标签: bettary

BettaryChargeNChesterSimpsonNationalSemiconductorBATTERYCHARGINGIntroductionThecircuitrytorechargethebatteriesinaportableproductisanimportantpartofanypowersupplydesign.Thecomplexity(andcost)ofthechargingsystemisprimarilydependentonthetypeofbatteryandtherechargetime.Thischapterwillpresentchargingmethods,end-of-charge-detectiontechniques,andchargercircuitsforusewithNickel-Cadmium(Ni-Cd),NickelMetal-Hydride(Ni-MH),andLithium-Ion(Li-Ion)batteries.BecausetheNi-CdandNi-MHcellsaresimilarintheirchargingcharacteristics,theywillbepresentedinacombinedformat,andtheLi-Ioninformationwillfollow.NI-CD/NI-MHCHARGINGINFORMATIONIntherealmofbatterycharging,chargingmethodsareusuallyseparatedintotwogeneralcat……