What's the easiest way to desolder this so I can use these in parallel instead of as a series? Want expecting such a mess our I'd have just bought the two batteries separately. Thanks in advance everyone!
bought a battery pack, need to de-pack the batteries!
- Thread starter Chornbro
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- th_trl_thread_readers 0
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Wires and circuit board are free, now im left with just tabs. Board is sitting in place in same orientation as above. I imagine that these packs wont have a designated + and - if I strip them down,so can someone more knowledgeable double check which tabs on which batteries are pwr/gnd based on their orientation in the first pic as a series? Thanks!
i may be the only one who finds it scary that you're asking about repurposing the wiring of batteries AND asking about soldering
Very helpful and informative, thank you! Look forward to reading more posts from you.
I'll hit them with my meter when I get back to the workbench and figure out the +/-... then just resolder to the tabs.
Respectfully I somewhat agree with dwallen.
However I have a feeling that your going to move forward so.....
Use a good soldering iron/station with a big flat tip and crank up the heat. (I can't remember what the max temp is on the solder station I use when doing batteries, but I go to the max)
Then its just quick heat to get the solder liquid while giving some pressure to pull the pcb off the tabs, you just want to be careful with the heat.
It may be easier to cut up the pcb so your only dealing with individual tabs. I don't typically reuse the pcb anyway, I usually fold up the ends to make the pack a little smaller. But if you don't need the room then it isn't necessary.
Once you get the pcb off you will likely want to separate the cells from each other if they are stuck together so the tabs oriented the same. Rolling a toothpick or pulling some dental floss between the cells are the two best ways that I have heard to easily separate the cells.
Like dr g stated...If the tabs aren't marked you can test with a meter, if the voltage reading is negative then the tabs are the opposite of how you have the meter leads.
Then its just a matter of soldering the tabs together and wire.
However I have a feeling that your going to move forward so.....
Use a good soldering iron/station with a big flat tip and crank up the heat. (I can't remember what the max temp is on the solder station I use when doing batteries, but I go to the max)
Then its just quick heat to get the solder liquid while giving some pressure to pull the pcb off the tabs, you just want to be careful with the heat.
It may be easier to cut up the pcb so your only dealing with individual tabs. I don't typically reuse the pcb anyway, I usually fold up the ends to make the pack a little smaller. But if you don't need the room then it isn't necessary.
Once you get the pcb off you will likely want to separate the cells from each other if they are stuck together so the tabs oriented the same. Rolling a toothpick or pulling some dental floss between the cells are the two best ways that I have heard to easily separate the cells.
Like dr g stated...If the tabs aren't marked you can test with a meter, if the voltage reading is negative then the tabs are the opposite of how you have the meter leads.
Then its just a matter of soldering the tabs together and wire.
Bap, thanks for taking the time to post something that is actually meaningful, useful, and helpful. I've read a lot of what you've posted on here and you've helped quite a bit.
After reading what I posted again, I can see how it may appear that I have no idea what I'm doing... but I promise, thats not the case : ) I was on my phone, so I had to be brief. I was more looking for some quick suggestions or tips if they existed rather than a step-by-step how-to or guide to desoldering, repurposing, polarity, etc...
LiPoly 3.7v 2400mah 20C pack should make for a nice power source for my new DNA20 box : D
The way I see it in the first pic, the red wires are on the cell on the left (we'll call this cell A) and the black wires are on the right (B).
The white wire is soldered joining the two remaining battery leads.
If the above is correct, the red wires are the A cell's positive (pwr +), making the top left terminal the A cell's negative (gnd -).
That leaves you with the black wires on cell B it's negative (gnd -) and the top right terminal cell B's positive (pwr +).
Crappy ASCII diagram follows:
A | B
- | + <-top terminals joined with white wire
+ | - <- black wires
^
r
e
d
w
i
r
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s
The white wire is soldered joining the two remaining battery leads.
If the above is correct, the red wires are the A cell's positive (pwr +), making the top left terminal the A cell's negative (gnd -).
That leaves you with the black wires on cell B it's negative (gnd -) and the top right terminal cell B's positive (pwr +).
Crappy ASCII diagram follows:
A | B
- | + <-top terminals joined with white wire
+ | - <- black wires
^
r
e
d
w
i
r
e
s
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