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Tab and bus ribbon

When you have decided what type of cell to use for your project, you can move on to purchasing the tab and bus ribbon that will connect the cells and strings of cells. Tab and bus ribbon are made from soft copper that is pressed into a flat wire. This ribbon is tin coated to make it easier to solder. Most tab and bus wire used for BSPMs is. 003 ,. 004 , and. 005 thick. [Pg.21]

For ESPMs, a. 005 thick tab ribbon is sufficient to connect the individual cells to the bus ribbon, but the bus ribbon needs to be larger to accommodate the larger current carried. For the panels described here, a 20 amp capacity conductor is needed for the bus wire. Most suppliers of cells do not have bus ribbon in the thicknesses required. Enquire and see what is available. [Pg.22]

For an ESPM as discussed in this book, use at least a. 005 thick ribbon for the cell connects. The bus ribbon needs to be able to carry the current of this ESPM, for instance. 010 thick, at /s wide or a. 020 thick at /32 wide. [Pg.23]

You can make your own tab and bus wire. Copper foil is available in thicknesses from. 002 to. 021 from McMaster-Carr or another supplier. It can be cut into thin strips to your particular specifications. You can also use flat grounding braid for bus ribbon, as it is made for heavier current carrying capacity. Grounding braid comes in a variety of thicknesses and widths and is usually tinned. Make sure to use Tinnit to tin the tab and bus if you make your own - it also helps to minimize oxidation. You can use round wire, either solid or stranded, for bus connections as well as cell connects, if you desire, but the flat ribbon is probably easier to work with. Square mils [Pg.23]

It is easy to find the current capacity of round wire in a variety of published tables for the photovoltaic enthusiast, but it is not so easy to find the current capacity of ribbon wire. Not very many people engineer their own PV panels. [Pg.23]


Tab and bus ribbon. E. Jordan Brooks or other (see Supplier URL list) Fiberboard 28"x 30"... [Pg.27]

Two ESPMs were constructed for this project. The design was based on materials that were on hand, so the finished products are not optimal, but were relatively inexpensive. For each panel back, I used a 28" x 30" sheet of rigid aluminum metal that was a little less than Vie" thick. I purchased a piece of fiberboard and cut it to 28" x 30" (the same dimensions as planned for the finished panels) so that I could use it as a peel, a soldering platform, and layout grid for the cells, tab and bus ribbon positions for the panels. I used 4 pieces of V4 x 1" aluminum bar stock for a... [Pg.29]

The particular cells that I had were 5" in width and height. I laid out the cells on the fiberboard to see how many I could fit in the 26" X 28" space with enough space left for tab and bus ribbon connects as well as enough space to stay comfortably away from the metal edges. With these cells I could just fit twenty cells (4 strings of 5 cells each) with sufficient space for tab and bus ribbon connects, and power take off leads. [Pg.31]

Supplier URLS (Click here for a more extensive list) McMaster-Carr - Many, many useful items HMC Electronics - Rosin, flux pens, solder E. Jordan Brookes Co., Inc. - Tab and bus ribbon Plastecs - Solar cells, tab ribbon All Electronics - Electronic and electrical supplies Surplus Sales Of Nebraska - Electronic and electrical supplies Element 1 Power Systems - MEAs... [Pg.247]

For these panels, I did not crimp the tabs, however, you should crimp the tabs so that your connections can expand and contract. Panels are usually exposed to environments with wide temperature fluctuations, from very hot to very cold. Crimping permits slight movement and gives flexibility that helps to ensure that the tabs stay connected to the cells and bus ribbon. Temperature extremes cause expansion and contraction that can break the connections over a period of time. [Pg.32]

The purpose of tinning is to make a solder base from which to form a joint when the ribbon is attached to the cell fingers or to tab or bus ribbon. Although the tab and bus wire comes already coated with a thin layer of tin, it is still necessary to apply more tinning on the areas to be joined. [Pg.34]

The individual cells have two tab finger lines on each side ofthe cell, so four tab ribbons had to be cut for each cell. The tab ribbon runs the total length of the cell, so the length for each tab would have to be 5", plus an extra M" for space between the cell and the bus ribbon connect, plus the width of the bus ribbon that the tab is connecting on to. So, I needed to cut 160 pieces of 5 /16" long tab ribbon for the 40 cells that would be in the two panels. Crimping the tabs... [Pg.32]

If you add a crimp to the cell tabs, add another V4" to the 5 /16" length mentioned above. The V4" will allow a Vs" high crimp. It can be a little less if you wish, but the crest or raised part of the crimp should be centered so that it falls mid point between the cell and the bus ribbon. [Pg.33]

This can be done according to how you want the finished product to iook. if you want the bus ribbon to cover aii the tab ends when you iook at them from the front of the ceiis, then tin the 3/16 on the same side for haif of them (for one panei that wouid be forty) and 3/15 on the opposite side for the next forty (see iiiustration at right), if you do this, when the bus ribbon is iaid down to be soidered to the tabs, aii the tab ends wiii be under the bus ribbon, it gives a neater finished iook to the panei, but is not necessary and wiii not affect performance. [Pg.35]

Next cut eight pieces of 26" long bus ribbon and lay them out in the bus ribbon position drawn on the fiberboard, over the tabs which extend from the cells. Tin two pieces of bus ribbon at the points where the tab ribbons will connect with them, and then tape the bus ribbons in their positions on the board on either side of the cells. Although the tape is not necessary, its... [Pg.39]


See other pages where Tab and bus ribbon is mentioned: [Pg.21]    [Pg.22]    [Pg.21]    [Pg.22]    [Pg.22]   


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