05 mars 2015

Better Battery-Control Software Could Double Charging Speed: Research

2014-chevrolet-spark-ev-prototype-sausalito-ca-nov-2012_100409382_l New battery charge estimation algorithms developed by engineers at the University of California (UC), San Diego, are on the verge of vastly improve the capabilities of current lithium-ion batteries. The changes center around improving charging times, potentially allowing for batteries that charge twice as fast as those currently available.The new algorithms make the process of monitoring battery packs much more sophisticated, not only allowing the... [Lire la suite]

02 février 2015

Understanding Lithium-Ion Battery Safety and Its Implications

The National Transportation Safety Board (NTSB) report about the January 7, 2013, fire on board a Japan Airlines Boeing 787-8 aircraft at Boston’s Logan Airport said that the fire involved a lithium-ion battery located in the aircraft’s the auxiliary power unit (APU) and was followed by a second fire, nine days later, in Japan involving the main battery unit of another Boeing 787 aircraft. The NTSB determined that the probable cause of the incident in Boston was an internal short circuit within a cell of the APU lithium-ion battery,... [Lire la suite]
27 janvier 2015

Bosch cooperates with BMW and Vattenfall on a second life electric vehicles batteries project

What to do with valuable batteries once they have reached the end of   their life cycle in electric vehicles? A project involving three partners is connecting old batteries in Hamburg to form a large-scale storage  system to keep the power grid stable. Lithium-ion batteries still have high storage capacity at the end of their life cycle in electric vehicles. As a result, they are still very valuable and can be used extremely efficiently as stationary buffer storage for many years to come. The project allows the three... [Lire la suite]
02 janvier 2015

Graphene Could Kill Lithium-Ion Batteries

Don’t break out the widow’s weeds just yet, but it looks like momentum is building for energy storage to move past the lithium-ion phase and get into the more powerful territory of lithium-sulfur technology. In the latest development, a multinational research team has figured out how to overcome a major obstacle in the path of lithium-sulfur energy storage, by using graphene as a “bridge” between different components. In theory, lithium sulfur (Li-S) batteries possess far greater energy density than the familiar lithium-ion (Li-ion),... [Lire la suite]
20 décembre 2014

Volvo hybrid bus with Siemens fast-charging system starts service in Hamburg

Officially launched at the International IAA Commercial Vehicles show, the Volvo 7900 Electric Hybrid buses equipped with a Siemens fast charging systems has taken its maiden tour in Hamburg, where it will be deployed from December on the 109 service. The Volvo 7900 Electric Hybrid has an electric hybrid powertrain that combines a four-cylinder diesel 240 hp (177 kW) with an electric motor of 150 kW. The latter receives energy from a lithium ion battery of 19 kWh total storage capacity, this allows travel in electric mode a... [Lire la suite]