Batteries

cypressfalls Robert
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Re: Batteries

Postby cypressfalls Robert » January 23rd, 2010, 10:22 pm

This is just a random thing i learned about battereies.
Ok so I was at competition and we had just finished with our mission and without thinking I just shoved the extra 9 volt batteries I had in my jacket pocket. In an hour I began feeling a burning sensation as I was walking and then relizing it was the batteries I threw them from my pocket, the were boilling hot :o :? !!! The plastic coating was melting off and one battery had expanded abnormally creating a hole in the battery. :shock:
Lesson learned---->KEEP BATTERIES IN SEPERATE HOLDING CONTAINERS!!!!!!!or just not touching any other metal.

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Re: Batteries

Postby Primate » January 27th, 2010, 6:50 pm

cypressfalls_Robert wrote:This is just a random thing i learned about battereies.
Ok so I was at competition and we had just finished with our mission and without thinking I just shoved the extra 9 volt batteries I had in my jacket pocket. In an hour I began feeling a burning sensation as I was walking and then relizing it was the batteries I threw them from my pocket, the were boilling hot :o :? !!! The plastic coating was melting off and one battery had expanded abnormally creating a hole in the battery. :shock:
Lesson learned---->KEEP BATTERIES IN SEPERATE HOLDING CONTAINERS!!!!!!!or just not touching any other metal.

Wow, I'm impressed you managed to keep the two terminals touching for so long. Did they end up getting clipped together. (Which, by the way, is a known flaw in 9V batteries.) My recommendation is to bury your nine volts deep beneath the surface of the earth, and replace them with a nice set of 4 D-cells :D.
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Re: Batteries

Postby cypressfalls Robert » February 3rd, 2010, 6:31 pm

What is a good way to keep all those wires out of the way in the mission, because mine are just there, with maybe some tape here and there but thats it.

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Re: Batteries

Postby andrewwski » February 3rd, 2010, 7:29 pm

Ty-raps?
Please read Forum Rule #2:
2. Posts should have a legitimate purpose.

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Re: Batteries

Postby Uncle Fester » February 7th, 2010, 9:42 am

Besides the tie-wraps themselves, they make those little square things you can stick or screw to your box, and run a tie-wrap through a slot in them. They're great-- you can fasten stuff down ANYWHERE without going into contortions.
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Re: Batteries

Postby courage7856 » February 28th, 2010, 5:36 am

We are using a very very very simple circuit, and used duct tape/ electrical tape (it really doesn't matter) to connect our batteries (D batteries, by the way). The only thing is that you have to be careful on the ends of the batteries that the heat can melt both kinds of tape. It can also give you nasty burns or burn the paperclips you were using as wires. Nasty stuff.
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Re: Batteries

Postby Paradox21 » February 28th, 2010, 8:46 am

courage7856 wrote:We are using a very very very simple circuit, and used duct tape/ electrical tape (it really doesn't matter) to connect our batteries (D batteries, by the way). The only thing is that you have to be careful on the ends of the batteries that the heat can melt both kinds of tape. It can also give you nasty burns or burn the paperclips you were using as wires. Nasty stuff.

If your wires are heating up, it means you have too much current in the circuit. Try using different batteries and/or thicker wire.
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Re: Batteries

Postby fleet130 » February 28th, 2010, 3:14 pm

When making connections with tape, they tend to have a lot of resistance. This causes the connection to heat up when the circuit is powered up. This heats the tape and softens the adhesive. If this is a problem, strip the insulation farther back so more bare wire is exposed and bend the bare wire in a spiral so there is more surface in contact with the battery. This will reduce the resistance and produce less heat.
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Re: Batteries

Postby Flavorflav » February 28th, 2010, 4:24 pm

Paradox21 wrote:
courage7856 wrote:We are using a very very very simple circuit, and used duct tape/ electrical tape (it really doesn't matter) to connect our batteries (D batteries, by the way). The only thing is that you have to be careful on the ends of the batteries that the heat can melt both kinds of tape. It can also give you nasty burns or burn the paperclips you were using as wires. Nasty stuff.

