• Questions and Answers on Lithium-ion Batteries


    TOKYO, Jan 17, 2013 (AFP) – The lithium-ion battery that powers the Dreamliner has emerged as the focus of a probe into why an All Nippon Airways plane was forced into an emergency landing.

    Electrolyte leaks and burn marks have been found on the metal casing of the battery in the ANA operated plane, the airline has said.

    Here are some basic questions and answers on lithium-ion batteries.

    Q. What is a lithium-ion battery and what are they used for?

    A. A lithium-ion battery is a family of rechargeable battery types in which lithium-ions move from the negative electrode to the positive electrode during discharge, and back when charging. Lithium is a highly-reactive alkaline metal.

    Because it is generally lighter than other types of rechargeable batteries of the same size, it has been widely used for electronic gadgets such as laptop computers and mobile phones.

    Carmakers have recently started using lithium-ion batteries for their electric cars because they are lighter and more powerful than nickel-metal hybrid batteries that have been used in hybrid cars.

    Q. What are the advantages of a lithium-ion battery?

    A. Lithium-ion batteries have a high power density with a long life. They are also relatively light. The battery is able to take repeated charges because it has no so-called “memory effect”, a process in which other types of rechargeable batteries lose their powers of retention if they do not run down completely.

    Q. And the disadvantages?

    A. The batteries are currently more expensive than conventional nickel-cadmium and nickel-metal hybrid packs. Overcharging of the packs creates heat, which in some cases can cause combustion.

    Q. What could have gone wrong with the Dreamliner battery?

    A. Tatsuo Nishina, a battery technology expert at Yamagata University in Japan said he did not know the specifics of the case, but that overheating, either caused by a defect in the battery itself or in the electrical system to which it is connected, was a possible cause.

    “If people who don’t know the mechanism of lithium-ion batteries design the electrical system, it could cause trouble,” he said.

    1 Star2 Stars3 Stars4 Stars5 Stars (No Ratings Yet)


    Loading ... Loading …

    Comments are closed

     
  • Christina Yu Yu, PhD, an expert in Chinese art and culture, began her new role as director of USC Pacific Asia Museum (USC PAM). Among her priorities for the museum will be recruiting a new curator to help with selection of exhibitions and to direct co...
    Happy New Year! Rose Parade Float Trophy Winners...
    The Greater Los Angeles County Vector Control District issued a warning to San Gabriel Valley residents to be on the lookout for an invasive species of insect called the Asian Tiger Mosquito (Ae. albopictus) which could be carrying a debilitating virus...
    The Ice House on September 11 will present Last Comic Standing finalist Lachlan Patterson for one show only....
    Local fine artist Sam Nicholson is donating 25 percent of any of his paintings purchased by supporters of the Pasadena-headquartered non-profit Hillsides....
     
     
     
    Directory powered by Business Directory Plugin