Jay Summet via EV wrote:
I'm looking to buy a kit (or an assembled) battery charger for a 120v
lead acid system, with an eye to upgrading to a LiIon system in the
future (also near 120-130 volts, limited by my controller/motor combo).
Hi Jay,
If you want to build it yourself, have you considered an "old school"
charger as an alternative? A 120vdc pack is the "sweet spot" for making
very simple chargers.
In the extreme, a "bad boy" charger is just a bridge rectifier off the
120vac line. Or a half-bridge from the 240vac line. Add a series
inductor to handle the current peaks (a "Bonn" charger), and you have a
decent charger. Add a plain old 60 Hz transformer, and you have
isolation (a "third world" charger).
The easiest way to regulate it is with phase control. Use two SCRs in
place of the diodes in the bridge. This makes it equivalent to the
Russco or K&W chargers.
The control circuitry is quite simple. So simple that a microcomputer
isn't required, though you can use one if that's what you prefer.
Such a charger is going to be more like a couple hundred dollars rather
than a couple thousand. :-)
--
Excellence does not require perfection. -- Henry James
--
Lee Hart, 814 8th Ave N, Sartell MN 56377, [email protected]
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