develop sodium-ion batteries following further funding by existing investors Finance Yorkshire, Rising Stars Growth Fund and Haldor Topsoe. “A Japanese electronics giant”, said Faradion, earlier also provided funding. Sodium is far cheaper than lithium, and the firm claims batteries made from its cells will be virtually indistinguishable in terms of ...

Electric bike power pack design has MCU-less cell monitor

A lithium pedal electric cycle battery power pack design from mixed-signal chip firm ams is notable because it incorporates cell monitoring and balancing without the need for a microcontroller. The 48V battery pack design consists of up to 14 lithium-ion cells monitored by two AS8506 cell-monitoring ICs, with associated circuits to monitor the temperature and voltage, to implement passive balancing ...