Welding Solar Cells Together – An Introduction to a DIY Solar Panel Construction
This is only a little prologue to welding sun based cells together. You may definitely know, yet before we start, it is a great idea to advise you that there are both “selected” and “un-selected” sun oriented cells available. Selected cells are somewhat more solder bar
costly, however on the off chance that you are mean to manufacture more that one board, they will spare you a pile of time, broken cells and disappointment. Sun based cells are delicate, and the more you handle or mis-handle them, the more noteworthy are the odds of breaking them. Fastening sun powered cells requires care, and on the grounds that untabbed cells successfully requires not just binding right over a cell, there is double the work and – well, odds are you will break a few.
Selected cells accompany the metal connector strips previously joined to the front “bright side face” of the cells, this strip has a free end sufficiently long to lay over the accompanying cell. These tab strips will interface the front of one cell to the contact focuses on the rear of the following, etc. Most cells are negative on the front and positive on the back thus permit the current to stream between the cells in your board.
For what reason are selected cells acceptable? All things considered, Like I stated, there is a great deal of work engaged with fastening untabbed cells. Essentially you need to patch another metal tab strip to the front of every cell BEFORE you even glance at interfacing your cells together. At the end of the day, you make a twofold showing and that means long periods of fiddly work with delicate sun based cells. Along these lines, my recommendation is, purchase selected cells. Incidentally, the patching iron ought to be a decent quality 65 to 75Watt flexible unit set at about 700F. On the off chance that you run the fastening iron excessively cool, the patch won’t run appropriately, excessively hot and you hazard harming the cells.
In any case, just in the event that you proceeded to purchase untabbed cells to set aside cash, how about we disclose what must be finished. Right off the bat, you have to patch a selecting strip to the “radiant face” of every one of your cells. There are two different ways to do this, both fiddly. You can weld the strip legitimately to the cell with motion or, pre-bind or “tin” each strip and afterward patch it to the cell. The thought is to get a strong association with the sun based cell or it won’t move current. Sun powered selecting lace ordinarily comprises of 10-15 micrometers of bind compound, regularly SN60 (60% tin and 40% lead) covered on copper strip, note this contains lead. I would abandon pre-patching the selecting strip just like somewhat apathetic. In any case, apply transition to the large glossy strips(the transport bars) on the front “radiant face” of the cell. Lay the selecting strip along the fluxed transport bar and with a level tipped binding iron, run gradually down the strip. Additional fingers are acceptable here. In the event that you made a terrible showing, the tab strip will chime straight off. Whenever done cautiously, the selecting strip will cling to the transport bar. I recommend rehearsing on a wrecked cell with some extra strip to figure out the binding. Since there are generally two of these on each sunlight based cell, there is a great deal of fiddly patching to do. Presently do you see why it is smarter to purchase selected cells?