Ok, ecco l'articolo....
R/C Batteries Tech Tips & NiMH / NiCAD FAQ
scrollare a circa metà pagina, poco sotto la prima foto.
In sostanza, dice che la storia del pacco che scarica (o carica) l'altro è una bufala almeno per quello che ci riguarda, poichè in 24h meno del 20% della carica del pacco carico si trasferisce al pacco scarico e noi non voliamo per 24h....
Rimane da capire una cosa: che succede se una cella di uno dei due pacchi da 4 celle va in corto? Ovvero di quanto cala la tensione dell'intero sistema?
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Q: Ok, thats pretty kewl.. but my instructor sez I need diode protection or the packs will cross-talk or try to charge each other.
A: Sorry.. your instructor has been gaffed by Under-Informed Magazine Columists or the Battery Mis-Information Committee of your local fields Wives Tale Tag Team. There is NO need for diodes or a 'backup' circuit board (something else that adds weight, complexity and another possible failure point) and in fact there's no flight-safety significant energy transfer between packs at different charge levels.
You can test this yourself.. just plug a discharged pack and a fully charged pack together in a Y-Harness and check the two packs the next day.. Youll find the system will pass a load test if checked through the Y, and youll also find that less than 20% of the charged packs energy has been used by the discharged pack when you separately cycle-test the two of them. Next, consider that your average flight is 10-12 minutes, not 24 hours! The mythical "Energy Transfer Between Packs" scenario is simply NOT a flight safety issue and checking both packs before flight with a loaded ESV will certainly 'pick up' a weak pack before you fly it anyway!"
Marco
edit: abbiate pietà se ho detto o segnalato c@zzate, ma sono un umile Commercialista, non un Ingegnere elettronico...
