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Re: Toshiba battery connector(s)

Yes soldering to battery poles is a bad idea as kevin says,
but with the battery packs discussed (from toshiba laptop)
there are nickel plates spot-welded to the battery poles and
they connect to the pcb (and contacts). Soldering there is
not a problem, you're far from the batteries, as long as you
do it quick and don't use too much heat. Some batteries
(cells) are available in solder tabbed versions, like the
NiMH cells at digikey for example.

BTW I finally looked inside camcorder battery packs, there
are six cells, and like the laptop battery packs the cells are
connected in parallel (2 sets of 3 in parallel) then in series,
but the little pcb inside does the series connection. The
toshiba laptop batteries are layed out the same way except
3 sets of 3 in parallel then in series for 10.8v.

  -- Doug

kevin wang wrote:

>  From Rick Jones
> >
> > --- Doug Sutherland <> wrote:
> > > That works too, I did that earlier, but if you open the
> > > battery pack you can solder right onto the pcb.  Those
> > > contacts are attached to the pcb.
> >
> > Wouldn't soldering to the pcb be the same as soldering
> > to the contacts on the outside?  I thought soldering
> > to battery terminals was a bad idea?
>
> to explain to others why soldering is a bad idea...
>
> Most if not all batteries have safety valves to allow gassified
> electrolyte to vent outside the battery during high temperature charging.
> If not allowed to vent, you have a small pressure cooker bomb on your
> hands.
>
> This is why it's a good idea to charge your batteries when they're cool
> (and why most good battery packs have temperature sensors in them)
> because the less electrolyte you vent, the longer your battery life.
> You can't open the batteries up and add some water, like you do with
> (unsealed) car batteries.
>
>    - Kevin
>
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