Society of Robots - Robot Forum
Electronics => Electronics => Topic started by: Xyver on January 28, 2010, 10:00:36 PM
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What is the best kind of batteries to get? I'm just getting into robotics and plan on doing it for a long time (going to university for mechatronics) and was hoping to get some nice batteries to use. So... What size/type would be best?
I heard Lithium ion is good, anything else?
I plan on mostly using it for smallish projects, what voltage do I need? 6? 9? 12?
Price is no problem as I plan on using them for a lonnnnng time. (but hopefully they're still reasonable, Im still on a student budget haha)
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Well, the majority of the community here favor ni-mh batteries, usually 6v for running servos or 7v2 for running both servos and control circuitry.
But many users have been getting into li-on and have reported good results.
The batteries depend on what you are running, if its just some small servos, id go with ni-mh 6/7.2v.
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And most things will be Arduino powered. But that takes anywhere from 7-12 volts I hear. Where can I get cet batteries? I have some rechargable double AA's that Im pretty sure are NiMh. What amps is best? Higher=better?
EDIT:: I found some rechargable batteries. They are as follows:
4x AA Infinicell with 1.2V and 2600mAh
4x AAA infinicell with 1.2V and 850mAh
1x Energizer 9V that says 7.2V-150mAh.
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You will need other batteries for high current applications. 3-cell lipos are great, since they are right around 12 volts.
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Dont Lipos need a special charger?
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They need a li-po charger.
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Don't forget about LiFe!
Advantage: All the features of Li-Ion/Pol + more power and they don't explode
Disadvantage: Needs a special charger different from other lithiums.
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Dont Lipos need a special charger?
All batteries need a special charger that is design for that particular battery chemistry and construction.
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Don't forget about LiFe!
Advantage: All the features of Li-Ion/Pol + more power and they don't explode
Disadvantage: Needs a special charger different from other lithiums.
I don't know about more power. Less voltage per cell, more weight, less C rating, takes up more space per mah, etc etc. 70c lipos now exist on the market, too.
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Well, they last longer and don't explode. If you want long term, these are them.
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Well, they last longer and don't explode. If you want long term, these are them.
Which ones? LiFe?
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Yep. Lithium Iron Phosphate.
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Ok. Where would I get these batteries? Ive been googling them with no luck. I'll probably use what i have for now and then upgrade later. My friends getting some LiFe batteries for his electric bike but they are really big and and like 500$... I was thinking more small scale.
http://cgi.ebay.com/48V-20AH-LiFePO4-Electric-Scooter-E-Bike-Li-Fe-Battery_W0QQitemZ320475811159QQcmdZViewItemQQptZLH_DefaultDomain_0?hash=item4a9dd8cd57#ht_2083wt_941 (http://cgi.ebay.com/48V-20AH-LiFePO4-Electric-Scooter-E-Bike-Li-Fe-Battery_W0QQitemZ320475811159QQcmdZViewItemQQptZLH_DefaultDomain_0?hash=item4a9dd8cd57#ht_2083wt_941)
(actually more expensive then I thought...)
Theres also this :D
http://www.engadget.com/2010/02/03/horizon-debuts-h-cell-2-0-hydrogen-fuel-cell-system-for-r-c-cars/ (http://www.engadget.com/2010/02/03/horizon-debuts-h-cell-2-0-hydrogen-fuel-cell-system-for-r-c-cars/)
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The highest quality LiFes come from A123 systems - but they are pricey.
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Aren't you afraid that if you commit to some particular battery it'll constrain everything you design? Will your robots really get enough real world use that a few sets of alkalines won't do?
What is the best kind of batteries to get? I'm just getting into robotics and plan on doing it for a long time (going to university for
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All-Battery sells them to, but they can be hit or miss.
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m uncle uses lipos wi is rc gliders and says as long as you dont over charge em theyre fine ;D i was using 1 with a spectrum reciver and a arduino and sum elcheapo M.A.C.T.H.U (may admin continue to help us ;D) servos. . . . :P
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Well I was just getting some advice, I think LiFe's are a little too expensive for me. I'm going to get a bunch of NiMh batteries and that'll do me fine for now. Thanks guys! I really like the battery university link.