原帖由 amadeus3408 於 2008-7-20 14:15 發表
如圖所示,小弟有一堆就電池,都有記憶效應的問題,其中Ni-Cd/Ni-MH都有,小弟發現市售廉價放電器都不能達到完全放電,高級放電器又太貴,以玩懷舊車的我來說也 ...
會放死電 Ni-Cd無須放電,Ni-MH要放完電如果短時間唔玩要义电容量一半以上儲蓄, :$
If a cell's voltage reaches a designed value, that means the battery has discharge the stored capacity, but still the discharge action is continual, over-discharge will cause. Commonly the end voltage can be identified through discharge current, for example the end voltage is set at 1.0V/cell as discharged at 0.2C-2C, and 0.8V/cell at 3C or more, e.g. 5C or 10C. Over discharge may cause disaster, especially at heavy current or repeated over discharge. Commonly over discharge can make cell inner pressure raise, and the reversibility of activity materials both in positive and negative will be damaged. Even by charge only part can recover and the capacity is reduced obviously.
原帖由 觀星是答案 於 2008-7-20 22:52 發表
過放會反電壓, 最終會死電
唔死都會差唔滿
http://www.camlight.com/techinfo/whydischarge_4.html
http://www.batteryspace.com/inde ... n=Custom&ID=3#9
原帖由 amadeus3408 於 2008-7-22 10:11 AM 發表
昨天用0.5c充4300mA鎳氫電池,竟可充到6000?測電壓則到8.5V?太誇張了,但電表的最大承受電流太低了,所以不得而知
原帖由 lokaman 於 2008-7-20 15:13 發表
咁你認為点呢g4兄,我玩車時巳ni-mh為主,ni-cd容量太細同絕種,咁你有冇見過手提dcv ni-cd充電電鑽要放完電先可以义電,义電機都無放電mode,交流吓啫,不如問pm吓老人家問吓: ...
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