If your wires are heating up, it means you have too much current in the circuit. Try using different batteries and/or thicker wire.
fleet130 wrote:When making connections with tape, they tend to have a lot of resistance. This causes the connection to heat up when the circuit is powered up. This heats the tape and softens the adhesive. If this is a problem, strip the insulation farther back so more bare wire is exposed and bend the bare wire in a spiral so there is more surface in contact with the battery. This will reduce the resistance and produce less heat.

She said he was using paperclips as wires. That could help explain the heat problem.
Last edited by Flavorflav on March 3rd, 2010, 5:57 am, edited 1 time in total.

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Re: Batteries

Postby courage7856 » February 28th, 2010, 4:51 pm

Flavorflav wrote:
Paradox21 wrote:If your wires are heating up, it means you have too much current in the circuit. Try using different batteries and/or thicker wire.
fleet130 wrote:When making connections with tape, they tend to have a lot of resistance. This causes the connection to heat up when the circuit is powered up. This heats the tape and softens the adhesive. If this is a problem, strip the insulation farther back so more bare wire is exposed and bend the bare wire in a spiral so there is more surface in contact with the battery. This will reduce the resistance and produce less heat.

I think both of you guys missed the part where he said he was using paperclips as wires. I think that explains the whole heat problem right there.


Yup. That's what I meant. I would, however, prefer to be referred to as "she" given that I am a girl. Me and my friends love to do the battery and paperclip thing, so when we saw that, we had to do it, even if it isn't the most effective way.
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Re: Batteries

Postby Primate » March 1st, 2010, 6:54 pm

courage7856 wrote:
Flavorflav wrote:
Paradox21 wrote:If your wires are heating up, it means you have too much current in the circuit. Try using different batteries and/or thicker wire.
fleet130 wrote:When making connections with tape, they tend to have a lot of resistance. This causes the connection to heat up when the circuit is powered up. This heats the tape and softens the adhesive. If this is a problem, strip the insulation farther back so more bare wire is exposed and bend the bare wire in a spiral so there is more surface in contact with the battery. This will reduce the resistance and produce less heat.

I think both of you guys missed the part where he said he was using paperclips as wires. I think that explains the whole heat problem right there.


Yup. That's what I meant. I would, however, prefer to be referred to as "she" given that I am a girl. Me and my friends love to do the battery and paperclip thing, so when we saw that, we had to do it, even if it isn't the most effective way.
I don't mean to impose myself upon your Mission, but you might definitely (absolutely positively) want to invest in some hookup wire, solder, and battery holders :P. I have yet to see anything that makes use of tape for non-aesthetic purposes reliably succeed.
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Re: Batteries

Postby fee6 » March 2nd, 2010, 5:54 pm

Are commercially produced battery boxes allowed (ie ones you buy at radioshack)
Sorry for the stupid question-we're not sure if these count as 'black box' components or not.

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Re: Batteries

Postby Dark Sabre » March 2nd, 2010, 6:13 pm

Yes, you can use battery holders.

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Re: Batteries

Postby Flavorflav » March 2nd, 2010, 6:22 pm

courage7856 wrote:Yup. That's what I meant. I would, however, prefer to be referred to as "she" given that I am a girl. Me and my friends love to do the battery and paperclip thing, so when we saw that, we had to do it, even if it isn't the most effective way.

My sincere apologies. It's just so hard to write gender-neutrally, so I tend to default to "he." No offense intended.

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Batteries

Postby Aveman625 » March 11th, 2010, 1:11 pm

I have a 9.6 volt RC car rechargable battery and I am trying to get it to where I can distribute power equally to all of my items, but the problem is the power is less and less with more items. Yes, I know that is series but I can't get parallel. I have a european style power bar, and I have tried numerous ways of connecting it. Can anyone help me distribute my power evenly?


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