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Jeff wrote in
: Why are you so obsessed about this, Larry? Its gotten to the point that you're just ranting nonsense! http://www.batteryuniversity.com/partone-13.htm Boiling the **** out of it isn't going to give it a saturated charge. It's voltage comes up because the plate surface becomes coated, but that's not charging it.....correctly. http://www.batterystuff.com/tutorial_battery.html http://www.bigginhill.co.uk/batteries.htm which says: "The Bulk Charge In this first part of the charge the battery is allowed to have a large draw on the available current. Usually the limit to this current level is determined by the availability of a suitably sized mains outlet, especially on large batteries. It is however, worth noting that that the life of a battery will be greatest if even this first bulk phase of charging is started off gently and the maximum current is limited. If the current is too high the result will be excess heating within the battery which is wasteful and could lead to buckling of the plates and destruction of the battery. Sizing of the charger to suit the batteries is important. Finish charge Once the bulk phase has been completed, the finish phase commences and the battery charge is topped off. This phase is very important. If the battery is not topped up gently it will overflow in the form of waste heat and violent gassing of the plates which again can lead to the plates buckling and the battery being destroyed. If the battery is not topped up fully, it will become sulphated after only a few charges and the result will be premature failure. Equalization In any cyclic application, a series of batteries will always need to be equalized from time to time in order to ensure that the battery cells remain at the same voltage throughout the pack. No two battery cells or batteries are created equal. During both charge and discharge each and every cell/battery will react in a minutely different way to its neighbour. This could mean that each battery may be holding a different quantity of charge. In order to get the most out of the total battery pack it is necessary to make sure, as far as possible, that each and every battery is holding a similar amount of charge. During the charge cycle the voltages of the different batteries will very. In order to bring them all to the same level it is necessary to give some a slight overcharge in order to bring the other up to full charge. Equalization is done by allowing the voltage to rise while allowing a small constant current to the batteries. The voltage is allowed to rise above the normal finish voltage in order to allow the weaker batteries/cells to draw more current. The stronger batteries will not be adversely affected providing the current is gently and the period and frequency of overcharging are not too high and great respectively. The stronger batteries will absorb the overcharge by giving off heat by gently boiling and gassing more heavily. Once the weaker batteries have absorbed the required current, the equalization charge can be halted. The equalization time should be long enough to bring all the batteries up to a full state of charge. As the time factor will very the most reliable way to check the charge states is by a voltmeter on each cell or individual battery. Really sophisticated battery charging and monitoring systems do not require the use of an equalization charge and are able to charge all the batteries fully including the weaker ones without overcharging the strong ones. In these systems, each battery is fitted with an electronic clamp, which gradually reduces the amount of charge going into the fully charged batteries as the finish charge progresses. This means that the weaker batteries receive more current to bring them up to a full state of charge and the strong batteries are prevented from being overcharged unnecessarily. The drawback with these sophisticated systems is their cost. The price of each battery clamp can be in the order of 1/5 the cost of each battery." Wishing it will charge in an hour is simply dreaming and really not good for any lead acid battery, no matter how much it costs. But, you have it YOUR WAY....(c; Larry -- Democracy is when two wolves and a sheep vote on who's for dinner. Liberty is when the sheep has his own gun. |
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