japan probe of boeing 787 battery finds signs of thermal runaway; battery maker's profit down - lithium ion cell
TOKYO -
A survey of overheated lithium-ion batteries on Japan's Boeing 787 flight last month found evidence of similar "heat Runaway" in similar incidents in Boston, officials said on Tuesday.
The Japan Transportation Safety Board said CAT scans and other analyses found that 787 of the batteries of all Japanese airlines had overheated in January and all eight had been damaged.
16. This prompted an emergency landing and investigation by the United States and the United States. S.
And Japan's aviation safety regulator.
They also found short signs.
A chemical reaction in which a rise in temperature causes a gradual rise in temperature. U. S.
Investigators found similar evidence in a battery that caught fire last month on a Japanese airline 787 in Boston.
Photos released by Japanese investigators show that six of the eight batteries in the ANA 78 7 battery are severely aging and the ground wire is worn and broken
Designed to minimize the risk of electric shock.
With regulators and Boeing investigating the issue, all 50 Boeing 787 aircraft were grounded.
The focus of the Japanese detector is on flight data recording as well as chargers and other electrical systems connected to damaged batteries.
Lithium-ion batteries are easier to catch fire when they overheat or short circuit
Than other types of battery circuits.
For safety certification, Boeing uses relatively light and powerful batteries to power a variety of electrical systems on 787, the world's first passenger aircraft made mainly of lightweight composites.
Investigators said earlier that they had found no evidence of quality problems with the production of 78 7 batteries in Kyoto, Japan
Headquartered in GS Yuasa, his own aerospace ambitions are brewing.
Tang said on Tuesday that April
Net profit fell by 3 in December. 6 to 5. 5 billion yuan ($59. 6 million)
A year ago, battery demand fell behind due to sluggish demand in Japan and overseas.
The company has been trying to turn its lithium-ion business into profitability. In April-
In December, its lithium-ion business released 7. 2 billion yen ($78. 2 million)
It said it lost money compared to operating loss 3.
26 billion yen-
The year ended March 31, 2012.