The circuit is also recommended for use as a conditioner for new batteries. C4 provides the return path for the current pulse that is injected into the battery, and l2 prevents c4 from absorbing the pulse itself. Never use it to power a low voltage electrical system, or for attempting to. Buy 12 volts lead acid battery desulfator assembled kit with reverse pol protection. Charging a lead acid battery through pwm method is said to initiate desulfation, helping recover battery efficiency to some levels. This charger will charge any lead acid battery, no matter what the battery voltage is. Charges and maintains your battery without overcharging it, guaranteed. The problem is that we dont live in an ideal world, and when a lead acid battery is repeatedly overused or run dead, especially if its really old, lead sulfate ions can grow increasingly. Sulfation and how to prevent it battery university. While this does work, the inductor can only hold so much energy each pulse.
In a recent scientific journal it was stated that 80% of lead acid batteries eventually fail due to sulphation. A place where builders and u lead acid battery desulfation lead acid battery desulfators pulsers recover old batteries and extend the life of new ones. There is plenty of information online about how to build a battery desulfator including schematics and there are books that offer diy battery desulfator plans too. If the layer gets too thick, then the desulfator cant apply a high enough voltage to break through it, and the battery is. Lead acid battery desulfator alastair couper 2000 alastair couper it was twenty years ago that i left my ongrid home, and my job as an electronics engineer, to begin life on an alternative energy oriented organic farm. Use a digital voltmeter and a temperature compensated floating ball type or gauge type hydrometer for the testing, and a batteryminder charger maintainer to avoid future problems with battery sulfation. Battery desulfator errata leadacid battery desulfator. This device will restore a completely sulfated not a shorted or high resistance connections between cells battery in about 2. Pulse generator for 12v lead acid battery desulfation r2 is pulse width. How to desulfate a lead acid battery with epsom salt. Just assume around hz, though youll want to make it adjustable. Dtl1 dtl3 t2 vlog dts2 dts4 dts1 dts3 ts vsig rsig1 10k cts 100nf rsig2 33k brief description. Currently sold as the product version are also available. I just found a quick n dirty battery desulfator circuit on instructables.
A major lifelimiting problem with leadacid batteries is that when discharged partially or otherwise the resulting lead sulfate slowly transforms into an insoluble form that eventually disables the battery. I use a 50 mfd ac motor run capacitor for a 2 amp current limiter, just enough juice for a slow overnight desulfating charge. What is sulphation in lead acid batteries sulphation is a process where the sulfuric acid present inside lead acid batteries react with the plates overtime to form layers of white powder like substance over the plates. Battery desulfator errata in my battery desulfator article. Battery reconditioner desulfator rejuvenator range from. Diy cheap battery charger desulfates old lead acid. Im convinced if you ran the desulfator to clean up between the plates, then pull the top off the battery with the lead plates and installed the top in a new case, add new acid, seal up the case, you could get several more years of battery life. Before we answer the question of how to desulfate a lead acid battery with epsom salt, it is important to first answer the question what is battery sulfation and explain why it is a problem before answering this let us understand few terms. This varies from model to model, and from manufacturer to manufacturer.
Please contact our tech support department for more information. Easy handling no special handling precautions or shipping containers, surface or air, are required due to the leakproof. Dual voltage model desulfator designed to recover or extend the cycle life of all types of 12 and 24 volt lead acid battery packs up to 500ah. In the intervening years, i have installed, maintained, and experimented. In this paper we audit the strategies for the desulfation of leadacid battery. This technique is used to overcome the premature loss of battery capacity and speed up the process of charging and extend the lead acid battery life cycle. Terms and definitions charge voltage each individual battery model has a specific charge voltage per cell that it is designed to perform optimally at.
When i connected the device in a battery, the circuit is working. They are chemically charged with an electrolyte which is a mixture of distilled water and sulphuric acid. But i think first it helps to understand a bit about how a lead acid battery works and what sulfation and desulfation are. Various strategies for desulfation are pulse width modulation, pressure feedback, resonant. Battery desulfators fact or fiction import tuner magazine. Abstractthis paper studies the impact of pulse voltage as desulfator to recover weak automotive lead acid battery capacity which is caused by sulfation. Battery desulfator circuit electronics projects circuits. Avoid sulfation with our 6 volt battery charger maintainer. The leadacid battery fees generally apply to batteries typically designed for use in a vehicle, watercraft, aircraft or equipment, and are primarily composed of both lead and sulfuric acid liquid, solid, or gel, weighing over 5 kilograms about 11 pounds, with a capacity of 6 or more volts. I can see the led is glowing little and i can hear its switching magnetic flux developed around l1 and l2 in my am receiver. Inside view of lead acid battery before and after desulfator. Many a lead acid battery have fallen victim to premature death by sulfation, but this process can be slowed, reversed and mostly prevented simply by utilizing the proper tools.
Lead acid battery sulfate contaminated plates designed to solve. Pulse generator for 12v lead acid battery desulfation. A lead acid sli battery desulfator which is powered by the batteries wh it is conditioning when a motor associated with the batteries is off. I am sceptical about the claims made for that system the stuff about the resonant frequency of the battery sound like snake oil to me but i am no expert on leadacid batteries. Economical the high watthour per dollar value is made possible by the materials used in a sealed lead acid battery. The following, if done correctly, will tell you more about the condition of your battery than any anecdotal history ever would.
Most lead acid battery desulfators out there use a flyback design with inductors. I dont really have time to check for minor grammatical errors. The auto pulse battery desulfator rejuvenatorrecovery unit uses no external power and generates a high. Pic12f629 leadacid battery desulfator pic microcontroller. If pulses of electricity high frequency, high voltage, but low power are sent into the battery, rhythmic beating resonance of the plates causes the crystalline deposits to break up and the sulphate returns to the electrolyte solution. This circuit makes it possible to do something that was previously unthinkable. Normally, a wet cell lead acid battery fully charged at rest should be between 12.
As an experiment, i made a lead acid battery desulfator. It seems stuck at length information is the easy way to give the. A lead acid battery can produce a short circuit current high enough to weld a ring or the like to metal, causing a severe burn. Electronics projects, battery desulfator circuit power electronic projects. Every lead acid battery has a resonant frequency at around 2 to 6 megahertz. This sulphation occurs due to general old age, nonideal charge. Learn more about battery restoration, sulfation and the methods used to combat this destructive force. Battery chargers free delivery possible on eligible purchases. Before we begin this circuit although simple in design requires.