Safer laptop batteries produced

Dec 19, 2006

A heatproof battery for laptops, which could help solve recent problems with 
overheating, is to be mass produced by Japanese firm Matsushita.

It follows a series of incidents where batteries overheated or caught fire.

Sony has had to recall millions of laptop batteries in the last year and 
Matsushita and Sanyo also have had problems with overheating.

Matsushita has added a heat resistant layer to its lithium ion batteries and 
plans to step up mass production.

The company behind the Panasonic brand plans to produce five million units per 
month, up from 100,000 a month when the heat resistant batteries began shipping
in April.

Unsafe batteries have made headlines this year. Dell recalled 4.1m batteries, 
the cells of which were made by Sony, following reports of overheating problems.

Matsushita Battery Industrial , a subsidiary of Matsushita, said that it has 
improved the safety of its lithium ion batteries by adding a heat resistance
layer of insulating metal oxide on the surface of the electrodes.

As laptops become ever more power hungry so the need for higher capacity 
batteries has increased.

Matsushita hopes to step up production of heat-resistant batteries to half of 
all lithium-ion batteries it makes in 2009.

Currently it produces 15 million lithium-ion batteries for laptops and 10 
million for mobile phones.

It holds a 13% share of the global lithium-ion battery market, trailing Sanyo, 
Sony and Samsung.

All battery manufacturers are under pressure to develop safer batteries. The 
Institute of Electrical and Electronics Engineers is expected to produce new
standards for batteries by the end of next year.

The US-based Consumer Product Safety Commission has identified 339 cases 
between 2003 and 2005 in which batteries used in laptops and mobile phones have
overheated.

http://news.bbc.co.uk/go/rss/-/1/hi/technology/6193247.stm

Vikas Kapoor,
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