battery

[Carlos]

Hello to all:
I want that somebody can help to solve this question:
Which is the difference of a loader of batteries of gel acid lead with regard to that of nickel cadmium. I attach I sends them three circuits of loaders and basically all are generating of current with the difference that one has the maximum tension to the exit of the regulator LM 317 of 15 volts and other they overcome it with the difference that they detect the tension of 13,8 v. and they cut the supply of currents.
Which the best loader is and simple for loads the batteries of my detector of gel acid lead?
Thank you
Carlos

[Carlos]

Re: battery

[Carl]

Re: battery

This second charger looks like it's a quick charge with an SCR shutoff. It will shove massive current into the battery until the battery charges up enough to shut off the TIC106C SCR, which then shuts off the other SCR. The meter indicates a 5A maximum but there's really nothing to limit the current and you risk frying the diodes or the transformer.

The other circuit looks a little safer to me, with the first LM317 regulating the voltage and the second LM317 limiting the output current. It will be slower though.

You should check what charge rate your battery can handle. But I still think the second charger needs a current limiter of some sort. Also, there are battery charging IC's available that can be programmed for quick charge followed by trickle, etc. Don't know any part numbers.

- Carl