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This project has evolved some , the basic rundown is I'm modding two Omnibots , one a regular the other a larger 2000 model. I will have two ezb kits , rad base idea was thrown out because of so much noise but could go back on the table if the omnibot drivetrain is too weak to pull it.
By jstarne1
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So robotmaker why will those PSUs work on a car battery and not a gelcell ?:)
because car battery is 13.6 volts without load and stays regulated near 12 volts with gelcell battery voltage starts at 12 volts then drops to about 10 volts.so you only get if lucky 15 min of use from 10 amp gel cell battery then PSU will stop working,with a car battery witch is made for always at 12 volts they have a alternator that keep it charged
ask any of the PICO PSU companies that sell them and will tell you the same
Actually I think they are both about the same voltage off the charger. They are both lead/acid batteries. The main difference is plate design. Auto batteries are made for very high current draw over a very short time. Gels are made more like a deep cycle battery. Lower current draw over a longer time. The acid in a gel is thickened with a gelling agent like fumed silica. A auto or gel resting at 12V is about 1/2 discharged. One at 10.5 is considered completely discharged and probably slightly damaged from doing so. The 50+ gel cell batteries I have charge to 13.5 volt. I think 14.1 is the most you want to hit them with to keep from drying them out. The oldest auto type battery I own is in my tractor . It was made in Jan. 2004 :O! I have some gels that still hold a good charge and they were made in 1999.
Now if you are using that PSU in a car (running) it would be getting 14 volts or so. Or if you were drawing more current then the small gel cell could provide then that would be true .
big problem with gel cells they dont stay charged,with car batteries they do,most spec on PSU SAYS NEED A AC ADAPTER
Checklist before paint - Cut shoulders and neck off Drill holes for IR cliff detectors Epoxy in front acc door Drill front radar holes and rear radar holes Drill mount holes for running lights
WiFi antenna mount Mount fan controller , DVD drive and ARC reactor....
I'm telling ya
they both do that. I got some gels that will put out 400 amps ! Voltage drops like a rock though to 10.5! I'm starting to like lithium type batteries more though . Ones like A123 are really safe and can deal with different loads. My stock Ducati battery weighs 13 lbs. They make one from A123 cells that weighs 2lbs! Amazing !
thats why they are bad for PSU ,VOLTAGE DROPS VERY FAST at 400 amp must weight a ton i have 2 gell cell rated at 12 volts at 35 amps each and they weigh 25 lb's each so at 400 amps looking at 250 lb most robot builders use LI-POLY because of the weight i had a 12 volt 10 amp hook up to PSU and less then 30 min when dead on the same battery using 6-24 pico-psu lasted over 4 hours but using the same load
get a half a day off saterday ,going to cleveland zoo and gardens and then late flight home have 2 robots waiting for me when i get home that i bought,one $40 and one $1000
What did you buy ?