外文資料翻譯---鋰電池充電器的設(shè)計-全文預(yù)覽
【正文】 the preferred battery in portable puter applications, displacing NiMH and NiCad batteries, and cellular phones are quickly being the second major marketplace for LiIon. The reason is clear. LiIon batteries offer many advantages to the end consumer. In portable puters, LiIon battery packs offer longer run times over NiCad and NiMH packs for the same form factor and size, while reducing weight. The same advantages are true for cellular phones. A phone can be made smaller and lighter using LiIon batteries without sacrificing run time. As LiIon battery costs e down, even more applications will switch to this lighter and smaller technology. Market trends show a continual growth in all rechargeable battery types as consumers continue to demand the convenience of portability. Market data for 1997 shows that approximately 200 million cells of LiIon will be shipped, pared to 600 million cells of NiMH. However, it is important to note that three cells of NiMH are equivalent to one LiIon cell when packaged into a battery pack. Thus, the actual volume is very close to the same for both. 1997 also marked the first year LiIon was the battery type used in the majority of portable puters, displacing NiMH for the top spot. Data for the cellular market showed a shift to LiIon in the majority of phones sold in 1997 in Europe and batteries are an exciting battery technology that must be watched. To make sense of these new batteries, this design guide explains the fundamentals, the charging requirements and the circuits to meet these requirements. Along with more and more the emergence of the handheld electric appliances, to the high performance, baby size, weight need of the light battery charger also more Come more battery is technical to progress to also request continuously to refresh the calculate way more plicatedly is fast with the realization, safety of need Want to carry on the more accurate supervision towards refreshing the process, to shorten to refresh time and attain the biggest battery capacity, and prevent176。Weakness is from turn on electricity the rate battery of NiCd of the typical model can refresh 1,000 expired mechanism mainly is a pole to turn first in the battery pack drive unit that all turn on electricity will take place the prevent176。froming refresh the electric current leads to causes battery lead greatly hot, the restrict of the electric current at this time very method Is a lithium battery basic to refresh and stop project. The actual lithium battery charger usually still continues into after attain biggest electric voltage Go the second stage refresh, to attain 100% battery capacity. For battery of NiCd and battery of NiMHs are originally method can Be the spare judgment stops refreshing the project. The method exploitation that this judgment of the dV/ dt – electric voltage variety rate stops refresh negative electric voltage variety the battery of some types, be the battery to be filled with the subsequence Refreshing continuously will cause electric voltage descend. At this time this project was very method usually useds for the ever to settle the electric current to refresh, Be applicable to to the fast charge of the battery of NiCd and battery of NiMH. Th
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