jwatts@hpihoah.HP.COM (Jon Watts) (01/06/90)
There was a dicussion here about charging batteries a while back if anyone saved a copy I'd appreciate it if they could send me a copy. I have a need to build a charger for some sealed lead acid batteries and need to know the proper voltages/currents to use as a function of battery voltage an size. I have several configurations: 10V 3.8 Ahr, 10V 10 Ahr, 6V 2.5 Ahr. I also need to know how to tell when to stop charging and can the be floated on the charger (continuously connected). Another related question, for ni-cad and sealed lead acid batteries is it better to store them fully charged/fully dis-charged/doesn't matter? Thanks in advance, Jon Watts
phil@pepsi.amd.com (Phil Ngai) (01/09/90)
In article <5910001@hpihoah.HP.COM> jwatts@hpihoah.HP.COM (Jon Watts) writes: |I have several configurations: 10V 3.8 Ahr, 10V 10 Ahr, 6V 2.5 Ahr. I also |need to know how to tell when to stop charging and can the be floated on the |charger (continuously connected). I never found this out. I did get some plots of V vs charge from Yusa. |Another related question, for ni-cad and sealed lead acid batteries is it |better to store them fully charged/fully dis-charged/doesn't matter? NEVER store a l-a bat discharged. I wouldn't store a ni-cad that way either, but definitely NEVER a l-a. -- Phil Ngai, phil@diablo.amd.com {uunet,decwrl,ucbvax}!amdcad!phil
brian@ucsd.Edu (Brian Kantor) (01/10/90)
A very nice brochure I used to have from Gould electronics gave recommendations for float, deep, and cyclic charge/discharge cycles for lead-acid batteries, along with formulae for current and voltage limits. I'd suggest contacting your local battery supplier to see what they have in the way of technical data. Clearly the manufacturer of a battery is the first place to get valid numbers. - Brian