Side by side battery pack

[Soonerpede]

I had a little spill tonight (I'm stupid for driving in the dark) and my side by side GP4300 six pack comes apart. I didn't have the cells lined up very good when I glued them with Shoe Goo so I decided I would just take the pack apart, reglue, and resolder the bars on. As I'm taking the bars off solder from my iron tip drips and causes one cell to make contact with another and I thought it was going to blow because it smoked a bit and was hissing. After it stopped I was trying to get the bar removed between the two cells and when the solder would melt it would hiss a little. Do I have a damaged cell or does that happen sometimes? I checked the voltage with my multimeter and it still read 1.31v. I'm afraid to keep the soldering iron on much longer because I don't want it to blow in my face. Should I keep trying even though it hisses, or just toss a $12.00 cell away?

[jtcfanof3]

What the hissing sound is,is the cell venting,as in you have it way overheated!!!!
Hissing/venting is not a good sign!!!!!!
I had a cell do that too me,it was charging and I heard a hissing(venting)sound so I ripped it off the charger right away,I let the pack sit there next thing I know the one cells shrinkwrap(Sanyo 3000 cell)is ripping apart like the Incredable Hulks shirt when he gets angry!!!
Needless too say,the cell was junk,so you may have gotten away with it this time,but after a few charges that cell may die,will it explode?No dont think so as long as you dont keep overheating it again and again!!!

[Soonerpede]

Thanks for the info. I will definately wear goggles when I try to rebuild my pack. I sure hope it's got life left in it. I had only cycled this pack 4 times and it was really working great. I was gettin about 17-18 minutes of run time and it had great punch behind it.

[cooleocool]

How well the pack ran before the cell vented will not matter. Venting usually = a dead cell...

[Soonerpede]

If it's dead will it still read 1.3 volts with a multimeter?

[SS Pede]

1.3 volts sounds high for a dead cell. I mean, hissing is not good, but do you know for sure that it was the cell hissing and not something else, like the solder or something? Does the cell look normal? Unfortunately there's a good chance that it's dead, but I dunno about that 1.3 volts.

[Soonerpede]

I don't know if it was solder or the cell, but I don't remember ever hearing solder hiss. The cell was definately hot. I had been running the truck for about 10 minutes before this and I should have waited till they cooled. Sometimes my lack of patience can be expensive! :o

[jtcfanof3]

Venting usually = a dead cell...


Yep 90% of the time thats what happens.

[Soonerpede]

I rebuilt my pack and everything seems ok through one cycle. I realize that it probably took some of the life out of the battery, but at least for now it works good. I really need to shrink wrap my packs now, but I don't want to spend $5 for two wraps + shipping. What if I just wrapped the pack with elecrtical tape? Would that create too much of a heat blanket?

[cooleocool]

Don't use electrical tape! That will just act as an insulator .