what is vrla battery?

Question

If they can be used for feeding to a motor which in-turn will move a trolly.Exactly I want to move a 60 ton trolly with 10 kw dc motor which will get supply from these batteries and for speed control of this motor we can use plc/chopper.

Answer 1

http://www.sbsbattery.com/PDFs/AFT-GFT%20info.pdf#search='sbs%20vrla'

Answer 2

VRLA stands for 'Valve Regulated Lead Acid' and VRLA batteries are, in almost every respect, identical to the familiar lead-acid battery you have in your car.

The difference is that they use a 'sealed' construction and, as a result, require a lot less maintenence (keeping the electrolyte levels maintained, etc.)

The 'valve' refers to a pop type valve which will vent at a particular pressure if the battery temperature and pressure inside the sealed case become dangerously high. This usually happens if excessive load currents are drawn (short circuit) or if a charging circuit is used which forces too much charging current through the battery.

A 10 kw motor will produce a bit over 13 horsepower (1 horsepower is 746 watts) so you should be able to move a 60 ton trolly with it (unless the bearings are full of sand ) but be sure to size your battery bank so that it can operate for some reasonable period of time before it needs to be recharged.

It's usually a *real* good idea to gt a copy of the manufacturers data sheet for the batteries you'll be using and follow their recommendations about maximum current drain and charging current profiles.


Doug