myecpro-laptop battery

The need to tell us about the main battery’s current mobile phone charging. In the past, using mobile lithium batteries, GPS and other portable terminals were powered by rechargeable most IC DC / DC or power conversion topology PMU to obtain power for the entire system. This approach has the advantage of simple structure, the cost is relatively low. However, its shortcomings can not be neglected because of their judgments according to whether the battery is fully charged current size, but in fact the system itself is also responsible for the current consumption of the battery, so that the system could not accurately estimate the battery is already full. To resolve this problem, people have begun to introduce a software-controlled method of recharging the battery continuously. However, this program brings the battery has lasted too long saturated with defects, resulting in the battery life reduced, and in severe cases will be an explosion. Therefore, the smartphone market, the original laptop belonging to switch-mode battery charging technology is also beginning to spread. 

The principle of switch mode charging easier to understand: the power switch when the role is to charge the battery with the system isolated from the AC adapter into the interface load, even after the power has been divided in both directions all the way to charge the battery all the way then through the switch to the system in DC / DC power supply directly. The introduction of switch-mode charging solution of unsaturated or saturated long-load problem, but new problems have also followed the emergence of China as an IT high-performance analog products business development manager for Zhang said “0.2 U.S. dollars for the power switch to the mobile phone is too expensive, and because the DC / DC directly about the high-voltage shocks, which leads to a failure rate higher phones mobile. Furthermore, it makes a ripple and noise will also affect mobile termination rates phone call. “ 

Portable terminals to meet the management of lithium load encountered in the above problem, the last of his four models for BQ24071 / linear battery charger IC, TI uses a single structure - apart from the charge controller The device also incorporates the two MOS tube (Figure 1). When, as a T1 pre-regulator, whose role is to filter over-voltage, ripple and noise of a variety of food, to address the laptop switch mode charging gaps. At the same time, 40mΩ of Q2 is used for active switching. A alleged that the general assets millisecond switch to another, Q2 time is only a subtle level, not only reduce their own consumption but also to avoid a reset of the system may occur in the phenomenon. In addition, Q1, Q2 and the current system can be detected, thereby avoiding a full battery is conducted to determine the possibility of errors. And when the battery is full, the absence of discharge channels appear not rejection phenomenon. To completely solve the lithium battery powered portable system, the battery charging all the problems.

Recall the number of the record industry’s most 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 department. 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.

It hard to recall the aftermath of the 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 the Tokyo Stock Exchange, Matsushita shares fell nearly 5 percent, to close at ¥ 2015.