| One big arse one (the weird way)
1) first you take a bunch of batteries out of some project a manufacturer discarded.
in this case some 1100-1200ma LI-ION cells
i got these a long time ago, and was running a lectric scooter with them
2) Build yourself some sort of box, that will not bend to much, and that fits the batteries
at the bottom put 1" closed cell foam, or any ol foam that will have some pressure, as oppsed to going completly flat.
3) Get some metal screen materials, preferably brass, or copper , good luck finding anything descent out there. cut them close, then fold the edges to fit your box perfectally.
the material MUST be flexable, and should not be strong or pointey enough to go through the batteries top insulations, you will achieve a direct SHORT of the whole thing if you go through the insulation on the top wrap around the bottom jacket of the battery. (that was Important)
- Sand the side that will be connecting to the battery, Oxides of metals are not conducters usually, so lightly sand the metal mesh.
- Strip the connecting wires the whole distance of the box, and spread them out like hair across the whole box. use reletive size of wire for your charging and discharging load.
- The wire goes next to the batteries, then the mesh, then the foam. they do not have to CONNECT to everything, they are just getting the power from the mesh, which DOES.
- put the batteries in the box
- put your other blond wig connetor on the top of the batteries.
- preferably none of your wire, pokes itself into where it can connect to the negative or bottom side of the battery, by getting poked in by the tab top, if it does, it will light up, and be gone fast enough :-) i didnt have any problem with this at all, but its a possibility
- put that top screen on, with its sanded and flatest side down
- put the top foam on, which should fit perfectally, and provide a fair ammount of force when the lid is closed.
12) hold the lid down with something, preferably a hasp or something.
now you can ACCESS this pile of garbage any time you desire.
add or subtract batteries, check them, change them, move the whole thing, it is portable now.
13) i Always try and cut the End leads of high power stuff DIFFERENT lengths, they are far less likely to find eachother that way. (see you did learn something after all :-)
This particular one is about 100A at 3.2-4.2V it will (hopefully) be charged at 6A, and drawn off at only 10A. |
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