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#1
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Re: Batteries
I wish Hawker would sponser first. Especialy with something like their Genisis series. We use those on are BattleBots and they probally the best lead acids you can get. They are so durable you can charge a 18Amph battery in 15 min. Plus they can definatly put out.
I was also wondering what kind of cells I should use for my airsoft gun, weather it be NI-CAD, NM-HD, or LI-ION cells. I'm looking for 8 1.2 volt cells that can pack a punch as far as instantainious current draw. They need to be about the size of a AA cell. I would also like to have a large amount of amprage. |
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#2
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Re: Batteries
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#3
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Re: Batteries
The batterys that FIRST gives us can be used for lots of things. I believe they are used in electric wheelchairs, for emergency lighting, for un-interuptable power supplys
and I bought one a couple years ago to power the running lights on my Hobie Cat sailboat - it will keep the lights on for about 8 hours. The big difference between the various battery chemistries is Amp-hour capacity vs weight and size. The batterys we use are somewhat heavy and large - a nicad or Nickle metal hydrid pack would be smaller and lighter, but far more expensive weight is not a primary concern for our bots - we almost never need high acceleration or speed, or cornering ability - so the sealed lead acid bats work well. If they gave us $200 batterys that were half the weight, you would hardly notice the difference in the performance (speed and handling) of our robots but you take 6 or 8 pounds off a radio controlled airplane, and it makes a huge difference in its glide slope. Thats why RC pilots spend the extra $$$ for the more expensive batterys. |
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#4
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Re: Batteries
As for the issue of starting a car, it is possible to do with a FIRST robot style battery. http://www.harborfreight.com/cpi/cta...emnumber=39954 I have one of these things and you can jumpstart a car at least 4 times before it doesn't have enough power to do it again. Also, what about those things you plug into the cigarette lighter to jump a car. How do they work and what batteries do they have?
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#5
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Re: Batteries
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This is just what seems to me to be going on. I've never done it and, until now, haven't really been familiar with the practice. If I'm wrong, please correct me. |
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#6
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Re: Batteries
I've been looking for a place in San Diego that sells TLP 4000C IntelliChargers like the one pictured below.
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#7
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Re: Batteries
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There really are disadvantages and advantages to all three of them. SLA's have high internal resistance which results in large and sudden voltage drop.Last edited by Adam Y. : 29-12-2003 at 18:07. |
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#8
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Re: Batteries
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An extra 6 lbs to play with would make a big diffrence in what we could do. Wetzel |
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#9
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Re: Batteries
only if you failed to plan out your weight budget.
there is no reason FIRST could not increase the weight limit by 6 lbs if it were really a serious limitation its not. |
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#10
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Re: Batteries
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"An extra 6 lbs to play with, would make a big difference in what we could do!" Then... within 2 years of that... 148lbs, because (you guessed it): "An extra 6 lbs...." This is why it's an engineering design challenge! If you want it to be easy, go do battlebots .Besides Jeff, would you really WANT to give Wildstang 6 more lbs of aluminum? I mean... jeez. John |
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#11
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Re: Batteries
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