Battery Li-ion battery recall sweeping the IT industry, a tough 15-year spread
Sony laptop battery recall incident a year later, a similar incident once again plagued Japanese home appliance businesses, the protagonist of this incident is Matsushita Electric Industrial Co., were recalled product is the cell phone lithium battery, this incident also shows that the battery industry is facing a The enormous challenge.
Recalled the most number of record industry's: fujitsu lifebook t5010 battery , fujitsu fpcbp200 , fujitsu fpcbp200ap , fujitsu fpcbp136 , fujitsu fpcbp136ap .
Nokia Tuesday announced that part of the Matsushita-made lithium-ion batteries overheating problems, the company will take the initiative to recall these products and for the user to replace the battery, it is learned, and the recall of events up to 46 million mobile phone. It is not clear that the company would recall and replace the number of batteries, but the number of recalled Sony batteries are projected to more than four times higher than the incident has become the industry's largest battery recall incident, together.
Since August last year, Dell announced that Sony held a large-scale production for notebook computer lithium-ion batteries, the battery industry has been plagued by such incidents. Almost all the major computer makers have announced and recall of Sony laptop batteries, while Sanyo Electric has recalled over mobile phone batteries and notebook batteries.
Battery recalls continue to occur on the one hand reflects the business-to-consumers more prudent and responsible attitude on the other hand also shows that the battery there are still many problems in production. Rechargeable lithium batteries in the past 15 years has been a laptop computer and cell phone industry, one important factor in the rapid development of lithium batteries is relatively cheap, light weight, environmental performance is good, much better than nickel-chromium batteries.
On the other hand, lithium battery current generated by larger, more complex manufacturing processes, heat and even easier to overheat, short circuit occurs when the consequences are more serious. Last year, some Sony laptop battery fire incidents have occurred. The recall Nokia Panasonic lithium battery allegedly occurred because the battery charger overheating.
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Mobile phone industry and the notebook computer industry's rapid development has exceeded the pace of development of battery technology, product features but also increasingly improved battery performance higher and higher requirements.
Lithium battery incidents occur frequently prompted some manufacturers to take a more cautious attitude. Toyota hybrid vehicle delay in the use of lithium battery plan. Nevertheless, industry experts still believe that despite the limitations of lithium batteries, but in the foreseeable future, it is still the most practical battery technology.
Sony announced this week that the company will spend 97.6 million U.S. dollars in Singapore to build a cell phone battery manufacturing plant in order to consolidate its market share. The plant will use more advanced lithium-ion polymer technology, the factory is expected to be operational by August next year, the initial monthly production capacity will reach 1 million by 2010 will reach eight million. Toshiba's ongoing efforts to develop alternative energy technologies, such as fuel cells, this battery does not use chemicals, but the battery for commercial still have a long way to go.
Panasonic is currently the world's four largest manufacturers of lithium batteries, the company said its the battery problem is generated in the manufacturing process. When used with an insulating layer to prevent short circuit damage occurs when the overheating arises. Nokia said that so far, Panasonic lithium battery overheating problem caused by only 100 cases were reported, but no serious injuries. However, Nokia will continue to take preventive measures to replace all the production date of December 2005 and November 2006 between the same origin as the Osaka battery.
Panasonic is expected to bear most of the costs to replace the battery is estimated to cost up to 170 million U.S. dollars. Affected by this news, yesterday in Tokyo Stock Exchange, Matsushita shares fell nearly 5 percent, to close at $ 2015.
Renesas released the smallest package size lithium-ion battery charge control: fujitsu lifebook t4220 battery , fujitsu fpcbp155 , fujitsu fpcbp155ap , Fujitus Battery , fujitsu siemens esprimo mobile v5515 battery .
Renesas Technology Corp. today announced the launch of R2A20051NS lithium-ion battery charge control IC, it applies to products such as digital cameras built-charging circuit. Sample was October 3, 2007 began in Japan.
R2A20051NS uses the industry's smallest 2.7 mm x 2.5 mm package size, while integrating a charging FET switch, as long as the addition of a resistor as a peripheral device charging circuit can be achieved. In addition, a number of various on-chip protection functions can simplify the security design.
"Product Background"
With digital cameras and other portable devices become more compact and slim, the installation of these devices smaller battery charging circuit is growing. At the same time, providing longer working hours, high energy density lithium-ion batteries growing popularity has brought with various protection features of the charging circuit needs to ensure a safe charging and the necessary complexity of security design.
There are two types of charge control, ie use a separate charger or a built-in charger. Renesas Technology currently mass production and widely used M62249FP lithium-ion battery charge control IC integrates most of the security charge protection for built-in charging control applications. Now, in order to meet the needs of smaller charging circuit, Renesas has developed the industry's smallest package size R2A20051NS, without changing the protection achieved under the conditions of the functional optimization.
"Features"
R2A20051NS main functions are as follows: fujitsu siemens esprimo mobile v5535 battery , fujitsu siemens esprimo mobile v5555 battery , S26391-F6120-L470 , SMP-EFS-SS-22E-06 , fujitsu lifebook b6210 battery , fujitsu lifebook b6220 battery .
(1) the industry's smallest package size, integrates a charging FET switch
The current Renesas products (M62249FP) using 5 mm x 5 mm package size of 28-pin QFN (quad flat no-lead package), R2A20051NS use a smaller 2.7 mm x 2.5 mm 10-pin SON (small no-lead) package This is the industry's smallest package. This is the most common applications by limiting the non-protection and reduce the number of pins to achieve. When compared with current Renesas products, the device can reduce the mounting area of about 75%, while integration of the charging FET switch, which allows for a smaller charging circuit.
(2) Almost all of the security protection for all the help to simplify charging safety design
R2A20051NS on-chip protection functions the same as with the current M62249FP, in fact, including the security lithium-ion battery all the necessary protection features, such as the adapter is detected, over charging, over-voltage and temperature protection features, as well as monitor the charging time of the two timing device. Take advantage of these features to add at least as long as the R2A20051NS components, you can implement complex security design of the charging circuit to help simplify the development process. In addition, you can achieve the 4.2 V +/- 30 mV of the charge control voltage to achieve high-precision charge control.
(3) The built-in chip temperature detection circuit
R2A20051NS chip integrates a temperature detection circuit, the charging process based on the chip temperature limits the charge current value. Moreover, if more than a predetermined temperature, it will mark the error and run charge thermal shutdown features to help achieve a more secure implementation of the charging circuit.
Future plans include the development and timely release adjustment through the use of digital products to meet the demand for more features.
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