plz help me fix this battery

[cranberry]

i went to this hobby store and bought a 6 cell 1400 intelect battery, i bought it because the guy working there told me i could just sodder 2 extra batts on the end and that would do it. so he made it sound very simple. its been 4 hours and i cant do it. first off, i have sanded the batt terminals to hell and the sodder still wont hold to the battery, secondly, the metal conectors they sold me to sodder onto the batteries wont even hold.

i am VERY agrivated right now and i have tried EVERYTHING... plz will someone help me out here, is my sodder gun just a peace of shit or am i doing somethign wrong? or is it just not possible to make a battery?

PLZ HELP ME

thx danny

( i have many batts so its not like i cant play now or ne thing, i was just trying to make a 9.6V )

[Renegade)]

Whats the wattage on your solder gun, are u using any solder paste? Recomended when working with batteries...

BTW your gun has to be very hot and high wattage.

[cranberry]

its a 25 watt and it gets up to 400 Dagrees...

[Renegade)]

Not high enough, long term regular heat on a battery fries your cells, and u will never get the solder to stick, as you are having trouble doin. PM Kos-Mos or wait for him to get to this thread, he will have some good words for you.

[cranberry]

whats this soder paste and whats its purpose?

[cranberry]

what temp range should i be looking into then? whast the minimum watt/heat you recomend useing?

[Renegade)]

I use Acid Flux Paste, but theres others, its generaly to help heat the solder up faster, creates a paste on the joint and helps it stick better creating a much stronger solder.

[m102404]

Sorry to hear that you're having a hard time of it. There's a couple of guys on this forum that make their own. Here's what I know.
1. Use a hot soldering iron (mine goes up to 65W)...you want to solder things as fast as possible without heating up the cells. The solder should melt instantly, remove heat and let things cool down before moving anything.
2. I've only used 600 grit wet/dry paper to rough up the terminals before soldering...it's just what I have on hand.
3. Get everything ready and laid out before you start soldering. A little jig or vice is handy for holding everything in place.
4. On the packs that I've built, I prep the terminals (I think that it's called "wetting") with a little solder that I let cool before going for it.
5. I also prep any ends of wire with solder.
6. Then I just go for it and make sure I don't have one the cells backwards

Other than that...I can't think of anything else. I don't do a lot of battery packs, just things to get me by in a pinch.

[Qlong]

...yeah with 25watts, you need some patience, not recommended to solder cells tho, you have to let both the lead and the battery terminal warm up so the solder can fuse to the terminal. It is advised to use flux, better stronger hold, and easier to solder on.

Sand the surface, rub a bit of flux on, hold the iron with some solder on to the terminal and wait until the solder starts to fuse with it. Do the same to the connector. Then hold the lead and terminal together and use the iron to heat both until the solder melts and fuses.

Also make sure the two batteries you add on are of the same size and capacity.

I usually use my 120/200watt gun takes about 3 seconds

[cranberry]

thank you so much, i need to get a better solder gun. the one i got now is shit, its only a 25W and to be honest, i had nothing but problems well working with it. i will get a much larger solder gun and hope for the best,

thanks

Danny