Showing posts with label battery. Show all posts
Showing posts with label battery. Show all posts

Wednesday, 22 April 2015

Do you know the real reason for the lithium battery performance degradation it?

Li-ion battery has now been widely used in mobile devices, but the battery life is not long, 500 charging cycles will lose about 1/5 of capacity. In order to study the reasons for the lithium battery degradation, the US Pacific Northwest National Laboratory scientist using a powerful microscope to observe the success of the real-time status of the lithium battery charge and discharge.

The researchers found that when using the battery creates pressure and cause rupture electrode. In addition, for each charge and discharge cycle will leave traces of lithium electrode in addition to these "death" of lithium which can no longer play a role in the future of charging, and will cause a decline in battery capacity. The researchers also observed in the solid electrolyte interphase layer is formed on the electrode surface, which can "clog" the battery and affect its ability to charge.
Lithium who want to solve these problems, the use of alternative methods is one of the elements. In the future, magnesium, aluminum, or copper and other metals could become cheaper and stable alternative, however, the performance of these batteries is still not up to the level of lithium batteries.

Monday, 13 April 2015

China's BYD ramps up 'leccycar battery production in challenge to Tesla

Warren Buffett-backed Chinese car manufacturer BYD is aiming to compete with Tesla Motors by tripling its production of batteries for electric cars over the next three years.

BYD will produce an additional six gigawatt-hours' worth of batteries per year over the next three years, said company spokesperson Matthew Jurjevich, adding that with the support of consumer demand these production increases could be continued beyond the three years of increase scheduled.

If this rate of production increase continues to 2020, BYD would be set up to challenge Tesla Motors' $5bn Gigafactory in Nevada, which is projected to achieve an annual production capacity of 35GWh when it begins operating in 2016.

Rumours of difficulties in the development of the Tesla Gigafactory have been refuted by CEO Elon Musk. The company is, however, downsizing its Chinese operations following a bungled incursion into the market which has left its distribution centres overstocked. Tesla does not currently produce battery cells, instead sourcing them from Panasonic.

Reuters cites GTM Research as estimating the electricity storage sector growing from a $128m market in 2014 to being worth $1.5bn in the US alone by 2019.

While BYD electric cars aren't luxury models like Tesla's, BYD may be at an advantage in regularly utilising Lithium Ferrophosphate (LiFePO4) batteries in their Energy Storage Systems. LiFePO4 is a Li-ion battery technology which offers a considerably longer cycle-life than the batteries Tesla uses.

In 2010, BYD came first in Bloomberg Businessweek's Top 100. Businessweek claimed that Warren Buffett, though “legendary for his dislike of tech investments”, was persuaded by Charlie Munger “to buy a 10 per cent stake in BYD for about $230m. That was in September 2008. Today Buffett's piece is worth nearly $2bn.”

BYD recently partnered with Uber, who are running 25 of BYD's e6 models around Chicago as part of a ride-sharing venture with Green Wheels.

Friday, 6 February 2015

Super Capacitors and Super Capacitor Battery Technology Becoming Popular


When the industry agreed that the lithium-ion battery is still the main mode of electric vehicles energy reserves, some companies have already begun to consider the use of forward-looking ultracapacitor products as a lithium-ion battery is good supplementary equipment.

Compared to conventional batteries, super capacitor can store electricity is not much, so the super capacitor and can not be used as a power supply device. Super capacitor has the ability to quickly release the stored energy, while the performance will not be completed in a short time to reduce the charge and repeatedly after charging.

Recently, the South Korean electronics company claims will invest $ 9 million to expand its transportation, power systems and consumer electronics products with super capacitor capacity. In the United States, has the ability to design and manufacture products for the material and super capacitor electrolyte companies Graphene Energy, EnerG2 and Ioxus three. Another company from a venture capital firm EEStor Kleiner Perkins Caufield & Byers as a background, currently the company has signed a supply agreement with the super capacitor electric car company Zenn.

Currently, there are already ultracapacitor products are used in consumer electronics products in the field, and some experts expect super capacitor as a supplement to green energy can make batteries, fuel cells, solar power or wind power and other more perfect way.

Technology industry consultants from Cambridge, IDTechEx chairman, said a combination of super capacitors (supercapacitor) with the advantages of lithium-ion batteries, and can be a car engine to charge the new type of thermal power storage device, will be the future include ideal power source for industrial transport trucks, military vehicles.

According to reports, this super-capacitor battery with a battery and super capacitor characteristics, usually somewhere in between; the power storage device has to lead-acid batteries or nickel batteries based versions, and the market's main concern is the use of lithium-ion type electrodes and supercapacitor electrodes, those asymmetric electrochemical double layer capacitor is also called a lithium ion capacitor, because the charge and discharge faster, and have other more excellent characteristics, a substituted Li-ion batteries and ultracapacitors potential .

Currently, the super-capacitor battery is gaining global carmakers each prospective favor, including BMW, Ford and other well-known brands. It is predicted that by 2020 the super capacitor battery will be common to all of the hybrid vehicle equipped with a thermoelectric energy harvesting devices and to further expand its market territory, gave birth to smaller super-capacitor battery. For example, the US predicted that by 2020, the use of such devices can be reduced by 70% of energy consumption