Author Topic: battery charging question  (Read 1199 times)

0 Members and 1 Guest are viewing this topic.

Lolito

  • Newbie
  • *
  • Posts: 20
battery charging question
« on: March 05, 2007, 06:17:33 PM »
I'm a little new to this so bear with me.

My question is... If i'm putting 24 volts dc @ say 2 amps into a 12 volt bank would it charge faster than if I were putting in 15 volts @ 2 amps?, and is it a promblem if voltage is too high for your battery bank. What exactly does a voltage regulator do?

« Last Edit: March 05, 2007, 06:17:33 PM by (unknown) »

asheets

  • Sr. Member
  • ****
  • Posts: 368
Re: battery charging question
« Reply #1 on: March 05, 2007, 11:41:17 AM »
It really depends on the battery you are charging...  some are more sensitive to overvoltages than others.


Some of the possible different effects include:



  1. overheating
  2. adverse, non-reversal chemical reactions
  3. boiling off electrolyte


The purpose of a voltage regulator is to keep the charging voltage at the "sweet spot" for a particular battery.  For lead-acid batteries, it is 13.7VDC.
« Last Edit: March 05, 2007, 11:41:17 AM by asheets »

sdscott

  • Newbie
  • *
  • Posts: 43
Re: battery charging question
« Reply #2 on: March 06, 2007, 06:01:09 AM »
You won't be putting in 24V... the 12V Batt will pull the voltage down to somewhere around 15V(depending on the charging device i.e.VA), increasing the amps as a result.  A Battery is kind of an active device in this regard.
« Last Edit: March 06, 2007, 06:01:09 AM by sdscott »

mustang19432001

  • Newbie
  • *
  • Posts: 24
Re: battery charging question
« Reply #3 on: March 17, 2007, 08:43:39 PM »
A while back my cousin was charging a 6VDC battery with a 12 VDC charger. It caused the battery to swell up and spray acid onto the bench... talk about giving a table an acid bath. Thankfuly it was a chemistry table that had been burned a few times already.
« Last Edit: March 17, 2007, 08:43:39 PM by mustang19432001 »