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Re: [EVDL] Zener regs: Can I get use 'em & still get a full charge?

David Dymaxion wrote:
>> Lee's Zener regs lessen charging current through the battery by up
>> to 0.5 A, not limit it to 0.5 A. It makes overcharge less likely,
>> but it can still occur. If you are blasting the batteries with 30
>> A, these regs will limit it to 29.5 A through the batteries.

Adrian DeLeon wrote:
> Thanks, I could have worded that better. By limiting the charger
> output to <0.5A the zener regs should bypass almost all the current,
> preventing overcharge of already full batteries.

Both are right. An uncontrolled charger blasting 30a into fully charged
batteries will make their voltage rise well above 2.5v/cell. Not only
will this kill the zener-lamp regs, it will kill the battery!

But if you limit charging current, the regs can keep the battery voltage
down.

So, you really need a control mechanism that prevents your charger from
running wild at the end of a charge cycle -- regs or no regs.
--
Lee A. Hart | Ring the bells that still can ring
814 8th Ave N | Forget the perfect offering
Sartell MN 56377 | There is a crack in everything
leeahart earthlink.net | That's how the light gets in -- Leonard Cohen

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