5/27/2023 0 Comments Battery pulse teck![]() ![]() Unless they are certainly superior and have no hidden problems, there may be no good reason to use them. Super 'patented' chrome plated pulse methods MAY work better. Standard well tried well documented methods usually are "not too bad". The technique does work, and can even use the battery's own power to do it! However there isn't much point applying it to a battery that is in good condition. Pulse charging aims to break the crystals down so they will dissolve faster and restore capacity. A sulphated battery loses capacity because there is less acid available, and it may also have reduced current carrying capacity due to the crystal's poor conductivity. The crystals have low solubility and are not easily dissolved by normal charging. This is the formation of lead-sulphate crystals that occurs when the battery is left in a partially discharged state for a long time. However it is possibly more useful for dealing with the second lead-acid battery problem - sulphation. Pulse charging may be able to charge at even higher rates without gassing if it can get a burst of current into the cell before it starts to gas. A charging system that is designed for AGM batteries can charge them a bit faster than normal SLA (Sealed Lead-Acid). However this increases pressure inside the battery, so it can only handle a limited amount of gassing. Current must then be progressively reduced to stop the voltage from rising, and the battery gets charged slower and slower (taking 20 hours or more to get a full charge).ĪGM (Absorbent Glass Mat) sealed batteries get around this slow charging issue by recombining the hydrogen and oxygen rather than venting gas. The reason this is a problem is that to prevent gassing the voltage must be kept safely below the point of electrolysis, so the battery can only be charged at maximum rate for a few hours. ![]() A 'flooded' or 'wet cell' battery can be topped up with deionized water, but sealed batteries cannot. Apart from the risk of explosion, the lost water needs to be replaced or the battery won't work properly. The first problem is that if voltage exceeds about 2.4V per cell the water in the electrolyte will break down into hydrogen and oxygen ( electrolysis). Lead-acid batteries suffer from two annoying problems. Experiments which have tried it report reduced battery life. Most solar-system charging is done with systems where the charge rate is limited by the solar panels, so you couldn't get too much pulse current if you tried.īurping the batteries is probably a bad idea. Most battery charging is done with pulses, from switch-mode power supplies. If the ambient temperature is low, you can use medium-higher rates for medium-length-periods when the battery voltage is low, because the battery voltage won't go too high until is is partly charged. You can use much higher rates for short periods because (1) If it's short, the battery won't over-heat, and (2), If it's very short, it's just charging the battery capacitance, so the voltage won't go too high. Particularly when you have cheap charging equipment that can't shape the charge curve, and/or Particularly when your real skills are at manufacturing batteries at a competitive cost, not battery chemistry, and you don't know any better. 1C charge rule is a rule-of-thumb to protect you from both of the real rules. The method includes measuring, during operation in the maintenance mode, the battery's voltage and comparing the measured voltage to a second threshold voltage.There are two fundamental rules of battery charging: you shouldn't let the battery get too hot, and, you shouldn't let the voltage get too high. The method includes operating in a maintenance mode if the battery's current consumption is less than the first threshold current, wherein operating in the maintenance mode comprises terminating application of the charging signal to the battery. The method includes measuring the battery's current consumption and comparing the current consumption to a first threshold current. ![]() ![]() The charging signal has an oscillating triangular waveform superimposed on a DC bias signal. The method includes operating the battery in a charging mode if the measured battery voltage is less than the first threshold voltage, wherein operating in the charging mode comprises applying a charging signal to the battery. Abstract: A method for charging a battery includes measuring the battery's voltage and comparing the battery voltage to a first threshold voltage. ![]()
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