Quote:
Originally Posted by MK999
i would have thought spot welding would do them more damage than soldering anyway? surely welding requires far more heat than soldering, they don't weld together by magic  |
All commercial battery packs have their cells welded together using either nickel plated steel or nickel straps. The process is resistive welding and incloves very high currents for very short periods of time. The reason hobby people solder cells together is that we dont have access to welding equipment. The soldering process can damage the cells internally.
The problem with buying pre-tagged cells is that making the connection between the two would be rather tricky as you woudl need to solder a third link between the two already on the cells. Ideally, the cells should be supplied with the links's pre welded to the cells. The type of link required already exists and is used for power tool batteries.