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Battery Desulfator Circuit

Desulfation is the process of reversing the process of sulfation
that occurs to a lead-acid battery over time. Desulfation restores, at
least partially, the ability of the battery to hold a charge over the
life of the battery originally caused by sulfation). Sulfation is the
formation of large non-conductive crystals of lead(II) sulfate (PbSO4)
on the battery plates. Eventually so much of the battery plate area is
unable to supply current that the battery capacity is greatly reduced.

Most DIY desulfator circuits in use today can trace their roots back
to an article in issue # 77 of Home Power magazine written by Alistair
Couper in June/July of 2000. Many versions were spawned by his design
but they all accomplish the same thing, that is, they use various
pulsing circuits to force the lead sulphate crystals back into the
electrolyte thus rejuvenating the battery and restoring its lost
capacity.

desulfator cip bjack3 swcadii schematic 567x642 264x300 Battery Desulfator Circuit
The desulfator shown schematically above is being simulated. So far it
shows promise. It combines features from multiple sources and sequences
through them using a simple arrangement of 555 timers. Microprocessors
are great for things like this, but for many people the programming
tools are not available.

The planned cycle has four steps. The first step is to pulse the
battery for 15 seconds using a Charged-Induced-Pulse described by
desufonator2. The second cycle is a settling period of 1 second. Third
is a 100 microsecond pulse that shorts the battery (180 amps?) to remove
dendrites. And finally, a 5 second period to measure the battery
voltage.

cip sequencer rev c sch 836x747 300x268 Battery Desulfator Circuit

Desulfation is the process of reversing the process of sulfation that occurs to a lead-acid battery
over time. Desulfation restores, at least partially, the ability of the
battery to hold a charge over the life of the battery originally
caused by sulfation). Sulfation is the formation of large
non-conductive crystals of lead(II) sulfate (PbSO4) on the battery
plates. Eventually so much of the battery plate area is unable to
supply current that the battery capacity is greatly reduced.

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