Sondring batteries together - how can it be done?

Discussion in 'General Electronics Chat' started by Rune2504, Feb 8, 2018.

  1. Rune2504

    Thread Starter New Member

    Jun 18, 2017
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    AD5A1AB6-C986-43F7-BB72-03AC2B47A2A6.jpeg
    Hello AAC

    I am trying to sold these batteries together, but I don’t know how to sold on the button and top of the batteries. The soldering tin won’t stick with the wire to it. I really hope some of you can help me with this problem, thanks :)
     
  2. ericgibbs

    Moderator

    Jan 29, 2010
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    hi,
    What are the battery case sizes eg: C, AA, AAA .?
    E
     
  3. Rune2504

    Thread Starter New Member

    Jun 18, 2017
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    The batteries are lithium batteries, I took them from an old laptop battery-pack
     
  4. ericgibbs

    Moderator

    Jan 29, 2010
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    hi Rune,
    I have end soldered to NiCd and Alkaline, but would not consider soldering to a Lithium battery, it is a very unforgiving metal when heated.
    Will those cells fit into a regular battery holder.?

    E
     
  5. Rune2504

    Thread Starter New Member

    Jun 18, 2017
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    Oh, yes I guess, so what you recommend me is to find some battery holders, ofc., didn't even think about that. It's because I took a Power Bank and wanted to add the old laptop batteries to it, but yea, as you say I should get some battery holders.
     
  6. ericgibbs

    Moderator

    Jan 29, 2010
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  7. Rune2504

    Thread Starter New Member

    Jun 18, 2017
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    Thank you!
     
  8. Dodgydave

    AAC Fanatic!

    Jun 22, 2012
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    Get a file or screwdriver and scratch the terminals, then you can solder them .
     
    #12 likes this.
  9. MaxHeadRoom

    Expert

    Jul 18, 2013
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    There are some links out there to some that have made simple capacitor discharge Stud Welders, this is how the manuf. do it.
    The problem with soldering, is getting sufficient heat on the terminal to bond the strip.
    Max.
     
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  10. #12

    Expert

    Nov 30, 2010
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    I use an old, diamond coated, fingernail file. It only takes a few scratches to damage the surface enough to get solder to wet it.
     
  11. crutschow

    Expert

    Mar 14, 2008
    20,075
    5,654
    I soldered wire to a bunch of NiMh batteries without problem by first putting some rosin flux on the battery ends and wire.
     
  12. ericgibbs

    Moderator

    Jan 29, 2010
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    I used plumbers paste, a bit aggressive, it works, but its important that you thoroughly clean the joint afterwards.
    Use a 60Watt iron with a chisel tip in order to heat the joint area quickly.
     
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